10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2018

Commission File No. 001-36408

PACWEST BANCORP

(Exact name of registrant as specified in its charter)

Delaware	33-0885320
(State of Incorporation)	(I.R.S. Employer Identification No.)

9701 Wilshire Blvd., Suite 700

Beverly Hills, CA 90212

(Address of Principal Executive Offices, Including Zip Code)

(310) 887-8500

(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.

YesþNoo

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files).

YesþNoo

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

þ Large accelerated filer		o Accelerated filer
o Non-accelerated filer	(Do not check if a smaller reporting company)	o Smaller reporting company
		o Emerging growth company
o 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).YesoNoþ

As of October 31, 2018, there were 121,770,415 shares of the registrant's common stock outstanding, excluding 1,487,013 shares of unvested restricted stock.

1

PACWEST BANCORP

SEPTEMBER 30, 2018 QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

		Page
PART I. FINANCIAL INFORMATION
Item 1.	Condensed Consolidated Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets (Unaudited)	4
	Condensed Consolidated Statements of Earnings (Unaudited)	5
	Condensed Consolidated Statements of Comprehensive Income (Unaudited)	6
	Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited)	7
	Condensed Consolidated Statements of Cash Flows (Unaudited)	9
	Notes to Condensed Consolidated Financial Statements (Unaudited)	11
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	47
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	82
Item 4.	Controls and Procedures	84
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	85
Item 1A.	Risk Factors	85
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	85
Item 6.	Index to Exhibits	86
Signatures		87

2

PART I

Glossary of Acronyms, Abbreviations, and Terms

The acronyms, abbreviations, and terms listed below are used in various sections of this Form 10-Q, including "Item 1. Financial Statements" and "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations."

AFX	American Financial Exchange	FRBSF	Federal Reserve Bank of San Francisco
ALM	Asset Liability Management	IPO	Initial Public Offering
ASC	Accounting Standards Codification	IRR	Interest Rate Risk
ASU	Accounting Standards Update	LIHTC	Low Income Housing Tax Credit
Basel III	A comprehensive capital framework and rules for U.S. banking organizations approved by the FRB and the FDIC in 2013.	MBS	Mortgage-Backed Securities
BHCA	Bank Holding Company Act of 1956, as amended	MVE	Market Value of Equity
BOLI	Bank Owned Life Insurance	NII	Net Interest Income
C&I	Commercial and Industrial	NIM	Net Interest Margin
CDI	Core Deposit Intangible Assets	Non-PCI	Non-Purchased Credit Impaired
CECL	Current Expected Credit Loss	NSF	Non-Sufficient Funds
CET1	Common Equity Tier 1	OREO	Other Real Estate Owned
CMOs	Collateralized Mortgage Obligations	PD/LGD	Probability of Default/Loss Given Default
CRA	Community Reinvestment Act	PCI	Purchased Credit Impaired
CRI	Customer Relationship Intangible Assets	PRSUs	Performance-Based Restricted Stock Units
CUB	CU Bancorp (a company acquired on October 20, 2017)	S1AM	Square 1 Asset Management, Inc.
CU Bank	California United Bank (a wholly-owned subsidiary of CUB)	SBA	Small Business Administration
DBO	California Department of Business Oversight	SEC	Securities and Exchange Commission
DTAs	Deferred Tax Assets	Tax Equivalent Net Interest Income	Net interest income adjusted for tax equivalent adjustments related to tax-exempt interest on certain loans and municipal securities
Dodd-Frank Act	Dodd-Frank Wall Street Reform and Consumer Protection Act	Tax Equivalent NIM	NIM adjusted for tax equivalent adjustments related to tax-exempt interest on certain loans and municipal securities
Efficiency Ratio	Noninterest expense (less intangible asset amortization, net foreclosed assets income/expense, and acquisition, integration and reorganization costs) divided by net revenues (the sum of tax equivalent net interest income plus noninterest income, less gain/loss on sale of securities and gain/loss on sales of assets other than loans and leases)	TCJA	Tax Cuts and Jobs Act
El Dorado	El Dorado Savings Bank, F.S.B.	TDRs	Troubled Debt Restructurings
FASB	Financial Accounting Standards Board	TRSAs	Time-Based Restricted Stock Awards
FDIC	Federal Deposit Insurance Corporation	U.S. GAAP	U.S. Generally Accepted Accounting Principles
FHLB	Federal Home Loan Bank of San Francisco	VIE	Variable Interest Entity
FRB	Board of Governors of the Federal Reserve System

