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 June 30, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______to ______

Commission File Number 001-38139

Byline Bancorp, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	36-3012593
(State or Other Jurisdiction of Incorporation or Organization)	(IRS Employer Identification Number)

180 North LaSalle Street, Suite 300

Chicago, Illinois 60601

(Address of Principal Executive Offices)

(773) 244-7000

(Registrant’s telephone number, including area code)

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 Securities Exchange Act of 1934.

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 ☒

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock	BY	New York Stock Exchange

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock, $0.01 par value, 38,114,669 shares outstanding as of August 7, 2019

BYLINE BANCORP, INC.

FORM 10-Q

June 30, 2019

INDEX

		Page
PART I.	FINANCIAL INFORMATION	3
Item 1.	Financial Statements. The Unaudited Interim Condensed Consolidated Financial Statements of Byline Bancorp, Inc. filed as part of the report are as follows:	3
	Consolidated Statements of Financial Condition at June 30, 2019 (unaudited) and December 31, 2018	3
	Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2019 and 2018  (unaudited)	4
	Consolidated Statements of Comprehensive Income for the Three and Six Months Ended June 30, 2019 and 2018 (unaudited)	5
	Consolidated Statements of Changes in Stockholders’ Equity for the Three and Six Months Ended June 30, 2019 and 2018 (unaudited)	6
	Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2019 and 2018 (unaudited)	9
	Notes to Unaudited Interim Condensed Consolidated Financial Statements	11
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	56
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	98
Item 4.	Controls and Procedures	101
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	102
Item 1A.	Risk Factors	102
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	102
Item 3.	Defaults Upon Senior Securities	102
Item 4.	Mine Safety Disclosures	102
Item 5.	Other Information	102
Item 6.	Exhibits	104

2

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION

	(Unaudited)
(dollars in thousands, except per share data)	June 30, 2019			December 31, 2018
ASSETS
Cash and due from banks	$	57,513		$	30,190
Interest bearing deposits with other banks		31,802			91,670
Cash and cash equivalents		89,315			121,860
Equity and other securities, at fair value		7,662			—
Securities available-for-sale, at fair value		969,029			817,656
Securities held-to-maturity, at amortized cost (fair value at    June 30, 2019—$4,488, December 31, 2018—$97,739)		4,421			99,266
Restricted stock, at cost		22,937			19,202
Loans held for sale		18,473			19,827
Loans and leases:
Loans and leases		3,863,148			3,501,626
Allowance for loan and lease losses		(31,132	)		(25,201	)
Net loans and leases		3,832,016			3,476,425
Servicing assets, at fair value		19,760			19,693
Accrued interest receivable		12,913			10,863
Premises and equipment, net		96,588			97,680
Assets held for sale		16,329			14,489
Other real estate owned, net		8,070			5,314
Goodwill		145,638			128,177
Other intangible assets, net		35,908			33,419
Bank-owned life insurance		9,634			5,961
Deferred tax assets, net		35,737			35,643
Due from counterparty		34,226			5,338
Other assets		32,580			31,761
Total assets	$	5,391,236		$	4,942,574
LIABILITIES AND STOCKHOLDERS’ EQUITY
LIABILITIES
Non-interest-bearing demand deposits	$	1,240,375		$	1,192,873
Interest-bearing deposits:
NOW, savings accounts, and money market accounts		1,554,791			1,413,158
Time deposits		1,265,077			1,143,885
Total deposits		4,060,243			3,749,916
Accrued interest payable		4,522			3,484
Line of credit		—			—
Federal Home Loan Bank advances		500,000			425,000
Securities sold under agreements to repurchase		32,885			34,166
Junior subordinated debentures issued to capital trusts, net		37,059			36,768
Accrued expenses and other liabilities		38,852			42,568
Total liabilities		4,673,561			4,291,902
STOCKHOLDERS’ EQUITY
Preferred stock		10,438			10,438
Common stock, voting, $0.01 par value at June 30, 2019 and December 31, 2018;    150,000,000 shares authorized at June 30, 2019 and December 31, 2018;    38,115,219 shares issued and outstanding at June 30, 2019 and 36,343,239    issued and outstanding at December 31, 2018		378			361
Additional paid-in capital		578,828			546,849
Retained earnings		129,379			102,522
Accumulated other comprehensive loss, net of tax		(1,348	)		(9,498	)
Total stockholders’ equity		717,675			650,672
Total liabilities and stockholders’ equity	$	5,391,236		$	4,942,574

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

3

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(dollars in thousands, except share and per share data)	2019			2018			2019			2018
INTEREST AND DIVIDEND INCOME
Interest and fees on loans and leases	$	59,524		$	39,627		$	113,907		$	73,281
Interest on taxable securities		6,237			4,572			11,996			8,627
Interest on tax-exempt securities		428			229			771			403
Other interest and dividend income		571			413			1,196			672
Total interest and dividend income		66,760			44,841			127,870			82,983
INTEREST EXPENSE
Deposits		9,306			3,745			17,382			6,243
Federal Home Loan Bank advances		2,174			1,360			4,273			2,718
Subordinated debentures and other borrowings		832			680			1,682			1,271
Total interest expense		12,312			5,785			23,337			10,232
Net interest income		54,448			39,056			104,533			72,751
PROVISION FOR LOAN AND LEASE LOSSES		6,391			3,956			10,390			9,071
Net interest income after provision for loan and lease losses		48,057			35,100			94,143			63,680
NON-INTEREST INCOME
Fees and service charges on deposits		1,441			1,456			3,211			2,768
Loan servicing revenue		2,630			2,533			5,169			4,983
Loan servicing asset revaluation		(1,223	)		(2,074	)		(2,484	)		(3,961	)
ATM and interchange fees		945			850			1,662			1,763
Net gains on sales of securities available-for-sale		973			4			973			4
Change in fair value of equity securities, net		551			—			1,050			—
Net gains on sales of loans		7,472			9,723			13,705			17,199
Wealth management and trust income		626			192			1,221			192
Other non-interest income		768			1,527			1,664			2,386
Total non-interest income		14,183			14,211			26,171			25,334
NON-INTEREST EXPENSE
Salaries and employee benefits		23,652			19,244			46,544			37,522
Occupancy expense, net		4,337			4,499			8,617			8,254
Equipment expense		732			558			1,401			1,161
Loan and lease related expenses		1,841			1,471			3,418			2,871
Legal, audit and other professional fees		2,981			4,418			5,047			6,269
Data processing		3,849			10,371			6,993			12,672
Net loss recognized on other real estate owned and other    related expenses		252			472			448			471
Regulatory assessments		371			366			312			607
Other intangible assets amortization expense		1,959			1,130			3,732			1,897
Advertising and promotions		732			347			1,441			596
Telecommunications		537			466			1,001			884
Other non-interest expense		2,711			2,137			5,679			3,889
Total non-interest expense		43,954			45,479			84,633			77,093
INCOME BEFORE PROVISION FOR INCOME TAXES		18,286			3,832			35,681			11,921
PROVISION FOR INCOME TAXES		5,075			1,064			9,873			2,385
NET INCOME		13,211			2,768			25,808			9,536
Dividends on preferred shares		195			198			391			391
INCOME AVAILABLE TO COMMON STOCKHOLDERS	$	13,016		$	2,570		$	25,417		$	9,145
EARNINGS PER COMMON SHARE
Basic	$	0.35		$	0.08		$	0.69		$	0.30
Diluted	$	0.34		$	0.08		$	0.68		$	0.29

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

4

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(UNAUDITED)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(dollars in thousands)	2019			2018			2019			2018
Net income	$	13,211		$	2,768		$	25,808		$	9,536
Securities available-for-sale
Unrealized holding gains (losses) arising during the period		12,328			(2,556	)		20,962			(11,408	)
Reclassification adjustments for net gains included in net income		(973	)		(4	)		(973	)		(4	)
Tax effect		(3,405	)		782			(5,700	)		3,177
Net of tax		7,950			(1,778	)		14,289			(8,235	)
Cash flow hedges
Unrealized holding gains (losses) arising during the period		(3,417	)		1,562			(5,234	)		5,632
Reclassification adjustments for net gains included in net    income		(575	)		(374	)		(1,280	)		(435	)
Tax effect		1,113			(331	)		1,815			(1,447	)
Net of tax		(2,879	)		857			(4,699	)		3,750
Total other comprehensive income (loss)		5,071			(921	)		9,590			(4,485	)
Comprehensive income	$	18,282		$	1,847		$	35,398		$	5,051

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

5

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(UNAUDITED)

										Additional					Accumulated Other			Total
	Preferred Stock				Common Stock					Paid-In					Comprehensive			Stockholders’
(dollarsin thousands, except share data)	Shares		Amount		Shares			Amount		Capital		Retained Earnings			Income (Loss)			Equity
Balance, December 31, 2017		10,438	$	10,438		29,317,298		$	292	$	391,586	$	61,349		$	(5,087	)	$	458,578
Net income		—		—		—			—		—		6,768			—			6,768
Other comprehensive loss,    net of tax		—		—		—			—		—		—			(3,564	)		(3,564	)
Issuance of common stock upon    exercise of stock options		—		—		86,750			1		1,004		—			—			1,005
Reclassification of certain income    tax effects from accumulated    other comprehensive income    (loss)		—		—		—			—		—		763			(763	)		—
Cash dividends declared on    preferred stock		—		—		—			—		—		(193	)		—			(193	)
Share-based compensation    expense		—		—		—			—		342		—			—			342
Balance, March 31, 2018		10,438	$	10,438		29,404,048		$	293	$	392,932	$	68,687		$	(9,414	)	$	462,936
Net income		—		—		—			—		—		2,768			—			2,768
Other comprehensive loss,    net of tax		—		—		—			—		—		—			(921	)		(921	)
Issuance of common stock upon    exercise of stock options		—		—		8,000			—		130		—			—			130
Issuance of common stock and    stock options due to business    combination, net of issuance    costs		—		—		6,682,850			67		151,208		—			—			151,275
Issuance of common stock in    connection with restricted stock    awards		—		—		126,157			—		—		—			—			—
Forfeiture of restricted stock    awards		—		—		(2,100	)		—		—		—			—			—
Cash dividends declared on    preferred stock		—		—		—			—		—		(198	)		—			(198	)
Share-based compensation    expense		—		—		—			—		416		—			—			416
Balance, June 30, 2018		10,438	$	10,438		36,218,955		$	360	$	544,686	$	71,257		$	(10,335	)	$	616,406

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

6

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(UNAUDITED)

									Additional					Accumulated Other			Total
	Preferred Stock				Common Stock				Paid-In					Comprehensive			Stockholders’
(dollarsin thousands, except share data)	Shares		Amount		Shares		Amount		Capital		Retained Earnings			Income (Loss)			Equity
Balance, June 30, 2018		10,438	$	10,438		36,218,955	$	360	$	544,686	$	71,257		$	(10,335	)	$	616,406
Net income		—		—		—		—		—		14,536			—			14,536
Other comprehensive loss,    net of tax		—		—		—		—		—		—			(2,027	)		(2,027	)
Issuance of common stock upon    exercise of stock options		—		—		51,763		1		566		—			—			567
Issuance of common stock in    connection with employee    stock purchase plan		—		—		8,882		—		172		—			—			172
Cash dividends declared on    preferred stock		—		—		—		—		—		(196	)		—			(196	)
Share-based compensation    expense		—		—		—		—		403		—			—			403
Balance, September 30, 2018		10,438	$	10,438		36,279,600	$	361	$	545,827	$	85,597		$	(12,362	)	$	629,861
Net income		—		—		—		—		—		17,121			—			17,121
Other comprehensive loss,    net of tax		—		—		—		—		—		—			2,864			2,864
Issuance of common stock upon    exercise of stock options		—		—		58,639		—		638		—			—			638
Issuance of common stock in    connection with restricted stock    awards		—		—		5,000		—		—		—			—			—
Issuance of common stock in    connection with employee    stock purchase plan		—		—		—		—		31		—			—			31
Cash dividends declared on    preferred stock		—		—		—		—		—		(196	)		—			(196	)
Share-based compensation    expense		—		—		—		—		353		—			—			353
Balance, December 31, 2018		10,438	$	10,438		36,343,239	$	361	$	546,849	$	102,522		$	(9,498	)	$	650,672

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

7

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

Six Months Ended June 30, 2019

(UNAUDITED)

										Additional					Accumulated Other			Total
	Preferred Stock				Common Stock					Paid-In					Comprehensive			Stockholders’
(dollarsin thousands, except share data)	Shares		Amount		Shares			Amount		Capital		Retained Earnings			Income (Loss)			Equity
Balance, January 1, 2019		10,438	$	10,438		36,343,239		$	361	$	546,849	$	102,522		$	(9,498	)	$	650,672
Net income		—		—		—			—		—		12,597			—			12,597
Other comprehensive loss,    net of tax		—		—		—			—		—		—			4,519			4,519
Issuance of common stock upon    exercise of stock options		—		—		50,662			1		635		—			—			636
Forfeiture of restricted stock    awards		—		—		(8,500	)		—		—		—			—			—
Issuance of common stock in    connection with employee    stock purchase plan		—		—		12,743			—		291		—			—			291
Cumulative-effect adjustment    (ASU 2016-01)		—		—		—			—		—		1,440			(1,440	)
Cash dividends declared on    preferred stock		—		—		—			—		—		(196	)		—			(196	)
Share-based compensation    expense		—		—		—			—		230		—			—			230
Balance, March 31, 2019		10,438	$	10,438		36,398,144		$	362	$	548,005	$	116,363		$	(6,419	)	$	668,749
Net income		—		—		—			—		—		13,211			—			13,211
Other comprehensive income,    net of tax		—		—		—			—		—		—			5,071			5,071
Issuance of common stock due to    exercise of stock options		—		—		116,048			1		1,668		—			—			1,669
Issuance of common stock due to    business combination, net of    issuance costs		—		—		1,464,558			15		28,877		—			—			28,892
Issuance of common stock in    connection with restricted stock    awards		—		—		141,207			—		—		—			—			—
Forfeiture of restricted stock    awards		—		—		(4,738	)		—		—		—			—			—
Cash dividends declared on    preferred stock		—		—		—			—		—		(195	)		—			(195	)
Share-based compensation    expense		—		—		—			—		278		—			—			278
Balance, June 30, 2019		10,438	$	10,438		38,115,219		$	378	$	578,828	$	129,379		$	(1,348	)	$	717,675

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

8

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

	Six Months Ended
	June 30,
(dollars in thousands)	2019			2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	25,808		$	9,536
Adjustments to reconcile net income to net cash from operating activities:
Provision for loan and lease losses		10,390			9,071
Impairment loss on assets held for sale		392			117
Depreciation and amortization of premises and equipment		3,260			2,608
Change in fair value of equity securities, net		(1,050	)		—
Net amortization of securities		1,192			1,876
Net gains on sales of securities available-for-sale		(973	)		(4	)
Losses on disposal of premises and equipment		—			98
Net gains on sales of assets held for sale		(13	)		(260	)
Net gains on sales of loans		(13,705	)		(17,199	)
Originations of U.S. government guaranteed loans		(140,780	)		(175,120	)
Proceeds from U.S. government guaranteed loans sold		133,061			204,807
Accretion of premiums and discounts on acquired loans, net		(10,069	)		(5,941	)
Net change in servicing assets		(67	)		(187	)
Net valuation adjustments on other real estate owned		163			213
Net losses on sales of other real estate owned		27			109
Amortization of intangible assets		3,732			1,897
Amortization of time deposit premium		(111	)		(84	)
Amortization of Federal Home Loan Bank advances premium		—			(19	)
Accretion of junior subordinated debentures discount		291			308
Share-based compensation expense		508			758
Deferred tax provision, net of valuation		906			2,225
Increase in cash surrender value of bank owned life insurance		(188	)		(168	)
Changes in assets and liabilities:
Accrued interest receivable		(3,036	)		(77	)
Other assets		(10,445	)		(3,803	)
Accrued interest payable		957			686
Accrued expenses and other liabilities		(9,731	)		22,530
Net cash (used in) provided by operating activities		(9,481	)		53,977
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of securities available-for-sale		(149,176	)		(96,086	)
Proceeds from maturities and calls of securities available-for-sale		33,671			6,630
Proceeds from paydowns of securities available-for-sale		42,176			29,462
Proceeds from sales of securities available-for-sale		59,594			544
Proceeds from paydowns of securities held-to-maturity		—			9,601
Purchases of Federal Home Loan Bank stock		(19,935	)		(13,998	)
Federal Home Loan Bank stock repurchases		16,614			12,724
Net change in loans and leases		(95,799	)		(166,130	)
Purchases of premises and equipment		(1,413	)		(537	)
Proceeds from sales of assets held for sale		514			1,041
Proceeds from sales of other real estate owned		1,148			4,678
Net cash received in acquisition of business		4,306			20,374
Net cash used in investing activities		(108,300	)		(191,697	)

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

9

BYLINE BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

(UNAUDITED)

	Six Months Ended
	June 30,
(dollars in thousands)	2019			2018
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	$	20,267		$	179,364
Proceeds from Federal Home Loan Bank advances		3,503,500			2,941,900
Repayments of Federal Home Loan Bank advances		(3,433,800	)		(2,883,387	)
Proceeds from line of credit		5,680			—
Repayments of line of credit		(11,335	)		—
Net decrease in securities sold under agreements to repurchase		(1,281	)		(6,534	)
Dividends paid on preferred stock		(391	)		(391	)
Proceeds from issuance of common stock upon exercise of stock options		2,305			1,135
Proceeds from issuance of common stock		291			—
Net cash provided by financing activities		85,236			232,087
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS		(32,545	)		94,367
CASH AND CASH EQUIVALENTS, beginning of period		121,860			58,349
CASH AND CASH EQUIVALENTS, end of period	$	89,315		$	152,716
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	$	22,200		$	9,081
Cash payments (refunds) during the period for taxes	$	9,507		$	2,752
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND    FINANCING ACTIVITIES:
Change in fair value of available-for-sale securities, net of tax	$	14,289		$	(8,235	)
Change in fair value of cash flow hedges, net of tax	$	(4,699	)	$	3,750
Delayed payments of mortgage-backed securities	$	841		$	621
Transfer of securities from held-to-maturity to available-for-sale	$	94,837		$	—
Reclassification of equity and other securities	$	6,609		$	—
Transfers of loans to other real estate owned	$	2,076		$	1,220
Internally financed sale of other real estate owned	$	183		$	444
Transfers of land and premises to assets held for sale	$	2,733		$	2,531
Transfers of premises and equipment to other assets	$	—		$	2
Transfer of other assets to assets held for sale	$	—		$	16
Due from counterparties	$	34,226		$	25,569
Due to broker	$	—		$	10,029
Total assets acquired from acquisition	$	341,375		$	1,142,766
Total liabilities assumed from acquisition	$	305,892		$	1,036,609
Common stock and stock options issued due to acquisition of business	$	29,320		$	152,127

See accompanying Notes to Unaudited Interim Condensed Consolidated Financial Statements.

10

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 1—Basis of Presentation

These unaudited interim condensed consolidated financial statements include the accounts of BylineBancorp, Inc., a Delaware corporation(the“Company,” “Byline,”“we,” “us,”“our”),a bank holding companywhose principalactivityistheownershipand managementof its Illinois state chartered subsidiarybank, BylineBank (the “Bank”), based in Chicago, Illinois.

These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). In preparing these financial statements, the Company has evaluated events and transactions subsequent to June 30, 2019 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information in footnote disclosures normally included in financial statements prepared in accordance with GAAP has been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Consolidated Financial Statements for the years ended December 31, 2018, 2017, and 2016.

In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s management has evaluated subsequent events for potential recognition or disclosure through the date of the issuance of these consolidated financial statements.

The Company has one reportable segment. The Company’s chief operating decision maker evaluates the operations of the Company using consolidated information for purposes of allocating resources and assessing performance. Therefore, segments disclosures are not required.

No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements.

Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity.

Note 2—Accounting Pronouncements Recently Adopted or Issued

The following reflect recent accounting pronouncements that have been adopted or are pending adoption by the Company. As the Company qualifies as an emerging growth company and has elected the extended transition period for complying with new or revised accounting pronouncements, it is not subject to new or revised accounting standards applicable to public companies during the extended transition period. The accounting pronouncements pending adoption below reflect effective dates for the Company as an emerging growth company with the extended transition period.

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BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Adopted Accounting Pronouncements

Revenue from Contracts with Customers In May 2014, FASB issued Accounting Standards Update (“ASU”) No. 2014-09, deferred by ASU No. 2015-14 and clarifying standards, Revenue from Contracts with Customers, which creates Topics 606 and 610 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In April 2016, FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing. The amendments in this ASU clarify the following two aspects of Topic 606: (1) identifying performance obligations and (2) licensing implementation guidance, while retaining the related principles for those areas. In May 2016, FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, amending ASC Topic 606, Revenue from Contracts with Customers. The amendments in this ASU affect only several narrow aspects of Topic 606. In November 2017, FASB issued ASU No. 2017-14, amending ASC Topic 606, Revenue from Contracts with Customers. The ASU amends the codification to incorporate additional previously issued guidance from the SEC. The SEC issued SAB 116 to bring existing SEC staff guidance into conformity with the FASB’s adoption of and amendments to ASC Topic 606.

In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The new authoritative guidance was initially effective for reporting periods after January 1, 2017 but was deferred to January 1, 2018. Given our emerging growth status, the Company adopted this new guidance on January 1, 2019 using the full retrospective method, meaning the standard is applied to all periods presented in the financial statements with the cumulative effect of initially applying the standard recognized at the beginning of the earliest period presented.

The majority of the Company’s revenue streams, including interest and dividend income, servicing fees, and gains on sales of loans and investments, are outside the scope of Topic 606. Revenue streams reported as fees and service charges on deposits, ATM and interchange fees, and wealth management and trust income are within the scope of Topic 606. The Company applied the requirements of Topic 606 to the revenue streams that are within its scope. The adoption of Topic 606 did not result in any changes in the either timing or amount of recognized; there was no cumulative effect adjustment to opening retained earnings as no material changes were identified in the timing of revenue recognition. However, the presentation of certain costs associated with our ATM and debit card income were offset against ATM and interchange income. This change in presentation resulted in $381,000 and $727,000 of expenses for the three and six months ended June 30, 2019, respectively, being netted against ATM and interchange fees and reported in non-interest income instead of as other non-interest expense in non-interest expense. In addition, to conform to the current period presentation, $291,000 and $596,000 of related expenses for the three and six months ended June 30, 2018, respectively, were reclassified from other non-interest expense in non-interest expense to being netted against ATM and interchange fees in non-interest income. The Company elected to apply the practical expedient and therefore does not disclose information about remaining performance obligations that have an original expected term of one year or less and allows the Company to expense costs related to obtaining a contract as incurred when the amortization period would have been one year or less.

The Company adopted ASU 2014-09 using the full retrospective approach. The following table presents the impact of adopting the new revenue standard on our Consolidated Statements of Operations for the periods presented (in thousands):

	For the Three Months Ended							For the Three Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	945	$	1,326	$	(381	)	$	850	$	1,141	$	(291	)
Non-interest expense:
Other non-interest expense	$	2,711	$	3,092	$	(381	)	$	2,137	$	2,428	$	(291	)

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BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

	For the Six Months Ended							For the Six Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	1,662	$	2,389	$	(727	)	$	1,763	$	2,359	$	(596	)
Non-interest expense:
Other non-interest expense	$	5,679	$	6,406	$	(727	)	$	3,889	$	4,485	$	(596	)

Fees and service charges on deposits:  

Fees and service charges on deposits include transaction and non-transaction based deposit fees. Transaction based fees on deposit accounts are charged to deposit customers for specific services provided to the customer. These fees include such items as wire fees, official check fees, and overdraft fees. These are contracts specific to each individual transaction and do not extend beyond the individual transaction. The performance obligation is completed and the fees are recognized at the time the specific transactional service is provided to the customer. Non-transactional deposit fees are typically monthly account maintenance fees charged on deposit accounts. These are day-to-day contracts that can be cancelled by either party without notice. The performance obligation is satisfied and the fees are recognized on a monthly basis after the service period is completed.

ATM and interchange fees:  

ATM fees represent fees earned when a foreign debit or ATM card is used in a Byline Bank ATM. These fees are assessed and paid at the time of each transaction as the performance obligation is satisfied, which is at the point in time that the transaction is performed and approved. Interchange fees represent fees earned when a debit card issued by the Bank is used to purchase goods or services at a merchant. The merchant's bank pays the Bank a default interchange rate set by MasterCard on a transaction by transaction basis. Interchange fees are assessed as the performance obligation is satisfied, which is at the point in time the card transaction is authorized. The performance obligation is satisfied and the fees are earned when the cost of the transaction is charged to the Bank cardholders’ card. Direct expenses associated with ATM and debit cards are recorded as a net reduction against the ATM and interchange income.

Wealth management and trust income

Wealth management and trust income represents fees earned by the Bank for discretionary investment management, trust administration, fiduciary and/or custody services rendered. Fees vary and are based on a contract with the customer. Fee income is determined as a percentage of assets under management and is recognized over the period the underlying account is serviced. Although some trust appointments can last for generations, most contracts are generally cancellable at any time, with the customer subject to a pro-rated fee in the month of termination.

Recognition and Measurement of Financial Assets and Financial Liabilities In January 2016, FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this ASU require equity securities to be measured at fair value with changes in the fair value recognized through net income. The amendments allow equity investments that do not have readily determinable fair values to be remeasured at fair value under certain circumstances and require enhanced disclosures about those investments. The amendments simplify the impairment assessment of equity investments without readily determinable fair values. The amendments also eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The amendments require entities to adjust fair value disclosures for financial instruments to be reflected at an exit price. The amendments in this ASU require separate presentation in other comprehensive income of the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This amendment excludes from net income gains or losses that the entity may not realize because those financial liabilities are not usually transferred or settled at their fair values before maturity. The amendments in this ASU require separate presentation of financial assets and financial liabilities by measurement category

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BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements. The Company adopted the provisions of ASU No. 2016-01 as of January 1, 2019. The adoption of this ASU resulted in the Company reclassifying$1.4 million from other comprehensive income to retained earnings, representing the unrealized gain, net of tax, on available-for-sale for sale equity securities at the date of adoption. The provisions of ASU No. 2016-01 require any future changes in fair value of equity securities to be recorded in the Consolidated Statements of Operations which could result in additional volatility in non-interest income.At December 31, 2018, the Company held $6.6 million of available-for-sale equity investment securities, which were previously reported as available-for-sale securities, at fair value, and are now reported as equity and other securities, at fair value.

In addition, the adoption of this ASU resulted in changing how the Company estimates the fair value of portfolio loans and leases for disclosure purposes. Fair values are estimated first by stratifying the portfolios of loans and leases with similar financial characteristics. Loans and leases are segregated by type such as commercial real estate, residential mortgage, construction, land, and development, commercial and industrial, consumer and other. Each loan and lease category is further segmented into fixed- and adjustable-rate interest terms. An estimate of fair value is then calculated based on discounted cash flows using as a discount rate based on the current rate offered on similar products, plus an adjustment for liquidity to reflect the non-homogeneous nature of the loans and leases, as well as a quarterly loss rate based on historical losses to arrive at an estimated exit price fair value. Fair value for impaired loans and leases is also based on recent appraisals or estimated cash flows discounted using rates commensurate with risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are judgmentally determined using available market information and specific borrower information.

Derivatives and Hedging (Topic 815) In August 2017, FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities. The amendments in this ASU better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The Company adopted the provisions of ASU No. 2017-12 on January 1, 2019. Upon adoption, the Company elected to reclassify $94.8 million of securities held-to-maturity to securities available-for-sale, which did not impact on the Consolidated Statements of Operations.

Compensation—Stock Compensation (Topic 718) In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting. The amendments in the ASU provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all of the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified.  If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification. (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified. (3) the classification of the modified award is an equity instrument or liability instrument is the same as the classification of the original award immediately before the original award is modified.  The amendments are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period, for reporting periods for which financial statements have not yet been issued. The amendments should be applied prospectively to an award modified on or after the adoption date. Given our emerging growth status, the Company adopted the provisions of ASU No. 2017-09 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

Statement of Cash Flows (Topic 230) In August 2016, FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments. There is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230 and other Topics. This ASU addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. Those eight issues are (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions, and (8) separately identifiable cash flows and application of the predominance principle. Current GAAP either is unclear or does not include specific guidance on these

14

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

eight cash flow classification issues. These amendments provide guidance for each of the eight issues, thereby reducing current and potential future diversity in practice. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. Given the Company’s emerging growth company status, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company adopted the provisions of ASU No. 2016-15 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash. The ASU will require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this update apply to all entities that have restricted cash or restricted cash equivalents and are required to present a statement of cash flows under Topic 230. The amendment is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years. Given our emerging growth status, the Company adopted these amendments on January 1, 2019 in conjunction with ASU No. 2016-15, which did not have a material impact on the Company’s Consolidated Financial Statements.

Business Combinations (Topic 805) In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business. The guidance clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. This guidance is effective for annual and interim periods beginning after December 15, 2017. Given our emerging growth status, the Company adopted the provisions of ASU No. 2017-01 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

Fair Value Measurement (Topic 820) In August 2018, FASB issued ASU No. 2018-13, Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU modify the disclosure requirements on fair value measurements in Topic 820. The amendments remove the disclosure requirements for the amount and reasons for transfers between Level 1 and Level 2 securities of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurement. The amendments modify the disclosure requirements as follows:for investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly; andclarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The amendments add the following disclosure requirements: the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period; andthe range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Early adoption is permitted. The Company early adopted these amendments in 2018, which did not have a material impact on the Company’s Consolidated Financial Statements.

Issued Accounting Pronouncements Pending Adoption

Leases (Topic 842) In February 2016, FASB issued ASU No. 2016-02, Leases. The amendments in this ASU require lessees to recognize the following for all leases (with the exception of short-term) at the commencement date; a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The amendments in this ASU leave lessor accounting largely unchanged, although certain targeted improvements were made to align lessor accounting with the lessee accounting model. This ASU simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not

15

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

apply a full retrospective transition approach. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company expects an increase in assets and liabilities as a result of recognizing additional right-to-use assets and liabilities under lease contracts in which the Company is lessee. While the Company has not quantified the impact of this ASU on its leasing portfolio, it does not expect a change in its accounting for the initial direct costs of leases.

Financial Instruments—Credit Losses (Topic 326) In June 2016, FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments. Current GAAP requires an “incurred loss” methodology for recognizing credit losses that delays recognition until it is probable a loss has been incurred. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this ASU replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this ASU require a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit loss, which will be more decision useful to users of the financial statements. The amendments in this ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2021. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. While the Company has not quantified the impact of this ASU, it does expect changing from the current incurred loss model to an expected loss model will result in an earlier recognition of losses.

Nonrefundable Fees and Other Costs (Subtopic 310-20) In March 2017, FASB issued ASU No. 2017-08, Receivables—Nonrefundable Fees and Other Costs. The amendments in the ASU shorten the amortization period for certain callable debt securities held at a premium at the earliest call date. Under current GAAP, the Company amortizes the premium as an adjustment of yield over the contractual life of the instrument. As a result, upon exercise of a call on a callable debt security held at a premium, the unamortized premium is charged to earnings. The ASU shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. However, the amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company is required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017-08 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements.

Note 3—Acquisitions

On April 30, 2019, the Company acquired all of the outstanding common stock of Oak Park River Forest Bankshares, Inc. (“Oak Park River Forest”) and its subsidiary pursuant to an Agreement and Plan of Merger, dated as of October 17, 2018 (the “OPRF Merger Agreement”). Oak Park River Forest operated one wholly owned subsidiary, Community Bank of Oak Park River Forest. Oak Park River Forest was merged with and into Byline. As a result of the merger, Oak Park River Forest’s subsidiary bank, Community Bank of Oak Park River Forest, was merged with and into Byline Bank, with Byline Bank as the surviving bank.

16

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

At the effective time of the merger (the “OPRF Effective Time”), each share of Oak Park River Forest’s common stock was converted into the right to receive: (1) 7.9321 shares of Byline’s common stock, and (2) an amount in cash equal to $6.2 million divided by the number of outstanding shares of Oak Park River Forest common stock as of the closing date, with cash paid in lieu of any fractional shares. The per share cash consideration was based on the total $6.2 million divided by the outstanding shares of Oak Park River Forest common stock, or $33.375 per outstanding share. Based on the closing price of the Company’s common stock of $20.02, as reported by the New York Stock Exchange, and 1,464,558 shares of common stock issued with respect to the outstanding shares of Oak Park River Forest common stock, the stock consideration was valued at $29.3 million.  Options to acquire 35,870 shares of Oak Park River Forest common stock that were outstanding at the OPRF Effective Time were cancelled, at the option holders election, in exchange for a cash payment in accordance with the OPRF Merger agreement of $4.2 million, to be paid after the closing date. The value of the total merger consideration at closing was $35.5 million before issuance costs of $429,000.

The transaction resulted in goodwill of $17.5 million, which is nondeductible for tax purposes, as this acquisition was a nontaxable transaction. Goodwill represents the premium paid over the fair value of the net tangible and intangible assets acquired and reflects related synergies expected from the combined operations. The Company incurred Oak Park River Forest merger-related expenses, including acquisition advisory expenses, of $2.4 million for the three months ended June 30, 2019 and $2.5 million for the six months ended June 30, 2019. Core system conversion expenses were $703,000 related to the Oak Park River Forest acquisition for the three and six months ended June 30, 2019. These expenses are reflected in non-interest expense on the Consolidated Statements of Operations.

The acquisition of Oak Park River Forest was accounted for using the acquisition method of accounting in accordance with ASC Topic 805. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. Fair values are preliminary and subject to refinement for up to one year after the closing date of the acquisition as additional information regarding the closing date fair values become available.

On May 31, 2018, the Company acquired all common stock of First Evanston Bancorp, Inc. (“First Evanston”) and its subsidiaries pursuant to an Agreement and Plan of Merger, dated as of November 27, 2017 (the “Merger Agreement”). First Evanston operated two wholly owned subsidiaries, First Bank & Trust and First Evanston Bancorp Trust I. First Evanston was merged with and into Byline. As a result of the merger, First Evanston’s subsidiary bank, First Bank & Trust, was merged with and into Byline Bank, with Byline Bank as the surviving bank. 

At the effective time of the merger (the “Effective Time”), each share of First Evanston’s common stock was converted into the right to receive: (1) 3.994 shares of Byline’s common stock, and (2) an amount in cash equal to $27.0 million divided by the number of outstanding shares of First Evanston common stock as of the closing date, with cash paid in lieu of any fractional shares. The per share cash consideration was based on the total $27.0 million divided by the outstanding shares of First Evanston common stock, or $16.136 per outstanding share. Based on the closing price of the Company’s common stock of $21.62, as reported by the New York Stock Exchange, and 6,682,850 shares of common stock issued with respect to the outstanding shares of First Evanston common stock, the stock consideration was valued at $144.5 million. Options to acquire 144,090 shares of First Evanston common stock that were outstanding at the Effective Time were converted into options to acquire 680,787 shares of Byline common stock, resulting in a consideration value of $7.6 million. The value of the total merger consideration at closing was $179.1 million before issuance costs of $852,000.

The transaction resulted in goodwill of $73.6 million, which is nondeductible for tax purposes, as this acquisition was a nontaxable transaction. The Company incurred First Evanston merger-related expenses, including acquisition advisory expenses,of $1.5 million for the three months ended June 30, 2018. There were no merger-related expenses incurred for the three months ended June 30, 2019. Merger-related expenses were $1.6 million for the six months ended June 30, 2018. There were no merger-related expenses incurred for the six months ended June 30, 2019. Core system conversion expenses were $394,000 related to the First Evanston acquisition for the three months ended June 30, 2019. There were $9.0 million of core system conversion expenses incurred during the three months ended June 30, 2018. Core system conversion expenses were $1.9 million and $9.0 million for the six months ended June 30, 2019 and 2018, respectively. These expenses are reflected in non-interest expense on the Consolidated Statements of Operations.

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BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The acquisition of First Evanston was accounted for using the acquisition method of accounting in accordance with ASC Topic 805. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair value adjustments associated with this transaction were finalized during the fourth quarter of 2018.

The following table presents a summary of the fair values of assets acquired and liabilities assumed as of the acquisition dates:

	Preliminary Estimates April 30, 2019 Oak Park River Forest		May 31, 2018 First Evanston
Assets
Cash and cash equivalents	$	10,469	$	47,378
Securities available-for-sale		30,343		128,063
Restricted stock		414		1,360
Loans		261,151		916,011
Premises and equipment		3,488		15,890
Other real estate owned		2,201		—
Other intangible assets		6,220		22,276
Bank-owned life insurance		3,485		—
Deferred tax assets, net		4,887		2,302
Other assets		1,256		8,845
Total assets acquired		323,914		1,142,125
Liabilities
Deposits		290,171		1,022,268
Line of credit		5,655		—
Federal Home Loan Bank advances		5,300		—
Junior subordinated debentures		—		8,497
Accrued expenses and other liabilities		4,766		5,844
Total liabilities assumed		305,892		1,036,609
Net assets acquired	$	18,022	$	105,516
Consideration paid
Common stock (2019 - 1,464,558 shares issued at $20.02 per    share, 2018 - 6,682,850 shares issued at $21.62 per share)		29,320		144,483
Outstanding stock options converted to Byline stock    options		—		7,644
Cash paid		6,163		27,004
Total consideration paid		35,483		179,131
Goodwill	$	17,461	$	73,615

18

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The following table presents the acquired non-impaired loans as of the acquisition dates:

	April 30, 2019 Oak Park River Forest		May 31, 2018 First Evanston
Fair value	$	212,587	$	890,986
Gross contractual amounts receivable		275,553		1,057,374
Estimate of contractual cash flows not expected to be    collected(1)		23,932		36,544
Estimate of contractual cash flows expected to be collected		251,621		1,020,830

(1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

The discount on the acquired non-impaired loans is being accreted into income over the life of the loans on an effective yield basis.  

The following table provides the unaudited pro forma information for the results of operations for the three and six months ended June 30, 2019 and 2018, as if the acquisitions had occurred on January 1, 2018. The pro forma results combine the historical results of First Evanston and Oak Park River Forest into the Company’s Consolidated Statements of Operations, including the impact of certain acquisition accounting adjustments, which includes loan discount accretion, intangible assets amortization, deposit premium accretion, and borrowing, net of discount amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2018. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, provision for credit losses, expense efficiencies or asset dispositions. The acquisition-related expenses that have been recognized are included in net income in the following table for the three and six months ended June 30, 2019 and 2018.

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Total revenues (net interest income and non-interest    income)	$	69,874	$	68,041	$	136,770	$	131,636
Net income	$	14,909	$	14,280	$	29,460	$	26,372
Earnings per share—basic	$	0.39	$	0.38	$	0.77	$	0.69
Earnings per share—diluted	$	0.38	$	0.37	$	0.76	$	0.68

The operating results of the Company include the operating results produced by the acquired assets and assumed liabilities of First Evanston for the period beginning June 1, 2018 through June 30, 2019, and Oak Park River Forest for the period beginning May 1, 2019 through June 30, 2019. Revenues and earnings of the acquired companies since the acquisition date have not been disclosed as it is not practicable as First Evanston and Oak Park River Forest were both merged into the Company and separate financial information is not readily available.

19

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 4—Securities

The followingtablessummarizetheamortizedcostand fairvaluesof securitiesavailable-for-sale, securitiesheld-to-maturity and equity and other securitiesas of the dates shown and thecorrespondingamountsof grossunrealized gainsand losses:

June 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	45,348	$	482	$	—		$	45,830
U.S. Government agencies		176,425		1,434		(153	)		177,706
Obligations of states, municipalities, and political    subdivisions		88,240		1,695		(17	)		89,918
Residential mortgage-backed securities
Agency		354,480		1,820		(3,889	)		352,411
Non-agency		94,471		418		(399	)		94,490
Commercial mortgage-backed securities
Agency		123,639		765		(1,010	)		123,394
Non-agency		31,302		83		(16	)		31,369
Corporate securities		38,717		290		(108	)		38,899
Other securities		15,012		—		—			15,012
Total	$	967,634	$	6,987	$	(5,592	)	$	969,029

June 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	4,421	$	67	$	—	$	4,488
Total	$	4,421	$	67	$	—	$	4,488

December 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	52,775	$	81	$	(189	)	$	52,667
U.S. Government agencies		187,427		367		(1,296	)		186,498
Obligations of states, municipalities, and political    subdivisions		60,686		133		(586	)		60,233
Residential mortgage-backed securities
Agency		284,038		101		(11,176	)		272,963
Non-agency		84,998		199		(1,576	)		83,621
Commercial mortgage-backed securities
Agency		93,543		55		(3,164	)		90,434
Non-agency		31,458		—		(1,000	)		30,458
Corporate securities		34,716		67		(610	)		34,173
Other securities		4,613		2,127		(131	)		6,609
Total	$	834,254	$	3,130	$	(19,728	)	$	817,656

20

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

December 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	23,835	$	40	$	(210	)	$	23,665
Residential mortgage-backed securities
Agency		40,082		93		(531	)		39,644
Non-agency		35,349		—		(919	)		34,430
Total	$	99,266	$	133	$	(1,660	)	$	97,739

The Company did not classify securities as trading during the three or six months ended June 30, 2019 or during 2018.

The Company adopted the provisions of ASU No. 2016-01 as of January 1, 2019. The adoption of this ASU resulted in the reclassification of available-for-sale equity securities, at fair value to a separate line item on the Company’s Consolidated Statements of Financial Condition, and the reclassification of $1.4 million from other comprehensive income to retained earnings, representing the net unrealized gain, net of tax, on available-for-sale for sale equity securities at the date of adoption. At December 31, 2018, the Company held $6.6 million of available-for-sale equity investment securities which were reported as available-for-sale securities, at fair value, and are now reported as equity and other securities, at fair value. Additionally, the Company adopted the provisions of ASU No. 2017-12 on January 1, 2019, and elected to reclassify $94.8 million of securities held-to-maturity to securities available-for-sale, which did not impact on the Consolidated Statements of Operations.

21

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2019 and December 31, 2018, are summarized as follows:

			Less than 12 Months					12 Months or Longer					Total
June 30, 2019	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		—	$	—	$	—		$	—	$	—		$	—	$	—
U.S. Government agencies		7		367		(1	)		41,223		(152	)		41,590		(153	)
Obligations of states, municipalities and    political subdivisions		7		—		—			4,792		(17	)		4,792		(17	)
Residential mortgage-backed securities
Agency		45		—		—			244,457		(3,889	)		244,457		(3,889	)
Non-agency		10		—		—			59,976		(399	)		59,976		(399	)
Commercial mortgage-backed securities
Agency		8		11,273		(31	)		50,907		(979	)		62,180		(1,010	)
Non-agency		1		—		—			10,322		(16	)		10,322		(16	)
Corporate securities		5		2,523		(18	)		8,006		(90	)		10,529		(108	)
Other securities		—		—		—			—		—			—		—
Total		83	$	14,163	$	(50	)	$	419,683	$	(5,542	)	$	433,846	$	(5,592	)

			Less than 12 Months					12 Months or Longer					Total
December 31, 2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		18	$	23,835	$	(52	)	$	9,865	$	(137	)	$	33,700	$	(189	)
U.S. Government agencies		25		43,487		(80	)		50,101		(1,216	)		93,588		(1,296	)
Obligations of states, municipalities and    political subdivisions		56		13,926		(97	)		18,563		(489	)		32,489		(586	)
Residential mortgage-backed securities
Agency		42		4,288		(45	)		254,121		(11,131	)		258,409		(11,176	)
Non-agency		8		59,107		(1,378	)		4,009		(198	)		63,116		(1,576	)
Commercial mortgage-backed securities
Agency		9		21,356		(447	)		52,640		(2,717	)		73,996		(3,164	)
Non-agency		5		—		—			30,458		(1,000	)		30,458		(1,000	)
Corporate securities		15		25,762		(342	)		4,642		(268	)		30,404		(610	)
Other securities		1		—		—			2,844		(131	)		2,844		(131	)
Total		179	$	191,761	$	(2,441	)	$	427,243	$	(17,287	)	$	619,004	$	(19,728	)

			Less than 12 Months					12 Months or Longer					Total
December 31, 2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Held-to-maturity
Obligations of states, municipalities, and    political subdivisions		23	$	8,127	$	(58	)	$	8,792	$	(152	)	$	16,919	$	(210	)
Residential mortgage-backed securities
Agency		16		6,625		(150	)		21,139		(381	)		27,764		(531	)
Non-agency		7		21,499		(503	)		12,931		(416	)		34,430		(919	)
Total		46	$	36,251	$	(711	)	$	42,862	$	(949	)	$	79,113	$	(1,660	)

22

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Certainsecuritieshave fairvalueslessthanamortizedcostand, therefore,containunrealizedlosses.TheCompany evaluatedthesecuritieswhich had an unrealizedlossfor other than temporary impairment and determined alldeclinesin valueto be temporary.Therewere 83 securities available-for-sale with unrealizedlossesat June 30, 2019. There were no securities held-to-maturity with unrealizedlossesat June 30, 2019.The Company anticipatesfullrecoveryof amortizedcostwith respectto thesesecuritiesby maturity,or sooner,in theeventof a morefavorablemarketinterestrate environment.The Company does not intendto sellthesesecuritiesand itisnot morelikelythannot thatthe Company willbe requiredto sellthembeforerecoveryof theiramortizedcostbasis,which maybe atmaturity.

The proceeds from all sales of securitiesavailable-for-sale,and theassociatedgainsand losses,for the three and six months ended June 30, 2019 and 2018 are listed below:

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Proceeds	$	59,594	$	544	$	59,594	$	544
Gross gains		1,049		4		1,049		4
Gross losses		76		—		76		—

There were $973,000 and $4,000 in net gains reclassified fromaccumulatedothercomprehensive incomeintoearnings for the three and six months ended June 30, 2019 and 2018, respectively.

Securities pledged at June 30, 2019 and December 31, 2018 had carrying amounts of $298.3 million and $244.7 million,respectively.At June 30, 2019 and December 31, 2018, of thosepledged,thecarryingamountsof securitiespledgedas collateralforpublicfund depositswere $250.0 million and $197.8 million,respectively, and forcustomerrepurchaseagreementsof $48.3 million and $46.9 million,respectively. At June 30, 2019 and December 31, 2018, there were no securities pledged for advances from the Federal Home Loan Bank. Othersecuritieswere pledgedforderivativepositions,lettersof creditand for purposesrequiredor permittedby law. At June 30, 2019 and December 31, 2018, therewere no holdingsof securitiesof any one issuer,otherthantheU.S.Governmentand itsagencies,in an amountgreaterthan10% of stockholders’ equity.

23

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

AtJune 30, 2019, theamortizedcostand fairvalueof debtsecuritiesareshown by contractual maturity.Expectedmaturitiesmaydifferfromcontractualmaturitiesifborrowershave therightto callor prepay obligationswith or withoutcallor prepaymentpenalties.Securitiesnot due ata singlematuritydateareshown separately. 

	Amortized Cost		Fair Value
Equity and other securities, at fair value
Due after ten years	$	695	$	695
No defined maturity		6,967		6,967
Total	$	7,662	$	7,662
Available-for-sale
Due in one year or less	$	76,144	$	76,267
Due from one to five years		143,846		145,125
Due from five to ten years		98,622		100,172
Due after ten years		45,130		45,801
Mortgage-backed securities		603,892		601,664
Total	$	967,634	$	969,029
Held-to-maturity
Due from one to five years	$	3,808	$	3,862
Due from five to ten years		613		626
Total	$	4,421	$	4,488

Note 5—Loanand Lease Receivables

Outstanding loan and lease receivables as of the dates shown were categorized as follows:

	June 30,			December 31,
	2019			2018
Commercial real estate	$	1,311,539		$	1,261,594
Residential real estate		777,762			704,899
Construction, land development, and other land		251,948			186,258
Commercial and industrial		1,320,338			1,145,240
Installment and other		12,909			13,675
Lease financing receivables		185,345			187,797
Total loans and leases		3,859,841			3,499,463
Net unamortized deferred fees and costs		232			(1,293	)
Initial direct costs		3,075			3,456
Allowance for loan and lease losses		(31,132	)		(25,201	)
Net loans and leases	$	3,832,016		$	3,476,425

	June 30,			December 31,
	2019			2018
Lease financing receivables
Net minimum lease payments	$	201,848		$	204,646
Unguaranteed residual values		1,442			1,535
Unearned income		(17,945	)		(18,384	)
Total lease financing receivables		185,345			187,797
Initial direct costs		3,075			3,456
Lease financial receivables before allowance for    lease losses	$	188,420		$	191,253

24

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Total loans and leases consist of originated loans and leases, acquired impaired loans and acquired non-impaired loans and leases. At June 30, 2019 andDecember 31, 2018, total loans and leases included the guaranteed amount of U.S. government guaranteed loans of $145.5 million and $108.7 million, respectively. At June 30, 2019 and December 31, 2018, installment and other loans included overdraft deposits of $771,000 and $1.7 million, respectively, which were reclassified as loans. At June 30, 2019 and December 31, 2018, loans and loans held for sale pledged as security for borrowings were $1.5billion and $1.4billion.

The minimumannualleasepaymentsforleasefinancingreceivablesas of June 30, 2019 are summarizedas follows:

	Minimum Lease Payments
2019	$	37,931
2020		66,850
2021		47,648
2022		30,628
2023		15,308
Thereafter		3,483
Total	$	201,848

Originatedloansand leasesrepresentoriginations excluding loans initially acquired in a business combination. However, once an acquired non-impaired loan reaches its maturity date, and is re-underwritten and renewed, it is internally classified as an originated loan. Acquiredimpaired loansareloansacquiredfroma businesscombinationwith evidenceof creditqualitydeteriorationand are accountedforunderASC Topic 310-30. Acquirednon-impairedloansand leasesrepresentloansand leasesacquired froma businesscombinationwithoutevidenceof creditqualitydeteriorationand areaccountedforunderASC Topic 310-20. Leasesand revolvingloans do not qualify to be accounted for as acquired impaired loans and are accountedforunderASC Topic 310-20. The followingtablessummarizethebalancesforeachrespectiveloanand leasecategoryas of June 30, 2019 and December 31, 2018:

June 30, 2019	Originated		Acquired Impaired		Acquired Non- Impaired		Total
Commercial real estate	$	721,230	$	151,127	$	439,182	$	1,311,539
Residential real estate		501,038		118,534		158,190		777,762
Construction, land development, and other land		196,656		4,220		51,072		251,948
Commercial and industrial		992,313		20,370		307,887		1,320,570
Installment and other		10,937		300		1,672		12,909
Lease financing receivables		162,119		—		26,301		188,420
Total loans and leases	$	2,584,293	$	294,551	$	984,304	$	3,863,148

December 31, 2018	Originated		Acquired Impaired		Acquired Non- Impaired		Total
Commercial real estate	$	652,234	$	146,808	$	462,565	$	1,261,607
Residential real estate		466,309		113,934		124,659		704,902
Construction, land development, and other land		144,128		3,779		37,442		185,349
Commercial and industrial		803,508		12,617		328,672		1,144,797
Installment and other		11,718		404		1,596		13,718
Lease financing receivables		159,901		—		31,352		191,253
Total loans and leases	$	2,237,798	$	277,542	$	986,286	$	3,501,626

25

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Acquired impaired loans—As part of the First Evanston acquisition, the Bank acquired impaired loans that are accounted for under ASC 310-30 in the amount of $25.0 million. As part of the Oak Park River Forest acquisition, the Bank acquired impaired loans in the amount of $48.6 million. Refer to Note 3—Acquisitions for additional information regarding the transaction.The following table presents a reconciliation of the undiscounted contractual cash flows, non-accretable difference, accretable yield, and fair value of acquired impaired loans as of the acquisition date of May 31, 2018 (First Evanston) and April 30, 2019 (Oak Park River Forest):

	First Evanston			Oak Park River Forest
Undiscounted contractual cash flows	$	33,594		$	65,223
Undiscounted cash flows not expected to be collected (non-accretable difference)		(5,003	)		(8,158	)
Undiscounted cash flows expected to be collected		28,591			57,065
Accretable yield at acquisition		(3,566	)		(8,501	)
Estimated fair value of impaired loans acquired at acquisition	$	25,025		$	48,564

The outstandingbalanceand carryingamountof allacquiredimpairedloansaresummarizedbelow. The balancesdo not includean allowanceforloanand leaselossesof $3.5 million and $2.7 million,at June 30, 2019 and December 31, 2018, respectively.

	June 30, 2019				December 31, 2018
	Outstanding Balance		Carrying Value		Outstanding Balance		Carrying Value
Commercial real estate	$	205,109	$	151,127	$	216,137	$	146,808
Residential real estate		169,171		118,534		173,962		113,934
Construction, land development, and other land		13,348		4,220		11,962		3,779
Commercial and industrial		30,041		20,370		24,972		12,617
Installment and other		1,131		300		1,735		404
Total acquired impaired loans	$	418,800	$	294,551	$	428,768	$	277,542

The following table summarizes the changes in accretable yield for acquired impaired loans for the three and six months ended June 30, 2019 and 2018: 

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Beginning balance	$	29,340		$	39,300		$	37,115		$	36,446
Additions		8,501			3,566			8,501			3,566
Accretion to interest income		(5,996	)		(5,871	)		(11,245	)		(11,562	)
Reclassification from nonaccretable difference, net		14,693			4,311			12,167			12,856
Ending balance	$	46,538		$	41,306		$	46,538		$	41,306

26

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Acquired non-impaired loans and leases—The Company acquired non-impaired loans as part of the First Evanston acquisition in the amount of $891.0 million. The Company acquired non-impaired loans as part of the Oak Park River Forest acquisition in the amount of $212.6 million. Refer to Note 3—Acquisitions for additional information regarding the transaction.

The unpaidprincipalbalanceand carryingvalueforacquirednon-impairedloansand leasesat June 30, 2019 and December 31, 2018 were as follows:

	June 30, 2019				December 31, 2018
	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
Commercial real estate	$	449,734	$	439,182	$	473,262	$	462,565
Residential real estate		160,844		158,190		127,478		124,659
Construction, land development, and other land		52,459		51,072		38,494		37,442
Commercial and industrial		317,902		307,887		344,879		328,672
Installment and other		1,714		1,672		1,831		1,596
Lease financing receivables		27,958		26,301		32,977		31,352
Total acquired non-impaired loans and leases	$	1,010,611	$	984,304	$	1,018,921	$	986,286

Note 6—Allowance forLoanand Lease Losses and ReserveforUnfundedCommitments

Loans and leasesconsideredforinclusionin theallowanceforloanand leaselossesincludeacquired non-impairedloansand leases,thoseacquiredimpairedloanswith creditdeteriorationafteracquisition,and originatedloansand leases.Although allacquiredloansand leasesareincludedin the followingtable,only thosewith creditdeteriorationsubsequentto acquisitiondateareactuallyincludedin the allowanceforloanand leaselosses.

27

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The followingtablessummarizethebalanceand activitywithintheallowanceforloanand leaselosses, thecomponentsof theallowanceforloanand leaselossesin termsof loansand leasesindividuallyand collectivelyevaluatedforimpairment,and correspondingloanand leasebalancesby typefor the three and six months ended June 30, 2019 and 2018 are as follows:

June 30, 2019	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land		Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Allowance for loan and lease losses
Three months ended
Beginning balance	$	6,660		$	1,970		$	536	$	15,630		$	63		$	2,247		$	27,106
Provisions		2,695			(62	)		155		3,320			8			275			6,391
Charge-offs		(818	)		(9	)		—		(1,827	)		(4	)		(622	)		(3,280	)
Recoveries		397			272			—		3			—			243			915
Ending balance	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132
Six months ended
Beginning balance	$	7,540		$	1,751		$	466	$	12,932		$	49		$	2,463		$	25,201
Provisions		3,137			156			225		6,352			22			498			10,390
Charge-offs		(2,169	)		(9	)		—		(2,179	)		(4	)		(1,267	)		(5,628	)
Recoveries		426			273			—		21			—			449			1,169
Ending balance	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132
Ending balance:
Individually evaluated for    impairment	$	2,775		$	22		$	—	$	6,489		$	—		$	—		$	9,286
Collectively evaluated for    impairment		4,433			1,559			676		9,495			65			2,143			18,371
Loans acquired with deteriorated    credit quality		1,726			590			15		1,142			2			—			3,475
Total allowance for loan and lease    losses	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132

June 30, 2019	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Loans and leases ending balance:
Individually evaluated for    impairment	$	18,707	$	2,899	$	—	$	24,278	$	—	$	—	$	45,884
Collectively evaluated for    impairment		1,141,705		656,329		247,728		1,275,922		12,609		188,420		3,522,713
Loans acquired with deteriorated    credit quality		151,127		118,534		4,220		20,370		300		—		294,551
Total loans and leases	$	1,311,539	$	777,762	$	251,948	$	1,320,570	$	12,909	$	188,420	$	3,863,148

28

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

June 30, 2018	Commercial Real Estate			Residential Real Estate		Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Allowance for loan and lease losses
Three months ended
Beginning balance	$	5,319		$	1,564	$	201		$	7,763		$	61		$	2,732		$	17,640
Provisions		1,336			84		131			1,956			1			448			3,956
Charge-offs		(202	)		—		—			(1,596	)		(32	)		(555	)		(2,385	)
Recoveries		—			—		—			246			—			230			476
Ending balance	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687
Six months ended
Beginning balance	$	4,794		$	1,638	$	222		$	7,418		$	41		$	2,593		$	16,706
Provisions		2,270			10		528			5,380			21			862			9,071
Charge-offs		(611	)		—		(418	)		(4,681	)		(32	)		(1,065	)		(6,807	)
Recoveries		—			—		—			252			—			465			717
Ending balance	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687
Ending balance:
Individually evaluated for    impairment	$	2,199		$	127	$	—		$	2,555		$	14		$	—		$	4,895
Collectively evaluated for    impairment		2,752			1,171		310			4,940			13			2,855			12,041
Loans acquired with deteriorated    credit quality		1,502			350		22			874			3			—			2,751
Total allowance for loan and lease    losses	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687

June 30, 2018	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Loans and leases ending balance:
Individually evaluated for    impairment	$	16,397	$	2,273	$	—	$	14,889	$	14	$	—	$	33,573
Collectively evaluated for    impairment		1,055,969		567,578		183,756		995,584		12,271		186,875		3,002,033
Loans acquired with deteriorated    credit quality		162,621		129,737		4,860		15,347		521		—		313,086
Total loans and leases	$	1,234,987	$	699,588	$	188,616	$	1,025,820	$	12,806	$	186,875	$	3,348,692

The Company increased the allowance for loan and lease losses by $4.0 million and $5.9 million for the three and six months ended June 30, 2019, respectively. The Company increased the allowance for loan and lease losses by $2.0 million and $3.0 million for the three and six months ended June 30, 2018, respectively. For acquired impaired loans, the Company increased the allowance for loan and lease losses by $629,000 and $740,000 for the three and six months ended June 30, 2019, respectively. The Company decreased the allowance for loans and lease losses for acquired impaired loans by $778,000 and $1.1 million for the three and six months ended June 30, 2018, respectively.

29

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

For loans individually evaluated for impairment, the Company increased the allowance for loan and lease losses by $1.7 million and $2.6 million for thethree and six months ended June 30, 2019, respectively. The Company increased the allowance for loan and lease losses by $193,000 and $930,000 for the three and six months ended June 30, 2018, respectively.For loans collectively evaluated for impairment, the Company increased the allowance for loan and lease losses by $1.7 million and $2.6 million for the three and six months ended June 30, 2019, respectively. The Company increased the allowance for loan and lease losses by $2.6 million and $3.2 million for the three and six months ended June 30, 2018, respectively.

The followingtablessummarizetherecordedinvestment,unpaidprincipalbalance, and relatedallowanceforloansand leasesconsideredimpaired as of June 30, 2019 and December 31, 2018, which excludes acquired impaired loans:

June 30, 2019	Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded
Commercial real estate	$	8,286	$	11,436	$	—
Residential real estate		2,688		2,742		—
Commercial and industrial		11,873		15,319		—
With an allowance recorded
Commercial real estate		10,421		11,024		2,775
Residential real estate		211		237		22
Commercial and industrial		12,405		13,407		6,489
Total impaired loans	$	45,884	$	54,165	$	9,286

December 31, 2018	Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded
Commercial real estate	$	6,110	$	7,693	$	—
Residential real estate		1,886		1,858		—
Commercial and industrial		11,193		13,961		—
With an allowance recorded
Commercial real estate		5,873		6,313		2,191
Residential real estate		251		253		61
Commercial and industrial		10,601		11,153		4,397
Total impaired loans	$	35,914	$	41,231	$	6,649

The following tables summarize the average recorded investment and interest income recognized for loans and leases considered impaired, which excludes acquired impaired loans, for the six months ended as follows:

June 30, 2019	Average Recorded Investment		Interest Income Recognized
With no related allowance recorded
Commercial real estate	$	8,094	$	187
Residential real estate		1,785		27
Commercial and industrial		11,583		223
With an allowance recorded
Commercial real estate		6,793		155
Residential real estate		219		4
Commercial and industrial		12,043		247
Total impaired loans	$	40,517	$	843

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

June 30, 2018	Average Recorded Investment		Interest Income Recognized
With no related allowance recorded
Commercial real estate	$	10,013	$	436
Residential real estate		1,959		25
Commercial and industrial		7,283		99
With an allowance recorded
Commercial real estate		4,587		183
Residential real estate		347		3
Commercial and industrial		8,784		233
Installment and other		14		979
Total impaired loans	$	32,987	$	1,958

For purposesof thesetables,theunpaidprincipalbalancerepresentstheoutstandingcontractualbalance. Impairedloansincludeloansthatareindividuallyevaluatedforimpairmentas wellas troubleddebt restructuringsforallloancategories.The sumof non-accrualloansand loanspastdue 90 days stillon accrual willdifferfromthetotalimpairedloanamount.

The followingtablessummarizetheriskratingcategoriesof theloansand leasesconsideredfor inclusionin theallowanceforloanand leaselossescalculation,excludingacquiredimpairedloans,as of June 30, 2019 and December 31, 2018:

June 30, 2019	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Pass	$	1,036,018	$	620,414	$	217,408	$	1,068,796	$	12,565	$	184,922	$	3,140,123
Watch		87,111		32,703		30,320		152,953		38		28		303,153
Special Mention		16,837		3,581		—		48,567		—		2,295		71,280
Substandard		20,446		2,530		—		29,884		6		319		53,185
Doubtful		—		—		—		—		—		856		856
Loss		—		—		—		—		—		—		—
Total	$	1,160,412	$	659,228	$	247,728	$	1,300,200	$	12,609	$	188,420	$	3,568,597

December 31, 2018	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Pass	$	1,009,041	$	553,665	$	147,123	$	962,291	$	9,997	$	188,314	$	2,870,431
Watch		76,276		29,522		31,376		112,996		3,302		80		253,552
Special Mention		17,602		5,656		3,071		34,314		—		1,794		62,437
Substandard		11,880		2,125		—		22,579		15		818		37,417
Doubtful		—		—		—		—		—		247		247
Loss		—		—		—		—		—		—		—
Total	$	1,114,799	$	590,968	$	181,570	$	1,132,180	$	13,314	$	191,253	$	3,224,084

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The following tables summarize contractual delinquency information for acquired non-impaired and originated loans and leases by category at June 30, 2019 and December 31, 2018:

June 30, 2019	30-59 Days Past Due		60-89 Days Past Due		Greater than 90 Days and Accruing		Non- accrual		Total Past Due		Current		Total
Commercial real estate	$	4,261	$	3,665	$	996	$	12,220	$	21,142	$	1,139,270	$	1,160,412
Residential real estate		1,311		—		—		2,335		3,646		655,582		659,228
Construction, land development, and    other land		—		—		—		—		—		247,728		247,728
Commercial and industrial		4,387		1,943		—		18,610		24,940		1,275,260		1,300,200
Installment and other		88		50		—		6		144		12,465		12,609
Lease financing receivables		845		319		—		856		2,020		186,400		188,420
Total	$	10,892	$	5,977	$	996	$	34,027	$	51,892	$	3,516,705	$	3,568,597

December 31, 2018	30-59 Days Past Due		60-89 Days Past Due		Greater than 90 Days and Accruing		Non- accrual		Total Past Due		Current		Total
Commercial real estate	$	6,659	$	2,145	$	—	$	9,484	$	18,288	$	1,096,511	$	1,114,799
Residential real estate		4,488		711		—		1,815		7,014		583,954		590,968
Construction, land development, and    other land		—		—		—		—		—		181,570		181,570
Commercial and industrial		5,829		1,376		—		13,932		21,137		1,111,043		1,132,180
Installment and other		1,932		4		—		12		1,948		11,366		13,314
Lease financing receivables		789		530		—		591		1,910		189,343		191,253
Total	$	19,697	$	4,766	$	—	$	25,834	$	50,297	$	3,173,787	$	3,224,084

Trouble debt restructurings are granted due to borrower financial difficulty and provide for a modification of loan repayment terms. TDRs are treated in the same manner as impaired loans for purposes of calculating the allowance for loan and lease losses. The tables below present TDRs by loan category as of June 30, 2019 and December 31, 2018:

June 30, 2019	Number of Loans		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Charge-offs		Specific Reserves
Accruing:
Commercial real estate		3	$	1,105	$	1,105	$	—	$	198
Commercial and industrial		2		214		214		—		126
Residential real estate		2		210		210		—		—
Total accruing		7		1,529		1,529		—		324
Non-accruing:
Commercial real estate		10		3,465		2,970		495		253
Commercial and industrial		8		6,735		4,864		1,871		1,278
Total non-accruing		18		10,200		7,834		2,366		1,531
Total troubled debt restructurings		25	$	11,729	$	9,363	$	2,366	$	1,855

32

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

December 31, 2018	Number of Loans		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Charge-offs		Specific Reserves
Accruing:
Commercial real estate		4	$	1,508	$	1,508	$	—	$	113
Commercial and industrial		2		191		191		—		100
Residential real estate		1		114		114		—		—
Total accruing		7		1,813		1,813		—		213
Non-accruing:
Commercial real estate		9		2,512		2,471		41		743
Commercial and industrial		6		6,714		4,843		1,871		1,290
Total non-accruing		15		9,226		7,314		1,912		2,033
Total troubled debt restructurings		22	$	11,039	$	9,127	$	1,912	$	2,246

In addition,therewas a $500,000 commitment outstanding on troubled debt restructurings at June 30, 2019 and December 31, 2018.

Loans modifiedas troubleddebtrestructuringsthatoccurredduringthe three and six months ended June 30, 2019 and 2018:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Accruing:
Beginning balance	$	1,921		$	1,037		$	1,813		$	1,061
Additions		—			37			113			37
Net payments		(44	)		(24	)		(49	)		(48	)
Net transfers from (to) non-accrual		(348	)		188			(348	)		188
Ending balance		1,529			1,238			1,529			1,238
Non-accruing:
Beginning balance		7,119			1,093			7,314			1,569
Additions		1,182			5,332			1,428			5,332
Net payments		(815	)		(461	)		(726	)		(793	)
Charge-offs		—			—			(530	)		(144	)
Net transfers from (to) accrual		348			(188	)		348			(188	)
Ending balance		7,834			5,776			7,834			5,776
Total troubled debt restructurings		9,363			7,014			9,363			7,014

Troubled debt restructurings that subsequently defaulted within twelve months of the restructure date during the three and six months ended June 30, 2019 and 2018 had a recorded investment of $348,000 and $340,000, respectively.

At June 30, 2019 and December 31, 2018, thereserveforunfundedcommitmentswas $1.3 million and $1.2 million, respectively. During the three and six months ended June 30, 2019, the provision forunfundedcommitments was $183,000 and $28,000, respectively. During the three and six months ended June 30, 2018, the credit to and provision for unfunded commitments was $29,000 and $84,000, respectively. Therewere no charge-offsor recoveriesrelatedto thereservefor unfundedcommitmentsduringthe periods.

33

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 7—ServicingAssets

Activityforservicingassetsand therelatedchangesin fairvalue for the three and six months ended June 30, 2019 and 2018 is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Beginning balance	$	19,534		$	21,615		$	19,693		$	21,400
Additions, net		1,449			2,046			2,551			4,148
Changes in fair value		(1,223	)		(2,074	)		(2,484	)		(3,961	)
Ending balance	$	19,760		$	21,587		$	19,760		$	21,587

Loans servicedforothersarenot includedin theConsolidatedStatementsof FinancialCondition.The unpaidprincipalbalancesof theseloansservicedforothers as of June 30, 2019 and December 31, 2018 were as follows:

	June 30,		December 31,
	2019		2018
Loan portfolios serviced for:
SBA guaranteed loans	$	1,174,929	$	1,151,915
USDA guaranteed loans		106,758		106,184
Total	$	1,281,687	$	1,258,099

Loan servicing revenue totaled $2.6 and $2.5 million for the three months ended June 30, 2019 and 2018, respectively. Loan servicing revenue totaled $5.2 and $5.0 million for the six months ended June 30, 2019 and 2018, respectively. Loan servicing asset revaluation, which represents the changes in fair value of servicing assets, resulted in downward valuations of $1.2 and $2.1 million for the three months ended June 30, 2019 and 2018, respectively. Loan servicing asset revaluation resulted in downward valuations of $2.5 and $4.0 million for the six months ended June 30, 2019 and 2018, respectively.

The fairvalueof servicingrightsishighlysensitiveto changesin underlyingassumptions.Changes in prepaymentspeedassumptionshave themostsignificantimpacton thefairvalueof servicingrights.

Generally, as interest rates rise on variable rate loans, loan prepayments increase due to an increase in refinance activity, which may result in a decrease in the fair value of servicing assets. Measurement of fair value is limited to the conditions existing and the assumptions used as of a particular point in time, and those assumptions may change over time. Refer to Note 16—Fair Value Measurement for further details.

Note 8—Other Real Estate Owned

The following table presents the change in other real estate owned (“OREO”) for the three and six months ended June 30, 2019 and 2018:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Beginning balance	$	4,799		$	10,466		$	5,314		$	10,626
Acquisitions of OREO through business    combination		2,201			—			2,201			—
Net additions to OREO		1,846			176			2,076			1,220
Proceeds from sales of OREO		(703	)		(3,859	)		(1,331	)		(5,122	)
Gains (losses) on sales of OREO		6			(249	)		(27	)		(109	)
Valuation adjustments		(79	)		(132	)		(163	)		(213	)
Ending balance	$	8,070		$	6,402		$	8,070		$	6,402

34

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

At June 30, 2019 andDecember 31, 2018, the balance of real estate owned included $649,000 and $838,000, respectively, of foreclosed residential real estate properties recorded as a result of obtaining physical possession of the property.

At June 30, 2019 and December 31, 2018, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process is $1.9 million and $2.3 million, respectively.

Proceeds from sales of OREO include proceeds from internally financed sales of OREO of $183,000 for the six months ended June 30, 2019. There were no internally financed sales of OREO for the three months ended June 30, 2019. Proceeds from internally financed sales of OREO were $444,000 for the three and six months ended June 30, 2018.

