10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended

September 30, 2019

or

☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

 Commission File No. 000-08185

TCF Financial Corporation

(Exact name of registrant as specified in its charter)

Michigan	38-2022454
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

333 W. Fort Street, Suite 1800

Detroit, Michigan 48226

(Address and Zip Code of principal executive offices)

(800) 867-9757

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock (par value $1 per share)	TCF	The NASDAQ Stock Market
Depositary shares, each representing a 1/1000th interest in a share of the 5.70% Series C Non-Cumulative Perpetual Preferred Stock	TCFCP	The NASDAQ Stock Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☑                                                   No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes ☑                                                   No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☑	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐                                                 No ☑

As of November 8, 2019, there were 153,406,792 shares outstanding of the registrant's common stock, par value $1 per share, its only outstanding class of common stock.

TABLE OF CONTENTS

 

Description	Page
Part I - Financial Information
Item 1. Financial Statements.
Consolidated Statements of Financial Condition at September 30, 2019 and December 31, 2018 (Unaudited)	1
Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2019 and 2018 (Unaudited)	2
Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2019 and 2018 (Unaudited)	3
Consolidated Statements of Equity for the Three and Nine Months Ended September 30, 2019 and 2018 (Unaudited)	4
Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2019 and 2018 (Unaudited)	6
Notes to Consolidated Financial Statements (Unaudited)	7
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.	60
Item 3. Quantitative and Qualitative Disclosures About Market Risk.	93
Item 4. Controls and Procedures.	94
Part II - Other Information
Item 1. Legal Proceedings.	95
Item 1A. Risk Factors.	95
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.	96
Item 3. Defaults Upon Senior Securities.	96
Item 4. Mine Safety Disclosures.	96
Item 5. Other Information.	97
Item 6. Index to Exhibits.	98
Signatures	99

Part I - Financial Information                                                

Item 1. Financial Statements.

TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Financial Condition (Unaudited)

(Dollars in thousands, except per share data)	At September 30, 2019			At December 31, 2018
ASSETS
Cash and cash equivalents:
Cash and due from banks	$	586,060		$	279,267
Interest-bearing deposits with other banks	736,954			307,790
Total cash and cash equivalents	1,323,014			587,057
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	290,238			91,654
Investment securities:
Available-for-sale, at fair value	5,579,835			2,470,065
Held-to-maturity, at amortized cost (fair value of $149,928 and $149,267)	144,000			148,852
Total investment securities	5,723,835			2,618,917
Loans and leases held-for-sale (includes $114,831 and $18,070 at fair value)	1,436,069			90,664
Loans and leases	33,510,752			19,073,020
Allowance for loan and lease losses	(121,218		)	(157,446		)
Loans and leases, net	33,389,534			18,915,574
Premises and equipment, net	554,194			427,534
Goodwill	1,265,111			154,757
Other intangible assets, net	215,910			20,496
Loan servicing rights	55,301			23
Other assets	1,439,305			792,936
Total assets	$	45,692,511		$	23,699,612
LIABILITIES AND EQUITY
Liabilities
Deposits:
Noninterest-bearing	$	7,979,900		$	3,936,155
Interest-bearing	27,306,174			14,967,531
Total deposits	35,286,074			18,903,686
Short-term borrowings	2,607,300			—
Long-term borrowings	860,482			1,449,472
Other liabilities	1,245,238			790,194
Total liabilities	39,999,094			21,143,352
Equity
Preferred stock, $0.01 par value
Authorized - 2,000,000 shares at September 30, 2019 and 30,000,000 shares at December 31, 2018
Issued and outstanding - 7,000 shares at both September 30, 2019 and December 31, 2018	169,302			169,302
Common stock, $1.00 par value at both September 30, 2019 and December 31, 2018
Authorized - 220,000,000 shares at September 30, 2019 and 142,268,000 shares at December 31, 2018
Issued and outstanding - 153,571,381 shares at September 30, 2019 and 88,198,460 shares at December 31, 2018	153,571			88,198
Additional paid-in capital	3,478,159			798,627
Retained earnings	1,840,214			1,766,994
Accumulated other comprehensive income (loss)	56,228			(33,138		)
Treasury stock at cost and other (4,909,069 Treasury shares at December 31, 2018)	(27,370		)	(252,182		)
Total TCF Financial Corporation shareholders' equity	5,670,104			2,537,801
Non-controlling interest	23,313			18,459
Total equity	5,693,417			2,556,260
Total liabilities and equity	$	45,692,511		$	23,699,612

See accompanying notes to consolidated financial statements.

1

TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Income (Unaudited)

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands, except per share data)	2019			2018		2019			2018
Interest income
Interest and fees on loans and leases	$	417,370		$	269,167	$	983,890		$	806,935
Interest on investment securities:
Taxable	31,038			11,498		69,745			27,491
Tax-exempt	3,385			4,328		7,277			12,991
Interest on loans held-for-sale	1,408			3,625		2,832			5,281
Interest on other earning assets	6,607			3,089		13,739			8,722
Total interest income	459,808			291,707		1,077,483			861,420
Interest expense
Interest on deposits	70,900			27,479		149,154			74,228
Interest on borrowings	17,115			10,726		48,050			31,850
Total interest expense	88,015			38,205		197,204			106,078
Net interest income	371,793			253,502		880,279			755,342
Provision for credit losses	27,188			2,270		50,879			27,874
Net interest income after provision for credit losses	344,605			251,232		829,400			727,468
Noninterest income
Fees and service charges on deposit accounts	34,384			29,175		88,504			83,703
Leasing revenue	39,590			41,944		117,032			121,001
Wealth management revenue	4,241			—		4,241			—
Card and ATM revenue	23,315			20,074		62,470			58,313
Net (losses) gains on sales of loans and leases	(5,984		)	8,502		13,374			24,900
Servicing fee revenue	5,121			6,032		14,754			21,811
Net gains (losses) on investment securities	5,900			94		7,417			181
Other	(12,309		)	6,243		(312		)	20,620
Total noninterest income	94,258			112,064		307,480			330,529
Noninterest expense
Compensation and employee benefits	155,745			124,996		395,953			372,174
Occupancy and equipment	49,229			42,337		132,789			123,562
Lease financing equipment depreciation	19,408			19,525		57,797			54,744
Net foreclosed real estate and repossessed assets	2,203			3,880		9,281			12,654
Merger-related expenses	111,259			—		124,943			—
Other	87,776			55,685		194,781			201,308
Total noninterest expense	425,620			246,423		915,544			764,442
Income before income tax expense	13,243			116,873		221,336			293,555
Income tax (benefit) expense	(11,735		)	28,034		28,866			66,083
Income after income tax (benefit) expense	24,978			88,839		192,470			227,472
Income attributable to non-controlling interest	2,830			2,643		9,401			8,766
Net income attributable to TCF Financial Corporation	22,148			86,196		183,069			218,706
Preferred stock dividends	2,494			2,494		7,481			9,094
Impact of preferred stock redemption	—			—		—			3,481
Net income available to common shareholders	$	19,654		$	83,702	$	175,588		$	206,131
Earnings per common share
Basic	$	0.15		$	1.00	$	1.79		$	2.44
Diluted	0.15			1.00		1.79			2.43
Weighted-average common shares outstanding
Basic	128,575,171			83,762,625		97,876,262			84,522,519
Diluted	128,754,588			83,808,063		98,055,279			84,791,124

See accompanying notes to consolidated financial statements.

2

TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income (Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Net income attributable to TCF Financial Corporation	$	22,148		$	86,196		$	183,069		$	218,706
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on available for sale investment securities and interest-only strips	19,230			(13,434		)	87,223			(46,059		)
Net unrealized gains (losses) on net investment hedges	1,641			(1,904		)	(2,846		)	3,479
Foreign currency translation adjustment	(1,968		)	2,899			5,014			(4,136		)
Recognized postretirement prior service cost	(9		)	(9		)	(25		)	(26		)
Total other comprehensive income (loss), net of tax	18,894			(12,448		)	89,366			(46,742		)
Comprehensive income	$	41,042		$	73,748		$	272,435		$	171,964

 See accompanying notes to consolidated financial statements.

3

TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Equity (Unaudited)

At or For the Three Months Ended September 30, 2019 and 2018

	TCF Financial Corporation
	Number of Shares Issued		Preferred Stock		Common Stock		Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)		Treasury Stock and Other			Total			Non- controlling Interest			Total Equity
(Dollars in thousands)	Preferred	Common
Balance, June 30, 2019	7,000	87,943,860	$	169,302	$	87,944	$	781,788		$	1,874,308		$	37,334	$	(265,017	)	$	2,685,659		$	24,858		$	2,710,517
Net income	—	—	—		—		—			22,148			—		—			22,148			2,830			24,978
Other comprehensive income (loss), net of tax	—	—	—		—		—			—			18,894		—			18,894			—			18,894
Reverse merger with Chemical Financial Corporation	—	65,539,678	—		65,540		2,687,153			—			—		265,863			3,018,556			—			3,018,556
Net investment by (distribution to) non-controlling interest	—	—	—		—		—			—			—		—			—			(4,375		)	(4,375		)
Repurchases of 780,716 shares of common stock	—	—	—		—		—			—			—		(32,310		)	(32,310		)	—			(32,310		)
Dividends on 5.70% Series C Preferred Stock	—	—	—		—		—			(2,494		)	—		—			(2,494		)	—			(2,494		)
Dividends on common stock of $0.35 per common share	—	—	—		—		—			(53,748		)	—		—			(53,748		)	—			(53,748		)
Stock compensation plans, net of tax	—	87,843	—		87		13,070			—			—		242			13,399			—			13,399
Change in shares held in trust for deferred compensation plans, at cost	—	—	—		—		(3,852		)	—			—		3,852			—			—			—
Balance, September 30, 2019	7,000	153,571,381	$	169,302	$	153,571	$	3,478,159		$	1,840,214		$	56,228	$	(27,370	)	$	5,670,104		$	23,313		$	5,693,417

Balance, June 30, 2018	7,000	88,166,532		$	169,302	$	88,167		$	790,933		$	1,649,449		$	(52,811	)	$	(164,107	)	$	2,480,933		$	23,646		$	2,504,579
Net income	—	—		—		—			—			86,196			—			—			86,196			2,643			88,839
Other comprehensive income (loss), net of tax	—	—		—		—			—			—			(12,448		)	—			(12,448		)	—			(12,448		)
Net investment by (distribution to) non-controlling interest	—	—		—		—			—			—			—			—			—			(5,135		)	(5,135		)
Repurchases of 477,804 shares of common stock	—	—		—		—			—			—			—			(24,026		)	(24,026		)	—			(24,026		)
Dividends on 5.70% Series C Preferred Stock	—	—		—		—			—			(2,494		)	—			—			(2,494		)	—			(2,494		)
Dividends on common stock of $0.295 per common share	—	—		—		—			—			(24,741		)	—			—			(24,741		)	—			(24,741		)
Common stock warrants exercised	—	40,304		—		40			(40		)	—			—			—			—			—			—
Stock compensation plans, net of tax	—	(5,791	)	—		(6		)	3,444			—			—			—			3,438			—			3,438
Change in shares held in trust for deferred compensation plans, at cost	—	—		—		—			1,519			—			—			(1,519		)	—			—			—
Balance, September 30, 2018	7,000	88,201,045		$	169,302	$	88,201		$	795,856		$	1,708,410		$	(65,259	)	$	(189,652	)	$	2,506,858		$	21,154		$	2,528,012

See accompanying notes to consolidated financial statements.

4

TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Equity (Unaudited)

At or For the Nine Months Ended September 30, 2019 and 2018

	TCF Financial Corporation
	Number of Shares Issued				Preferred Stock			Common Stock			Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock and Other			Total			Non- controlling Interest			Total Equity
(Dollars in thousands)	Preferred		Common
Balance, December 31, 2018	7,000		88,198,460		$	169,302		$	88,198		$	798,627		$	1,766,994		$	(33,138	)	$	(252,182	)	$	2,537,801		$	18,459		$	2,556,260
Net income	—		—		—			—			—			183,069			—			—			183,069			9,401			192,470
Other comprehensive income (loss), net of tax	—		—		—			—			—			—			89,366			—			89,366			—			89,366
Reverse merger with Chemical Financial Corporation	—		65,539,678		—			65,540			2,687,153			—			—			265,863			3,018,556			—			3,018,556
Net investment by (distribution to) non-controlling interest	—		—		—			—			—			—			—			—			—			(4,547		)	(4,547		)
Repurchases of 1,453,908 shares of common stock	—		—		—			—			—			—			—			(58,805		)	(58,805		)	—			(58,805		)
Dividends on 5.70% Series C Preferred Stock	—		—		—			—			—			(7,481		)	—			—			(7,481		)	—			(7,481		)
Dividends on common stock of $0.94 per common share	—		—		—			—			—			(102,368		)	—			—			(102,368		)	—			(102,368		)
Stock compensation plans, net of tax	—		(166,757	)	—			(167		)	(5,626		)	—			—			15,759			9,966			—			9,966
Change in shares held in trust for deferred compensation plans, at cost	—		—		—			—			(1,995		)	—			—			1,995			—			—			—
Balance, September 30, 2019	7,000		153,571,381		$	169,302		$	153,571		$	3,478,159		$	1,840,214		$	56,228		$	(27,370	)	$	5,670,104		$	23,313		$	5,693,417
Balance, December 31, 2017	4,007,000		87,473,708		$	265,821		$	87,474		$	791,465		$	1,577,311		$	(18,517	)	$	(40,797	)	$	2,662,757		$	17,827		$	2,680,584
Change in accounting principle	—		—		—			—			—			(116		)	—			—			(116		)	—			(116		)
Balance, January 1, 2018	4,007,000		87,473,708		265,821			87,474			791,465			1,577,195			(18,517		)	(40,797		)	2,662,641			17,827			2,680,468
Net income	—		—		—			—			—			218,706			—			—			218,706			8,766			227,472
Other comprehensive income (loss), net of tax	—		—		—			—			—			—			(46,742		)	—			(46,742		)	—			(46,742		)
Net investment by (distribution to) non-controlling interest	—		—		—			—			—			—			—			—			—			(5,439		)	(5,439		)
Redemption of Series B Preferred Stock	(4,000,000	)	—		(96,519		)	—			—			(3,481		)	—			—			(100,000		)	—			(100,000		)
Repurchases of 3,195,126 shares of common stock	—		—		—			—			—			—			—			(149,912		)	(149,912		)	—			(149,912		)
Dividends on 6.45% Series B Preferred Stock	—		—		—			—			—			—			—			—			—			—			—
Dividends on 5.70% Series C Preferred Stock	—		—		—			—			—			(9,094		)	—			—			(9,094		)	—			(9,094		)
Dividends on common stock of $0.885 per common share	—		—		—			—			—			(74,916		)	—			—			(74,916		)	—			(74,916		)
Common stock warrants exercised	—		533,548		—			534			(534		)	—			—			—			—			—			—
Common shares purchased by TCF employee benefit plans	—		17,594		—			17			698			—			—			—			715			—			715
Stock compensation plans, net of tax	—		176,195		—			176			5,284			—			—			—			5,460			—			5,460
Change in shares held in trust for deferred compensation plans, at cost	—		—		—			—			(1,057		)	—			—			1,057			—			—			—
Balance, September 30, 2018	7,000		88,201,045		$	169,302		$	88,201		$	795,856		$	1,708,410		$	(65,259	)	$	(189,652	)	$	2,506,858		$	21,154		$	2,528,012

See accompanying notes to consolidated financial statements.

5

TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows (Unaudited)

	Nine Months Ended September 30,
(In thousands)	2019			2018
Cash flows from operating activities
Net income	$	192,470		$	227,472
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	50,879			27,874
Share-based compensation expense	17,762			14,040
Depreciation and amortization	207,954			153,018
Provision (benefit) for deferred income taxes	(27,732		)	33,409
Net gains on sales of assets	(46,966		)	(28,977		)
Proceeds from sales of loans and leases held-for-sale	512,051			264,970
Originations of loans and leases held-for-sale, net of repayments	(548,371		)	(271,793		)
Impairment of loan servicing rights	4,520			—
Net change in other assets	(188,081		)	21,984
Net change in other liabilities	16,229			(1,849		)
Other, net	(34,793		)	(29,668		)
Net cash provided by (used in) operating activities	155,922			410,480
Cash flows from investing activities
Proceeds from sales of investment securities available-for-sale	1,993,274			—
Proceeds from maturities of and principal collected on investment securities available-for-sale	398,989			120,183
Purchases of investment securities available-for-sale	(1,424,344		)	(919,645		)
Proceeds from maturities of and principal collected on investment securities held-to-maturity	11,945			11,259
Purchases of investment securities held-to-maturity	(4,029		)	(2,187		)
Redemption of Federal Home Loan Bank stock	162,011			201,001
Purchases of Federal Home Loan Bank stock	(142,000		)	(199,000		)
Proceeds from sales of loans and leases	566,880			675,164
Loan and lease originations and purchases, net of principal collected	(674,459		)	735,840
Proceeds from sales of other assets	82,970			58,879
Purchases of premises and equipment and lease equipment	(108,404		)	(903,394		)
Net cash acquired (paid) in business combination	975,014			—
Other, net	(6,743		)	15,151
Net cash provided by (used in) investing activities	1,831,104			(206,749		)
Cash flows from financing activities
Net change in deposits	(15,296		)	163,442
Net change in short-term borrowings	(17,292		)	2,451
Proceeds from long-term borrowings	2,799,986			7,043,458
Payments on long-term borrowings	(3,838,454		)	(7,118,690		)
Payments on liabilities related to acquisition and portfolio purchase	(1,000		)	—
Redemption of Series B preferred stock	—			(100,000		)
Repurchases of common stock	(58,804		)	(149,912		)
Common shares sold to TCF employee benefit plans	—			715
Dividends paid on preferred stock	(7,481		)	(9,094		)
Dividends paid on common stock	(102,368		)	(74,916		)
Exercise of stock options	—			(997		)
Payments related to tax-withholding upon conversion of share-based awards	(5,813		)	(6,563		)
Net investment by (distribution to) non-controlling interest	(4,547		)	(5,439		)
Net cash provided by (used in) financing activities	(1,251,069		)	(255,545		)
Net change in cash and due from banks	735,957			(51,814		)
Cash and cash equivalents at beginning of period	587,057			621,782
Cash and cash equivalents at end of period	$	1,323,014		$	569,968
Supplemental disclosures of cash flow information
Cash paid (received) for:
Interest on deposits and borrowings	$	192,793		$	99,336
Income taxes, net	10,367			(21,035		)
Noncash activities:
Transfer of loans and leases to other assets	73,314			77,704
Transfer of loans and leases from held for investment to held for sale, net	1,837,445			644,488

See accompanying notes to consolidated financial statements.

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TCF FINANCIAL CORPORATION AND SUBSIDIARIES

Notes to Consolidated Financial Statements (Unaudited)

Note 1. Basis of Presentation

On August 1, 2019 (the "Merger Date"), TCF Financial Corporation, a Delaware corporation ("Legacy TCF"), merged with and into Chemical Financial Corporation, a Michigan corporation ("Chemical"), with Chemical continuing as the surviving legal corporation (the "Merger"). Immediately following the Merger, Chemical’s wholly owned bank subsidiary, Chemical Bank, a Michigan state-chartered bank, merged with and into Legacy TCF’s wholly owned bank subsidiary, TCF National Bank, a national banking association, with TCF National Bank surviving the merger (“TCF Bank”). Upon completion of the Merger, Chemical was renamed TCF Financial Corporation. TCF Financial Corporation (together with its direct and indirect subsidiaries, "we," "us," "our," "TCF" or the "Corporation"), is a financial holding company, headquartered in Detroit, Michigan. TCF Bank has its main office in Sioux Falls, South Dakota. References herein to "TCF Financial" or the "Holding Company" refer to TCF Financial Corporation on an unconsolidated basis.

The Merger was accounted for as a reverse merger using the acquisition method of accounting, which means that for accounting and financial reporting purposes, Legacy TCF was deemed to have acquired Chemical in the Merger, even though Chemical was the legal acquirer. Accordingly, Legacy TCF's historical financial statements are the historical financial statements of the combined company for all periods before the Merger Date. TCF's results of operations for the third quarter of 2019 and the first nine months of 2019 include the results of operations of Chemical on and after August 1, 2019. Results for periods before August 1, 2019 reflect only those of Legacy TCF and do not include the results of operations of Chemical. The number of shares issued and outstanding, earnings per share, additional paid-in-capital, dividends paid and all references to share quantities of TCF have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of Legacy TCF common stock in the Merger. See Note 2. Merger for further information. In addition, the assets and liabilities of Chemical as of the Merger Date have been recorded at their estimated fair value and added to those of Legacy TCF.

TCF Bank operates bank branches in Michigan, Minnesota, Illinois, Ohio, Indiana, Colorado, Wisconsin, Arizona and South Dakota (TCF's "primary banking markets"). Through its direct subsidiaries, TCF Bank provides a full range of consumer-facing and commercial services, including consumer and commercial banking, trust and wealth management, and specialty leasing and lending products and services to consumers, small businesses and commercial customers.

The accompanying unaudited consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and in accordance with the instructions to Quarterly Report on Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission ("SEC"). Accordingly, the consolidated financial statements do not include all of the information and notes necessary for complete financial statements in conformity with GAAP. In the opinion of management, the accompanying unaudited consolidated financial statements contain all the significant adjustments, consisting of normal recurring items, considered necessary for fair presentation. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. These interim unaudited financial statements should be read in connection with the Legacy TCF audited Consolidated Financial Statements and notes thereto, at and for the year ended December 31, 2018, which were filed as Exhibit 99.1 to TCF's Current Report on Form 8-K filed with the SEC on August 1, 2019, and together with Management's Discussion and Analysis of Financial Condition and Results of Operations included in the Annual Report on Form 10-K of Legacy TCF for the year ended December 31, 2018.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. These estimates are based on information available to management at the time the estimates are made. Actual results could differ from those estimates. Certain reclassifications have been made to prior period financial statements to conform to the current period presentation.

In connection with the Merger, effective August 1, 2019, TCF renamed its Wholesale Banking segment to Commercial Banking to align with the way TCF is now managed. In addition, activity that was related to small business banking and private banking were moved from the Wholesale Banking (now named Commercial Banking) segment to the Consumer Banking segment. The revised presentation of previously reported segment data has been applied retroactively for all periods presented in these financial statements. See Note 25. Reportable Segments for further information.

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Note 2. Merger

As described in Note 1. Basis of Presentation, on August 1, 2019, we completed our Merger with Legacy TCF.

The Merger was an all-stock transaction. Pursuant to the merger agreement, on the Merger Date, each holder of Legacy TCF common stock received 0.5081 shares (the "Exchange Ratio") of TCF's common stock for each share of Legacy TCF common stock held. Each outstanding share of common stock of Chemical remained outstanding and was unaffected by the Merger other than by the change of the Corporation’s name from Chemical Financial Corporation to TCF Financial Corporation. As of the effective time of the Merger on August 1, 2019, TCF Financial had approximately 153.5 million shares of common stock outstanding. On the Merger Date, the shares of Legacy TCF common stock, which previously traded under the ticker symbol "TCF" on the New York Stock Exchange (the "NYSE") ceased trading on, and were delisted from, the NYSE. Following the Merger, TCF Financial common stock continues to trade on the Nasdaq Stock Market (“NASDAQ”), but its ticker symbol changed from "CHFC" to "TCF" effective August 1, 2019.

Pursuant to the merger agreement, each outstanding share of Legacy TCF 5.70% Series C Non-Cumulative Perpetual Preferred Stock, with a liquidation preference of $25,000 per share (the "Legacy TCF Preferred Stock") was converted into the right to receive one share of newly created 5.70% Series C Non-Cumulative Perpetual Preferred Stock of TCF, with a liquidation preference of $25,000 per share (the "New TCF Preferred Stock"), and each depository share representing 1/1000^th of a share of Legacy TCF Preferred Stock was converted into one depositary share representing 1/1000th of a share of New TCF Preferred Stock. Immediately following the effective time of the Merger, as of August 1, 2019, TCF Financial had 7,000 shares of New TCF Preferred Stock outstanding and 7.0 million related depositary shares outstanding.

The Merger constituted a business combination and was accounted for as a reverse merger using the acquisition method of accounting. As a result, Legacy TCF was the accounting acquirer, and Chemical was the legal acquirer and the accounting acquiree. Therefore, the historical financial statements of Legacy TCF became the historical financial statements of the combined company. In addition, the assets, including the intangible assets identified, and liabilities of Chemical as of the Merger Date, have been recorded at their estimated fair value and added to those of Legacy TCF. In many cases, the determination of fair value required management to make estimates about discount rates, expected future cash flows, market conditions and other future events that are highly subjective in nature and subject to change.

As the legal acquirer, Chemical (now TCF Financial Corporation) issued approximately 81.9 million shares of TCF Financial common stock in connection with the Merger, which represented approximately 53% of the voting interests in TCF Financial upon completion of the Merger. Guidance in Accounting Standards Codification ("ASC") 805-40-30-2 explains that the purchase price in a reverse acquisition is determined based on “the number of equity interests the legal acquiree would have had to issue to give the owners of the legal acquirer the same percentage equity interest in the combined entity that results from the reverse acquisition.” The first step in calculating the purchase price in the Merger is to determine the ownership of the combined company following the Merger. The table below summarizes the ownership of the combined company (TCF Financial) following the Merger, as well as the market capitalization of the combined company using shares of Chemical and Legacy TCF common stock outstanding at July 31, 2019 and Chemical’s closing price on July 31, 2019.

(In thousands)	TCF Financial Ownership and Market Value Table
	Number of Chemical Outstanding Shares	Percentage Ownership		Market Value at $42.04 Chemical Share Price
Chemical shareholders	71,559	46.62	%	$	3,008,330
Legacy TCF shareholders	81,920	53.38		3,443,938
Total	153,479	100		$	6,452,268

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Next, the hypothetical number of shares Legacy TCF would have to issue to give Chemical owners the same percentage ownership in the combined company is calculated in the table below (based on shares of Legacy TCF common stock outstanding at July 31, 2019):

(In thousands)	Hypothetical Legacy TCF Ownership
	Number of Legacy TCF Outstanding Shares	Percentage Ownership
Chemical shareholders	140,836	46.62	%
Legacy TCF shareholders	161,229	53.38
Total	302,065	100	%

Finally, the purchase price is calculated based on the number of hypothetical shares of Legacy TCF common stock issued to Chemical shareholders multiplied by the share price as demonstrated in the table below (amounts in thousands except per share data).

(In thousands, except per share data)
Number of hypothetical Legacy TCF shares issued to Chemical shareholders	140,835,967
Legacy TCF market price per share as of July 31, 2019	$	21.38
Purchase price determination of hypothetical Legacy TCF shares issued to Chemical shareholders	3,011,073
Value of Chemical stock options hypothetically converted to options to acquire shares of Legacy TCF common stock	7,335
Cash in lieu of fractional shares	148
Purchase price consideration	$	3,018,556

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The following table provides the purchase price allocation as of the Merger Date and the Chemical assets acquired and liabilities assumed at their estimated fair value as of the Merger Date as recorded by TCF. We recorded the estimate of fair value based on initial valuations available at the Merger Date and these estimates are considered preliminary and subject to adjustment for up to one year after the Merger Date. While we believe that the information available on the Merger Date provided a reasonable basis for estimating fair value, we expect that we may obtain additional information and evidence during the measurement period that would result in changes to the estimated fair value amounts. The measurement period ends on the earlier of one year after the Merger Date or the date we are able to determine that we have obtained all necessary information about the facts and circumstances that existed as of Merger Date. Subsequent adjustments to fair value, if necessary, will be reflected in our future filings. These adjustments include: (i) changes in the estimated fair value of loans acquired, (ii) changes in the estimated fair value of intangible assets acquired, (iii) changes in deferred tax assets related to fair value estimates and changes in the expected realization of items considered to be net operating loss carryforwards and (iv) changes in goodwill as a result of the net effect of any adjustments.

(In thousands)
Purchase price consideration:
Stock	$	3,018,556
Fair value of assets acquired:
Cash and cash equivalents	975,014
Federal Home Loan Bank and Federal Reserve Bank stocks	218,582
Investment securities	3,774,738
Loans held-for-sale	44,532
Loans and leases	15,726,213
Premises and equipment	140,219
Loan servicing rights	59,567
Other intangible assets	201,568
Net deferred tax asset(1)	49,345
Other assets	553,796
Total assets acquired	21,743,574
Fair value of liabilities assumed:
Deposits	16,418,019
Short-term borrowings	2,629,426
Long-term borrowings	442,323
Other liabilities	345,604
Total liabilities assumed	19,835,372
Fair value of net identifiable assets	1,908,202
Goodwill resulting from Merger(2)	$	1,110,354

(1) Net deferred tax asset includes acquisition-related fair value adjustments, loss and tax credit carry forwards, mortgage servicing rights and core deposit and customer intangibles.

(2) The goodwill recorded was primarily attributable to the synergies and economies of scale expected from combining the operations of Legacy TCF and Chemical.

As described in more detail in Note 3. Summary of Significant Accounting Policies below, all Chemical loans and leases were recorded at their estimated fair value as of the Merger Date with no carryover of the related allowance for loans and lease losses. These loans were segregated into two classifications at acquisition, purchased credit impaired (“PCI”) loans accounted for under the provisions of Accounting Standards Codification ("ASC") Topic 310-30, and purchased nonimpaired loans, also referred to as purchased loans. The excess of cash flows expected to be collected over the estimated fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated remaining life of the loan using the effective yield method. The difference between the contractually required payments and the cash flows expected to be collected at acquisition, considering the impact of prepayment and estimates of future credit losses expected to be incurred, is referred to the nonaccretable difference.

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Information regarding acquired loans included in net loans and leases acquired at the Merger Date was as follows:

(In thousands)
PCI loans:
Contractually required payments receivable	$	458,374
Nonaccretable difference	(105,031		)
Expected cash flows	353,343
Accretable yield	39,733
Fair value of PCI loans	$	313,610
Purchased nonimpaired loans and leases:
Unpaid principal balance	$	15,636,020
Fair value discount	(223,417		)
Fair value at acquisition	15,412,603
Total fair value at acquisition	$	15,726,213

Supplemental disclosures of cash flow information related to investing and financing activities regarding the Merger are as follows for the nine months ended September 30, 2019:

(In thousands)
Business combination
Fair value of tangible assets acquired	$	21,482,439
Goodwill, loan servicing rights and other identifiable intangible assets acquired	1,371,489
Liabilities assumed	19,835,372
Common stock and stock options converted	3,018,556

Other intangible assets consisted of core deposits and customer relationship intangibles with estimated fair values at the Merger Date of $177.8 million and $23.8 million, respectively. Core deposit intangibles are being amortized over a weighted-average life of ten years on an accelerated basis. Customer relationship intangibles are being amortized over a weighted-average life of 15.6 years based on expected economic benefits of the underlying intangible assets. The weighted-average life of amortizable intangibles acquired in the Merger was eleven years.

As a result of the Merger, we recorded $1.1 billion of goodwill. Due to the timing of the Merger, we are in the process of completing our analysis of the allocation of goodwill across business segments, and, therefore, goodwill is presented as part of Enterprise Services at September 30, 2019. The goodwill recorded is not deductible for income tax purposes.

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Pro Forma Combined Results of Operations The following pro forma financial information presents the consolidated results of operations of Legacy TCF and Chemical as if the Merger had occurred as of January 1, 2018 with pro forma adjustments. The pro forma adjustments give effect to any change in interest income due to the accretion of the discount (premium) associated with the fair value adjustments to acquired loans, any change in interest expense due to estimated premium amortization/discount accretion associated with the fair value adjustments to acquired time deposits and borrowings and other debt and the amortization of the core deposit intangible that would have resulted had the deposits been acquired as of January 1, 2018. Merger-related expenses incurred by TCF during the three and nine months ended September 30, 2019 are not reflected in the pro forma amounts. The pro forma information does not necessarily reflect the results of operations that would have occurred had Legacy TCF merged with Chemical at the beginning of 2018. Anticipated cost savings that have not yet been realized are also not reflected in the pro forma amounts for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands, except per share data)	2019		2018		2019		2018
Net interest income and other noninterest income	$	536,165	$	570,396	$	1,654,571	$	1,693,537
Net income	125,560		156,977		435,003		434,686
Net income available to common shareholders	123,066		154,483		427,522		422,111
Earnings per share:
Basic	$	0.81	$	1.00	$	2.79	$	2.71
Diluted	0.81		0.99		2.77		2.69

Note 3. Summary of Significant Accounting Policies

Accounting policies in effect at December 31, 2018, as previously disclosed in Note 2. Summary of Significant Accounting Policies in Legacy TCF’s audited Consolidated Financial Statements at and for the year ended December 31, 2018, which were filed as Exhibit 99.1 to TCF’s Current Report on Form 8-K filed with the SEC on August 1, 2019, remain significantly unchanged and have been followed similarly as in previous periods except for the lease financing accounting policy, resulting from the adoption of Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842) and related ASUs, and certain policies added as a result of the Merger, as described below.

Business Combinations Pursuant to the guidance of ASC Topic 805 ("ASC 805"), TCF recognized assets acquired, including identified intangible assets, and the liabilities assumed in mergers and acquisitions at their fair values as of the acquisition date, with the acquisition and merger-related transaction and restructuring costs expensed in the period incurred.

ASC 805 affords a measurement period beyond the acquisition date that allows the opportunity to finalize the acquisition accounting in the event that new information is identified that existed as of the acquisition date but was not known or available at that time. This measurement period ends on the earlier of one year after the acquisition or the date information about the facts and circumstances that existed at the acquisition are available. TCF anticipates that measurement period adjustments may arise from adjustments to the fair values of Chemical's assets and liabilities recorded at the Merger Date, as additional information and evidence is obtained. In the event that a measurement period adjustment is identified, TCF will recognize the adjustment as part of its acquisition accounting, which may result in an adjustment to goodwill in the period the adjustment was identified.

See Note 2. Merger for further information.

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Loans and Leases Acquired in a Business Combination We record loans and leases acquired in a business combination at fair value at the acquisition date and the fair value discount or premium is recognized as an adjustment to yield over the remaining life of each loan or lease. Credit discounts are included in the determination of fair value; therefore, an allowance for loan and lease losses is not recorded at the acquisition date. Purchased loans are evaluated at the acquisition date and classified as either (i) loans purchased without evidence of deteriorated credit quality since origination, referred to as purchased loans, or (ii) loans purchased with evidence of deteriorated credit quality since origination for which it is probable that all contractually required payments will not be collected, referred to as PCI loans. PCI loans are considered to be impaired and are accounted for under ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality ("ASC 310-30"). In determining whether a purchased loan should be classified as a PCI loan, we must make numerous assumptions, interpretations and judgments using internal and third-party credit quality information to determine whether or not it is probable that we will be able to collect all contractually required payments. This is a point in time assessment and is inherently subjective due to the nature of the available information and judgment involved. Evidence of credit quality deterioration as of the acquisition date may include statistics such as past due and nonaccrual status, recent borrower credit scores and loan-to-value percentages. The excess of cash flows expected to be collected over the estimated fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated remaining life of the loan using the effective yield method. We estimate the expected cash flows based on the expected remaining life of the loans, which includes the effects of estimated prepayments and estimates of future credit losses. Cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change. The difference between the contractually required payments and the cash flows expected to be collected at acquisition, is referred to as the nonaccretable difference.

We do not classify PCI loans as nonaccrual loans subsequent to acquisition because the loans are recorded at net realizable value based on the principal and interest expected to be collected on the loan. Judgment is required to estimate the timing and amount of cash flows expected to be collected when the loans are not performing in accordance with the original contractual terms.

Purchased loans outside the scope of ASC 310-30 are accounted for under ASC 310-20, Receivables - Nonrefundable Fees and Other Costs. For purchased loans, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value and the discount is accreted to interest income over the life of the loan. Subsequent to the purchase date, the method used to evaluate the sufficiency of the credit discount is similar to originated loans, and if necessary, additional reserves are recognized in the allowance for loan and lease losses.

Leases TCF enters into lease contracts as both a lessor and a lessee. A contract, or part of a contract, is considered a lease if it conveys the right to obtain substantially all of the economic benefits from, and the right to direct and use, an identified asset for a period of time in exchange for consideration. The determination of lease classification requires various judgments and estimates by management which may include the fair value of the equipment at lease inception, useful life of the equipment under lease, estimate of the lease residual value and collectability of minimum lease payments. Management has policies and procedures in place for the determination of lease classification and review of the related judgments and estimates for all leases.

As a lessor, TCF provides various types of lease financing that are classified for accounting purposes as direct financing, sales-type or operating leases. Leases that transfer substantially all of the benefits and risks of ownership to the lessee are classified as direct financing or sales-type leases and are recorded in loans and leases. Direct financing and sales-type leases are carried at the combined present value of future minimum lease payments and lease residual values.

Interest income on net investment in direct financing and sales-type leases is recognized using methods that approximate a level yield over the fixed, non-cancelable term of the lease, including pro rata rent payments received for the interim period until the lease contract commences and the fixed, non-cancelable lease term begins. Sales-type leases generate selling profit (loss), which is recognized on the commencement date by recording lease revenue net of lease cost. Lease revenue consists of the present value of the future minimum lease payments and lease cost consists of the leased equipment's net book value, less the present value of its residual.

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Some lease financing contracts include a residual value component, which represents the estimated fair value of the leased equipment at the expiration of the initial term of the transaction. The estimation of residual values involves judgment regarding product and technology changes, customer behavior, shifts in supply and demand and other economic assumptions. TCF reviews residual assumptions when assessing potential impairment of the net investment in direct financing and sales-type leases each quarter. Decreases in the expected residual value are reflected through an increase in the provision for credit losses, which results in an increase to the allowance for loan and lease losses.

TCF may sell minimum lease payment receivables, primarily as a credit risk reduction tool, to third-party financial institutions at fixed rates, on a non-recourse basis, with its underlying equipment as collateral. For those transactions that qualify for sale accounting, the related lease cash flow stream and the non-recourse financing are derecognized. For those transactions that do not qualify for sale accounting, the underlying lease remains on TCF's Consolidated Statements of Financial Condition and non-recourse debt is recorded in the amount of the proceeds received. TCF retains servicing of these leases and bills, collects and remits funds to the third-party financial institution. Upon default by the lessee, the third-party financial institutions may take control of the underlying collateral which TCF would otherwise retain as residual value.

Leases that do not transfer substantially all benefits and risks of ownership to the lessee are classified as operating leases. Such leased equipment and related initial direct costs are included in other assets and depreciated to their estimated salvage value on a straight-line basis over the term of the lease. Lease financing equipment depreciation is recorded in noninterest expense. Operating lease payments received are recognized as lease income when due and recorded as a component of leasing and equipment finance noninterest income. An allowance for lease losses is not provided on operating leases.

See Note 7. Loans and Leases for further information.

As a lessee, TCF enters into contracts to lease real estate, information technology equipment and various other types of equipment. Leases that transfer substantially all of the benefits and risks of ownership to TCF are classified as finance leases, while all others are classified as operating leases. At lease commencement, a lease liability and right-of-use asset are calculated and recognized for both types of leases. The lease liability is equal to the present value of future minimum lease payments. The right-of-use asset is equal to the lease liability, plus any initial direct costs and prepaid lease payments, less any lease incentives received. Operating lease right-of-use assets are recorded in other assets and finance lease right-of-use assets are recorded in premises and equipment, net. TCF uses the appropriate term Federal Home Loan Bank ("FHLB") rate to determine the discount rate for the present value calculation of future minimum payments when an implicit rate is not known for a given lease. The lease term used in the calculation includes any options to extend that TCF is reasonably certain to exercise.

Subsequent to lease commencement, lease liabilities recorded for finance leases are measured using the effective interest rate method and the related right-of-use assets are amortized on a straight-line basis over the lease term. Interest expense and amortization expense are recorded separately in the income statement in interest expense on borrowings and occupancy and equipment noninterest expense, respectively. For operating leases, total lease cost is comprised of lease expense, short-term lease cost, variable lease cost and sublease income. Lease expense includes future minimum lease payments, which are recognized on a straight-line basis over the lease term, as well as common area maintenance charges, real estate taxes, insurance and other expenses, where applicable, which are expensed as incurred. Total lease cost for operating leases is recorded in occupancy and equipment noninterest expense.

See Note 12. Operating Lease Right-of-Use Assets and Liabilities for further information.

Loan Servicing Rights Loan servicing rights ("LSRs") are recognized as assets or liabilities as a result of selling residential mortgage and commercial real estate loans in the secondary market while retaining the right to service these loans and receive servicing income over the life of the loan, and from acquisitions of other banks that had LSRs. An LSR is recorded at estimated fair value when initially recognized. Fair value is determined by the present value of expected cash flows received in excess of a market servicing rate. If the amount earned to service assets is equal to the market rate, no value is recorded. Subsequently, LSRs are accounted for at the lower of amortized cost or fair value and amortized in proportion to and over the period of net servicing income. Unexpected prepayments of mortgage loans result in increased amortization of LSRs, as the remaining book value of the LSRs is expensed at the time of prepayment. LSRs are assessed quarterly for impairment. See Note 11. Loan Servicing Rights for further information.

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Recently Adopted Accounting Pronouncements

Effective January 1, 2019, TCF adopted ASU No. 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes, which permits the use of the OIS Rate based on the SOFR as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct Treasury obligations of the U.S. government, the London Interbank Offered Rate ("LIBOR") swap rate, the OIS Rate based on the Fed Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. The adoption of this ASU was on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after January 1, 2019. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force), which requires the decision to capitalize or expense implementation costs incurred in a cloud computing arrangement (i.e. a hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40. TCF's policy had been to expense these costs as incurred. The adoption of this ASU was on a prospective basis. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, which simplifies the accounting for share-based payments to nonemployees by aligning it more consistently with the accounting for share-based payments to employees. The new guidance in ASC 718 supersedes the guidance in ASC 505-50. The adoption of this ASU was on a modified retrospective basis with no cumulative effect adjustment recorded. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2017-11, Earnings Per Share (Topic 260): Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, which simplifies the accounting for certain equity-linked financial instruments and embedded features with the down round features that reduce the exercise price when the pricing of a future round of financing is lower. The adoption of this ASU was on a modified retrospective basis. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2016-02, Leases (Topic 842), which, along with other amendments, requires lessees to recognize most leases on their balance sheet. Lessor accounting is largely unchanged. The ASU requires both quantitative and qualitative disclosure regarding key information about leasing arrangements from both lessees and lessors. Effective January 1, 2019, TCF also adopted the following ASUs, which further amend the original lease guidance in Topic 842: (i) ASU No. 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840) and Leases (Topic 842): Amendments to SEC Paragraphs, which rescinds certain SEC Observer comments and staff announcements from the lease guidance and incorporates SEC staff announcements on the effect of a change in tax law on leveraged leases from ASC 840 into ASC 842; (ii) ASU No. 2018-01, Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842, which amends the new lease guidance to add an optional transition practical expedient that permits an entity to continue applying its current accounting policy for land easements that existed or expired before January 1, 2019; (iii) ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which makes narrow scope improvements to the standard for specific issues; (iv) ASU No. 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method allowing the standard to be applied at the adoption date and provides a practical expedient related to separating components of a contract for lessors; (v) ASU No. 2018-20, Leases (Topic 842): Narrow-Scope Improvements for Lessors, which allows lessors to elect to account for all sales taxes as lessee costs, instead of determining whether they are lessee or lessor costs in each individual jurisdiction. It requires lessor costs paid by lessees directly to third parties to be excluded from revenue, requires lessors to account for costs excluded from the consideration of a contract that are paid by the lessor as revenue and requires certain variable payments to be allocated (rather than recognized) to lease and nonlease components when changes occur in the facts and circumstances on which the variable payments are based; and (vi) ASU No. 2019-01, Leases (Topic 842): Codification Improvements, which allows lessors that are not manufacturers or dealers to calculate the fair value of an underlying asset as its cost less any volume or trade discount, requires lessors to classify principal payments received from direct financing and sales-type leases as investing activities in the statement of cash flows and clarifies that certain disclosure requirements that were explicitly excluded from annual reporting during the year of adoption are also excluded from interim reporting during the same year. These

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ASUs were adopted on a modified retrospective basis. Management elected the practical expedients and optional transition method, which allow for leases entered into prior to January 1, 2019 to be accounted for consistent with prior guidance. Management evaluated TCF's leasing contracts and activities, and developed methodologies and processes to estimate and account for the right-of-use assets and lease liabilities based on the present value of future lease payments. On January 1, 2019, TCF recorded right-of-use assets and lease liabilities totaling $91.9 million and $112.8 million, respectively. TCF also recorded additional right-of-use assets and lease liabilities totaling $39.8 million and $41.6 million on August 1, 2019 as a result of the Merger. The impact to capital ratios as a result of increased risk-weighted assets is immaterial. The adoption of this guidance did not result in a material change to lessee expense recognition. The changes to lessor accounting, as well as changes in customer behavior driven by the adoption of these ASUs, impacts the results of TCF's leasing and equipment financing businesses, including earlier recognition of expense due to a narrower definition of initial direct costs and the timing of revenue recognition for certain leases, resulting in more revenue being deferred over the lease term.

Recently Issued but Not Yet Adopted Accounting Pronouncements

In November 2018, the Financial Accounting Standards Board (the "FASB") issued ASU No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606, which makes targeted improvements to the accounting for collaborative arrangements in response to questions raised as a result of the issuance of ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities, which provides an elective exemption to private companies from applying variable interest entities ("VIE") guidance to all entities under common control if certain criteria are met. In addition, this ASU contains an amendment applicable to all entities which amends how a decision maker or service provider determines whether its fee is a variable interest in a VIE when a related party under common control also has an interest in the VIE. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement, which eliminates, adds and modifies certain disclosure requirements for fair value measurements. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Certain of the amendments require prospective application, while the remainder require retrospective application. Early adoption is allowed either for the entire standard or only the provisions that eliminate or modify the requirements. Management is currently evaluating which adoption method will be selected as well as the related potential impact of this guidance on our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This ASU simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Subsequent to adoption, goodwill impairment will be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance largely remains unchanged. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020 on a prospective basis. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which changes the impairment model for most financial assets (including off-balance sheet exposure), including trade and other receivables, debt securities held to maturity, loans, net investments in leases and purchased financial assets with credit deterioration. The ASU requires the use of a current expected credit loss ("CECL") methodology to determine the allowance for credit losses for loans and debt securities held to maturity. CECL requires loss estimates for the remaining estimated life of the asset to be measured using historical loss data as well as reasonable and supportable forecasts based on current and forecasted economic conditions. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, which clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 and should be accounted for in accordance with Topic 842. In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and

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Hedging, and Topic 825, Financial Instruments, which clarifies and corrects certain unintended applications of the guidance contained in each of the amended Topics. In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments - Credit Losses (Topic 326): Targeted Transition Relief, which provides an option to irrevocably elect the fair value option in Subtopic 825-10 to certain instruments within the scope of Subtopic 326-20 upon adoption of Topic 326. The adoption of these ASUs will be required on a modified retrospective basis with a cumulative effect adjustment required beginning January 1, 2020 with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. CECL represents a significant change in GAAP and is expected to result in a material impact to our consolidated financial statements and capital ratios. The impact of these ASUs will depend on the composition of TCF's portfolios, the current economic conditions, and forecasted macroeconomic conditions at the date of adoption. Additionally, industry practice and interpretation of the ASUs continues to evolve which may impact management's implementation of the standard.

TCF has established a governance structure to implement these ASUs and has developed a majority of the methodology and models to be used upon adoption. Based on parallel runs of the CECL process that TCF has performed alongside our current allowance for loan and lease losses process, we preliminarily estimated that the adoption of the standard will increase the allowance for loan and lease losses between 35% to 45% on Legacy TCF portfolios, when compared to current allowance for loan and lease loss levels. At September 30, 2019, Legacy TCF loan and lease portfolios totaled approximately $17.8 billion with a corresponding allowance for loans and lease losses of approximately $117.1 million. The largest impact is anticipated to be to our consumer segment given the longer duration of the portfolios. Management is in the process of finalizing model validations and approval of all key design decisions through its governance structure, which includes decisions about the methodology for estimating reserves for unfunded commitments and disclosures. The estimated impact of the standard depends on the composition of the portfolio, credit quality, economic conditions and forecasts at the time of adoption, as well as final decisions by management, all of which could result in a change to management’s estimate.

With the close of the Merger on August 1, 2019, management is evaluating the impact of CECL on the acquired legacy Chemical portfolio which will then be included in the combined portfolio of TCF upon adoption. The loans and leases acquired in the Merger were recorded at estimated fair value on the Merger Date, which includes an estimate of credit losses. Under current GAAP, an allowance for loan and lease losses is not recorded on these loans and leases until there is evidence of credit deterioration post acquisition. However, upon adoption of CECL an allowance for loan and lease loss will need to be recorded for the acquired loans based on the lifetime loss concept within CECL. We are in the process of developing CECL assumptions on the acquired Chemical portfolios with those used by Legacy TCF. Since these assumptions could materially impact the estimate of the allowance for loan and lease losses under CECL, we are unable to estimate the impact on the Chemical portfolio at this time.

The initial increase to TCF's allowance for loan and lease losses will be recorded as an adjustment to beginning of the year retained earnings. Post adoption, as loans and leases are added to the portfolio, we expect higher levels of allowance for loan and lease losses determined by CECL assumptions, resulting in higher levels of provision for credit losses. Management will continue to refine this process during the fourth quarter of 2019 as well as consider the impacts the Merger will have on the adoption of the standard.

Note 4.  Cash and Cash Equivalents

At September 30, 2019 and December 31, 2018, TCF Bank was required by Federal Reserve regulations to maintain reserves of $149.6 million and $106.2 million, respectively, in cash on hand or at the Federal Reserve Bank.

TCF maintains cash balances that are restricted as to their use in accordance with certain obligations. Cash payments received on loans serviced for third parties are generally held in separate accounts until remitted. TCF may also retain cash balances for collateral on certain borrowings and derivatives. TCF maintained restricted cash totaling $72.7 million and $38.3 million at September 30, 2019 and December 31, 2018, respectively.

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Note 5. Federal Home Loan Bank and Federal Reserve Bank Stocks

Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stocks were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
FHLB stock, at cost	$	184,483	$	54,019
FRB stock, at cost	105,755		37,635

The investments in FHLB stock are required investments related to TCF's membership and borrowings in the FHLB of Des Moines, and additional current borrowings from the FHLB of Indianapolis and Cincinnati. TCF's investments in the FHLB of Des Moines could be adversely impacted by the financial operations of the Federal Home Loan Banks and actions of their regulator, the Federal Housing Finance Agency. The amount of FRB stock that TCF Bank is required to hold is based on TCF Bank's capital structure. TCF periodically evaluates investments for other than temporary impairment. There was no impairment of these investments at September 30, 2019 and December 31, 2018.

Note 6.  Investment Securities

The amortized cost and fair value of investment securities were as follows:

	Investment Securities Available-for-sale, At Fair Value
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
At September 30, 2019
Debt securities:
Government and government-sponsored enterprises	$	247,666	$	2	$	521	$	247,147
Obligations of states and political subdivisions	779,263		11,017		609		789,671
Mortgage-backed:
Agency mortgage-backed securities	3,456,110		66,929		4,327		3,518,712
Non-agency mortgage-backed securities	—		—		—		—
Agency collateralized mortgage obligations	565,959		12,484		101		578,342
Non-agency collateralized mortgage obligations	445,174		934		570		445,538
Total mortgage-backed debt securities	4,467,243		80,347		4,998		4,542,592
Corporate debt and trust preferred securities	450		—		25		425
Total debt securities available-for-sale	5,494,622		91,366		6,153		5,579,835
Total investment securities available-for-sale	$	5,494,622	$	91,366	$	6,153	$	5,579,835
At December 31, 2018
Debt securities:
Government and government-sponsored enterprises	$	—	$	—	$	—	$	—
Obligations of states and political subdivisions	566,304		46		9,479		556,871
Mortgage-backed:
Agency mortgage-backed securities	1,845,451		8,026		26,728		1,826,749
Non-agency mortgage-backed securities	—		—		—		—
Agency collateralized mortgage obligations	85,245		1,196		—		86,441
Non-agency collateralized mortgage obligations	4		—		—		4
Total mortgage-backed debt securities	1,930,700		9,222		26,728		1,913,194
Corporate debt and trust preferred securities	—		—		—		—
Total debt securities available-for-sale	2,497,004		9,268		36,207		2,470,065
Total investment securities available-for-sale	$	2,497,004	$	9,268	$	36,207	$	2,470,065

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	Investment Securities Held-to-Maturity
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
At September 30, 2019
Agency mortgage-backed securities	$	140,324	$	6,122	$	194	$	146,252
Corporate debt and trust preferred securities	3,676		—		—		3,676
Total investment securities held-to-maturity	$	144,000	$	6,122	$	194	$	149,928
At December 31, 2018
Agency mortgage-backed securities	$	146,052	$	1,460	$	1,045	$	146,467
Corporate debt and trust preferred securities	2,800		—		—		2,800
Total investment securities held-to-maturity	$	148,852	$	1,460	$	1,045	$	149,267

Gross unrealized losses and fair value of investment securities aggregated by investment category and the length of time the securities were in a continuous loss position were as follows: 

	At September 30, 2019
	Less than 12 months				12 months or more				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Investment securities available-for-sale
Debt securities:
Government and government sponsored enterprises	$	233,756	$	521	$	—	$	—	$	233,756	$	521
Obligations of states and political subdivisions	273,967		609		—		—		273,967		609
Mortgage-backed:
Agency mortgage-backed securities	241,408		1,479		210,896		2,848		452,304		4,327
Agency collateralized mortgage obligations	37,750		101		—		—		37,750		101
Non-agency collateralized mortgage obligations	152,895		570		—		—		152,895		570
Total mortgage-backed debt securities	432,053		2,150		210,896		2,848		642,949		4,998
Corporate debt and trust preferred securities	425		25		—		—		425		25
Total debt securities available-for-sale	940,201		3,305		210,896		2,848		1,151,097		6,153
Total investment securities available-for-sale	$	940,201	$	3,305	$	210,896	$	2,848	$	1,151,097	$	6,153
Investment securities held-to-maturity
Agency mortgage-backed securities	4,031		52		11,674		142		15,705		194
Total investment securities held-to-maturity	$	4,031	$	52	$	11,674	$	142	$	15,705	$	194

	At December 31, 2018
	Less than 12 months				12 months or more				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Investment securities carried at fair value
Debt securities:
Obligations of states and political subdivisions	$	3,620	$	—	$	526,817	$	9,479	$	530,437	$	9,479
Agency mortgage-backed securities	102,709		184		838,482		26,544		941,191		26,728
Total debt securities available-for-sale	106,329		184		1,365,299		36,023		1,471,628		36,207
Total investment securities available-for-sale	$	106,329	$	184	$	1,365,299	$	36,023	$	1,471,628	$	36,207
Investment securities held-to-maturity
Agency mortgage-backed securities	3,074		14		31,738		1,031		34,812		1,045
Total investment securities held-to-maturity	$	3,074	$	14	$	31,738	$	1,031	$	34,812	$	1,045

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At September 30, 2019 there were 1,056 investment securities in an unrealized loss position. We have assessed each investment security with unrealized losses for credit impairment. As part of that assessment we evaluated and concluded that it is more likely than not that we will not be required and do not intend to sell any of the investment securities prior to recovery of the amortized cost. Unrealized losses on investment securities were primarily due to changes in interest rates.

The gross gains and losses on sales of investment securities were as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Gross realized gains	$	7,717	$	—	$	10,872	$	—
Gross realized losses	1,849		—		3,491		—
Recoveries on previously impaired investment securities held-to-maturity	32		94		36		181
Net gains (losses) on investment securities	$	5,900	$	94	$	7,417	$	181

The amortized cost and fair value of investment securities by final contractual maturity were as follows. Securities with multiple maturity dates are classified in the period of final maturity. The final contractual maturities do not consider possible prepayments and therefore expected maturities may differ because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	At September 30, 2019				At December 31, 2018
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Investment Securities Available-for-Sale
Due in one year or less	$	60,739	$	60,652	$	—	$	—
Due in 1-5 years	199,777		199,399		24,464		24,375
Due in 5-10 years	483,336		492,755		509,832		503,768
Due after 10 years	4,750,770		4,827,029		1,962,708		1,941,922
Total investment securities available-for-sale	$	5,494,622	$	5,579,835	$	2,497,004	$	2,470,065
Investment Securities Held-to-Maturity
Due in 1-5 years	$	3,150	$	3,150	$	2,400	$	2,400
Due in 5-10 years	460		467		430		432
Due after 10 years	140,390		146,311		146,022		146,435
Total investment securities held-to-maturity	$	144,000	$	149,928	$	148,852	$	149,267

At September 30, 2019 and December 31, 2018, investment securities with a carrying value of $761.4 million and $1.6 million, respectively, were pledged as collateral to secure certain deposits and borrowings.

Note 7.  Loans and Leases

Loans and leases were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	10,810,534	$	6,220,632
Commercial real estate	8,876,779		2,908,313
Lease financing	2,594,373		2,530,163
Total commercial loan and lease portfolio	22,281,686		11,659,108
Consumer loan portfolio:
Residential mortgage	6,057,404		2,335,835
Consumer installment	1,562,252		2,003,572
Home equity	3,609,410		3,074,505
Total consumer loan portfolio	11,229,066		7,413,912
Total loans and leases(1)	$	33,510,752	$	19,073,020

(1) Loans and leases are reported at historical cost including net direct fees and costs associated with originating and acquiring loans and leases, lease residuals, unearned income and unamortized purchase premiums and discounts. The aggregate amount of loan and lease adjustments was a net deferred cost of $234.4 million and $1.5 million at September 30, 2019 and December 31, 2018, respectively.

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Acquired Loans and Leases TCF acquired loans and leases at fair value in the Merger and in previous acquisitions completed by Legacy TCF. Certain loans acquired were classified as PCI and are accounted for under ASC 310-30, which recognizes the expected shortfall of expected future cash flows, as compared to the contractual amount due, as nonaccretable difference. Any excess of the net present value of expected future cash flows over the acquisition date fair value is recognized as the accretable yield. The accretable yield is recognized over the expected remaining life of the acquired loan. In the event an acquired loan is renewed or extended, the loan continues to be accounted for as an acquired loan in accordance with ASC 310-30.

The carrying value and changes in accretable yield of all PCI loans were as follows:

	At or For the Three Months Ended September 30,						At or For the Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Balance of PCI loans, beginning of period	$	2,273		$	7,033		$	3,816		$	11,844
Accretable Yield
Balance, beginning of period	$	401		$	439		$	961		$	1,051
Addition attributable to the Merger	39,733			—			39,733			—
Accretion recognized in interest income	(4,312		)	(38		)	(5,015		)	(188		)
Net reclassification (to) from nonaccretable difference	(517		)	—			179			370
Payments received	(824		)	26			(1,377		)	(806		)
Balance, end of period	$	34,481		$	427		$	34,481		$	427
Balance of PCI loans, end of period	$	293,713		$	4,802		$	293,713		$	4,802

Leases Effective January 1, 2019, TCF adopted ASU No. 2016-02, Leases (Topic 842) and related ASUs on a modified retrospective basis, electing the practical expedients and optional transition method. As such, the following leasing disclosures include information at or for the three and nine months ended September 30, 2019.

The components of the net investment in direct financing and sales-type leases were as follows:

(In thousands)	At September 30, 2019
Carrying amount	$	2,682,097
Unguaranteed residual assets	148,669
Net direct fees and costs and unearned income	(236,393		)
Total net investment in direct financing and sales-type leases	$	2,594,373

The carrying amount of the direct financing and sales-type leases subject to residual value guarantees was $263.3 million at September 30, 2019.

The components of total lease income were as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Interest income - loans and leases:
Interest income on net investment in direct financing and sales-type leases	$	32,832	$	98,116
Leasing revenue (noninterest income):
Lease income from operating lease payments	25,444		76,140
Profit (loss) recorded on commencement date on sales-type leases	7,983		22,289
Gains (losses) on sales of leased equipment	6,163		18,603
Leasing revenue	39,590		117,032
Total lease income	$	72,422	$	215,148

Lease financing equipment depreciation on equipment leased to others was $19.4 million and $57.8 million for the three and nine months ended September 30, 2019, respectively. The net book value of equipment leased to others and related initial direct costs under operating leases was $285.4 million at September 30, 2019.

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Undiscounted future minimum lease payments receivable for direct financing and sales-type leases, and a reconciliation to the carrying amount recorded at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	51,851
2020	333,516
2021	459,359
2022	554,951
2023	563,752
Thereafter	612,063
Equipment under leases not yet commenced	47,948
Total undiscounted future minimum lease payments receivable for direct financing and sales-type leases	2,623,440
Third-party residual value guarantees	58,657
Total carrying amount of direct financing and sales-type leases	$	2,682,097

Undiscounted future minimum lease payments expected to be received for operating leases at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	20,087
2020	71,120
2021	48,885
2022	25,915
2023	9,777
Thereafter	4,717
Total undiscounted future minimum lease payments	$	180,501

Loan Sales The following table summarizes the net gains on sales of loans and leases. TCF retains servicing on a majority of loans sold. See Note 11. Loan Servicing Rights for further information.

	Three Months Ended September 30,						Nine Months Ended September 30,
(In millions)	2019			2018			2019			2018
Sale proceeds, net	$	472,800		$	410,389		$	1,066,576		$	940,134
Recorded investment in loans and leases sold, including accrued interest	458,697			393,078			1,033,961			911,218
Interest-only strips at initial value and other	(20,087		)	(8,809		)	(19,241		)	(4,016		)
Net (losses) gains on sales of loans and leases	$	(5,984	)	$	8,502		$	13,374		$	24,900

Interest-only strips related to loan sales were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Interest-only strips	$	14,078	$	16,835

TCF recorded $22 thousand and $43 thousand of impairment charges on interest-only strips during the three and nine months ended September 30, 2019, respectively, and $45 thousand and $0.7 million during the same periods in 2018.

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Note 8.  Allowance for Loan and Lease Losses and Credit Quality

Allowance for Loan and Lease Losses The rollforwards of the allowance for loan and lease losses were as follows:

(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	70,711		$	75,792		$	146,503
Charge-offs	(14,098		)	(21,449		)	(35,547		)
Recoveries	5,330			1,639			6,969
Net (charge-offs) recoveries	(8,768		)	(19,810		)	(28,578		)
Provision for credit losses	4,693			22,495			27,188
Other(1)	(23,849		)	(46		)	(23,895		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	91,241		$	74,378		$	165,619
Charge-offs	(15,942		)	(3,506		)	(19,448		)
Recoveries	11,711			947			12,658
Net (charge-offs) recoveries	(4,231		)	(2,559		)	(6,790		)
Provision for credit losses	(847		)	3,117			2,270
Other(1)	(299		)	(179		)	(478		)
Balance, end of period	$	85,864		$	74,757		$	160,621
(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	80,017		$	77,429		$	157,446
Charge-offs	(43,922		)	(37,122		)	(81,044		)
Recoveries	15,840			3,890			19,730
Net (charge-offs) recoveries	(28,082		)	(33,232		)	(61,314		)
Provision for credit losses	16,644			34,235			50,879
Other(1)	(25,792		)	(1		)	(25,793		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	98,085		$	72,956		$	171,041
Charge-offs	(48,120		)	(9,381		)	(57,501		)
Recoveries	21,299			2,491			23,790
Net (charge-offs) recoveries	(26,821		)	(6,890		)	(33,711		)
Provision for credit losses	18,872			9,002			27,874
Other(1)	(4,272		)	(311		)	(4,583		)
Balance, end of period	$	85,864		$	74,757		$	160,621

(1) Includes the transfer of the allowance for loan and lease losses to loans and leases held-for-sale (inclusive of the transfer of Legacy TCF auto loan portfolio for the three and nine months ended September 30, 2019).

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The allowance for loan and lease losses and loans and leases outstanding by type of allowance methodology were as follows:

	At September 30, 2019
(In thousands)	Consumer Loan Portfolio		Commercial Loan and Lease Portfolio		Total Loans and Leases
Allowance for loan and lease losses
Collectively evaluated for impairment	$	26,024	$	70,219	$	96,243
Individually evaluated for impairment	16,763		8,212		24,975
Total	$	42,787	$	78,431	$	121,218
Loans and leases outstanding
Collectively evaluated for impairment	$	11,016,429	$	21,956,151	$	32,972,580
Individually evaluated for impairment	132,900		111,559		244,459
PCI loans	79,737		213,976		293,713
Total	$	11,229,066	$	22,281,686	$	33,510,752

	At December 31, 2018
(In thousands)	Consumer Loan Portfolio		Commercial Loan and Lease Portfolio		Total Loans and Leases
Allowance for loan and lease losses
Collectively evaluated for impairment	$	57,113	$	68,140	$	125,253
Individually evaluated for impairment	22,904		9,289		32,193
Total	$	80,017	$	77,429	$	157,446
Loans and leases outstanding
Collectively evaluated for impairment	$	7,285,753	$	11,587,373	$	18,873,126
Individually evaluated for impairment	128,159		67,919		196,078
PCI loans	—		3,816		3,816
Total	$	7,413,912	$	11,659,108	$	19,073,020

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Accruing and Nonaccrual Loans and Leases TCF's key credit quality indicator is the receivable's payment performance status, defined as accruing or not accruing. Nonaccrual loans and leases are those which management believes have a higher risk of loss. Delinquent balances are determined based on the contractual terms of the loan or lease. Loans and leases that are over 90 days delinquent are a leading indicator for future charge-off trends and are generally placed on nonaccrual status. TCF's accruing and nonaccrual loans and leases were as follows:

(In thousands)	Current		30-89 Days  Delinquent  and Accruing		90 Days or More Delinquent  and Accruing		Total  Accruing		Nonaccrual		Total
At September 30, 2019
Commercial loan and lease portfolio:
Commercial and industrial	$	10,615,519	$	49,595	$	2,241	$	10,667,355	$	55,039	$	10,722,394
Commercial real estate	8,677,350		39,023		8,054		8,724,427		26,518		8,750,945
Lease financing	2,551,326		29,123		2,421		2,582,870		11,503		2,594,373
Total commercial loan and lease portfolio	21,844,195		117,741		12,716		21,974,652		93,060		22,067,712
Consumer loan portfolio:
Residential mortgage	5,919,947		14,533		886		5,935,366		48,816		5,984,182
Consumer installment	1,557,320		3,667		6		1,560,993		636		1,561,629
Home equity	3,550,652		13,569		—		3,564,221		39,296		3,603,517
Total consumer loan portfolio	11,027,919		31,769		892		11,060,580		88,748		11,149,328
PCI loans(1)	261,082		16,578		16,052		293,712		—		293,712
Total	$	33,133,196	$	166,088	$	29,660	$	33,328,944	$	181,808	$	33,510,752
At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	6,176,341	$	13,653	$	760	$	6,190,754	$	26,061	$	6,216,815
Commercial real estate	2,903,795		—		—		2,903,795		4,518		2,908,313
Lease financing	2,498,811		21,477		1,882		2,522,170		7,993		2,530,163
Total commercial loan and lease portfolio	11,578,947		35,130		2,642		11,616,719		38,572		11,655,291
Consumer loan portfolio:
Residential mortgage	2,291,435		10,014		1,275		2,302,724		33,111		2,335,835
Consumer installment	1,951,302		40,340		3,349		1,994,991		8,581		2,003,572
Home equity	3,042,968		5,883		—		3,048,851		25,654		3,074,505
Total consumer loan portfolio	7,285,705		56,237		4,624		7,346,566		67,346		7,413,912
PCI loans(1)	3,639		—		178		3,817		—		3,817
Total	$	18,868,291	$	91,367	$	7,444	$	18,967,102	$	105,918	$	19,073,020

(1) PCI loans that are not performing in accordance with contractual terms are not reported as nonaccrual because these loans were recorded at their net realizable value based on the principal and interest TCF expects to collect on these loans.

In addition to the receivables payment performance status, credit quality is also analyzed using risk categories, which vary based on the size and type of credit risk exposure and additionally measure liquidity, debt capacity, coverage and payment behavior as shown in the borrower's financial statements. The risk categories also measure the quality of the borrower's management and the repayment support offered by any guarantors. Loan and lease credit classifications are derived from standard regulatory rating definitions, which include: pass, special mention, substandard, doubtful and loss. Substandard and doubtful loans and leases have well-defined weaknesses, but may never result in a loss.

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The following schedule presents the recorded investment of loans and leases by credit risk categories.

(In thousands)	Pass		Special Mention		Substandard		Doubtful		Total
At September 30, 2019
Commercial loan and lease portfolio:
Commercial and industrial	$	10,307,229	$	309,440	$	193,865	$	—	$	10,810,534
Commercial real estate	8,645,910		150,132		80,737		—		8,876,779
Lease financing	2,540,637		27,007		26,729		—		2,594,373
Total commercial loan and lease portfolio	21,493,776		486,579		301,331		—		22,281,686
Consumer loan portfolio:
Residential mortgage	6,001,380		1,543		54,481		—		6,057,404
Consumer installment	1,561,506		—		746		—		1,562,252
Home equity	3,565,763		1,284		42,363		—		3,609,410
Total consumer loan portfolio	11,128,649		2,827		97,590		—		11,229,066
Total loans and leases	$	32,622,425	$	489,406	$	398,921	$	—	$	33,510,752
At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	5,955,713	$	158,296	$	106,623	$	—	$	6,220,632
Commercial real estate	2,869,711		12,864		25,738		—		2,908,313
Lease financing	2,480,964		25,195		24,004		—		2,530,163
Total commercial loan and lease portfolio	11,306,388		196,355		156,365		—		11,659,108
Consumer loan portfolio:
Residential mortgage	2,294,740		3,606		37,489		—		2,335,835
Consumer installment	1,981,844		1,302		20,426		—		2,003,572
Home equity	3,043,296		3,747		27,462		—		3,074,505
Total consumer loan portfolio	7,319,880		8,655		85,377		—		7,413,912
Total loans and leases	$	18,626,268	$	205,010	$	241,742	$	—	$	19,073,020

Troubled Debt Restructurings In certain circumstances, TCF may consider modifying the terms of a loan for economic or legal reasons related to the customer's financial difficulties. If TCF grants a concession, the modified loan is classified as a troubled debt restructuring ("TDR"). TDRs typically involve a deferral of the principal balance of the loan, a reduction of the stated interest rate of the loan or, in certain limited circumstances, a reduction of the principal balance of the loan or the loan's accrued interest. All loans classified as TDR loans are considered to be impaired.

The following table presents the recorded investment of loan modifications first classified as TDRs during the periods presented:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2018				2019				2018
(In thousands)	Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment
Commercial loan and lease portfolio:
Commercial and industrial	$	—	$	—	$	11	$	11	$	—	$	—	$	11	$	11
Commercial real estate	—		—		—		—		31,518		31,518		5,228		5,228
Total commercial loan and lease portfolio	—		—		11		11		31,518		31,518		5,239		5,239
Consumer loan portfolio:
Residential mortgage	1,724		1,723		2,132		2,119		4,023		4,016		4,385		4,315
Home equity	1,115		1,115		983		983		3,589		3,577		1,792		1,790
Total consumer loan portfolio	2,839		2,838		3,115		3,102		7,612		7,593		6,177		6,105
Total	$	2,839	$	2,838	$	3,126	$	3,113	$	39,130	$	39,111	$	11,416	$	11,344

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The following table presents TDR loans:

	At September 30, 2019						At December 31, 2018
(In thousands)	Accruing TDR Loans		Nonaccrual TDR Loans		Total TDR Loans		Accruing TDR Loans		Nonaccrual TDR Loans		Total TDR Loans
Commercial loan and lease portfolio	$	10,068	$	1,953	$	12,021	$	12,665	$	6,153	$	18,818
Consumer loan portfolio	75,836		19,284		95,120		85,794		22,554		108,348
Total	$	85,904	$	21,237	$	107,141	$	98,459	$	28,707	$	127,166

Commitments to lend additional funds to borrowers whose terms have been modified in TDRs were $0.5 million and $0.6 million at September 30, 2019 and December 31, 2018, respectively.

Loan modifications to troubled borrowers are no longer disclosed as TDR loans in the calendar years after modification if the loans were modified to an interest rate equal to or greater than the yields of new loan originations with comparable risk at the time of restructuring and if the loan is performing based on the restructured terms; however, these loans are still considered impaired and follow TCF's impaired loan reserve policies.

The following table summarizes the TDR loans that defaulted during the periods presented that were modified during the respective reporting period or within one year of the beginning of the respective reporting period. TCF considers a loan to have defaulted when under the modified terms it becomes 90 or more days delinquent, has been transferred to nonaccrual status, has been charged down or has been transferred to other real estate owned or repossessed and returned assets.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Defaulted TDR loan balances modified during the applicable period
Commercial loan and lease portfolio:
Commercial and industrial	$	—	$	87	$	297	$	4,784
Total commercial loan and lease portfolio	—		87		297		4,784
Consumer loan portfolio:
Residential mortgage	212		778		964		2,556
Consumer installment	452		217		1,555		950
Home equity	82		176		328		435
Total consumer loan portfolio	746		1,171		2,847		3,941
Defaulted TDR loan balances	$	746	$	1,258	$	3,144	$	8,725

Impaired Loans and Leases  Effective January 1, 2019, in conjunction with the adoption of ASU No. 2016-02, Leases (Topic 842) and related ASUs, TCF considers impaired loans and leases to include nonaccrual commercial loans and leases, as well as all commercial and consumer TDR loans. Previously, TCF did not include impaired leases within the following tables. For purposes of this disclosure, PCI loans have been excluded. In the following table, the balance of impaired loans and leases represents the amount recorded within loans and leases on the Consolidated Statements of Financial Condition, whereas the unpaid contractual balance represents the balances legally owed by the borrowers.

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Information on impaired loans and leases at September 30, 2019 and information on impaired loans at December 31, 2018 was as follows:

	At September 30, 2019						At December 31, 2018
(In thousands)	Unpaid Contractual Balance		Loan and Lease Balance		Related Allowance Recorded		Unpaid Contractual Balance		Loan Balance		Related Allowance Recorded
Impaired loans and leases with an allowance recorded:
Commercial loan and lease portfolio:
Commercial and industrial	$	27,748	$	24,775	$	5,151	$	35,444	$	32,326	$	6,354
Commercial real estate	4,257		3,922		330		4,905		4,474		1,108
Lease financing	11,503		11,503		2,731		—		—		—
Total commercial loan and lease portfolio	43,508		40,200		8,212		40,349		36,800		7,462
Consumer loan portfolio:
Residential mortgage	81,658		78,247		13,630		63,004		60,172		17,216
Consumer installment	—		—		—		919		647		81
Home equity	30,584		29,228		2,916		27,386		25,836		5,288
Total consumer loan portfolio	112,242		107,475		16,546		91,309		86,655		22,585
Total impaired loans and leases with an allowance recorded	155,750		147,675		24,758		131,658		123,455		30,047
Impaired loans and leases without an allowance recorded:
Commercial loan and lease portfolio:
Commercial and industrial	56,284		36,409		—		2,239		2,237		—
Commercial real estate	63,069		34,950		—		4,275		4,208		—
Total commercial loan and lease portfolio	119,353		71,359		—		6,514		6,445		—
Consumer loan portfolio:
Residential mortgage	27,420		19,370		—		11,636		9,494		—
Consumer installment	1,878		635		—		15,400		10,770		—
Home equity	16,771		5,420		—		10,620		1,429		—
Total consumer loan portfolio	46,069		25,425		—		37,656		21,693		—
Total impaired loans and leases without an allowance recorded	165,422		96,784		—		44,170		28,138		—
Total impaired loans and leases	$	321,172	$	244,459	$	24,758	$	175,828	$	151,593	$	30,047

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The average balance of impaired loans and leases and interest income recognized on impaired loans and leases and the average loan balance of impaired loans and interest income recognized on impaired loans were as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2018				2019				2018
(In thousands)	Average Loan and Lease Balance		Interest Income Recognized		Average Loan Balance		Interest Income Recognized		Average Loan and Lease Balance		Interest Income Recognized		Average Loan Balance		Interest Income Recognized
Impaired loans and leases with an allowance recorded
Commercial loan and lease portfolio:
Commercial and industrial	$	22,845	$	3	$	22,917	$	49	$	28,551	$	32	$	15,213	$	251
Commercial real estate	4,175		51		5,192		—		4,198		120		5,929		—
Lease financing	12,195		55		—		—		5,751		117		8,552		—
Total commercial loan and lease portfolio	39,215		109		28,109		49		38,500		269		29,694		251
Consumer loan portfolio:
Residential mortgage	77,852		770		60,737		380		69,209		1,864		69,268		1,221
Consumer installment	289		—		454		—		324		—		713		—
Home equity	30,225		94		26,462		301		27,532		681		29,583		1,326
Total consumer loan portfolio	108,366		864		87,653		681		97,065		2,545		99,564		2,547
Total impaired loans and leases with an allowance recorded	$	147,581	$	973	$	115,762	$	730	$	135,565	$	2,814	$	129,258	$	2,798
Impaired loans and leases without an allowance recorded
Commercial loan and lease portfolio:
Commercial and industrial	$	20,448	$	37	$	403	$	31	$	19,323	$	129	$	1,510	$	136
Commercial real estate	39,222		437		4,315		58		19,579		1,087		4,385		174
Lease financing	—		—		—		—		—		—		—		—
Total commercial loan and lease portfolio	59,670		474		4,718		89		38,902		1,216		5,895		310
Consumer loan portfolio:
Residential mortgage	12,609		121		9,982		160		14,431		450		10,013		502
Consumer installment	6,476		83		8,757		77		5,703		256		8,630		211
Home equity	3,551		23		1,683		55		3,425		110		1,648		177
Total consumer loan portfolio	22,636		227		20,422		292		23,559		816		20,291		890
Total impaired loans and leases without an allowance recorded	82,306		701		25,140		381		62,461		2,032		26,186		1,200
Total impaired loans and leases	$	229,887	$	1,674	$	140,902	$	1,111	$	198,026	$	4,846	$	155,444	$	3,998

Other Real Estate Owned and Repossessed and Returned Assets Other real estate owned and repossessed and returned assets were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Other real estate owned	$	27,638	$	17,403
Repossessed and returned assets	14,598		14,574
Consumer loans in process of foreclosure	15,509		15,540

On August 1, 2019, TCF acquired $14.6 million of other real estate owned and $0.3 million of repossessed and returned assets in connection with the Merger. Other real estate owned and repossessed and returned assets were written down $2.3 million and $5.5 million during the three and nine months ended September 30, 2019, respectively, and $0.7 million and $2.7 million during the same periods in 2018, included in other assets on the Consolidated Statements of Financial Condition.

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Note 9. Premises and Equipment, Net

Premises and equipment, net were as follows:

(In thousands)	At September 30, 2019			At December 31, 2018
Land	$	156,380		$	144,754
Office buildings	345,663			268,495
Leasehold improvements	57,274			51,868
Furniture, equipment and computer software	450,739			404,743
Premises and equipment leased under capital leases	3,180			3,180
Subtotal	1,013,236			873,040
Less: Accumulated depreciation and amortization	(459,042		)	(445,506		)
Premises and equipment, net	$	554,194		$	427,534

Depreciation and amortization expense related to premises and equipment was $14.9 million and $52.1 million for the three and nine months ended September 30, 2019, respectively, and $12.6 million and $36.0 million for the same periods in 2018.

Note 10. Other Intangible Assets

The following table sets forth the carrying amount and accumulated amortization of intangible assets that are amortizable and arose from business combinations or other acquisitions.

(In thousands)	Core deposit intangibles			Program agreements			Non-compete agreements			Customer relationships			Total
At September 30, 2019
Gross carrying value	$	180,837		$	14,700		$	9,250		$	24,380		$	229,167
Accumulated amortization	(6,372		)	(868		)	(5,334		)	(683		)	(13,257		)
Net carrying amount	$	174,465		$	13,832		$	3,916		$	23,697		$	215,910
At December 31, 2018
Gross carrying value	$	3,049		$	14,700		$	9,250		$	2,000		$	28,999
Accumulated amortization	(2,502		)	(408		)	(3,643		)	(1,950		)	(8,503		)
Net carrying amount	$	547		$	14,292		$	5,607		$	50		$	20,496

Amortization expense recognized on intangible assets was $4.5 million and $6.2 million for the three and nine months ended September 30, 2019, respectively, and $0.9 million and $2.6 million for the same periods in 2018.

Estimated amortization expense for the remainder of 2019 through 2023 is as follows:

(In thousands)	Total
Remainder of 2019	$	9,509
2020	27,393
2021	24,892
2022	22,531
2023	20,762

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Note 11. Loan Servicing Rights

Information regarding LSRs was as follows:

(Dollars in thousands)	At or For the Three Months Ended September 30, 2019			At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	18		$	23
Acquired in the Merger	59,567			59,567
New servicing assets created	1,906			1,906
Impairment (charge) recovery	(4,520		)	(4,520		)
Amortization	(1,670		)	(1,675		)
Balance, end of period	$	55,301		$	55,301
Valuation allowance, end of period	$	(4,520	)	$	(4,520	)
Loans serviced for others that have servicing rights capitalized, end of period	$	6,647,153		$	6,647,153

LSRs are stratified into relatively homogeneous pools based on products with similar characteristics.

Total loan servicing, late fee and other ancillary fee income, included in servicing fee income, related to loans serviced for others that have servicing rights capitalized was $2.8 million for both the three and nine months ended September 30, 2019.