3

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

	September 30,			December 31,
	2018			2017
	(Unaudited)
	(Dollars in thousands, except par value amounts)
ASSETS:
Cash and due from banks	$	196,502		$	233,215
Interest-earning deposits in financial institutions	185,284			165,222
Total cash, cash equivalents, and restricted cash	381,786			398,437
Securities available-for-sale, at fair value	3,820,333			3,774,431
Federal Home Loan Bank stock, at cost	31,077			20,790
Total investment securities	3,851,410			3,795,221
Loans held for sale, at lower of cost or fair value	—			481,100
Gross loans and leases held for investment	17,295,589			17,032,221
Deferred fees, net	(65,443		)	(59,478		)
Allowance for loan and lease losses	(141,920		)	(139,456		)
Total loans and leases held for investment, net	17,088,226			16,833,287
Equipment leased to others under operating leases	275,707			284,631
Premises and equipment, net	34,012			31,852
Foreclosed assets, net	4,407			1,329
Deferred tax asset, net	41,280			—
Goodwill	2,548,670			2,548,670
Core deposit and customer relationship intangibles, net	62,106			79,626
Other assets	494,522			540,723
Total assets	$	24,782,126		$	24,994,876
LIABILITIES:
Noninterest-bearing deposits	$	7,834,480		$	8,508,044
Interest-bearing deposits	10,045,063			10,357,492
Total deposits	17,879,543			18,865,536
Borrowings	1,513,166			467,342
Subordinated debentures	452,944			462,437
Accrued interest payable and other liabilities	194,788			221,963
Total liabilities	20,040,441			20,017,278
Commitments and contingencies
STOCKHOLDERS' EQUITY:
Preferred stock ($0.01 par value; 5,000,000 shares authorized; none issued and outstanding)	—			—
Common stock ($0.01 par value, 200,000,000 shares authorized at September 30, 2018 and
December 31, 2017; 125,132,237 and 130,491,108 shares issued, respectively, includes
1,529,273 and 1,436,120 shares of unvested restricted stock, respectively)	1,251			1,305
Additional paid-in capital	3,789,893			4,287,487
Retained earnings	1,067,633			723,471
Treasury stock, at cost (1,848,787 and 1,708,230 shares at September 30, 2018 and December 31, 2017)	(73,238		)	(65,836		)
Accumulated other comprehensive (loss) income, net	(43,854		)	31,171
Total stockholders' equity	4,741,685			4,977,598
Total liabilities and stockholders' equity	$	24,782,126		$	24,994,876

See Notes to Condensed Consolidated Financial Statements.

4

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Unaudited)
	(Dollars in thousands, except per share amounts)
Interest income:
Loans and leases	$	264,062		$	260,300		$	235,666		$	775,447		$	694,462
Investment securities	28,061			27,730			24,762			81,929			72,490
Deposits in financial institutions	519			484			538			1,555			967
Total interest income	292,642			288,514			260,966			858,931			767,919
Interest expense:
Deposits	21,121			16,367			13,071			51,306			31,653
Borrowings	3,814			2,649			188			7,383			2,272
Subordinated debentures	7,390			7,166			6,017			21,093			17,379
Total interest expense	32,325			26,182			19,276			79,782			51,304
Net interest income	260,317			262,332			241,690			779,149			716,615
Provision for credit losses	11,500			17,500			15,119			33,000			51,346
Net interest income after provision for credit losses	248,817			244,832			226,571			746,149			665,269
Noninterest income:
Service charges on deposit accounts	3,979			4,265			3,465			12,418			10,733
Other commissions and fees	12,397			11,767			9,944			34,429			30,917
Leased equipment income	9,120			9,790			8,332			28,497			29,442
Gain on sale of loans and leases	—			106			2,848			4,675			4,209
Gain on sale of securities	826			253			1,236			7,390			2,788
Other income	10,590			13,457			5,557			27,700			23,689
Total noninterest income	36,912			39,638			31,382			115,109			101,778
Noninterest expense:
Compensation	72,333			69,913			64,413			213,269			194,581
Occupancy	13,069			13,575			12,729			39,867			36,148
Data processing	6,740			6,896			6,459			20,295			19,811
Other professional services	6,058			5,257			4,213			15,754			11,567
Insurance and assessments	5,446			5,330			4,702			16,503			14,349
Intangible asset amortization	5,587			5,587			3,049			17,520			9,178
Leased equipment depreciation	5,001			5,237			4,862			15,613			15,719
Foreclosed assets (income) expense, net	(257		)	(61		)	2,191			(440		)	2,177
Acquisition, integration and reorganization costs	800			—			1,450			800			3,650
Loan expense	2,249			3,058			3,421			7,578			10,692
Other expense	11,127			11,657			11,053			35,238			34,921
Total noninterest expense	128,153			126,449			118,542			381,997			352,793
Earnings before income taxes	157,576			158,021			139,411			479,261			414,254
Income tax expense	(41,289		)	(42,286		)	(37,945		)	(128,963		)	(140,473		)
Net earnings	$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Earnings per share:
Basic	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26
Diluted	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26

See Notes to Condensed Consolidated Financial Statements.