Note 9—Goodwill, Core Deposit Intangible and Other Intangible Assets

The following tables summarize the changes in the Company’s goodwill, core deposit intangible assets, and customer relationship intangible assets for the three and six months ended June 30, 2019 and 2018:  

	Six Months Ended June 30,
	2019								2018
	Goodwill		CoreDeposit Intangible			Customer Relationship Intangible			Goodwill		CoreDeposit Intangible			Customer Relationship Intangible
Beginning balance	$	128,177	$	30,360		$	3,059		$	54,562	$	16,720		$	—
Additions		17,461		6,220			—			72,974		19,060			3,216
Amortization		—		(3,598	)		(133	)		—		(1,863	)		(22	)
Ending balance	$	145,638	$	32,982		$	2,926		$	127,536	$	33,917		$	3,194
Accumulated amortization	N/A		$	22,484		$	290		N/A		$	15,329		22
Weighted average remaining    amortization period	N/A		7.0 Years			10.9 Years			N/A		7.4 Years			11.9 Years

	Three Months Ended June 30,
	2019								2018
	Goodwill		CoreDeposit Intangible			Customer Relationship Intangible			Goodwill		CoreDeposit Intangible			Customer Relationship Intangible
Beginning balance	$	128,177	$	28,654		$	2,992		$	54,562	$	15,959		$	—
Additions		17,461	$	6,220			—			72,974		19,060			3,216
Amortization		—		(1,892	)		(66	)		—		(1,102	)		(22	)
Ending balance	$	145,638	$	32,982		$	2,926		$	127,536	$	33,917		$	3,194
Accumulated amortization	N/A		$	22,484		$	290		N/A		$	15,329		22
Weighted average remaining    amortization period	N/A		7.0 Years			10.9 Years			N/A		7.4 Years			11.9 Years

The Company added additional goodwill, core deposit intangible assets, and customer relationship intangible assets in conjunction with the Oak Park River Forest and First Evanston acquisitions. Please refer to Note 3—Acquisitions for further details.

35

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The following table presents the estimated amortization expense for core deposit intangible, customer relationship intangible, and other intangible assets recognized atJune 30, 2019:

	Estimated Amortization
2019	$	4,006
2020		7,571
2021		6,997
2022		6,426
2023		4,370
Thereafter		6,538
Total	$	35,908

Note 10—IncomeTaxes

The Company uses an estimated annual effective tax rate method in computing its interim tax provision. This effective tax rate is based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates.

The effective tax rate for the six months ended June 30, 2019 and 2018 was 27.7% and 20.0%, respectively. The Company recorded discrete income tax benefit of $65,000 and $211,000 related to the exercise of stock options and vesting of restricted shares for the six months ended June 30, 2019 and 2018, respectively. The current effective tax rate reflects the passage of the Tax Cuts and Jobs Act (the “Tax Act”), which was enacted on December 22, 2017. Among other things, the Tax Act reduces the corporate federal income tax rate from 35% to 21%, effective January 1, 2018. Also on December 22, 2017, the SEC issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the Tax Act’s impact. SAB 118 provides a measurement period, not to extend beyond one year from the date of enactment during which a company, acting in good faith, may complete the accounting for the impacts of the Tax Act. The Company recorded an additional discrete income tax benefit of $724,000 during the first quarter of 2018. This adjustment includes the impact of the federal income tax rate decrease due to the Tax Act (enacted on December 22, 2017) on our net deferred tax assets.

Net deferred tax assets increased to$35.7 million at June 30, 2019 compared to $35.6 million at December 31, 2018. The net increase in the total net deferred tax assets recorded as of June 30, 2019 was a result of $4.9 million in net deferred tax assets related to the acquisition of Oak Park River Forest, offset by a decrease in net deferred tax assets related to unrealized losses on available-for-sale securities and utilization of operating loss carryforwards during the period.

36

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 11—Deposits

The composition of deposits was as follows as of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Non-interest-bearing demand deposits	$	1,240,375	$	1,192,873
Interest-bearing checking accounts		345,081		296,339
Money market demand accounts		728,954		640,401
Other savings		480,756		476,418
Time deposits (below $250,000)		980,162		911,603
Time deposits ($250,000 and above)		284,915		232,282
Total deposits	$	4,060,243	$	3,749,916

Time deposits of $250,000 or more included $70.0 million and $50.0 million of brokered deposits at June 30, 2019 and December 31, 2018, respectively.

Note 12—FederalHomeLoanBankAdvances

The followingtablesummarizestheFHLBadvancesas of June 30, 2019 and December 31, 2018: 

	June 30,			December 31,
	2019			2018
Federal Home Loan Bank advances	$	500,000		$	425,000
Weighted average cost		2.42	%		2.56	%

At June 30, 2019, fixed-rate advances totaled $500.0 million with interest rates ranging from 2.40% to 2.45%and maturities ranging from July 2019 to September 2019.The Company’sadvancesfromtheFHLBarecollateralizedby residentialrealestateloan, commercial real estate loans, and securities. The Company’s required investment in FHLB stock is $4.50 for every $100 in advances. At June 30, 2019 and December 31, 2018, the Bank has additional borrowing capacity from the FHLB of $1.2 billion and $1.3 billion, respectively, subject to the availability of proper collateral. The Bank’s maximumborrowingcapacityislimitedto 35% of totalassets.

The Company hedgesinterestrateson borrowedfundsusinginterestrateswaps throughwhich the Company receivesvariableamountsand pays fixedamounts.Referto Note 17—DerivativeInstrumentsand Hedging Activitiesforadditionalinformation.

37

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 13—Other Borrowings

The following is a summary of the Company’s other borrowings as of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Securities sold under agreements to repurchase	$	32,885	$	34,166
Line of credit		—		—
Total	$	32,885	$	34,166

Securitiessoldunderagreementsto repurchaserepresenta demanddepositproductofferedto customers thatsweep balancesin excessof theFDICinsurancelimitintoovernightrepurchaseagreements.The Company pledgessecuritiesas collateralfortherepurchaseagreements.Referto Note 4—Securitiesforadditional discussion.

OnOctober13,2016,theCompany enteredintoa$30.0million creditagreementwitha correspondent bank.In April 2017, the revolving line of credit was amended to a non-revolving line of credit as long as the outstanding balance exceeds $5.0 million. When the outstanding balance is reduced to $5.0 million, the line of credit will be converted to a revolving line of credit with credit availability up to $5.0 million until maturity. In July 2017, the Company repaid the outstanding balance, in full, under this line of credit of $16.2 million with proceeds from its initial public offering (“IPO”). The line of credit matured on October 11, 2018 and carried an interest rate at either the London Interbank Offered Rate (“LIBOR”) plus 250 basis points or the Prime Rate minus 25 basis points, based on the Company’s election. On October 11, 2018, the Company entered into a third amendment to the revolving credit agreement, which increased the revolving loan commitment to $10.0 million, extended the maturity of the credit facility to October 10, 2019, and makes certain other changes, including a release of the previously executed Stock Pledge Agreement dated October 13, 2016 and execution of a Negative Pledge Agreement dated October 11, 2018. The amended revolving line of credit bears interest at either the LIBOR plus 225 basis points or the Prime Rate minus 50 basis points, based on the Company’s election, which is required to be communicated at least three business days prior to the commencement of an interest period. If the Company fails to provide timely notification, the interest rate will be Prime Rate minus 50 basis points. At June 30, 2019 and December 31, 2018, the line of credit had no outstanding balance, therefore an interest rate option has not been selected.

On April 30, 2019, the Company drew on the line of credit for $5.7 million and selected the LIBOR plus 225 basis points interest rate option. The funds were utilized to repay a line of credit assumed as a result of the Oak Park River Forest acquisition. The Company repaid the $5.7 million outstanding balance of the line of credit in full on May 31, 2019.

The followingtablepresentsshort-termcreditlinesavailableforuse, forwhich theCompany did not have an outstandingbalanceas of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Federal Reserve Bank of Chicago discount window line	$	278,816	$	293,613
Available federal funds lines		105,000		55,000

38

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 14—Junior Subordinated Debentures

At June 30, 2019 and December 31, 2018, theCompany’sjuniorsubordinateddebenturesby issuancewere as follows:

Name of Trust	Aggregate Principal Amount June 30, 2019			Aggregate Principal Amount December 31, 2018			Stated Maturity	Contractual Rate at June 30, 2019			Interest Rate Spread
MetropolitanStatutory Trust 1	$	35,000		$	35,000		March17, 2034		5.20	%	Three-month LIBOR + 2.79%
RidgeStone Capital Trust I		1,500			1,500		June 30, 2033		6.38	%	Five-year LIBOR + 3.50%
First Evanston Bancorp Trust I		10,000			10,000		March 15, 2035		4.19	%	Three-month LIBOR + 1.78%
Total liability, at par		46,500			46,500
Discount		(9,441	)		(9,732	)
Total liability, at carrying value	$	37,059		$	36,768

In 2004, theCompany’spredecessor,MetropolitanBank Group, Inc.,issued$35.0 millionfloatingrate juniorsubordinateddebenturesto MetropolitanStatutoryTrust1, which was formedfortheissuanceof trust preferredsecurities.The debenturesbearinterestatthree-month LIBOR plus 2.79% (5.20%and 5.58% atJune 30, 2019 and December 31, 2018, respectively).Interestispayablequarterly.The Company has therightto redeemthedebentures,in whole or in part,on any interestpaymentdateon or after March2009. Accruedinterestpayablewas $73,000 and $84,000 as of June 30, 2019 and December 31, 2018, respectively.

As part of the Ridgestone acquisition, the Company assumed the obligations to RidgeStone Capital Trust I of $1.5 million in principal amount, which was formed for the issuance of trust preferred securities. Beginning on June 30, 2008, the interest rate reset to the five-year LIBOR plus 3.50% (6.38% at June 30, 2019 and December 31, 2018), which is in effect until June 30, 2023 and updated every five years. Interest is paid on a quarterly basis. The Company has the right to redeem the debentures, in whole or in part, on any interest payment date on or after June 30, 2008.There was no accrued interest payable as of June 30, 2019 or December 31, 2018.

As part of the First Evanston acquisition, the Company assumed the obligations to First Evanston Bancorp Trust I of $10.0 million in principal amount, which was formed for the issuance of trust preferred securities. Refer to Note 3—Acquisitions for additional information. Beginning on March 15, 2010, the interest rate reset to the three-month LIBOR plus 1.78% (4.19% and 4.57% at June 30, 2019 and December 31, 2018, respectively), which is in effect until the debentures mature in 2035. Interest is paid on a quarterly basis. The Company has the right to redeem the debentures, in whole or in part, on any interest payment date on or after March 2010. The Company has the option to defer interest payments on the debentures from time to time for a period not to exceed five consecutive years. Accruedinterestpayablewas $18,000 and $21,000 as of June 30, 2019 and December 31, 2018, respectively.

The Trustsarenot consolidatedwith theCompany. Accordingly,theCompany reportsthesubordinated debenturesheldby theTrustsas liabilities.The Company owns allof thecommonsecuritiesof eachtrust.The juniorsubordinateddebenturesqualify,and aretreatedas, Tier1 regulatorycapitalof theCompany subjectto regulatorylimitations.The trustpreferredsecuritiesissuedby eachtrustrankequallywith thecommonsecurities in rightof payment,exceptthatifan eventof defaultundertheindenturegoverningthenoteshas occurredand is continuing,thepreferredsecuritieswillrankseniorto thecommonsecuritiesin rightof payment.

Note 15—Commitmentsand Contingent Liabilities

Legalcontingencies—Intheordinarycourseofbusiness,theCompanyandBankhavevarious outstandingcommitmentsandcontingentliabilitiesthatarenotrecognizedintheaccompanyingconsolidated financialstatements.Inaddition,theCompanymaybeadefendantincertainclaimsandlegalactionsarisinginthe ordinarycourseofbusiness.Intheopinionofmanagement,afterconsultationwithlegalcounsel,theultimate dispositionofthesemattersiscurrentlynotexpectedtohaveamaterialadverseeffectonthe Company’s Consolidated Financial Statements.

39

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Operatingleasecommitments—The Company has enteredintovariousoperatingleaseagreements primarilyforfacilitiesand landon which bankingfacilitiesarelocated.Certainleaseagreementshave renewal optionsattheend of theoriginalleasetermand certainleaseagreementshave escalationclausesin therent payments.

The minimumannualrentalcommitmentsforoperatingleasessubsequentto June 30, 2019, exclusiveof taxesand othercharges,aresummarizedas follows:

	MinimumRental Commitments
2019	$	2,173
2020		4,042
2021		3,589
2022		2,017
2023		1,077
Thereafter		3,156
Total	$	16,054

The Company’srentalexpensesforthe six months ended June 30, 2019 and 2018 were $2.8 million. Rental expenses for the three months ended June 30, 2019 and 2018 were $1.5 million and $1.6 million, respectively. During the six months ended June 30, 2019 and 2018, theCompany received $370,000 and $346,000, respectively,in subleaseincomewhich isincludedin the ConsolidatedStatementsof Operationsas a reductionof occupancyexpense. Sublease income for the three months ended June 30, 2019 and 2018 was $190,000 and $175,000, respectively. The total amount of minimum rentals to be received in the future on these subleases is approximately $1.5 million, and the leases have contractual lives extending through 2025. In additionto theabove requiredleasepayments, the Company has contractualobligationsrelated primarilyto informationtechnologycontractsand othermaintenancecontracts. In June 2018, the Company accrued $8.1 million in data processing expense primarily related to contract termination with its core service provider in anticipation of a future system conversion. As of June 30, 2019, there was no remaining contract termination balance.

Commitmentsto extend credit—The Company ispartyto financialinstrumentswith off-balancesheetrisk in thenormalcourseof businessto meetthefinancingneedsof itscustomers.These financialinstrumentsinclude commitmentsto extendcreditand standbylettersof credit.Those instrumentsinvolve,to varyingdegrees, elementsof creditand interestrateriskin excessof theamountrecognizedin theConsolidatedStatementsof FinancialCondition.The contractualor notionalamountsof thoseinstrumentsreflecttheextentof involvement theCompany has in particularclassesof financialinstruments.

The Company’s exposureto creditlossin theeventof non-performanceby theotherpartyto thefinancial instrumentforcommitmentsto extendcreditand lettersof creditisrepresentedby thecontractualor notionalamountof thoseinstruments.The Company usesthesamecreditpoliciesin makingcommitmentsand conditionalobligationsas itdoes forfundedinstruments.The Company does not anticipateany materiallossesas a resultof thecommitmentsand lettersof credit.

The followingtablesummarizesthecontractor notionalamountof outstandingloanand lease commitmentsatJune 30, 2019 and December 31, 2018:

	June 30, 2019						December 31, 2018
	Fixed Rate		VariableRate		Total		FixedRate		VariableRate		Total
Commitments to extend credit	$	62,653	$	942,348	$	1,005,001	$	74,099	$	928,991	$	1,003,090
Letters of credit		3,607		35,519		39,126		1,982		34,071		36,053
Total	$	66,260	$	977,867	$	1,044,127	$	76,081	$	963,062	$	1,039,143

40

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Commitmentsto extendcreditareagreementsto lendto a customeras long as thereisno violationof any conditionestablishedin thecontract.Commitmentsgenerallyhave fixedexpirationdatesor other terminationclausesand mayrequirepaymentof a fee.Sincemanyof thecommitmentsareexpectedto expire withoutbeingdrawn upon, thetotalcommitmentamountdoes not necessarilyrepresentfuturecashrequirements. The Company evaluateseachcustomer’screditworthinesson a case-by-casebasis.The amountof collateralobtained, ifdeemednecessaryby theCompanyupon extensionof credit,isbasedon management’screditevaluationof the counterparty.Collateralisprimarilyobtainedin theformof commercialand residentialrealestate(including incomeproducingcommercialproperties).

Lettersof creditareconditionalcommitmentsissuedby theCompany to guaranteeto a third-party theperformanceof a customer.Those guaranteesareprimarilyissuedto supportpublicand privateborrowing arrangements,bond financingand similartransactions.The creditriskinvolvedin issuinglettersof creditis essentiallythesameas thatinvolvedin extendingloanfacilitiesto customers.

Commitmentsto makeloansaregenerallymadeforperiodsof 90 days or less.The fixedrateloan commitmentshave interestratesrangingfrom2.48% to 15.00% and maturitiesup to 2042. Variablerateloan commitmentshave interestratesrangingfrom3.00% to 10.00% and maturitiesup to 2048.

Note 16—Fair Value Measurement

Fairvalueistheexchangepricethatwould be receivedforan assetor paidto transfera liability(exit price)in theprincipalor mostadvantageousmarketfortheassetor liabilityin an orderlytransactionbetween marketparticipantson themeasurementdate.In addition,theCompany has theabilityto obtainfairvaluesfor marketsthatarenot accessible.

These typesof inputscreatethefollowingfairvaluehierarchy:

Level 1—Quoted pricesin activemarketsforidenticalassetsor liabilities.

Level 2—Quoted pricesforsimilarinstrumentsin activemarkets,quotedpricesforidenticalor similar instrumentsin marketsthatarenot activeand model-derivedvaluationswhose inputsareobservableor whose significantvaluedriversareobservable.

Level 3—Unobservableinputsthataresupportedby littleor no marketactivityand thataresignificant to thefairvalueof theassetor liability.Unobservableinputsareused to measurefairvalueto theextentthat observableinputsarenot available.The Company’sown dataused to developunobservableinputsmaybe adjustedformarketconsiderationswhen reasonablyavailable.

Thecategorizationwithinthevaluationhierarchyisbasedupon thelowestlevelof inputthatissignificantto thefairvaluemeasurement.The Company’sassessmentof thesignificanceof a particularinputto thefairvaluemeasurementin itsentiretyrequiresjudgment,and considersfactorsspecificto assetsand liabilities.

The Company used thefollowingmethodsand significantassumptionsto estimatefairvalueforcertain assetsmeasuredand carriedatfairvalueon a recurringbasis:

Securitiesavailable-for-sale—The Company obtainsfairvaluemeasurementsfroman independent pricingservice.Managementreviewstheproceduresused by thethirdparty,includingsignificantinputsused in thefairvaluecalculations.The fairvaluemeasurementsconsiderobservabledatathatmayincludedealerquotes, marketspreads,cashflows,theU.S.Treasuryyieldcurve,livetradinglevels,tradeexecutiondata,market consensusprepaymentspeeds,creditinformationand thebond’stermsand conditions,amongotherthings.When marketquotesarenot readilyaccessibleor available,alternativeapproachesareutilized,such as matrixor model pricing.

41

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The Company’s methodology for pricing non-rated bonds focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated municipal bond, the Company references a publicly issued bond by the same issuer if available as well as other additional key metrics to support the credit worthiness. Typically, pricing for these types of bonds would require a higher yield than a similar rated bond from the same issuer. A reduction in price is applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one notch lower (i.e. a “AA” rating for a comparable bond would be reduced to “AA-” for the Company’s valuation). In 2019 and 2018, all of the ratings derived by the Company were “BBB” or better with and without comparable bond proxies. The fair value measurement of municipal bonds is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined, the Company obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets.

Equity and other securities—The Company utilizes the same fair value measurement methodology for equity and other securities as detailed in the securities available-sale portfolio above.

Servicingassets—Fairvalueisbasedon a loan-by-loanbasistakingintoconsiderationtheoriginalterm to maturity,thecurrentage of theloanand theremainingtermto maturity.The valuationmethodologyutilized fortheservicingassetsbeginswith generatingfuturecashflowsforeachservicingasset,basedon theirunique characteristicsand market-basedassumptionsforprepaymentspeeds.The presentvalueof thefuturecashflows arethencalculatedutilizingmarket-baseddiscountrateassumptions.

Derivativeinstruments—Interestratederivatives arevaluedby a thirdparty,usingmodelsthatprimarily use marketobservableinputs,such as yieldcurves,and arevalidatedby comparisonwith valuationsprovidedby therespectivecounterparties.Derivativefinancialinstrumentsareincludedin otherassetsand otherliabilitiesin theConsolidatedStatementsof FinancialCondition.

The followingtablessummarizetheCompany’sfinancialassetsand liabilitiesthatwere measuredatfair valueon a recurringbasisat June 30, 2019 and December 31, 2018:

			Fair Value Measurements Using
June 30, 2019	Fair Value		Level 1		Level 2		Level 3
Financial assets
Securities available-for-sale
U.S. Treasury Notes	$	45,830	$	45,830	$	—	$	—
U.S. Government agencies		177,706		—		177,706		—
Obligations of states, municipalities, and political    subdivisions		89,918		—		89,723		195
Mortgage-backed securities; residential
Agency		352,411		—		352,411		—
Non-Agency		94,490		—		94,490		—
Mortgage-backed securities; commercial
Agency		123,394		—		123,394		—
Non-Agency		31,369		—		31,369		—
Corporate securities		38,899		—		38,899		—
Other securities		15,012		—		15,012		—
Equity and other securities, at fair value
Mutual funds		2,924		2,924		—		—
Equity securities		4,738		—		4,043		695
Servicing assets		19,760		—		—		19,760
Derivative assets		9,168		—		9,168		—
Financial liabilities
Derivative liabilities		9,607		—		9,607		—

42

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

			Fair Value Measurements Using
December 31, 2018	Fair Value		Level 1		Level 2		Level 3
Financial assets
Securities available-for-sale
U.S. Treasury Notes	$	52,667	$	52,667	$	—	$	—
U.S. Government agencies		186,498		—		186,498		—
Obligations of states, municipalities, and political    subdivisions		60,233		—		60,038		195
Mortgage-backed securities; residential
Agency		272,963		—		272,963		—
Non-Agency		83,621		—		83,621		—
Mortgage-backed securities; commercial
Agency		90,434		—		90,434		—
Non-Agency		30,458		—		30,458		—
Corporate securities		34,173		—		34,173		—
Other securities		6,609		2,844		3,074		691
Servicing assets		19,693		—		—		19,693
Derivative assets		10,740		—		10,740		—
Financial liabilities
Derivative liabilities		4,243		—		4,243		—

TheCompany has originated, and acquired through a business combination,servicingassets classified as Level 3 of the fair value hierarchy. The Company acquired single-issuertrustpreferredsecurities includedin othersecuritiescategorizedas Level3 of thefairvaluehierarchy.

TheCompany has purchased, and acquired through a business combination,privately-issuedmunicipalsecuritiesthatare categorizedas Level3. These municipalsecuritiesarebonds issuedformunicipalgovernmententities locatedin theChicago metropolitan area and areprivatelyplaced,non-ratedbonds withoutCommittee on Uniform Security Identification Proceduresnumbers.

The Company did not have any transfersto or fromLevel 3 of thefairvaluehierarchyduringthe six months ended June 30, 2019 and 2018.

43

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The following table presents additional information about financial assets measured at fair value on recurring basis for which the Company used significant unobservable inputs (Level 3):

	Six Months Ended June 30,
	2019		2018		2019			2018
	Investment Securities				Servicing Assets
Balance, beginning of period	$	886	$	1,052	$	19,693		$	21,400
Acquired assets at fair value		—		314		—			—
Additions, net		—		—		2,551			4,148
Amortization		3		3		—			—
Change in unrealized gain		1		11		—			—
Change in fair value		—		—		(2,484	)		(3,961	)
Balance, end of period	$	890	$	1,380	$	19,760		$	21,587

The followingtablepresentsadditionalinformationabouttheunobservableinputsused in thefairvalue measurementson recurringbasisthatwere categorizedwithinLevel3 of thefairvaluehierarchyas of June 30, 2019:

Financial Instruments	Valuation Technique	Unobservable Inputs	Range of Inputs	Weighted Average Range	Impact to Valuation from an Increased or Higher Input Value
Obligations of states,    municipalities, and    political obligations	Discountedcash flow	Probability of default	2.4%	2.4%	Decrease
Single issuer trust preferred	Discounted cash flow	Probability of default	4.9%—5.4%	5.9%	Decrease
Servicing assets	Discounted cash flow	Prepayment speeds	2.8%—20.0%	12.9%	Decrease
		Discount rate	6.4%—23.4%	13.5%	Decrease
		Expected weighted average loan life	0.1—10.0 years	4.7 years	Increase

The Company used thefollowingmethodsand significantassumptionsto estimatefairvalueforcertain assetsmeasuredand carriedatfairvalueon a non-recurringbasis:

Impairedloans (excludingacquired impairedloans)—Impairedloans,otherthanthoseexistingon thedateof a businessacquisition,areprimarilycarriedatthefairvalueof theunderlyingcollateral,less estimatedcoststo sell,iftheloaniscollateraldependent.Valuationsof impairedloansthatarecollateral dependentaresupportedby thirdpartyappraisalsin accordancewith theBank’s creditpolicy. Other valuation methods include analysis of discounted cash flows, which measures the present value of expected future cash flows discounted at the loan’s effective interest rate. Impairedloansthatarenot collateraldependentarenot material.

Assetsheld forsale—Assetsheldforsaleconsistof formerbranchlocations and real estate previouslypurchasedforexpansion.Assetsareconsideredheldforsalewhen managementhas approvedto sell theassetsfollowinga branchclosureor otherevents.The propertiesarebeingactivelymarketedand transferred to assetsheldforsalebasedon thelowerof carryingvalueor itsfairvalue,lessestimatedcoststo sell.

44

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Otherrealestateowned—Certainassetsheldwithinotherrealestateowned representrealestateor othercollateralthathas been adjustedto itsestimatedfairvalue,lesscostto sell,as a resultof transferringfrom theloanportfolioatthetimeof foreclosureor repossessionand basedon management’speriodicimpairment evaluation.Fromtimeto time,non-recurringfairvalueadjustmentsto otherrealestateowned arerecordedto reflectpartialwrite-downsbasedon an observablemarketpriceor currentappraisedvalueof property.

Adjustmentsto fairvaluebasedon such non-recurringtransactionsgenerallyresultfromtheapplication of lower-of-cost-or-marketaccountingor write-downsof individualassetsdue to impairment.The following tablessummarizetheCompany’sassetsthatwere measuredatfairvalueon a non-recurringbasis,excluding acquiredimpairedloans,as of June 30, 2019 and December 31, 2018:

			Fair Value Measurements Using
June 30, 2019	Fair Value		Level 1		Level 2		Level 3
Non-recurring
Impaired loans
(excluding acquired impaired loans)
Commercial real estate	$	15,932	$	—	$	—	$	15,932
Residential real estate		2,877		—		—		2,877
Commercial and industrial		17,789		—		—		17,789
Assets held for sale		16,329		—		—		16,329
Other real estate owned		8,070		—		—		8,070

			Fair Value Measurements Using
December 31, 2018	Fair Value		Level 1		Level 2		Level 3
Non-recurring
Impaired loans
(excluding acquired impaired loans)
Commercial real estate	$	9,792	$	—	$	—	$	9,792
Residential real estate		2,076		—		—		2,076
Commercial and industrial		17,397		—		—		17,397
Assets held for sale		14,489		—		—		14,489
Other real estate owned		5,314		—		—		5,314

The followingmethodsand assumptionswere used by theCompany in estimatingfairvaluesof other assetsand liabilitiesfordisclosurepurposes:

Cash and cash equivalents—For theseshort-terminstruments,thecarryingamountisa reasonable estimateof fairvalue.

Securitiesheld-to-maturity—The Company obtainsfairvaluemeasurementsfroman independent pricingservice.Managementreviewstheproceduresused by thethirdparty,includingsignificantinputsused in thefairvaluecalculations.The fairvaluemeasurementsconsiderobservabledatathatmayincludedealerquotes, marketspreads,cashflows,theU.S.Treasuryyieldcurve,livetradinglevels,tradeexecutiondata,market consensusprepaymentspeeds,creditinformationand thebond’stermsand conditions,amongotherthings.When marketquotesarenot readilyaccessibleor available,alternativeapproachesareutilized,such as matrixor model pricing.

Restrictedstock—The fairvaluehas been determinedto approximatecost.

Loans held forsale—The fairvalueof loansheldforsalearebasedon quotedmarketprices,where available,and determinedby discountedestimatedcashflowsusinginterestratesapproximatingtheCompany’s currentoriginationratesforsimilarloansadjustedto reflecttheinherentcreditrisk.

45

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Loanand leasereceivables,net—For certainvariablerateloansthatrepricefrequentlyand with no significantchangesin creditrisk,fairvalueisestimatedatcarryingvalue.The fairvalueof othertypesof loansis estimated using an exit price notion for 2019 values. It is estimatedby discountingfuturecashflows,usingcurrentratesatwhich similarloanswould be madeto borrowerswith similarcreditratingsand forthesameremainingmaturities.

Deposits—The fairvalueof demanddeposits,savingsaccounts,and certainmoneymarket depositsistheamountpayableon demandatthereportingdate.The fairvalueof fixed-maturitycertificatesof depositisestimatedby discountingfuturecashflows,usingratescurrentlyofferedfordepositsof similar remainingmaturities.

FederalHomeLoanBankadvances—The fairvalueof FHLBadvancesisestimatedby discounting theagreementsbasedon maturitiesusingratescurrentlyofferedforFHLBadvancesof similarremaining maturitiesadjustedforprepaymentpenaltiesthatwould be incurrediftheborrowingswere paidoffon the measurementdate.

Securitiessold under agreementsto repurchase—The carryingamountapproximatesfairvaluedue to  maturitiesof lessthanninetydays.

Junior subordinated debentures—The fairvalueof juniorsubordinateddebentures,in theformof trustpreferredsecurities,isdeterminedusingratescurrentlyavailableto theCompany fordebtwith similarterms and remainingmaturities.

Accrued interestreceivableand payable—The carryingamountapproximatesfairvalue.

Commitmentsto extend creditand lettersof credit—The fairvaluesof theseoff-balancesheetcommitmentsto extendcreditand commercialand lettersof creditarenot consideredpracticableto estimatebecauseof thelackof quotedmarketpricesand theinabilityto estimatefair valuewithoutincurringexcessivecosts.

46

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The estimatedfairvaluesof financialinstrumentsnot carried at fair value and levelswithinthefairvaluehierarchyareas follows:

			June 30,				December 31,
	Fair Value		2019				2018
	Hierarchy Level		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial assets
Cash and due from banks		1	$	57,513	$	57,513	$	30,190	$	30,190
Interest bearing deposits with other banks		2		31,802		31,802		91,670		91,670
Securities held-to-maturity		2		4,421		4,488		99,266		97,739
Other restricted stock		2		22,937		22,937		19,202		19,202
Loans held for sale		3		18,473		20,625		19,827		21,654
Loans and lease receivables, net (less impaired loans    at fair value(1)		3		3,795,418		3,702,441		3,447,160		3,407,652
Accrued interest receivable		3		12,913		12,913		10,863		10,863
Financial liabilities
Non-interest-bearing deposits		2		1,240,375		1,240,375		1,192,873		1,192,873
Interest-bearing deposits		2		2,819,868		2,828,014		2,557,043		2,554,329
Accrued interest payable		2		4,522		4,522		3,484		3,484
Line of credit		2		—		—		—		—
Federal Home Loan Bank advances		2		500,000		500,000		425,000		425,000
Securities sold under repurchase agreement		2		32,885		32,885		34,166		34,166
Junior subordinated debentures		3		37,059		42,310		36,768		42,351

(1) In accordance with the prospective adoption of ASU 2016-01, the fair value of loans and lease receivables, net (less impaired loans at fair value) as of June 30, 2019 was measured using an exit price notion. The fair value as of December 31, 2018 was measured using an entry price notion.

Note 17—Derivative Instruments and Hedge Activities

The Company recognizes derivative financial instruments at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Financial Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. The following tables present the fair value of the Company’s derivative financial instruments and classification on the Consolidated Statements of Financial Condition as of June 30, 2019 and December 31, 2018:

	June 30, 2019						December 31, 2018
			Fair Value						Fair Value
	Notional Amount		Other Assets		Other Liabilities		Notional Amount		Other Assets		Other Liabilities
Derivatives designated as hedging instruments
Interest rate swaps designated as cash     flow hedges	$	250,000	$	1,456	$	1,316	$	250,000	$	6,699	$	—
Derivatives not designated as hedging instruments
Other interest rate derivatives		286,798		7,712		8,280		294,545		4,041		4,237
Other credit derivatives		4,262		—		11		4,424		—		6
Total derivatives	$	541,060	$	9,168	$	9,607	$	548,969	$	10,740	$	4,243

47

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Interest rate swaps designated as cash flow hedges—Cash flow hedges of interest payments associated with certain FHLB advances had notional amounts totaling $250.0 million as of June 30, 2019 and December 31, 2018. The Company assesses the effectiveness of each hedging relationship by comparing the changes in fair value of the derivative hedging instrument with the changes in fair value of the designated hedged transactions.

Interest recorded on these swap transactions reduced FHLB interest expense by $574,000and$374,000 during the three months ended June 30, 2019 and 2018, respectively, and is reported as a component of interest expense on FHLB advances.Interest recorded on these swap transactions reduced FHLB interest expense by $1.3 million and $435,000 during the six months ended June 30, 2019 and 2018, respectively. At June 30, 2019, the Company estimates $767,000 of the unrealized gain to be reclassified as a decrease to interest expense during the next twelve months.

The following table reflects the cash flow hedges as of June 30, 2019:

Notional amounts	$	250,000
Derivative assets fair value		1,456
Derivative liabilities fair value		—
Weighted average pay rates		1.67	%
Weighted average receive rates		2.61	%
Weighted average maturity	2.7 years

The following table reflects the net gains (losses) recorded in accumulated other comprehensive income (loss) and the Consolidated Statements of Operations relating to the cash flow derivative instruments for the six months ended: 

	June 30, 2019							June 30, 2018
	Amount of Loss Recognized in OCI			Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense		Amount of Gain (Loss) Recognized in Other Non-Interest Income		Amount of Gain Recognized in OCI		Amount of Gain Reclassified from OCI to Income as an Increase to Interest Expense		Amount of Gain (Loss) Recognized in Other Non-Interest Income
Interest rate swaps	$	(5,234	)	$	1,280	$	—	$	5,632	$	435	$	—

Other interest rate derivatives—The total combined notional amount was $286.8 million as of June 30, 2019 with maturities ranging from April 2020 to January 2030. The fair values of the interest rate derivative agreements are reflected in other assets and other liabilities with corresponding gains or losses reflected in non-interest income. During the three months ended June 30, 2019 and 2018, there were $392,000 and $946,000 of transaction fees, respectively, included in other non-interest income, related to these derivative instruments. During the six months ended June 30, 2019 and 2018, there were $717,000 and $946,000 of transaction fees, respectively, related to these derivative instruments.

The following table reflects other interest rate derivatives as of June 30, 2019:

Notional amounts	$	286,798
Derivative assets fair value		7,712
Derivative liabilities fair value		8,280
Weighted average pay rates		4.74	%
Weighted average receive rates		4.56	%
Weighted average maturity	7.0 years

48

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Other credit derivatives—The total notional amount was $4.3 millionand $4.4 million as of June 30, 2019 and December 31, 2018, respectively. The fair value of the other credit derivativesare reflected in other liabilities with corresponding gains or losses reflected in non-interest income. The credit valuation adjustment (“CVA”) related to the other credit derivatives resulted in adecrease to other non-interest income during the threemonths ended June 30, 2019 of $3,000, and an increase to other non-interest income during the three months ended June 30, 2018 of$1,000. There wereno transaction fees included in non-interest income related to these derivative instruments during the three months ended June 30, 2019 and 2018. The CVA related to the other credit derivatives resulted in a decrease to other non-interest income during the six months ended June 30, 2019 and 2018 of $4,000 and $2,000, respectively. There were no transaction fees included in non-interest income related to these derivative instruments during the six months ended June 30, 2019, and there were $26,000 of transaction fees during the six months ended June 30, 2018.

The Company has entered into risk participation agreements with counterparty banks to assume a portion of the credit risk related to borrower transactions. The credit risk related to these other credit derivatives is managed through the Company’s loan underwriting process.

Credit risk—Derivative instruments are inherently subject to market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the Company’s risk of loss when the counterparty to a derivative contract fails to perform according to the terms of the agreement. Market and credit risks are managed and monitored as part of the Company’s overall asset-liability management process. The credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company’s loan underwriting process. The Company’s loan underwriting process also approves the Bank’s swap counterparty used to mirror the borrowers’ swap. The Company has a bilateral agreement with each swap counterparty that provides that fluctuations in derivative values are to be fully collateralized with either cash or securities. The CVA is a fair value adjustment to the derivative to account for this risk. During the three months ended June 30, 2019 and 2018, the CVA resulted in a decrease to non-interest income of $221,000 and $65,000, respectively. During the six months ended June 30, 2019 and 2018, the CVA resulted in a decrease to non-interest income of$372,000 and $38,000, respectively.

The Company has agreements with its derivative counterparties that contain a cross-default provision under which if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain derivative counterparties that contain a provision where if the Company fails to maintain its status as a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations resulted in a net asset position.

The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative asset and liabilities on the Consolidated Statements of Financial Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of: 

	June 30, 2019						December 31, 2018
	Derivative Assets Fair Value			Derivative Liabilities Fair Value			Derivative Assets Fair Value			Derivative Liabilities Fair Value
Gross amounts recognized	$	9,168		$	9,607		$	10,740		$	4,243
Less: Amounts offset in the Consolidated Statements of    Financial Condition		—			—			—			—
Net amount presented in the Consolidated Statements of    Financial Condition	$	9,168		$	9,607		$	10,740		$	4,243
Gross amounts not offset in the Consolidated Statements of    Financial Condition
Offsetting derivative positions		(1,478	)		(1,478	)		(2,823	)		(2,823	)
Collateral posted		(7,690	)		(8,129	)		(7,917	)		(1,317	)
Net credit exposure	$	—		$	—		$	—		$	103

For purposes of this disclosure, the amount of posted collateral by the counterparties is limited to the amount offsetting the derivative asset and derivative liability.

49

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 18 – Share-Based Compensation

In June 2017, the Company adopted the 2017 Omnibus Incentive Compensation Plan (the “Omnibus Plan”) in connection with our IPO. The Omnibus Plan provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalent rights and other equity-based, equity-related or cash-based awards. A total of 1,550,000 shares of our common stock have been reserved for issuance under the Omnibus Plan. As of June 30, 2019, there were 1,222,576 shares available for future grants under the Omnibus Plan.

On July 6, 2017, in conjunction with the completion of the IPO, the Company granted 58,900 restricted shares of the Company’s common stock to certain key employees, pursuant to the Omnibus Plan. The restricted shares will cliff vest on the third anniversary of the grant date, subject to continued employment. A total of 11,898 restricted shares were also granted during the year ended December 31, 2017 in connection with the recruitment of employees. These restricted shares vest ratably over a four year period.

During 2018, the Company granted 131,157 shares of restricted common stock, par value $0.01 per share. Of this total, 102,559 restricted shares will vest ratably over four years on each anniversary of the grant date, 15,165 restricted shares will vest ratably over three years on each anniversary of the grant date, and 2,268 restricted shares will vest on the first anniversary of the grant date, all subject to continued employment.

In addition, 11,165 performance-based restricted shares were included in the 2018 grant. The number of shares which may be earned under the award is dependent upon the Company’s return on average assets over a three-year period ending December 31, 2020, measured in 2018 against the Company’s internal targets and for 2019 and 2020 against a peer group consisting of publicly-traded bank holding companies ranging in asset size from 50% to 200% of the Company’s total assets. Under the award, 25% of the shares will be earned at threshold performance, 100% will be earned at target and 50th percentile performance, and up to 125% of the shares with above target and 75th percentile performance. Any earned performance shares will vest on the third anniversary of the grant date.

During 2019, the Company granted 141,207 shares of restricted common stock, par value $0.01 per share. Of this total, 98,574 restricted shares will vest ratably over four years on each anniversary of the grant date, 20,975 restricted shares will vest ratably over three years on each anniversary of the grant date, and 683 restricted shares will vest on the first anniversary of the grant date, all subject to continued employment.

In addition, 20,975 performance-based restricted shares were included in the 2019 grants. The number of shares which may be earned under the award is dependent upon the Company’s return on average assets, weighted equally, over a three-year period ending December 31, 2021, measured against a peer group consisting of publicly-traded bank holding companies. Results will be measured cumulatively at the end of the three years. Any earned shares will vest on the third anniversary of the grant date.

50

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The following table discloses the changes in restricted shares for thesix months ended June 30, 2019:

	Omnibus Plan
	Number of Shares			Weighted Average Grant Date Fair Value
Beginning balance, January 1, 2019		196,480		$	21.66
Granted		141,207			19.09
Vested		(35,889	)		22.07
Forfeited		(13,238	)		20.33
Ending balance outstanding at June 30, 2019		288,560		$	20.41

A total of 35,889 restricted shares vested during the six months ended June 30, 2019. The fair value of restricted shares that vested during the six months ended June 30, 2019 was $673,000. A total of 2,975 restricted shares vested during the year ended December 31, 2018. The fair value of restricted shares that vested during the year ended December 31, 2018 was $62,000.  

The Company recognizes share-based compensation based on the estimated fair value of the restricted stock at the grant date. Share-based compensation expense is included in non-interest expense in the Consolidated Statements of Operations.

The following table summarizes restricted stock compensation expense for the six months ended June 30, 2019 and 2018:

	Six Months Ended June 30,
	2019		2018
Total share-based compensation - restricted stock	$	807	$	326
Income tax benefit		225		91
Unrecognized compensation expense		4,829		3,691
Weighted-average amortization period remaining	3.0 years		3.3 years

The fair value of the unvested restricted stock awards at June 30, 2019 was $4.8 million.

The Company maintained a nonqualified, share-based, stock option plan adopted prior to recapitalization (“MBG Plan”). There were no options granted or exercised under this plan during the year ended December 31, 2017. At the time of the Company’s reincorporation in Delaware, in June 2017, the Board of Directors cancelled the MBG Plan and all the respective outstanding options were cancelled.

In October 2014, the Company adopted the Byline Bancorp, Inc. Equity Incentive Plan (“BYB Plan”). The maximum number of shares available for grants under this plan was 2,476,122 shares. During 2016 and 2015, the Company granted options to purchase 212,400 and 1,634,568 shares, respectively, under this plan. The Company did not grant any stock options during the year ended December 31, 2017. In June 2017, the Board of Directors terminated the BYB Plan and no future grants can be made under this plan. Options to purchase a total of 1,452,072 shares remain outstanding under the BYB Plan at June 30, 2019.

51

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The types of stock options granted under the BYB Plan were Time Options and Performance Options. The exercise price of each option is equal to the fair value of the stock as of the date of grant. These option awards have vesting periods ranging from one to five years and have 10-year contractual terms. Stock volatility was computed as the average of the volatilities of peer group companies.

The vesting of Time Options is conditional based on completion of service. Performance Options have conditional vesting based on either performance targets or market performance. Certain Performance Options’ performance goals will be satisfied (in whole or in part) if the Bank achieves various performance targets such as profitability, asset quality, and conditional based on market performance, as outlined in the BYB Plan. Each of the performance goals identified are measured for achievement (or failure to achieve) independent of each other. In October 2017, the Board of Directors determined that the Performance Option goals were satisfied, in whole, and these Performance Options converted to Time Options. As a result of the previous completion of service, 414,894 performance options vested on October 3, 2017.

The fair values of the stock options were determined using the Black-Scholes-Merton model for Time Options and a Monte Carlo simulation model for Performance Options.

The following table discloses the activity in shares subject to options and the weighted average exercise prices, in actual dollars, for the six months ended June 30, 2019:

	BYB Plan
	Number of Shares			Weighted Average Exercise Price		Intrinsic Value		Weighted Average Remaining Contractual Term (in Years)
Beginning balance, January 1, 2019		1,598,872		$	11.84	$	7,713		6.6
Exercised		(86,000	)		16.25	$	245
Forfeited		(60,800	)		16.25
Ending balance outstanding at    June 30, 2019		1,452,072		$	11.39	$	11,225		6.0
Exercisable at June 30, 2019		1,414,572		$	11.26	$	11,118		6.0

A total of 86,000 stock options were exercised during the six months ended June 30, 2019. During the six months ended June 30, 2019, proceeds from the exercise of stock options were $1.4 million and related tax benefit was $68,000. A total of 148,748 stock options were exercised during the year ended December 31, 2018. During the year ended December 31, 2018, proceeds from the exercise of stock options were $1.7 million and related tax benefit was $449,000. No stock options vested during the six months ended June 30, 2019.

The Company recognizes share-based compensation based on the estimated fair value of the option at the grant date. Forfeitures are estimated based upon industry standards. Share-based compensation expense is included in non-interest expense in the Consolidated Statements of Operations. The following table summarizes stock option compensation expense for the six months ended June 30, 2019 and 2018:

	Six Months Ended June 30,
	2019			2018
Total share-based compensation (benefit) - stock options	$	(133	)	$	450
Income tax benefit (expense)		(37	)		125
Unrecognized compensation expense - stock options		35			271
Weighted-average amortization period remaining	0.7 years			1.3 years

52

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Pursuant to the terms of the Merger Agreement, upon the Effective Time, each outstanding First Evanston Option held by a participant in the First Evanston Bancorp, Inc. Stock Incentive Plan (the “FEB Plan”) ceased to represent a right to acquire shares of First Evanston common stock and was assumed and converted automatically into a fully vested and exercisable adjusted option to purchase shares of Byline common stock (each an “Adjusted Option”). In accordance with the Merger Agreement, the number of shares of Byline common stock to which each such Adjusted Option relates is equal to the product (rounded down to the nearest whole share of Byline common stock) of: (a) the number of shares of First Evanston common stock subject to the First Evanston Option immediately prior to May 31, 2018, multiplied by (ii) 4.725. Each Adjusted Option has an exercise price per share of Byline common stock equal to the quotient (rounded up to the nearest whole cent) of (x) the per share exercise price of such First Evanston Option immediately prior to May 31, 2018, divided by (y) 4.725. The description of the conversion process is based on, and qualified by, the Merger Agreement.

The following table discloses the activity in shares subject to options under the FEB Plan and the weighted average exercise prices, in actual dollars, for the six months ended June 30, 2019:

	FEB Plan
	Number of Shares			Weighted Average Exercise Price		Intrinsic Value		Weighted Average Remaining Contractual Term (in Years)
Beginning balance, January 1, 2019		624,383		$	11.31	$	3,339		5.2
Granted		—
Expired		—
Exercised		(80,710	)		11.24	$	673
Forfeited		—
Ending balance outstanding at    June 30, 2019		543,673		$	11.32	$	4,239		4.8
Exercisable at June 30, 2019		543,673		$	11.32	$	4,239		4.8

A total of 80,710 stock options were exercised during the six months ended June 30, 2019. During the six months ended June 30, 2019, proceeds from the exercise of stock options were $907,000 and related tax benefit was $187,000. A total of 56,404 stock options were exercised during the year ended December 31, 2018. During the year ended December 31, 2018, proceeds from the exercise of stock options were $601,000 and related tax benefit was $168,000.

All shares of restricted performance shares of First Evanston common stock (“restricted stock”) that were previously issued under and held by Participants in the FEB Plan prior to the Merger were converted into the right to receive the per share merger consideration in connection with the Merger and pursuant to the Merger Agreement. Accordingly, no shares of First Evanston restricted stock remain outstanding under the FEB Plan.

On April 30, 2019, the Company completed the acquisition of Oak Park River Forest. On May 15, 2019, the Company made a cash payment of $4.2 million for 35,870 outstanding Oak Park River Forest options to participants who elected to receive a cash payment in lieu of converting the options to the Omnibus plan.

Note 19—Earnings per Share

A reconciliation of the numerators and denominators for earnings per common share computations is presented below. Incremental shares represent outstanding stock options for which the exercise price is less than the average market price of the Company’s common stock during the periods presented. Options to purchase 1,995,745 and 2,364,057 shares of common stock were outstanding as of June 30, 2019 and 2018, respectively. There were 288,560 and 194,455 restricted stock awards outstanding at June 30, 2019 and 2018, respectively.

53

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

The following represent the calculation of basic and diluted earnings per share for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Net income	$	13,211	$	2,768	$	25,808	$	9,536
Less: Dividends on preferred shares		195		198		391		391
Net income available to common stockholders	$	13,016	$	2,570	$	25,417	$	9,145
Weighted-average common stock outstanding:
Weighted-average common stock outstanding    (basic)		37,263,352		31,614,973		36,719,436		30,459,495
Incremental shares		684,654		953,423		725,971		988,825
Weighted-average common stock outstanding (dilutive)		37,948,006		32,568,396		37,445,407		31,448,320
Basic earnings per common share	$	0.35	$	0.08	$	0.69	$	0.30
Diluted earnings per common share	$	0.34	$	0.08	$	0.68	$	0.29

Note 20—Stockholders’ Equity

A summary of the Company’s preferred and common stock at June 30, 2019 and December 31, 2018 is as follows:

	June 30,		December 31,
	2019		2018
Series B 7.5% fixed to floating non-cumulative    perpetual preferred stock
Par value	$	0.01	$	0.01
Shares authorized		50,000		50,000
Shares issued		10,438		10,438
Shares outstanding		10,438		10,438
Common stock, voting
Par value	$	0.01	$	0.01
Shares authorized		150,000,000		150,000,000
Shares issued		38,115,219		36,343,239
Shares outstanding		38,115,219		36,343,239

During 2016, the Company authorized and issued Series B 7.50% fixed-to-floating non-voting, noncumulative perpetual preferred stock with a liquidation preference of $1,000 per share, plus the amount of unpaid dividends, if any, which is redeemable at the Company’s option on or after March 31, 2022. Holders of Series B Preferred Stock do not have any rights to convert such stock into shares of any other class of capital stock of the Company. Holders of Series B Preferred Stock are entitled to receive a fixed dividend of 7.50% per annum from the original issue date through December 30, 2021, after which the dividend is paid at a floating rate of three-month LIBOR plus 5.41% per annum.

The Company Series B Preferred Stock is included in Tier 1 capital for regulatory capital purposes and is redeemable at the option of the Company at a redemption price of $1,000 per share, plus any declared and unpaid dividends (i) in whole or part on any dividend payment date on or after March 31, 2022, and (ii) in whole but not in part prior to March 31, 2022, within 90 days following a regulatory event, as defined in the Certificate of Designations of the Company Series B Preferred Stock. The Company must receive approval of the Federal Reserve Board prior to any redemption of the Company Series B Preferred Stock.

For the three months ended June 30, 2019, the Company declared and paid dividends on the Series B preferred stock of $195,000, compared to $198,000 for the three months ended June 30, 2018. For the six months ended June 30, 2019 and 2018, the Company declared and paid dividends on the Series B preferred stock of $391,000.

54

BYLINE BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Table dollars in thousands, except share and per share data) (Unaudited)

Note 21—Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in accumulated other comprehensive income (loss) for the six months ended June 30, 2019 and 2018:

(dollars in thousands)	Unrealized Gains (Losses) on Cash Flow Hedges			UnrealizedGains (Losses) on Available-for -Sale Securities			Total Accumulated Other Comprehensive Income (Loss)
Balance, January 1, 2018	$	2,913		$	(8,000	)	$	(5,087	)
Reclassification of certain income tax effects from    accumulated other comprehensive income		687			(1,450	)		(763	)
Other comprehensive income (loss), net of tax		3,750			(8,235	)		(4,485	)
Balance, June 30, 2018	$	7,350		$	(17,685	)	$	(10,335	)
Balance, January 1, 2019	$	4,763		$	(14,261	)	$	(9,498	)
Adoption of ASU 2016-01		—			(1,440	)		(1,440	)
Other comprehensive income (loss), net of tax		(4,699	)		14,289			9,590
Balance, June 30, 2019	$	64		$	(1,412	)	$	(1,348	)

55

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

The following is a discussion and analysis of Byline Bancorp, Inc.’s financial condition and results of operations and should be read in conjunction with our Unaudited Interim Condensed Consolidated Financial Statements and notes thereto included elsewhere in this report. The words “the Company,” “we,” “Byline,” “our” and “us” refer to Byline Bancorp, Inc. and its consolidated subsidiaries, unless we indicate otherwise.

Overview

Our business

We are a bank holding company headquartered in Chicago, Illinois and conduct all our business activities through our subsidiary, Byline Bank, a full service commercial bank, and Byline Bank’s subsidiaries. Through Byline Bank, we offer a broad range of banking products and services to small and medium sized businesses, commercial real estate and financial sponsors and to consumers who generally live or work near our branches. In addition to our traditional commercial banking business, we provide small ticket equipment leasing solutions through Byline Financial Group, a wholly-owned subsidiary of Byline Bank, headquartered in Bannockburn, Illinois with sales offices in Illinois and New York, and sales representatives in Illinois, Michigan, New Jersey, and New York. Following our acquisition of Ridgestone Financial Services, Inc. (“Ridgestone”) in October 2016, we also participate in U.S. government guaranteed lending programs and originate U.S. government guaranteed loans. Byline Bank was the fifth most active originator of SBA loans in the country and the most active SBA lender in Illinois and Wisconsin, as reported by the SBA for the quarter ended June 30, 2019. Following our acquisition of First Evanston Bancorp, Inc. (“First Evanston”) and its subsidiary bank, First Bank & Trust, at the end of May 2018, we also provide trust and wealth management services to our customers. As of June 30, 2019, we had consolidated total assets of $5.4 billion, total gross loans and leases outstanding of $3.9 billion, total deposits of $4.1 billion, and total stockholders’ equity of $717.7 million.

Ridgestone Acquisition

On October 14, 2016, we completed the acquisition of Ridgestone Financial Services, Inc. under the terms of a definitive merger agreement. As of the acquisition date, Ridgestone had $447.4 million in assets, including $347.3 million of loans, $14.7 million of loans held for sale, $27.2 million of securities, $21.5 million of servicing assets and total deposits of $358.7 million. Ridgestone’s loan portfolio was primarily comprised of the retained unguaranteed portion of U.S. government guaranteed loans as a participant in the SBA and USDA (together, “U.S. government guaranteed”) lending programs. 

First Evanston Acquisition

On May 31, 2018, we completed the acquisition of First Evanston Bancorp, Inc. under the terms of a definitive merger agreement. As a result of the merger, First Evanston’s wholly owned bank subsidiary, First Bank & Trust, was merged with and into Byline Bank. As of the acquisition date, First Evanston had $1.1 billion in assets, including $932.4 million of loans, $128.1 million of securities, and total deposits of $1.0 billion.

At the effective time of the merger (the “Effective Time”), each share of First Evanston’s common stock (the “First Evanston Common Stock”) was converted into the right to receive: (1) 3.994 shares of Byline’s common stock, and (2) an amount in cash equal to $27.0 million divided by the number of outstanding shares of First Evanston Common Stock as of the closing date, with cash paid in lieu of any fractional shares. Options to acquire First Evanston Common Stock that were outstanding at the Effective Time were converted into options of substantially equivalent value to acquire Byline common stock. In the aggregate, Byline paid $27.0 million in cash and issued 6,682,850 shares of its common stock in respect of the outstanding shares of First Evanston Common Stock. The value of the total merger consideration at closing was approximately $179.1 million.

Oak Park River Forest Acquisition

On April 30, 2019, we completed the acquisition of Oak Park River Forest Bankshares, Inc. (“Oak Park River Forest”), the parent company of Community Bank of Oak Park River Forest, under the terms of a definitive merger agreement. As a result of the merger, we acquired Oak Park River Forest through the merger of Oak Park River Forest with and into us, followed immediately by the merger of Community Bank of Oak Park River Forest with and into Byline Bank. As of the acquisition date, Oak Park River Forest had $329.8 million in assets, including $30.5 million of securities, $274.7 million of loans, and $290.2 million of deposits.

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At the effective time of the merger, each share of Oak Park River Forest’s common stock was converted into the right to receive: (1) 7.9321 shares of Byline’s common stock, and (2) an amount in cash equal to $6.2 million divided by the number of outstanding shares of Oak Park River Forest common stock as of the closing date, with cash paid in lieu of fractional shares. Options to acquire Oak Park River Forest common stock that were outstanding at the Effective Time were paid in cash based on elections made by option holders, resulting in an aggregate stock options transaction value of $4.2 million. In the aggregate, Byline paid $6.2 million in cash and issued 1,464,558 shares of its common stock in respect of the outstanding shares of Oak Park River Forest common stock. The value of the total merger consideration at closing was approximately $35.5 million before issuance costs of $429,000.

Strategic Branch Consolidation

We continually perform strategic reviews of our existing banking footprint. With technology improvements and changes to customers’ banking preferences, we examine branch growth potential, customer usage, branch profitability, services provided, markets served and proximity to other locations with a goal of minimizing customer impact and deposit runoff. Since our recapitalization, which occurred in June 2013, our branch network has been reduced from 88 to 61, including eight branches added through the First Evanston acquisition and three branches added through the Oak Park River Forest acquisition. During 2018 and the first half of 2019, we consolidated seven branches and two other facilities within our current network that had a minimal impact on our customer service levels, convenience, and business development capabilities. We will continue to strategically evaluate our locations based on our growth and profitability standards.

We plan to continue to leverage our seasoned management team, the attractive market opportunity in the Chicago metropolitan area, our diversified lending approach and our track record of successfully integrating acquisitions to drive future growth. We believe that having a deep understanding of customers, longstanding ties to the communities in which we operate, a strong market position and exceptional employees allows us to provide the attention, responsiveness and customized service our clients seek while offering a diverse range of products to serve a variety of needs.

Critical Accounting Policies and Significant Estimates

Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to general practices within the Banking industry. To prepare financial statements and interim financial statements in conformity with GAAP, management makes estimates, assumptions and judgments based on available information. These estimates, assumptions and judgments affect the amounts reported in the financial statements and accompanying notes; and are based on information available as of the date of the financial statements. As this information changes, actual results could differ from the estimates, assumptions and judgments reflected in the financial statements. In particular, management has identified several accounting policies that, due to the estimates, assumptions and judgements inherent in those policies, are critical in understanding our financial statements.

These critical accounting policies and estimates include (i) acquisition‑related fair value computations, (ii) the carrying value of loans and leases, (iii) determining the provision and allowance for loan and lease losses, (iv) the valuation of intangible assets such as goodwill, servicing assets and core deposit intangibles, (v) the determination of fair value for financial instruments, including other-than-temporary-impairment losses, (vi) the valuation of real estate held for sale, and (vii) the valuation of or recognition of deferred tax assets and liabilities.

The Jumpstart Our Business Startups Act of 2012, or the JOBS Act, permits us an extended transition period for complying with new or revised accounting standards affecting public companies. We have elected to take advantage of this extended transition period, which means that the financial statements included in this report, as well as any financial statements that we file in the future, will not be subject to all new or revised accounting standards generally applicable to public companies for the transition period for so long as we remain an emerging growth company or until we affirmatively and irrevocably opt out of the extended transition period provided for under the JOBS Act.

The following is a discussion of the critical accounting policies and significant estimates that require us to make complex and subjective judgments. Additional information about these policies can be found in Note 1 of our audited Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2018, that we filed with the Securities and Exchange Commission (“SEC”) on March 15, 2019.

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Business Combinations

We account for business combinations under the acquisition method of accounting in accordance with ASC 805. We recognize the fair value of the assets acquired and liabilities assumed as of the date of acquisition, with any excess of the fair value of consideration provided over the fair value of the identifiable net tangible and intangible assets acquired recorded as goodwill. Transaction costs are expensed as incurred. Application of the acquisition method requires extensive use of accounting estimates and judgements to determine the fair values of the identifiable assets acquired and liabilities assumed at the acquisition date.

In accordance with ASC 805, the acquiring company retains the right to make appropriate adjustments to the assets and liabilities of the acquired entity for information obtained during the measurement period about facts and circumstances that existed as of the acquisition date. The measurement period ends as of the earlier of (i) one year from the acquisition date or (ii) the date when the acquirer receives the information necessary to complete the business combination accounting.

Carrying Value of Loans and Leases

Our accounting methods for loans and leases differ depending on whether they are new or acquired loans and leases; and for acquired loans, whether the loans were acquired at a discount as a result of credit deterioration since the date of origination.

Originated Loans and Leases

We account for originated loans and leases and purchased loans and leases not acquired through business combinations as originated loans and leases. The new loans that management has the intent and ability to hold for the foreseeable future are reported at their outstanding principal balances net of any allowance for loan and lease losses, unamortized deferred fees and costs and unamortized premiums or discounts. The net amount of nonrefundable loan origination fees and certain direct costs associated with the lending process are deferred and amortized to interest income over the contractual lives of the new loans using methods which approximate the level yield method. Discounts and premiums are amortized or accreted to interest income over the estimated term of the new loans using methods that approximate the effective yield method. Interest income on new loans is accrued based on the unpaid principal balance outstanding. Additionally, once an acquired non-impaired loan reaches its contractual maturity date, it is re-underwritten, and if renewed, it is classified as an originated loan.

Acquired Loans and Leases

Acquired loans and leases are recorded at fair value as of the acquisition date. 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. Acquired loans are evaluated upon acquisition and classified as either acquired impaired or acquired non‑impaired. Acquired impaired loans reflect evidence of credit deterioration since origination for which it is probable that all contractually required principal and interest will not be collected by us. Subsequent to acquisition, we periodically update for changes in cash flow expectations, which is reflected in interest income over the life of the loan as accretable yield. Any subsequent decreases in expected cash flow attributable to credit deterioration are recognized by recording a provision for loan losses.

For acquired non‑impaired loans and leases, the excess or deficit of the loan and lease principal balance over the fair value is recorded as a discount or premium at acquisition and is accreted through interest income over the life of the loan or lease. Subsequent to acquisition, these loans and leases are evaluated for credit deterioration and a provision for loan and lease losses would be recorded when probable loss is incurred. These loans and leases are evaluated for impairment consistent with originated loans and leases.

Provision and Allowance for Loan and Lease Losses

The provision for loan and lease losses reflects the amount required to maintain the allowance for loan and lease losses (“ALLL”) at an appropriate level based upon management’s evaluation of the adequacy of general and specific loss reserves.

The ALLL is maintained at a level that management believes is appropriate to provide for known and inherent incurred loan and lease losses as of the dates of the Consolidated Statements of Financial Condition, and we have established methodologies for the determination of its adequacy. The methodologies are set forth in a formal policy and take into consideration the need for an overall general valuation allowance as well as specific allowances that are determined on an individual loan basis. We increase our ALLL by charging provisions for probable losses against our income and decreased by charge‑offs, net of recoveries.

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The evaluation is inherently subjective, as it requires estimates that are susceptible to significant revision as more information becomes available. While management uses available information to recognize losses on loans and leases, changes in economic or other conditions may necessitate revision of the estimate in future periods.

The ALLL is maintained at a level management believes is sufficient to provide for probable losses based upon an ongoing review of the originated and acquired non‑impaired loan and lease portfolios by portfolio category, which include consideration of actual loss experience, peer loss experience, changes in the size and risk profile of the portfolio, identification of individual problem loan and lease situations which may affect a borrower’s ability to repay, and evaluation of prevailing economic conditions.

For acquired impaired loans, a specific valuation allowance is established when it is probable that we will be unable to collect all of the cash flows expected at acquisition, plus the additional cash flows expected to be collected arising from changes in estimates after acquisition.

The originated and non‑impaired acquired loans have limited delinquency and credit loss history and have not yet exhibited an observable loss trend. The credit quality of loans in these loan portfolios are impacted by delinquency status and debt service coverage generated by the borrowers’ businesses and fluctuations in the value of real estate collateral.

Acquired non‑impaired loans and originated loans are considered impaired when, based on current information and events, it is probable that we will be unable to collect the scheduled payments of principal or interest when due, according to the contractual terms of the loan agreements. All acquired non‑impaired loans and originated loans of $100,000 or greater with an internal risk rating of substandard or below and on nonaccrual, as well as loans classified as troubled debt restructurings (“TDR”), are reviewed individually for impairment on a quarterly basis.

Goodwill and Other Intangible Assets

Goodwill

Goodwill represents the excess of the purchase consideration over the fair value of net assets acquired in connection with our recapitalization and acquisitions using the acquisition method of accounting. Goodwill is not amortized but is periodically evaluated for impairment under the provisions of ASC Topic 350, Intangibles—Goodwill and Other (“ASC 350”).

Impairment testing is performed using either a qualitative or quantitative approach at the reporting unit level. Our goodwill is allocated to Byline Bank, which is our only applicable reporting unit for the purposes of testing goodwill for impairment. We have selected November 30 as the date to perform the annual goodwill impairment test. Additionally, we perform a goodwill impairment evaluation on an interim basis when events or circumstances indicate impairment potentially exists.

Servicing Assets

Servicing assets are recognized separately when they are acquired through sales of loans or when the rights to service loans are purchased. When loans are sold with servicing rights retained, servicing assets are recorded at fair value in accordance with ASC Topic 860, Transfers and Servicing (“ASC 860”). Fair value is based on market prices for comparable servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The fair value of servicing rights is highly sensitive to changes in underlying assumptions. Changes in the prepayment speed and discount rate assumptions have the most significant impact on the fair value of servicing rights. See Note 7 and Note 16 of our Unaudited Interim Condensed Consolidated Financial Statements as of June 30, 2019, included in this report, for additional information.

Core Deposit Intangible Assets

Other intangible assets primarily consist of core deposit intangible assets. In valuing core deposit intangibles, we consider variables such as deposit servicing costs, attrition rates and market discount rates. Core deposit intangibles are reviewed annually, or more frequently when events or changes in circumstances occur that indicate that their carrying values may not be recoverable. If the recoverable amount of the core deposit intangibles is determined to be less than its carrying value, we would then measure the amount of impairment based on an estimate of the fair value at that time. We also evaluate whether the events or circumstances have occurred that warrant a revision to the remaining useful lives of intangible assets. In cases where a revision is deemed appropriate, the remaining carrying amounts of the intangible assets are amortized over the revised remaining useful life. Core deposit intangibles are currently amortized over an approximate ten year period.

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Customer Relationship Intangible

Other intangible assets also include our customer relationship intangible asset. In valuing our customer relationship intangibles, we consider variables such as assets under management, attrition rates, and fee structure. Customer relationship intangibles are currently amortized over a 12 year period.

Fair value of Financial Instruments

ASC Topic 820, Fair Value Measurement defines fair value as the price that would be received to sell a financial asset or paid to transfer a financial liability in an orderly transaction between market participants at the measurement date.

The degree of management judgment involved in determining the fair value of assets and liabilities is dependent upon the availability of quoted market prices or observable market parameters. For financial instruments that trade actively and have quoted market prices or observable market parameters, there is minimal subjectivity involved in measuring fair value. When observable market prices and parameters are not available, management judgment is necessary to estimate fair value. In addition, changes in market conditions may reduce the availability of quoted prices or observable data. For example, reduced liquidity in the capital markets or changes in secondary market activities could result in observable market inputs becoming unavailable. Therefore, when market data is not available, we would use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement.

See Note 18 of Byline’s Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2018, for a complete discussion of our use of fair value of financial assets and liabilities and their related measurement practices.

Valuation of Real Estate Held for Sale

Other Real Estate Owned (OREO)

OREO includes real estate assets that have been acquired through, or in lieu of, loan foreclosure or repossession and are to be sold. OREO assets are initially recorded at fair value, less estimated costs to sell, of the collateral of the loan, on the date of foreclosure or repossession, establishing a new cost basis. Adjustments that reduce loan balances to fair value at the time of foreclosure or repossession are recognized as charge‑offs in the allowance for loan and lease losses. Positive adjustments, if any, at the time of foreclosure or repossession are recognized in non‑interest expense. After foreclosure or repossession, management periodically obtains new valuations and real estate or other assets may be adjusted to a lower carrying amount, determined by the fair value of the asset, less estimated costs to sell. Any subsequent write‑downs are recorded as a decrease in the asset and charged against other real estate owned valuation adjustments, included within non-interest expense. Operating expenses of such properties, net of related income, are included in non‑interest expense, and gains and losses on their disposition are included in non‑interest expense. Gains on internally financed other real estate owned sales are accounted for in accordance with the methods stated in ASC Topic 360‑20, Real Estate Sales (“ASC 360‑20”). Any losses on the sales of other real estate owned properties are recognized immediately.

Assets Held for Sale

Assets held for sale consist of former branch locations and real estate purchased for expansion. Assets are considered held for sale when management has approved a plan to sell the assets following a branch closure or other events. The properties are being actively marketed and transferred to assets held for sale based at the lower of its carrying value or its fair value, less estimated costs to sell. Adjustments to reduce the asset balances to fair value are recorded at the time of transfer and are recognized through a charge against income. An assessment of the recoverability of other long-lived assets associated with all branches is periodically performed, resulting in impairment losses which are reflected in other non-interest expense.

Income Taxes

We use the asset and liability method to account for income taxes. The objective of the asset and liability method is to establish deferred tax assets and liabilities for the temporary differences between the financial reporting basis and the income tax basis of our assets and liabilities at enacted tax rates expected to be in effect when such amounts are realized or settled. Our annual tax rate is based on our income, statutory tax rates and available tax planning opportunities. Tax laws are complex and subject to different interpretations by the taxpayer and respective governmental taxing authorities. Significant judgment is required in determining tax expense and in evaluating tax positions, including evaluating uncertainties.

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Deferred income tax assets represent amounts available to reduce income taxes payable on taxable income in future years. Such assets arise because of temporary differences between the financial reporting and tax bases of assets and liabilities, as well as from net operating loss carryforwards. We review our deferred tax positions quarterly for changes which may impact realizability. We evaluate the recoverability of these future tax deductions by assessing the adequacy of future expected taxable income from all sources, including reversal of taxable temporary differences, forecasted operating earnings and available tax planning strategies. We use short and long‑range business forecasts to provide additional information for its evaluation of the recoverability of deferred tax assets. It is our policy to recognize interest and penalties associated with uncertain tax positions, if applicable, as components of non‑interest expense.

A deferred tax valuation allowance is established to reduce the net carrying amount of deferred tax assets if it is determined to be more likely than not that all or some of the deferred tax asset will not be realized. See Note 11 of the notes to our Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2018, for further information on income taxes.

Recently Issued Accounting Pronouncements

Refer to Note 2 of our Unaudited Interim Condensed Consolidated Financial Statements as of June 30, 2019, included in this report, for a description of recent accounting pronouncements, including the effective dates of adoption and anticipated effects on our results of operations and financial condition.

Primary Factors Used to Evaluate Our Business

As a financial institution, we manage and evaluate various aspects of both our results of operations and our financial condition. We evaluate the levels and trends of the line items included in our consolidated balance sheet and income statement as well as various financial ratios that are commonly used in our industry. We analyze these ratios and financial trends against our own historical performance, our budgeted performance and the final condition and performance of comparable financial institutions in our region. Comparison of our financial performance against other financial institutions is impacted by the accounting for acquired non‑impaired and acquired impaired loans.

These factors and metrics described in this prospectus may not provide an appropriate basis to compare our results or financial condition to the results or financial condition of other financial services companies, given our limited operating history and strategic acquisitions since our recapitalization.

Results of Operations

Overview

Our results of operations depend substantially on net interest income, which is the difference between interest income on interest-earning assets, consisting primarily of interest income on loans and lease receivables, including accretion income on loans, investment securities and other short-term investments, and interest expense on interest-bearing liabilities, consisting primarily of deposits and borrowings. Our results of operations are also dependent upon our generation of non-interest income, consisting primarily of income from fees and service charges on deposits, loan servicing revenue, wealth management and trust income, ATM and interchange fees, and net gains on sales of investment securities and loans. Other factors contributing to our results of operations include our provisions for loan and lease losses, provision for income taxes, and non-interest expenses, such as salaries and employee benefits, occupancy and equipment expenses and other miscellaneous operating costs.