Note 12. Operating Lease Right-of-Use Assets and Liabilities

Operating lease right-of-use assets, included in other assets, were $114.2 million at September 30, 2019. Operating lease liabilities, included in accrued expenses and other liabilities, were $135.1 million at September 30, 2019. In connection with the Merger, TCF recorded $39.8 million and $41.6 million of operating lease right-of-use assets and operating lease liabilities, respectively. Undiscounted future minimum operating lease payments and a reconciliation to the amount recorded as operating lease liabilities at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	9,137
2020	32,687
2021	23,902
2022	18,624
2023	15,807
Thereafter	48,737
Total undiscounted future minimum operating lease payments	148,894
Discount	(13,751		)
Total operating lease liabilities	$	135,143

As of September 30, 2019, TCF had approximately $250.1 million in additional leases for real property that have not yet commenced and are excluded from the operating lease liability table above. Of this amount, $231.7 million was related to a lease agreement for TCF Financial's new headquarters building in Detroit, Michigan signed on May 31, 2019 by Legacy Chemical, with an organization 50% owned by indirect related parties. The new headquarter lease has a term of 22.5 years commencing January 1, 2022 with renewal options.

The weighted-average discount rate and remaining lease term for operating leases were as follows:

	At September 30, 2019
Weighted-average discount rate	2.66	%
Weighted-average remaining lease term (years)	6.6

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The components of total lease cost for operating leases, included in occupancy and equipment noninterest expense, were as follows:

	Three Months Ended			Nine Months Ended
(In thousands)	September 30, 2019
Lease expense	$	10,367		$	28,488
Short-term and variable lease cost	241			332
Sublease income	(447		)	(1,189		)
Total lease cost for operating leases	$	10,161		$	27,631

Supplemental cash flow information related to operating leases was as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	395	$	118,100
Cash paid for amounts included in the measurement of lease liabilities - operating	8,807		23,841

Note 13. Investments in Qualified Affordable Housing Projects, Federal Historical Projects and New Market Tax Credits

TCF invests in qualified affordable housing projects, federal historical projects, and new market tax credits for the purposes of community reinvestment and to obtain tax credits. Return on TCF's investment in these projects comes in the form of pass through tax credits and tax losses. The carrying value of the investments is included in other assets. TCF primarily utilizes the proportional amortization method to account for investments in qualified affordable housing projects and the equity method to account for investments in other tax credit projects.

Under the proportional amortization method, TCF amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. TCF recognized amortization expense of investments in qualified affordable housing projects of $3.6 million and $8.5 million for the three and nine months ended September 30, 2019, respectively, and $2.4 million and $7.2 million for the three and nine months ended September 30, 2018, respectively. Amortization expense was offset by tax credits and other benefits of $4.5 million and $10.5 million for the three and nine months ended September 30, 2019, respectively, and $2.9 million and $8.5 million for the three and nine months ended September 30, 2018, respectively. TCF's remaining investment in qualified affordable housing projects totaled $231.4 million at September 30, 2019 and $90.9 million at December 31, 2018.

Under the equity method, TCF's share of the earnings or losses is included in other noninterest expense. TCF's remaining investment in federal historical projects, all of which were acquired in the Merger, totaled $38.5 million at September 30, 2019.

TCF's unfunded equity contributions relating to investments in qualified affordable housing projects, federal historical projects and new market tax credits are included in other liabilities. TCF's remaining unfunded equity contributions totaled $128.1 million at September 30, 2019 and $56.2 million at December 31, 2018.

Management analyzes these investments for potential impairment when events or changes in circumstances indicate that it is more-likely-than-not that the carrying amount of the investment will not be realized. An impairment loss is measured as the amount by which the carrying amount of an investment exceeds its fair value.

Investments in qualified affordable housing projects, federal historical projects and new market tax credits are considered VIEs because TCF, as a limited partner, lacks the power to direct the activities that most significantly impact the entities' economic performance. TCF has concluded it is not the primary beneficiary and therefore, they are not consolidated. The maximum exposure to loss on the VIE investments is limited to the carrying amount of the investments and the potential recapture of any recognized tax credits. TCF believes the likelihood of the tax credits being recaptured is remote, as a loss would require the managing entity to fail to meet certain government compliance requirements. Further, certain of TCF's investments in affordable housing limited liability entities include guaranteed minimum returns which are backed by an investment grade credit-rated company, which reduces the risk of loss.

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Note 14. Deposits

Deposits were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Checking:
Noninterest-bearing	$	7,959,455	$	3,921,710
Interest-bearing	6,260,136		2,452,954
Total checking	14,219,591		6,374,664
Savings	8,362,170		6,122,257
Money market	3,621,729		1,193,782
Certificates of deposit	6,949,082		3,797,241
Brokered deposits	2,133,502		1,415,742
Total deposits	$	35,286,074	$	18,903,686

Excluded from total deposits are account overdrafts which have been classified as loans. At September 30, 2019 and December 31, 2018, overdrafts totaled $18.4 million and $9.6 million, respectively.

Scheduled maturities for certificates of deposits, including Certificate of Deposit Account Registry Service ("CDARS") deposits, IRA deposits and other brokered funds at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	4,813,249
2020	3,138,314
2021	266,425
2022	97,139
2023	40,823
Thereafter	30,022

The aggregate amount of certificates of deposit with balances equal to or greater than the Federal Deposit Insurance Corporation ("FDIC") insurance limit of $250,000 was $3.0 billion at September 30, 2019 and $782.4 million at December 31, 2018.

Note 15. Borrowings

TCF Bank is a member of the FHLB, which provides short- and long-term funding collateralized by mortgage related assets to its members.

Collateralized Deposits include TCF Bank's Repurchase Investment Sweep Agreement product collateralized by mortgage-backed securities, and funds deposited by customers that are collateralized by investment securities owned by TCF Bank, as these deposits are not covered by FDIC insurance.

Short-term borrowings (borrowings with an original maturity of less than one year) were as follows:

	At September 30, 2019				At December 31, 2018
(Dollars in thousands)	Amount		Weighted-average Rate		Amount		Weighted-average Rate
FHLB advances	$	2,335,960	1.63	%	$	—	—	%
Collateralized Deposits	271,340		1.00		—		—
Total short-term borrowings	$	2,607,300	1.56		$	—	—

On August 5, 2019, TCF Financial entered into a $50.0 million unsecured 364-day revolving credit facility bearing interest at the then applicable Eurocurrency Rate plus 150 basis points, available to be used, as needed, to fund growth, common stock repurchases or other general corporate purposes. The revolving credit facility contains covenants related to certain thresholds that must be maintained related to various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on levels of indebtedness. TCF Financial had no outstanding balance under the revolving credit facility and was in compliance with all covenants at September 30, 2019.

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Long-term borrowings were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
FHLB advances	$	322,674	$	1,100,000
Subordinated debt obligations	430,178		253,391
Discounted lease rentals	104,571		92,976
Capital lease obligation	3,059		3,105
Total long-term borrowings	$	860,482	$	1,449,472

FHLB Advances As a result of the Merger, TCF assumed long-term FHLB advances of $322.7 million. These acquired long-term FHLB advances have maturity dates ranging from 2020 to 2025 and carried interest rates ranging from of 1.30% to 2.72% at September 30, 2019. FHLB advances are collateralized by residential mortgage and commercial real estate loans.

Subordinated Debt Obligations As a result of the Merger, TCF assumed subordinated debt securities totaling $19.0 million. Included in the obligations assumed in the Merger were $5.6 million of obligations due in 2032 with a carrying interest rate based on the three-month LIBOR plus 3.25% and $13.4 million of obligations due in 2034 and 2035 with carrying interest rates based on the three-month LIBOR plus 1.45% to 2.85%.

On July 2, 2019, TCF Bank issued $150.0 million of fixed-to-floating rate subordinated notes (the "2029 Notes") at par. The fixed-to-floating rate subordinated notes, due July 2, 2029, bear an initial interest rate of 4.13% per annum, payable semi-annually in arrears on January 2 and July 2, commencing on January 2, 2020. The 2029 Notes are redeemable at TCF Bank's option beginning on July 2, 2024. Effective July 2, 2024, the interest rate will reset quarterly to an annual interest rate equal to the then-current three-month LIBOR rate plus 237.5 basis points, payable quarterly in arrears on January 2, April 2, July 2 and October 2, commencing on October 2, 2024. TCF Bank incurred issuance costs of $1.5 million that are amortized as interest expense over the full term of the 2029 Notes using the effective interest method.

The contractual maturities of long-term borrowings at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	11,138
2020	150,274
2021	29,508
2022	126,721
2023	5,960
Thereafter	536,881
Total long-term borrowings	$	860,482

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Note 16.  Accumulated Other Comprehensive Income

The components of other comprehensive income (loss), reclassifications from accumulated other comprehensive income (loss) to various financial statement line items and the related tax effects were as follows:

	Three Months Ended September 30,
	2019									2018
(In thousands)	Before Tax			Tax Effect			Net of Tax			Before Tax			Tax Effect			Net of Tax
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips:
Net unrealized gains (losses) arising during the period	$	24,236		$	(5,606	)	$	18,630		$	(18,086	)	$	4,516		$	(13,570	)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss) to:
Total interest income	844			(205		)	639			263			(65		)	198
Net gains (losses) on investment securities	—			—			—			—			—			—
Other noninterest expense	(53		)	14			(39		)	(84		)	22			(62		)
Amounts reclassified from accumulated other comprehensive income (loss)	791			(191		)	600			179			(43		)	136
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips	25,027			(5,797		)	19,230			(17,907		)	4,473			(13,434		)
Recognized postretirement prior service cost:
Reclassification of amortization of prior service cost to other noninterest expense	(12		)	3			(9		)	(12		)	3			(9		)
Foreign currency translation adjustment(1)	(1,968		)	—			(1,968		)	2,899			—			2,899
Net unrealized gains (losses) on net investment hedges	2,170			(529		)	$	1,641		(2,537		)	633			(1,904		)
Total other comprehensive income (loss)	$	25,217		$	(6,323	)	$	18,894		$	(17,557	)	$	5,109		$	(12,448	)
	Nine Months Ended September 30,
	2019									2018
(In thousands)	Before Tax			Tax Effect			Net of Tax			Before Tax			Tax Effect			Net of Tax
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips:
Net unrealized gains (losses) arising during the period	$	114,263		$	(27,519	)	$	86,744		$	(62,521	)	$	15,688		$	(46,833	)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss) to:
Total interest income	2,495			(607		)	1,888			810			(202		)	608
Net gains (losses) on investment securities	(1,513		)	368			(1,145		)	—			—			—
Other noninterest expense	(350		)	86			(264		)	221			(55		)	166
Amounts reclassified from accumulated other comprehensive income (loss)	632			(153		)	479			1,031			(257		)	774
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips	114,895			(27,672		)	87,223			(61,490		)	15,431			(46,059		)
Recognized postretirement prior service cost:
Reclassification of amortization of prior service cost to other noninterest expense	(35		)	10			(25		)	(35		)	9			(26		)
Foreign currency translation adjustment(1)	5,014			—			5,014			(4,136		)	—			(4,136		)
Net unrealized gains (losses) on net investment hedges	(3,761		)	915			(2,846		)	4,637			(1,158		)	3,479
Total other comprehensive income (loss)	$	116,113		$	(26,747	)	$	89,366		$	(61,024	)	$	14,282		$	(46,742	)

(1) Foreign investments are deemed to be permanent in nature and, therefore, TCF does not provide for taxes on foreign currency translation adjustments.

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The components of accumulated other comprehensive income (loss) were as follows:

(In thousands)	Net Unrealized Gains (Losses) on Available-for-Sale Investment Securities and Interest-only Strips			Net Unrealized Gains (Losses) on Net Investment Hedges			Foreign Currency Translation Adjustment			Recognized Postretirement Prior Service Cost			Total
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	39,971		$	10,499		$	(13,229	)	$	93		$	37,334
Other comprehensive income (loss)	18,630			1,641			(1,968		)	—			18,303
Amounts reclassified from accumulated other comprehensive income (loss)	600			—			—			(9		)	591
Net other comprehensive income (loss)	19,230			1,641			(1,968		)	(9		)	18,894
Balance, end of period	$	59,201		$	12,140		$	(15,197	)	$	84		$	56,228
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	(48,978	)	$	9,919		$	(13,878	)	$	126		$	(52,811	)
Other comprehensive income (loss)	(13,570		)	(1,904		)	2,899			—			(12,575		)
Amounts reclassified from accumulated other comprehensive income (loss)	136			—			—			(9		)	127
Net other comprehensive income (loss)	(13,434		)	(1,904		)	2,899			(9		)	(12,448		)
Balance, end of period	$	(62,412	)	$	8,015		$	(10,979	)	$	117		$	(65,259	)
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	(28,022	)	$	14,986		$	(20,211	)	$	109		$	(33,138	)
Other comprehensive income (loss)	86,744			(2,846		)	5,014			—			88,912
Amounts reclassified from accumulated other comprehensive income (loss)	479			—			—			(25		)	454
Net other comprehensive income (loss)	87,223			(2,846		)	5,014			(25		)	89,366
Balance, end of period	$	59,201		$	12,140		$	(15,197	)	$	84		$	56,228
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	(16,353	)	$	4,536		$	(6,843	)	$	143		$	(18,517	)
Other comprehensive income (loss)	(46,833		)	3,479			(4,136		)	—			(47,490		)
Amounts reclassified from accumulated other comprehensive income (loss)	774			—			—			(26		)	748
Net other comprehensive income (loss)	(46,059		)	3,479			(4,136		)	(26		)	(46,742		)
Balance, end of period	$	(62,412	)	$	8,015		$	(10,979	)	$	117		$	(65,259	)

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Note 17.  Regulatory Capital Requirements

TCF and TCF Bank are subject to minimum capital requirements administered by the federal banking regulators. Failure to meet minimum capital requirements can initiate certain mandatory, and possible additional discretionary, actions by the federal banking regulators that could have a material adverse effect on TCF. In general, TCF Bank may not declare or pay a dividend to TCF in excess of 100% of its net retained earnings for the current year combined with its net retained earnings for the preceding two calendar years, which was $296.6 million at September 30, 2019, without prior approval of the Office of the Comptroller of the Currency ("OCC"). The OCC also has the authority to prohibit the payment of dividends by a national bank when it determines such payments would constitute an unsafe and unsound banking practice. TCF Bank's ability to make capital distributions in the future may require regulatory approval and may be restricted by its federal banking regulators. TCF Bank's ability to make any such distributions will also depend on its earnings and ability to meet minimum regulatory capital requirements in effect during future periods. In the future, these capital adequacy standards may be higher than existing minimum regulatory capital requirements.

Regulatory capital information for TCF and TCF Bank was as follows:

	TCF						TCF Bank
	At September 30,			At December 31,			At September 30,			At December 31,			Well-capitalized Standard under Prompt Corrective Action Provisions		Minimum Capital Requirement for Capital Adequacy Plus Conservation Buffer
(Dollars in thousands)	2019			2018			2019			2018
Regulatory Capital:
Common equity Tier 1 capital	$	4,009,214		$	2,224,183		$	3,991,895		$	2,282,013
Tier 1 capital	4,197,706			2,408,393			4,015,208			2,300,472
Total capital	4,652,708			2,750,581			4,487,968			2,675,347
Regulatory Capital Ratios:
Common equity Tier 1 capital ratio	10.88		%	10.82		%	10.85		%	11.10		%	6.50	%	7.00	%
Tier 1 risk-based capital ratio	11.40			11.72			10.91			11.19			8.00		8.50
Total risk-based capital ratio	12.63			13.38			12.20			13.01			10.00		10.50
Tier 1 leverage ratio	11.16			10.44			10.68			9.97			5.00		4.00

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Note 18.  Derivative Instruments

Derivatives Designated as Hedging Instruments TCF entered into an interest rate contract (interest rate swap agreement) in February 2015 related to its contemporaneously issued subordinated debt, which settles through a central clearing house. The swap was designated as a fair value hedge and effectively converts the fixed interest rate to a floating rate based on the three-month LIBOR plus a fixed number of basis points on the $150.0 million notional amount through February 27, 2025, the maturity date of the subordinated debt.

The interest rate swap substantially offsets the change in fair value of the hedged underlying subordinated debt that is attributable to the changes in market risk. The gains and losses related to changes in the fair value of the interest rate swap, as well as the offsetting changes in fair value of the hedged debt, are recorded in interest expense.

Forward foreign exchange contracts, which generally settle within 34 days, are used to manage the foreign exchange risk associated with TCF's net investment in TCF Commercial Finance Canada, Inc., a wholly-owned indirect Canadian subsidiary of TCF Bank. These forward foreign exchange contracts have been designated as net investment hedges. Changes in net investment hedges recorded within other comprehensive income (loss) are subsequently reclassified to noninterest expense during the period in which the foreign investment is substantially liquidated or when other elements of the currency translation adjustment are reclassified to income.

Derivatives Not Designated as Hedges TCF executes interest rate contracts with commercial banking customers to facilitate their respective risk management strategies. Those interest rate contracts are simultaneously hedged with offsetting interest rate contracts that TCF executes with a third party and generally settles through a central clearing house, minimizing TCF's net risk exposure. As the interest rate contracts do not meet hedge accounting requirements, changes in the fair value of both the customer contracts and the offsetting contracts are recorded in other noninterest income. These contracts have original fixed maturity dates ranging from 27 days to 16 years.

TCF executes its forward foreign exchange contracts in the over-the-counter market with large financial institutions pursuant to International Swaps and Derivatives Association, Inc. agreements. These agreements include credit risk-related features that enhance the creditworthiness of these instruments, as compared with other obligations of the respective counterparty with whom TCF has transacted, by requiring that additional collateral be posted under certain circumstances. The amount of collateral required depends on the contract and is determined daily based on market and currency exchange rate conditions. Changes in the fair value of these forward foreign exchange contracts are recorded in other noninterest expense.

TCF enters into interest rate lock commitments in conjunction with the sale of certain consumer real estate loans. These interest rate lock commitments are agreements to extend credit under certain specified terms and conditions at fixed rates with original lock expirations generally within three months. They are not designated as hedges and accordingly, changes in the valuation of these commitments are recorded in net (losses) gains on sales of loans and leases.

Residential mortgage loan commitments, forward loan sales commitments, are generally entered into at the time interest rate locks are accepted to protect the value of the mortgage loans from increases in market interest rates during the period held and are generally settled with the investor in the secondary market within 90 days after entering into the forward commitment. Certain forward loan commitments are accounted for as derivatives and recorded at fair value, with changes in fair value recorded through earnings. In the normal course of business, TCF may decide to settle a forward contract rather than fulfill the contract. Cash received or paid in this settlement manner is recorded in net (losses) gains on sales of loans and leases in the Consolidated Statements of Income and is considered a cost of executing a forward contract.

Power Equity CDs are time deposits that provide the purchaser a guaranteed return of principal at maturity plus a potential equity return (a written option), while TCF receives a known stream of funds based on the equity return (a purchased option). The written and purchased options are mirror derivative instruments which are carried at fair value. Power Equity CDs include written and purchased option derivatives consisting of instruments to facilitate an equity-linked time deposit product.

TCF's swap agreement is related to the sale of TCF's Visa Class B stock. The fair value of the swap agreement is based on TCF's estimated exposure related to the Visa covered litigation through a probability analysis of the funding and estimated settlement amounts. Changes, if any, in the valuation of this swap agreement, which has no determinable maturity date, are recorded in other noninterest expense.

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Derivative instruments, recognized at fair value within other assets or other liabilities were as follows:

	At September 30, 2019
			Fair Value
(In thousands)	Notional Amount(1)		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments
Interest rate contract	$	150,000	$	—		$	11
Forward foreign exchange contracts	171,075		1,252			—
Total derivatives designated as hedging instruments	$	321,075	$	1,252		$	11
Derivatives not designated as hedging instruments
Interest rate contracts	$	4,694,964	$	130,391		$	101,899
Forward foreign exchange contracts	291,999		414			315
Interest rate lock commitments	266,949		4,554			113
Forward loan sales commitments	218,061		166			253
Power Equity CDs	31,870		617			617
Swap agreement	12,644		—			356
Total derivatives not designated as hedging instruments	$	5,516,487	$	136,142		$	103,553
Total derivatives before netting	$	5,837,562	137,394			103,564
Netting(2)			(2,152		)	(93,785		)
Total derivatives, net			$	135,242		$	9,779

	At December 31, 2018
			Fair Value
(In thousands)	Notional Amount(1)		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments
Interest rate contract	$	150,000	$	393		$	—
Forward foreign exchange contracts	157,271		2,980			—
Total derivatives designated as hedging instruments	$	307,271	$	3,373		$	—
Derivatives not designated as hedging instruments
Interest rate contracts	$	1,095,449	$	7,516		$	3,732
Forward foreign exchange contracts	254,274		3,709			13
Interest rate lock commitments	28,007		652			28
Swap agreement	13,020		—			583
Total derivatives not designated as hedging instruments	$	1,390,750	$	11,877		$	4,356
Total derivatives before netting			15,250			4,356
Netting(2)			(6,982		)	(991		)
Total derivatives, net			$	8,268		$	3,365

(1) Notional or contract amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the Consolidated Statements of Financial Condition.

(2) Includes netting of derivative asset and liability balances and related cash collateral, where counterparty netting agreements are in place.

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Derivative instruments may be subject to master netting arrangements and collateral arrangements and qualify for offset in the Consolidated Statements of Financial Condition. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. Derivative instruments subject to master netting arrangements and collateral arrangements are recognized on a net basis in the Consolidated Statements of Financial Condition. The gross amounts recognized, gross amounts offset and net amount presented of derivative instruments were as follows:

	At September 30, 2019
(In thousands)	Gross Amounts Recognized		Gross Amounts  Offset(1)			Net Amount Presented
Derivative assets
Interest rate contracts	$	130,391	$	(312	)	$	130,079
Forward foreign exchange contracts	1,666		(1,666		)	—
Interest rate lock commitments	4,554		(8		)	4,546
Forward loan sales commitments	166		(166		)	—
Power Equity CDs	617		—			617
Total derivative assets	$	137,394	$	(2,152	)	$	135,242
Derivative liabilities
Interest rate contracts	$	101,910	$	(93,099	)	$	8,811
Forward foreign exchange contracts	315		(156		)	159
Interest rate lock commitments	113		(8		)	105
Forward loan sales commitments	253		(166		)	87
Power Equity CDs	617		—			617
Other contracts	356		(356		)	—
Total derivative liabilities	$	103,564	$	(93,785	)	$	9,779

	At December 31, 2018
(In thousands)	Gross Amounts Recognized		Gross Amounts Offset(1)			Net Amount Presented
Derivative assets
Interest rate contracts	$	7,909	$	(395	)	$	7,514
Forward foreign exchange contracts	6,689		(6,587		)	102
Interest rate lock commitments	652		—			652
Total derivative assets	$	15,250	$	(6,982	)	$	8,268
Derivative liabilities
Interest rate contracts	$	3,732	$	(395	)	$	3,337
Forward foreign exchange contracts	13		(13		)	—
Interest rate lock commitments	28		—			28
Swap agreement	583		(583		)	—
Total derivative liabilities	$	4,356	$	(991	)	$	3,365

(1) Includes the amounts with counterparties subject to enforceable master netting arrangements that have been offset in the Consolidated Statements of Financial Condition.

Derivatives Designated as Hedging Instruments

Interest rate contract The carrying amount of the hedged subordinated debt, including the cumulative basis adjustment related to the application of fair value hedge accounting, is recorded in long-term borrowings on the Consolidated Statements of Financial Condition and was as follows:

	Carrying Amount  of the Hedged Liability				Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Liability
(In thousands)	At September 30, 2019		At December 31, 2018		At September 30, 2019		At December 31, 2018
Subordinated bank note - 2025	$	153,307	$	144,296	$	4,682	$	(4,165	)

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The following table summarizes the effect of fair value hedge accounting on the Consolidated Statements of Income for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Statement of income line where the gain (loss) on the fair value hedge was recorded:
Interest expense on borrowings	$	17,115		$	10,726		$	48,050		$	31,850
Gain (loss) on interest rate contract (fair value hedge)
Hedged item	$	(2,100	)	$	1,206		$	(8,847	)	$	6,337
Derivative designated as a hedging instrument	2,195			(1,165		)	8,938			(6,621		)
Net income (expense) recognized on fair value hedge in interest expense on borrowings	$	95		$	41		$	91		$	(284	)

Forward foreign exchange contracts The effect of net investment hedges on accumulated other comprehensive income was as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands)	2019		2018			2019			2018
Forward foreign exchange contracts	$	2,170	$	(2,537	)	$	(3,761	)	$	4,637

Derivatives Not Designated as Hedging Instruments Certain other interest rate contracts, forward foreign exchange contracts, interest rate lock commitments, Power Equity CDs and other contracts have not been designated as hedging instruments. The effect of these derivatives on the Consolidated Statements of Income was as follows:

		Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	Location of Gain (Loss)	2019			2018			2019			2018
Interest rate contracts(1)	Other noninterest income	$	(19,764	)	$	51		$	(21,307	)	$	157
Forward foreign exchange contracts	Other noninterest expense	3,307			(3,706		)	(5,302		)	8,050
Interest rate lock commitments	Net (losses) gains on sales of loans and leases	337			(244		)	1,117			798
Forward loan sales commitments	Net (losses) gains on sales of loans and leases	(11		)	—			(11		)	—
Swap agreement	Other noninterest income	4			(292		)	4			(274		)
Net gain (loss) recognized		$	(16,127	)	$	(4,191	)	$	(25,499	)	$	8,731

(1) Included in both the three and nine months ended September 30, 2019 is a loss of $17.3 million related to the termination of $1.1 billion of interest rate swaps.

At September 30, 2019 and December 31, 2018, credit risk-related contingent features existed on forward foreign exchange contracts with a notional value of $30.2 million and $25.7 million, respectively. In the event TCF is rated less than BB- by Standard and Poor's, the contracts could be terminated or TCF may be required to provide approximately $0.6 million and $0.5 million in additional collateral at September 30, 2019 and December 31, 2018, respectively. There were no forward foreign exchange contracts containing credit risk-related features in a liability position at both September 30, 2019 and December 31, 2018.

At September 30, 2019, TCF had posted $58.1 million and $0.1 million of cash collateral related to its interest rate contracts and forward foreign exchange contracts, respectively, and received $1.9 million of cash collateral related to its forward foreign exchange contracts.

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Note 19.  Fair Value Measurements

TCF uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Fair values are based on the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Investment securities carried at fair value, certain loans held for sale, interest-only strips, derivative instruments, forward loan sales commitments and assets and liabilities held in trust for deferred compensation plans are recorded at fair value on a recurring basis. From time to time we may be required to record at fair value other assets on a non-recurring basis, such as certain investment securities held to maturity, loans and leases, goodwill, loan servicing rights, other intangible assets, other real estate owned, repossessed and returned assets or the securitization receivable. These non-recurring fair value adjustments typically involve application of lower of cost or fair value accounting or write-downs of individual assets.

TCF groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the degree and reliability of estimates and assumptions used to determine fair value. The levels are as follows:

Level 1 Valuations that are based on prices obtained from independent pricing sources for the same instruments traded in active markets.

Level 2 Valuations that are based on prices obtained from independent pricing sources that are based on observable transactions of similar instruments, but not quoted markets.

Level 3 Valuations generated from Corporation model-based techniques that use at least one significant unobservable inputs. Such unobservable inputs reflect estimates of assumptions that market participants would use in pricing the asset or liability.

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

Investment Securities Carried at Fair Value: The fair value of investment securities carried at fair value, categorized as Level 2, is recorded using prices obtained from independent asset pricing services that are based on observable transactions, but not quoted markets. Management reviews the prices obtained from independent asset pricing services for unusual fluctuations and comparisons to current market trading activity.

Loans Held-for-Sale: TCF has elected the fair value option for residential mortgage loans held-for-sale. Accordingly, the fair values of residential mortgage loans held-for-sale are based on valuation models that use the market price for similar loans sold in the secondary market. As these prices are derived from market observable inputs, TCF categorized as Level 2.

Interest-only Strips: The fair value of interest-only strips, categorized as Level 3, represents the present value of future cash flows expected to be received by TCF on certain assets. TCF uses available market data, along with its own empirical data and discounted cash flow models, to arrive at the fair value of its interest-only strips. The present value of the estimated expected future cash flows to be received is determined by using discount, loss and prepayment rates that TCF believes are commensurate with the risks associated with the cash flows and what a market participant would use. These assumptions are inherently subject to volatility and uncertainty and, as a result, the fair value of the interest-only strips may fluctuate significantly from period to period.

Derivative Instruments:

Interest Rate Contracts: TCF executes interest rate contracts as described in Note 18. The fair value of these interest rate contracts, categorized as Level 2, is determined using a cash flow model which may consider the forward curve, the discount curve, option volatilities and credit valuation adjustments related to counterparty and/or borrower non-performance risk.

Forward Foreign Exchange Contracts: TCF's forward foreign exchange contracts are recorded at fair value using a cash flow model that includes key inputs such as foreign exchange rates and an assessment of the risk of counterparty non-performance. The risk of counterparty non-performance is based on external assessments of credit risk. The fair value of these contracts, categorized as Level 2, is based on observable transactions, but not quoted markets.

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Interest Rate Lock Commitments: TCF's interest rate lock commitments are derivative instruments that are recorded at fair value based on valuation models that use the market price for similar loans sold in the secondary market. The interest rate lock commitments are adjusted for expectations of exercise and funding. As the prices are derived from market observable inputs, TCF categorized as Level 2.

Power Equity CDs: Power Equity CDs are categorized as Level 2, and determined using quoted prices of underlying stocks, along with other terms and features of the derivate instruments.

Swap Agreement: TCF's swap agreement, categorized as Level 3, is related to the sale of TCF's Visa Class B stock. The fair value of the swap agreement is based on TCF's estimated exposure related to the Visa covered litigation through a probability analysis of the funding and estimated settlement amounts.

Forward Loan Sales Commitments: TCF enters into forward loan sales commitments to sell certain mortgage loans which are recorded at fair value based on valuation models. TCF’s expectation of the amount of its interest rate lock commitments that will ultimately close is a factor in determining the position. The valuation models utilize the fair value of related mortgage loans determined using observable market data and therefore categorized as Level 2.

Assets and Liabilities Held in Trust for Deferred Compensation Plans: Assets held in trust for deferred compensation plans include investments in publicly traded securities, excluding TCF Financial common stock reported in treasury stock and other equity, and U.S. Treasury notes. The fair value of these assets, categorized as Level 1, is based on prices obtained from independent asset pricing services based on active markets. The fair value of the liabilities equals the fair value of the assets.

The balances of assets and liabilities measured at fair value on a recurring basis were as follows:

	September 30, 2019
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Investment securities carried at fair value	$	—	$	5,579,407	$	428	$	5,579,835
Loans held-for-sale	—		114,831		—		114,831
Interest-only strips	—		—		14,078		14,078
Derivative assets:(1)
Interest rate contracts	—		130,391		—		130,391
Forward foreign exchange contracts	—		1,666		—		1,666
Interest rate lock commitments	—		4,554		—		4,554
Forward loan sales commitments	—		166		—		166
Power Equity CDs	—		617		—		617
Total derivative assets	—		137,394		—		137,394
Forward loan sales commitments	—		404		—		404
Assets held in trust for deferred compensation plans	40,784		—		—		40,784
Total assets at fair value	$	40,784	$	5,832,036	$	14,506	$	5,887,326
Liabilities
Derivative liabilities:(1)
Interest rate contracts	$	—	$	101,910	$	—	$	101,910
Forward foreign exchange contracts	—		315		—		315
Interest rate lock commitments	—		113		—		113
Forward loan sales commitments	—		253		—		253
Power Equity CDs	—		617		—		617
Swap agreement	—		—		356		356
Total derivative liabilities	—		103,208		356		103,564
Forward loan sales commitments	—		284		—		284
Liabilities held in trust for deferred compensation plans	40,784		—		—		40,784
Total liabilities at fair value	$	40,784	$	103,492	$	356	$	144,632

(1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.

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	December 31, 2018
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Investment securities carried at fair value	$	—	$	2,470,061	$	4	$	2,470,065
Loans held-for-sale	—		—		18,070		18,070
Interest-only strips	—		—		16,835		16,835
Derivative assets:(1)
Interest rate contracts	—		7,909		—		7,909
Forward foreign exchange contracts	—		6,689		—		6,689
Interest rate lock commitments	—		—		652		652
Total derivative assets	—		14,598		652		15,250
Forward loan sales commitments	—		—		152		152
Assets held in trust for deferred compensation plans	33,217		—		—		33,217
Total assets at fair value	$	33,217	$	2,484,659	$	35,713	$	2,553,589
Liabilities
Derivative liabilities:(1)
Interest rate contracts	$	—	$	3,732	$	—	$	3,732
Forward foreign exchange contracts	—		13		—		13
Interest rate lock commitments	—		—		28		28
Swap agreement	—		—		583		583
Total derivative liabilities	—		3,745		611		4,356
Forward loan sales commitments	—		—		178		178
Liabilities held in trust for deferred compensation plans	33,217		—		—		33,217
Total liabilities at fair value	$	33,217	$	3,745	$	789	$	37,751

(1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.

Management assesses the appropriate classification of financial assets and liabilities within the fair value hierarchy by monitoring the level of available observable market information. Changes in markets or economic conditions, as well as changes to our valuation models, may require the transfer of financial instruments from one fair value level to another. Such transfers, if any, are recorded at the fair values as of the beginning of the quarter in which the transfers occurred.

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The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows:

(In thousands)	Investment securities carried at fair value			Loans held-for-sale			Interest-only strips			Interest rate lock commitments			Other derivative contracts			Forward loan sales commitments
At or For the Three Months Ended September 30, 2019
Asset (liability) balance, beginning of period	$	3		$	29,211		$	15,236		$	1,402		$	(435	)	$	(145	)
Transfers out of Level 3 (1)	—			(29,211		)	—			(1,402		)	—			145
Acquired through the Merger	450			—			—			—			—			—
Total net gains (losses) included in:
Net income	—			—			611			—			—			—
Other comprehensive income (loss)	(25		)	—			(65		)	—			—			—
Acquired	—			—			—			—			—			—
Originations	—			—			628			—			—			—
Principal paydowns / settlements	—			—			(2,332		)	—			79			—
Asset (liability) balance, end of period	$	428		$	—		$	14,078		$	—		$	(356	)	$	—
At or For the Three Months Ended September 30, 2018
Asset (liability) balance, beginning of period	$	4		$	18,554		$	19,887		$	858		$	(441	)	$	110
Total net gains (losses) included in:
Net income	—			(184		)	732			(242		)	(292		)	359
Other comprehensive income (loss)	—			—			246			—			—			—
Sales	—			(97,866		)	—			—			—			—
Originations	—			98,018			—			—			—			—
Principal paydowns / settlements	—			(3		)	(3,153		)	—			75			—
Asset (liability) balance, end of period	$	4		$	18,519		$	17,712		$	616		$	(658	)	$	469
At or For the Nine Months Ended September 30, 2019
Asset (liability) balance, beginning of period	$	4		$	18,070		$	16,835		$	624		$	(583	)	$	(26	)
Total net gains (losses) included in:
Acquired through the Merger	450			—			—			—			—			—
Net income	—			534			1,976			778			—			(119		)
Other comprehensive income (loss)	(25		)	—			246			—			—			—
Sales	—			(164,693		)	—			—			—			—
Originations	—			175,304			2,180			—			—			—
Principal paydowns / settlements	(1		)	(4		)	(7,159		)	—			227			—
Transfers out of Level 3 (1)	—			(29,211		)	—			(1,402		)	—			145
Asset (liability) balance, end of period	$	428		$	—		$	14,078		$	—		$	(356	)	$	—
At or For the Nine Months Ended September 30, 2018
Asset (liability) balance, beginning of period	$	6		$	3,356		$	21,386		$	223		$	(615	)	$	63
Total net gains (losses) included in:
Net income	—			254			1,913			393			(274		)	406
Other comprehensive income (loss)	—			—			1,015			—			—			—
Sales	—			(232,747		)	—			—			—			—
Originations	—			247,667			3,849			—			—			—
Principal paydowns / settlements	(2		)	(11		)	(10,451		)	—			231			—
Asset (liability) balance, end of period	$	4		$	18,519		$	17,712		$	616		$	(658	)	$	469

(1) Certain assets (liabilities) previously classified as Level 3 were transferred to Level 2 because current period prices are derived from Level 2 observable market data.

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Assets and Liabilities Recorded at Fair Value on a Non-recurring Basis

The following is a discussion of the valuation methodologies used to record assets and liabilities at fair value on a non-recurring basis.

Loans and Leases Held-for-sale: Auto loans held-for-sale, which were previously classified as held-for-investment were transferred to held-for-sale and recorded at the lower of the loan carrying amount or fair value. The fair value is determined based on internal estimates and/or assessments.

Loans and Leases: Loans and leases for which repayment is expected to be provided solely by the value of the underlying collateral, categorized as Level 3 and recorded at fair value on a non-recurring basis, are valued based on the fair value of that collateral less estimated selling costs. The fair value of the collateral is determined based on internal estimates and/or assessments provided by third-party appraisers and the valuation relies on discount rates ranging from 10.00% to 54.00%. Effective January 1, 2019, in conjunction with the adoption of ASU No. 2016-02, Leases (Topic 842) and the related ASUs, such loans and leases include nonaccrual impaired loans and leases as well as certain delinquent nonaccrual consumer loans. Previously, TCF did not include nonaccrual impaired leases. The fair value of the collateral is determined based on internal estimates and/or assessments provided by third-party appraisers.

Other Real Estate Owned: The fair value of other real estate owned, categorized as Level 3, is based on independent appraisals, real estate brokers' price opinions or automated valuation methods, less estimated selling costs. Certain properties require assumptions that are not observable in an active market in the determination of fair value and include a discount rate of 8.00%. Assets acquired through foreclosure are initially recorded at the lower of the loan or lease carrying amount or fair value less estimated selling costs at the time of transfer to other real estate owned.

Repossessed and Returned Assets: The fair value of repossessed and returned assets, categorized as Level 2 or Level 3 depending on the underlying asset type, is based on available pricing guides, auction results or price opinions, less estimated selling costs. Unobservable inputs used to value repossessed and returned assets categorized as Level 3 include discount rates ranging from 20.00% to 30.00%. Assets acquired through repossession or returned to TCF are initially recorded at the lower of the loan or lease carrying amount or fair value less estimated selling costs at the time of transfer to repossessed and returned assets.

The balances of assets measured at fair value on a non-recurring basis were as follows. There were no liabilities measured at fair value on a non-recurring basis at September 30, 2019 and December 31, 2018.

(In thousands)	Level 1		Level 2		Level 3		Total
At September 30, 2019
Loans held-for-sale	$	—	$	136	$	1,220,621	$	1,220,757
Loans and leases	—		—		130,991		130,991
Other real estate owned	—		—		17,924		17,924
Repossessed and returned assets	—		6,841		5,762		12,603
Total non-recurring fair value measurements	$	—	$	6,977	$	1,375,298	$	1,382,275
At December 31, 2018
Loans	$	—	$	—	$	57,663	$	57,663
Other real estate owned	—		—		9,397		9,397
Repossessed and returned assets	—		4,358		5,165		9,523
Total non-recurring fair value measurements	$	—	$	4,358	$	72,225	$	76,583

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Fair Value Option

TCF has elected the fair value option for residential loans held-for-sale. This election facilitates the offsetting of changes in fair value of the loans held-for-sale and the derivative financial instruments used to economically hedge them. The difference between the aggregate fair value and aggregate unpaid principal balance of these loans held-for-sale was as follows:

(In thousands)	September 30, 2019		December 31, 2018
Fair value carrying amount	$	114,831	$	18,070
Aggregate unpaid principal amount	111,540		17,517
Fair value carrying amount less aggregate unpaid principal	$	3,291	$	553

Differences between the fair value carrying amount and the aggregate unpaid principal balance include changes in fair value recorded at and subsequent to funding and gains and losses on the related loan commitment prior to funding. No loans recorded under the fair value option were delinquent or on nonaccrual status at September 30, 2019 and December 31, 2018. The net gain from initial measurement of the loans held-for-sale, any subsequent changes in fair value while the loans are outstanding and any actual adjustment to the gains realized upon sales of the loans totaled $12.4 million and $18.3 million for the three and nine months ended September 30, 2019, respectively, and $2.7 million and $6.9 million for the same periods in 2018, and are included in net (losses) gains on sales of loans and leases. These amounts exclude the impacts from the interest rate lock commitments and forward loan sales commitments which are also included in net (losses) gains on sales of loans and leases.

Disclosures about Fair Value of Financial Instruments

Management discloses the estimated fair value of financial instruments, including assets and liabilities on and off the Consolidated Statements of Financial Condition, for which it is practicable to estimate fair value. These fair value estimates were made at September 30, 2019 and December 31, 2018 based on relevant market information and information about the financial instruments. Fair value estimates are intended to represent the price at which an asset could be sold or a liability could be settled. However, given there is no active market or observable market transactions for many of TCF's financial instruments, the estimates of fair value are subjective in nature, involve uncertainties and include matters of significant judgment. Changes in assumptions could significantly affect the estimated values.

The carrying amounts and estimated fair values of TCF's financial instruments, excluding short-term financial assets and liabilities as their carrying amounts approximate fair value and excluding financial instruments recorded at fair value on a recurring basis, were as follows. This information represents only a portion of TCF's Consolidated Statements of Financial Condition not recorded in their entirety on a recurring basis and not the estimated value of TCF as a whole. Non-financial instruments such as the intangible value of TCF's branches and core deposits, leasing operations, goodwill, premises and equipment and the future revenues from TCF's customers are not reflected in this disclosure. Therefore, this information is of limited use in assessing the value of TCF.

	At September 30, 2019
	Carrying		Estimated Fair Value
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial instrument assets
FHLB and FRB stocks	$	290,238	$	—	$	290,238	$	—	$	290,238
Investment securities held-to-maturity	144,000		—		146,252		3,676		149,928
Loans and leases held-for-sale	100,216		—		84,959		18,331		103,290
Net loans(1)	30,916,379		—		—		30,897,046		30,897,046
Loan servicing rights	55,301		—		—		55,301		55,301
Securitization receivable(2)	19,624		—		—		19,355		19,355
Deferred fees on commitments to extend credit	18,485		—		18,485		—		18,485
Total financial instrument assets	$	31,544,243	$	—	$	539,934	$	30,993,709	$	31,533,643
Financial instrument liabilities
Certificates of deposits	$	8,385,972	$	—	$	8,385,496	$	—	$	8,385,496
Long-term borrowings	860,482		—		875,864		—		875,864
Deferred fees on standby letters of credit	38		—		38		—		38
Total financial instrument liabilities	$	9,246,492	$	—	$	9,261,398	$	—	$	9,261,398

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	At December 31, 2018
	Carrying		Estimated Fair Value
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial instrument assets
FHLB and FRB stocks	$	91,654	$	—	$	91,654	$	—	$	91,654
Investment securities held-to-maturity	148,852		—		146,467		2,800		149,267
Loans held-for-sale	72,594		—		—		74,078		74,078
Net loans(1)	16,384,702		—		—		16,399,551		16,399,551
Securitization receivable(2)	19,432		—		—		19,025		19,025
Deferred fees on commitments to extend credit	18,555		—		18,555		—		18,555
Total financial instrument assets	$	16,735,789	$	—	$	256,676	$	16,495,454	$	16,752,130
Financial instrument liabilities
Certificates of deposits	$	4,790,680	$	—	$	4,820,442	$	—	$	4,820,442
Long-term borrowings	1,449,472		—		1,451,550		—		1,451,550
Deferred fees on standby letters of credit	77		—		77		—		77
Total financial instrument liabilities	$	6,240,229	$	—	$	6,272,069	$	—	$	6,272,069

(1) Expected credit losses are included in the estimated fair values.

(2) Carrying amounts are included in other assets.

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Note 20. Revenue from Contracts with Customers

TCF earns a variety of revenue, including interest and fees, from customers, as well as revenues from noncustomers. The majority of TCF's sources of revenue are included in interest income and noninterest income and are outside of the scope of ASC Topic 606, Revenue from Contracts with Customers ("ASC 606"). Other sources of revenue fall within the scope of ASC 606 and are mostly included in noninterest income.

TCF recognizes revenue when the performance obligations related to the transfer of goods or services under the terms of a contract are satisfied. Some obligations are satisfied at a point in time, while others are satisfied over a period of time. Revenue is recognized as the amount of consideration expected to be received in exchange for transferring goods or services to a customer and is segregated based on the nature of product and services offered as part of contractual arrangements. Revenue streams within the scope of ASC 606 are discussed below.

• Fees and Service Charges on Deposit Accounts Fees and service charges on deposit accounts includes fees and other charges TCF receives to provide various services, including but not limited to, service charges on deposit accounts and other fees including account analysis fees, monthly service fees, overdraft services, transferring funds, and accepting and executing stop-payment orders. TCF's performance obligation for account analysis fees and monthly service fees are generally satisfied and, therefore, revenue is recognized over the period in which the service is provided. Deposit account related fees are largely transactional based, and therefore, the performance obligation is satisfied and the related revenue is recognized at the point in time when the transaction occurs.

• Wealth Management Revenue Wealth management revenue includes fee income generated from personal and institutional customers. TCF also provides investment management services. Revenue is recognized over the period of time the services are rendered. Wealth management revenue also includes commissions that are earned for placing a brokerage transaction for execution. Revenue is recognized once the transaction is completed and TCF is entitled to receive consideration.

• Card and ATM Revenue Card and ATM revenue includes ATM surcharges and debit card related revenue. ATM surcharges and certain debit card fees are transactional based and, therefore, the performance obligation is satisfied and the related revenue is recognized at the point in time when the transaction occurs. Other debit card fees satisfied over a period of time are recognized over the period in which the service is provided.

• Other Noninterest Income Other noninterest income includes wire transfer fees, safe deposit box income and check orders. The consideration includes both fixed (e.g., safe deposit box fees) and transaction (i.e., wire-transfer fee and check orders) fees. Fixed fees are recognized over the period of time the service is provided, while transaction fees are recognized when a specific service is rendered to the customer.

• Net Foreclosed Real Estate and Repossessed Assets Expense Net foreclosed real estate and repossessed assets expense includes net gain or loss on sales of other real estate owned and repossessed assets. Revenue is recognized at the time the sale is complete and TCF is entitled to receive consideration, including sales that are seller financed as receipt of all payment is expected.

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The following tables present total noninterest income segregated between contracts with customers within the scope of ASC 606 and those within the scope of other GAAP topics.

	Three Months Ended September 30, 2019
	Within the scope of ASC 606								Out of scope of ASC 606			Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	29,198		$	1,308		$	—	$	3,878		$	34,384
Wealth management revenue	1,047			—			—		3,194			$	4,241
Card and ATM revenue	21,476			23			—		1,816			$	23,315
Other noninterest income	137			(2,887		)	2,610		(12,169		)	$	(12,309	)
Total	$	51,858		$	(1,556	)	$	2,610	$	(3,281	)	$	49,631
Noninterest expense
Net foreclosed real estate and repossessed assets	$	(593	)	$	214		$	—	$	2,582		$	2,203

	Three Months Ended September 30, 2018
	Within the scope of ASC 606								Out of scope of ASC 606		Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	28,055		$	1,082		$	—	$	38	$	29,175
Wealth management revenue	—			—			—		—		$	—
Card and ATM revenue	19,999			14			—		61		$	20,074
Other noninterest income	(100		)	(2,649		)	4,686		4,306		$	6,243
Total	$	47,954		$	(1,553	)	$	4,686	$	4,405	$	55,492
Noninterest expense
Net foreclosed real estate and repossessed assets	$	215		$	(59	)	$	—	$	3,724	$	3,880

	Nine Months Ended September 30, 2019
	Within the scope of ASC 606								Out of scope of ASC 606			Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	81,098		$	3,504		$	—	$	3,902		$	88,504
Wealth management revenue	1,047			—			—		3,194			$	4,241
Card and ATM revenue	60,581			62			—		1,827			$	62,470
Other noninterest income	1,504			(5,271		)	9,986		(6,531		)	$	(312	)
Total	$	144,230		$	(1,705	)	$	9,986	$	2,392		$	154,903
Noninterest expense
Net foreclosed real estate and repossessed assets	$	(152	)	$	536		$	—	$	8,897		$	9,281

	Nine Months Ended September 30, 2018
	Within the scope of ASC 606							Out of scope of ASC 606			Total
(In thousands)	Consumer Banking		Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	80,468	$	3,137		$	—	$	98		$	83,703
Wealth management revenue	—		—			—		—			$	—
Card and ATM revenue	58,095		39			—		179			$	58,313
Other noninterest income	33,729		(6,771		)	15,112		(21,450		)	$	20,620
Total	$	172,292	$	(3,595	)	$	15,112	$	(21,173	)	$	162,636
Noninterest expense
Net foreclosed real estate and repossessed assets	$	719	$	(108	)	$	—	$	12,043		$	12,654

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Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity's obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. TCF's noninterest income streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is most often received immediately or shortly after TCF satisfies its performance obligation and revenue is recognized. TCF does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances.

Note 21.  Stock Based Compensation

Before the Merger, Chemical and Legacy TCF granted share-based awards under their respective share-based compensation plans, including the Chemical Stock Incentive Plan of 2019 (the "Stock Incentive Plan of 2019”") and the TCF Financial 2015 Omnibus Incentive Plan (the "Legacy TCF Omnibus Incentive Plan"). At September 30, 2019, there were 2,270,795 shares reserved for issuance under the Legacy TCF Omnibus Incentive Plan and there were 1,914,083 shares reserved for issuance under the Stock Incentive Plan of 2019.

In connection with the Merger, each equity award granted under Legacy TCF’s equity plans, including the Legacy Omnibus Incentive Plan, was legally assumed by the combined company and adjusted so that its holder is entitled to receive a number of shares of TCF Financial's common stock equal to the product of (a) the number of shares of Legacy TCF common stock subject to such award multiplied by (b) the Exchange Ratio and (c) rounded, as applicable, to the nearest whole share, and otherwise subject to the same terms and conditions (including, without limitation, with respect to vesting conditions (taking into account any vesting that occurred at the Merger Date) and cash dividend equivalent rights). For any Legacy TCF equity awards that were subject to performance-based vesting at multiple achievement levels, the number of shares of Legacy TCF common stock underlying such award was calculated and fixed as of the Merger Date assuming achievement of the applicable performance conditions at the greater of target level performance or the actual level of achievement of Legacy TCF’s performance results through the latest practicable date before the Merger Date, and such awards converted into service-based vesting awards with the applicable vesting date to be the last day of the original performance period. For purposes of Legacy TCF equity awards for which performance was achievable at a single level, the performance condition was deemed satisfied as of the Merger Date.

In connection with the Merger, all outstanding stock options, performance-based restricted stock units and time-vesting restricted stock units of Chemical, which we refer to as the Chemical equity awards, which were outstanding immediately before the Merger Date continue to be awards in respect of TCF Financial common stock following the Merger, subject to the same terms and conditions that were applicable to such awards before the Merger Date, except with respect to performance-based restricted stock units. Because the Merger constituted a change in control for purposes of the Chemical equity awards, the performance-based restricted stock units for which performance results had not been measured were measured as of the latest practicable date before the Merger Date and the number of performance-based restricted stock units was fixed at the greater of the target (100%) performance level or actual performance, which we refer to as the “Chemical Earned Awards,” and such Chemical Earned Awards will continue to vest based on the executive’s continued service through the end of the applicable performance period.

The fair value of share-based awards is recognized as compensation expense over the requisite service or performance period. Compensation expense for share-based awards was $4.8 million and $9.5 million for the three and nine months ended September 30, 2019, respectively, and $3.5 million and $13.1 million for the same periods in 2018. The excess tax benefit realized from share-based compensation transactions during the three and nine months ended September 30, 2019 was a benefit of $0.7 million and $2.0 million, respectively, and $0.3 million and $2.4 million for the same periods in 2018.

Restricted Stock Units

We can grant performance-based restricted stock units ("PRSUs") and time-based restricted stock units ("TRSUs") (collectively referred to as "RSUs") under the Stock Incentive Plan of 2019 and the Legacy TCF Omnibus Incentive Plan; provided, that, RSUs granted under the Legacy TCF Omnibus Incentive Plan may only be granted to former employees of Legacy TCF. At September 30, 2019, there were no PRSUs outstanding dependent on achieving certain performance target levels and the grantee completing the requisite service period. The TRSUs vest upon satisfaction of a service condition. Upon achievement of the performance target level and/or satisfaction of a service condition, as applicable, the RSUs are converted into shares of TCF Financial's common stock on a one-to-one basis.

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A summary of the activity for RSUs at and for the nine months ended September 30, 2019 is presented below:

	Number of Units		Weighted-average Grant Date Fair Value Per Unit
Outstanding at December 31, 2018	406,575		$	17.33
Outstanding at December 31, 2018 as adjusted for conversion	206,580		34.11
Granted	533,267		41.51
Converted in the Merger(1)	55,022		42.06
Acquired in the Merger	824,757		47.71
Forfeited/canceled	(20,648	)	41.64
Vested	(104,652	)	28.85
Outstanding at September 30, 2019	1,494,326		$	38.46

(1) In connection with the Merger, certain Legacy TCF PRSUs were converted at their maximum payout into 55,022 TRSUs.

Unrecognized compensation expense related to RSUs totaled $45.8 million and is expected to be recognized over the remaining weighted-average period of 2.4 years at September 30, 2019.

Restricted Stock Awards

TCF's restricted stock award transactions were as follows:

	Number of Awards		Weighted-Average Grant Date Fair Value Per Award
Outstanding at December 31, 2018	2,289,446		$	16.70
Outstanding at December 31, 2018 as adjusted for conversion	1,163,232		32.87
Granted	269,915		40.82
Forfeited/canceled	(135,760	)	34.15
Vested	(368,291	)	31.07
Outstanding at September 30, 2019	929,096		$	40.47

At September 30, 2019, there were no shares of performance-based restricted stock awards outstanding. Unrecognized stock compensation expense for restricted stock awards was $22.5 million with a weighted-average remaining amortization period of 2.5 years at September 30, 2019.

Stock Options

A summary of activity for TCF's stock options at and for the nine months ended September 30, 2019 is presented below:

	Non-Vested Stock Options Outstanding				Stock Options Outstanding
	Number of Options		Weighted-average Exercise Price		Number of Options		Weighted- average Exercise Price
Outstanding at December 31, 2018	—		$	—	—		$	—
Acquired(1)	127,906		39.38		520,379		29.48
Forfeited/canceled	(3,094	)	32.81		—		—
Expired	—		—		(756	)	32.81
Vested	(1,144	)	46.95		1,144		46.95
Outstanding at September 30, 2019	123,668		$	39.47	520,767		$	29.51
Exercisable/vested at September 30, 2019					520,767		$	29.51

(1) Options acquired in the Merger expire ten years from the date of grant and vest ratably over a five-year period.

The weighted-average remaining contractual term was 4.28 years for all outstanding stock options and 3.7 years for exercisable stock options at September 30, 2019. The intrinsic value of all outstanding in-the-money stock options and exercisable in-the-money stock options was $5.8 million and $5.3 million, respectively, at September 30, 2019. The aggregate intrinsic values of outstanding and exercisable options at September 30, 2019 were calculated based on the closing market price of TCF Financial's common stock on September 30, 2019 of $38.07 per share less the

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exercise price. Options with intrinsic values less than zero, or "out-of-the-money" options, are not included in the aggregate intrinsic value reported.

No cash was received from option exercises during the nine months ended September 30, 2019 and for the same period in 2018.

At September 30, 2019, unrecognized compensation expense related to stock options totaled $0.7 million and is expected to be recognized over a remaining weighted average period of 1.88 years.

Note 22.  Retirement Plans

TCF maintains four Legacy TCF employee benefit plans: (i) the TCF 401K Plan (the "TCF 401K"), (ii) the TCF 401k Supplemental Plan (the "Legacy TCF Supplemental Plan"), (iii) the TCF Cash Balance Pension Plan (the "Legacy TCF Pension Plan"), a defined benefit pension plan, and (iv) the TCF Postretirement Plan (the "Legacy TCF Postretirement Plan"), a postretirement benefit plan, each of which were discussed in Legacy TCF's Annual Report on Form 10-K for the year ended December 31, 2018.

TCF also maintains the Chemical employee benefit plans that existed before the Merger: (i) the Chemical Financial Corporation Nonqualified Postretirement Benefit Plan (the "Chemical Postretirement Benefit Plan"), a postretirement benefit plan, and (ii) the Chemical Financial Corporation 401k Savings Plan (the "Chemical 401k").

In addition, Chemical has a pension plan, the Chemical Pension Plan, which is a qualified defined-benefit, noncontributory pension plan. However, the termination of the Chemical Pension Plan was approved effective August 31, 2019. The discount rate was adjusted to 3.48% based on the remeasurement of the Chemical Pension Plan required due to the Merger and the termination. At the time of the Merger, as a result the pending termination, TCF recognized a prepaid asset representing the funded status of the Chemical Pension Plan, net of estimated settlement costs, and the balance previously in accumulated other comprehensive income was eliminated. The purchase accounting adjustment, as a result of the Merger, was reported in goodwill. The Chemical Pension Plan was fully funded as of September 30, 2019.

The Chemical Postretirement Benefit Plan provides medical and dental benefits, upon retirement, to a limited number of active and retired employees. The majority of the retirees are required to make contributions toward the cost of their benefits based on their years of credited service and age at retirement. Covered employees include those who were at least age 50 as of January 1, 2012, that retire at age 60 or older, have at least twenty-five years of service with Chemical and are participants in the active employee group health insurance plan. Eligible employees may also cover their spouse until age 65 as long as the spouse is not offered health insurance coverage through his or her employer. Employees and their spouses eligible to participate in the Chemical Postretirement Benefit Plan are required to make contributions toward the cost of their benefits upon retirement, with the contribution levels designed to cover the projected overall cost of these benefits over the long-term. Retiree contributions are generally adjusted annually. The accounting for these postretirement benefits anticipates changes in future cost-sharing features such as retiree contributions, deductibles, copayments and coinsurance. The benefits can be amended, modified or terminated by us at any time.

The Chemical 401k is available to all former Chemical employees that continue to be employed following the Merger Date, and provides tax deferred salary deductions and alternative investment options. We provide a safe harbor matching contribution of the participants elective deferrals up to a maximum of 6.0% of eligible compensation up to the maximum amount allowed under the Internal Revenue Code. The Chemical 401k provides the option to invest in TCF Financial common stock.

The Board of Directors approved the termination of the Legacy TCF Pension Plan effective November 1, 2019. The Legacy TCF Pension Plan was fully funded as of September 30, 2019. The weighted-average interest crediting rate was 2.24% as of September 30, 2019. TCF does not consolidate the assets and liabilities associated with the Legacy TCF Pension Plan.

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The net periodic benefit plan (income) cost for defined benefit pension plans and postretirement benefit plans were as follows:

	Defined Benefit Pension Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Interest cost	$	1,046		$	246		$	1,574		$	738
Service cost	—			—			—			—
Contractual termination cost	—			—			—			—
Return on plan assets	(949		)	(133		)	(1,223		)	(397		)
Amortization of prior service credit	—			—			—			—
Amortization of unrecognized net loss	—			—			—			—
Recognized actuarial (gain) loss	—			—			—			—
Net periodic benefit plan (income) cost	$	97		$	113		$	351		$	341

	Postretirement Benefit Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Interest cost	$	41		$	28		$	101		$	83
Service cost	—			—			—			—
Recognized actuarial (gain) loss	—			—			—			—
Amortization of prior service cost	(11		)	(12		)	(35		)	(35		)
Amortization of unrecognized net loss	—			—			—			—
Net periodic benefit plan (income) cost	$	30		$	16		$	66		$	48

TCF made no cash contributions to the defined benefit pension plans during the three and nine months ended September 30, 2019 and 2018. TCF contributed $0.1 million and $0.3 million to the Legacy TCF Postretirement Plan during the three and nine months ended September 30, 2019, and $0.1 million and $0.3 million during the same periods in 2018.

The TCF match under both the Legacy TCF 401k and the Chemical 401k was $4.3 million and $11.4 million for the three and nine months ended September 30, 2019, and $2.5 million and $9.7 million during the same periods in 2018.

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Note 23.  Earnings Per Common Share

The number of shares issued and outstanding, earnings per share, additional paid-in-capital and all references to share quantities of TCF have been retrospectively adjusted to reflect the equivalent number of shares issued in the Merger. The computations of basic and diluted earnings per common share and the anti-dilutive shares outstanding not included in the computation of diluted earnings per share were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollars in thousands, except per share data)	2019		2018		2019		2018
Basic earnings per common share
Net income attributable to TCF Financial Corporation	$	22,148	$	86,196	$	183,069	$	218,706
Preferred stock dividends	2,494		2,494		7,481		9,094
Impact of preferred stock redemption(1)	—		—		—		3,481
Net income available to common shareholders	19,654		83,702		175,588		206,131
Less: Earnings allocated to participating securities	—		13		19		30
Earnings allocated to common stock	$	19,654	$	83,689	$	175,569	$	206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation	128,575,171		83,762,625		97,876,262		84,522,519
Basic earnings per common share	$	0.15	$	1.00	$	1.79	$	2.44
Diluted earnings per common share
Earnings allocated to common stock	$	19,654	$	83,689	$	175,569	$	206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation	128,575,171		83,762,625		97,876,262		84,522,519
Net dilutive effect of:
Non-participating restricted stock	73,698		—		139,795		—
Stock options	105,719		—		39,222		1,670
Warrants	—		45,438		—		266,935
Weighted-average common shares outstanding used in diluted earnings per common share calculation	128,754,588		83,808,063		98,055,279		84,791,124
Diluted earnings per common share	$	0.15	$	1.00	$	1.79	$	2.43
Anti-dilutive shares outstanding not included in the computation of diluted earnings per common share
Non-participating restricted stock	1,369,025		1,058,202		1,369,025		1,058,202

(1) Represents the amount of deferred stock issuance costs originally recorded in preferred stock that were reclassified to retained earnings.

Note 24. Other Noninterest Expense

Other noninterest expense was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Outside processing	$	12,084	$	5,052	$	23,475	$	15,936
Loan and lease expense	9,323		3,313		15,986		10,430
Professional fees	7,113		5,949		18,026		16,035
Advertising and marketing	7,101		7,674		19,229		22,075
FDIC insurance	6,298		4,376		11,708		12,165
Card processing and issuance costs	5,746		4,090		14,437		12,759
Consumer Financial Protection Bureau and OCC settlement charge	—		—		—		32,000
Other	40,111		25,231		91,920		79,908
Total other noninterest expense	$	87,776	$	55,685	$	194,781	$	201,308

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Note 25. Reportable Segments

TCF's reportable segments are Consumer Banking, Commercial Banking and Enterprise Services. Consumer Banking is comprised of all of TCF's consumer-facing businesses and includes retail banking, consumer lending, wealth management and small business banking. Commercial Banking, previously named Wholesale Banking, is comprised of commercial and industrial and commercial real estate banking and lease financing. Enterprise Services is comprised of (i) corporate treasury, which includes TCF's investment and borrowing portfolios and management of capital, debt and market risks, (ii) corporate functions, such as information technology, risk and credit management, bank operations, finance, investor relations, corporate development, internal audit, legal and human capital management that provide services to the operating segments, (iii) the Holding Company and (iv) eliminations.

In connection with the Merger, effective August 1, 2019, TCF renamed its Wholesale Banking segment to Commercial Banking to align with the way TCF is now managed. In addition, activity that was related to small business banking and private banking were moved from the Wholesale Banking (now named Commercial Banking) segment to the Consumer Banking segment. The revised presentation of previously reported segment data has been applied retroactively to all periods presented in these financial statements.

TCF evaluates performance and allocates resources based on each reportable segment's net income or loss. The reportable segments follow GAAP as described in Note 1. Basis of Presentation, except for the accounting for intercompany interest income and interest expense, which are eliminated in consolidation and presenting net interest income on a fully tax-equivalent basis. TCF generally accounts for inter-segment sales and transfers at cost.

Certain information for each of TCF's reportable segments, including reconciliations of TCF's consolidated totals, was as follows:

(In thousands)	Consumer Banking			Commercial Banking		Enterprise Services			Consolidated
At or For the Three Months Ended September 30, 2019
Net interest income (expense)	$	191,940		$	157,437	$	22,416		$	371,793
Provision for credit losses	4,489			22,699		—			27,188
Net interest income (expense) after provision for credit losses	187,451			134,738		22,416			344,605
Noninterest income	57,102			47,929		(10,773		)	94,258
Noninterest expense	210,728			102,841		112,051			425,620
Income tax expense (benefit)	6,817			8,172		(26,724		)	(11,735		)
Income (loss) after income tax expense (benefit)	27,008			71,654		(73,684		)	24,978
Income attributable to non-controlling interest	—			2,830		—			2,830
Preferred stock dividends	—			—		2,494			2,494
Net income (loss) available to common shareholders	$	27,008		$	68,824	$	(76,178	)	$	19,654
Total assets(1)	$	14,906,457		$	22,076,203	$	8,709,851		$	45,692,511
At or For the Three Months Ended September 30, 2018
Net interest income (expense)	$	143,015		$	94,252	$	16,235		$	253,502
Provision (benefit) for credit losses	(953		)	3,223		—			2,270
Net interest income (expense) after provision for credit losses	143,968			91,029		16,235			251,232
Noninterest income	66,621			44,934		509			112,064
Noninterest expense	162,034			77,863		6,526			246,423
Income tax expense (benefit)	11,613			12,813		3,608			28,034
Income (loss) after income tax expense (benefit)	36,942			45,287		6,610			88,839
Income attributable to non-controlling interest	—			2,643		—			2,643
Preferred stock dividends	—			—		2,494			2,494
Net income (loss) available to common shareholders	$	36,942		$	42,644	$	4,116		$	83,702
Total assets	$	8,226,522		$	11,553,453	$	3,124,810		$	22,904,785

(1) As a result of the Merger, we recorded $1.1 billion of goodwill. Due to the timing of the Merger, we are in the process of completing our analysis of the allocation of goodwill across business segments, and, therefore, goodwill is presented as part of Enterprise Services at September 30, 2019.

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(In thousands)	Consumer Banking		Commercial Banking		Enterprise Services			Consolidated
At or For the Nine Months Ended September 30, 2019
Net interest income (expense)	$	470,738	$	350,848	$	58,693		$	880,279
Provision for credit losses	16,406		34,473		—			50,879
Net interest income (expense) after provision for credit losses	454,332		316,375		58,693			829,400
Noninterest income	183,767		132,883		(9,170		)	307,480
Noninterest expense	520,007		267,147		128,390			915,544
Income tax expense (benefit)	26,529		30,271		(27,934		)	28,866
Income (loss) after income tax expense (benefit)	91,563		151,840		(50,933		)	192,470
Income attributable to non-controlling interest	—		9,401		—			9,401
Preferred stock dividends	—		—		7,481			7,481
Net income (loss) available to common shareholders	$	91,563	$	142,439	$	(58,414	)	$	175,588
Total assets	$	14,906,457	$	22,076,203	$	8,709,851		$	45,692,511
At or For the Nine Months Ended September 30, 2018
Net interest income (expense)	$	429,132	$	289,315	$	36,895		$	755,342
Provision for credit losses	18,900		8,974		—			27,874
Net interest income (expense) after provision for credit losses	410,232		280,341		36,895			727,468
Total noninterest income	196,827		132,794		908			330,529
Total noninterest expense	511,915		229,094		23,433			764,442
Income tax expense (benefit)	23,037		40,505		2,541			66,083
Income (loss) after income tax expense (benefit)	72,107		143,536		11,829			227,472
Income attributable to non-controlling interest	—		8,766		—			8,766
Preferred stock dividends	—		—		9,094			9,094
Impact of preferred stock redemption	—		—		3,481			3,481
Net income (loss) available to common shareholders	$	72,107	$	134,770	$	(746	)	$	206,131
Total assets	$	8,226,522	$	11,553,453	$	3,124,810		$	22,904,785

Note 26. Commitments, Contingent Liabilities and Guarantees

Financial Instruments with Off-Balance Sheet Risk In the normal course of business, TCF enters into financial instruments with off-balance sheet risk, primarily to meet the financing needs of its customers. These financial instruments, which are issued or held for purposes other than trading, involve elements of credit and interest-rate risk in excess of the amounts recognized in the Consolidated Statements of Financial Condition.

TCF's exposure to credit loss, in the event of non-performance by the counterparty to the financial instrument is represented by the contractual amount of the commitments. TCF uses the same credit policies in making these commitments as it does for making direct loans. TCF evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained is based on a credit evaluation of the customer.

Financial instruments with off-balance sheet risk were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Commitments to extend credit:
Commercial	$	5,269,843	$	1,280,707
Consumer	2,266,913		1,627,960
Total commitments to extend credit	7,536,756		2,908,667
Standby letters of credit and guarantees on industrial revenue bonds	125,438		20,662
Total	$	7,662,194	$	2,929,329

Commitments to Extend Credit Commitments to extend credit are agreements to lend provided there is no violation of any condition in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a certain amount of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Collateral to secure any funding of these commitments predominantly consists of residential and commercial real estate mortgages.

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Standby Letters of Credit and Guarantees on Industrial Revenue Bonds Standby letters of credit and guarantees on industrial revenue bonds are conditional commitments issued by TCF guaranteeing the performance of a customer to a third party. These conditional commitments expire in various years through 2039. The majority of these standby letters of credit are collateralized. Collateral held consists primarily of commercial real estate mortgages. Since the conditions under which TCF is required to fund these commitments may not materialize, the cash requirements are expected to be less than the total outstanding commitments.

Contingencies and Guarantees TCF has originated and sold certain loans, and additionally acquired the potential liability for those historical originated and sold loans by merged or acquired entities, for which the buyer has limited recourse to us in the event the loans do not perform as specified in the agreements. The outstanding balance and the maximum potential amount of undiscounted future payments that TCF could be required to make in the event of nonperformance by the borrower totaled $0.7 million at September 30, 2019. In the event of nonperformance, TCF has rights to the underlying collateral securing the loans. At September 30, 2019, TCF had recorded a liability of $0.1 million, in connection with the recourse agreements, in other liabilities.

In addition, TCF acquired certain Small Business Administration ("SBA") guaranteed loans in which the guaranteed portion had been sold to a third party investor. In the event these loans default and the SBA guaranty is no longer intact (i.e. an issue found to have occurred during the origination or the liquidation of the loans) TCF would be liable to make the loan whole to the third party investor. The maximum potential amount of undiscounted future payments that TCF could be required to make in the event of default by the borrower was $17.6 million at September 30, 2019. In the event of default, TCF has rights to the underlying collateral securing the loans. At September 30, 2019, TCF had recorded a liability of $0.9 million, in other liabilities.

Representations, Warranties and Contractual Liabilities In connection with TCF's residential mortgage loan sales, and the historical sales of merged or acquired entities, TCF makes certain representations and warranties that the loans meet certain criteria, such as collateral type, underwriting standards and the manner in which the loans will be serviced. TCF may be required to repurchase individual loans and/or indemnify the purchaser against losses if the loan fails to meet established criteria. In addition, some agreements contain a requirement to repurchase loans as a result of early payoffs by the borrower, early payment default of the borrower or the failure to obtain valid title. At September 30, 2019 and December 31, 2018 the liability recorded in connection with these representations and warranties was $4.0 million and $1.3 million, respectively, included in other liabilities.

Litigation Contingencies From time to time, TCF is a party to legal proceedings arising out of its lending, leasing and deposit operations, including foreclosure proceedings and other collection actions as part of its lending and leasing collections activities. TCF may also be subject to regulatory examinations and enforcement actions brought by federal regulators, including the SEC, the Federal Reserve, the OCC and the Consumer Financial Protection Bureau which may impose sanctions on TCF for failures related to regulatory compliance. From time to time borrowers and other customers, and employees and former employees have also brought actions against TCF, in some cases claiming substantial damages. TCF and other financial services companies are subject to the risk of class action litigation. Litigation is often unpredictable and the actual results of litigation cannot be determined and therefore the ultimate resolution of a matter and the possible range of loss associated with certain potential outcomes cannot be established. Based on our current understanding of TCF's pending legal proceedings, management does not believe that judgments or settlements arising from pending or threatened legal matters, individually or in the aggregate, would have a material adverse effect on the consolidated financial position, operating results or cash flows of TCF.

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Note 27. Parent Company Financial Information

TCF Financial's condensed statements of financial condition, income and cash flows were as follows:

Condensed Statements of Financial Condition

(In thousands)	September 30, 2019		December 31, 2018
Assets
Cash and cash equivalents	$	165,457	$	91,132
Premises and equipment, net	3,883		78
Deferred tax asset	13,485		2,974
Investment in TCF Bank	5,483,484		2,426,329
Accounts receivable from TCF Bank	19,849		23,780
Other assets	25,823		1,201
Total assets	$	5,711,981	$	2,545,494
Liabilities and Equity
Long term borrowings	$	19,005	$	—
Other liabilities	22,872		7,693
Total liabilities	41,877		7,693
Equity	5,670,104		2,537,801
Total liabilities and equity	$	5,711,981	$	2,545,494

Condensed Statements of Income

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands)	2019			2018		2019			2018
Interest income	$	89		$	48	$	166		160
Interest expense	199			—		199			—
Net interest income	(110		)	48		(33		)	160
Noninterest income
Dividends from TCF Bank	—			32,001		150,001			331,000
Management fees	—			—		—			—
Other	1,979			5,383		8,742			14,352
Total noninterest income	1,979			37,384		158,743			345,352
Noninterest expense
Compensation and employee benefits	4,838			4,739		12,255			15,320
Occupancy and equipment	141			82		296			220
Other	1,675			1,420		3,689			4,186
Total noninterest expense	6,654			6,241		16,240			19,726
Income (loss) before income tax benefit and equity in undistributed earnings (loss) of TCF Bank	(58,744		)	31,191		77,970			325,786
Income tax benefit	11,409			116		14,572			1,633
Income before equity in undistributed earnings (loss) of TCF Bank	(47,335		)	31,307		92,542			327,419
Equity in undistributed earnings (loss) of TCF Bank	69,483			54,892		90,527			(108,713		)
Net income	22,148			86,199		183,069			218,706
Preferred stock dividends	2,494			2,493		7,482			12,574
Impact of preferred stock redemption	—			—		—			—
Net income available to common shareholders	$	19,654		$	83,706	$	175,587		$	206,132

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Condensed Statements of Cash Flows

	Nine Months Ended September 30,
(In thousands)	2019			2018
Cash flows from operating activities
Net income	$	183,069		$	218,706
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in undistributed (earnings) loss of TCF Bank	(90,527		)	108,713
Share-based compensation expense	17,762			14,041
Depreciation and amortization	99			26
Provision (benefit) for deferred income taxes	14			—
Net (losses) gains on sales of assets	(8		)	(387		)
Net change in other assets	(887		)	975
Net change in other liabilities	(13,104		)	(374		)
Other, net	(2,756		)	(100		)
Net cash provided by (used in) operating activities	93,662			341,600
Cash flows from investing activities
Purchases of premises and equipment and lease equipment	(51		)	(3		)
Proceeds from sales of premises and equipment	28			17
Net cash acquired in business combination	155,154			—
Other, net	—			665
Net cash provided by (used in) investing activities	155,131			679
Cash flows from financing activities
Redemption of Series B preferred stock	—			(100,000		)
Repurchases of common stock	(58,805		)	(149,912		)
Common shares sold to TCF employee benefit plans	—			715
Dividends paid on preferred stock	(7,482		)	(9,094		)
Dividends paid on common stock	(102,368		)	(74,916		)
Payments related to tax-withholding upon conversion of share-based awards	(5,813		)	(6,563		)
Exercise of stock options	—			(998		)
Net cash provided by (used in) financing activities	(174,468		)	(340,768		)
Net change in cash and cash equivalents	74,325			1,511
Cash and cash equivalents at beginning of period	91,132			80,471
Cash and cash equivalents at end of period	$	165,457		$	81,982

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Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.

Forward-looking Information

Any statements contained in this Quarterly Report on Form 10-Q regarding the outlook for our businesses and our respective markets, such as projections of future performance, targets, guidance, statements regarding our plans and objectives, forecasts of market trends and other matters are forward-looking statements based on our assumptions and beliefs. Such statements may be identified by such words or phrases as “will,” “believe,” “expect,” "will likely result," "are expected to," "will continue," "outlook," "will benefit," "is anticipated," "estimate," "project," "management believes" or similar expressions. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those discussed in such statements and no assurance can be given that the results in any forward-looking statement will be achieved. For these statements, TCF claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. Any forward-looking statement speaks only as of the date on which it is made and we disclaim any obligation to subsequently revise any forward-looking statement to reflect events or circumstances after such date or to reflect the occurrence of anticipated or unanticipated events, except as required by law.

Certain factors could cause our future results to differ materially from those expressed or implied in any forward-looking statements contained herein. These factors include the factors discussed in Item 1A. in each of TCF’s and Legacy TCF’s Annual Reports on Form 10-K for the year ended December 31, 2018, and in TCF’s other SEC filings, including the Joint Proxy Statement/Prospectus regarding the Merger that TCF filed with the SEC on May 3, 2019 pursuant to Rule 424(b)(3), the factors discussed below and any other cautionary statements, written or oral, which may be made or referred to in connection with any such forward-looking statements. Since it is not possible to foresee all such factors, these factors should not be considered as complete or exhaustive: deterioration in general economic, political and banking industry conditions; cyber-security breaches, hacking, denial of service, security breaches, loss or theft of information, or other cyber-attacks that disrupt our business operations or damage our reputation; fluctuation in interest rates that result in decreases in the value of assets or a mismatch between yields earned on our interest-earning assets and the rates paid on our deposits and borrowings; lack of access to liquidity; inability to pay and receive dividends; adverse effects related to competition from traditional competitors, non-bank providers of financial services and new technologies; soundness of other financial institutions and other counterparty risk, including the risk of default, operational disruptions, security breaches, or diminished availability of counterparties who satisfy our credit quality requirements; adverse developments affecting our branches, including supermarket branches; risks related to developing new products, markets or lines of business; the possible unavailability of LIBOR as a published benchmark rate and the potential uncertainties it could create for market participants, including TCF; changes in the allowance for loan and lease losses dictated by new market conditions, regulatory requirements or accounting standards, including CECL; new consumer protection and supervisory requirements or regulatory reform related to capital, leverage, liquidity or risk management; adverse changes in monetary, fiscal or tax policies; heightened regulatory practices or requirements related to enterprise risk management, the Bank Secrecy Act and anti-money laundering compliance activity; deficiencies in our compliance programs or risk mitigation frameworks; the effect of any negative publicity or reputational damage; technological or operational difficulties; failure to keep pace with technological change, including with respect to customer demands or system upgrades; risks related to our loan sales activity; dependence on accurate and complete information from customers and counterparties; the failure to attract and retain key employees; inability to successfully execute on our growth strategy through acquisitions or expanding existing business relationships; changes in accounting standards or interpretations of existing standards; adverse federal, state or foreign tax assessments; risks associated with actual or potential litigation or investigations by customers, regulatory agencies or others; ineffective internal controls; the effects of man-made and natural disasters, any of which may negatively affect our operations and/or our customers; the possibility that the anticipated benefits of the Merger, including anticipated cost savings and strategic gains, are not realized when expected or at all, including as a result of the impact of, or problems arising from, the integration of the two companies or as a result of the strength of the economy, competitive factors in the areas where TCF does business, or as a result of other unexpected factors or events; the impact of purchase accounting with respect to the Merger, or any change in the assumptions used regarding the assets purchased and liabilities assumed to determine their fair value; diversion of management's attention from ongoing business operations and opportunities as a result of the Merger; potential adverse reactions or changes to business or employee relationships, including those resulting from the completion of the Merger; the integration of the businesses and operations of Legacy TCF and Chemical may take longer than anticipated or be more costly than anticipated or have unanticipated adverse results relating to our businesses; business disruptions resulting from the Merger; and the potential impact of the Merger on relationships with third parties, including customers, vendors, employees and competitors.

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Overview

On August 1, 2019 (the "Merger Date"), TCF Financial Corporation, a Delaware corporation ("Legacy TCF"), merged with and into Chemical Financial Corporation, a Michigan corporation ("Chemical"), with Chemical continuing as the surviving corporation (the "Merger"). Immediately following the Merger, Chemical’s wholly owned bank subsidiary, Chemical Bank, a Michigan state-chartered bank, merged with and into Legacy TCF’s wholly owned bank subsidiary, TCF National Bank, a national banking association, with TCF National Bank surviving the merger (“TCF Bank”). Upon completion of the Merger, Chemical was renamed TCF Financial Corporation. TCF Financial Corporation (together with its direct and indirect subsidiaries, "we," "us," "our," "TCF" or the "Corporation"), is a financial holding company, headquartered in Detroit, Michigan. TCF Bank with its main office in Sioux Falls, South Dakota. References herein to "TCF Financial" or the "Holding Company" refer to TCF Financial Corporation on an unconsolidated basis.

The Merger was accounted for as a reverse merger using the acquisition method of accounting, which means that for accounting and financial reporting purposes, Legacy TCF was deemed to have acquired Chemical in the Merger, even though Chemical was the legal acquirer. Accordingly, Legacy TCF's historical financial statements are the historical financial statements of the combined company for all periods before the Merger Date. Our results of operations for the third quarter of 2019 and the first nine months of 2019 include the results of operations of Chemical on and after August 1, 2019. Results for periods before August 1, 2019 reflect only those of Legacy TCF and do not include the results of operations of Chemical. Accordingly, comparisons of our results for the third quarter of 2019 and the first nine months of 2019 with those of prior periods may not be meaningful. The number of shares issued and outstanding, earnings per share, additional paid-in-capital and all references to share quantities of TCF have been retrospectively adjusted to reflect the equivalent number of shares issued in the Merger. See Note 2. Merger of the Notes to Consolidated Financial Statements for further information. In addition, the assets, including the intangible assets identified, and liabilities of Chemical as of the Merger Date have been recorded at their estimated fair value and added to those of Legacy TCF.