5

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Unaudited)
	(In thousands)
Net earnings	$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Other comprehensive (loss) income, net of tax:
Unrealized net holding (losses) gains on securities
available-for-sale arising during the period	(29,267		)	(14,325		)	7,812			(106,261		)	49,336
Income tax benefit (expense) related to net unrealized
holding (losses) gains arising during the period	8,344			4,102			(3,198		)	30,377			(20,055		)
Unrealized net holding (losses) gains on securities
available-for-sale, net of tax	(20,923		)	(10,223		)	4,614			(75,884		)	29,281
Reclassification adjustment for net (gains) losses
included in net earnings (1)	(826		)	(253		)	(1,236		)	(7,390		)	(2,788		)
Income tax expense (benefit) related to reclassification
adjustment	235			72			506			2,113			1,138
Reclassification adjustment for net (gains) losses
included in net earnings, net of tax	(591		)	(181		)	(730		)	(5,277		)	(1,650		)
Other comprehensive (loss) income, net of tax	(21,514		)	(10,404		)	3,884			(81,161		)	27,631
Comprehensive income	$	94,773		$	105,331		$	105,350		$	269,137		$	301,412

^{___________________________________} 

(1) Entire amounts are recognized in "Gain (loss) on sale of securities" on the Condensed Consolidated Statements of Earnings.

See Notes to Condensed Consolidated Financial Statements.

6

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

	Nine Months Ended September 30, 2018
	Common Stock														Accumulated
						Additional									Other
			Par			Paid-in			Retained			Treasury			Comprehensive
	Shares		Value			Capital			Earnings			Stock			Income (Loss)			Total
	(Unaudited)
	(Dollars in thousands)
Balance, December 31, 2017	128,782,878		$	1,305		$	4,287,487		$	723,471		$	(65,836	)	$	31,171		$	4,977,598
Cumulative effects of changes in
accounting principles (1)	—		—			—			(6,136		)	—			6,136			—
Net earnings	—		—			—			118,276			—			—			118,276
Other comprehensive loss - net
unrealized loss on securities
available-for-sale, net of tax	—		—			—			—			—			(49,243		)	(49,243		)
Restricted stock awarded and
earned stock compensation,
net of shares forfeited	96,034		1			7,198			—			—			—			7,199
Restricted stock surrendered	(55,186	)	—			—			—			(2,858		)	—			(2,858		)
Common stock repurchased under
Stock Repurchase Program	(2,285,855	)	(23		)	(119,770		)	—			—			—			(119,793		)
Cash dividends paid:
Common stock, $0.50/share	—		—			(63,689		)	—			—			—			(63,689		)
Balance, March 31, 2018	126,537,871		1,283			4,111,226			835,611			(68,694		)	(11,936		)	4,867,490
Net earnings	—		—			—			115,735			—			—			115,735
Other comprehensive loss - net
unrealized loss on securities
available-for-sale, net of tax	—		—			—			—			—			(10,404		)	(10,404		)
Restricted stock awarded and
earned stock compensation,
net of shares forfeited	398,132		4			7,542			—			—			—			7,546
Restricted stock surrendered	(81,172	)	—			—			—			(4,332		)	—			(4,332		)
Common stock repurchased under
Stock Repurchase Program	(2,286,881	)	(23		)	(122,001		)	—			—			—			(122,024		)
Cash dividends paid:
Common stock, $0.60/share	—		—			(76,052		)	—			—			—			(76,052		)
Balance, June 30, 2018	124,567,950		1,264			3,920,715			951,346			(73,026		)	(22,340		)	4,777,959
Net earnings	—		—			—			116,287			—			—			116,287
Other comprehensive loss - net
unrealized loss on securities
available-for-sale, net of tax	—		—			—			—			—			(21,514		)	(21,514		)
Restricted stock awarded and
earned stock compensation,
net of shares forfeited	(3,803	)	—			8,137			—			—			—			8,137
Restricted stock surrendered	(4,199	)	—			—			—			(212		)	—			(212		)
Common stock repurchased under
Stock Repurchase Program	(1,276,498	)	(13		)	(64,564		)	—			—			—			(64,577		)
Cash dividends paid:
Common stock, $0.60/share	—		—			(74,395		)	—			—			—			(74,395		)
Balance, September 30, 2018	123,283,450		$	1,251		$	3,789,893		$	1,067,633		$	(73,238	)	$	(43,854	)	$	4,741,685

________________________

(1) Impact due to adoption on January 1, 2018 of ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income."

See Notes to Condensed Consolidated Financial Statements.