Our second quarter 2019 results reflect growth in net interest income, primarily driven by the Oak Park River Forest acquisition, the First Evanston acquisition, and organic loan and lease growth. We successfully completed our acquisition of Oak Park River Forest on April 30, 2019, which we believe provides a strong core deposit base. Net interest margin increased to 4.51% for the second quarter of 2019, compared to 4.43% for the second quarter of 2018. The increase was primarily due to increased interest income due to an increase in earning assets as a result of the acquisitions, organic loan and lease growth, and increased loan accretion income. This was partially offset by increased interest expense due to the acquisitions and increased rates paid on time deposits. Our total revenues increased by $15.4 million, or 28.8%, compared to the second quarter of 2018, primarily driven by the acquired First Evanston and Oak Park River Forest loan portfolios, loan and lease originations, and increased loan and lease yields.

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Selected Financial Data

	As of or For the Three Months Ended June 30,						As of or For the Six Months Ended June 30,
(dollars in thousands, except share and per share data)	2019			2018			2019			2018
Summary of Operations
Net interest income	$	54,448		$	39,056		$	104,533		$	72,751
Provision for loan and lease losses		6,391			3,956			10,390			9,071
Non-interest income		14,183			14,211			26,171			25,334
Non-interest expense		43,954			45,479			84,633			77,093
Income before provision for income taxes		18,286			3,832			35,681			11,921
Provision for income taxes		5,075			1,064			9,873			2,385
Net income		13,211			2,768			25,808			9,536
Dividends on preferred shares		195			198			391			391
Income available to common stockholders	$	13,016		$	2,570		$	25,417		$	9,145
Earnings per Common Share
Basic earnings per common share	$	0.35		$	0.08		$	0.69		$	0.30
Diluted earnings per common share	$	0.34		$	0.08		$	0.68		$	0.29
Adjusted diluted earnings per share(2)(3)	$	0.41		$	0.32		$	0.79		$	0.52
Weighted-average common shares outstanding (basic)		37,263,352			31,614,973			36,719,436			30,459,495
Weighted-average common shares outstanding (diluted)		37,948,006			32,568,396			37,445,407			31,448,320
Common shares outstanding		38,115,219			36,218,955			38,115,219			36,218,955
Key Ratios and Performance Metrics (annualized where applicable)
Net interest margin		4.51	%		4.43	%		4.47	%		4.44	%
Cost of deposits		0.92	%		0.52	%		0.90	%		0.47	%
Efficiency ratio(1)		61.19	%		83.26	%		61.90	%		76.66	%
Adjusted efficiency ratio(1)(2)(3)(5)		56.02	%		63.28	%		57.70	%		65.69	%
Non-interest expense to average assets		3.34	%		4.72	%		3.33	%		4.30	%
Adjusted non-interest expense to average assets(2)(3)		3.07	%		3.62	%		3.12	%		3.70	%
Return on average stockholders' equity		7.60	%		2.14	%		7.67	%		3.93	%
Adjusted return on average stockholders' equity(2)(3)(5)		9.16	%		8.18	%		8.90	%		6.89	%
Return on average assets		1.00	%		0.29	%		1.02	%		0.53	%
Adjusted return on average assets(2)(3)(5)		1.21	%		1.10	%		1.18	%		0.93	%
Non-interest income to total revenues(2)		20.67	%		26.68	%		20.02	%		25.83	%
Pre-tax pre-provision return on average assets(2)		1.88	%		0.81	%		1.81	%		1.17	%
Adjusted Pre-tax pre-provision return on average assets(2)		2.15	%		1.91	%		2.03	%		1.77	%
Return on average tangible common stockholders' equity(2)		11.32	%		3.34	%		11.35	%		5.40	%
Adjusted return on average tangible common stockholders' equity(2)(3)(5)		13.44	%		11.05	%		13.00	%		9.09	%
Non-interest-bearing deposits to total deposits		30.55	%		32.73	%		30.55	%		32.73	%
Loans and leases held for sale and loans and leases held for investment to    total deposits		95.60	%		92.03	%		95.60	%		92.03	%
Deposits to total liabilities		86.88	%		87.01	%		86.88	%		87.01	%
Deposits per branch	$	66,561		$	61,778		$	66,561		$	61,778
Tangible book value per common share(2)	$	13.79		$	12.18		$	13.79		$	12.18
Asset Quality Ratios
Non-performing loans and leases to total loans and leases held for    investment, net before ALLL		0.95	%		0.81	%		0.95	%		0.81	%
ALLL to total loans and leases held for investment, net before ALLL		0.81	%		0.59	%		0.81	%		0.59	%
Net charge-offs to average total loans and leases held for investment, net    before ALLL		0.25	%		0.29	%		0.25	%		0.50	%
Acquisition accounting adjustments(4)	$	37,109		$	52,090		$	37,109		$	52,090
Capital Ratios
Common equity to total assets		13.12	%		12.61	%		13.12	%		12.61	%
Tangible common equity to tangible assets(2)		10.09	%		9.51	%		10.09	%		9.51	%
Leverage ratio		11.09	%		10.57	%		11.09	%		10.57	%
Common equity tier 1 capital ratio		11.65	%		10.88	%		11.65	%		10.88	%
Tier 1 capital ratio		12.96	%		12.36	%		12.96	%		12.36	%
Total capital ratio		13.71	%		12.92	%		13.71	%		12.92	%

(1) Represents non-interest expense less amortization of intangible assets divided by net interest income and non-interest income.

(2) Represents a non-GAAP financial measure. See “Reconciliations of non-GAAP Financial Measures” for a reconciliation of our non-GAAP measures to the most directly comparable GAAP financial measure.

(3) Calculation excludes impairment charges, merger-related expenses, and core system conversion expenses.

(4) Represents the remaining unamortized premium or unaccreted discount as a result of applying the fair value acquisition accounting adjustment at the time of the business combination on acquired loans.  

(5) Calculation excludes incremental income tax expense or benefit related to changes in corporate income tax rates.

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We reported consolidated net income of $13.2million for the three months ended June 30, 2019, compared to net income of $2.8 million for thethree months ended June 30, 2018, an increase of $10.4 million. The increase in net income was primarily attributable to a$15.4 million increase in net interest income and a $1.5 million decrease in non-interest expense, offset by a $4.0 million increase in provision for income taxes, a $2.4 million increase in provision for loan and lease losses, and a $28,000decrease in non-interest income.The increase in net interest income during the three months ended June 30, 2019 was a primarily a result ofthe acquisitions andorganic loan and lease growth, slightly offset by increases in interest-bearing deposits costduring the current period.The decrease in non-interest expense was primarily due toa decrease in data processing of $6.5 million due to expenses incurred related to the core system conversion, partially offset by an increase in salaries and employee benefits of $4.4 milliondue to organizational growth as a result of the acquisitions.The increase in provision for income taxes was primarily driven by an increase in net income during the period. The increase in provision for loan and lease losses was primarily driven additional specific impairments on the unguaranteed balance of the U.S. government guaranteed loan portfolio and increases in the general reserves driven by loan and lease originations.The decrease in non-interest income was primarily driven by a decrease in net gains on sale of loans.

Net income available to common stockholders was $13.0 million or $0.35 per basic and $0.34 per diluted common share for the three months ended June 30, 2019, compared to $2.6 million or $0.08 per basic and diluted common share for the three months ended June 30, 2018. Dividends on preferred shares were $195,000 for the three months ended June 30, 2019 compared to $198,000 for the three months ended June 30, 2018.

Our annualized return on average assets was 1.00% for the three months ended June 30, 2019, compared to 0.29% for the three months ended June 30, 2018. Our annualized return on average stockholders’ equity was 7.60% for the three months ended June 30, 2019, compared to 2.14% for the three months ended June 30, 2018. Our efficiency ratio was 61.19% for the three months ended June 30, 2019, compared to 83.26% for the three months ended June 30, 2018.

We reported consolidated net income of $25.8 million for the six months ended June 30, 2019, compared to net income of $9.5 million for the six months ended June 30, 2018, an increase of $16.3 million. The increase in net income was primarily attributable to a $31.8 million increase in net interest income and an $837,000 increase in non-interest income, offset by a $7.5 million increase in non-interest expense, a $7.5 million increase in provision for income taxes, and a $1.3 million increase in provision for loan and lease losses. The increase in net interest income during the six months ended June 30, 2019 was primarily a result of the acquisitions and organic loan and lease growth. The increase in non-interest income was primarily driven by the acquisitions and a decreased downward loan servicing asset revaluation, partially offset by a decrease in net gains on sales of loans. The increase in non-interest expense was primarily due to additional costs associated with the acquisitions, primarily salaries and employee benefits, partially offset by a decrease in data processing of $5.7 million due to the core system conversion. The increase in provision for income taxes was primarily driven by an increase in net income during the period. The increase in provision for loan and lease losses was primarily driven by increases in the general reserves driven by loan and lease originations.

Net income available to common stockholders was $25.4 million or $0.69 per basic and $0.68 per diluted common share for the six months ended June 30, 2019, compared to $9.1 million or $0.30 per basic and $0.29 per diluted common share for the six months ended June 30, 2018. Dividends on preferred shares were $391,000 for the six months ended June 30, 2019 and 2018.

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Our annualized return on average assets was 1.02% for the six months ended June 30, 2019, compared to 0.53% for the six months ended June 30, 2018. Our annualized return on average stockholders’ equity was7.67% for the six months ended June 30, 2019, compared to 3.93% for the six months ended June 30, 2018. Our efficiency ratio was 61.90% for the six months ended June 30, 2019, compared to 76.66% for the six months ended June 30, 2018.

Net Interest Income

Net interest income, representing interest income less interest expense, is a significant contributor to our revenues and earnings. We generate interest income from interest and dividends on interest-earning assets, which include loans, leases and investment securities we own. We incur interest expense from interest paid on interest-bearing liabilities, which include interest-bearing deposits, FHLB advances, junior subordinated debentures and other borrowings. To evaluate net interest income, we measure and monitor (i) yields on our loans and other interest-earning assets, (ii) the costs of our deposits and other funding sources, (iii) our net interest spread, and (iv) our net interest margin. Net interest spread is the difference between rates earned on interest-earning assets and rates paid on interest-bearing liabilities. Net interest margin is calculated as the annualized net interest income divided by average interest-earning assets. Because non-interest-bearing sources of funds, such as non-interest-bearing deposits and stockholders’ equity, also fund interest-earning assets, net interest margin includes the benefit of these non-interest-bearing sources.

We also recognize income from the accretable discounts associated with the purchase of interest-earning assets. Because of our recapitalization and the acquisitions of Ridgestone, First Evanston, and Oak Park River Forest, we derive a portion of our interest income from the accretable discounts on acquired loans. The accretion is generally recognized over the life of the loan and is impacted by changes in expected cash flows on the loan. This accretion will continue to have an impact on our net interest income as long as loans acquired with a discount at acquisition represent a meaningful portion of our interest-earning assets. As of June 30, 2019, acquired loans with evidence of credit deterioration accounted for under ASC Topic 310-30, Accounting for Purchased Loans with Deteriorated Credit Quality, represented 7.6% of our total loan portfolio, compared to 8.0% at December 31, 2018.

Changes in the market interest rates we earn on interest-earning assets or pay on interest-bearing liabilities, as well as the volume and types of interest-earning assets, interest-bearing and non-interest-bearing liabilities, are usually the largest drivers of periodic changes in net interest spread, net interest margin and net interest income. In addition, our interest income includes the accretion of the discounts on our acquired loans, which will also affect our net interest spread, net interest margin and net interest income.

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The following tables present, for the periods indicated, information about (i) average balances, the total dollar amount of interest income from interest-earning assets and the resultant average yields; (ii) average balances, the total dollar amount of interest expense on interest-bearing liabilities and the resultant average rates; (iii) net interest income; (iv) the interest rate spread; and (v) the net interest margin. Yields have been calculated on a pre-tax basis (dollars in thousands). 

	Three Months Ended June 30,
	2019								2018
	Average Balance(5)			Interest Inc / Exp		Average Yield / Rate			Average Balance(5)			Interest Inc / Exp		Average Yield / Rate
ASSETS
Cash and cash equivalents	$	35,346		$	245		2.78	%	$	68,019		$	199		1.17	%
Loans and leases(1)		3,759,634			59,524		6.35	%		2,638,757			39,627		6.02	%
Taxable securities		975,693			6,563		2.70	%		790,568			4,786		2.43	%
Tax-exempt securities(2)		68,314			428		2.52	%		36,749			229		2.50	%
Total interest-earning assets	$	4,838,987		$	66,760		5.53	%	$	3,534,093		$	44,841		5.09	%
Allowance for loan and lease losses		(28,203	)							(18,292	)
All other assets		464,036								347,383
TOTAL ASSETS	$	5,274,820							$	3,863,184
LIABILITIES AND STOCKHOLDERS’    EQUITY
Deposits
Interest checking	$	333,725		$	452		0.54	%	$	227,760		$	124		0.22	%
Money market accounts		695,986			1,790		1.03	%		469,066			781		0.67	%
Savings		477,775			118		0.10	%		454,295			83		0.07	%
Time deposits		1,278,488			6,946		2.18	%		864,348			2,757		1.28	%
Total interest-bearing deposits		2,785,974			9,306		1.34	%		2,015,469			3,745		0.75	%
Federal Home Loan Bank advances		426,446			2,174		2.04	%		342,825			1,360		1.59	%
Other borrowed funds		73,358			832		4.55	%		57,644			680		4.73	%
Total borrowings		499,804			3,006		2.41	%		400,469			2,040		2.04	%
Total interest-bearing liabilities	$	3,285,778		$	12,312		1.50	%	$	2,415,938		$	5,785		0.96	%
Non-interest-bearing demand deposits		1,254,173								891,175
Other liabilities		37,941								37,524
Total stockholders’ equity		696,928								518,547
TOTAL LIABILITIES AND STOCKHOLDERS’    EQUITY	$	5,274,820							$	3,863,184
Net interest spread(3)							4.03	%							4.13	%
Net interest income				$	54,448							$	39,056
Net interest margin(4)							4.51	%							4.43	%
Net loan accretion impact on margin				$	4,868		0.40	%				$	3,604		0.41	%

(1) Loan and lease balances are net of deferred origination fees and costs and initial direct costs. Non-accrual loans and leases are included in total loan and lease balances.

(2) Interest income and rates exclude the effects of a tax equivalent adjustment to adjust tax-exempt investment income on tax-exempt investment securities to a fully taxable basis due to immateriality.

(3) Represents the average rate earned on interest-earning assets minus the average rate paid on interest-bearing liabilities.

(4) Represents net interest income (annualized) divided by total average interest-earning assets.

(5) Average balances are average daily balances.  

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	Six Months Ended June 30,
	2019								2018
	Average Balance(5)			Interest Inc / Exp		Average Yield / Rate			Average Balance(5)			Interest Inc / Exp		Average Yield / Rate
ASSETS
Cash and cash equivalents	$	50,969		$	546		2.16	%	$	53,337		$	281		1.06	%
Loans and leases(1)		3,647,427			113,907		6.30	%		2,458,019			73,281		6.01	%
Taxable securities		951,048			12,646		2.68	%		760,806			9,018		2.39	%
Tax-exempt securities(2)		61,792			771		2.52	%		32,140			403		2.53	%
Total interest-earning assets	$	4,711,236		$	127,870		5.47	%	$	3,304,302		$	82,983		5.06	%
Allowance for loan and lease losses		(26,786	)							(17,828	)
All other assets		435,672								327,357
TOTAL ASSETS	$	5,120,122							$	3,613,831
LIABILITIES AND STOCKHOLDERS’    EQUITY
Deposits
Interest checking	$	313,499		$	866		0.56	%	$	207,337		$	162		0.16	%
Money market accounts		654,723			3,249		1.00	%		407,647			1,152		0.57	%
Savings		474,509			257		0.11	%		445,663			159		0.07	%
Time deposits		1,237,182			13,010		2.12	%		799,410			4,770		1.20	%
Total interest-bearing deposits		2,679,913			17,382		1.31	%		1,860,057			6,243		0.68	%
Federal Home Loan Bank advances		429,890			4,273		2.00	%		353,125			2,718		1.55	%
Other borrowed funds		72,325			1,682		4.69	%		57,061			1,271		4.49	%
Total borrowings		502,215			5,955		2.39	%		410,186			3,989		1.96	%
Total interest-bearing liabilities	$	3,182,128		$	23,337		1.48	%	$	2,270,243		$	10,232		0.91	%
Non-interest-bearing demand deposits		1,220,266								817,908
Other liabilities		39,582								36,476
Total stockholders’ equity		678,146								489,204
TOTAL LIABILITIES AND STOCKHOLDERS’    EQUITY	$	5,120,122							$	3,613,831
Net interest spread(3)							3.99	%							4.15	%
Net interest income				$	104,533							$	72,751
Net interest margin(4)							4.47	%							4.44	%
Net loan accretion impact on margin				$	10,069		0.43	%				$	5,941		0.36	%

(1) Loan and lease balances are net of deferred origination fees and costs and initial direct costs. Non-accrual loans and leases are included in total loan and lease balances.

(2) Interest income and rates exclude the effects of a tax equivalent adjustment to adjust tax-exempt investment income on tax-exempt investment securities to a fully taxable basis due to immateriality.

(3) Represents the average rate earned on interest-earning assets minus the average rate paid on interest-bearing liabilities.

(4) Represents net interest income (annualized) divided by total average interest-earning assets.

(5) Average balances are average daily balances.

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Increases and decreases in interest income and interest expense result from changes in average balances (volume) of interest-earning assets and interest-bearing liabilities, as well as changes in average interest rates. The following table sets forth the effects of changing rates and volumes on our net interest income during the periods shown. Information is provided with respect to (i) effects on interest income attributable to changes in volume (changes in volume multiplied by prior rate) and (ii) effects on interest income attributable to changes in rate (changes in rate multiplied by prior volume). Changes applicable to both volume and rate have been allocated to volume. Yields have been calculated on a pre-tax basis. The table below is a summary of increases and decreases in interest income and interest expense resulting from changes in average balances (volume) and changes in average interest rates (dollars in thousands):

	Three Months Ended June 30, 2019 compared to Three Months Ended June 30, 2018
	Increase (Decrease) Due to
	Volume			Rate			Total
Interest income
Cash and cash equivalents	$	(227	)	$	273		$	46
Loans and leases(1)		17,726			2,171			19,897
Taxable securities		1,245			532			1,777
Tax-exempt securities		197			2			199
Total interest income	$	18,941		$	2,978		$	21,919
Interest expense
Deposits
Interest checking	$	146		$	182		$	328
Money market accounts		588			421			1,009
Savings		1			34			35
Time deposits		2,250			1,939			4,189
Total interest-bearing deposits		2,985			2,576			5,561
Federal Home Loan Bank advances		429			385			814
Other borrowed funds		178			(26	)		152
Total borrowings		607			359			966
Total interest expense	$	3,592		$	2,935		$	6,527
Net interest income	$	15,349		$	43		$	15,392

(1) Includes loans and leases on non-accrual status.

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Net interest income for the three months ended June 30, 2019 was $54.4 million compared to $39.1 million during the same period in 2018, an increase of $15.4 million or39.4%. Interest income increased$21.9 millionfor the three months ended June 30, 2019 compared to the same period in 2018, and was primarily a result of an increase in loans as a result of the acquisitions, organic loan and lease growth, an increase in average yield on loans and leases, and an increase in the securities portfolio. Interest expense increased by $6.5 million for the three months ended June 30, 2019 compared to the same period in 2018, primarily due to deposits assumed as a result of the acquisitions, increased interest expense on interest-bearing deposits and FHLB advances resulting from higher market interest rates, and an increase in FHLB advances to fund organic growth.

	Six Months Ended June 30, 2019 compared to Six Months Ended June 30, 2018
	Increase (Decrease) Due to
	Volume			Rate			Total
Interest income
Cash and cash equivalents	$	(25	)	$	290		$	265
Loans and leases(1)		37,091			3,535			40,626
Taxable securities		2,534			1,094			3,628
Tax-exempt securities		370			(2	)		368
Total interest income	$	39,970		$	4,917		$	44,887
Interest expense
Deposits
Interest checking	$	293		$	411		$	704
Money market accounts		1,228			869			2,097
Savings		10			88			98
Time deposits		4,593			3,647			8,240
Total interest-bearing deposits		6,124			5,015			11,139
Federal Home Loan Bank advances		767			788			1,555
Other borrowed funds		354			57			411
Total borrowings		1,121			845			1,966
Total interest expense	$	7,245		$	5,860		$	13,105
Net interest income	$	32,725		$	(943	)	$	31,782

(1) Includes loans and leases on non-accrual status.

Net interest income for the six months ended June 30, 2019 was $104.5 million compared to $72.8 million during the same period in 2018, an increase of $31.8 million or 43.7%. The increase in interest income of $44.9 million was primarily a result of an increase in loans as a result of the acquisitions, organic loan and lease growth, an increase in average yield on loans and leases, and an increase in the securities portfolio. Interest expense increased by $13.1 million for the six months ended June 30, 2019 compared to the same period in 2018, primarily due to deposits assumed as a result of the acquisitions, increased interest expense on interest-bearing deposits and FHLB advances resulting from higher market interest rates, and increased FHLB advances to fund organic growth.

The net interest margin for the three months ended June 30, 2019 was 4.51%, an increase of eight basis points compared to 4.43% for the three months ended June 30, 2018. The net interest margin for the six months ended June 30, 2019 was 4.47%, an increase of three basis points compared to 4.44% for the six months ended June 30, 2018. The primary driver of the increases for the three and six month periods was increases in average loan and lease yields and loan accretion income resulting from the acquisitions and rising interest rates on variable rate loans, partially offset by increased average interest-bearing deposit yields resulting from rising interest rates. Net loan accretion income was $4.9 million for the three months ended June 30, 2019, compared to $3.6 million for the three months ended June 30, 2018. Net loan accretion income was $10.1 million for the six months ended June 30, 2019, compared to $5.9 million for the six months ended June 30, 2018. Total net loan accretion on acquired loans contributed 40 basis points to the net interest margin for the three months ended June 30, 2019, compared to 41 basis points for the three months ended June 30, 2018. Total net loan accretion on acquired loans contributed 43 basis points to the net interest margin for the six months ended June 30, 2019, compared to 36 basis points for the six months ended June 30, 2018.

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Provision for Loan and Lease Losses

The provision for loan and lease losses represents a charge to earnings necessary to establish an allowance for loan and lease losses that, in management’s evaluation, is appropriate to provide coverage for probable losses incurred in the loan and lease portfolio. The allowance for loan and lease losses is increased by the provision for loan and lease losses and is decreased by charge-offs, net of recoveries on prior charge-offs.

Provisions for loan and lease losses were $6.4 million and $4.0 million for the three months ended June 30, 2019 and 2018, respectively, an increase of $2.4 million or 61.6%. Provisions for loan and lease losses were $10.4 million and $9.1 million for the six months ended June 30, 2019 and 2018, respectively, an increase of $1.3 million or 14.5%. These increases were mainly due to an increase to the general reserve driven by growth in the originated loan and lease portfolio and additional specific impairments on the unguaranteed balance of the U.S. government guaranteed portfolio. The ALLL as a percentage of loans and leases increased from 0.72% at December 31, 2018 to 0.81% at June 30, 2019.

Non-Interest Income

Non-interest income was $14.2 million for the three months ended June 30, 2019 and 2018. A decrease in net gains on sales of U.S. government guaranteed loans due to decreased sales volume during the quarter was largely offset by a reduction in loan servicing asset revaluation due to changes in fair value of the servicing asset as a result of changes to valuation assumptions, net gain on security sales during the quarter, and wealth management and trust income as a result of the First Evanston acquisition.

Non-interest income was $26.2 million for the six months ended June 30, 2019, compared to $25.3 million for the six months ended June 30, 2018, an increase of $837,000 or 3.3%. The increase was primarily due to a reduction in loan servicing asset revaluation due to changes in fair value of the servicing asset as a result of changes to valuation assumptions, security sales during the quarter, and wealth management and trust income as a result of the First Evanston acquisition. These increases were partially offset by a decrease in net gains on sales of U.S. government guaranteed loans due to decreased sales volume during the period.

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2019			2018			2019			2018
Fees and service charges on deposits	$	1,441		$	1,456		$	3,211		$	2,768
Loan servicing revenue		2,630			2,533			5,169			4,983
Loan servicing asset revaluation		(1,223	)		(2,074	)		(2,484	)		(3,961	)
ATM and interchange fees		945			850			1,662			1,763
Net gain on sales of securities available-for-sale		973			4			973			4
Change in fair value of equity securities, net		551			—			1,050			—
Net gains on sales of loans		7,472			9,723			13,705			17,199
Wealth management and trust income		626			192			1,221			192
Other non-interest income		768			1,527			1,664			2,386
Total non-interest income	$	14,183		$	14,211		$	26,171		$	25,334

Fees and service charges on deposits represent amounts charged to customers for banking services, such as fees on deposit accounts, and include, but are not limited to, maintenance fees, insufficient fund fees, overdraft protection fees, wire transfer fees and other charges. Fees and service charges on deposits were $1.4 million for the three months ended June 30, 2019, compared to $1.5 million for the three months ended June 30, 2018, a decrease of $15,000 or 1.0%. The variance was primarily attributable to lower fee income from business and consumer accounts. Fees and service charges on deposits were $3.2 million for the six months ended June 30, 2019, compared to $2.8 million for the six months ended June 30, 2018, an increase of $443,000 or 16.0%. The increase was primarily driven by additional deposit accounts from the acquisitions.

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While portions of the loans that we originate are sold and generate gains on sale revenue, servicing rights for the majority of loans that we sell are retained by us. In exchange for continuing to service loans that have been sold, we receive servicing revenue from a portion of the interest cash flow of the loan. We generated $2.6 million in loanservicing revenue on the sold portion of the U.S. government guaranteed loans for thethree months ended June 30, 2019,compared to $2.5 millionfor thethree months ended June 30, 2018, an increaseof$97,000 or 3.8%. We generated $5.2 million in loan servicing revenue for the six months ended June 30, 2019, compared to $5.0 millionfor the six months ended June 30, 2018, an increase of $186,000 or 3.7%. The increaseswere primarily driven by an increase in total guaranteed loans serviced due to additional U.S government guaranteed loans sold with retained servicing rights during the periods. At June 30, 2019 and December 31, 2018, the outstanding balances of guaranteed loans serviced were $1.3 billion.

Loan servicing asset revaluation represents net changes in the fair value of our servicing assets. Loan servicing asset revaluation had a downward adjustment of $1.2 million for the three months ended June 30, 2019, compared to $2.1 million for the three months ended June 30, 2018, a decrease of $851,000 or 41.0%. Loan servicing asset revaluation had a downward adjustment of $2.5 million for the six months ended June 30, 2019, compared to $4.0 million for the six months ended June 30, 2018, a decrease of $1.5 million or 37.3%. The reductions in loan servicing revaluation were primarily driven by the change in fair value of the servicing asset as a result of changes to valuation assumptions, including decreased prepayment speeds and discount rates.

ATM and interchange fees were $945,000 for the three months ended June 30, 2019, compared to $850,000 for the three months ended June 30, 2018, an increase of $95,000 or 11.2%. The increase was primarily driven by increased transactional account volume and higher interchange income. ATM and interchange fees were $1.7 million for the six months ended June 30, 2019, compared to $1.8 million for the six months ended June 30, 2018, a decrease of $101,000 or 5.7%. The decrease was primarily driven by lower interchange income.

Net gains on sales of securities were $973,000 during the three and six months ended June 30, 2019. Net gains on sales of securities were $4,000 for the three and six months ended June 30, 2018. The increase is a result of additional sales during the periods.

Change in fair value of equity securities, net, was $551,000 and $1.1 million for the three and six months ended June 30, 2019, respectively. Upon adoption of new accounting guidance as of January 1, 2019, changes in fair value of equity securities are recorded through net income rather than other comprehensive income. The income recorded during the periods is a result of an increase in the fair value of these securities.

Net gains on sales of loans were $7.5 million for the three months ended June 30, 2019, compared to $9.7 million for the three months ended June 30, 2018, a decrease of $2.3 million or 23.2%. We sold $75.2 million of U.S. government guaranteed loans during the three months ended June 30, 2019 compared to $95.0 million during the three months ended June 30, 2018. Net gains on sales of loans were $13.7 million for the six months ended June 30, 2019, compared to $17.2 million for the six months ended June 30, 2018, a decrease of $3.5 million or 20.3%. We sold $141.4 million of U.S. government guaranteed loans during the six months ended June 30, 2019, compared to $173.6 million during the six months ended June 30, 2018. The decreases in net gains on sales were primarily driven by reduced government guaranteed loan sales volume during the periods.

Wealth management and trust income represents fees charged to customers for investment, trust, or wealth management services and are primarily determined by total assets under management. Wealth management and trust income was $626,000 for the three months ended June 30, 2019, compared to $192,000 for the three months ended June 30, 2018. Wealth management and trust income was $1.2 million for the six months ended June 30, 2019, compared to $192,000 for the six months ended June 30, 2018. Prior to the First Evanston acquisition during the second quarter of 2018, we did not record wealth management and trust income. Assets under management were $591.1 million and $610.9 million as of June 30, 2019 and 2018, respectively.

Other non-interest income was $768,000 for the three months ended June 30, 2019, compared to $1.5 million for the three months ended June 30, 2018, a decrease of $759,000 or 49.7%. The primary drivers of the decrease were a decrease in customer derivative products fee income of $773,000 due to the interest rate environment and a decrease in gains on sales of assets held for sale of $84,000.

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Othernon-interest income was $1.7 million for the six months ended June 30, 2019, compared to $2.4 million for the six months ended June 30, 2018, a decrease of $722,000 or 30.3%.The primary drivers of the decrease were a decrease in customer derivative products fee income of $654,000 due to the interest rate environment, and loss on sales of assets held for sale of $98,000for the six months ended June 30, 2019, compared to a gain of $162,000for the six months ended June 30, 2018.

Non-Interest Expense

Non-interest expense was $44.0 million for the three months ended June 30, 2019, compared to $45.5 million for the three months ended June 30, 2018, a decrease of $1.5 million or 3.4%. The decrease was primarily due to contract termination costs associated with our core system conversion incurred during the second quarter of 2018. Non-interest expense was $84.6 million for the six months ended June 30, 2019, compared to $77.1 million for the six months ended June 30, 2018, an increase of $7.5 million or 9.8%. The increase was primarily due to the additional expenses as a result of our acquisition related activity, including salary and employee benefits, other intangible asset amortization expense, and core system conversion completed in the first quarter of 2019.

The following table presents the major components of our non-interest expense for the periods indicated (dollars in thousands):

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2019		2018		2019		2018
Salaries and employee benefits	$	23,652	$	19,244	$	46,544	$	37,522
Occupancy expense, net		4,337		4,499		8,617		8,254
Equipment expense		732		558		1,401		1,161
Loan and lease related expenses		1,841		1,471		3,418		2,871
Legal, audit and other professional fees		2,981		4,418		5,047		6,269
Data processing		3,849		10,371		6,993		12,672
Net loss recognized on other real estate owned and    other related expenses		252		472		448		471
Regulatory assessments		371		366		312		607
Other intangible assets amortization expense		1,959		1,130		3,732		1,897
Advertising and promotions		732		347		1,441		596
Telecommunications		537		466		1,001		884
Other non-interest expense		2,711		2,137		5,679		3,889
Total non-interest expense	$	43,954	$	45,479	$	84,633	$	77,093

Salaries and employee benefits, the single largest component of our non-interest expense, totaled $23.7 million for the three months ended June 30, 2019, compared to $19.2 million for the three months ended June 30, 2018, an increase of $4.4 million or 22.9%. Salaries and employee benefits totaled $46.5 million for the six months ended June 30, 2019, compared to $37.5 million for the six months ended June 30, 2018, an increase of $9.0 million or 24.0%. The increases were primarily a result of the acquisitions. Our staffing increased from 950 full-time equivalent employees as of June 30, 2018 to 1,003 as of June 30, 2019.  

Occupancy expense was $4.3 million for the three months ended June 30, 2019, compared to $4.5 million for the three months ended June 30, 2018, a decrease of $162,000 or 3.6%. The decrease was primarily a result of branch consolidations. Occupancy expense was $8.6 million for the six months ended June 30, 2019, compared to $8.3 million for the six months ended June 30, 2018, an increase of $363,000 or 4.4%. The increase was primarily a result of our larger branch network and seasonal weather fluctuations in the Chicagoland area, offset by the consolidation of seven branches and two other facilities.

Equipment expense was $732,000 for the three months ended June 30, 2019, compared to $558,000 for the three months ended June 30, 2018, an increase of $174,000 or 31.2%. Equipment expense was $1.4 million for the six months ended June 30, 2019, compared to $1.2 million for the six months ended June 30, 2018, an increase of $240,000 or 20.7%. The increases were primarily a result of increased depreciation expense related to increased investment in equipment and technology assets.

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Loan and lease related expenses were $1.8 millionfor the three months ended June 30, 2019, compared to $1.5million for thethree months ended June 30, 2018, an increase of $370,000 or25.2%. Loan and lease related expenses were $3.4 million for the six months ended June 30, 2019, compared to $2.9 million for the six months ended June 30, 2018, an increase of $547,000 or 19.1%. The increaseswereprimarily driven byadditional loans and leases from organic growth.

Legal, audit and other professional fees were $3.0 million for the three months ended June 30, 2019, compared to $4.4 million for the three months ended June 30, 2018, a decrease of $1.4 million or 32.5%. The decrease was primarily driven by higher legal and professional services incurred related to the First Evanston acquisition during the second quarter of 2018. Legal, audit and other professional fees were $5.0 million for the six months ended June 30, 2019, compared to $6.3 million for the six months ended June 30, 2018, a decrease of $1.2 million or 19.5%. The decrease was primarily driven by legal and advisory fees associated with the First Evanston acquisition, partially offset by fees associated with our core system conversion.

Data processing expense was $3.8 million for the three months ended June 30, 2019, compared to $10.4 million for the three months ended June 30, 2018, a decrease of $6.5 million or 62.9%. The decrease was primarily due to a contract termination expense and increased expenses in connection with our core system conversion during the second quarter of 2018. Data processing expense was $7.0 million for the six months ended June 30, 2019, compared to $12.7 million for the six months ended June 30, 2018, a decrease of $5.7 million or 44.8%. The decrease was primarily due to contract termination expenses during the second quarter of 2018 related to the completed core system conversion.

Net loss recognized on other real estate owned and other related expenses was $252,000 for the three months ended June 30, 2019, compared to $472,000 for the three months ended June 30, 2018, a decrease of $220,000, or 46.6%. This variance was primarily attributed to decreased losses on sales of other real estate owned assets during the period, partially offset by increased expenses due to higher real estate tax expenses resulting from refund income recognized in the prior period. Net loss recognized on other real estate owned and other related expenses was $448,000 for the six months ended June 30, 2019, compared to $471,000 for the six months ended June 30, 2018, a decrease of $23,000, or 4.9%. This variance was primarily attributed to decreased losses on sales of other real estate owned assets, decreased rental income, and decreased expenses due to lower inventory during the period.

Regulatory assessments were $371,000 for the three months ended June 30, 2019, compared to $366,000 for the three months ended June 30, 2018, an increase of $5,000 or 1.4%. The increase was primarily driven by our increased asset size. Regulatory assessments were $312,000 for the six months ended June 30, 2019, compared to $607,000 for the six months ended June 30, 2018, a decrease of $295,000 or 48.6%. The decrease was primarily driven by an FDIC credit applied during the first quarter of 2019.

Other intangible assets amortization expense was $2.0 million for the three months ended June 30, 2019, compared to $1.1 million for the three months ended June 30, 2018, an increase of $829,000 or 73.4%. Other intangible assets amortization expense was $3.7 million for the six months ended June 30, 2019, compared to $1.9 million for the six months ended June 30, 2018, an increase of $1.8 million or 96.7%. The increases were attributed to additional core deposit intangible asset amortization resulting from the acquisitions and a customer relationship intangible asset amortization as a result of the First Evanston acquisition.

Advertising and promotions were $732,000 for the three months ended June 30, 2019, compared to $347,000 for the three months ended June 30, 2018, an increase of $385,000 or 111.0%. Advertising and promotions were $1.4 million for the six months ended June 30, 2019, compared to $596,000 for the six months ended June 30, 2018, an increase of $845,000 or 141.8%. The increases were primarily due to an increase in advertising attributable to deposit advertising campaigns and an increase in sponsorships.

Telecommunications expense was $537,000 for the three months ended June 30, 2019, compared to $466,000 for the three months ended June 30, 2018, an increase of $71,000 or 15.2%. Telecommunications expense was $1.0 million for the six months ended June 30, 2019, compared to $884,000 for the six months ended June 30, 2018, an increase of $117,000 or 13.2%. The increases were primarily a result of our larger branch network and integration expenses partially offset by cost savings initiatives.

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Other non-interest expense was$2.7 million for the three months ended June 30, 2019, compared to$2.1 million for thethree months ended June 30, 2018, an increase of $574,000or26.9%.The primary drivers of the increase were increases of $404,000 in ATM, debit card, and other losses, and $212,000 in provision for unfunded commitments due to an increase in our unfunded loan and lease commitments, partially offset by a decrease of $117,000 in impairment charges on assets held for sale.

Other non-interest expense was $5.7 million for the six months ended June 30, 2019, compared to $3.9 million for the six months ended June 30, 2018, an increase of $1.8 million or 46.0%. The primary drivers of the increase were increases of $713,000 in stationery, supplies and postage, $605,000 in ATM, debit card, and other losses, and $275,000 in impairment charges on assets held for sale.

Our efficiency ratio was 61.19% for the three months ended June 30, 2019, compared to 83.26% for the three months ended June 30, 2018. The improvement in our efficiency ratio for the three months ended June 30, 2019 is primarily attributable to the increase in our net interest income resulting from our acquisitions and organic loan and lease growth. Our efficiency ratio was 61.90% for the six months ended June 30, 2019, compared to 76.66% for the six months ended June 30, 2018. The improvement in our efficiency ratio for the six months ended June 30, 2019 is primarily attributable to the increase in our net interest income resulting from our acquisitions and organic loan and lease growth, partially offset by increased non-interest expense primarily driven by increased salary and employee benefit expenses and core system conversion expenses. Our adjusted efficiency ratio was 56.02% for the three months ended June 30, 2019, compared to 63.28% for the three months ended June 30, 2018. Our adjusted efficiency ratio was 57.70% for the six months ended June 30, 2019, compared to 65.69% for the six months ended June 30, 2018. Please refer to the “Reconciliation of Non-GAAP Financial Measures” for a reconciliation of our non-GAAP measures to the most directly comparable GAAP financial measure.

Income Taxes

Our provision for income taxes for the three months ended June 30, 2019 totaled $5.1 million, compared to $1.1 million for the three months ended June 30, 2018. The increase in income tax expense was primarily due to increased income before provision for income taxes during the period. Our effective tax rate was 27.8% for the three months ended June 30, 2019 and 2018. The Company recorded discrete income tax benefit related to the exercise of stock options and vesting of restricted stock of $17,000 and $3,000 for the three months ended June 30, 2019 and 2018, respectively.

Our provision for income taxes for the six months ended June 30, 2019 totaled $9.9 million, compared to $2.4 million for the six months ended June 30, 2018. The increase in income tax expense was primarily due to increased income before provision for income taxes during the period. Our effective tax rate was 27.7% and 20.0% for the six months ended June 30, 2019 and 2018, respectively. We expect our effective tax rate for 2019 to be approximately 27% to 29%. The Company recorded discrete income tax benefit related to the exercise of stock options and vesting of restricted stock of $65,000 and $211,000 for the six months ended June 30, 2019 and 2018, respectively.

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017, and ASC Topic 740, Income Taxes (“ASC 740”), required us to reflect the changes associated with the Tax Act’s provisions in the fourth quarter of 2017. The Tax Act is complex and has extensive implications for the Company’s federal and state taxes. Among other things, the Tax Act reduced the corporate federal income tax rate from 35% to 21%, effective January 1, 2018. Also on December 22, 2017, the SEC issued Staff Accounting Bulletin No. 118, which provides guidance on accounting for the Tax Act’s impact. SAB 118 provides a measurement period, not to extend beyond one year from the date of enactment. As a result of the rate change, the Company’s net deferred tax assets were required to be revalued during the period in which the new legislation was enacted. The Company recorded net income tax expense of $7.2 million during the fourth quarter of 2017 as a result of this change, and recorded an additional discrete income tax benefit of $760,000 during the first quarter of 2018.

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Financial Condition

Balance Sheet Analysis

Our total assets increased by $448.7 million, or 9.1%, to $5.4 billion at June 30, 2019, compared to $4.9 billion at December 31, 2018. The increase in total assets includes an increase of $361.5 million, or 10.3%, in loans and leases from $3.5 billion at December 31, 2018 to $3.9 billion at June 30, 2019. Our originated loan and lease portfolio increased by $346.5 million and our acquired loan and lease portfolio increased by $15.0 million. The increase in our originated portfolio is primarily attributed to organic loan and lease growth and renewals of acquired non-impaired loans that are now reflected with originated loans. The increase in our acquired portfolio is attributed to the Oak Park River Forest acquisition, partially offset by renewals reflected in originated loans.  

Total liabilities increased by $381.7 million, or 8.9%, to $4.7 billion at June 30, 2019, compared to $4.3 billion at December 31, 2018. The increase is a result of an increase in total deposits of $310.3 million, or 8.3%, primarily attributed to the Oak Park River Forest acquisition, time deposit growth as a result of deposit promotions to seek to expand our retail customer base, and money market growth.

Investment Portfolio

Our investment securities portfolio consists of securities classified as available-for-sale and held-to-maturity. There were no securities classified as trading in our investment portfolio as of June 30, 2019 or December 31, 2018. All available-for sale securities are carried at fair value and may be used for liquidity purposes should management consider it to be in our best interest. Securities available-for-sale consist primarily of residential mortgage-backed securities, commercial mortgage- backed securities and U.S. government agencies securities.

Securities available-for-sale increased $151.4 million, or 18.5%, from $817.7 million at December 31, 2018 to $969.0 million at June 30, 2019. The increase was primarily attributed to the adoption of the provisions of ASU No. 2017-12 during the year. Upon adoption, we elected to reclassify $94.8 million of securities held-to-maturity to securities available-for-sale. Additionally, we acquired $30.3 million of available-for-sale securities upon the acquisition of Oak Park River Forest, and there were additional purchases of agency, mortgage-backed, corporate, and U.S. Treasury securities during the year.

At June 30, 2019, our held-to-maturity securities portfolio consists of obligations of states, municipalities and political subdivisions. We carry these securities at amortized cost. Securities held-to-maturity decreased $94.8 million, or 95.5%, from $99.3 million at December 31, 2018 to $4.4 million at June 30, 2019. This decrease was due to the adoption of ASU No. 2017-12 as discussed above and principal paydowns received during the year.

The fair value of our equity and other securities portfolio was $7.7 million at June 30, 2019. The Company adopted the provisions of ASU No 2016-01 on January 1, 2019, which require changes in the value of certain equity securities and mutual fund investments to be recognized in the Consolidated Statements of Operations. These securities were included with the available-for-sale portfolio as of December 31, 2018.

We had no securities that were classified as having other-than-temporary-impairment (“OTTI”) as of June 30, 2019 or December 31, 2018.

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The following table summarizes the fair value of the available-for-sale and held-to-maturity securities portfolio as of the dates presented (dollars in thousands):

	June 30, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale
U.S. Treasury Notes	$	45,348	$	45,830	$	52,775	$	52,667
U.S. Government agencies		176,425		177,706		187,427		186,498
Obligations of states, municipalities, and political    subdivisions		88,240		89,918		60,686		60,233
Residential mortgage-backed securities
Agency		354,480		352,411		284,038		272,963
Non-agency		94,471		94,490		84,998		83,621
Commercial mortgage-backed securities
Agency		123,639		123,394		93,543		90,434
Non-agency		31,302		31,369		31,458		30,458
Corporate securities		38,717		38,899		34,716		34,173
Other securities		15,012		15,012		4,613		6,609
Total	$	967,634	$	969,029	$	834,254	$	817,656

	June 30, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	4,421	$	4,488	$	23,835	$	23,665
Residential mortgage-backed securities
Agency		—		—		40,082		39,644
Non-agency		—		—		35,349		34,430
Total	$	4,421	$	4,488	$	99,266	$	97,739

Certain securities have fair values less than amortized cost and, therefore, contain unrealized losses. At June 30, 2019, we evaluated the securities which had an unrealized loss for OTTI and determined all declines in value to be temporary. There were 83 investment securities with unrealized losses at June 30, 2019. We anticipate full recovery of amortized cost with respect to these securities by maturity, or sooner in the event of a more favorable market interest rate environment. We do not intend to sell these securities and it is not more likely than not that we will be required to sell them before recovery of their amortized cost basis, which may be at maturity.

The following tables (dollars in thousands) set forth certain information regarding contractual maturities and the weighted average yields of our investment securities as of the dates presented. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	Maturity as of June 30, 2019
	Due in One Year or Less					Due from One to  Five Years					Due from Five to Ten Years					Due after Ten Years
	Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)
Equity and other securities, at fair    value
Mutual funds	$	—		0.00	%	$	—		0.00	%	$	—		0.00	%	$	2,924		2.65	%
Equity securities		—		0.00	%		—		0.00	%		—		0.00	%		4,738		1.54	%
Total	$	—		0.00	%	$	—		0.00	%	$	—		0.00	%	$	7,662		1.96	%

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	Maturity as of June 30, 2019
	Due in One Year or Less					Due from One to  Five Years					Due from Five to Ten Years					Due after Ten Years
	Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)
Available-for-sale
U.S. Treasury Notes	$	14,956		2.50	%	$	30,392		2.53	%	$	—		0.00	%	$	—		0.00	%
U.S. government agencies		50,845		2.13	%		70,796		2.39	%		47,326		3.11	%		7,458		3.15	%
Obligations of states,    municipalities, and political    subdivisions		5,340		2.30	%		29,458		2.36	%		30,782		2.84	%		22,660		3.06	%
Residential mortgage-backed    securities
Agency		—		0.00	%		2,552		1.69	%		33,377		1.99	%		318,551		2.30	%
Non-agency		—		0.00	%		—		0.00	%		—		0.00	%		94,471		3.30	%
Commercial mortgage-backed    securities
Agency		—		0.00	%		7,364		3.35	%		14,360		2.84	%		101,915		2.70	%
Non-agency		—		0.00	%		—		0.00	%		—		0.00	%		31,302		2.61	%
Corporate securities		5,003		3.46	%		13,200		3.21	%		20,514		4.37	%		—		0.00	%
Other securities		—		0.00	%		—		0.00	%		—		0.00	%		15,012		4.02	%
Total	$	76,144		2.30	%	$	153,762		2.52	%	$	146,359		2.95	%	$	591,369		2.63	%

	Maturity as of June 30, 2019
	Due in One Year or Less					Due from One to  Five Years					Due from Five to Ten Years					Due after Ten Years
	Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)
Held-to-maturity
Obligations of states,     municipalities, and political     subdivisions	$	—		0.00	%	$	3,808		2.45	%	$	613		2.75	%	$	—		0.00	%
Total	$	—		0.00	%	$	3,808		2.45	%	$	613		2.75	%	$	—		0.00	%

(1) The weighted average yields are based on amortized cost.

	Maturity as of December 31, 2018
	Due in One Year or Less					Due from One to  Five Years					Due from Five to Ten Years					Due after Ten Years
	Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)
Available-for-sale
U.S. Treasury Notes	$	13,431		2.14	%	$	39,344		2.30	%	$	—		0.00	%	$	—		0.00	%
U.S. government agencies		47,773		2.05	%		90,978		2.39	%		43,701		2.91	%		4,975		2.78	%
Obligations of states,    municipalities, and political    subdivisions		5,925		2.09	%		24,655		2.40	%		17,344		2.58	%		12,762		3.16	%
Residential mortgage-backed    securities
Agency		—		0.00	%		2,449		1.36	%		34,565		1.94	%		247,024		2.18	%
Non-agency		—		0.00	%		—		0.00	%		—		0.00	%		84,998		3.48	%
Commercial mortgage-backed    securities
Agency		—		0.00	%		7,320		3.35	%		16,382		3.02	%		69,841		2.41	%
Non-agency		—		0.00	%		—		0.00	%		—		0.00	%		31,458		2.61	%
Corporate securities		3,701		3.56	%		17,044		3.21	%		13,971		4.22	%		—		0.00	%
Other securities		—		0.00	%		—		0.00	%		—		0.00	%		4,613		3.23	%
Total	$	70,830		2.15	%	$	181,790		2.47	%	$	125,963		2.76	%	$	455,671		2.53	%

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	Maturity as of December 31, 2018
	Due in One Year or Less					Due from One to  Five Years					Due from Five to Ten Years					Due after Ten Years
	Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)			Amortized Cost		Weighted Average Yield(1)
Held-to-maturity
Obligations of states,    municipalities, and political    subdivisions	$	—		0.00	%	$	5,966		2.34	%	$	10,075		2.64	%	$	7,794		2.79	%
Residential mortgage-backed    securities
Agency		—		0.00	%		—		0.00	%		—		0.00	%		40,082		2.29	%
Non-agency		—		0.00	%		—		0.00	%		—		0.00	%		35,349		3.35	%
Total	$	—		0.00	%	$	5,966		2.34	%	$	10,075		2.64	%	$	83,225		2.79	%

(1) The weighted average yields are based on amortized cost.

Total non-taxable securities classified as obligations of states, municipalities and political subdivisions were $54.6 million at June 30, 2019, a decrease of $833,000 from December 31, 2018.

There were no holdings of securities of any one issuer, other than U.S. government-sponsored entities and agencies, with total outstanding balances greater than 10% of our stockholders’ equity as of June 30, 2019 or December 31, 2018.

Restricted Stock

As a member of the Federal Home Loan Bank system, our bank is required to maintain an investment in the capital stock of the FHLB. No market exists for this stock, and it has no quoted market value. The stock is redeemable at par by the FHLB and is, therefore, carried at cost. In addition, our bank owns stock of Bankers’ Bank that was acquired as part of the Ridgestone acquisition. The stock is redeemable at par and carried at cost. As of June 30, 2019 and December 31, 2018, we held $22.9 million and $19.2 million, respectively, in FHLB and Bankers’ Bank stock. We evaluate impairment of our investment in FHLB and Bankers’ Bank based on the ultimate recoverability of the par value rather than by recognizing temporary declines in value. We did not identify any indicators of impairment of FHLB and Bankers’ Bank stock as of June 30, 2019 and December 31, 2018.

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Loan and Lease Portfolio

Lending-related income is the most important component of our net interest income and is the main driver of the results of our operations. Total loans and leases at June 30, 2019 and December 31, 2018 were $3.9 billion and $3.5 billion, respectively, an increase of $361.5 million, or 10.3%. The growth in the originated loan and lease portfolio was primarily driven by increases in commercial and industrial loans and leases. The increase in the acquired loan and lease portfolio was driven by the Oak Park River Forest acquisition and renewals of acquired non-impaired loans that are reflected within originated loans, partially offset by payoffs and maturities.

We strive to maintain a relatively diversified loan portfolio to help reduce the risk inherent in concentration in certain types of collateral. The following table shows our allocation of originated, acquired impaired and acquired non-impaired loans and leases as of the dates presented (dollars in thousands):  

	June 30, 2019						December 31, 2018
	Amount			% of Total			Amount			% of Total
Originated loans and leases
Commercial real estate	$	721,230			18.7	%	$	652,234			18.6	%
Residential real estate		501,038			13.0	%		466,309			13.3	%
Construction, land development, and other land		196,656			5.1	%		144,128			4.1	%
Commercial and industrial		992,313			25.7	%		803,508			22.9	%
Installment and other		10,937			0.3	%		11,718			0.3	%
Leasing financing receivables		162,119			4.1	%		159,901			4.6	%
Total originated loans and leases	$	2,584,293			66.9	%	$	2,237,798			63.8	%
Acquired impaired loans
Commercial real estate	$	151,127			3.9	%	$	146,808			4.2	%
Residential real estate		118,534			3.1	%		113,934			3.3	%
Construction, land development, and other land		4,220			0.1	%		3,779			0.1	%
Commercial and industrial		20,370			0.5	%		12,617			0.4	%
Installment and other		300			0.0	%		404			0.0	%
Total acquired impaired loans	$	294,551			7.6	%	$	277,542			8.0	%
Acquired non-impaired loans and leases
Commercial real estate	$	439,182			11.4	%	$	462,565			13.2	%
Residential real estate		158,190			4.1	%		124,659			3.6	%
Construction, land development, and other land		51,072			1.3	%		37,442			1.1	%
Commercial and industrial		307,887			8.0	%		328,672			9.4	%
Installment and other		1,672			0.0	%		1,596			0.0	%
Leasing financing receivables		26,301			0.7	%		31,352			0.9	%
Total acquired non-impaired loans and leases	$	984,304			25.5	%	$	986,286			28.2	%
Total loans and leases	$	3,863,148			100.0	%	$	3,501,626			100.0	%
Allowance for loan and lease losses		(31,132	)					(25,201	)
Total loans and leases, net of allowance for loan and lease losses	$	3,832,016					$	3,476,425

78

Loans collateralized by real estate comprised 60.6% and 61.5% of the loan and lease portfolio at June 30, 2019 andDecember 31, 2018, respectively. Commercial real estate loans comprised the largest portion of the real estate loan portfolio as of June 30, 2019and December 31, 2018 and totaled $1.3 billion, or 56.0%, of real estate loans and 34.0% of the total loan and lease portfolio atJune 30, 2019. AtDecember 31, 2018, commercial real estate loans totaled $1.3 billion and comprised 58.6% of real estate loans and 36.0% of the total loan and lease portfolio. Acquired impaired commercial real estate loans increased from $146.8 million as of December 31, 2018 to $151.1 million as ofJune 30, 2019, or 2.9%. At June 30, 2019 andDecember 31, 2018, commercial real estate loans, including both owner-occupied and non-owner occupied, as a percentage of total capital were 327.5% and 331.2%, respectively. Non-owner occupied commercial real estate loans were $504.9million and $502.1 million, or 87.0% and 95.0% of total capital, atJune 30, 2019 andDecember 31, 2018, respectively.

Residential real estate loans totaled $777.8 million at June 30, 2019 compared to $704.9 million at December 31, 2018, an increase of $72.9 million or 10.3%. The residential real estate loan portfolio comprised 33.2% and 32.8% of real estate loans as of June 30, 2019 and December 31, 2018, respectively, and 20.1% of total loans and leases at June 30, 2019 and December 31, 2018. Acquired impaired residential real estate loans increased from $113.9 million at December 31, 2018 to $118.5 million at June 30, 2019, or 4.0%.

Construction, land development and other land loans totaled $251.9 million at June 30, 2019 compared to $185.3 million at December 31, 2018, an increase of $66.6 million or 35.9%. The construction, land development and other land loan portfolio comprised 10.8% and 8.6% of real estate loans at June 30, 2019 and December 31, 2018, respectively, and 6.5% and 5.3% of the total loan and lease portfolio at June 30, 2019 and December 31, 2018, respectively.

Commercial and industrial loans totaled $1.3 billion and $1.1 billion at June 30, 2019 and December 31, 2018, respectively, an increase of $175.8 million or 15.4% primarily due to organic growth and the acquisition. The commercial and industrial loan portfolio comprised 34.2% and 32.7% of the total loan and lease portfolio at June 30, 2019 and December 31, 2018, respectively.

Lease financing receivables comprised 4.9% and 5.5% of the loan and lease portfolio at June 30, 2019 and December 31, 2018, respectively. Total lease financing receivables were $188.4 million and $191.3 million at June 30, 2019 and December 31, 2018, respectively, a decrease of $2.8 million, or 1.5%, primarily due to payoffs during the period.

79

Loan and Lease Portfolio Maturities and Interest Rate Sensitivity

The following table shows our loan and lease portfolio by scheduled maturity at June 30, 2019 (dollars in thousands):

	Due in One Year or Less				Due after One Year Through Five Years				Due after Five Years
	Fixed Rate		Floating Rate		Fixed Rate		Floating Rate		Fixed Rate		Floating Rate		Total
Originated loans and leases
Commercial real estate	$	46,090	$	48,539	$	225,672	$	152,381	$	59,671	$	188,877	$	721,230
Residential real estate		15,558		29,590		92,622		79,255		221,964		62,049		501,038
Construction, land development, and other land		1,501		37,421		26,828		118,100		633		12,173		196,656
Commercial and industrial		13,977		218,457		83,688		311,257		98,244		266,690		992,313
Installment and other		379		8,761		1,306		82		409		—		10,937
Leasing financing receivables		5,354		—		143,518		—		13,247		—		162,119
Total originated loans and leases	$	82,859	$	342,768	$	573,634	$	661,075	$	394,168	$	529,789	$	2,584,293
Acquired impaired loans
Commercial real estate	$	38,319	$	1,600	$	86,743	$	8,287	$	10,075	$	6,103	$	151,127
Residential real estate		28,210		2,158		56,728		5,370		19,335		6,733		118,534
Construction, land development, and other land		1,322		891		2,007		—		—		—		4,220
Commercial and industrial		2,131		8,458		6,113		335		2,293		1,040		20,370
Installment and other		1		—		83		—		216		—		300
Total acquired impaired loans	$	69,983	$	13,107	$	151,674	$	13,992	$	31,919	$	13,876	$	294,551
Acquired non-impaired loans and    leases
Commercial real estate	$	63,521	$	14,895	$	209,912	$	23,113	$	21,489	$	106,252	$	439,182
Residential real estate		10,385		14,174		50,698		60,636		3,781		18,516		158,190
Construction, land development, and other land		226		17,575		4,508		22,168		6,595		—		51,072
Commercial and industrial		17,938		108,345		75,099		43,877		12,489		50,139		307,887
Installment and other		315		141		1,013		176		27		—		1,672
Leasing financing receivables		1,979		—		24,060		—		262		—		26,301
Total acquired non-impaired loans and leases	$	94,364	$	155,130	$	365,290	$	149,970	$	44,643	$	174,907	$	984,304
Total loans and leases	$	247,206	$	511,005	$	1,090,598	$	825,037	$	470,730	$	718,572	$	3,863,148

At June 30, 2019, 46.8% of the loan and lease portfolio bears interest at fixed rates and 53.2% at floating rates. The expected life of our loan portfolio will differ from contractual maturities because borrowers may have the right to curtail or prepay their loans with or without penalties. Because a portion of the portfolio is accounted for under ASC 310-30, the carrying value is significantly affected by estimates and it is impracticable to allocate scheduled payments for those loans based on those estimates. Consequently, the tables presented include information limited to contractual maturities of the underlying loans.

80

Allowance for Loan and Lease Losses

The ALLL is determined by us on a quarterly basis, although we are engaged in monitoring the appropriate level of the allowance on a more frequent basis. The ALLL reflects management’s estimate of probable incurred credit losses inherent in the loan and lease portfolios. The computation includes elements of judgement and high levels of subjectivity.

Factors considered by us include, but are not limited to, actual loss experience, peer loss experience, changes in size and risk profile of the portfolio, identification of individual problem loan and lease situations which may affect a borrower’s ability to repay, and evaluation of the prevailing economic conditions. Changes in conditions may necessitate revision of the estimate in future periods.

We assess the ALLL based on three categories: (i) originated loans and leases, (ii) acquired non-impaired loans and leases, and (iii) acquired impaired loans with further credit deterioration after the acquisitions or our recapitalization.

Total ALLL was $31.1 million at June 30, 2019 compared to $25.2 million at December 31, 2018, an increase of $5.9 million, or 23.5%. The increase was primarily due to increases in the general reserve driven by newly originated loans and leases and renewals of acquired non-impaired loans that are also reflected with originated loans and leases, and specific impairments in the unguaranteed portion of the U.S. government guaranteed portfolio.

Total ALLL to total loans and leases held for investment, net before ALLL, was 0.81% and 0.72% of total loans and leases at June 30, 2019 and December 31, 2018, respectively. The increase was primarily driven by an increase in the general reserve resulting from originated loan and lease growth and an increase in specific impairments in the unguaranteed portion of the U.S. government guaranteed portfolio. We valued significant amounts of acquired loans at fair value at acquisition date as a result of our recapitalization, the Ridgestone acquisition, the First Evanston acquisition, and the Oak Park River Forest acquisition. As a result of marking these acquired loans to fair value, management believes that this reduces the need to reserve for these loans for a period after acquisition, in accordance with applicable accounting guidance. Acquisition accounting adjustments remaining on loans from our recapitalization, the Ridgestone acquisition, the First Evanston acquisition, and the Oak Park River Forest acquisition totaled $37.1 million and $34.0 million at June 30, 2019 and December 31, 2018, respectively.

81

The following table presents an analysis of the allowance of the loan and lease losses for the periods presented (dollars in thousands):  

	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Balance at March 31, 2019	$	6,660		$	1,970		$	536		$	15,630		$	63		$	2,247		$	27,106
Provision (release) for acquired impaired loans		324			(100	)		15			338			—			—			577
Provision (release) for acquired non-impaired loans and leases		1,188			8			22			1,042			1			(63	)		2,198
Provision for originated loans		1,183			30			118			1,940			7			338			3,616
Total provision (release)	$	2,695		$	(62	)	$	155		$	3,320		$	8		$	275		$	6,391
Charge-offs for acquired impaired loans		(110	)		—			—			(450	)		—			—			(560	)
Charge-offs for acquired non-impaired loans and leases		(400	)		—			—			(1,243	)		—			—			(1,643	)
Charge-offs for originated loans and leases		(308	)		(9	)		—			(134	)		(4	)		(622	)		(1,077	)
Total charge-offs	$	(818	)	$	(9	)	$	—		$	(1,827	)	$	(4	)	$	(622	)	$	(3,280	)
Recoveries for acquired impaired loans		396			270			—			—			—			—			666
Recoveries for acquired non-impaired loans and leases		1			1			—			—			—			16			18
Recoveries for originated loans and leases		—			1			—			3			—			227			231
Total recoveries	$	397		$	272		$	—		$	3		$	—		$	243		$	915
Less: Net charge-offs (recoveries)		421			(263	)		—			1,824			4			379			2,365
Acquired impaired loans		1,726			590			15			1,142			2			—			3,475
Acquired non-impaired loans and leases		2,241			16			22			3,068			1			300			5,648
Originated loans and leases		4,967			1,565			654			12,916			64			1,843			22,009
Balance at June 30, 2019	$	8,934		$	2,171		$	691		$	17,126		$	67		$	2,143		$	31,132
Ending ALLL balance
Acquired impaired loans	$	1,726		$	590		$	15		$	1,142		$	2		$	—		$	3,475
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		2,775			22			—			6,489			—			—			9,286
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		4,433			1,559			676			9,495			65			2,143			18,371
Balance at June 30, 2019	$	8,934		$	2,171		$	691		$	17,126		$	67		$	2,143		$	31,132
Loans and leases ending balance
Acquired impaired loans	$	151,127		$	118,534		$	4,220		$	20,370		$	300		$	—		$	294,551
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		18,707			2,899			—			24,278			—			—			45,884
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		1,141,705			656,329			247,728			1,275,922			12,609			188,420			3,522,713
Total loans and leases at June 30, 2019, gross	$	1,311,539		$	777,762		$	251,948		$	1,320,570		$	12,909		$	188,420		$	3,863,148
Ratio of net charge-offs (recoveries) to average loans and leases outstanding during the period (annualized)
Acquired impaired loans		(0.03	)%		(0.03	)%		0.00	%		0.05	%		0.00	%		0.00	%		(0.01	)%
Acquired non-impaired loans and leases		0.04	%		0.00	%		0.00	%		0.13	%		0.00	%		0.00	%		0.17	%
Originated loans and leases		0.04	%		0.00	%		0.00	%		0.01	%		0.00	%		0.04	%		0.09	%
Loans and leases ending balance as a percentage of total loans and leases, gross
Acquired impaired loans		3.91	%		3.07	%		0.11	%		0.52	%		0.01	%		0.00	%		7.62	%
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		0.48	%		0.08	%		0.00	%		0.63	%		0.00	%		0.00	%		1.19	%
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		29.55	%		16.99	%		6.41	%		33.03	%		0.33	%		4.88	%		91.19	%

82

	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Balance at December 31, 2018	$	7,540		$	1,751		$	466		$	12,932		$	49		$	2,463		$	25,201
Provision (release) for acquired impaired loans		194			(47	)		15			681			—			—			843
Provision (release) for acquired non-impaired loans and leases		1,549			(95	)		5			1,132			1			(222	)		2,370
Provision for originated loans		1,394			298			205			4,539			21			720			7,177
Total provision	$	3,137		$	156		$	225		$	6,352		$	22		$	498		$	10,390
Charge-offs for acquired impaired loans		(110	)		—			—			(666	)		—			—			(776	)
Charge-offs for acquired non-impaired loans and leases		(1,751	)		—			—			(1,379	)		—			—			(3,130	)
Charge-offs for originated loans and leases		(308	)		(9	)		—			(134	)		(4	)		(1,267	)		(1,722	)
Total charge-offs	$	(2,169	)	$	(9	)	$	—		$	(2,179	)	$	(4	)	$	(1,267	)	$	(5,628	)
Recoveries for acquired impaired loans		398			270			—			4			—			—			672
Recoveries for acquired non-impaired loans and leases		28			2			—			20			—			118			168
Recoveries for originated loans and leases		—			1			—			(3	)		—			331			329
Total recoveries	$	426		$	273		$	—		$	21		$	—		$	449		$	1,169
Less: Net charge-offs (recoveries)		1,743			(264	)		—			2,158			4			818			4,459
Acquired impaired loans		1,726			590			15			1,142			2			—			3,475
Acquired non-impaired loans and leases		2,241			16			22			3,068			1			300			5,648
Originated loans and leases		4,967			1,565			654			12,916			64			1,843			22,009
Balance at June 30, 2019	$	8,934		$	2,171		$	691		$	17,126		$	67		$	2,143		$	31,132
Ending ALLL balance
Acquired impaired loans	$	1,726		$	590		$	15		$	1,142		$	2		$	—		$	3,475
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		2,775			22			—			6,489			—			—			9,286
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		4,433			1,559			676			9,495			65			2,143			18,371
Balance at June 30, 2019	$	8,934		$	2,171		$	691		$	17,126		$	67		$	2,143		$	31,132
Loans and leases ending balance
Acquired impaired loans	$	151,127		$	118,534		$	4,220		$	20,370		$	300		$	—		$	294,551
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		18,707			2,899			—			24,278			—			—			45,884
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		1,141,705			656,329			247,728			1,275,922			12,609			188,420			3,522,713
Total loans and leases at June 30, 2019, gross	$	1,311,539		$	777,762		$	251,948		$	1,320,570		$	12,909		$	188,420		$	3,863,148
Ratio of net charge-offs (recoveries) to average loans and leases outstanding during the period (annualized)
Acquired impaired loans		(0.02	)%		(0.01	)%		0.00	%		0.04	%		0.00	%		0.00	%		0.01	%
Acquired non-impaired loans and leases		0.09	%		0.00	%		0.00	%		0.08	%		0.00	%		(0.01	)%		0.16	%
Originated loans and leases		0.02	%		0.00	%		0.00	%		0.01	%		0.00	%		0.05	%		0.08	%
Loans and leases ending balance as a percentage of total loans and leases, gross
Acquired impaired loans		3.91	%		3.07	%		0.11	%		0.52	%		0.01	%		0.00	%		7.62	%
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		0.48	%		0.08	%		0.00	%		0.63	%		0.00	%		0.00	%		1.19	%
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		29.55	%		16.99	%		6.41	%		33.03	%		0.33	%		4.88	%		91.19	%

83

	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Balance at March 31, 2018	$	5,319		$	1,564		$	201		$	7,763		$	61		$	2,732		$	17,640
Provision (release) for acquired impaired loans		(259	)		(25	)		(2	)		(242	)		(1	)		—			(529	)
Provision (release) for acquired non-impaired loans and leases		672			(17	)		—			1,055			—			66			1,776
Provision for originated loans		924			126			132			1,143			2			382			2,709
Total provision	$	1,337		$	84		$	130		$	1,956		$	1		$	448		$	3,956
Charge-offs for acquired impaired loans		(159	)		—			—			(58	)		(32	)		—			(249	)
Charge-offs for acquired non-impaired loans and leases		—			—			—			(1,167	)		—			(126	)		(1,293	)
Charge-offs for originated loans and leases		(43	)		—			—			(371	)		—			(429	)		(843	)
Total charge-offs	$	(202	)	$	—		$	—		$	(1,596	)	$	(32	)	$	(555	)	$	(2,385	)
Recoveries for acquired impaired loans		—			—			—			—			—			—			—
Recoveries for acquired non-impaired loans and leases		—			—			—			—			—			79			79
Recoveries for originated loans and leases		—			—			—			246			—			151			397
Total recoveries	$	—		$	—		$	—		$	246		$	—		$	230		$	476
Less: Net charge-offs		202			0			—			1,350			32			325			1,909
Acquired impaired loans		1,502			350			22			874			3			—			2,751
Acquired non-impaired loans and leases		2,424			174			3			1,713			—			472			4,786
Originated loans and leases		2,527			1,124			307			5,782			27			2,383			12,150
Balance at June 30, 2018	$	6,453		$	1,648		$	332		$	8,369		$	30		$	2,855		$	19,687
Ending ALLL balance
Acquired impaired loans	$	1,502		$	350		$	22		$	874		$	3		$	—		$	2,751
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		2,199			127			—			2,555			14			—			4,895
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		2,752			1,171			310			4,940			13			2,855			12,041
Balance at June 30, 2018	$	6,453		$	1,648		$	332		$	8,369		$	30		$	2,855		$	19,687
Loans and leases ending balance
Acquired impaired loans	$	162,621		$	129,737		$	4,860		$	15,347		$	521		$	—		$	313,086
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		16,397			2,273			—			14,889			14			—			33,573
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		1,055,969			567,578			183,756			995,584			12,271			186,875			3,002,033
Total loans and leases at June 30, 2018, gross	$	1,234,987		$	699,588		$	188,616		$	1,025,820		$	12,806		$	186,875		$	3,348,692
Ratio of net charge-offs to average loans and leases outstanding during the period (annualized)
Acquired impaired loans		0.03	%		0.00	%		0.00	%		0.01	%		0.01	%		0.00	%		0.05	%
Acquired non-impaired loans and leases		0.00	%		0.00	%		0.00	%		0.21	%		0.00	%		0.01	%		0.22	%
Originated loans and leases		0.01	%		0.00	%		0.00	%		0.02	%		0.00	%		0.05	%		0.08	%
Loans and leases ending balance as a percentage of total loans and leases, gross
Acquired impaired loans		4.86	%		3.87	%		0.15	%		0.46	%		0.02	%		0.00	%		9.35	%
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		0.49	%		0.07	%		0.00	%		0.44	%		0.00	%		0.00	%		1.00	%
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		31.53	%		16.95	%		5.49	%		29.73	%		0.37	%		5.58	%		89.65	%

84

	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Balance at December 31, 2017	$	4,794		$	1,638		$	222		$	7,418		$	41		$	2,593		$	16,706
Provision (release) for acquired impaired loans		(33	)		(83	)		363			(343	)		17			—			(79	)
Provision for acquired non-impaired loans and leases		1,159			(17	)		1			1,703			—			(67	)		2,779
Provision for originated loans		1,144			110			164			4,020			4			929			6,371
Total provision	$	2,270		$	10		$	528		$	5,380		$	21		$	862		$	9,071
Charge-offs for acquired impaired loans		(393	)		—			(418	)		(201	)		(32	)		—			(1,044	)
Charge-offs for acquired non-impaired loans and leases		(78	)		—			—			(1,985	)		—			(137	)		(2,200	)
Charge-offs for originated loans and leases		(140	)		—			—			(2,495	)		—			(928	)		(3,563	)
Total charge-offs	$	(611	)	$	—		$	(418	)	$	(4,681	)	$	(32	)	$	(1,065	)	$	(6,807	)
Recoveries for acquired impaired loans		—			—			—			—			—			—			—
Recoveries for acquired non-impaired loans and leases		—			—			—			6			—			160			166
Recoveries for originated loans and leases		—			—			—			246			—			305			551
Total recoveries	$	—		$	—		$	—		$	252		$	—		$	465		$	717
Less: Net charge-offs		611			—			418			4,429			32			600			6,090
Acquired impaired loans		1,502			350			22			874			3			—			2,751
Acquired non-impaired loans and leases		2,424			174			3			1,713			—			472			4,786
Originated loans and leases		2,527			1,124			307			5,782			27			2,383			12,150
Balance at June 30, 2018	$	6,453		$	1,648		$	332		$	8,369		$	30		$	2,855		$	19,687
Ending ALLL balance
Acquired impaired loans	$	1,502		$	350		$	22		$	874		$	3		$	—		$	2,751
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		2,199			127			—			2,555			14			—			4,895
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		2,752			1,171			310			4,940			13			2,855			12,041
Balance at June 30, 2018	$	6,453		$	1,648		$	332		$	8,369		$	30		$	2,855		$	19,687
Loans and leases ending balance
Acquired impaired loans	$	162,621		$	129,737		$	4,860		$	15,347		$	521		$	—		$	313,086
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		16,397			2,273			—			14,889			14			—			33,573
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		1,055,969			567,578			183,756			995,584			12,271			186,875			3,002,033
Total loans and leases at June 30, 2018, gross	$	1,234,987		$	699,588		$	188,616		$	1,025,820		$	12,806		$	186,875		$	3,348,692
Ratio of net charge-offs to average loans and leases outstanding during the period (annualized)
Acquired impaired loans		0.07	%		0.00	%		0.07	%		0.04	%		0.01	%		0.00	%		0.19	%
Acquired non-impaired loans and leases		0.01	%		0.00	%		0.00	%		0.35	%		0.00	%		0.00	%		0.36	%
Originated loans and leases		0.02	%		0.00	%		0.00	%		0.40	%		0.00	%		0.11	%		0.54	%
Loans and leases ending balance as a percentage of total loans and leases, gross
Acquired impaired loans		4.86	%		3.87	%		0.15	%		0.46	%		0.02	%		0.00	%		9.35	%
Acquired non-impaired loans and leases and originated loans individually evaluated for impairment		0.49	%		0.07	%		0.00	%		0.44	%		0.00	%		0.00	%		1.00	%
Acquired non-impaired loans and leases and originated loans and leases collectively evaluated for impairment		31.53	%		16.95	%		5.49	%		29.73	%		0.37	%		5.58	%		89.65	%

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Non-Performing Assets

Non-performing loans and leases include loans and leases 90 days past due and still accruing, loans and leases accounted for on a non-accrual basis and accruing restructured loans. Non-performing assets consist of non-performing loans and leases plus other real estate owned. Non-performing assets at June 30, 2019 and December 31, 2018 totaled $44.6 million and $33.0 million, respectively, an increase of $11.6 million or 35.4%. The increase was primarily driven by defaults in the U.S. government guaranteed loan portfolio. Non-performing assets consisted of $6.3 million and $4.6 million of U.S. government guaranteed balances at June 30, 2019 and December 31, 2018, respectively.