As of September 30, 2019, TCF had more than 500 branches primarily located in Michigan, Illinois and Minnesota with additional locations in Arizona, Colorado, Indiana, Ohio, South Dakota and Wisconsin. TCF also conducts business across all 50 states and Canada through its specialty lending and leasing businesses. Through its direct subsidiaries, TCF provides consumer and commercial banking, trust and wealth management, and specialty leasing and lending products and services to consumers, small businesses and commercial customers.

Net interest income, the difference between interest income earned on loans and leases, investments securities and other earning assets (interest income) and interest paid on deposits and borrowings (interest expense), represented 79.8% and 74.1% of our total revenue for the three and nine months ended September 30, 2019, respectively, compared with 69.3% and 69.6% for the same periods in 2018. Net interest income can change significantly from period to period based on interest rates, customer prepayment patterns and the volume and mix of interest earning assets, noninterest-bearing deposits and interest-bearing liabilities. We manage the risk of changes in interest rates on our net interest income through TCF's Asset & Liability Committee ("ALCO") and through related interest rate risk monitoring and management policies. See "Part I, Item 3. Quantitative and Qualitative Disclosures about Market Risk" for further discussion.

Noninterest income is a significant source of our revenue and an important component of our results of operations. The significant components of noninterest income are from leasing revenue, fees and service charges on deposit accounts and card and ATM revenue. Leasing revenue generates noninterest income primarily from operating and sales-type leases. Providing a wide range of consumer banking services is an integral component of our business philosophy. Primary drivers of fees and service charges include the number of customers we attract, the customers' level of engagement and the frequency with which the customer uses our solutions.

The following portions of this Management's Discussion and Analysis of Financial Condition and Results of Operations ("Management's Discussion and Analysis") focus in more detail on the results of operations for the three and nine months ended September 30, 2019 and 2018 and on information about TCF's financial condition, loan and lease portfolio, liquidity management, capital and other matters. This discussion should be read in conjunction with the Consolidated Financial Statements and accompanying notes appearing in this report and in conjunction with the Consolidated Financial Statements and related notes and disclosures in the Legacy TCF 2018 Annual Report on Form 10-K filed as Exhibit 99.1 to TCF’s Current Report on Form 8-K filed with the SEC on August 1, 2019.

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LIBOR Transition

In 2017, the U.K. Financial Conduct Authority (the “FCA”) noted that market conditions raised serious questions about the future sustainability of LIBOR benchmarks. Many financial products, including mortgages and other consumer loans, commercial loans, corporate loans, various types of debt, derivatives and other securities, reference LIBOR to determine their applicable interest rate. The expected cessation of publication of LIBOR will impact the mechanics of floating rate financial instruments and contracts that reference LIBOR and mature after 2021. Certain of these financial products do not provide for alternative reference rates, and those that do may differ from the prior benchmark rates. The FCA subsequently announced that it had secured voluntary panel bank support of LIBOR through only 2021. As a result, central banks and regulators have convened working groups to find a suitable replacement index for LIBOR, and TCF is working to identify, assess and monitor risks associated with the expected discontinuation or unavailability of LIBOR, achieve operational readiness and engage impacted customers in connection with the transition.

Critical Accounting Estimates

TCF's Consolidated Financial Statements are prepared in accordance with United States generally accepted accounting principles ("GAAP"), Securities and Exchange Commission ("SEC") rules and interpretive releases and general practices within the industry in which we operate. Application of these principles requires management to make estimates, assumptions and complex judgments that affect the amounts reported in our Consolidated Financial Statements and accompanying notes. These estimates, assumptions and judgments are based on information available as of the date of the financial statements; accordingly, as this information changes, our Consolidated Financial Statements could reflect different estimates, assumptions and judgments. Actual results could differ significantly from those estimates. Certain policies inherently have a greater reliance on the use of estimates, assumptions and judgments and, as such, have a greater possibility of producing results that could be materially different than originally reported. We use third-party sources to assist us with developing certain estimates, assumptions and judgments regarding certain amounts reported in our Consolidated Financial Statements and accompanying notes. When using third-party sources, management remains responsible for complying with GAAP. To execute management's responsibilities, we have processes in place to develop an understanding of the third-party methodologies and to design and implement specific internal controls over valuation.

As a result of the Merger, we have updated our critical accounting estimates. We have identified the determination of the allowance for loan and lease losses, accounting for business combinations (including fair value of purchased loans), and the evaluation of goodwill impairment to be the accounting areas that require the most subjective or complex judgments and, as such, could be most subject to revision as new or additional information becomes available or circumstances change, including overall changes in the economic climate and/or market interest rates. Therefore, we consider them to be critical accounting estimates and discuss them directly with the Audit Committee of our board of directors.

Our significant accounting estimates related to the allowance for loan and lease losses is more fully described in Note 2 to the Legacy TCF audited Consolidated Financial Statements and notes thereto at and for the year ended December 31, 2018, filed as Exhibit 99.1 to TCF's Current Report on Form 8-K filed with the SEC on August 1, 2019.

Updates to Critical Accounting Estimates

Accounting for Business Combinations

Pursuant to the guidance of Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 805, Business Combinations ("ASC 805"), we recognize assets acquired, including identified intangible assets, and the liabilities assumed in acquisitions at their fair values as of the acquisition date, with the merger-related transaction costs expensed in the period incurred. Determining the fair value of assets acquired, including identified intangible assets, and liabilities assumed often involves estimates based on third-party valuations, such as appraisals, or internal valuations based on discounted cash flow analysis or other valuation techniques that may include estimates of attrition, inflation, asset growth rates, discount rates, multiples of earnings or other relevant factors. In addition, the determination of the useful lives over which an intangible asset will be amortized is subjective.

Accounting for Loans Acquired in a Business Combination

We record loans and leases acquired in a business combination at fair value at the acquisition date and the fair value discount or premium is recognized as an adjustment to yield over the remaining life of each loan or lease. Credit

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discounts are included in the determination of fair value; therefore, an allowance for loan and lease losses is not recorded at the acquisition date. Purchased loans are evaluated at the acquisition date and classified as either (i) loans purchased without evidence of deteriorated credit quality since origination, referred to as purchased loans, or (ii) loans purchased with evidence of deteriorated credit quality since origination for which it is probable that all contractually required payments will not be collected, referred to as purchased credit impaired (“PCI”) loans.

PCI loans are considered to be impaired and are accounted for under ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality ("ASC 310-30"). In determining whether a purchased loan should be classified as a PCI loan, we must make numerous assumptions, interpretations and judgments using internal and third-party credit quality information to determine whether or not it is probable that we will be able to collect all contractually required payments. This is a point in time assessment and is inherently subjective due to the nature of the available information and judgment involved. Evidence of credit quality deterioration as of the acquisition date may include statistics such as past due and nonaccrual status, recent borrower credit scores and loan-to-value percentages. The excess of cash flows expected to be collected over the estimated fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated remaining life of the loan using the effective yield method. We estimate the expected cash flows based on the expected remaining life of the loans, which includes the effects of estimated prepayments and estimates of future credit losses. Cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change. The difference between the contractually required payments and the cash flows expected to be collected at acquisition, is referred to as the nonaccretable difference.

We do not classify PCI loans as nonperforming loans subsequent to acquisition because the loans are recorded at net realizable value based on the principal and interest expected to be collected on the loan. Judgment is required to estimate the timing and amount of cash flows expected to be collected when the loans are not performing in accordance with the original contractual terms.

Purchased loans outside the scope of ASC 310-30 are accounted for under ASC 310-20, Receivables - Nonrefundable Fees and Other Costs. For purchased loans, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value and the discount is accreted to interest income over the life of the loan. Subsequent to the purchase date, the method used to evaluate the sufficiency of the credit discount is similar to originated loans, and if necessary, additional reserves are recognized in the allowance for loan and lease losses.

Goodwill

Goodwill represents the excess of the purchase price of our business acquisition and other purchases of bank branches and other businesses over the fair value of the net assets acquired. Goodwill totaled $1.3 billion at September 30, 2019, compared with $154.8 million at December 31, 2018. The increase in goodwill during the nine months ended September 30, 2019 was due to the Merger. Goodwill is not amortized, but rather is tested by management annually for impairment, or more frequently if triggering events occur and indicate potential impairment, in accordance with ASC Topic 350-20, Goodwill (ASC 350-20). ASC 350-20 allows an entity to assess qualitative factors to determine whether it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount. ASC 350-20 also allows an entity to bypass the qualitative assessment approach and determine if goodwill is impaired utilizing a quantitative assessment approach.

In evaluating whether it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount, we assess relevant events and circumstances, including macroeconomic conditions, industry and market considerations, overall financial performance, changes in the composition or carrying amount of assets and liabilities, the market price of our common stock, and other relevant factors. TCF has historically performed its annual assessment as of December 31^st. As a result of its Merger, TCF has elected to perform its annual test in the fourth quarter utilizing September 30^th financial data. The change in assessment date is not material to the financial statements and allows management more time to perform the analysis of the significant goodwill generated as a result of the merger. We do not believe that any events or circumstances changed as of September 30, 2019 that would indicate that is it more likely than not that the fair value of a reporting unit is less than its carrying amount. However, we could incur impairment charges related to goodwill in the future due to changes in financial results or other matters that could affect the fair value of our reporting units.

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Selected Financial Data

The following table provides our selected financial information for the periods and at the dates indicated. This information should be read together with our Consolidated Financial Statements and the related notes thereto, which are included elsewhere in this report. Our financial results were significantly impacted by the Merger, and periods before the Merger reflect financial data of Legacy TCF, while periods after the Merger reflect financial data for the combined company. Earnings per share and share quantities of TCF have been retrospectively adjusted to reflect the equivalent number of shares issued in the Merger. As noted in the following table, we have included certain non-GAAP financial measures, which should be read in conjunction with the section entitled "Non-GAAP Financial Measures" and the accompanying table entitled "Reconciliation of Non-GAAP Operating Results," for reconciliation of non-GAAP measures to the most directly comparable GAAP financial measure. Historical data is not necessarily indicative of TCF's future results of operations or financial condition.

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(Dollars in thousands, except per share data)	2019			2018			2019			2018
Consolidated Income:
Interest income	$	459,808		$	291,707		$	1,077,483		$	861,420
Interest expense	88,015			38,205			197,204			106,078
Net interest income	371,793			253,502			880,279			755,342
Noninterest income	94,258			112,064			307,480			330,529
Total revenue	466,051			365,566			1,187,759			1,085,871
Provision for credit losses	27,188			2,270			50,879			27,874
Noninterest expense	425,620			246,423			915,544			764,442
Income before income tax expense	13,243			116,873			221,336			293,555
Income tax (benefit) expense	(11,735		)	28,034			28,866			66,083
Income attributable to non-controlling interest	2,830			2,643			9,401			8,766
Net income attributable to TCF	22,148			86,196			183,069			218,706
Preferred stock dividends	2,494			2,494			7,481			9,094
Impact of preferred stock redemption	—			—			—			3,481
Net income available to common shareholders	$	19,654		$	83,702		$	175,588		$	206,131
Earnings per common share:
Basic	$	0.15		$	1.00		$	1.79		$	2.44
Diluted	0.15			1.00			1.79			2.43
Financial Ratios:
Return on average assets ("ROAA")(1)	0.26		%	1.55		%	0.88		%	1.32		%
Return on average common equity ("ROACE")(1)	1.75			14.44			7.50			11.80
Return on average tangible common equity ("ROATCE")(1)(2)	2.68			15.76			9.05			12.89
Net interest margin (FTE)(1)(3)(4)	4.14			4.73			4.36			4.70
Dividend payout ratio	233.33			29.41			52.54			36.59
Efficiency ratio	91.32			67.41			77.08			70.40
Credit Quality Ratios:
Net charge-offs as a percentage of average loans and leases(1)	0.39			0.15			0.36			0.24
Adjusted Financial Results (non-GAAP):
Adjusted net income attributable to TCF(2)	$	128,301		$	86,196		$	299,638		$	244,215
Adjusted diluted earnings per common share(2)	$	0.98		$	1.00		$	2.98		$	2.73
Adjusted ROAA(1)(2)	1.34		%	1.55		%	1.41		%	1.46		%
Adjusted ROACE(1)(2)	11.21			14.44			12.48			13.26
Adjusted ROATCE(1)(2)	14.96			15.76			14.90			14.47
Adjusted efficiency ratio (non-GAAP)(2)	58.74			64.91			61.57			65.08

(1) Annualized.

(2) See section entitled "Non-GAAP Financial Measures" for further information.

(3) Net interest income on a fully tax-equivalent ("FTE") basis divided by average interest-earning assets.

(4) Presented on a tax-equivalent basis using a 21% tax rate for each period presented.

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(Dollars in thousands)	At September 30, 2019			At December 31, 2018
Consolidated Financial Condition:
Loans and leases	$	33,510,752		$	19,073,020
Total assets	45,692,511			23,699,612
Deposits	35,286,074			18,903,686
Borrowings	3,467,782			1,449,472
Total equity	5,693,417			2,556,260
Financial Ratios:
Common equity to assets	12.04		%	9.99		%
Tangible common equity as a percent of tangible assets (non-GAAP)(1)	9.09		%	9.32		%
Total risk-based capital ratio	12.63		%	13.38		%
Book value per common share	$	35.82		$	26.85
Tangible book value per common share (non-GAAP)(1)	26.18			24.87
Credit Quality Ratios:
Nonaccrual loans and leases as a percentage of total loans and leases	0.54		%	0.56		%
Nonperforming assets as a percentage of total loans and leases and other real estate owned	0.62		%	0.65		%
Allowance for loan and lease losses as a percentage of total nonaccrual loans and leases	66.67		%	148.65		%

(1) See section entitled "Non-GAAP Financial Measures" for further information.

Results of Operations

Performance Summary TCF reported net income of $22.1 million and $183.1 million for the three and nine months ended September 30, 2019, respectively, compared with $86.2 million and $218.7 million for the same periods in 2018. For the three and nine months ended September 30, 2019, net income included merger-related expenses of $111.3 million in addition to non-core items of $41.1 million. Non-core items, for both the three and nine months ended September 30, 2019, included the loss on transfer of legacy TCF auto finance portfolio to held-for-sale ($19.3 million), the termination of interest rate swaps ($17.3 million), the write-down of company-owned vacant land parcels due to an intent to sell ($5.9 million), and loan servicing rights impairment ($4.5 million), partially offset by the gain on sale of certain investment securities ($5.9 million). Net income included non-core items for the nine months ended September 30, 2018 a $32.0 million charge related to the settlement with the Consumer Financial Protection Bureau (the "CFPB") and Office of the Comptroller of the Currency (the "OCC"). Adjusted net income, excluding merger-related expenses and the identified non-core items, net of tax, a non-GAAP financial measure, was $128.3 million and $299.6 million for the three and nine months ended September 30, 2019, respectively, compared to $86.2 million and $244.2 million for the same periods in 2018. See "Non-GAAP Financial Measures" in this Management's Discussion and Analysis for further information.

TCF reported diluted earnings per common share of $0.15 and $1.79 for the three and nine months ended September 30, 2019, respectively, compared with $1.00 and $2.43 for the same periods in 2018. Adjusted diluted earnings per common share, a non-GAAP financial measure, for the three and nine months ended September 30, 2019 was $0.98 and $2.98, respectively, excluding merger-related expenses and non-core items. Adjusted diluted earnings per common share, a non-GAAP financial measure, for the three and nine months ended September 30, 2018 was $1.00 and $2.73, respectively. See "Non-GAAP Financial Measures" in this Management's Discussion and Analysis for further information.

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The following table provides TCF's financial ratios and the adjusted ratios, a non-GAAP financial measure which excludes merger expenses and non-core items.

Summary of Financial Ratios
	Three Months Ended September 30,				Nine Months Ended September 30,				Change From
	2019		2018		2019		2018		Three Months Ended September 30,			Nine Months Ended September 30,
(Dollars in thousands, except per share data)									2018			2018
Return on average assets ("ROAA")(1)	0.26	%	1.55	%	0.88	%	1.32	%	(129	)	bps	(44	)	bps
ROACE(1)	1.75		14.44		7.50		11.80		(1,269	)		(430	)
ROATCE (non-GAAP)(1)(2)	2.68		15.76		9.05		12.89		(1,308	)		(384	)
Adjusted Financial Results (non-GAAP)
Adjusted ROAA(1)(2)	1.34	%	1.55	%	1.41	%	1.46	%	(21	)	bps	(5	)	bps
Adjusted ROACE(1)(2)	11.21		14.44		12.48		13.26		(323	)		(78	)
Adjusted ROATCE(1)(2)	14.96		15.76		14.90		14.47		(80	)		43

(1) Annualized.

(2) See section entitled "Non-GAAP Financial Measures" in this Management's Discussion and Analysis for further information.

Consolidated Income Statement Analysis

Net Interest Income Net interest income was $371.8 million and $880.3 million for the three and nine months ended September 30, 2019, respectively, compared with $253.5 million and $755.3 million for the same periods in 2018. Net interest income, our largest source of net revenue (net interest income plus noninterest income), represented 79.78% and 74.11% of our total revenue for the three and nine months ended September 30, 2019, respectively, compared with 69.35% and 69.56% for the same periods in 2018. The increases in net interest income for the three and nine months ended September 30, 2019, compared to the same periods in 2018, were primarily attributable to the increase in interest-earning assets acquired in the Merger, partially offset by the increase in interest-bearing liabilities acquired in the Merger.

Net interest income, on a fully tax-equivalent ("FTE") basis, is the difference between interest income and interest expense adjusted for the tax benefit received on tax-exempt loans, leases and investment securities. Net interest margin (FTE) is calculated by dividing net interest income (FTE) by average interest-earning assets, expressed as a percentage, annualized as applicable. Net interest income and net interest margin are affected by (i) changes in prevailing short- and long-term interest rates, (ii) loan, lease and deposit pricing strategies and competitive conditions, (iii) the volume and mix of interest-earning assets, noninterest-bearing deposits and interest-bearing liabilities, (iv) the level of nonaccrual loans and leases and other real estate owned and (v) the impact of modified loans and leases. Net interest margin (FTE) was 4.14% and 4.36% for the three and nine months ended September 30, 2019, respectively, compared with 4.73% and 4.70% for the same periods in 2018. The decrease in net interest margin (FTE) for the three and nine months ended September 30, 2019, compared to the same periods in 2018, was primarily due to a decrease in the yield earned on loans and leases added as a result of the lower average yields added to the portfolio through the Merger.

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The following tables present the average balances of our major categories of assets and liabilities, interest income and expense on a FTE basis, average interest rates earned and paid on the assets and liabilities, net interest income (FTE), net interest spread and net interest margin for the three months ended September 30, 2019 and September 30, 2018 and for the nine months ended September 30, 2019 and September 30, 2018. The presentation of net interest income on a FTE basis is not in accordance with GAAP but is customary in the banking industry. This non-GAAP measure ensures comparability of net interest income arising from both taxable and tax-exempt loans and investment securities.

	Three Months Ended September 30,
	2019							2018
(Dollars in thousands)	Average Balance		Interest(1)			Yields and Rates(1)(2)		Average Balance		Interest(1)			Yields and Rates(1)(2)
Assets:
Federal Home Loan Bank and Federal Reserve Bank stocks	$	230,767	$	806		1.39	%	$	87,485	$	1,057		4.81	%
Investment securities held-to-maturity	143,078		602			1.68		153,652		988			2.57
Investment securities available-for-sale:
Taxable	4,232,878		30,436			2.88		1,525,665		10,511			2.76
Tax-exempt(3)	643,576		4,283			2.66		823,854		5,478			2.66
Loans and leases held-for-sale	118,482		1,408			4.74		216,669		3,625			6.64
Loans and leases(1)(3)(4)	29,503,475		418,960			5.62		18,416,310		270,129			5.82
Interest-bearing deposits with banks and other	933,014		5,800			2.44		218,771		2,031			3.69
Total interest-earning assets	35,805,270		462,295			5.11		21,442,406		293,819			5.44
Other assets	3,289,096							1,461,998
Total assets	$	39,094,366						$	22,904,404
Liabilities and Equity:
Noninterest-bearing deposits	$	6,564,195						$	3,874,421
Interest-bearing deposits:
Checking	4,805,843		5,520			0.46		2,427,288		234			0.04
Savings	7,676,165		14,110			0.73		5,620,161		4,994			0.35
Money market	3,490,922		13,037			1.48		1,496,223		2,941			0.78
Certificates of deposit	7,320,720		38,233			2.07		4,868,286		19,310			1.57
Total interest-bearing deposits	23,293,650		70,900			1.21		14,411,958		27,479			0.76
Total deposits	29,857,845		70,900			0.94		18,286,379		27,479			0.60
Borrowings:
Short-term borrowings	1,884,228		5,345			1.11		3,357		21			2.44
Long-term borrowings	1,472,150		11,769			3.17		1,351,585		10,705			3.13
Total borrowings	3,356,378		17,114			2.01		1,354,942		10,726			3.13
Total interest-bearing liabilities	26,650,028		88,014			1.31		15,766,900		38,205			0.96
Total deposits and borrowings	33,214,223		88,014			1.05		19,641,321		38,205			0.77
Accrued expenses and other liabilities	1,197,014							751,100
Total liabilities	34,411,237							20,392,421
Total TCF Financial Corporation shareholders' equity	4,657,613							2,488,435
Non-controlling interest in subsidiaries	25,516							23,548
Total equity	4,683,129							2,511,983
Total liabilities and equity	$	39,094,366						$	22,904,404
Net interest spread (FTE)						4.06							4.67
Net interest income (FTE) and net interest margin (FTE)			$	374,281		4.14				$	255,614		4.73
Reconciliation to Reported Net Interest Income
Net interest income (FTE)			$	374,281						$	255,614
Adjustments for taxable equivalent interest(1)(3)
Loans and leases			$	(1,590	)					$	(962	)
Tax-exempt investment securities			(898		)					(1,150		)
Total FTE adjustments			(2,488		)					(2,112		)
Net interest income (GAAP)			$	371,793						$	253,502
Net interest margin (GAAP)			4.12		%					4.69		%

(1) Interest and yields are presented on a FTE basis.

(2) Annualized.

(3) The yield on tax-exempt loans, leases and investment securities available-for-sale is computed on a FTE basis using a statutory federal income tax rate of 21%.

(4) Average balances of loans and leases include nonaccrual loans and leases and are presented net of unearned income.

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	Nine Months Ended September 30,
	2019							2018
(Dollars in thousands)	Average Balance		Interest(1)			Yields and Rates(1)(2)		Average Balance		Interest(1)			Yields and Rates(1)(2)
Assets:
Federal Home Loan Bank and Federal Reserve Bank stocks	$	149,801	$	2,860		2.55	%	$	90,600	$	2,698		3.98	%
Investment securities held-to-maturity	145,627		2,061			1.89		156,170		3,005			2.57
Investment securities available-for-sale:
Taxable	3,029,754		67,684			2.98		1,258,708		24,487			2.59
Tax-exempt(3)	461,499		9,210			2.66		824,551		16,444			2.66
Loans and leases held-for-sale	71,739		2,832			5.27		108,992		5,281			6.48
Loans and leases(1)(3)(4)	22,681,170		987,504			5.80		18,918,591		809,751			5.71
Interest-bearing deposits with banks and other	494,007		10,878			2.92		225,203		6,023			3.58
Total interest-earning assets	27,033,597		1,083,029			5.33		21,582,815		867,689			5.36
Other assets	2,249,678							1,448,293
Total assets	$	29,283,275						$	23,031,108
Liabilities and Equity:
Noninterest-bearing deposits	$	4,831,271						$	3,833,543
Interest-bearing deposits:
Checking	3,256,409		6,347			0.26		2,449,723		466			0.03
Savings	6,799,432		37,094			0.73		5,520,287		11,895			0.29
Money market	2,144,697		22,078			1.38		1,588,210		7,970			0.67
Certificates of deposit	5,500,105		83,635			2.03		4,924,804		53,897			1.46
Total interest-bearing deposits	17,700,643		149,154			1.13		14,483,024		74,228			0.69
Total deposits	22,531,914		149,154			0.88		18,316,567		74,228			0.54
Borrowings:
Short-term borrowings	838,750		9,433			1.48		3,473		58			2.23
Long-term borrowings	1,543,398		38,616			3.32		1,435,088		31,792			2.94
Total borrowings	2,382,148		48,049			2.67		1,438,561		31,850			2.93
Total interest-bearing liabilities	20,082,791		197,203			1.31		15,921,585		106,078			0.89
Total deposits and borrowings	24,914,062		197,203			1.06		19,755,128		106,078			0.72
Accrued expenses and other liabilities	1,052,709							741,222
Total liabilities	25,966,771							20,496,350
Total TCF Financial Corp. shareholders' equity	3,289,946							2,509,625
Non-controlling interest in subsidiaries	26,558							25,133
Total equity	3,316,504							2,534,758
Total liabilities and equity	$	29,283,275						$	23,031,108
Net interest spread (FTE)						4.27							4.64
Net interest income (FTE) and net interest margin (FTE)			$	885,826		4.36				$	761,611		4.70
Reconciliation to Reported Net Interest Income
Net interest income (FTE)			$	885,826						$	761,611
Adjustments for taxable equivalent interest(1)(3)
Loans			(3,614		)					(2,816		)
Tax-exempt investment securities			(1,933		)					(3,453		)
Total FTE adjustments			(5,547		)					(6,269		)
Net interest income (GAAP)			$	880,279						$	755,342
Net interest margin (GAAP)			4.35		%					4.68		%

(1) Interest and yields are presented on a FTE basis.

(2) Annualized.

(3) The yield on tax-exempt loans, leases and investment securities available-for-sale is computed on a FTE basis using a statutory federal income tax rate of 21%.

(4) Average balances of loans and leases include nonaccrual loans and leases and are presented net of unearned income.

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Volume and Rate Variance Analysis

	Three Months Ended September 30, 2019 vs. 2018									Nine Months Ended September 30, 2019 vs. 2018
	Increase (Decrease) Due to Changes in									Increase (Decrease) Due to Changes in
(Dollars in thousands)	Average Volume(1)			Average Yield/Rate(1)			Total Change			Average Volume(1)			Average Yield/Rate(1)			Total Change
Changes in Interest Income on Interest-Earning Assets:
Federal Home Loan Bank and Federal Reserve Bank stocks	$	873		$	(1,124	)	$	(251	)	$	1,355		$	(1,193	)	$	162
Investment securities held to maturity	(64		)	(322		)	(386		)	(192		)	(752		)	(944		)
Investment securities available for sale:
Taxable	19,446			479			19,925			39,077			4,120			43,197
Tax-exempt	(1,200		)	5			(1,195		)	(7,246		)	12			(7,234		)
Loans and leases held for sale	(1,358		)	(859		)	(2,217		)	(1,586		)	(863		)	(2,449		)
Loans and leases	158,371			(9,540		)	148,831			164,581			13,172			177,753
Interest-bearing deposits with banks and other	4,670			(901		)	3,769			6,149			(1,294		)	4,855
Total interest-earning assets	$	180,738		$	(12,262	)	$	168,476		$	202,138		$	13,202		$	215,340
Changes in Interest Expense on Interest-Bearing Liabilities:
Interest-bearing deposits:
Checking	$	435		$	4,851		$	5,286		$	202		$	5,679		$	5,881
Savings	2,325			6,791			9,116			3,311			21,888			25,199
Money market	6,028			4,068			10,096			3,527			10,581			14,108
Certificates of deposit	11,616			7,307			18,923			6,865			22,873			29,738
Interest-bearing deposits	20,404			23,017			43,421			13,905			61,021			74,926
Short-term borrowings	5,342			(18		)	5,324			9,401			(26		)	9,375
Long-term borrowings	940			124			1,064			2,516			4,308			6,824
Total interest-bearing liabilities	$	26,686		$	23,123		$	49,809		$	25,822		$	65,303		$	91,125
Total change in net interest income (FTE)(2)	$	154,052		$	(35,385	)	$	118,667		$	176,316		$	(52,101	)	$	124,215

(1) Changes attributable to the combined impact of volume and rate have been allocated proportionately to the change due to volume and the change due to rate.

(2) FTE basis using a federal income tax rate of 21% for the three and nine months ended September 30, 2019 and 2018. The presentation of net interest income on a FTE basis is not in accordance with GAAP, but is customary in the banking industry.

Provision for Credit Losses The provision for credit losses was $27.2 million and $50.9 million for the three and nine months ended September 30, 2019, respectively, compared with $2.3 million and $27.9 million for the same periods in 2018. The increases from both the three and nine months ended September 30, 2018 were primarily due to an increase in commercial and industrial net charge-offs in the three and nine months ended September 30, 2019 primarily due to one loan relationship. The provision for credit losses is predominantly a function of our reserving methodology used to determine the appropriate level of the allowance for loan and lease losses, which is a critical accounting estimate.

An analysis of the allowance for loan and leases losses is presented under "Consolidated Financial Condition Analysis — Credit Quality" in this Management's Discussion and Analysis.

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Noninterest Income The components of noninterest income were as follows:

	Three Months Ended September 30,						Change
(Dollars in thousands)	2019			2018			$			% / bps
Fees and service charges on deposit accounts	$	34,384		$	29,175		$	5,209		17.9	%
Leasing revenue	39,590			41,944			(2,354		)	(5.6	)
Wealth management revenue	4,241			—			4,241			N.M.
Card and ATM revenue	23,315			20,074			3,241			16.1
Net (losses) gains on sales of loans and leases	(5,984		)	8,502			(14,486		)	N.M.
Servicing fee revenue	5,121			6,032			(911		)	(15.1	)
Net gains (losses) on investment securities	5,900			94			5,806			N.M.
Other	(12,309		)	6,243			(18,552		)	N.M.
Total noninterest income	$	94,258		$	112,064		$	(17,806	)	(15.9	)
Total noninterest income as a percentage of total revenue	20.2		%	30.7		%				(1,050) bps
	Nine Months Ended September 30,						Change
(Dollars in thousands)	2019			2018			$			%
Fees and service charges on deposit accounts	$	88,504		$	83,703		$	4,801		5.7	%
Leasing revenue	117,032			121,001			(3,969		)	(3.3	)
Wealth management revenue	4,241			—			4,241			N.M.
Card and ATM revenue	62,470			58,313			4,157			7.1
Net (losses) gains on sales of loans and leases	13,374			24,900			(11,526		)	(46.3	)
Servicing fee revenue	14,754			21,811			(7,057		)	(32.4	)
Net gains (losses) on investment securities	7,417			181			7,236			N.M.
Other	(312		)	20,620			(20,932		)	N.M.
Total noninterest income	$	307,480		$	330,529		$	(23,049	)	(7.0	)
Total noninterest income as a percentage of total revenue	25.9		%	30.4		%				(450) bps

N.M. Not Meaningful

Noninterest income was $94.3 million and $307.5 million in the three and nine months ended September 30, 2019, compared to $112.1 million and $330.5 million for the same periods in 2018. Following the Merger, we repositioned our balance sheet to lower our risk profile, reduce asset sensitivity and enhance capital and efficiency. As a result, noninterest income included the following balance sheet repositioning actions considered to be non-core items in the three and nine months ended September 30, 2019: a $19.3 million loss related to the transfer of the Legacy TCF auto finance portfolio to held-for-sale (net (losses) gains on sales of loans and leases), a $17.3 million loss related to the termination of interest rate swaps (other noninterest income) and a gain of $5.9 million related to the sale of $1.6 billion of certain investment securities (net gains on investment securities). Noninterest income in the three and nine months ended September 30, 2019 additionally included $4.5 million of loan servicing rights impairment (other noninterest income), also considered a non-core item. Excluding the non-core items, adjusted noninterest income, a non-GAAP financial measure, was $129.5 million and $342.7 million in the three and nine months ended September 30, 2019, compared to $112.1 million and $330.5 million for the same periods in 2018. See "Non-GAAP Financial Measures" in this Management's Discussion and Analysis for further information.

Fees and service charges on deposit accounts Fees and service charges on deposit accounts were $34.4 million and $88.5 million for the three and nine months ended September 30, 2019, respectively, compared with $29.2 million and $83.7 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily attributable to incremental fees resulting from the Merger.

Leasing revenue Leasing revenue was $39.6 million and $117.0 million for the three and nine months ended September 30, 2019, respectively, compared with $41.9 million and $121.0 million for the same periods in 2018. The decrease from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to decreases in operating lease revenue and sales-type lease revenue.

Wealth management Wealth management revenue is comprised of investment fees that are generally based on the market value of assets within a trust account, custodial fees and fees from the sale of investment products. Revenues from wealth management were $4.2 million for both the three and nine months ended September 30, 2019. Wealth management revenues are a new revenue stream as a result of the Merger.

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Card and ATM revenue Card and ATM revenue was $23.3 million and $62.5 million for the three and nine months ended September 30, 2019, respectively, compared with $20.1 million and $58.3 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to incremental revenue resulting from the Merger.

Net (losses) gains on sales of loans and leases Net losses on sales of loans and leases were $6.0 million and a net gains of $13.4 million for the three and nine months ended September 30, 2019, respectively, compared with net gains of $8.5 million and $24.9 million for the same periods in 2018. The decreases in the three and nine months ended September 30, 2019, compared to the same periods in 2018, were primarily due to a $19.3 million loss related to the transfer of the Legacy TCF auto finance portfolio to held-for-sale. Excluding the loss related to the auto finance portfolio transfer, the increase from both the three and nine months ended September 30, 2018 was primarily due to higher volume of consumer loans sold resulting from the Merger. We sold $457.9 million and $1.0 billion of consumer real estate loans during the three and nine months ended September 30, 2019, respectively, compared with $391.8 million and $908.2 million during the same periods in 2018.

Servicing fee revenue Servicing fee revenue was $5.1 million and $14.8 million for the three and nine months ended September 30, 2019, respectively, compared with $6.0 million and $21.8 million for the same periods in 2018. The decrease from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to the continued run-off in the auto finance serviced for others portfolio, partially offset by the incremental revenue to the servicing portfolio resulting from the Merger.

Net gains (losses) on investment securities Net gains on investment securities were $5.9 million and $7.4 million for the three and nine months ended September 30, 2019, respectively, compared with $0.1 million and $0.2 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to a gain of $5.9 million related to the sale of $1.6 billion of investment securities resulting from the balance sheet repositioning following the completion of the Merger.

Other Other noninterest income was a loss of $12.3 million and a loss of $0.3 million for the three and nine months ended September 30, 2019, respectively, compared with income of $6.2 million and income of $20.6 million for the same periods in 2018. The decrease from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to a $17.3 million loss related to the termination of interest rate swaps and the recognition of $4.5 million of loan servicing rights impairment, partially offset by an increase in incremental revenue resulting from the Merger.

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Noninterest Expense The components of noninterest expense were as follows:

	Three Months Ended September 30,						Change
(Dollars in thousands)	2019			2018			$			% / bps
Compensation and employee benefits	$	155,745		$	124,996		$	30,749		24.6	%
Occupancy and equipment	49,229			42,337			6,892			16.3
Lease financing equipment depreciation	19,408			19,525			(117		)	(0.6	)
Net foreclosed real estate and repossessed assets	2,203			3,880			(1,677		)	(43.2	)
Merger-related expenses	111,259			—			111,259			N.M.
Other	87,776			55,685			32,091			57.6
Total noninterest expense	$	425,620		$	246,423		$	179,197		72.7
Full-time equivalent staff (at period end)	7,374			4,872			2,502			51.4
Efficiency ratio	91.32		%	67.41		%				2,391	bps
Adjusted efficiency ratio, Non-GAAP(1)	58.74			64.91						(617	)
	Nine Months Ended September 30,						Change
(Dollars in thousands)	2019			2018			$			%
Compensation and employee benefits	$	395,953		$	372,174		$	23,779		6.4	%
Occupancy and equipment	132,789			123,562			9,227			7.5
Lease financing equipment depreciation	57,797			54,744			3,053			5.6
Net foreclosed real estate and repossessed assets	9,281			12,654			(3,373		)	(26.7	)
Merger-related expenses	124,943			—			124,943			N.M.
Other	194,781			201,308			(6,527		)	(3.2	)
Total noninterest expense	$	915,544		$	764,442		$	151,102		19.8
Efficiency ratio	77.08		%	70.40		%				668	bps
Adjusted efficiency ratio, Non-GAAP(1)	61.57			65.08						(351	)

N.M. Not Meaningful

(1) See "Consolidated Financial Condition Analysis - Non-GAAP Financial Measures" in this Management's Discussion and Analysis for further information.

Compensation and employee benefits expense Compensation and employee benefits expense was $155.7 million and $396.0 million for the three and nine months ended September 30, 2019, respectively, compared with $125.0 million and $372.2 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to the staff additions resulting from the Merger.

Occupancy and equipment Occupancy and equipment expense was $49.2 million and $132.8 million for the three and nine months ended September 30, 2019, respectively, compared with $42.3 million and $123.6 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to the incremental operating costs associated with the Merger.

Lease financing equipment depreciation Lease financing equipment depreciation was $19.4 million and $57.8 million for the three and nine months ended September 30, 2019, respectively, compared with $19.5 million and $54.7 million for the same periods in 2018. Shifts in lease financing equipment depreciation are the result of changes in balances of leased equipment.

Net foreclosed real estate and repossessed assets Net foreclosed real estate and repossessed assets expense was $2.2 million and $9.3 million for the three and nine months ended September 30, 2019, respectively, compared with $3.9 million and $12.7 million for the same periods in 2018.

Merger-related expenses Merger-related expenses related to the Merger were $111.3 million and $124.9 million for the three and nine months ended September 30, 2019, respectively, and consisted primarily of professional fees and employment related expenses.

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Other noninterest expense Other noninterest expense was $87.8 million and $194.8 million for the three and nine months ended September 30, 2019, respectively, compared with $55.7 million and $201.3 million for the same periods in 2018. The increase from the three months ended September 30, 2018 was primarily due to a $5.9 million expense related to the write-down of company-owned vacant land parcels and incremental costs associated with the Merger. The decrease from the nine months ended September 30, 2018 was primarily due to the $32.0 million settlement with the CFPB and OCC, partially offset by the $5.9 million expense related to the write-down of company-owned vacant land parcels and incremental costs due to the Merger.

Income Tax (Benefit) Expense Income tax benefit was $11.7 million and expense was $28.9 million, or 13.0% of income before income tax expense, for the three and nine months ended September 30, 2019, respectively, compared with expense of $28.0 million, or 24.0% of income before income tax expense, and expense of $66.1 million, or 22.5% of income before income tax expense, for the same periods in 2018. The three and nine months ended September 30, 2019 included an $8.0 million tax basis adjustment benefit in addition to a $5.7 million benefit provided by the repricing of TCF's net deferred tax position in connection with the completion of the Merger. The fluctuations in TCF's effective income tax rate reflect changes each period in the proportion of interest income exempt from federal taxation, nondeductible transaction costs and other nondeductible expenses relative to pretax income and tax credits.

Reportable Segment Results In connection with the Merger, effective August 1, 2019, we renamed our Wholesale Banking segment to Commercial Banking to align with the way we are now managed. In addition, activity that was related to small business banking and private banking were moved from the Wholesale Banking (now named Commercial Banking) segment to the Consumer Banking segment. The revised presentation of previously reported segment data has been applied retroactively to all periods presented in these financial statements. Our reportable segments are Consumer Banking, Commercial Banking and Enterprise Services. Due to the timing of the Merger, TCF is in the process of completing its analysis of the allocation of the goodwill across business segments, therefore goodwill is presented as part of Enterprise Services at September 30, 2019. See Note 25. Reportable Segments of the Notes to Consolidated Financial Statements for further information regarding net income (loss), revenues and assets for each of our reportable segments.

Consumer Banking

Consumer Banking is comprised of all of the consumer and small business-facing businesses and includes Retail Banking, Wealth Management, Residential Lending, Consumer Lending and Business Banking. Our consumer banking strategy is primarily to generate deposits and originate high credit quality loans for investment and sale. Deposits are generated from consumers and small businesses to provide a source of low cost funds, with a focus on building and maintaining quality customer relationships.

Consumer Banking generated net income available to common shareholders of $27.0 million and $91.6 million for the three and nine months ended September 30, 2019, respectively, compared with $36.9 million and $72.1 million for the same periods in 2018.

Consumer Banking net interest income was $191.9 million and $470.7 million for the three and nine months ended September 30, 2019, respectively, compared with $143.0 million and $429.1 million for the same periods in 2018. The increase in net interest income from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily attributable to the impact of the loans acquired in the Merger, partially offset by the deposits acquired in the Merger.

Consumer Banking provision for credit losses was $4.5 million and $16.4 million for the three and nine months ended September 30, 2019, respectively, compared with a benefit of $953 thousand and a provision of $18.9 million for the same periods in 2018. The increase from the three months ended September 30, 2018 was primarily due to a decrease in recoveries on previous charge-offs related to consumer loans. The decrease from the nine months ended September 30, 2018 was primarily due to a decrease in the provision for credit losses attributable to run-off and maturation of the auto finance portfolio. The provision for credit losses is predominantly a function of our reserving methodology used to determine the appropriate level of the allowance for loan and lease losses. For further information, see "Consolidated Income Statement Analysis — Provision for Credit Losses" and "Consolidated Financial Condition Analysis — Credit Quality" in this Management's Discussion and Analysis and Note 7. Allowance for Loan and Lease Losses and Credit Quality of the Notes to Consolidated Financial Statements.

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Consumer Banking noninterest income was $57.1 million and $183.8 million for the three and nine months ended September 30, 2019, respectively, compared with $66.6 million and $196.8 million for the same periods in 2018. The decrease in noninterest income from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to a $19.3 million loss related to the transfer of the Legacy TCF auto finance portfolio to held-for-sale. Excluding the loss related to the auto finance portfolio transfer, the increase from both the three and nine months ended September 30, 2018 was primarily due to a higher volume of consumer loans sold resulting from the Merger. Servicing fee income attributable to the Consumer Banking segment was $32.4 million and $84.3 million for the three and nine months ended September 30, 2019, respectively, compared with $28.1 million and $80.6 million for the same periods in 2018. Average Consumer Banking loans serviced for others were $6.9 billion and $4.4 billion for the three and nine months ended September 30, 2019, respectively, compared with $3.3 billion and $3.7 billion for the same periods in 2018.

Consumer Banking noninterest expense was $210.7 million and $520.0 million for the three and nine months ended September 30, 2019, respectively, compared with $162.0 million and $511.9 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to the incremental operating cost due to the Merger.

Commercial Banking

Commercial Banking is comprised of commercial banking, leasing and equipment finance, and inventory finance. Our wholesale banking strategy is primarily to originate high credit quality secured loans and leases for investment.

Commercial Banking generated net income available to common shareholders of $68.8 million and $142.4 million for the three and nine months ended September 30, 2019, respectively, compared with $42.6 million and $134.8 million for the same periods in 2018.

Commercial Banking net interest income was $157.4 million and $350.8 million for the three and nine months ended September 30, 2019, respectively, compared with $94.3 million and $289.3 million for the same periods in 2018. The increase in net interest income from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to the impact of the loans acquired in the Merger, partially offset by the deposits acquired in the Merger.

Commercial Banking provision for credit losses was $22.7 million and $34.5 million for the three and nine months ended September 30, 2019, respectively, compared with $3.2 million and $9.0 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to an increase in commercial and industrial net charge-offs in the three months ended September 30, 2019 primarily resulting from one loan relationship. The provision for credit losses is predominantly a function of our reserving methodology used to determine the appropriate level of the allowance for loan and lease losses. For further information, see "Consolidated Income Statement Analysis — Provision for Credit Losses" and "Consolidated Financial Condition Analysis — Credit Quality" in this Management's Discussion and Analysis and Note 7. Allowance for Loan and Lease Losses and Credit Quality of the Notes to Consolidated Financial Statements.

Commercial Banking noninterest income was $47.9 million and $132.9 million for the three and nine months ended September 30, 2019, respectively, compared with $44.9 million and $132.8 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to incremental revenue resulting from the Merger, partially offset by a decrease in leasing and equipment finance noninterest income as a result of decreased operating lease revenue and sales-type lease revenue.

Commercial Banking noninterest expense was $102.8 million and $267.1 million for the three and nine months ended September 30, 2019, respectively, compared with $77.9 million and $229.1 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to an increase in merger-related expenses and other expenses related to the incremental costs due to the Merger.

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Enterprise Services

Enterprise Services is comprised of (i) corporate treasury, which includes our investment and borrowing portfolios and management of capital, debt and market risks, (ii) corporate functions, such as information technology, risk and credit management, bank operations, finance, investor relations, corporate development, internal audit, legal and human capital management that provide services to the operating segments, (iii) the Holding Company and (iv) eliminations. Our investment portfolio accounts for our earning assets within this segment. Borrowings may be used to offset reductions in deposits or to support lending activities. This segment also includes residual revenues and expenses representing the difference between actual amounts incurred by Enterprise Services and amounts allocated to the operating segments, including interest rate risk residuals such as funds transfer pricing mismatches.

Enterprise Services generated net loss available to common shareholders of $76.2 million and $58.4 million for the three and nine months ended September 30, 2019, respectively, compared with net income available to common shareholders of $4.1 million and a net loss available to common shareholders of $0.7 million for the same periods in 2018.

Enterprise Services net interest income was $22.4 million and $58.7 million for the three and nine months ended September 30, 2019, respectively, compared with $16.2 million and $36.9 million for the same periods in 2018. The increase in from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to the increase in average balances of investment securities acquired in the Merger.

Enterprise Services noninterest expense was $112.1 million and $128.4 million for the three and nine months ended September 30, 2019, respectively, compared with $6.5 million and $23.4 million for the same periods in 2018. The increase from the three months ended September 30, 2018 and from the nine months ended September 30, 2018 was primarily due to an increase in merger-related expenses and other expenses related to the incremental costs due to the Merger.

Preferred stock dividends were $2.5 million and $7.5 million for the three and nine months ended September 30, 2019, respectively, compared with $2.5 million and $9.1 million for preferred stock dividends and the impact of the preferred stock redemption for the same periods in 2018. The decrease was due to the redemption of the 6.45% Series B non-cumulative perpetual preferred stock in the first quarter of 2018.

Consolidated Financial Condition Analysis

Investment Securities Total investment securities available-for-sale, at fair value, were $5.6 billion at September 30, 2019, compared with $2.5 billion at December 31, 2018. Our investment securities available-for-sale are debt securities consisting primarily of fixed-rate mortgage-backed securities issued by the Federal National Mortgage Association ("FNMA") and the Federal Home Loan Mortgage Corporation ("FHLMC"), and obligations of states and political subdivisions. Total investment securities held-to-maturity were $144.0 million at September 30, 2019, compared with $148.9 million at December 31, 2018. Our investment securities held-to-maturity portfolio consists primarily of fixed-rate mortgage-backed securities issued by the FNMA. The increase in investment securities was primarily due to the addition of $3.8 billion of investment securities as a result of the Merger, partially offset by the subsequent sale of $1.6 billion of investment securities during the three months ended September 30, 2019 as we repositioned our balance sheet. See Note 2. Merger for further information. We may, from time to time, sell investment securities available-for-sale and utilize the proceeds to reduce borrowings, fund growth in loans and leases or for other corporate purposes. We sold $1.6 billion and $2.0 billion of investment securities during the three and nine months ended September 30, 2019, respectively, which included select floating rate, corporate, non-agency and municipal securities. There were no sales of available-for-sale investment securities during the three and nine months ended September 30, 2018.

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The carrying value of investment securities available-for-sale and held-to-maturity were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Investment securities available-for-sale, at fair value
Debt securities:
Government and government-sponsored enterprises	$	247,147	$	—
Obligations of states and political subdivisions	789,671		556,871
Mortgage-backed securities	4,542,592		1,913,194
Corporate debt and trust preferred securities	425		—
Total debt securities available-for-sale	5,579,835		2,470,065
Total investment securities available-for-sale	5,579,835		2,470,065
Investment securities held-to-maturity
Mortgage-backed securities	140,324		146,052
Corporate debt and trust preferred securities	3,676		2,800
Total investment securities held-to-maturity	144,000		148,852
Total investment securities	$	5,723,835	$	2,618,917

The carrying value and FTE yield of investment securities available-for-sale and investment securities held-to-maturity by final contractual maturity were as follows. The final contractual maturities do not consider possible prepayments and therefore expected maturities may differ because borrowers may have the right to prepay.

	At September 30, 2019
	Government and Government-sponsored Enterprises				Obligations of States and Political Subdivisions				Mortgage-backed Securities				Corporate Debt And Trust Preferred Securities				Total
(Dollars in thousands)	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield
Investment securities available-for-sale
Due in one year or less	$	—	—	%	$	60,652	2.23	%	$	—	—	%	$	—	—	%	$	60,652	2.23	%
Due in 1-5 years	—		—		169,736		2.61		29,663		1.93		—		—		199,399		2.51
Due in 5-10 years	27,186		3.60		161,469		2.76		304,100		2.60		—		—		492,755		2.71
Due after 10 years	219,961		3.44		397,814		2.89		4,208,829		2.95		425		6.87		4,827,029		2.97
Total	$	247,147	3.46		$	789,671	2.75		$	4,542,592	2.92		$	425	6.87		$	5,579,835	2.92
Investment securities held-to-maturity
Due in one year or less	$	—	—	%	$	—	—	%	$	—	—	%	$	—	—	%	$	—	—	%
Due in 1-5 years	—		—		—		—		—		—		3,150		2.82		3,150		2.82
Due in 5-10 years	—		—		—		—		60		6.50		400		3.00		460		3.46
Due after 10 years	—		—		—		—		140,264		2.47		126		6.00		140,390		2.47
Total	$	—	—		$	—	—		$	140,324	2.47		$	3,676	2.95		$	144,000	2.48

See Note 6. Investment Securities of Notes to Consolidated Financial Statements for further information regarding our investment securities available-for-sale and investment securities held-to-maturity.

Loans and Leases Held-for-Sale

Our loans and leases held-for-sale were $1.4 billion at September 30, 2019, an increase of $1.3 billion, compared to $90.7 million at December 31, 2018. The increase was primarily due to the transfer of $1.2 billion of Legacy TCF auto finance portfolio to held-for-sale.

Loans and Leases 

Our commercial loan and lease portfolio is comprised of commercial and industrial loans, commercial real estate loans, and lease financing. Our consumer loan portfolio is comprised of residential mortgages, consumer installment loans and home equity loans and lines of credit. Our lending markets generally consist of communities throughout our primary banking markets including Michigan, Minnesota, Illinois, Ohio, Indiana, Colorado, Wisconsin, Arizona and South Dakota.

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Total loans and leases were $33.5 billion at September 30, 2019, an increase of $14.4 billion, or 75.7%, compared to December 31, 2018. The increase was primarily due to $15.7 billion of loans and leases acquired in the Merger, partially offset by the transfer of the Legacy TCF auto finance portfolio to held-for-sale which had a balance of $1.2 billion at September 30, 2019.

Information about our loans and leases was as follows:

	At September 30, 2019				At December 31, 2018				Change
(Dollars in thousands)	Amount		% of Total		Amount		% of Total		$			%
Commercial loan and lease portfolio:
Commercial and industrial	$	10,810,534	32.3	%	$	6,220,632	32.6	%	$	4,589,902		73.8	%
Commercial real estate	8,876,779		26.5		2,908,313		15.2		5,968,466			205.2
Lease financing	2,594,373		7.7		2,530,163		13.3		64,210			2.5
Total commercial loan and lease portfolio	22,281,686		66.5		11,659,108		61.1		10,622,578			91.1
Consumer loan portfolio:
Residential mortgage	6,057,404		18.0		2,335,835		12.2		3,721,569			159.3
Consumer installment	1,562,252		4.7		2,003,572		10.5		(441,320		)	(22.0	)
Home equity	3,609,410		10.8		3,074,505		16.2		534,905			17.4
Total consumer loan portfolio	11,229,066		33.5		7,413,912		38.9		3,815,154			51.5
Total loans and leases	$	33,510,752	100.0	%	$	19,073,020	100.0	%	$	14,437,732		75.7	%

Commercial Loan and Lease Portfolio

Our commercial loan and lease portfolio was $22.3 billion at September 30, 2019, an increase of $10.6 billion, or 91.1%, compared to $11.7 billion at December 31, 2018, primarily due to the $9.8 billion of commercial loans and leases acquired as a result of the Merger. Our commercial loan and lease portfolio is well diversified across business lines and has no concentration in any one industry.

Commercial and industrial Commercial and industrial loans and lines of credit include loans to varying types of businesses, including equipment dealers, municipalities, school districts and nonprofit organizations, for the purpose of supporting working capital and operational needs and term financing of equipment. Commercial and industrial loans are secured by various types of business assets including inventory, floorplan equipment, receivables, equipment or financial instruments. Origination levels related to equipment dealers are impacted by the velocity of fundings and repayments with dealers.

Commercial real estate Commercial real estate loans include loans that are secured by real estate occupied by the borrower for ongoing operations, non-owner occupied real estate leased to one or more tenants and construction and development loans primarily originated for construction of commercial properties. Construction and development loans often convert to a commercial real estate loan at the completion of the construction period. Commercial real estate loans are primarily secured by commercial real estate, including multi-family housing, office buildings, health care facilities, warehouse and industrial buildings, hotel and motel buildings, self-storage buildings and retail services buildings.

Lease financing We provide a broad range of comprehensive lease products addressing the diverse financing needs of small to large companies in a growing number of select market segments including specialty vehicles, construction equipment, golf cart and turf equipment, manufacturing equipment, medical equipment, trucks and trailers, furniture and fixtures, technology and data processing equipment and agriculture equipment. The uninstalled backlog of approved transactions was $626.3 million at September 30, 2019, compared with $572.4 million at December 31, 2018.

Consumer Loan Portfolio

Our consumer loan portfolio was $11.2 billion at September 30, 2019, an increase of $3.8 billion, or 51.5%, compared to $7.4 billion at December 31, 2018, primarily due to $5.9 billion of consumer loans acquired as a result of the Merger, partially offset by the $1.2 billion of Legacy TCF auto loan portfolio transferred to held-for-sale.

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Residential mortgage Residential mortgage loans consist primarily of one- to four-family residential loans with fixed and adjustable interest rates, with amortization periods generally from 15 to 30 years. The loan-to-value ratio at the time of origination is generally 90% or less. Loans with more than an 80% loan-to-value ratio generally require private mortgage insurance. Residential mortgage loans also include loans to consumers for the construction of single family residences that are secured by these properties.

Consumer installment Consumer installment loans consist of relatively small loan amounts to consumers to finance personal items (primarily automobiles, recreational vehicles and marine vehicles) and are comprised primarily of indirect loans purchased from dealerships. Consumer rates are both fixed and variable, with negotiable terms. Our consumer installment loans typically amortize over periods up to 60 months. Consumer loans not secured by real estate are generally considered to have greater risk than first or second mortgages on real estate because they may be unsecured, or, if they are secured, the value of the collateral may be difficult to assess and more likely to decrease in value, and is more difficult to control, than real estate.

Home equity Home equity loans and lines of credit are comprised of loans to consumers who utilize equity in their personal residence, including junior lien mortgages, as collateral to secure the loan or line-of-credit. The majority of our home equity lines of credit are comprised of loans with a 10-year interest-only draw period and a 20-year amortization repayment period. These home equity lines of credit can include junior lien mortgages whereby the first lien mortgage is held by a nonaffiliated financial institution.

Credit Quality The following summarizes our loan and lease portfolio based on the credit quality factors that we believe are important and should be considered to understand the overall condition of our loan portfolios. See Note 8. Allowance for Loan and Lease Losses and Credit Quality of Notes to Consolidated Financial Statements for further information.

Past Due Loans and Leases Over 90-day delinquent loans and leases by type, excluding nonaccrual loans and leases, were as follows. Delinquent balances are determined based on the contractual terms of the loan or lease.

	At September 30, 2019				At December 31, 2018
(Dollars in thousands)	90 Days or More Delinquent and Accruing(1)		Percentage of Period-end Loans and Leases		90 Days or More Delinquent and Accruing(1)		Percentage of Period-end Loans and Leases
Commercial loan and lease portfolio:
Commercial and industrial	$	2,241	0.02	%	$	760	0.01	%
Commercial real estate	8,054		0.09		—		—
Lease financing	2,421		0.09		1,882		0.07
Total commercial loan and lease portfolio	12,716		0.06		2,642		0.02
Consumer loan portfolio:
Residential mortgage	886		0.01		1,275		0.06
Consumer installment	6		—		3,349		0.17
Total consumer loan portfolio	892		0.01		4,624		0.06
Portfolios acquired with deteriorated credit quality	16,052		5.47		178		4.65
Total	$	29,660	0.09	%	$	7,444	0.04	%

(1) Excludes nonaccrual loans and leases

Loan Modifications Troubled debt restructuring ("TDR") loans were as follows:

	At September 30, 2019							At December 31, 2018
(Dollars in thousands)	Accruing TDR Loans			Nonaccrual TDR Loans		Total TDR Loans		Accruing TDR Loans			Nonaccrual TDR Loans		Total TDR Loans
Commercial loan and lease portfolio	$	10,068		$	1,953	$	12,021	$	12,665		$	6,153	$	18,818
Consumer loan portfolio	75,836			19,284		95,120		85,794			22,554		108,348
Total	$	85,904		$	21,237	$	107,141	$	98,459		$	28,707	$	127,166
Over 90-day delinquency as a percentage of total accruing TDR loans	34.53		%	N.A.		N.A.		7.56		%	N.A.		N.A.

N.A. Not Applicable

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Loan modifications to borrowers who have not been granted concessions are not considered TDR loans and therefore are not included in the table above. TDR loans with an interest rate consistent with market rates on loans with comparable risk at the time of restructuring and performing based on the restructured terms are no longer disclosed as TDR loans in the calendar years after modification; however, these loans are still considered impaired and follow our impaired loan reserve policies.

TDRs typically involve a deferral of the principal balance of the loan, a reduction of the stated interest rate of the loan or, in certain limited circumstances, a reduction of the principal balance of the loan or the loan's accrued interest.

Nonperforming Assets Nonperforming assets, consisting of nonaccrual loans and leases and other real estate owned, were as follows:

(Dollars in thousands)	At September 30, 2019			At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	55,039		$	26,061
Commercial real estate	26,518			4,518
Lease financing	11,503			7,993
Total commercial loan and lease portfolio	93,060			38,572
Consumer loan portfolio:
Residential mortgage	48,816			33,111
Consumer installment	636			8,581
Home equity	39,296			25,654
Total consumer loan portfolio	88,748			67,346
Nonaccrual loans and leases	181,808			105,918
Other real estate owned	27,638			17,403
Total nonperforming assets	$	209,446		$	123,321
Nonaccrual loans and leases as a percentage of total loans and leases	0.54		%	0.56		%
Nonperforming assets as a percentage of total loans and leases and other real estate owned	0.62			0.65
Allowance for loan and lease losses as a percentage of nonaccrual loans and leases	66.67			148.65

Nonperforming assets were $209.4 million at September 30, 2019, compared with $123.3 million at December 31, 2018. The increase was primarily due to loans acquired in the Merger.

Loans and leases are generally placed on nonaccrual status when the collection of interest or principal is 90 days or more past due unless, in the case of commercial loans, they are well secured and in process of collection. Delinquent consumer real estate home equity loans with a junior lien position are also placed on nonaccrual status when there is evidence that the related third-party first lien mortgage may be 90 days or more past due, or foreclosure, charge-off or collection action has been initiated. TDR loans are placed on nonaccrual status prior to the past due thresholds outlined above if repayment under the modified terms is not likely after performing a well-documented credit analysis. Loans on nonaccrual status are generally reported as nonaccrual loans until there is sustained repayment performance for six consecutive months, with the exception of loans not reaffirmed upon discharge under Chapter 7 bankruptcy, which remain on nonaccrual status until a well-documented credit analysis indicates full repayment of the remaining pre-discharged contractual principal and interest is likely. We do not classify PCI loans as nonaccrual loans because the loans are recorded at net realizable value based on the principal and interest expected to be collected on the loan.

The majority of our nonaccrual loans are secured by real estate. Given the nature of these assets and the related mortgage foreclosure, property sale and, if applicable, mortgage insurance claims processes, it can take 18 months or longer for a loan to migrate from initial delinquency to final disposition. This resolution process generally takes much longer for loans secured by real estate than for unsecured loans or loans secured by other property primarily due to state real estate foreclosure laws.

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Changes in the amount of nonaccrual loans and leases were as follows:

	At or For the Three Months Ended September 30, 2019
(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total
Balance, beginning of period	$	76,079		$	31,914		$	107,993
Acquired	16,414			64,830			81,244
Additions	24,592			54,059			78,651
Charge-offs	(2,020		)	(18,257		)	(20,277		)
Transfers to other assets	(5,227		)	(4,294		)	(9,521		)
Transfers (to) from loans and leases held for sale	(9,454		)	—			(9,454		)
Return to accrual status	(3,048		)	(10,419		)	(13,467		)
Payments received	(8,597		)	(25,274		)	(33,871		)
Other, net	9			501			510
Balance, end of period	$	88,748		$	93,060		$	181,808
	At or For the Nine Months Ended September 30, 2019
(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total
Balance, beginning of period	$	67,346		$	38,572		$	105,918
Acquired	16,414			64,830			81,244
Additions	60,875			94,190			155,065
Charge-offs	(6,407		)	(29,693		)	(36,100		)
Transfers to other assets	(14,530		)	(12,174		)	(26,704		)
Transfers (to) from loans and leases held-for-sale	(9,454		)	—			(9,454		)
Return to accrual status	(6,443		)	(17,636		)	(24,079		)
Payments received	(18,676		)	(48,000		)	(66,676		)
Other, net	(377		)	2,971			2,594
Balance, end of period	$	88,748		$	93,060		$	181,808

Loan and Lease Credit Classifications We assess the risks in our loan and lease portfolio utilizing numerous risk characteristics as outlined in the previous sections. Credit classifications are an additional characteristic monitored in the overall credit risk process. Loan and lease credit classifications are derived from standard regulatory rating definitions, which include: non-classified (pass and special mention) and classified (substandard and doubtful). Classified loans and leases have well-defined weaknesses, but may never result in a loss.

Loans and leases by portfolio and regulatory classification were as follows:

	At September 30, 2019
	Non-classified				Classified				Total
(In thousands)	Pass		Special Mention		Substandard		Doubtful
Commercial loan and lease portfolio:
Commercial and industrial	$	10,307,229	$	309,440	$	193,865	$	—	$	10,810,534
Commercial real estate	8,645,910		150,132		80,737		—		8,876,779
Lease financing	2,540,637		27,007		26,729		—		2,594,373
Total commercial loan and lease portfolio	21,493,776		486,579		301,331		—		22,281,686
Consumer loan portfolio:
Residential mortgage	6,001,380		1,543		54,481		—		6,057,404
Consumer installment	1,561,506		—		746		—		1,562,252
Home equity	3,565,763		1,284		42,363		—		3,609,410
Total consumer loan portfolio	11,128,649		2,827		97,590		—		11,229,066
Total loans and leases	$	32,622,425	$	489,406	$	398,921	$	—	$	33,510,752

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	At December 31, 2018
	Non-classified				Classified				Total
(In thousands)	Pass		Special Mention		Substandard		Doubtful
Commercial loan and lease portfolio:
Commercial and industrial	$	5,955,713	$	158,296	$	106,623	$	—	6,220,632
Commercial real estate	2,869,711		12,864		25,738		—		2,908,313
Lease financing	2,480,964		25,195		24,004		—		2,530,163
Total commercial loan and lease portfolio	11,306,388		196,355		156,365		—		11,659,108
Consumer loan portfolio:
Residential mortgage	2,294,740		3,606		37,489		—		2,335,835
Consumer installment	1,981,844		1,302		20,426		—		2,003,572
Home equity	3,043,296		3,747		27,462		—		3,074,505
Total consumer loan portfolio	7,319,880		8,655		85,377		—		7,413,912
Total loans and leases	$	18,626,268	$	205,010	$	241,742	$	—	$	19,073,020

Total classified loans and leases in the commercial loan and lease portfolio were $398.9 million at September 30, 2019, compared with $241.7 million at December 31, 2018. The increase was primarily due to loans acquired in the Merger.

Allowance for Loan and Lease Losses  The determination of the allowance for loan and lease losses is a critical accounting estimate. Our evaluation of incurred losses is based on historical loss rates multiplied by the respective portfolio's loss emergence period. Factors we use in the determination of the amount of the allowance include historical trends in loss rates, a portfolio's overall risk characteristics, changes in its character or size, risk rating migration, delinquencies, collateral values, economic outlook and prevailing economic conditions. We review the various factors used in our methodologies on a periodic basis.

The allowance for loan and leases losses on loans and leases acquired in the Merger was not carried over on the Merger Date. Instead, the acquired loans and leases were recorded at their estimated fair including a component for expected credit losses.

We consider our allowance for loan and lease losses of $121.2 million appropriate to cover losses incurred in the loan and lease portfolios at September 30, 2019. However, no assurance can be given that we will not, in any particular period, sustain loan and lease losses that are sizable in relation to the amount reserved or will not require significant changes in the balance of the allowance for loan and lease losses due to subsequent evaluations of the loan and lease portfolios, in light of factors then prevailing, including economic conditions, information obtained during our ongoing credit review process or regulatory requirements. Among other factors, an economic slowdown, increasing levels of unemployment, a decline in collateral values and/or rising interest rates may have an adverse impact on the current adequacy of our allowance for loan and lease losses by increasing credit risk and the risk of potential loss.

The total allowance for loan and lease losses is expected to absorb losses from any segment of the portfolio. The allocation of our allowance for loan and lease losses disclosed in the following table is subject to change based on changes in the criteria used to evaluate the allowance and is not necessarily indicative of the trend of future losses in any particular portfolio.

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Detailed Information regarding our allowance for loan and lease losses was as follows:

	At September 30, 2019				At December 31, 2018
	Credit Loss Reserves				Credit Loss Reserves
(Dollars in thousands)	Amount		As a Percentage of Portfolio		Amount		As a Percentage of Portfolio
Commercial loan and lease portfolio:
Commercial and industrial	$	39,974	0.37	%	$	41,103	0.66	%
Commercial real estate	24,090		0.27		22,877		0.79
Lease financing	14,367		0.55		13,449		0.53
Total commercial loan and lease portfolio	78,431		0.35		77,429		0.66
Consumer loan portfolio:
Residential mortgage	19,816		0.33		21,436		0.92
Consumer installment	1,859		0.12		35,151		1.75
Home equity	21,112		0.58		23,430		0.76
Total consumer loan portfolio	42,787		0.38		80,017		1.08
Total allowance for loan and lease losses	121,218		0.36		157,446		0.83
Credit discount on acquired loans	177,402
Total allowance and discount on acquired loans	298,620		0.89
Other credit loss reserves:
Reserves for unfunded commitments	3,461		N.A.		1,429		N.A.
Total credit loss reserves	$	302,081	0.90	%	$	158,875	0.83	%

N.A. Not Applicable

Net loan and lease charge-offs for the three and nine months ended September 30, 2019 were $28.6 million, or 0.39% of average loans and leases (annualized), and $61.3 million, or 0.36% of average loans and leases (annualized), respectively, compared with $6.8 million, or 0.15%, and $33.7 million, or 0.24%, for the same periods ended September 30, 2018. The increases from both the three and nine months ended September 30, 2018 was primarily due to an increase in commercial and industrial net charge-offs in the three months ended September 30, 2019 primarily due to one loan relationship.

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Liquidity Management TCF manages its liquidity to ensure that its funding needs are met both promptly and in a cost-effective manner. Asset liquidity arises from liquid assets that can be sold or pledged as collateral, amortization, prepayment or maturity of assets and from the ability of TCF to sell loans. Liability liquidity results from the ability of TCF to maintain a diverse set of funding sources to promptly meet funding requirements.

TCF Bank had $442.6 million of net liquidity qualifying interest-bearing deposits at the Federal Reserve Bank at September 30, 2019, compared with $208.4 million at December 31, 2018. Certain investment securities held-to-maturity and investment securities carried at fair value provide the ability to liquidate or pledge unencumbered securities as needed. At September 30, 2019, securities with a carrying value of $5.7 billion were held, of which $761.4 million was pledged as collateral to secure certain deposits and borrowings.

TCF Financial had net liquidity qualifying cash of $164.4 million at September 30, 2019, compared with $90.4 million at December 31, 2018.

Deposits are the primary source of TCF's funds for use in lending and for other general business purposes. In addition to deposits, TCF receives funds from loan and lease repayments, loan sales and borrowings. Borrowings may be used to compensate for reductions in normal sources of funds, such as deposit inflows at less than projected levels, net deposit outflows or to fund balance sheet growth. TCF primarily borrows from the Federal Home Loan Bank (the "FHLB") of Des Moines. TCF had $3.6 billion of additional borrowing capacity at the FHLB of Des Moines at September 30, 2019, as well as access to the Federal Reserve Discount Window. In addition, TCF maintains a diversified set of unsecured and uncommitted funding sources, including access to overnight federal funds purchased lines, brokered deposits and capital markets. Lending activities, such as loan originations, loan purchases and equipment purchases for lease financing are the primary uses of TCF's funds.

On August 5, 2019, TCF Financial entered into a $50.0 million unsecured revolving credit facility with an unaffiliated bank. The revolving credit facility contains several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on levels of indebtedness. At September 30, 2019, TCF had no outstanding balance under the revolving credit facility and was in compliance with all such covenants. The revolving credit facility is available to be used, as needed, to fund growth, common stock repurchases or other general corporate purposes. TCF was in compliance with all the covenants at September 30, 2019.

TCF Commercial Finance Canada, Inc. ("TCFCFC") maintains a $20.0 million Canadian dollar-denominated line of credit facility with a counterparty, which is guaranteed by TCF Bank. TCFCFC had no (USD) outstanding under the line of credit with the counterparty at September 30, 2019 and at December 31, 2018.

Deposits Deposits were $35.3 billion at September 30, 2019, compared with $18.9 billion at December 31, 2018. The increase in deposits was primarily due to the $16.4 billion deposits acquired in the Merger.

Noninterest bearing checking accounts represented 22.56% of total deposits at September 30, 2019, compared with 20.75% of total deposits at December 31, 2018. TCF's weighted-average interest rate for deposits, including noninterest bearing deposits, was 0.88% the nine months ended September 30, 2019, respectively, compared with 0.54% for the same periods in 2018.

Certificates of deposit were $8.4 billion at September 30, 2019, compared with $4.8 billion at December 31, 2018. The maturities of certificates of deposit with denominations equal to or greater than $100,000 at September 30, 2019 were as follows:

(In thousands)
Three months or less	$	1,683,346
Over three through six months	1,574,030
Over six through 12 months	1,445,375
Over 12 months	392,054
Total	$	5,094,805

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Borrowings Borrowings were $3.5 billion at September 30, 2019, compared with $1.4 billion at December 31, 2018. The increase in borrowings was primarily due to $3.1 billion of borrowings assumed in the Merger, partially offset by subsequent repayments of long-term FHLB advances. In addition, on July 2, 2019, TCF Bank issued $150.0 million of 4.125% fixed-to-floating rate subordinated notes. The subordinated notes quality as Tier 2 capital of TCF Financial Corporation and TCF Bank under the capital adequacy rules established by the Federal Reserve Board and the OCC, respectively, subject to applicable limitations. The proceeds are to be used for general corporate purposes which may include capital to support asset growth and reducing long-term borrowings. On August 5, 2019, TCF Financial entered into a $50.0 million revolving credit facility that was available to be used, as needed, to fund growth, common stock repurchases or other general corporate purposes. Through September 30, 2019, TCF Financial had not drawn on the revolving credit facility.

Information regarding short-term borrowings was as follows:

	At or For the Three Months Ended September 30,						At or For the Nine Months Ended September 30,
(Dollars in thousands)	2019			2018			2019			2018
FHLB advances
Maximum outstanding at any month-end	$	2,440,000		$	—		$	2,440,000		$	—
Balance outstanding at end of period	2,335,960			—			2,335,960			—
Weighted average interest rate at end of period	1.63		%	—		%	1.63		%	—		%
Average balance outstanding	$	1,698,763		$	—		$	773,576		$	—
Weighted average interest rate	1.62		%	—		%	2.07		%	—		%
Federal funds purchased
Maximum outstanding at any month-end	$	—		$	—		$	—		$	—
Balance outstanding at end of period	—			—			—			—
Weighted average interest rate at end of period	—		%	—		%	—		%	—		%
Average balance outstanding	$	283		$	283		$	209		$	209
Weighted average interest rate	2.37		%	2.19		%	2.53		%	1.90		%
Collateralized Deposits
Maximum outstanding at any month-end	$	271,249		$	—		$	271,249		$	—
Balance outstanding at end of period	271,340			—			271,340			—
Weighted average interest rate at end of period	1.00		%	—		%	1.00		%	—		%
Average balance outstanding	$	184,290		$	1,669		$	63,771		$	2,077
Weighted average interest rate	1.01		%	2.24		%	0.55		%	2.07		%
Line-of-credit: TCF Commercial Finance Canada, Inc.
Maximum outstanding at any month-end	$	1,516		$	2,324		$	10,455		$	8,565
Balance outstanding at end of period	—			2,324			—			—
Weighted average interest rate at end of period	—		%	2.75		%	—		%	—		%
Average balance outstanding	$	892		$	1,405		$	1,194		$	1,187
Weighted average interest rate	2.94		%	2.74		%	2.99		%	2.59		%

Long-term borrowings were as follows:

(In thousands)	September 30, 2019		December 31, 2018
FHLB advances	$	322,674	$	1,100,000
Subordinated debt	430,178		253,391
Discounted lease rentals	104,571		92,976
Capital lease obligation	3,059		3,105
Total long-term borrowings	$	860,482	$	1,449,472

See Note 15 Borrowings of Notes to Consolidated Financial Statements for further information regarding TCF's long-term borrowings.

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Contractual Obligations and Commitments As discussed in the Notes to Consolidated Financial Statements, TCF has certain obligations and commitments to make future payments under contracts.

At September 30, 2019, the aggregate contractual obligations and commitments were as follows:

	Payments Due by Period
(In thousands)	Total		Less than 1 year		1-3 years		3-5 years		More than 5 years
Contractual Obligations:
Certificates of deposit	$	8,385,972	$	4,813,249	$	3,404,739	$	137,962	$	30,022
Long-term borrowings	860,482		11,138		179,782		132,681		536,881
Lease obligations	399,825		9,517		59,709		53,990		276,609
Other contractual obligations (1)	129,916		12,256		115,786		1,026		848
Marketing related contracts	246,100		46,793		79,497		63,450		56,360
Construction contracts and land purchase commitments for future branch sites	13,313		13,313		—		—		—
Liabilities related to acquisition and portfolio purchase (2)	8,288		—		4,089		1,024		3,175
Total	$	10,043,896	$	4,906,266	$	3,843,602	$	390,133	$	903,895

(1) Includes commitments to fund qualified low income housing and other tax investment projects, private equity capital investments and other similar types of investments.

(2) Relates to TCF's acquisition of EFLC and a leasing and equipment finance loan and lease portfolio purchase in 2017.

	Amount of Commitment - Expiration by Period
(In thousands)	Total		Less than 1 year		1-3 years		3-5 years		More than 5 years
Commitments:
Commitments to extend credit:
Consumer	$	2,266,913	$	116,212	$	133,673	$	181,397	$	1,835,631
Commercial	5,269,843		2,616,356		1,442,146		894,466		316,875
Total commitments to extend credit	7,536,756		2,732,568		1,575,819		1,075,863		2,152,506
Standby letters of credit and guarantees on industrial revenue bonds	125,438		70,662		26,574		19,356		8,846
Total	$	7,662,194	$	2,803,230	$	1,602,393	$	1,095,219	$	2,161,352

Unrecognized tax benefits, projected benefit obligations, demand deposits with indeterminate maturities and discretionary credit facilities that do not obligate us to lend have been excluded from the contractual obligations table above.

Capital Management TCF is committed to managing capital to maintain protection for shareholders, depositors and creditors. TCF employs a variety of capital management tools to achieve its capital goals, including, but not limited to, dividends, public offerings of preferred and common stock, common stock repurchases, redemption of preferred stock and the issuance or redemption of subordinated debt and other capital instruments. TCF maintains a Capital Planning and Dividend Policy which applies to TCF Financial and incorporates TCF Bank's Capital Planning and Dividend Policy. These policies ensure that capital strategy actions, including the addition of new capital, if needed, common stock repurchases, redemption of preferred stock or the declaration of preferred stock, common stock and bank dividends are prudent, efficient and provide value to TCF's shareholders, while ensuring that past and prospective earnings retention is consistent with TCF's capital needs for growth, as well as asset quality and overall financial condition. TCF and TCF Bank manage their capital levels to exceed all regulatory capital requirements.

On October 24, 2019, our board of directors approved an authorization to repurchase up to $150 million of our common stock. The repurchase program has no expiration, and permits shares to be repurchased in compliance with Rule 10b-18 of the Exchange Act, through one or more broker-dealers as part of “block purchases” made by TCF, and/or through privately negotiated purchases, accelerated stock repurchase agreements, or Rule 10b5-1 plans at the discretion of the Corporation. Through November 11, 2019, we repurchased 190,977 shares of of our common stock totaling $8.0 million.

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At September 30, 2019 and December 31, 2018, TCF Bank's capital ratios exceeded the quantitative capital ratios required for an institution to be considered "well-capitalized." Significant factors that may affect capital adequacy include, but are not limited to, a disproportionate growth in assets versus capital and a change in mix or credit quality of assets. There are no conditions or events since September 30, 2019 that management believes have changed TCF Bank's status as well-capitalized.

Equity Total equity was $5.7 billion, or 12.5% of total assets, at September 30, 2019, compared with $2.6 billion, or 10.8% of total assets, at December 31, 2018. The increase in equity during the nine months ended September 30, 2019 was primarily attributable to the 81.9 million shares of common stock issued in the Merger. See Note 2 Merger of Notes to Consolidated Financial Statements for further information.

Treasury Stock and Other Treasury stock and other was $27.4 million at September 30, 2019, compared with $252.2 million at December 31, 2018. The $27.4 million at September 30, 2019 was comprised of shares held in trust for deferred compensation plans. The decrease was primarily due to the elimination of all previously outstanding Legacy TCF treasury stock in connection with the close of the Merger.

Common Stock Dividends Dividends to common shareholders on a per share basis were 35 cents for the three months ended September 30, 2019, and as adjusted to reflect the Merger Exchange Ratio, 94 cents for the nine months ended September 30, 2019. Dividends to common shareholders on a per share basis, adjusted to reflect the Merger Exchange Ratio, were 29.5 cents for the three months ended September 30, 2018 and 88.5 cents for the nine months ended September 30, 2018. TCF Financial's common stock dividend payout ratio was 233.3% and 52.5% for the three and nine months ended September 30, 2019, compared with 29.4% and 36.6% for the same periods in 2018. TCF Financial's primary funding sources for dividends are dividends received from TCF Bank.

On October 24, 2019, our board of directors declared a regular quarterly cash dividend of $0.35 per common share payable on December 2, 2019 to shareholders of record at the close of business on November 15, 2019, and declared a quarterly cash dividend of $0.35625 per depositary share payable on December 2, 2019 to shareholders of record of the depositary shares, each representing a 1/1,000th interest in a share of the 5.70% Series C Non-Cumulative Perpetual Preferred Stock, at the close of business on November 15, 2019.

Common Shareholders' Equity Total common shareholders' equity was $5.5 billion, or 12.04% of total assets, at September 30, 2019, compared with $2.4 billion, or 9.99%, at December 31, 2018. Tangible common equity was $4.0 billion, or 9.09% of total tangible assets, at September 30, 2019, compared with $2.2 billion, or 9.32%, at December 31, 2018. Book value per common share was $35.82 at September 30, 2019, compared with $26.85 at December 31, 2018. Tangible book value per common share was $26.18 at September 30, 2019, compared with $24.87 at December 31, 2018. See "Consolidated Financial Condition Analysis — Non-GAAP Financial Measures" in this Management's Discussion and Analysis for further information.

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Non-GAAP Financial Measures

This report contains references to financial measures that are not defined in GAAP. Such non-GAAP financial measures include our tangible book value per common share; tangible common shareholders' equity; presentation of net interest income and net interest margin on a fully tax-equivalent ("FTE") basis; our adjusted efficiency ratio (which excludes merger-related expenses, loss on transfer of legacy TCF auto loans to held-for-sale, termination of interest rate swaps, write-down of company-owned vacant land parcels, gains from sale of certain investment securities, loan servicing rights impairment, CFPB/OCC settlement adjustment, lease financing equipment depreciation, net interest income FTE adjustment and amortization of intangible assets); and other adjusted information presented excluding merger-related expenses and non-core items (defined as loss on transfer of legacy TCF auto loans to held-for-sale, termination of interest rate swaps, write-down of company-owned vacant land parcels, gains from sale of certain investment securities, loan servicing rights impairment and CFPB/OCC settlement adjustment) including net income, diluted earnings per share, return on average assets, return on average common shareholders' equity, return on average tangible common shareholders' equity tangible book value per common share and tangible common equity to tangible assets. Management believes that the presentation of these non-GAAP financial measures (i) provides important supplemental information that contributes to a proper understanding of our operating performance, (ii) enables a more complete understanding of factors and trends affecting our business and (iii) allows investors to evaluate our performance in a manner similar to management, the financial services industry, bank stock analysts, and bank regulators. Management uses non-GAAP financial measures internally in the preparation of our operating budgets, monthly financial performance reporting, and in our presentation to investors of our performance. Non-GAAP financial measures are not defined by GAAP and other entities may calculate them differently than TCF does. Non-GAAP financial measures have inherent limitations and are not required to be uniformly applied. Although non-GAAP financial measures are frequently used by stakeholders in the evaluation of a company, they have limitations as analytical tools and should not be considered in isolation or as a substitute for analyses of results as reported under GAAP.