7

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

	Nine Months Ended September 30, 2017
	Common Stock													Accumulated
					Additional									Other
			Par		Paid-in			Retained			Treasury			Comprehensive
	Shares		Value		Capital			Earnings			Stock			Income		Total
	(Unaudited)
	(Dollars in thousands)
Balance, December 31, 2016	121,283,669		$	1,228	$	4,162,132		$	366,073		$	(56,360	)	$	5,982	$	4,479,055
Cumulative effect of change in
accounting principle (1)	—		—		711			(420		)	—			—		291
Net earnings	—		—		—			78,668			—			—		78,668
Other comprehensive income - net
unrealized gain on securities
available-for-sale, net of tax	—		—		—			—			—			6,736		6,736
Restricted stock awarded and
earned stock compensation,
net of shares forfeited	165,648		2		6,468			—			—			—		6,470
Restricted stock surrendered	(41,184	)	—		—			—			(2,281		)	—		(2,281		)
Cash dividends paid:
Common stock, $0.50/share	—		—		(60,833		)	—			—			—		(60,833		)
Balance, March 31, 2017	121,408,133		1,230		4,108,478			444,321			(58,641		)	12,718		4,508,106
Net earnings	—		—		—			93,647			—			—		93,647
Other comprehensive income - net
unrealized gain on securities
available-for-sale, net of tax	—		—		—			—			—			17,011		17,011
Restricted stock awarded and
earned stock compensation,
net of shares forfeited	147,850		1		7,248			—			—			—		7,249
Restricted stock surrendered	(107,662	)	—		—			—			(5,277		)	—		(5,277		)
Cash dividends paid:
Common stock, $0.50/share	—		—		(60,831		)	—			—			—		(60,831		)
Balance, June 30, 2017	121,448,321		1,231		4,054,895			537,968			(63,918		)	29,729		4,559,905
Net earnings	—		—		—			101,466			—			—		101,466
Other comprehensive income - net
unrealized gain on securities
available-for-sale, net of tax	—		—		—			—			—			3,884		3,884
Restricted stock awarded and
earned stock compensation,
net of shares forfeited	6,365		—		6,479			—			—			—		6,479
Restricted stock surrendered	(4,892	)	—		—			—			(235		)	—		(235		)
Cash dividends paid:
Common stock, $0.50/share	—		—		(60,831		)	—			—			—		(60,831		)
Balance, September 30, 2017	121,449,794		$	1,231	$	4,000,543		$	639,434		$	(64,153	)	$	33,613	$	4,610,668

________________________

(1) Impact due to adoption on January 1, 2017 of ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting."

See Notes to Condensed Consolidated Financial Statements.

8

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

	Nine Months Ended
	September 30,
	2018			2017
	(Unaudited)
	(In thousands)
Cash flows from operating activities:
Net earnings	$	350,298		$	273,781
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	25,788			23,798
Amortization of net premiums on securities available-for-sale	19,489			30,238
Amortization of intangible assets	17,520			9,178
Provision for credit losses	33,000			51,346
Loss (gain) on sale of foreclosed assets	35			(282		)
Provision for losses on foreclosed assets	65			2,138
Gain on sale of loans and leases	(4,675		)	(4,209		)
Gain on sale of premises and equipment	(13		)	(388		)
Gain on sale of securities	(7,390		)	(2,788		)
Gain on BOLI death benefit	(437		)	(1,050		)
Unrealized loss (gain) on derivatives and foreign currencies, net	76			(449		)
Earned stock compensation	22,882			20,198
(Increase) decrease in deferred income taxes, net	(8,790		)	10,164
Decrease (increase) in other assets	52,275			(32,765		)
Decrease in accrued interest payable and other liabilities	(36,303		)	(20,738		)
Net cash provided by operating activities	463,820			358,172
Cash flows from investing activities:
Net increase in loans and leases	(446,880		)	(567,291		)
Proceeds from sales of loans and leases	646,587			293,808
Proceeds from maturities and paydowns of securities available-for-sale	231,474			329,876
Proceeds from sales of securities available-for-sale	500,101			185,533
Purchases of securities available-for-sale	(910,298		)	(804,710		)
Net (purchases) redemptions of Federal Home Loan Bank stock	(10,287		)	4,620
Proceeds from sales of foreclosed assets	57			1,455
Purchases of premises and equipment, net	(9,250		)	(5,892		)
Proceeds from sales of premises and equipment	49			10,306
Proceeds from BOLI death benefit	1,901			2,478
Net decrease in equipment leased to others under operating leases	(6,000		)	(17,956		)
Net cash used in investing activities	(2,546		)	(567,773		)
Cash flows from financing activities:
Net (decrease) increase in noninterest-bearing deposits	(671,016		)	255,874
Net (decrease) increase in interest-bearing deposits	(312,429		)	649,776
Net increase (decrease) in borrowings	1,045,824			(655,413		)
Net decrease in subordinated debentures	(12,372		)	—
Common stock repurchased and restricted stock surrendered	(313,796		)	(7,793		)
Cash dividends paid	(214,136		)	(182,495		)
Net cash (used in) provided by financing activities	(477,925		)	59,949
Net decrease in cash, cash equivalents, and restricted cash	(16,651		)	(149,652		)
Cash, cash equivalents, and restricted cash, beginning of period	398,437			419,670
Cash, cash equivalents, and restricted cash, end of period	$	381,786		$	270,018

See Notes to Condensed Consolidated Financial Statements.