Total non-accrual loans and leases increased by $8.2 million between December 31, 2018 and June 30, 2019 due to additional non-accrual loans primarily from the downgrades of U.S. government guaranteed loans. The U.S. government guaranteed portion of non-performing loans totaled $4.7 million at June 30, 2019 and $4.6 million at December 31, 2018.

Total accruing loans past due decreased from $24.5 million at December 31, 2018 to $17.9 million at June 30, 2019. This represents a decrease of $6.6 million, or 26.9%, and can be attributed to decreases in commercial and industrial, primarily in the 30-59 days past due category, partially offset by increases in construction, land development, and other land. See Note 6 of our Unaudited Interim Condensed Consolidated Financial Statements, included in this report, for further information.  

Total OREO increased from $5.3 million at December 31, 2018 to $8.1 million at June 30, 2019. The $2.8 million increase in OREO resulted primarily from net additions of $2.2 million to OREO as a result of the Oak Park River Forest acquisition, loan foreclosures and deeds in lieu of loan foreclosures totaling $2.1 million, partially offset by dispositions of $1.4 million, and valuation adjustments of $163,000. The government guaranteed portion of OREO was $1.5 million at June 30, 2019.

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The following table sets forth the amounts of non-performing loans and leases, non-performing assets, and OREO at the dates indicated (dollars in thousands):

	June 30, 2019			December 31, 2018
Non-performing assets:
Non-accrual loans and leases(1)(2)(3)	$	34,027		$	25,834
Past due loans and leases 90 days or more and still    accruing interest		996			—
Accruing troubled debt restructured loans		1,529			1,813
Total non-performing loans and leases		36,552			27,647
Other real estate owned		8,070			5,314
Total non-performing assets	$	44,622		$	32,961
Total non-performing loans and leases as a percentage of total    loans and leases		0.95	%		0.79	%
Total non-performing assets as a percentage of    total assets		0.83	%		0.67	%
Allowance for loan and lease losses as a percentage of    non-performing loans and leases		85.17	%		91.15	%
Non-performing assets guaranteed by U.S.    government:
Non-accrual loans guaranteed	$	4,723		$	4,245
Past due loans 90 days or more and still accruing interest    guaranteed		—			—
Accruing troubled debt restructured loans guaranteed		—			381
Total non-performing loans guaranteed		4,723			4,626
Other real estate owned guaranteed		1,539		—
Total non-performing assets guaranteed	$	6,262		$	4,626
Total non-performing loans and leases not guaranteed as    a percentage of total loans and leases		0.82	%		0.66	%
Total non-performing assets not guaranteed as a    percentage of total assets		0.71	%		0.57	%

(1) Includes $7.8 million and $7.3 million of non-accrual restructured loans at June 30, 2019 and December 31, 2018.

(2) For the six months ended June 30, 2019, $1.2 million in interest income would have been recorded had non-accrual loans been current.

(3) For the six months ended June 30, 2019, $231,000 in interest income would have been recorded had troubled debt restructurings included within non-accrual loans been current.

Acquired impaired loans (accounted for under ASC 310-30) that are delinquent and/or on non-accrual status continue to accrue income provided the respective pool in which those assets reside maintains a discount and recognizes accretion income. The aforementioned loans are characterized as performing loans based on contractual delinquency. If the pool no longer has a discount and accretion income can no longer be recognized, any loan within that pool on non-accrual status will be classified as non-accrual for presentation purposes.

Deposits

We gather deposits primarily through each of our 60 branch locations in the Chicago metropolitan area and one branch in Brookfield, Wisconsin. Through our branch network, online, mobile and direct banking channels, we offer a variety of deposit products including demand deposit accounts, interest-bearing products, savings accounts, and certificates of deposit. We offer competitive online, mobile and direct banking channels. Small businesses are a significant source of low cost deposits as they value convenience, flexibility and access to local decision makers that are responsive to their needs. Deposits assumed from the Oak Park River Forest and First Evanston acquisitions were recorded at fair value using the acquisition method of accounting in accordance with ASC Topic 805.

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Total deposits at June 30, 2019 were$4.1 billion, representing an increase of$310.3million, or8.3%, compared to $3.7 billion atDecember 31, 2018. Non-interest-bearing deposits were $1.2 billion, or 30.5% of total deposits, atJune 30, 2019, an increase of $47.5 million, or4.0%, compared to $1.2 billion atDecember 31, 2018, or 31.8% of total deposits. Core deposits were81.0% and 81.7% of total deposits at June 30, 2019 and December 31, 2018, respectively.

The following table shows the average balance amounts and the average contractual rates paid on our deposits for the periods indicated (dollars in thousands):

	For the Three Months Ended June 30, 2019					For the Three Months Ended June 30, 2018
	Average Balance		Average Rate			Average Balance		Average Rate
Non-interest-bearing demand deposits	$	1,254,173		0.00	%	$	891,175		0.00	%
Interest checking		333,725		0.54	%		227,760		0.22	%
Money market accounts		695,986		1.03	%		469,066		0.67	%
Savings		477,775		0.10	%		454,295		0.07	%
Time deposits (below $100,000)		508,247		1.93	%		403,964		1.12	%
Time deposits ($100,000 and above)		770,241		2.34	%		460,384		1.42	%
Total	$	4,040,147		0.92	%	$	2,906,644		0.52	%

	For the Six Months Ended June 30, 2019					For the Six Months Ended June 30, 2018
	Average Balance		Average Rate			Average Balance		Average Rate
Non-interest-bearing demand deposits	$	1,220,266		0.00	%	$	817,908		0.00	%
Interest checking		313,499		0.56	%		207,337		0.16	%
Money market accounts		654,723		1.00	%		407,647		0.57	%
Savings		474,509		0.11	%		445,663		0.07	%
Time deposits (below $100,000)		483,143		1.80	%		388,048		1.07	%
Time deposits ($100,000 and above)		754,039		2.33	%		411,362		1.33	%
Total	$	3,900,179		0.90	%	$	2,677,965		0.47	%

The increase in time deposits was driven by promotional campaigns during the first and second quarters of 2019. Our average cost of deposits was 92 basis points during the second quarter of 2019 compared to 52 basis points during the second quarter of 2018. This increase was primarily attributed to higher rates on interest-bearing deposits as a result of the interest rate environment and local competition. We had $70.0 million and $50.0 million of brokered time deposits at June 30, 2019 and December 31, 2018, respectively.

The following table shows time deposits and other time deposits of $100,000 or more by time remaining until maturity (dollars in thousands):

	At June 30, 2019
	Time Deposits
Three months or less	$	83,823
Over three months through six months		175,295
Over six months through 12 months		450,379
Over 12 months		52,690
Total	$	762,187

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Borrowed Funds

In addition to deposits, we also utilize FHLB advances as a supplementary funding source to finance our operations. The bank’s advances from the FHLB are collateralized by residential and multi-family real estate loans and securities. At June 30, 2019 and December 31, 2018, we had maximum borrowing capacity from the FHLB of $1.8 billion and $1.7 billion, respectively, subject to the availability of collateral. During the six months ended June 30, 2019, outstanding FHLB advances increased to $500.0 million, from $425.0 million at December 31, 2018, resulting from loan and lease growth.

The following table sets forth certain information regarding our short-term borrowings at the dates and for the periods indicated (dollars in thousands):

	Six MonthsEnded June 30,
	2019			2018
Federal Home Loan Bank advances:
Average balance outstanding	$	429,890		$	353,125
Maximum outstanding at any month-end period during    the year		500,000			420,000
Balance outstanding at end of period		500,000			420,000
Weighted average interest rate during period		2.00	%		1.55	%
Weighted average interest rate at end of period		2.42	%		2.01	%
Line of credit:
Average balance outstanding	$	973		$	—
Maximum outstanding at any month-end period during    the year		5,680			—
Balance outstanding at end of period		—			—
Weighted average interest rate during period		5.32	%	N/A
Weighted average interest rate at end of period(1)	N/A			N/A

(1) We amended the credit agreement, which extended the maturity date to October, 2019. The amended revolving line of credit bears interest at either the LIBOR Rate plus 225 basis points or the Prime Rate minus 50 basis points, based on our election, which is required to be communicate to the lender at least three business days prior to the commencement of an interest period. If we fail to provide timely notification, the interest rate will be Prime Rate minus 50 basis points.

At June 30, 2019, FHLB advances have maturities ranging from July 2019 to September 2019.

Customer Repurchase Agreements (Sweeps)

Securities sold under agreements to repurchase represent a demand deposit product offered to customers that sweep balances in excess of the FDIC insurance limit into overnight repurchase agreements. We pledge securities as collateral for the repurchase agreements. Securities sold under agreements to repurchase decreased by $1.3 million, from $34.2 million at December 31, 2018 to $32.9 million at June 30, 2019.

Liquidity

We manage liquidity based upon factors that include the amount of core deposits as a percentage of total deposits, the level of diversification of our funding sources, the amount of non-deposit funding used to fund assets, the availability of unused funding sources, off-balance sheet obligations, the availability of assets to be readily converted into cash without undue loss, the amount of cash and liquid securities we hold and the re-pricing characteristics and maturities of our assets when compared to the re-pricing characteristics of our liabilities, the ability to securitize and sell certain pools of assets and other factors.

Our liquidity needs are primarily met by cash and investment securities positions, growth in deposits, cash flow from amortizing loan portfolios, and borrowings from the FHLB. For additional information regarding our operating, investing, and financing cash flows, see Consolidated Statements of Cash Flows in our Unaudited Interim Condensed Consolidated Financial Statements included elsewhere in this report.

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As ofJune 30, 2019, Byline Bank had maximum borrowing capacity from the FHLB of $1.8billion and $278.8 million from the Federal Reserve Bank (“FRB”). As ofJune 30, 2019, Byline Bank had open advances of $500.0 million and open letters of credit of $20.4 million, leaving us with available aggregate borrowing capacity of $1.2billion. In addition, Byline Bank had uncommitted federal funds lines available of $105.0 million.

As of December 31, 2018, Byline Bank had maximum borrowing capacity from the FHLB of $1.7 billion and $293.6 million from the FRB. As of December 31, 2018, Byline Bank had open advances of $425.0 million and open letters of credit of $32.6 million, leaving us with available aggregate borrowing capacity of $1.3 billion. In addition, Byline Bank had an uncommitted federal funds line available of $55.0 million.

On October 13, 2016, we entered into a $30.0 million revolving credit agreement with a correspondent bank. In April 2017, the revolving line of credit was amended to a non-revolving line of credit as long as the outstanding balance exceeds $5.0 million. When the outstanding balance was reduced to $5.0 million, the line of credit was converted to a revolving line of credit with credit availability up to $5.0 million until maturity. In July 2017, we repaid the outstanding balance, in full, under this line of credit of $16.2 million with proceeds from our initial public offering. On October 11, 2018, the Company entered into a third amendment to the revolving credit agreement, which increased the revolving loan commitment to $10.0 million, extended the maturity of the credit facility to October 10, 2019, and makes certain other changes, including a release of the previously executed Stock Pledge Agreement dated October 13, 2016, and execution of a Negative Pledge Agreement dated October 11, 2018. As of June 30, 2019, no balance was outstanding on the line of credit.

On April 30, 2019, the Company drew on the line of credit for $5.7 million and selected the LIBOR plus 225 basis points interest rate option. The funds were utilized to repay a line of credit assumed as a result of the Oak Park River Forest acquisition. The Company repaid the $5.7 million outstanding balance of the line of credit in full on May 31, 2019.

There are regulatory limitations that affect the ability of Byline Bank to pay dividends to the Company. See Note 21 of our Consolidated Financial Statements, included in our Annual Report on Form 10-K for the year ended December 31, 2018 for additional information. Management believes that such limitations will not impact our ability to meet our ongoing short-term cash obligations.

We expect that our cash and liquidity resources will be generated by the operations of Byline Bank, which we expect to be sufficient to satisfy our liquidity and capital requirements for at least the next twelve months.

Capital Resources

Stockholders’ equity at June 30, 2019 was $717.7 million compared to $650.7 million at December 31, 2018, an increase of $67.0 million, or 10.3%. The increase was primarily driven by the acquisition of Oak Park River Forest, the issuance of common stock upon the exercise of stock options, retained earnings, and a decrease to other comprehensive loss.  

The Company and Byline Bank are subject to various regulatory capital requirements administered by federal banking regulators. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by federal banking regulators that, if undertaken, could have a direct material effect on our financial statements.

Under applicable bank regulatory capital requirements, each of the Company and Byline Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Byline Bank must also meet certain specific capital guidelines under the prompt corrective action framework. The capital amounts and classification are subject to qualitative judgments by the federal banking regulators about components, risk weightings and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company and Byline Bank to maintain minimum amounts and ratios of CET1 Capital, Tier 1 capital and total capital to risk-weighted assets and of Tier 1 capital to average consolidated assets, (referred to as the “leverage ratio”), as defined under these capital requirements.

As of June 30, 2019, Byline Bank exceeded all applicable regulatory capital requirements and was considered “well-capitalized.” There have been no conditions or events since June 30, 2019 that management believes have changed Byline Bank’s classifications.

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The regulatory capital ratios for the Company and Byline Bank to meet the minimum capital adequacy standards and for Byline Bank to be considered well capitalized under the prompt corrective action framework and the Company’s and Byline Bank’s actual capital amounts and ratios are set forth in the following tables as of the periods indicated (dollars in thousands):

	Actual					Minimum Capital Required					Required to be Considered Well Capitalized
June 30, 2019	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total capital to risk weighted assets:
Company	$	595,847		13.71	%	$	347,721		8.00	%	N/A		N/A
Bank		580,084		13.35	%		347,641		8.00	%	$	434,552		10.00	%
Tier 1 capital to risk weighted assets:
Company	$	563,448		12.96	%	$	260,791		6.00	%	N/A		N/A
Bank		547,685		12.60	%		260,731		6.00	%	$	347,641		8.00	%
Common Equity Tier 1 (CET1) to risk weighted    assets:
Company	$	506,510		11.65	%	$	195,593		4.50	%	N/A		N/A
Bank		547,685		12.60	%		195,548		4.50	%	$	282,459		6.50	%
Tier 1 capital to average assets:
Company	$	563,448		11.09	%	$	203,214		4.00	%	N/A		N/A
Bank		547,685		10.57	%		207,238		4.00	%	$	259,047		5.00	%

	Actual					Minimum Capital Required					Required to be Considered Well Capitalized
December 31, 2018	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total capital to risk weighted assets:
Company	$	551,079		13.99	%	$	315,093		8.00	%	N/A		N/A
Bank		528,329		13.40	%		315,455		8.00	%	$	394,318		10.00	%
Tier 1 capital to risk weighted assets:
Company	$	523,808		13.30	%	$	236,320		6.00	%	N/A		N/A
Bank		501,058		12.71	%		236,591		6.00	%	$	315,455		8.00	%
Common Equity Tier 1 (CET1) to risk weighted    assets:
Company	$	466,870		11.85	%	$	177,240		4.50	%	N/A		N/A
Bank		501,058		12.71	%		177,443		4.50	%	$	256,307		6.50	%
Tier 1 capital to average assets:
Company	$	523,808		11.05	%	$	189,587		4.00	%	N/A		N/A
Bank		501,058		10.56	%		189,797		4.00	%	$	237,246		5.00	%

The Company and Byline Bank must maintain a capital conservation buffer consisting of CET1 capital greater than 2.5% of risk-weighted assets above the required minimum risk-based capital levels in order to avoid limitations on paying dividends, repurchasing shares, and paying discretionary bonuses. The conservation buffers for the Company and Byline Bank exceed the minimum capital requirement as of June 30, 2019.

Provisions of state and federal banking regulations may limit, by statute, the amount of dividends that may be paid to the Company by Byline Bank without prior approval of Byline Bank’s regulatory agencies. The Company is economically dependent on the cash dividends received from Byline Bank. These dividends represent the primary cash flow from operating activities used to service obligations. For the six months ended June 30, 2019 and year ended December 31, 2018, the Company received $4.5 million and $2.9 million, respectively, in cash dividends from Byline Bank in order to pay the required interest on its outstanding junior subordinated debentures in connection with its trust preferred securities interest, dividends on the Series B preferred stock outstanding, and to fund other Company-related activities.

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Contractual Obligations

FHLB advances are fully described in Note 12 of our Unaudited Interim Condensed Consolidated Financial Statements, included elsewhere in this report. Operating lease obligations are in place for facilities and land on which banking facilities are located. See Note 15 of our Unaudited Interim Condensed Consolidated Financial Statements, included elsewhere in this report for additional information.

Off-Balance Sheet Items and Other Financing Arrangements

We are a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit, commercial letters of credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Statements of Financial Condition. The contractual or notional amounts of those instruments reflect the extent of involvement we have in particular classes of financial instruments.

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amount does not necessarily represent future cash requirements. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by Byline Bank upon extension of credit, is based on management’s credit evaluation of the counterparty. Collateral is primarily obtained in the form of commercial and residential real estate (including income producing commercial properties).

Letters of credit are conditional commitments issued by Byline Bank to guarantee the performance of a customer to a third-party. Those guarantees are primarily issued to support public and private borrowing arrangements, bond financing and similar transactions. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.

Commitments to make loans are generally made for periods of 90 days or less. The fixed rate loan commitments have interest rates ranging from 2.48% to 18.00% and maturities up to 2042. Variable rate loan commitments have interest rates ranging from 3.00% to 10.00% and maturities up to 2048.

Our exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual or notional amount of those instruments. We use the same credit policies in making commitments and conditional obligations as for funded instruments. We do not anticipate any material losses as a result of the commitments and standby letters of credit.

We enter into interest rate swaps that are used to manage differences in the amount, timing, and duration of our known or expected cash receipts and its known or expected cash payments principally related to certain variable rate borrowings. We also enter into interest rate swaps with certain qualified borrowers to facilitate the borrowers’ risk management strategies and concurrently entered into mirror-image derivatives with a third party counterparty.

We recognize derivative financial instruments at fair value regardless of the purpose or intent for holding the instrument. We record derivative assets and derivative liabilities on the Consolidated Statements of Financial Condition within other assets and other liabilities, respectively. Because the derivative assets and liabilities recorded on the balance sheet at June 30, 2019 do not represent the amounts that may ultimately be paid under these contracts, these assets and liabilities are listed in the table below (dollars in thousands):

	June 30, 2019
			Fair Value
	Notional		Asset		Liability
Interest rate contracts—pay fixed, receive floating	$	250,000	$	1,456	$	1,316
Other interest rate swaps—pay fixed, receive floating		286,798		7,712		8,280
Other credit derivatives		4,262		—		11

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GAAP Reconciliation and Management Explanation of Non-GAAP Financial Measures

Some of the financial measures included in our “Selected Financial Data” are not measures of financial performance in accordance with GAAP. Our management uses the non‑GAAP financial measures set forth below in its analysis of our performance:

• “Adjusted net income” and “adjusted diluted earnings per share” exclude certain significant items, which include incremental income tax benefit related to the reversal of the valuation allowance on our net deferred tax assets, incremental income tax benefit related to Illinois corporate income tax rate increases, incremental income tax expense or benefit related to federal corporate income tax reductions, impairment charges on assets held for sale, merger-related expenses, and core system conversion expenses adjusted for applicable income tax. Management believes the significant items are not indicative of or useful to measure the Company’s operating performance on an ongoing basis.

• “Adjusted non-interest expense” is non-interest expense excluding certain significant items, which include impairment charges on assets held for sale, merger-related expenses, and core system conversion expenses.

• “Adjusted efficiency ratio” is adjusted non-interest expense less amortization of intangible assets divided by net interest income and non-interest income. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Adjusted non-interest expense to average assets” is adjusted non-interest expense divided by average assets. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Adjusted return on average stockholders’ equity” is adjusted net income divided by average stockholders’ equity. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Adjusted return on average assets” is adjusted net income divided by average assets. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Non-interest income to total revenues” is non-interest income divided by net interest income plus non-interest income. Management believes that it is standard practice in the industry to present non-interest income as a percentage of total revenue. Accordingly, management believes providing these measures may be useful for peer comparison.

• “Pre‑tax pre‑provision net income” is pre‑tax income plus the provision for loan and lease losses. Management believes this metric is important due to the tax benefit resulting from the reversal of the net deferred tax asset valuation allowance, the decrease in the federal corporate income tax rate, and the increase in the Illinois state corporate income tax rate. The metric demonstrates income excluding the tax provision or benefit and excludes the provision for loan and lease losses.

• “Adjusted pre-tax pre-provision net income” is pre-tax pre-provision net income excluding certain significant items, which include impairment charges on assets held for sale, merger-related expenses, and core system conversion expenses. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Pre‑tax pre‑provision return on average assets” is pre-tax income plus the provision for loan and lease losses, divided by average assets. Management believes this metric is important due to the change in tax expense or benefit resulting from the recent decrease in the federal corporate income tax rate and the recent increase in the Illinois state income tax rate. The ratio demonstrates profitability excluding the tax provision or benefit and excludes the provision for loan and lease losses. “Adjusted pre-tax pre-provision return on average assets” excludes certain significant items, which include impairment charges on assets held for sale, merger-related expenses, and core system conversion expenses.

• “Tangible common equity” is defined as total stockholders’ equity reduced by preferred stock and goodwill and other intangible assets. Management does not consider servicing assets as an intangible asset for purposes of this calculation.

• “Tangible assets” is defined as total assets reduced by goodwill and other intangible assets. Management does not consider servicing assets as an intangible asset for purposes of this calculation.

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• “Tangible book value per common share” is calculated as tangible common equity, which is stockholders’ equity reduced by preferred stock and goodwill and other intangible assets, divided by total shares of common stock outstanding. Management believes this metric is important due to the relative changes in the book value per share exclusive of changes in intangible assets.

• “Tangible common equity to tangible assets” is calculated as tangible common equity divided by tangible assets, which is total assets reduced by goodwill and other intangible assets. Management believes this metric is important to investors and analysts interested in relative changes in the ratio of total stockholders’ equity to total assets, each exclusive of changes in intangible assets.

• “Tangible net income available to common stockholders” is net income available to common stockholders excluding after-tax intangible asset amortization.

• “Adjusted tangible net income available to common stockholders” is tangible net income available to common stockholders excluding certain significant items. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Return on average tangible common stockholders’ equity” is tangible net income available to common stockholders divided by average tangible common stockholders’ equity. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

• “Adjusted return on average tangible common stockholders’ equity” is adjusted tangible net income available to common stockholders divided by average tangible common stockholders’ equity. Management believes the metric is an important measure of the Company’s operating performance on an ongoing basis.

We believe that these non‑GAAP financial measures provide useful information to its management and investors that is supplementary to our financial condition, results of operations and cash flows computed in accordance with GAAP; however, we acknowledge that our non‑GAAP financial measures have a number of limitations. As such, you should not view these disclosures as a substitute for results determined in accordance with GAAP financial measures that we and other companies use. Management also uses these measures for peer comparison.

Reconciliations of Non-GAAP Financial Measures

	As of or For the Three Months Ended June 30,						As of or For the Six Months Ended June 30,
(dollars in thousands, except per share data)	2019			2018			2019			2018
Net income and earnings per share excluding    significant items
Reported Net Income	$	13,211		$	2,768		$	25,808		$	9,536
Significant items:
Incremental income tax benefit attributed to federal    income tax reform		—			—			—			(724	)
Impairment charges on assets held for sale		—			117			392			117
Merger-related expense		3,152			1,517			3,170			1,640
Core system conversion expense		394			9,009			1,924			9,009
Tax benefit on impairment charges and    merger-related expenses		(842	)		(2,832	)		(1,382	)		(2,866	)
Adjusted Net Income	$	15,915		$	10,579		$	29,912		$	16,712
Reported Diluted Earnings per Share	$	0.34		$	0.08		$	0.68		$	0.29
Significant items:
Incremental income tax benefit attributed to federal    income tax reform		—			—			—			(0.02	)
Impairment charges on assets held for sale		—			—			0.01			—
Merger-related expense		0.08			0.05			0.09			0.06
Core system conversion expense		0.01			0.28			0.05			0.28
Tax benefit on impairment charges and    merger-related expenses		(0.02	)		(0.09	)		(0.04	)		(0.09	)
Adjusted Diluted Earnings per Share	$	0.41		$	0.32		$	0.79		$	0.52

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	As of or For the Three Months Ended June 30,						As of or For the Six Months Ended June 30,
(dollars in thousands, except per share data)	2019			2018			2019			2018
Adjusted non-interest expense:
Non-interest expense	$	43,954		$	45,479		$	84,633		$	77,093
Less: significant items
Impairment charges on assets held for sale		—			117			392			117
Merger-related expense		3,152			1,517			3,170			1,640
Core system conversion expense		394			9,009			1,924			9,009
Adjusted non-interest expense	$	40,408		$	34,836		$	79,147		$	66,327
Adjusted non-interest expense excluding amortization of    intangible assets:
Adjusted non-interest expense	$	40,408		$	34,836		$	79,147		$	66,327
Less: Amortization of intangible assets		1,959			1,130			3,732			1,897
Adjusted non-interest expense excluding amortization of        intangible assets	$	38,449		$	33,706		$	75,415		$	64,430
Pre-tax pre-provision net income:
Pre-tax income	$	18,286		$	3,832		$	35,681		$	11,921
Add: Provision for loan and lease losses		6,391			3,956			10,390			9,071
Pre-tax pre-provision net income	$	24,677		$	7,788		$	46,071		$	20,992
Adjusted pre-tax pre-provision net income:
Pre-tax pre-provision net income	$	24,677		$	7,788		$	46,071		$	20,992
Impairment charges on assets held for sale		—			117			392			117
Merger-related expense		3,152			1,517			3,170			1,640
Core system conversion expense		394			9,009			1,924			9,009
Adjusted pre-tax pre-provision net income	$	28,223		$	18,431		$	51,557		$	31,758
Total revenues:
Net interest income	$	54,448		$	39,056		$	104,533		$	72,751
Add: non-interest income		14,183			14,211			26,171			25,334
Total revenues	$	68,631		$	53,267		$	130,704		$	98,085
Tangible common stockholders' equity:
Total stockholders' equity	$	717,675		$	616,406		$	717,675		$	616,406
Less: Preferred stock		10,438			10,438			10,438			10,438
Less: Goodwill		145,638			127,536			145,638			127,536
Less: Core deposit intangibles and other intangibles		35,908			37,139			35,908			37,139
Tangible common stockholders' equity	$	525,691		$	441,293		$	525,691		$	441,293
Tangible assets:
Total assets	$	5,391,236		$	4,805,280		$	5,391,236		$	4,805,280
Less: Goodwill		145,638			127,536			145,638			127,536
Less: Core deposit intangibles and other intangibles		35,908			37,139			35,908			37,139
Tangible assets	$	5,209,690		$	4,640,605		$	5,209,690		$	4,640,605
Average tangible common stockholders' equity:
Average total stockholders' equity	$	696,928		$	518,547		$	678,146		$	489,204
Less: Average preferred stock		10,438			10,438			10,438			10,438
Less: Average goodwill		140,073			78,619			134,158			66,657
Less: Average core deposit intangibles and other intangibles		35,163			22,998			33,962			19,726
Average tangible common stockholders' equity	$	511,254		$	406,492		$	499,588		$	392,383
Average tangible assets:
Average total assets	$	5,274,820		$	3,863,184		$	5,120,122		$	3,613,831
Less: Average goodwill		140,073			78,619			134,158			66,657
Less: Average core deposit intangibles and other intangibles		35,163			22,998			33,962			19,726
Average tangible assets	$	5,099,584		$	3,761,567		$	4,952,002		$	3,527,448
Tangible net income available to common stockholders:
Net income available to common stockholders	$	13,016		$	2,570		$	25,417		$	9,145
Add: After-tax intangible asset amortization		1,413			816			2,692			1,369
Tangible net income available to common stockholders	$	14,429		$	3,386		$	28,109		$	10,514
Adjusted Tangible net income available to common stockholders:
Tangible net income available to common stockholders	$	14,429		$	3,386		$	28,109		$	10,514
Incremental income tax benefit attributed to federal income tax        reform		—			—			—			(724	)
Impairment charges on assets held for sale		—			117			392			117
Merger-related expense		3,152			1,517			3,170			1,640
Core system conversion expense		394			9,009			1,924			9,009
Tax benefit on significant items		(842	)		(2,832	)		(1,382	)		(2,866	)
Adjusted tangible net income available to common stockholders	$	17,133		$	11,197		$	32,213		$	17,690

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	As of or For the Three Months Ended June 30,						As of or For the Six Months Ended June 30,
(dollars in thousands, except share and per share data)	2019			2018			2019			2018
Pre-tax pre-provision return on average assets:
Pre-tax pre-provision net income	$	24,677		$	7,788		$	46,071		$	20,992
Average total assets		5,274,820			3,863,184			5,120,122			3,613,831
Pre-tax pre-provision return on average assets		1.88	%		0.81	%		1.81	%		1.17	%
Adjusted pre-tax pre-provision return on average assets:
Adjusted pre-tax pre-provision net income	$	28,223		$	18,431		$	51,557		$	31,758
Average total assets		5,274,820			3,863,184			5,120,122			3,613,831
Adjusted pre-tax pre-provision return on average assets:		2.15	%		1.91	%		2.03	%		1.77	%
Non-interest income to total revenues:
Non-interest income	$	14,183		$	14,211		$	26,171		$	25,334
Total revenues		68,631			53,267			130,704			98,085
Non-interest income to total revenues		20.67	%		26.68	%		20.02	%		25.83	%
Adjusted non-interest expense to average assets:
Adjusted non-interest expense	$	40,408		$	34,836		$	79,147		$	66,327
Average total assets		5,274,820			3,863,184			5,120,122			3,613,831
Adjusted non-interest expense to average assets		3.07	%		3.62	%		3.12	%		3.70	%
Adjusted efficiency ratio:
Adjusted non-interest expense excluding amortization        of intangible assets	$	38,449		$	33,706		$	75,415		$	64,430
Total revenues		68,631			53,267			130,704			98,085
Adjusted efficiency ratio		56.02	%		63.28	%		57.70	%		65.69	%
Adjusted return on average assets:
Adjusted net income	$	15,915		$	10,579		$	29,912		$	16,712
Average total assets		5,274,820			3,863,184			5,120,122			3,613,831
Adjusted return on average assets		1.21	%		1.10	%		1.18	%		0.93	%
Adjusted return on average stockholders' equity:
Adjusted net income	$	15,915		$	10,579		$	29,912		$	16,712
Average stockholders' equity		696,928			518,547			678,146			489,204
Adjusted return on average stockholders' equity		9.16	%		8.18	%		8.90	%		6.89	%
Tangible common equity to tangible assets:
Tangible common equity	$	525,691		$	441,293		$	525,691		$	441,293
Tangible assets		5,209,690			4,640,605			5,209,690			4,640,605
Tangible common equity to tangible assets		10.09	%		9.51	%		10.09	%		9.51	%
Return on average tangible common stockholders' equity:
Tangible net income available to common stockholders	$	14,429		$	3,386		$	28,109		$	10,514
Average tangible common stockholders' equity		511,254			406,492			499,588			392,383
Return on average tangible common stockholders' equity:		11.32	%		3.34	%		11.35	%		5.40	%
Adjusted return on average tangible common stockholders' equity:
Adjusted tangible net income available to common stockholders	$	17,133		$	11,197		$	32,213		$	17,690
Average tangible common stockholders' equity		511,254			406,492			499,588			392,383
Adjusted return on average tangible common stockholders' equity		13.44	%		11.05	%		13.00	%		9.09	%
Tangible book value per share:
Tangible common equity	$	525,691		$	441,293		$	525,691		$	441,293
Common shares outstanding		38,115,219			36,218,955			38,115,219			36,218,955
Tangible book value per share	$	13.79		$	12.18		$	13.79		$	12.18

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Forward-Looking Statements

This report contains certain “forward-looking statements” within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Any statements about Byline’s expectations, beliefs, plans, strategies, predictions, forecasts, objectives or assumptions of future events or performance are not historical facts and may be forward-looking. These statements are often, but not always, made through the use of words or phrases such as “anticipates,” “believes,” “expects,” “can,” “could,” “may,” “predicts,” “potential,” “opportunity,” “should,” “will,” “estimate,” “plans,” “projects,” “continuing,” “ongoing,” “expects,” “seeks,” “intends” and similar words or phrases. Accordingly, these statements involve estimates, known and unknown risks, assumptions and uncertainties that could cause actual strategies, actions or results to differ materially from those expressed in such statements, and are not guarantees of future results or other events or performance. Because forward-looking statements are necessarily only estimates of future strategies, actions or results, based on management’s current expectations, assumptions and estimates on the date hereof, and there can be no assurance that actual strategies, actions or results will not differ materially from expectations, readers are cautioned not to place undue reliance on such statements.

Our ability to predict results or the actual effects of future plans, strategies or events is inherently uncertain. Factors which could cause actual results or conditions to differ materially from those reflected in forward-looking statements include:

• uncertainty regarding geopolitical developments and the United States and global economic outlook that may continue to impact market conditions or affect demand for certain banking products and services;

• unforeseen credit quality problems or changing economic conditions that could result in charge-offs greater than we have anticipated in our allowance for loan and lease losses or changes in the value of our investments;

• commercial real estate market conditions in the Chicago metropolitan area and southern Wisconsin;

• deterioration in the financial condition of our borrowers resulting in significant increases in our loan and lease losses and provisions for those losses and other related adverse impacts to our results of operations and financial condition;

• estimates of fair value of certain of our assets and liabilities, which could change in value significantly from period to period;

• competitive pressures in the financial services industry relating to both pricing and loan and lease structures, which may impact our growth rate;

• unanticipated developments in pending or prospective loan and/or lease transactions or greater-than-expected pay downs or payoffs of existing loans and leases;

• inaccurate assumptions in our analytical and forecasting models used to manage our loan and lease portfolio;

• unanticipated changes in monetary policies of the Federal Reserve or significant adjustments in the pace of, or market expectations for, future interest rate changes;

• availability of sufficient and cost-effective sources of liquidity or funding as and when needed;

• our ability to retain or the loss of key personnel or an inability to recruit appropriate talent cost-effectively;

• adverse effects on our information technology systems resulting from failures, human error or cyberattack, including the potential impact of disruptions or security breaches at our third-party service providers, any of which could result in an information or security breach, the disclosure or misuse of confidential or proprietary information, significant legal and financial losses and reputational harm;

• greater-than-anticipated costs to support the growth of our business, including investments in technology, process improvements or other infrastructure enhancements, or greater-than-anticipated compliance or regulatory costs and burdens;

• the impact of possible future acquisitions, if any, including the costs and burdens of integration efforts;

• the ability of the Company to receive dividends from its subsidiaries;

• changes in Small Business Administration (“SBA”) and U.S. Department of Agriculture (“USDA”) U.S. government guaranteed lending rules, regulations and loan products, including specifically the SBA Section 7(a) program, changes in SBA or USDA standard operating procedures or changes to the status of Byline Bank as an SBA Preferred Lender;

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• changes in accounting principles, policies and guidelines applicable to bank holding companies and banking generally;

• the impact of a possible change in the federal or state income tax rate on our deferred tax assets and provision for income tax expense;

• the possibility that any of the anticipated benefits of acquisitions will not be realized or will not be realized within the expected time period;

• the risk that the integration of acquisition operations will be materially delayed or will be more costly or difficult than expected;

• the effect of mergers on customer relationships and operating results; and

• other risks detailed from time to time in filings we make with the SEC.

These risks and uncertainties should be considered in evaluating any forward-looking statements, and undue reliance should not be placed on such statements. Forward looking statements speak only as of the date they are made. You should also consider the risks, assumptions and uncertainties set forth in the “Risk Factors” section of this Form 10-Q and in our Annual Report on Form 10-K for the year ended December 31, 2018, and the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” section of this Form 10-Q, as well as those set forth in the reports we file with the SEC. We assume no obligation to update any of these statements in light of new information, future events or otherwise unless required under the federal securities laws.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Our primary market risk is interest rate risk, which is defined as the risk of loss of net interest income or net interest margin because of changes in interest rates.

We seek to measure and manage the potential impact of interest rate risk. Interest rate risk occurs when interest-earning assets and interest-bearing liabilities mature or re-price at different times, on a different basis or in unequal amounts. Interest rate risk also arises when our assets, liabilities and off-balance sheet contracts each respond differently to changes in interest rates, including as a result of explicit and implicit provisions in agreements related to such assets and liabilities and in off-balance sheet contracts that alter the applicable interest rate and cash flow characteristics as interest rates change. The two primary examples of such provisions that we are exposed to are the duration and rate sensitivity associated with indeterminate-maturity deposits (e.g., non-interest-bearing checking accounts, negotiable order of withdrawal accounts, savings accounts and money market deposits accounts and the rate of prepayment associated with fixed-rate lending and mortgage-backed securities. Interest rates may also affect loan demand, credit losses, mortgage origination volume and other items affecting earnings.

We are also exposed to interest rate risk through the retained portion of the U.S. government guaranteed loans we make and the related servicing rights. Our U.S. government guaranteed loan portfolio is comprised primarily of SBA 7(a) loans, virtually all of which are quarterly or monthly adjustable with the prime rate. The SBA portfolio reacts differently in a rising rate environment than our other non-guaranteed portfolios. Generally, when interest rates rise, the prepayments in the SBA portfolio tend to increase.

Our management of interest rate risk is overseen by our bank’s asset liability committee, and is chaired by Byline Bank’s Treasurer, based on a risk management infrastructure approved by our board of directors that outlines reporting and measurement requirements. In particular, this infrastructure sets limits and management targets, calculated monthly, for various metrics, including our economic value sensitivity, our economic value of equity and net interest income simulations involving parallel shifts in interest rate curves, steepening and flattening yield curves, and various prepayment and deposit duration assumptions. Our risk management infrastructure also requires a periodic review of all key assumptions used, such as identifying appropriate interest rate scenarios, setting loan prepayment rates based on historical analysis, non-interest-bearing and interest-bearing demand deposit durations based on historical analysis and the targeted investment term of capital.

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We manage the interest rate risk associated with our interest-bearing liabilities by managing the interest rates and tenors associated with our borrowings from the FHLB and deposits from our customers that we rely on for funding. In particular, from time to time we use special offers on deposits to alter the interest rates and tenors associated with our interest-bearing liabilities. We manage the interest rate risk associated with our interest-earning assets by managing the interest rates and tenors associated with our investment and loan portfolios, from time to time purchasing and selling investment securities and selling residential mortgage loans in the secondary market.

We utilize interest rate swaps to hedge our interest rate exposure on commercial loans when it meets our clients’ and Byline Bank’s needs. Typically, customer interest rate swaps are for terms of more than five years. As of June 30, 2019, we had a notional amount of $536.8 million of interest rate swaps outstanding which includes customer swaps and those on Byline Bank’s balance sheet. The overall effectiveness of our hedging strategies is subject to market conditions, the quality of our execution, the accuracy of our valuation assumptions, the associated counterparty credit risk and changes in interest rates.

We do not engage in speculative trading activities relating to interest rates, foreign exchange rates, commodity prices, equities or credit.

We are also subject to credit risk. Credit risk is the risk that borrowers or counterparties will be unable or unwilling to repay their obligations in accordance with the underlying contractual terms. We manage and control credit risk in the loan and lease portfolio by adhering to well-defined underwriting criteria and account administration standards established by management. Written credit policies document underwriting standards, approval levels, exposure limits and other limits or standards deemed necessary and prudent. Portfolio diversification at the obligor, industry, product and/or geographic location levels is actively managed to mitigate concentration risk. In addition, credit risk management also includes an independent credit review process that assesses compliance with commercial, real estate and other credit policies, risk ratings, and other critical credit information. In addition to implementing risk management practices that are based upon established and sound lending practices, we adhere to sound credit principles. We understand and evaluate our customers’ borrowing needs and capacity to repay, in conjunction with their character and history.

Evaluation of Interest Rate Risk

We use a net interest income simulation model to measure and evaluate potential changes in our net interest income. We run various hypothetical interest rate scenarios at least monthly and compare these results against a scenario with no changes in interest rates. Our net interest income simulation model incorporates various assumptions, which we believe are reasonable but which may have a significant impact on results such as: (1) the timing of changes in interest rates, (2) shifts or rotations in the yield curve, (3) re-pricing characteristics for market-rate-sensitive instruments on and off balance sheet, (4) differing sensitivities of financial instruments due to differing underlying rate indices, (5) the effect of interest rate limitations in our assets, such as floors and caps, (6) the effect of our interest rate swaps and (7) overall growth and repayment rates and product mix of assets and liabilities. Because of limitations inherent in any approach used to measure interest rate risk, simulation results are not intended as a forecast of the actual effect of a change in market interest rates on our results but rather as a means to better plan and execute appropriate asset-liability management strategies and manage our interest rate risk.

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Potential changes to our net interest income in hypothetical rising and declining rate scenarios calculated as of June 30, 2019 is presented in the following table. The projections assume (1) immediate, parallel shifts downward of the yield curve of 100 basis points and immediate, parallel shifts upward of the yield curve of 100, 200, 300 and 400 basis points and (2) gradual shifts downward of 100 and 200 basis points over 12 months and gradual shifts upward of 100 and 200 basis points over 12 months. In the current interest rate environment, a downward shift of the yield curve of 300 and 400 basis points does not provide us with meaningful results. In a downward parallel shift of the yield curve, interest rates at the short-end of the yield curve are not modeled to decline any further than 0%. For the dynamic balance sheet and rate shift scenarios, we assume interest rates follow a forward yield curve and then ramp it up by 1/12th of the total change in rates each month for twelve months.

	Estimated Increase (Decrease) in Net Interest Income
	Twelve Months Ending			Twelve Months Ending
Change in Market Interest Rates as of June 30, 2019	June 30, 2020			June 30, 2021
Immediate Shifts
+400 basis points		21.5	%		23.0	%
+300 basis points		16.5	%		17.8	%
+200 basis points		11.2	%		12.4	%
+100 basis points		5.6	%		6.5	%
-100 basis points		(6.3	)%		(7.1	)%
-200 basis points		(14.8	)%		(11.3	)%
Dynamic Balance Sheet and Rate Shifts
+200 basis points		8.2	%
+100 basis points		4.9	%
-100 basis points		(1.8	)%
-200 basis points		(6.5	)%

The results of this simulation analysis are hypothetical, and a variety of factors might cause actual results to differ substantially from what is depicted. For example, if the timing and magnitude of interest rate changes differ from those projected, our net interest income might vary significantly. Non-parallel yield curve shifts such as a flattening or steepening of the yield curve or changes in interest rate spreads, would also cause our net interest income to be different from that depicted. An increasing interest rate environment could reduce projected net interest income if deposits and other short-term liabilities re-price faster than expected or faster than our assets re-price. Actual results could differ from those projected if we grow assets and liabilities faster or slower than estimated, if we experience a net outflow of deposit liabilities or if our mix of assets and liabilities otherwise changes. Actual results could also differ from those projected if we experience substantially different repayment speeds in our loan portfolio than those assumed in the simulation model. Finally, these simulation results do not contemplate all the actions that we may undertake in response to potential or actual changes in interest rates, such as changes to our loan, investment, deposit, funding or hedging strategies.

On July 31, 2019, the Federal Reserve Bank announced a reduction its benchmark interest rate of 25 basis points. Following the announcement, the Company reduced the Prime Rate from 5.50% to 5.25% on its variable rate loans effective on August 1, 2019. The Company estimates the reduction will decrease net interest income by approximately $948,000 over the remainder of 2019.

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Item 4. Controls and Procedures.

The Company’s management, including our President and Chief Executive Officer and our Chief Financial Officer, have evaluated the effectiveness of our “disclosure controls and procedures” (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”)), as of the end of the period covered by this report. Based on such evaluation, our President and Chief Executive Officer and our Chief Financial Officer have concluded that, as of June 30, 2019, the Company’s disclosure controls and procedures were effective to provide reasonable assurance that the information required to be disclosed by the Company in the reports it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and is accumulated and communicated to the Company’s management, including our President and Chief Executive Officer and our Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There was no change in our internal control over financial reporting during the quarter ended June 30, 2019, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

The design of any system of controls and procedures is based in part upon certain assumptions about the likelihood of future events. There can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote.

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PART II-OTHER INFORMATION

Item 1. Legal Proceedings.

We operate in a highly regulated environment. From time to time we are a party to various litigation matters incidental to the conduct of our business. We are not presently party to any legal proceedings the resolution of which we believe would have a material adverse effect on our business, prospects, financial condition, liquidity, results of operation, cash flows or capital levels.

Item 1A. Risk Factors.

There have been no material changes to the risk factors previously disclosed in the “Risk Factors” section included in our Form 10-K for our fiscal year ended December 31, 2018 that was filed with the SEC on March 15, 2019.

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

Unregistered Sales of Equity Securities

None.

Use of Proceeds from Registered Securities

None.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

(a) Employment Agreement with Lindsay Corby

On August 7, 2019, Byline Bancorp, Inc. and Byline Bank (collectively, the “Company”) entered into an employment agreement with Ms. Lindsay Corby, Executive Vice President and Chief Financial Officer of the Company. Ms. Corby’s agreement is for an initial term of three years, and includes an automatic one year extension at the end of each term following the initial term unless notice of termination is provided not less than 120 days prior to the end of such term. During the term of the agreement, Ms. Corby serves as Executive Vice President and Chief Financial Officer, reporting to the Company’s Chief Executive Officer. Ms. Corby’s employment agreement provides for an annual base salary of $330,000 (which may be increased but not decreased), participation in the Company’s Executive Incentive Plan, with an annual target cash bonus of 40% of her annual base salary (or such other percentage as the Board may determine), and participation in Byline’s long term incentive programs, including the Byline Bancorp, Inc. 2017 Omnibus Incentive Compensation Plan.

Ms. Corby’s employment agreement also includes severance benefits that are subject to signing a release. If the Company terminates Ms. Corby without “cause” (and not due to disability) or Ms. Corby resigns for “good reason”, she will be entitled to: (1) one times the sum of (A) her then current annual base salary; and (B) the excess of the applicable COBRA premiums for health, dental and vision benefits on the date of termination (provided that she elects COBRA continuation coverage) over the amount of health, dental and vision premiums charged to active employees of Byline for like coverage on the date of termination (the “COBRA Amounts”), payable in cash in installments over 12 months following termination of employment, and (2) a pro rata bonus for the year of termination based on actual performance and paid following the end of the fiscal year. In the event Ms. Corby is terminated without “cause” (and not due to disability) or she voluntarily resigns for “good reason” within one year following a “change in control” (as defined in the agreement), she will be entitled to each of the severance payments described above except that she will be entitled to two times the sum of (X) her then current annual

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base salary plus (Y) the higher of the two immediately preceding completed fiscal years’ earned bonus plus (Z) the COBRA Amounts, payable in a lump sum following termination of employment.

“Cause” generally means: (1) a willful and continued failure to perform substantially one’s duties; (2) willfully engaging in illegal conduct, an act of dishonesty or gross misconduct related to the performance of one’s duties and responsibilities; (3) being charged with a crime involving moral turpitude, dishonesty, fraud, theft or financial impropriety; (4) willful violation of a material requirement of any applicable code of ethics or standards of conduct of the Company, or violation of a fiduciary duty to the Company; or (5) a breach of the Company’s Agreement Protecting Company Interests.

“Good reason” generally means: (1) any material reduction in base salary; (2) any material adverse change in title, position, authority or reporting relationships; or (3) the requirement to relocate the principal place of employment to a location in excess of 50 miles from the principal work location on the date of the employment agreement.

Ms. Corby’s employment agreement also provides that in the event her employment terminates due to death or Disability (as such term is defined in the agreement), Ms. Corby or her estate would be entitled to receive, in addition to any accrued but unpaid compensation or benefits, any unpaid bonus earned with respect to any fiscal year ending on or preceding the date of termination and a pro rata portion of her bonus for the fiscal year in which the termination occurs, payable at the time that such bonuses are paid to other senior executives for such year.  In addition,  in the event of her death, Ms. Corby’s beneficiary would be entitled to a lump sum cash amount equal to 200% of her base salary but not exceeding $750,000, which benefit may be provided through the purchase of a life insurance policy.

As a condition to her employment agreement, Ms. Corby previously entered into an Agreement Protecting Company Interests with the Company, which contains (1) a confidentiality provision regarding the use and disclosure of confidential information during the term of employment and after, (2) a customer and employee non-solicit during employment for 12 months following termination of employment, and (3) assignment of inventions and non-disparagement provisions.

The foregoing description of Ms. Corby’s employment agreement is a summary only, and accordingly, does not purport to be complete and is qualified in its entirety by the terms and conditions of the agreement, a copy of which is filed as an exhibit to this report and is incorporated herein by reference.

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Item 6. Exhibits.

	EXHIBIT
Number	Description
3.1	Amended and Restated Certificate of Incorporation (filed as Exhibit 3.1 to the Company’s Registration Statement on Form S-1, as amended (File No. 333-218362) filed on June 19, 2017 and incorporated herein by reference)
3.2	Amended and Restated Bylaws (filed as Exhibit 3.2 to the Company’s Registration Statement on Form S-1, as amended (File No. 333-218362) filed on June 19, 2017 and incorporated herein by reference)
3.3	Certificate of Designations of Noncumulative Perpetual Preferred Stock, Series A (filed as Exhibit 3.3 to the Company’s Registration Statement on Form S-1, as amended (File No. 333-218362) filed on June 19, 2017 and incorporated herein by reference)
3.4	Form of Repurchase Agreement for Noncumulative Perpetual Preferred Stock, Series A (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K (File No. 001-38139) filed on July 17, 2017 and incorporated herein by reference)
3.5	Certificate of Elimination of Noncumulative Perpetual Preferred Stock, Series A (filed as Exhibit 3.5 to the Company’s Quarterly Report on Form 10-Q (file No. 001-38139) filed on August 13, 2018 and incorporated herein by reference)
3.6	Certificate of Designations of 7.50% Fixed-to-Floating Noncumulative Perpetual Preferred Stock, Series B (filed as Exhibit 3.4 to the Company’s Registration Statement on Form S-1, as amended (File No. 333-218362) filed on June 19, 2017 and incorporated herein by reference)
4.1	Certain instruments defining the rights of holders of long-term debt securities of the registrant and its subsidiaries are omitted pursuant to Item 601(b)(4)(iii) of Regulation S-K. The registrant hereby undertakes to furnish to the SEC, upon request, copies of any such instruments.
10.1	Employment Agreement with Lindsay Corby†
31.1	Certification of the Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, and Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of the Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, and Section 302 of the Sarbanes-Oxley Act of 2002
32.1(a)	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	Financial information from the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2019, formatted in XBRL interactive data files pursuant to Rule 405 of Regulation S-T: (i) Consolidated Statements of Condition; (ii) Consolidated Statements of Operations; (iii) Consolidated Statements of Comprehensive Income (Loss); (iv) Consolidated Statements of Changes in Stockholders’ Equity; (v) Consolidated Statements of Cash Flows; and (vi) Notes to Consolidated Financial Statements

(a) This exhibit shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act.

† Indicates a management contract or compensatory plan.

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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.

	Byline Bancorp, Inc.
Date:  August 7, 2019	By:	/s/	Alberto J. Paracchini
			Alberto J. Paracchini
			President and Chief Executive Officer
			(Principal Executive Officer)
Date:  August 7, 2019	By:	/s/	Lindsay Corby
			Lindsay Corby
			Executive Vice President and Chief Financial Officer
			(Principal Financial and Accounting Officer)

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EX-10.1

EXHIBIT 10.1

Lindsay Corby

Re: Employment Terms

Dear Lindsay:

On behalf of the Board of Directors of each of Byline Bancorp, Inc., a Delaware corporation (the “Holding Company”), and Byline Bank, an Illinois chartered bank (the “Company”), (the “Holding Company Board” and the “Board”, respectively), I am pleased to confirm your continued employment on the terms set forth in this letter (this “Agreement”). In this Agreement, references to your employment by the Company or your duties or obligations to the Company shall include your employment by and duties and obligations to the Holding Company, and references in this Agreement to the Company’s obligations to provide compensation or make payments to you shall include obligations of the Holding Company to pay or provide, or to cause the Company to pay or provide, in either case without duplication, such compensation or payments to you.  In addition, references to the Board shall include the Holding Company Board.

1.Term.  The term of this Agreement commences upon your written acceptance below and will expire on the third anniversary of your acceptance date; provided, the term will automatically renew on such date for one (1) year, and for one (1) year on each subsequent anniversary of such date thereafter, unless at any time not less than one hundred twenty (120) days prior to the end of such term either the Company or you notify the other in writing of the intention not to further extend the term; provided further, (a) the term of this Agreement shall terminate on any termination of your employment and (b) upon the occurrence of a Change in Control (as defined on the Attachment) the term of this Agreement shall renew for the period expiring on the first anniversary of such Change in Control and shall not automatically renew thereafter.  The period under this Section 1, as may be so renewed, is referred to herein as the “Term”.  Absent a written agreement by the parties to the contrary, upon the expiration of the Term, this Agreement (all rights and obligations herein) will terminate (except for those provisions that specifically survive) and your employment will continue thereafter at-will.

2.Position; Principal Place of Employment.  You will be employed as Executive Vice President and Chief Financial Officer of the Holding Company and the Company, reporting to the Chief Executive Officer.  Your principal place of employment will be at the Company’s corporate offices designated from time to time by the Chief Executive Officer. Your duties shall be as may be prescribed by the Company’s by-laws and as may be assigned by the Chief Executive Officer from time to time commensurate with your position.  During your employment, you owe an undivided duty of loyalty to the Company and agree to devote your full business time and attention to the performance of your duties and responsibilities.  You shall perform your duties under this Agreement professionally, in accordance with the applicable laws, rules and regulations and such standards, policies and procedures established by the Company and the banking industry from time to time.  You will not work full-time for another employer, and all part-time employment, including any self-employment shall be disclosed to the Company not less frequently than on the anniversary of the date of this Agreement. You may serve on charitable boards or committees at your discretion without consent of the Board and, in addition, on such corporate boards as are approved by the Board in its sole discretion, so long as such activities do not interfere materially with performance of your responsibilities hereunder. In addition, you are subject to the Company’s codes of ethics or similar policies which you are advised are applicable to you and all such other activities are

\\

Lindsay Corby
Page 2

subject to the principles thereunder not to engage in any activity that may, in the sole discretion of the Board, be determined to be a conflict of interest. To the extent requested by the Board or Chief Executive Officer, you agree to serve without additional compensation as an officer and/or director of any of the Company’s subsidiaries.

3.Base Salary.  You will be paid a base salary at an annual rate of $330,000 (the “Base Salary”), subject to applicable withholdings and payable in accordance with the regular payroll practices of the Company. The amount of the Base Salary may be increased, but not decreased from time to time in accordance with the amounts of salary approved by the Board or a committee thereof (without limiting the applicability of Section 7(c) pursuant to a voluntary termination for Good Reason).  In order to effectuate the purpose of the preceding sentence, the amount of the Base Salary shall be reviewed by such committee or Board at least every year during the term of this Agreement.

4.Annual Incentive.  You will be eligible to participate in the Company’s Executive Incentive Plan (the “EIP”) as in effect from time to time.  Under the EIP, you will have the opportunity to earn an annual target cash bonus of 40% of your Base Salary (or such other percentage as the Board or a committee thereof may establish from time to time), in accordance with the terms thereof, based upon your achievement of applicable performance objectives as determined in the sole discretion of the Board (or a committee thereof).  Your annual bonus, to the extent earned under the EIP, will be paid not later than March 31 of the fiscal year following the fiscal year of performance.  You will not be entitled to a bonus for any particular year unless you are employed on the date such bonus is paid (unless otherwise provided herein or in the EIP).

5.Long-Term Incentive Program.  You have received equity awards under the Byline Bancorp Equity Incentive Plan and 2017 Omnibus Incentive Compensation Plan (the “2017 Plan”) adopted by the Holding Company and will continue to be eligible to receive awards under the 2017 Plan, in each case on such terms and conditions as are set forth in the award agreement applicable thereto.

6.Employee Benefits; Vacation; Expenses.

(a)You will be entitled to participate in all employee benefit plans that the Company has adopted or may adopt, maintain or contribute to for the benefit of its employees, subject to satisfying the applicable eligibility requirements.  Unless otherwise provided in this Agreement, all benefits are subject to the terms and conditions of the plan or arrangement under which such benefits accrue, as may be amended or terminated at any time and from time to time in the sole discretion of the Company.

(b)You will be entitled to annual paid time off in accordance with the Company’s policy applicable to senior executives, but in no event less than four (4) weeks per calendar year (prorated for any partial calendar year of employment).

(c)You will be entitled to a benefit at Company expense that pays upon your death a lump sum cash amount equal to 200% of your Base Salary but not exceeding $750,000.  The Company may provide this benefit, in its sole discretion, through its purchase of a life insurance policy, in which event you will fully cooperate with any physical examination and other underwriting requirements to obtain such life insurance.  The Company will deduct any applicable tax withholdings from other compensation due you or from the proceeds of such benefit, as may apply.

(d)During the Term, the Company shall pay or reimburse you for the monthly dues (but not any capital assessments) of membership in a social or business club (e.g., the Economic Club of Chicago) selected at your reasonable discretion.

Lindsay Corby
Page 3

(e)Upon presentation of appropriate documentation, you will be reimbursed in accordance with the Company’s expense reimbursement policy for all reasonable and necessary business expenses (including your cell phone expenses) incurred in connection with the performance of your duties hereunder.

(f)The Company shall reimburse you for reasonable professional fees (attorneys, accountants, tax advisers) incurred by you in the preparation, negotiation and execution of this Agreement (and other agreements referenced herein) in an amount not to exceed $10,000.

7.Termination; Change in Control.  Your employment may be terminated by the Company or you for any reason at any time pursuant to written notice, and will terminate automatically on your death; provided, you shall give the Company not less than 30 days’ prior written notice of any termination by you, with or without Good Reason (as defined on the Attachment hereto (the “Attachment”)).  Any payments made and benefits provided to you under this Agreement will be in lieu of any termination or severance payments or benefits for which you (or your estate in the event of your death) otherwise may be eligible under any of the plans, practices, policies or programs of the Company or its affiliates.  If termination occurs at a time when the Company is deemed to be in troubled condition by the Federal Deposit Insurance Corporation (the “FDIC”) and is subject to the FDIC’s golden parachute regulations under 12 C.F.R. Part 359, the payments referenced in this Section 7 shall be subject to prior regulatory approval and shall be limited to an aggregate amount equal to the lesser of (i) 12 months of Base Salary, or (ii) the amount otherwise owed to you hereunder.  Any payment made pursuant to this Section 7 which is subject to the FDIC’s golden parachute regulations shall be subject to a right of the Company (or its successor) to recoup such payment from you if the Company (or its successor) subsequently determines, in its reasonable discretion, that you have engaged in any of the activities or offenses set forth in 12 C.F.R. Section 359.4(a)(i) - (iv).  After receipt of written notice from the Company that it has made a determination as provided for in this Section 7, you agree to reimburse the Company for the subject payment made pursuant to this Section 7 within 30 days after receipt of such written notice. Further, you agree to indemnify the Company for any costs incurred by the Company in recouping such amount in the event that you fail to reimburse such amount within 30 days of receiving the Company written notice under this Section 7.

(a)Death; Disability.  In the event that your employment terminates due to your death or Disability (as defined on the Attachment), you will be entitled to:  (i) any unpaid Base Salary, and any unused paid time off, accrued through the date of termination, payable as promptly as practicable after your employment terminates; (ii) reimbursement of any unreimbursed expenses incurred through the date of termination in accordance with Section 6(e), payable as promptly as practicable after your employment terminates; and (iii) all other payments or benefits to which you may be entitled under the terms of any applicable employee benefit plans and programs in which you participated immediately prior to such termination (clauses (i), (ii) and (iii) collectively being the “Accrued Amounts”).  On such termination, you will also be entitled to (iv) any unpaid EIP bonus earned with respect to any fiscal year ending on or preceding the date of termination (“Unpaid EIP”); and (v) a pro rata portion of your EIP bonus for the fiscal year in which your termination occurs, payable at the time that EIP bonuses are paid to other senior executives for such year, in an amount equal to (x) the amount that you would have earned based upon actual performance had your employment continued through the end of the fiscal year multiplied by (y) a fraction the numerator of which is the number of days you were employed during the fiscal year and the denominator of which is 365 (“Pro Rata Bonus”).  In the event of your death, your beneficiary will also be entitled to your death benefit under Section 6(c).

Lindsay Corby
Page 4

(b)Termination For Cause or Without Good Reason.  If your employment should be terminated by the Company for Cause (as defined on the Attachment) or by you without Good Reason, you will be entitled to only the Accrued Amounts.

(c)Termination Without Cause or For Good Reason; Change in Control.

(i)If your employment is terminated by the Company without Cause (and not due to Disability) or by you for Good Reason at any time during the Term (and not upon the expiration of the Term) other than on or following the occurrence of a Change in Control, the Company will pay or provide you:  (A) the Accrued Amounts and any Unpaid EIP; (B) a Pro Rata Bonus; and (C) a cash amount equal to the product of (x) one (1.0) multiplied by (y) the sum of (I) your Base Salary plus (II) the excess of the applicable COBRA premium for health, dental and vision care benefits on the date of termination (provided that you elect COBRA continuation coverage) over the amount of health, dental and vision care premiums charged to active employees of the Company for like coverage on the date of termination, which amount under this clause (C) will be payable in substantially equal installments in accordance with the Company’s regular payroll cycle over a period of twelve (12) months from your date of termination commencing on the first complete payroll payment date following the date that the Release (defined below) becomes effective; provided, that the Company’s obligation to pay the amount in subclause (II) will immediately cease to the extent required to avoid adverse tax consequences to the Company.  The amount payable under clause (C), above, will not be reduced or terminated due to compensation you may receive from any subsequent employment or self-employment.

(ii)If your employment is terminated by the Company without Cause (and not due to Disability) or by you for Good Reason at any time during the Term (and not upon the expiration of the Term), and on or within one (1) year following the occurrence of a Change in Control, the Company (or its successor) will pay or provide you:  (A) the Accrued Amounts and any Unpaid EIP; (B) a Pro Rata Bonus; and (C) a cash amount equal to the product of (x) two (2.0) multiplied by (y) the sum of (I) your Base Salary plus (II) the higher of the two immediately preceding completed fiscal years’ earned bonuses (irrespective of whether the later of the preceding years’ bonus had yet been paid) plus (III) the excess of the applicable COBRA premium for health, dental and vision care benefits on the date of termination (provided that you elect COBRA continuation coverage) over the amount of health, dental and vision care premiums charged to active employees of the Company for like coverage on the date of termination, which amount under this clause (C) will be payable in a lump sum within fifteen (15) days after the Release becomes effective; provided, that the Company will not be obligated to pay the amount in subclause (III) to the extent required to avoid adverse tax consequences to the Company.

(iii)Conditions.  Any payments or benefits made or provided pursuant to Section 7(c)(i) or (ii), as the case may be, other than Accrued Amounts, are subject to your (A) compliance with the Agreement Protecting Company Interests (as provided at Section 8 hereof); (B) delivery to the Company of an executed general release of claims in a form substantially identical to the form of release attached hereto as Exhibit A (“Release”) within forty-five (45) days of presentation thereof by the Company to you; and (C) if such payments are due in connection with a termination of your employment, delivery to the Company of a resignation from all offices, directorships and fiduciary positions with the Company, its affiliates and employee benefit plans.  Anything in this Section 7(c) to the contrary notwithstanding, to the extent that any payment conditioned upon such effective Release is deferred compensation under Section 409A (defined below) and the period during which you have discretion to execute or revoke the Release straddles two calendar years, then the Company will make or commence, as

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may apply, such payments on the earliest practicable date in such second year after the Release becomes effective.

(iv)Except as provided herein, you will not be obligated to mitigate amounts payable or arrangements made under the provisions of this Agreement and the obtaining of other employment shall in no event effect any reduction of the Company’s obligations under this Agreement. Except as provided herein, the Company’s obligation to make payments provided for in this Agreement and otherwise to perform its obligations hereunder shall not be affected by any set-off, counterclaim, recoupment, defense or other claim, right or action which the Company may have against you or others.

(d)Long Term Incentive Awards.  The terms of the applicable award agreement shall govern the treatment of your awards under the Holding Company’s long-term incentive plans upon a termination of your employment.

8.Agreement Protecting Company Interests.  As a condition of the Company entering into this Agreement and your continuing employment hereunder, you have or will enter into the Company’s and Holding Company’s standard form of Agreement Protecting Company Interests, with a “Restriction Period” thereunder of twelve (12) months.  The Agreement Protecting Company Interests and the covenants thereunder will survive any expiration of this Agreement or termination of your employment.

9.Possible Reduction to Avoid Excise Tax on Golden Parachute Payments.  In the event that any amounts payable pursuant to Section 7 hereof or other payments or benefits otherwise payable to you under this Agreement or under any other agreement, plan or program or otherwise payable to you by the Company or an affiliate thereof (a) constitute “parachute payments” within the meaning of Section 280G of the Internal Revenue Code of 1986, as amended (“Code”), and (b) but for this Section 9 would be subject to the excise tax imposed by Section 4999 of the Code, then such amounts payable under this Agreement and under such other plans, programs and agreements shall be either (i) delivered in full, or (ii) delivered in such lesser amount that would result in no portion of such payments and benefits being subject to excise tax under Section 4999 of the Code, whichever of the foregoing amounts under clause (i) or clause (ii), taking into account the applicable federal, state and local income and employment taxes and the excise tax imposed by Section 4999 of the Code (and any equivalent state or local excise taxes), results in the receipt by you, on an after-tax basis, of the greatest amount of payments and benefits, notwithstanding that all or some portion of such benefits may be taxable under Section 4999 of the Code.  Any reduction in payments or benefits required by this Section 9 shall occur in the following order:  (1) any long-term cash incentive payments due to you upon the occurrence of the event triggering such parachute payments, (2) cash severance pay, (3) any Pro Rata Bonus, and (4) reduction of vesting acceleration of equity awards (in reverse order of the date of the grant). All determinations required to be made under this Section 9 shall be made by the Company’s independent tax preparer or, if the Company in its sole discretion determines not to use such tax preparer, such other nationally or regionally recognized certified public accounting firm selected by the Company and reasonably acceptable to you (the “Firm”).  All fees and expenses of the Firm shall be borne by the Company.

10.Standard Regulatory Provisions.

(a)If you are prohibited from participating in the conduct of the Company’s affairs by a notice served under Section 8(e)(3) or 8(g)(1) of the Federal Deposit Insurance Act, (12 U.S.C. §1818(e)(3) or (g)(1)), the Company’s obligations under this contract shall be suspended as of the date of such service, unless stayed by appropriate proceedings.

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(b)If you are removed and/or permanently prohibited from participating in the conduct of the Company’s affairs by an order issued under Section 8(e)(4) or 8(g)(1) of the Federal Deposit Insurance Act, (12 U.S.C. §1818(e)(4) or (g)(1)), all obligations of the Company under this Agreement shall terminate as of the effective date of such order.