The following tables provide a reconciliation of each non-GAAP financial measure to the most directly comparable GAAP financial measure. A reconciliation of net interest income and net interest margin (FTE) to the most directly comparable GAAP financial measure can be found within the Net Interest Income subheading of this report.

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The computation of the adjusted diluted earnings per common share was as follows:

		Three Months Ended September 30,					Nine Months Ended September 30,
(Dollars in thousands, except per share data)		2019			2018		2019			2018
Net income available to common shareholders		$	19,654		$	83,702	$	175,588		$	206,131
Less: Earnings allocated to participating securities		—			13		19			30
Earnings allocated to common shareholders	(a)	19,654			83,689		175,569			206,101
Plus: Merger-related expenses		111,259			—		124,943			—
Non-core items:
Plus: Loss on transfer of legacy TCF auto finance portfolio to held-for-sale(1)		19,264			—		19,264			—
Plus: Termination of interest rate swaps(2)		17,302			—		17,302			—
Less: Gain on sale of certain investment securities(3)		(5,869		)	—		(5,869		)	—
Plus: Write-down of company-owned vacant land parcels(4)		5,890			—		5,890			—
Plus: Loan servicing rights impairment(2)		4,520			—		4,520			—
Plus: CFPB/OCC settlement adjustment(4)		—			—		—			32,000
Total non-core items		41,107			—		41,107			32,000
Less: Related income tax expense, net of benefits(5)		46,213			—		49,481			6,491
Total adjustments, net of tax		106,153			—		116,569			25,509
Adjusted earnings allocated to common stock	(b)	$	125,807		$	83,689	$	292,138		$	231,610
Weighted-average common shares outstanding used in diluted earnings per common share calculation(6)	(c)	128,754,588			83,808,063		98,055,279			84,791,124
Diluted earnings per common share	(a) / (c)	$	0.15		$	1.00	$	1.79		$	2.43
Adjusted diluted earnings per common share	(b) / (c)	0.98			1.00		2.98			2.73
Net income attributable to TCF		$	22,148		$	86,196	$	183,069		$	218,706
Total adjustments, net of tax		106,153			—		116,569			25,509
Adjusted net income attributable to TCF		$	128,301		$	86,196	$	299,638		$	244,215

⁽¹⁾  Included within Net (losses) gains on sales of loans and leases

⁽²⁾  Included within Other noninterest income.

⁽³⁾  Included within Net gains (losses) on investment securities.

⁽⁴⁾  Included within Other noninterest expense.

⁽⁵⁾  Included within Income tax (benefit) expense.

⁽⁶⁾  Assumes conversion of common shares, as applicable.

The computation of the adjusted net interest income and margin was as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
(Dollars in thousands, except per share data)	2019			2018			2019			2018
Net Interest Income	$	371,793		$	253,502		$	880,279		$	755,342
Purchase accounting accretion and amortization	28,411			—			28,411			—
Net interest income, excluding purchase accounting accretion and amortization	$	343,382		$	253,502		$	851,868		$	755,342
Net interest margin (FTE)	4.14		%	4.73		%	4.36		%	4.70		%
Purchase accounting accretion and amortization	0.31			—			0.14			—
Net interest margin, excluding purchase accounting accretion and amortization (FTE)	3.83		%	4.73		%	4.22		%	4.70		%

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The computation of the adjusted return on average assets, common equity, average tangible common equity and average tangible common equity was as follows:

		Three Months Ended September 30,						Nine Months Ended September 30,
(Dollars in thousands)		2019			2018			2019			2018
Adjusted net income after tax expense:
Income after tax expense	(a)	$	24,978		$	88,839		$	192,470		$	227,472
Plus: Merger-related expenses		111,259			—			124,943			—
Plus: Non-core items		41,107			—			41,107			32,000
Less: Related income tax expense, net of tax benefits		46,213			—			49,481			25,509
Adjusted net income after tax expense for ROAA calculation	(b)	$	131,131		$	88,839		$	309,039		$	233,963
Net income available to common shareholders	(c)	$	19,654		$	83,702		$	175,588		$	206,131
Plus: Other intangibles amortization		4,544			911			6,154			2,572
Less: Related income tax expense		1,085			220			1,470			620
Net income available to common shareholders used in ROATCE calculation	(d)	$	23,113		$	84,393		$	180,272		$	208,083
Adjusted net income available to common shareholders:
Net income available to common shareholders		$	19,654		$	83,702		$	175,588		$	206,131
Plus: Non-core items		41,107			—			41,107			32,000
Plus: Merger-related expenses		111,259			—			124,943			—
Less: Related income tax expense, net of tax benefits		46,213			—			49,481			25,509
Net income available to common shareholders used in adjusted ROACE calculation	(e)	125,807			83,702			292,157			212,622
Plus: Other intangibles amortization		4,544			911			6,154			2,572
Less: Related income tax expense		1,085			220			1,470			620
Net income available to common shareholders used in adjusted ROATCE calculation	(f)	$	129,266		$	84,393		$	296,841		$	214,574
Average balances:
Average assets	(g)	$	39,094,366		$	22,904,404		$	29,283,275		$	23,031,108
Total average equity		$	4,683,129		$	2,511,983		$	3,316,504		$	2,534,758
Less: Non-controlling interest in subsidiaries		25,516			23,548			26,558			25,133
Total TCF Financial Corporation shareholders' equity		4,657,613			2,488,435			3,289,946			2,509,625
Less: Preferred stock		169,302			169,302			169,302			169,302
Average total common shareholders' equity used in ROACE calculation	(h)	$	4,488,311		$	2,319,133		$	3,120,644		$	2,340,323
Less: Average goodwill, net		890,155			154,757			402,583			154,757
Less: Average other intangibles, net		142,925			21,772			61,208			22,549
Average tangible common shareholders' equity used in ROATCE calculation	(i)	$	3,455,231		$	2,142,604		$	2,656,853		$	2,163,017
ROAA(1)	(a) / (g)	0.26		%	1.55		%	0.88		%	1.32		%
Adjusted ROAA(1)	(b) / (g)	1.34			1.55			1.41			1.46
ROACE(1)	(c) / (h)	1.75			14.44			7.50			11.80
Adjusted ROACE(1)	(e) / (h)	11.21			14.44			12.48			13.26
ROATCE(1)	(d) / (i)	2.68			15.76			9.05			12.89
Adjusted ROATCE(1)	(f) / (i)	14.96			15.76			14.90			14.47

⁽¹⁾  Annualized.

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The computation of the adjusted efficiency ratio was as follows:

		Three Months Ended September 30,						Nine Months Ended September 30,
(Dollars in thousands)		2019			2018			2019			2018
Noninterest expense	(a)	$	425,620		$	246,423		$	915,544		$	764,442
Less: Merger-related expenses		111,259			—			124,943			—
Less: CFPB/OCC settlement adjustment		—			—			—			32,000
Less: Write-down of company-owned vacant land parcels		5,890			—			5,890			—
Adjusted noninterest expense		$	308,471		$	246,423		$	784,711		$	732,442
Less: Lease financing equipment depreciation		19,408			19,525			57,797			54,744
Less: Other intangibles amortization		4,544			911			6,154			2,572
Adjusted noninterest expense, efficiency ratio	(b)	$	284,519		$	225,987		$	720,760		$	675,126
Net interest income		$	371,793		$	253,502		$	880,279		$	755,342
Noninterest income		94,258			112,064			307,480			330,529
Total revenue	(c)	$	466,051		$	365,566		$	1,187,759		$	1,085,871
Noninterest income		$	94,258		$	112,064		$	307,480		$	330,529
Plus: Loss on transfer of legacy TCF auto loans to held-for-sale		19,264			—			19,264			—
Plus: Termination of interest rate swaps		17,302			—			17,302			—
Less: Gain on sales of certain investment securities		(5,869		)	—			(5,869		)	—
Plus: Loan servicing rights impairment		4,520			—			4,520			—
Adjusted noninterest income		129,475			112,064			342,697			330,529
Net interest income		371,793			253,502			880,279			755,342
Plus: Net interest income FTE adjustment		2,488			2,112			5,547			6,269
Adjusted net interest income		374,281			255,614			885,826			761,611
Less: Lease financing equipment depreciation		19,408			19,525			57,797			54,744
Adjusted total revenue, efficiency ratio	(d)	$	484,348		$	348,153		$	1,170,726		$	1,037,396
Efficiency ratio	(a) / (c)	91.32		%	67.41		%	77.08		%	70.40		%
Adjusted efficiency ratio	(b) / (d)	58.74			64.91			61.57			65.08

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The computations of tangible common equity to tangible assets and tangible book value per common share were as follows:

(Dollars in thousands, except per share data)		At September 30, 2019			At December 31, 2018
Total equity		$	5,693,417		$	2,556,260
Less: Non-controlling interest in subsidiaries		23,313			18,459
Total TCF Financial Corporation shareholders' equity		5,670,104			2,537,801
Less: Preferred share		169,302			169,302
Total common shareholders' equity	(a)	5,500,802			2,368,499
Less: Goodwill		1,265,111			154,757
Less: Other intangibles, net		215,910			20,496
Tangible common shareholders' equity	(b)	$	4,019,781		$	2,193,246
Total assets	(c)	$	45,692,511		$	23,699,612
Less: Goodwill		1,265,111			154,757
Less: Other intangibles, net		215,910			20,496
Tangible assets	(d)	$	44,211,490		$	23,524,359
Common stock shares outstanding	(e)	153,571,381			88,198,460
Common equity to assets	(a) / (c)	12.04		%	9.99		%
Tangible common equity to tangible assets	(b) / (d)	9.09			9.32
Book value per common share	(a) / (e)	$	35.82		$	26.85
Tangible book value per common share	(b) / (e)	26.18			24.87

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

TCF's results of operations depend, to a large degree, on its net interest income and its ability to manage interest rate risk. Although TCF manages other risks in the normal course of business, such as credit risk, liquidity risk and foreign currency risk, the Corporation considers interest rate risk to be one of its more significant market risks.

Interest Rate Risk

TCF's ALCO and the Finance Committee of TCF Financial Corporation's Board of Directors have established interest rate risk policy limits. Interest rate risk is defined as the exposure of net interest income and fair value of financial instruments (interest earning assets, deposits and borrowings) to movements in interest rates. The major sources of the Corporation's interest rate risk are timing differences in the maturity and repricing characteristics of assets and liabilities, changes in the shape of the yield curve, changes in consumer behavior and changes in relationships between rate indices (basis risk). Management measures these risks and their impact in various ways, including through the use of simulation and valuation analyses. The interest rate scenarios may include gradual or rapid changes in interest rates, spread narrowing and widening, yield curve twists and changes in assumptions about consumer behavior in various interest rate scenarios. A mismatch between maturities, interest rate sensitivities and prepayment characteristics of assets and liabilities results in interest rate risk. TCF, like most financial institutions, has material interest rate risk exposure to changes in both short- and long-term interest rates, as well as variable interest rate indices (e.g., the prime rate or London Interbank Offered Rate).

TCF's ALCO is responsible for reviewing the Corporation's interest rate sensitivity position and establishing policies to monitor and limit exposure to interest rate risk. ALCO manages TCF's interest rate risk based on interest rate expectations and other factors. The principal objective of TCF in managing its assets and liabilities is to provide maximum levels of net interest income and facilitate the funding needs of the Corporation, while maintaining acceptable levels of interest rate risk and liquidity risk.

ALCO primarily uses two interest rate risk tools with policy limits to evaluate TCF's interest rate risk: net interest income simulation and economic value of equity ("EVE") analysis.

Management utilizes net interest income simulation models to estimate the near-term effects of changing interest rates on its net interest income. Net interest income simulation involves forecasting net interest income under a variety of scenarios, including the level of interest rates, the shape of the yield curve and the spreads between market interest rates. Management exercises its best judgment in making assumptions regarding events that management can influence, such as non-contractual deposit repricings and events outside management's control, including consumer behavior on loan and deposit activity and the effect that competition has on both loan and deposit pricing. These assumptions are subjective and, as a result, net interest income simulation results will differ from actual results due to the timing, magnitude and frequency of interest rate changes and changes in market conditions, consumer behavior and management strategies, among other factors. TCF performs various sensitivity analyses on new loan spreads, prepayment rates, basis risk and deposit assumptions.

The following table presents changes in TCF's net interest income over a twelve month period if short- and long-term interest rates were to sustain an immediate change. These projections were based on our assets and liabilities remaining static over the next twelve months and factored into the simulation model.

	Impact on Net Interest Income
(Dollars in millions)	September 30, 2019
Immediate change in interest rates:
+200 basis points	$	59,400		3.9	%
+100 basis points	35,500			2.3
-100 basis points	(74,700		)	(4.9	)

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Management also uses EVE to measure risk in the balance sheet that might not be taken into account in the net interest income simulation analysis. Net interest income simulation highlights exposure over a relatively short time period, while EVE analysis incorporates all cash flows over the estimated remaining life of all balance sheet positions. The valuation of the balance sheet, at a point in time, is defined as the discounted present value of asset cash flows minus the discounted present value of liability cash flows. EVE analysis addresses only the current balance sheet and does not incorporate the planned changes to interest-earning assets. As with the net interest income simulation model, EVE analysis is based on key assumptions about the timing and variability of balance sheet cash flows and does not take into account any potential responses by management to anticipated changes in interest rates.

Item 4. Controls and Procedures.

Disclosure Controls and Procedures TCF carried out an evaluation, under the supervision and with the participation of TCF's management, including TCF's Chief Executive Officer (Principal Executive Officer), Chief Financial Officer (Principal Financial Officer) and Chief Accounting Officer (Principal Accounting Officer), of the effectiveness of the design and operation of TCF’s disclosure controls and procedures pursuant to Rules 13a-15 and 15d-15 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Based on that evaluation, TCF’s Principal Executive Officer and Principal Financial Officer concluded that TCF's disclosure controls and procedures were effective as of September 30, 2019.

Any system of disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. The design of a control system inherently has limitations and the benefits of controls must be weighed against their costs. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls. Therefore, no assessment of a cost-effective system of internal controls can provide absolute assurance that all control issues and instances of fraud, if any, will be detected.

Disclosure controls and procedures are designed to ensure that information required to be disclosed by TCF in reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. Disclosure controls are also designed with the objective of ensuring that such information is accumulated and communicated to TCF's management, including the Chief Executive Officer (Principal Executive Officer), Chief Financial Officer (Principal Financial Officer) and Chief Accounting Officer (Principal Accounting Officer), as appropriate, to allow for timely decisions regarding required disclosure. TCF's disclosure controls also include internal controls that are designed to provide reasonable assurance that transactions are properly authorized, assets are safeguarded against unauthorized or improper use and that transactions are properly recorded and reported.

Changes in Internal Control Over Financial Reporting Management is responsible for establishing and maintaining adequate internal control over financial reporting for TCF. Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Internal control over financial reporting includes those policies and procedures that pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of the assets of TCF; provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles and that receipts and expenditures of TCF are only being made in accordance with authorizations of management and directors of TCF; and provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of TCF’s assets that could have a material effect on the financial statements.

The Merger, which was completed on August 1, 2019, had a material impact on the financial position, results of operations and cash flows of the combined company from the date of acquisition through September 30, 2019. The Merger also resulted in significant changes to the combined company's internal controls over financial reporting. We are in the process of assessing, as well as planning for the integration of, internal controls over financial reporting for the combined company and will report on our assessment of our internal controls over financial reporting in our next annual report.

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Part II - Other Information                                                

Item 1. Legal Proceedings.

From time to time, TCF is a party to legal proceedings arising out of its lending, leasing and deposit operations, including foreclosure proceedings and other collection actions as part of its lending and leasing collections activities. TCF may also be subject to regulatory examinations and enforcement actions brought by federal regulators, including the Securities and Exchange Commission, the Federal Reserve, the Office of the Comptroller of the Currency and the Consumer Financial Protection Bureau which may impose sanctions on TCF for failures related to regulatory compliance. From time to time borrowers and other customers, and employees and former employees have also brought actions against TCF, in some cases claiming substantial damages. TCF and other financial services companies are subject to the risk of class action litigation. Litigation is often unpredictable and the actual results of litigation cannot be determined and therefore the ultimate resolution of a matter and the possible range of loss associated with certain potential outcomes cannot be established. Based on our current understanding of TCF's pending legal proceedings, management does not believe that judgments or settlements arising from pending or threatened legal matters, individually or in the aggregate, would have a material adverse effect on the consolidated financial position, operating results or cash flows of TCF.

Item 1A. Risk Factors.

There were no material changes in the risk factors for TCF in the quarter covered by this report. You should carefully consider the risks and risk factors included under Part 1, Item 1A. in each of TCF’s and Legacy TCF’s Annual Reports on Form 10-K for the year ended December 31, 2018, and in TCF’s other SEC filings, including the Joint Proxy Statement/Prospectus regarding the Merger that TCF filed with the SEC on May 3, 2019 pursuant to Rule 424(b)(3). TCF's business, financial condition or results of operations could be materially adversely affected by any of these risks.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

Share repurchase activity for the quarter ended September 30, 2019 was as follows:

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plan
July 1 to July 31, 2019
Share repurchase program(1)	780,716	$	41.39	780,716
Employee transactions(2)	2,153	41.33		N.A.
August 1 to August 31, 2019
Employee transactions(2)	6,899	38.14		N.A.
September 1 to September 30, 2019
Employee transactions(2)	2,777	37.44		N.A.
Total
Share repurchase program(1)	780,716	$	41.39	780,716
Employee transactions(2)	11,829	38.55		N.A.

 N.A. Not Applicable

(1) On July 25, 2018, the Legacy TCF Board of Directors approved a $150.0 million increase to Legacy TCF's common stock repurchase program, with repurchases to be based on market conditions, the trading price of TCF shares and other factors. This repurchase authorization was terminated in connection with the completion of the Merger effective August 1, 2019. The total number of shares purchased and the average price paid have been retrospectively adjusted to reflect the equivalent number of shares issued in the Merger.

(2) Represents restricted stock withheld pursuant to the terms of awards granted under either the Legacy TCF Financial Incentive Stock Program or the Legacy TCF Omnibus Incentive Plan to offset tax withholding obligations that occur upon vesting and release of restricted stock. Both plans provide that the value of shares withheld shall be the average of the high and low prices of common stock of Legacy TCF on the date the relevant transaction occurs. With respect to employee transactions from July 1 to July 31, 2019, the total number of shares purchased and the average price paid have been retrospectively adjusted to reflect the equivalent number of shares issued in the Merger.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

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Item 5. Other Information.

The following information is being filed herewith in lieu of filing such information on a Current Report on Form 8-K under Item 5.02, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers:

Amendment and Restatement of Employment Agreement with Craig R. Dahl

On November 6, 2019, TCF made and entered into an amended and restated employment agreement (the “Employment Agreement”) with Craig R. Dahl in order to align certain terms of Mr. Dahl’s employment with those of other executive officers of the Corporation.

The Employment Agreement changed certain terms of Mr. Dahl’s employment that were contained in that certain Amended and Restated Employment Agreement (the “Merger Employment Agreement”), dated January 27, 2019, which became effective on August 1, 2019. Below is a summary of the materially changed terms of Mr. Dahl’s employment following execution of the Employment Agreement:

• The cash payment called for in the event of a termination by the Corporation without Cause, or by Mr. Dahl with Good Reason was changed from 2.5 times the sum of (i) his Annual Base Salary and (ii) his annual bonus (which was set as to equal 100% of his salary) to 2.5 times the sum of (i) Mr. Dahl’s Annual Base Salary and (ii) the average of Mr. Dahl’s annual bonus for the three most recently completed fiscal years;

• in the event of a termination by the Corporation without Cause, by Mr. Dahl for Good Reason, or upon death, disability or retirement on one year's notice, all of Mr. Dahl’s outstanding equity awards will vest; and

• The definition of Change in Control was changed by increasing the percentage of securities of the Corporation that any person would have to become the beneficial owner of in order to qualify as a Change in Control from 30% to 40% and the definition was expanded to include an “Active Change in Control Proposal Period” as defined in the Employment Agreement;

Other than as described above, the material terms of Mr. Dahl’s employment contained in the Merger Employment Agreement remain unchanged, and the description of them contained in the Corporation’s Current Report on Form 8-K filed on January 28, 2019 is incorporated herein by reference.

The foregoing description of the Employment Agreement is qualified in all respects by reference to the full text of the Employment Agreement, a copy of which is attached as Exhibit 10(a) to this Quarterly Report on Form 10-Q.

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Item 6. Exhibits.

 

Exhibit Number	Description
2(a)	Agreement and Plan of Merger between Chemical Financial Corporation and TCF Financial Corporation dated as of January 27, 2019 [incorporated by reference to Exhibit 2.1 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on January 28, 2019 (No. 19545732)]
3(a)	Restated Articles of Incorporation of TCF Financial Corporation [incorporated by reference to Exhibit 3.1 to our Form 10-Q for the quarter ended March 31, 2017 (No. 17829102)]
3(b)	Amendment to the Restated Articles of Incorporation of TCF Financial Corporation, including the Certificate of Designations of 5.70% Series C Non-Cumulative Perpetual Preferred Stock [incorporated by reference to Exhibit 3.2 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on August 1, 2019 (No. 19993087)]
3(c)	Bylaws of TCF Financial Corporation, as of August 1, 2019 [incorporated by reference to Exhibit 3.3 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on August 1, 2019 (No. 19993087)]
4(a)	Description of Capital Stock [incorporated by reference to Exhibit 4.1 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on August 1, 2019 (No. 19993087)]
10(a)#*	Amended and Restated Employment Agreement between Craig R. Dahl and TCF Financial Corporation, dated as of November 6, 2019
10(b)*	Letter Agreement dated July 31, 2019 between Chemical Financial Corporation and Brennan Ryan [incorporated by reference to Exhibit 10.2 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on August 1, 2019 (No. 19993087)]
10(c)*	Amended and Restated Employment Agreement dated July 31, 2019 between Chemical Financial Corporation and Thomas C. Shafer [incorporated by reference to Exhibit 10.23 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on August 1, 2019 (No. 19993087)]
10(d)*	Form of Retention Time-Vesting Restricted Stock Unit Agreement [incorporated by reference to Exhibit 10.4 of TCF Financial Corporation’s Current Report on Form 8-K filed with the SEC on August 1, 2019 (No. 19993087)]
31.1#	Certification of the Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2#	Certification of the Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1#	Certification of the Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2#	Certification of the Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH#	XBRL Taxonomy Extension Schema Document
101.CAL#	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF#	XBRL Taxonomy Extension Definitions Linkbase Document
101.LAB#	XBRL Taxonomy Extension Label Linkbase Document
101.PRE#	XBRL Taxonomy Extension Presentation Linkbase Document

* Executive Contract

#  Filed herein

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

TCF FINANCIAL CORPORATION

/s/ Craig R. Dahl

Craig R. Dahl,

Chief Executive Officer and President

(Principal Executive Officer)

/s/ Dennis L. Klaeser

Dennis L. Klaeser,

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

/s/ Kathleen S. Wendt

Kathleen S. Wendt,

Executive Vice President and Chief Accounting Officer

(Principal Accounting Officer)

Dated: November 12, 2019

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EX-10.1

EXHIBIT 10(a)

AMENDED AND RESTATED EMPLOYMENT AGREEMENT

THIS AMENDED AND RESTATED AGREEMENT (this “Agreement”) is made and entered into effective as of November 6, 2019 (the “Effective Date”) between TCF FINANCIAL CORPORATION, a Michigan corporation (“Company”) and CRAIG R. DAHL (“Executive”).

RECITALS:

WHEREAS, the Company is a bank holding company and Executive is the Chief Executive Officer of the Company; and

WHEREAS, Executive and TCF Financial Corporation, a Delaware corporation (“Legacy TCF”) previously entered into the Employment Agreement (the “Merger Employment Agreement”) effective as of August 1, 2019 (the “Effective Time”) pursuant to the Agreement and Plan of Merger, dated as of January 27, 2019 by and between Legacy TCF and the Company (the “Merger Agreement”), which was assumed by the Company as of the Effective Time; and

WHEREAS, Executive and the Company wish to amend and restate the Merger Employment Agreement in order to harmonize certain terms with other similar employment agreements of the Company;

NOW, THEREFORE, in consideration of the mutual promises and agreements set forth herein, the parties agree as follows:

1.Employment and Duties. For the period described in paragraph 2 below, Executive shall be employed as the Chief Executive Officer of the Company with overall responsibility for the business and affairs of the Company and Executive’s powers and authority shall be superior to those of any other officer or employee of the Company or its subsidiaries. In discharging such duties and responsibilities, Executive may also serve as an executive officer and/or director of any direct or indirect subsidiary of the Company (collectively, the “TCF Subsidiaries”). Executive shall report directly to the Company’s Board of Directors (the “Board”). During the term of his employment as Chief Executive Officer under this Agreement, Executive shall apply on a full-time basis (allowing for usual vacations and sick leave) all of his skill and experience to the performance of his duties in his positions with the Company and the TCF Subsidiaries. It is understood that Executive may have other business investments and participate in other business, charitable, non-profit, or civic ventures which shall not interfere or be inconsistent with his duties under this Agreement. Executive shall perform his duties at any of the Company’s executive offices as determined by Executive; provided that Executive shall travel to other locations at such times as may be necessary for the performance of his duties under this Agreement.

2.Term of Employment. Unless sooner terminated as hereinafter provided, the term of this Agreement shall continue through the third anniversary of the Effective Date; provided, however, that in the event a Change in Control shall have occurred during the term of this Agreement, this Agreement shall expire on the later of the third anniversary of the Effective Date or the day which is twenty-four months following the date on which such Change in Control occurred. This Agreement may be extended by the mutual agreement in writing of the parties.

3.Compensation and Benefits. During the term of this Agreement, Executive shall be entitled to the following compensation and benefits:

(i)Base Salary, Bonus. Executive shall receive:

(i)An annual base salary (the “Annual Base Salary”) of at least One Million and Fifty Thousand and No/100 Dollars ($1,050,000.00), which shall be reviewed for increase from time to time by the Board (and no less often than annually) beginning in 2020 and may be increased (but not decreased) in the sole discretion of the Compensation Committee (as defined below). The term “Annual Base Salary” as used in this Agreement shall refer to the Annual Base Salary as it may be so adjusted from time to time; and

(ii)Executive shall be eligible to participate in the Company’s annual bonus program for senior executives, based on Executive’s and the Company’s (or its affiliate’s) achievement of certain individual and corporate goals established by the Board or the Compensation and Pension Committee of the Board (the “Compensation Committee”); provided, however, that for each fiscal year during the term of this Agreement, Executive’s target annual bonus opportunity will be no less than one hundred percent (100%) of Annual Base Salary.

(iii)Executive shall not receive director’s fees paid to non-employee directors or an annual fee for serving as Chairman of the Board or as a director during the period of this Agreement.

(ii)Stock Incentives. Executive shall be eligible to receive such awards under any of the Company’s stock incentive based plans as may be determined by the Compensation Committee from time to time. Notwithstanding the foregoing, for each fiscal year during the term of this Agreement, Executive shall be granted equity-based awards having an aggregate grant date fair value at target level equal to two hundred percent (200%) of Annual Base Salary, on a basis, including the proportion of time- and performance-vesting awards, and terms and conditions no less favorable than applies to the other senior executives of the Company. Notwithstanding the foregoing, the annual equity awards will provide for vesting on a termination of employment for any reason, other than termination by the Company for Cause or by Executive voluntarily without Good Reason (except as later provided in the case of Death, Retirement, or Disability).

(iii)Reimbursement of Expenses. The Company shall reimburse Executive for all business expenses properly documented, including without limitation, Executive’s reasonable legal fees incurred in the preparation of this Agreement. Any such payments shall be made no later than 2¹/₂ months after the end of the calendar year in which the expense was incurred.

(iv)Aircraft. During the term of this Agreement, and provided that the Company continues to own or leases an aircraft, Executive shall be entitled to reasonable use of the Company’s corporate aircraft, provided that Executive shall be responsible for all individual income taxes resulting from his use of the aircraft for non-business travel, and such usage shall be reviewed annually by the Compensation Committee.

(v)Other Benefits. Executive shall be entitled to participate in and shall be included in any employee benefit plan, pension plan, supplemental employee retirement plan, fringe benefit

2

programs or similar plan of the Company now existing or established hereafter to the extent that he is eligible under the general provisions thereof.

(vi)Perquisites. Executive shall be entitled to other perquisites provided to executive officers, subject to annual review by the Compensation Committee. Payment of perquisites, if any, shall be made no later than 2¹/₂ months after the end of the calendar year in which Executive was entitled to such payments.

(vii)Clawback. Notwithstanding anything in this Agreement to the contrary, in the event of a restatement of financial results by the Company, the Audit Committee of the Board shall determine (after reasonable notice to Executive and an opportunity for Executive, together with his legal counsel, to be heard before the Audit Committee) whether or not repayment of any compensation is required under Section 304 of the Sarbanes-Oxley Act. If the Audit Committee determines that such repayment is required, the Audit Committee shall make a demand for repayment by Executive of any bonus or other incentive-based or equity-based compensation, and any profits realized from the sale of TCF stock or other TCF securities, which are required to be returned to the Company as a result of Section 304 of the Sarbanes-Oxley Act. Executive shall promptly tender such repayment unless he disputes the findings of the Audit Committee. In addition to the foregoing, all compensation received by Executive pursuant to this Agreement or pursuant to awards made under the Company’s stock incentive plans will also be subject to, and Executive shall comply with, any “clawback” policy adopted by the Board of the Company or any committee thereof that is applicable to officers of the Company in response to or in anticipation of the listing standards to be established by national securities exchanges and associations in accordance with Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act.

4.Termination of Employment.

(a)Termination without Cause. The Company may terminate Executive’s employment without Cause at any time and for any lawful reason upon thirty (30) days advance written notice to Executive.

(i)Cash Payments. In the event Executive’s employment with the Company is terminated by the Company without Cause during the term of this Agreement, Executive shall be entitled to a lump sum amount equal to two and one-half (2.5) times Annual Base Salary (as set forth in paragraph 3) plus two and one-half (2.5) times the average of Executive’s bonuses under the Company’s annual executive incentive plan for each of the three (3) most recent complete calendar years of Executive’s employment with the Company (or the lesser number of complete calendar years that Executive has been employed by the Company) payable within thirty (30) days after the date of termination.

(ii)Additional Payments. In addition, in the event of a termination of the Executive’s employment by the Company without Cause whether before, upon or after a Change in Control and such termination occurs after the end of the Company’s fiscal year but prior to the payment of any annual bonus payable to Executive under the bonus program applicable to such fiscal year, the Company shall pay Executive the annual bonus earned by Executive under such bonus program when bonuses are paid to other recipients under such bonus program, but not later than 2¹/₂ months after the end of the calendar year in which the termination occurs. If Executive timely elects to continue Executive’s group health and dental insurance coverage pursuant to applicable COBRA/continuation law and the terms of the respective benefit plans, the Company shall pay, on Executive’s behalf, the monthly premiums

3

for such coverage for the lesser of twenty four (24) months or such time as Executive’s COBRA/continuation rights expire.

(iii)Equity Treatment. Notwithstanding the terms in any award agreement, all equity-based awards granted to Executive shall be treated as follows: (i) all unvested stock options immediately shall vest, become exercisable and together with Executive’s other vested, unexercised stock options, remain exercisable until the expiration of their full original term; (ii) all outstanding time-based restricted stock units and restricted stock automatically shall vest and be convertible into the Company’s common stock, with settlement to occur within seven (7) days thereafter (or such later date as may be required to comply with Code Section 409A); (iii) all performance-based stock units shall vest at the greater of one hundred percent (100%) of the applicable target level and actual performance determined based on the results through the last completed calendar quarter prior to the termination date and shall be convertible into the Company’s common stock, with settlement to occur within seven (7) days thereafter (or such later date as may be required to comply with Code Section 409A); and (iv) any other equity-based awards shall vest in accordance with the terms of the applicable equity-based plan or grant agreement. To the extent that any equity award outstanding as of the date of this Agreement are inconsistent with this provision, they are hereby amended effective as of the date hereof.

(iv)Release Required. Any payment made under this paragraph 4(a) shall be subject to and contingent upon Executive having executed and delivered to the Company a general release in the Company’s customary form within 60 days of such termination (the “Release Execution Period”). If Executive fails to execute the release in such a timely manner so as to permit any revocation period to expire prior to the end of such 60 day period, or timely revokes his acceptance of such release following its execution, Executive shall not be entitled to any payment made under this paragraph 4(a). No payment made under this paragraph 4(a) shall be paid until the release has become effective and all such amounts shall commence to be paid on the first regular payroll date of the Company after the release has become effective; provided, that, if the Release Execution Period overlaps two calendar years, the first payment shall not be made sooner than the first day of the second year, and shall include any missed payments.

(b)Termination for Good Reason by Executive. By following the procedure set forth in paragraph 4(d), Executive shall have the right to terminate his employment with the Company for “Good Reason” in the event there is: (i) any material diminution in the scope of Executive’s authority and responsibility, including, without limitation, as a result of a reallocation of Executive’s job duties, (provided, however, that (a) in the event of any illness or injury which disables Executive from performing Executive’s duties, the Company may reassign Executive’s duties to one or more other employees until Executive is able to perform such duties; and (b) to the extent appointed to serve as Chairman of the Board, President or both, no longer serving in any such position or both shall not be a material diminution in the scope of Executive’s authority); (ii) a material diminution in Executive’s base compensation (salary, bonus opportunity, benefits or perquisites); (iii) a material change (greater than 50 miles) in the geographic location of Executive’s principal place of employment that is required by the Board; (iv) a requirement that Executive report to a supervisor other than the Company’s Board; (v) the failure of any acquirer of or successor to the Company to assume the obligations of the Company under this Agreement in connection with a Change in Control; or (vi) any other action or inaction that constitutes a material breach by the Company of this Agreement.

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(i)Cash Payments. If the employment of Executive is terminated by him during the term of this Agreement for Good Reason, Executive shall be entitled to a lump sum amount equal to two and one-half (2.5) times Annual Base Salary (as set forth in paragraph 3, and disregarding any Annual Base Salary Reduction triggering a Good Reason termination) plus two and one-half (2.5) times the average of Executive’s bonuses under the Company’s annual executive incentive plan for each of the three (3) most recent complete calendar years of Executive’s employment with the Company (or the lesser number of complete calendar years that Executive has been employed by the Company) payable within thirty (30) days after the date of termination.

(ii)Additional Payments. In addition, in the event of a termination of the Executive’s employment by Executive for Good Reason whether before, upon or after a Change in Control and such termination occurs after the end of the Company’s fiscal year but prior to the payment of any annual bonus payable to Executive under the bonus program applicable to such fiscal year, the Company shall pay Executive the annual bonus earned by Executive under such bonus program when bonuses are paid to other recipients under such bonus program, but not later than 2¹/₂ months after the end of the calendar year in which the termination occurs. If Executive timely elects to continue Executive’s group health and dental insurance coverage pursuant to applicable COBRA/continuation law and the terms of the respective benefit plans, the Company shall pay, on Executive’s behalf, the monthly premiums for such coverage for the lesser of twenty four (24) months or such time as Executive’s COBRA/continuation rights expire.

(iii)Equity Treatment. Notwithstanding the terms in any award agreement, all equity-based awards granted to Executive shall be treated as follows: (i) all unvested stock options immediately shall vest, become exercisable and together with Executive’s other vested, unexercised stock options, remain exercisable until the expiration of their full original term; (ii) all outstanding time-based restricted stock units and restricted stock automatically shall vest and be convertible into the Company’s common stock, with settlement to occur within seven (7) days thereafter (or such later date as may be required to comply with Code Section 409A); (iii) all performance-based stock units shall vest at the greater of one hundred percent (100%) of the applicable target level and actual performance determined based on the results through the last completed calendar quarter prior to the termination date and shall be convertible into the Company’s common stock, with settlement to occur within seven (7) days thereafter (or such later date as may be required to comply with Code Section 409A); and (iv) any other equity-based awards shall vest in accordance with the terms of the applicable equity-based plan or grant agreement. To the extent that any equity award outstanding as of the date of this Agreement are inconsistent with this provision, they are hereby amended effective as of the date hereof.

(iv)Release Required. Any payment made under this paragraph 4(b) shall be subject to and contingent upon Executive having executed and delivered to the Company a general release in the Company’s customary form within 60 days of such termination Release Execution Period. If Executive fails to execute the release in such a timely manner so as to permit any revocation period to expire prior to the end of such 60 day period, or timely revokes his acceptance of such release following its execution, Executive shall not be entitled to any payment made under this paragraph 4(b). No payment made under this paragraph 4(b) shall be paid until the release has become effective and all such amounts shall commence to be paid on the first regular payroll date of the Company after the release has become effective;

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provided, that, if the Release Execution Period overlaps two calendar years, the first payment shall not be made sooner than the first day of the second year, and shall include any missed payments.

(c)Termination for Cause by the Company. Termination for “Cause” shall include the following: (i) the deliberate and continued material failure by the Executive to devote substantially all the Executive’s business time and best efforts to the performance of the Executive’s duties (other than any such failure resulting from the Executive’s incapacity due to physical or mental illness or any such actual or anticipated failure after the issuance of a notice of termination for Good Reason by the Executive pursuant to paragraph 4(d) hereof) after a written demand for substantial performance is delivered to the Executive by the Board which demand specifically identifies the manner in which the Board believes the Executive has not substantially performed such duties, and the Executive fails to cure the specified performance issue within the reasonable period specified in the notice which shall not be less than thirty (30) days; (ii) a deliberate and material violation of reasonable and lawful instructions of the Board, provided such instruction does not violate this Agreement or any other written agreement between the Executive and the Company; (iii) the deliberate engaging by the Executive in gross misconduct which is demonstrably and materially injurious to the Company, monetarily or otherwise; (iv) the Executive’s conviction of, or plea of guilty or nolo contendere to, a felony or any criminal charge involving moral turpitude and all appeals from such conviction have been exhausted; or (v) Executive’s failure or refusal to comply with a reasonable and lawful policy, standard or regulation of Company in any material respect, relating to sexual harassment, other unlawful harassment or workplace discrimination.

(d)Termination by Death, Disability or Retirement of Executive. Notwithstanding any contrary provisions in any equity awards outstanding as of the day of this Agreement, upon termination as a result of death or Disability of Executive or Retirement by Executive (as hereinafter defined), any outstanding equity awards shall be treated in accordance with the terms of Section 4(a)(iii) above. For purposes of this paragraph, “Retirement” shall be defined as voluntary termination by Executive following at least ten (10) years of service with the Company on or after reaching age fifty-five (55), with one year’s advance written notice. Executive shall be deemed to have incurred a Disability if Executive is unable by reason of physical or mental disability to properly perform Executive’s duties hereunder for a period of one hundred and eighty (180) days. For purposes of this paragraph, Executive shall receive credit for Executive’s years of service with Legacy TCF.

(e)Notice and Right to Cure. In the event Executive proposes to terminate his employment for Good Reason under paragraph 4(b) above, Executive shall first provide written notice to the Company of the existence of the condition described as Good Reason in paragraph 4(b) above not more than 90 days after Executive’s actual knowledge of the initial existence of the condition. The Company will have an opportunity to correct any curable situation to the reasonable satisfaction of Executive within the period of time specified in the notice which shall not be less than thirty (30) days. If such correction is not so made or the circumstances or situation is such that it is not curable, Executive may, within thirty (30) days after the expiration of the time so fixed within which to correct such situation (but not more than two years after the initial existence of the Good Reason), give written notice to the Company that his employment is terminated for Good Reason effective forthwith.

(f)Definition of Change in Control. For the purposes of this Agreement a “Change in Control” shall be deemed to have occurred if

(i)any “person” as defined in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934 (the “Exchange Act”) is or becomes the “beneficial owner” as defined in Rule 13d-3 under the Exchange Act, directly or indirectly, of securities of the Company representing thirty percent

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(40%) or more of the combined voting power of the Company’s then outstanding securities. For purposes of this clause (a), the term “beneficial owner” does not include any employee benefit plan maintained by the Company that invests in the Company’s voting securities; or

(ii)during any period of two (2) consecutive years there shall cease to be a majority of the Board comprised as follows: individuals who at the beginning of such period constitute the Board or new directors whose nomination for election by the Company’s stockholders was approved by a vote of at least two-thirds (2/3) of the directors then still in office who either were directors at the beginning of the period or whose election or nomination for election was previously so approved;

(iii)consummation of a merger or consolidation of the Company with any other corporation, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) at least 60% of the combined voting power of the voting securities of the Company or such surviving entity outstanding immediately after such merger or consolidation, or the stockholders of the company approve a plan of complete liquidation of the Company or an agreement for the sale or disposition by the Company of all or substantially all the Company’s assets; provided, however, that no change in control will be deemed to have occurred if such merger, consolidation, sale or disposition of assets, or liquidation is not subsequently consummated; or

(iv)the Company shall be in an Active Change in Control Proposal Period; provided that at any time after which an Active Change in Control Period has ceased to exist and a Change in Control under items (i) - (iii) has not occurred, a Change in Control shall not be deemed to have occurred.

(g)the term “Active Change in Control Proposal Period” shall mean any period:

(i)during which the Board has authorized the Company’s solicitation of offers for a transaction which, if consummated, would constitute a Change in Control; or

(ii)during which the Company has received a proposal for a transaction which, if consummated, would constitute a Change in Control, and the Board has not determined to reject such proposal without any counter-offer or further discussions; or

(iii)during which any proxy solicitation or tender offer with regard to the securities of the Company is ongoing, if the intent of such proxy solicitation or tender offer is to cause the Company to solicit offers for or enter into a transaction that would constitute a Change in Control;

For the avoidance of doubt, the transactions consummated pursuant to the Merger Agreement shall not constitute a Change in Control for purposes of this Agreement.

5.Covenant Not to Compete; Non-Solicitation Covenants.

(a)Purpose. Executive understands and agrees that the purpose of this paragraph 5 is solely to protect the Company’s legitimate business interests, including, but not limited to its confidential and proprietary information, customer relationships and goodwill, and the Company’s competitive advantage. Therefore, Executive agrees to be subject to restrictive covenants under the following terms.

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(b)Definitions. As used in this Agreement, the following terms have the meanings given to such terms below.

(i)“Affiliate” means any organization controlling, controlled by or under common control with the Company.

(ii)“Business” means the business(es) in which the Company or its Affiliates were engaged in at the time of, or during the twelve (12)-month period prior to, the applicable termination date.

(iii)“Customer” means any person or entity who is or was a customer, supplier or client of the Company or its Affiliates with whom Executive had any contact or association for any reason and with whom Executive had dealings on behalf of the Company or its Affiliates in the course of his employment with the Company.

(iv)“Company Employee” means any person who is or was an employee of the Company or its Affiliates at the time of, or during the twelve (12)-month period prior to, the applicable termination date.

(v)“Restricted Period” means the period during Executive’s employment with the Company and for twenty-four (24) months from and after Executive’s applicable termination date; provided, however, that this period shall be tolled and shall not run during any time Executive is in violation of this paragraph 5, it being the intent of the parties that the Restricted Period shall be extended for any period of time in which Executive is in violation of this paragraph 5.

(vi)“Restricted Territory” means Arizona, Colorado, Illinois, Michigan, Minnesota, South Dakota, Wisconsin and any other state in which the Company or any Affiliate operates a branch at the time of, or during the twelve (12)-month period prior to, the applicable termination date.

(c)Noncompetition. During the Restricted Period, Executive shall not in the Restricted Territory, on his own behalf or on behalf of any other person:

(i)assist or have an interest in (whether or not such interest is active), whether as partner, investor, stockholder, officer, director or as any type of principal whatever, any person, firm, partnership, association, corporation or business organization, entity or enterprise that is or is about to become directly or indirectly engaged in, any business or activity (whether such enterprise is in operation or in the planning or development stage) that competes in any manner with the Business; provided, however, that Executive shall be permitted to make passive investments in the stock of any publicly traded business (including a competitive business), as long as the stock investment in any competitive business does not rise above five percent (5%) of the outstanding shares of such business; or

(ii)enter into the employment of or act as an independent contractor or agent for or advisor or consultant to, any person, firm, partnership, association, corporation, business organization, entity or enterprise that is or is about to become directly or indirectly engaged in, any business or activity (whether such enterprise is in operation or in the planning or development stage) that competes in any manner with the Business, or is a governmental regulator agency of the Business.

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(d)Non-Solicitation. During the Restricted Period, Executive shall not, directly or indirectly, on Executive’s own behalf or on behalf of any other party:

(i)Call upon, solicit, divert, encourage or attempt to call upon, solicit, divert, or encourage any Customer for purposes of marketing, selling, or providing products or services to such Customer that are similar to or competitive with those offered by the Company or its Affiliates;

(ii)Accept as a customer any Customer for purposes of marketing, selling, or providing products or services to such Customer that are similar to or competitive with those offered by the Company or its Affiliates;

(iii)Induce, encourage, or attempt to induce or encourage any Customer to purchase or accept products or services that are similar to or competitive with those offered by the Company or its Affiliates from any person or entity (other than the Company or its Affiliates) engaging in the Business;

(iv)Induce, encourage, or attempt to induce or encourage any Customer to reduce, limit, or cancel its business with the Company or its Affiliates; or

(v)Solicit, induce, or attempt to solicit or induce any the Company Employee to terminate employment with the Company or its Affiliates. Notwithstanding the foregoing, Executive may solicit a former employee of the Company, who at the time of the solicitation had been involuntarily terminated by the Company without cause, even if such former employee of the Company was employed by the Company at, or during the twelve (12)-month period immediately prior to, Executive’s termination date.

(e)Reasonableness of Restrictions. Executive acknowledges and agrees that the restrictive covenants in this Agreement: (i) are essential elements of Executive’s employment by the Company and are reasonable given Executive’s access to the Company’s and its Affiliates’ confidential information and the substantial knowledge and goodwill Executive shall acquire with respect to the business of the Company and its Affiliates as a result of his employment with the Company, and the unique and extraordinary services to be provided by Executive to the Company; and (ii) are reasonable in time, territory, and scope, and in all other respects.

(f)Preserve Livelihood. Executive represents that his experience, capabilities and personal assets are such that this Agreement does not deprive him from either earning a livelihood in the unrestricted business activities which remain open to him or from otherwise adequately and appropriately supporting himself and his family.

(g)Judicial Modification. Should any part or provision of this paragraph 5 be held invalid, void, or unenforceable in any court of competent jurisdiction, such invalidity, voidness, or unenforceability shall not render invalid, void, or unenforceable any other part or provision of this Agreement. The parties further agree that if any portion of this paragraph 5 is found to be invalid or unenforceable by a court of competent jurisdiction because its duration, territory, or other restrictions are deemed to be invalid or unreasonable in scope, the invalid or unreasonable terms shall be replaced by terms that such court deems valid and enforceable and that come closest to expressing the intention of such invalid or unenforceable terms.

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(h)Enforcement. Executive acknowledges and agrees that the Company shall suffer irreparable harm in the event that Executive materially breaches any of Executive’s obligations under this paragraph 5 and that monetary damages would be inadequate to compensate the Company for such material breach. Accordingly, Executive agrees that, in the event of a material breach by Executive of any of Executive’s obligations under this paragraph 5, the Company shall be entitled to obtain from any court of competent jurisdiction preliminary and permanent injunctive relief, and expedited discovery for the purpose of seeking relief, in order to prevent or to restrain any such material breach. The Company shall be entitled to recover its costs incurred in connection with any action to enforce this paragraph 5, including reasonable attorneys’ fees and expenses.

6.Section 280G and Executive Officer Severance Policy Compliance.

(a)Certain Payment Reductions. Anything to the contrary notwithstanding, the amount of any payment, distribution or benefit made or provided by the Company to or for the benefit of Executive in connection with a change in control of the Company or the termination of Executive’s employment with the Company, whether payable pursuant to this Agreement or any other agreement between Executive and the Company or with any person constituting a member of an “affiliated group” (as defined in Section 280G(d)(5) of the Internal Revenue Code of 1986, as amended (the “Code”)) with the Company or with any person whose actions result in a change of control of the Company (such foregoing payments or benefits referred to collectively as the “Total Payments”), shall be reduced (but not below zero) by the amount, if any, necessary to prevent any part of the Total Payments from being treated as an “excess parachute payment” within the meaning of Section 280G(b)(1) of the Code, but only if and to the extent such reduction will also result in, after taking into account all applicable state and federal taxes (computed at the highest marginal rate) including Executive’s share of F.I.C.A. and Medicare taxes and any taxes payable pursuant to Section 4999 of the Code, a greater after-tax benefit to Executive than the after-tax benefit to Executive of the Total Payments computed without regard to any such-reduction. For purposes of the foregoing, (i) no portion of the Total Payments shall be taken into account which in the opinion of tax counsel selected by the Company and acceptable to Executive does not constitute a “parachute payment” within the meaning of Section 280G(b)(2) of the Code; (ii) any reduction in payments shall be computed by taking into account that portion of Total Payments which constitute reasonable compensation within the meaning of Section 280G(b)(4) of the Code in the opinion of such tax counsel; (iii) the value of any non-cash benefit or of any deferred cash payment included in the Total Payments shall be determined by. the Company in accordance with the principles of Section 280G(d)(3)(iv) of the Code; and (iv) in the event of any uncertainty as to whether a reduction in Total Payments to Executive is required pursuant to this paragraph, the Company shall initially make the payment to Executive and Executive shall be required to refund to the Company any amounts ultimately determined not to have been payable under the terms of this paragraph 6.

(b)Determination of Certain Payment Reductions. Executive will be permitted to provide the Company with written notice specifying which of the Total Payments will be subject to reduction or elimination (the “Reduction Notice”). But, if Executive’s exercise of authority pursuant to the Reduction Notice would cause any Total Payments to become subject to any taxes or penalties pursuant to Section 409A of the Code or if Executive fails to timely provide the Company with the Reduction Notice, then the Company will reduce or eliminate the Total Payments in the following order:

(i)first, by reducing or eliminating the portion of the Total Payments that are payable in cash and

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(ii)second, by reducing or eliminating the non-cash portion of the Total Payments,

in each case, in reverse chronological order beginning with payments or benefits under the most recently dated agreement, arrangement or award.

Except as set forth in this subparagraph b., any Reduction Notice will take precedence over the provisions of any other plan, arrangement or agreement governing Executive’s rights and entitlements to any benefits or compensation.

(c)Executive Officer Severance Policy Compliance. To the extent that this Agreement would provide compensation to Executive that would violate the terms of the Company’s Executive Officer Severance Policy as from time to time adopted by the Board and in effect at the time of the termination of the Executive’s employment with the Company, Benefits (as that term is defined in the Executive Officer Severance Policy) payable to Executive shall be reduced by the Company in the smallest amount necessary to comply with the Executive Officer Severance Policy.

7.Section 409A of the Internal Revenue Code. The arrangements described in this Agreement are intended to comply with Section 409A of the Internal Revenue Code to the extent such arrangements are subject to that law. Only to the extent the payments set forth in paragraphs 4(a) and 4(b) of this Agreement are subject to Code Section 409A, and only to the further extent Executive is a “specified employee” (within the meaning of Section 409A), payments of Base Salary or annual bonus as provided in those paragraphs shall not be made until the date which is six (6) months and one day after Executive incurs a “separation of service” (within the meaning of Section 409A) and on such pay date, the Company shall pay Executive all payments that otherwise would have been paid during such six-month period but for Executive’s status as a “specified employee.” The parties agree that they will negotiate in good faith regarding amendments necessary to bring this Agreement into compliance with the terms of that Section or an exemption therefrom as interpreted by guidance issued by the Internal Revenue Service. The parties further agree that to the extent any part of this Agreement fails to qualify for exemption from or satisfy the requirements of Section 409A, the affected arrangement may be operated in compliance with Section 409A pending amendment to the extent authorized by the Internal Revenue Service. In such circumstances the Company will administer this Agreement in a manner which adheres as closely as possible to the existing terms and intent of the Agreement while complying with Section 409A. This paragraph does not restrict the Company’s rights (including, without limitation, the right to amend or terminate) with respect to this Agreement to the extent such rights are reserved under the terms of this Agreement.

8.Attorney’s Fees. In the event of a dispute between the Company and Executive relating to Executive’s services hereunder or the terms or performance of this Agreement, including, but not limited to, paragraphs 3(g) and 4(d) of this Agreement, the Company shall promptly pay Executive’s reasonable expenses of attorney’s fees and expenses in connection with such dispute upon delivery of periodic billings for same, provided that (i) Executive shall promptly repay all amounts paid under this paragraph at the conclusion of such dispute if the resolution thereof includes a finding that Executive did not act in good faith in the matter in dispute or in the dispute proceeding itself, and (ii) no claim for expenses of representation shall be submitted by Executive unless made in writing to the Board within 90 days after receipt of billing for such representation. Any such payment shall be made promptly, and in any event no later than the end of the calendar year following the year in which the expense was incurred.

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9.Other Benefits. The benefits provided under this Agreement shall, except to the extent otherwise specifically provided herein, be in addition to, and not in derogation or diminution of, any benefits that Executive or his beneficiary may be entitled to receive under any other plan or program now or hereafter maintained by the Company or TCF Subsidiaries.

10.Successors. The Company shall require any successor (whether direct or indirect, by purchase, merger, consolidation, or otherwise) to all or substantially all of the business and/or assets of the Company, to expressly assume and agree to perform its obligations under this Agreement in the same manner and to the same extent that the Company would be required to perform them if no succession had taken place unless, in the opinion of legal counsel mutually acceptable to the Company and Executive, such obligations have been assumed by the successor as a matter of law. Executive’s rights under this Agreement shall inure to the benefit of and shall be enforceable by, Executive’s legal representative or other successors in interest, but shall not otherwise be assignable or transferable.

11.Other Agreements. This Agreement supersedes and replaces as of the Effective Date all prior agreements or understandings relating to the terms of Executive’s service with the Company, including the Merger Employment Agreement. This Agreement does not supersede or replace any agreement between the Company and Executive pursuant to any plans or programs of the Company, including any stock option agreement, restricted stock agreement or supplemental retirement agreement.

12.Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Michigan. Any disputes arising under this Agreement shall be venued in the State or Federal courts located in the State of Michigan, County of Hennepin, the parties consenting to such jurisdiction.

IN WITNESS WHEREOF, the parties have duly executed this Agreement effective as of the day and year first written above.

TCF FINANCIAL CORPORATION

/s/ Joseph Green

By: Joseph Green

Its: Authorized Signatory

EXECUTIVE

/s/ Craig R. Dahl

Craig R. Dahl

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Craig R. Dahl, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of TCF Financial Corporation for the quarter ended September 30, 2019;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2019

/s/ Craig R. Dahl

Craig R. Dahl

Chief Executive Officer and President

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Dennis L. Klaeser, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of TCF Financial Corporation for the quarter ended September 30, 2019;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2019

/s/ Dennis L. Klaeser

Dennis L. Klaeser

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

TCF FINANCIAL CORPORATION

STATEMENT PURSUANT TO 18 U.S.C. §1350

I, Craig R. Dahl, Chief Executive Officer and President of TCF Financial Corporation, a Michigan corporation (the “Company”), hereby certify as follows:

1. This statement is provided pursuant to 18 U.S.C. § 1350 in connection with the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019 (the “Periodic Report”);

2. The Periodic Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

3. The information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods indicated therein.

Date: November 12, 2019

/s/ Craig R. Dahl

Craig R. Dahl

Chief Executive Officer and President

(Principal Executive Officer)

* A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to TCF Financial Corporation and will be retained by TCF Financial Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

TCF FINANCIAL CORPORATION

STATEMENT PURSUANT TO 18 U.S.C. §1350

I, Dennis L. Klaeser, Executive Vice President and Chief Financial Officer of TCF Financial Corporation, a Michigan corporation (the “Company”), hereby certify as follows:

1. This statement is provided pursuant to 18 U.S.C. § 1350 in connection with the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019 (the “Periodic Report”);

2. The Periodic Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

3. The information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods indicated therein.

Date: November 12, 2019

/s/ Dennis L. Klaeser

Dennis L. Klaeser

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

* A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to TCF Financial Corporation and will be retained by TCF Financial Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Deposits

9 Months Ended

Sep. 30, 2019

Banking and Thrift [Abstract]

Deposits

Deposits

Deposits were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Checking:
Noninterest-bearing	$	7,959,455	$	3,921,710
Interest-bearing	6,260,136		2,452,954
Total checking	14,219,591		6,374,664
Savings	8,362,170		6,122,257
Money market	3,621,729		1,193,782
Certificates of deposit	6,949,082		3,797,241
Brokered deposits	2,133,502		1,415,742
Total deposits	$	35,286,074	$	18,903,686

Excluded from total deposits are account overdrafts which have been classified as loans. At September 30, 2019 and December 31, 2018, overdrafts totaled $18.4 million and $9.6 million, respectively.

Scheduled maturities for certificates of deposits, including Certificate of Deposit Account Registry Service ("CDARS") deposits, IRA deposits and other brokered funds at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	4,813,249
2020	3,138,314
2021	266,425
2022	97,139
2023	40,823
Thereafter	30,022

The aggregate amount of certificates of deposit with balances equal to or greater than the Federal Deposit Insurance Corporation ("FDIC") insurance limit of $250,000 was $3.0 billion at September 30, 2019 and $782.4 million at December 31, 2018.

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Derivative Instruments

9 Months Ended

Sep. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

Derivatives Designated as Hedging Instruments TCF entered into an interest rate contract (interest rate swap agreement) in February 2015 related to its contemporaneously issued subordinated debt, which settles through a central clearing house. The swap was designated as a fair value hedge and effectively converts the fixed interest rate to a floating rate based on the three-month LIBOR plus a fixed number of basis points on the $150.0 million notional amount through February 27, 2025, the maturity date of the subordinated debt.

The interest rate swap substantially offsets the change in fair value of the hedged underlying subordinated debt that is attributable to the changes in market risk. The gains and losses related to changes in the fair value of the interest rate swap, as well as the offsetting changes in fair value of the hedged debt, are recorded in interest expense.

Forward foreign exchange contracts, which generally settle within 34 days, are used to manage the foreign exchange risk associated with TCF's net investment in TCF Commercial Finance Canada, Inc., a wholly-owned indirect Canadian subsidiary of TCF Bank. These forward foreign exchange contracts have been designated as net investment hedges. Changes in net investment hedges recorded within other comprehensive income (loss) are subsequently reclassified to noninterest expense during the period in which the foreign investment is substantially liquidated or when other elements of the currency translation adjustment are reclassified to income.

Derivatives Not Designated as Hedges TCF executes interest rate contracts with commercial banking customers to facilitate their respective risk management strategies. Those interest rate contracts are simultaneously hedged with offsetting interest rate contracts that TCF executes with a third party and generally settles through a central clearing house, minimizing TCF's net risk exposure. As the interest rate contracts do not meet hedge accounting requirements, changes in the fair value of both the customer contracts and the offsetting contracts are recorded in other noninterest income. These contracts have original fixed maturity dates ranging from 27 days to 16 years.

TCF executes its forward foreign exchange contracts in the over-the-counter market with large financial institutions pursuant to International Swaps and Derivatives Association, Inc. agreements. These agreements include credit risk-related features that enhance the creditworthiness of these instruments, as compared with other obligations of the respective counterparty with whom TCF has transacted, by requiring that additional collateral be posted under certain circumstances. The amount of collateral required depends on the contract and is determined daily based on market and currency exchange rate conditions. Changes in the fair value of these forward foreign exchange contracts are recorded in other noninterest expense.

TCF enters into interest rate lock commitments in conjunction with the sale of certain consumer real estate loans. These interest rate lock commitments are agreements to extend credit under certain specified terms and conditions at fixed rates with original lock expirations generally within three months. They are not designated as hedges and accordingly, changes in the valuation of these commitments are recorded in net (losses) gains on sales of loans and leases.

Residential mortgage loan commitments, forward loan sales commitments, are generally entered into at the time interest rate locks are accepted to protect the value of the mortgage loans from increases in market interest rates during the period held and are generally settled with the investor in the secondary market within 90 days after entering into the forward commitment. Certain forward loan commitments are accounted for as derivatives and recorded at fair value, with changes in fair value recorded through earnings. In the normal course of business, TCF may decide to settle a forward contract rather than fulfill the contract. Cash received or paid in this settlement manner is recorded in net (losses) gains on sales of loans and leases in the Consolidated Statements of Income and is considered a cost of executing a forward contract.

Power Equity CDs are time deposits that provide the purchaser a guaranteed return of principal at maturity plus a potential equity return (a written option), while TCF receives a known stream of funds based on the equity return (a purchased option). The written and purchased options are mirror derivative instruments which are carried at fair value. Power Equity CDs include written and purchased option derivatives consisting of instruments to facilitate an equity-linked time deposit product.

TCF's swap agreement is related to the sale of TCF's Visa Class B stock. The fair value of the swap agreement is based on TCF's estimated exposure related to the Visa covered litigation through a probability analysis of the funding and estimated settlement amounts. Changes, if any, in the valuation of this swap agreement, which has no determinable maturity date, are recorded in other noninterest expense.

Derivative instruments, recognized at fair value within other assets or other liabilities were as follows:

	At September 30, 2019
			Fair Value
(In thousands)	Notional Amount(1)		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments
Interest rate contract	$	150,000	$	—		$	11
Forward foreign exchange contracts	171,075		1,252			—
Total derivatives designated as hedging instruments	$	321,075	$	1,252		$	11
Derivatives not designated as hedging instruments
Interest rate contracts	$	4,694,964	$	130,391		$	101,899
Forward foreign exchange contracts	291,999		414			315
Interest rate lock commitments	266,949		4,554			113
Forward loan sales commitments	218,061		166			253
Power Equity CDs	31,870		617			617
Swap agreement	12,644		—			356
Total derivatives not designated as hedging instruments	$	5,516,487	$	136,142		$	103,553
Total derivatives before netting	$	5,837,562	137,394			103,564
Netting(2)			(2,152		)	(93,785		)
Total derivatives, net			$	135,242		$	9,779

	At December 31, 2018
			Fair Value
(In thousands)	Notional Amount(1)		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments
Interest rate contract	$	150,000	$	393		$	—
Forward foreign exchange contracts	157,271		2,980			—
Total derivatives designated as hedging instruments	$	307,271	$	3,373		$	—
Derivatives not designated as hedging instruments
Interest rate contracts	$	1,095,449	$	7,516		$	3,732
Forward foreign exchange contracts	254,274		3,709			13
Interest rate lock commitments	28,007		652			28
Swap agreement	13,020		—			583
Total derivatives not designated as hedging instruments	$	1,390,750	$	11,877		$	4,356
Total derivatives before netting			15,250			4,356
Netting(2)			(6,982		)	(991		)
Total derivatives, net			$	8,268		$	3,365

(1) Notional or contract amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the Consolidated Statements of Financial Condition.

(2) Includes netting of derivative asset and liability balances and related cash collateral, where counterparty netting agreements are in place.

Derivative instruments may be subject to master netting arrangements and collateral arrangements and qualify for offset in the Consolidated Statements of Financial Condition. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. Derivative instruments subject to master netting arrangements and collateral arrangements are recognized on a net basis in the Consolidated Statements of Financial Condition. The gross amounts recognized, gross amounts offset and net amount presented of derivative instruments were as follows:

	At September 30, 2019
(In thousands)	Gross Amounts Recognized		Gross Amounts  Offset(1)			Net Amount Presented
Derivative assets
Interest rate contracts	$	130,391	$	(312	)	$	130,079
Forward foreign exchange contracts	1,666		(1,666		)	—
Interest rate lock commitments	4,554		(8		)	4,546
Forward loan sales commitments	166		(166		)	—
Power Equity CDs	617		—			617
Total derivative assets	$	137,394	$	(2,152	)	$	135,242
Derivative liabilities
Interest rate contracts	$	101,910	$	(93,099	)	$	8,811
Forward foreign exchange contracts	315		(156		)	159
Interest rate lock commitments	113		(8		)	105
Forward loan sales commitments	253		(166		)	87
Power Equity CDs	617		—			617
Other contracts	356		(356		)	—
Total derivative liabilities	$	103,564	$	(93,785	)	$	9,779

	At December 31, 2018
(In thousands)	Gross Amounts Recognized		Gross Amounts Offset(1)			Net Amount Presented
Derivative assets
Interest rate contracts	$	7,909	$	(395	)	$	7,514
Forward foreign exchange contracts	6,689		(6,587		)	102
Interest rate lock commitments	652		—			652
Total derivative assets	$	15,250	$	(6,982	)	$	8,268
Derivative liabilities
Interest rate contracts	$	3,732	$	(395	)	$	3,337
Forward foreign exchange contracts	13		(13		)	—
Interest rate lock commitments	28		—			28
Swap agreement	583		(583		)	—
Total derivative liabilities	$	4,356	$	(991	)	$	3,365

(1) Includes the amounts with counterparties subject to enforceable master netting arrangements that have been offset in the Consolidated Statements of Financial Condition.

Derivatives Designated as Hedging Instruments

Interest rate contract The carrying amount of the hedged subordinated debt, including the cumulative basis adjustment related to the application of fair value hedge accounting, is recorded in long-term borrowings on the Consolidated Statements of Financial Condition and was as follows:

	Carrying Amount  of the Hedged Liability				Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Liability
(In thousands)	At September 30, 2019		At December 31, 2018		At September 30, 2019		At December 31, 2018
Subordinated bank note - 2025	$	153,307	$	144,296	$	4,682	$	(4,165	)

The following table summarizes the effect of fair value hedge accounting on the Consolidated Statements of Income for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Statement of income line where the gain (loss) on the fair value hedge was recorded:
Interest expense on borrowings	$	17,115		$	10,726		$	48,050		$	31,850
Gain (loss) on interest rate contract (fair value hedge)
Hedged item	$	(2,100	)	$	1,206		$	(8,847	)	$	6,337
Derivative designated as a hedging instrument	2,195			(1,165		)	8,938			(6,621		)
Net income (expense) recognized on fair value hedge in interest expense on borrowings	$	95		$	41		$	91		$	(284	)

Forward foreign exchange contracts The effect of net investment hedges on accumulated other comprehensive income was as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands)	2019		2018			2019			2018
Forward foreign exchange contracts	$	2,170	$	(2,537	)	$	(3,761	)	$	4,637

Derivatives Not Designated as Hedging Instruments Certain other interest rate contracts, forward foreign exchange contracts, interest rate lock commitments, Power Equity CDs and other contracts have not been designated as hedging instruments. The effect of these derivatives on the Consolidated Statements of Income was as follows:

		Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	Location of Gain (Loss)	2019			2018			2019			2018
Interest rate contracts(1)	Other noninterest income	$	(19,764	)	$	51		$	(21,307	)	$	157
Forward foreign exchange contracts	Other noninterest expense	3,307			(3,706		)	(5,302		)	8,050
Interest rate lock commitments	Net (losses) gains on sales of loans and leases	337			(244		)	1,117			798
Forward loan sales commitments	Net (losses) gains on sales of loans and leases	(11		)	—			(11		)	—
Swap agreement	Other noninterest income	4			(292		)	4			(274		)
Net gain (loss) recognized		$	(16,127	)	$	(4,191	)	$	(25,499	)	$	8,731

(1) Included in both the three and nine months ended September 30, 2019 is a loss of $17.3 million related to the termination of $1.1 billion of interest rate swaps.

At September 30, 2019 and December 31, 2018, credit risk-related contingent features existed on forward foreign exchange contracts with a notional value of $30.2 million and $25.7 million, respectively. In the event TCF is rated less than BB- by Standard and Poor's, the contracts could be terminated or TCF may be required to provide approximately $0.6 million and $0.5 million in additional collateral at September 30, 2019 and December 31, 2018, respectively. There were no forward foreign exchange contracts containing credit risk-related features in a liability position at both September 30, 2019 and December 31, 2018.

At September 30, 2019, TCF had posted $58.1 million and $0.1 million of cash collateral related to its interest rate contracts and forward foreign exchange contracts, respectively, and received $1.9 million of cash collateral related to its forward foreign exchange contracts.

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Parent Company Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Share-based compensation expense			$ 17,762	$ 14,040
Depreciation and amortization			207,954	153,018
Provision (benefit) for deferred income taxes			(27,732)	33,409
Net change in other assets			(188,081)	21,984
Net change in other liabilities			16,229	(1,849)
Other, net			(34,793)	(29,668)
Net cash provided by (used in) operating activities			155,922	410,480
Cash flows from investing activities
Purchases of premises and equipment and lease equipment			(108,404)	(903,394)
Other, net			(6,743)	15,151
Net cash provided by (used in) investing activities			1,831,104	(206,749)
Cash flows from financing activities
Redemption of Series B preferred stock			0	(100,000)
Repurchases of common stock			(58,804)	(149,912)
Common shares sold to TCF employee benefit plans			0	715
Dividends paid on preferred stock			(7,481)	(9,094)
Dividends paid on common stock			(102,368)	(74,916)
Payments related to tax-withholding upon conversion of share-based awards			(5,813)	(6,563)
Exercise of stock options			0	(997)
Net cash provided by (used in) financing activities			(1,251,069)	(255,545)
Net change in cash and due from banks			735,957	(51,814)
Cash and cash equivalents at beginning of period			587,057	621,782
Cash and cash equivalents at end of period	$ 1,323,014	$ 569,968	1,323,014	569,968
TCF
Condensed Cash Flow Statements, Captions [Line Items]
Net income	22,148	86,199	183,069	218,706
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in undistributed (earnings) loss of TCF Bank	(69,483)	(54,892)	(90,527)	108,713
Share-based compensation expense			17,762	14,041
Depreciation and amortization			99	26
Provision (benefit) for deferred income taxes			14	0
Net (losses) gains on sales of assets			(8)	(387)
Net change in other assets			(887)	975
Net change in other liabilities			(13,104)	(374)
Other, net			(2,756)	(100)
Net cash provided by (used in) operating activities			93,662	341,600
Cash flows from investing activities
Purchases of premises and equipment and lease equipment			(51)	(3)
Proceeds from sales of premises and equipment			28	17
Net cash acquired in business combination			155,154	0
Other, net			0	665
Net cash provided by (used in) investing activities			155,131	679
Cash flows from financing activities
Redemption of Series B preferred stock			0	(100,000)
Repurchases of common stock			(58,805)	(149,912)
Common shares sold to TCF employee benefit plans			0	715
Dividends paid on preferred stock			(7,482)	(9,094)
Dividends paid on common stock			(102,368)	(74,916)
Payments related to tax-withholding upon conversion of share-based awards			(5,813)	(6,563)
Exercise of stock options			0	(998)
Net cash provided by (used in) financing activities			(174,468)	(340,768)
Net change in cash and due from banks			74,325	1,511
Cash and cash equivalents at beginning of period			91,132	80,471
Cash and cash equivalents at end of period	$ 165,457	$ 81,982	$ 165,457	$ 81,982

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Fair Values Measurements - Fair Value Option (Details) - Loans Held for Sale - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Option, Quantitative Disclosures
Fair value carrying amount	$ 114,831	$ 18,070
Aggregate unpaid principal amount	111,540	17,517
Fair value carrying amount less aggregate unpaid principal	$ 3,291	$ 553

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Other Intangible Assets - Future Amortization Expense (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2019	$ 9,509
2020	27,393
2021	24,892
2022	22,531
2023	$ 20,762

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Derivative Instruments - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional Amount	$ 5,837,562,000
Forward foreign exchange contracts
Derivative [Line Items]
Forward foreign exchange contracts with credit risk-related contingent features, notional value	30,200,000	$ 25,700,000
Additional collateral required, if TCF was rated less than BB- by Standard and Poor's	600,000	500,000
Forward foreign exchange contracts with credit risk-related contingent features, net liability amount	0	0
Cash collateral posted	100,000
Cash collateral received	1,900,000
Interest rate contracts
Derivative [Line Items]
Cash collateral posted	58,100,000
Derivatives designated as hedges
Derivative [Line Items]
Notional Amount	321,075,000	307,271,000
Derivatives designated as hedges | Forward foreign exchange contracts
Derivative [Line Items]
Notional Amount	$ 171,075,000	157,271,000
Derivative term	34 days
Derivatives designated as hedges | Interest rate contracts
Derivative [Line Items]
Notional Amount	$ 150,000,000	150,000,000
Derivatives not designated as hedges
Derivative [Line Items]
Notional Amount	5,516,487,000	1,390,750,000
Derivatives not designated as hedges | Forward foreign exchange contracts
Derivative [Line Items]
Notional Amount	291,999,000	254,274,000
Derivatives not designated as hedges | Interest rate contracts
Derivative [Line Items]
Notional Amount	$ 4,694,964,000	1,095,449,000
Derivatives not designated as hedges | Interest rate contracts | Minimum
Derivative [Line Items]
Derivative term	27 days
Derivatives not designated as hedges | Interest rate contracts | Maximum
Derivative [Line Items]
Derivative term	16 years
Derivatives not designated as hedges | Swap agreement
Derivative [Line Items]
Notional Amount	$ 12,644,000	$ 13,020,000

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Cash and Cash Equivalents - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Abstract]
Reserve in cash on hand or at the Federal Reserve as required by Federal Reserve regulations	$ 149.6	$ 106.2
Total restricted cash balance	$ 72.7	$ 38.3

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Allowance for Loan and Lease Losses and Credit Quality - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Aug. 01, 2019	Dec. 31, 2018
Receivables [Abstract]
Commitments to lend additional funds			$ 500			$ 600
Other real estate owned and repossessed and returned assets, write down	$ 2,300	$ 700	5,500	$ 2,700
Business Acquisition [Line Items]
Other real estate owned			27,638			17,403
Repossessed and returned assets			$ 14,598			$ 14,574
Chemical Financial Corporation
Business Acquisition [Line Items]
Other real estate owned					$ 14,600
Repossessed and returned assets					$ 300

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Merger - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Total consideration	$ 21,743,574
Common stock, shares outstanding (in shares)	153,500,000	153,571,381		153,571,381		88,198,460
Preferred stock, shares outstanding (in shares)		7,000		7,000		7,000
Other intangible assets	$ 201,568
Estimated useful life				11 years
Goodwill	1,110,354	$ 1,265,111		$ 1,265,111		$ 154,757
Core deposit intangibles
Business Acquisition [Line Items]
Other intangible assets	177,800
Estimated useful life				10 years
Customer relationships
Business Acquisition [Line Items]
Other intangible assets	$ 23,800
Estimated useful life				15 years 7 months 6 days
Legacy TCF
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	302,065,000
Chemical Financial Corporation
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	153,479,000
TCF Financial Corporation
Business Acquisition [Line Items]
Voting interest percent	53.00%
Chemical Common Stock
Business Acquisition [Line Items]
Share conversion ratio	0.5081
Shares issued in acquisition (in shares)	81,900,000
Series C Preferred Stock
Business Acquisition [Line Items]
Annual rate of dividend (as a percent)		5.70%	5.70%	5.70%	5.70%
Series C Preferred Stock | Legacy TCF
Business Acquisition [Line Items]
Annual rate of dividend (as a percent)	5.70%
Liquidation preference (in usd per share)	$ 25,000
New Chemical Preferred Stock | Chemical Financial Corporation
Business Acquisition [Line Items]
Share conversion ratio	1
Annual rate of dividend (as a percent)	5.70%
Liquidation preference (in usd per share)	$ 25,000
Preferred stock, shares outstanding (in shares)	7,000
Depositary Shares | Chemical Financial Corporation
Business Acquisition [Line Items]
Preferred stock, shares outstanding (in shares)	7,000,000.0

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Merger - Summary of Acquired Loans (Details) $ in Thousands	Aug. 01, 2019 USD ($)
PCI loans:
Contractually required payments receivable	$ 458,374
Nonaccretable difference	(105,031)
Expected cash flows	353,343
Accretable yield	39,733
Fair value of PCI loans	313,610
Purchased nonimpaired:
Unpaid principal balance	15,636,020
Fair value discount	(223,417)
Fair value at acquisition	15,412,603
Total fair value at acquisition	$ 15,726,213

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Premises and Equipment, Net - Summary of Premises and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 1,013,236	$ 873,040
Less: Accumulated depreciation and amortization	(459,042)	(445,506)
Premises and equipment, net	554,194	427,534
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	156,380	144,754
Office buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	345,663	268,495
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	57,274	51,868
Furniture, equipment and computer software
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	450,739	404,743
Premises and equipment leased under capital leases
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	3,180	$ 3,180
Premises and equipment, net	$ 285,400

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Loan Servicing Rights - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Transfers and Servicing [Abstract]
Total loan servicing, late fee and other ancillary fee income	$ 2.8	$ 2.8

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Operating Lease Right-of-Use Assets and Liabilities - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Lease expense	$ 10,367	$ 28,488
Short-term and variable lease cost	241	332
Sublease income	(447)	(1,189)
Total lease cost for operating leases	$ 10,161	$ 27,631

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Borrowings (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Schedule of Short-term Borrowings

Short-term borrowings (borrowings with an original maturity of less than one year) were as follows:

	At September 30, 2019				At December 31, 2018
(Dollars in thousands)	Amount		Weighted-average Rate		Amount		Weighted-average Rate
FHLB advances	$	2,335,960	1.63	%	$	—	—	%
Collateralized Deposits	271,340		1.00		—		—
Total short-term borrowings	$	2,607,300	1.56		$	—	—

Schedule of Long-term Borrowings

Long-term borrowings were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
FHLB advances	$	322,674	$	1,100,000
Subordinated debt obligations	430,178		253,391
Discounted lease rentals	104,571		92,976
Capital lease obligation	3,059		3,105
Total long-term borrowings	$	860,482	$	1,449,472

Schedule of Maturities of Long-term Borrowings

The contractual maturities of long-term borrowings at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	11,138
2020	150,274
2021	29,508
2022	126,721
2023	5,960
Thereafter	536,881
Total long-term borrowings	$	860,482

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Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Series B Preferred Stock	Series C Preferred Stock	Total	Total Series B Preferred Stock	Total Series C Preferred Stock	Preferred Stock	Preferred Stock Series B Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Series B Preferred Stock	Retained Earnings Series C Preferred Stock	Accumulated Other Comprehensive Income (Loss)	Treasury Stock and Other	Non-controlling Interest
Increase (Decrease) in Equity
Change in accounting principle	$ (116)			$ (116)							$ (116)
Adjusted balance after cumulative adjustment related to change in accounting principle	2,680,468			2,662,641			$ 265,821		$ 87,474	$ 791,465	1,577,195			$ (18,517)	$ (40,797)	$ 17,827
Balance (in shares) at Dec. 31, 2017							4,007,000		87,473,708
Balance at Dec. 31, 2017	2,680,584			2,662,757			$ 265,821		$ 87,474	791,465	1,577,311			(18,517)	(40,797)	17,827
Increase (Decrease) in Equity
Net income	227,472			218,706							218,706					8,766
Other comprehensive income (loss), net of tax	(46,742)			(46,742)										(46,742)		0
Net investment by (distribution to) non-controlling interest	(5,439)															(5,439)
Redemption of Series B Preferred Stock (in shares)								(4,000,000)
Redemption of Series B Preferred Stock		$ (100,000)			$ (100,000)			$ (96,519)				$ (3,481)
Repurchases of shares of common stock	(149,912)			(149,912)											(149,912)
Dividends on Preferred Stock		$ 0	$ (9,094)		$ 0	$ (9,094)						$ 0	$ (9,094)
Dividends on common stock	(74,916)			(74,916)							(74,916)
Common stock warrants exercised (in shares)									533,548
Common stock warrants exercised									$ 534	(534)
Common shares purchased by TCF employee benefit plans (in shares)									17,594
Common shares purchased by TCF employee benefit plans	715			715					$ 17	698
Stock compensation plans, net of tax (in shares)									176,195
Stock compensation plans, net of tax	5,460			5,460					$ 176	5,284
Change in shares held in trust for deferred compensation plans, at cost										(1,057)					1,057
Balance (in shares) at Sep. 30, 2018							7,000		88,201,045
Balance at Sep. 30, 2018	2,528,012			2,506,858			$ 169,302		$ 88,201	795,856	1,708,410			(65,259)	(189,652)	21,154
Balance (in shares) at Jun. 30, 2018							7,000		88,166,532
Balance at Jun. 30, 2018	2,504,579			2,480,933			$ 169,302		$ 88,167	790,933	1,649,449			(52,811)	(164,107)	23,646
Increase (Decrease) in Equity
Net income	88,839			86,196							86,196					2,643
Other comprehensive income (loss), net of tax	(12,448)			(12,448)							0			(12,448)		0
Net investment by (distribution to) non-controlling interest	(5,135)															(5,135)
Repurchases of shares of common stock	(24,026)			(24,026)											(24,026)
Dividends on Preferred Stock			(2,494)			(2,494)							(2,494)
Dividends on common stock	(24,741)			(24,741)							(24,741)
Common stock warrants exercised (in shares)									40,304
Common stock warrants exercised									$ 40	(40)
Stock compensation plans, net of tax (in shares)									(5,791)
Stock compensation plans, net of tax	3,438			3,438					$ (6)	3,444
Change in shares held in trust for deferred compensation plans, at cost										1,519					(1,519)
Balance (in shares) at Sep. 30, 2018							7,000		88,201,045
Balance at Sep. 30, 2018	2,528,012			2,506,858			$ 169,302		$ 88,201	795,856	1,708,410			(65,259)	(189,652)	21,154
Balance (in shares) at Dec. 31, 2018							7,000		88,198,460
Balance at Dec. 31, 2018	2,556,260			2,537,801			$ 169,302		$ 88,198	798,627	1,766,994			(33,138)	(252,182)	18,459
Increase (Decrease) in Equity
Net income	192,470			183,069							183,069			0	0	9,401
Other comprehensive income (loss), net of tax	89,366			89,366							0			89,366	0	0
Reverse merger with Chemical Financial Corporation (in shares)									65,539,678
Reverse merger with Chemical Financial Corporation	3,018,556			3,018,556					$ 65,540	2,687,153					265,863
Net investment by (distribution to) non-controlling interest	(4,547)															(4,547)
Repurchases of shares of common stock	(58,805)			(58,805)											(58,805)
Dividends on Preferred Stock			(7,481)			(7,481)							(7,481)
Dividends on common stock	(102,368)			(102,368)							(102,368)
Stock compensation plans, net of tax (in shares)									(166,757)
Stock compensation plans, net of tax	9,966			9,966					$ (167)	(5,626)					15,759
Change in shares held in trust for deferred compensation plans, at cost										(1,995)					1,995
Balance (in shares) at Sep. 30, 2019							7,000		153,571,381
Balance at Sep. 30, 2019	5,693,417			5,670,104			$ 169,302		$ 153,571	3,478,159	1,840,214			56,228	(27,370)	23,313
Balance (in shares) at Jun. 30, 2019							7,000		87,943,860
Balance at Jun. 30, 2019	2,710,517			2,685,659			$ 169,302		$ 87,944	781,788	1,874,308			37,334	(265,017)	24,858
Increase (Decrease) in Equity
Net income	24,978			22,148							22,148					2,830
Other comprehensive income (loss), net of tax	18,894			18,894							0			18,894		0
Reverse merger with Chemical Financial Corporation (in shares)									65,539,678
Reverse merger with Chemical Financial Corporation	3,018,556			3,018,556					$ 65,540	2,687,153					265,863
Net investment by (distribution to) non-controlling interest	(4,375)															(4,375)
Repurchases of shares of common stock	(32,310)			(32,310)											(32,310)
Dividends on Preferred Stock			$ (2,494)			$ (2,494)							$ (2,494)
Dividends on common stock	(53,748)			(53,748)							(53,748)
Stock compensation plans, net of tax (in shares)									87,843
Stock compensation plans, net of tax	13,399			13,399					$ 87	13,070					242
Change in shares held in trust for deferred compensation plans, at cost										(3,852)					3,852
Balance (in shares) at Sep. 30, 2019							7,000		153,571,381
Balance at Sep. 30, 2019	$ 5,693,417			$ 5,670,104			$ 169,302		$ 153,571	$ 3,478,159	$ 1,840,214			$ 56,228	$ (27,370)	$ 23,313

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Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Other Intangible Assets

The following table sets forth the carrying amount and accumulated amortization of intangible assets that are amortizable and arose from business combinations or other acquisitions.