9

PACWEST BANCORP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

	Nine Months Ended
	September 30,
	2018		2017
	(Unaudited)
	(In thousands)
Supplemental disclosures of cash flow information:
Cash paid for interest	$	78,884	$	48,402
Cash paid for income taxes	62,525		146,321
Loans transferred to foreclosed assets	3,235		580
Transfers from loans held for investment to loans held for sale	—		175,158

See Notes to Condensed Consolidated Financial Statements.

10

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 1.  ORGANIZATION    

PacWest Bancorp, a Delaware corporation, is a bank holding company registered under the BHCA, with our corporate headquarters located in Beverly Hills, California. Our principal business is to serve as the holding company for our wholly-owned subsidiary, Pacific Western Bank. References to "Pacific Western" or the "Bank" refer to Pacific Western Bank together with its wholly-owned subsidiaries. References to "we," "us," or the "Company" refer to PacWest Bancorp together with its subsidiaries on a consolidated basis. When we refer to "PacWest" or to the "holding company," we are referring to PacWest Bancorp, the parent company, on a stand-alone basis.

We are focused on relationship-based business banking to small, middle-market and venture-backed businesses nationwide. At September 30, 2018, the Bank offers a broad range of loan and lease and deposit products and services through 74 full-service branches located throughout the State of California, one branch located in Durham, North Carolina, and numerous loan production offices located in cities across the country. Community Banking provides lending and comprehensive deposit and treasury management services to small and medium-sized businesses conducted primarily through our California-based branch offices. We offer additional products and services through our National Lending and Venture Banking groups. National Lending provides asset-based, equipment, real estate, and security cash flow loans and treasury management services to established middle-market businesses on a national basis. Venture Banking offers a comprehensive suite of financial services focused on entrepreneurial businesses and their venture capital and private equity investors, with offices located in key innovation hubs across the United States. In addition, we provide investment advisory and asset management services to select clients through Square 1 Asset Management, Inc., a wholly-owned subsidiary of the Bank and a SEC-registered investment adviser.

We generate our revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities, and fees received in connection with deposit services, extending credit and other services offered, including foreign exchange services. Our major operating expenses are compensation, occupancy, general operating expenses, and the interest paid by the Bank on deposits and borrowings.

We have completed 29 acquisitions from May 1, 2000 through September 30, 2018. Our acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates. See Note 3. Acquisitions, for more information about the CUB acquisition.

El Dorado Savings Bank Merger Announcement

On September 11, 2018, PacWest entered into a definitive agreement and plan of merger (the “Agreement”) whereby PacWest will acquire El Dorado Savings Bank, F.S.B. (“El Dorado”) in a transaction valued at approximately $466.7 million.

El Dorado, headquartered in Placerville, California, is a federally chartered savings bank founded in 1958, with approximately $2.2 billion in assets and 35 branches located primarily in eight Northern California counties and two Northern Nevada counties. In connection with the transaction, El Dorado will be merged into the Bank.

The transaction, which was approved by the PacWest and El Dorado boards of directors, is expected to close in the first quarter of 2019 and is subject to customary closing conditions, including obtaining approval by bank regulatory authorities and El Dorado’s shareholders.

11

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Significant Accounting Policies

Our accounting policies are described in Note 1. Nature of Operations and Summary of Significant Accounting Policies, of our audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission ("Form 10-K"). Updates to our significant accounting policies described below reflect the impact of the adoption of ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.”

Investment Securities

Our significant accounting policy for investment securities applied to both debt and equity securities in prior periods. Effective January 1, 2018, upon the adoption of ASUs 2016-01 and 2018-03, our significant accounting policy for investment securities applies only to debt securities.

Equity Investments

Investments in common or preferred stock that are not publicly traded and certain investments in limited partnerships are considered equity investments that do not have a readily determinable fair value. If we have the ability to significantly influence the operating and financial policies of the investee, the investment is accounted for pursuant to the equity method of accounting. This is generally presumed to exist when we own between 20% and 50% of a corporation, or when we own greater than 5% of a limited partnership or similarly structured entity. Our equity investment carrying values are included in other assets and our share of earnings and losses in equity method investees is included in "Noninterest income - other" on the condensed consolidated statements of earnings. Prior to January 1, 2018, if we did not have significant influence over the investee, the cost method was used to accountfor the equity interest.