(c)If the Company is in default (as defined in Section 3(x)(1) of the Federal Deposit Insurance Act, 12 U.S.C. §1813(x)(1)), all obligations of the Company under this Agreement shall terminate as of the date of default.

(d)All obligations under this Agreement may be terminated except to the extent determined that the continuation of the Agreement is necessary for the continued operation of the Company:  (i) by the FDIC, at the time the FDIC enters into an agreement to provide assistance to or on behalf of the Company under the authority contained in Section 13(c) of the Federal Deposit Insurance Act (12 U.S.C. §1823(c)); or (ii) by the FDIC at the time the FDIC approves a supervisory merger to resolve problems related to operation of the Company or when the Company is determined to be in an unsafe and unsound condition.  All obligations of the Company under this Agreement shall terminate as of the effective date of any of the foregoing FDIC actions.

(e)Any payments made to you pursuant to this Agreement, or otherwise, are subject to and conditioned upon compliance with 12 U.S.C. §1828(k) and FDIC Regulation 12 CFR Part 359, regarding “golden parachute payments” and “prohibited indemnification payments”.

11.Arbitration.  To the fullest extent permitted by law, all claims that you may have against Company (or any other released party under the Release), or which the Company may have against you, in any way related to the subject matter, interpretation, application, or alleged breach of this Agreement (“Arbitrable Claims”) shall be resolved by binding arbitration in Chicago, Illinois.  The Arbitration will be held pursuant to the American Arbitration Association’s Commercial Rules and Mediation Procedures (other than for large or complex disputes).  The decision of the arbitrator shall be in writing and shall include a statement of the essential conclusions and findings upon which the decision is based.  Arbitration shall be final and binding upon the parties and shall be the exclusive remedy for all Arbitrable Claims.  Either party may bring an action in a court situated in Cook County, Illinois to compel arbitration under this Agreement and to enforce an arbitration award.  Otherwise, neither party shall initiate or prosecute any lawsuit or administrative action in any way related to any Arbitrable Claim.  Notwithstanding the foregoing, either party may, in the event of an actual or threatened breach of this Agreement (including but not limited to the provisions of the Agreement to Protect Company Interests), seek a temporary restraining order or injunction in a court situated in Cook County, Illinois restraining such breach pending a determination on the merits by the arbitrator.  THE PARTIES HEREBY WAIVE ANY RIGHTS THEY MAY HAVE TO TRIAL BY JURY IN REGARD TO ARBITRABLE CLAIMS, INCLUDING WITHOUT LIMITATION ANY RIGHT TO TRIAL BY JURY AS TO THE MAKING, EXISTENCE, VALIDITY, OR ENFORCEABILITY OF THE AGREEMENT TO ARBITRATE.

12.Indemnification; Liability Insurance.  Each of the Holding Company and the Company agrees to indemnify you and hold you harmless to the maximum extent permitted by the Holding Company’s and Company’s charter and by-laws (as in effect on the date hereof and without regard for any adverse amendment or repeal hereafter that is not applicable to members of the Holding Company Board or the Board, as applicable).  During the Term and at all times thereafter during which you may be subject to a liability to be indemnified under the preceding sentence, each of the Holding Company and the Company will cover you as an insured under any directors and officers liability insurance that insures its officers.  This Section 12 will survive any termination or expiration of this Agreement or termination of your employment.

Lindsay Corby
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13.Your Representations.You represent and warrant that your entering into this Agreement and your employment with the Company will not be in breach of any agreement with any current or former employer and that you are not subject to any other restrictions on solicitation of clients or customers or competing against another entity.  You understand that the Company has relied on this representation in entering into this Agreement.

14.Clawback.  In addition to any compensation recovery (clawback) which may be required by law and regulation, you acknowledge and agree that any compensation paid or awarded to you in connection with your employment with the Company shall be subject to any clawback requirements as set forth in the Company’s corporate governance guidelines or policies and to any similar or successor provisions as may be in effect from time to time; provided, that such requirements shall not be applied in a manner that discriminates against you unless otherwise required by law or regulation.  This Section 14 will survive any termination or expiration of this Agreement or termination of your employment.

15.Code Section 409A.  This Section 15 controls over anything in this Agreement to the contrary.  It is intended that any amounts payable under this Agreement shall either be exempt from or comply with Section 409A of the Code and all regulations, guidance and other interpretive authority issued thereunder (collectively, “Section 409A”) so as not to subject you to payment of any additional tax, penalty or interest imposed under Section 409A and this Agreement shall be interpreted accordingly.  To the extent necessary to comply with Section 409A, references in this Agreement to “termination of employment” or “terminates employment” (and similar references) shall have the same meaning as “separation from service” under Section 409A(a)(2)(A)(i) and any governing Internal Revenue Service guidance and Treasury regulations (“Separation from Service”), and no payment subject to Section 409A that is payable upon a termination of employment shall be paid unless and until (and not later than applicable in compliance with Section 409A) you incur a Separation from Service.  To the extent that the reimbursement of any expenses or the provision of any in-kind benefits under this Agreement is subject to Section 409A, (a) the amount of such expenses eligible for reimbursement, or in-kind benefits to be provided, during any one calendar year shall not affect the amount of such expenses eligible for reimbursement, or in-kind benefits to be provided, in any other calendar year; (b) reimbursement of any such expense shall be made by no later than December 31 of the year following the calendar year in which such expense is incurred; and (c) your right to receive such reimbursements or in-kind benefits shall not be subject to liquidation or exchange for another benefit. To the extent that Section 409A(a)(2)(B)(i) applies and you are a “specified employee” on the date of your separation from service, then any payment treated as deferred compensation under Section 409A will be postponed until the first business day after the expiration of six (6) months from the date of your separation from service (or your death if earlier).  To the extent necessary for a change in the time or manner of a payment due to a Change in Control to comply with Section 409A, such change shall be effective only if the Change in Control constitutes a change in the effective ownership or effective control of the Holding Company or the Company, as applicable, or a change in the ownership of a substantial portion of the assets of the Holding Company or the Company, as applicable, in each case within the meaning of Treasury Regulation section 1.409A-3(i)(5).

Lindsay Corby
Page 8

16.General Provisions.

(a)Notices.  All notices, consents, and other communications to be given under this Agreement shall be in writing and (i) personally delivered, (ii) mailed by registered or certified mail, postage prepaid with return receipt requested, or (iii) delivered by overnight express delivery service or same-day local courier service, to the address set forth below, or to such other address as may be designated by the parties from time to time in accordance with this Section 16(a):

If to the Holding Company and/or Company:

Byline Bancorp, Inc. and/or Byline Bank

180 North LaSalle Street

Suite 300

Chicago, Illinois 60601

(or such address hereafter where the Company locates its corporate offices)

Attention:  Director Human Resources

If to you:  At the most recent address on the payroll files of the Company

(b)Entire Agreement; Amendments; No Waiver.  This Agreement and the Agreement to Protect Company Interests supersedes all previous employment agreements, whether written or oral, between you and the Company, and constitutes the entire agreement and understanding between the Company and you concerning the subject matter hereof.  If, and to the extent that, any other written or oral agreement between you and the Company is inconsistent with or contradictory to the terms of this Agreement or the Agreement to Protect Company Interests, the terms of this Agreement or the Agreement to Protect Company Interests, as applies, shall control.  No modification, amendment, termination, or waiver of this Agreement shall be binding unless in writing and signed by you and a duly authorized officer of the Company.  Failure of the any party to insist upon strict compliance with any of the terms, covenants, or conditions hereof shall not be deemed a waiver of such terms, covenants, and conditions.

(c)Successors and Assigns.  This Agreement is binding upon and shall inure to the benefit of you and your heirs, executors, assigns and administrators or your estate and property and the Company and its successors and permitted assigns.  You may not assign or transfer to others your rights or obligation to perform your duties hereunder.

(d)Counterparts.  This Agreement may be signed in counterparts each of which will be deemed an original, but all of which will constitute one and the same instrument.

[Signature Page Follows This Page]

Lindsay Corby
Page 9

On behalf of the Holding Company and the Board, I am excited to confirm your continuing employment under this Agreement and look forward to a mutually rewarding relationship.

	Very truly yours,
	BYLINE BANCORP, INC. and BYLINE BANK By: /s/ Alberto J. Paracchini Alberto J. Paracchini Chief Executive Officer
	Date: August 7, 2019
Agreed and Accepted:
/s/ Lindsay Corby Lindsay Corby
Date: August 7, 2019

Lindsay Corby
Page 10

ATTACHMENT

Definitions

“Cause” shall mean (A) your willful and continued failure to perform substantially your duties (after written notice and a reasonable period to cure); (B) your willfully engaging in illegal conduct, an act of dishonesty or gross misconduct related to the performance of your duties and responsibilities; (C) your being charged with a crime involving moral turpitude dishonesty, fraud, theft or financial impropriety; (D) your willful violation of a material requirement of any code of ethics or standards of conduct of the Company or the Holding Company applicable to you (after written notice and a reasonable period to cure, if curable) or your violation of your fiduciary duty to the Company or the Holding Company; or (E) a breach of the Agreement Protecting Company Interests; provided, that no act or failure to act by you shall be considered “willful” if such act or omission was conducted in good faith and with a reasonable belief that the action or omission was in the best interests of the Company or the Holding Company, as applicable.  Any such termination for Cause shall be predicated by notice to you together with a copy of a resolution, duly adopted by the Board (after a reasonable opportunity for you, together with your counsel, to be heard before the Board), describing the particulars of such “for Cause” termination.

“Change in Control” shall mean the first to occur of:

(A) Any “person” (as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended), other than (i) a trustee or other fiduciary holding securities under an employee benefit plan of the Company or a subsidiary, or (ii) a corporation owned directly or indirectly by the stockholders of the Holding Company in substantially the same proportions as their ownership of stock of the Holding Company, is or becomes the “beneficial owner” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the Holding Company representing more than 50% of both (x) the total voting power of the then outstanding shares of capital stock of the Holding Company entitled to vote generally in the election of directors (the “Voting Stock”) and (y) the fair market value of the outstanding shares of capital stock of the Holding Company (“Economic Stock”);

(B) Consummation of a reorganization, merger or consolidation, the sale or other disposition of all or substantially all of the assets of the Holding Company (in each such case, a “Business Combination”), unless all or substantially all of the individuals and entities who were the beneficial owners, respectively, of both the Voting Stock and the Economic Stock immediately prior to such Business Combination beneficially own, directly or indirectly, more than 50% of either (x) the total voting power represented by the voting securities entitled to vote generally in the election of directors of the corporation resulting from the Business Combination or (y) the total fair market value represented by all the voting and nonvoting equity securities of the corporation resulting from the Business Combination (in each such case including, without limitation, an entity which as a result of the Business Combination owns the Holding Company or all or substantially all of the Holding Company’s assets either directly or through one or more subsidiaries) in substantially the same proportions as their ownership, immediately prior to the Business Combination, of the Voting Stock and Economic Stock (combined) of the Holding Company; or

(C) The stockholders of the Holding Company approve a plan of complete liquidation or dissolution of the Holding Company.

Lindsay Corby
Page 11

The Holding Company Board has final authority to construe and interpret the provisions of the foregoing paragraphs(A), (B), and (C) and to determine whether, and the exact date on which, a “Change in Control” has been deemed to have occurred thereunder.

“Disability” shall have the meaning defined under Treasury Regulation Section 1.409A-3(i)(4).

“Good Reason” means the occurrence of any of the following without your written consent:  (A) any material reduction in your Base Salary; (B) any material adverse change by the Company in your title, position, authority or reporting relationships with the Company or (C) the Company’s requirement that you relocate your principal place of employment to a location in excess of fifty (50) miles from your principal work location on the date of the Agreement provided, “Good Reason” shall not exist unless and until you provide the Company with written notice of the acts alleged to constitute Good Reason within ninety (90) days of the initial occurrence of such event, and the Company fails to cure such acts within thirty (30) days of receipt of such notice.  You must terminate your employment within 120 days following the initial occurrence of such event for the termination to be on account of Good Reason.

EXHIBIT A

GENERAL RELEASE

1.In accordance with Section 7(c)(iii) of the employment agreement entered into by and among Byline Bancorp, Inc., Byline Bank (the “Company”) and Lindsay Corby (“Executive”) dated ___________, 2019 (“Employment Agreement”), Executive’s employment with the Company and all affiliates and subsidiaries terminated on _____________, 20__ (“Separation Date”).  As a condition of entitlement to, and in consideration for, the separation benefits described in Section 7(c) of the Employment Agreement, Executive, on behalf of herself, her spouse, family, agents, attorneys, heirs, executors, administrators, and anyone else who has or obtains any legal rights or claims through Executive, hereby waives and releases any and all claims and causes of action that Executive has or may have as of the day Executive signs this General Release, whether known or unknown, against the Company, Byline Bancorp, Inc. and any of their other affiliated, related or associated companies, subsidiaries, divisions, parents, predecessors, successors, current and former officers, members of their boards of directors, and all managers, employees, shareholders, agents, attorneys, representatives, insurance companies, insurers, and assigns of such named companies and entities (collectively, the “Released Parties”), arising from any reason or cause, including but not limited to Executive’s employment and Executive’s separation from employment.  The claims Executive is releasing include, but are not limited to, any and all allegations that the Company or the other Released Parties:

(a)have discriminated or retaliated against Executive in violation of Title VII of the Civil Rights Act of 1964, the Civil Rights Act of 1866 (42 U.S.C. section 1981), the Equal Pay Act of 1963, the Age Discrimination in Employment Act (ADEA), the Americans with Disabilities Act (ADA), the Rehabilitation Act of 1973, the Older Worker’s Benefit Protection Act (OWBPA), the Illinois Human Rights Act, and any and all other applicable federal, state and local fair employment practices and discrimination laws, or on the basis of race, color, sex (including sexual harassment), national origin, ancestry, disability, religion, sexual orientation, marital status, parental status, veteran status, source of income, entitlement to benefits, union activities, or any other status protected by federal, state or local law; or

(b)have violated any other employment-related laws including but not limited to the Family and Medical Leave Act (FMLA), the Employee Retirement Income Security Act (ERISA), the Worker Adjustment and Retraining Notification Act (WARN Act), or any federal, state or local laws or statutes whether employment related or not; or

(c)have violated personnel policies, procedures, handbooks, any covenant of good faith and fair dealing, or any express or implied contract of any kind; or

(d)have violated 31 U.S.C. §§ 3730(h)(1) and (2) of the False Claims Act and similar state or local statutes; or

(e)have violated public policy or statutory or common law, including claims for:  personal injury; invasion of privacy; retaliatory discharge; negligent hiring, retention, or supervision; defamation; intentional or negligent infliction of emotional distress and/or mental anguish; intentional interference with contract or prospective economic advantage; negligence; detrimental reliance; loss of consortium to Executive or any member of Executive’s family; and/or promissory estoppel; or

(f)are in any way obligated for any reason to pay Executive damages, expenses, litigation costs (including attorneys’ fees), back pay, front pay, disability or other benefits, compensatory damages, punitive damages, and/or interest.

ADDITIONALLY, THIS AGREEMENT SPECIFICALLY WAIVES ALL OF EXECUTIVE’S RIGHTS AND POTENTIAL CLAIMS ARISING UNDER THE AGE DISCRIMINATION IN EMPLOYMENT ACT OF 1967 (29 U.S.C. §621 et seq.), AS AMENDED, AND THE OLDER WORKERS’ BENEFIT PROTECTION ACT, AS AMENDED.  In connection with this age discrimination waiver, Executive acknowledges and agrees to the following:

(i)Executive is not waiving any rights or claims under the Age Discrimination in Employment Act of 1967, as amended, that may arise after this Agreement is executed, or any rights or claims to test the knowing and voluntary nature of this Agreement under the Older Workers’ Benefit Protection Act, as amended.

(ii)Executive acknowledges that this Agreement provides Executive consideration that is in addition to anything of value to which Executive is already entitled.

(iii)Executive acknowledges that by this Agreement, Executive was encouraged and advised in writing to consult counsel by the Company prior to signing this Agreement and has done so.

(iv)Executive further understands that Executive was given forty-five (45) days to consider this Agreement.

(v)Executive further understands that she may revoke this Agreement at any time within seven days after she signs it, and that this Agreement shall not become effective or enforceable until the 7-day revocation period has expired.  If Executive desires to revoke this Agreement during the 7 days after signing it, she shall do so by sending written notice of same to the attention of        [Name], Director of Human Resources, Byline Bank, 180 North LaSalle Street, Suite 300, Chicago, Illinois 60601, certified mail, return receipt requested, within that 7-day period.  This General Release shall become effective, and the Company’s obligations under Section 7(c) of the Employment Agreement binding, on the day following expiration of such revocation period provided that this Agreement is not revoked.

(vi)If Executive signs this Agreement prior to the end of the 45-day time period, Executive certifies that, in accordance with 29 CFR §1625.22(e)(6), Executive knowingly and voluntarily decided to sign the Agreement after considering it less than 21 days and her decision to do so was not induced by the Released Parties through fraud, misrepresentation, or a threat to withdraw or alter the offer prior to the expiration of the 45-day time period.

(vii)Executive has carefully read and fully understands all of the provisions and effects of this Agreement and she knowingly and voluntarily entered into all of the terms set forth in this Agreement.

(viii)Executive knowingly and voluntarily intends to be legally bound by all of the terms set forth in this Agreement.

(ix)Executive relied solely and completely upon her own judgment or the advice of her attorney(s) in entering into this Agreement.

(x)Executive is, through this Agreement, releasing the Released Parties from any and all claims Executive may have against the Released Parties, relating to her employment and separation, including claims arising under the Age Discrimination in Employment Act of 1967 (29 U.S.C. § 621, et. seq.).

A-2

2.Exclusions from General Release.  Excluded from the general release in Section 1 are (a) any claims or rights that cannot be waived by law, (b) any claims that arise after the date this General Release is executed, (c) Executive’s right to file a workers’ compensation claim, and (d) Executive’s rights to indemnification and coverage under any applicable directors and officers liability insurance in accordance with Section 12 of the Employment Agreement.  Also excluded from the General Release is Executive’s right to file a charge with an administrative agency or participate in any agency investigation.  Executive is, however, waiving her right to recover any money in connection with such a charge or investigation.  Except for any claims or rights that cannot be waived by law, Executive also is waiving her right to recover money in connection with a charge or legal action filed by any other individual or by the Equal Employment Opportunity Commission (EEOC) or any other federal, state or local agency.  Finally, Executive acknowledges by her acceptance of the consideration provided under this Agreement, that Executive has previously been paid for all wages due, including any amounts for any vested wages, benefits or other incentive compensation payable through the date of termination of Executive’s employment.

3.Confidentiality.  Executive shall keep all of the terms of this General Release confidential, including but not limited to the fact and amount(s) of the payments and benefits referred to herein, except as required by law and except that Executive may disclose such information to her immediate family members, attorneys, and tax advisors, provided that if such person is not bound by professional rules of conduct to maintain the confidentiality of such information Executive shall first secure the person’s agreement to not disclose such information to others, and on the condition that any disclosure by any of those persons not required by law shall be deemed a breach of this General Release as if Executive personally made such disclosure.  For its part the Company will keep the terms of this Agreement confidential except that it may disclose same to those with a need to know or who are reasonably necessary to execute the Agreement or comply with its terms or for other legitimate business purposes.

4.Restrictive Covenants Affirmed.  Executive acknowledges and reaffirms that she is bound by certain restrictive covenants pursuant to the Agreement Protecting Company Interests entered into pursuant to Section 8 of the Employment Agreement, the terms of which are incorporated by reference herein.

5.Company Property. To the extent that Executive has not already done so as of the date of this General Release, prior to commencement of any payments due hereunder, Executive shall return to the Company all Company property in her possession or control.

6.Section 409A. The intent of the parties is that payments and benefits under this General Release either comply with Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”), or be exempt from the application of Section 409A and, accordingly, to the maximum extent permitted, this General Release shall be interpreted to be in compliance therewith. To the extent that any provision hereof is modified in order to comply with Section 409A, such modification shall be made in good faith and shall, to the maximum extent reasonably possible, maintain the original intent and economic benefit to the undersigned and the Company of the applicable provision without violating the provisions of Section 409A.

7.Miscellaneous. All payments to be made or benefits to be provided to Executive in accordance with this General Release shall be made net of all applicable income and employment taxes required to be withheld from such payments.  This General Release shall be governed by and construed in accordance with the laws of the State of Illinois without regard to its conflicts of law principles.

A-3

IN WITNESS WHEREOF, this General Release has been executed by Executive:

, 20__

A-4

EX-31.1

EXHIBIT 31.1

Certification of Chief Executive Officer

Pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934

and Section 302 of the Sarbanes-Oxley Act of 2002

I, Alberto J. Paracchini, certify that:

1.I have reviewed this quarterly report on Form 10-Q (the “Report”) of Byline Bancorp, Inc. (the “Registrant”):

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:   August 7, 2019
	/s/ Alberto J. Paracchini
	Alberto J. Paracchini
	President and Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

Certification of Chief Financial Officer

Pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934

and Section 302 of the Sarbanes-Oxley Act of 2002

I, Lindsay Corby, certify that:

1.I have reviewed this quarterly report on Form 10-Q (the “Report”) of Byline Bancorp, Inc. (the “Registrant”):

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:   August 7, 2019
	/s/ Lindsay Corby
	Lindsay Corby
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer)

EX-32.1

EXHIBIT 32.1(a)

CERTIFICATIONS PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Byline Bancorp, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, the Chief Executive Officer and Chief Financial Officer of the Company, each hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his or her knowledge:

1.The Report fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/	Alberto J. Paracchini
	Alberto J. Paracchini
	President and Chief Executive Officer
	(Principal Executive Officer)
	August 7, 2019
/s/	Lindsay Corby
	Lindsay Corby
	Executive Vice President & Chief Financial Officer
	(Principal Financial Officer)
	August 7, 2019

XML

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 07, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	BY
Entity Registrant Name	Byline Bancorp, Inc.
Entity Central Index Key	0001702750
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-38139
Entity Tax Identification Number	363012593
Entity Address, Address Line One	180 North LaSalle Street, Suite 300
Entity Address, City or Town	Chicago
Entity Address, State or Province	Illinois
Entity Address, Postal Zip Code	60601
City Area Code	773
Local Phone Number	244-7000
Entity Common Stock, Shares Outstanding		38,114,669

XML

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 57,513	$ 30,190
Interest bearing deposits with other banks	31,802	91,670
Cash and cash equivalents	89,315	121,860
Equity and other securities, at fair value	7,662
Securities available-for-sale, at fair value	969,029	817,656
Securities held-to-maturity, at amortized cost (fair value at June 30, 2019—$4,488, December 31, 2018—$97,739)	4,421	99,266
Restricted stock, at cost	22,937	19,202
Loans held for sale	18,473	19,827
Loans and leases:
Loans and leases	3,863,148	3,501,626
Allowance for loan and lease losses	(31,132)	(25,201)
Net loans and leases	3,832,016	3,476,425
Servicing assets, at fair value	19,760	19,693
Accrued interest receivable	12,913	10,863
Premises and equipment, net	96,588	97,680
Assets held for sale	16,329	14,489
Other real estate owned, net	8,070	5,314
Goodwill	145,638	128,177
Other intangible assets, net	35,908	33,419
Bank-owned life insurance	9,634	5,961
Deferred tax assets, net	35,737	35,643
Due from counterparty	34,226	5,338
Other assets	32,580	31,761
Total assets	5,391,236	4,942,574
LIABILITIES
Non-interest-bearing demand deposits	1,240,375	1,192,873
Interest-bearing deposits:
NOW, savings accounts, and money market accounts	1,554,791	1,413,158
Time deposits	1,265,077	1,143,885
Total deposits	4,060,243	3,749,916
Accrued interest payable	4,522	3,484
Federal Home Loan Bank advances	500,000	425,000
Securities sold under agreements to repurchase	32,885	34,166
Junior subordinated debentures issued to capital trusts, net	37,059	36,768
Accrued expenses and other liabilities	38,852	42,568
Total liabilities	4,673,561	4,291,902
STOCKHOLDERS’ EQUITY
Preferred stock	10,438	10,438
Common stock, voting, $0.01 par value at June 30, 2019 and December 31, 2018; 150,000,000 shares authorized at June 30, 2019 and December 31, 2018; 38,115,219 shares issued and outstanding at June 30, 2019 and 36,343,239 issued and outstanding at December 31, 2018	378	361
Additional paid-in capital	578,828	546,849
Retained earnings	129,379	102,522
Accumulated other comprehensive loss, net of tax	(1,348)	(9,498)
Total stockholders’ equity	717,675	650,672
Total liabilities and stockholders’ equity	$ 5,391,236	$ 4,942,574

XML

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Securities held-to-maturity, fair value	$ 4,488	$ 97,739
Common stock, voting par value	$ 0.01	$ 0.01
Common stock, voting shares authorized	150,000,000	150,000,000
Common stock, voting shares issued	38,115,219	36,343,239
Common stock, voting shares outstanding	38,115,219	36,343,239

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
INTEREST AND DIVIDEND INCOME
Interest and fees on loans and leases	$ 59,524	$ 39,627	$ 113,907	$ 73,281
Interest on taxable securities	6,237	4,572	11,996	8,627
Interest on tax-exempt securities	428	229	771	403
Other interest and dividend income	571	413	1,196	672
Total interest and dividend income	66,760	44,841	127,870	82,983
INTEREST EXPENSE
Deposits	9,306	3,745	17,382	6,243
Federal Home Loan Bank advances	2,174	1,360	4,273	2,718
Subordinated debentures and other borrowings	832	680	1,682	1,271
Total interest expense	12,312	5,785	23,337	10,232
Net interest income	54,448	39,056	104,533	72,751
PROVISION FOR LOAN AND LEASE LOSSES	6,391	3,956	10,390	9,071
Net interest income after provision for loan and lease losses	48,057	35,100	94,143	63,680
NON-INTEREST INCOME
ATM and interchange fees	945	850	1,662	1,763
Net gains on sales of securities available-for-sale	973	4	973	4
Change in fair value of equity securities, net	551		1,050
Net gains on sales of loans	7,472	9,723	13,705	17,199
Wealth management and trust income	626	192	1,221	192
Other non-interest income	768	1,527	1,664	2,386
Total non-interest income	14,183	14,211	26,171	25,334
NON-INTEREST EXPENSE
Salaries and employee benefits	23,652	19,244	46,544	37,522
Occupancy expense, net	4,337	4,499	8,617	8,254
Equipment expense	732	558	1,401	1,161
Loan and lease related expenses	1,841	1,471	3,418	2,871
Legal, audit and other professional fees	2,981	4,418	5,047	6,269
Data processing	3,849	10,371	6,993	12,672
Net loss recognized on other real estate owned and other related expenses	252	472	448	471
Regulatory assessments	371	366	312	607
Other intangible assets amortization expense	1,959	1,130	3,732	1,897
Advertising and promotions	732	347	1,441	596
Telecommunications	537	466	1,001	884
Other non-interest expense	2,711	2,137	5,679	3,889
Total non-interest expense	43,954	45,479	84,633	77,093
INCOME BEFORE PROVISION FOR INCOME TAXES	18,286	3,832	35,681	11,921
PROVISION FOR INCOME TAXES	5,075	1,064	9,873	2,385
NET INCOME	13,211	2,768	25,808	9,536
Dividends on preferred shares	195	198	391	391
INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 13,016	$ 2,570	$ 25,417	$ 9,145
EARNINGS PER COMMON SHARE
Basic	$ 0.35	$ 0.08	$ 0.69	$ 0.30
Diluted	$ 0.34	$ 0.08	$ 0.68	$ 0.29
Fees and Service Charges on Deposits [Member]
NON-INTEREST INCOME
Fees and charges	$ 1,441	$ 1,456	$ 3,211	$ 2,768
Loan Servicing Revenue [Member]
NON-INTEREST INCOME
Fees and charges	2,630	2,533	5,169	4,983
Loan Servicing Asset Revaluation [Member]
NON-INTEREST INCOME
Fees and charges	$ (1,223)	$ (2,074)	$ (2,484)	$ (3,961)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 13,211	$ 2,768	$ 25,808	$ 9,536
Securities available-for-sale
Unrealized holding gains (losses) arising during the period	12,328	(2,556)	20,962	(11,408)
Reclassification adjustments for net gains included in net income	(973)	(4)	(973)	(4)
Tax effect	(3,405)	782	(5,700)	3,177
Net of tax	7,950	(1,778)	14,289	(8,235)
Cash flow hedges
Unrealized holding gains (losses) arising during the period	(3,417)	1,562	(5,234)	5,632
Reclassification adjustments for net gains included in net income	(575)	(374)	(1,280)	(435)
Tax effect	1,113	(331)	1,815	(1,447)
Net of tax	(2,879)	857	(4,699)	3,750
Total other comprehensive income (loss)	5,071	(921)	9,590	(4,485)
Comprehensive income	$ 18,282	$ 1,847	$ 35,398	$ 5,051

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017	$ 458,578	$ 10,438	$ 292	$ 391,586	$ 61,349	$ (5,087)
Beginning balance, shares at Dec. 31, 2017		10,438	29,317,298
Net income	6,768				6,768
Other comprehensive income (loss), net of tax	(3,564)					(3,564)
Issuance of common stock upon exercise of stock options	1,005		$ 1	1,004
Issuance of common stock upon exercise of stock options, shares			86,750
Reclassification of certain income tax effects from accumulated other comprehensive income (loss)					763	(763)
Cash dividends declared on preferred stock	(193)				(193)
Share-based compensation expense	342			342
Ending balance at Mar. 31, 2018	462,936	$ 10,438	$ 293	392,932	68,687	(9,414)
Ending balance, shares at Mar. 31, 2018		10,438	29,404,048
Beginning balance at Dec. 31, 2017	458,578	$ 10,438	$ 292	391,586	61,349	(5,087)
Beginning balance, shares at Dec. 31, 2017		10,438	29,317,298
Net income	9,536
Other comprehensive income (loss), net of tax	(4,485)
Reclassification of certain income tax effects from accumulated other comprehensive income (loss)	(763)
Ending balance at Jun. 30, 2018	616,406	$ 10,438	$ 360	544,686	71,257	(10,335)
Ending balance, shares at Jun. 30, 2018		10,438	36,218,955
Beginning balance at Dec. 31, 2017	458,578	$ 10,438	$ 292	391,586	61,349	(5,087)
Beginning balance, shares at Dec. 31, 2017		10,438	29,317,298
Ending balance at Dec. 31, 2018	650,672	$ 10,438	$ 361	546,849	102,522	(9,498)
Ending balance, shares at Dec. 31, 2018		10,438	36,343,239
Beginning balance at Mar. 31, 2018	462,936	$ 10,438	$ 293	392,932	68,687	(9,414)
Beginning balance, shares at Mar. 31, 2018		10,438	29,404,048
Net income	2,768				2,768
Other comprehensive income (loss), net of tax	(921)					(921)
Issuance of common stock upon exercise of stock options	130			130
Issuance of common stock upon exercise of stock options, shares			8,000
Issuance of common stock and stock options due to business combination, net of issuance costs	151,275		$ 67	151,208
Issuance of common stock and stock options due to business combination, net of issuance costs, shares			6,682,850
Issuance of common stock in connection with restricted stock awards, shares			126,157
Forfeiture of restricted stock awards, shares			(2,100)
Cash dividends declared on preferred stock	(198)				(198)
Share-based compensation expense	416			416
Ending balance at Jun. 30, 2018	616,406	$ 10,438	$ 360	544,686	71,257	(10,335)
Ending balance, shares at Jun. 30, 2018		10,438	36,218,955
Net income	14,536				14,536
Other comprehensive income (loss), net of tax	(2,027)					(2,027)
Issuance of common stock upon exercise of stock options	567		$ 1	566
Issuance of common stock upon exercise of stock options, shares			51,763
Issuance of common stock in connection with employee stock purchase plan	172			172
Issuance of common stock in connection with employee stock purchase plan, shares			8,882
Cash dividends declared on preferred stock	(196)				(196)
Share-based compensation expense	403			403
Ending balance at Sep. 30, 2018	629,861	$ 10,438	$ 361	545,827	85,597	(12,362)
Ending balance, shares at Sep. 30, 2018		10,438	36,279,600
Net income	17,121				17,121
Other comprehensive income (loss), net of tax	2,864					2,864
Issuance of common stock upon exercise of stock options	638			638
Issuance of common stock upon exercise of stock options, shares			58,639
Issuance of common stock in connection with restricted stock awards, shares			5,000
Issuance of common stock in connection with employee stock purchase plan	31			31
Cash dividends declared on preferred stock	(196)				(196)
Share-based compensation expense	353			353
Ending balance at Dec. 31, 2018	650,672	$ 10,438	$ 361	546,849	102,522	(9,498)
Ending balance, shares at Dec. 31, 2018		10,438	36,343,239
Net income	12,597				12,597
Other comprehensive income (loss), net of tax	4,519					4,519
Issuance of common stock upon exercise of stock options	636		$ 1	635
Issuance of common stock upon exercise of stock options, shares			50,662
Forfeiture of restricted stock awards, shares			(8,500)
Issuance of common stock in connection with employee stock purchase plan	291			291
Issuance of common stock in connection with employee stock purchase plan, shares			12,743
Cumulative-effect adjustment (ASU 2016-01) | ASU 2016-01					1,440	(1,440)
Cash dividends declared on preferred stock	(196)				(196)
Share-based compensation expense	230			230
Ending balance at Mar. 31, 2019	668,749	$ 10,438	$ 362	548,005	116,363	(6,419)
Ending balance, shares at Mar. 31, 2019		10,438	36,398,144
Beginning balance at Dec. 31, 2018	650,672	$ 10,438	$ 361	546,849	102,522	(9,498)
Beginning balance, shares at Dec. 31, 2018		10,438	36,343,239
Net income	25,808
Other comprehensive income (loss), net of tax	9,590
Ending balance at Jun. 30, 2019	717,675	$ 10,438	$ 378	578,828	129,379	(1,348)
Ending balance, shares at Jun. 30, 2019		10,438	38,115,219
Beginning balance at Mar. 31, 2019	668,749	$ 10,438	$ 362	548,005	116,363	(6,419)
Beginning balance, shares at Mar. 31, 2019		10,438	36,398,144
Net income	13,211				13,211
Other comprehensive income (loss), net of tax	5,071					5,071
Issuance of common stock upon exercise of stock options	1,669		$ 1	1,668
Issuance of common stock upon exercise of stock options, shares			116,048
Issuance of common stock and stock options due to business combination, net of issuance costs	28,892		$ 15	28,877
Issuance of common stock and stock options due to business combination, net of issuance costs, shares			1,464,558
Issuance of common stock in connection with restricted stock awards, shares			141,207
Forfeiture of restricted stock awards, shares			(4,738)
Cash dividends declared on preferred stock	(195)				(195)
Share-based compensation expense	278			278
Ending balance at Jun. 30, 2019	$ 717,675	$ 10,438	$ 378	$ 578,828	$ 129,379	$ (1,348)
Ending balance, shares at Jun. 30, 2019		10,438	38,115,219

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 25,808	$ 9,536
Adjustments to reconcile net income to net cash from operating activities:
PROVISION FOR LOAN AND LEASE LOSSES	10,390	9,071
Impairment loss on assets held for sale	392	117
Depreciation and amortization of premises and equipment	3,260	2,608
Change in fair value of equity securities, net	(1,050)
Net amortization of securities	1,192	1,876
Net gains on sales of securities available-for-sale	(973)	(4)
Losses on disposal of premises and equipment		98
Net gains on sales of assets held for sale	(13)	(260)
Net gains on sales of loans	(13,705)	(17,199)
Originations of U.S. government guaranteed loans	(140,780)	(175,120)
Proceeds from U.S. government guaranteed loans sold	133,061	204,807
Accretion of premiums and discounts on acquired loans, net	(10,069)	(5,941)
Net change in servicing assets	(67)	(187)
Net valuation adjustments on other real estate owned	163	213
Net losses on sales of other real estate owned	27	109
Other intangible assets amortization expense	3,732	1,897
Amortization of time deposit premium	(111)	(84)
Amortization of Federal Home Loan Bank advances premium		(19)
Accretion of junior subordinated debentures discount	291	308
Share-based compensation expense	508	758
Deferred tax provision, net of valuation	906	2,225
Increase in cash surrender value of bank owned life insurance	(188)	(168)
Changes in assets and liabilities:
Accrued interest receivable	(3,036)	(77)
Other assets	(10,445)	(3,803)
Accrued interest payable	957	686
Accrued expenses and other liabilities	(9,731)	22,530
Net cash (used in) provided by operating activities	(9,481)	53,977
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of securities available-for-sale	(149,176)	(96,086)
Proceeds from maturities and calls of securities available-for-sale	33,671	6,630
Proceeds from paydowns of securities available-for-sale	42,176	29,462
Proceeds from sales of securities available-for-sale	59,594	544
Proceeds from paydowns of securities held-to-maturity		9,601
Purchases of Federal Home Loan Bank stock	(19,935)	(13,998)
Federal Home Loan Bank stock repurchases	16,614	12,724
Net change in loans and leases	(95,799)	(166,130)
Purchases of premises and equipment	(1,413)	(537)
Proceeds from sales of assets held for sale	514	1,041
Proceeds from sales of other real estate owned	1,148	4,678
Net cash received in acquisition of business	4,306	20,374
Net cash used in investing activities	(108,300)	(191,697)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	20,267	179,364
Proceeds from Federal Home Loan Bank advances	3,503,500	2,941,900
Repayments of Federal Home Loan Bank advances	(3,433,800)	(2,883,387)
Proceeds from line of credit	5,680
Repayments of line of credit	(11,335)
Net decrease in securities sold under agreements to repurchase	(1,281)	(6,534)
Dividends paid on preferred stock	(391)	(391)
Proceeds from issuance of common stock upon exercise of stock options	2,305	1,135
Proceeds from issuance of common stock	291
Net cash provided by financing activities	85,236	232,087
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(32,545)	94,367
CASH AND CASH EQUIVALENTS, beginning of period	121,860	58,349
CASH AND CASH EQUIVALENTS, end of period	89,315
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	22,200	9,081
Cash payments (refunds) during the period for taxes	9,507	2,752
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in fair value of available-for-sale securities, net of tax	14,289	(8,235)
Change in fair value of cash flow hedges, net of tax	(4,699)	3,750
Delayed payments of mortgage-backed securities	841	621
Transfer of securities from held-to-maturity to available-for-sale	94,837
Reclassification of equity and other securities	6,609
Transfers of loans to other real estate owned	2,076	1,220
Internally financed sale of other real estate owned	183	444
Transfers of land and premises to assets held for sale	2,733	2,531
Transfers of premises and equipment to other assets		2
Transfer of other assets to assets held for sale		16
Due from counterparties	34,226	25,569
Due to broker		10,029
Total assets acquired from acquisition	341,375	1,142,766
Total liabilities assumed from acquisition	305,892	1,036,609
Common stock and stock options issued due to acquisition of business	$ 29,320	$ 152,127

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Basis of Presentation

6 Months Ended

Jun. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Basis of Presentation

Note 1—Basis of Presentation

These unaudited interim condensed consolidated financial statements include the accounts of BylineBancorp, Inc., a Delaware corporation(the“Company,” “Byline,”“we,” “us,”“our”),a bank holding companywhose principalactivityistheownershipand managementof its Illinois state chartered subsidiarybank, BylineBank (the “Bank”), based in Chicago, Illinois.

These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). In preparing these financial statements, the Company has evaluated events and transactions subsequent to June 30, 2019 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information in footnote disclosures normally included in financial statements prepared in accordance with GAAP has been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Consolidated Financial Statements for the years ended December 31, 2018, 2017, and 2016.

In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s management has evaluated subsequent events for potential recognition or disclosure through the date of the issuance of these consolidated financial statements.

The Company has one reportable segment. The Company’s chief operating decision maker evaluates the operations of the Company using consolidated information for purposes of allocating resources and assessing performance. Therefore, segments disclosures are not required.

No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements.

Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity.

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Accounting Pronouncements Recently Adopted or Issued

6 Months Ended

Jun. 30, 2019

Accounting Changes And Error Corrections [Abstract]

Accounting Pronouncements Recently Adopted or Issued

Note 2—Accounting Pronouncements Recently Adopted or Issued

The following reflect recent accounting pronouncements that have been adopted or are pending adoption by the Company. As the Company qualifies as an emerging growth company and has elected the extended transition period for complying with new or revised accounting pronouncements, it is not subject to new or revised accounting standards applicable to public companies during the extended transition period. The accounting pronouncements pending adoption below reflect effective dates for the Company as an emerging growth company with the extended transition period.

Adopted Accounting Pronouncements

Revenue from Contracts with Customers In May 2014, FASB issued Accounting Standards Update (“ASU”) No. 2014-09, deferred by ASU No. 2015-14 and clarifying standards, Revenue from Contracts with Customers, which creates Topics 606 and 610 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In April 2016, FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing. The amendments in this ASU clarify the following two aspects of Topic 606: (1) identifying performance obligations and (2) licensing implementation guidance, while retaining the related principles for those areas. In May 2016, FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, amending ASC Topic 606, Revenue from Contracts with Customers. The amendments in this ASU affect only several narrow aspects of Topic 606. In November 2017, FASB issued ASU No. 2017-14, amending ASC Topic 606, Revenue from Contracts with Customers. The ASU amends the codification to incorporate additional previously issued guidance from the SEC. The SEC issued SAB 116 to bring existing SEC staff guidance into conformity with the FASB’s adoption of and amendments to ASC Topic 606.

In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The new authoritative guidance was initially effective for reporting periods after January 1, 2017 but was deferred to January 1, 2018. Given our emerging growth status, the Company adopted this new guidance on January 1, 2019 using the full retrospective method, meaning the standard is applied to all periods presented in the financial statements with the cumulative effect of initially applying the standard recognized at the beginning of the earliest period presented.

The majority of the Company’s revenue streams, including interest and dividend income, servicing fees, and gains on sales of loans and investments, are outside the scope of Topic 606. Revenue streams reported as fees and service charges on deposits, ATM and interchange fees, and wealth management and trust income are within the scope of Topic 606. The Company applied the requirements of Topic 606 to the revenue streams that are within its scope. The adoption of Topic 606 did not result in any changes in the either timing or amount of recognized; there was no cumulative effect adjustment to opening retained earnings as no material changes were identified in the timing of revenue recognition. However, the presentation of certain costs associated with our ATM and debit card income were offset against ATM and interchange income. This change in presentation resulted in $381,000 and $727,000 of expenses for the three and six months ended June 30, 2019, respectively, being netted against ATM and interchange fees and reported in non-interest income instead of as other non-interest expense in non-interest expense. In addition, to conform to the current period presentation, $291,000 and $596,000 of related expenses for the three and six months ended June 30, 2018, respectively, were reclassified from other non-interest expense in non-interest expense to being netted against ATM and interchange fees in non-interest income. The Company elected to apply the practical expedient and therefore does not disclose information about remaining performance obligations that have an original expected term of one year or less and allows the Company to expense costs related to obtaining a contract as incurred when the amortization period would have been one year or less.

The Company adopted ASU 2014-09 using the full retrospective approach. The following table presents the impact of adopting the new revenue standard on our Consolidated Statements of Operations for the periods presented (in thousands):

	For the Three Months Ended							For the Three Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	945	$	1,326	$	(381	)	$	850	$	1,141	$	(291	)
Non-interest expense:
Other non-interest expense	$	2,711	$	3,092	$	(381	)	$	2,137	$	2,428	$	(291	)

	For the Six Months Ended							For the Six Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	1,662	$	2,389	$	(727	)	$	1,763	$	2,359	$	(596	)
Non-interest expense:
Other non-interest expense	$	5,679	$	6,406	$	(727	)	$	3,889	$	4,485	$	(596	)

Fees and service charges on deposits:  

Fees and service charges on deposits include transaction and non-transaction based deposit fees. Transaction based fees on deposit accounts are charged to deposit customers for specific services provided to the customer. These fees include such items as wire fees, official check fees, and overdraft fees. These are contracts specific to each individual transaction and do not extend beyond the individual transaction. The performance obligation is completed and the fees are recognized at the time the specific transactional service is provided to the customer. Non-transactional deposit fees are typically monthly account maintenance fees charged on deposit accounts. These are day-to-day contracts that can be cancelled by either party without notice. The performance obligation is satisfied and the fees are recognized on a monthly basis after the service period is completed.

ATM and interchange fees:  

ATM fees represent fees earned when a foreign debit or ATM card is used in a Byline Bank ATM. These fees are assessed and paid at the time of each transaction as the performance obligation is satisfied, which is at the point in time that the transaction is performed and approved. Interchange fees represent fees earned when a debit card issued by the Bank is used to purchase goods or services at a merchant. The merchant's bank pays the Bank a default interchange rate set by MasterCard on a transaction by transaction basis. Interchange fees are assessed as the performance obligation is satisfied, which is at the point in time the card transaction is authorized. The performance obligation is satisfied and the fees are earned when the cost of the transaction is charged to the Bank cardholders’ card. Direct expenses associated with ATM and debit cards are recorded as a net reduction against the ATM and interchange income.

Wealth management and trust income

Wealth management and trust income represents fees earned by the Bank for discretionary investment management, trust administration, fiduciary and/or custody services rendered. Fees vary and are based on a contract with the customer. Fee income is determined as a percentage of assets under management and is recognized over the period the underlying account is serviced. Although some trust appointments can last for generations, most contracts are generally cancellable at any time, with the customer subject to a pro-rated fee in the month of termination.

Recognition and Measurement of Financial Assets and Financial Liabilities In January 2016, FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this ASU require equity securities to be measured at fair value with changes in the fair value recognized through net income. The amendments allow equity investments that do not have readily determinable fair values to be remeasured at fair value under certain circumstances and require enhanced disclosures about those investments. The amendments simplify the impairment assessment of equity investments without readily determinable fair values. The amendments also eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The amendments require entities to adjust fair value disclosures for financial instruments to be reflected at an exit price. The amendments in this ASU require separate presentation in other comprehensive income of the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This amendment excludes from net income gains or losses that the entity may not realize because those financial liabilities are not usually transferred or settled at their fair values before maturity. The amendments in this ASU require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements. The Company adopted the provisions of ASU No. 2016-01 as of January 1, 2019. The adoption of this ASU resulted in the Company reclassifying $1.4 million from other comprehensive income to retained earnings, representing the unrealized gain, net of tax, on available-for-sale for sale equity securities at the date of adoption. The provisions of ASU No. 2016-01 require any future changes in fair value of equity securities to be recorded in the Consolidated Statements of Operations which could result in additional volatility in non-interest income. At December 31, 2018, the Company held $6.6 million of available-for-sale equity investment securities, which were previously reported as available-for-sale securities, at fair value, and are now reported as equity and other securities, at fair value.

In addition, the adoption of this ASU resulted in changing how the Company estimates the fair value of portfolio loans and leases for disclosure purposes. Fair values are estimated first by stratifying the portfolios of loans and leases with similar financial characteristics. Loans and leases are segregated by type such as commercial real estate, residential mortgage, construction, land, and development, commercial and industrial, consumer and other. Each loan and lease category is further segmented into fixed- and adjustable-rate interest terms. An estimate of fair value is then calculated based on discounted cash flows using as a discount rate based on the current rate offered on similar products, plus an adjustment for liquidity to reflect the non-homogeneous nature of the loans and leases, as well as a quarterly loss rate based on historical losses to arrive at an estimated exit price fair value. Fair value for impaired loans and leases is also based on recent appraisals or estimated cash flows discounted using rates commensurate with risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are judgmentally determined using available market information and specific borrower information.

Derivatives and Hedging (Topic 815) In August 2017, FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities. The amendments in this ASU better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The Company adopted the provisions of ASU No. 2017-12 on January 1, 2019. Upon adoption, the Company elected to reclassify $94.8 million of securities held-to-maturity to securities available-for-sale, which did not impact on the Consolidated Statements of Operations.

Compensation—Stock Compensation (Topic 718) In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting. The amendments in the ASU provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all of the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified.  If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification. (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified. (3) the classification of the modified award is an equity instrument or liability instrument is the same as the classification of the original award immediately before the original award is modified.  The amendments are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period, for reporting periods for which financial statements have not yet been issued. The amendments should be applied prospectively to an award modified on or after the adoption date. Given our emerging growth status, the Company adopted the provisions of ASU No. 2017-09 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

Statement of Cash Flows (Topic 230) In August 2016, FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments. There is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230 and other Topics. This ASU addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. Those eight issues are (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions, and (8) separately identifiable cash flows and application of the predominance principle. Current GAAP either is unclear or does not include specific guidance on these eight cash flow classification issues. These amendments provide guidance for each of the eight issues, thereby reducing current and potential future diversity in practice. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. Given the Company’s emerging growth company status, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company adopted the provisions of ASU No. 2016-15 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash. The ASU will require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this update apply to all entities that have restricted cash or restricted cash equivalents and are required to present a statement of cash flows under Topic 230. The amendment is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years. Given our emerging growth status, the Company adopted these amendments on January 1, 2019 in conjunction with ASU No. 2016-15, which did not have a material impact on the Company’s Consolidated Financial Statements.

Business Combinations (Topic 805) In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business. The guidance clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. This guidance is effective for annual and interim periods beginning after December 15, 2017. Given our emerging growth status, the Company adopted the provisions of ASU No. 2017-01 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

Fair Value Measurement (Topic 820) In August 2018, FASB issued ASU No. 2018-13, Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU modify the disclosure requirements on fair value measurements in Topic 820. The amendments remove the disclosure requirements for the amount and reasons for transfers between Level 1 and Level 2 securities of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurement. The amendments modify the disclosure requirements as follows:for investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly; andclarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The amendments add the following disclosure requirements: the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period; andthe range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Early adoption is permitted. The Company early adopted these amendments in 2018, which did not have a material impact on the Company’s Consolidated Financial Statements.

Issued Accounting Pronouncements Pending Adoption

Leases (Topic 842) In February 2016, FASB issued ASU No. 2016-02, Leases. The amendments in this ASU require lessees to recognize the following for all leases (with the exception of short-term) at the commencement date; a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The amendments in this ASU leave lessor accounting largely unchanged, although certain targeted improvements were made to align lessor accounting with the lessee accounting model. This ASU simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company expects an increase in assets and liabilities as a result of recognizing additional right-to-use assets and liabilities under lease contracts in which the Company is lessee. While the Company has not quantified the impact of this ASU on its leasing portfolio, it does not expect a change in its accounting for the initial direct costs of leases.

Financial Instruments—Credit Losses (Topic 326) In June 2016, FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments. Current GAAP requires an “incurred loss” methodology for recognizing credit losses that delays recognition until it is probable a loss has been incurred. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this ASU replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this ASU require a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit loss, which will be more decision useful to users of the financial statements. The amendments in this ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2021. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. While the Company has not quantified the impact of this ASU, it does expect changing from the current incurred loss model to an expected loss model will result in an earlier recognition of losses.

Nonrefundable Fees and Other Costs (Subtopic 310-20) In March 2017, FASB issued ASU No. 2017-08, Receivables—Nonrefundable Fees and Other Costs. The amendments in the ASU shorten the amortization period for certain callable debt securities held at a premium at the earliest call date. Under current GAAP, the Company amortizes the premium as an adjustment of yield over the contractual life of the instrument. As a result, upon exercise of a call on a callable debt security held at a premium, the unamortized premium is charged to earnings. The ASU shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. However, the amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company is required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017-08 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements.

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Acquisitions

6 Months Ended

Jun. 30, 2019

Business Combinations [Abstract]

Acquisitions

Note 3—Acquisitions

On April 30, 2019, the Company acquired all of the outstanding common stock of Oak Park River Forest Bankshares, Inc. (“Oak Park River Forest”) and its subsidiary pursuant to an Agreement and Plan of Merger, dated as of October 17, 2018 (the “OPRF Merger Agreement”). Oak Park River Forest operated one wholly owned subsidiary, Community Bank of Oak Park River Forest. Oak Park River Forest was merged with and into Byline. As a result of the merger, Oak Park River Forest’s subsidiary bank, Community Bank of Oak Park River Forest, was merged with and into Byline Bank, with Byline Bank as the surviving bank.

At the effective time of the merger (the “OPRF Effective Time”), each share of Oak Park River Forest’s common stock was converted into the right to receive: (1) 7.9321 shares of Byline’s common stock, and (2) an amount in cash equal to $6.2 million divided by the number of outstanding shares of Oak Park River Forest common stock as of the closing date, with cash paid in lieu of any fractional shares. The per share cash consideration was based on the total $6.2 million divided by the outstanding shares of Oak Park River Forest common stock, or $33.375 per outstanding share. Based on the closing price of the Company’s common stock of $20.02, as reported by the New York Stock Exchange, and 1,464,558 shares of common stock issued with respect to the outstanding shares of Oak Park River Forest common stock, the stock consideration was valued at $29.3 million.  Options to acquire 35,870 shares of Oak Park River Forest common stock that were outstanding at the OPRF Effective Time were cancelled, at the option holders election, in exchange for a cash payment in accordance with the OPRF Merger agreement of $4.2 million, to be paid after the closing date. The value of the total merger consideration at closing was $35.5 million before issuance costs of $429,000.

The transaction resulted in goodwill of $17.5 million, which is nondeductible for tax purposes, as this acquisition was a nontaxable transaction. Goodwill represents the premium paid over the fair value of the net tangible and intangible assets acquired and reflects related synergies expected from the combined operations. The Company incurred Oak Park River Forest merger-related expenses, including acquisition advisory expenses, of $2.4 million for the three months ended June 30, 2019 and $2.5 million for the six months ended June 30, 2019. Core system conversion expenses were $703,000 related to the Oak Park River Forest acquisition for the three and six months ended June 30, 2019. These expenses are reflected in non-interest expense on the Consolidated Statements of Operations.

The acquisition of Oak Park River Forest was accounted for using the acquisition method of accounting in accordance with ASC Topic 805. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. Fair values are preliminary and subject to refinement for up to one year after the closing date of the acquisition as additional information regarding the closing date fair values become available.

On May 31, 2018, the Company acquired all common stock of First Evanston Bancorp, Inc. (“First Evanston”) and its subsidiaries pursuant to an Agreement and Plan of Merger, dated as of November 27, 2017 (the “Merger Agreement”). First Evanston operated two wholly owned subsidiaries, First Bank & Trust and First Evanston Bancorp Trust I. First Evanston was merged with and into Byline. As a result of the merger, First Evanston’s subsidiary bank, First Bank & Trust, was merged with and into Byline Bank, with Byline Bank as the surviving bank. 

At the effective time of the merger (the “Effective Time”), each share of First Evanston’s common stock was converted into the right to receive: (1) 3.994 shares of Byline’s common stock, and (2) an amount in cash equal to $27.0 million divided by the number of outstanding shares of First Evanston common stock as of the closing date, with cash paid in lieu of any fractional shares. The per share cash consideration was based on the total $27.0 million divided by the outstanding shares of First Evanston common stock, or $16.136 per outstanding share. Based on the closing price of the Company’s common stock of $21.62, as reported by the New York Stock Exchange, and 6,682,850 shares of common stock issued with respect to the outstanding shares of First Evanston common stock, the stock consideration was valued at $144.5 million. Options to acquire 144,090 shares of First Evanston common stock that were outstanding at the Effective Time were converted into options to acquire 680,787 shares of Byline common stock, resulting in a consideration value of $7.6 million. The value of the total merger consideration at closing was $179.1 million before issuance costs of $852,000.

The transaction resulted in goodwill of $73.6 million, which is nondeductible for tax purposes, as this acquisition was a nontaxable transaction. The Company incurred First Evanston merger-related expenses, including acquisition advisory expenses,of $1.5 million for the three months ended June 30, 2018. There were no merger-related expenses incurred for the three months ended June 30, 2019. Merger-related expenses were $1.6 million for the six months ended June 30, 2018. There were no merger-related expenses incurred for the six months ended June 30, 2019. Core system conversion expenses were $394,000 related to the First Evanston acquisition for the three months ended June 30, 2019. There were $9.0 million of core system conversion expenses incurred during the three months ended June 30, 2018. Core system conversion expenses were $1.9 million and $9.0 million for the six months ended June 30, 2019 and 2018, respectively. These expenses are reflected in non-interest expense on the Consolidated Statements of Operations.

The acquisition of First Evanston was accounted for using the acquisition method of accounting in accordance with ASC Topic 805. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities involves significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair value adjustments associated with this transaction were finalized during the fourth quarter of 2018.

The following table presents a summary of the fair values of assets acquired and liabilities assumed as of the acquisition dates:

	Preliminary Estimates April 30, 2019 Oak Park River Forest		May 31, 2018 First Evanston
Assets
Cash and cash equivalents	$	10,469	$	47,378
Securities available-for-sale		30,343		128,063
Restricted stock		414		1,360
Loans		261,151		916,011
Premises and equipment		3,488		15,890
Other real estate owned		2,201		—
Other intangible assets		6,220		22,276
Bank-owned life insurance		3,485		—
Deferred tax assets, net		4,887		2,302
Other assets		1,256		8,845
Total assets acquired		323,914		1,142,125
Liabilities
Deposits		290,171		1,022,268
Line of credit		5,655		—
Federal Home Loan Bank advances		5,300		—
Junior subordinated debentures		—		8,497
Accrued expenses and other liabilities		4,766		5,844
Total liabilities assumed		305,892		1,036,609
Net assets acquired	$	18,022	$	105,516
Consideration paid
Common stock (2019 - 1,464,558 shares issued at $20.02 per    share, 2018 - 6,682,850 shares issued at $21.62 per share)		29,320		144,483
Outstanding stock options converted to Byline stock    options		—		7,644
Cash paid		6,163		27,004
Total consideration paid		35,483		179,131
Goodwill	$	17,461	$	73,615

The following table presents the acquired non-impaired loans as of the acquisition dates:  

	April 30, 2019 Oak Park River Forest		May 31, 2018 First Evanston
Fair value	$	212,587	$	890,986
Gross contractual amounts receivable		275,553		1,057,374
Estimate of contractual cash flows not expected to be    collected(1)		23,932		36,544
Estimate of contractual cash flows expected to be collected		251,621		1,020,830

(1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

The discount on the acquired non-impaired loans is being accreted into income over the life of the loans on an effective yield basis.  

The following table provides the unaudited pro forma information for the results of operations for the three and six months ended June 30, 2019 and 2018, as if the acquisitions had occurred on January 1, 2018. The pro forma results combine the historical results of First Evanston and Oak Park River Forest into the Company’s Consolidated Statements of Operations, including the impact of certain acquisition accounting adjustments, which includes loan discount accretion, intangible assets amortization, deposit premium accretion, and borrowing, net of discount amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2018. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, provision for credit losses, expense efficiencies or asset dispositions. The acquisition-related expenses that have been recognized are included in net income in the following table for the three and six months ended June 30, 2019 and 2018.

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Total revenues (net interest income and non-interest    income)	$	69,874	$	68,041	$	136,770	$	131,636
Net income	$	14,909	$	14,280	$	29,460	$	26,372
Earnings per share—basic	$	0.39	$	0.38	$	0.77	$	0.69
Earnings per share—diluted	$	0.38	$	0.37	$	0.76	$	0.68

The operating results of the Company include the operating results produced by the acquired assets and assumed liabilities of First Evanston for the period beginning June 1, 2018 through June 30, 2019, and Oak Park River Forest for the period beginning May 1, 2019 through June 30, 2019. Revenues and earnings of the acquired companies since the acquisition date have not been disclosed as it is not practicable as First Evanston and Oak Park River Forest were both merged into the Company and separate financial information is not readily available.

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Securities

6 Months Ended

Jun. 30, 2019

Investments Debt And Equity Securities [Abstract]

Securities

Note 4—Securities

The followingtablessummarizetheamortizedcostand fairvaluesof securitiesavailable-for-sale, securitiesheld-to-maturity and equity and other securitiesas of the dates shown and thecorrespondingamountsof grossunrealized gainsand losses:

June 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	45,348	$	482	$	—		$	45,830
U.S. Government agencies		176,425		1,434		(153	)		177,706
Obligations of states, municipalities, and political    subdivisions		88,240		1,695		(17	)		89,918
Residential mortgage-backed securities
Agency		354,480		1,820		(3,889	)		352,411
Non-agency		94,471		418		(399	)		94,490
Commercial mortgage-backed securities
Agency		123,639		765		(1,010	)		123,394
Non-agency		31,302		83		(16	)		31,369
Corporate securities		38,717		290		(108	)		38,899
Other securities		15,012		—		—			15,012
Total	$	967,634	$	6,987	$	(5,592	)	$	969,029

June 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	4,421	$	67	$	—	$	4,488
Total	$	4,421	$	67	$	—	$	4,488

December 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	52,775	$	81	$	(189	)	$	52,667
U.S. Government agencies		187,427		367		(1,296	)		186,498
Obligations of states, municipalities, and political    subdivisions		60,686		133		(586	)		60,233
Residential mortgage-backed securities
Agency		284,038		101		(11,176	)		272,963
Non-agency		84,998		199		(1,576	)		83,621
Commercial mortgage-backed securities
Agency		93,543		55		(3,164	)		90,434
Non-agency		31,458		—		(1,000	)		30,458
Corporate securities		34,716		67		(610	)		34,173
Other securities		4,613		2,127		(131	)		6,609
Total	$	834,254	$	3,130	$	(19,728	)	$	817,656

December 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	23,835	$	40	$	(210	)	$	23,665
Residential mortgage-backed securities
Agency		40,082		93		(531	)		39,644
Non-agency		35,349		—		(919	)		34,430
Total	$	99,266	$	133	$	(1,660	)	$	97,739

The Company did not classify securities as trading during the three or six months ended June 30, 2019 or during 2018.

The Company adopted the provisions of ASU No. 2016-01 as of January 1, 2019. The adoption of this ASU resulted in the reclassification of available-for-sale equity securities, at fair value to a separate line item on the Company’s Consolidated Statements of Financial Condition, and the reclassification of $1.4 million from other comprehensive income to retained earnings, representing the net unrealized gain, net of tax, on available-for-sale for sale equity securities at the date of adoption. At December 31, 2018, the Company held $6.6 million of available-for-sale equity investment securities which were reported as available-for-sale securities, at fair value, and are now reported as equity and other securities, at fair value. Additionally, the Company adopted the provisions of ASU No. 2017-12 on January 1, 2019, and elected to reclassify $94.8 million of securities held-to-maturity to securities available-for-sale, which did not impact on the Consolidated Statements of Operations.

Gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2019 and December 31, 2018, are summarized as follows:

			Less than 12 Months					12 Months or Longer					Total
June 30, 2019	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		—	$	—	$	—		$	—	$	—		$	—	$	—
U.S. Government agencies		7		367		(1	)		41,223		(152	)		41,590		(153	)
Obligations of states, municipalities and    political subdivisions		7		—		—			4,792		(17	)		4,792		(17	)
Residential mortgage-backed securities
Agency		45		—		—			244,457		(3,889	)		244,457		(3,889	)
Non-agency		10		—		—			59,976		(399	)		59,976		(399	)
Commercial mortgage-backed securities
Agency		8		11,273		(31	)		50,907		(979	)		62,180		(1,010	)
Non-agency		1		—		—			10,322		(16	)		10,322		(16	)
Corporate securities		5		2,523		(18	)		8,006		(90	)		10,529		(108	)
Other securities		—		—		—			—		—			—		—
Total		83	$	14,163	$	(50	)	$	419,683	$	(5,542	)	$	433,846	$	(5,592	)

			Less than 12 Months					12 Months or Longer					Total
December 31, 2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		18	$	23,835	$	(52	)	$	9,865	$	(137	)	$	33,700	$	(189	)
U.S. Government agencies		25		43,487		(80	)		50,101		(1,216	)		93,588		(1,296	)
Obligations of states, municipalities and    political subdivisions		56		13,926		(97	)		18,563		(489	)		32,489		(586	)
Residential mortgage-backed securities
Agency		42		4,288		(45	)		254,121		(11,131	)		258,409		(11,176	)
Non-agency		8		59,107		(1,378	)		4,009		(198	)		63,116		(1,576	)
Commercial mortgage-backed securities
Agency		9		21,356		(447	)		52,640		(2,717	)		73,996		(3,164	)
Non-agency		5		—		—			30,458		(1,000	)		30,458		(1,000	)
Corporate securities		15		25,762		(342	)		4,642		(268	)		30,404		(610	)
Other securities		1		—		—			2,844		(131	)		2,844		(131	)
Total		179	$	191,761	$	(2,441	)	$	427,243	$	(17,287	)	$	619,004	$	(19,728	)

			Less than 12 Months					12 Months or Longer					Total
December 31, 2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Held-to-maturity
Obligations of states, municipalities, and    political subdivisions		23	$	8,127	$	(58	)	$	8,792	$	(152	)	$	16,919	$	(210	)
Residential mortgage-backed securities
Agency		16		6,625		(150	)		21,139		(381	)		27,764		(531	)
Non-agency		7		21,499		(503	)		12,931		(416	)		34,430		(919	)
Total		46	$	36,251	$	(711	)	$	42,862	$	(949	)	$	79,113	$	(1,660	)

Certainsecuritieshave fairvalueslessthanamortizedcostand, therefore,containunrealizedlosses. TheCompany evaluatedthesecuritieswhich had an unrealizedlossfor other than temporary impairment and determined alldeclinesin valueto be temporary.Therewere 83 securities available-for-sale with unrealizedlossesat June 30, 2019. There were no securities held-to-maturity with unrealizedlossesat June 30, 2019.The Company anticipatesfullrecoveryof amortizedcostwith respectto thesesecuritiesby maturity,or sooner,in theeventof a morefavorablemarketinterestrate environment.The Company does not intendto sellthesesecuritiesand itisnot morelikelythannot thatthe Company willbe requiredto sellthembeforerecoveryof theiramortizedcostbasis,which maybe atmaturity.

The proceeds from all sales of securitiesavailable-for-sale,and theassociatedgainsand losses,for the three and six months ended June 30, 2019 and 2018 are listed below:

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Proceeds	$	59,594	$	544	$	59,594	$	544
Gross gains		1,049		4		1,049		4
Gross losses		76		—		76		—

There were $973,000 and $4,000 in net gains reclassified fromaccumulatedothercomprehensive incomeintoearnings for the three and six months ended June 30, 2019 and 2018, respectively.

Securities pledged at June 30, 2019 and December 31, 2018 had carrying amounts of $298.3 million and $244.7 million,respectively.At June 30, 2019 and December 31, 2018, of thosepledged,thecarryingamountsof securitiespledgedas collateralforpublicfund depositswere $250.0 million and $197.8 million,respectively, and forcustomerrepurchaseagreementsof $48.3 million and $46.9 million,respectively. At June 30, 2019 and December 31, 2018, there were no securities pledged for advances from the Federal Home Loan Bank. Othersecuritieswere pledgedforderivativepositions,lettersof creditand for purposesrequiredor permittedby law. At June 30, 2019 and December 31, 2018, therewere no holdingsof securitiesof any one issuer,otherthantheU.S.Governmentand itsagencies,in an amountgreaterthan10% of stockholders’ equity.

At June 30, 2019, theamortizedcostand fairvalueof debtsecuritiesareshown by contractual maturity.Expectedmaturitiesmaydifferfromcontractualmaturitiesifborrowershave therightto callor prepay obligationswith or withoutcallor prepaymentpenalties.Securitiesnot due ata singlematuritydateareshown separately. 

	Amortized Cost		Fair Value
Equity and other securities, at fair value
Due after ten years	$	695	$	695
No defined maturity		6,967		6,967
Total	$	7,662	$	7,662
Available-for-sale
Due in one year or less	$	76,144	$	76,267
Due from one to five years		143,846		145,125
Due from five to ten years		98,622		100,172
Due after ten years		45,130		45,801
Mortgage-backed securities		603,892		601,664
Total	$	967,634	$	969,029
Held-to-maturity
Due from one to five years	$	3,808	$	3,862
Due from five to ten years		613		626
Total	$	4,421	$	4,488

XML

Loan and Lease Receivables

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Loan and Lease Receivables

Note 5—Loanand Lease Receivables

Outstanding loan and lease receivables as of the dates shown were categorized as follows:

	June 30,			December 31,
	2019			2018
Commercial real estate	$	1,311,539		$	1,261,594
Residential real estate		777,762			704,899
Construction, land development, and other land		251,948			186,258
Commercial and industrial		1,320,338			1,145,240
Installment and other		12,909			13,675
Lease financing receivables		185,345			187,797
Total loans and leases		3,859,841			3,499,463
Net unamortized deferred fees and costs		232			(1,293	)
Initial direct costs		3,075			3,456
Allowance for loan and lease losses		(31,132	)		(25,201	)
Net loans and leases	$	3,832,016		$	3,476,425

	June 30,			December 31,
	2019			2018
Lease financing receivables
Net minimum lease payments	$	201,848		$	204,646
Unguaranteed residual values		1,442			1,535
Unearned income		(17,945	)		(18,384	)
Total lease financing receivables		185,345			187,797
Initial direct costs		3,075			3,456
Lease financial receivables before allowance for    lease losses	$	188,420		$	191,253

Total loans and leases consist of originated loans and leases, acquired impaired loans and acquired non-impaired loans and leases. At June 30, 2019 and December 31, 2018, total loans and leases included the guaranteed amount of U.S. government guaranteed loans of $145.5 million and $108.7 million, respectively. At June 30, 2019 and December 31, 2018, installment and other loans included overdraft deposits of $771,000 and $1.7 million, respectively, which were reclassified as loans. At June 30, 2019 and December 31, 2018, loans and loans held for sale pledged as security for borrowings were $1.5 billion and $1.4 billion.

The minimumannualleasepaymentsforleasefinancingreceivablesas of June 30, 2019 are summarizedas follows:

	Minimum Lease Payments
2019	$	37,931
2020		66,850
2021		47,648
2022		30,628
2023		15,308
Thereafter		3,483
Total	$	201,848

Originatedloansand leasesrepresentoriginations excluding loans initially acquired in a business combination. However, once an acquired non-impaired loan reaches its maturity date, and is re-underwritten and renewed, it is internally classified as an originated loan. Acquiredimpaired loansareloansacquiredfroma businesscombinationwith evidenceof creditqualitydeteriorationand are accountedforunderASC Topic 310-30. Acquirednon-impairedloansand leasesrepresentloansand leasesacquired froma businesscombinationwithoutevidenceof creditqualitydeteriorationand areaccountedforunderASC Topic 310-20. Leasesand revolvingloans do not qualify to be accounted for as acquired impaired loans and are accountedforunderASC Topic 310-20. The followingtablessummarizethebalancesforeachrespectiveloanand leasecategoryas of June 30, 2019 and December 31, 2018:

June 30, 2019	Originated		Acquired Impaired		Acquired Non- Impaired		Total
Commercial real estate	$	721,230	$	151,127	$	439,182	$	1,311,539
Residential real estate		501,038		118,534		158,190		777,762
Construction, land development, and other land		196,656		4,220		51,072		251,948
Commercial and industrial		992,313		20,370		307,887		1,320,570
Installment and other		10,937		300		1,672		12,909
Lease financing receivables		162,119		—		26,301		188,420
Total loans and leases	$	2,584,293	$	294,551	$	984,304	$	3,863,148

December 31, 2018	Originated		Acquired Impaired		Acquired Non- Impaired		Total
Commercial real estate	$	652,234	$	146,808	$	462,565	$	1,261,607
Residential real estate		466,309		113,934		124,659		704,902
Construction, land development, and other land		144,128		3,779		37,442		185,349
Commercial and industrial		803,508		12,617		328,672		1,144,797
Installment and other		11,718		404		1,596		13,718
Lease financing receivables		159,901		—		31,352		191,253
Total loans and leases	$	2,237,798	$	277,542	$	986,286	$	3,501,626

Acquired impaired loans—As part of the First Evanston acquisition, the Bank acquired impaired loans that are accounted for under ASC 310-30 in the amount of $25.0 million. As part of the Oak Park River Forest acquisition, the Bank acquired impaired loans in the amount of $48.6 million. Refer to Note 3—Acquisitions for additional information regarding the transaction.The following table presents a reconciliation of the undiscounted contractual cash flows, non-accretable difference, accretable yield, and fair value of acquired impaired loans as of the acquisition date of May 31, 2018 (First Evanston) and April 30, 2019 (Oak Park River Forest):

	First Evanston			Oak Park River Forest
Undiscounted contractual cash flows	$	33,594		$	65,223
Undiscounted cash flows not expected to be collected (non-accretable difference)		(5,003	)		(8,158	)
Undiscounted cash flows expected to be collected		28,591			57,065
Accretable yield at acquisition		(3,566	)		(8,501	)
Estimated fair value of impaired loans acquired at acquisition	$	25,025		$	48,564

The outstandingbalanceand carryingamountof allacquiredimpairedloansaresummarizedbelow. The balancesdo not includean allowanceforloanand leaselossesof $3.5 million and $2.7 million,at June 30, 2019 and December 31, 2018, respectively.