(In thousands)	Core deposit intangibles			Program agreements			Non-compete agreements			Customer relationships			Total
At September 30, 2019
Gross carrying value	$	180,837		$	14,700		$	9,250		$	24,380		$	229,167
Accumulated amortization	(6,372		)	(868		)	(5,334		)	(683		)	(13,257		)
Net carrying amount	$	174,465		$	13,832		$	3,916		$	23,697		$	215,910
At December 31, 2018
Gross carrying value	$	3,049		$	14,700		$	9,250		$	2,000		$	28,999
Accumulated amortization	(2,502		)	(408		)	(3,643		)	(1,950		)	(8,503		)
Net carrying amount	$	547		$	14,292		$	5,607		$	50		$	20,496

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated amortization expense for the remainder of 2019 through 2023 is as follows:

(In thousands)	Total
Remainder of 2019	$	9,509
2020	27,393
2021	24,892
2022	22,531
2023	20,762

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Deposits - Maturities of Certificates of Deposits (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Banking and Thrift [Abstract]
Remainder of 2019	$ 4,813,249
2020	3,138,314
2021	266,425
2022	97,139
2023	40,823
Thereafter	$ 30,022

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Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents:
Cash and due from banks	$ 586,060	$ 279,267
Interest-bearing deposits with other banks	736,954	307,790
Total cash and cash equivalents	1,323,014	587,057
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	290,238	91,654
Investment securities:
Available-for-sale, at fair value	5,579,835	2,470,065
Held-to-maturity, at amortized cost (fair value of $149,928 and $149,267)	144,000	148,852
Total investment securities	5,723,835	2,618,917
Loans and leases held-for-sale (includes $114,831 and $18,070 at fair value)	1,436,069	90,664
Loans and leases	33,510,752	19,073,020
Allowance for loan and lease losses	(121,218)	(157,446)
Loans and leases, net	33,389,534	18,915,574
Premises and equipment, net	554,194	427,534
Goodwill	1,265,111	154,757
Other intangible assets, net	215,910	20,496
Loan servicing rights	55,301	23
Other assets	1,439,305	792,936
Total assets	45,692,511	23,699,612
Deposits:
Noninterest-bearing	7,979,900	3,936,155
Interest-bearing	27,306,174	14,967,531
Total deposits	35,286,074	18,903,686
Short-term borrowings	2,607,300	0
Long-term borrowings	860,482	1,449,472
Other liabilities	1,245,238	790,194
Total liabilities	39,999,094	21,143,352
Equity
Preferred stock issued	169,302	169,302
Common stock issued	153,571	88,198
Additional paid-in capital	3,478,159	798,627
Retained earnings	1,840,214	1,766,994
Accumulated other comprehensive income (loss)	56,228	(33,138)
Treasury stock at cost, 4,909,069 shares at December 31, 2018 and other	(27,370)	(252,182)
Non-controlling interest	23,313	18,459
Total TCF Financial Corporation shareholders' equity	5,670,104	2,537,801
Total equity	5,693,417	2,556,260
Total liabilities and equity	$ 45,692,511	$ 23,699,612

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Allowance for Loan and Lease Losses and Credit Quality - Allowance for Loan and Lease Losses and Balances Outstanding by Allowance Methodology (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Allowance for loan and lease losses
Collectively evaluated for impairment	$ 96,243		$ 125,253
Individually evaluated for impairment	24,975		32,193
Total	121,218	$ 146,503	157,446	$ 160,621	$ 165,619	$ 171,041
Loans and leases outstanding
Collectively evaluated for impairment	32,972,580		18,873,126
Individually evaluated for impairment	244,459		196,078
PCI loans	293,713		3,816
Total	33,510,752		19,073,020
Consumer
Allowance for loan and lease losses
Collectively evaluated for impairment	26,024		57,113
Individually evaluated for impairment	16,763		22,904
Total	42,787	70,711	80,017	85,864	91,241	98,085
Loans and leases outstanding
Collectively evaluated for impairment	11,016,429		7,285,753
Individually evaluated for impairment	132,900		128,159
PCI loans	79,737		0
Total	11,229,066		7,413,912
Commercial
Allowance for loan and lease losses
Collectively evaluated for impairment	70,219		68,140
Individually evaluated for impairment	8,212		9,289
Total	78,431	$ 75,792	77,429	$ 74,757	$ 74,378	$ 72,956
Loans and leases outstanding
Collectively evaluated for impairment	21,956,151		11,587,373
Individually evaluated for impairment	111,559		67,919
PCI loans	213,976		3,816
Total	$ 22,281,686		$ 11,659,108

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Loans and Leases - Loan and Lease Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure
Loans and leases	$ 33,510,752	$ 19,073,020
Loan and lease adjustments	(234,400)	(1,500)
Commercial
Loans and Leases Receivable Disclosure
Loans and leases	22,281,686	11,659,108
Commercial | Commercial and industrial
Loans and Leases Receivable Disclosure
Loans and leases	10,810,534	6,220,632
Commercial | Commercial real estate
Loans and Leases Receivable Disclosure
Loans and leases	8,876,779	2,908,313
Commercial | Lease financing
Loans and Leases Receivable Disclosure
Loans and leases	2,594,373	2,530,163
Consumer
Loans and Leases Receivable Disclosure
Loans and leases	11,229,066	7,413,912
Consumer | Residential mortgage
Loans and Leases Receivable Disclosure
Loans and leases	6,057,404	2,335,835
Consumer | Consumer installment
Loans and Leases Receivable Disclosure
Loans and leases	1,562,252	2,003,572
Consumer | Home equity
Loans and Leases Receivable Disclosure
Loans and leases	$ 3,609,410	$ 3,074,505

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Investment Securities - Gross Unrealized Losses and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	$ 940,201	$ 106,329
Less than 12 months, Unrealized Losses	3,305	184
12 months or more, Fair Value	210,896	1,365,299
12 months or more, Unrealized Losses	2,848	36,023
Total, Fair Value	1,151,097	1,471,628
Total, Unrealized Losses	6,153	36,207
Gross unrealized losses and fair value of debt securities held to maturity that are in a loss position
Less than 12 months, Fair Value	4,031	3,074
Less than 12 months, Unrealized Losses	52	14
12 months or more, Fair Value	11,674	31,738
12 months or more, Unrealized Losses	142	1,031
Total, Fair Value	15,705	34,812
Total, Unrealized Losses	194	1,045
Government and government-sponsored enterprises
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	233,756
Less than 12 months, Unrealized Losses	521
12 months or more, Fair Value	0
12 months or more, Unrealized Losses	0
Total, Fair Value	233,756
Total, Unrealized Losses	521
Obligations of states and political subdivisions
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	273,967	3,620
Less than 12 months, Unrealized Losses	609	0
12 months or more, Fair Value	0	526,817
12 months or more, Unrealized Losses	0	9,479
Total, Fair Value	273,967	530,437
Total, Unrealized Losses	609	9,479
Total mortgage-backed debt securities
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	432,053
Less than 12 months, Unrealized Losses	2,150
12 months or more, Fair Value	210,896
12 months or more, Unrealized Losses	2,848
Total, Fair Value	642,949
Total, Unrealized Losses	4,998
Agency mortgage-backed securities
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	241,408	102,709
Less than 12 months, Unrealized Losses	1,479	184
12 months or more, Fair Value	210,896	838,482
12 months or more, Unrealized Losses	2,848	26,544
Total, Fair Value	452,304	941,191
Total, Unrealized Losses	4,327	26,728
Gross unrealized losses and fair value of debt securities held to maturity that are in a loss position
Less than 12 months, Fair Value	4,031	3,074
Less than 12 months, Unrealized Losses	52	14
12 months or more, Fair Value	11,674	31,738
12 months or more, Unrealized Losses	142	1,031
Total, Fair Value	15,705	34,812
Total, Unrealized Losses	194	$ 1,045
Agency collateralized mortgage obligations
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	37,750
Less than 12 months, Unrealized Losses	101
12 months or more, Fair Value	0
12 months or more, Unrealized Losses	0
Total, Fair Value	37,750
Total, Unrealized Losses	101
Non-agency collateralized mortgage obligations
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	152,895
Less than 12 months, Unrealized Losses	570
12 months or more, Fair Value	0
12 months or more, Unrealized Losses	0
Total, Fair Value	152,895
Total, Unrealized Losses	570
Corporate debt and trust preferred securities
Gross unrealized losses and fair value of debt securities available for sale that are in a loss position
Less than 12 months, Fair Value	425
Less than 12 months, Unrealized Losses	25
12 months or more, Fair Value	0
12 months or more, Unrealized Losses	0
Total, Fair Value	425
Total, Unrealized Losses	$ 25

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Loans and Leases - Undiscounted Future Minimum Lease Payments (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Receivables [Abstract]
Remainder of 2019	$ 20,087
2020	71,120
2021	48,885
2022	25,915
2023	9,777
Thereafter	4,717
Total undiscounted future minimum lease payments	$ 180,501

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Loans and Leases - Components of Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Receivables [Abstract]
Interest income on net investment in direct financing and sales-type leases	$ 32,832	$ 98,116
Lease income from operating lease payments	25,444	76,140
Profit (loss) recorded on commencement date on sales-type leases	7,983	22,289
Gains (losses) on sales of leased equipment	6,163	18,603
Leasing revenue	39,590	117,032
Total lease income	$ 72,422	$ 215,148

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Stock Based Compensation - Award Activity (Details)	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Restricted Stock Units (RSUs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	406,575
Granted (in shares) | shares	533,267
Converted in the Merger (in shares) | shares	55,022
Acquired in the Merger (in shares) | shares	824,757
Forfeited/cancelled (in shares) | shares	(20,648)
Vested (in shares) | shares	(104,652)
Outstanding at the end of the period (in shares) | shares	1,494,326
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 17.33
Granted (in usd per share)	41.51
Converted in the Merger (in usd per share)	42.06
Acquired in the Merger (in usd per share)	47.71
Forfeited/canceled (in usd per share)	41.64
Vested (in usd per share)	28.85
Outstanding at the end of the period (in dollars per share)	$ 38.46
Restricted Stock Awards (RSAs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	2,289,446
Granted (in shares) | shares	269,915
Forfeited/cancelled (in shares) | shares	(135,760)
Vested (in shares) | shares	(368,291)
Outstanding at the end of the period (in shares) | shares	929,096
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 16.70
Granted (in usd per share)	40.82
Forfeited/canceled (in usd per share)	34.15
Vested (in usd per share)	31.07
Outstanding at the end of the period (in dollars per share)	$ 40.47
Non-Vested Stock Options Outstanding
Non-Vested Stock Options Outstanding, Shares Activity
Beginning balance (in shares) | shares	0
Acquired (in shares) | shares	127,906
Forfeited/canceled (in shares) | shares	(3,094)
Expired (in shares) | shares	0
Vested (in shares) | shares	(1,144)
Ending balance (in shares) | shares	123,668
Non-Vested Stock Options Outstanding, Weighted-average Grant Date Fair Value
Beginning balance (in usd per share)	$ 0
Acquired (in usd per share)	39.38
Forfeited/canceled (in usd per share)	32.81
Expired (in usd per share)	0
Vested (in usd per share)	46.95
Ending balance (in usd per share)	$ 39.47
Stock Options Outstanding, Shares Activity
Vested (in shares) | shares	1,144
Stock Options Outstanding, Weighted-average Grant Date Fair Value
Acquired (in usd per share)	$ 39.38
Forfeited/canceled (in usd per share)	32.81
Expired (in usd per share)	0
Vested (in usd per share)	$ 46.95
Stock Options Outstanding
Non-Vested Stock Options Outstanding, Shares Activity
Vested (in shares) | shares	(1,144)
Non-Vested Stock Options Outstanding, Weighted-average Grant Date Fair Value
Acquired (in usd per share)	$ 29.48
Forfeited/canceled (in usd per share)	0
Expired (in usd per share)	32.81
Vested (in usd per share)	$ 46.95
Stock Options Outstanding, Shares Activity
Beginning balance (in shares) | shares	0
Acquired (in shares) | shares	520,379
Forfeited/canceled (in shares) | shares	0
Expired (in shares) | shares	(756)
Vested (in shares) | shares	1,144
Ending balance (in shares) | shares	520,767
Stock Options Outstanding, Weighted-average Grant Date Fair Value
Beginning balance (in usd per share)	$ 0
Acquired (in usd per share)	29.48
Forfeited/canceled (in usd per share)	0
Expired (in usd per share)	32.81
Vested (in usd per share)	46.95
Ending balance (in usd per share)	$ 29.51
Exercisable/vested (in shares) | shares	520,767
Exercisable/vested (in usd per share)	$ 29.51
Stock Options
Stock Options Outstanding, Weighted-average Grant Date Fair Value
Expiration term	10 years
Vesting term	5 years
Adjusted for Conversion | Restricted Stock Units (RSUs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	206,580
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 34.11
Adjusted for Conversion | Restricted Stock Awards (RSAs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	1,163,232
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 32.87

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Allowance for Loan and Lease Losses and Credit Quality - Summary of TDR Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	$ 107,141	$ 127,166
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	12,021	18,818
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	95,120	108,348
Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	85,904	98,459
Accruing TDR Loans | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	10,068	12,665
Accruing TDR Loans | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	75,836	85,794
Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	21,237	28,707
Nonaccrual TDR Loans | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	1,953	6,153
Nonaccrual TDR Loans | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	$ 19,284	$ 22,554

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Other Noninterest Expense - Summary of Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Outside processing	$ 12,084	$ 5,052	$ 23,475	$ 15,936
Loan and lease expense	9,323	3,313	15,986	10,430
Professional fees	7,113	5,949	18,026	16,035
Advertising and marketing	7,101	7,674	19,229	22,075
FDIC insurance	6,298	4,376	11,708	12,165
Card processing and issuance costs	5,746	4,090	14,437	12,759
Consumer Financial Protection Bureau and OCC settlement charge	0	0	0	32,000
Other	40,111	25,231	91,920	79,908
Total other noninterest expense	$ 87,776	$ 55,685	$ 194,781	$ 201,308

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Derivative Instruments - Summary of Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives
Notional Amount	$ 5,837,562
Derivative Assets	137,394	$ 15,250
Derivative Liabilities	103,564	4,356
Derivative asset netting	(2,152)	(6,982)
Derivative liability netting	(93,785)	(991)
Total derivative assets, net	135,242	8,268
Total derivative liabilities, net	9,779	3,365
Other assets
Derivatives
Derivative Assets	137,394	15,250
Derivative asset netting	(2,152)	(6,982)
Total derivative assets, net	135,242	8,268
Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	103,564	4,356
Derivative liability netting	(93,785)	(991)
Total derivative liabilities, net	9,779	3,365
Derivatives designated as hedges
Derivatives
Notional Amount	321,075	307,271
Derivatives designated as hedges | Other assets
Derivatives
Derivative Assets	1,252	3,373
Derivatives designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	11	0
Derivatives not designated as hedges
Derivatives
Notional Amount	5,516,487	1,390,750
Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	136,142	11,877
Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	103,553	4,356
Interest rate contracts
Derivatives
Derivative Assets	130,391	7,909
Derivative Liabilities	101,910	3,732
Derivative asset netting	(312)	(395)
Derivative liability netting	(93,099)	(395)
Total derivative assets, net	130,079	7,514
Total derivative liabilities, net	8,811	3,337
Interest rate contracts | Derivatives designated as hedges
Derivatives
Notional Amount	150,000	150,000
Interest rate contracts | Derivatives designated as hedges | Other assets
Derivatives
Derivative Assets	0	393
Interest rate contracts | Derivatives designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	11	0
Interest rate contracts | Derivatives not designated as hedges
Derivatives
Notional Amount	4,694,964	1,095,449
Interest rate contracts | Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	130,391	7,516
Interest rate contracts | Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	101,899	3,732
Forward foreign exchange contracts
Derivatives
Derivative Assets	1,666	6,689
Derivative Liabilities	315	13
Derivative asset netting	(1,666)	(6,587)
Derivative liability netting	(156)	(13)
Total derivative assets, net	0	102
Total derivative liabilities, net	159	0
Forward foreign exchange contracts | Derivatives designated as hedges
Derivatives
Notional Amount	171,075	157,271
Forward foreign exchange contracts | Derivatives designated as hedges | Other assets
Derivatives
Derivative Assets	1,252	2,980
Forward foreign exchange contracts | Derivatives designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	0	0
Forward foreign exchange contracts | Derivatives not designated as hedges
Derivatives
Notional Amount	291,999	254,274
Forward foreign exchange contracts | Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	414	3,709
Forward foreign exchange contracts | Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	315	13
Interest rate lock commitments
Derivatives
Derivative Assets	4,554	652
Derivative Liabilities	113	28
Derivative asset netting	(8)	0
Derivative liability netting	(8)	0
Total derivative assets, net	4,546	652
Total derivative liabilities, net	105	28
Interest rate lock commitments | Derivatives not designated as hedges
Derivatives
Notional Amount	266,949	28,007
Interest rate lock commitments | Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	4,554	652
Interest rate lock commitments | Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	113	28
Forward loan sales commitments
Derivatives
Derivative Assets	166
Derivative Liabilities	253
Derivative asset netting	(166)
Derivative liability netting	(166)
Total derivative assets, net	0
Total derivative liabilities, net	87
Forward loan sales commitments | Derivatives not designated as hedges
Derivatives
Notional Amount	218,061
Forward loan sales commitments | Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	166
Forward loan sales commitments | Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	253
Power Equity CDs
Derivatives
Derivative Assets	617
Derivative Liabilities	617
Derivative asset netting	0
Derivative liability netting	0
Total derivative assets, net	617
Total derivative liabilities, net	617
Power Equity CDs | Derivatives not designated as hedges
Derivatives
Notional Amount	31,870
Power Equity CDs | Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	617
Power Equity CDs | Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	617
Swap agreement
Derivatives
Derivative Liabilities	356	583
Derivative liability netting	(356)	(583)
Total derivative liabilities, net	0	0
Swap agreement | Derivatives not designated as hedges
Derivatives
Notional Amount	12,644	13,020
Swap agreement | Derivatives not designated as hedges | Other assets
Derivatives
Derivative Assets	0	0
Swap agreement | Derivatives not designated as hedges | Accrued expenses and other liabilities
Derivatives
Derivative Liabilities	$ 356	$ 583

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Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Segregation of Noninterest Income

The following tables present total noninterest income segregated between contracts with customers within the scope of ASC 606 and those within the scope of other GAAP topics.

	Three Months Ended September 30, 2019
	Within the scope of ASC 606								Out of scope of ASC 606			Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	29,198		$	1,308		$	—	$	3,878		$	34,384
Wealth management revenue	1,047			—			—		3,194			$	4,241
Card and ATM revenue	21,476			23			—		1,816			$	23,315
Other noninterest income	137			(2,887		)	2,610		(12,169		)	$	(12,309	)
Total	$	51,858		$	(1,556	)	$	2,610	$	(3,281	)	$	49,631
Noninterest expense
Net foreclosed real estate and repossessed assets	$	(593	)	$	214		$	—	$	2,582		$	2,203

	Three Months Ended September 30, 2018
	Within the scope of ASC 606								Out of scope of ASC 606		Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	28,055		$	1,082		$	—	$	38	$	29,175
Wealth management revenue	—			—			—		—		$	—
Card and ATM revenue	19,999			14			—		61		$	20,074
Other noninterest income	(100		)	(2,649		)	4,686		4,306		$	6,243
Total	$	47,954		$	(1,553	)	$	4,686	$	4,405	$	55,492
Noninterest expense
Net foreclosed real estate and repossessed assets	$	215		$	(59	)	$	—	$	3,724	$	3,880

	Nine Months Ended September 30, 2019
	Within the scope of ASC 606								Out of scope of ASC 606			Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	81,098		$	3,504		$	—	$	3,902		$	88,504
Wealth management revenue	1,047			—			—		3,194			$	4,241
Card and ATM revenue	60,581			62			—		1,827			$	62,470
Other noninterest income	1,504			(5,271		)	9,986		(6,531		)	$	(312	)
Total	$	144,230		$	(1,705	)	$	9,986	$	2,392		$	154,903
Noninterest expense
Net foreclosed real estate and repossessed assets	$	(152	)	$	536		$	—	$	8,897		$	9,281

	Nine Months Ended September 30, 2018
	Within the scope of ASC 606							Out of scope of ASC 606			Total
(In thousands)	Consumer Banking		Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	80,468	$	3,137		$	—	$	98		$	83,703
Wealth management revenue	—		—			—		—			$	—
Card and ATM revenue	58,095		39			—		179			$	58,313
Other noninterest income	33,729		(6,771		)	15,112		(21,450		)	$	20,620
Total	$	172,292	$	(3,595	)	$	15,112	$	(21,173	)	$	162,636
Noninterest expense
Net foreclosed real estate and repossessed assets	$	719	$	(108	)	$	—	$	12,043		$	12,654

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Other Noninterest Expense (Tables)

9 Months Ended

Sep. 30, 2019

Other Income and Expenses [Abstract]

Other Non-interest Expense

Other noninterest expense was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Outside processing	$	12,084	$	5,052	$	23,475	$	15,936
Loan and lease expense	9,323		3,313		15,986		10,430
Professional fees	7,113		5,949		18,026		16,035
Advertising and marketing	7,101		7,674		19,229		22,075
FDIC insurance	6,298		4,376		11,708		12,165
Card processing and issuance costs	5,746		4,090		14,437		12,759
Consumer Financial Protection Bureau and OCC settlement charge	—		—		—		32,000
Other	40,111		25,231		91,920		79,908
Total other noninterest expense	$	87,776	$	55,685	$	194,781	$	201,308

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Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss)
Total other comprehensive income (loss), before tax	$ 25,217	$ (17,557)	$ 116,113	$ (61,024)
Total other comprehensive income (loss), tax effect	(6,323)	5,109	(26,747)	14,282
Total other comprehensive income (loss), net of tax	18,894	(12,448)	89,366	(46,742)
Debt securities available for sale and interest-only strips
Net unrealized gains (losses) arising during the period, before tax	24,236	(18,086)	114,263	(62,521)
Net unrealized gains (losses) arising during the period, tax effect	(5,606)	4,516	(27,519)	15,688
Net unrealized gains (losses) arising during the period, net of tax	18,630	(13,570)	86,744	(46,833)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), before tax	791	179	632	1,031
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), tax effect	(191)	(43)	(153)	(257)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	600	136	479	774
Net unrealized gains (losses) on debt securities available for sale and interest-only strips, before taxes	25,027	(17,907)	114,895	(61,490)
Net unrealized gains (losses) on debt securities available for sale and interest-only strips, tax effect	(5,797)	4,473	(27,672)	15,431
Net unrealized gains (losses) on debt securities available for sale and interest-only strips, net of tax	19,230	(13,434)	87,223	(46,059)
Net investment hedges
Net unrealized gains (losses) on net investment hedges, before tax	2,170	2,537	(3,761)	4,637
Net unrealized gains (losses) on net investment hedges, tax effect	(529)	(633)	915	(1,158)
Net unrealized gains (losses) on net investment hedges, net of tax	1,641	(1,904)	(2,846)	3,479
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustment, before tax	(1,968)	2,899	5,014	(4,136)
Foreign currency translation adjustment, tax effect	0	0	0	0
Foreign currency translation adjustment, net of tax	(1,968)	2,899	5,014	(4,136)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Reclassification of amortization of prior service cost to Other non-interest expense, before tax	(12)	(12)	(35)	(35)
Reclassification of amortization of prior service cost to Other non-interest expense, tax effect	3	3	10	9
Reclassification of amortization of prior service cost to Other non-interest expense, net of tax	(9)	(9)	(25)	(26)
Total interest income
Debt securities available for sale and interest-only strips
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), before tax	844	263	2,495	810
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), tax effect	(205)	(65)	(607)	(202)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	639	198	1,888	608
Gains (losses) on debt securities, net
Debt securities available for sale and interest-only strips
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), before tax	0	0	(1,513)	0
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), tax effect	0	0	368	0
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	0	0	(1,145)	0
Other noninterest expense
Debt securities available for sale and interest-only strips
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), before tax	(53)	(84)	(350)	221
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), tax effect	14	22	86	(55)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	$ (39)	$ (62)	$ (264)	$ 166

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Borrowings - Short-term Borrowings Narrative (Details) - Revolving Line-of-Credit - USD ($)	9 Months Ended
	Sep. 30, 2019	Aug. 05, 2019
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 50,000,000.0
Eurocurrency Rate
Short-term Debt [Line Items]
Basis spread on variable rate	1.50%

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Merger (Tables)

9 Months Ended

Sep. 30, 2019

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

The table below summarizes the ownership of the combined company (TCF Financial) following the Merger, as well as the market capitalization of the combined company using shares of Chemical and Legacy TCF common stock outstanding at July 31, 2019 and Chemical’s closing price on July 31, 2019.

(In thousands)	TCF Financial Ownership and Market Value Table
	Number of Chemical Outstanding Shares	Percentage Ownership		Market Value at $42.04 Chemical Share Price
Chemical shareholders	71,559	46.62	%	$	3,008,330
Legacy TCF shareholders	81,920	53.38		3,443,938
Total	153,479	100		$	6,452,268

Next, the hypothetical number of shares Legacy TCF would have to issue to give Chemical owners the same percentage ownership in the combined company is calculated in the table below (based on shares of Legacy TCF common stock outstanding at July 31, 2019):

(In thousands)	Hypothetical Legacy TCF Ownership
	Number of Legacy TCF Outstanding Shares	Percentage Ownership
Chemical shareholders	140,836	46.62	%
Legacy TCF shareholders	161,229	53.38
Total	302,065	100	%

Finally, the purchase price is calculated based on the number of hypothetical shares of Legacy TCF common stock issued to Chemical shareholders multiplied by the share price as demonstrated in the table below (amounts in thousands except per share data).

(In thousands, except per share data)
Number of hypothetical Legacy TCF shares issued to Chemical shareholders	140,835,967
Legacy TCF market price per share as of July 31, 2019	$	21.38
Purchase price determination of hypothetical Legacy TCF shares issued to Chemical shareholders	3,011,073
Value of Chemical stock options hypothetically converted to options to acquire shares of Legacy TCF common stock	7,335
Cash in lieu of fractional shares	148
Purchase price consideration	$	3,018,556

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

While we believe that the information available on the Merger Date provided a reasonable basis for estimating fair value, we expect that we may obtain additional information and evidence during the measurement period that would result in changes to the estimated fair value amounts. The measurement period ends on the earlier of one year after the Merger Date or the date we are able to determine that we have obtained all necessary information about the facts and circumstances that existed as of Merger Date. Subsequent adjustments to fair value, if necessary, will be reflected in our future filings. These adjustments include: (i) changes in the estimated fair value of loans acquired, (ii) changes in the estimated fair value of intangible assets acquired, (iii) changes in deferred tax assets related to fair value estimates and changes in the expected realization of items considered to be net operating loss carryforwards and (iv) changes in goodwill as a result of the net effect of any adjustments.

(In thousands)
Purchase price consideration:
Stock	$	3,018,556
Fair value of assets acquired:
Cash and cash equivalents	975,014
Federal Home Loan Bank and Federal Reserve Bank stocks	218,582
Investment securities	3,774,738
Loans held-for-sale	44,532
Loans and leases	15,726,213
Premises and equipment	140,219
Loan servicing rights	59,567
Other intangible assets	201,568
Net deferred tax asset(1)	49,345
Other assets	553,796
Total assets acquired	21,743,574
Fair value of liabilities assumed:
Deposits	16,418,019
Short-term borrowings	2,629,426
Long-term borrowings	442,323
Other liabilities	345,604
Total liabilities assumed	19,835,372
Fair value of net identifiable assets	1,908,202
Goodwill resulting from Merger(2)	$	1,110,354

(1) Net deferred tax asset includes acquisition-related fair value adjustments, loss and tax credit carry forwards, mortgage servicing rights and core deposit and customer intangibles.

(2) The goodwill recorded was primarily attributable to the synergies and economies of scale expected from combining the operations of Legacy TCF and Chemical.

Summary of PCI Loans

Information regarding acquired loans included in net loans and leases acquired at the Merger Date was as follows:

(In thousands)
PCI loans:
Contractually required payments receivable	$	458,374
Nonaccretable difference	(105,031		)
Expected cash flows	353,343
Accretable yield	39,733
Fair value of PCI loans	$	313,610
Purchased nonimpaired loans and leases:
Unpaid principal balance	$	15,636,020
Fair value discount	(223,417		)
Fair value at acquisition	15,412,603
Total fair value at acquisition	$	15,726,213

The carrying value and changes in accretable yield of all PCI loans were as follows:

	At or For the Three Months Ended September 30,						At or For the Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Balance of PCI loans, beginning of period	$	2,273		$	7,033		$	3,816		$	11,844
Accretable Yield
Balance, beginning of period	$	401		$	439		$	961		$	1,051
Addition attributable to the Merger	39,733			—			39,733			—
Accretion recognized in interest income	(4,312		)	(38		)	(5,015		)	(188		)
Net reclassification (to) from nonaccretable difference	(517		)	—			179			370
Payments received	(824		)	26			(1,377		)	(806		)
Balance, end of period	$	34,481		$	427		$	34,481		$	427
Balance of PCI loans, end of period	$	293,713		$	4,802		$	293,713		$	4,802

Schedule of Cash Flow, Supplemental Disclosures

Supplemental disclosures of cash flow information related to investing and financing activities regarding the Merger are as follows for the nine months ended September 30, 2019:

(In thousands)
Business combination
Fair value of tangible assets acquired	$	21,482,439
Goodwill, loan servicing rights and other identifiable intangible assets acquired	1,371,489
Liabilities assumed	19,835,372
Common stock and stock options converted	3,018,556

Business Acquisition, Pro Forma Information

The following pro forma financial information presents the consolidated results of operations of Legacy TCF and Chemical as if the Merger had occurred as of January 1, 2018 with pro forma adjustments. The pro forma adjustments give effect to any change in interest income due to the accretion of the discount (premium) associated with the fair value adjustments to acquired loans, any change in interest expense due to estimated premium amortization/discount accretion associated with the fair value adjustments to acquired time deposits and borrowings and other debt and the amortization of the core deposit intangible that would have resulted had the deposits been acquired as of January 1, 2018. Merger-related expenses incurred by TCF during the three and nine months ended September 30, 2019 are not reflected in the pro forma amounts. The pro forma information does not necessarily reflect the results of operations that would have occurred had Legacy TCF merged with Chemical at the beginning of 2018. Anticipated cost savings that have not yet been realized are also not reflected in the pro forma amounts for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands, except per share data)	2019		2018		2019		2018
Net interest income and other noninterest income	$	536,165	$	570,396	$	1,654,571	$	1,693,537
Net income	125,560		156,977		435,003		434,686
Net income available to common shareholders	123,066		154,483		427,522		422,111
Earnings per share:
Basic	$	0.81	$	1.00	$	2.79	$	2.71
Diluted	0.81		0.99		2.77		2.69

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Reportable Segments

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Reportable Segments

Reportable Segments

TCF's reportable segments are Consumer Banking, Commercial Banking and Enterprise Services. Consumer Banking is comprised of all of TCF's consumer-facing businesses and includes retail banking, consumer lending, wealth management and small business banking. Commercial Banking, previously named Wholesale Banking, is comprised of commercial and industrial and commercial real estate banking and lease financing. Enterprise Services is comprised of (i) corporate treasury, which includes TCF's investment and borrowing portfolios and management of capital, debt and market risks, (ii) corporate functions, such as information technology, risk and credit management, bank operations, finance, investor relations, corporate development, internal audit, legal and human capital management that provide services to the operating segments, (iii) the Holding Company and (iv) eliminations.

In connection with the Merger, effective August 1, 2019, TCF renamed its Wholesale Banking segment to Commercial Banking to align with the way TCF is now managed. In addition, activity that was related to small business banking and private banking were moved from the Wholesale Banking (now named Commercial Banking) segment to the Consumer Banking segment. The revised presentation of previously reported segment data has been applied retroactively to all periods presented in these financial statements.

TCF evaluates performance and allocates resources based on each reportable segment's net income or loss. The reportable segments follow GAAP as described in Note 1. Basis of Presentation, except for the accounting for intercompany interest income and interest expense, which are eliminated in consolidation and presenting net interest income on a fully tax-equivalent basis. TCF generally accounts for inter-segment sales and transfers at cost.

Certain information for each of TCF's reportable segments, including reconciliations of TCF's consolidated totals, was as follows:

(In thousands)	Consumer Banking			Commercial Banking		Enterprise Services			Consolidated
At or For the Three Months Ended September 30, 2019
Net interest income (expense)	$	191,940		$	157,437	$	22,416		$	371,793
Provision for credit losses	4,489			22,699		—			27,188
Net interest income (expense) after provision for credit losses	187,451			134,738		22,416			344,605
Noninterest income	57,102			47,929		(10,773		)	94,258
Noninterest expense	210,728			102,841		112,051			425,620
Income tax expense (benefit)	6,817			8,172		(26,724		)	(11,735		)
Income (loss) after income tax expense (benefit)	27,008			71,654		(73,684		)	24,978
Income attributable to non-controlling interest	—			2,830		—			2,830
Preferred stock dividends	—			—		2,494			2,494
Net income (loss) available to common shareholders	$	27,008		$	68,824	$	(76,178	)	$	19,654
Total assets(1)	$	14,906,457		$	22,076,203	$	8,709,851		$	45,692,511
At or For the Three Months Ended September 30, 2018
Net interest income (expense)	$	143,015		$	94,252	$	16,235		$	253,502
Provision (benefit) for credit losses	(953		)	3,223		—			2,270
Net interest income (expense) after provision for credit losses	143,968			91,029		16,235			251,232
Noninterest income	66,621			44,934		509			112,064
Noninterest expense	162,034			77,863		6,526			246,423
Income tax expense (benefit)	11,613			12,813		3,608			28,034
Income (loss) after income tax expense (benefit)	36,942			45,287		6,610			88,839
Income attributable to non-controlling interest	—			2,643		—			2,643
Preferred stock dividends	—			—		2,494			2,494
Net income (loss) available to common shareholders	$	36,942		$	42,644	$	4,116		$	83,702
Total assets	$	8,226,522		$	11,553,453	$	3,124,810		$	22,904,785

(1) As a result of the Merger, we recorded $1.1 billion of goodwill. Due to the timing of the Merger, we are in the process of completing our analysis of the allocation of goodwill across business segments, and, therefore, goodwill is presented as part of Enterprise Services at September 30, 2019.

(In thousands)	Consumer Banking		Commercial Banking		Enterprise Services			Consolidated
At or For the Nine Months Ended September 30, 2019
Net interest income (expense)	$	470,738	$	350,848	$	58,693		$	880,279
Provision for credit losses	16,406		34,473		—			50,879
Net interest income (expense) after provision for credit losses	454,332		316,375		58,693			829,400
Noninterest income	183,767		132,883		(9,170		)	307,480
Noninterest expense	520,007		267,147		128,390			915,544
Income tax expense (benefit)	26,529		30,271		(27,934		)	28,866
Income (loss) after income tax expense (benefit)	91,563		151,840		(50,933		)	192,470
Income attributable to non-controlling interest	—		9,401		—			9,401
Preferred stock dividends	—		—		7,481			7,481
Net income (loss) available to common shareholders	$	91,563	$	142,439	$	(58,414	)	$	175,588
Total assets	$	14,906,457	$	22,076,203	$	8,709,851		$	45,692,511
At or For the Nine Months Ended September 30, 2018
Net interest income (expense)	$	429,132	$	289,315	$	36,895		$	755,342
Provision for credit losses	18,900		8,974		—			27,874
Net interest income (expense) after provision for credit losses	410,232		280,341		36,895			727,468
Total noninterest income	196,827		132,794		908			330,529
Total noninterest expense	511,915		229,094		23,433			764,442
Income tax expense (benefit)	23,037		40,505		2,541			66,083
Income (loss) after income tax expense (benefit)	72,107		143,536		11,829			227,472
Income attributable to non-controlling interest	—		8,766		—			8,766
Preferred stock dividends	—		—		9,094			9,094
Impact of preferred stock redemption	—		—		3,481			3,481
Net income (loss) available to common shareholders	$	72,107	$	134,770	$	(746	)	$	206,131
Total assets	$	8,226,522	$	11,553,453	$	3,124,810		$	22,904,785

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Other Intangible Assets

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangible Assets

Other Intangible Assets

The following table sets forth the carrying amount and accumulated amortization of intangible assets that are amortizable and arose from business combinations or other acquisitions.

(In thousands)	Core deposit intangibles			Program agreements			Non-compete agreements			Customer relationships			Total
At September 30, 2019
Gross carrying value	$	180,837		$	14,700		$	9,250		$	24,380		$	229,167
Accumulated amortization	(6,372		)	(868		)	(5,334		)	(683		)	(13,257		)
Net carrying amount	$	174,465		$	13,832		$	3,916		$	23,697		$	215,910
At December 31, 2018
Gross carrying value	$	3,049		$	14,700		$	9,250		$	2,000		$	28,999
Accumulated amortization	(2,502		)	(408		)	(3,643		)	(1,950		)	(8,503		)
Net carrying amount	$	547		$	14,292		$	5,607		$	50		$	20,496

Amortization expense recognized on intangible assets was $4.5 million and $6.2 million for the three and nine months ended September 30, 2019, respectively, and $0.9 million and $2.6 million for the same periods in 2018.

Estimated amortization expense for the remainder of 2019 through 2023 is as follows:

(In thousands)	Total
Remainder of 2019	$	9,509
2020	27,393
2021	24,892
2022	22,531
2023	20,762

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Merger

9 Months Ended

Sep. 30, 2019

Business Combinations [Abstract]

Merger

Merger

As described in Note 1. Basis of Presentation, on August 1, 2019, we completed our Merger with Legacy TCF.

The Merger was an all-stock transaction. Pursuant to the merger agreement, on the Merger Date, each holder of Legacy TCF common stock received 0.5081 shares (the "Exchange Ratio") of TCF's common stock for each share of Legacy TCF common stock held. Each outstanding share of common stock of Chemical remained outstanding and was unaffected by the Merger other than by the change of the Corporation’s name from Chemical Financial Corporation to TCF Financial Corporation. As of the effective time of the Merger on August 1, 2019, TCF Financial had approximately 153.5 million shares of common stock outstanding. On the Merger Date, the shares of Legacy TCF common stock, which previously traded under the ticker symbol "TCF" on the New York Stock Exchange (the "NYSE") ceased trading on, and were delisted from, the NYSE. Following the Merger, TCF Financial common stock continues to trade on the Nasdaq Stock Market (“NASDAQ”), but its ticker symbol changed from "CHFC" to "TCF" effective August 1, 2019.

Pursuant to the merger agreement, each outstanding share of Legacy TCF 5.70% Series C Non-Cumulative Perpetual Preferred Stock, with a liquidation preference of $25,000 per share (the "Legacy TCF Preferred Stock") was converted into the right to receive one share of newly created 5.70% Series C Non-Cumulative Perpetual Preferred Stock of TCF, with a liquidation preference of $25,000 per share (the "New TCF Preferred Stock"), and each depository share representing 1/1000^th of a share of Legacy TCF Preferred Stock was converted into one depositary share representing 1/1000th of a share of New TCF Preferred Stock. Immediately following the effective time of the Merger, as of August 1, 2019, TCF Financial had 7,000 shares of New TCF Preferred Stock outstanding and 7.0 million related depositary shares outstanding.

The Merger constituted a business combination and was accounted for as a reverse merger using the acquisition method of accounting. As a result, Legacy TCF was the accounting acquirer, and Chemical was the legal acquirer and the accounting acquiree. Therefore, the historical financial statements of Legacy TCF became the historical financial statements of the combined company. In addition, the assets, including the intangible assets identified, and liabilities of Chemical as of the Merger Date, have been recorded at their estimated fair value and added to those of Legacy TCF. In many cases, the determination of fair value required management to make estimates about discount rates, expected future cash flows, market conditions and other future events that are highly subjective in nature and subject to change.

As the legal acquirer, Chemical (now TCF Financial Corporation) issued approximately 81.9 million shares of TCF Financial common stock in connection with the Merger, which represented approximately 53% of the voting interests in TCF Financial upon completion of the Merger. Guidance in Accounting Standards Codification ("ASC") 805-40-30-2 explains that the purchase price in a reverse acquisition is determined based on “the number of equity interests the legal acquiree would have had to issue to give the owners of the legal acquirer the same percentage equity interest in the combined entity that results from the reverse acquisition.” The first step in calculating the purchase price in the Merger is to determine the ownership of the combined company following the Merger. The table below summarizes the ownership of the combined company (TCF Financial) following the Merger, as well as the market capitalization of the combined company using shares of Chemical and Legacy TCF common stock outstanding at July 31, 2019 and Chemical’s closing price on July 31, 2019.

(In thousands)	TCF Financial Ownership and Market Value Table
	Number of Chemical Outstanding Shares	Percentage Ownership		Market Value at $42.04 Chemical Share Price
Chemical shareholders	71,559	46.62	%	$	3,008,330
Legacy TCF shareholders	81,920	53.38		3,443,938
Total	153,479	100		$	6,452,268

Next, the hypothetical number of shares Legacy TCF would have to issue to give Chemical owners the same percentage ownership in the combined company is calculated in the table below (based on shares of Legacy TCF common stock outstanding at July 31, 2019):

(In thousands)	Hypothetical Legacy TCF Ownership
	Number of Legacy TCF Outstanding Shares	Percentage Ownership
Chemical shareholders	140,836	46.62	%
Legacy TCF shareholders	161,229	53.38
Total	302,065	100	%

Finally, the purchase price is calculated based on the number of hypothetical shares of Legacy TCF common stock issued to Chemical shareholders multiplied by the share price as demonstrated in the table below (amounts in thousands except per share data).

(In thousands, except per share data)
Number of hypothetical Legacy TCF shares issued to Chemical shareholders	140,835,967
Legacy TCF market price per share as of July 31, 2019	$	21.38
Purchase price determination of hypothetical Legacy TCF shares issued to Chemical shareholders	3,011,073
Value of Chemical stock options hypothetically converted to options to acquire shares of Legacy TCF common stock	7,335
Cash in lieu of fractional shares	148
Purchase price consideration	$	3,018,556

The following table provides the purchase price allocation as of the Merger Date and the Chemical assets acquired and liabilities assumed at their estimated fair value as of the Merger Date as recorded by TCF. We recorded the estimate of fair value based on initial valuations available at the Merger Date and these estimates are considered preliminary and subject to adjustment for up to one year after the Merger Date. While we believe that the information available on the Merger Date provided a reasonable basis for estimating fair value, we expect that we may obtain additional information and evidence during the measurement period that would result in changes to the estimated fair value amounts. The measurement period ends on the earlier of one year after the Merger Date or the date we are able to determine that we have obtained all necessary information about the facts and circumstances that existed as of Merger Date. Subsequent adjustments to fair value, if necessary, will be reflected in our future filings. These adjustments include: (i) changes in the estimated fair value of loans acquired, (ii) changes in the estimated fair value of intangible assets acquired, (iii) changes in deferred tax assets related to fair value estimates and changes in the expected realization of items considered to be net operating loss carryforwards and (iv) changes in goodwill as a result of the net effect of any adjustments.

(In thousands)
Purchase price consideration:
Stock	$	3,018,556
Fair value of assets acquired:
Cash and cash equivalents	975,014
Federal Home Loan Bank and Federal Reserve Bank stocks	218,582
Investment securities	3,774,738
Loans held-for-sale	44,532
Loans and leases	15,726,213
Premises and equipment	140,219
Loan servicing rights	59,567
Other intangible assets	201,568
Net deferred tax asset(1)	49,345
Other assets	553,796
Total assets acquired	21,743,574
Fair value of liabilities assumed:
Deposits	16,418,019
Short-term borrowings	2,629,426
Long-term borrowings	442,323
Other liabilities	345,604
Total liabilities assumed	19,835,372
Fair value of net identifiable assets	1,908,202
Goodwill resulting from Merger(2)	$	1,110,354

(1) Net deferred tax asset includes acquisition-related fair value adjustments, loss and tax credit carry forwards, mortgage servicing rights and core deposit and customer intangibles.

(2) The goodwill recorded was primarily attributable to the synergies and economies of scale expected from combining the operations of Legacy TCF and Chemical.

As described in more detail in Note 3. Summary of Significant Accounting Policies below, all Chemical loans and leases were recorded at their estimated fair value as of the Merger Date with no carryover of the related allowance for loans and lease losses. These loans were segregated into two classifications at acquisition, purchased credit impaired (“PCI”) loans accounted for under the provisions of Accounting Standards Codification ("ASC") Topic 310-30, and purchased nonimpaired loans, also referred to as purchased loans. The excess of cash flows expected to be collected over the estimated fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated remaining life of the loan using the effective yield method. The difference between the contractually required payments and the cash flows expected to be collected at acquisition, considering the impact of prepayment and estimates of future credit losses expected to be incurred, is referred to the nonaccretable difference.

Information regarding acquired loans included in net loans and leases acquired at the Merger Date was as follows:

(In thousands)
PCI loans:
Contractually required payments receivable	$	458,374
Nonaccretable difference	(105,031		)
Expected cash flows	353,343
Accretable yield	39,733
Fair value of PCI loans	$	313,610
Purchased nonimpaired loans and leases:
Unpaid principal balance	$	15,636,020
Fair value discount	(223,417		)
Fair value at acquisition	15,412,603
Total fair value at acquisition	$	15,726,213

Supplemental disclosures of cash flow information related to investing and financing activities regarding the Merger are as follows for the nine months ended September 30, 2019:

(In thousands)
Business combination
Fair value of tangible assets acquired	$	21,482,439
Goodwill, loan servicing rights and other identifiable intangible assets acquired	1,371,489
Liabilities assumed	19,835,372
Common stock and stock options converted	3,018,556

Other intangible assets consisted of core deposits and customer relationship intangibles with estimated fair values at the Merger Date of $177.8 million and $23.8 million, respectively. Core deposit intangibles are being amortized over a weighted-average life of ten years on an accelerated basis. Customer relationship intangibles are being amortized over a weighted-average life of 15.6 years based on expected economic benefits of the underlying intangible assets. The weighted-average life of amortizable intangibles acquired in the Merger was eleven years.

As a result of the Merger, we recorded $1.1 billion of goodwill. Due to the timing of the Merger, we are in the process of completing our analysis of the allocation of goodwill across business segments, and, therefore, goodwill is presented as part of Enterprise Services at September 30, 2019. The goodwill recorded is not deductible for income tax purposes.

Pro Forma Combined Results of Operations The following pro forma financial information presents the consolidated results of operations of Legacy TCF and Chemical as if the Merger had occurred as of January 1, 2018 with pro forma adjustments. The pro forma adjustments give effect to any change in interest income due to the accretion of the discount (premium) associated with the fair value adjustments to acquired loans, any change in interest expense due to estimated premium amortization/discount accretion associated with the fair value adjustments to acquired time deposits and borrowings and other debt and the amortization of the core deposit intangible that would have resulted had the deposits been acquired as of January 1, 2018. Merger-related expenses incurred by TCF during the three and nine months ended September 30, 2019 are not reflected in the pro forma amounts. The pro forma information does not necessarily reflect the results of operations that would have occurred had Legacy TCF merged with Chemical at the beginning of 2018. Anticipated cost savings that have not yet been realized are also not reflected in the pro forma amounts for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands, except per share data)	2019		2018		2019		2018
Net interest income and other noninterest income	$	536,165	$	570,396	$	1,654,571	$	1,693,537
Net income	125,560		156,977		435,003		434,686
Net income available to common shareholders	123,066		154,483		427,522		422,111
Earnings per share:
Basic	$	0.81	$	1.00	$	2.79	$	2.71
Diluted	0.81		0.99		2.77		2.69

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Investment Securities

9 Months Ended

Sep. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

The amortized cost and fair value of investment securities were as follows:

	Investment Securities Available-for-sale, At Fair Value
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
At September 30, 2019
Debt securities:
Government and government-sponsored enterprises	$	247,666	$	2	$	521	$	247,147
Obligations of states and political subdivisions	779,263		11,017		609		789,671
Mortgage-backed:
Agency mortgage-backed securities	3,456,110		66,929		4,327		3,518,712
Non-agency mortgage-backed securities	—		—		—		—
Agency collateralized mortgage obligations	565,959		12,484		101		578,342
Non-agency collateralized mortgage obligations	445,174		934		570		445,538
Total mortgage-backed debt securities	4,467,243		80,347		4,998		4,542,592
Corporate debt and trust preferred securities	450		—		25		425
Total debt securities available-for-sale	5,494,622		91,366		6,153		5,579,835
Total investment securities available-for-sale	$	5,494,622	$	91,366	$	6,153	$	5,579,835
At December 31, 2018
Debt securities:
Government and government-sponsored enterprises	$	—	$	—	$	—	$	—
Obligations of states and political subdivisions	566,304		46		9,479		556,871
Mortgage-backed:
Agency mortgage-backed securities	1,845,451		8,026		26,728		1,826,749
Non-agency mortgage-backed securities	—		—		—		—
Agency collateralized mortgage obligations	85,245		1,196		—		86,441
Non-agency collateralized mortgage obligations	4		—		—		4
Total mortgage-backed debt securities	1,930,700		9,222		26,728		1,913,194
Corporate debt and trust preferred securities	—		—		—		—
Total debt securities available-for-sale	2,497,004		9,268		36,207		2,470,065
Total investment securities available-for-sale	$	2,497,004	$	9,268	$	36,207	$	2,470,065

	Investment Securities Held-to-Maturity
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
At September 30, 2019
Agency mortgage-backed securities	$	140,324	$	6,122	$	194	$	146,252
Corporate debt and trust preferred securities	3,676		—		—		3,676
Total investment securities held-to-maturity	$	144,000	$	6,122	$	194	$	149,928
At December 31, 2018
Agency mortgage-backed securities	$	146,052	$	1,460	$	1,045	$	146,467
Corporate debt and trust preferred securities	2,800		—		—		2,800
Total investment securities held-to-maturity	$	148,852	$	1,460	$	1,045	$	149,267

Gross unrealized losses and fair value of investment securities aggregated by investment category and the length of time the securities were in a continuous loss position were as follows: 

	At September 30, 2019
	Less than 12 months				12 months or more				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Investment securities available-for-sale
Debt securities:
Government and government sponsored enterprises	$	233,756	$	521	$	—	$	—	$	233,756	$	521
Obligations of states and political subdivisions	273,967		609		—		—		273,967		609
Mortgage-backed:
Agency mortgage-backed securities	241,408		1,479		210,896		2,848		452,304		4,327
Agency collateralized mortgage obligations	37,750		101		—		—		37,750		101
Non-agency collateralized mortgage obligations	152,895		570		—		—		152,895		570
Total mortgage-backed debt securities	432,053		2,150		210,896		2,848		642,949		4,998
Corporate debt and trust preferred securities	425		25		—		—		425		25
Total debt securities available-for-sale	940,201		3,305		210,896		2,848		1,151,097		6,153
Total investment securities available-for-sale	$	940,201	$	3,305	$	210,896	$	2,848	$	1,151,097	$	6,153
Investment securities held-to-maturity
Agency mortgage-backed securities	4,031		52		11,674		142		15,705		194
Total investment securities held-to-maturity	$	4,031	$	52	$	11,674	$	142	$	15,705	$	194

	At December 31, 2018
	Less than 12 months				12 months or more				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Investment securities carried at fair value
Debt securities:
Obligations of states and political subdivisions	$	3,620	$	—	$	526,817	$	9,479	$	530,437	$	9,479
Agency mortgage-backed securities	102,709		184		838,482		26,544		941,191		26,728
Total debt securities available-for-sale	106,329		184		1,365,299		36,023		1,471,628		36,207
Total investment securities available-for-sale	$	106,329	$	184	$	1,365,299	$	36,023	$	1,471,628	$	36,207
Investment securities held-to-maturity
Agency mortgage-backed securities	3,074		14		31,738		1,031		34,812		1,045
Total investment securities held-to-maturity	$	3,074	$	14	$	31,738	$	1,031	$	34,812	$	1,045

At September 30, 2019 there were 1,056 investment securities in an unrealized loss position. We have assessed each investment security with unrealized losses for credit impairment. As part of that assessment we evaluated and concluded that it is more likely than not that we will not be required and do not intend to sell any of the investment securities prior to recovery of the amortized cost. Unrealized losses on investment securities were primarily due to changes in interest rates.

The gross gains and losses on sales of investment securities were as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Gross realized gains	$	7,717	$	—	$	10,872	$	—
Gross realized losses	1,849		—		3,491		—
Recoveries on previously impaired investment securities held-to-maturity	32		94		36		181
Net gains (losses) on investment securities	$	5,900	$	94	$	7,417	$	181

The amortized cost and fair value of investment securities by final contractual maturity were as follows. Securities with multiple maturity dates are classified in the period of final maturity. The final contractual maturities do not consider possible prepayments and therefore expected maturities may differ because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	At September 30, 2019				At December 31, 2018
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Investment Securities Available-for-Sale
Due in one year or less	$	60,739	$	60,652	$	—	$	—
Due in 1-5 years	199,777		199,399		24,464		24,375
Due in 5-10 years	483,336		492,755		509,832		503,768
Due after 10 years	4,750,770		4,827,029		1,962,708		1,941,922
Total investment securities available-for-sale	$	5,494,622	$	5,579,835	$	2,497,004	$	2,470,065
Investment Securities Held-to-Maturity
Due in 1-5 years	$	3,150	$	3,150	$	2,400	$	2,400
Due in 5-10 years	460		467		430		432
Due after 10 years	140,390		146,311		146,022		146,435
Total investment securities held-to-maturity	$	144,000	$	149,928	$	148,852	$	149,267

At September 30, 2019 and December 31, 2018, investment securities with a carrying value of $761.4 million and $1.6 million, respectively, were pledged as collateral to secure certain deposits and borrowings.

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Loans and Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residual value of leased assets	$ 263,300		$ 263,300
Depreciation and amortization			207,954	$ 153,018
Premises and equipment, net	554,194		554,194		$ 427,534
Impairment charges on interest-only strips	22	$ 45	43	$ 700
Premises and equipment leased under capital leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Depreciation and amortization	19,400		57,800
Premises and equipment, net	$ 285,400		$ 285,400

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Retirement Plans - Net Periodic Benefit Plan (Income) Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Pension Plans
Net periodic benefit plan (income) cost included in non-interest expense
Interest cost	$ 1,046	$ 246	$ 1,574	$ 738
Service cost	0	0	0	0
Contractual termination cost	0	0	0	0
Return on plan assets	(949)	(133)	(1,223)	(397)
Amortization of prior service credit	0	0	0	0
Amortization of unrecognized net loss	0	0	0	0
Recognized actuarial (gain) loss			0	0
Net periodic benefit plan (income) cost	97	113	351	341
Postretirement Benefit Plans
Net periodic benefit plan (income) cost included in non-interest expense
Interest cost	41	28	101	83
Service cost	0	0	0	0
Amortization of prior service credit	(11)	(12)	(35)	(35)
Amortization of unrecognized net loss	0	0	0	0
Recognized actuarial (gain) loss	0	0	0	0
Net periodic benefit plan (income) cost	$ 30	$ 16	$ 66	$ 48

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Allowance for Loan and Lease Losses and Credit Quality - Summary of TDR Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	$ 2,839	$ 3,126	$ 39,130	$ 11,416
Post-modification Investment	2,838	3,113	39,111	11,344
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	0	11	31,518	5,239
Post-modification Investment	0	11	31,518	5,239
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	0	11	0	11
Post-modification Investment	0	11	0	11
Commercial | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	0	0	31,518	5,228
Post-modification Investment	0	0	31,518	5,228
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	2,839	3,115	7,612	6,177
Post-modification Investment	2,838	3,102	7,593	6,105
Consumer | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	1,724	2,132	4,023	4,385
Post-modification Investment	1,723	2,119	4,016	4,315
Consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modification Investment	1,115	983	3,589	1,792
Post-modification Investment	$ 1,115	$ 983	$ 3,577	$ 1,790

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Reportable Segments - Summary of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Aug. 01, 2019	Dec. 31, 2018
Segment Reporting Information
Net interest income (expense)	$ 371,793	$ 253,502	$ 880,279	$ 755,342
Provision for credit losses	27,188	2,270	50,879	27,874
Net interest income after provision for credit losses	344,605	251,232	829,400	727,468
Noninterest income	94,258	112,064	307,480	330,529
Noninterest expense	425,620	246,423	915,544	764,442
Income tax (benefit) expense	(11,735)	28,034	28,866	66,083
Income after income tax (benefit) expense	24,978	88,839	192,470	227,472
Income attributable to non-controlling interest	2,830	2,643	9,401	8,766
Preferred stock dividends	2,494	2,494	7,481	9,094
Impact of preferred stock redemption	0	0	0	3,481
Net income available to common shareholders	19,654	83,702	175,588	206,131
Total assets	45,692,511	22,904,785	45,692,511	22,904,785		$ 23,699,612
Goodwill	1,265,111		1,265,111		$ 1,110,354	$ 154,757
Consumer Banking
Segment Reporting Information
Net interest income (expense)	191,940	143,015	470,738	429,132
Provision for credit losses	4,489	(953)	16,406	18,900
Net interest income after provision for credit losses	187,451	143,968	454,332	410,232
Noninterest income	57,102	66,621	183,767	196,827
Noninterest expense	210,728	162,034	520,007	511,915
Income tax (benefit) expense	6,817	11,613	26,529	23,037
Income after income tax (benefit) expense	27,008	36,942	91,563	72,107
Income attributable to non-controlling interest	0	0	0	0
Preferred stock dividends	0	0	0	0
Impact of preferred stock redemption				0
Net income available to common shareholders	27,008	36,942	91,563	72,107
Total assets	14,906,457	8,226,522	14,906,457	8,226,522
Commercial Banking
Segment Reporting Information
Net interest income (expense)	157,437	94,252	350,848	289,315
Provision for credit losses	22,699	3,223	34,473	8,974
Net interest income after provision for credit losses	134,738	91,029	316,375	280,341
Noninterest income	47,929	44,934	132,883	132,794
Noninterest expense	102,841	77,863	267,147	229,094
Income tax (benefit) expense	8,172	12,813	30,271	40,505
Income after income tax (benefit) expense	71,654	45,287	151,840	143,536
Income attributable to non-controlling interest	2,830	2,643	9,401	8,766
Preferred stock dividends	0	0	0	0
Impact of preferred stock redemption				0
Net income available to common shareholders	68,824	42,644	142,439	134,770
Total assets	22,076,203	11,553,453	22,076,203	11,553,453
Enterprise Services
Segment Reporting Information
Net interest income (expense)	22,416	16,235	58,693	36,895
Provision for credit losses	0	0	0	0
Net interest income after provision for credit losses	22,416	16,235	58,693	36,895
Noninterest income	(10,773)	509	(9,170)	908
Noninterest expense	112,051	6,526	128,390	23,433
Income tax (benefit) expense	(26,724)	3,608	(27,934)	2,541
Income after income tax (benefit) expense	(73,684)	6,610	(50,933)	11,829
Income attributable to non-controlling interest	0	0	0	0
Preferred stock dividends	2,494	2,494	7,481	9,094
Impact of preferred stock redemption				3,481
Net income available to common shareholders	(76,178)	4,116	(58,414)	(746)
Total assets	$ 8,709,851	$ 3,124,810	$ 8,709,851	$ 3,124,810

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Allowance for Loan and Lease Losses and Credit Quality - Rollfowards of the Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for loan and lease losses
Balance, beginning of period	$ 146,503	$ 165,619	$ 157,446	$ 171,041
Charge-offs	(35,547)	(19,448)	(81,044)	(57,501)
Recoveries	6,969	12,658	19,730	23,790
Net (charge-offs) recoveries	(28,578)	(6,790)	(61,314)	(33,711)
Provision for credit losses	27,188	2,270	50,879	27,874
Other	(23,895)	(478)	(25,793)	(4,583)
Balance, end of period	121,218	160,621	121,218	160,621
Consumer
Allowance for loan and lease losses
Balance, beginning of period	70,711	91,241	80,017	98,085
Charge-offs	(14,098)	(15,942)	(43,922)	(48,120)
Recoveries	5,330	11,711	15,840	21,299
Net (charge-offs) recoveries	(8,768)	(4,231)	(28,082)	(26,821)
Provision for credit losses	4,693	(847)	16,644	18,872
Other	(23,849)	(299)	(25,792)	(4,272)
Balance, end of period	42,787	85,864	42,787	85,864
Commercial
Allowance for loan and lease losses
Balance, beginning of period	75,792	74,378	77,429	72,956
Charge-offs	(21,449)	(3,506)	(37,122)	(9,381)
Recoveries	1,639	947	3,890	2,491
Net (charge-offs) recoveries	(19,810)	(2,559)	(33,232)	(6,890)
Provision for credit losses	22,495	3,117	34,235	9,002
Other	(46)	(179)	(1)	(311)
Balance, end of period	$ 78,431	$ 74,757	$ 78,431	$ 74,757

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Investment Securities - Amortized Cost and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Amortized cost
Due in one year or less	$ 60,739	$ 0
Due in 1-5 years	199,777	24,464
Due in 5-10 years	483,336	509,832
Due after 10 years	4,750,770	1,962,708
Amortized Cost	5,494,622	2,497,004
Fair value
Due in one year or less	60,652	0
Due in 1-5 years	199,399	24,375
Due in 5-10 years	492,755	503,768
Due after 10 years	4,827,029	1,941,922
Total investment securities available-for-sale	5,579,835	2,470,065
Amortized cost
Due in 1-5 years	3,150	2,400
Due in 5-10 years	460	430
Due after 10 years	140,390	146,022
Amortized Cost	144,000	148,852
Fair value
Due in 1-5 years	3,150	2,400
Due in 5-10 years	467	432
Due after 10 years	146,311	146,435
Fair Value	$ 149,928	$ 149,267

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Investment Securities - Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt securities available for sale:
Amortized Cost	$ 5,494,622	$ 2,497,004
Gross Unrealized Gains	91,366	9,268
Gross Unrealized Losses	6,153	36,207
Available-for-sale, at fair value	5,579,835	2,470,065
Debt securities held to maturity:
Amortized Cost	144,000	148,852
Gross Unrealized Gains	6,122	1,460
Gross Unrealized Losses	194	1,045
Fair Value	149,928	149,267
Government and government-sponsored enterprises
Debt securities available for sale:
Amortized Cost	247,666	0
Gross Unrealized Gains	2	0
Gross Unrealized Losses	521	0
Available-for-sale, at fair value	247,147	0
Obligations of states and political subdivisions
Debt securities available for sale:
Amortized Cost	779,263	566,304
Gross Unrealized Gains	11,017	46
Gross Unrealized Losses	609	9,479
Available-for-sale, at fair value	789,671	556,871
Total mortgage-backed debt securities
Debt securities available for sale:
Amortized Cost	4,467,243	1,930,700
Gross Unrealized Gains	80,347	9,222
Gross Unrealized Losses	4,998	26,728
Available-for-sale, at fair value	4,542,592	1,913,194
Agency mortgage-backed securities
Debt securities available for sale:
Amortized Cost	3,456,110	1,845,451
Gross Unrealized Gains	66,929	8,026
Gross Unrealized Losses	4,327	26,728
Available-for-sale, at fair value	3,518,712	1,826,749
Debt securities held to maturity:
Amortized Cost	140,324	146,052
Gross Unrealized Gains	6,122	1,460
Gross Unrealized Losses	194	1,045
Fair Value	146,252	146,467
Non-agency mortgage-backed securities
Debt securities available for sale:
Amortized Cost	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Available-for-sale, at fair value	0	0
Agency collateralized mortgage obligations
Debt securities available for sale:
Amortized Cost	565,959	85,245
Gross Unrealized Gains	12,484	1,196
Gross Unrealized Losses	101	0
Available-for-sale, at fair value	578,342	86,441
Non-agency collateralized mortgage obligations
Debt securities available for sale:
Amortized Cost	445,174	4
Gross Unrealized Gains	934	0
Gross Unrealized Losses	570	0
Available-for-sale, at fair value	445,538	4
Corporate debt and trust preferred securities
Debt securities available for sale:
Amortized Cost	450	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	25	0
Available-for-sale, at fair value	425	0
Debt securities held to maturity:
Amortized Cost	3,676	2,800
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 3,676	$ 2,800

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Loans and Leases - Undiscounted Future Minimum Lease Payments Receivable (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Receivables [Abstract]
Remainder of 2019	$ 51,851
2020	333,516
2021	459,359
2022	554,951
2023	563,752
Thereafter	612,063
Equipment under leases not yet commenced	47,948
Total undiscounted future minimum lease payments receivable for direct financing and sales-type leases	2,623,440
Third-party residual value guarantees	58,657
Total carrying amount of direct financing and sales-type leases	$ 2,682,097

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Borrowings - Contractual Maturities of Long-term Debt (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Debt Disclosure [Abstract]
Remainder of 2019	$ 11,138
2020	150,274
2021	29,508
2022	126,721
2023	5,960
Thereafter	536,881
Long-term Debt	$ 860,482

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Borrowings - Schedule of Short-term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Amount	$ 2,607,300	$ 0
Weighted-average Rate	1.56%	0.00%
FHLB advances
Short-term Debt [Line Items]
Amount	$ 2,335,960	$ 0
Weighted-average Rate	1.63%	0.00%
Collateralized Deposits
Short-term Debt [Line Items]
Amount	$ 271,340	$ 0
Weighted-average Rate	1.00%	0.00%

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Regulatory Capital Requirements - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Percentage of net retained profits for the current year combined with retained net profits for the preceding two calendar years that can be declared as dividend	100.00%
TCF Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Net profits for the current year combined with retained net profits for preceding two calendar years	$ 296.6

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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Restricted Stock Award Transactions

A summary of the activity for RSUs at and for the nine months ended September 30, 2019 is presented below:

	Number of Units		Weighted-average Grant Date Fair Value Per Unit
Outstanding at December 31, 2018	406,575		$	17.33
Outstanding at December 31, 2018 as adjusted for conversion	206,580		34.11
Granted	533,267		41.51
Converted in the Merger(1)	55,022		42.06
Acquired in the Merger	824,757		47.71
Forfeited/canceled	(20,648	)	41.64
Vested	(104,652	)	28.85
Outstanding at September 30, 2019	1,494,326		$	38.46

(1)

In connection with the Merger, certain Legacy TCF PRSUs were converted at their maximum payout into 55,022 TRSUs.

TCF's restricted stock award transactions were as follows:

	Number of Awards		Weighted-Average Grant Date Fair Value Per Award
Outstanding at December 31, 2018	2,289,446		$	16.70
Outstanding at December 31, 2018 as adjusted for conversion	1,163,232		32.87
Granted	269,915		40.82
Forfeited/canceled	(135,760	)	34.15
Vested	(368,291	)	31.07
Outstanding at September 30, 2019	929,096		$	40.47

Stock Option Activity

A summary of activity for TCF's stock options at and for the nine months ended September 30, 2019 is presented below:

	Non-Vested Stock Options Outstanding				Stock Options Outstanding
	Number of Options		Weighted-average Exercise Price		Number of Options		Weighted- average Exercise Price
Outstanding at December 31, 2018	—		$	—	—		$	—
Acquired(1)	127,906		39.38		520,379		29.48
Forfeited/canceled	(3,094	)	32.81		—		—
Expired	—		—		(756	)	32.81
Vested	(1,144	)	46.95		1,144		46.95
Outstanding at September 30, 2019	123,668		$	39.47	520,767		$	29.51
Exercisable/vested at September 30, 2019					520,767		$	29.51

(1)

Options acquired in the Merger expire ten years from the date of grant and vest ratably over a five-year period.

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Reportable Segments (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Reportable Segments, Including a Reconciliation of Consolidated Totals

Certain information for each of TCF's reportable segments, including reconciliations of TCF's consolidated totals, was as follows:

(In thousands)	Consumer Banking			Commercial Banking		Enterprise Services			Consolidated
At or For the Three Months Ended September 30, 2019
Net interest income (expense)	$	191,940		$	157,437	$	22,416		$	371,793
Provision for credit losses	4,489			22,699		—			27,188
Net interest income (expense) after provision for credit losses	187,451			134,738		22,416			344,605
Noninterest income	57,102			47,929		(10,773		)	94,258
Noninterest expense	210,728			102,841		112,051			425,620
Income tax expense (benefit)	6,817			8,172		(26,724		)	(11,735		)
Income (loss) after income tax expense (benefit)	27,008			71,654		(73,684		)	24,978
Income attributable to non-controlling interest	—			2,830		—			2,830
Preferred stock dividends	—			—		2,494			2,494
Net income (loss) available to common shareholders	$	27,008		$	68,824	$	(76,178	)	$	19,654
Total assets(1)	$	14,906,457		$	22,076,203	$	8,709,851		$	45,692,511
At or For the Three Months Ended September 30, 2018
Net interest income (expense)	$	143,015		$	94,252	$	16,235		$	253,502
Provision (benefit) for credit losses	(953		)	3,223		—			2,270
Net interest income (expense) after provision for credit losses	143,968			91,029		16,235			251,232
Noninterest income	66,621			44,934		509			112,064
Noninterest expense	162,034			77,863		6,526			246,423
Income tax expense (benefit)	11,613			12,813		3,608			28,034
Income (loss) after income tax expense (benefit)	36,942			45,287		6,610			88,839
Income attributable to non-controlling interest	—			2,643		—			2,643
Preferred stock dividends	—			—		2,494			2,494
Net income (loss) available to common shareholders	$	36,942		$	42,644	$	4,116		$	83,702
Total assets	$	8,226,522		$	11,553,453	$	3,124,810		$	22,904,785

(1) As a result of the Merger, we recorded $1.1 billion of goodwill. Due to the timing of the Merger, we are in the process of completing our analysis of the allocation of goodwill across business segments, and, therefore, goodwill is presented as part of Enterprise Services at September 30, 2019.

(In thousands)	Consumer Banking		Commercial Banking		Enterprise Services			Consolidated
At or For the Nine Months Ended September 30, 2019
Net interest income (expense)	$	470,738	$	350,848	$	58,693		$	880,279
Provision for credit losses	16,406		34,473		—			50,879
Net interest income (expense) after provision for credit losses	454,332		316,375		58,693			829,400
Noninterest income	183,767		132,883		(9,170		)	307,480
Noninterest expense	520,007		267,147		128,390			915,544
Income tax expense (benefit)	26,529		30,271		(27,934		)	28,866
Income (loss) after income tax expense (benefit)	91,563		151,840		(50,933		)	192,470
Income attributable to non-controlling interest	—		9,401		—			9,401
Preferred stock dividends	—		—		7,481			7,481
Net income (loss) available to common shareholders	$	91,563	$	142,439	$	(58,414	)	$	175,588
Total assets	$	14,906,457	$	22,076,203	$	8,709,851		$	45,692,511
At or For the Nine Months Ended September 30, 2018
Net interest income (expense)	$	429,132	$	289,315	$	36,895		$	755,342
Provision for credit losses	18,900		8,974		—			27,874
Net interest income (expense) after provision for credit losses	410,232		280,341		36,895			727,468
Total noninterest income	196,827		132,794		908			330,529
Total noninterest expense	511,915		229,094		23,433			764,442
Income tax expense (benefit)	23,037		40,505		2,541			66,083
Income (loss) after income tax expense (benefit)	72,107		143,536		11,829			227,472
Income attributable to non-controlling interest	—		8,766		—			8,766
Preferred stock dividends	—		—		9,094			9,094
Impact of preferred stock redemption	—		—		3,481			3,481
Net income (loss) available to common shareholders	$	72,107	$	134,770	$	(746	)	$	206,131
Total assets	$	8,226,522	$	11,553,453	$	3,124,810		$	22,904,785

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Business Combinations

Business Combinations Pursuant to the guidance of ASC Topic 805 ("ASC 805"), TCF recognized assets acquired, including identified intangible assets, and the liabilities assumed in mergers and acquisitions at their fair values as of the acquisition date, with the acquisition and merger-related transaction and restructuring costs expensed in the period incurred.

ASC 805 affords a measurement period beyond the acquisition date that allows the opportunity to finalize the acquisition accounting in the event that new information is identified that existed as of the acquisition date but was not known or available at that time. This measurement period ends on the earlier of one year after the acquisition or the date information about the facts and circumstances that existed at the acquisition are available. TCF anticipates that measurement period adjustments may arise from adjustments to the fair values of Chemical's assets and liabilities recorded at the Merger Date, as additional information and evidence is obtained. In the event that a measurement period adjustment is identified, TCF will recognize the adjustment as part of its acquisition accounting, which may result in an adjustment to goodwill in the period the adjustment was identified.

See Note 2. Merger for further information.

Loans and Leases Acquired in a Business Combination We record loans and leases acquired in a business combination at fair value at the acquisition date and the fair value discount or premium is recognized as an adjustment to yield over the remaining life of each loan or lease. Credit discounts are included in the determination of fair value; therefore, an allowance for loan and lease losses is not recorded at the acquisition date. Purchased loans are evaluated at the acquisition date and classified as either (i) loans purchased without evidence of deteriorated credit quality since origination, referred to as purchased loans, or (ii) loans purchased with evidence of deteriorated credit quality since origination for which it is probable that all contractually required payments will not be collected, referred to as PCI loans. PCI loans are considered to be impaired and are accounted for under ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality ("ASC 310-30"). In determining whether a purchased loan should be classified as a PCI loan, we must make numerous assumptions, interpretations and judgments using internal and third-party credit quality information to determine whether or not it is probable that we will be able to collect all contractually required payments. This is a point in time assessment and is inherently subjective due to the nature of the available information and judgment involved. Evidence of credit quality deterioration as of the acquisition date may include statistics such as past due and nonaccrual status, recent borrower credit scores and loan-to-value percentages. The excess of cash flows expected to be collected over the estimated fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated remaining life of the loan using the effective yield method. We estimate the expected cash flows based on the expected remaining life of the loans, which includes the effects of estimated prepayments and estimates of future credit losses. Cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change. The difference between the contractually required payments and the cash flows expected to be collected at acquisition, is referred to as the nonaccretable difference.

We do not classify PCI loans as nonaccrual loans subsequent to acquisition because the loans are recorded at net realizable value based on the principal and interest expected to be collected on the loan. Judgment is required to estimate the timing and amount of cash flows expected to be collected when the loans are not performing in accordance with the original contractual terms.

Purchased loans outside the scope of ASC 310-30 are accounted for under ASC 310-20, Receivables - Nonrefundable Fees and Other Costs. For purchased loans, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value and the discount is accreted to interest income over the life of the loan. Subsequent to the purchase date, the method used to evaluate the sufficiency of the credit discount is similar to originated loans, and if necessary, additional reserves are recognized in the allowance for loan and lease losses.

Leases

Leases TCF enters into lease contracts as both a lessor and a lessee. A contract, or part of a contract, is considered a lease if it conveys the right to obtain substantially all of the economic benefits from, and the right to direct and use, an identified asset for a period of time in exchange for consideration. The determination of lease classification requires various judgments and estimates by management which may include the fair value of the equipment at lease inception, useful life of the equipment under lease, estimate of the lease residual value and collectability of minimum lease payments. Management has policies and procedures in place for the determination of lease classification and review of the related judgments and estimates for all leases.

As a lessor, TCF provides various types of lease financing that are classified for accounting purposes as direct financing, sales-type or operating leases. Leases that transfer substantially all of the benefits and risks of ownership to the lessee are classified as direct financing or sales-type leases and are recorded in loans and leases. Direct financing and sales-type leases are carried at the combined present value of future minimum lease payments and lease residual values.

Interest income on net investment in direct financing and sales-type leases is recognized using methods that approximate a level yield over the fixed, non-cancelable term of the lease, including pro rata rent payments received for the interim period until the lease contract commences and the fixed, non-cancelable lease term begins. Sales-type leases generate selling profit (loss), which is recognized on the commencement date by recording lease revenue net of lease cost. Lease revenue consists of the present value of the future minimum lease payments and lease cost consists of the leased equipment's net book value, less the present value of its residual.

Some lease financing contracts include a residual value component, which represents the estimated fair value of the leased equipment at the expiration of the initial term of the transaction. The estimation of residual values involves judgment regarding product and technology changes, customer behavior, shifts in supply and demand and other economic assumptions. TCF reviews residual assumptions when assessing potential impairment of the net investment in direct financing and sales-type leases each quarter. Decreases in the expected residual value are reflected through an increase in the provision for credit losses, which results in an increase to the allowance for loan and lease losses.

TCF may sell minimum lease payment receivables, primarily as a credit risk reduction tool, to third-party financial institutions at fixed rates, on a non-recourse basis, with its underlying equipment as collateral. For those transactions that qualify for sale accounting, the related lease cash flow stream and the non-recourse financing are derecognized. For those transactions that do not qualify for sale accounting, the underlying lease remains on TCF's Consolidated Statements of Financial Condition and non-recourse debt is recorded in the amount of the proceeds received. TCF retains servicing of these leases and bills, collects and remits funds to the third-party financial institution. Upon default by the lessee, the third-party financial institutions may take control of the underlying collateral which TCF would otherwise retain as residual value.

Leases that do not transfer substantially all benefits and risks of ownership to the lessee are classified as operating leases. Such leased equipment and related initial direct costs are included in other assets and depreciated to their estimated salvage value on a straight-line basis over the term of the lease. Lease financing equipment depreciation is recorded in noninterest expense. Operating lease payments received are recognized as lease income when due and recorded as a component of leasing and equipment finance noninterest income. An allowance for lease losses is not provided on operating leases.

See Note 7. Loans and Leases for further information.

As a lessee, TCF enters into contracts to lease real estate, information technology equipment and various other types of equipment. Leases that transfer substantially all of the benefits and risks of ownership to TCF are classified as finance leases, while all others are classified as operating leases. At lease commencement, a lease liability and right-of-use asset are calculated and recognized for both types of leases. The lease liability is equal to the present value of future minimum lease payments. The right-of-use asset is equal to the lease liability, plus any initial direct costs and prepaid lease payments, less any lease incentives received. Operating lease right-of-use assets are recorded in other assets and finance lease right-of-use assets are recorded in premises and equipment, net. TCF uses the appropriate term Federal Home Loan Bank ("FHLB") rate to determine the discount rate for the present value calculation of future minimum payments when an implicit rate is not known for a given lease. The lease term used in the calculation includes any options to extend that TCF is reasonably certain to exercise.

Subsequent to lease commencement, lease liabilities recorded for finance leases are measured using the effective interest rate method and the related right-of-use assets are amortized on a straight-line basis over the lease term. Interest expense and amortization expense are recorded separately in the income statement in interest expense on borrowings and occupancy and equipment noninterest expense, respectively. For operating leases, total lease cost is comprised of lease expense, short-term lease cost, variable lease cost and sublease income. Lease expense includes future minimum lease payments, which are recognized on a straight-line basis over the lease term, as well as common area maintenance charges, real estate taxes, insurance and other expenses, where applicable, which are expensed as incurred. Total lease cost for operating leases is recorded in occupancy and equipment noninterest expense.