Effective January 1, 2018 with the adoption of ASU 2016-01, our accounting treatment for equity investments differs for those with and without readily determinable fair values. Equity investments with readily determinable fair values are recorded at fair value with changes in fair value recorded in “Noninterest income - other.” For equity investments without readily determinable fair values we have elected the “measurement alternative,” and therefore carry these investments at cost, less impairment (if any), plus or minus changes in observable prices. On a quarterly basis, we review our equity investments without readily determinable fair values for impairment. We consider a number of qualitative factors such as whether there is a significant deterioration in earnings performance, credit rating, asset quality, or business prospects of the investee in determining if impairment exists. If the investment is considered impaired, an impairment loss equal to the amount by which the carrying value exceeds its fair value is recorded through a charge to earnings. The impairment loss may be reversed in a subsequent period if there are observable transactions for the identical or similar investment of the same issuer at a higher amount than the carrying amount that was established when the impairment was recognized. Impairment as well as upward or downward adjustments resulting from observable price changes in orderly transactions for identical or similar investments are included in “Noninterest income - other.”

Realized gains or losses resulting from the sale of equity investments are calculated using the specific identification method and are included in "Noninterest income - other."

Comprehensive Income

Comprehensive income consists of net earnings and net unrealized gains (losses) on debt securities available‑for‑sale, net, and is presented in the consolidated statements of comprehensive income.

12

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Accounting Standards Adopted in 2018

Effective January 1, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 contained a number of changes which are applicable to the Company including the following: (1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; (2) allows equity investments without readily determinable fair values to be measured at cost less impairment, if any, plus or minus changes in observable prices (referred to as the "measurement alternative"); and (3) changes certain presentation and disclosure requirements for financial instruments, including using the exit price notion when measuring the fair value of financial instruments (see Note 11. Fair Value Measurements). ASU 2018-03 also clarified certain aspects of the guidance issued in ASU 2016-01, including requiring a prospective transition approach for equity investments without readily determinable fair value in which the measurement alternative is applied.

ASU 2016-01 does not apply to investments accounted for using the equity method, investments in consolidated subsidiaries, FHLB stock, and investments in low income housing tax credit projects. Upon adoption of ASU 2016-01, the Company recorded a transition adjustment to reclassify $529,000 in net unrealized gains from accumulated other comprehensive income ("AOCI") to retained earnings. The ASU also eliminated the requirement to classify equity investments into different categories such as “Available-for-sale.” The adoption of this ASU may result in more earnings volatility as changes in fair value of certain equity investments will now be recorded in the statement of earnings as opposed to AOCI.

Effective January 1, 2018, the Company early-adopted ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The TCJA required deferred tax assets and liabilities to be re-measured at its enactment date for the effect of the change in the federal corporate tax rate. This process resulted in "stranded tax effects" in AOCI for deferred tax asset or liabilities which were established with an offsetting amount in AOCI. ASU 2018-02 allows for a reclassification of the stranded tax effects resulting from the enactment of the TCJA from AOCI to retained earnings. The Company elected to reclassify its stranded tax effects of $6.665 million from AOCI to retained earnings effective January 1, 2018, while no other income tax effects related to the application of the TCJA were reclassified.

Effective January 1, 2018, the Company adopted ASU 2014-09, "Revenue Recognition (Topic 606): Revenue from Contracts with Customers." ASU 2014-09 supersedes Topic 605, "Revenue Recognition" and requires an entity to recognize revenue at an amount that reflects the consideration to which it expects to be entitled to in exchange for the transfer of promised goods or services to customers.

Substantially all of the Company's revenue is interest income on loans, investment securities, and deposits at other financial institutions which are specifically outside the scope of ASU 2014-09. ASU 2014-09 applies primarily to certain noninterest income items in the Company's condensed consolidated statement of earnings. The Company adopted ASU 2014-09 as of January 1, 2018 using the cumulative effect transition method, which resulted in no adjustment to retained earnings and no material impact on the Company's consolidated financial position, results of operations, or cash flows. The Company did make minor changes to accounting operations and internal controls as part of adopting this new standard. See Note 13. Revenue From Contracts With Customers for further details.

Effective January 1, 2018, the Company adopted ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments." Upon adoption, the Company applied the retrospective transition method to each period presented. ASU 2016-15 addressed eight issues related to the statement of cash flows, the most relevant to the Company being the classification of proceeds from the settlement of BOLI policies. As the Company classified proceeds from the settlement of BOLI policies in the manner required by ASU 2016-15 in the prior periods presented, there was no change to the Company's consolidated financial position, results of operations, or cash flows for both current and prior periods upon adoption.