	June 30, 2019				December 31, 2018
	Outstanding Balance		Carrying Value		Outstanding Balance		Carrying Value
Commercial real estate	$	205,109	$	151,127	$	216,137	$	146,808
Residential real estate		169,171		118,534		173,962		113,934
Construction, land development, and other land		13,348		4,220		11,962		3,779
Commercial and industrial		30,041		20,370		24,972		12,617
Installment and other		1,131		300		1,735		404
Total acquired impaired loans	$	418,800	$	294,551	$	428,768	$	277,542

The following table summarizes the changes in accretable yield for acquired impaired loans for the three and six months ended June 30, 2019 and 2018: 

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Beginning balance	$	29,340		$	39,300		$	37,115		$	36,446
Additions		8,501			3,566			8,501			3,566
Accretion to interest income		(5,996	)		(5,871	)		(11,245	)		(11,562	)
Reclassification from nonaccretable difference, net		14,693			4,311			12,167			12,856
Ending balance	$	46,538		$	41,306		$	46,538		$	41,306

Acquired non-impaired loans and leases—The Company acquired non-impaired loans as part of the First Evanston acquisition in the amount of $891.0 million. The Company acquired non-impaired loans as part of the Oak Park River Forest acquisition in the amount of $212.6 million. Refer to Note 3—Acquisitions for additional information regarding the transaction.

The unpaidprincipalbalanceand carryingvalueforacquirednon-impairedloansand leasesat June 30, 2019 and December 31, 2018 were as follows:

	June 30, 2019				December 31, 2018
	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
Commercial real estate	$	449,734	$	439,182	$	473,262	$	462,565
Residential real estate		160,844		158,190		127,478		124,659
Construction, land development, and other land		52,459		51,072		38,494		37,442
Commercial and industrial		317,902		307,887		344,879		328,672
Installment and other		1,714		1,672		1,831		1,596
Lease financing receivables		27,958		26,301		32,977		31,352
Total acquired non-impaired loans and leases	$	1,010,611	$	984,304	$	1,018,921	$	986,286

XML

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments

Note 6—Allowance forLoanand Lease Losses and ReserveforUnfundedCommitments

Loans and leasesconsideredforinclusionin theallowanceforloanand leaselossesincludeacquired non-impairedloansand leases,thoseacquiredimpairedloanswith creditdeteriorationafteracquisition,and originatedloansand leases.Although allacquiredloansand leasesareincludedin the followingtable,only thosewith creditdeteriorationsubsequentto acquisitiondateareactuallyincludedin the allowanceforloanand leaselosses.

The followingtablessummarizethebalanceand activitywithintheallowanceforloanand leaselosses, thecomponentsof theallowanceforloanand leaselossesin termsof loansand leasesindividuallyand collectivelyevaluatedforimpairment,and correspondingloanand leasebalancesby typefor the three and six months ended June 30, 2019 and 2018 are as follows:

June 30, 2019	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land		Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Allowance for loan and lease losses
Three months ended
Beginning balance	$	6,660		$	1,970		$	536	$	15,630		$	63		$	2,247		$	27,106
Provisions		2,695			(62	)		155		3,320			8			275			6,391
Charge-offs		(818	)		(9	)		—		(1,827	)		(4	)		(622	)		(3,280	)
Recoveries		397			272			—		3			—			243			915
Ending balance	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132
Six months ended
Beginning balance	$	7,540		$	1,751		$	466	$	12,932		$	49		$	2,463		$	25,201
Provisions		3,137			156			225		6,352			22			498			10,390
Charge-offs		(2,169	)		(9	)		—		(2,179	)		(4	)		(1,267	)		(5,628	)
Recoveries		426			273			—		21			—			449			1,169
Ending balance	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132
Ending balance:
Individually evaluated for    impairment	$	2,775		$	22		$	—	$	6,489		$	—		$	—		$	9,286
Collectively evaluated for    impairment		4,433			1,559			676		9,495			65			2,143			18,371
Loans acquired with deteriorated    credit quality		1,726			590			15		1,142			2			—			3,475
Total allowance for loan and lease    losses	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132

June 30, 2019	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Loans and leases ending balance:
Individually evaluated for    impairment	$	18,707	$	2,899	$	—	$	24,278	$	—	$	—	$	45,884
Collectively evaluated for    impairment		1,141,705		656,329		247,728		1,275,922		12,609		188,420		3,522,713
Loans acquired with deteriorated    credit quality		151,127		118,534		4,220		20,370		300		—		294,551
Total loans and leases	$	1,311,539	$	777,762	$	251,948	$	1,320,570	$	12,909	$	188,420	$	3,863,148

June 30, 2018	Commercial Real Estate			Residential Real Estate		Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Allowance for loan and lease losses
Three months ended
Beginning balance	$	5,319		$	1,564	$	201		$	7,763		$	61		$	2,732		$	17,640
Provisions		1,336			84		131			1,956			1			448			3,956
Charge-offs		(202	)		—		—			(1,596	)		(32	)		(555	)		(2,385	)
Recoveries		—			—		—			246			—			230			476
Ending balance	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687
Six months ended
Beginning balance	$	4,794		$	1,638	$	222		$	7,418		$	41		$	2,593		$	16,706
Provisions		2,270			10		528			5,380			21			862			9,071
Charge-offs		(611	)		—		(418	)		(4,681	)		(32	)		(1,065	)		(6,807	)
Recoveries		—			—		—			252			—			465			717
Ending balance	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687
Ending balance:
Individually evaluated for    impairment	$	2,199		$	127	$	—		$	2,555		$	14		$	—		$	4,895
Collectively evaluated for    impairment		2,752			1,171		310			4,940			13			2,855			12,041
Loans acquired with deteriorated    credit quality		1,502			350		22			874			3			—			2,751
Total allowance for loan and lease    losses	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687

June 30, 2018	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Loans and leases ending balance:
Individually evaluated for    impairment	$	16,397	$	2,273	$	—	$	14,889	$	14	$	—	$	33,573
Collectively evaluated for    impairment		1,055,969		567,578		183,756		995,584		12,271		186,875		3,002,033
Loans acquired with deteriorated    credit quality		162,621		129,737		4,860		15,347		521		—		313,086
Total loans and leases	$	1,234,987	$	699,588	$	188,616	$	1,025,820	$	12,806	$	186,875	$	3,348,692

The Company increased the allowance for loan and lease losses by $4.0 million and $5.9 million for the three and six months ended June 30, 2019, respectively. The Company increased the allowance for loan and lease losses by $2.0 million and $3.0 million for the three and six months ended June 30, 2018, respectively. For acquired impaired loans, the Company increased the allowance for loan and lease losses by $629,000 and $740,000 for the three and six months ended June 30, 2019, respectively. The Company decreased the allowance for loans and lease losses for acquired impaired loans by $778,000 and $1.1 million for the three and six months ended June 30, 2018, respectively.

For loans individually evaluated for impairment, the Company increased the allowance for loan and lease losses by $1.7 million and $2.6 million for the three and six months ended June 30, 2019, respectively. The Company increased the allowance for loan and lease losses by $193,000 and $930,000 for the three and six months ended June 30, 2018, respectively. For loans collectively evaluated for impairment, the Company increased the allowance for loan and lease losses by $1.7 million and $2.6 million for the three and six months ended June 30, 2019, respectively. The Company increased the allowance for loan and lease losses by $2.6 million and $3.2 million for the three and six months ended June 30, 2018, respectively.

The followingtablessummarizetherecordedinvestment,unpaidprincipalbalance, and relatedallowanceforloansand leasesconsideredimpaired as of June 30, 2019 and December 31, 2018, which excludes acquired impaired loans:

June 30, 2019	Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded
Commercial real estate	$	8,286	$	11,436	$	—
Residential real estate		2,688		2,742		—
Commercial and industrial		11,873		15,319		—
With an allowance recorded
Commercial real estate		10,421		11,024		2,775
Residential real estate		211		237		22
Commercial and industrial		12,405		13,407		6,489
Total impaired loans	$	45,884	$	54,165	$	9,286

December 31, 2018	Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded
Commercial real estate	$	6,110	$	7,693	$	—
Residential real estate		1,886		1,858		—
Commercial and industrial		11,193		13,961		—
With an allowance recorded
Commercial real estate		5,873		6,313		2,191
Residential real estate		251		253		61
Commercial and industrial		10,601		11,153		4,397
Total impaired loans	$	35,914	$	41,231	$	6,649

The following tables summarize the average recorded investment and interest income recognized for loans and leases considered impaired, which excludes acquired impaired loans, for the six months ended as follows:

June 30, 2019	Average Recorded Investment		Interest Income Recognized
With no related allowance recorded
Commercial real estate	$	8,094	$	187
Residential real estate		1,785		27
Commercial and industrial		11,583		223
With an allowance recorded
Commercial real estate		6,793		155
Residential real estate		219		4
Commercial and industrial		12,043		247
Total impaired loans	$	40,517	$	843

June 30, 2018	Average Recorded Investment		Interest Income Recognized
With no related allowance recorded
Commercial real estate	$	10,013	$	436
Residential real estate		1,959		25
Commercial and industrial		7,283		99
With an allowance recorded
Commercial real estate		4,587		183
Residential real estate		347		3
Commercial and industrial		8,784		233
Installment and other		14		979
Total impaired loans	$	32,987	$	1,958

For purposesof thesetables,theunpaidprincipalbalancerepresentstheoutstandingcontractualbalance. Impairedloansincludeloansthatareindividuallyevaluatedforimpairmentas wellas troubleddebt restructuringsforallloancategories.The sumof non-accrualloansand loanspastdue 90 days stillon accrual willdifferfromthetotalimpairedloanamount.

The followingtablessummarizetheriskratingcategoriesof theloansand leasesconsideredfor inclusionin theallowanceforloanand leaselossescalculation,excludingacquiredimpairedloans,as of June 30, 2019 and December 31, 2018:

June 30, 2019	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Pass	$	1,036,018	$	620,414	$	217,408	$	1,068,796	$	12,565	$	184,922	$	3,140,123
Watch		87,111		32,703		30,320		152,953		38		28		303,153
Special Mention		16,837		3,581		—		48,567		—		2,295		71,280
Substandard		20,446		2,530		—		29,884		6		319		53,185
Doubtful		—		—		—		—		—		856		856
Loss		—		—		—		—		—		—		—
Total	$	1,160,412	$	659,228	$	247,728	$	1,300,200	$	12,609	$	188,420	$	3,568,597

December 31, 2018	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Pass	$	1,009,041	$	553,665	$	147,123	$	962,291	$	9,997	$	188,314	$	2,870,431
Watch		76,276		29,522		31,376		112,996		3,302		80		253,552
Special Mention		17,602		5,656		3,071		34,314		—		1,794		62,437
Substandard		11,880		2,125		—		22,579		15		818		37,417
Doubtful		—		—		—		—		—		247		247
Loss		—		—		—		—		—		—		—
Total	$	1,114,799	$	590,968	$	181,570	$	1,132,180	$	13,314	$	191,253	$	3,224,084

The following tables summarize contractual delinquency information for acquired non-impaired and originated loans and leases by category at June 30, 2019 and December 31, 2018:

June 30, 2019	30-59 Days Past Due		60-89 Days Past Due		Greater than 90 Days and Accruing		Non- accrual		Total Past Due		Current		Total
Commercial real estate	$	4,261	$	3,665	$	996	$	12,220	$	21,142	$	1,139,270	$	1,160,412
Residential real estate		1,311		—		—		2,335		3,646		655,582		659,228
Construction, land development, and    other land		—		—		—		—		—		247,728		247,728
Commercial and industrial		4,387		1,943		—		18,610		24,940		1,275,260		1,300,200
Installment and other		88		50		—		6		144		12,465		12,609
Lease financing receivables		845		319		—		856		2,020		186,400		188,420
Total	$	10,892	$	5,977	$	996	$	34,027	$	51,892	$	3,516,705	$	3,568,597

December 31, 2018	30-59 Days Past Due		60-89 Days Past Due		Greater than 90 Days and Accruing		Non- accrual		Total Past Due		Current		Total
Commercial real estate	$	6,659	$	2,145	$	—	$	9,484	$	18,288	$	1,096,511	$	1,114,799
Residential real estate		4,488		711		—		1,815		7,014		583,954		590,968
Construction, land development, and    other land		—		—		—		—		—		181,570		181,570
Commercial and industrial		5,829		1,376		—		13,932		21,137		1,111,043		1,132,180
Installment and other		1,932		4		—		12		1,948		11,366		13,314
Lease financing receivables		789		530		—		591		1,910		189,343		191,253
Total	$	19,697	$	4,766	$	—	$	25,834	$	50,297	$	3,173,787	$	3,224,084

Trouble debt restructurings are granted due to borrower financial difficulty and provide for a modification of loan repayment terms. TDRs are treated in the same manner as impaired loans for purposes of calculating the allowance for loan and lease losses. The tables below present TDRs by loan category as of June 30, 2019 and December 31, 2018:

June 30, 2019	Number of Loans		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Charge-offs		Specific Reserves
Accruing:
Commercial real estate		3	$	1,105	$	1,105	$	—	$	198
Commercial and industrial		2		214		214		—		126
Residential real estate		2		210		210		—		—
Total accruing		7		1,529		1,529		—		324
Non-accruing:
Commercial real estate		10		3,465		2,970		495		253
Commercial and industrial		8		6,735		4,864		1,871		1,278
Total non-accruing		18		10,200		7,834		2,366		1,531
Total troubled debt restructurings		25	$	11,729	$	9,363	$	2,366	$	1,855

December 31, 2018	Number of Loans		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Charge-offs		Specific Reserves
Accruing:
Commercial real estate		4	$	1,508	$	1,508	$	—	$	113
Commercial and industrial		2		191		191		—		100
Residential real estate		1		114		114		—		—
Total accruing		7		1,813		1,813		—		213
Non-accruing:
Commercial real estate		9		2,512		2,471		41		743
Commercial and industrial		6		6,714		4,843		1,871		1,290
Total non-accruing		15		9,226		7,314		1,912		2,033
Total troubled debt restructurings		22	$	11,039	$	9,127	$	1,912	$	2,246

In addition,therewas a $500,000 commitment outstanding on troubled debt restructurings at June 30, 2019 and December 31, 2018.

Loans modifiedas troubleddebtrestructuringsthatoccurredduringthe three and six months ended June 30, 2019 and 2018:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Accruing:
Beginning balance	$	1,921		$	1,037		$	1,813		$	1,061
Additions		—			37			113			37
Net payments		(44	)		(24	)		(49	)		(48	)
Net transfers from (to) non-accrual		(348	)		188			(348	)		188
Ending balance		1,529			1,238			1,529			1,238
Non-accruing:
Beginning balance		7,119			1,093			7,314			1,569
Additions		1,182			5,332			1,428			5,332
Net payments		(815	)		(461	)		(726	)		(793	)
Charge-offs		—			—			(530	)		(144	)
Net transfers from (to) accrual		348			(188	)		348			(188	)
Ending balance		7,834			5,776			7,834			5,776
Total troubled debt restructurings		9,363			7,014			9,363			7,014

Troubled debt restructurings that subsequently defaulted within twelve months of the restructure date during the three and six months ended June 30, 2019 and 2018 had a recorded investment of $348,000 and $340,000, respectively.

At June 30, 2019 and December 31, 2018, thereserveforunfundedcommitmentswas $1.3 million and $1.2 million, respectively. During the three and six months ended June 30, 2019, the provision forunfundedcommitments was $183,000 and $28,000, respectively. During the three and six months ended June 30, 2018, the credit to and provision for unfunded commitments was $29,000 and $84,000, respectively. Therewere no charge-offsor recoveriesrelatedto thereservefor unfundedcommitmentsduringthe periods.

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Servicing Assets

6 Months Ended

Jun. 30, 2019

Transfers And Servicing [Abstract]

Servicing Assets

Note 7—ServicingAssets

Activityforservicingassetsand therelatedchangesin fairvalue for the three and six months ended June 30, 2019 and 2018 is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Beginning balance	$	19,534		$	21,615		$	19,693		$	21,400
Additions, net		1,449			2,046			2,551			4,148
Changes in fair value		(1,223	)		(2,074	)		(2,484	)		(3,961	)
Ending balance	$	19,760		$	21,587		$	19,760		$	21,587

Loans servicedforothersarenot includedin theConsolidatedStatementsof FinancialCondition.The unpaidprincipalbalancesof theseloansservicedforothers as of June 30, 2019 and December 31, 2018 were as follows:

	June 30,		December 31,
	2019		2018
Loan portfolios serviced for:
SBA guaranteed loans	$	1,174,929	$	1,151,915
USDA guaranteed loans		106,758		106,184
Total	$	1,281,687	$	1,258,099

Loan servicing revenue totaled $2.6 and $2.5 million for the three months ended June 30, 2019 and 2018, respectively. Loan servicing revenue totaled $5.2 and $5.0 million for the six months ended June 30, 2019 and 2018, respectively. Loan servicing asset revaluation, which represents the changes in fair value of servicing assets, resulted in downward valuations of $1.2 and $2.1 million for the three months ended June 30, 2019 and 2018, respectively. Loan servicing asset revaluation resulted in downward valuations of $2.5 and $4.0 million for the six months ended June 30, 2019 and 2018, respectively.

The fairvalueof servicingrightsishighlysensitiveto changesin underlyingassumptions.Changes in prepaymentspeedassumptionshave themostsignificantimpacton thefairvalueof servicingrights.

Generally, as interest rates rise on variable rate loans, loan prepayments increase due to an increase in refinance activity, which may result in a decrease in the fair value of servicing assets. Measurement of fair value is limited to the conditions existing and the assumptions used as of a particular point in time, and those assumptions may change over time. Refer to Note 16—Fair Value Measurement for further details.

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Other Real Estate Owned

6 Months Ended

Jun. 30, 2019

Banking And Thrift [Abstract]

Other Real Estate Owned

Note 8—Other Real Estate Owned

The following table presents the change in other real estate owned (“OREO”) for the three and six months ended June 30, 2019 and 2018:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Beginning balance	$	4,799		$	10,466		$	5,314		$	10,626
Acquisitions of OREO through business    combination		2,201			—			2,201			—
Net additions to OREO		1,846			176			2,076			1,220
Proceeds from sales of OREO		(703	)		(3,859	)		(1,331	)		(5,122	)
Gains (losses) on sales of OREO		6			(249	)		(27	)		(109	)
Valuation adjustments		(79	)		(132	)		(163	)		(213	)
Ending balance	$	8,070		$	6,402		$	8,070		$	6,402

At June 30, 2019 and December 31, 2018, the balance of real estate owned included $649,000 and $838,000, respectively, of foreclosed residential real estate properties recorded as a result of obtaining physical possession of the property.

At June 30, 2019 and December 31, 2018, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process is $1.9 million and $2.3 million, respectively.

Proceeds from sales of OREO include proceeds from internally financed sales of OREO of $183,000 for the six months ended June 30, 2019. There were no internally financed sales of OREO for the three months ended June 30, 2019. Proceeds from internally financed sales of OREO were $444,000 for the three and six months ended June 30, 2018.

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Goodwill, Core Deposit Intangible and Other Intangible Assets

6 Months Ended

Jun. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill, Core Deposit Intangible and Other Intangible Assets

Note 9—Goodwill, Core Deposit Intangible and Other Intangible Assets

The following tables summarize the changes in the Company’s goodwill, core deposit intangible assets, and customer relationship intangible assets for the three and six months ended June 30, 2019 and 2018:  

	Six Months Ended June 30,
	2019								2018
	Goodwill		CoreDeposit Intangible			Customer Relationship Intangible			Goodwill		CoreDeposit Intangible			Customer Relationship Intangible
Beginning balance	$	128,177	$	30,360		$	3,059		$	54,562	$	16,720		$	—
Additions		17,461		6,220			—			72,974		19,060			3,216
Amortization		—		(3,598	)		(133	)		—		(1,863	)		(22	)
Ending balance	$	145,638	$	32,982		$	2,926		$	127,536	$	33,917		$	3,194
Accumulated amortization	N/A		$	22,484		$	290		N/A		$	15,329		22
Weighted average remaining    amortization period	N/A		7.0 Years			10.9 Years			N/A		7.4 Years			11.9 Years

	Three Months Ended June 30,
	2019								2018
	Goodwill		CoreDeposit Intangible			Customer Relationship Intangible			Goodwill		CoreDeposit Intangible			Customer Relationship Intangible
Beginning balance	$	128,177	$	28,654		$	2,992		$	54,562	$	15,959		$	—
Additions		17,461	$	6,220			—			72,974		19,060			3,216
Amortization		—		(1,892	)		(66	)		—		(1,102	)		(22	)
Ending balance	$	145,638	$	32,982		$	2,926		$	127,536	$	33,917		$	3,194
Accumulated amortization	N/A		$	22,484		$	290		N/A		$	15,329		22
Weighted average remaining    amortization period	N/A		7.0 Years			10.9 Years			N/A		7.4 Years			11.9 Years

The Company added additional goodwill, core deposit intangible assets, and customer relationship intangible assets in conjunction with the Oak Park River Forest and First Evanston acquisitions. Please refer to Note 3—Acquisitions for further details.

The following table presents the estimated amortization expense for core deposit intangible, customer relationship intangible, and other intangible assets recognized at June 30, 2019:

	Estimated Amortization
2019	$	4,006
2020		7,571
2021		6,997
2022		6,426
2023		4,370
Thereafter		6,538
Total	$	35,908

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Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Note 10—IncomeTaxes

The Company uses an estimated annual effective tax rate method in computing its interim tax provision. This effective tax rate is based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates.

The effective tax rate for the six months ended June 30, 2019 and 2018 was 27.7% and 20.0%, respectively. The Company recorded discrete income tax benefit of $65,000 and $211,000 related to the exercise of stock options and vesting of restricted shares for the six months ended June 30, 2019 and 2018, respectively. The current effective tax rate reflects the passage of the Tax Cuts and Jobs Act (the “Tax Act”), which was enacted on December 22, 2017. Among other things, the Tax Act reduces the corporate federal income tax rate from 35% to 21%, effective January 1, 2018. Also on December 22, 2017, the SEC issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the Tax Act’s impact. SAB 118 provides a measurement period, not to extend beyond one year from the date of enactment during which a company, acting in good faith, may complete the accounting for the impacts of the Tax Act. The Company recorded an additional discrete income tax benefit of $724,000 during the first quarter of 2018. This adjustment includes the impact of the federal income tax rate decrease due to the Tax Act (enacted on December 22, 2017) on our net deferred tax assets.

Net deferred tax assets increased to$35.7 million at June 30, 2019 compared to $35.6 million at December 31, 2018. The net increase in the total net deferred tax assets recorded as of June 30, 2019 was a result of $4.9 million in net deferred tax assets related to the acquisition of Oak Park River Forest, offset by a decrease in net deferred tax assets related to unrealized losses on available-for-sale securities and utilization of operating loss carryforwards during the period.

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Deposits

6 Months Ended

Jun. 30, 2019

Deposits [Abstract]

Deposits

Note 11—Deposits

The composition of deposits was as follows as of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Non-interest-bearing demand deposits	$	1,240,375	$	1,192,873
Interest-bearing checking accounts		345,081		296,339
Money market demand accounts		728,954		640,401
Other savings		480,756		476,418
Time deposits (below $250,000)		980,162		911,603
Time deposits ($250,000 and above)		284,915		232,282
Total deposits	$	4,060,243	$	3,749,916

Time deposits of $250,000 or more included $70.0 million and $50.0 million of brokered deposits at June 30, 2019 and December 31, 2018, respectively.

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Federal Home Loan Bank Advances

6 Months Ended

Jun. 30, 2019

Federal Home Loan Banks [Abstract]

Federal Home Loan Bank Advances

Note 12—FederalHomeLoanBankAdvances

The followingtablesummarizestheFHLBadvancesas of June 30, 2019 and December 31, 2018: 

	June 30,			December 31,
	2019			2018
Federal Home Loan Bank advances	$	500,000		$	425,000
Weighted average cost		2.42	%		2.56	%

At June 30, 2019, fixed-rate advances totaled $500.0 million with interest rates ranging from 2.40% to 2.45%and maturities ranging from July 2019 to September 2019.The Company’sadvancesfromtheFHLBarecollateralizedby residentialrealestateloan, commercial real estate loans, and securities. The Company’s required investment in FHLB stock is $4.50 for every $100 in advances. At June 30, 2019 and December 31, 2018, the Bank has additional borrowing capacity from the FHLB of $1.2 billion and $1.3 billion, respectively, subject to the availability of proper collateral. The Bank’s maximumborrowingcapacityislimitedto 35% of totalassets.

The Company hedgesinterestrateson borrowedfundsusinginterestrateswaps throughwhich the Company receivesvariableamountsand pays fixedamounts.Referto Note 17—DerivativeInstrumentsand Hedging Activitiesforadditionalinformation.

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Other Borrowings

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Other Borrowings

Note 13—Other Borrowings

The following is a summary of the Company’s other borrowings as of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Securities sold under agreements to repurchase	$	32,885	$	34,166
Line of credit		—		—
Total	$	32,885	$	34,166

Securitiessoldunderagreementsto repurchaserepresenta demanddepositproductofferedto customers thatsweep balancesin excessof theFDICinsurancelimitintoovernightrepurchaseagreements.The Company pledgessecuritiesas collateralfortherepurchaseagreements.Referto Note 4—Securitiesforadditional discussion.

OnOctober13,2016,theCompany enteredintoa$30.0million creditagreementwitha correspondent bank.In April 2017, the revolving line of credit was amended to a non-revolving line of credit as long as the outstanding balance exceeds $5.0 million. When the outstanding balance is reduced to $5.0 million, the line of credit will be converted to a revolving line of credit with credit availability up to $5.0 million until maturity. In July 2017, the Company repaid the outstanding balance, in full, under this line of credit of $16.2 million with proceeds from its initial public offering (“IPO”). The line of credit matured on October 11, 2018 and carried an interest rate at either the London Interbank Offered Rate (“LIBOR”) plus 250 basis points or the Prime Rate minus 25 basis points, based on the Company’s election. On October 11, 2018, the Company entered into a third amendment to the revolving credit agreement, which increased the revolving loan commitment to $10.0 million, extended the maturity of the credit facility to October 10, 2019, and makes certain other changes, including a release of the previously executed Stock Pledge Agreement dated October 13, 2016 and execution of a Negative Pledge Agreement dated October 11, 2018. The amended revolving line of credit bears interest at either the LIBOR plus 225 basis points or the Prime Rate minus 50 basis points, based on the Company’s election, which is required to be communicated at least three business days prior to the commencement of an interest period. If the Company fails to provide timely notification, the interest rate will be Prime Rate minus 50 basis points. At June 30, 2019 and December 31, 2018, the line of credit had no outstanding balance, therefore an interest rate option has not been selected.

On April 30, 2019, the Company drew on the line of credit for $5.7 million and selected the LIBOR plus 225 basis points interest rate option. The funds were utilized to repay a line of credit assumed as a result of the Oak Park River Forest acquisition. The Company repaid the $5.7 million outstanding balance of the line of credit in full on May 31, 2019.

The followingtablepresentsshort-termcreditlinesavailableforuse, forwhich theCompany did not have an outstandingbalanceas of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Federal Reserve Bank of Chicago discount window line	$	278,816	$	293,613
Available federal funds lines		105,000		55,000

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Junior Subordinated Debentures

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Junior Subordinated Debentures

Note 14—Junior Subordinated Debentures

At June 30, 2019 and December 31, 2018, theCompany’sjuniorsubordinateddebenturesby issuancewere as follows:

Name of Trust	Aggregate Principal Amount June 30, 2019			Aggregate Principal Amount December 31, 2018			Stated Maturity	Contractual Rate at June 30, 2019			Interest Rate Spread
MetropolitanStatutory Trust 1	$	35,000		$	35,000		March17, 2034		5.20	%	Three-month LIBOR + 2.79%
RidgeStone Capital Trust I		1,500			1,500		June 30, 2033		6.38	%	Five-year LIBOR + 3.50%
First Evanston Bancorp Trust I		10,000			10,000		March 15, 2035		4.19	%	Three-month LIBOR + 1.78%
Total liability, at par		46,500			46,500
Discount		(9,441	)		(9,732	)
Total liability, at carrying value	$	37,059		$	36,768

In 2004, theCompany’spredecessor,MetropolitanBank Group, Inc.,issued$35.0 millionfloatingrate juniorsubordinateddebenturesto MetropolitanStatutoryTrust1, which was formedfortheissuanceof trust preferredsecurities.The debenturesbearinterestatthree-month LIBOR plus 2.79% (5.20%and 5.58% atJune 30, 2019 and December 31, 2018, respectively).Interestispayablequarterly.The Company has therightto redeemthedebentures,in whole or in part,on any interestpaymentdateon or after March2009. Accruedinterestpayablewas $73,000 and $84,000 as of June 30, 2019 and December 31, 2018, respectively.

As part of the Ridgestone acquisition, the Company assumed the obligations to RidgeStone Capital Trust I of $1.5 million in principal amount, which was formed for the issuance of trust preferred securities. Beginning on June 30, 2008, the interest rate reset to the five-year LIBOR plus 3.50% (6.38% at June 30, 2019 and December 31, 2018), which is in effect until June 30, 2023 and updated every five years. Interest is paid on a quarterly basis. The Company has the right to redeem the debentures, in whole or in part, on any interest payment date on or after June 30, 2008.There was no accrued interest payable as of June 30, 2019 or December 31, 2018.

As part of the First Evanston acquisition, the Company assumed the obligations to First Evanston Bancorp Trust I of $10.0 million in principal amount, which was formed for the issuance of trust preferred securities. Refer to Note 3—Acquisitions for additional information. Beginning on March 15, 2010, the interest rate reset to the three-month LIBOR plus 1.78% (4.19% and 4.57% at June 30, 2019 and December 31, 2018, respectively), which is in effect until the debentures mature in 2035. Interest is paid on a quarterly basis. The Company has the right to redeem the debentures, in whole or in part, on any interest payment date on or after March 2010. The Company has the option to defer interest payments on the debentures from time to time for a period not to exceed five consecutive years. Accruedinterestpayablewas $18,000 and $21,000 as of June 30, 2019 and December 31, 2018, respectively.

The Trustsarenot consolidatedwith theCompany. Accordingly,theCompany reportsthesubordinated debenturesheldby theTrustsas liabilities.The Company owns allof thecommonsecuritiesof eachtrust.The juniorsubordinateddebenturesqualify,and aretreatedas, Tier1 regulatorycapitalof theCompany subjectto regulatorylimitations.The trustpreferredsecuritiesissuedby eachtrustrankequallywith thecommonsecurities in rightof payment,exceptthatifan eventof defaultundertheindenturegoverningthenoteshas occurredand is continuing,thepreferredsecuritieswillrankseniorto thecommonsecuritiesin rightof payment.

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Commitments and Contingent Liabilities

6 Months Ended

Jun. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities

Note 15—Commitmentsand Contingent Liabilities

Legalcontingencies—Intheordinarycourseofbusiness,theCompanyandBankhavevarious outstandingcommitmentsandcontingentliabilitiesthatarenotrecognizedintheaccompanyingconsolidated financialstatements.Inaddition,theCompanymaybeadefendantincertainclaimsandlegalactionsarisinginthe ordinarycourseofbusiness.Intheopinionofmanagement,afterconsultationwithlegalcounsel,theultimate dispositionofthesemattersiscurrentlynotexpectedtohaveamaterialadverseeffectonthe Company’s Consolidated Financial Statements.

Operatingleasecommitments—The Company has enteredintovariousoperatingleaseagreements primarilyforfacilitiesand landon which bankingfacilitiesarelocated.Certainleaseagreementshave renewal optionsattheend of theoriginalleasetermand certainleaseagreementshave escalationclausesin therent payments.

The minimumannualrentalcommitmentsforoperatingleasessubsequentto June 30, 2019, exclusiveof taxesand othercharges,aresummarizedas follows:

	MinimumRental Commitments
2019	$	2,173
2020		4,042
2021		3,589
2022		2,017
2023		1,077
Thereafter		3,156
Total	$	16,054

The Company’srentalexpensesforthe six months ended June 30, 2019 and 2018 were $2.8 million. Rental expenses for the three months ended June 30, 2019 and 2018 were $1.5 million and $1.6 million, respectively. During the six months ended June 30, 2019 and 2018, theCompany received $370,000 and $346,000, respectively,in subleaseincomewhich isincludedin the ConsolidatedStatementsof Operationsas a reductionof occupancyexpense. Sublease income for the three months ended June 30, 2019 and 2018 was $190,000 and $175,000, respectively. The total amount of minimum rentals to be received in the future on these subleases is approximately $1.5 million, and the leases have contractual lives extending through 2025. In additionto theabove requiredleasepayments, the Company has contractualobligationsrelated primarilyto informationtechnologycontractsand othermaintenancecontracts. In June 2018, the Company accrued $8.1 million in data processing expense primarily related to contract termination with its core service provider in anticipation of a future system conversion. As of June 30, 2019, there was no remaining contract termination balance.

Commitmentsto extend credit—The Company ispartyto financialinstrumentswith off-balancesheetrisk in thenormalcourseof businessto meetthefinancingneedsof itscustomers.These financialinstrumentsinclude commitmentsto extendcreditand standbylettersof credit.Those instrumentsinvolve,to varyingdegrees, elementsof creditand interestrateriskin excessof theamountrecognizedin theConsolidatedStatementsof FinancialCondition.The contractualor notionalamountsof thoseinstrumentsreflecttheextentof involvement theCompany has in particularclassesof financialinstruments.

The Company’s exposureto creditlossin theeventof non-performanceby theotherpartyto thefinancial instrumentforcommitmentsto extendcreditand lettersof creditisrepresentedby thecontractualor notionalamountof thoseinstruments.The Company usesthesamecreditpoliciesin makingcommitmentsand conditionalobligationsas itdoes forfundedinstruments.The Company does not anticipateany materiallossesas a resultof thecommitmentsand lettersof credit.

The followingtablesummarizesthecontractor notionalamountof outstandingloanand lease commitmentsatJune 30, 2019 and December 31, 2018:

	June 30, 2019						December 31, 2018
	Fixed Rate		VariableRate		Total		FixedRate		VariableRate		Total
Commitments to extend credit	$	62,653	$	942,348	$	1,005,001	$	74,099	$	928,991	$	1,003,090
Letters of credit		3,607		35,519		39,126		1,982		34,071		36,053
Total	$	66,260	$	977,867	$	1,044,127	$	76,081	$	963,062	$	1,039,143

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amount does not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the counterparty. Collateral is primarily obtained in the form of commercial and residential real estate (including income producing commercial properties).

Lettersof creditareconditionalcommitmentsissuedby theCompany to guaranteeto a third-party theperformanceof a customer.Those guaranteesareprimarilyissuedto supportpublicand privateborrowing arrangements,bond financingand similartransactions.The creditriskinvolvedin issuinglettersof creditis essentiallythesameas thatinvolvedin extendingloanfacilitiesto customers.

Commitmentsto makeloansaregenerallymadeforperiodsof 90 days or less.The fixedrateloan commitmentshave interestratesrangingfrom2.48% to 15.00% and maturitiesup to 2042. Variablerateloan commitmentshave interestratesrangingfrom3.00% to 10.00% and maturitiesup to 2048.

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Fair Value Measurement

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

Note 16—Fair Value Measurement

Fairvalueistheexchangepricethatwould be receivedforan assetor paidto transfera liability(exit price)in theprincipalor mostadvantageousmarketfortheassetor liabilityin an orderlytransactionbetween marketparticipantson themeasurementdate.In addition,theCompany has theabilityto obtainfairvaluesfor marketsthatarenot accessible.

These typesof inputscreatethefollowingfairvaluehierarchy:

Level 1—Quoted pricesin activemarketsforidenticalassetsor liabilities.

Level 2—Quoted pricesforsimilarinstrumentsin activemarkets,quotedpricesforidenticalor similar instrumentsin marketsthatarenot activeand model-derivedvaluationswhose inputsareobservableor whose significantvaluedriversareobservable.

Level 3—Unobservableinputsthataresupportedby littleor no marketactivityand thataresignificant to thefairvalueof theassetor liability.Unobservableinputsareused to measurefairvalueto theextentthat observableinputsarenot available.The Company’sown dataused to developunobservableinputsmaybe adjustedformarketconsiderationswhen reasonablyavailable.

Thecategorizationwithinthevaluationhierarchyisbasedupon thelowestlevelof inputthatissignificantto thefairvaluemeasurement.The Company’sassessmentof thesignificanceof a particularinputto thefairvaluemeasurementin itsentiretyrequiresjudgment,and considersfactorsspecificto assetsand liabilities.

The Company used thefollowingmethodsand significantassumptionsto estimatefairvalueforcertain assetsmeasuredand carriedatfairvalueon a recurringbasis:

Securitiesavailable-for-sale—The Company obtainsfairvaluemeasurementsfroman independent pricingservice.Managementreviewstheproceduresused by thethirdparty,includingsignificantinputsused in thefairvaluecalculations.The fairvaluemeasurementsconsiderobservabledatathatmayincludedealerquotes, marketspreads,cashflows,theU.S.Treasuryyieldcurve,livetradinglevels,tradeexecutiondata,market consensusprepaymentspeeds,creditinformationand thebond’stermsand conditions,amongotherthings.When marketquotesarenot readilyaccessibleor available,alternativeapproachesareutilized,such as matrixor model pricing.

The Company’s methodology for pricing non-rated bonds focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated municipal bond, the Company references a publicly issued bond by the same issuer if available as well as other additional key metrics to support the credit worthiness. Typically, pricing for these types of bonds would require a higher yield than a similar rated bond from the same issuer. A reduction in price is applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one notch lower (i.e. a “AA” rating for a comparable bond would be reduced to “AA-” for the Company’s valuation). In 2019 and 2018, all of the ratings derived by the Company were “BBB” or better with and without comparable bond proxies. The fair value measurement of municipal bonds is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined, the Company obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets.

Equity and other securities—The Company utilizes the same fair value measurement methodology for equity and other securities as detailed in the securities available-sale portfolio above.

Servicingassets—Fairvalueisbasedon a loan-by-loanbasistakingintoconsiderationtheoriginalterm to maturity,thecurrentage of theloanand theremainingtermto maturity.The valuationmethodologyutilized fortheservicingassetsbeginswith generatingfuturecashflowsforeachservicingasset,basedon theirunique characteristicsand market-basedassumptionsforprepaymentspeeds.The presentvalueof thefuturecashflows arethencalculatedutilizingmarket-baseddiscountrateassumptions.

Derivativeinstruments—Interestratederivatives arevaluedby a thirdparty,usingmodelsthatprimarily use marketobservableinputs,such as yieldcurves,and arevalidatedby comparisonwith valuationsprovidedby therespectivecounterparties.Derivativefinancialinstrumentsareincludedin otherassetsand otherliabilitiesin theConsolidatedStatementsof FinancialCondition.

The followingtablessummarizetheCompany’sfinancialassetsand liabilitiesthatwere measuredatfair valueon a recurringbasisat June 30, 2019 and December 31, 2018:

			Fair Value Measurements Using
June 30, 2019	Fair Value		Level 1		Level 2		Level 3
Financial assets
Securities available-for-sale
U.S. Treasury Notes	$	45,830	$	45,830	$	—	$	—
U.S. Government agencies		177,706		—		177,706		—
Obligations of states, municipalities, and political    subdivisions		89,918		—		89,723		195
Mortgage-backed securities; residential
Agency		352,411		—		352,411		—
Non-Agency		94,490		—		94,490		—
Mortgage-backed securities; commercial
Agency		123,394		—		123,394		—
Non-Agency		31,369		—		31,369		—
Corporate securities		38,899		—		38,899		—
Other securities		15,012		—		15,012		—
Equity and other securities, at fair value
Mutual funds		2,924		2,924		—		—
Equity securities		4,738		—		4,043		695
Servicing assets		19,760		—		—		19,760
Derivative assets		9,168		—		9,168		—
Financial liabilities
Derivative liabilities		9,607		—		9,607		—

			Fair Value Measurements Using
December 31, 2018	Fair Value		Level 1		Level 2		Level 3
Financial assets
Securities available-for-sale
U.S. Treasury Notes	$	52,667	$	52,667	$	—	$	—
U.S. Government agencies		186,498		—		186,498		—
Obligations of states, municipalities, and political    subdivisions		60,233		—		60,038		195
Mortgage-backed securities; residential
Agency		272,963		—		272,963		—
Non-Agency		83,621		—		83,621		—
Mortgage-backed securities; commercial
Agency		90,434		—		90,434		—
Non-Agency		30,458		—		30,458		—
Corporate securities		34,173		—		34,173		—
Other securities		6,609		2,844		3,074		691
Servicing assets		19,693		—		—		19,693
Derivative assets		10,740		—		10,740		—
Financial liabilities
Derivative liabilities		4,243		—		4,243		—

TheCompany has originated, and acquired through a business combination,servicingassets classified as Level 3 of the fair value hierarchy. The Company acquired single-issuertrustpreferredsecurities includedin othersecuritiescategorizedas Level3 of thefairvaluehierarchy.

TheCompany has purchased, and acquired through a business combination,privately-issuedmunicipalsecuritiesthatare categorizedas Level3. These municipalsecuritiesarebonds issuedformunicipalgovernmententities locatedin theChicago metropolitan area and areprivatelyplaced,non-ratedbonds withoutCommittee on Uniform Security Identification Proceduresnumbers.

The Company did not have any transfersto or fromLevel 3 of thefairvaluehierarchyduringthe six months ended June 30, 2019 and 2018.

The following table presents additional information about financial assets measured at fair value on recurring basis for which the Company used significant unobservable inputs (Level 3):

	Six Months Ended June 30,
	2019		2018		2019			2018
	Investment Securities				Servicing Assets
Balance, beginning of period	$	886	$	1,052	$	19,693		$	21,400
Acquired assets at fair value		—		314		—			—
Additions, net		—		—		2,551			4,148
Amortization		3		3		—			—
Change in unrealized gain		1		11		—			—
Change in fair value		—		—		(2,484	)		(3,961	)
Balance, end of period	$	890	$	1,380	$	19,760		$	21,587

The followingtablepresentsadditionalinformationabouttheunobservableinputsused in thefairvalue measurementson recurringbasisthatwere categorizedwithinLevel3 of thefairvaluehierarchyas of June 30, 2019:

Financial Instruments	Valuation Technique	Unobservable Inputs	Range of Inputs	Weighted Average Range	Impact to Valuation from an Increased or Higher Input Value
Obligations of states,    municipalities, and    political obligations	Discountedcash flow	Probability of default	2.4%	2.4%	Decrease
Single issuer trust preferred	Discounted cash flow	Probability of default	4.9%—5.4%	5.9%	Decrease
Servicing assets	Discounted cash flow	Prepayment speeds	2.8%—20.0%	12.9%	Decrease
		Discount rate	6.4%—23.4%	13.5%	Decrease
		Expected weighted average loan life	0.1—10.0 years	4.7 years	Increase

The Company used thefollowingmethodsand significantassumptionsto estimatefairvalueforcertain assetsmeasuredand carriedatfairvalueon a non-recurringbasis:

Impairedloans (excludingacquired impairedloans)—Impairedloans,otherthanthoseexistingon thedateof a businessacquisition,areprimarilycarriedatthefairvalueof theunderlyingcollateral,less estimatedcoststo sell,iftheloaniscollateraldependent.Valuationsof impairedloansthatarecollateral dependentaresupportedby thirdpartyappraisalsin accordancewith theBank’s creditpolicy. Other valuation methods include analysis of discounted cash flows, which measures the present value of expected future cash flows discounted at the loan’s effective interest rate. Impairedloansthatarenot collateraldependentarenot material.

Assetsheld forsale—Assetsheldforsaleconsistof formerbranchlocations and real estate previouslypurchasedforexpansion.Assetsareconsideredheldforsalewhen managementhas approvedto sell theassetsfollowinga branchclosureor otherevents.The propertiesarebeingactivelymarketedand transferred to assetsheldforsalebasedon thelowerof carryingvalueor itsfairvalue,lessestimatedcoststo sell.

Otherrealestateowned—Certainassetsheldwithinotherrealestateowned representrealestateor othercollateralthathas been adjustedto itsestimatedfairvalue,lesscostto sell,as a resultof transferringfrom theloanportfolioatthetimeof foreclosureor repossessionand basedon management’speriodicimpairment evaluation.Fromtimeto time,non-recurringfairvalueadjustmentsto otherrealestateowned arerecordedto reflectpartialwrite-downsbasedon an observablemarketpriceor currentappraisedvalueof property.

Adjustmentsto fairvaluebasedon such non-recurringtransactionsgenerallyresultfromtheapplication of lower-of-cost-or-marketaccountingor write-downsof individualassetsdue to impairment.The following tablessummarizetheCompany’sassetsthatwere measuredatfairvalueon a non-recurringbasis,excluding acquiredimpairedloans,as of June 30, 2019 and December 31, 2018:

			Fair Value Measurements Using
June 30, 2019	Fair Value		Level 1		Level 2		Level 3
Non-recurring
Impaired loans
(excluding acquired impaired loans)
Commercial real estate	$	15,932	$	—	$	—	$	15,932
Residential real estate		2,877		—		—		2,877
Commercial and industrial		17,789		—		—		17,789
Assets held for sale		16,329		—		—		16,329
Other real estate owned		8,070		—		—		8,070

			Fair Value Measurements Using
December 31, 2018	Fair Value		Level 1		Level 2		Level 3
Non-recurring
Impaired loans
(excluding acquired impaired loans)
Commercial real estate	$	9,792	$	—	$	—	$	9,792
Residential real estate		2,076		—		—		2,076
Commercial and industrial		17,397		—		—		17,397
Assets held for sale		14,489		—		—		14,489
Other real estate owned		5,314		—		—		5,314

The followingmethodsand assumptionswere used by theCompany in estimatingfairvaluesof other assetsand liabilitiesfordisclosurepurposes:

Cash and cash equivalents—For theseshort-terminstruments,thecarryingamountisa reasonable estimateof fairvalue.

Securitiesheld-to-maturity—The Company obtainsfairvaluemeasurementsfroman independent pricingservice.Managementreviewstheproceduresused by thethirdparty,includingsignificantinputsused in thefairvaluecalculations.The fairvaluemeasurementsconsiderobservabledatathatmayincludedealerquotes, marketspreads,cashflows,theU.S.Treasuryyieldcurve,livetradinglevels,tradeexecutiondata,market consensusprepaymentspeeds,creditinformationand thebond’stermsand conditions,amongotherthings.When marketquotesarenot readilyaccessibleor available,alternativeapproachesareutilized,such as matrixor model pricing.

Restrictedstock—The fairvaluehas been determinedto approximatecost.

Loans held forsale—The fairvalueof loansheldforsalearebasedon quotedmarketprices,where available,and determinedby discountedestimatedcashflowsusinginterestratesapproximatingtheCompany’s currentoriginationratesforsimilarloansadjustedto reflecttheinherentcreditrisk.

Loanand leasereceivables,net—For certainvariablerateloansthatrepricefrequentlyand with no significantchangesin creditrisk,fairvalueisestimatedatcarryingvalue.The fairvalueof othertypesof loans is estimated using an exit price notion for 2019 values. It is estimatedby discountingfuturecashflows,usingcurrentratesatwhich similarloanswould be madeto borrowerswith similarcreditratingsand forthesameremainingmaturities.

Deposits—The fairvalueof demanddeposits,savingsaccounts,and certainmoneymarket depositsistheamountpayableon demandatthereportingdate.The fairvalueof fixed-maturitycertificatesof depositisestimatedby discountingfuturecashflows,usingratescurrentlyofferedfordepositsof similar remainingmaturities.

FederalHomeLoanBankadvances—The fairvalueof FHLBadvancesisestimatedby discounting theagreementsbasedon maturitiesusingratescurrentlyofferedforFHLBadvancesof similarremaining maturitiesadjustedforprepaymentpenaltiesthatwould be incurrediftheborrowingswere paidoffon the measurementdate.

Securitiessold under agreementsto repurchase—The carryingamountapproximatesfairvaluedue to  maturitiesof lessthanninetydays.

Junior subordinated debentures—The fairvalueof juniorsubordinateddebentures,in theformof trustpreferredsecurities,isdeterminedusingratescurrentlyavailableto theCompany fordebtwith similarterms and remainingmaturities.

Accrued interestreceivableand payable—The carryingamountapproximatesfairvalue.

Commitmentsto extend creditand lettersof credit—The fairvaluesof theseoff-balancesheetcommitmentsto extendcreditand commercialand lettersof creditarenot consideredpracticableto estimatebecauseof thelackof quotedmarketpricesand theinabilityto estimatefair valuewithoutincurringexcessivecosts.

The estimatedfairvaluesof financialinstruments not carried at fair value and levelswithinthefairvaluehierarchyareas follows:

			June 30,				December 31,
	Fair Value		2019				2018
	Hierarchy Level		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial assets
Cash and due from banks		1	$	57,513	$	57,513	$	30,190	$	30,190
Interest bearing deposits with other banks		2		31,802		31,802		91,670		91,670
Securities held-to-maturity		2		4,421		4,488		99,266		97,739
Other restricted stock		2		22,937		22,937		19,202		19,202
Loans held for sale		3		18,473		20,625		19,827		21,654
Loans and lease receivables, net (less impaired loans    at fair value(1)		3		3,795,418		3,702,441		3,447,160		3,407,652
Accrued interest receivable		3		12,913		12,913		10,863		10,863
Financial liabilities
Non-interest-bearing deposits		2		1,240,375		1,240,375		1,192,873		1,192,873
Interest-bearing deposits		2		2,819,868		2,828,014		2,557,043		2,554,329
Accrued interest payable		2		4,522		4,522		3,484		3,484
Line of credit		2		—		—		—		—
Federal Home Loan Bank advances		2		500,000		500,000		425,000		425,000
Securities sold under repurchase agreement		2		32,885		32,885		34,166		34,166
Junior subordinated debentures		3		37,059		42,310		36,768		42,351

(1) In accordance with the prospective adoption of ASU 2016-01, the fair value of loans and lease receivables, net (less impaired loans at fair value) as of June 30, 2019 was measured using an exit price notion. The fair value as of December 31, 2018 was measured using an entry price notion.

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Derivative Instruments and Hedge Activities

6 Months Ended

Jun. 30, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedge Activities

Note 17—Derivative Instruments and Hedge Activities

The Company recognizes derivative financial instruments at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Financial Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. The following tables present the fair value of the Company’s derivative financial instruments and classification on the Consolidated Statements of Financial Condition as of June 30, 2019 and December 31, 2018:

	June 30, 2019						December 31, 2018
			Fair Value						Fair Value
	Notional Amount		Other Assets		Other Liabilities		Notional Amount		Other Assets		Other Liabilities
Derivatives designated as hedging instruments
Interest rate swaps designated as cash     flow hedges	$	250,000	$	1,456	$	1,316	$	250,000	$	6,699	$	—
Derivatives not designated as hedging instruments
Other interest rate derivatives		286,798		7,712		8,280		294,545		4,041		4,237
Other credit derivatives		4,262		—		11		4,424		—		6
Total derivatives	$	541,060	$	9,168	$	9,607	$	548,969	$	10,740	$	4,243

Interest rate swaps designated as cash flow hedges—Cash flow hedges of interest payments associated with certain FHLB advances had notional amounts totaling $250.0 million as of June 30, 2019 and December 31, 2018. The Company assesses the effectiveness of each hedging relationship by comparing the changes in fair value of the derivative hedging instrument with the changes in fair value of the designated hedged transactions.

Interest recorded on these swap transactions reduced FHLB interest expense by $574,000and$374,000 during the three months ended June 30, 2019 and 2018, respectively, and is reported as a component of interest expense on FHLB advances.Interest recorded on these swap transactions reduced FHLB interest expense by $1.3 million and $435,000 during the six months ended June 30, 2019 and 2018, respectively. At June 30, 2019, the Company estimates $767,000 of the unrealized gain to be reclassified as a decrease to interest expense during the next twelve months.

The following table reflects the cash flow hedges as of June 30, 2019:

Notional amounts	$	250,000
Derivative assets fair value		1,456
Derivative liabilities fair value		—
Weighted average pay rates		1.67	%
Weighted average receive rates		2.61	%
Weighted average maturity	2.7 years

The following table reflects the net gains (losses) recorded in accumulated other comprehensive income (loss) and the Consolidated Statements of Operations relating to the cash flow derivative instruments for the six months ended: 

	June 30, 2019							June 30, 2018
	Amount of Loss Recognized in OCI			Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense		Amount of Gain (Loss) Recognized in Other Non-Interest Income		Amount of Gain Recognized in OCI		Amount of Gain Reclassified from OCI to Income as an Increase to Interest Expense		Amount of Gain (Loss) Recognized in Other Non-Interest Income
Interest rate swaps	$	(5,234	)	$	1,280	$	—	$	5,632	$	435	$	—

Other interest rate derivatives—The total combined notional amount was $286.8 million as of June 30, 2019 with maturities ranging from April 2020 to January 2030. The fair values of the interest rate derivative agreements are reflected in other assets and other liabilities with corresponding gains or losses reflected in non-interest income. During the three months ended June 30, 2019 and 2018, there were $392,000 and $946,000 of transaction fees, respectively, included in other non-interest income, related to these derivative instruments. During the six months ended June 30, 2019 and 2018, there were $717,000 and $946,000 of transaction fees, respectively, related to these derivative instruments.

The following table reflects other interest rate derivatives as of June 30, 2019:

Notional amounts	$	286,798
Derivative assets fair value		7,712
Derivative liabilities fair value		8,280
Weighted average pay rates		4.74	%
Weighted average receive rates		4.56	%
Weighted average maturity	7.0 years

Other credit derivatives—The total notional amount was $4.3 million and $4.4 million as of June 30, 2019 and December 31, 2018, respectively. The fair value of the other credit derivatives are reflected in other liabilities with corresponding gains or losses reflected in non-interest income. The credit valuation adjustment (“CVA”) related to the other credit derivatives resulted in a decrease to other non-interest income during the three months ended June 30, 2019 of $3,000, and an increase to other non-interest income during the three months ended June 30, 2018 of $1,000. There were no transaction fees included in non-interest income related to these derivative instruments during the three months ended June 30, 2019 and 2018. The CVA related to the other credit derivatives resulted in a decrease to other non-interest income during the six months ended June 30, 2019 and 2018 of $4,000 and $2,000, respectively. There were no transaction fees included in non-interest income related to these derivative instruments during the six months ended June 30, 2019, and there were $26,000 of transaction fees during the six months ended June 30, 2018.

The Company has entered into risk participation agreements with counterparty banks to assume a portion of the credit risk related to borrower transactions. The credit risk related to these other credit derivatives is managed through the Company’s loan underwriting process.

Credit risk—Derivative instruments are inherently subject to market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the Company’s risk of loss when the counterparty to a derivative contract fails to perform according to the terms of the agreement. Market and credit risks are managed and monitored as part of the Company’s overall asset-liability management process. The credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company’s loan underwriting process. The Company’s loan underwriting process also approves the Bank’s swap counterparty used to mirror the borrowers’ swap. The Company has a bilateral agreement with each swap counterparty that provides that fluctuations in derivative values are to be fully collateralized with either cash or securities. The CVA is a fair value adjustment to the derivative to account for this risk. During the three months ended June 30, 2019 and 2018, the CVA resulted in a decrease to non-interest income of $221,000 and $65,000, respectively. During the six months ended June 30, 2019 and 2018, the CVA resulted in a decrease to non-interest income of$372,000 and $38,000, respectively.

The Company has agreements with its derivative counterparties that contain a cross-default provision under which if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain derivative counterparties that contain a provision where if the Company fails to maintain its status as a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations resulted in a net asset position.

The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative asset and liabilities on the Consolidated Statements of Financial Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of: 

	June 30, 2019						December 31, 2018
	Derivative Assets Fair Value			Derivative Liabilities Fair Value			Derivative Assets Fair Value			Derivative Liabilities Fair Value
Gross amounts recognized	$	9,168		$	9,607		$	10,740		$	4,243
Less: Amounts offset in the Consolidated Statements of    Financial Condition		—			—			—			—
Net amount presented in the Consolidated Statements of    Financial Condition	$	9,168		$	9,607		$	10,740		$	4,243
Gross amounts not offset in the Consolidated Statements of    Financial Condition
Offsetting derivative positions		(1,478	)		(1,478	)		(2,823	)		(2,823	)
Collateral posted		(7,690	)		(8,129	)		(7,917	)		(1,317	)
Net credit exposure	$	—		$	—		$	—		$	103

For purposes of this disclosure, the amount of posted collateral by the counterparties is limited to the amount offsetting the derivative asset and derivative liability.

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Share-Based Compensation

6 Months Ended

Jun. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

Note 18 – Share-Based Compensation

In June 2017, the Company adopted the 2017 Omnibus Incentive Compensation Plan (the “Omnibus Plan”) in connection with our IPO. The Omnibus Plan provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalent rights and other equity-based, equity-related or cash-based awards. A total of 1,550,000 shares of our common stock have been reserved for issuance under the Omnibus Plan. As of June 30, 2019, there were 1,222,576 shares available for future grants under the Omnibus Plan.

On July 6, 2017, in conjunction with the completion of the IPO, the Company granted 58,900 restricted shares of the Company’s common stock to certain key employees, pursuant to the Omnibus Plan. The restricted shares will cliff vest on the third anniversary of the grant date, subject to continued employment. A total of 11,898 restricted shares were also granted during the year ended December 31, 2017 in connection with the recruitment of employees. These restricted shares vest ratably over a four year period.

During 2018, the Company granted 131,157 shares of restricted common stock, par value $0.01 per share. Of this total, 102,559 restricted shares will vest ratably over four years on each anniversary of the grant date, 15,165 restricted shares will vest ratably over three years on each anniversary of the grant date, and 2,268 restricted shares will vest on the first anniversary of the grant date, all subject to continued employment.

In addition, 11,165 performance-based restricted shares were included in the 2018 grant. The number of shares which may be earned under the award is dependent upon the Company’s return on average assets over a three-year period ending December 31, 2020, measured in 2018 against the Company’s internal targets and for 2019 and 2020 against a peer group consisting of publicly-traded bank holding companies ranging in asset size from 50% to 200% of the Company’s total assets. Under the award, 25% of the shares will be earned at threshold performance, 100% will be earned at target and 50th percentile performance, and up to 125% of the shares with above target and 75th percentile performance. Any earned performance shares will vest on the third anniversary of the grant date.

During 2019, the Company granted 141,207 shares of restricted common stock, par value $0.01 per share. Of this total, 98,574 restricted shares will vest ratably over four years on each anniversary of the grant date, 20,975 restricted shares will vest ratably over three years on each anniversary of the grant date, and 683 restricted shares will vest on the first anniversary of the grant date, all subject to continued employment.

In addition, 20,975 performance-based restricted shares were included in the 2019 grants. The number of shares which may be earned under the award is dependent upon the Company’s return on average assets, weighted equally, over a three-year period ending December 31, 2021, measured against a peer group consisting of publicly-traded bank holding companies. Results will be measured cumulatively at the end of the three years. Any earned shares will vest on the third anniversary of the grant date.

The following table discloses the changes in restricted shares for the six months ended June 30, 2019:

	Omnibus Plan
	Number of Shares			Weighted Average Grant Date Fair Value
Beginning balance, January 1, 2019		196,480		$	21.66
Granted		141,207			19.09
Vested		(35,889	)		22.07
Forfeited		(13,238	)		20.33
Ending balance outstanding at June 30, 2019		288,560		$	20.41

A total of 35,889 restricted shares vested during the six months ended June 30, 2019. The fair value of restricted shares that vested during the six months ended June 30, 2019 was $673,000. A total of 2,975 restricted shares vested during the year ended December 31, 2018. The fair value of restricted shares that vested during the year ended December 31, 2018 was $62,000.  

The Company recognizes share-based compensation based on the estimated fair value of the restricted stock at the grant date. Share-based compensation expense is included in non-interest expense in the Consolidated Statements of Operations.

The following table summarizes restricted stock compensation expense for the six months ended June 30, 2019 and 2018:

	Six Months Ended June 30,
	2019		2018
Total share-based compensation - restricted stock	$	807	$	326
Income tax benefit		225		91
Unrecognized compensation expense		4,829		3,691
Weighted-average amortization period remaining	3.0 years		3.3 years

The fair value of the unvested restricted stock awards at June 30, 2019 was $4.8 million.

The Company maintained a nonqualified, share-based, stock option plan adopted prior to recapitalization (“MBG Plan”). There were no options granted or exercised under this plan during the year ended December 31, 2017. At the time of the Company’s reincorporation in Delaware, in June 2017, the Board of Directors cancelled the MBG Plan and all the respective outstanding options were cancelled.

In October 2014, the Company adopted the Byline Bancorp, Inc. Equity Incentive Plan (“BYB Plan”). The maximum number of shares available for grants under this plan was 2,476,122 shares. During 2016 and 2015, the Company granted options to purchase 212,400 and 1,634,568 shares, respectively, under this plan. The Company did not grant any stock options during the year ended December 31, 2017. In June 2017, the Board of Directors terminated the BYB Plan and no future grants can be made under this plan. Options to purchase a total of 1,452,072 shares remain outstanding under the BYB Plan at June 30, 2019.

The types of stock options granted under the BYB Plan were Time Options and Performance Options. The exercise price of each option is equal to the fair value of the stock as of the date of grant. These option awards have vesting periods ranging from one to five years and have 10-year contractual terms. Stock volatility was computed as the average of the volatilities of peer group companies.  

The vesting of Time Options is conditional based on completion of service. Performance Options have conditional vesting based on either performance targets or market performance. Certain Performance Options’ performance goals will be satisfied (in whole or in part) if the Bank achieves various performance targets such as profitability, asset quality, and conditional based on market performance, as outlined in the BYB Plan. Each of the performance goals identified are measured for achievement (or failure to achieve) independent of each other. In October 2017, the Board of Directors determined that the Performance Option goals were satisfied, in whole, and these Performance Options converted to Time Options. As a result of the previous completion of service, 414,894 performance options vested on October 3, 2017.

The fair values of the stock options were determined using the Black-Scholes-Merton model for Time Options and a Monte Carlo simulation model for Performance Options.

The following table discloses the activity in shares subject to options and the weighted average exercise prices, in actual dollars, for the six months ended June 30, 2019:

	BYB Plan
	Number of Shares			Weighted Average Exercise Price		Intrinsic Value		Weighted Average Remaining Contractual Term (in Years)
Beginning balance, January 1, 2019		1,598,872		$	11.84	$	7,713		6.6
Exercised		(86,000	)		16.25	$	245
Forfeited		(60,800	)		16.25
Ending balance outstanding at    June 30, 2019		1,452,072		$	11.39	$	11,225		6.0
Exercisable at June 30, 2019		1,414,572		$	11.26	$	11,118		6.0

A total of 86,000 stock options were exercised during the six months ended June 30, 2019. During the six months ended June 30, 2019, proceeds from the exercise of stock options were $1.4 million and related tax benefit was $68,000. A total of 148,748 stock options were exercised during the year ended December 31, 2018. During the year ended December 31, 2018, proceeds from the exercise of stock options were $1.7 million and related tax benefit was $449,000. No stock options vested during the six months ended June 30, 2019.

The Company recognizes share-based compensation based on the estimated fair value of the option at the grant date. Forfeitures are estimated based upon industry standards. Share-based compensation expense is included in non-interest expense in the Consolidated Statements of Operations. The following table summarizes stock option compensation expense for the six months ended June 30, 2019 and 2018:

	Six Months Ended June 30,
	2019			2018
Total share-based compensation (benefit) - stock options	$	(133	)	$	450
Income tax benefit (expense)		(37	)		125
Unrecognized compensation expense - stock options		35			271
Weighted-average amortization period remaining	0.7 years			1.3 years

Pursuant to the terms of the Merger Agreement, upon the Effective Time, each outstanding First Evanston Option held by a participant in the First Evanston Bancorp, Inc. Stock Incentive Plan (the “FEB Plan”) ceased to represent a right to acquire shares of First Evanston common stock and was assumed and converted automatically into a fully vested and exercisable adjusted option to purchase shares of Byline common stock (each an “Adjusted Option”). In accordance with the Merger Agreement, the number of shares of Byline common stock to which each such Adjusted Option relates is equal to the product (rounded down to the nearest whole share of Byline common stock) of: (a) the number of shares of First Evanston common stock subject to the First Evanston Option immediately prior to May 31, 2018, multiplied by (ii) 4.725. Each Adjusted Option has an exercise price per share of Byline common stock equal to the quotient (rounded up to the nearest whole cent) of (x) the per share exercise price of such First Evanston Option immediately prior to May 31, 2018, divided by (y) 4.725. The description of the conversion process is based on, and qualified by, the Merger Agreement.

The following table discloses the activity in shares subject to options under the FEB Plan and the weighted average exercise prices, in actual dollars, for the six months ended June 30, 2019:

	FEB Plan
	Number of Shares			Weighted Average Exercise Price		Intrinsic Value		Weighted Average Remaining Contractual Term (in Years)
Beginning balance, January 1, 2019		624,383		$	11.31	$	3,339		5.2
Granted		—
Expired		—
Exercised		(80,710	)		11.24	$	673
Forfeited		—
Ending balance outstanding at    June 30, 2019		543,673		$	11.32	$	4,239		4.8
Exercisable at June 30, 2019		543,673		$	11.32	$	4,239		4.8

A total of 80,710 stock options were exercised during the six months ended June 30, 2019. During the six months ended June 30, 2019, proceeds from the exercise of stock options were $907,000 and related tax benefit was $187,000. A total of 56,404 stock options were exercised during the year ended December 31, 2018. During the year ended December 31, 2018, proceeds from the exercise of stock options were $601,000 and related tax benefit was $168,000.

All shares of restricted performance shares of First Evanston common stock (“restricted stock”) that were previously issued under and held by Participants in the FEB Plan prior to the Merger were converted into the right to receive the per share merger consideration in connection with the Merger and pursuant to the Merger Agreement. Accordingly, no shares of First Evanston restricted stock remain outstanding under the FEB Plan.

On April 30, 2019, the Company completed the acquisition of Oak Park River Forest. On May 15, 2019, the Company made a cash payment of $4.2 million for 35,870 outstanding Oak Park River Forest options to participants who elected to receive a cash payment in lieu of converting the options to the Omnibus plan.

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Earnings per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Earnings per Share

Note 19—Earnings per Share

A reconciliation of the numerators and denominators for earnings per common share computations is presented below. Incremental shares represent outstanding stock options for which the exercise price is less than the average market price of the Company’s common stock during the periods presented. Options to purchase 1,995,745 and 2,364,057 shares of common stock were outstanding as of June 30, 2019 and 2018, respectively. There were 288,560 and 194,455 restricted stock awards outstanding at June 30, 2019 and 2018, respectively.

The following represent the calculation of basic and diluted earnings per share for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Net income	$	13,211	$	2,768	$	25,808	$	9,536
Less: Dividends on preferred shares		195		198		391		391
Net income available to common stockholders	$	13,016	$	2,570	$	25,417	$	9,145
Weighted-average common stock outstanding:
Weighted-average common stock outstanding    (basic)		37,263,352		31,614,973		36,719,436		30,459,495
Incremental shares		684,654		953,423		725,971		988,825
Weighted-average common stock outstanding (dilutive)		37,948,006		32,568,396		37,445,407		31,448,320
Basic earnings per common share	$	0.35	$	0.08	$	0.69	$	0.30
Diluted earnings per common share	$	0.34	$	0.08	$	0.68	$	0.29

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Stockholders' Equity

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Stockholders' Equity

Note 20—Stockholders’ Equity

A summary of the Company’s preferred and common stock at June 30, 2019 and December 31, 2018 is as follows:

	June 30,		December 31,
	2019		2018
Series B 7.5% fixed to floating non-cumulative    perpetual preferred stock
Par value	$	0.01	$	0.01
Shares authorized		50,000		50,000
Shares issued		10,438		10,438
Shares outstanding		10,438		10,438
Common stock, voting
Par value	$	0.01	$	0.01
Shares authorized		150,000,000		150,000,000
Shares issued		38,115,219		36,343,239
Shares outstanding		38,115,219		36,343,239

During 2016, the Company authorized and issued Series B 7.50% fixed-to-floating non-voting, noncumulative perpetual preferred stock with a liquidation preference of $1,000 per share, plus the amount of unpaid dividends, if any, which is redeemable at the Company’s option on or after March 31, 2022. Holders of Series B Preferred Stock do not have any rights to convert such stock into shares of any other class of capital stock of the Company. Holders of Series B Preferred Stock are entitled to receive a fixed dividend of 7.50% per annum from the original issue date through December 30, 2021, after which the dividend is paid at a floating rate of three-month LIBOR plus 5.41% per annum.

The Company Series B Preferred Stock is included in Tier 1 capital for regulatory capital purposes and is redeemable at the option of the Company at a redemption price of $1,000 per share, plus any declared and unpaid dividends (i) in whole or part on any dividend payment date on or after March 31, 2022, and (ii) in whole but not in part prior to March 31, 2022, within 90 days following a regulatory event, as defined in the Certificate of Designations of the Company Series B Preferred Stock. The Company must receive approval of the Federal Reserve Board prior to any redemption of the Company Series B Preferred Stock.

For the three months ended June 30, 2019, the Company declared and paid dividends on the Series B preferred stock of $195,000, compared to $198,000 for the three months ended June 30, 2018. For the six months ended June 30, 2019 and 2018, the Company declared and paid dividends on the Series B preferred stock of $391,000.