See Note 12. Operating Lease Right-of-Use Assets and Liabilities for further information.

Leases

Leases TCF enters into lease contracts as both a lessor and a lessee. A contract, or part of a contract, is considered a lease if it conveys the right to obtain substantially all of the economic benefits from, and the right to direct and use, an identified asset for a period of time in exchange for consideration. The determination of lease classification requires various judgments and estimates by management which may include the fair value of the equipment at lease inception, useful life of the equipment under lease, estimate of the lease residual value and collectability of minimum lease payments. Management has policies and procedures in place for the determination of lease classification and review of the related judgments and estimates for all leases.

As a lessor, TCF provides various types of lease financing that are classified for accounting purposes as direct financing, sales-type or operating leases. Leases that transfer substantially all of the benefits and risks of ownership to the lessee are classified as direct financing or sales-type leases and are recorded in loans and leases. Direct financing and sales-type leases are carried at the combined present value of future minimum lease payments and lease residual values.

Interest income on net investment in direct financing and sales-type leases is recognized using methods that approximate a level yield over the fixed, non-cancelable term of the lease, including pro rata rent payments received for the interim period until the lease contract commences and the fixed, non-cancelable lease term begins. Sales-type leases generate selling profit (loss), which is recognized on the commencement date by recording lease revenue net of lease cost. Lease revenue consists of the present value of the future minimum lease payments and lease cost consists of the leased equipment's net book value, less the present value of its residual.

Some lease financing contracts include a residual value component, which represents the estimated fair value of the leased equipment at the expiration of the initial term of the transaction. The estimation of residual values involves judgment regarding product and technology changes, customer behavior, shifts in supply and demand and other economic assumptions. TCF reviews residual assumptions when assessing potential impairment of the net investment in direct financing and sales-type leases each quarter. Decreases in the expected residual value are reflected through an increase in the provision for credit losses, which results in an increase to the allowance for loan and lease losses.

TCF may sell minimum lease payment receivables, primarily as a credit risk reduction tool, to third-party financial institutions at fixed rates, on a non-recourse basis, with its underlying equipment as collateral. For those transactions that qualify for sale accounting, the related lease cash flow stream and the non-recourse financing are derecognized. For those transactions that do not qualify for sale accounting, the underlying lease remains on TCF's Consolidated Statements of Financial Condition and non-recourse debt is recorded in the amount of the proceeds received. TCF retains servicing of these leases and bills, collects and remits funds to the third-party financial institution. Upon default by the lessee, the third-party financial institutions may take control of the underlying collateral which TCF would otherwise retain as residual value.

Leases that do not transfer substantially all benefits and risks of ownership to the lessee are classified as operating leases. Such leased equipment and related initial direct costs are included in other assets and depreciated to their estimated salvage value on a straight-line basis over the term of the lease. Lease financing equipment depreciation is recorded in noninterest expense. Operating lease payments received are recognized as lease income when due and recorded as a component of leasing and equipment finance noninterest income. An allowance for lease losses is not provided on operating leases.

See Note 7. Loans and Leases for further information.

As a lessee, TCF enters into contracts to lease real estate, information technology equipment and various other types of equipment. Leases that transfer substantially all of the benefits and risks of ownership to TCF are classified as finance leases, while all others are classified as operating leases. At lease commencement, a lease liability and right-of-use asset are calculated and recognized for both types of leases. The lease liability is equal to the present value of future minimum lease payments. The right-of-use asset is equal to the lease liability, plus any initial direct costs and prepaid lease payments, less any lease incentives received. Operating lease right-of-use assets are recorded in other assets and finance lease right-of-use assets are recorded in premises and equipment, net. TCF uses the appropriate term Federal Home Loan Bank ("FHLB") rate to determine the discount rate for the present value calculation of future minimum payments when an implicit rate is not known for a given lease. The lease term used in the calculation includes any options to extend that TCF is reasonably certain to exercise.

Subsequent to lease commencement, lease liabilities recorded for finance leases are measured using the effective interest rate method and the related right-of-use assets are amortized on a straight-line basis over the lease term. Interest expense and amortization expense are recorded separately in the income statement in interest expense on borrowings and occupancy and equipment noninterest expense, respectively. For operating leases, total lease cost is comprised of lease expense, short-term lease cost, variable lease cost and sublease income. Lease expense includes future minimum lease payments, which are recognized on a straight-line basis over the lease term, as well as common area maintenance charges, real estate taxes, insurance and other expenses, where applicable, which are expensed as incurred. Total lease cost for operating leases is recorded in occupancy and equipment noninterest expense.

See Note 12. Operating Lease Right-of-Use Assets and Liabilities for further information.

Loan Servicing Rights

Loan Servicing Rights Loan servicing rights ("LSRs") are recognized as assets or liabilities as a result of selling residential mortgage and commercial real estate loans in the secondary market while retaining the right to service these loans and receive servicing income over the life of the loan, and from acquisitions of other banks that had LSRs. An LSR is recorded at estimated fair value when initially recognized. Fair value is determined by the present value of expected cash flows received in excess of a market servicing rate. If the amount earned to service assets is equal to the market rate, no value is recorded. Subsequently, LSRs are accounted for at the lower of amortized cost or fair value and amortized in proportion to and over the period of net servicing income. Unexpected prepayments of mortgage loans result in increased amortization of LSRs, as the remaining book value of the LSRs is expensed at the time of prepayment. LSRs are assessed quarterly for impairment. See Note 11. Loan Servicing Rights for further information.

Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Effective January 1, 2019, TCF adopted ASU No. 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes, which permits the use of the OIS Rate based on the SOFR as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct Treasury obligations of the U.S. government, the London Interbank Offered Rate ("LIBOR") swap rate, the OIS Rate based on the Fed Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. The adoption of this ASU was on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after January 1, 2019. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force), which requires the decision to capitalize or expense implementation costs incurred in a cloud computing arrangement (i.e. a hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40. TCF's policy had been to expense these costs as incurred. The adoption of this ASU was on a prospective basis. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, which simplifies the accounting for share-based payments to nonemployees by aligning it more consistently with the accounting for share-based payments to employees. The new guidance in ASC 718 supersedes the guidance in ASC 505-50. The adoption of this ASU was on a modified retrospective basis with no cumulative effect adjustment recorded. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2017-11, Earnings Per Share (Topic 260): Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, which simplifies the accounting for certain equity-linked financial instruments and embedded features with the down round features that reduce the exercise price when the pricing of a future round of financing is lower. The adoption of this ASU was on a modified retrospective basis. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2016-02, Leases (Topic 842), which, along with other amendments, requires lessees to recognize most leases on their balance sheet. Lessor accounting is largely unchanged. The ASU requires both quantitative and qualitative disclosure regarding key information about leasing arrangements from both lessees and lessors. Effective January 1, 2019, TCF also adopted the following ASUs, which further amend the original lease guidance in Topic 842: (i) ASU No. 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840) and Leases (Topic 842): Amendments to SEC Paragraphs, which rescinds certain SEC Observer comments and staff announcements from the lease guidance and incorporates SEC staff announcements on the effect of a change in tax law on leveraged leases from ASC 840 into ASC 842; (ii) ASU No. 2018-01, Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842, which amends the new lease guidance to add an optional transition practical expedient that permits an entity to continue applying its current accounting policy for land easements that existed or expired before January 1, 2019; (iii) ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which makes narrow scope improvements to the standard for specific issues; (iv) ASU No. 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method allowing the standard to be applied at the adoption date and provides a practical expedient related to separating components of a contract for lessors; (v) ASU No. 2018-20, Leases (Topic 842): Narrow-Scope Improvements for Lessors, which allows lessors to elect to account for all sales taxes as lessee costs, instead of determining whether they are lessee or lessor costs in each individual jurisdiction. It requires lessor costs paid by lessees directly to third parties to be excluded from revenue, requires lessors to account for costs excluded from the consideration of a contract that are paid by the lessor as revenue and requires certain variable payments to be allocated (rather than recognized) to lease and nonlease components when changes occur in the facts and circumstances on which the variable payments are based; and (vi) ASU No. 2019-01, Leases (Topic 842): Codification Improvements, which allows lessors that are not manufacturers or dealers to calculate the fair value of an underlying asset as its cost less any volume or trade discount, requires lessors to classify principal payments received from direct financing and sales-type leases as investing activities in the statement of cash flows and clarifies that certain disclosure requirements that were explicitly excluded from annual reporting during the year of adoption are also excluded from interim reporting during the same year. These

ASUs were adopted on a modified retrospective basis. Management elected the practical expedients and optional transition method, which allow for leases entered into prior to January 1, 2019 to be accounted for consistent with prior guidance. Management evaluated TCF's leasing contracts and activities, and developed methodologies and processes to estimate and account for the right-of-use assets and lease liabilities based on the present value of future lease payments. On January 1, 2019, TCF recorded right-of-use assets and lease liabilities totaling $91.9 million and $112.8 million, respectively. TCF also recorded additional right-of-use assets and lease liabilities totaling $39.8 million and $41.6 million on August 1, 2019 as a result of the Merger. The impact to capital ratios as a result of increased risk-weighted assets is immaterial. The adoption of this guidance did not result in a material change to lessee expense recognition. The changes to lessor accounting, as well as changes in customer behavior driven by the adoption of these ASUs, impacts the results of TCF's leasing and equipment financing businesses, including earlier recognition of expense due to a narrower definition of initial direct costs and the timing of revenue recognition for certain leases, resulting in more revenue being deferred over the lease term.

Recently Issued but Not Yet Adopted Accounting Pronouncements

In November 2018, the Financial Accounting Standards Board (the "FASB") issued ASU No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606, which makes targeted improvements to the accounting for collaborative arrangements in response to questions raised as a result of the issuance of ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities, which provides an elective exemption to private companies from applying variable interest entities ("VIE") guidance to all entities under common control if certain criteria are met. In addition, this ASU contains an amendment applicable to all entities which amends how a decision maker or service provider determines whether its fee is a variable interest in a VIE when a related party under common control also has an interest in the VIE. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement, which eliminates, adds and modifies certain disclosure requirements for fair value measurements. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Certain of the amendments require prospective application, while the remainder require retrospective application. Early adoption is allowed either for the entire standard or only the provisions that eliminate or modify the requirements. Management is currently evaluating which adoption method will be selected as well as the related potential impact of this guidance on our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This ASU simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Subsequent to adoption, goodwill impairment will be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance largely remains unchanged. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020 on a prospective basis. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which changes the impairment model for most financial assets (including off-balance sheet exposure), including trade and other receivables, debt securities held to maturity, loans, net investments in leases and purchased financial assets with credit deterioration. The ASU requires the use of a current expected credit loss ("CECL") methodology to determine the allowance for credit losses for loans and debt securities held to maturity. CECL requires loss estimates for the remaining estimated life of the asset to be measured using historical loss data as well as reasonable and supportable forecasts based on current and forecasted economic conditions. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, which clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 and should be accounted for in accordance with Topic 842. In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and

Hedging, and Topic 825, Financial Instruments, which clarifies and corrects certain unintended applications of the guidance contained in each of the amended Topics. In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments - Credit Losses (Topic 326): Targeted Transition Relief, which provides an option to irrevocably elect the fair value option in Subtopic 825-10 to certain instruments within the scope of Subtopic 326-20 upon adoption of Topic 326. The adoption of these ASUs will be required on a modified retrospective basis with a cumulative effect adjustment required beginning January 1, 2020 with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. CECL represents a significant change in GAAP and is expected to result in a material impact to our consolidated financial statements and capital ratios. The impact of these ASUs will depend on the composition of TCF's portfolios, the current economic conditions, and forecasted macroeconomic conditions at the date of adoption. Additionally, industry practice and interpretation of the ASUs continues to evolve which may impact management's implementation of the standard.

TCF has established a governance structure to implement these ASUs and has developed a majority of the methodology and models to be used upon adoption. Based on parallel runs of the CECL process that TCF has performed alongside our current allowance for loan and lease losses process, we preliminarily estimated that the adoption of the standard will increase the allowance for loan and lease losses between 35% to 45% on Legacy TCF portfolios, when compared to current allowance for loan and lease loss levels. At September 30, 2019, Legacy TCF loan and lease portfolios totaled approximately $17.8 billion with a corresponding allowance for loans and lease losses of approximately $117.1 million. The largest impact is anticipated to be to our consumer segment given the longer duration of the portfolios. Management is in the process of finalizing model validations and approval of all key design decisions through its governance structure, which includes decisions about the methodology for estimating reserves for unfunded commitments and disclosures. The estimated impact of the standard depends on the composition of the portfolio, credit quality, economic conditions and forecasts at the time of adoption, as well as final decisions by management, all of which could result in a change to management’s estimate.

With the close of the Merger on August 1, 2019, management is evaluating the impact of CECL on the acquired legacy Chemical portfolio which will then be included in the combined portfolio of TCF upon adoption. The loans and leases acquired in the Merger were recorded at estimated fair value on the Merger Date, which includes an estimate of credit losses. Under current GAAP, an allowance for loan and lease losses is not recorded on these loans and leases until there is evidence of credit deterioration post acquisition. However, upon adoption of CECL an allowance for loan and lease loss will need to be recorded for the acquired loans based on the lifetime loss concept within CECL. We are in the process of developing CECL assumptions on the acquired Chemical portfolios with those used by Legacy TCF. Since these assumptions could materially impact the estimate of the allowance for loan and lease losses under CECL, we are unable to estimate the impact on the Chemical portfolio at this time.

The initial increase to TCF's allowance for loan and lease losses will be recorded as an adjustment to beginning of the year retained earnings. Post adoption, as loans and leases are added to the portfolio, we expect higher levels of allowance for loan and lease losses determined by CECL assumptions, resulting in higher levels of provision for credit losses. Management will continue to refine this process during the fourth quarter of 2019 as well as consider the impacts the Merger will have on the adoption of the standard.

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Other Noninterest Expense

9 Months Ended

Sep. 30, 2019

Other Income and Expenses [Abstract]

Other Noninterest Expense

Other Noninterest Expense

Other noninterest expense was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Outside processing	$	12,084	$	5,052	$	23,475	$	15,936
Loan and lease expense	9,323		3,313		15,986		10,430
Professional fees	7,113		5,949		18,026		16,035
Advertising and marketing	7,101		7,674		19,229		22,075
FDIC insurance	6,298		4,376		11,708		12,165
Card processing and issuance costs	5,746		4,090		14,437		12,759
Consumer Financial Protection Bureau and OCC settlement charge	—		—		—		32,000
Other	40,111		25,231		91,920		79,908
Total other noninterest expense	$	87,776	$	55,685	$	194,781	$	201,308

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Accounting policies in effect at December 31, 2018, as previously disclosed in Note 2. Summary of Significant Accounting Policies in Legacy TCF’s audited Consolidated Financial Statements at and for the year ended December 31, 2018, which were filed as Exhibit 99.1 to TCF’s Current Report on Form 8-K filed with the SEC on August 1, 2019, remain significantly unchanged and have been followed similarly as in previous periods except for the lease financing accounting policy, resulting from the adoption of Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842) and related ASUs, and certain policies added as a result of the Merger, as described below.

Business Combinations Pursuant to the guidance of ASC Topic 805 ("ASC 805"), TCF recognized assets acquired, including identified intangible assets, and the liabilities assumed in mergers and acquisitions at their fair values as of the acquisition date, with the acquisition and merger-related transaction and restructuring costs expensed in the period incurred.

ASC 805 affords a measurement period beyond the acquisition date that allows the opportunity to finalize the acquisition accounting in the event that new information is identified that existed as of the acquisition date but was not known or available at that time. This measurement period ends on the earlier of one year after the acquisition or the date information about the facts and circumstances that existed at the acquisition are available. TCF anticipates that measurement period adjustments may arise from adjustments to the fair values of Chemical's assets and liabilities recorded at the Merger Date, as additional information and evidence is obtained. In the event that a measurement period adjustment is identified, TCF will recognize the adjustment as part of its acquisition accounting, which may result in an adjustment to goodwill in the period the adjustment was identified.

See Note 2. Merger for further information.

Loans and Leases Acquired in a Business Combination We record loans and leases acquired in a business combination at fair value at the acquisition date and the fair value discount or premium is recognized as an adjustment to yield over the remaining life of each loan or lease. Credit discounts are included in the determination of fair value; therefore, an allowance for loan and lease losses is not recorded at the acquisition date. Purchased loans are evaluated at the acquisition date and classified as either (i) loans purchased without evidence of deteriorated credit quality since origination, referred to as purchased loans, or (ii) loans purchased with evidence of deteriorated credit quality since origination for which it is probable that all contractually required payments will not be collected, referred to as PCI loans. PCI loans are considered to be impaired and are accounted for under ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality ("ASC 310-30"). In determining whether a purchased loan should be classified as a PCI loan, we must make numerous assumptions, interpretations and judgments using internal and third-party credit quality information to determine whether or not it is probable that we will be able to collect all contractually required payments. This is a point in time assessment and is inherently subjective due to the nature of the available information and judgment involved. Evidence of credit quality deterioration as of the acquisition date may include statistics such as past due and nonaccrual status, recent borrower credit scores and loan-to-value percentages. The excess of cash flows expected to be collected over the estimated fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated remaining life of the loan using the effective yield method. We estimate the expected cash flows based on the expected remaining life of the loans, which includes the effects of estimated prepayments and estimates of future credit losses. Cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change. The difference between the contractually required payments and the cash flows expected to be collected at acquisition, is referred to as the nonaccretable difference.

We do not classify PCI loans as nonaccrual loans subsequent to acquisition because the loans are recorded at net realizable value based on the principal and interest expected to be collected on the loan. Judgment is required to estimate the timing and amount of cash flows expected to be collected when the loans are not performing in accordance with the original contractual terms.

Purchased loans outside the scope of ASC 310-30 are accounted for under ASC 310-20, Receivables - Nonrefundable Fees and Other Costs. For purchased loans, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value and the discount is accreted to interest income over the life of the loan. Subsequent to the purchase date, the method used to evaluate the sufficiency of the credit discount is similar to originated loans, and if necessary, additional reserves are recognized in the allowance for loan and lease losses.

Leases TCF enters into lease contracts as both a lessor and a lessee. A contract, or part of a contract, is considered a lease if it conveys the right to obtain substantially all of the economic benefits from, and the right to direct and use, an identified asset for a period of time in exchange for consideration. The determination of lease classification requires various judgments and estimates by management which may include the fair value of the equipment at lease inception, useful life of the equipment under lease, estimate of the lease residual value and collectability of minimum lease payments. Management has policies and procedures in place for the determination of lease classification and review of the related judgments and estimates for all leases.

As a lessor, TCF provides various types of lease financing that are classified for accounting purposes as direct financing, sales-type or operating leases. Leases that transfer substantially all of the benefits and risks of ownership to the lessee are classified as direct financing or sales-type leases and are recorded in loans and leases. Direct financing and sales-type leases are carried at the combined present value of future minimum lease payments and lease residual values.

Interest income on net investment in direct financing and sales-type leases is recognized using methods that approximate a level yield over the fixed, non-cancelable term of the lease, including pro rata rent payments received for the interim period until the lease contract commences and the fixed, non-cancelable lease term begins. Sales-type leases generate selling profit (loss), which is recognized on the commencement date by recording lease revenue net of lease cost. Lease revenue consists of the present value of the future minimum lease payments and lease cost consists of the leased equipment's net book value, less the present value of its residual.

Some lease financing contracts include a residual value component, which represents the estimated fair value of the leased equipment at the expiration of the initial term of the transaction. The estimation of residual values involves judgment regarding product and technology changes, customer behavior, shifts in supply and demand and other economic assumptions. TCF reviews residual assumptions when assessing potential impairment of the net investment in direct financing and sales-type leases each quarter. Decreases in the expected residual value are reflected through an increase in the provision for credit losses, which results in an increase to the allowance for loan and lease losses.

TCF may sell minimum lease payment receivables, primarily as a credit risk reduction tool, to third-party financial institutions at fixed rates, on a non-recourse basis, with its underlying equipment as collateral. For those transactions that qualify for sale accounting, the related lease cash flow stream and the non-recourse financing are derecognized. For those transactions that do not qualify for sale accounting, the underlying lease remains on TCF's Consolidated Statements of Financial Condition and non-recourse debt is recorded in the amount of the proceeds received. TCF retains servicing of these leases and bills, collects and remits funds to the third-party financial institution. Upon default by the lessee, the third-party financial institutions may take control of the underlying collateral which TCF would otherwise retain as residual value.

Leases that do not transfer substantially all benefits and risks of ownership to the lessee are classified as operating leases. Such leased equipment and related initial direct costs are included in other assets and depreciated to their estimated salvage value on a straight-line basis over the term of the lease. Lease financing equipment depreciation is recorded in noninterest expense. Operating lease payments received are recognized as lease income when due and recorded as a component of leasing and equipment finance noninterest income. An allowance for lease losses is not provided on operating leases.

See Note 7. Loans and Leases for further information.

As a lessee, TCF enters into contracts to lease real estate, information technology equipment and various other types of equipment. Leases that transfer substantially all of the benefits and risks of ownership to TCF are classified as finance leases, while all others are classified as operating leases. At lease commencement, a lease liability and right-of-use asset are calculated and recognized for both types of leases. The lease liability is equal to the present value of future minimum lease payments. The right-of-use asset is equal to the lease liability, plus any initial direct costs and prepaid lease payments, less any lease incentives received. Operating lease right-of-use assets are recorded in other assets and finance lease right-of-use assets are recorded in premises and equipment, net. TCF uses the appropriate term Federal Home Loan Bank ("FHLB") rate to determine the discount rate for the present value calculation of future minimum payments when an implicit rate is not known for a given lease. The lease term used in the calculation includes any options to extend that TCF is reasonably certain to exercise.

Subsequent to lease commencement, lease liabilities recorded for finance leases are measured using the effective interest rate method and the related right-of-use assets are amortized on a straight-line basis over the lease term. Interest expense and amortization expense are recorded separately in the income statement in interest expense on borrowings and occupancy and equipment noninterest expense, respectively. For operating leases, total lease cost is comprised of lease expense, short-term lease cost, variable lease cost and sublease income. Lease expense includes future minimum lease payments, which are recognized on a straight-line basis over the lease term, as well as common area maintenance charges, real estate taxes, insurance and other expenses, where applicable, which are expensed as incurred. Total lease cost for operating leases is recorded in occupancy and equipment noninterest expense.

See Note 12. Operating Lease Right-of-Use Assets and Liabilities for further information.

Loan Servicing Rights Loan servicing rights ("LSRs") are recognized as assets or liabilities as a result of selling residential mortgage and commercial real estate loans in the secondary market while retaining the right to service these loans and receive servicing income over the life of the loan, and from acquisitions of other banks that had LSRs. An LSR is recorded at estimated fair value when initially recognized. Fair value is determined by the present value of expected cash flows received in excess of a market servicing rate. If the amount earned to service assets is equal to the market rate, no value is recorded. Subsequently, LSRs are accounted for at the lower of amortized cost or fair value and amortized in proportion to and over the period of net servicing income. Unexpected prepayments of mortgage loans result in increased amortization of LSRs, as the remaining book value of the LSRs is expensed at the time of prepayment. LSRs are assessed quarterly for impairment. See Note 11. Loan Servicing Rights for further information.

Recently Adopted Accounting Pronouncements

Effective January 1, 2019, TCF adopted ASU No. 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes, which permits the use of the OIS Rate based on the SOFR as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct Treasury obligations of the U.S. government, the London Interbank Offered Rate ("LIBOR") swap rate, the OIS Rate based on the Fed Funds Effective Rate and the Securities Industry and Financial Markets Association Municipal Swap Rate. The adoption of this ASU was on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after January 1, 2019. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force), which requires the decision to capitalize or expense implementation costs incurred in a cloud computing arrangement (i.e. a hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40. TCF's policy had been to expense these costs as incurred. The adoption of this ASU was on a prospective basis. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, which simplifies the accounting for share-based payments to nonemployees by aligning it more consistently with the accounting for share-based payments to employees. The new guidance in ASC 718 supersedes the guidance in ASC 505-50. The adoption of this ASU was on a modified retrospective basis with no cumulative effect adjustment recorded. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2017-11, Earnings Per Share (Topic 260): Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, which simplifies the accounting for certain equity-linked financial instruments and embedded features with the down round features that reduce the exercise price when the pricing of a future round of financing is lower. The adoption of this ASU was on a modified retrospective basis. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Effective January 1, 2019, TCF adopted ASU No. 2016-02, Leases (Topic 842), which, along with other amendments, requires lessees to recognize most leases on their balance sheet. Lessor accounting is largely unchanged. The ASU requires both quantitative and qualitative disclosure regarding key information about leasing arrangements from both lessees and lessors. Effective January 1, 2019, TCF also adopted the following ASUs, which further amend the original lease guidance in Topic 842: (i) ASU No. 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840) and Leases (Topic 842): Amendments to SEC Paragraphs, which rescinds certain SEC Observer comments and staff announcements from the lease guidance and incorporates SEC staff announcements on the effect of a change in tax law on leveraged leases from ASC 840 into ASC 842; (ii) ASU No. 2018-01, Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842, which amends the new lease guidance to add an optional transition practical expedient that permits an entity to continue applying its current accounting policy for land easements that existed or expired before January 1, 2019; (iii) ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which makes narrow scope improvements to the standard for specific issues; (iv) ASU No. 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method allowing the standard to be applied at the adoption date and provides a practical expedient related to separating components of a contract for lessors; (v) ASU No. 2018-20, Leases (Topic 842): Narrow-Scope Improvements for Lessors, which allows lessors to elect to account for all sales taxes as lessee costs, instead of determining whether they are lessee or lessor costs in each individual jurisdiction. It requires lessor costs paid by lessees directly to third parties to be excluded from revenue, requires lessors to account for costs excluded from the consideration of a contract that are paid by the lessor as revenue and requires certain variable payments to be allocated (rather than recognized) to lease and nonlease components when changes occur in the facts and circumstances on which the variable payments are based; and (vi) ASU No. 2019-01, Leases (Topic 842): Codification Improvements, which allows lessors that are not manufacturers or dealers to calculate the fair value of an underlying asset as its cost less any volume or trade discount, requires lessors to classify principal payments received from direct financing and sales-type leases as investing activities in the statement of cash flows and clarifies that certain disclosure requirements that were explicitly excluded from annual reporting during the year of adoption are also excluded from interim reporting during the same year. These

ASUs were adopted on a modified retrospective basis. Management elected the practical expedients and optional transition method, which allow for leases entered into prior to January 1, 2019 to be accounted for consistent with prior guidance. Management evaluated TCF's leasing contracts and activities, and developed methodologies and processes to estimate and account for the right-of-use assets and lease liabilities based on the present value of future lease payments. On January 1, 2019, TCF recorded right-of-use assets and lease liabilities totaling $91.9 million and $112.8 million, respectively. TCF also recorded additional right-of-use assets and lease liabilities totaling $39.8 million and $41.6 million on August 1, 2019 as a result of the Merger. The impact to capital ratios as a result of increased risk-weighted assets is immaterial. The adoption of this guidance did not result in a material change to lessee expense recognition. The changes to lessor accounting, as well as changes in customer behavior driven by the adoption of these ASUs, impacts the results of TCF's leasing and equipment financing businesses, including earlier recognition of expense due to a narrower definition of initial direct costs and the timing of revenue recognition for certain leases, resulting in more revenue being deferred over the lease term.

Recently Issued but Not Yet Adopted Accounting Pronouncements

In November 2018, the Financial Accounting Standards Board (the "FASB") issued ASU No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606, which makes targeted improvements to the accounting for collaborative arrangements in response to questions raised as a result of the issuance of ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities, which provides an elective exemption to private companies from applying variable interest entities ("VIE") guidance to all entities under common control if certain criteria are met. In addition, this ASU contains an amendment applicable to all entities which amends how a decision maker or service provider determines whether its fee is a variable interest in a VIE when a related party under common control also has an interest in the VIE. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement, which eliminates, adds and modifies certain disclosure requirements for fair value measurements. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. Certain of the amendments require prospective application, while the remainder require retrospective application. Early adoption is allowed either for the entire standard or only the provisions that eliminate or modify the requirements. Management is currently evaluating which adoption method will be selected as well as the related potential impact of this guidance on our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This ASU simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Subsequent to adoption, goodwill impairment will be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance largely remains unchanged. The adoption of this ASU will be required beginning with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020 on a prospective basis. Early adoption is allowed. The adoption of this guidance will not have a material impact on our consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which changes the impairment model for most financial assets (including off-balance sheet exposure), including trade and other receivables, debt securities held to maturity, loans, net investments in leases and purchased financial assets with credit deterioration. The ASU requires the use of a current expected credit loss ("CECL") methodology to determine the allowance for credit losses for loans and debt securities held to maturity. CECL requires loss estimates for the remaining estimated life of the asset to be measured using historical loss data as well as reasonable and supportable forecasts based on current and forecasted economic conditions. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, which clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 and should be accounted for in accordance with Topic 842. In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and

Hedging, and Topic 825, Financial Instruments, which clarifies and corrects certain unintended applications of the guidance contained in each of the amended Topics. In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments - Credit Losses (Topic 326): Targeted Transition Relief, which provides an option to irrevocably elect the fair value option in Subtopic 825-10 to certain instruments within the scope of Subtopic 326-20 upon adoption of Topic 326. The adoption of these ASUs will be required on a modified retrospective basis with a cumulative effect adjustment required beginning January 1, 2020 with TCF's Quarterly Report on Form 10-Q for the quarter ending March 31, 2020. CECL represents a significant change in GAAP and is expected to result in a material impact to our consolidated financial statements and capital ratios. The impact of these ASUs will depend on the composition of TCF's portfolios, the current economic conditions, and forecasted macroeconomic conditions at the date of adoption. Additionally, industry practice and interpretation of the ASUs continues to evolve which may impact management's implementation of the standard.

TCF has established a governance structure to implement these ASUs and has developed a majority of the methodology and models to be used upon adoption. Based on parallel runs of the CECL process that TCF has performed alongside our current allowance for loan and lease losses process, we preliminarily estimated that the adoption of the standard will increase the allowance for loan and lease losses between 35% to 45% on Legacy TCF portfolios, when compared to current allowance for loan and lease loss levels. At September 30, 2019, Legacy TCF loan and lease portfolios totaled approximately $17.8 billion with a corresponding allowance for loans and lease losses of approximately $117.1 million. The largest impact is anticipated to be to our consumer segment given the longer duration of the portfolios. Management is in the process of finalizing model validations and approval of all key design decisions through its governance structure, which includes decisions about the methodology for estimating reserves for unfunded commitments and disclosures. The estimated impact of the standard depends on the composition of the portfolio, credit quality, economic conditions and forecasts at the time of adoption, as well as final decisions by management, all of which could result in a change to management’s estimate.

With the close of the Merger on August 1, 2019, management is evaluating the impact of CECL on the acquired legacy Chemical portfolio which will then be included in the combined portfolio of TCF upon adoption. The loans and leases acquired in the Merger were recorded at estimated fair value on the Merger Date, which includes an estimate of credit losses. Under current GAAP, an allowance for loan and lease losses is not recorded on these loans and leases until there is evidence of credit deterioration post acquisition. However, upon adoption of CECL an allowance for loan and lease loss will need to be recorded for the acquired loans based on the lifetime loss concept within CECL. We are in the process of developing CECL assumptions on the acquired Chemical portfolios with those used by Legacy TCF. Since these assumptions could materially impact the estimate of the allowance for loan and lease losses under CECL, we are unable to estimate the impact on the Chemical portfolio at this time.

The initial increase to TCF's allowance for loan and lease losses will be recorded as an adjustment to beginning of the year retained earnings. Post adoption, as loans and leases are added to the portfolio, we expect higher levels of allowance for loan and lease losses determined by CECL assumptions, resulting in higher levels of provision for credit losses. Management will continue to refine this process during the fourth quarter of 2019 as well as consider the impacts the Merger will have on the adoption of the standard.

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Loans and Leases

9 Months Ended

Sep. 30, 2019

Receivables [Abstract]

Loans and Leases

Loans and Leases

Loans and leases were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	10,810,534	$	6,220,632
Commercial real estate	8,876,779		2,908,313
Lease financing	2,594,373		2,530,163
Total commercial loan and lease portfolio	22,281,686		11,659,108
Consumer loan portfolio:
Residential mortgage	6,057,404		2,335,835
Consumer installment	1,562,252		2,003,572
Home equity	3,609,410		3,074,505
Total consumer loan portfolio	11,229,066		7,413,912
Total loans and leases(1)	$	33,510,752	$	19,073,020

(1) Loans and leases are reported at historical cost including net direct fees and costs associated with originating and acquiring loans and leases, lease residuals, unearned income and unamortized purchase premiums and discounts. The aggregate amount of loan and lease adjustments was a net deferred cost of $234.4 million and $1.5 million at September 30, 2019 and December 31, 2018, respectively.

Acquired Loans and Leases TCF acquired loans and leases at fair value in the Merger and in previous acquisitions completed by Legacy TCF. Certain loans acquired were classified as PCI and are accounted for under ASC 310-30, which recognizes the expected shortfall of expected future cash flows, as compared to the contractual amount due, as nonaccretable difference. Any excess of the net present value of expected future cash flows over the acquisition date fair value is recognized as the accretable yield. The accretable yield is recognized over the expected remaining life of the acquired loan. In the event an acquired loan is renewed or extended, the loan continues to be accounted for as an acquired loan in accordance with ASC 310-30.

The carrying value and changes in accretable yield of all PCI loans were as follows:

	At or For the Three Months Ended September 30,						At or For the Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Balance of PCI loans, beginning of period	$	2,273		$	7,033		$	3,816		$	11,844
Accretable Yield
Balance, beginning of period	$	401		$	439		$	961		$	1,051
Addition attributable to the Merger	39,733			—			39,733			—
Accretion recognized in interest income	(4,312		)	(38		)	(5,015		)	(188		)
Net reclassification (to) from nonaccretable difference	(517		)	—			179			370
Payments received	(824		)	26			(1,377		)	(806		)
Balance, end of period	$	34,481		$	427		$	34,481		$	427
Balance of PCI loans, end of period	$	293,713		$	4,802		$	293,713		$	4,802

Leases Effective January 1, 2019, TCF adopted ASU No. 2016-02, Leases (Topic 842) and related ASUs on a modified retrospective basis, electing the practical expedients and optional transition method. As such, the following leasing disclosures include information at or for the three and nine months ended September 30, 2019.

The components of the net investment in direct financing and sales-type leases were as follows:

(In thousands)	At September 30, 2019
Carrying amount	$	2,682,097
Unguaranteed residual assets	148,669
Net direct fees and costs and unearned income	(236,393		)
Total net investment in direct financing and sales-type leases	$	2,594,373

The carrying amount of the direct financing and sales-type leases subject to residual value guarantees was $263.3 million at September 30, 2019.

The components of total lease income were as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Interest income - loans and leases:
Interest income on net investment in direct financing and sales-type leases	$	32,832	$	98,116
Leasing revenue (noninterest income):
Lease income from operating lease payments	25,444		76,140
Profit (loss) recorded on commencement date on sales-type leases	7,983		22,289
Gains (losses) on sales of leased equipment	6,163		18,603
Leasing revenue	39,590		117,032
Total lease income	$	72,422	$	215,148

Lease financing equipment depreciation on equipment leased to others was $19.4 million and $57.8 million for the three and nine months ended September 30, 2019, respectively. The net book value of equipment leased to others and related initial direct costs under operating leases was $285.4 million at September 30, 2019.

Undiscounted future minimum lease payments receivable for direct financing and sales-type leases, and a reconciliation to the carrying amount recorded at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	51,851
2020	333,516
2021	459,359
2022	554,951
2023	563,752
Thereafter	612,063
Equipment under leases not yet commenced	47,948
Total undiscounted future minimum lease payments receivable for direct financing and sales-type leases	2,623,440
Third-party residual value guarantees	58,657
Total carrying amount of direct financing and sales-type leases	$	2,682,097

Undiscounted future minimum lease payments expected to be received for operating leases at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	20,087
2020	71,120
2021	48,885
2022	25,915
2023	9,777
Thereafter	4,717
Total undiscounted future minimum lease payments	$	180,501

Loan Sales The following table summarizes the net gains on sales of loans and leases. TCF retains servicing on a majority of loans sold. See Note 11. Loan Servicing Rights for further information.

	Three Months Ended September 30,						Nine Months Ended September 30,
(In millions)	2019			2018			2019			2018
Sale proceeds, net	$	472,800		$	410,389		$	1,066,576		$	940,134
Recorded investment in loans and leases sold, including accrued interest	458,697			393,078			1,033,961			911,218
Interest-only strips at initial value and other	(20,087		)	(8,809		)	(19,241		)	(4,016		)
Net (losses) gains on sales of loans and leases	$	(5,984	)	$	8,502		$	13,374		$	24,900

Interest-only strips related to loan sales were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Interest-only strips	$	14,078	$	16,835

TCF recorded $22 thousand and $43 thousand of impairment charges on interest-only strips during the three and nine months ended September 30, 2019, respectively, and $45 thousand and $0.7 million during the same periods in 2018.

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Loan Servicing Rights

9 Months Ended

Sep. 30, 2019

Transfers and Servicing [Abstract]

Loan Servicing Rights

Loan Servicing Rights

Information regarding LSRs was as follows:

(Dollars in thousands)	At or For the Three Months Ended September 30, 2019			At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	18		$	23
Acquired in the Merger	59,567			59,567
New servicing assets created	1,906			1,906
Impairment (charge) recovery	(4,520		)	(4,520		)
Amortization	(1,670		)	(1,675		)
Balance, end of period	$	55,301		$	55,301
Valuation allowance, end of period	$	(4,520	)	$	(4,520	)
Loans serviced for others that have servicing rights capitalized, end of period	$	6,647,153		$	6,647,153

LSRs are stratified into relatively homogeneous pools based on products with similar characteristics.

Total loan servicing, late fee and other ancillary fee income, included in servicing fee income, related to loans serviced for others that have servicing rights capitalized was $2.8 million for both the three and nine months ended September 30, 2019.

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Borrowings

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Borrowings

Borrowings

TCF Bank is a member of the FHLB, which provides short- and long-term funding collateralized by mortgage related assets to its members.

Collateralized Deposits include TCF Bank's Repurchase Investment Sweep Agreement product collateralized by mortgage-backed securities, and funds deposited by customers that are collateralized by investment securities owned by TCF Bank, as these deposits are not covered by FDIC insurance.

Short-term borrowings (borrowings with an original maturity of less than one year) were as follows:

	At September 30, 2019				At December 31, 2018
(Dollars in thousands)	Amount		Weighted-average Rate		Amount		Weighted-average Rate
FHLB advances	$	2,335,960	1.63	%	$	—	—	%
Collateralized Deposits	271,340		1.00		—		—
Total short-term borrowings	$	2,607,300	1.56		$	—	—

On August 5, 2019, TCF Financial entered into a $50.0 million unsecured 364-day revolving credit facility bearing interest at the then applicable Eurocurrency Rate plus 150 basis points, available to be used, as needed, to fund growth, common stock repurchases or other general corporate purposes. The revolving credit facility contains covenants related to certain thresholds that must be maintained related to various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on levels of indebtedness. TCF Financial had no outstanding balance under the revolving credit facility and was in compliance with all covenants at September 30, 2019.

Long-term borrowings were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
FHLB advances	$	322,674	$	1,100,000
Subordinated debt obligations	430,178		253,391
Discounted lease rentals	104,571		92,976
Capital lease obligation	3,059		3,105
Total long-term borrowings	$	860,482	$	1,449,472

FHLB Advances As a result of the Merger, TCF assumed long-term FHLB advances of $322.7 million. These acquired long-term FHLB advances have maturity dates ranging from 2020 to 2025 and carried interest rates ranging from of 1.30% to 2.72% at September 30, 2019. FHLB advances are collateralized by residential mortgage and commercial real estate loans.

Subordinated Debt Obligations As a result of the Merger, TCF assumed subordinated debt securities totaling $19.0 million. Included in the obligations assumed in the Merger were $5.6 million of obligations due in 2032 with a carrying interest rate based on the three-month LIBOR plus 3.25% and $13.4 million of obligations due in 2034 and 2035 with carrying interest rates based on the three-month LIBOR plus 1.45% to 2.85%.

On July 2, 2019, TCF Bank issued $150.0 million of fixed-to-floating rate subordinated notes (the "2029 Notes") at par. The fixed-to-floating rate subordinated notes, due July 2, 2029, bear an initial interest rate of 4.13% per annum, payable semi-annually in arrears on January 2 and July 2, commencing on January 2, 2020. The 2029 Notes are redeemable at TCF Bank's option beginning on July 2, 2024. Effective July 2, 2024, the interest rate will reset quarterly to an annual interest rate equal to the then-current three-month LIBOR rate plus 237.5 basis points, payable quarterly in arrears on January 2, April 2, July 2 and October 2, commencing on October 2, 2024. TCF Bank incurred issuance costs of $1.5 million that are amortized as interest expense over the full term of the 2029 Notes using the effective interest method.

The contractual maturities of long-term borrowings at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	11,138
2020	150,274
2021	29,508
2022	126,721
2023	5,960
Thereafter	536,881
Total long-term borrowings	$	860,482

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Fair Values Measurements

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

TCF uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Fair values are based on the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Investment securities carried at fair value, certain loans held for sale, interest-only strips, derivative instruments, forward loan sales commitments and assets and liabilities held in trust for deferred compensation plans are recorded at fair value on a recurring basis. From time to time we may be required to record at fair value other assets on a non-recurring basis, such as certain investment securities held to maturity, loans and leases, goodwill, loan servicing rights, other intangible assets, other real estate owned, repossessed and returned assets or the securitization receivable. These non-recurring fair value adjustments typically involve application of lower of cost or fair value accounting or write-downs of individual assets.

TCF groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the degree and reliability of estimates and assumptions used to determine fair value. The levels are as follows:

Level 1 Valuations that are based on prices obtained from independent pricing sources for the same instruments traded in active markets.

Level 2 Valuations that are based on prices obtained from independent pricing sources that are based on observable transactions of similar instruments, but not quoted markets.

Level 3 Valuations generated from Corporation model-based techniques that use at least one significant unobservable inputs. Such unobservable inputs reflect estimates of assumptions that market participants would use in pricing the asset or liability.

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

Investment Securities Carried at Fair Value: The fair value of investment securities carried at fair value, categorized as Level 2, is recorded using prices obtained from independent asset pricing services that are based on observable transactions, but not quoted markets. Management reviews the prices obtained from independent asset pricing services for unusual fluctuations and comparisons to current market trading activity.

Loans Held-for-Sale: TCF has elected the fair value option for residential mortgage loans held-for-sale. Accordingly, the fair values of residential mortgage loans held-for-sale are based on valuation models that use the market price for similar loans sold in the secondary market. As these prices are derived from market observable inputs, TCF categorized as Level 2.

Interest-only Strips: The fair value of interest-only strips, categorized as Level 3, represents the present value of future cash flows expected to be received by TCF on certain assets. TCF uses available market data, along with its own empirical data and discounted cash flow models, to arrive at the fair value of its interest-only strips. The present value of the estimated expected future cash flows to be received is determined by using discount, loss and prepayment rates that TCF believes are commensurate with the risks associated with the cash flows and what a market participant would use. These assumptions are inherently subject to volatility and uncertainty and, as a result, the fair value of the interest-only strips may fluctuate significantly from period to period.

Derivative Instruments:

Interest Rate Contracts: TCF executes interest rate contracts as described in Note 18. The fair value of these interest rate contracts, categorized as Level 2, is determined using a cash flow model which may consider the forward curve, the discount curve, option volatilities and credit valuation adjustments related to counterparty and/or borrower non-performance risk.

Forward Foreign Exchange Contracts: TCF's forward foreign exchange contracts are recorded at fair value using a cash flow model that includes key inputs such as foreign exchange rates and an assessment of the risk of counterparty non-performance. The risk of counterparty non-performance is based on external assessments of credit risk. The fair value of these contracts, categorized as Level 2, is based on observable transactions, but not quoted markets.

Interest Rate Lock Commitments: TCF's interest rate lock commitments are derivative instruments that are recorded at fair value based on valuation models that use the market price for similar loans sold in the secondary market. The interest rate lock commitments are adjusted for expectations of exercise and funding. As the prices are derived from market observable inputs, TCF categorized as Level 2.

Power Equity CDs: Power Equity CDs are categorized as Level 2, and determined using quoted prices of underlying stocks, along with other terms and features of the derivate instruments.

Swap Agreement: TCF's swap agreement, categorized as Level 3, is related to the sale of TCF's Visa Class B stock. The fair value of the swap agreement is based on TCF's estimated exposure related to the Visa covered litigation through a probability analysis of the funding and estimated settlement amounts.

Forward Loan Sales Commitments: TCF enters into forward loan sales commitments to sell certain mortgage loans which are recorded at fair value based on valuation models. TCF’s expectation of the amount of its interest rate lock commitments that will ultimately close is a factor in determining the position. The valuation models utilize the fair value of related mortgage loans determined using observable market data and therefore categorized as Level 2.

Assets and Liabilities Held in Trust for Deferred Compensation Plans: Assets held in trust for deferred compensation plans include investments in publicly traded securities, excluding TCF Financial common stock reported in treasury stock and other equity, and U.S. Treasury notes. The fair value of these assets, categorized as Level 1, is based on prices obtained from independent asset pricing services based on active markets. The fair value of the liabilities equals the fair value of the assets.

The balances of assets and liabilities measured at fair value on a recurring basis were as follows:

	September 30, 2019
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Investment securities carried at fair value	$	—	$	5,579,407	$	428	$	5,579,835
Loans held-for-sale	—		114,831		—		114,831
Interest-only strips	—		—		14,078		14,078
Derivative assets:(1)
Interest rate contracts	—		130,391		—		130,391
Forward foreign exchange contracts	—		1,666		—		1,666
Interest rate lock commitments	—		4,554		—		4,554
Forward loan sales commitments	—		166		—		166
Power Equity CDs	—		617		—		617
Total derivative assets	—		137,394		—		137,394
Forward loan sales commitments	—		404		—		404
Assets held in trust for deferred compensation plans	40,784		—		—		40,784
Total assets at fair value	$	40,784	$	5,832,036	$	14,506	$	5,887,326
Liabilities
Derivative liabilities:(1)
Interest rate contracts	$	—	$	101,910	$	—	$	101,910
Forward foreign exchange contracts	—		315		—		315
Interest rate lock commitments	—		113		—		113
Forward loan sales commitments	—		253		—		253
Power Equity CDs	—		617		—		617
Swap agreement	—		—		356		356
Total derivative liabilities	—		103,208		356		103,564
Forward loan sales commitments	—		284		—		284
Liabilities held in trust for deferred compensation plans	40,784		—		—		40,784
Total liabilities at fair value	$	40,784	$	103,492	$	356	$	144,632

(1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.

	December 31, 2018
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Investment securities carried at fair value	$	—	$	2,470,061	$	4	$	2,470,065
Loans held-for-sale	—		—		18,070		18,070
Interest-only strips	—		—		16,835		16,835
Derivative assets:(1)
Interest rate contracts	—		7,909		—		7,909
Forward foreign exchange contracts	—		6,689		—		6,689
Interest rate lock commitments	—		—		652		652
Total derivative assets	—		14,598		652		15,250
Forward loan sales commitments	—		—		152		152
Assets held in trust for deferred compensation plans	33,217		—		—		33,217
Total assets at fair value	$	33,217	$	2,484,659	$	35,713	$	2,553,589
Liabilities
Derivative liabilities:(1)
Interest rate contracts	$	—	$	3,732	$	—	$	3,732
Forward foreign exchange contracts	—		13		—		13
Interest rate lock commitments	—		—		28		28
Swap agreement	—		—		583		583
Total derivative liabilities	—		3,745		611		4,356
Forward loan sales commitments	—		—		178		178
Liabilities held in trust for deferred compensation plans	33,217		—		—		33,217
Total liabilities at fair value	$	33,217	$	3,745	$	789	$	37,751

(1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.

Management assesses the appropriate classification of financial assets and liabilities within the fair value hierarchy by monitoring the level of available observable market information. Changes in markets or economic conditions, as well as changes to our valuation models, may require the transfer of financial instruments from one fair value level to another. Such transfers, if any, are recorded at the fair values as of the beginning of the quarter in which the transfers occurred.

The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows:

(In thousands)	Investment securities carried at fair value			Loans held-for-sale			Interest-only strips			Interest rate lock commitments			Other derivative contracts			Forward loan sales commitments
At or For the Three Months Ended September 30, 2019
Asset (liability) balance, beginning of period	$	3		$	29,211		$	15,236		$	1,402		$	(435	)	$	(145	)
Transfers out of Level 3 (1)	—			(29,211		)	—			(1,402		)	—			145
Acquired through the Merger	450			—			—			—			—			—
Total net gains (losses) included in:
Net income	—			—			611			—			—			—
Other comprehensive income (loss)	(25		)	—			(65		)	—			—			—
Acquired	—			—			—			—			—			—
Originations	—			—			628			—			—			—
Principal paydowns / settlements	—			—			(2,332		)	—			79			—
Asset (liability) balance, end of period	$	428		$	—		$	14,078		$	—		$	(356	)	$	—
At or For the Three Months Ended September 30, 2018
Asset (liability) balance, beginning of period	$	4		$	18,554		$	19,887		$	858		$	(441	)	$	110
Total net gains (losses) included in:
Net income	—			(184		)	732			(242		)	(292		)	359
Other comprehensive income (loss)	—			—			246			—			—			—
Sales	—			(97,866		)	—			—			—			—
Originations	—			98,018			—			—			—			—
Principal paydowns / settlements	—			(3		)	(3,153		)	—			75			—
Asset (liability) balance, end of period	$	4		$	18,519		$	17,712		$	616		$	(658	)	$	469
At or For the Nine Months Ended September 30, 2019
Asset (liability) balance, beginning of period	$	4		$	18,070		$	16,835		$	624		$	(583	)	$	(26	)
Total net gains (losses) included in:
Acquired through the Merger	450			—			—			—			—			—
Net income	—			534			1,976			778			—			(119		)
Other comprehensive income (loss)	(25		)	—			246			—			—			—
Sales	—			(164,693		)	—			—			—			—
Originations	—			175,304			2,180			—			—			—
Principal paydowns / settlements	(1		)	(4		)	(7,159		)	—			227			—
Transfers out of Level 3 (1)	—			(29,211		)	—			(1,402		)	—			145
Asset (liability) balance, end of period	$	428		$	—		$	14,078		$	—		$	(356	)	$	—
At or For the Nine Months Ended September 30, 2018
Asset (liability) balance, beginning of period	$	6		$	3,356		$	21,386		$	223		$	(615	)	$	63
Total net gains (losses) included in:
Net income	—			254			1,913			393			(274		)	406
Other comprehensive income (loss)	—			—			1,015			—			—			—
Sales	—			(232,747		)	—			—			—			—
Originations	—			247,667			3,849			—			—			—
Principal paydowns / settlements	(2		)	(11		)	(10,451		)	—			231			—
Asset (liability) balance, end of period	$	4		$	18,519		$	17,712		$	616		$	(658	)	$	469

(1) Certain assets (liabilities) previously classified as Level 3 were transferred to Level 2 because current period prices are derived from Level 2 observable market data.

Assets and Liabilities Recorded at Fair Value on a Non-recurring Basis

The following is a discussion of the valuation methodologies used to record assets and liabilities at fair value on a non-recurring basis.

Loans and Leases Held-for-sale: Auto loans held-for-sale, which were previously classified as held-for-investment were transferred to held-for-sale and recorded at the lower of the loan carrying amount or fair value. The fair value is determined based on internal estimates and/or assessments.

Loans and Leases: Loans and leases for which repayment is expected to be provided solely by the value of the underlying collateral, categorized as Level 3 and recorded at fair value on a non-recurring basis, are valued based on the fair value of that collateral less estimated selling costs. The fair value of the collateral is determined based on internal estimates and/or assessments provided by third-party appraisers and the valuation relies on discount rates ranging from 10.00% to 54.00%. Effective January 1, 2019, in conjunction with the adoption of ASU No. 2016-02, Leases (Topic 842) and the related ASUs, such loans and leases include nonaccrual impaired loans and leases as well as certain delinquent nonaccrual consumer loans. Previously, TCF did not include nonaccrual impaired leases. The fair value of the collateral is determined based on internal estimates and/or assessments provided by third-party appraisers.

Other Real Estate Owned: The fair value of other real estate owned, categorized as Level 3, is based on independent appraisals, real estate brokers' price opinions or automated valuation methods, less estimated selling costs. Certain properties require assumptions that are not observable in an active market in the determination of fair value and include a discount rate of 8.00%. Assets acquired through foreclosure are initially recorded at the lower of the loan or lease carrying amount or fair value less estimated selling costs at the time of transfer to other real estate owned.

Repossessed and Returned Assets: The fair value of repossessed and returned assets, categorized as Level 2 or Level 3 depending on the underlying asset type, is based on available pricing guides, auction results or price opinions, less estimated selling costs. Unobservable inputs used to value repossessed and returned assets categorized as Level 3 include discount rates ranging from 20.00% to 30.00%. Assets acquired through repossession or returned to TCF are initially recorded at the lower of the loan or lease carrying amount or fair value less estimated selling costs at the time of transfer to repossessed and returned assets.

The balances of assets measured at fair value on a non-recurring basis were as follows. There were no liabilities measured at fair value on a non-recurring basis at September 30, 2019 and December 31, 2018.

(In thousands)	Level 1		Level 2		Level 3		Total
At September 30, 2019
Loans held-for-sale	$	—	$	136	$	1,220,621	$	1,220,757
Loans and leases	—		—		130,991		130,991
Other real estate owned	—		—		17,924		17,924
Repossessed and returned assets	—		6,841		5,762		12,603
Total non-recurring fair value measurements	$	—	$	6,977	$	1,375,298	$	1,382,275
At December 31, 2018
Loans	$	—	$	—	$	57,663	$	57,663
Other real estate owned	—		—		9,397		9,397
Repossessed and returned assets	—		4,358		5,165		9,523
Total non-recurring fair value measurements	$	—	$	4,358	$	72,225	$	76,583

Fair Value Option

TCF has elected the fair value option for residential loans held-for-sale. This election facilitates the offsetting of changes in fair value of the loans held-for-sale and the derivative financial instruments used to economically hedge them. The difference between the aggregate fair value and aggregate unpaid principal balance of these loans held-for-sale was as follows:

(In thousands)	September 30, 2019		December 31, 2018
Fair value carrying amount	$	114,831	$	18,070
Aggregate unpaid principal amount	111,540		17,517
Fair value carrying amount less aggregate unpaid principal	$	3,291	$	553

Differences between the fair value carrying amount and the aggregate unpaid principal balance include changes in fair value recorded at and subsequent to funding and gains and losses on the related loan commitment prior to funding. No loans recorded under the fair value option were delinquent or on nonaccrual status at September 30, 2019 and December 31, 2018. The net gain from initial measurement of the loans held-for-sale, any subsequent changes in fair value while the loans are outstanding and any actual adjustment to the gains realized upon sales of the loans totaled $12.4 million and $18.3 million for the three and nine months ended September 30, 2019, respectively, and $2.7 million and $6.9 million for the same periods in 2018, and are included in net (losses) gains on sales of loans and leases. These amounts exclude the impacts from the interest rate lock commitments and forward loan sales commitments which are also included in net (losses) gains on sales of loans and leases.

Disclosures about Fair Value of Financial Instruments

Management discloses the estimated fair value of financial instruments, including assets and liabilities on and off the Consolidated Statements of Financial Condition, for which it is practicable to estimate fair value. These fair value estimates were made at September 30, 2019 and December 31, 2018 based on relevant market information and information about the financial instruments. Fair value estimates are intended to represent the price at which an asset could be sold or a liability could be settled. However, given there is no active market or observable market transactions for many of TCF's financial instruments, the estimates of fair value are subjective in nature, involve uncertainties and include matters of significant judgment. Changes in assumptions could significantly affect the estimated values.

The carrying amounts and estimated fair values of TCF's financial instruments, excluding short-term financial assets and liabilities as their carrying amounts approximate fair value and excluding financial instruments recorded at fair value on a recurring basis, were as follows. This information represents only a portion of TCF's Consolidated Statements of Financial Condition not recorded in their entirety on a recurring basis and not the estimated value of TCF as a whole. Non-financial instruments such as the intangible value of TCF's branches and core deposits, leasing operations, goodwill, premises and equipment and the future revenues from TCF's customers are not reflected in this disclosure. Therefore, this information is of limited use in assessing the value of TCF.

	At September 30, 2019
	Carrying		Estimated Fair Value
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial instrument assets
FHLB and FRB stocks	$	290,238	$	—	$	290,238	$	—	$	290,238
Investment securities held-to-maturity	144,000		—		146,252		3,676		149,928
Loans and leases held-for-sale	100,216		—		84,959		18,331		103,290
Net loans(1)	30,916,379		—		—		30,897,046		30,897,046
Loan servicing rights	55,301		—		—		55,301		55,301
Securitization receivable(2)	19,624		—		—		19,355		19,355
Deferred fees on commitments to extend credit	18,485		—		18,485		—		18,485
Total financial instrument assets	$	31,544,243	$	—	$	539,934	$	30,993,709	$	31,533,643
Financial instrument liabilities
Certificates of deposits	$	8,385,972	$	—	$	8,385,496	$	—	$	8,385,496
Long-term borrowings	860,482		—		875,864		—		875,864
Deferred fees on standby letters of credit	38		—		38		—		38
Total financial instrument liabilities	$	9,246,492	$	—	$	9,261,398	$	—	$	9,261,398

	At December 31, 2018
	Carrying		Estimated Fair Value
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial instrument assets
FHLB and FRB stocks	$	91,654	$	—	$	91,654	$	—	$	91,654
Investment securities held-to-maturity	148,852		—		146,467		2,800		149,267
Loans held-for-sale	72,594		—		—		74,078		74,078
Net loans(1)	16,384,702		—		—		16,399,551		16,399,551
Securitization receivable(2)	19,432		—		—		19,025		19,025
Deferred fees on commitments to extend credit	18,555		—		18,555		—		18,555
Total financial instrument assets	$	16,735,789	$	—	$	256,676	$	16,495,454	$	16,752,130
Financial instrument liabilities
Certificates of deposits	$	4,790,680	$	—	$	4,820,442	$	—	$	4,820,442
Long-term borrowings	1,449,472		—		1,451,550		—		1,451,550
Deferred fees on standby letters of credit	77		—		77		—		77
Total financial instrument liabilities	$	6,240,229	$	—	$	6,272,069	$	—	$	6,272,069

(1) Expected credit losses are included in the estimated fair values.

(2)

Carrying amounts are included in other assets.

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Allowance for Loan and Lease Losses and Credit Quality - Summary of Defaulted TDR Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	$ 746	$ 1,258	$ 3,144	$ 8,725
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	0	87	297	4,784
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	0	87	297	4,784
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	746	1,171	2,847	3,941
Consumer | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	212	778	964	2,556
Consumer | Consumer installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	452	217	1,555	950
Consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	$ 82	$ 176	$ 328	$ 435

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Merger - Summary of Ownership (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 01, 2019	Sep. 30, 2019	Jul. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	153,500,000	153,571,381		88,198,460
Legacy TCF shareholders
Business Acquisition [Line Items]
Share price (in usd per share)			$ 21.38
Legacy TCF
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	302,065,000
Percentage Ownership	100.00%
Legacy TCF | Chemical shareholders
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	140,836,000
Percentage Ownership	46.62%
Legacy TCF | Legacy TCF shareholders
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	161,229,000
Percentage Ownership	53.38%
Chemical Financial Corporation
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	153,479,000
Percentage Ownership	100.00%
Market value	$ 6,452,268
Chemical Financial Corporation | Chemical shareholders
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	71,559,000
Percentage Ownership	46.62%
Market value	$ 3,008,330
Chemical Financial Corporation | Legacy TCF shareholders
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)	81,920,000
Percentage Ownership	53.38%
Market value	$ 3,443,938
Common Stock | Chemical Financial Corporation
Business Acquisition [Line Items]
Share price (in usd per share)	$ 42.04

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Merger - Supplemental Cash Flow Disclosures (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Business Combinations [Abstract]
Fair value of tangible assets acquired	$ 21,482,439
Goodwill, loan servicing rights and other identifiable intangible assets acquired	1,371,489
Liabilities assumed	19,835,372
Common stock and stock options issued	$ 3,018,556

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Premises and Equipment, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Depreciation and amortization	$ 14.9	$ 12.6	$ 52.1	$ 36.0

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Fair Values Measurements - Changes in Level 3 Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Transfers out of Level 3			$ 0
Interest-only Strips
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Asset (liability) balance, beginning of period	$ 15,236	$ 19,887	16,835	$ 21,386
Transfers out of Level 3	0		0
Total net gains (losses) included in:
Net income	611	732	1,976	1,913
Other comprehensive income (loss)	(65)	246	246	1,015
Acquired	0		0
Sales		0	0	0
Originations	628	0	2,180	3,849
Principal paydowns / settlements	(2,332)	(3,153)	(7,159)	(10,451)
Asset (liability) balance, end of period	14,078	17,712	14,078	17,712
Interest Rate Lock Commitments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Asset (liability) balance, beginning of period	1,402	858	624	223
Transfers out of Level 3	(1,402)		(1,402)
Total net gains (losses) included in:
Net income	0	(242)	778	393
Other comprehensive income (loss)	0	0	0	0
Acquired	0		0
Sales		0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	0	0	0	0
Asset (liability) balance, end of period	0	616	0	616
Swap agreement
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Asset (liability) balance, beginning of period	(435)	(441)	(583)	(615)
Transfers out of Level 3	0		0
Total net gains (losses) included in:
Net income	0	(292)	0	(274)
Other comprehensive income (loss)	0	0	0	0
Acquired	0		0
Sales		0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	79	75	227	231
Asset (liability) balance, end of period	(356)	(658)	(356)	(658)
Forward loan sales commitments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Asset (liability) balance, beginning of period	(145)	110	(26)	63
Transfers out of Level 3	145		145
Total net gains (losses) included in:
Net income	0	359	(119)	406
Other comprehensive income (loss)	0	0	0	0
Acquired	0		0
Sales		0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	0	0	0	0
Asset (liability) balance, end of period	0	469	0	469
Investment securities carried at fair value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Asset balance, beginning of period	3	4	4	6
Transfers out of Level 3	0
Acquired through the Merger	450		450
Total net gains (losses) included in:
Net income	0	0	0	0
Other comprehensive income (loss)	(25)	0	(25)	0
Acquired	0
Sales		0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	0	0	(1)	(2)
Asset balance, end of period	428	4	428	4
Loans Held for Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Asset balance, beginning of period	29,211	18,554	18,070	3,356
Transfers out of Level 3	(29,211)		(29,211)
Total net gains (losses) included in:
Net income	0	(184)	534	254
Other comprehensive income (loss)	0	0	0	0
Acquired	0		0
Sales		(97,866)	(164,693)	(232,747)
Originations	0	98,018	175,304	247,667
Principal paydowns / settlements	0	(3)	(4)	(11)
Asset balance, end of period	$ 0	$ 18,519	$ 0	$ 18,519

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Loan Servicing Rights - Summary of Loan Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 18	$ 23
Acquired in the Merger	59,567	59,567
New servicing assets created	1,906	1,906
Impairment (charge) recovery	(4,520)	(4,520)
Amortization	(1,670)	(1,675)
Balance, end of period	55,301	55,301
Valuation allowance, end of period	(4,520)	(4,520)
Loans serviced for others that have servicing rights capitalized, end of period	$ 6,647,153	$ 6,647,153

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Derivative Instruments - Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative instruments, gain (loss)
Notional Amount	$ 5,837,562		$ 5,837,562
Derivatives not designated as hedges
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	(16,127)	$ (4,191)	(25,499)	$ 8,731
Notional Amount	5,516,487		5,516,487		$ 1,390,750
Derivatives not designated as hedges | Interest rate contracts
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	(17,300)		(17,300)
Notional Amount	4,694,964		4,694,964		1,095,449
Derivatives not designated as hedges | Interest rate contracts | Other noninterest income
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	(19,764)	51	(21,307)	157
Derivatives not designated as hedges | Forward foreign exchange contracts
Derivative instruments, gain (loss)
Notional Amount	291,999		291,999		254,274
Derivatives not designated as hedges | Forward foreign exchange contracts | Other noninterest expense
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	3,307	(3,706)	(5,302)	8,050
Derivatives not designated as hedges | Interest rate lock commitments
Derivative instruments, gain (loss)
Notional Amount	266,949		266,949		28,007
Derivatives not designated as hedges | Interest rate lock commitments | Net (losses) gains on sales of loans and leases
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	337	(244)	1,117	798
Derivatives not designated as hedges | Forward loan sales commitments
Derivative instruments, gain (loss)
Notional Amount	218,061		218,061
Derivatives not designated as hedges | Forward loan sales commitments | Net (losses) gains on sales of loans and leases
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	(11)	0	(11)	0
Derivatives not designated as hedges | Swap agreement
Derivative instruments, gain (loss)
Notional Amount	12,644		12,644		$ 13,020
Derivatives not designated as hedges | Swap agreement | Other noninterest income
Derivative instruments, gain (loss)
Net gain (loss) of derivatives included in the Consolidated Statements of Income	$ 4	$ (292)	$ 4	$ (274)

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Federal Home Loan Bank and Federal Reserve Bank Stock - Summary of FHLB and FRB Stocks (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
FHLB stock, at cost	$ 184,483	$ 54,019
FRB stock, at cost	$ 105,755	$ 37,635

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Deposits (Tables)

9 Months Ended

Sep. 30, 2019

Banking and Thrift [Abstract]

Summary of Deposits

Deposits were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Checking:
Noninterest-bearing	$	7,959,455	$	3,921,710
Interest-bearing	6,260,136		2,452,954
Total checking	14,219,591		6,374,664
Savings	8,362,170		6,122,257
Money market	3,621,729		1,193,782
Certificates of deposit	6,949,082		3,797,241
Brokered deposits	2,133,502		1,415,742
Total deposits	$	35,286,074	$	18,903,686

Scheduled Maturities for Certificates of Deposits

Scheduled maturities for certificates of deposits, including Certificate of Deposit Account Registry Service ("CDARS") deposits, IRA deposits and other brokered funds at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	4,813,249
2020	3,138,314
2021	266,425
2022	97,139
2023	40,823
Thereafter	30,022

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Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends on common stock, per common share	$ 0.35	$ 0.295	$ 0.940434953749262	$ 0.885
Repurchases of shares of common stock (in shares)	780,716	477,804	1,453,908	3,195,126
Series B Preferred Stock
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends on preferred stock				6.45%
Series C Preferred Stock
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends on preferred stock	5.70%	5.70%	5.70%	5.70%

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Premises and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Premises and Equipment, Net

Premises and equipment, net were as follows:

(In thousands)	At September 30, 2019			At December 31, 2018
Land	$	156,380		$	144,754
Office buildings	345,663			268,495
Leasehold improvements	57,274			51,868
Furniture, equipment and computer software	450,739			404,743
Premises and equipment leased under capital leases	3,180			3,180
Subtotal	1,013,236			873,040
Less: Accumulated depreciation and amortization	(459,042		)	(445,506		)
Premises and equipment, net	$	554,194		$	427,534

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Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held-to-maturity, at fair value	$ 149,928	$ 149,267
Loans and leases held-for-sale, fair value	$ 114,831	$ 18,070
Preferred stock, par value (dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	2,000,000	30,000,000
Preferred stock, shares issued (in shares)	7,000	7,000
Preferred stock, shares outstanding (in shares)	7,000	7,000
Common stock, par value (dollars per share)	$ 1	$ 0.01
Common stock, shares authorized (in shares)	220,000,000	142,268,000
Common stock, shares issued (in shares)	153,571,381	88,198,460
Common stock, shares outstanding (in shares)	153,571,381	88,198,460
Treasury stock, shares (in shares)	0	4,909,069

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Deposits - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Bank overdrafts classified as loans	$ 18.4	$ 9.6
Certificates of deposit in excess of FDIC insurance limit	$ 3,000.0	$ 782.4

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Operating Lease Right-of-Use Assets and Liabilities - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Aug. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 114,200
Lease liabilities	135,143
Leases not yet commenced, amount	250,100
Chemical Financial Corporation
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	39,800	$ 39,800
Lease liabilities	41,600	$ 41,600
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Leases not yet commenced, amount	$ 231,700
Leases not yet commenced, term	22 years 6 months

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Operating Lease Right-of-Use Assets and Liabilities - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 395	$ 118,100
Cash paid for amounts included in the measurement of lease liabilities - operating	$ 8,807	$ 23,841

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Accumulated Other Comprehensive Income - Rollforward of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Changes in accumulated other comprehensive income by component
Balance	$ 2,710,517	$ 2,504,579	$ 2,556,260	$ 2,680,584
Total other comprehensive income (loss), net of tax	18,894	(12,448)	89,366	(46,742)
Balance	5,693,417	2,528,012	5,693,417	2,528,012
Total
Changes in accumulated other comprehensive income by component
Balance	37,334	(52,811)	(33,138)	(18,517)
Other comprehensive income (loss)	18,303	(12,575)	88,912	(47,490)
Amounts reclassified from accumulated other comprehensive income (loss)	(591)	(127)	(454)	(748)
Total other comprehensive income (loss), net of tax	18,894	(12,448)	89,366	(46,742)
Balance	56,228	(65,259)	56,228	(65,259)
Net Unrealized Gains (Losses) on Available-for-Sale Investment Securities and Interest-only Strips
Changes in accumulated other comprehensive income by component
Balance	39,971	(48,978)	(28,022)	(16,353)
Other comprehensive income (loss)	18,630	(13,570)	86,744	(46,833)
Amounts reclassified from accumulated other comprehensive income (loss)	(600)	(136)	(479)	(774)
Total other comprehensive income (loss), net of tax	19,230	(13,434)	87,223	(46,059)
Balance	59,201	(62,412)	59,201	(62,412)
Net Unrealized Gains (Losses) on Net Investment Hedges
Changes in accumulated other comprehensive income by component
Balance	10,499	9,919	14,986	4,536
Other comprehensive income (loss)	1,641	(1,904)	(2,846)	3,479
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net of tax	1,641	(1,904)	(2,846)	3,479
Balance	12,140	8,015	12,140	8,015
Foreign Currency Translation Adjustment
Changes in accumulated other comprehensive income by component
Balance	(13,229)	(13,878)	(20,211)	(6,843)
Other comprehensive income (loss)	(1,968)	2,899	5,014	(4,136)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net of tax	(1,968)	2,899	5,014	(4,136)
Balance	(15,197)	(10,979)	(15,197)	(10,979)
Recognized Postretirement Prior Service Cost
Changes in accumulated other comprehensive income by component
Balance	93	126	109	143
Other comprehensive income (loss)	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	9	9	25	26
Total other comprehensive income (loss), net of tax	(9)	(9)	(25)	(26)
Balance	$ 84	$ 117	$ 84	$ 117

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Borrowings - Schedule of Long-term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
FHLB advances	$ 322,674	$ 1,100,000
Subordinated debt obligations	430,178	253,391
Discounted lease rentals	104,571	92,976
Capital lease obligation	3,059	3,105
Long-term Debt and Lease Obligation	$ 860,482	$ 1,449,472

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Parent Company Financial Information (Tables)

9 Months Ended

Sep. 30, 2019

Condensed Financial Information Disclosure [Abstract]

Condensed Statements of Financial Condition

Condensed Statements of Financial Condition

(In thousands)	September 30, 2019		December 31, 2018
Assets
Cash and cash equivalents	$	165,457	$	91,132
Premises and equipment, net	3,883		78
Deferred tax asset	13,485		2,974
Investment in TCF Bank	5,483,484		2,426,329
Accounts receivable from TCF Bank	19,849		23,780
Other assets	25,823		1,201
Total assets	$	5,711,981	$	2,545,494
Liabilities and Equity
Long term borrowings	$	19,005	$	—
Other liabilities	22,872		7,693
Total liabilities	41,877		7,693
Equity	5,670,104		2,537,801
Total liabilities and equity	$	5,711,981	$	2,545,494

Condensed Statements of Income

Condensed Statements of Income

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands)	2019			2018		2019			2018
Interest income	$	89		$	48	$	166		160
Interest expense	199			—		199			—
Net interest income	(110		)	48		(33		)	160
Noninterest income
Dividends from TCF Bank	—			32,001		150,001			331,000
Management fees	—			—		—			—
Other	1,979			5,383		8,742			14,352
Total noninterest income	1,979			37,384		158,743			345,352
Noninterest expense
Compensation and employee benefits	4,838			4,739		12,255			15,320
Occupancy and equipment	141			82		296			220
Other	1,675			1,420		3,689			4,186
Total noninterest expense	6,654			6,241		16,240			19,726
Income (loss) before income tax benefit and equity in undistributed earnings (loss) of TCF Bank	(58,744		)	31,191		77,970			325,786
Income tax benefit	11,409			116		14,572			1,633
Income before equity in undistributed earnings (loss) of TCF Bank	(47,335		)	31,307		92,542			327,419
Equity in undistributed earnings (loss) of TCF Bank	69,483			54,892		90,527			(108,713		)
Net income	22,148			86,199		183,069			218,706
Preferred stock dividends	2,494			2,493		7,482			12,574
Impact of preferred stock redemption	—			—		—			—
Net income available to common shareholders	$	19,654		$	83,706	$	175,587		$	206,132

Condensed Statements of Cash Flows

Condensed Statements of Cash Flows

	Nine Months Ended September 30,
(In thousands)	2019			2018
Cash flows from operating activities
Net income	$	183,069		$	218,706
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in undistributed (earnings) loss of TCF Bank	(90,527		)	108,713
Share-based compensation expense	17,762			14,041
Depreciation and amortization	99			26
Provision (benefit) for deferred income taxes	14			—
Net (losses) gains on sales of assets	(8		)	(387		)
Net change in other assets	(887		)	975
Net change in other liabilities	(13,104		)	(374		)
Other, net	(2,756		)	(100		)
Net cash provided by (used in) operating activities	93,662			341,600
Cash flows from investing activities
Purchases of premises and equipment and lease equipment	(51		)	(3		)
Proceeds from sales of premises and equipment	28			17
Net cash acquired in business combination	155,154			—
Other, net	—			665
Net cash provided by (used in) investing activities	155,131			679
Cash flows from financing activities
Redemption of Series B preferred stock	—			(100,000		)
Repurchases of common stock	(58,805		)	(149,912		)
Common shares sold to TCF employee benefit plans	—			715
Dividends paid on preferred stock	(7,482		)	(9,094		)
Dividends paid on common stock	(102,368		)	(74,916		)
Payments related to tax-withholding upon conversion of share-based awards	(5,813		)	(6,563		)
Exercise of stock options	—			(998		)
Net cash provided by (used in) financing activities	(174,468		)	(340,768		)
Net change in cash and cash equivalents	74,325			1,511
Cash and cash equivalents at beginning of period	91,132			80,471
Cash and cash equivalents at end of period	$	165,457		$	81,982

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Fair Values Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Balances of Assets and Liabilities Measured at Fair Value on a Recurring and Non-recurring Basis

The balances of assets measured at fair value on a non-recurring basis were as follows. There were no liabilities measured at fair value on a non-recurring basis at September 30, 2019 and December 31, 2018.

(In thousands)	Level 1		Level 2		Level 3		Total
At September 30, 2019
Loans held-for-sale	$	—	$	136	$	1,220,621	$	1,220,757
Loans and leases	—		—		130,991		130,991
Other real estate owned	—		—		17,924		17,924
Repossessed and returned assets	—		6,841		5,762		12,603
Total non-recurring fair value measurements	$	—	$	6,977	$	1,375,298	$	1,382,275
At December 31, 2018
Loans	$	—	$	—	$	57,663	$	57,663
Other real estate owned	—		—		9,397		9,397
Repossessed and returned assets	—		4,358		5,165		9,523
Total non-recurring fair value measurements	$	—	$	4,358	$	72,225	$	76,583

The balances of assets and liabilities measured at fair value on a recurring basis were as follows:

	September 30, 2019
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Investment securities carried at fair value	$	—	$	5,579,407	$	428	$	5,579,835
Loans held-for-sale	—		114,831		—		114,831
Interest-only strips	—		—		14,078		14,078
Derivative assets:(1)
Interest rate contracts	—		130,391		—		130,391
Forward foreign exchange contracts	—		1,666		—		1,666
Interest rate lock commitments	—		4,554		—		4,554
Forward loan sales commitments	—		166		—		166
Power Equity CDs	—		617		—		617
Total derivative assets	—		137,394		—		137,394
Forward loan sales commitments	—		404		—		404
Assets held in trust for deferred compensation plans	40,784		—		—		40,784
Total assets at fair value	$	40,784	$	5,832,036	$	14,506	$	5,887,326
Liabilities
Derivative liabilities:(1)
Interest rate contracts	$	—	$	101,910	$	—	$	101,910
Forward foreign exchange contracts	—		315		—		315
Interest rate lock commitments	—		113		—		113
Forward loan sales commitments	—		253		—		253
Power Equity CDs	—		617		—		617
Swap agreement	—		—		356		356
Total derivative liabilities	—		103,208		356		103,564
Forward loan sales commitments	—		284		—		284
Liabilities held in trust for deferred compensation plans	40,784		—		—		40,784
Total liabilities at fair value	$	40,784	$	103,492	$	356	$	144,632

(1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.

	December 31, 2018
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Investment securities carried at fair value	$	—	$	2,470,061	$	4	$	2,470,065
Loans held-for-sale	—		—		18,070		18,070
Interest-only strips	—		—		16,835		16,835
Derivative assets:(1)
Interest rate contracts	—		7,909		—		7,909
Forward foreign exchange contracts	—		6,689		—		6,689
Interest rate lock commitments	—		—		652		652
Total derivative assets	—		14,598		652		15,250
Forward loan sales commitments	—		—		152		152
Assets held in trust for deferred compensation plans	33,217		—		—		33,217
Total assets at fair value	$	33,217	$	2,484,659	$	35,713	$	2,553,589
Liabilities
Derivative liabilities:(1)
Interest rate contracts	$	—	$	3,732	$	—	$	3,732
Forward foreign exchange contracts	—		13		—		13
Interest rate lock commitments	—		—		28		28
Swap agreement	—		—		583		583
Total derivative liabilities	—		3,745		611		4,356
Forward loan sales commitments	—		—		178		178
Liabilities held in trust for deferred compensation plans	33,217		—		—		33,217
Total liabilities at fair value	$	33,217	$	3,745	$	789	$	37,751

(1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.

Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis

The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows:

(In thousands)	Investment securities carried at fair value			Loans held-for-sale			Interest-only strips			Interest rate lock commitments			Other derivative contracts			Forward loan sales commitments
At or For the Three Months Ended September 30, 2019
Asset (liability) balance, beginning of period	$	3		$	29,211		$	15,236		$	1,402		$	(435	)	$	(145	)
Transfers out of Level 3 (1)	—			(29,211		)	—			(1,402		)	—			145
Acquired through the Merger	450			—			—			—			—			—
Total net gains (losses) included in:
Net income	—			—			611			—			—			—
Other comprehensive income (loss)	(25		)	—			(65		)	—			—			—
Acquired	—			—			—			—			—			—
Originations	—			—			628			—			—			—
Principal paydowns / settlements	—			—			(2,332		)	—			79			—
Asset (liability) balance, end of period	$	428		$	—		$	14,078		$	—		$	(356	)	$	—
At or For the Three Months Ended September 30, 2018
Asset (liability) balance, beginning of period	$	4		$	18,554		$	19,887		$	858		$	(441	)	$	110
Total net gains (losses) included in:
Net income	—			(184		)	732			(242		)	(292		)	359
Other comprehensive income (loss)	—			—			246			—			—			—
Sales	—			(97,866		)	—			—			—			—
Originations	—			98,018			—			—			—			—
Principal paydowns / settlements	—			(3		)	(3,153		)	—			75			—
Asset (liability) balance, end of period	$	4		$	18,519		$	17,712		$	616		$	(658	)	$	469
At or For the Nine Months Ended September 30, 2019
Asset (liability) balance, beginning of period	$	4		$	18,070		$	16,835		$	624		$	(583	)	$	(26	)
Total net gains (losses) included in:
Acquired through the Merger	450			—			—			—			—			—
Net income	—			534			1,976			778			—			(119		)
Other comprehensive income (loss)	(25		)	—			246			—			—			—
Sales	—			(164,693		)	—			—			—			—
Originations	—			175,304			2,180			—			—			—
Principal paydowns / settlements	(1		)	(4		)	(7,159		)	—			227			—
Transfers out of Level 3 (1)	—			(29,211		)	—			(1,402		)	—			145
Asset (liability) balance, end of period	$	428		$	—		$	14,078		$	—		$	(356	)	$	—
At or For the Nine Months Ended September 30, 2018
Asset (liability) balance, beginning of period	$	6		$	3,356		$	21,386		$	223		$	(615	)	$	63
Total net gains (losses) included in:
Net income	—			254			1,913			393			(274		)	406
Other comprehensive income (loss)	—			—			1,015			—			—			—
Sales	—			(232,747		)	—			—			—			—
Originations	—			247,667			3,849			—			—			—
Principal paydowns / settlements	(2		)	(11		)	(10,451		)	—			231			—
Asset (liability) balance, end of period	$	4		$	18,519		$	17,712		$	616		$	(658	)	$	469

(1)

Certain assets (liabilities) previously classified as Level 3 were transferred to Level 2 because current period prices are derived from Level 2 observable market data.