Effective January 1, 2018, the Company adopted ASU 2016-18, "Statement of Cash Flows (Topic 230): Restricted Cash." Upon adoption, the Company applied the retrospective transition method to each period presented. As the Company does not present restricted cash as a separate line in the statement of financial position, there is no change to the presentation of cash on the statement of cash flows. The nature and amount of our restricted cash is shown in Note 2. Restricted Cash Balances.

13

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Effective January 1, 2018, the Company adopted ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business." ASU 2017-01 provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses.The Company had no acquisitions or purchases of components of a business in the first three quarters of 2018, thus, the impact of adopting the new standard had no impact on the Company's consolidated financial position, results of operations, or cash flows.

Effective January 1, 2018, the Company adopted ASU 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting." ASU 2017-09 provided clarification of what constitutes a modification of a share-based payment award. The Company did not modify any share-based payment awards in the first three quarters of 2018, thus, the impact of adopting the new standard had no impact on the Company's consolidated financial position, results of operations, or cash flows.

Basis of Presentation

Our interim condensed consolidated financial statements are prepared in accordance with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, certain disclosures accompanying annual consolidated financial statements are omitted. In the opinion of management, all significant intercompany accounts and transactions have been eliminated and adjustments, consisting solely of normal recurring accruals and considered necessary for the fair presentation of financial statements for the interim periods, have been included. The current period's results of operations are not necessarily indicative of the results that ultimately may be achieved for the year. The interim condensed consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Form 10-K.

Use of Estimates

We have made a number of estimates and assumptions related to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period to prepare these condensed consolidated financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates. Material estimates subject to change in the near term include, among other items, the allowance for credit losses (the combination of the allowance for loan and lease losses and the reserve for unfunded loan commitments), the carrying value of intangible assets, the realization of deferred tax assets, and the fair value estimates of assets acquired and liabilities assumed in acquisitions. These estimates may be adjusted as more current information becomes available, and any adjustment may be significant.

The allowance for loan and lease losses (“ALLL”) represents management’s estimate of probable credit losses inherent in the loan portfolio as of the balance sheet date. During the second quarter of 2018, the Company changed its ALLL methodology due to the growth and increased complexity of the loan portfolio. The new ALLL methodology included three primary changes: the quantitative component now employs a probability of default/loss given default ("PD/LGD") methodology; the loan segmentation groups our loan portfolio into 21 loan segments with similar risk characteristics (as opposed to 34 loan segments used under the previous methodology); and the historical range of loan performance history (often referred to as the look-back period) was lengthened by one year. The methodology for assessing individually impaired loans did not change under the new ALLL methodology. The ALLL methodology used to derive qualitative adjustments based on other internal or external factors was updated to align with the new PD/LGD methodology being applied to estimate the quantitative general allowance for unimpaired loans. As a result, the composition of the ALLL changed as the quantitative component increased and the qualitative component decreased as the new quantitative methodology now encompasses more information, such as the longer look-back period, that previously required a qualitative adjustment as part of determining the total ALLL estimate. These changes in the ALLL methodology did not result in material changes to management's overall estimate of the ALLL.

14

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period’s presentation format. In our loan and allowance tables, we realigned our commercial loan portfolio classes and subclasses to better reflect and report our lending, especially in light of the fourth quarter of 2017 cash flow loan sale and the exiting of the origination operations related to general, technology, and healthcare cash flow loans. Prior to the realignment, our commercial portfolio classes were: (1) asset-based, (2) venture capital, (3) cash flow, and (4) equipment finance. After the realignment, our commercial portfolio classes are (1) asset-based (which includes equipment finance), (2) venture capital, and (3) other commercial (which includes retained cash flow). All of the loan and allowance tables, both current period and prior periods, reflect this realignment.

Prior to January 1, 2018, our credit quality disclosures were only for Non-PCI loans and leases. As our gross PCI loan portfolio reduced to less than 0.4% of total loans as of the end of 2017, beginning in 2018 the credit quality disclosures reflect our entire loan and lease portfolio. Accordingly, for the credit quality tables in Note 6. Loans and Leases, amounts related to the 2018 periods are for total loans and leases, while amounts related to the 2017 periods are for Non-PCI loans and leases only.

NOTE 2. RESTRICTED CASH BALANCES

The Company is required to maintain reserve balances with the FRBSF. Such reserve requirements are based on a percentage of deposit liabilities and may be satisfied by cash on hand. The average reserves required to be held at the FRBSF for the nine months endedSeptember 30, 2018 and year ended December 31, 2017 were $76.9 million and $77.6 million. As of September 30, 2018 and December 31, 2017, we pledged cash collateral for our derivative contracts of $2.3 million and $2.7 million.