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Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2019

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)

Note 21—Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in accumulated other comprehensive income (loss) for the six months ended June 30, 2019 and 2018:

(dollars in thousands)	Unrealized Gains (Losses) on Cash Flow Hedges			UnrealizedGains (Losses) on Available-for -Sale Securities			Total Accumulated Other Comprehensive Income (Loss)
Balance, January 1, 2018	$	2,913		$	(8,000	)	$	(5,087	)
Reclassification of certain income tax effects from    accumulated other comprehensive income		687			(1,450	)		(763	)
Other comprehensive income (loss), net of tax		3,750			(8,235	)		(4,485	)
Balance, June 30, 2018	$	7,350		$	(17,685	)	$	(10,335	)
Balance, January 1, 2019	$	4,763		$	(14,261	)	$	(9,498	)
Adoption of ASU 2016-01		—			(1,440	)		(1,440	)
Other comprehensive income (loss), net of tax		(4,699	)		14,289			9,590
Balance, June 30, 2019	$	64		$	(1,412	)	$	(1,348	)

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Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

These unaudited interim condensed consolidated financial statements include the accounts of BylineBancorp, Inc., a Delaware corporation(the“Company,” “Byline,”“we,” “us,”“our”),a bank holding companywhose principalactivityistheownershipand managementof its Illinois state chartered subsidiarybank, BylineBank (the “Bank”), based in Chicago, Illinois.

These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). In preparing these financial statements, the Company has evaluated events and transactions subsequent to June 30, 2019 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information in footnote disclosures normally included in financial statements prepared in accordance with GAAP has been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Consolidated Financial Statements for the years ended December 31, 2018, 2017, and 2016.

In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 855, “Subsequent Events,” the Company’s management has evaluated subsequent events for potential recognition or disclosure through the date of the issuance of these consolidated financial statements.

The Company has one reportable segment. The Company’s chief operating decision maker evaluates the operations of the Company using consolidated information for purposes of allocating resources and assessing performance. Therefore, segments disclosures are not required.

No subsequent events were identified that would have required a change to the consolidated financial statements or disclosure in the notes to the consolidated financial statements.

Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity.

Accounting Pronouncements Recently Adopted or Issued

The following reflect recent accounting pronouncements that have been adopted or are pending adoption by the Company. As the Company qualifies as an emerging growth company and has elected the extended transition period for complying with new or revised accounting pronouncements, it is not subject to new or revised accounting standards applicable to public companies during the extended transition period. The accounting pronouncements pending adoption below reflect effective dates for the Company as an emerging growth company with the extended transition period.

Adopted Accounting Pronouncements

Revenue from Contracts with Customers In May 2014, FASB issued Accounting Standards Update (“ASU”) No. 2014-09, deferred by ASU No. 2015-14 and clarifying standards, Revenue from Contracts with Customers, which creates Topics 606 and 610 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In April 2016, FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing. The amendments in this ASU clarify the following two aspects of Topic 606: (1) identifying performance obligations and (2) licensing implementation guidance, while retaining the related principles for those areas. In May 2016, FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, amending ASC Topic 606, Revenue from Contracts with Customers. The amendments in this ASU affect only several narrow aspects of Topic 606. In November 2017, FASB issued ASU No. 2017-14, amending ASC Topic 606, Revenue from Contracts with Customers. The ASU amends the codification to incorporate additional previously issued guidance from the SEC. The SEC issued SAB 116 to bring existing SEC staff guidance into conformity with the FASB’s adoption of and amendments to ASC Topic 606.

In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The new authoritative guidance was initially effective for reporting periods after January 1, 2017 but was deferred to January 1, 2018. Given our emerging growth status, the Company adopted this new guidance on January 1, 2019 using the full retrospective method, meaning the standard is applied to all periods presented in the financial statements with the cumulative effect of initially applying the standard recognized at the beginning of the earliest period presented.

The majority of the Company’s revenue streams, including interest and dividend income, servicing fees, and gains on sales of loans and investments, are outside the scope of Topic 606. Revenue streams reported as fees and service charges on deposits, ATM and interchange fees, and wealth management and trust income are within the scope of Topic 606. The Company applied the requirements of Topic 606 to the revenue streams that are within its scope. The adoption of Topic 606 did not result in any changes in the either timing or amount of recognized; there was no cumulative effect adjustment to opening retained earnings as no material changes were identified in the timing of revenue recognition. However, the presentation of certain costs associated with our ATM and debit card income were offset against ATM and interchange income. This change in presentation resulted in $381,000 and $727,000 of expenses for the three and six months ended June 30, 2019, respectively, being netted against ATM and interchange fees and reported in non-interest income instead of as other non-interest expense in non-interest expense. In addition, to conform to the current period presentation, $291,000 and $596,000 of related expenses for the three and six months ended June 30, 2018, respectively, were reclassified from other non-interest expense in non-interest expense to being netted against ATM and interchange fees in non-interest income. The Company elected to apply the practical expedient and therefore does not disclose information about remaining performance obligations that have an original expected term of one year or less and allows the Company to expense costs related to obtaining a contract as incurred when the amortization period would have been one year or less.

The Company adopted ASU 2014-09 using the full retrospective approach. The following table presents the impact of adopting the new revenue standard on our Consolidated Statements of Operations for the periods presented (in thousands):

	For the Three Months Ended							For the Three Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	945	$	1,326	$	(381	)	$	850	$	1,141	$	(291	)
Non-interest expense:
Other non-interest expense	$	2,711	$	3,092	$	(381	)	$	2,137	$	2,428	$	(291	)

	For the Six Months Ended							For the Six Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	1,662	$	2,389	$	(727	)	$	1,763	$	2,359	$	(596	)
Non-interest expense:
Other non-interest expense	$	5,679	$	6,406	$	(727	)	$	3,889	$	4,485	$	(596	)

Fees and service charges on deposits:  

Fees and service charges on deposits include transaction and non-transaction based deposit fees. Transaction based fees on deposit accounts are charged to deposit customers for specific services provided to the customer. These fees include such items as wire fees, official check fees, and overdraft fees. These are contracts specific to each individual transaction and do not extend beyond the individual transaction. The performance obligation is completed and the fees are recognized at the time the specific transactional service is provided to the customer. Non-transactional deposit fees are typically monthly account maintenance fees charged on deposit accounts. These are day-to-day contracts that can be cancelled by either party without notice. The performance obligation is satisfied and the fees are recognized on a monthly basis after the service period is completed.

ATM and interchange fees:  

ATM fees represent fees earned when a foreign debit or ATM card is used in a Byline Bank ATM. These fees are assessed and paid at the time of each transaction as the performance obligation is satisfied, which is at the point in time that the transaction is performed and approved. Interchange fees represent fees earned when a debit card issued by the Bank is used to purchase goods or services at a merchant. The merchant's bank pays the Bank a default interchange rate set by MasterCard on a transaction by transaction basis. Interchange fees are assessed as the performance obligation is satisfied, which is at the point in time the card transaction is authorized. The performance obligation is satisfied and the fees are earned when the cost of the transaction is charged to the Bank cardholders’ card. Direct expenses associated with ATM and debit cards are recorded as a net reduction against the ATM and interchange income.

Wealth management and trust income

Wealth management and trust income represents fees earned by the Bank for discretionary investment management, trust administration, fiduciary and/or custody services rendered. Fees vary and are based on a contract with the customer. Fee income is determined as a percentage of assets under management and is recognized over the period the underlying account is serviced. Although some trust appointments can last for generations, most contracts are generally cancellable at any time, with the customer subject to a pro-rated fee in the month of termination.

Recognition and Measurement of Financial Assets and Financial Liabilities In January 2016, FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this ASU require equity securities to be measured at fair value with changes in the fair value recognized through net income. The amendments allow equity investments that do not have readily determinable fair values to be remeasured at fair value under certain circumstances and require enhanced disclosures about those investments. The amendments simplify the impairment assessment of equity investments without readily determinable fair values. The amendments also eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The amendments require entities to adjust fair value disclosures for financial instruments to be reflected at an exit price. The amendments in this ASU require separate presentation in other comprehensive income of the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This amendment excludes from net income gains or losses that the entity may not realize because those financial liabilities are not usually transferred or settled at their fair values before maturity. The amendments in this ASU require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements. The Company adopted the provisions of ASU No. 2016-01 as of January 1, 2019. The adoption of this ASU resulted in the Company reclassifying $1.4 million from other comprehensive income to retained earnings, representing the unrealized gain, net of tax, on available-for-sale for sale equity securities at the date of adoption. The provisions of ASU No. 2016-01 require any future changes in fair value of equity securities to be recorded in the Consolidated Statements of Operations which could result in additional volatility in non-interest income. At December 31, 2018, the Company held $6.6 million of available-for-sale equity investment securities, which were previously reported as available-for-sale securities, at fair value, and are now reported as equity and other securities, at fair value.

In addition, the adoption of this ASU resulted in changing how the Company estimates the fair value of portfolio loans and leases for disclosure purposes. Fair values are estimated first by stratifying the portfolios of loans and leases with similar financial characteristics. Loans and leases are segregated by type such as commercial real estate, residential mortgage, construction, land, and development, commercial and industrial, consumer and other. Each loan and lease category is further segmented into fixed- and adjustable-rate interest terms. An estimate of fair value is then calculated based on discounted cash flows using as a discount rate based on the current rate offered on similar products, plus an adjustment for liquidity to reflect the non-homogeneous nature of the loans and leases, as well as a quarterly loss rate based on historical losses to arrive at an estimated exit price fair value. Fair value for impaired loans and leases is also based on recent appraisals or estimated cash flows discounted using rates commensurate with risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are judgmentally determined using available market information and specific borrower information.

Derivatives and Hedging (Topic 815) In August 2017, FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities. The amendments in this ASU better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The Company adopted the provisions of ASU No. 2017-12 on January 1, 2019. Upon adoption, the Company elected to reclassify $94.8 million of securities held-to-maturity to securities available-for-sale, which did not impact on the Consolidated Statements of Operations.

Compensation—Stock Compensation (Topic 718) In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting. The amendments in the ASU provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all of the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified.  If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification. (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified. (3) the classification of the modified award is an equity instrument or liability instrument is the same as the classification of the original award immediately before the original award is modified.  The amendments are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period, for reporting periods for which financial statements have not yet been issued. The amendments should be applied prospectively to an award modified on or after the adoption date. Given our emerging growth status, the Company adopted the provisions of ASU No. 2017-09 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

Statement of Cash Flows (Topic 230) In August 2016, FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments. There is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230 and other Topics. This ASU addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. Those eight issues are (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions, and (8) separately identifiable cash flows and application of the predominance principle. Current GAAP either is unclear or does not include specific guidance on these eight cash flow classification issues. These amendments provide guidance for each of the eight issues, thereby reducing current and potential future diversity in practice. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. Given the Company’s emerging growth company status, the new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company adopted the provisions of ASU No. 2016-15 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash. The ASU will require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this update apply to all entities that have restricted cash or restricted cash equivalents and are required to present a statement of cash flows under Topic 230. The amendment is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years. Given our emerging growth status, the Company adopted these amendments on January 1, 2019 in conjunction with ASU No. 2016-15, which did not have a material impact on the Company’s Consolidated Financial Statements.

Business Combinations (Topic 805) In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business. The guidance clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. This guidance is effective for annual and interim periods beginning after December 15, 2017. Given our emerging growth status, the Company adopted the provisions of ASU No. 2017-01 on January 1, 2019, which did not have a material impact on the Company’s Consolidated Financial Statements.

Fair Value Measurement (Topic 820) In August 2018, FASB issued ASU No. 2018-13, Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU modify the disclosure requirements on fair value measurements in Topic 820. The amendments remove the disclosure requirements for the amount and reasons for transfers between Level 1 and Level 2 securities of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurement. The amendments modify the disclosure requirements as follows:for investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly; andclarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The amendments add the following disclosure requirements: the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period; andthe range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Early adoption is permitted. The Company early adopted these amendments in 2018, which did not have a material impact on the Company’s Consolidated Financial Statements.

Issued Accounting Pronouncements Pending Adoption

Leases (Topic 842) In February 2016, FASB issued ASU No. 2016-02, Leases. The amendments in this ASU require lessees to recognize the following for all leases (with the exception of short-term) at the commencement date; a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The amendments in this ASU leave lessor accounting largely unchanged, although certain targeted improvements were made to align lessor accounting with the lessee accounting model. This ASU simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is evaluating the new guidance and its impact on the Company’s Consolidated Statements of Operations and Consolidated Statements of Financial Condition. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company expects an increase in assets and liabilities as a result of recognizing additional right-to-use assets and liabilities under lease contracts in which the Company is lessee. While the Company has not quantified the impact of this ASU on its leasing portfolio, it does not expect a change in its accounting for the initial direct costs of leases.

Financial Instruments—Credit Losses (Topic 326) In June 2016, FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments. Current GAAP requires an “incurred loss” methodology for recognizing credit losses that delays recognition until it is probable a loss has been incurred. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this ASU replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this ASU require a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit loss, which will be more decision useful to users of the financial statements. The amendments in this ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2021. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. While the Company has not quantified the impact of this ASU, it does expect changing from the current incurred loss model to an expected loss model will result in an earlier recognition of losses.

Nonrefundable Fees and Other Costs (Subtopic 310-20) In March 2017, FASB issued ASU No. 2017-08, Receivables—Nonrefundable Fees and Other Costs. The amendments in the ASU shorten the amortization period for certain callable debt securities held at a premium at the earliest call date. Under current GAAP, the Company amortizes the premium as an adjustment of yield over the contractual life of the instrument. As a result, upon exercise of a call on a callable debt security held at a premium, the unamortized premium is charged to earnings. The ASU shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. However, the amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company is required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Assuming the Company remains an emerging growth company, the new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is currently evaluating the provisions of ASU No. 2017-08 to determine the potential impact the new standard will have on the Company’s Consolidated Financial Statements.

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Accounting Pronouncements Recently Adopted or Issued (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Changes And Error Corrections [Abstract]

Impact of Adopting the New Revenue Standard on Consolidated Statements of Operations

The Company adopted ASU 2014-09 using the full retrospective approach. The following table presents the impact of adopting the new revenue standard on our Consolidated Statements of Operations for the periods presented (in thousands):

	For the Three Months Ended							For the Three Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	945	$	1,326	$	(381	)	$	850	$	1,141	$	(291	)
Non-interest expense:
Other non-interest expense	$	2,711	$	3,092	$	(381	)	$	2,137	$	2,428	$	(291	)

	For the Six Months Ended							For the Six Months Ended
	June 30, 2019							June 30, 2018
	As Reported		Balance without Adoption of ASC 606		Effect of Change			As Reported		Balance without Adoption of ASC 606		Effect of Change
Non-interest income:
ATM and interchange fees	$	1,662	$	2,389	$	(727	)	$	1,763	$	2,359	$	(596	)
Non-interest expense:
Other non-interest expense	$	5,679	$	6,406	$	(727	)	$	3,889	$	4,485	$	(596	)

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Acquisitions (Tables)

6 Months Ended

Jun. 30, 2019

Business Combinations [Abstract]

Summary of Fair Values of Assets and Liabilities Assumed as of Acquisition Dates

The following table presents a summary of the fair values of assets acquired and liabilities assumed as of the acquisition dates:

	Preliminary Estimates April 30, 2019 Oak Park River Forest		May 31, 2018 First Evanston
Assets
Cash and cash equivalents	$	10,469	$	47,378
Securities available-for-sale		30,343		128,063
Restricted stock		414		1,360
Loans		261,151		916,011
Premises and equipment		3,488		15,890
Other real estate owned		2,201		—
Other intangible assets		6,220		22,276
Bank-owned life insurance		3,485		—
Deferred tax assets, net		4,887		2,302
Other assets		1,256		8,845
Total assets acquired		323,914		1,142,125
Liabilities
Deposits		290,171		1,022,268
Line of credit		5,655		—
Federal Home Loan Bank advances		5,300		—
Junior subordinated debentures		—		8,497
Accrued expenses and other liabilities		4,766		5,844
Total liabilities assumed		305,892		1,036,609
Net assets acquired	$	18,022	$	105,516
Consideration paid
Common stock (2019 - 1,464,558 shares issued at $20.02 per    share, 2018 - 6,682,850 shares issued at $21.62 per share)		29,320		144,483
Outstanding stock options converted to Byline stock    options		—		7,644
Cash paid		6,163		27,004
Total consideration paid		35,483		179,131
Goodwill	$	17,461	$	73,615

Summary of Acquired Non-Impaired Loans as of Acquisition Dates

The following table presents the acquired non-impaired loans as of the acquisition dates:  

	April 30, 2019 Oak Park River Forest		May 31, 2018 First Evanston
Fair value	$	212,587	$	890,986
Gross contractual amounts receivable		275,553		1,057,374
Estimate of contractual cash flows not expected to be    collected(1)		23,932		36,544
Estimate of contractual cash flows expected to be collected		251,621		1,020,830

(1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

Summary of Pro Forma Information for Results of Operations

The following table provides the unaudited pro forma information for the results of operations for the three and six months ended June 30, 2019 and 2018, as if the acquisitions had occurred on January 1, 2018. The pro forma results combine the historical results of First Evanston and Oak Park River Forest into the Company’s Consolidated Statements of Operations, including the impact of certain acquisition accounting adjustments, which includes loan discount accretion, intangible assets amortization, deposit premium accretion, and borrowing, net of discount amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2018. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, provision for credit losses, expense efficiencies or asset dispositions. The acquisition-related expenses that have been recognized are included in net income in the following table for the three and six months ended June 30, 2019 and 2018.

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Total revenues (net interest income and non-interest    income)	$	69,874	$	68,041	$	136,770	$	131,636
Net income	$	14,909	$	14,280	$	29,460	$	26,372
Earnings per share—basic	$	0.39	$	0.38	$	0.77	$	0.69
Earnings per share—diluted	$	0.38	$	0.37	$	0.76	$	0.68

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Securities (Tables)

6 Months Ended

Jun. 30, 2019

Investments Debt And Equity Securities [Abstract]

Summary of Amortized Cost and Fair Values of Securities Available-for-sale, Held to Maturity and Equity and Other Securities

The followingtablessummarizetheamortizedcostand fairvaluesof securitiesavailable-for-sale, securitiesheld-to-maturity and equity and other securitiesas of the dates shown and thecorrespondingamountsof grossunrealized gainsand losses:

June 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	45,348	$	482	$	—		$	45,830
U.S. Government agencies		176,425		1,434		(153	)		177,706
Obligations of states, municipalities, and political    subdivisions		88,240		1,695		(17	)		89,918
Residential mortgage-backed securities
Agency		354,480		1,820		(3,889	)		352,411
Non-agency		94,471		418		(399	)		94,490
Commercial mortgage-backed securities
Agency		123,639		765		(1,010	)		123,394
Non-agency		31,302		83		(16	)		31,369
Corporate securities		38,717		290		(108	)		38,899
Other securities		15,012		—		—			15,012
Total	$	967,634	$	6,987	$	(5,592	)	$	969,029

June 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	4,421	$	67	$	—	$	4,488
Total	$	4,421	$	67	$	—	$	4,488

December 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	52,775	$	81	$	(189	)	$	52,667
U.S. Government agencies		187,427		367		(1,296	)		186,498
Obligations of states, municipalities, and political    subdivisions		60,686		133		(586	)		60,233
Residential mortgage-backed securities
Agency		284,038		101		(11,176	)		272,963
Non-agency		84,998		199		(1,576	)		83,621
Commercial mortgage-backed securities
Agency		93,543		55		(3,164	)		90,434
Non-agency		31,458		—		(1,000	)		30,458
Corporate securities		34,716		67		(610	)		34,173
Other securities		4,613		2,127		(131	)		6,609
Total	$	834,254	$	3,130	$	(19,728	)	$	817,656

December 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	23,835	$	40	$	(210	)	$	23,665
Residential mortgage-backed securities
Agency		40,082		93		(531	)		39,644
Non-agency		35,349		—		(919	)		34,430
Total	$	99,266	$	133	$	(1,660	)	$	97,739

Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Available-for-sale and Held to Maturity

Gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2019 and December 31, 2018, are summarized as follows:

			Less than 12 Months					12 Months or Longer					Total
June 30, 2019	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		—	$	—	$	—		$	—	$	—		$	—	$	—
U.S. Government agencies		7		367		(1	)		41,223		(152	)		41,590		(153	)
Obligations of states, municipalities and    political subdivisions		7		—		—			4,792		(17	)		4,792		(17	)
Residential mortgage-backed securities
Agency		45		—		—			244,457		(3,889	)		244,457		(3,889	)
Non-agency		10		—		—			59,976		(399	)		59,976		(399	)
Commercial mortgage-backed securities
Agency		8		11,273		(31	)		50,907		(979	)		62,180		(1,010	)
Non-agency		1		—		—			10,322		(16	)		10,322		(16	)
Corporate securities		5		2,523		(18	)		8,006		(90	)		10,529		(108	)
Other securities		—		—		—			—		—			—		—
Total		83	$	14,163	$	(50	)	$	419,683	$	(5,542	)	$	433,846	$	(5,592	)

			Less than 12 Months					12 Months or Longer					Total
December 31, 2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		18	$	23,835	$	(52	)	$	9,865	$	(137	)	$	33,700	$	(189	)
U.S. Government agencies		25		43,487		(80	)		50,101		(1,216	)		93,588		(1,296	)
Obligations of states, municipalities and    political subdivisions		56		13,926		(97	)		18,563		(489	)		32,489		(586	)
Residential mortgage-backed securities
Agency		42		4,288		(45	)		254,121		(11,131	)		258,409		(11,176	)
Non-agency		8		59,107		(1,378	)		4,009		(198	)		63,116		(1,576	)
Commercial mortgage-backed securities
Agency		9		21,356		(447	)		52,640		(2,717	)		73,996		(3,164	)
Non-agency		5		—		—			30,458		(1,000	)		30,458		(1,000	)
Corporate securities		15		25,762		(342	)		4,642		(268	)		30,404		(610	)
Other securities		1		—		—			2,844		(131	)		2,844		(131	)
Total		179	$	191,761	$	(2,441	)	$	427,243	$	(17,287	)	$	619,004	$	(19,728	)

			Less than 12 Months					12 Months or Longer					Total
December 31, 2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Held-to-maturity
Obligations of states, municipalities, and    political subdivisions		23	$	8,127	$	(58	)	$	8,792	$	(152	)	$	16,919	$	(210	)
Residential mortgage-backed securities
Agency		16		6,625		(150	)		21,139		(381	)		27,764		(531	)
Non-agency		7		21,499		(503	)		12,931		(416	)		34,430		(919	)
Total		46	$	36,251	$	(711	)	$	42,862	$	(949	)	$	79,113	$	(1,660	)

Summary of Proceeds From Sales of Securities Available-for-sale and Associated Gains and Losses

The proceeds from all sales of securitiesavailable-for-sale,and theassociatedgainsand losses,for the three and six months ended June 30, 2019 and 2018 are listed below:

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Proceeds	$	59,594	$	544	$	59,594	$	544
Gross gains		1,049		4		1,049		4
Gross losses		76		—		76		—

Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

At June 30, 2019, theamortizedcostand fairvalueof debtsecuritiesareshown by contractual maturity.Expectedmaturitiesmaydifferfromcontractualmaturitiesifborrowershave therightto callor prepay obligationswith or withoutcallor prepaymentpenalties.Securitiesnot due ata singlematuritydateareshown separately. 

	Amortized Cost		Fair Value
Equity and other securities, at fair value
Due after ten years	$	695	$	695
No defined maturity		6,967		6,967
Total	$	7,662	$	7,662
Available-for-sale
Due in one year or less	$	76,144	$	76,267
Due from one to five years		143,846		145,125
Due from five to ten years		98,622		100,172
Due after ten years		45,130		45,801
Mortgage-backed securities		603,892		601,664
Total	$	967,634	$	969,029
Held-to-maturity
Due from one to five years	$	3,808	$	3,862
Due from five to ten years		613		626
Total	$	4,421	$	4,488

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Loan and Lease Receivables (Tables)

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Schedule of Outstanding Loan and Lease Receivables

Outstanding loan and lease receivables as of the dates shown were categorized as follows:

	June 30,			December 31,
	2019			2018
Commercial real estate	$	1,311,539		$	1,261,594
Residential real estate		777,762			704,899
Construction, land development, and other land		251,948			186,258
Commercial and industrial		1,320,338			1,145,240
Installment and other		12,909			13,675
Lease financing receivables		185,345			187,797
Total loans and leases		3,859,841			3,499,463
Net unamortized deferred fees and costs		232			(1,293	)
Initial direct costs		3,075			3,456
Allowance for loan and lease losses		(31,132	)		(25,201	)
Net loans and leases	$	3,832,016		$	3,476,425

	June 30,			December 31,
	2019			2018
Lease financing receivables
Net minimum lease payments	$	201,848		$	204,646
Unguaranteed residual values		1,442			1,535
Unearned income		(17,945	)		(18,384	)
Total lease financing receivables		185,345			187,797
Initial direct costs		3,075			3,456
Lease financial receivables before allowance for    lease losses	$	188,420		$	191,253

Summary of Minimum Annual Lease Payments for Lease Financing Receivables

The minimumannualleasepaymentsforleasefinancingreceivablesas of June 30, 2019 are summarizedas follows:

	Minimum Lease Payments
2019	$	37,931
2020		66,850
2021		47,648
2022		30,628
2023		15,308
Thereafter		3,483
Total	$	201,848

Summary of Balances for Each Respective Loan and Lease Category

The followingtablessummarizethebalancesforeachrespectiveloanand leasecategoryas of June 30, 2019 and December 31, 2018:

June 30, 2019	Originated		Acquired Impaired		Acquired Non- Impaired		Total
Commercial real estate	$	721,230	$	151,127	$	439,182	$	1,311,539
Residential real estate		501,038		118,534		158,190		777,762
Construction, land development, and other land		196,656		4,220		51,072		251,948
Commercial and industrial		992,313		20,370		307,887		1,320,570
Installment and other		10,937		300		1,672		12,909
Lease financing receivables		162,119		—		26,301		188,420
Total loans and leases	$	2,584,293	$	294,551	$	984,304	$	3,863,148

December 31, 2018	Originated		Acquired Impaired		Acquired Non- Impaired		Total
Commercial real estate	$	652,234	$	146,808	$	462,565	$	1,261,607
Residential real estate		466,309		113,934		124,659		704,902
Construction, land development, and other land		144,128		3,779		37,442		185,349
Commercial and industrial		803,508		12,617		328,672		1,144,797
Installment and other		11,718		404		1,596		13,718
Lease financing receivables		159,901		—		31,352		191,253
Total loans and leases	$	2,237,798	$	277,542	$	986,286	$	3,501,626

Schedule of Estimated Fair Value of Impaired Loans Acquired at Acquisition

The following table presents a reconciliation of the undiscounted contractual cash flows, non-accretable difference, accretable yield, and fair value of acquired impaired loans as of the acquisition date of May 31, 2018 (First Evanston) and April 30, 2019 (Oak Park River Forest):

	First Evanston			Oak Park River Forest
Undiscounted contractual cash flows	$	33,594		$	65,223
Undiscounted cash flows not expected to be collected (non-accretable difference)		(5,003	)		(8,158	)
Undiscounted cash flows expected to be collected		28,591			57,065
Accretable yield at acquisition		(3,566	)		(8,501	)
Estimated fair value of impaired loans acquired at acquisition	$	25,025		$	48,564

Summary of Outstanding Balance and Carrying Amount of All Acquired Impaired Loans

The outstandingbalanceand carryingamountof allacquiredimpairedloansaresummarizedbelow. The balancesdo not includean allowanceforloanand leaselossesof $3.5 million and $2.7 million,at June 30, 2019 and December 31, 2018, respectively.

	June 30, 2019				December 31, 2018
	Outstanding Balance		Carrying Value		Outstanding Balance		Carrying Value
Commercial real estate	$	205,109	$	151,127	$	216,137	$	146,808
Residential real estate		169,171		118,534		173,962		113,934
Construction, land development, and other land		13,348		4,220		11,962		3,779
Commercial and industrial		30,041		20,370		24,972		12,617
Installment and other		1,131		300		1,735		404
Total acquired impaired loans	$	418,800	$	294,551	$	428,768	$	277,542

Summary of Changes in Accretable Yield for Acquired Impaired Loans

The following table summarizes the changes in accretable yield for acquired impaired loans for the three and six months ended June 30, 2019 and 2018: 

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Beginning balance	$	29,340		$	39,300		$	37,115		$	36,446
Additions		8,501			3,566			8,501			3,566
Accretion to interest income		(5,996	)		(5,871	)		(11,245	)		(11,562	)
Reclassification from nonaccretable difference, net		14,693			4,311			12,167			12,856
Ending balance	$	46,538		$	41,306		$	46,538		$	41,306

Schedule of Unpaid Principal Balance and Carrying Value for Acquired Non-Impaired Loans and Leases

The unpaidprincipalbalanceand carryingvalueforacquirednon-impairedloansand leasesat June 30, 2019 and December 31, 2018 were as follows:

	June 30, 2019				December 31, 2018
	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
Commercial real estate	$	449,734	$	439,182	$	473,262	$	462,565
Residential real estate		160,844		158,190		127,478		124,659
Construction, land development, and other land		52,459		51,072		38,494		37,442
Commercial and industrial		317,902		307,887		344,879		328,672
Installment and other		1,714		1,672		1,831		1,596
Lease financing receivables		27,958		26,301		32,977		31,352
Total acquired non-impaired loans and leases	$	1,010,611	$	984,304	$	1,018,921	$	986,286

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments (Tables)

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Summary of Allowance for Loan and Lease Losses and Corresponding Loan and Lease Balances

The followingtablessummarizethebalanceand activitywithintheallowanceforloanand leaselosses, thecomponentsof theallowanceforloanand leaselossesin termsof loansand leasesindividuallyand collectivelyevaluatedforimpairment,and correspondingloanand leasebalancesby typefor the three and six months ended June 30, 2019 and 2018 are as follows:

June 30, 2019	Commercial Real Estate			Residential Real Estate			Construction, Land Development, and Other Land		Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Allowance for loan and lease losses
Three months ended
Beginning balance	$	6,660		$	1,970		$	536	$	15,630		$	63		$	2,247		$	27,106
Provisions		2,695			(62	)		155		3,320			8			275			6,391
Charge-offs		(818	)		(9	)		—		(1,827	)		(4	)		(622	)		(3,280	)
Recoveries		397			272			—		3			—			243			915
Ending balance	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132
Six months ended
Beginning balance	$	7,540		$	1,751		$	466	$	12,932		$	49		$	2,463		$	25,201
Provisions		3,137			156			225		6,352			22			498			10,390
Charge-offs		(2,169	)		(9	)		—		(2,179	)		(4	)		(1,267	)		(5,628	)
Recoveries		426			273			—		21			—			449			1,169
Ending balance	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132
Ending balance:
Individually evaluated for    impairment	$	2,775		$	22		$	—	$	6,489		$	—		$	—		$	9,286
Collectively evaluated for    impairment		4,433			1,559			676		9,495			65			2,143			18,371
Loans acquired with deteriorated    credit quality		1,726			590			15		1,142			2			—			3,475
Total allowance for loan and lease    losses	$	8,934		$	2,171		$	691	$	17,126		$	67		$	2,143		$	31,132

June 30, 2019	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Loans and leases ending balance:
Individually evaluated for    impairment	$	18,707	$	2,899	$	—	$	24,278	$	—	$	—	$	45,884
Collectively evaluated for    impairment		1,141,705		656,329		247,728		1,275,922		12,609		188,420		3,522,713
Loans acquired with deteriorated    credit quality		151,127		118,534		4,220		20,370		300		—		294,551
Total loans and leases	$	1,311,539	$	777,762	$	251,948	$	1,320,570	$	12,909	$	188,420	$	3,863,148

June 30, 2018	Commercial Real Estate			Residential Real Estate		Construction, Land Development, and Other Land			Commercial and Industrial			Installment and Other			Lease Financing Receivables			Total
Allowance for loan and lease losses
Three months ended
Beginning balance	$	5,319		$	1,564	$	201		$	7,763		$	61		$	2,732		$	17,640
Provisions		1,336			84		131			1,956			1			448			3,956
Charge-offs		(202	)		—		—			(1,596	)		(32	)		(555	)		(2,385	)
Recoveries		—			—		—			246			—			230			476
Ending balance	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687
Six months ended
Beginning balance	$	4,794		$	1,638	$	222		$	7,418		$	41		$	2,593		$	16,706
Provisions		2,270			10		528			5,380			21			862			9,071
Charge-offs		(611	)		—		(418	)		(4,681	)		(32	)		(1,065	)		(6,807	)
Recoveries		—			—		—			252			—			465			717
Ending balance	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687
Ending balance:
Individually evaluated for    impairment	$	2,199		$	127	$	—		$	2,555		$	14		$	—		$	4,895
Collectively evaluated for    impairment		2,752			1,171		310			4,940			13			2,855			12,041
Loans acquired with deteriorated    credit quality		1,502			350		22			874			3			—			2,751
Total allowance for loan and lease    losses	$	6,453		$	1,648	$	332		$	8,369		$	30		$	2,855		$	19,687

June 30, 2018	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Loans and leases ending balance:
Individually evaluated for    impairment	$	16,397	$	2,273	$	—	$	14,889	$	14	$	—	$	33,573
Collectively evaluated for    impairment		1,055,969		567,578		183,756		995,584		12,271		186,875		3,002,033
Loans acquired with deteriorated    credit quality		162,621		129,737		4,860		15,347		521		—		313,086
Total loans and leases	$	1,234,987	$	699,588	$	188,616	$	1,025,820	$	12,806	$	186,875	$	3,348,692

Summary of Recorded Investment, Unpaid Principal Balance, and Related Allowance for Loans and Leases Considered Impaired

The followingtablessummarizetherecordedinvestment,unpaidprincipalbalance, and relatedallowanceforloansand leasesconsideredimpaired as of June 30, 2019 and December 31, 2018, which excludes acquired impaired loans:

June 30, 2019	Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded
Commercial real estate	$	8,286	$	11,436	$	—
Residential real estate		2,688		2,742		—
Commercial and industrial		11,873		15,319		—
With an allowance recorded
Commercial real estate		10,421		11,024		2,775
Residential real estate		211		237		22
Commercial and industrial		12,405		13,407		6,489
Total impaired loans	$	45,884	$	54,165	$	9,286

December 31, 2018	Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded
Commercial real estate	$	6,110	$	7,693	$	—
Residential real estate		1,886		1,858		—
Commercial and industrial		11,193		13,961		—
With an allowance recorded
Commercial real estate		5,873		6,313		2,191
Residential real estate		251		253		61
Commercial and industrial		10,601		11,153		4,397
Total impaired loans	$	35,914	$	41,231	$	6,649

Summary of Average Recorded Investment and Interest Income Recognized for Loans and Leases Considered Impaired

The following tables summarize the average recorded investment and interest income recognized for loans and leases considered impaired, which excludes acquired impaired loans, for the six months ended as follows:

June 30, 2019	Average Recorded Investment		Interest Income Recognized
With no related allowance recorded
Commercial real estate	$	8,094	$	187
Residential real estate		1,785		27
Commercial and industrial		11,583		223
With an allowance recorded
Commercial real estate		6,793		155
Residential real estate		219		4
Commercial and industrial		12,043		247
Total impaired loans	$	40,517	$	843

June 30, 2018	Average Recorded Investment		Interest Income Recognized
With no related allowance recorded
Commercial real estate	$	10,013	$	436
Residential real estate		1,959		25
Commercial and industrial		7,283		99
With an allowance recorded
Commercial real estate		4,587		183
Residential real estate		347		3
Commercial and industrial		8,784		233
Installment and other		14		979
Total impaired loans	$	32,987	$	1,958

Summary of Risk Rating Categories of Loans and Leases Considered for Inclusion in Allowance for Loan and Lease Losses Calculation

The followingtablessummarizetheriskratingcategoriesof theloansand leasesconsideredfor inclusionin theallowanceforloanand leaselossescalculation,excludingacquiredimpairedloans,as of June 30, 2019 and December 31, 2018:

June 30, 2019	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Pass	$	1,036,018	$	620,414	$	217,408	$	1,068,796	$	12,565	$	184,922	$	3,140,123
Watch		87,111		32,703		30,320		152,953		38		28		303,153
Special Mention		16,837		3,581		—		48,567		—		2,295		71,280
Substandard		20,446		2,530		—		29,884		6		319		53,185
Doubtful		—		—		—		—		—		856		856
Loss		—		—		—		—		—		—		—
Total	$	1,160,412	$	659,228	$	247,728	$	1,300,200	$	12,609	$	188,420	$	3,568,597

December 31, 2018	Commercial Real Estate		Residential Real Estate		Construction, Land Development, and Other Land		Commercial and Industrial		Installment and Other		Lease Financing Receivables		Total
Pass	$	1,009,041	$	553,665	$	147,123	$	962,291	$	9,997	$	188,314	$	2,870,431
Watch		76,276		29,522		31,376		112,996		3,302		80		253,552
Special Mention		17,602		5,656		3,071		34,314		—		1,794		62,437
Substandard		11,880		2,125		—		22,579		15		818		37,417
Doubtful		—		—		—		—		—		247		247
Loss		—		—		—		—		—		—		—
Total	$	1,114,799	$	590,968	$	181,570	$	1,132,180	$	13,314	$	191,253	$	3,224,084

Summary of Contractual Delinquency Information

The following tables summarize contractual delinquency information for acquired non-impaired and originated loans and leases by category at June 30, 2019 and December 31, 2018:

June 30, 2019	30-59 Days Past Due		60-89 Days Past Due		Greater than 90 Days and Accruing		Non- accrual		Total Past Due		Current		Total
Commercial real estate	$	4,261	$	3,665	$	996	$	12,220	$	21,142	$	1,139,270	$	1,160,412
Residential real estate		1,311		—		—		2,335		3,646		655,582		659,228
Construction, land development, and    other land		—		—		—		—		—		247,728		247,728
Commercial and industrial		4,387		1,943		—		18,610		24,940		1,275,260		1,300,200
Installment and other		88		50		—		6		144		12,465		12,609
Lease financing receivables		845		319		—		856		2,020		186,400		188,420
Total	$	10,892	$	5,977	$	996	$	34,027	$	51,892	$	3,516,705	$	3,568,597

December 31, 2018	30-59 Days Past Due		60-89 Days Past Due		Greater than 90 Days and Accruing		Non- accrual		Total Past Due		Current		Total
Commercial real estate	$	6,659	$	2,145	$	—	$	9,484	$	18,288	$	1,096,511	$	1,114,799
Residential real estate		4,488		711		—		1,815		7,014		583,954		590,968
Construction, land development, and    other land		—		—		—		—		—		181,570		181,570
Commercial and industrial		5,829		1,376		—		13,932		21,137		1,111,043		1,132,180
Installment and other		1,932		4		—		12		1,948		11,366		13,314
Lease financing receivables		789		530		—		591		1,910		189,343		191,253
Total	$	19,697	$	4,766	$	—	$	25,834	$	50,297	$	3,173,787	$	3,224,084

Summary of TDR's by Loan Category

The tables below present TDRs by loan category as of June 30, 2019 and December 31, 2018:

June 30, 2019	Number of Loans		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Charge-offs		Specific Reserves
Accruing:
Commercial real estate		3	$	1,105	$	1,105	$	—	$	198
Commercial and industrial		2		214		214		—		126
Residential real estate		2		210		210		—		—
Total accruing		7		1,529		1,529		—		324
Non-accruing:
Commercial real estate		10		3,465		2,970		495		253
Commercial and industrial		8		6,735		4,864		1,871		1,278
Total non-accruing		18		10,200		7,834		2,366		1,531
Total troubled debt restructurings		25	$	11,729	$	9,363	$	2,366	$	1,855

December 31, 2018	Number of Loans		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Charge-offs		Specific Reserves
Accruing:
Commercial real estate		4	$	1,508	$	1,508	$	—	$	113
Commercial and industrial		2		191		191		—		100
Residential real estate		1		114		114		—		—
Total accruing		7		1,813		1,813		—		213
Non-accruing:
Commercial real estate		9		2,512		2,471		41		743
Commercial and industrial		6		6,714		4,843		1,871		1,290
Total non-accruing		15		9,226		7,314		1,912		2,033
Total troubled debt restructurings		22	$	11,039	$	9,127	$	1,912	$	2,246

Summary of Loans Modified as Troubled Debt Restructurings

Loans modifiedas troubleddebtrestructuringsthatoccurredduringthe three and six months ended June 30, 2019 and 2018:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Accruing:
Beginning balance	$	1,921		$	1,037		$	1,813		$	1,061
Additions		—			37			113			37
Net payments		(44	)		(24	)		(49	)		(48	)
Net transfers from (to) non-accrual		(348	)		188			(348	)		188
Ending balance		1,529			1,238			1,529			1,238
Non-accruing:
Beginning balance		7,119			1,093			7,314			1,569
Additions		1,182			5,332			1,428			5,332
Net payments		(815	)		(461	)		(726	)		(793	)
Charge-offs		—			—			(530	)		(144	)
Net transfers from (to) accrual		348			(188	)		348			(188	)
Ending balance		7,834			5,776			7,834			5,776
Total troubled debt restructurings		9,363			7,014			9,363			7,014

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Servicing Assets (Tables)

6 Months Ended

Jun. 30, 2019

Transfers And Servicing [Abstract]

Activity for Servicing Assets and Related Changes in Fair Value

Activityforservicingassetsand therelatedchangesin fairvalue for the three and six months ended June 30, 2019 and 2018 is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Beginning balance	$	19,534		$	21,615		$	19,693		$	21,400
Additions, net		1,449			2,046			2,551			4,148
Changes in fair value		(1,223	)		(2,074	)		(2,484	)		(3,961	)
Ending balance	$	19,760		$	21,587		$	19,760		$	21,587

Unpaid Principal Balances of Loans Serviced for Others

The unpaidprincipalbalancesof theseloansservicedforothers as of June 30, 2019 and December 31, 2018 were as follows:

	June 30,		December 31,
	2019		2018
Loan portfolios serviced for:
SBA guaranteed loans	$	1,174,929	$	1,151,915
USDA guaranteed loans		106,758		106,184
Total	$	1,281,687	$	1,258,099

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Other Real Estate Owned (Tables)

6 Months Ended

Jun. 30, 2019

Banking And Thrift [Abstract]

Change in Other Real Estate Owned

The following table presents the change in other real estate owned (“OREO”) for the three and six months ended June 30, 2019 and 2018:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Beginning balance	$	4,799		$	10,466		$	5,314		$	10,626
Acquisitions of OREO through business    combination		2,201			—			2,201			—
Net additions to OREO		1,846			176			2,076			1,220
Proceeds from sales of OREO		(703	)		(3,859	)		(1,331	)		(5,122	)
Gains (losses) on sales of OREO		6			(249	)		(27	)		(109	)
Valuation adjustments		(79	)		(132	)		(163	)		(213	)
Ending balance	$	8,070		$	6,402		$	8,070		$	6,402

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Goodwill, Core Deposit Intangible and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in Goodwill, Core Deposit Intangible Assets and Customer Relationship Intangible Assets

The following tables summarize the changes in the Company’s goodwill, core deposit intangible assets, and customer relationship intangible assets for the three and six months ended June 30, 2019 and 2018:  

	Six Months Ended June 30,
	2019								2018
	Goodwill		CoreDeposit Intangible			Customer Relationship Intangible			Goodwill		CoreDeposit Intangible			Customer Relationship Intangible
Beginning balance	$	128,177	$	30,360		$	3,059		$	54,562	$	16,720		$	—
Additions		17,461		6,220			—			72,974		19,060			3,216
Amortization		—		(3,598	)		(133	)		—		(1,863	)		(22	)
Ending balance	$	145,638	$	32,982		$	2,926		$	127,536	$	33,917		$	3,194
Accumulated amortization	N/A		$	22,484		$	290		N/A		$	15,329		22
Weighted average remaining    amortization period	N/A		7.0 Years			10.9 Years			N/A		7.4 Years			11.9 Years

	Three Months Ended June 30,
	2019								2018
	Goodwill		CoreDeposit Intangible			Customer Relationship Intangible			Goodwill		CoreDeposit Intangible			Customer Relationship Intangible
Beginning balance	$	128,177	$	28,654		$	2,992		$	54,562	$	15,959		$	—
Additions		17,461	$	6,220			—			72,974		19,060			3,216
Amortization		—		(1,892	)		(66	)		—		(1,102	)		(22	)
Ending balance	$	145,638	$	32,982		$	2,926		$	127,536	$	33,917		$	3,194
Accumulated amortization	N/A		$	22,484		$	290		N/A		$	15,329		22
Weighted average remaining    amortization period	N/A		7.0 Years			10.9 Years			N/A		7.4 Years			11.9 Years

Estimated Amortization Expense for Core Deposit Intangible, Customer Relationship Intangible and Other Intangible Assets Recognized

The following table presents the estimated amortization expense for core deposit intangible, customer relationship intangible, and other intangible assets recognized at June 30, 2019:

	Estimated Amortization
2019	$	4,006
2020		7,571
2021		6,997
2022		6,426
2023		4,370
Thereafter		6,538
Total	$	35,908

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Deposits (Tables)

6 Months Ended

Jun. 30, 2019

Deposits [Abstract]

Composition of Deposits

The composition of deposits was as follows as of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Non-interest-bearing demand deposits	$	1,240,375	$	1,192,873
Interest-bearing checking accounts		345,081		296,339
Money market demand accounts		728,954		640,401
Other savings		480,756		476,418
Time deposits (below $250,000)		980,162		911,603
Time deposits ($250,000 and above)		284,915		232,282
Total deposits	$	4,060,243	$	3,749,916

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Federal Home Loan Bank Advances (Tables)

6 Months Ended

Jun. 30, 2019

Federal Home Loan Banks [Abstract]

Summary of FHLB Advances

The followingtablesummarizestheFHLBadvancesas of June 30, 2019 and December 31, 2018: 

	June 30,			December 31,
	2019			2018
Federal Home Loan Bank advances	$	500,000		$	425,000
Weighted average cost		2.42	%		2.56	%

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Other Borrowings (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Summary of Other Borrowings

The following is a summary of the Company’s other borrowings as of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Securities sold under agreements to repurchase	$	32,885	$	34,166
Line of credit		—		—
Total	$	32,885	$	34,166

Summary of Short-term Credit Lines Available for Use

The followingtablepresentsshort-termcreditlinesavailableforuse, forwhich theCompany did not have an outstandingbalanceas of June 30, 2019 and December 31, 2018:

	June 30,		December 31,
	2019		2018
Federal Reserve Bank of Chicago discount window line	$	278,816	$	293,613
Available federal funds lines		105,000		55,000

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Junior Subordinated Debentures (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Junior Subordinated Debentures by Issuance

At June 30, 2019 and December 31, 2018, theCompany’sjuniorsubordinateddebenturesby issuancewere as follows:

Name of Trust	Aggregate Principal Amount June 30, 2019			Aggregate Principal Amount December 31, 2018			Stated Maturity	Contractual Rate at June 30, 2019			Interest Rate Spread
MetropolitanStatutory Trust 1	$	35,000		$	35,000		March17, 2034		5.20	%	Three-month LIBOR + 2.79%
RidgeStone Capital Trust I		1,500			1,500		June 30, 2033		6.38	%	Five-year LIBOR + 3.50%
First Evanston Bancorp Trust I		10,000			10,000		March 15, 2035		4.19	%	Three-month LIBOR + 1.78%
Total liability, at par		46,500			46,500
Discount		(9,441	)		(9,732	)
Total liability, at carrying value	$	37,059		$	36,768

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Commitments and Contingent Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Summary of Minimum Annual Rental Commitments for Operating Leases

The minimumannualrentalcommitmentsforoperatingleasessubsequentto June 30, 2019, exclusiveof taxesand othercharges,aresummarizedas follows:

	MinimumRental Commitments
2019	$	2,173
2020		4,042
2021		3,589
2022		2,017
2023		1,077
Thereafter		3,156
Total	$	16,054

Summary of Contract or Notional Amount of Outstanding Loan and Lease Commitments

The followingtablesummarizesthecontractor notionalamountof outstandingloanand lease commitmentsatJune 30, 2019 and December 31, 2018:

	June 30, 2019						December 31, 2018
	Fixed Rate		VariableRate		Total		FixedRate		VariableRate		Total
Commitments to extend credit	$	62,653	$	942,348	$	1,005,001	$	74,099	$	928,991	$	1,003,090
Letters of credit		3,607		35,519		39,126		1,982		34,071		36,053
Total	$	66,260	$	977,867	$	1,044,127	$	76,081	$	963,062	$	1,039,143

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Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Company's Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The followingtablessummarizetheCompany’sfinancialassetsand liabilitiesthatwere measuredatfair valueon a recurringbasisat June 30, 2019 and December 31, 2018:

			Fair Value Measurements Using
June 30, 2019	Fair Value		Level 1		Level 2		Level 3
Financial assets
Securities available-for-sale
U.S. Treasury Notes	$	45,830	$	45,830	$	—	$	—
U.S. Government agencies		177,706		—		177,706		—
Obligations of states, municipalities, and political    subdivisions		89,918		—		89,723		195
Mortgage-backed securities; residential
Agency		352,411		—		352,411		—
Non-Agency		94,490		—		94,490		—
Mortgage-backed securities; commercial
Agency		123,394		—		123,394		—
Non-Agency		31,369		—		31,369		—
Corporate securities		38,899		—		38,899		—
Other securities		15,012		—		15,012		—
Equity and other securities, at fair value
Mutual funds		2,924		2,924		—		—
Equity securities		4,738		—		4,043		695
Servicing assets		19,760		—		—		19,760
Derivative assets		9,168		—		9,168		—
Financial liabilities
Derivative liabilities		9,607		—		9,607		—

			Fair Value Measurements Using
December 31, 2018	Fair Value		Level 1		Level 2		Level 3
Financial assets
Securities available-for-sale
U.S. Treasury Notes	$	52,667	$	52,667	$	—	$	—
U.S. Government agencies		186,498		—		186,498		—
Obligations of states, municipalities, and political    subdivisions		60,233		—		60,038		195
Mortgage-backed securities; residential
Agency		272,963		—		272,963		—
Non-Agency		83,621		—		83,621		—
Mortgage-backed securities; commercial
Agency		90,434		—		90,434		—
Non-Agency		30,458		—		30,458		—
Corporate securities		34,173		—		34,173		—
Other securities		6,609		2,844		3,074		691
Servicing assets		19,693		—		—		19,693
Derivative assets		10,740		—		10,740		—
Financial liabilities
Derivative liabilities		4,243		—		4,243		—

Summary of Financial Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs

The following table presents additional information about financial assets measured at fair value on recurring basis for which the Company used significant unobservable inputs (Level 3):

	Six Months Ended June 30,
	2019		2018		2019			2018
	Investment Securities				Servicing Assets
Balance, beginning of period	$	886	$	1,052	$	19,693		$	21,400
Acquired assets at fair value		—		314		—			—
Additions, net		—		—		2,551			4,148
Amortization		3		3		—			—
Change in unrealized gain		1		11		—			—
Change in fair value		—		—		(2,484	)		(3,961	)
Balance, end of period	$	890	$	1,380	$	19,760		$	21,587

Summary of Unobservable Inputs Used in the Fair Value Measurements on Recurring Basis

The followingtablepresentsadditionalinformationabouttheunobservableinputsused in thefairvalue measurementson recurringbasisthatwere categorizedwithinLevel3 of thefairvaluehierarchyas of June 30, 2019:

Financial Instruments	Valuation Technique	Unobservable Inputs	Range of Inputs	Weighted Average Range	Impact to Valuation from an Increased or Higher Input Value
Obligations of states,    municipalities, and    political obligations	Discountedcash flow	Probability of default	2.4%	2.4%	Decrease
Single issuer trust preferred	Discounted cash flow	Probability of default	4.9%—5.4%	5.9%	Decrease
Servicing assets	Discounted cash flow	Prepayment speeds	2.8%—20.0%	12.9%	Decrease
		Discount rate	6.4%—23.4%	13.5%	Decrease
		Expected weighted average loan life	0.1—10.0 years	4.7 years	Increase

Summary of Company's Assets Measured at Fair Value on a Non-Recurring Basis

The following tablessummarizetheCompany’sassetsthatwere measuredatfairvalueon a non-recurringbasis,excluding acquiredimpairedloans,as of June 30, 2019 and December 31, 2018:

			Fair Value Measurements Using
June 30, 2019	Fair Value		Level 1		Level 2		Level 3
Non-recurring
Impaired loans
(excluding acquired impaired loans)
Commercial real estate	$	15,932	$	—	$	—	$	15,932
Residential real estate		2,877		—		—		2,877
Commercial and industrial		17,789		—		—		17,789
Assets held for sale		16,329		—		—		16,329
Other real estate owned		8,070		—		—		8,070

			Fair Value Measurements Using
December 31, 2018	Fair Value		Level 1		Level 2		Level 3
Non-recurring
Impaired loans
(excluding acquired impaired loans)
Commercial real estate	$	9,792	$	—	$	—	$	9,792
Residential real estate		2,076		—		—		2,076
Commercial and industrial		17,397		—		—		17,397
Assets held for sale		14,489		—		—		14,489
Other real estate owned		5,314		—		—		5,314

Estimated Fair Values of Financial Instruments

The estimatedfairvaluesof financialinstruments not carried at fair value and levelswithinthefairvaluehierarchyareas follows:

			June 30,				December 31,
	Fair Value		2019				2018
	Hierarchy Level		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial assets
Cash and due from banks		1	$	57,513	$	57,513	$	30,190	$	30,190
Interest bearing deposits with other banks		2		31,802		31,802		91,670		91,670
Securities held-to-maturity		2		4,421		4,488		99,266		97,739
Other restricted stock		2		22,937		22,937		19,202		19,202
Loans held for sale		3		18,473		20,625		19,827		21,654
Loans and lease receivables, net (less impaired loans    at fair value(1)		3		3,795,418		3,702,441		3,447,160		3,407,652
Accrued interest receivable		3		12,913		12,913		10,863		10,863
Financial liabilities
Non-interest-bearing deposits		2		1,240,375		1,240,375		1,192,873		1,192,873
Interest-bearing deposits		2		2,819,868		2,828,014		2,557,043		2,554,329
Accrued interest payable		2		4,522		4,522		3,484		3,484
Line of credit		2		—		—		—		—
Federal Home Loan Bank advances		2		500,000		500,000		425,000		425,000
Securities sold under repurchase agreement		2		32,885		32,885		34,166		34,166
Junior subordinated debentures		3		37,059		42,310		36,768		42,351

(1) In accordance with the prospective adoption of ASU 2016-01, the fair value of loans and lease receivables, net (less impaired loans at fair value) as of June 30, 2019 was measured using an exit price notion. The fair value as of December 31, 2018 was measured using an entry price notion.

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Derivative Instruments and Hedge Activities (Tables)

6 Months Ended

Jun. 30, 2019

Summary of Derivative Financial Instruments and Classification on Consolidated Statements of Financial Condition

The following tables present the fair value of the Company’s derivative financial instruments and classification on the Consolidated Statements of Financial Condition as of June 30, 2019 and December 31, 2018:

	June 30, 2019						December 31, 2018
			Fair Value						Fair Value
	Notional Amount		Other Assets		Other Liabilities		Notional Amount		Other Assets		Other Liabilities
Derivatives designated as hedging instruments
Interest rate swaps designated as cash     flow hedges	$	250,000	$	1,456	$	1,316	$	250,000	$	6,699	$	—
Derivatives not designated as hedging instruments
Other interest rate derivatives		286,798		7,712		8,280		294,545		4,041		4,237
Other credit derivatives		4,262		—		11		4,424		—		6
Total derivatives	$	541,060	$	9,168	$	9,607	$	548,969	$	10,740	$	4,243

Summary of Net Gains (Losses) Recorded in Accumulated Other Comprehensive Income (Loss) and Consolidated Statements of Operations Relating to Cash Flow Derivative Instruments

The following table reflects the net gains (losses) recorded in accumulated other comprehensive income (loss) and the Consolidated Statements of Operations relating to the cash flow derivative instruments for the six months ended: 

	June 30, 2019							June 30, 2018
	Amount of Loss Recognized in OCI			Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense		Amount of Gain (Loss) Recognized in Other Non-Interest Income		Amount of Gain Recognized in OCI		Amount of Gain Reclassified from OCI to Income as an Increase to Interest Expense		Amount of Gain (Loss) Recognized in Other Non-Interest Income
Interest rate swaps	$	(5,234	)	$	1,280	$	—	$	5,632	$	435	$	—

Summary of Other Interest Rate Derivatives

The following table reflects other interest rate derivatives as of June 30, 2019

Notional amounts	$	286,798
Derivative assets fair value		7,712
Derivative liabilities fair value		8,280
Weighted average pay rates		4.74	%
Weighted average receive rates		4.56	%
Weighted average maturity	7.0 years

Summary of Company's Interest Rate Derivative and Offsetting Positions

The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative asset and liabilities on the Consolidated Statements of Financial Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of: 

	June 30, 2019						December 31, 2018
	Derivative Assets Fair Value			Derivative Liabilities Fair Value			Derivative Assets Fair Value			Derivative Liabilities Fair Value
Gross amounts recognized	$	9,168		$	9,607		$	10,740		$	4,243
Less: Amounts offset in the Consolidated Statements of    Financial Condition		—			—			—			—
Net amount presented in the Consolidated Statements of    Financial Condition	$	9,168		$	9,607		$	10,740		$	4,243
Gross amounts not offset in the Consolidated Statements of    Financial Condition
Offsetting derivative positions		(1,478	)		(1,478	)		(2,823	)		(2,823	)
Collateral posted		(7,690	)		(8,129	)		(7,917	)		(1,317	)
Net credit exposure	$	—		$	—		$	—		$	103

Cash Flow Hedges

Summary of Cash Flow Hedges

The following table reflects the cash flow hedges as of June 30, 2019:

Notional amounts	$	250,000
Derivative assets fair value		1,456
Derivative liabilities fair value		—
Weighted average pay rates		1.67	%
Weighted average receive rates		2.61	%
Weighted average maturity	2.7 years

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Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock Compensation Expense

The following table summarizes stock option compensation expense for the six months ended June 30, 2019 and 2018:

	Six Months Ended June 30,
	2019			2018
Total share-based compensation (benefit) - stock options	$	(133	)	$	450
Income tax benefit (expense)		(37	)		125
Unrecognized compensation expense - stock options		35			271
Weighted-average amortization period remaining	0.7 years			1.3 years

Restricted Shares

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock Compensation Expense

The following table summarizes restricted stock compensation expense for the six months ended June 30, 2019 and 2018:

	Six Months Ended June 30,
	2019		2018
Total share-based compensation - restricted stock	$	807	$	326
Income tax benefit		225		91
Unrecognized compensation expense		4,829		3,691
Weighted-average amortization period remaining	3.0 years		3.3 years

Omnibus Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Changes in Restricted Shares

The following table discloses the changes in restricted shares for the six months ended June 30, 2019:

	Omnibus Plan
	Number of Shares			Weighted Average Grant Date Fair Value
Beginning balance, January 1, 2019		196,480		$	21.66
Granted		141,207			19.09
Vested		(35,889	)		22.07
Forfeited		(13,238	)		20.33
Ending balance outstanding at June 30, 2019		288,560		$	20.41

BYB Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Fair Value Assumptions of Stock Options

The fair values of the stock options were determined using the Black-Scholes-Merton model for Time Options and a Monte Carlo simulation model for Performance Options.

Summary of Activity in shares Subjected to Options and Weighted Average Exercise Prices

The following table discloses the activity in shares subject to options and the weighted average exercise prices, in actual dollars, for the six months ended June 30, 2019:

	BYB Plan
	Number of Shares			Weighted Average Exercise Price		Intrinsic Value		Weighted Average Remaining Contractual Term (in Years)
Beginning balance, January 1, 2019		1,598,872		$	11.84	$	7,713		6.6
Exercised		(86,000	)		16.25	$	245
Forfeited		(60,800	)		16.25
Ending balance outstanding at    June 30, 2019		1,452,072		$	11.39	$	11,225		6.0
Exercisable at June 30, 2019		1,414,572		$	11.26	$	11,118		6.0

FEB Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity in shares Subjected to Options and Weighted Average Exercise Prices

The following table discloses the activity in shares subject to options under the FEB Plan and the weighted average exercise prices, in actual dollars, for the six months ended June 30, 2019:

	FEB Plan
	Number of Shares			Weighted Average Exercise Price		Intrinsic Value		Weighted Average Remaining Contractual Term (in Years)
Beginning balance, January 1, 2019		624,383		$	11.31	$	3,339		5.2
Granted		—
Expired		—
Exercised		(80,710	)		11.24	$	673
Forfeited		—
Ending balance outstanding at    June 30, 2019		543,673		$	11.32	$	4,239		4.8
Exercisable at June 30, 2019		543,673		$	11.32	$	4,239		4.8

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Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Schedule of Calculation of Basic and Diluted Earnings per Share

The following represent the calculation of basic and diluted earnings per share for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Net income	$	13,211	$	2,768	$	25,808	$	9,536
Less: Dividends on preferred shares		195		198		391		391
Net income available to common stockholders	$	13,016	$	2,570	$	25,417	$	9,145
Weighted-average common stock outstanding:
Weighted-average common stock outstanding    (basic)		37,263,352		31,614,973		36,719,436		30,459,495
Incremental shares		684,654		953,423		725,971		988,825
Weighted-average common stock outstanding (dilutive)		37,948,006		32,568,396		37,445,407		31,448,320
Basic earnings per common share	$	0.35	$	0.08	$	0.69	$	0.30
Diluted earnings per common share	$	0.34	$	0.08	$	0.68	$	0.29

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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Summary of Preferred and Common Stock

A summary of the Company’s preferred and common stock at June 30, 2019 and December 31, 2018 is as follows:

	June 30,		December 31,
	2019		2018
Series B 7.5% fixed to floating non-cumulative    perpetual preferred stock
Par value	$	0.01	$	0.01
Shares authorized		50,000		50,000
Shares issued		10,438		10,438
Shares outstanding		10,438		10,438
Common stock, voting
Par value	$	0.01	$	0.01
Shares authorized		150,000,000		150,000,000
Shares issued		38,115,219		36,343,239
Shares outstanding		38,115,219		36,343,239

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Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2019

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in accumulated other comprehensive income (loss) for the six months ended June 30, 2019 and 2018:

(dollars in thousands)	Unrealized Gains (Losses) on Cash Flow Hedges			UnrealizedGains (Losses) on Available-for -Sale Securities			Total Accumulated Other Comprehensive Income (Loss)
Balance, January 1, 2018	$	2,913		$	(8,000	)	$	(5,087	)
Reclassification of certain income tax effects from    accumulated other comprehensive income		687			(1,450	)		(763	)
Other comprehensive income (loss), net of tax		3,750			(8,235	)		(4,485	)
Balance, June 30, 2018	$	7,350		$	(17,685	)	$	(10,335	)
Balance, January 1, 2019	$	4,763		$	(14,261	)	$	(9,498	)
Adoption of ASU 2016-01		—			(1,440	)		(1,440	)
Other comprehensive income (loss), net of tax		(4,699	)		14,289			9,590
Balance, June 30, 2019	$	64		$	(1,412	)	$	(1,348	)

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Basis of Presentation - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019 segment
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of reportable segments	1

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Accounting Pronouncements Recently Adopted or Issued - Additional Information (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in ATM and interchange fees				$ (1,440,000)
Equity and other securities, at fair value		$ 7,662,000		7,662,000
ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in ATM and interchange fees		$ 381,000	$ 291,000	$ 727,000	$ 596,000
ASU 2016-01
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification from other comprehensive income to retained earnings	$ 1,400,000
Equity and other securities, at fair value						$ 6,600,000
ASU 2017-12
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of securities held-to-maturity to securities available-for-sale	$ 94,800,000

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Accounting Pronouncements Recently Adopted or Issued - Impact of Adopting the New Revenue Standard on Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Non-interest income:
ATM and interchange fees	$ 945	$ 850	$ 1,662	$ 1,763
Non-interest expense:
Other non-interest expense	2,711	2,137	5,679	3,889
Balance without Adoption of ASC 606 | ASU 2014-09
Non-interest income:
ATM and interchange fees	1,326	1,141	2,389	2,359
Non-interest expense:
Other non-interest expense	3,092	2,428	6,406	4,485
Effect of Change | ASU 2014-09
Non-interest income:
ATM and interchange fees	(381)	(291)	(727)	(596)
Non-interest expense:
Other non-interest expense	$ (381)	$ (291)	$ (727)	$ (596)

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Acquisitions - Additional Information (Details) - USD ($)				3 Months Ended		6 Months Ended
	May 15, 2019	Apr. 30, 2019	May 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill				$ 145,638,000	$ 127,536,000	$ 145,638,000	$ 127,536,000	$ 128,177,000	$ 128,177,000	$ 54,562,000	$ 54,562,000
Oak Park River Forest Bankshares, Inc.
Business Acquisition [Line Items]
Business acquisition date of agreement						Apr. 30, 2019
Right to receive common stock upon conversion		7.9321
Consideration paid in cash	$ 4,200,000	$ 6,163,000
Common stock outstanding value per share		$ 33.375
Common stock issued price per share		$ 20.02
Issuance of common shares		1,464,558
Value of common stock consideration		$ 29,300,000
Options to acquire common stock shares		35,870
Option to acquire common stock value		$ 4,200,000
Total merger consideration		35,483,000
Stock issuance costs		429,000
Goodwill		$ 17,461,000
Oak Park River Forest Bankshares, Inc. | Non-interest Expense
Business Acquisition [Line Items]
Acquisition advisory expenses				2,400,000		$ 2,500,000
Core system conversion expenses				703,000		$ 703,000
First Evanston Bancorp, Inc.
Business Acquisition [Line Items]
Business acquisition date of agreement						May 31, 2018
Right to receive common stock upon conversion			3.994
Consideration paid in cash			$ 27,004,000
Common stock outstanding value per share			$ 16.136
Common stock issued price per share			$ 21.62
Issuance of common shares			6,682,850
Value of common stock consideration			$ 144,500,000
Options to acquire common stock shares			144,090
Option to acquire common stock value			$ 7,600,000
Total merger consideration			179,131,000
Stock issuance costs			852,000
Goodwill			$ 73,615,000
Options to acquire conversion of common stock shares			680,787
First Evanston Bancorp, Inc. | Non-interest Expense
Business Acquisition [Line Items]
Acquisition advisory expenses				0	1,500,000	$ 0	1,600,000
Core system conversion expenses				$ 394,000	$ 9,000,000	$ 1,900,000	$ 9,000,000

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Acquisitions - Summary of Fair Values of Assets and Liabilities Assumed as of Acquisition Dates (Details) - USD ($) $ in Thousands	May 15, 2019	Apr. 30, 2019	May 31, 2018	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Consideration paid
Goodwill				$ 145,638	$ 128,177	$ 128,177	$ 127,536	$ 54,562	$ 54,562
Oak Park River Forest Bankshares, Inc.
Assets
Cash and cash equivalents		$ 10,469
Securities available-for-sale		30,343
Restricted stock		414
Loans		261,151
Premises and equipment		3,488
Other real estate owned		2,201
Other intangible assets		6,220
Bank-owned life insurance		3,485
Deferred tax assets, net		4,887
Other assets		1,256
Total assets acquired		323,914
Liabilities
Deposits		290,171
Line of credit		5,655
Federal Home Loan Bank advances		5,300
Accrued expenses and other liabilities		4,766
Total liabilities assumed		305,892
Net assets acquired		18,022
Consideration paid
Common stock (2019 - 1,464,558 shares issued at $20.02 per share, 2018 - 6,682,850 shares issued at $21.62 per share)		29,320
Consideration paid in cash	$ 4,200	6,163
Total consideration paid		35,483
Goodwill		$ 17,461
First Evanston Bancorp, Inc.
Assets
Cash and cash equivalents			$ 47,378
Securities available-for-sale			128,063
Restricted stock			1,360
Loans			916,011
Premises and equipment			15,890
Other intangible assets			22,276
Deferred tax assets, net			2,302
Other assets			8,845
Total assets acquired			1,142,125
Liabilities
Deposits			1,022,268
Junior subordinated debentures			8,497
Accrued expenses and other liabilities			5,844
Total liabilities assumed			1,036,609
Net assets acquired			105,516
Consideration paid
Common stock (2019 - 1,464,558 shares issued at $20.02 per share, 2018 - 6,682,850 shares issued at $21.62 per share)			144,483
Outstanding stock options converted to Byline stock options			7,644
Consideration paid in cash			27,004
Total consideration paid			179,131
Goodwill			$ 73,615

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Acquisitions - Summary of Fair Values of Assets and Liabilities Assumed as of Acquisition Dates (Parenthetical) (Details) - $ / shares	Apr. 30, 2019	May 31, 2018
Oak Park River Forest Bankshares, Inc.
Business Acquisition [Line Items]
Stock issued (in shares)	1,464,558
Stock issued (in dollars per share)	$ 20.02
First Evanston Bancorp, Inc.
Business Acquisition [Line Items]
Stock issued (in shares)		6,682,850
Stock issued (in dollars per share)		$ 21.62

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Acquisitions - Summary of Acquired Non-Impaired Loans as of Acquisition Dates (Details) - USD ($) $ in Thousands		Apr. 30, 2019	May 31, 2018
Oak Park River Forest Bankshares, Inc.
Business Acquisition [Line Items]
Fair value		$ 212,587
Gross contractual amounts receivable		275,553
Estimate of contractual cash flows not expected to be collected	[1]	23,932
Estimate of contractual cash flows expected to be collected		$ 251,621
First Evanston Bancorp, Inc.
Business Acquisition [Line Items]
Fair value			$ 890,986
Gross contractual amounts receivable			1,057,374
Estimate of contractual cash flows not expected to be collected	[1]		36,544
Estimate of contractual cash flows expected to be collected			$ 1,020,830

[1] Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

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Acquisitions - Summary of Unaudited Pro Forma Information for Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Combinations [Abstract]
Total revenues (net interest income and non-interest income)	$ 69,874	$ 68,041	$ 136,770	$ 131,636
Net income	$ 14,909	$ 14,280	$ 29,460	$ 26,372
Earnings per share—basic	$ 0.39	$ 0.38	$ 0.77	$ 0.69
Earnings per share—diluted	$ 0.38	$ 0.37	$ 0.76	$ 0.68