Schedule of Differences Between the Aggregate Fair Value and Aggregate Unpaid Principal Balance on Loans Held for Sale

The difference between the aggregate fair value and aggregate unpaid principal balance of these loans held-for-sale was as follows:

(In thousands)	September 30, 2019		December 31, 2018
Fair value carrying amount	$	114,831	$	18,070
Aggregate unpaid principal amount	111,540		17,517
Fair value carrying amount less aggregate unpaid principal	$	3,291	$	553

Fair Value of Assets and Liabilities, Including Hierarchy Level

The carrying amounts and estimated fair values of TCF's financial instruments, excluding short-term financial assets and liabilities as their carrying amounts approximate fair value and excluding financial instruments recorded at fair value on a recurring basis, were as follows. This information represents only a portion of TCF's Consolidated Statements of Financial Condition not recorded in their entirety on a recurring basis and not the estimated value of TCF as a whole. Non-financial instruments such as the intangible value of TCF's branches and core deposits, leasing operations, goodwill, premises and equipment and the future revenues from TCF's customers are not reflected in this disclosure. Therefore, this information is of limited use in assessing the value of TCF.

	At September 30, 2019
	Carrying		Estimated Fair Value
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial instrument assets
FHLB and FRB stocks	$	290,238	$	—	$	290,238	$	—	$	290,238
Investment securities held-to-maturity	144,000		—		146,252		3,676		149,928
Loans and leases held-for-sale	100,216		—		84,959		18,331		103,290
Net loans(1)	30,916,379		—		—		30,897,046		30,897,046
Loan servicing rights	55,301		—		—		55,301		55,301
Securitization receivable(2)	19,624		—		—		19,355		19,355
Deferred fees on commitments to extend credit	18,485		—		18,485		—		18,485
Total financial instrument assets	$	31,544,243	$	—	$	539,934	$	30,993,709	$	31,533,643
Financial instrument liabilities
Certificates of deposits	$	8,385,972	$	—	$	8,385,496	$	—	$	8,385,496
Long-term borrowings	860,482		—		875,864		—		875,864
Deferred fees on standby letters of credit	38		—		38		—		38
Total financial instrument liabilities	$	9,246,492	$	—	$	9,261,398	$	—	$	9,261,398

	At December 31, 2018
	Carrying		Estimated Fair Value
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial instrument assets
FHLB and FRB stocks	$	91,654	$	—	$	91,654	$	—	$	91,654
Investment securities held-to-maturity	148,852		—		146,467		2,800		149,267
Loans held-for-sale	72,594		—		—		74,078		74,078
Net loans(1)	16,384,702		—		—		16,399,551		16,399,551
Securitization receivable(2)	19,432		—		—		19,025		19,025
Deferred fees on commitments to extend credit	18,555		—		18,555		—		18,555
Total financial instrument assets	$	16,735,789	$	—	$	256,676	$	16,495,454	$	16,752,130
Financial instrument liabilities
Certificates of deposits	$	4,790,680	$	—	$	4,820,442	$	—	$	4,820,442
Long-term borrowings	1,449,472		—		1,451,550		—		1,451,550
Deferred fees on standby letters of credit	77		—		77		—		77
Total financial instrument liabilities	$	6,240,229	$	—	$	6,272,069	$	—	$	6,272,069

(1) Expected credit losses are included in the estimated fair values.

(2)

Carrying amounts are included in other assets.

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Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Common Share

The computations of basic and diluted earnings per common share and the anti-dilutive shares outstanding not included in the computation of diluted earnings per share were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollars in thousands, except per share data)	2019		2018		2019		2018
Basic earnings per common share
Net income attributable to TCF Financial Corporation	$	22,148	$	86,196	$	183,069	$	218,706
Preferred stock dividends	2,494		2,494		7,481		9,094
Impact of preferred stock redemption(1)	—		—		—		3,481
Net income available to common shareholders	19,654		83,702		175,588		206,131
Less: Earnings allocated to participating securities	—		13		19		30
Earnings allocated to common stock	$	19,654	$	83,689	$	175,569	$	206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation	128,575,171		83,762,625		97,876,262		84,522,519
Basic earnings per common share	$	0.15	$	1.00	$	1.79	$	2.44
Diluted earnings per common share
Earnings allocated to common stock	$	19,654	$	83,689	$	175,569	$	206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation	128,575,171		83,762,625		97,876,262		84,522,519
Net dilutive effect of:
Non-participating restricted stock	73,698		—		139,795		—
Stock options	105,719		—		39,222		1,670
Warrants	—		45,438		—		266,935
Weighted-average common shares outstanding used in diluted earnings per common share calculation	128,754,588		83,808,063		98,055,279		84,791,124
Diluted earnings per common share	$	0.15	$	1.00	$	1.79	$	2.43
Anti-dilutive shares outstanding not included in the computation of diluted earnings per common share
Non-participating restricted stock	1,369,025		1,058,202		1,369,025		1,058,202

(1)

Represents the amount of deferred stock issuance costs originally recorded in preferred stock that were reclassified to retained earnings.

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Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 4.8	$ 3.5	$ 9.5	$ 13.1
Tax benefit from share-based compensation	0.7	$ 0.3	$ 2.0	$ 2.4
Weighted-average remaining contractual term, outstanding options			4 years 3 months 10 days
Weighted-average remaining contractual term, exercisable options			3 years 8 months 12 days
Outstanding options, intrinsic value	5.8		$ 5.8
Exercisable options, intrinsic value	$ 5.3		$ 5.3
Share price (in usd per share)	$ 38.07		$ 38.07
Unrecognized compensation costs, options	$ 0.7		$ 0.7
Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for plan (in shares)	2,270,795		2,270,795
2019 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for plan (in shares)	1,914,083		1,914,083
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	0		0
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	1,494,326		1,494,326		406,575
Unrecognized compensation costs	$ 45.8		$ 45.8
Unrecognized compensation cost, recognition period			2 years 4 months 24 days
Restricted Stock Awards (RSAs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	929,096		929,096		2,289,446
Unrecognized compensation costs	$ 22.5		$ 22.5
Unrecognized compensation cost, recognition period			2 years 6 months
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, recognition period			1 year 10 months 17 days

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Earnings Per Common Share - Calculation of EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic Earnings Per Common Share:
Net income attributable to TCF Financial Corporation	$ 22,148	$ 86,196	$ 183,069	$ 218,706
Preferred stock dividends	2,494	2,494	7,481	9,094
Impact of preferred stock redemption	0	0	0	3,481
Net income available to common stockholders	19,654	83,702	175,588	206,131
Less: Earnings allocated to participating securities	0	13	19	30
Earnings allocated to common stock	$ 19,654	$ 83,689	$ 175,569	$ 206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation (in shares)	128,575,171	83,762,625	97,876,262	84,522,519
Basic earnings per common share (in usd per share)	$ 0.15	$ 1.00	$ 1.79	$ 2.44
Diluted Earnings Per Common Share:
Earnings allocated to common stock	$ 19,654	$ 83,689	$ 175,569	$ 206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation (in shares)	128,575,171	83,762,625	97,876,262	84,522,519
Net dilutive effect of:
Non-participating restricted stock (in shares)	73,698	0	139,795	0
Stock options (in shares)	105,719	0	39,222	1,670
Warrants (in shares)	0	45,438	0	266,935
Weighted-average common shares outstanding used in diluted earnings per common share calculation (in shares)	128,754,588	83,808,063	98,055,279	84,791,124
Diluted earnings per common share (in usd per share)	$ 0.15	$ 1.00	$ 1.79	$ 2.43
Anti-dilutive shares outstanding not included in the computation of diluted earnings per share:
Non-participating restricted stock (in shares)	1,369,025	1,058,202	1,369,025	1,058,202

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Allowance for Loan and Lease Losses and Credit Quality - Accruing and Non-accrual Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due
Current	$ 33,133,196	$ 18,868,291
30-89 Days Delinquent and Accruing	166,088	91,367
90 Days or More Delinquent and Accruing	29,660	7,444
Total Accruing	33,328,944	18,967,102
Nonaccrual	181,808	105,918
Total	33,510,752	19,073,020
Portfolios acquired with deteriorated credit quality
Financing Receivable, Recorded Investment, Past Due
Current	261,082	3,639
30-89 Days Delinquent and Accruing	16,578	0
90 Days or More Delinquent and Accruing	16,052	178
Total Accruing	293,712	3,817
Nonaccrual	0	0
Total	293,712	3,817
Consumer
Financing Receivable, Recorded Investment, Past Due
Total	11,229,066	7,413,912
Consumer | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	11,027,919	7,285,705
30-89 Days Delinquent and Accruing	31,769	56,237
90 Days or More Delinquent and Accruing	892	4,624
Total Accruing	11,060,580	7,346,566
Nonaccrual	88,748	67,346
Total	11,149,328	7,413,912
Consumer | Residential mortgage
Financing Receivable, Recorded Investment, Past Due
Total	6,057,404	2,335,835
Consumer | Residential mortgage | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	5,919,947	2,291,435
30-89 Days Delinquent and Accruing	14,533	10,014
90 Days or More Delinquent and Accruing	886	1,275
Total Accruing	5,935,366	2,302,724
Nonaccrual	48,816	33,111
Total	5,984,182	2,335,835
Consumer | Consumer installment
Financing Receivable, Recorded Investment, Past Due
Total	1,562,252	2,003,572
Consumer | Consumer installment | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	1,557,320	1,951,302
30-89 Days Delinquent and Accruing	3,667	40,340
90 Days or More Delinquent and Accruing	6	3,349
Total Accruing	1,560,993	1,994,991
Nonaccrual	636	8,581
Total	1,561,629	2,003,572
Consumer | Home equity
Financing Receivable, Recorded Investment, Past Due
Total	3,609,410	3,074,505
Consumer | Home equity | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	3,550,652	3,042,968
30-89 Days Delinquent and Accruing	13,569	5,883
90 Days or More Delinquent and Accruing	0	0
Total Accruing	3,564,221	3,048,851
Nonaccrual	39,296	25,654
Total	3,603,517	3,074,505
Commercial
Financing Receivable, Recorded Investment, Past Due
Total	22,281,686	11,659,108
Commercial | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	21,844,195	11,578,947
30-89 Days Delinquent and Accruing	117,741	35,130
90 Days or More Delinquent and Accruing	12,716	2,642
Total Accruing	21,974,652	11,616,719
Nonaccrual	93,060	38,572
Total	22,067,712	11,655,291
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due
Total	10,810,534	6,220,632
Commercial | Commercial and industrial | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	10,615,519	6,176,341
30-89 Days Delinquent and Accruing	49,595	13,653
90 Days or More Delinquent and Accruing	2,241	760
Total Accruing	10,667,355	6,190,754
Nonaccrual	55,039	26,061
Total	10,722,394	6,216,815
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due
Total	8,876,779	2,908,313
Commercial | Commercial real estate | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	8,677,350	2,903,795
30-89 Days Delinquent and Accruing	39,023	0
90 Days or More Delinquent and Accruing	8,054	0
Total Accruing	8,724,427	2,903,795
Nonaccrual	26,518	4,518
Total	8,750,945	2,908,313
Commercial | Lease financing
Financing Receivable, Recorded Investment, Past Due
Total	2,594,373	2,530,163
Commercial | Lease financing | Financial Asset Originated
Financing Receivable, Recorded Investment, Past Due
Current	2,551,326	2,498,811
30-89 Days Delinquent and Accruing	29,123	21,477
90 Days or More Delinquent and Accruing	2,421	1,882
Total Accruing	2,582,870	2,522,170
Nonaccrual	11,503	7,993
Total	$ 2,594,373	$ 2,530,163

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Loans and Leases - Summary of Acquired PCI Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
PCI Balance	$ 293,713	$ 4,802	$ 293,713	$ 4,802	$ 2,273	$ 3,816	$ 7,033	$ 11,844
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	401	439	961	1,051
Addition attributable to the Merger	39,733	0	39,733	0
Accretion recognized in interest income	(4,312)	(38)	(5,015)	(188)
Net reclassification (to) from nonaccretable difference	(517)	0	179	370
Payments received	(824)	26	(1,377)	(806)
Balance, end of period	$ 34,481	$ 427	$ 34,481	$ 427

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Investment Securities - Narrative (Details) $ in Millions	Sep. 30, 2019 USD ($) investment	Dec. 31, 2018 USD ($)
Debt Securities, Available-for-sale [Line Items]
Investment securities in unrealized loss position | investment	1,056
Collateral Pledged | Total mortgage-backed debt securities
Debt Securities, Available-for-sale [Line Items]
Restricted investments | $	$ 761.4	$ 1.6

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Commitments, Contingent Liabilities and Guarantees - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Commitments to lend additional funds	$ 0.5	$ 0.6
Representations and Warranties
Loss Contingencies [Line Items]
Accrued liability	4.0	$ 1.3
Certain Loans | Performance Guarantee
Loss Contingencies [Line Items]
Maximum potential amount of undiscounted future payments	0.7
Recourse liability	0.1
SBA Guaranteed Loans | Performance Guarantee
Loss Contingencies [Line Items]
Maximum potential amount of undiscounted future payments	17.6
Recourse liability	$ 0.9

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Loans and Leases - Loan Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Receivables [Abstract]
Sale proceeds, net	$ 472,800	$ 410,389	$ 1,066,576	$ 940,134
Recorded investment in loans and leases sold, including accrued interest	458,697	393,078	1,033,961	911,218
Interest-only strips at initial value and other	(20,087)	(8,809)	(19,241)	(4,016)
Net (losses) gains on sales of loans and leases	$ (5,984)	$ 8,502	$ 13,374	$ 24,900

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Federal Home Loan Bank and Federal Reserve Bank Stock

9 Months Ended

Sep. 30, 2019

Federal Home Loan Banks [Abstract]

Federal Home Loan Bank and Federal Reserve Bank Stocks

Federal Home Loan Bank and Federal Reserve Bank Stocks

Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stocks were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
FHLB stock, at cost	$	184,483	$	54,019
FRB stock, at cost	105,755		37,635

The investments in FHLB stock are required investments related to TCF's membership and borrowings in the FHLB of Des Moines, and additional current borrowings from the FHLB of Indianapolis and Cincinnati. TCF's investments in the FHLB of Des Moines could be adversely impacted by the financial operations of the Federal Home Loan Banks and actions of their regulator, the Federal Housing Finance Agency. The amount of FRB stock that TCF Bank is required to hold is based on TCF Bank's capital structure. TCF periodically evaluates investments for other than temporary impairment. There was no impairment of these investments at September 30, 2019 and December 31, 2018.

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Premises and Equipment, Net

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Premises and Equipment, Net

Premises and Equipment, Net

Premises and equipment, net were as follows:

(In thousands)	At September 30, 2019			At December 31, 2018
Land	$	156,380		$	144,754
Office buildings	345,663			268,495
Leasehold improvements	57,274			51,868
Furniture, equipment and computer software	450,739			404,743
Premises and equipment leased under capital leases	3,180			3,180
Subtotal	1,013,236			873,040
Less: Accumulated depreciation and amortization	(459,042		)	(445,506		)
Premises and equipment, net	$	554,194		$	427,534

Depreciation and amortization expense related to premises and equipment was $14.9 million and $52.1 million for the three and nine months ended September 30, 2019, respectively, and $12.6 million and $36.0 million for the same periods in 2018.

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Commitments, Contingent Liabilities and Guarantees

9 Months Ended

Sep. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments, Contingent Liabilities and Guarantees

Commitments, Contingent Liabilities and Guarantees

Financial Instruments with Off-Balance Sheet Risk In the normal course of business, TCF enters into financial instruments with off-balance sheet risk, primarily to meet the financing needs of its customers. These financial instruments, which are issued or held for purposes other than trading, involve elements of credit and interest-rate risk in excess of the amounts recognized in the Consolidated Statements of Financial Condition.

TCF's exposure to credit loss, in the event of non-performance by the counterparty to the financial instrument is represented by the contractual amount of the commitments. TCF uses the same credit policies in making these commitments as it does for making direct loans. TCF evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained is based on a credit evaluation of the customer.

Financial instruments with off-balance sheet risk were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Commitments to extend credit:
Commercial	$	5,269,843	$	1,280,707
Consumer	2,266,913		1,627,960
Total commitments to extend credit	7,536,756		2,908,667
Standby letters of credit and guarantees on industrial revenue bonds	125,438		20,662
Total	$	7,662,194	$	2,929,329

Commitments to Extend Credit Commitments to extend credit are agreements to lend provided there is no violation of any condition in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a certain amount of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Collateral to secure any funding of these commitments predominantly consists of residential and commercial real estate mortgages.

Standby Letters of Credit and Guarantees on Industrial Revenue Bonds Standby letters of credit and guarantees on industrial revenue bonds are conditional commitments issued by TCF guaranteeing the performance of a customer to a third party. These conditional commitments expire in various years through 2039. The majority of these standby letters of credit are collateralized. Collateral held consists primarily of commercial real estate mortgages. Since the conditions under which TCF is required to fund these commitments may not materialize, the cash requirements are expected to be less than the total outstanding commitments.

Contingencies and Guarantees TCF has originated and sold certain loans, and additionally acquired the potential liability for those historical originated and sold loans by merged or acquired entities, for which the buyer has limited recourse to us in the event the loans do not perform as specified in the agreements. The outstanding balance and the maximum potential amount of undiscounted future payments that TCF could be required to make in the event of nonperformance by the borrower totaled $0.7 million at September 30, 2019. In the event of nonperformance, TCF has rights to the underlying collateral securing the loans. At September 30, 2019, TCF had recorded a liability of $0.1 million, in connection with the recourse agreements, in other liabilities.

In addition, TCF acquired certain Small Business Administration ("SBA") guaranteed loans in which the guaranteed portion had been sold to a third party investor. In the event these loans default and the SBA guaranty is no longer intact (i.e. an issue found to have occurred during the origination or the liquidation of the loans) TCF would be liable to make the loan whole to the third party investor. The maximum potential amount of undiscounted future payments that TCF could be required to make in the event of default by the borrower was $17.6 million at September 30, 2019. In the event of default, TCF has rights to the underlying collateral securing the loans. At September 30, 2019, TCF had recorded a liability of $0.9 million, in other liabilities.

Representations, Warranties and Contractual Liabilities In connection with TCF's residential mortgage loan sales, and the historical sales of merged or acquired entities, TCF makes certain representations and warranties that the loans meet certain criteria, such as collateral type, underwriting standards and the manner in which the loans will be serviced. TCF may be required to repurchase individual loans and/or indemnify the purchaser against losses if the loan fails to meet established criteria. In addition, some agreements contain a requirement to repurchase loans as a result of early payoffs by the borrower, early payment default of the borrower or the failure to obtain valid title. At September 30, 2019 and December 31, 2018 the liability recorded in connection with these representations and warranties was $4.0 million and $1.3 million, respectively, included in other liabilities.

Litigation Contingencies From time to time, TCF is a party to legal proceedings arising out of its lending, leasing and deposit operations, including foreclosure proceedings and other collection actions as part of its lending and leasing collections activities. TCF may also be subject to regulatory examinations and enforcement actions brought by federal regulators, including the SEC, the Federal Reserve, the OCC and the Consumer Financial Protection Bureau which may impose sanctions on TCF for failures related to regulatory compliance. From time to time borrowers and other customers, and employees and former employees have also brought actions against TCF, in some cases claiming substantial damages. TCF and other financial services companies are subject to the risk of class action litigation. Litigation is often unpredictable and the actual results of litigation cannot be determined and therefore the ultimate resolution of a matter and the possible range of loss associated with certain potential outcomes cannot be established. Based on our current understanding of TCF's pending legal proceedings, management does not believe that judgments or settlements arising from pending or threatened legal matters, individually or in the aggregate, would have a material adverse effect on the consolidated financial position, operating results or cash flows of TCF.

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Retirement Plans

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Retirement Plans

Retirement Plans

TCF maintains four Legacy TCF employee benefit plans: (i) the TCF 401K Plan (the "TCF 401K"), (ii) the TCF 401k Supplemental Plan (the "Legacy TCF Supplemental Plan"), (iii) the TCF Cash Balance Pension Plan (the "Legacy TCF Pension Plan"), a defined benefit pension plan, and (iv) the TCF Postretirement Plan (the "Legacy TCF Postretirement Plan"), a postretirement benefit plan, each of which were discussed in Legacy TCF's Annual Report on Form 10-K for the year ended December 31, 2018.

TCF also maintains the Chemical employee benefit plans that existed before the Merger: (i) the Chemical Financial Corporation Nonqualified Postretirement Benefit Plan (the "Chemical Postretirement Benefit Plan"), a postretirement benefit plan, and (ii) the Chemical Financial Corporation 401k Savings Plan (the "Chemical 401k").

In addition, Chemical has a pension plan, the Chemical Pension Plan, which is a qualified defined-benefit, noncontributory pension plan. However, the termination of the Chemical Pension Plan was approved effective August 31, 2019. The discount rate was adjusted to 3.48% based on the remeasurement of the Chemical Pension Plan required due to the Merger and the termination. At the time of the Merger, as a result the pending termination, TCF recognized a prepaid asset representing the funded status of the Chemical Pension Plan, net of estimated settlement costs, and the balance previously in accumulated other comprehensive income was eliminated. The purchase accounting adjustment, as a result of the Merger, was reported in goodwill. The Chemical Pension Plan was fully funded as of September 30, 2019.

The Chemical Postretirement Benefit Plan provides medical and dental benefits, upon retirement, to a limited number of active and retired employees. The majority of the retirees are required to make contributions toward the cost of their benefits based on their years of credited service and age at retirement. Covered employees include those who were at least age 50 as of January 1, 2012, that retire at age 60 or older, have at least twenty-five years of service with Chemical and are participants in the active employee group health insurance plan. Eligible employees may also cover their spouse until age 65 as long as the spouse is not offered health insurance coverage through his or her employer. Employees and their spouses eligible to participate in the Chemical Postretirement Benefit Plan are required to make contributions toward the cost of their benefits upon retirement, with the contribution levels designed to cover the projected overall cost of these benefits over the long-term. Retiree contributions are generally adjusted annually. The accounting for these postretirement benefits anticipates changes in future cost-sharing features such as retiree contributions, deductibles, copayments and coinsurance. The benefits can be amended, modified or terminated by us at any time.

The Chemical 401k is available to all former Chemical employees that continue to be employed following the Merger Date, and provides tax deferred salary deductions and alternative investment options. We provide a safe harbor matching contribution of the participants elective deferrals up to a maximum of 6.0% of eligible compensation up to the maximum amount allowed under the Internal Revenue Code. The Chemical 401k provides the option to invest in TCF Financial common stock.

The Board of Directors approved the termination of the Legacy TCF Pension Plan effective November 1, 2019. The Legacy TCF Pension Plan was fully funded as of September 30, 2019. The weighted-average interest crediting rate was 2.24% as of September 30, 2019. TCF does not consolidate the assets and liabilities associated with the Legacy TCF Pension Plan.

The net periodic benefit plan (income) cost for defined benefit pension plans and postretirement benefit plans were as follows:

	Defined Benefit Pension Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Interest cost	$	1,046		$	246		$	1,574		$	738
Service cost	—			—			—			—
Contractual termination cost	—			—			—			—
Return on plan assets	(949		)	(133		)	(1,223		)	(397		)
Amortization of prior service credit	—			—			—			—
Amortization of unrecognized net loss	—			—			—			—
Recognized actuarial (gain) loss	—			—			—			—
Net periodic benefit plan (income) cost	$	97		$	113		$	351		$	341

	Postretirement Benefit Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Interest cost	$	41		$	28		$	101		$	83
Service cost	—			—			—			—
Recognized actuarial (gain) loss	—			—			—			—
Amortization of prior service cost	(11		)	(12		)	(35		)	(35		)
Amortization of unrecognized net loss	—			—			—			—
Net periodic benefit plan (income) cost	$	30		$	16		$	66		$	48

TCF made no cash contributions to the defined benefit pension plans during the three and nine months ended September 30, 2019 and 2018. TCF contributed $0.1 million and $0.3 million to the Legacy TCF Postretirement Plan during the three and nine months ended September 30, 2019, and $0.1 million and $0.3 million during the same periods in 2018.

The TCF match under both the Legacy TCF 401k and the Chemical 401k was $4.3 million and $11.4 million for the three and nine months ended September 30, 2019, and $2.5 million and $9.7 million during the same periods in 2018.

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Federal Home Loan Bank and Federal Reserve Bank Stock (Tables)

9 Months Ended

Sep. 30, 2019

Federal Home Loan Banks [Abstract]

Summary of Federal Home Loan Bank and Federal Reserve Bank Stocks

Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stocks were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
FHLB stock, at cost	$	184,483	$	54,019
FRB stock, at cost	105,755		37,635

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Parent Company Financial Information - Condensed Statements Of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Income Statements, Captions [Line Items]
Interest income	$ 459,808	$ 291,707	$ 1,077,483	$ 861,420
Interest expense	88,015	38,205	197,204	106,078
Net interest income	371,793	253,502	880,279	755,342
Noninterest income
Total noninterest income	94,258	112,064	307,480	330,529
Noninterest expense
Compensation and employee benefits	155,745	124,996	395,953	372,174
Occupancy and equipment	49,229	42,337	132,789	123,562
Other	87,776	55,685	194,781	201,308
Total noninterest expense	425,620	246,423	915,544	764,442
Income before income tax expense	13,243	116,873	221,336	293,555
Income tax benefit	11,735	(28,034)	(28,866)	(66,083)
Preferred stock dividends	2,494	2,494	7,481	9,094
Impact of preferred stock redemption	0	0	0	3,481
Net income available to common shareholders	19,654	83,702	175,588	206,131
TCF
Condensed Income Statements, Captions [Line Items]
Interest income	89	48	166	160
Interest expense	199	0	199	0
Net interest income	(110)	48	(33)	160
Noninterest income
Dividends from TCF Bank	0	32,001	150,001	331,000
Management fees	0	0	0	0
Other	1,979	5,383	8,742	14,352
Total noninterest income	1,979	37,384	158,743	345,352
Noninterest expense
Compensation and employee benefits	4,838	4,739	12,255	15,320
Occupancy and equipment	141	82	296	220
Other	1,675	1,420	3,689	4,186
Total noninterest expense	6,654	6,241	16,240	19,726
Income before income tax expense	(58,744)	31,191	77,970	325,786
Income tax benefit	11,409	116	14,572	1,633
Income before equity in undistributed earnings (loss) of TCF Bank	(47,335)	31,307	92,542	327,419
Equity in undistributed earnings (loss) of TCF Bank	69,483	54,892	90,527	(108,713)
Net income	22,148	86,199	183,069	218,706
Preferred stock dividends	2,494	2,493	7,482	12,574
Impact of preferred stock redemption	0	0	0	0
Net income available to common shareholders	$ 19,654	$ 83,706	$ 175,587	$ 206,132

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Stock Based Compensation

9 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Stock Based Compensation

Stock Based Compensation

Before the Merger, Chemical and Legacy TCF granted share-based awards under their respective share-based compensation plans, including the Chemical Stock Incentive Plan of 2019 (the "Stock Incentive Plan of 2019”") and the TCF Financial 2015 Omnibus Incentive Plan (the "Legacy TCF Omnibus Incentive Plan"). At September 30, 2019, there were 2,270,795 shares reserved for issuance under the Legacy TCF Omnibus Incentive Plan and there were 1,914,083 shares reserved for issuance under the Stock Incentive Plan of 2019.

In connection with the Merger, each equity award granted under Legacy TCF’s equity plans, including the Legacy Omnibus Incentive Plan, was legally assumed by the combined company and adjusted so that its holder is entitled to receive a number of shares of TCF Financial's common stock equal to the product of (a) the number of shares of Legacy TCF common stock subject to such award multiplied by (b) the Exchange Ratio and (c) rounded, as applicable, to the nearest whole share, and otherwise subject to the same terms and conditions (including, without limitation, with respect to vesting conditions (taking into account any vesting that occurred at the Merger Date) and cash dividend equivalent rights). For any Legacy TCF equity awards that were subject to performance-based vesting at multiple achievement levels, the number of shares of Legacy TCF common stock underlying such award was calculated and fixed as of the Merger Date assuming achievement of the applicable performance conditions at the greater of target level performance or the actual level of achievement of Legacy TCF’s performance results through the latest practicable date before the Merger Date, and such awards converted into service-based vesting awards with the applicable vesting date to be the last day of the original performance period. For purposes of Legacy TCF equity awards for which performance was achievable at a single level, the performance condition was deemed satisfied as of the Merger Date.

In connection with the Merger, all outstanding stock options, performance-based restricted stock units and time-vesting restricted stock units of Chemical, which we refer to as the Chemical equity awards, which were outstanding immediately before the Merger Date continue to be awards in respect of TCF Financial common stock following the Merger, subject to the same terms and conditions that were applicable to such awards before the Merger Date, except with respect to performance-based restricted stock units. Because the Merger constituted a change in control for purposes of the Chemical equity awards, the performance-based restricted stock units for which performance results had not been measured were measured as of the latest practicable date before the Merger Date and the number of performance-based restricted stock units was fixed at the greater of the target (100%) performance level or actual performance, which we refer to as the “Chemical Earned Awards,” and such Chemical Earned Awards will continue to vest based on the executive’s continued service through the end of the applicable performance period.

The fair value of share-based awards is recognized as compensation expense over the requisite service or performance period. Compensation expense for share-based awards was $4.8 million and $9.5 million for the three and nine months ended September 30, 2019, respectively, and $3.5 million and $13.1 million for the same periods in 2018. The excess tax benefit realized from share-based compensation transactions during the three and nine months ended September 30, 2019 was a benefit of $0.7 million and $2.0 million, respectively, and $0.3 million and $2.4 million for the same periods in 2018.

Restricted Stock Units

We can grant performance-based restricted stock units ("PRSUs") and time-based restricted stock units ("TRSUs") (collectively referred to as "RSUs") under the Stock Incentive Plan of 2019 and the Legacy TCF Omnibus Incentive Plan; provided, that, RSUs granted under the Legacy TCF Omnibus Incentive Plan may only be granted to former employees of Legacy TCF. At September 30, 2019, there were no PRSUs outstanding dependent on achieving certain performance target levels and the grantee completing the requisite service period. The TRSUs vest upon satisfaction of a service condition. Upon achievement of the performance target level and/or satisfaction of a service condition, as applicable, the RSUs are converted into shares of TCF Financial's common stock on a one-to-one basis.

A summary of the activity for RSUs at and for the nine months ended September 30, 2019 is presented below:

	Number of Units		Weighted-average Grant Date Fair Value Per Unit
Outstanding at December 31, 2018	406,575		$	17.33
Outstanding at December 31, 2018 as adjusted for conversion	206,580		34.11
Granted	533,267		41.51
Converted in the Merger(1)	55,022		42.06
Acquired in the Merger	824,757		47.71
Forfeited/canceled	(20,648	)	41.64
Vested	(104,652	)	28.85
Outstanding at September 30, 2019	1,494,326		$	38.46

(1) In connection with the Merger, certain Legacy TCF PRSUs were converted at their maximum payout into 55,022 TRSUs.

Unrecognized compensation expense related to RSUs totaled $45.8 million and is expected to be recognized over the remaining weighted-average period of 2.4 years at September 30, 2019.

Restricted Stock Awards

TCF's restricted stock award transactions were as follows:

	Number of Awards		Weighted-Average Grant Date Fair Value Per Award
Outstanding at December 31, 2018	2,289,446		$	16.70
Outstanding at December 31, 2018 as adjusted for conversion	1,163,232		32.87
Granted	269,915		40.82
Forfeited/canceled	(135,760	)	34.15
Vested	(368,291	)	31.07
Outstanding at September 30, 2019	929,096		$	40.47

At September 30, 2019, there were no shares of performance-based restricted stock awards outstanding. Unrecognized stock compensation expense for restricted stock awards was $22.5 million with a weighted-average remaining amortization period of 2.5 years at September 30, 2019.

Stock Options

A summary of activity for TCF's stock options at and for the nine months ended September 30, 2019 is presented below:

	Non-Vested Stock Options Outstanding				Stock Options Outstanding
	Number of Options		Weighted-average Exercise Price		Number of Options		Weighted- average Exercise Price
Outstanding at December 31, 2018	—		$	—	—		$	—
Acquired(1)	127,906		39.38		520,379		29.48
Forfeited/canceled	(3,094	)	32.81		—		—
Expired	—		—		(756	)	32.81
Vested	(1,144	)	46.95		1,144		46.95
Outstanding at September 30, 2019	123,668		$	39.47	520,767		$	29.51
Exercisable/vested at September 30, 2019					520,767		$	29.51

(1) Options acquired in the Merger expire ten years from the date of grant and vest ratably over a five-year period.

The weighted-average remaining contractual term was 4.28 years for all outstanding stock options and 3.7 years for exercisable stock options at September 30, 2019. The intrinsic value of all outstanding in-the-money stock options and exercisable in-the-money stock options was $5.8 million and $5.3 million, respectively, at September 30, 2019. The aggregate intrinsic values of outstanding and exercisable options at September 30, 2019 were calculated based on the closing market price of TCF Financial's common stock on September 30, 2019 of $38.07 per share less the

exercise price. Options with intrinsic values less than zero, or "out-of-the-money" options, are not included in the aggregate intrinsic value reported.

No cash was received from option exercises during the nine months ended September 30, 2019 and for the same period in 2018.

At September 30, 2019, unrecognized compensation expense related to stock options totaled $0.7 million and is expected to be recognized over a remaining weighted average period of 1.88 years.

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Investments in Qualified Affordable Housing Projects, Federal Historical Projects and New Market Tax Credits

9 Months Ended

Sep. 30, 2019

Schedule of Investments [Abstract]

Investments in Qualified Affordable Housing Projects, Federal Historical Projects and New Market Tax Credits

Investments in Qualified Affordable Housing Projects, Federal Historical Projects and New Market Tax Credits

TCF invests in qualified affordable housing projects, federal historical projects, and new market tax credits for the purposes of community reinvestment and to obtain tax credits. Return on TCF's investment in these projects comes in the form of pass through tax credits and tax losses. The carrying value of the investments is included in other assets. TCF primarily utilizes the proportional amortization method to account for investments in qualified affordable housing projects and the equity method to account for investments in other tax credit projects.

Under the proportional amortization method, TCF amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. TCF recognized amortization expense of investments in qualified affordable housing projects of $3.6 million and $8.5 million for the three and nine months ended September 30, 2019, respectively, and $2.4 million and $7.2 million for the three and nine months ended September 30, 2018, respectively. Amortization expense was offset by tax credits and other benefits of $4.5 million and $10.5 million for the three and nine months ended September 30, 2019, respectively, and $2.9 million and $8.5 million for the three and nine months ended September 30, 2018, respectively. TCF's remaining investment in qualified affordable housing projects totaled $231.4 million at September 30, 2019 and $90.9 million at December 31, 2018.

Under the equity method, TCF's share of the earnings or losses is included in other noninterest expense. TCF's remaining investment in federal historical projects, all of which were acquired in the Merger, totaled $38.5 million at September 30, 2019.

TCF's unfunded equity contributions relating to investments in qualified affordable housing projects, federal historical projects and new market tax credits are included in other liabilities. TCF's remaining unfunded equity contributions totaled $128.1 million at September 30, 2019 and $56.2 million at December 31, 2018.

Management analyzes these investments for potential impairment when events or changes in circumstances indicate that it is more-likely-than-not that the carrying amount of the investment will not be realized. An impairment loss is measured as the amount by which the carrying amount of an investment exceeds its fair value.

Investments in qualified affordable housing projects, federal historical projects and new market tax credits are considered VIEs because TCF, as a limited partner, lacks the power to direct the activities that most significantly impact the entities' economic performance. TCF has concluded it is not the primary beneficiary and therefore, they are not consolidated. The maximum exposure to loss on the VIE investments is limited to the carrying amount of the investments and the potential recapture of any recognized tax credits. TCF believes the likelihood of the tax credits being recaptured is remote, as a loss would require the managing entity to fail to meet certain government compliance requirements. Further, certain of TCF's investments in affordable housing limited liability entities include guaranteed minimum returns which are backed by an investment grade credit-rated company, which reduces the risk of loss.

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Regulatory Capital Requirements

9 Months Ended

Sep. 30, 2019

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Regulatory Capital Requirements

Regulatory Capital Requirements

TCF and TCF Bank are subject to minimum capital requirements administered by the federal banking regulators. Failure to meet minimum capital requirements can initiate certain mandatory, and possible additional discretionary, actions by the federal banking regulators that could have a material adverse effect on TCF. In general, TCF Bank may not declare or pay a dividend to TCF in excess of 100% of its net retained earnings for the current year combined with its net retained earnings for the preceding two calendar years, which was $296.6 million at September 30, 2019, without prior approval of the Office of the Comptroller of the Currency ("OCC"). The OCC also has the authority to prohibit the payment of dividends by a national bank when it determines such payments would constitute an unsafe and unsound banking practice. TCF Bank's ability to make capital distributions in the future may require regulatory approval and may be restricted by its federal banking regulators. TCF Bank's ability to make any such distributions will also depend on its earnings and ability to meet minimum regulatory capital requirements in effect during future periods. In the future, these capital adequacy standards may be higher than existing minimum regulatory capital requirements.

Regulatory capital information for TCF and TCF Bank was as follows:

	TCF						TCF Bank
	At September 30,			At December 31,			At September 30,			At December 31,			Well-capitalized Standard under Prompt Corrective Action Provisions		Minimum Capital Requirement for Capital Adequacy Plus Conservation Buffer
(Dollars in thousands)	2019			2018			2019			2018
Regulatory Capital:
Common equity Tier 1 capital	$	4,009,214		$	2,224,183		$	3,991,895		$	2,282,013
Tier 1 capital	4,197,706			2,408,393			4,015,208			2,300,472
Total capital	4,652,708			2,750,581			4,487,968			2,675,347
Regulatory Capital Ratios:
Common equity Tier 1 capital ratio	10.88		%	10.82		%	10.85		%	11.10		%	6.50	%	7.00	%
Tier 1 risk-based capital ratio	11.40			11.72			10.91			11.19			8.00		8.50
Total risk-based capital ratio	12.63			13.38			12.20			13.01			10.00		10.50
Tier 1 leverage ratio	11.16			10.44			10.68			9.97			5.00		4.00

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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income attributable to TCF Financial Corporation	$ 22,148	$ 86,196	$ 183,069	$ 218,706
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on available for sale investment securities and interest-only strips	19,230	(13,434)	87,223	(46,059)
Net unrealized gains (losses) on net investment hedges	1,641	(1,904)	(2,846)	3,479
Foreign currency translation adjustment	(1,968)	2,899	5,014	(4,136)
Recognized postretirement prior service cost	(9)	(9)	(25)	(26)
Total other comprehensive income (loss), net of tax	18,894	(12,448)	89,366	(46,742)
Comprehensive income	$ 41,042	$ 73,748	$ 272,435	$ 171,964

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Loan Servicing Rights (Tables)

9 Months Ended

Sep. 30, 2019

Transfers and Servicing [Abstract]

Schedule of Servicing Assets at Fair Value

Information regarding LSRs was as follows:

(Dollars in thousands)	At or For the Three Months Ended September 30, 2019			At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	18		$	23
Acquired in the Merger	59,567			59,567
New servicing assets created	1,906			1,906
Impairment (charge) recovery	(4,520		)	(4,520		)
Amortization	(1,670		)	(1,675		)
Balance, end of period	$	55,301		$	55,301
Valuation allowance, end of period	$	(4,520	)	$	(4,520	)
Loans serviced for others that have servicing rights capitalized, end of period	$	6,647,153		$	6,647,153

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Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Nov. 08, 2019
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	000-08185
Entity Registrant Name	TCF Financial Corporation
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-2022454
Entity Address, Address Line One	333 W. Fort Street, Suite 1800
Entity Address, City or Town	Detroit
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48226
City Area Code	(800)
Local Phone Number	867-9757
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		153,406,792
Entity Central Index Key	0000019612
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock (par value $1 per share)
Trading Symbol	TCF
Security Exchange Name	NASDAQ
Series C Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Depositary shares, each representing a 1/1000th interest in a share of the 5.70% Series C Non-Cumulative Perpetual Preferred Stock
Trading Symbol	TCFCP
Security Exchange Name	NASDAQ

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Loans and Leases (Tables)

9 Months Ended

Sep. 30, 2019

Receivables [Abstract]

Schedule of Loans and Leases

Loans and leases were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	10,810,534	$	6,220,632
Commercial real estate	8,876,779		2,908,313
Lease financing	2,594,373		2,530,163
Total commercial loan and lease portfolio	22,281,686		11,659,108
Consumer loan portfolio:
Residential mortgage	6,057,404		2,335,835
Consumer installment	1,562,252		2,003,572
Home equity	3,609,410		3,074,505
Total consumer loan portfolio	11,229,066		7,413,912
Total loans and leases(1)	$	33,510,752	$	19,073,020

(1)

Loans and leases are reported at historical cost including net direct fees and costs associated with originating and acquiring loans and leases, lease residuals, unearned income and unamortized purchase premiums and discounts. The aggregate amount of loan and lease adjustments was a net deferred cost of $234.4 million and $1.5 million at September 30, 2019 and December 31, 2018, respectively.

Summary of PCI Loans

Information regarding acquired loans included in net loans and leases acquired at the Merger Date was as follows:

(In thousands)
PCI loans:
Contractually required payments receivable	$	458,374
Nonaccretable difference	(105,031		)
Expected cash flows	353,343
Accretable yield	39,733
Fair value of PCI loans	$	313,610
Purchased nonimpaired loans and leases:
Unpaid principal balance	$	15,636,020
Fair value discount	(223,417		)
Fair value at acquisition	15,412,603
Total fair value at acquisition	$	15,726,213

The carrying value and changes in accretable yield of all PCI loans were as follows:

	At or For the Three Months Ended September 30,						At or For the Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Balance of PCI loans, beginning of period	$	2,273		$	7,033		$	3,816		$	11,844
Accretable Yield
Balance, beginning of period	$	401		$	439		$	961		$	1,051
Addition attributable to the Merger	39,733			—			39,733			—
Accretion recognized in interest income	(4,312		)	(38		)	(5,015		)	(188		)
Net reclassification (to) from nonaccretable difference	(517		)	—			179			370
Payments received	(824		)	26			(1,377		)	(806		)
Balance, end of period	$	34,481		$	427		$	34,481		$	427
Balance of PCI loans, end of period	$	293,713		$	4,802		$	293,713		$	4,802

Schedule of Components of Total Lease Income

The components of total lease income were as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Interest income - loans and leases:
Interest income on net investment in direct financing and sales-type leases	$	32,832	$	98,116
Leasing revenue (noninterest income):
Lease income from operating lease payments	25,444		76,140
Profit (loss) recorded on commencement date on sales-type leases	7,983		22,289
Gains (losses) on sales of leased equipment	6,163		18,603
Leasing revenue	39,590		117,032
Total lease income	$	72,422	$	215,148

The components of the net investment in direct financing and sales-type leases were as follows:

(In thousands)	At September 30, 2019
Carrying amount	$	2,682,097
Unguaranteed residual assets	148,669
Net direct fees and costs and unearned income	(236,393		)
Total net investment in direct financing and sales-type leases	$	2,594,373

Schedule of Components of Total Lease Income

The components of the net investment in direct financing and sales-type leases were as follows:

(In thousands)	At September 30, 2019
Carrying amount	$	2,682,097
Unguaranteed residual assets	148,669
Net direct fees and costs and unearned income	(236,393		)
Total net investment in direct financing and sales-type leases	$	2,594,373

The components of total lease income were as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Interest income - loans and leases:
Interest income on net investment in direct financing and sales-type leases	$	32,832	$	98,116
Leasing revenue (noninterest income):
Lease income from operating lease payments	25,444		76,140
Profit (loss) recorded on commencement date on sales-type leases	7,983		22,289
Gains (losses) on sales of leased equipment	6,163		18,603
Leasing revenue	39,590		117,032
Total lease income	$	72,422	$	215,148

Undiscounted Future Minimum Lease Payments Receivable for Direct Financing and Sales-type Leases

Undiscounted future minimum lease payments receivable for direct financing and sales-type leases, and a reconciliation to the carrying amount recorded at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	51,851
2020	333,516
2021	459,359
2022	554,951
2023	563,752
Thereafter	612,063
Equipment under leases not yet commenced	47,948
Total undiscounted future minimum lease payments receivable for direct financing and sales-type leases	2,623,440
Third-party residual value guarantees	58,657
Total carrying amount of direct financing and sales-type leases	$	2,682,097

Undiscounted Future Minimum Lease Payments Expected to be Received for Operating Leases

Undiscounted future minimum lease payments expected to be received for operating leases at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	20,087
2020	71,120
2021	48,885
2022	25,915
2023	9,777
Thereafter	4,717
Total undiscounted future minimum lease payments	$	180,501

Summary of Net Gains On Sales of Loans

The following table summarizes the net gains on sales of loans and leases. TCF retains servicing on a majority of loans sold. See Note 11. Loan Servicing Rights for further information.

	Three Months Ended September 30,						Nine Months Ended September 30,
(In millions)	2019			2018			2019			2018
Sale proceeds, net	$	472,800		$	410,389		$	1,066,576		$	940,134
Recorded investment in loans and leases sold, including accrued interest	458,697			393,078			1,033,961			911,218
Interest-only strips at initial value and other	(20,087		)	(8,809		)	(19,241		)	(4,016		)
Net (losses) gains on sales of loans and leases	$	(5,984	)	$	8,502		$	13,374		$	24,900

Interest-only Strips

Interest-only strips related to loan sales were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Interest-only strips	$	14,078	$	16,835

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Accumulated Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2019

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Summary of Components of Other Comprehensive Income (Loss), Reclassifications from Accumulated Other Comprehensive Income (Loss) to Various Financial Statement Line Items and the Related Tax Effects

The components of other comprehensive income (loss), reclassifications from accumulated other comprehensive income (loss) to various financial statement line items and the related tax effects were as follows:

	Three Months Ended September 30,
	2019									2018
(In thousands)	Before Tax			Tax Effect			Net of Tax			Before Tax			Tax Effect			Net of Tax
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips:
Net unrealized gains (losses) arising during the period	$	24,236		$	(5,606	)	$	18,630		$	(18,086	)	$	4,516		$	(13,570	)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss) to:
Total interest income	844			(205		)	639			263			(65		)	198
Net gains (losses) on investment securities	—			—			—			—			—			—
Other noninterest expense	(53		)	14			(39		)	(84		)	22			(62		)
Amounts reclassified from accumulated other comprehensive income (loss)	791			(191		)	600			179			(43		)	136
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips	25,027			(5,797		)	19,230			(17,907		)	4,473			(13,434		)
Recognized postretirement prior service cost:
Reclassification of amortization of prior service cost to other noninterest expense	(12		)	3			(9		)	(12		)	3			(9		)
Foreign currency translation adjustment(1)	(1,968		)	—			(1,968		)	2,899			—			2,899
Net unrealized gains (losses) on net investment hedges	2,170			(529		)	$	1,641		(2,537		)	633			(1,904		)
Total other comprehensive income (loss)	$	25,217		$	(6,323	)	$	18,894		$	(17,557	)	$	5,109		$	(12,448	)
	Nine Months Ended September 30,
	2019									2018
(In thousands)	Before Tax			Tax Effect			Net of Tax			Before Tax			Tax Effect			Net of Tax
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips:
Net unrealized gains (losses) arising during the period	$	114,263		$	(27,519	)	$	86,744		$	(62,521	)	$	15,688		$	(46,833	)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss) to:
Total interest income	2,495			(607		)	1,888			810			(202		)	608
Net gains (losses) on investment securities	(1,513		)	368			(1,145		)	—			—			—
Other noninterest expense	(350		)	86			(264		)	221			(55		)	166
Amounts reclassified from accumulated other comprehensive income (loss)	632			(153		)	479			1,031			(257		)	774
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips	114,895			(27,672		)	87,223			(61,490		)	15,431			(46,059		)
Recognized postretirement prior service cost:
Reclassification of amortization of prior service cost to other noninterest expense	(35		)	10			(25		)	(35		)	9			(26		)
Foreign currency translation adjustment(1)	5,014			—			5,014			(4,136		)	—			(4,136		)
Net unrealized gains (losses) on net investment hedges	(3,761		)	915			(2,846		)	4,637			(1,158		)	3,479
Total other comprehensive income (loss)	$	116,113		$	(26,747	)	$	89,366		$	(61,024	)	$	14,282		$	(46,742	)

(1)

Foreign investments are deemed to be permanent in nature and, therefore, TCF does not provide for taxes on foreign currency translation adjustments.

Schedule of Components of Accumulated Other Comprehensive Income (Loss)

The components of accumulated other comprehensive income (loss) were as follows:

(In thousands)	Net Unrealized Gains (Losses) on Available-for-Sale Investment Securities and Interest-only Strips			Net Unrealized Gains (Losses) on Net Investment Hedges			Foreign Currency Translation Adjustment			Recognized Postretirement Prior Service Cost			Total
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	39,971		$	10,499		$	(13,229	)	$	93		$	37,334
Other comprehensive income (loss)	18,630			1,641			(1,968		)	—			18,303
Amounts reclassified from accumulated other comprehensive income (loss)	600			—			—			(9		)	591
Net other comprehensive income (loss)	19,230			1,641			(1,968		)	(9		)	18,894
Balance, end of period	$	59,201		$	12,140		$	(15,197	)	$	84		$	56,228
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	(48,978	)	$	9,919		$	(13,878	)	$	126		$	(52,811	)
Other comprehensive income (loss)	(13,570		)	(1,904		)	2,899			—			(12,575		)
Amounts reclassified from accumulated other comprehensive income (loss)	136			—			—			(9		)	127
Net other comprehensive income (loss)	(13,434		)	(1,904		)	2,899			(9		)	(12,448		)
Balance, end of period	$	(62,412	)	$	8,015		$	(10,979	)	$	117		$	(65,259	)
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	(28,022	)	$	14,986		$	(20,211	)	$	109		$	(33,138	)
Other comprehensive income (loss)	86,744			(2,846		)	5,014			—			88,912
Amounts reclassified from accumulated other comprehensive income (loss)	479			—			—			(25		)	454
Net other comprehensive income (loss)	87,223			(2,846		)	5,014			(25		)	89,366
Balance, end of period	$	59,201		$	12,140		$	(15,197	)	$	84		$	56,228
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	(16,353	)	$	4,536		$	(6,843	)	$	143		$	(18,517	)
Other comprehensive income (loss)	(46,833		)	3,479			(4,136		)	—			(47,490		)
Amounts reclassified from accumulated other comprehensive income (loss)	774			—			—			(26		)	748
Net other comprehensive income (loss)	(46,059		)	3,479			(4,136		)	(26		)	(46,742		)
Balance, end of period	$	(62,412	)	$	8,015		$	(10,979	)	$	117		$	(65,259	)

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Operating Lease Right-of-Use Assets and Liabilities - Weighted Average Discount Rate and Remaining Lease Term (Details)	Sep. 30, 2019
Leases [Abstract]
Weighted-average discount rate	2.66%
Weighted average remaining lease term (years)	6 years 7 months 6 days

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Basis of Presentation

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

On August 1, 2019 (the "Merger Date"), TCF Financial Corporation, a Delaware corporation ("Legacy TCF"), merged with and into Chemical Financial Corporation, a Michigan corporation ("Chemical"), with Chemical continuing as the surviving legal corporation (the "Merger"). Immediately following the Merger, Chemical’s wholly owned bank subsidiary, Chemical Bank, a Michigan state-chartered bank, merged with and into Legacy TCF’s wholly owned bank subsidiary, TCF National Bank, a national banking association, with TCF National Bank surviving the merger (“TCF Bank”). Upon completion of the Merger, Chemical was renamed TCF Financial Corporation. TCF Financial Corporation (together with its direct and indirect subsidiaries, "we," "us," "our," "TCF" or the "Corporation"), is a financial holding company, headquartered in Detroit, Michigan. TCF Bank has its main office in Sioux Falls, South Dakota. References herein to "TCF Financial" or the "Holding Company" refer to TCF Financial Corporation on an unconsolidated basis.

The Merger was accounted for as a reverse merger using the acquisition method of accounting, which means that for accounting and financial reporting purposes, Legacy TCF was deemed to have acquired Chemical in the Merger, even though Chemical was the legal acquirer. Accordingly, Legacy TCF's historical financial statements are the historical financial statements of the combined company for all periods before the Merger Date. TCF's results of operations for the third quarter of 2019 and the first nine months of 2019 include the results of operations of Chemical on and after August 1, 2019. Results for periods before August 1, 2019 reflect only those of Legacy TCF and do not include the results of operations of Chemical. The number of shares issued and outstanding, earnings per share, additional paid-in-capital, dividends paid and all references to share quantities of TCF have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of Legacy TCF common stock in the Merger. See Note 2. Merger for further information. In addition, the assets and liabilities of Chemical as of the Merger Date have been recorded at their estimated fair value and added to those of Legacy TCF.

TCF Bank operates bank branches in Michigan, Minnesota, Illinois, Ohio, Indiana, Colorado, Wisconsin, Arizona and South Dakota (TCF's "primary banking markets"). Through its direct subsidiaries, TCF Bank provides a full range of consumer-facing and commercial services, including consumer and commercial banking, trust and wealth management, and specialty leasing and lending products and services to consumers, small businesses and commercial customers.

The accompanying unaudited consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and in accordance with the instructions to Quarterly Report on Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission ("SEC"). Accordingly, the consolidated financial statements do not include all of the information and notes necessary for complete financial statements in conformity with GAAP. In the opinion of management, the accompanying unaudited consolidated financial statements contain all the significant adjustments, consisting of normal recurring items, considered necessary for fair presentation. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. These interim unaudited financial statements should be read in connection with the Legacy TCF audited Consolidated Financial Statements and notes thereto, at and for the year ended December 31, 2018, which were filed as Exhibit 99.1 to TCF's Current Report on Form 8-K filed with the SEC on August 1, 2019, and together with Management's Discussion and Analysis of Financial Condition and Results of Operations included in the Annual Report on Form 10-K of Legacy TCF for the year ended December 31, 2018.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. These estimates are based on information available to management at the time the estimates are made. Actual results could differ from those estimates. Certain reclassifications have been made to prior period financial statements to conform to the current period presentation.

In connection with the Merger, effective August 1, 2019, TCF renamed its Wholesale Banking segment to Commercial Banking to align with the way TCF is now managed. In addition, activity that was related to small business banking and private banking were moved from the Wholesale Banking (now named Commercial Banking) segment to the Consumer Banking segment. The revised presentation of previously reported segment data has been applied retroactively for all periods presented in these financial statements. See Note 25. Reportable Segments for further information.

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Deposits - Summary of Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Noninterest-bearing	$ 7,959,455	$ 3,921,710
Interest-bearing	6,260,136	2,452,954
Total checking	14,219,591	6,374,664
Savings	8,362,170	6,122,257
Money market	3,621,729	1,193,782
Certificates of deposit	6,949,082	3,797,241
Brokered deposits	2,133,502	1,415,742
Total deposits	$ 35,286,074	$ 18,903,686

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Allowance for Loan and Lease Losses and Credit Quality - Other Real Estate Owned and Repossessed Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Other real estate owned	$ 27,638	$ 17,403
Repossessed and returned assets	14,598	14,574
Consumer loans in process of foreclosure	$ 15,509	$ 15,540

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Fair Values Measurements - Fair Value Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 114,831	$ 18,070
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	1,220,757
Loans and leases	130,991	57,663
Other real estate owned	17,924	9,397
Repossessed and returned assets	12,603	9,523
Total assets at fair value	1,382,275	76,583
Level 1 | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0
Loans and leases	0	0
Other real estate owned	0	0
Repossessed and returned assets	0	0
Total assets at fair value	0	0
Level 2 | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	136
Loans and leases	0	0
Other real estate owned	0	0
Repossessed and returned assets	6,841	4,358
Total assets at fair value	6,977	4,358
Level 3 | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	1,220,621
Loans and leases	130,991	57,663
Other real estate owned	17,924	9,397
Repossessed and returned assets	5,762	5,165
Total assets at fair value	$ 1,375,298	$ 72,225

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Merger - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Aug. 01, 2019	Sep. 30, 2019	Dec. 31, 2018
Purchase price consideration:
Stock	$ 3,018,556
Fair value of assets acquired:
Cash and cash equivalents	975,014
Federal Home Loan Bank and Federal Reserve Bank stocks	218,582
Investment securities	3,774,738
Loans held-for-sale	44,532
Loans and leases	15,726,213
Premises and equipment	140,219
Loan servicing rights	59,567
Other intangible assets	201,568
Net deferred tax asset	49,345
Other assets	553,796
Total assets acquired	21,743,574
Fair value of liabilities assumed:
Deposits	16,418,019
Short-term borrowings	2,629,426
Long-term borrowings	442,323
Other liabilities	345,604
Total liabilities assumed	19,835,372
Fair value of net identifiable assets	1,908,202
Goodwill	$ 1,110,354	$ 1,265,111	$ 154,757

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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Aug. 01, 2019	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Change in Accounting Principle
Right-of-use assets	$ 114,200
Lease liabilities	135,143
Loans and leases	33,510,752				$ 19,073,020
Allowance for loan and lease losses	121,218		$ 146,503		$ 157,446	$ 160,621	$ 165,619	$ 171,041
Accounting Standards Update 2016-02
Change in Accounting Principle
Right-of-use assets				$ 91,900
Lease liabilities				$ 112,800
Chemical Financial Corporation
Change in Accounting Principle
Right-of-use assets	39,800	$ 39,800
Lease liabilities	41,600	$ 41,600
Legacy TCF
Change in Accounting Principle
Loans and leases	17,800,000
Allowance for loan and lease losses	$ 117,100
Minimum | Accounting Standards Update 2019-05
Change in Accounting Principle
Projected increase in allowance for loan losses, percent	35.00%
Maximum | Accounting Standards Update 2019-05
Change in Accounting Principle
Projected increase in allowance for loan losses, percent	45.00%

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Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 4.5	$ 0.9	$ 6.2	$ 2.6

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Fair Values Measurements - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amount of loans recorded under the fair value option that were delinquent or on non-accrual status	$ 0		$ 0
Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.1000		0.1000
Repossessed and returned assets, measurement input	0.2000		0.2000
Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.5400		0.5400
Other real estate owned, measurement input	0.0800		0.0800
Repossessed and returned assets, measurement input	0.3000		0.3000
Net (loss) gain on sales of loans and leases | Loans Held for Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net gain from initial measurement of the correspondent lending loans held for sale and subsequent changes in fair value for loans outstanding	$ 12,400,000	$ 2,700,000	$ 18,300,000	$ 6,900,000

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Derivative Instruments - Derivatives Gross Amounts Recognized and Offset (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivative Assets
Gross amounts recognized	$ 137,394	$ 15,250
Gross amounts offset	(2,152)	(6,982)
Net amount presented	135,242	8,268
Derivative Liabilities
Gross amounts recognized	103,564	4,356
Gross amounts offset	(93,785)	(991)
Net amount presented	9,779	3,365
Interest rate contracts
Derivative Assets
Gross amounts recognized	130,391	7,909
Gross amounts offset	(312)	(395)
Net amount presented	130,079	7,514
Derivative Liabilities
Gross amounts recognized	101,910	3,732
Gross amounts offset	(93,099)	(395)
Net amount presented	8,811	3,337
Interest rate lock commitments
Derivative Assets
Gross amounts recognized	4,554	652
Gross amounts offset	(8)	0
Net amount presented	4,546	652
Derivative Liabilities
Gross amounts recognized	113	28
Gross amounts offset	(8)	0
Net amount presented	105	28
Forward loan sales commitments
Derivative Assets
Gross amounts recognized	166
Gross amounts offset	(166)
Net amount presented	0
Derivative Liabilities
Gross amounts recognized	253
Gross amounts offset	(166)
Net amount presented	87
Power Equity CDs
Derivative Assets
Gross amounts recognized	617
Gross amounts offset	0
Net amount presented	617
Derivative Liabilities
Gross amounts recognized	617
Gross amounts offset	0
Net amount presented	617
Forward foreign exchange contracts
Derivative Assets
Gross amounts recognized	1,666	6,689
Gross amounts offset	(1,666)	(6,587)
Net amount presented	0	102
Derivative Liabilities
Gross amounts recognized	315	13
Gross amounts offset	(156)	(13)
Net amount presented	159	0
Swap agreement
Derivative Liabilities
Gross amounts recognized	356	583
Gross amounts offset	(356)	(583)
Net amount presented	$ 0	$ 0

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Parent Company Financial Information - Condensed Statements of Financial Condition (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Assets [Abstract]
Cash and cash equivalents	$ 1,323,014	$ 587,057	$ 569,968	$ 621,782
Premises and equipment, net	554,194	427,534
Other assets	1,439,305	792,936
Total assets	45,692,511	23,699,612	22,904,785
Liabilities and Equity
Long term borrowings	860,482
Other liabilities	1,245,238	790,194
Total liabilities	39,999,094	21,143,352
Equity	5,670,104	2,537,801
Total liabilities and equity	45,692,511	23,699,612
TCF
Assets [Abstract]
Cash and cash equivalents	165,457	91,132	$ 81,982	$ 80,471
Premises and equipment, net	3,883	78
Deferred tax asset	13,485	2,974
Investment in TCF Bank	5,483,484	2,426,329
Accounts receivable from TCF Bank	19,849	23,780
Other assets	25,823	1,201
Total assets	5,711,981	2,545,494
Liabilities and Equity
Long term borrowings	19,005	0
Other liabilities	22,872	7,693
Total liabilities	41,877	7,693
Equity	5,670,104	2,537,801
Total liabilities and equity	$ 5,711,981	$ 2,545,494

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Operating Lease Right-of-Use Assets and Liabilities

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Operating Lease Right-of-Use Assets and Liabilities

Operating Lease Right-of-Use Assets and Liabilities

Operating lease right-of-use assets, included in other assets, were $114.2 million at September 30, 2019. Operating lease liabilities, included in accrued expenses and other liabilities, were $135.1 million at September 30, 2019. In connection with the Merger, TCF recorded $39.8 million and $41.6 million of operating lease right-of-use assets and operating lease liabilities, respectively. Undiscounted future minimum operating lease payments and a reconciliation to the amount recorded as operating lease liabilities at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	9,137
2020	32,687
2021	23,902
2022	18,624
2023	15,807
Thereafter	48,737
Total undiscounted future minimum operating lease payments	148,894
Discount	(13,751		)
Total operating lease liabilities	$	135,143

As of September 30, 2019, TCF had approximately $250.1 million in additional leases for real property that have not yet commenced and are excluded from the operating lease liability table above. Of this amount, $231.7 million was related to a lease agreement for TCF Financial's new headquarters building in Detroit, Michigan signed on May 31, 2019 by Legacy Chemical, with an organization 50% owned by indirect related parties. The new headquarter lease has a term of 22.5 years commencing January 1, 2022 with renewal options.

The weighted-average discount rate and remaining lease term for operating leases were as follows:

	At September 30, 2019
Weighted-average discount rate	2.66	%
Weighted-average remaining lease term (years)	6.6

The components of total lease cost for operating leases, included in occupancy and equipment noninterest expense, were as follows:

	Three Months Ended			Nine Months Ended
(In thousands)	September 30, 2019
Lease expense	$	10,367		$	28,488
Short-term and variable lease cost	241			332
Sublease income	(447		)	(1,189		)
Total lease cost for operating leases	$	10,161		$	27,631

Supplemental cash flow information related to operating leases was as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	395	$	118,100
Cash paid for amounts included in the measurement of lease liabilities - operating	8,807		23,841

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Accumulated Other Comprehensive Income

9 Months Ended

Sep. 30, 2019

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Income

The components of other comprehensive income (loss), reclassifications from accumulated other comprehensive income (loss) to various financial statement line items and the related tax effects were as follows:

	Three Months Ended September 30,
	2019									2018
(In thousands)	Before Tax			Tax Effect			Net of Tax			Before Tax			Tax Effect			Net of Tax
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips:
Net unrealized gains (losses) arising during the period	$	24,236		$	(5,606	)	$	18,630		$	(18,086	)	$	4,516		$	(13,570	)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss) to:
Total interest income	844			(205		)	639			263			(65		)	198
Net gains (losses) on investment securities	—			—			—			—			—			—
Other noninterest expense	(53		)	14			(39		)	(84		)	22			(62		)
Amounts reclassified from accumulated other comprehensive income (loss)	791			(191		)	600			179			(43		)	136
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips	25,027			(5,797		)	19,230			(17,907		)	4,473			(13,434		)
Recognized postretirement prior service cost:
Reclassification of amortization of prior service cost to other noninterest expense	(12		)	3			(9		)	(12		)	3			(9		)
Foreign currency translation adjustment(1)	(1,968		)	—			(1,968		)	2,899			—			2,899
Net unrealized gains (losses) on net investment hedges	2,170			(529		)	$	1,641		(2,537		)	633			(1,904		)
Total other comprehensive income (loss)	$	25,217		$	(6,323	)	$	18,894		$	(17,557	)	$	5,109		$	(12,448	)
	Nine Months Ended September 30,
	2019									2018
(In thousands)	Before Tax			Tax Effect			Net of Tax			Before Tax			Tax Effect			Net of Tax
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips:
Net unrealized gains (losses) arising during the period	$	114,263		$	(27,519	)	$	86,744		$	(62,521	)	$	15,688		$	(46,833	)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss) to:
Total interest income	2,495			(607		)	1,888			810			(202		)	608
Net gains (losses) on investment securities	(1,513		)	368			(1,145		)	—			—			—
Other noninterest expense	(350		)	86			(264		)	221			(55		)	166
Amounts reclassified from accumulated other comprehensive income (loss)	632			(153		)	479			1,031			(257		)	774
Net unrealized gains (losses) on available-for-sale investment securities and interest-only strips	114,895			(27,672		)	87,223			(61,490		)	15,431			(46,059		)
Recognized postretirement prior service cost:
Reclassification of amortization of prior service cost to other noninterest expense	(35		)	10			(25		)	(35		)	9			(26		)
Foreign currency translation adjustment(1)	5,014			—			5,014			(4,136		)	—			(4,136		)
Net unrealized gains (losses) on net investment hedges	(3,761		)	915			(2,846		)	4,637			(1,158		)	3,479
Total other comprehensive income (loss)	$	116,113		$	(26,747	)	$	89,366		$	(61,024	)	$	14,282		$	(46,742	)

(1) Foreign investments are deemed to be permanent in nature and, therefore, TCF does not provide for taxes on foreign currency translation adjustments.

The components of accumulated other comprehensive income (loss) were as follows:

(In thousands)	Net Unrealized Gains (Losses) on Available-for-Sale Investment Securities and Interest-only Strips			Net Unrealized Gains (Losses) on Net Investment Hedges			Foreign Currency Translation Adjustment			Recognized Postretirement Prior Service Cost			Total
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	39,971		$	10,499		$	(13,229	)	$	93		$	37,334
Other comprehensive income (loss)	18,630			1,641			(1,968		)	—			18,303
Amounts reclassified from accumulated other comprehensive income (loss)	600			—			—			(9		)	591
Net other comprehensive income (loss)	19,230			1,641			(1,968		)	(9		)	18,894
Balance, end of period	$	59,201		$	12,140		$	(15,197	)	$	84		$	56,228
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	(48,978	)	$	9,919		$	(13,878	)	$	126		$	(52,811	)
Other comprehensive income (loss)	(13,570		)	(1,904		)	2,899			—			(12,575		)
Amounts reclassified from accumulated other comprehensive income (loss)	136			—			—			(9		)	127
Net other comprehensive income (loss)	(13,434		)	(1,904		)	2,899			(9		)	(12,448		)
Balance, end of period	$	(62,412	)	$	8,015		$	(10,979	)	$	117		$	(65,259	)
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	(28,022	)	$	14,986		$	(20,211	)	$	109		$	(33,138	)
Other comprehensive income (loss)	86,744			(2,846		)	5,014			—			88,912
Amounts reclassified from accumulated other comprehensive income (loss)	479			—			—			(25		)	454
Net other comprehensive income (loss)	87,223			(2,846		)	5,014			(25		)	89,366
Balance, end of period	$	59,201		$	12,140		$	(15,197	)	$	84		$	56,228
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	(16,353	)	$	4,536		$	(6,843	)	$	143		$	(18,517	)
Other comprehensive income (loss)	(46,833		)	3,479			(4,136		)	—			(47,490		)
Amounts reclassified from accumulated other comprehensive income (loss)	774			—			—			(26		)	748
Net other comprehensive income (loss)	(46,059		)	3,479			(4,136		)	(26		)	(46,742		)
Balance, end of period	$	(62,412	)	$	8,015		$	(10,979	)	$	117		$	(65,259	)

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Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

TCF earns a variety of revenue, including interest and fees, from customers, as well as revenues from noncustomers. The majority of TCF's sources of revenue are included in interest income and noninterest income and are outside of the scope of ASC Topic 606, Revenue from Contracts with Customers ("ASC 606"). Other sources of revenue fall within the scope of ASC 606 and are mostly included in noninterest income.

TCF recognizes revenue when the performance obligations related to the transfer of goods or services under the terms of a contract are satisfied. Some obligations are satisfied at a point in time, while others are satisfied over a period of time. Revenue is recognized as the amount of consideration expected to be received in exchange for transferring goods or services to a customer and is segregated based on the nature of product and services offered as part of contractual arrangements. Revenue streams within the scope of ASC 606 are discussed below.

• Fees and Service Charges on Deposit Accounts Fees and service charges on deposit accounts includes fees and other charges TCF receives to provide various services, including but not limited to, service charges on deposit accounts and other fees including account analysis fees, monthly service fees, overdraft services, transferring funds, and accepting and executing stop-payment orders. TCF's performance obligation for account analysis fees and monthly service fees are generally satisfied and, therefore, revenue is recognized over the period in which the service is provided. Deposit account related fees are largely transactional based, and therefore, the performance obligation is satisfied and the related revenue is recognized at the point in time when the transaction occurs.

• Wealth Management Revenue Wealth management revenue includes fee income generated from personal and institutional customers. TCF also provides investment management services. Revenue is recognized over the period of time the services are rendered. Wealth management revenue also includes commissions that are earned for placing a brokerage transaction for execution. Revenue is recognized once the transaction is completed and TCF is entitled to receive consideration.

• Card and ATM Revenue Card and ATM revenue includes ATM surcharges and debit card related revenue. ATM surcharges and certain debit card fees are transactional based and, therefore, the performance obligation is satisfied and the related revenue is recognized at the point in time when the transaction occurs. Other debit card fees satisfied over a period of time are recognized over the period in which the service is provided.

• Other Noninterest Income Other noninterest income includes wire transfer fees, safe deposit box income and check orders. The consideration includes both fixed (e.g., safe deposit box fees) and transaction (i.e., wire-transfer fee and check orders) fees. Fixed fees are recognized over the period of time the service is provided, while transaction fees are recognized when a specific service is rendered to the customer.

• Net Foreclosed Real Estate and Repossessed Assets Expense Net foreclosed real estate and repossessed assets expense includes net gain or loss on sales of other real estate owned and repossessed assets. Revenue is recognized at the time the sale is complete and TCF is entitled to receive consideration, including sales that are seller financed as receipt of all payment is expected.

The following tables present total noninterest income segregated between contracts with customers within the scope of ASC 606 and those within the scope of other GAAP topics.

	Three Months Ended September 30, 2019
	Within the scope of ASC 606								Out of scope of ASC 606			Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	29,198		$	1,308		$	—	$	3,878		$	34,384
Wealth management revenue	1,047			—			—		3,194			$	4,241
Card and ATM revenue	21,476			23			—		1,816			$	23,315
Other noninterest income	137			(2,887		)	2,610		(12,169		)	$	(12,309	)
Total	$	51,858		$	(1,556	)	$	2,610	$	(3,281	)	$	49,631
Noninterest expense
Net foreclosed real estate and repossessed assets	$	(593	)	$	214		$	—	$	2,582		$	2,203

	Three Months Ended September 30, 2018
	Within the scope of ASC 606								Out of scope of ASC 606		Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	28,055		$	1,082		$	—	$	38	$	29,175
Wealth management revenue	—			—			—		—		$	—
Card and ATM revenue	19,999			14			—		61		$	20,074
Other noninterest income	(100		)	(2,649		)	4,686		4,306		$	6,243
Total	$	47,954		$	(1,553	)	$	4,686	$	4,405	$	55,492
Noninterest expense
Net foreclosed real estate and repossessed assets	$	215		$	(59	)	$	—	$	3,724	$	3,880

	Nine Months Ended September 30, 2019
	Within the scope of ASC 606								Out of scope of ASC 606			Total
(In thousands)	Consumer Banking			Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	81,098		$	3,504		$	—	$	3,902		$	88,504
Wealth management revenue	1,047			—			—		3,194			$	4,241
Card and ATM revenue	60,581			62			—		1,827			$	62,470
Other noninterest income	1,504			(5,271		)	9,986		(6,531		)	$	(312	)
Total	$	144,230		$	(1,705	)	$	9,986	$	2,392		$	154,903
Noninterest expense
Net foreclosed real estate and repossessed assets	$	(152	)	$	536		$	—	$	8,897		$	9,281

	Nine Months Ended September 30, 2018
	Within the scope of ASC 606							Out of scope of ASC 606			Total
(In thousands)	Consumer Banking		Commercial Banking			Enterprise Services
Noninterest income
Fees and service charges on deposit accounts	$	80,468	$	3,137		$	—	$	98		$	83,703
Wealth management revenue	—		—			—		—			$	—
Card and ATM revenue	58,095		39			—		179			$	58,313
Other noninterest income	33,729		(6,771		)	15,112		(21,450		)	$	20,620
Total	$	172,292	$	(3,595	)	$	15,112	$	(21,173	)	$	162,636
Noninterest expense
Net foreclosed real estate and repossessed assets	$	719	$	(108	)	$	—	$	12,043		$	12,654

Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity's obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. TCF's noninterest income streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is most often received immediately or shortly after TCF satisfies its performance obligation and revenue is recognized. TCF does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances.

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Regulatory Capital Requirements (Tables)

9 Months Ended

Sep. 30, 2019

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Regulatory Capital Information for TCF and TCF Bank

Regulatory capital information for TCF and TCF Bank was as follows:

	TCF						TCF Bank
	At September 30,			At December 31,			At September 30,			At December 31,			Well-capitalized Standard under Prompt Corrective Action Provisions		Minimum Capital Requirement for Capital Adequacy Plus Conservation Buffer
(Dollars in thousands)	2019			2018			2019			2018
Regulatory Capital:
Common equity Tier 1 capital	$	4,009,214		$	2,224,183		$	3,991,895		$	2,282,013
Tier 1 capital	4,197,706			2,408,393			4,015,208			2,300,472
Total capital	4,652,708			2,750,581			4,487,968			2,675,347
Regulatory Capital Ratios:
Common equity Tier 1 capital ratio	10.88		%	10.82		%	10.85		%	11.10		%	6.50	%	7.00	%
Tier 1 risk-based capital ratio	11.40			11.72			10.91			11.19			8.00		8.50
Total risk-based capital ratio	12.63			13.38			12.20			13.01			10.00		10.50
Tier 1 leverage ratio	11.16			10.44			10.68			9.97			5.00		4.00

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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 192,470	$ 227,472
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	50,879	27,874
Share-based compensation expense	17,762	14,040
Depreciation and amortization	207,954	153,018
Provision (benefit) for deferred income taxes	(27,732)	33,409
Net gains on sales of assets	(46,966)	(28,977)
Proceeds from sales of loans and leases held-for-sale	512,051	264,970
Originations of loans and leases held-for-sale, net of repayments	(548,371)	(271,793)
Impairment of loan servicing rights	4,520	0
Net change in other assets	(188,081)	21,984
Net change in other liabilities	16,229	(1,849)
Other, net	(34,793)	(29,668)
Net cash provided by (used in) operating activities	155,922	410,480
Cash flows from investing activities
Proceeds from sales of investment securities available-for-sale	1,993,274	0
Proceeds from maturities of and principal collected on investment securities available-for-sale	398,989	120,183
Purchases of investment securities available-for-sale	(1,424,344)	(919,645)
Proceeds from maturities of and principal collected on investment securities held-to-maturity	11,945	11,259
Purchases of investment securities held-to-maturity	(4,029)	(2,187)
Redemption of Federal Home Loan Bank stock	162,011	201,001
Purchases of Federal Home Loan Bank stock	(142,000)	(199,000)
Proceeds from sales of loans and leases	566,880	675,164
Loan and lease originations and purchases, net of principal collected	(674,459)	735,840
Proceeds from sales of other assets	82,970	58,879
Purchases of premises and equipment and lease equipment	(108,404)	(903,394)
Net cash acquired (paid) in business combination	975,014	0
Other, net	(6,743)	15,151
Net cash provided by (used in) investing activities	1,831,104	(206,749)
Cash flows from financing activities
Net change in deposits	(15,296)	163,442
Net change in short-term borrowings	(17,292)	2,451
Proceeds from long-term borrowings	2,799,986	7,043,458
Payments on long-term borrowings	(3,838,454)	(7,118,690)
Payments on liabilities related to acquisition and portfolio purchase	(1,000)	0
Redemption of Series B preferred stock	0	(100,000)
Repurchases of common stock	(58,804)	(149,912)
Common shares sold to TCF employee benefit plans	0	715
Dividends paid on preferred stock	(7,481)	(9,094)
Dividends paid on common stock	(102,368)	(74,916)
Exercise of stock options	0	(997)
Payments related to tax-withholding upon conversion of share-based awards	(5,813)	(6,563)
Net investment by (distribution to) non-controlling interest	(4,547)	(5,439)
Net cash provided by (used in) financing activities	(1,251,069)	(255,545)
Net change in cash and due from banks	735,957	(51,814)
Cash and cash equivalents at beginning of period	587,057	621,782
Cash and cash equivalents at end of period	1,323,014	569,968
Cash paid (received) for:
Interest on deposits and borrowings	192,793	99,336
Income taxes, net	10,367	(21,035)
Noncash activities:
Transfer of loans and leases to other assets	73,314	77,704
Transfer of loans and leases from held for investment to held for sale, net	$ 1,837,445	$ 644,488

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Operating Lease Right-of-Use Assets and Liabilities - Future Operating Lease Payments (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Leases [Abstract]
Remainder of 2019	$ 9,137
2020	32,687
2021	23,902
2022	18,624
2023	15,807
Thereafter	48,737
Total undiscounted future minimum operating lease payments	148,894
Discount	(13,751)
Total operating lease liabilities	$ 135,143

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Investments in Qualified Affordable Housing Projects, Federal Historical Projects and New Market Tax Credits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Remaining unfunded equity contributions	$ 128.1		$ 128.1		$ 56.2
Qualified Affordable Housing Projects
Schedule of Equity Method Investments [Line Items]
Amortization expense	3.6	$ 2.4	8.5	$ 7.2
Tax credits and other benefits	4.5	$ 2.9	10.5	$ 8.5
Remaining investment amount	231.4		231.4		$ 90.9
Federal Historical Projects
Schedule of Equity Method Investments [Line Items]
Remaining investment amount	$ 38.5		$ 38.5

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Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income
Interest and fees on loans and leases	$ 417,370	$ 269,167	$ 983,890	$ 806,935
Interest on investment securities:
Taxable	31,038	11,498	69,745	27,491
Tax-exempt	3,385	4,328	7,277	12,991
Interest on loans held-for-sale	1,408	3,625	2,832	5,281
Interest on other earning assets	6,607	3,089	13,739	8,722
Total interest income	459,808	291,707	1,077,483	861,420
Interest expense
Interest on deposits	70,900	27,479	149,154	74,228
Interest on borrowings	17,115	10,726	48,050	31,850
Total interest expense	88,015	38,205	197,204	106,078
Net interest income	371,793	253,502	880,279	755,342
Provision for credit losses	27,188	2,270	50,879	27,874
Net interest income after provision for credit losses	344,605	251,232	829,400	727,468
Noninterest income
Noninterest income	49,631	55,492	154,903	162,636
Net (losses) gains on sales of loans and leases	(5,984)	8,502	13,374	24,900
Net gains (losses) on investment securities	5,900	94	7,417	181
Other	(12,309)	6,243	(312)	20,620
Total noninterest income	94,258	112,064	307,480	330,529
Noninterest expense
Compensation and employee benefits	155,745	124,996	395,953	372,174
Occupancy and equipment	49,229	42,337	132,789	123,562
Lease financing equipment depreciation	19,408	19,525	57,797	54,744
Net foreclosed real estate and repossessed assets	2,203	3,880	9,281	12,654
Merger-related expenses	111,259	0	124,943	0
Other	87,776	55,685	194,781	201,308
Total noninterest expense	425,620	246,423	915,544	764,442
Income before income tax expense	13,243	116,873	221,336	293,555
Income tax (benefit) expense	(11,735)	28,034	28,866	66,083
Income after income tax (benefit) expense	24,978	88,839	192,470	227,472
Income attributable to non-controlling interest	2,830	2,643	9,401	8,766
Net income attributable to TCF Financial Corporation	22,148	86,196	183,069	218,706
Preferred stock dividends	2,494	2,494	7,481	9,094
Impact of preferred stock redemption	0	0	0	3,481
Net income available to common shareholders	$ 19,654	$ 83,702	$ 175,588	$ 206,131
Earnings per common share:
Basic earnings per common share (in usd per share)	$ 0.15	$ 1.00	$ 1.79	$ 2.44
Diluted earnings per common share (in usd per share)	$ 0.15	$ 1.00	$ 1.79	$ 2.43
Fees and service charges on deposit accounts
Noninterest income
Noninterest income	$ 34,384	$ 29,175	$ 88,504	$ 83,703
Leasing revenue
Noninterest income
Noninterest income	39,590	41,944	117,032	121,001
Wealth management revenue
Noninterest income
Noninterest income	4,241	0	4,241	0
Card and ATM revenue
Noninterest income
Noninterest income	23,315	20,074	62,470	58,313
Servicing fee revenue
Noninterest income
Noninterest income	$ 5,121	$ 6,032	$ 14,754	$ 21,811

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Operating Lease Right-of-Use Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Schedule of Undiscounted Future Minimum Leases Payments and a Reconciliation to the Amount Recorded as Operating Leases

Undiscounted future minimum operating lease payments and a reconciliation to the amount recorded as operating lease liabilities at September 30, 2019 were as follows:

(In thousands)
Remainder of 2019	$	9,137
2020	32,687
2021	23,902
2022	18,624
2023	15,807
Thereafter	48,737
Total undiscounted future minimum operating lease payments	148,894
Discount	(13,751		)
Total operating lease liabilities	$	135,143

Components of Total Lease Cost for Operating Leases

The components of total lease cost for operating leases, included in occupancy and equipment noninterest expense, were as follows:

	Three Months Ended			Nine Months Ended
(In thousands)	September 30, 2019
Lease expense	$	10,367		$	28,488
Short-term and variable lease cost	241			332
Sublease income	(447		)	(1,189		)
Total lease cost for operating leases	$	10,161		$	27,631

Supplemental cash flow information related to operating leases was as follows:

	Three Months Ended		Nine Months Ended
(In thousands)	September 30, 2019
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	395	$	118,100
Cash paid for amounts included in the measurement of lease liabilities - operating	8,807		23,841

The weighted-average discount rate and remaining lease term for operating leases were as follows:

	At September 30, 2019
Weighted-average discount rate	2.66	%
Weighted-average remaining lease term (years)	6.6

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Allowance for Loan and Lease Losses and Credit Quality (Tables)

9 Months Ended

Sep. 30, 2019

Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]

Rollforwards of the Allowance for Loan and Lease Losses

The rollforwards of the allowance for loan and lease losses were as follows:

(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	70,711		$	75,792		$	146,503
Charge-offs	(14,098		)	(21,449		)	(35,547		)
Recoveries	5,330			1,639			6,969
Net (charge-offs) recoveries	(8,768		)	(19,810		)	(28,578		)
Provision for credit losses	4,693			22,495			27,188
Other(1)	(23,849		)	(46		)	(23,895		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	91,241		$	74,378		$	165,619
Charge-offs	(15,942		)	(3,506		)	(19,448		)
Recoveries	11,711			947			12,658
Net (charge-offs) recoveries	(4,231		)	(2,559		)	(6,790		)
Provision for credit losses	(847		)	3,117			2,270
Other(1)	(299		)	(179		)	(478		)
Balance, end of period	$	85,864		$	74,757		$	160,621
(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	80,017		$	77,429		$	157,446
Charge-offs	(43,922		)	(37,122		)	(81,044		)
Recoveries	15,840			3,890			19,730
Net (charge-offs) recoveries	(28,082		)	(33,232		)	(61,314		)
Provision for credit losses	16,644			34,235			50,879
Other(1)	(25,792		)	(1		)	(25,793		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	98,085		$	72,956		$	171,041
Charge-offs	(48,120		)	(9,381		)	(57,501		)
Recoveries	21,299			2,491			23,790
Net (charge-offs) recoveries	(26,821		)	(6,890		)	(33,711		)
Provision for credit losses	18,872			9,002			27,874
Other(1)	(4,272		)	(311		)	(4,583		)
Balance, end of period	$	85,864		$	74,757		$	160,621

(1) Includes the transfer of the allowance for loan and lease losses to loans and leases held-for-sale (inclusive of the transfer of Legacy TCF auto loan portfolio for the three and nine months ended September 30, 2019).