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Securities - Summary of Amortized Cost and Fair Values of Securities Available-for-sale (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 967,634	$ 834,254
Available-for-sale Securities, Gross Unrealized Gains	6,987	3,130
Available-for-sale Securities, Gross Unrealized Losses	(5,592)	(19,728)
Available-for-sale Securities, Fair Value	969,029	817,656
U.S. Treasury Notes
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	45,348	52,775
Available-for-sale Securities, Gross Unrealized Gains	482	81
Available-for-sale Securities, Gross Unrealized Losses		(189)
Available-for-sale Securities, Fair Value	45,830	52,667
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	176,425	187,427
Available-for-sale Securities, Gross Unrealized Gains	1,434	367
Available-for-sale Securities, Gross Unrealized Losses	(153)	(1,296)
Available-for-sale Securities, Fair Value	177,706	186,498
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	88,240	60,686
Available-for-sale Securities, Gross Unrealized Gains	1,695	133
Available-for-sale Securities, Gross Unrealized Losses	(17)	(586)
Available-for-sale Securities, Fair Value	89,918	60,233
Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	354,480	284,038
Available-for-sale Securities, Gross Unrealized Gains	1,820	101
Available-for-sale Securities, Gross Unrealized Losses	(3,889)	(11,176)
Available-for-sale Securities, Fair Value	352,411	272,963
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	94,471	84,998
Available-for-sale Securities, Gross Unrealized Gains	418	199
Available-for-sale Securities, Gross Unrealized Losses	(399)	(1,576)
Available-for-sale Securities, Fair Value	94,490	83,621
Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	123,639	93,543
Available-for-sale Securities, Gross Unrealized Gains	765	55
Available-for-sale Securities, Gross Unrealized Losses	(1,010)	(3,164)
Available-for-sale Securities, Fair Value	123,394	90,434
Non-Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	31,302	31,458
Available-for-sale Securities, Gross Unrealized Gains	83
Available-for-sale Securities, Gross Unrealized Losses	(16)	(1,000)
Available-for-sale Securities, Fair Value	31,369	30,458
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	38,717	34,716
Available-for-sale Securities, Gross Unrealized Gains	290	67
Available-for-sale Securities, Gross Unrealized Losses	(108)	(610)
Available-for-sale Securities, Fair Value	38,899	34,173
Other Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	15,012	4,613
Available-for-sale Securities, Gross Unrealized Gains		2,127
Available-for-sale Securities, Gross Unrealized Losses		(131)
Available-for-sale Securities, Fair Value	$ 15,012	$ 6,609

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Securities - Summary of Amortized Cost and Fair Values of Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	$ 4,421	$ 99,266
Held-to-maturity Securities, Gross Unrealized Gains	67	133
Held-to-maturity Securities, Gross Unrealized Losses		(1,660)
Held-to-maturity Securities, Fair Value	4,488	97,739
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	4,421	23,835
Held-to-maturity Securities, Gross Unrealized Gains	67	40
Held-to-maturity Securities, Gross Unrealized Losses		(210)
Held-to-maturity Securities, Fair Value	$ 4,488	23,665
Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost		40,082
Held-to-maturity Securities, Gross Unrealized Gains		93
Held-to-maturity Securities, Gross Unrealized Losses		(531)
Held-to-maturity Securities, Fair Value		39,644
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost		35,349
Held-to-maturity Securities, Gross Unrealized Losses		(919)
Held-to-maturity Securities, Fair Value		$ 34,430

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Securities - Additional Information (Details)		3 Months Ended		6 Months Ended
	Jan. 01, 2019 USD ($)	Jun. 30, 2019 USD ($) Security	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Security	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Schedule Of Investments [Line Items]
Trading securities		$ 0		$ 0		$ 0
Equity and other securities, at fair value		7,662,000		7,662,000
Net gains or (losses) reclassified from accumulated other comprehensive income (loss) into earnings		973,000	$ 4,000	973,000	$ 4,000
Carrying amount of securities pledged as collateral		$ 298,300,000		$ 298,300,000		$ 244,700,000
Minimum
Schedule Of Investments [Line Items]
Percentage of shareholders equity for which securities holdings exceeds for no issuer other than U.S. Government and agencies		10.00%		10.00%		10.00%
Federal Home Loan Bank Advances
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral		$ 0		$ 0		$ 0
Public Fund Deposits
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral		250,000,000		250,000,000		197,800,000
Customer Repurchase Agreements
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral		$ 48,300,000		$ 48,300,000		46,900,000
Available-for-sale Securities
Schedule Of Investments [Line Items]
Investment securities with unrealized losses | Security		83		83
Held-to-maturity Securities
Schedule Of Investments [Line Items]
Investment securities with unrealized losses | Security		0		0
ASU 2016-01
Schedule Of Investments [Line Items]
Reclassification from other comprehensive income to retained earnings	$ 1,400,000
Equity and other securities, at fair value						$ 6,600,000
ASU 2017-12
Schedule Of Investments [Line Items]
Reclassification of securities held-to-maturity to securities available-for-sale	$ 94,800,000

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Securities - Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Available-for-sale (Details) $ in Thousands	Jun. 30, 2019 USD ($) Security	Dec. 31, 2018 USD ($) Security
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	83	179
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 14,163	$ 191,761
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(50)	(2,441)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	419,683	427,243
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(5,542)	(17,287)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	433,846	619,004
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (5,592)	$ (19,728)
U.S. Treasury Notes
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security		18
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		$ 23,835
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses		(52)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		9,865
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses		(137)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value		33,700
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses		$ (189)
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	7	25
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 367	$ 43,487
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1)	(80)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	41,223	50,101
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(152)	(1,216)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	41,590	93,588
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (153)	$ (1,296)
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	7	56
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		$ 13,926
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses		(97)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 4,792	18,563
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(17)	(489)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	4,792	32,489
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (17)	$ (586)
Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	45	42
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		$ 4,288
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses		(45)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 244,457	254,121
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(3,889)	(11,131)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	244,457	258,409
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (3,889)	$ (11,176)
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	10	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		$ 59,107
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses		(1,378)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 59,976	4,009
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(399)	(198)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	59,976	63,116
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (399)	$ (1,576)
Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	8	9
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 11,273	$ 21,356
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(31)	(447)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	50,907	52,640
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(979)	(2,717)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	62,180	73,996
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,010)	$ (3,164)
Non-Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	1	5
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 10,322	$ 30,458
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(16)	(1,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	10,322	30,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (16)	$ (1,000)
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	5	15
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 2,523	$ 25,762
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(18)	(342)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	8,006	4,642
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(90)	(268)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	10,529	30,404
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (108)	$ (610)
Other Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security		1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		$ 2,844
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses		(131)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value		2,844
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses		$ (131)

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Securities - Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Held-to-maturity (Details) $ in Thousands	Dec. 31, 2018 USD ($) Security
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	46
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 36,251
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(711)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	42,862
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(949)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	79,113
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,660)
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	23
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 8,127
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(58)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	8,792
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(152)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	16,919
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (210)
Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	16
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 6,625
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(150)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	21,139
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(381)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	27,764
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (531)
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Number of Securities | Security	7
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 21,499
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(503)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	12,931
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(416)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Fair Value	34,430
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (919)

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Securities - Summary of Proceeds From Sales of Securities Available-for-sale and Associated Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Available For Sale Securities Gross Realized Gain Loss [Abstract]
Proceeds	$ 59,594	$ 544	$ 59,594	$ 544
Gross gains	1,049	$ 4	1,049	$ 4
Gross losses	$ 76		$ 76

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Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Equity and Other Securities, Amortized Cost [Abstract]
Equity and Other Securities, Due after ten years, Amortized Cost	$ 695
Equity and Other Securities, Not due at single maturity, Amortized Cost	6,967
Equity and Other Securities, Amortized Cost	7,662
Available-for-sale Securities Debt Maturities, Amortized Cost [Abstract]
Available-for-sale Securities, Due in one year or less, Amortized Cost	76,144
Available-for-sale Securities, Due from one to five years, Amortized Cost	143,846
Available-for-sale Securities, Due from five to ten years, Amortized Cost	98,622
Available-for-sale Securities, Due after ten years, Amortized Cost	45,130
Available-for-sale Securities, Amortized Cost	967,634	$ 834,254
Held-to-maturity Securities Debt Maturities, Amortized Cost [Abstract]
Held-to-maturity Securities, Due from one to five years, Amortized Cost	3,808
Held-to-maturity Securities, Due from five to ten years, Amortized Cost	613
Held-to-maturity Securities, Amortized Cost	4,421	99,266
Equity and Other Securities, Fair Value [Abstract]
Equity and Other Securities, Due after ten years, Fair Value	695
Equity and Other Securities, Not due at single maturity, Fair Value	6,967
Equity and Other Securities, Fair Value	7,662
Available-for-sale Securities Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Due in one year or less, Fair Value	76,267
Available-for-sale Securities, Due from one to five years, Fair Value	145,125
Available-for-sale Securities, Due from five to ten years, Fair Value	100,172
Available-for-sale Securities, Due after ten years, Fair Value	45,801
Available-for-sale Securities, Fair Value, Total	969,029	817,656
Held-to-maturity Securities Debt Maturities, Fair Value [Abstract]
Held-to-maturity Securities, Due from one to five years, Fair Value	3,862
Held-to-maturity Securities, Due from five to ten years, Fair Value	626
Held-to-maturity securities, Fair Value, Total	4,488	$ 97,739
Mortgage-Backed Securities
Available-for-sale Securities Debt Maturities, Amortized Cost [Abstract]
Available-for-sale Securities, Not due at single maturity, Amortized Cost	603,892
Available-for-sale Securities Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Not due at single maturity, Fair Value	$ 601,664

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Loan and Lease Receivables - Schedule of Outstanding Loan and Lease Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 3,859,841		$ 3,499,463
Net unamortized deferred fees and costs	232		(1,293)
Initial direct costs	3,075		3,456
Allowance for loan and lease losses	(31,132)	$ (27,106)	(25,201)	$ (19,687)	$ (17,640)	$ (16,706)
Net loans and leases	3,832,016		3,476,425
Lease financing receivables
Net minimum lease payments	201,848		204,646
Unguaranteed residual values	1,442		1,535
Unearned income	(17,945)		(18,384)
Total lease financing receivables	185,345		187,797
Initial direct costs	3,075		3,456
Lease financial receivables before allowance for lease losses	188,420		191,253
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,311,539		1,261,594
Allowance for loan and lease losses	(8,934)	(6,660)	(7,540)	(6,453)	(5,319)	(4,794)
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	777,762		704,899
Allowance for loan and lease losses	(2,171)	(1,970)	(1,751)	(1,648)	(1,564)	(1,638)
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	251,948		186,258
Allowance for loan and lease losses	(691)	(536)	(466)	(332)	(201)	(222)
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,320,338		1,145,240
Allowance for loan and lease losses	(17,126)	(15,630)	(12,932)	(8,369)	(7,763)	(7,418)
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	12,909		13,675
Allowance for loan and lease losses	(67)	(63)	(49)	(30)	(61)	(41)
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	185,345		187,797
Allowance for loan and lease losses	$ (2,143)	$ (2,247)	$ (2,463)	$ (2,855)	$ (2,732)	$ (2,593)

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Loan and Lease Receivables - Additional Information (Details) - USD ($)	Jun. 30, 2019	Apr. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	May 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 3,859,841,000			$ 3,499,463,000
Loans held for sale pledged as security for borrowings			$ 1,500,000,000	1,400,000,000
Allowance for loan and lease losses	31,132,000		27,106,000	25,201,000	$ 19,687,000		$ 17,640,000	$ 16,706,000
Acquired Impaired Loans
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan and lease losses	3,500,000			2,700,000
Acquired Impaired Loans | First Evanston Bancorp, Inc.
Accounts Notes And Loans Receivable [Line Items]
Loans acquired						$ 25,025,000
Acquired Impaired Loans | Oak Park River Forest Bankshares, Inc.
Accounts Notes And Loans Receivable [Line Items]
Loans acquired		$ 48,564,000
Acquired Non-Impaired Loans and Leases | Oak Park River Forest Bankshares, Inc.
Accounts Notes And Loans Receivable [Line Items]
Loans acquired	212,600,000
Acquired Non-Impaired Loans and Leases | First Evanston
Accounts Notes And Loans Receivable [Line Items]
Loans acquired	891,000,000
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	12,909,000			13,675,000
Overdraft deposits reclassified as loans			771,000	1,700,000
Allowance for loan and lease losses	$ 67,000		63,000	49,000	$ 30,000		$ 61,000	$ 41,000
U.S. Government Guaranteed Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases			$ 145,500,000	$ 108,700,000

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Loan and Lease Receivables - Summary of Minimum Annual Lease Payments for Lease Financing Receivables (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Receivables [Abstract]
2019	$ 37,931
2020	66,850
2021	47,648
2022	30,628
2023	15,308
Thereafter	3,483
Total	$ 201,848

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Loan and Lease Receivables - Summary of Balances for Each Respective Loan and Lease Category (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 3,863,148	$ 3,501,626	$ 3,348,692
Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	2,584,293	2,237,798
Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	294,551	277,542
Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	984,304	986,286
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,311,539	1,261,607	1,234,987
Commercial Real Estate | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	721,230	652,234
Commercial Real Estate | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	151,127	146,808
Commercial Real Estate | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	439,182	462,565
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	777,762	704,902	699,588
Residential Real Estate | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	501,038	466,309
Residential Real Estate | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	118,534	113,934
Residential Real Estate | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	158,190	124,659
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	251,948	185,349	188,616
Construction, Land Development, and Other Land | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	196,656	144,128
Construction, Land Development, and Other Land | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	4,220	3,779
Construction, Land Development, and Other Land | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	51,072	37,442
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,320,570	1,144,797	1,025,820
Commercial and Industrial | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	992,313	803,508
Commercial and Industrial | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	20,370	12,617
Commercial and Industrial | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	307,887	328,672
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	12,909	13,718	12,806
Installment and Other | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	10,937	11,718
Installment and Other | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	300	404
Installment and Other | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,672	1,596
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	188,420	191,253	$ 186,875
Lease Financing Receivables | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	162,119	159,901
Lease Financing Receivables | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 26,301	$ 31,352

XML

Loan and Lease Receivables - Estimated Fair Value of Impaired Loans Acquired at Acquisition (Details) - Acquired Impaired Loans - USD ($) $ in Thousands	Apr. 30, 2019	May 31, 2018
First Evanston Bancorp, Inc.
Accounts Notes And Loans Receivable [Line Items]
Undiscounted contractual cash flows		$ 33,594
Undiscounted cash flows not expected to be collected (non-accretable difference)		5,003
Undiscounted cash flows expected to be collected		28,591
Accretable yield at acquisition		(3,566)
Estimated fair value of impaired loans acquired at acquisition		$ 25,025
Oak Park River Forest Bankshares, Inc.
Accounts Notes And Loans Receivable [Line Items]
Undiscounted contractual cash flows	$ 65,223
Undiscounted cash flows not expected to be collected (non-accretable difference)	8,158
Undiscounted cash flows expected to be collected	57,065
Accretable yield at acquisition	(8,501)
Estimated fair value of impaired loans acquired at acquisition	$ 48,564

XML

Loan and Lease Receivables - Summary of Outstanding Balance and Carrying Amount of All Acquired Impaired Loans (Details) - Acquired Impaired Loans - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	$ 418,800	$ 428,768
Carrying Value	294,551	277,542
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	205,109	216,137
Carrying Value	151,127	146,808
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	169,171	173,962
Carrying Value	118,534	113,934
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	13,348	11,962
Carrying Value	4,220	3,779
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	30,041	24,972
Carrying Value	20,370	12,617
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Outstanding Balance	1,131	1,735
Carrying Value	$ 300	$ 404

XML

Loan and Lease Receivables - Summary of Changes in Accretable Yield for Acquired Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Receivables [Abstract]
Beginning balance	$ 29,340	$ 39,300	$ 37,115	$ 36,446
Additions	8,501	3,566	8,501	3,566
Accretion to interest income	(5,996)	(5,871)	(11,245)	(11,562)
Reclassification from nonaccretable difference, net	14,693	4,311	12,167	12,856
Ending balance	$ 46,538	$ 41,306	$ 46,538	$ 41,306

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Loan and Lease Receivables - Schedule of Unpaid Principal Balance and Carrying Value for Acquired Non-impaired Loans and Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	$ 3,863,148	$ 3,501,626	$ 3,348,692
Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	1,010,611	1,018,921
Loans and leases	984,304	986,286
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,311,539	1,261,607	1,234,987
Commercial Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	449,734	473,262
Loans and leases	439,182	462,565
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	777,762	704,902	699,588
Residential Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	160,844	127,478
Loans and leases	158,190	124,659
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	251,948	185,349	188,616
Construction, Land Development, and Other Land | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	52,459	38,494
Loans and leases	51,072	37,442
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,320,570	1,144,797	1,025,820
Commercial and Industrial | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	317,902	344,879
Loans and leases	307,887	328,672
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	12,909	13,718	12,806
Installment and Other | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	1,714	1,831
Loans and leases	1,672	1,596
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	188,420	191,253	$ 186,875
Lease Financing Receivables | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	27,958	32,977
Loans and leases	$ 26,301	$ 31,352

XML

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Allowance for Loan and Lease Losses and Corresponding Loan and Lease Balances (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Allowance for loan and lease losses
Beginning balance	$ 27,106	$ 17,640	$ 25,201	$ 16,706
Provisions	6,391	3,956	10,390	9,071
Charge-offs	(3,280)	(2,385)	(5,628)	(6,807)
Recoveries	915	476	1,169	717
Ending balance	31,132	19,687	31,132	19,687
Ending balance:
Individually evaluated for impairment					$ 9,286		$ 4,895
Collectively evaluated for impairment					18,371		12,041
Allowance for loan and lease losses	31,132	17,640	31,132	19,687	31,132	$ 25,201	19,687
Loans and leases ending balance:
Individually evaluated for impairment					45,884		33,573
Collectively evaluated for impairment					3,522,713		3,002,033
Total loans and leases					3,863,148	3,501,626	3,348,692
Loans Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality					3,475		2,751
Loans and leases ending balance:
Loans acquired with deteriorated credit quality					294,551		313,086
Commercial Real Estate
Allowance for loan and lease losses
Beginning balance	6,660	5,319	7,540	4,794
Provisions	2,695	1,336	3,137	2,270
Charge-offs	(818)	(202)	(2,169)	(611)
Recoveries	397		426
Ending balance	8,934	6,453	8,934	6,453
Ending balance:
Individually evaluated for impairment					2,775		2,199
Collectively evaluated for impairment					4,433		2,752
Allowance for loan and lease losses	6,660	5,319	8,934	6,453	8,934	7,540	6,453
Loans and leases ending balance:
Individually evaluated for impairment					18,707		16,397
Collectively evaluated for impairment					1,141,705		1,055,969
Total loans and leases					1,311,539	1,261,607	1,234,987
Commercial Real Estate | Loans Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality					1,726		1,502
Loans and leases ending balance:
Loans acquired with deteriorated credit quality					151,127		162,621
Residential Real Estate
Allowance for loan and lease losses
Beginning balance	1,970	1,564	1,751	1,638
Provisions	(62)	84	156	10
Charge-offs	(9)		(9)
Recoveries	272		273
Ending balance	2,171	1,648	2,171	1,648
Ending balance:
Individually evaluated for impairment					22		127
Collectively evaluated for impairment					1,559		1,171
Allowance for loan and lease losses	1,970	1,564	2,171	1,648	2,171	1,751	1,648
Loans and leases ending balance:
Individually evaluated for impairment					2,899		2,273
Collectively evaluated for impairment					656,329		567,578
Total loans and leases					777,762	704,902	699,588
Residential Real Estate | Loans Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality					590		350
Loans and leases ending balance:
Loans acquired with deteriorated credit quality					118,534		129,737
Construction, Land Development, and Other Land
Allowance for loan and lease losses
Beginning balance	536	201	466	222
Provisions	155	131	225	528
Charge-offs				(418)
Ending balance	691	332	691	332
Ending balance:
Collectively evaluated for impairment					676		310
Allowance for loan and lease losses	536	201	691	332	691	466	332
Loans and leases ending balance:
Collectively evaluated for impairment					247,728		183,756
Total loans and leases					251,948	185,349	188,616
Construction, Land Development, and Other Land | Loans Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality					15		22
Loans and leases ending balance:
Loans acquired with deteriorated credit quality					4,220		4,860
Commercial and Industrial
Allowance for loan and lease losses
Beginning balance	15,630	7,763	12,932	7,418
Provisions	3,320	1,956	6,352	5,380
Charge-offs	(1,827)	(1,596)	(2,179)	(4,681)
Recoveries	3	246	21	252
Ending balance	17,126	8,369	17,126	8,369
Ending balance:
Individually evaluated for impairment					6,489		2,555
Collectively evaluated for impairment					9,495		4,940
Allowance for loan and lease losses	15,630	7,763	17,126	8,369	17,126	12,932	8,369
Loans and leases ending balance:
Individually evaluated for impairment					24,278		14,889
Collectively evaluated for impairment					1,275,922		995,584
Total loans and leases					1,320,570	1,144,797	1,025,820
Commercial and Industrial | Loans Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality					1,142		874
Loans and leases ending balance:
Loans acquired with deteriorated credit quality					20,370		15,347
Installment and Other
Allowance for loan and lease losses
Beginning balance	63	61	49	41
Provisions	8	1	22	21
Charge-offs	(4)	(32)	(4)	(32)
Ending balance	67	30	67	30
Ending balance:
Individually evaluated for impairment							14
Collectively evaluated for impairment					65		13
Allowance for loan and lease losses	63	61	67	30	67	49	30
Loans and leases ending balance:
Individually evaluated for impairment							14
Collectively evaluated for impairment					12,609		12,271
Total loans and leases					12,909	13,718	12,806
Installment and Other | Loans Acquired with Deteriorated Credit Quality
Ending balance:
Loans acquired with deteriorated credit quality					2		3
Loans and leases ending balance:
Loans acquired with deteriorated credit quality					300		521
Lease Financing Receivables
Allowance for loan and lease losses
Beginning balance	2,247	2,732	2,463	2,593
Provisions	275	448	498	862
Charge-offs	(622)	(555)	(1,267)	(1,065)
Recoveries	243	230	449	465
Ending balance	2,143	2,855	2,143	2,855
Ending balance:
Collectively evaluated for impairment					2,143		2,855
Allowance for loan and lease losses	$ 2,247	$ 2,732	$ 2,143	$ 2,855	2,143	2,463	2,855
Loans and leases ending balance:
Collectively evaluated for impairment					188,420		186,875
Total loans and leases					$ 188,420	$ 191,253	$ 186,875

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	$ 4,000,000	$ 2,000,000	$ 5,900,000	$ 3,000,000
Commitments outstanding on troubled debt restructurings	500,000		500,000		$ 500,000
Recorded investment in troubled debt restructurings that subsequently defaulted within twelve months	348,000	340,000	348,000	340,000
Reserve for unfunded commitments	1,300,000		1,300,000		$ 1,200,000
Provisions for (credits to) unfunded commitments	183,000	(29,000)	28,000	84,000
Charge-offs or recoveries related to reserve for unfunded commitments	0	0	0	0
Individually Evaluated For Impairment
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	1,700,000	193,000	2,600,000	930,000
Collectively Evaluated For Impairment
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	1,700,000	2,600,000	2,600,000	3,200,000
Acquired Impaired Loans
Loans And Leases Receivable Disclosure [Line Items]
Increase (decrease) in allowance for loan and lease losses	$ 629,000	$ (778,000)	$ 740,000	$ (1,100,000)

XML

Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Recorded Investment, Unpaid Principal Balance, and Related Allowance for Loans and Leases Considered Impaired (Details) - Loans Excluding Acquired Impaired Loans - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable Impaired [Line Items]
Recorded Investment	$ 45,884	$ 35,914
Unpaid Principal Balance	54,165	41,231
Related Allowance	9,286	6,649
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	8,286	6,110
Recorded Investment, With an allowance recorded	10,421	5,873
Unpaid Principal Balance, With no related allowance recorded	11,436	7,693
Unpaid Principal Balance, With an allowance recorded	11,024	6,313
Related Allowance	2,775	2,191
Residential Real Estate
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	2,688	1,886
Recorded Investment, With an allowance recorded	211	251
Unpaid Principal Balance, With no related allowance recorded	2,742	1,858
Unpaid Principal Balance, With an allowance recorded	237	253
Related Allowance	22	61
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	11,873	11,193
Recorded Investment, With an allowance recorded	12,405	10,601
Unpaid Principal Balance, With no related allowance recorded	15,319	13,961
Unpaid Principal Balance, With an allowance recorded	13,407	11,153
Related Allowance	$ 6,489	$ 4,397

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Average Recorded Investment and Interest Income Recognized for Loans and Leases Considered Impaired (Details) - Loans Excluding Acquired Impaired Loans - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable Impaired [Line Items]
Average Recorded Investment	$ 40,517	$ 32,987
Interest Income Recognized	843	1,958
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded	8,094	10,013
Average Recorded Investment, With an allowance recorded	6,793	4,587
Interest Income Recognized, With no related allowance recorded	187	436
Interest Income Recognized, With an allowance recorded	155	183
Residential Real Estate
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded	1,785	1,959
Average Recorded Investment, With an allowance recorded	219	347
Interest Income Recognized, With no related allowance recorded	27	25
Interest Income Recognized, With an allowance recorded	4	3
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded	11,583	7,283
Average Recorded Investment, With an allowance recorded	12,043	8,784
Interest Income Recognized, With no related allowance recorded	223	99
Interest Income Recognized, With an allowance recorded	$ 247	233
Installment and Other
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With an allowance recorded		14
Interest Income Recognized, With an allowance recorded		$ 979

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Risk Rating Categories of Loans and Leases Considered for Inclusion in Allowance for Loan and Lease Losses Calculation (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	$ 3,863,148	$ 3,501,626	$ 3,348,692
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,311,539	1,261,607	1,234,987
Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	777,762	704,902	699,588
Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	251,948	185,349	188,616
Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,320,570	1,144,797	1,025,820
Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	12,909	13,718	12,806
Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	188,420	191,253	$ 186,875
Loans Excluding Acquired Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	3,568,597	3,224,084
Loans Excluding Acquired Impaired Loans | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,160,412	1,114,799
Loans Excluding Acquired Impaired Loans | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	659,228	590,968
Loans Excluding Acquired Impaired Loans | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	247,728	181,570
Loans Excluding Acquired Impaired Loans | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,300,200	1,132,180
Loans Excluding Acquired Impaired Loans | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	12,609	13,314
Loans Excluding Acquired Impaired Loans | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	188,420	191,253
Loans Excluding Acquired Impaired Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	3,140,123	2,870,431
Loans Excluding Acquired Impaired Loans | Pass | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,036,018	1,009,041
Loans Excluding Acquired Impaired Loans | Pass | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	620,414	553,665
Loans Excluding Acquired Impaired Loans | Pass | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	217,408	147,123
Loans Excluding Acquired Impaired Loans | Pass | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	1,068,796	962,291
Loans Excluding Acquired Impaired Loans | Pass | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	12,565	9,997
Loans Excluding Acquired Impaired Loans | Pass | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	184,922	188,314
Loans Excluding Acquired Impaired Loans | Watch
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	303,153	253,552
Loans Excluding Acquired Impaired Loans | Watch | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	87,111	76,276
Loans Excluding Acquired Impaired Loans | Watch | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	32,703	29,522
Loans Excluding Acquired Impaired Loans | Watch | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	30,320	31,376
Loans Excluding Acquired Impaired Loans | Watch | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	152,953	112,996
Loans Excluding Acquired Impaired Loans | Watch | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	38	3,302
Loans Excluding Acquired Impaired Loans | Watch | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	28	80
Loans Excluding Acquired Impaired Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	71,280	62,437
Loans Excluding Acquired Impaired Loans | Special Mention | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	16,837	17,602
Loans Excluding Acquired Impaired Loans | Special Mention | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	3,581	5,656
Loans Excluding Acquired Impaired Loans | Special Mention | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment [Line Items]
Total loans and leases		3,071
Loans Excluding Acquired Impaired Loans | Special Mention | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	48,567	34,314
Loans Excluding Acquired Impaired Loans | Special Mention | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	2,295	1,794
Loans Excluding Acquired Impaired Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	53,185	37,417
Loans Excluding Acquired Impaired Loans | Substandard | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	20,446	11,880
Loans Excluding Acquired Impaired Loans | Substandard | Residential Real Estate
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	2,530	2,125
Loans Excluding Acquired Impaired Loans | Substandard | Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	29,884	22,579
Loans Excluding Acquired Impaired Loans | Substandard | Installment and Other
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	6	15
Loans Excluding Acquired Impaired Loans | Substandard | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	319	818
Loans Excluding Acquired Impaired Loans | Doubtful
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	856	247
Loans Excluding Acquired Impaired Loans | Doubtful | Lease Financing Receivables
Financing Receivable Recorded Investment [Line Items]
Total loans and leases	$ 856	$ 247

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Contractual Delinquency Information (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	$ 3,863,148	$ 3,501,626	$ 3,348,692
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	1,311,539	1,261,607	1,234,987
Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	777,762	704,902	699,588
Construction, Land Development, and Other Land
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	251,948	185,349	188,616
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	1,320,570	1,144,797	1,025,820
Installment and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	12,909	13,718	12,806
Lease Financing Receivables
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	188,420	191,253	$ 186,875
Acquired Non-Impaired and Originated Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	51,892	50,297
Non-accrual	34,027	25,834
Current	3,516,705	3,173,787
Total loans and leases	3,568,597	3,224,084
Acquired Non-Impaired and Originated Loans | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	10,892	19,697
Acquired Non-Impaired and Originated Loans | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,977	4,766
Acquired Non-Impaired and Originated Loans | Greater than 90 Days and Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	996
Acquired Non-Impaired and Originated Loans | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	21,142	18,288
Non-accrual	12,220	9,484
Current	1,139,270	1,096,511
Total loans and leases	1,160,412	1,114,799
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	4,261	6,659
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,665	2,145
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | Greater than 90 Days and Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	996
Acquired Non-Impaired and Originated Loans | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,646	7,014
Non-accrual	2,335	1,815
Current	655,582	583,954
Total loans and leases	659,228	590,968
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,311	4,488
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		711
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment Past Due [Line Items]
Current	247,728	181,570
Total loans and leases	247,728	181,570
Acquired Non-Impaired and Originated Loans | Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	24,940	21,137
Non-accrual	18,610	13,932
Current	1,275,260	1,111,043
Total loans and leases	1,300,200	1,132,180
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	4,387	5,829
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,943	1,376
Acquired Non-Impaired and Originated Loans | Installment and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	144	1,948
Non-accrual	6	12
Current	12,465	11,366
Total loans and leases	12,609	13,314
Acquired Non-Impaired and Originated Loans | Installment and Other | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	88	1,932
Acquired Non-Impaired and Originated Loans | Installment and Other | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	50	4
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,020	1,910
Non-accrual	856	591
Current	186,400	189,343
Total loans and leases	188,420	191,253
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	845	789
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 319	$ 530

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of TDR's by Loan Category (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	25	22
Pre-Modification Outstanding Recorded Investment	$ 11,729	$ 11,039
Post-Modification Outstanding Recorded Investment	9,363	9,127
Charge-offs	2,366	1,912
Specific Reserves	$ 1,855	$ 2,246
Accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	7	7
Pre-Modification Outstanding Recorded Investment	$ 1,529	$ 1,813
Post-Modification Outstanding Recorded Investment	1,529	1,813
Specific Reserves	$ 324	$ 213
Non-accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	18	15
Pre-Modification Outstanding Recorded Investment	$ 10,200	$ 9,226
Post-Modification Outstanding Recorded Investment	7,834	7,314
Charge-offs	2,366	1,912
Specific Reserves	$ 1,531	$ 2,033
Commercial Real Estate | Accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	3	4
Pre-Modification Outstanding Recorded Investment	$ 1,105	$ 1,508
Post-Modification Outstanding Recorded Investment	1,105	1,508
Specific Reserves	$ 198	$ 113
Commercial Real Estate | Non-accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	10	9
Pre-Modification Outstanding Recorded Investment	$ 3,465	$ 2,512
Post-Modification Outstanding Recorded Investment	2,970	2,471
Charge-offs	495	41
Specific Reserves	$ 253	$ 743
Commercial and Industrial | Accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	2	2
Pre-Modification Outstanding Recorded Investment	$ 214	$ 191
Post-Modification Outstanding Recorded Investment	214	191
Specific Reserves	$ 126	$ 100
Commercial and Industrial | Non-accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	8	6
Pre-Modification Outstanding Recorded Investment	$ 6,735	$ 6,714
Post-Modification Outstanding Recorded Investment	4,864	4,843
Charge-offs	1,871	1,871
Specific Reserves	$ 1,278	$ 1,290
Residential Real Estate | Accruing
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	2	1
Pre-Modification Outstanding Recorded Investment	$ 210	$ 114
Post-Modification Outstanding Recorded Investment	$ 210	$ 114

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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Loans Modified as Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Receivables [Abstract]
Beginning balance	$ 1,921	$ 1,037	$ 1,813	$ 1,061
Additions		37	113	37
Net payments	(44)	(24)	(49)	(48)
Net transfers from (to) non-accrual	(348)	188	(348)	188
Ending balance	1,529	1,238	1,529	1,238
Beginning balance	7,119	1,093	7,314	1,569
Additions	1,182	5,332	1,428	5,332
Net payments	(815)	(461)	(726)	(793)
Charge-offs			(530)	(144)
Net transfers from (to) accrual	348	(188)	348	(188)
Ending balance	7,834	5,776	7,834	5,776
Total troubled debt restructurings	$ 9,363	$ 7,014	$ 9,363	$ 7,014

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Servicing Assets - Activity for Servicing Assets and Related Changes in Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Transfers And Servicing [Abstract]
Beginning balance	$ 19,534	$ 21,615	$ 19,693	$ 21,400
Additions, net	1,449	2,046	2,551	4,148
Changes in fair value	(1,223)	(2,074)	(2,484)	(3,961)
Ending balance	$ 19,760	$ 21,587	$ 19,760	$ 21,587

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Servicing Assets - Unpaid Principal Balances of Loans Serviced for Others (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Loan portfolios serviced for:
Unpaid principal balances of loans serviced	$ 1,281,687	$ 1,258,099
SBA guaranteed loans
Loan portfolios serviced for:
Unpaid principal balances of loans serviced	1,174,929	1,151,915
USDA guaranteed loans
Loan portfolios serviced for:
Unpaid principal balances of loans serviced	$ 106,758	$ 106,184

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Servicing Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounts Notes And Loans Receivable [Line Items]
Changes in fair value of servicing assets	$ (1,223)	$ (2,074)	$ (2,484)	$ (3,961)
Loan Servicing Revenue [Member]
Accounts Notes And Loans Receivable [Line Items]
Fees and charges	$ 2,630	$ 2,533	$ 5,169	$ 4,983

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Other Real Estate Owned - Change in Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Banking And Thrift [Abstract]
Other real estate owned, beginning balance	$ 4,799	$ 10,466	$ 5,314	$ 10,626
Acquisitions of OREO through business combination	2,201		2,201
Net additions to OREO	1,846	176	2,076	1,220
Proceeds from sales of OREO	(703)	(3,859)	(1,331)	(5,122)
Gains (losses) on sales of OREO	6	(249)	(27)	(109)
Valuation adjustments	(79)	(132)	(163)	(213)
Other real estate owned, ending balance	$ 8,070	$ 6,402	$ 8,070	$ 6,402

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Other Real Estate Owned - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Real Estate [Line Items]
Foreclosed real estate properties recorded as result of obtaining physical possession of property	$ 8,070,000	$ 6,402,000	$ 8,070,000	$ 6,402,000	$ 4,799,000	$ 5,314,000	$ 10,466,000	$ 10,626,000
Residential consumer mortgage loans in process of foreclosure	1,900,000		1,900,000			2,300,000
Proceeds from sale of internally financed sales of OREO	0	$ 444,000	183,000	$ 444,000
Residential Real Estate
Real Estate [Line Items]
Foreclosed real estate properties recorded as result of obtaining physical possession of property	$ 649,000		$ 649,000			$ 838,000

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Goodwill, Core Deposit Intangible and Other Intangible Assets - Summary of Changes in Goodwill, Core Deposit Intangible Assets and Customer Relationship Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance, Goodwill	$ 128,177	$ 54,562	$ 128,177	$ 54,562
Additions	17,461	72,974	17,461	72,974
Ending balance, Goodwill	145,638	127,536	145,638	127,536
Amortization	(1,959)	(1,130)	(3,732)	(1,897)
Core Deposits
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance	28,654	15,959	30,360	16,720
Additions	6,220	19,060	6,220	19,060
Amortization	(1,892)	(1,102)	(3,598)	(1,863)
Ending balance	32,982	33,917	32,982	33,917
Accumulated amortization	$ 22,484	$ 15,329	$ 22,484	$ 15,329
Weighted average remaining amortization period	7 years	7 years 4 months 24 days	7 years	7 years 4 months 24 days
Customer Relationships
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance	$ 2,992		$ 3,059
Additions		$ 3,216		$ 3,216
Amortization	(66)	(22)	(133)	(22)
Ending balance	2,926	3,194	2,926	3,194
Accumulated amortization	$ 290	$ 22	$ 290	$ 22
Weighted average remaining amortization period	10 years 10 months 24 days	11 years 10 months 24 days	10 years 10 months 24 days	11 years 10 months 24 days

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Goodwill, Core Deposit Intangible and Other Intangible Assets - Estimated Amortization Expense for Core Deposit Intangible, Customer Relationship Intangible and Other Intangible Assets Recognized (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
2019	$ 4,006
2020	7,571
2021	6,997
2022	6,426
2023	4,370
Thereafter	6,538
Total	$ 35,908	$ 33,419

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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2018
Income Tax [Line Items]
Effective tax rate		27.70%	20.00%
Net income tax benefit related to exercise of stock options		$ (65,000)	$ (65,000)
Net income tax benefit related to vesting of restricted shares		$ (211,000)	$ (211,000)
Corporate federal income tax rate		21.00%		35.00%
Net income tax benefit	$ (724,000)
Deferred tax assets, net		$ 35,700,000			$ 35,600,000
Oak Park River Forest Bankshares, Inc.
Income Tax [Line Items]
Deferred tax assets, net		$ 4,900,000

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Deposits - Composition of Deposits (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deposits [Abstract]
Non-interest-bearing demand deposits	$ 1,240,375	$ 1,192,873
Interest-bearing checking accounts	345,081	296,339
Money market demand accounts	728,954	640,401
Other savings	480,756	476,418
Time deposits (below $250,000)	980,162	911,603
Time deposits ($250,000 and above)	284,915	232,282
Total deposits	$ 4,060,243	$ 3,749,916

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Deposits - Additional Information (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Deposits [Abstract]
Brokered deposits	$ 70,000,000	$ 50,000,000

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Federal Home Loan Bank Advances - Summary of FHLB Advances (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
Federal Home Loan Bank advances	$ 500,000	$ 425,000
Weighted average cost	2.42%	2.56%

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Federal Home Loan Bank Advances - Additional Information (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank Advances [Line Items]
Federal home loan bank, total fixed-rate advances	$ 500,000,000
Federal home loan bank, required investment conversion ratio	0.045
Additional borrowing capacity from FHLB	$ 1,200,000,000	$ 1,300,000,000
Federal home loan bank advances maximum borrowing capacity as percentage of total assets	35.00%
Minimum
Federal Home Loan Bank Advances [Line Items]
Federal home loan bank advances, Fixed interest rate	2.40%
Federal home loan bank fixed rate advances, maturity date	2019-07
Maximum
Federal Home Loan Bank Advances [Line Items]
Federal home loan bank advances, Fixed interest rate	2.45%
Federal home loan bank fixed rate advances, maturity date	2019-09

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Other Borrowings - Summary of Other Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Apr. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 32,885		$ 34,166
Line of credit		$ 5,700
Total	$ 32,885		$ 34,166

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Other Borrowings - Additional Information (Details) - USD ($)			1 Months Ended		6 Months Ended
	Apr. 30, 2019	Oct. 11, 2018	May 31, 2019	Jul. 31, 2017	Jun. 30, 2019	Dec. 31, 2018	Apr. 30, 2017	Oct. 13, 2016
Line Of Credit Facility [Line Items]
Line of credit facility, amount	$ 5,700,000
Repayment of lines of credit			$ 5,700,000	$ 16,200,000	$ 11,335,000
Short-term credit lines available for use, outstanding					$ 0	$ 0
LIBOR Rate
Line Of Credit Facility [Line Items]
Interest rate spread	2.25%
Ridgestone | Correspondent Bank | Credit agreement
Line Of Credit Facility [Line Items]
Line of credit facility, amount								$ 30,000,000
Ridgestone | Correspondent Bank | Amended Credit Agreement
Line Of Credit Facility [Line Items]
Line of credit facility, revolving credit conversion to non-revolving line of credit, description					In April 2017, the revolving line of credit was amended to a non-revolving line of credit as long as the outstanding balance exceeds $5.0 million.
Line of credit facility, revolving credit conversion to non-revolving line of credit, threshold amount							$ 5,000,000
Threshold amount for conversion of line of credit into revolving line of credit							5,000,000
Revolving line of credit facility, maximum borrowing capacity							$ 5,000,000
Line of credit facility, maturity date					Oct. 11, 2018
Ridgestone | Correspondent Bank | Amended Credit Agreement | LIBOR Rate
Line Of Credit Facility [Line Items]
Interest rate spread					2.50%
Ridgestone | Correspondent Bank | Amended Credit Agreement | Prime Rate
Line Of Credit Facility [Line Items]
Interest rate spread					0.25%
Ridgestone | Correspondent Bank | Third Amendment Revolving Credit Agreement
Line Of Credit Facility [Line Items]
Line of credit facility, amount		$ 10,000,000			$ 0	$ 0
Line of credit facility, extended maturity date		Oct. 10, 2019
Line of credit facility, interest rate terms		The amended revolving line of credit bears interest at either the LIBOR plus 225 basis points or the Prime Rate minus 50 basis points, based on the Company’s election, which is required to be communicated at least three business days prior to the commencement of an interest period. If the Company fails to provide timely notification, the interest rate will be Prime Rate minus 50 basis points. At June 30, 2019 and December 31, 2018, the line of credit had no outstanding balance, therefore an interest rate option has not been selected.
Ridgestone | Correspondent Bank | Third Amendment Revolving Credit Agreement | LIBOR Rate
Line Of Credit Facility [Line Items]
Interest rate spread		2.25%
Ridgestone | Correspondent Bank | Third Amendment Revolving Credit Agreement | Prime Rate
Line Of Credit Facility [Line Items]
Interest rate spread		0.50%

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Other Borrowings - Summary of Short-term Credit Lines Available for Use (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Federal Reserve Bank of Chicago Discount Window Line
Debt Instrument [Line Items]
Short-term credit lines available for use	$ 278,816	$ 293,613
Available Federal Funds Line
Debt Instrument [Line Items]
Short-term credit lines available for use	$ 105,000	$ 55,000

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Junior Subordinated Debentures - Junior Subordinated Debentures by Issuance (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	$ 46,500	$ 46,500
Total liability, at carrying value	37,059	36,768
Metropolitan Statutory Trust 1
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	35,000	35,000
RidgeStone Capital Trust I
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	1,500	1,500
First Evanston Bancorp Trust I
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Total liability, at par	10,000	10,000
Junior Subordinated Debentures
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Discount	$ (9,441)	$ (9,732)
Junior Subordinated Debentures | Metropolitan Statutory Trust 1
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Stated Maturity	Mar. 17, 2034
Contractual Rate	5.20%	5.58%
Junior Subordinated Debentures | Metropolitan Statutory Trust 1 | Three-month LIBOR
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Interest Rate Spread, Description	Three-month LIBOR
Interest Rate Spread	2.79%	2.79%
Junior Subordinated Debentures | RidgeStone Capital Trust I
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Stated Maturity	Jun. 30, 2033
Contractual Rate	6.38%	6.38%
Junior Subordinated Debentures | RidgeStone Capital Trust I | Five-year LIBOR
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Interest Rate Spread, Description	Five-year LIBOR
Interest Rate Spread	3.50%	3.50%
Junior Subordinated Debentures | First Evanston Bancorp Trust I
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Stated Maturity	Mar. 15, 2035
Contractual Rate	4.19%	4.57%
Junior Subordinated Debentures | First Evanston Bancorp Trust I | Three-month LIBOR
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Interest Rate Spread, Description	Three-month LIBOR
Interest Rate Spread	1.78%	1.78%

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Junior Subordinated Debentures - Additional Information (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal amount	$ 46,500,000	$ 46,500,000
Accrued interest payable	4,522,000	3,484,000
Metropolitan Statutory Trust 1
Debt Instrument [Line Items]
Principal amount	$ 35,000,000	$ 35,000,000
Metropolitan Statutory Trust 1 | Junior Subordinated Debentures
Debt Instrument [Line Items]
Contractual rate	5.20%	5.58%
Accrued interest payable	$ 73,000	$ 84,000
Metropolitan Statutory Trust 1 | Junior Subordinated Debentures | Three-month LIBOR
Debt Instrument [Line Items]
Interest rate spread	2.79%	2.79%
RidgeStone Capital Trust I
Debt Instrument [Line Items]
Principal amount	$ 1,500,000	$ 1,500,000
RidgeStone Capital Trust I | Junior Subordinated Debentures
Debt Instrument [Line Items]
Contractual rate	6.38%	6.38%
Accrued interest payable	$ 0	$ 0
RidgeStone Capital Trust I | Junior Subordinated Debentures | Five-year LIBOR
Debt Instrument [Line Items]
Interest rate spread	3.50%	3.50%
First Evanston Bancorp Trust I
Debt Instrument [Line Items]
Principal amount	$ 10,000,000	$ 10,000,000
First Evanston Bancorp Trust I | Junior Subordinated Debentures
Debt Instrument [Line Items]
Contractual rate	4.19%	4.57%
Accrued interest payable	$ 18,000	$ 21,000
First Evanston Bancorp Trust I | Junior Subordinated Debentures | Three-month LIBOR
Debt Instrument [Line Items]
Interest rate spread	1.78%	1.78%

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Commitments and Contingent Liabilities - Summary of Minimum Annual Rental Commitments for Operating Leases (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Commitments And Contingencies Disclosure [Abstract]
2019	$ 2,173
2020	4,042
2021	3,589
2022	2,017
2023	1,077
Thereafter	3,156
Total	$ 16,054

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Commitments and Contingent Liabilities - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Commitments And Contingencies Liabilities [Line Items]
Rental expenses		$ 1,500,000	$ 1,600,000	$ 2,800,000	$ 2,800,000
Sublease income		190,000	175,000	370,000	346,000
Minimum rental to be received in future on subleases		1,500,000		$ 1,500,000
Sublease contract maturity year				2025
Data processing		$ 3,849,000	$ 10,371,000	$ 6,993,000	$ 12,672,000
Fixed rate loan commitments maturity year				2042
Variable rate loan commitments maturity year				2048
Maximum
Commitments And Contingencies Liabilities [Line Items]
Commitments to make loans period				90 days
Loan commitments fixed interest rate		15.00%		15.00%
Loan commitments variable interest rate		10.00%		10.00%
Minimum
Commitments And Contingencies Liabilities [Line Items]
Loan commitments fixed interest rate		2.48%		2.48%
Loan commitments variable interest rate		3.00%		3.00%
Contract termination
Commitments And Contingencies Liabilities [Line Items]
Data processing	$ 8,100,000
Remaining data processing cost balance		$ 0		$ 0

XML

Commitments and Contingent Liabilities - Summary of Contract or Notional Amount of Outstanding Loan and Lease Commitments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Commitments And Contingencies Liabilities [Line Items]
Fixed Rate	$ 66,260	$ 76,081
Variable Rate	977,867	963,062
Total	1,044,127	1,039,143
Commitments to Extend Credit
Commitments And Contingencies Liabilities [Line Items]
Fixed Rate	62,653	74,099
Variable Rate	942,348	928,991
Total	1,005,001	1,003,090
Letters of Credit
Commitments And Contingencies Liabilities [Line Items]
Fixed Rate	3,607	1,982
Variable Rate	35,519	34,071
Total	$ 39,126	$ 36,053

XML

Fair Value Measurement - Summary of Financial Assets And Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 969,029		$ 817,656
Servicing assets, at fair value	19,760	$ 19,534	19,693	$ 21,587	$ 21,615	$ 21,400
Derivative assets	9,168		10,740
Derivative liabilities	9,607		4,243
U.S. Treasury Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	45,830		52,667
U.S. Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	177,706		186,498
Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	89,918		60,233
Corporate Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	38,899		34,173
Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	15,012		6,609
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Servicing assets, at fair value	19,760		19,693
Derivative assets	9,168		10,740
Derivative liabilities	9,607		4,243
Fair Value, Measurements, Recurring | Mutual Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	2,924
Fair Value, Measurements, Recurring | Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	4,738
Fair Value, Measurements, Recurring | U.S. Treasury Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	45,830		52,667
Fair Value, Measurements, Recurring | U.S. Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	177,706		186,498
Fair Value, Measurements, Recurring | Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	89,918		60,233
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Residential | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	352,411		272,963
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Residential | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	94,490		83,621
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Commercial | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	123,394		90,434
Fair Value, Measurements, Recurring | Mortgage-Backed Securities; Commercial | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	31,369		30,458
Fair Value, Measurements, Recurring | Corporate Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	38,899		34,173
Fair Value, Measurements, Recurring | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	15,012		6,609
Fair Value, Measurements, Recurring | Level 1 | Mutual Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	2,924
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	45,830		52,667
Fair Value, Measurements, Recurring | Level 1 | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value			2,844
Fair Value, Measurements, Recurring | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets	9,168		10,740
Derivative liabilities	9,607		4,243
Fair Value, Measurements, Recurring | Level 2 | Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	4,043
Fair Value, Measurements, Recurring | Level 2 | U.S. Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	177,706		186,498
Fair Value, Measurements, Recurring | Level 2 | Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	89,723		60,038
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Residential | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	352,411		272,963
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Residential | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	94,490		83,621
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Commercial | Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	123,394		90,434
Fair Value, Measurements, Recurring | Level 2 | Mortgage-Backed Securities; Commercial | Non-Agency
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	31,369		30,458
Fair Value, Measurements, Recurring | Level 2 | Corporate Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	38,899		34,173
Fair Value, Measurements, Recurring | Level 2 | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	15,012		3,074
Fair Value, Measurements, Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Servicing assets, at fair value	19,760		19,693
Fair Value, Measurements, Recurring | Level 3 | Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	695
Fair Value, Measurements, Recurring | Level 3 | Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 195		195
Fair Value, Measurements, Recurring | Level 3 | Other Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value			$ 691

XML

Fair Value Measurement - Additional Information (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract]
Fair value, assets, to or from level 3 transfers, amount	$ 0	$ 0
Fair value, liabilities, to or from level 3 transfers, amount	0	0
Fair value, equity, to or from level 3 transfers, amount	$ 0	$ 0

XML

Fair Value Measurement - Summary of Financial Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Investment Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Balance, beginning of period	$ 886	$ 1,052
Acquired assets at fair value		314
Amortization	3	3
Change in unrealized gain	1	11
Balance, end of period	890	1,380
Servicing Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Balance, beginning of period	19,693	21,400
Additions, net	2,551	4,148
Change in fair value	(2,484)	(3,961)
Balance, end of period	$ 19,760	$ 21,587

XML

Fair Value Measurement - Summary of Unobservable Inputs Used in Fair Value Measurements on Recurring Basis Categorized Within Level 3 of Fair Value Hierarchy (Details) - Fair Value, Measurements, Recurring - Level 3	6 Months Ended
	Jun. 30, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impact to Valuation from an Increased or Higher Input Value	Decrease
Expected weighted average loan life	1 month 6 days
Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.064
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Expected weighted average loan life	10 years
Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.234
Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Expected weighted average loan life	4 years 8 months 12 days
Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.135
Obligations of States, Municipalities, and Political Subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impact to Valuation from an Increased or Higher Input Value	Decrease
Unobservable Inputs	0.024
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	us-gaap:MeasurementInputDefaultRateMember
Obligations of States, Municipalities, and Political Subdivisions | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.024
Single Issuer Trust Preferred
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impact to Valuation from an Increased or Higher Input Value	Decrease
Debt Instrument, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Debt Instrument, Measurement Input [Extensible List]	us-gaap:MeasurementInputDefaultRateMember
Single Issuer Trust Preferred | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.049
Single Issuer Trust Preferred | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.054
Single Issuer Trust Preferred | Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.059
Servicing Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impact to Valuation from an Increased or Higher Input Value	Decrease
Servicing Asset, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Servicing Assets | Minimum | Prepayment Speeds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.028
Servicing Assets | Maximum | Prepayment Speeds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.200
Servicing Assets | Weighted Average | Prepayment Speeds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable Inputs	0.129

XML

Fair Value Measurement - Summary of Assets Measured at Fair Value on Non-recurring Basis, Excluding Acquired Impaired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	$ 15,932	$ 9,792
Residential Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	2,877	2,076
Commercial and Industrial
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	17,789	17,397
Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	8,070	5,314
Assets Held For Sale
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	16,329	14,489
Level 3 | Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	15,932	9,792
Level 3 | Residential Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	2,877	2,076
Level 3 | Commercial and Industrial
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	17,789	17,397
Level 3 | Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	8,070	5,314
Level 3 | Assets Held For Sale
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Assets, Fair Value	$ 16,329	$ 14,489

XML

Fair Value Measurement - Summary of Estimated Fair Values of Financial Instruments and Levels Within Fair Value Hierarchy (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Apr. 30, 2019	Dec. 31, 2018
Financial assets
Cash and due from banks		$ 57,513		$ 30,190
Interest bearing deposits with other banks		31,802		91,670
Securities held-to-maturity, fair value		4,488		97,739
Restricted stock, at cost		22,937		19,202
Loans held for sale		18,473		19,827
Loans and lease receivables, net (less impaired loans at fair value)		3,832,016		3,476,425
Accrued interest receivable		12,913		10,863
Financial liabilities
Line of credit			$ 5,700
Federal Home Loan Bank advances		500,000		425,000
Securities sold under agreements to repurchase		32,885		34,166
Junior subordinated debentures issued to capital trusts, net		37,059		36,768
Level 1 | Carrying Amount
Financial assets
Cash and due from banks		57,513		30,190
Level 1 | Estimated Fair Value
Financial assets
Cash and due from banks		57,513		30,190
Level 2 | Carrying Amount
Financial assets
Interest bearing deposits with other banks		31,802		91,670
Securities held-to-maturity, fair value		4,421		99,266
Restricted stock, at cost		22,937		19,202
Financial liabilities
Non-interest-bearing deposits		1,240,375		1,192,873
Interest-bearing deposits		2,819,868		2,557,043
Accrued interest payable		4,522		3,484
Federal Home Loan Bank advances		500,000		425,000
Securities sold under agreements to repurchase		32,885		34,166
Level 2 | Estimated Fair Value
Financial assets
Interest bearing deposits with other banks		31,802		91,670
Securities held-to-maturity, fair value		4,488		97,739
Restricted stock, at cost		22,937		19,202
Financial liabilities
Non-interest-bearing deposits		1,240,375		1,192,873
Interest-bearing deposits		2,828,014		2,554,329
Accrued interest payable		4,522		3,484
Federal Home Loan Bank advances		500,000		425,000
Securities sold under agreements to repurchase		32,885		34,166
Level 3 | Carrying Amount
Financial assets
Loans held for sale		18,473		19,827
Loans and lease receivables, net (less impaired loans at fair value)	[1]	3,795,418		3,447,160
Accrued interest receivable		12,913		10,863
Financial liabilities
Junior subordinated debentures issued to capital trusts, net		37,059		36,768
Level 3 | Estimated Fair Value
Financial assets
Loans held for sale		20,625		21,654
Loans and lease receivables, net (less impaired loans at fair value)	[1]	3,702,441		3,407,652
Accrued interest receivable		12,913		10,863
Financial liabilities
Junior subordinated debentures issued to capital trusts, net		$ 42,310		$ 42,351

[1] In accordance with the prospective adoption of ASU 2016-01, the fair value of loans and lease receivables, net (less impaired loans at fair value) as of June 30, 2019 was measured using an exit price notion. The fair value as of December 31, 2018 was measured using an entry price notion.

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Derivative Instruments and Hedge Activities - Summary of Derivative Financial Instruments and Classification on Consolidated Statements of Financial Condition (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Derivatives Fair Value [Line Items]
Notional Amount	$ 541,060,000	$ 548,969,000
Other Assets	9,168,000	10,740,000
Other Liabilities	9,607,000	4,243,000
Cash Flow Hedges
Derivatives Fair Value [Line Items]
Notional Amount	250,000,000
Other Assets	1,456,000
Other Interest Rate Derivatives
Derivatives Fair Value [Line Items]
Notional Amount	286,798,000
Other Assets	7,712,000
Other Liabilities	8,280,000
Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Cash Flow Hedges
Derivatives Fair Value [Line Items]
Notional Amount	250,000,000	250,000,000
Other Assets	1,456,000	6,699,000
Other Liabilities	1,316,000
Derivatives Not Designated As Hedging Instruments | Other Credit Derivatives
Derivatives Fair Value [Line Items]
Notional Amount	4,262,000	4,424,000
Other Liabilities	11,000	6,000
Derivatives Not Designated As Hedging Instruments | Other Interest Rate Derivatives
Derivatives Fair Value [Line Items]
Notional Amount	286,798,000	294,545,000
Other Assets	7,712,000	4,041,000
Other Liabilities	$ 8,280,000	$ 4,237,000

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Derivative Instruments and Hedge Activities - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Derivative notional amount	$ 541,060,000		$ 541,060,000		$ 548,969,000
Unrealized gain (loss) to be reclassified as an decrease to interest expense during the next twelve months	767,000		767,000
Credit valuation adjustment increase (decrease) to non-interest income	(221,000)	$ (65,000)	(372,000)	$ (38,000)
Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	250,000,000		250,000,000
Interest Rate Swaps | Interest Expense
Derivative [Line Items]
Decrease in FHLB expense	(574,000)	(374,000)	(1,300,000)	(435,000)
Other Interest Rate Derivatives
Derivative [Line Items]
Derivative notional amount	286,798,000		$ 286,798,000
Derivative maturity date, start year			Apr. 30, 2020
Derivative maturity date, end year			Jan. 31, 2030
Derivative instruments transaction fees	392,000	946,000	$ 717,000	946,000
Other Credit Derivatives
Derivative [Line Items]
Derivative notional amount	4,300,000		4,300,000		4,400,000
Derivative instruments transaction fees	0	0	0	26,000
Credit valuation adjustment increase (decrease) to non-interest income	(3,000)	$ 1,000	(4,000)	$ (2,000)
Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	250,000,000		250,000,000		250,000,000
Federal Home Loan Bank Advances | Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Cash Flow Hedges
Derivative [Line Items]
Derivative notional amount	$ 250,000,000		$ 250,000,000		$ 250,000,000

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Derivative Instruments and Hedge Activities - Summary of Cash Flow Hedges (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional Amount	$ 541,060,000	$ 548,969,000
Derivative assets fair value	9,168,000	10,740,000
Derivative liabilities fair value	9,607,000	$ 4,243,000
Cash Flow Hedges
Derivative [Line Items]
Notional Amount	250,000,000
Derivative assets fair value	$ 1,456,000
Weighted average pay rates	1.67%
Weighted average receive rates	2.61%
Weighted average maturity	2 years 8 months 12 days

XML

Derivative Instruments and Hedge Activities - Summary of Net Gains (Losses) Recorded in Accumulated Other Comprehensive Income (Loss) and Consolidated Statements of Operations Relating to Cash Flow Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI	$ (3,417)	$ 1,562	$ (5,234)	$ 5,632
Interest Rate Swaps
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI			(5,234)	5,632
Amount of Gain Reclassified from OCI to Income as a Decrease to Interest Expense			$ 1,280	$ 435

XML

Derivative Instruments and Hedge Activities - Summary of Other Interest Rate Derivatives (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional Amount	$ 541,060,000	$ 548,969,000
Derivative assets fair value	9,168,000	10,740,000
Derivative liabilities fair value	9,607,000	$ 4,243,000
Other Interest Rate Derivatives
Derivative [Line Items]
Notional Amount	286,798,000
Derivative assets fair value	7,712,000
Derivative liabilities fair value	$ 8,280,000
Weighted average pay rates	4.74%
Weighted average receive rates	4.56%
Weighted average maturity	7 years

XML

Derivative Instruments and Hedge Activities - Summary of Company's Interest Rate Derivative and Offsetting Positions (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross amounts recognized	$ 9,168	$ 10,740
Net amount presented in the Consolidated Statements of Financial Condition	9,168	10,740
Gross amounts not offset in the Consolidated Statements of Financial Condition
Offsetting derivative positions	(1,478)	(2,823)
Collateral posted	(7,690)	(7,917)
Gross amounts recognized	9,607	4,243
Net amount presented in the Consolidated Statements of Financial Condition	9,607	4,243
Gross amounts not offset in the Consolidated Statements of Financial Condition
Offsetting derivative positions	(1,478)	(2,823)
Collateral posted	$ (8,129)	(1,317)
Net credit exposure		$ 103

XML

Share-Based Compensation - Additional Information (Details) - USD ($)					1 Months Ended	3 Months Ended						6 Months Ended		12 Months Ended
	May 15, 2019	Apr. 30, 2019	Oct. 03, 2017	Jul. 06, 2017	Oct. 31, 2014	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, voting par value						$ 0.01		$ 0.01				$ 0.01		$ 0.01
Proceeds from the exercise of stock options												$ 2,305,000	$ 1,135,000
Oak Park River Forest Bankshares, Inc.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Consideration paid in cash	$ 4,200,000	$ 6,163,000
Business combination conversion of outstanding options	35,870
Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Income tax benefit												$ 225,000	$ 91,000
Performance Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vested			414,894
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock in connection with restricted stock awards, shares						141,207		5,000		126,157
Number of options exercised						116,048	50,662	58,639	51,763	8,000	86,750
Omnibus Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock reserved and available for issuance																		1,550,000
Number of common shares available for future grants						1,222,576						1,222,576
Omnibus Plan | Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period															4 years
Shares of restricted voting common stock granted												141,207
Restricted shares vested												35,889		2,975
Fair value of restricted shares, vested												$ 673,000		$ 62,000
Fair value of unvested restricted stock awards						$ 4,800,000						$ 4,800,000
Omnibus Plan | Performance-based Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of restricted voting common stock granted												20,975		11,165
Period for number of shares earned under return on average assets												3 years		3 years
Minimum target percentage in assets of peer group consisting publicly-traded bank holding companies														50.00%
Maximum target percentage in assets of peer group consisting publicly-traded bank holding companies														200.00%
Omnibus Plan | Performance-based Restricted Shares | Threshold performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target number of shares to be earned														25.00%
Omnibus Plan | Performance-based Restricted Shares | 50th Percentile Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target number of shares to be earned														100.00%
Omnibus Plan | Performance-based Restricted Shares | 75th Percentile Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target number of shares to be earned														125.00%
Omnibus Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock in connection with restricted stock awards, shares				58,900											11,898
Omnibus Plan | Common Stock | Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of restricted voting common stock granted												141,207		131,157
Common stock, voting par value						$ 0.01		$ 0.01				$ 0.01		$ 0.01
Omnibus Plan | Common Stock | Restricted Shares | Each Anniversary of Grant Date Over Four Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period												4 years		4 years
Shares vest on grant date												98,574		102,559
Omnibus Plan | Common Stock | Restricted Shares | Each Anniversary of Grant Date Vest Over Three Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period												3 years		3 years
Shares vest on grant date												20,975		15,165
Omnibus Plan | Common Stock | Restricted Shares | First Anniversary of Grant Date
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vest on grant date												683		2,268
MBG Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options granted															0
Number of options exercised															0
BYB Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common shares available for future grants																		0
Number of options granted															0	212,400	1,634,568
Number of options exercised												86,000		148,748
Number of shares outstanding						1,452,072		1,598,872				1,452,072		1,598,872
Award contractual term												6 years		6 years 7 months 6 days
Options vested												0
Proceeds from the exercise of stock options												$ 1,400,000		$ 1,700,000
Income tax benefit												$ 68,000		$ 449,000
BYB Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common shares available for future grants					2,476,122
BYB Plan | Time Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award contractual term					10 years
BYB Plan | Time Options Grants | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period					5 years
BYB Plan | Time Options Grants | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period					1 year
BYB Plan | Performance Options Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award contractual term					10 years
BYB Plan | Performance Options Grants | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period					5 years
BYB Plan | Performance Options Grants | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period					1 year
FEB Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options exercised												80,710		56,404
Number of shares outstanding						543,673		624,383				543,673		624,383
Award contractual term												4 years 9 months 18 days		5 years 2 months 12 days
Proceeds from the exercise of stock options												$ 907,000		$ 601,000
Income tax benefit												$ 187,000		$ 168,000
Conversion calculation percentage						472.50%						472.50%
FEB Plan | Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares outstanding						0						0

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Share-Based Compensation - Summary of Changes in Restricted Shares (Details) - Omnibus Plan - Restricted Shares - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, beginning balance	196,480
Number of shares, granted	141,207
Number of shares, vested	(35,889)	(2,975)
Number of shares, forfeited	(13,238)
Number of shares, ending balance	288,560	196,480
Weighted average grant date fair value, beginning balance	$ 21.66
Weighted average grant date fair value, granted	19.09
Weighted average grant date fair value, vested	22.07
Weighted average grant date fair value, forfeited	20.33
Weighted average grant date fair value, ending balance	$ 20.41	$ 21.66

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Share-Based Compensation - Summary of Stock Compensation Expense (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation (benefit) - stock options	$ (133)	$ 450
Income tax benefit (expense)	(37)	125
Unrecognized compensation expense	$ 35	$ 271
Weighted-average amortization period remaining	8 months 12 days	1 year 3 months 18 days
Restricted Shares
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation - restricted stock	$ 807	$ 326
Income tax benefit	225	91
Unrecognized compensation expense	$ 4,829	$ 3,691
Weighted-average amortization period remaining	3 years	3 years 3 months 18 days

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Share-Based Compensation - Summary Activity in shares Subjected to Options and Weighted Average Exercise Prices (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
BYB Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning balance	1,598,872
Number of Shares, Exercised	(86,000)	(148,748)
Number of Shares, Forfeited	(60,800)
Number of Shares, Ending balance	1,452,072	1,598,872
Number of Shares, Exercisable	1,414,572
Weighted Average Exercise Price, Beginning balance	$ 11.84
Weighted Average Exercise Price, Exercised	16.25
Weighted Average Exercise Price, Forfeited	16.25
Weighted Average Exercise Price, Ending balance	11.39	$ 11.84
Weighted Average Exercise Price, Exercisable	$ 11.26
Intrinsic Value, Beginning balance	$ 7,713
Intrinsic Value, Exercised	245
Intrinsic Value, Ending balance	11,225	$ 7,713
Intrinsic Value, Exercisable	$ 11,118
Weighted Average Remaining Contractual Term (in Years)	6 years	6 years 7 months 6 days
Weighted Average Remaining Contractual Term (in Years), Exercisable	6 years
Number of Shares, Granted			0	212,400	1,634,568
FEB Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning balance	624,383
Number of Shares, Exercised	(80,710)	(56,404)
Number of Shares, Ending balance	543,673	624,383
Number of Shares, Exercisable	543,673
Weighted Average Exercise Price, Beginning balance	$ 11.31
Weighted Average Exercise Price, Exercised	11.24
Weighted Average Exercise Price, Ending balance	11.32	$ 11.31
Weighted Average Exercise Price, Exercisable	$ 11.32
Intrinsic Value, Beginning balance	$ 3,339
Intrinsic Value, Exercised	673
Intrinsic Value, Ending balance	4,239	$ 3,339
Intrinsic Value, Exercisable	$ 4,239
Weighted Average Remaining Contractual Term (in Years)	4 years 9 months 18 days	5 years 2 months 12 days
Weighted Average Remaining Contractual Term (in Years), Exercisable	4 years 9 months 18 days

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Earnings per Share - Additional Information (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share Basic [Line Items]
Shares outstanding	37,263,352	31,614,973	36,719,436	30,459,495
Stock Options
Earnings Per Share Basic [Line Items]
Shares outstanding			1,995,745	2,364,057
Restricted Stock Award
Earnings Per Share Basic [Line Items]
Shares outstanding			288,560	194,455

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Earnings per Share - Schedule of Calculation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 13,211	$ 12,597	$ 17,121	$ 14,536	$ 2,768	$ 6,768	$ 25,808	$ 9,536
Dividends on preferred shares	195				198		391	391
Net income available to common stockholders	$ 13,016				$ 2,570		$ 25,417	$ 9,145
Weighted-average common stock outstanding:
Weighted-average common stock outstanding (basic)	37,263,352				31,614,973		36,719,436	30,459,495
Incremental shares	684,654				953,423		725,971	988,825
Weighted-average common stock outstanding (dilutive)	37,948,006				32,568,396		37,445,407	31,448,320
Basic earnings per common share	$ 0.35				$ 0.08		$ 0.69	$ 0.30
Diluted earnings per common share	$ 0.34				$ 0.08		$ 0.68	$ 0.29

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Stockholders' Equity - Summary of Preferred and Common Stock (Details) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Common stock, voting par value	$ 0.01	$ 0.01
Common stock, voting shares authorized	150,000,000	150,000,000
Common stock, voting shares issued	38,115,219	36,343,239
Common stock, voting shares outstanding	38,115,219	36,343,239
Series B 7.5% Fixed to Floating Non-Cumulative Perpetual Preferred Stock
Class Of Stock [Line Items]
Par value	$ 0.01	$ 0.01
Shares authorized	50,000	50,000
Shares issued	10,438	10,438
Shares outstanding	10,438	10,438

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Stockholders' Equity - Summary of Preferred and Common Stock (Parenthetical) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Series B 7.5% Fixed to Floating Non-Cumulative Perpetual Preferred Stock
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage	7.50%	7.50%

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Stockholders' Equity - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2016
Class Of Stock [Line Items]
Dividends declared and paid			$ 391,000	$ 391,000
Series B Preferred Stock
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage					7.50%
Preferred stock, liquidation preference per share					$ 1,000
Preferred stock fixed dividend close date					Dec. 30, 2021
Preferred stock redemption price per share					$ 1,000
Dividends declared and paid	$ 195,000	$ 198,000	$ 391,000	$ 391,000
Series B Preferred Stock | Three-month LIBOR
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage					5.41%

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Consolidated Statements of Change in Accumulated Other Comprehensive Income (Loss) - Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 668,749	$ 650,672	$ 629,861	$ 616,406	$ 462,936	$ 458,578	$ 650,672	$ 458,578
Reclassification of certain income tax effects from accumulated other comprehensive income (loss)								(763)
Adoption of ASU 2016-01							(1,440)
Other comprehensive income (loss), net of tax	5,071	4,519	2,864	(2,027)	(921)	(3,564)	9,590	(4,485)
Ending balance	717,675	668,749	650,672	629,861	616,406	462,936	717,675	616,406
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		4,763		7,350		2,913	4,763	2,913
Reclassification of certain income tax effects from accumulated other comprehensive income (loss)								687
Other comprehensive income (loss), net of tax							(4,699)	3,750
Ending balance	64		4,763		7,350		64	7,350
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(14,261)		(17,685)		(8,000)	(14,261)	(8,000)
Reclassification of certain income tax effects from accumulated other comprehensive income (loss)								(1,450)
Adoption of ASU 2016-01							(1,440)
Other comprehensive income (loss), net of tax							14,289	(8,235)
Ending balance	(1,412)		(14,261)		(17,685)		(1,412)	(17,685)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(6,419)	(9,498)	(12,362)	(10,335)	(9,414)	(5,087)	(9,498)	(5,087)
Reclassification of certain income tax effects from accumulated other comprehensive income (loss)						(763)
Other comprehensive income (loss), net of tax	5,071	4,519	2,864	(2,027)	(921)	(3,564)
Ending balance	$ (1,348)	$ (6,419)	$ (9,498)	$ (12,362)	$ (10,335)	$ (9,414)	$ (1,348)	$ (10,335)