Rollforwards of the Allowance for Loan and Lease Losses

The rollforwards of the allowance for loan and lease losses were as follows:

(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	70,711		$	75,792		$	146,503
Charge-offs	(14,098		)	(21,449		)	(35,547		)
Recoveries	5,330			1,639			6,969
Net (charge-offs) recoveries	(8,768		)	(19,810		)	(28,578		)
Provision for credit losses	4,693			22,495			27,188
Other(1)	(23,849		)	(46		)	(23,895		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	91,241		$	74,378		$	165,619
Charge-offs	(15,942		)	(3,506		)	(19,448		)
Recoveries	11,711			947			12,658
Net (charge-offs) recoveries	(4,231		)	(2,559		)	(6,790		)
Provision for credit losses	(847		)	3,117			2,270
Other(1)	(299		)	(179		)	(478		)
Balance, end of period	$	85,864		$	74,757		$	160,621
(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	80,017		$	77,429		$	157,446
Charge-offs	(43,922		)	(37,122		)	(81,044		)
Recoveries	15,840			3,890			19,730
Net (charge-offs) recoveries	(28,082		)	(33,232		)	(61,314		)
Provision for credit losses	16,644			34,235			50,879
Other(1)	(25,792		)	(1		)	(25,793		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	98,085		$	72,956		$	171,041
Charge-offs	(48,120		)	(9,381		)	(57,501		)
Recoveries	21,299			2,491			23,790
Net (charge-offs) recoveries	(26,821		)	(6,890		)	(33,711		)
Provision for credit losses	18,872			9,002			27,874
Other(1)	(4,272		)	(311		)	(4,583		)
Balance, end of period	$	85,864		$	74,757		$	160,621

(1) Includes the transfer of the allowance for loan and lease losses to loans and leases held-for-sale (inclusive of the transfer of Legacy TCF auto loan portfolio for the three and nine months ended September 30, 2019).

Allowance for Loan and Lease Losses and Balances by Type of Allowance Methodology

The allowance for loan and lease losses and loans and leases outstanding by type of allowance methodology were as follows:

	At September 30, 2019
(In thousands)	Consumer Loan Portfolio		Commercial Loan and Lease Portfolio		Total Loans and Leases
Allowance for loan and lease losses
Collectively evaluated for impairment	$	26,024	$	70,219	$	96,243
Individually evaluated for impairment	16,763		8,212		24,975
Total	$	42,787	$	78,431	$	121,218
Loans and leases outstanding
Collectively evaluated for impairment	$	11,016,429	$	21,956,151	$	32,972,580
Individually evaluated for impairment	132,900		111,559		244,459
PCI loans	79,737		213,976		293,713
Total	$	11,229,066	$	22,281,686	$	33,510,752

	At December 31, 2018
(In thousands)	Consumer Loan Portfolio		Commercial Loan and Lease Portfolio		Total Loans and Leases
Allowance for loan and lease losses
Collectively evaluated for impairment	$	57,113	$	68,140	$	125,253
Individually evaluated for impairment	22,904		9,289		32,193
Total	$	80,017	$	77,429	$	157,446
Loans and leases outstanding
Collectively evaluated for impairment	$	7,285,753	$	11,587,373	$	18,873,126
Individually evaluated for impairment	128,159		67,919		196,078
PCI loans	—		3,816		3,816
Total	$	7,413,912	$	11,659,108	$	19,073,020

Schedule of Accruing and Non-accruing Loans and Leases

TCF's accruing and nonaccrual loans and leases were as follows:

(In thousands)	Current		30-89 Days  Delinquent  and Accruing		90 Days or More Delinquent  and Accruing		Total  Accruing		Nonaccrual		Total
At September 30, 2019
Commercial loan and lease portfolio:
Commercial and industrial	$	10,615,519	$	49,595	$	2,241	$	10,667,355	$	55,039	$	10,722,394
Commercial real estate	8,677,350		39,023		8,054		8,724,427		26,518		8,750,945
Lease financing	2,551,326		29,123		2,421		2,582,870		11,503		2,594,373
Total commercial loan and lease portfolio	21,844,195		117,741		12,716		21,974,652		93,060		22,067,712
Consumer loan portfolio:
Residential mortgage	5,919,947		14,533		886		5,935,366		48,816		5,984,182
Consumer installment	1,557,320		3,667		6		1,560,993		636		1,561,629
Home equity	3,550,652		13,569		—		3,564,221		39,296		3,603,517
Total consumer loan portfolio	11,027,919		31,769		892		11,060,580		88,748		11,149,328
PCI loans(1)	261,082		16,578		16,052		293,712		—		293,712
Total	$	33,133,196	$	166,088	$	29,660	$	33,328,944	$	181,808	$	33,510,752
At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	6,176,341	$	13,653	$	760	$	6,190,754	$	26,061	$	6,216,815
Commercial real estate	2,903,795		—		—		2,903,795		4,518		2,908,313
Lease financing	2,498,811		21,477		1,882		2,522,170		7,993		2,530,163
Total commercial loan and lease portfolio	11,578,947		35,130		2,642		11,616,719		38,572		11,655,291
Consumer loan portfolio:
Residential mortgage	2,291,435		10,014		1,275		2,302,724		33,111		2,335,835
Consumer installment	1,951,302		40,340		3,349		1,994,991		8,581		2,003,572
Home equity	3,042,968		5,883		—		3,048,851		25,654		3,074,505
Total consumer loan portfolio	7,285,705		56,237		4,624		7,346,566		67,346		7,413,912
PCI loans(1)	3,639		—		178		3,817		—		3,817
Total	$	18,868,291	$	91,367	$	7,444	$	18,967,102	$	105,918	$	19,073,020

(1)

PCI loans that are not performing in accordance with contractual terms are not reported as nonaccrual because these loans were recorded at their net realizable value based on the principal and interest TCF expects to collect on these loans.

Financing Receivable Credit Quality Indicators

The following schedule presents the recorded investment of loans and leases by credit risk categories.

(In thousands)	Pass		Special Mention		Substandard		Doubtful		Total
At September 30, 2019
Commercial loan and lease portfolio:
Commercial and industrial	$	10,307,229	$	309,440	$	193,865	$	—	$	10,810,534
Commercial real estate	8,645,910		150,132		80,737		—		8,876,779
Lease financing	2,540,637		27,007		26,729		—		2,594,373
Total commercial loan and lease portfolio	21,493,776		486,579		301,331		—		22,281,686
Consumer loan portfolio:
Residential mortgage	6,001,380		1,543		54,481		—		6,057,404
Consumer installment	1,561,506		—		746		—		1,562,252
Home equity	3,565,763		1,284		42,363		—		3,609,410
Total consumer loan portfolio	11,128,649		2,827		97,590		—		11,229,066
Total loans and leases	$	32,622,425	$	489,406	$	398,921	$	—	$	33,510,752
At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	5,955,713	$	158,296	$	106,623	$	—	$	6,220,632
Commercial real estate	2,869,711		12,864		25,738		—		2,908,313
Lease financing	2,480,964		25,195		24,004		—		2,530,163
Total commercial loan and lease portfolio	11,306,388		196,355		156,365		—		11,659,108
Consumer loan portfolio:
Residential mortgage	2,294,740		3,606		37,489		—		2,335,835
Consumer installment	1,981,844		1,302		20,426		—		2,003,572
Home equity	3,043,296		3,747		27,462		—		3,074,505
Total consumer loan portfolio	7,319,880		8,655		85,377		—		7,413,912
Total loans and leases	$	18,626,268	$	205,010	$	241,742	$	—	$	19,073,020

Schedule of TDR Loans

The following table summarizes the TDR loans that defaulted during the periods presented that were modified during the respective reporting period or within one year of the beginning of the respective reporting period. TCF considers a loan to have defaulted when under the modified terms it becomes 90 or more days delinquent, has been transferred to nonaccrual status, has been charged down or has been transferred to other real estate owned or repossessed and returned assets.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Defaulted TDR loan balances modified during the applicable period
Commercial loan and lease portfolio:
Commercial and industrial	$	—	$	87	$	297	$	4,784
Total commercial loan and lease portfolio	—		87		297		4,784
Consumer loan portfolio:
Residential mortgage	212		778		964		2,556
Consumer installment	452		217		1,555		950
Home equity	82		176		328		435
Total consumer loan portfolio	746		1,171		2,847		3,941
Defaulted TDR loan balances	$	746	$	1,258	$	3,144	$	8,725

The following table presents the recorded investment of loan modifications first classified as TDRs during the periods presented:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2018				2019				2018
(In thousands)	Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment
Commercial loan and lease portfolio:
Commercial and industrial	$	—	$	—	$	11	$	11	$	—	$	—	$	11	$	11
Commercial real estate	—		—		—		—		31,518		31,518		5,228		5,228
Total commercial loan and lease portfolio	—		—		11		11		31,518		31,518		5,239		5,239
Consumer loan portfolio:
Residential mortgage	1,724		1,723		2,132		2,119		4,023		4,016		4,385		4,315
Home equity	1,115		1,115		983		983		3,589		3,577		1,792		1,790
Total consumer loan portfolio	2,839		2,838		3,115		3,102		7,612		7,593		6,177		6,105
Total	$	2,839	$	2,838	$	3,126	$	3,113	$	39,130	$	39,111	$	11,416	$	11,344

The following table presents TDR loans:

	At September 30, 2019						At December 31, 2018
(In thousands)	Accruing TDR Loans		Nonaccrual TDR Loans		Total TDR Loans		Accruing TDR Loans		Nonaccrual TDR Loans		Total TDR Loans
Commercial loan and lease portfolio	$	10,068	$	1,953	$	12,021	$	12,665	$	6,153	$	18,818
Consumer loan portfolio	75,836		19,284		95,120		85,794		22,554		108,348
Total	$	85,904	$	21,237	$	107,141	$	98,459	$	28,707	$	127,166

Information on Impaired Loans and Leases

Information on impaired loans and leases at September 30, 2019 and information on impaired loans at December 31, 2018 was as follows:

	At September 30, 2019						At December 31, 2018
(In thousands)	Unpaid Contractual Balance		Loan and Lease Balance		Related Allowance Recorded		Unpaid Contractual Balance		Loan Balance		Related Allowance Recorded
Impaired loans and leases with an allowance recorded:
Commercial loan and lease portfolio:
Commercial and industrial	$	27,748	$	24,775	$	5,151	$	35,444	$	32,326	$	6,354
Commercial real estate	4,257		3,922		330		4,905		4,474		1,108
Lease financing	11,503		11,503		2,731		—		—		—
Total commercial loan and lease portfolio	43,508		40,200		8,212		40,349		36,800		7,462
Consumer loan portfolio:
Residential mortgage	81,658		78,247		13,630		63,004		60,172		17,216
Consumer installment	—		—		—		919		647		81
Home equity	30,584		29,228		2,916		27,386		25,836		5,288
Total consumer loan portfolio	112,242		107,475		16,546		91,309		86,655		22,585
Total impaired loans and leases with an allowance recorded	155,750		147,675		24,758		131,658		123,455		30,047
Impaired loans and leases without an allowance recorded:
Commercial loan and lease portfolio:
Commercial and industrial	56,284		36,409		—		2,239		2,237		—
Commercial real estate	63,069		34,950		—		4,275		4,208		—
Total commercial loan and lease portfolio	119,353		71,359		—		6,514		6,445		—
Consumer loan portfolio:
Residential mortgage	27,420		19,370		—		11,636		9,494		—
Consumer installment	1,878		635		—		15,400		10,770		—
Home equity	16,771		5,420		—		10,620		1,429		—
Total consumer loan portfolio	46,069		25,425		—		37,656		21,693		—
Total impaired loans and leases without an allowance recorded	165,422		96,784		—		44,170		28,138		—
Total impaired loans and leases	$	321,172	$	244,459	$	24,758	$	175,828	$	151,593	$	30,047

The average balance of impaired loans and leases and interest income recognized on impaired loans and leases and the average loan balance of impaired loans and interest income recognized on impaired loans were as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2018				2019				2018
(In thousands)	Average Loan and Lease Balance		Interest Income Recognized		Average Loan Balance		Interest Income Recognized		Average Loan and Lease Balance		Interest Income Recognized		Average Loan Balance		Interest Income Recognized
Impaired loans and leases with an allowance recorded
Commercial loan and lease portfolio:
Commercial and industrial	$	22,845	$	3	$	22,917	$	49	$	28,551	$	32	$	15,213	$	251
Commercial real estate	4,175		51		5,192		—		4,198		120		5,929		—
Lease financing	12,195		55		—		—		5,751		117		8,552		—
Total commercial loan and lease portfolio	39,215		109		28,109		49		38,500		269		29,694		251
Consumer loan portfolio:
Residential mortgage	77,852		770		60,737		380		69,209		1,864		69,268		1,221
Consumer installment	289		—		454		—		324		—		713		—
Home equity	30,225		94		26,462		301		27,532		681		29,583		1,326
Total consumer loan portfolio	108,366		864		87,653		681		97,065		2,545		99,564		2,547
Total impaired loans and leases with an allowance recorded	$	147,581	$	973	$	115,762	$	730	$	135,565	$	2,814	$	129,258	$	2,798
Impaired loans and leases without an allowance recorded
Commercial loan and lease portfolio:
Commercial and industrial	$	20,448	$	37	$	403	$	31	$	19,323	$	129	$	1,510	$	136
Commercial real estate	39,222		437		4,315		58		19,579		1,087		4,385		174
Lease financing	—		—		—		—		—		—		—		—
Total commercial loan and lease portfolio	59,670		474		4,718		89		38,902		1,216		5,895		310
Consumer loan portfolio:
Residential mortgage	12,609		121		9,982		160		14,431		450		10,013		502
Consumer installment	6,476		83		8,757		77		5,703		256		8,630		211
Home equity	3,551		23		1,683		55		3,425		110		1,648		177
Total consumer loan portfolio	22,636		227		20,422		292		23,559		816		20,291		890
Total impaired loans and leases without an allowance recorded	82,306		701		25,140		381		62,461		2,032		26,186		1,200
Total impaired loans and leases	$	229,887	$	1,674	$	140,902	$	1,111	$	198,026	$	4,846	$	155,444	$	3,998

Schedule of Other Real Estate Owned and Repossessed and Returned Assets

Other real estate owned and repossessed and returned assets were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Other real estate owned	$	27,638	$	17,403
Repossessed and returned assets	14,598		14,574
Consumer loans in process of foreclosure	15,509		15,540

XML

Fair Values Measurements - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Loans held-for-sale	$ 114,831	$ 18,070
Derivative assets	135,242	8,268
Liabilities
Derivative liabilities	9,779	3,365
Interest rate contracts
Assets
Derivative assets	130,079	7,514
Liabilities
Derivative liabilities	8,811	3,337
Forward foreign exchange contracts
Assets
Derivative assets	0	102
Liabilities
Derivative liabilities	159	0
Interest rate lock commitments
Assets
Derivative assets	4,546	652
Liabilities
Derivative liabilities	105	28
Forward loan sales commitments
Assets
Derivative assets	0
Liabilities
Derivative liabilities	87
Power Equity CDs
Assets
Derivative assets	617
Liabilities
Derivative liabilities	617
Recurring
Assets
Investment securities carried at fair value	5,579,835	2,470,065
Loans held-for-sale	114,831	18,070
Interest-only strips	14,078	16,835
Derivative assets	137,394	15,250
Forward loan sales commitments	404	152
Assets held in trust for deferred compensation plans	40,784	33,217
Total assets at fair value	5,887,326	2,553,589
Liabilities
Derivative liabilities	103,564	4,356
Forward loan sales commitments	284	178
Liabilities held in trust for deferred compensation plans	40,784	33,217
Total liabilities at fair value	144,632	37,751
Recurring | Interest rate contracts
Assets
Derivative assets	130,391	7,909
Liabilities
Derivative liabilities	101,910	3,732
Recurring | Forward foreign exchange contracts
Assets
Derivative assets	1,666	6,689
Liabilities
Derivative liabilities	315	13
Recurring | Interest rate lock commitments
Assets
Derivative assets	4,554	652
Liabilities
Derivative liabilities	113	28
Recurring | Forward loan sales commitments
Assets
Derivative assets	166
Liabilities
Derivative liabilities	253
Recurring | Power Equity CDs
Assets
Derivative assets	617
Liabilities
Derivative liabilities	617
Recurring | Swap agreement
Liabilities
Derivative liabilities	356	583
Recurring | Level 1
Assets
Investment securities carried at fair value	0	0
Loans held-for-sale	0	0
Interest-only strips	0	0
Derivative assets	0	0
Forward loan sales commitments	0	0
Assets held in trust for deferred compensation plans	40,784	33,217
Total assets at fair value	40,784	33,217
Liabilities
Derivative liabilities	0	0
Forward loan sales commitments	0	0
Liabilities held in trust for deferred compensation plans	40,784	33,217
Total liabilities at fair value	40,784	33,217
Recurring | Level 1 | Interest rate contracts
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring | Level 1 | Forward foreign exchange contracts
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring | Level 1 | Interest rate lock commitments
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring | Level 1 | Forward loan sales commitments
Assets
Derivative assets	0
Liabilities
Derivative liabilities	0
Recurring | Level 1 | Power Equity CDs
Assets
Derivative assets	0
Liabilities
Derivative liabilities	0
Recurring | Level 1 | Swap agreement
Liabilities
Derivative liabilities	0	0
Recurring | Level 2
Assets
Investment securities carried at fair value	5,579,407	2,470,061
Loans held-for-sale	114,831	0
Interest-only strips	0	0
Derivative assets	137,394	14,598
Forward loan sales commitments	404	0
Assets held in trust for deferred compensation plans	0	0
Total assets at fair value	5,832,036	2,484,659
Liabilities
Derivative liabilities	103,208	3,745
Forward loan sales commitments	284	0
Liabilities held in trust for deferred compensation plans	0	0
Total liabilities at fair value	103,492	3,745
Recurring | Level 2 | Interest rate contracts
Assets
Derivative assets	130,391	7,909
Liabilities
Derivative liabilities	101,910	3,732
Recurring | Level 2 | Forward foreign exchange contracts
Assets
Derivative assets	1,666	6,689
Liabilities
Derivative liabilities	315	13
Recurring | Level 2 | Interest rate lock commitments
Assets
Derivative assets	4,554	0
Liabilities
Derivative liabilities	113	0
Recurring | Level 2 | Forward loan sales commitments
Assets
Derivative assets	166
Liabilities
Derivative liabilities	253
Recurring | Level 2 | Power Equity CDs
Assets
Derivative assets	617
Liabilities
Derivative liabilities	617
Recurring | Level 2 | Swap agreement
Liabilities
Derivative liabilities	0	0
Recurring | Level 3
Assets
Investment securities carried at fair value	428	4
Loans held-for-sale	0	18,070
Interest-only strips	14,078	16,835
Derivative assets	0	652
Forward loan sales commitments	0	152
Assets held in trust for deferred compensation plans	0	0
Total assets at fair value	14,506	35,713
Liabilities
Derivative liabilities	356	611
Forward loan sales commitments	0	178
Liabilities held in trust for deferred compensation plans	0	0
Total liabilities at fair value	356	789
Recurring | Level 3 | Interest rate contracts
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring | Level 3 | Forward foreign exchange contracts
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring | Level 3 | Interest rate lock commitments
Assets
Derivative assets	0	652
Liabilities
Derivative liabilities	0	28
Recurring | Level 3 | Forward loan sales commitments
Assets
Derivative assets	0
Liabilities
Derivative liabilities	0
Recurring | Level 3 | Power Equity CDs
Assets
Derivative assets	0
Liabilities
Derivative liabilities	0
Recurring | Level 3 | Swap agreement
Liabilities
Derivative liabilities	$ 356	$ 583

XML

Derivative Instruments - Derivatives Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Interest Rate Contract
Carrying amount of the hedged liability - Subordinated bank note - 2025	$ 153,307		$ 153,307		$ 144,296
Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged liability - Subordinated bank note - 2025	4,682		4,682		$ (4,165)
Gains and losses related to changes in the fair vale of the interest rate swap and hedged debt
Interest expense on borrowings	17,115	$ 10,726	48,050	$ 31,850
Summary of Net Investment Hedge Activity [Abstract]
Effect of net investment hedges on accumulated other comprehensive income	2,170	2,537	(3,761)	4,637
Derivatives designated as hedges | Interest expense - borrowings
Gains and losses related to changes in the fair vale of the interest rate swap and hedged debt
Gain (loss) of fair value hedge: Hedged item	(2,100)	1,206	(8,847)	6,337
Gain (loss) of fair value hedge: Derivative designated as a hedging instrument	(2,195)	1,165	(8,938)	6,621
Net income (expense) recognized on fair value hedge in interest expense on borrowings	95	41	91	(284)
Derivatives designated as hedges | Net investment hedges | Forward foreign exchange contracts
Summary of Net Investment Hedge Activity [Abstract]
Effect of net investment hedges on accumulated other comprehensive income	$ 2,170	$ (2,537)	$ (3,761)	$ 4,637

XML

Allowance for Loan and Lease Losses and Credit Quality - Balance Of Impaired Loans and Leases With and Without Allowances (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	$ 321,172		$ 321,172		$ 175,828
Loan and Lease Balance	244,459		244,459		151,593
Related Allowance Recorded	24,758		24,758		30,047
Average Loan and Lease Balance	229,887	$ 140,902	198,026	$ 155,444
Interest Income Recognized	1,674	1,111	4,846	3,998
Impaired Loans With Valuation Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	155,750		155,750		131,658
Loan and Lease Balance	147,675		147,675		123,455
Related Allowance Recorded	24,758		24,758		30,047
Average Loan and Lease Balance	147,581	115,762	135,565	129,258
Interest Income Recognized	973	730	2,814	2,798
Impaired Loans With Valuation Allowance | Commercial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	43,508		43,508		40,349
Loan and Lease Balance	40,200		40,200		36,800
Related Allowance Recorded	8,212		8,212		7,462
Average Loan and Lease Balance	39,215	28,109	38,500	29,694
Interest Income Recognized	109	49	269	251
Impaired Loans With Valuation Allowance | Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	27,748		27,748		35,444
Loan and Lease Balance	24,775		24,775		32,326
Related Allowance Recorded	5,151		5,151		6,354
Average Loan and Lease Balance	22,845	22,917	28,551	15,213
Interest Income Recognized	3	49	32	251
Impaired Loans With Valuation Allowance | Commercial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	4,257		4,257		4,905
Loan and Lease Balance	3,922		3,922		4,474
Related Allowance Recorded	330		330		1,108
Average Loan and Lease Balance	4,175	5,192	4,198	5,929
Interest Income Recognized	51	0	120	0
Impaired Loans With Valuation Allowance | Commercial | Lease financing
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	11,503		11,503		0
Loan and Lease Balance	11,503		11,503		0
Related Allowance Recorded	2,731		2,731		0
Average Loan and Lease Balance	12,195	0	5,751	8,552
Interest Income Recognized	55	0	117	0
Impaired Loans With Valuation Allowance | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	112,242		112,242		91,309
Loan and Lease Balance	107,475		107,475		86,655
Related Allowance Recorded	16,546		16,546		22,585
Average Loan and Lease Balance	108,366	87,653	97,065	99,564
Interest Income Recognized	864	681	2,545	2,547
Impaired Loans With Valuation Allowance | Consumer | Residential mortgage
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	81,658		81,658		63,004
Loan and Lease Balance	78,247		78,247		60,172
Related Allowance Recorded	13,630		13,630		17,216
Average Loan and Lease Balance	77,852	60,737	69,209	69,268
Interest Income Recognized	770	380	1,864	1,221
Impaired Loans With Valuation Allowance | Consumer | Consumer installment
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	0		0		919
Loan and Lease Balance	0		0		647
Related Allowance Recorded	0		0		81
Average Loan and Lease Balance	289	454	324	713
Interest Income Recognized	0	0	0	0
Impaired Loans With Valuation Allowance | Consumer | Home equity
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	30,584		30,584		27,386
Loan and Lease Balance	29,228		29,228		25,836
Related Allowance Recorded	2,916		2,916		5,288
Average Loan and Lease Balance	30,225	26,462	27,532	29,583
Interest Income Recognized	94	301	681	1,326
Impaired Loans With No Valuation Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	165,422		165,422		44,170
Loan and Lease Balance	96,784		96,784		28,138
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	82,306	25,140	62,461	26,186
Interest Income Recognized	701	381	2,032	1,200
Impaired Loans With No Valuation Allowance | Commercial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	119,353		119,353		6,514
Loan and Lease Balance	71,359		71,359		6,445
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	59,670	4,718	38,902	5,895
Interest Income Recognized	474	89	1,216	310
Impaired Loans With No Valuation Allowance | Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	56,284		56,284		2,239
Loan and Lease Balance	36,409		36,409		2,237
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	20,448	403	19,323	1,510
Interest Income Recognized	37	31	129	136
Impaired Loans With No Valuation Allowance | Commercial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	63,069		63,069		4,275
Loan and Lease Balance	34,950		34,950		4,208
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	39,222	4,315	19,579	4,385
Interest Income Recognized	437	58	1,087	174
Impaired Loans With No Valuation Allowance | Commercial | Lease financing
Financing Receivable, Impaired [Line Items]
Average Loan and Lease Balance	0	0	0	0
Interest Income Recognized	0	0	0	0
Impaired Loans With No Valuation Allowance | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	46,069		46,069		37,656
Loan and Lease Balance	25,425		25,425		21,693
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	22,636	20,422	23,559	20,291
Interest Income Recognized	227	292	816	890
Impaired Loans With No Valuation Allowance | Consumer | Residential mortgage
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	27,420		27,420		11,636
Loan and Lease Balance	19,370		19,370		9,494
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	12,609	9,982	14,431	10,013
Interest Income Recognized	121	160	450	502
Impaired Loans With No Valuation Allowance | Consumer | Consumer installment
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	1,878		1,878		15,400
Loan and Lease Balance	635		635		10,770
Related Allowance Recorded	0		0		0
Average Loan and Lease Balance	6,476	8,757	5,703	8,630
Interest Income Recognized	83	77	256	211
Impaired Loans With No Valuation Allowance | Consumer | Home equity
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	16,771		16,771		10,620
Loan and Lease Balance	5,420		5,420		1,429
Related Allowance Recorded	0		0		$ 0
Average Loan and Lease Balance	3,551	1,683	3,425	1,648
Interest Income Recognized	$ 23	$ 55	$ 110	$ 177

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Fair Values Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale	$ 114,831	$ 18,070
Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	5,579,835	2,470,065
Loans held-for-sale	114,831	18,070
Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	0	0
Loans held-for-sale	0	0
Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	5,579,407	2,470,061
Loans held-for-sale	114,831	0
Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	428	4
Loans held-for-sale	0	18,070
Carrying Amount | Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale	100,216	72,594
Net loans and leases	30,916,379	16,384,702
Loan servicing rights	55,301
Securitization receivable	19,624	19,432
Deferred fees on commitments to extend credit	18,485	18,555
Total financial instrument assets	31,544,243	16,735,789
Certificates of deposits	8,385,972	4,790,680
Long-term borrowings	860,482	1,449,472
Deferred fees on standby letters of credit	38	77
Total financial instrument liabilities	9,246,492	6,240,229
Carrying Amount | Recurring | FHLB and FRB stocks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	290,238	91,654
Carrying Amount | Recurring | Investment securities held-to-maturity
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	144,000	148,852
Estimated Fair Value | Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale	103,290	74,078
Net loans and leases	30,897,046	16,399,551
Loan servicing rights	55,301
Securitization receivable	19,355	19,025
Deferred fees on commitments to extend credit	18,485	18,555
Total financial instrument assets	31,533,643	16,752,130
Certificates of deposits	8,385,496	4,820,442
Long-term borrowings	875,864	1,451,550
Deferred fees on standby letters of credit	38	77
Total financial instrument liabilities	9,261,398	6,272,069
Estimated Fair Value | Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale	0	0
Net loans and leases	0	0
Loan servicing rights	0
Securitization receivable	0	0
Deferred fees on commitments to extend credit	0	0
Total financial instrument assets	0	0
Certificates of deposits	0	0
Long-term borrowings	0	0
Deferred fees on standby letters of credit	0	0
Total financial instrument liabilities	0	0
Estimated Fair Value | Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale	84,959	0
Net loans and leases	0	0
Loan servicing rights	0
Securitization receivable	0	0
Deferred fees on commitments to extend credit	18,485	18,555
Total financial instrument assets	539,934	256,676
Certificates of deposits	8,385,496	4,820,442
Long-term borrowings	875,864	1,451,550
Deferred fees on standby letters of credit	38	77
Total financial instrument liabilities	9,261,398	6,272,069
Estimated Fair Value | Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale	18,331	74,078
Net loans and leases	30,897,046	16,399,551
Loan servicing rights	55,301
Securitization receivable	19,355	19,025
Deferred fees on commitments to extend credit	0	0
Total financial instrument assets	30,993,709	16,495,454
Certificates of deposits	0	0
Long-term borrowings	0	0
Deferred fees on standby letters of credit	0	0
Total financial instrument liabilities	0	0
Estimated Fair Value | Recurring | FHLB and FRB stocks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	290,238	91,654
Estimated Fair Value | Recurring | FHLB and FRB stocks | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	0	0
Estimated Fair Value | Recurring | FHLB and FRB stocks | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	290,238	91,654
Estimated Fair Value | Recurring | FHLB and FRB stocks | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	0	0
Estimated Fair Value | Recurring | Investment securities held-to-maturity
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	149,928	149,267
Estimated Fair Value | Recurring | Investment securities held-to-maturity | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	0	0
Estimated Fair Value | Recurring | Investment securities held-to-maturity | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	146,252	146,467
Estimated Fair Value | Recurring | Investment securities held-to-maturity | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities carried at fair value	$ 3,676	$ 2,800

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Merger - Summary of Consideration (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 01, 2019	Jul. 31, 2019
Business Acquisition [Line Items]
Cash in lieu of fractional shares	$ 148
Purchase price consideration	3,018,556
Legacy TCF shareholders
Business Acquisition [Line Items]
Shares issued in acquisition		140,835,967
Share price (in usd per share)		$ 21.38
Chemical Financial Corporation stock option holders
Business Acquisition [Line Items]
Value of stock	7,335
Chemical Financial Corporation
Business Acquisition [Line Items]
Purchase price determination	$ 3,011,073

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Merger - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Combinations [Abstract]
Net interest income and other noninterest income	$ 536,165	$ 570,396	$ 1,654,571	$ 1,693,537
Net income	125,560	156,977	435,003	434,686
Net income available to common shareholders	$ 123,066	$ 154,483	$ 427,522	$ 422,111
Earnings per share:
Basic (in usd per share)	$ 0.81	$ 1.00	$ 2.79	$ 2.71
Diluted (in usd per share)	$ 0.81	$ 0.99	$ 2.77	$ 2.69

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Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	$ 229,167	$ 28,999
Accumulated amortization	(13,257)	(8,503)
Net carrying amount	215,910	20,496
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	180,837	3,049
Accumulated amortization	(6,372)	(2,502)
Net carrying amount	174,465	547
Program agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	14,700	14,700
Accumulated amortization	(868)	(408)
Net carrying amount	13,832	14,292
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	9,250	9,250
Accumulated amortization	(5,334)	(3,643)
Net carrying amount	3,916	5,607
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	24,380	2,000
Accumulated amortization	(683)	(1,950)
Net carrying amount	$ 23,697	$ 50

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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

Derivative instruments, recognized at fair value within other assets or other liabilities were as follows:

	At September 30, 2019
			Fair Value
(In thousands)	Notional Amount(1)		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments
Interest rate contract	$	150,000	$	—		$	11
Forward foreign exchange contracts	171,075		1,252			—
Total derivatives designated as hedging instruments	$	321,075	$	1,252		$	11
Derivatives not designated as hedging instruments
Interest rate contracts	$	4,694,964	$	130,391		$	101,899
Forward foreign exchange contracts	291,999		414			315
Interest rate lock commitments	266,949		4,554			113
Forward loan sales commitments	218,061		166			253
Power Equity CDs	31,870		617			617
Swap agreement	12,644		—			356
Total derivatives not designated as hedging instruments	$	5,516,487	$	136,142		$	103,553
Total derivatives before netting	$	5,837,562	137,394			103,564
Netting(2)			(2,152		)	(93,785		)
Total derivatives, net			$	135,242		$	9,779

	At December 31, 2018
			Fair Value
(In thousands)	Notional Amount(1)		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments
Interest rate contract	$	150,000	$	393		$	—
Forward foreign exchange contracts	157,271		2,980			—
Total derivatives designated as hedging instruments	$	307,271	$	3,373		$	—
Derivatives not designated as hedging instruments
Interest rate contracts	$	1,095,449	$	7,516		$	3,732
Forward foreign exchange contracts	254,274		3,709			13
Interest rate lock commitments	28,007		652			28
Swap agreement	13,020		—			583
Total derivatives not designated as hedging instruments	$	1,390,750	$	11,877		$	4,356
Total derivatives before netting			15,250			4,356
Netting(2)			(6,982		)	(991		)
Total derivatives, net			$	8,268		$	3,365

(1) Notional or contract amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the Consolidated Statements of Financial Condition.

(2) Includes netting of derivative asset and liability balances and related cash collateral, where counterparty netting agreements are in place.

Schedule of Gross Amounts Recognized, Gross Amounts Offset and Net Amount Presented

The gross amounts recognized, gross amounts offset and net amount presented of derivative instruments were as follows:

	At September 30, 2019
(In thousands)	Gross Amounts Recognized		Gross Amounts  Offset(1)			Net Amount Presented
Derivative assets
Interest rate contracts	$	130,391	$	(312	)	$	130,079
Forward foreign exchange contracts	1,666		(1,666		)	—
Interest rate lock commitments	4,554		(8		)	4,546
Forward loan sales commitments	166		(166		)	—
Power Equity CDs	617		—			617
Total derivative assets	$	137,394	$	(2,152	)	$	135,242
Derivative liabilities
Interest rate contracts	$	101,910	$	(93,099	)	$	8,811
Forward foreign exchange contracts	315		(156		)	159
Interest rate lock commitments	113		(8		)	105
Forward loan sales commitments	253		(166		)	87
Power Equity CDs	617		—			617
Other contracts	356		(356		)	—
Total derivative liabilities	$	103,564	$	(93,785	)	$	9,779

	At December 31, 2018
(In thousands)	Gross Amounts Recognized		Gross Amounts Offset(1)			Net Amount Presented
Derivative assets
Interest rate contracts	$	7,909	$	(395	)	$	7,514
Forward foreign exchange contracts	6,689		(6,587		)	102
Interest rate lock commitments	652		—			652
Total derivative assets	$	15,250	$	(6,982	)	$	8,268
Derivative liabilities
Interest rate contracts	$	3,732	$	(395	)	$	3,337
Forward foreign exchange contracts	13		(13		)	—
Interest rate lock commitments	28		—			28
Swap agreement	583		(583		)	—
Total derivative liabilities	$	4,356	$	(991	)	$	3,365

(1)

Includes the amounts with counterparties subject to enforceable master netting arrangements that have been offset in the Consolidated Statements of Financial Condition.

Amounts Recorded in the Consolidated Statements of Financial Condition Related to the Cumulative Basis Adjustment for the Fair Value Hedge

The carrying amount of the hedged subordinated debt, including the cumulative basis adjustment related to the application of fair value hedge accounting, is recorded in long-term borrowings on the Consolidated Statements of Financial Condition and was as follows:

	Carrying Amount  of the Hedged Liability				Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Liability
(In thousands)	At September 30, 2019		At December 31, 2018		At September 30, 2019		At December 31, 2018
Subordinated bank note - 2025	$	153,307	$	144,296	$	4,682	$	(4,165	)

Summary of Gains and Losses Related to the Fair Value Hedge of the Interest Rate Swap and the Offsetting Changes in the Fair Value of the Hedged Debt

The following table summarizes the effect of fair value hedge accounting on the Consolidated Statements of Income for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Statement of income line where the gain (loss) on the fair value hedge was recorded:
Interest expense on borrowings	$	17,115		$	10,726		$	48,050		$	31,850
Gain (loss) on interest rate contract (fair value hedge)
Hedged item	$	(2,100	)	$	1,206		$	(8,847	)	$	6,337
Derivative designated as a hedging instrument	2,195			(1,165		)	8,938			(6,621		)
Net income (expense) recognized on fair value hedge in interest expense on borrowings	$	95		$	41		$	91		$	(284	)

Effect of Net Investment Hedges on Accumulated Other Comprehensive Income

The effect of net investment hedges on accumulated other comprehensive income was as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands)	2019		2018			2019			2018
Forward foreign exchange contracts	$	2,170	$	(2,537	)	$	(3,761	)	$	4,637

Summary of Effects of Derivatives not Designated as Hedging Instruments on the Consolidated Statements of Income

Certain other interest rate contracts, forward foreign exchange contracts, interest rate lock commitments, Power Equity CDs and other contracts have not been designated as hedging instruments. The effect of these derivatives on the Consolidated Statements of Income was as follows:

		Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	Location of Gain (Loss)	2019			2018			2019			2018
Interest rate contracts(1)	Other noninterest income	$	(19,764	)	$	51		$	(21,307	)	$	157
Forward foreign exchange contracts	Other noninterest expense	3,307			(3,706		)	(5,302		)	8,050
Interest rate lock commitments	Net (losses) gains on sales of loans and leases	337			(244		)	1,117			798
Forward loan sales commitments	Net (losses) gains on sales of loans and leases	(11		)	—			(11		)	—
Swap agreement	Other noninterest income	4			(292		)	4			(274		)
Net gain (loss) recognized		$	(16,127	)	$	(4,191	)	$	(25,499	)	$	8,731

(1)

Included in both the three and nine months ended September 30, 2019 is a loss of $17.3 million related to the termination of $1.1 billion of interest rate swaps.

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Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost Included in Non-interest Expense for the TCF Cash Balance Pension Plan and Postretirement Plan

The net periodic benefit plan (income) cost for defined benefit pension plans and postretirement benefit plans were as follows:

	Defined Benefit Pension Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Interest cost	$	1,046		$	246		$	1,574		$	738
Service cost	—			—			—			—
Contractual termination cost	—			—			—			—
Return on plan assets	(949		)	(133		)	(1,223		)	(397		)
Amortization of prior service credit	—			—			—			—
Amortization of unrecognized net loss	—			—			—			—
Recognized actuarial (gain) loss	—			—			—			—
Net periodic benefit plan (income) cost	$	97		$	113		$	351		$	341

	Postretirement Benefit Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2019			2018			2019			2018
Interest cost	$	41		$	28		$	101		$	83
Service cost	—			—			—			—
Recognized actuarial (gain) loss	—			—			—			—
Amortization of prior service cost	(11		)	(12		)	(35		)	(35		)
Amortization of unrecognized net loss	—			—			—			—
Net periodic benefit plan (income) cost	$	30		$	16		$	66		$	48

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Regulatory Capital Requirements - Summary of Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
TCF
Regulatory Capital:
Common equity Tier 1 capital	$ 4,009,214	$ 2,224,183
Tier 1 capital	4,197,706	2,408,393
Total capital	$ 4,652,708	$ 2,750,581
Common equity Tier 1 capital ratio
Common equity Tier 1 capital - actual, ratio	10.88%	10.82%
Risk-based capital ratios
Tier 1 risk-based capital - actual, ratio	11.40%	11.72%
Total risk-based capital - actual, ratio	12.63%	13.38%
Tier 1 leverage ratio
Tier 1 leverage - actual, ratio	11.16%	10.44%
TCF Bank
Regulatory Capital:
Common equity Tier 1 capital	$ 3,991,895	$ 2,282,013
Tier 1 capital	4,015,208	2,300,472
Total capital	$ 4,487,968	$ 2,675,347
Common equity Tier 1 capital ratio
Common equity Tier 1 capital - actual, ratio	10.85%	11.10%
Common equity Tier 1 capital - well-capitalized capital requirement, ratio	6.50%
Common equity Tier 1 capital - minimum capital requirement, ratio	7.00%
Risk-based capital ratios
Tier 1 risk-based capital - actual, ratio	10.91%	11.19%
Tier 1 risk-based capital - well-capitalized capital requirement, ratio	8.00%
Tier 1 risk-based capital - minimum capital requirement, ratio	8.50%
Total risk-based capital - actual, ratio	12.20%	13.01%
Total risk-based capital - well-capitalized capital requirement, ratio	10.00%
Total risk-based capital - minimum capital requirement, ratio	10.50%
Tier 1 leverage ratio
Tier 1 leverage - actual, ratio	10.68%	9.97%
Tier 1 leverage - well-capitalized capital requirement, ratio	5.00%
Tier 1 leverage - minimum capital requirement, ratio	4.00%

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Borrowings - Long-term Borrowings Narrative (Details) - USD ($)	Jul. 02, 2024	Aug. 01, 2019	Sep. 30, 2019	Jul. 02, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
FHLB advances			$ 322,674,000		$ 1,100,000,000
Debt Instrument [Line Items]
Debt assumed in merger		$ 442,323,000
Federal Home Loan Bank Advances, Maturity 2020
Debt Instrument [Line Items]
FHLB interest rate			1.30%
Federal Home Loan Bank Advances, Maturity 2025
Debt Instrument [Line Items]
FHLB interest rate			2.72%
Subordinated Debt
Debt Instrument [Line Items]
Debt assumed in merger		19,000,000.0
Subordinated Debt | Subordinated Bank Notes Due 2032
Debt Instrument [Line Items]
Debt assumed in merger		$ 5,600,000
Subordinated Debt | Subordinated Bank Notes Due 2032 | Three-Month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		3.25%
Subordinated Debt | Subordinated Bank Notes Due 2034 and 2035
Debt Instrument [Line Items]
Debt assumed in merger		$ 13,400,000
Subordinated Debt | Subordinated Bank Notes Due 2034 | Three-Month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.45%
Subordinated Debt | Subordinated Bank Notes Due 2035 | Three-Month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.85%
Subordinated Debt | 2029 Notes
Debt Instrument [Line Items]
Issuance amount				$ 150,000,000.0
Stated rate				4.13%
Issuance costs			$ 1,500,000
Forecast | Subordinated Debt | 2029 Notes | Three-Month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.375%

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Commitments, Contingent Liabilities and Guarantees (Tables)

9 Months Ended

Sep. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Financial Instruments with Off-Balance Sheet Risk

Financial instruments with off-balance sheet risk were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Commitments to extend credit:
Commercial	$	5,269,843	$	1,280,707
Consumer	2,266,913		1,627,960
Total commitments to extend credit	7,536,756		2,908,667
Standby letters of credit and guarantees on industrial revenue bonds	125,438		20,662
Total	$	7,662,194	$	2,929,329

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Allowance for Loan and Lease Losses and Credit Quality - Recorded Investment by Credit Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	$ 33,510,752	$ 19,073,020
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	22,281,686	11,659,108
Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	10,810,534	6,220,632
Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	8,876,779	2,908,313
Commercial | Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	2,594,373	2,530,163
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	11,229,066	7,413,912
Consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	6,057,404	2,335,835
Consumer | Consumer installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	1,562,252	2,003,572
Consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	3,609,410	3,074,505
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	32,622,425	18,626,268
Pass | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	21,493,776	11,306,388
Pass | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	10,307,229	5,955,713
Pass | Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	8,645,910	2,869,711
Pass | Commercial | Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	2,540,637	2,480,964
Pass | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	11,128,649	7,319,880
Pass | Consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	6,001,380	2,294,740
Pass | Consumer | Consumer installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	1,561,506	1,981,844
Pass | Consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	3,565,763	3,043,296
Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	489,406	205,010
Special Mention | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	486,579	196,355
Special Mention | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	309,440	158,296
Special Mention | Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	150,132	12,864
Special Mention | Commercial | Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	27,007	25,195
Special Mention | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	2,827	8,655
Special Mention | Consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	1,543	3,606
Special Mention | Consumer | Consumer installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	1,302
Special Mention | Consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	1,284	3,747
Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	398,921	241,742
Substandard | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	301,331	156,365
Substandard | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	193,865	106,623
Substandard | Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	80,737	25,738
Substandard | Commercial | Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	26,729	24,004
Substandard | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	97,590	85,377
Substandard | Consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	54,481	37,489
Substandard | Consumer | Consumer installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	746	20,426
Substandard | Consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	42,363	27,462
Doubtful
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Commercial | Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Consumer | Consumer installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	0	0
Doubtful | Consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and leases	$ 0	$ 0

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Loans and Leases - Components of Net Investment in Direct Financing and Sales-type Leases (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Receivables [Abstract]
Carrying amount	$ 2,682,097
Unguaranteed residual assets	148,669
Net direct fees and costs and unearned income	(236,393)
Total net investment in sales-type and direct financing leases	$ 2,594,373

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Investment Securities - Realized Gains (Losses) On Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 7,717	$ 0	$ 10,872	$ 0
Gross realized losses	1,849	0	3,491	0
Recoveries on previously impaired investment securities held-to-maturity	32	94	36	181
Net gains (losses) on investment securities	$ 5,900	$ 94	$ 7,417	$ 181

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Commitments, Contingent Liabilities and Guarantees - Off-Balance Sheet Risks (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks	$ 7,662,194	$ 2,929,329
Total commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks	7,536,756	2,908,667
Standby letters of credit and guarantees on industrial revenue bonds
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks	125,438	20,662
Commercial | Total commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks	5,269,843	1,280,707
Consumer | Total commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks	$ 2,266,913	$ 1,627,960

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Loans and Leases - Interest-only Strips and Contractual Liabilities Related to Loan Sales (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Interest-only strips related to loan sales	$ 14,078	$ 16,835

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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue out of scope of ASC 606	$ (3,281)	$ 4,405	$ 2,392	$ (21,173)
Noninterest income	49,631	55,492	154,903	162,636
Noninterest expense out of scope of ASC 606	2,582	3,724	8,897	12,043
Noninterest expense	2,203	3,880	9,281	12,654
Fees and service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenue out of scope of ASC 606	3,878	38	3,902	98
Noninterest income	34,384	29,175	88,504	83,703
Wealth management revenue
Disaggregation of Revenue [Line Items]
Revenue out of scope of ASC 606	3,194	0	3,194	0
Noninterest income	4,241	0	4,241	0
Card and ATM revenue
Disaggregation of Revenue [Line Items]
Revenue out of scope of ASC 606	1,816	61	1,827	179
Noninterest income	23,315	20,074	62,470	58,313
Other noninterest income
Disaggregation of Revenue [Line Items]
Revenue out of scope of ASC 606	(12,169)	4,306	(6,531)	(21,450)
Noninterest income	(12,309)	6,243	(312)	20,620
Consumer Banking
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	51,858	47,954	144,230	172,292
Noninterest expense within the scope of ASC 606	(593)	215	(152)	719
Consumer Banking | Fees and service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	29,198	28,055	81,098	80,468
Consumer Banking | Wealth management revenue
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	1,047	0	1,047	0
Consumer Banking | Card and ATM revenue
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	21,476	19,999	60,581	58,095
Consumer Banking | Other noninterest income
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	137	(100)	1,504	33,729
Commercial Banking
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	(1,556)	(1,553)	(1,705)	(3,595)
Noninterest expense within the scope of ASC 606	214	(59)	536	(108)
Commercial Banking | Fees and service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	1,308	1,082	3,504	3,137
Commercial Banking | Wealth management revenue
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	0	0	0	0
Commercial Banking | Card and ATM revenue
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	23	14	62	39
Commercial Banking | Other noninterest income
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	(2,887)	(2,649)	(5,271)	(6,771)
Enterprise Services
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	2,610	4,686	9,986	15,112
Noninterest expense within the scope of ASC 606	0	0	0	0
Enterprise Services | Fees and service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	0	0	0	0
Enterprise Services | Wealth management revenue
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	0	0	0	0
Enterprise Services | Card and ATM revenue
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	0	0	0	0
Enterprise Services | Other noninterest income
Disaggregation of Revenue [Line Items]
Revenues within the scope of 606	$ 2,610	$ 4,686	$ 9,986	$ 15,112

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Retirement Plans - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Maximum percent of eligible compensation for 401k plan			6.00%
Company contributions to 401k Plans	$ 4,300,000	$ 2,500,000	$ 11,400,000	$ 9,700,000
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.48%		3.48%
Weighted-average interest crediting rate	2.24%		2.24%
Company contributions to defined benefit plans	$ 0	0	$ 0	0
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Company contributions to defined benefit plans	$ 100,000	$ 100,000	$ 300,000	$ 300,000

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Cash and Cash Equivalents

9 Months Ended

Sep. 30, 2019

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

Cash and Cash Equivalents

At September 30, 2019 and December 31, 2018, TCF Bank was required by Federal Reserve regulations to maintain reserves of $149.6 million and $106.2 million, respectively, in cash on hand or at the Federal Reserve Bank.

TCF maintains cash balances that are restricted as to their use in accordance with certain obligations. Cash payments received on loans serviced for third parties are generally held in separate accounts until remitted. TCF may also retain cash balances for collateral on certain borrowings and derivatives. TCF maintained restricted cash totaling $72.7 million and $38.3 million at September 30, 2019 and December 31, 2018, respectively.

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Allowance for Loan and Lease Losses and Credit Quality

9 Months Ended

Sep. 30, 2019

Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]

Allowance for Loan and Lease Losses and Credit Quality

Allowance for Loan and Lease Losses and Credit Quality

Allowance for Loan and Lease Losses The rollforwards of the allowance for loan and lease losses were as follows:

(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Three Months Ended September 30, 2019
Balance, beginning of period	$	70,711		$	75,792		$	146,503
Charge-offs	(14,098		)	(21,449		)	(35,547		)
Recoveries	5,330			1,639			6,969
Net (charge-offs) recoveries	(8,768		)	(19,810		)	(28,578		)
Provision for credit losses	4,693			22,495			27,188
Other(1)	(23,849		)	(46		)	(23,895		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Three Months Ended September 30, 2018
Balance, beginning of period	$	91,241		$	74,378		$	165,619
Charge-offs	(15,942		)	(3,506		)	(19,448		)
Recoveries	11,711			947			12,658
Net (charge-offs) recoveries	(4,231		)	(2,559		)	(6,790		)
Provision for credit losses	(847		)	3,117			2,270
Other(1)	(299		)	(179		)	(478		)
Balance, end of period	$	85,864		$	74,757		$	160,621
(In thousands)	Consumer Loan Portfolio			Commercial Loan and Lease Portfolio			Total Loans and Leases
At or For the Nine Months Ended September 30, 2019
Balance, beginning of period	$	80,017		$	77,429		$	157,446
Charge-offs	(43,922		)	(37,122		)	(81,044		)
Recoveries	15,840			3,890			19,730
Net (charge-offs) recoveries	(28,082		)	(33,232		)	(61,314		)
Provision for credit losses	16,644			34,235			50,879
Other(1)	(25,792		)	(1		)	(25,793		)
Balance, end of period	$	42,787		$	78,431		$	121,218
At or For the Nine Months Ended September 30, 2018
Balance, beginning of period	$	98,085		$	72,956		$	171,041
Charge-offs	(48,120		)	(9,381		)	(57,501		)
Recoveries	21,299			2,491			23,790
Net (charge-offs) recoveries	(26,821		)	(6,890		)	(33,711		)
Provision for credit losses	18,872			9,002			27,874
Other(1)	(4,272		)	(311		)	(4,583		)
Balance, end of period	$	85,864		$	74,757		$	160,621

(1) Includes the transfer of the allowance for loan and lease losses to loans and leases held-for-sale (inclusive of the transfer of Legacy TCF auto loan portfolio for the three and nine months ended September 30, 2019).

The allowance for loan and lease losses and loans and leases outstanding by type of allowance methodology were as follows:

	At September 30, 2019
(In thousands)	Consumer Loan Portfolio		Commercial Loan and Lease Portfolio		Total Loans and Leases
Allowance for loan and lease losses
Collectively evaluated for impairment	$	26,024	$	70,219	$	96,243
Individually evaluated for impairment	16,763		8,212		24,975
Total	$	42,787	$	78,431	$	121,218
Loans and leases outstanding
Collectively evaluated for impairment	$	11,016,429	$	21,956,151	$	32,972,580
Individually evaluated for impairment	132,900		111,559		244,459
PCI loans	79,737		213,976		293,713
Total	$	11,229,066	$	22,281,686	$	33,510,752

	At December 31, 2018
(In thousands)	Consumer Loan Portfolio		Commercial Loan and Lease Portfolio		Total Loans and Leases
Allowance for loan and lease losses
Collectively evaluated for impairment	$	57,113	$	68,140	$	125,253
Individually evaluated for impairment	22,904		9,289		32,193
Total	$	80,017	$	77,429	$	157,446
Loans and leases outstanding
Collectively evaluated for impairment	$	7,285,753	$	11,587,373	$	18,873,126
Individually evaluated for impairment	128,159		67,919		196,078
PCI loans	—		3,816		3,816
Total	$	7,413,912	$	11,659,108	$	19,073,020

Accruing and Nonaccrual Loans and Leases TCF's key credit quality indicator is the receivable's payment performance status, defined as accruing or not accruing. Nonaccrual loans and leases are those which management believes have a higher risk of loss. Delinquent balances are determined based on the contractual terms of the loan or lease. Loans and leases that are over 90 days delinquent are a leading indicator for future charge-off trends and are generally placed on nonaccrual status. TCF's accruing and nonaccrual loans and leases were as follows:

(In thousands)	Current		30-89 Days  Delinquent  and Accruing		90 Days or More Delinquent  and Accruing		Total  Accruing		Nonaccrual		Total
At September 30, 2019
Commercial loan and lease portfolio:
Commercial and industrial	$	10,615,519	$	49,595	$	2,241	$	10,667,355	$	55,039	$	10,722,394
Commercial real estate	8,677,350		39,023		8,054		8,724,427		26,518		8,750,945
Lease financing	2,551,326		29,123		2,421		2,582,870		11,503		2,594,373
Total commercial loan and lease portfolio	21,844,195		117,741		12,716		21,974,652		93,060		22,067,712
Consumer loan portfolio:
Residential mortgage	5,919,947		14,533		886		5,935,366		48,816		5,984,182
Consumer installment	1,557,320		3,667		6		1,560,993		636		1,561,629
Home equity	3,550,652		13,569		—		3,564,221		39,296		3,603,517
Total consumer loan portfolio	11,027,919		31,769		892		11,060,580		88,748		11,149,328
PCI loans(1)	261,082		16,578		16,052		293,712		—		293,712
Total	$	33,133,196	$	166,088	$	29,660	$	33,328,944	$	181,808	$	33,510,752
At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	6,176,341	$	13,653	$	760	$	6,190,754	$	26,061	$	6,216,815
Commercial real estate	2,903,795		—		—		2,903,795		4,518		2,908,313
Lease financing	2,498,811		21,477		1,882		2,522,170		7,993		2,530,163
Total commercial loan and lease portfolio	11,578,947		35,130		2,642		11,616,719		38,572		11,655,291
Consumer loan portfolio:
Residential mortgage	2,291,435		10,014		1,275		2,302,724		33,111		2,335,835
Consumer installment	1,951,302		40,340		3,349		1,994,991		8,581		2,003,572
Home equity	3,042,968		5,883		—		3,048,851		25,654		3,074,505
Total consumer loan portfolio	7,285,705		56,237		4,624		7,346,566		67,346		7,413,912
PCI loans(1)	3,639		—		178		3,817		—		3,817
Total	$	18,868,291	$	91,367	$	7,444	$	18,967,102	$	105,918	$	19,073,020

(1) PCI loans that are not performing in accordance with contractual terms are not reported as nonaccrual because these loans were recorded at their net realizable value based on the principal and interest TCF expects to collect on these loans.

In addition to the receivables payment performance status, credit quality is also analyzed using risk categories, which vary based on the size and type of credit risk exposure and additionally measure liquidity, debt capacity, coverage and payment behavior as shown in the borrower's financial statements. The risk categories also measure the quality of the borrower's management and the repayment support offered by any guarantors. Loan and lease credit classifications are derived from standard regulatory rating definitions, which include: pass, special mention, substandard, doubtful and loss. Substandard and doubtful loans and leases have well-defined weaknesses, but may never result in a loss.

The following schedule presents the recorded investment of loans and leases by credit risk categories.

(In thousands)	Pass		Special Mention		Substandard		Doubtful		Total
At September 30, 2019
Commercial loan and lease portfolio:
Commercial and industrial	$	10,307,229	$	309,440	$	193,865	$	—	$	10,810,534
Commercial real estate	8,645,910		150,132		80,737		—		8,876,779
Lease financing	2,540,637		27,007		26,729		—		2,594,373
Total commercial loan and lease portfolio	21,493,776		486,579		301,331		—		22,281,686
Consumer loan portfolio:
Residential mortgage	6,001,380		1,543		54,481		—		6,057,404
Consumer installment	1,561,506		—		746		—		1,562,252
Home equity	3,565,763		1,284		42,363		—		3,609,410
Total consumer loan portfolio	11,128,649		2,827		97,590		—		11,229,066
Total loans and leases	$	32,622,425	$	489,406	$	398,921	$	—	$	33,510,752
At December 31, 2018
Commercial loan and lease portfolio:
Commercial and industrial	$	5,955,713	$	158,296	$	106,623	$	—	$	6,220,632
Commercial real estate	2,869,711		12,864		25,738		—		2,908,313
Lease financing	2,480,964		25,195		24,004		—		2,530,163
Total commercial loan and lease portfolio	11,306,388		196,355		156,365		—		11,659,108
Consumer loan portfolio:
Residential mortgage	2,294,740		3,606		37,489		—		2,335,835
Consumer installment	1,981,844		1,302		20,426		—		2,003,572
Home equity	3,043,296		3,747		27,462		—		3,074,505
Total consumer loan portfolio	7,319,880		8,655		85,377		—		7,413,912
Total loans and leases	$	18,626,268	$	205,010	$	241,742	$	—	$	19,073,020

Troubled Debt Restructurings In certain circumstances, TCF may consider modifying the terms of a loan for economic or legal reasons related to the customer's financial difficulties. If TCF grants a concession, the modified loan is classified as a troubled debt restructuring ("TDR"). TDRs typically involve a deferral of the principal balance of the loan, a reduction of the stated interest rate of the loan or, in certain limited circumstances, a reduction of the principal balance of the loan or the loan's accrued interest. All loans classified as TDR loans are considered to be impaired.

The following table presents the recorded investment of loan modifications first classified as TDRs during the periods presented:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2018				2019				2018
(In thousands)	Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment		Pre-modification Investment		Post-modification Investment
Commercial loan and lease portfolio:
Commercial and industrial	$	—	$	—	$	11	$	11	$	—	$	—	$	11	$	11
Commercial real estate	—		—		—		—		31,518		31,518		5,228		5,228
Total commercial loan and lease portfolio	—		—		11		11		31,518		31,518		5,239		5,239
Consumer loan portfolio:
Residential mortgage	1,724		1,723		2,132		2,119		4,023		4,016		4,385		4,315
Home equity	1,115		1,115		983		983		3,589		3,577		1,792		1,790
Total consumer loan portfolio	2,839		2,838		3,115		3,102		7,612		7,593		6,177		6,105
Total	$	2,839	$	2,838	$	3,126	$	3,113	$	39,130	$	39,111	$	11,416	$	11,344

The following table presents TDR loans:

	At September 30, 2019						At December 31, 2018
(In thousands)	Accruing TDR Loans		Nonaccrual TDR Loans		Total TDR Loans		Accruing TDR Loans		Nonaccrual TDR Loans		Total TDR Loans
Commercial loan and lease portfolio	$	10,068	$	1,953	$	12,021	$	12,665	$	6,153	$	18,818
Consumer loan portfolio	75,836		19,284		95,120		85,794		22,554		108,348
Total	$	85,904	$	21,237	$	107,141	$	98,459	$	28,707	$	127,166

Commitments to lend additional funds to borrowers whose terms have been modified in TDRs were $0.5 million and $0.6 million at September 30, 2019 and December 31, 2018, respectively.

Loan modifications to troubled borrowers are no longer disclosed as TDR loans in the calendar years after modification if the loans were modified to an interest rate equal to or greater than the yields of new loan originations with comparable risk at the time of restructuring and if the loan is performing based on the restructured terms; however, these loans are still considered impaired and follow TCF's impaired loan reserve policies.

The following table summarizes the TDR loans that defaulted during the periods presented that were modified during the respective reporting period or within one year of the beginning of the respective reporting period. TCF considers a loan to have defaulted when under the modified terms it becomes 90 or more days delinquent, has been transferred to nonaccrual status, has been charged down or has been transferred to other real estate owned or repossessed and returned assets.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Defaulted TDR loan balances modified during the applicable period
Commercial loan and lease portfolio:
Commercial and industrial	$	—	$	87	$	297	$	4,784
Total commercial loan and lease portfolio	—		87		297		4,784
Consumer loan portfolio:
Residential mortgage	212		778		964		2,556
Consumer installment	452		217		1,555		950
Home equity	82		176		328		435
Total consumer loan portfolio	746		1,171		2,847		3,941
Defaulted TDR loan balances	$	746	$	1,258	$	3,144	$	8,725

Impaired Loans and Leases  Effective January 1, 2019, in conjunction with the adoption of ASU No. 2016-02, Leases (Topic 842) and related ASUs, TCF considers impaired loans and leases to include nonaccrual commercial loans and leases, as well as all commercial and consumer TDR loans. Previously, TCF did not include impaired leases within the following tables. For purposes of this disclosure, PCI loans have been excluded. In the following table, the balance of impaired loans and leases represents the amount recorded within loans and leases on the Consolidated Statements of Financial Condition, whereas the unpaid contractual balance represents the balances legally owed by the borrowers.

Information on impaired loans and leases at September 30, 2019 and information on impaired loans at December 31, 2018 was as follows:

	At September 30, 2019						At December 31, 2018
(In thousands)	Unpaid Contractual Balance		Loan and Lease Balance		Related Allowance Recorded		Unpaid Contractual Balance		Loan Balance		Related Allowance Recorded
Impaired loans and leases with an allowance recorded:
Commercial loan and lease portfolio:
Commercial and industrial	$	27,748	$	24,775	$	5,151	$	35,444	$	32,326	$	6,354
Commercial real estate	4,257		3,922		330		4,905		4,474		1,108
Lease financing	11,503		11,503		2,731		—		—		—
Total commercial loan and lease portfolio	43,508		40,200		8,212		40,349		36,800		7,462
Consumer loan portfolio:
Residential mortgage	81,658		78,247		13,630		63,004		60,172		17,216
Consumer installment	—		—		—		919		647		81
Home equity	30,584		29,228		2,916		27,386		25,836		5,288
Total consumer loan portfolio	112,242		107,475		16,546		91,309		86,655		22,585
Total impaired loans and leases with an allowance recorded	155,750		147,675		24,758		131,658		123,455		30,047
Impaired loans and leases without an allowance recorded:
Commercial loan and lease portfolio:
Commercial and industrial	56,284		36,409		—		2,239		2,237		—
Commercial real estate	63,069		34,950		—		4,275		4,208		—
Total commercial loan and lease portfolio	119,353		71,359		—		6,514		6,445		—
Consumer loan portfolio:
Residential mortgage	27,420		19,370		—		11,636		9,494		—
Consumer installment	1,878		635		—		15,400		10,770		—
Home equity	16,771		5,420		—		10,620		1,429		—
Total consumer loan portfolio	46,069		25,425		—		37,656		21,693		—
Total impaired loans and leases without an allowance recorded	165,422		96,784		—		44,170		28,138		—
Total impaired loans and leases	$	321,172	$	244,459	$	24,758	$	175,828	$	151,593	$	30,047

The average balance of impaired loans and leases and interest income recognized on impaired loans and leases and the average loan balance of impaired loans and interest income recognized on impaired loans were as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2018				2019				2018
(In thousands)	Average Loan and Lease Balance		Interest Income Recognized		Average Loan Balance		Interest Income Recognized		Average Loan and Lease Balance		Interest Income Recognized		Average Loan Balance		Interest Income Recognized
Impaired loans and leases with an allowance recorded
Commercial loan and lease portfolio:
Commercial and industrial	$	22,845	$	3	$	22,917	$	49	$	28,551	$	32	$	15,213	$	251
Commercial real estate	4,175		51		5,192		—		4,198		120		5,929		—
Lease financing	12,195		55		—		—		5,751		117		8,552		—
Total commercial loan and lease portfolio	39,215		109		28,109		49		38,500		269		29,694		251
Consumer loan portfolio:
Residential mortgage	77,852		770		60,737		380		69,209		1,864		69,268		1,221
Consumer installment	289		—		454		—		324		—		713		—
Home equity	30,225		94		26,462		301		27,532		681		29,583		1,326
Total consumer loan portfolio	108,366		864		87,653		681		97,065		2,545		99,564		2,547
Total impaired loans and leases with an allowance recorded	$	147,581	$	973	$	115,762	$	730	$	135,565	$	2,814	$	129,258	$	2,798
Impaired loans and leases without an allowance recorded
Commercial loan and lease portfolio:
Commercial and industrial	$	20,448	$	37	$	403	$	31	$	19,323	$	129	$	1,510	$	136
Commercial real estate	39,222		437		4,315		58		19,579		1,087		4,385		174
Lease financing	—		—		—		—		—		—		—		—
Total commercial loan and lease portfolio	59,670		474		4,718		89		38,902		1,216		5,895		310
Consumer loan portfolio:
Residential mortgage	12,609		121		9,982		160		14,431		450		10,013		502
Consumer installment	6,476		83		8,757		77		5,703		256		8,630		211
Home equity	3,551		23		1,683		55		3,425		110		1,648		177
Total consumer loan portfolio	22,636		227		20,422		292		23,559		816		20,291		890
Total impaired loans and leases without an allowance recorded	82,306		701		25,140		381		62,461		2,032		26,186		1,200
Total impaired loans and leases	$	229,887	$	1,674	$	140,902	$	1,111	$	198,026	$	4,846	$	155,444	$	3,998

Other Real Estate Owned and Repossessed and Returned Assets Other real estate owned and repossessed and returned assets were as follows:

(In thousands)	At September 30, 2019		At December 31, 2018
Other real estate owned	$	27,638	$	17,403
Repossessed and returned assets	14,598		14,574
Consumer loans in process of foreclosure	15,509		15,540

On August 1, 2019, TCF acquired $14.6 million of other real estate owned and $0.3 million of repossessed and returned assets in connection with the Merger. Other real estate owned and repossessed and returned assets were written down $2.3 million and $5.5 million during the three and nine months ended September 30, 2019, respectively, and $0.7 million and $2.7 million during the same periods in 2018, included in other assets on the Consolidated Statements of Financial Condition.

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of Debt Securities

The amortized cost and fair value of investment securities were as follows:

	Investment Securities Available-for-sale, At Fair Value
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
At September 30, 2019
Debt securities:
Government and government-sponsored enterprises	$	247,666	$	2	$	521	$	247,147
Obligations of states and political subdivisions	779,263		11,017		609		789,671
Mortgage-backed:
Agency mortgage-backed securities	3,456,110		66,929		4,327		3,518,712
Non-agency mortgage-backed securities	—		—		—		—
Agency collateralized mortgage obligations	565,959		12,484		101		578,342
Non-agency collateralized mortgage obligations	445,174		934		570		445,538
Total mortgage-backed debt securities	4,467,243		80,347		4,998		4,542,592
Corporate debt and trust preferred securities	450		—		25		425
Total debt securities available-for-sale	5,494,622		91,366		6,153		5,579,835
Total investment securities available-for-sale	$	5,494,622	$	91,366	$	6,153	$	5,579,835
At December 31, 2018
Debt securities:
Government and government-sponsored enterprises	$	—	$	—	$	—	$	—
Obligations of states and political subdivisions	566,304		46		9,479		556,871
Mortgage-backed:
Agency mortgage-backed securities	1,845,451		8,026		26,728		1,826,749
Non-agency mortgage-backed securities	—		—		—		—
Agency collateralized mortgage obligations	85,245		1,196		—		86,441
Non-agency collateralized mortgage obligations	4		—		—		4
Total mortgage-backed debt securities	1,930,700		9,222		26,728		1,913,194
Corporate debt and trust preferred securities	—		—		—		—
Total debt securities available-for-sale	2,497,004		9,268		36,207		2,470,065
Total investment securities available-for-sale	$	2,497,004	$	9,268	$	36,207	$	2,470,065

	Investment Securities Held-to-Maturity
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
At September 30, 2019
Agency mortgage-backed securities	$	140,324	$	6,122	$	194	$	146,252
Corporate debt and trust preferred securities	3,676		—		—		3,676
Total investment securities held-to-maturity	$	144,000	$	6,122	$	194	$	149,928
At December 31, 2018
Agency mortgage-backed securities	$	146,052	$	1,460	$	1,045	$	146,467
Corporate debt and trust preferred securities	2,800		—		—		2,800
Total investment securities held-to-maturity	$	148,852	$	1,460	$	1,045	$	149,267

Schedule of Gross Unrealized Losses and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity that are in a Loss Position

Gross unrealized losses and fair value of investment securities aggregated by investment category and the length of time the securities were in a continuous loss position were as follows: 

	At September 30, 2019
	Less than 12 months				12 months or more				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Investment securities available-for-sale
Debt securities:
Government and government sponsored enterprises	$	233,756	$	521	$	—	$	—	$	233,756	$	521
Obligations of states and political subdivisions	273,967		609		—		—		273,967		609
Mortgage-backed:
Agency mortgage-backed securities	241,408		1,479		210,896		2,848		452,304		4,327
Agency collateralized mortgage obligations	37,750		101		—		—		37,750		101
Non-agency collateralized mortgage obligations	152,895		570		—		—		152,895		570
Total mortgage-backed debt securities	432,053		2,150		210,896		2,848		642,949		4,998
Corporate debt and trust preferred securities	425		25		—		—		425		25
Total debt securities available-for-sale	940,201		3,305		210,896		2,848		1,151,097		6,153
Total investment securities available-for-sale	$	940,201	$	3,305	$	210,896	$	2,848	$	1,151,097	$	6,153
Investment securities held-to-maturity
Agency mortgage-backed securities	4,031		52		11,674		142		15,705		194
Total investment securities held-to-maturity	$	4,031	$	52	$	11,674	$	142	$	15,705	$	194

	At December 31, 2018
	Less than 12 months				12 months or more				Total
(In thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Investment securities carried at fair value
Debt securities:
Obligations of states and political subdivisions	$	3,620	$	—	$	526,817	$	9,479	$	530,437	$	9,479
Agency mortgage-backed securities	102,709		184		838,482		26,544		941,191		26,728
Total debt securities available-for-sale	106,329		184		1,365,299		36,023		1,471,628		36,207
Total investment securities available-for-sale	$	106,329	$	184	$	1,365,299	$	36,023	$	1,471,628	$	36,207
Investment securities held-to-maturity
Agency mortgage-backed securities	3,074		14		31,738		1,031		34,812		1,045
Total investment securities held-to-maturity	$	3,074	$	14	$	31,738	$	1,031	$	34,812	$	1,045

Realized Gain (Loss) on Investments

The gross gains and losses on sales of investment securities were as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Gross realized gains	$	7,717	$	—	$	10,872	$	—
Gross realized losses	1,849		—		3,491		—
Recoveries on previously impaired investment securities held-to-maturity	32		94		36		181
Net gains (losses) on investment securities	$	5,900	$	94	$	7,417	$	181

Schedule of Amortized Cost and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity by Contractual Maturity

The amortized cost and fair value of investment securities by final contractual maturity were as follows. Securities with multiple maturity dates are classified in the period of final maturity. The final contractual maturities do not consider possible prepayments and therefore expected maturities may differ because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	At September 30, 2019				At December 31, 2018
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Investment Securities Available-for-Sale
Due in one year or less	$	60,739	$	60,652	$	—	$	—
Due in 1-5 years	199,777		199,399		24,464		24,375
Due in 5-10 years	483,336		492,755		509,832		503,768
Due after 10 years	4,750,770		4,827,029		1,962,708		1,941,922
Total investment securities available-for-sale	$	5,494,622	$	5,579,835	$	2,497,004	$	2,470,065
Investment Securities Held-to-Maturity
Due in 1-5 years	$	3,150	$	3,150	$	2,400	$	2,400
Due in 5-10 years	460		467		430		432
Due after 10 years	140,390		146,311		146,022		146,435
Total investment securities held-to-maturity	$	144,000	$	149,928	$	148,852	$	149,267

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Parent Company Financial Information

9 Months Ended

Sep. 30, 2019

Condensed Financial Information Disclosure [Abstract]

Parent Company Financial Information

Parent Company Financial Information

TCF Financial's condensed statements of financial condition, income and cash flows were as follows:

Condensed Statements of Financial Condition

(In thousands)	September 30, 2019		December 31, 2018
Assets
Cash and cash equivalents	$	165,457	$	91,132
Premises and equipment, net	3,883		78
Deferred tax asset	13,485		2,974
Investment in TCF Bank	5,483,484		2,426,329
Accounts receivable from TCF Bank	19,849		23,780
Other assets	25,823		1,201
Total assets	$	5,711,981	$	2,545,494
Liabilities and Equity
Long term borrowings	$	19,005	$	—
Other liabilities	22,872		7,693
Total liabilities	41,877		7,693
Equity	5,670,104		2,537,801
Total liabilities and equity	$	5,711,981	$	2,545,494

Condensed Statements of Income

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands)	2019			2018		2019			2018
Interest income	$	89		$	48	$	166		160
Interest expense	199			—		199			—
Net interest income	(110		)	48		(33		)	160
Noninterest income
Dividends from TCF Bank	—			32,001		150,001			331,000
Management fees	—			—		—			—
Other	1,979			5,383		8,742			14,352
Total noninterest income	1,979			37,384		158,743			345,352
Noninterest expense
Compensation and employee benefits	4,838			4,739		12,255			15,320
Occupancy and equipment	141			82		296			220
Other	1,675			1,420		3,689			4,186
Total noninterest expense	6,654			6,241		16,240			19,726
Income (loss) before income tax benefit and equity in undistributed earnings (loss) of TCF Bank	(58,744		)	31,191		77,970			325,786
Income tax benefit	11,409			116		14,572			1,633
Income before equity in undistributed earnings (loss) of TCF Bank	(47,335		)	31,307		92,542			327,419
Equity in undistributed earnings (loss) of TCF Bank	69,483			54,892		90,527			(108,713		)
Net income	22,148			86,199		183,069			218,706
Preferred stock dividends	2,494			2,493		7,482			12,574
Impact of preferred stock redemption	—			—		—			—
Net income available to common shareholders	$	19,654		$	83,706	$	175,587		$	206,132

Condensed Statements of Cash Flows

	Nine Months Ended September 30,
(In thousands)	2019			2018
Cash flows from operating activities
Net income	$	183,069		$	218,706
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in undistributed (earnings) loss of TCF Bank	(90,527		)	108,713
Share-based compensation expense	17,762			14,041
Depreciation and amortization	99			26
Provision (benefit) for deferred income taxes	14			—
Net (losses) gains on sales of assets	(8		)	(387		)
Net change in other assets	(887		)	975
Net change in other liabilities	(13,104		)	(374		)
Other, net	(2,756		)	(100		)
Net cash provided by (used in) operating activities	93,662			341,600
Cash flows from investing activities
Purchases of premises and equipment and lease equipment	(51		)	(3		)
Proceeds from sales of premises and equipment	28			17
Net cash acquired in business combination	155,154			—
Other, net	—			665
Net cash provided by (used in) investing activities	155,131			679
Cash flows from financing activities
Redemption of Series B preferred stock	—			(100,000		)
Repurchases of common stock	(58,805		)	(149,912		)
Common shares sold to TCF employee benefit plans	—			715
Dividends paid on preferred stock	(7,482		)	(9,094		)
Dividends paid on common stock	(102,368		)	(74,916		)
Payments related to tax-withholding upon conversion of share-based awards	(5,813		)	(6,563		)
Exercise of stock options	—			(998		)
Net cash provided by (used in) financing activities	(174,468		)	(340,768		)
Net change in cash and cash equivalents	74,325			1,511
Cash and cash equivalents at beginning of period	91,132			80,471
Cash and cash equivalents at end of period	$	165,457		$	81,982

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Earnings Per Common Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Common Share

Earnings Per Common Share

The number of shares issued and outstanding, earnings per share, additional paid-in-capital and all references to share quantities of TCF have been retrospectively adjusted to reflect the equivalent number of shares issued in the Merger. The computations of basic and diluted earnings per common share and the anti-dilutive shares outstanding not included in the computation of diluted earnings per share were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollars in thousands, except per share data)	2019		2018		2019		2018
Basic earnings per common share
Net income attributable to TCF Financial Corporation	$	22,148	$	86,196	$	183,069	$	218,706
Preferred stock dividends	2,494		2,494		7,481		9,094
Impact of preferred stock redemption(1)	—		—		—		3,481
Net income available to common shareholders	19,654		83,702		175,588		206,131
Less: Earnings allocated to participating securities	—		13		19		30
Earnings allocated to common stock	$	19,654	$	83,689	$	175,569	$	206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation	128,575,171		83,762,625		97,876,262		84,522,519
Basic earnings per common share	$	0.15	$	1.00	$	1.79	$	2.44
Diluted earnings per common share
Earnings allocated to common stock	$	19,654	$	83,689	$	175,569	$	206,101
Weighted-average common shares outstanding used in basic earnings per common share calculation	128,575,171		83,762,625		97,876,262		84,522,519
Net dilutive effect of:
Non-participating restricted stock	73,698		—		139,795		—
Stock options	105,719		—		39,222		1,670
Warrants	—		45,438		—		266,935
Weighted-average common shares outstanding used in diluted earnings per common share calculation	128,754,588		83,808,063		98,055,279		84,791,124
Diluted earnings per common share	$	0.15	$	1.00	$	1.79	$	2.43
Anti-dilutive shares outstanding not included in the computation of diluted earnings per common share
Non-participating restricted stock	1,369,025		1,058,202		1,369,025		1,058,202

(1)

Represents the amount of deferred stock issuance costs originally recorded in preferred stock that were reclassified to retained earnings.