NOTE 3.  ACQUISITIONS    

CUB Acquisition

On October 20, 2017, we completed the acquisition of CUB. As part of the acquisition, CU Bank, a wholly-owned subsidiary of CUB, was merged with and into the Bank.

We completed the acquisition to, among other things, enhance our Southern California community bank franchise by adding a $2.1 billion loan portfolio and $2.7 billion of core deposits. The CUB acquisition has been accounted for under the acquisition method of accounting. We acquired$3.5 billionof assets and assumed$2.8 billionof liabilities upon closing of the acquisition. The assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of the acquisition date.

We made significant estimates and exercised significant judgment in estimating fair values and accounting for such acquired assets and liabilities. Such fair values are provisional for up to one year after the acquisition date or when additional information relative to the closing date fair values becomes available and such information is considered final, whichever is earlier. The application of the acquisition method of accounting resulted in goodwill of$374.7 million. All of the recognized goodwill is non-deductible for tax purposes.

NOTE 4.  GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill and other intangible assets arise from the acquisition method of accounting for business combinations. Goodwill and other intangible assets generated from business combinations and deemed to have indefinite lives are not subject to amortization and instead are tested for impairment at least annually. Goodwill represents the excess of the purchase price over the fair value of the net assets and other identifiable intangible assets acquired. Impairment exists when the carrying value of the goodwill exceeds its implied fair value. An impairment loss would be recognized in an amount equal to that excess as a charge to "Noninterest expense" in the condensed consolidated statements of earnings.

Our other intangible assets with definite lives include CDI and CRI. CDI and CRI are amortized over their respective estimated useful lives and reviewed for impairment at least quarterly. The amortization expense represents the estimated decline in the value of the underlying deposits or loan and lease customers acquired. The aggregate amortization expense is expected to be $22.5 million for 2018. The estimated aggregate amortization expense related to our current intangible assets for each of the next five years is $18.7 million for 2019, $14.6 million for 2020, $10.8 million for 2021, $7.5 million for 2022, and $1.4 million for 2023.

15

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table presents the changes in CDI and CRI and the related accumulated amortization for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(In thousands)
Gross Amount of CDI and CRI:
Balance, beginning of period	$	119,497		$	119,497		$	64,187		$	119,497		$	64,187
Fully amortized portion	—			—			(2,190		)	—			(2,190		)
Balance, end of period	119,497			119,497			61,997			119,497			61,997
Accumulated Amortization:
Balance, beginning of period	(51,804		)	(46,217		)	(33,950		)	(39,871		)	(27,821		)
Amortization	(5,587		)	(5,587		)	(3,049		)	(17,520		)	(9,178		)
Fully amortized portion	—			—			2,190			—			2,190
Balance, end of period	(57,391		)	(51,804		)	(34,809		)	(57,391		)	(34,809		)
Net CDI and CRI, end of period	$	62,106		$	67,693		$	27,188		$	62,106		$	27,188

NOTE 5. INVESTMENT SECURITIES     

Securities Available-for-Sale

The following table presents amortized cost, gross unrealized gains and losses, and fair values of securities available-for-sale as of the dates indicated:

	September 30, 2018									December 31, 2017
			Gross		Gross							Gross		Gross
	Amortized		Unrealized		Unrealized			Fair		Amortized		Unrealized		Unrealized			Fair
Security Type	Cost		Gains		Losses			Value		Cost		Gains		Losses			Value
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	251,150	$	1,971	$	(3,290	)	$	249,831	$	243,375	$	3,743	$	(844	)	$	246,274
Agency CMOs	583,062		220		(13,677		)	569,605		277,638		968		(2,897		)	275,709
Private label CMOs	110,353		2,699		(2,602		)	110,450		122,816		3,813		(642		)	125,987
Municipal securities	1,272,501		10,974		(11,892		)	1,271,583		1,627,707		53,700		(1,339		)	1,680,068
Agency commercial MBS	1,117,749		—		(40,744		)	1,077,005		1,169,969		2,758		(8,758		)	1,163,969
U.S. Treasury securities	400,591		—		(2,960		)	397,631		—		—		—			—
SBA securities	69,999		—		(2,413		)	67,586		160,214		695		(575		)	160,334
Asset-backed securities	59,322		18		(888		)	58,452		89,425		159		(874		)	88,710
Corporate debt securities	17,000		1,190		—			18,190		17,000		2,295		—			19,295
Collateralized loan obligations	—		—		—			—		6,960		55		—			7,015
Equity investments (1)	—		—		—			—		6,421		779		(130		)	7,070
Total	$	3,881,727	$	17,072	$	(78,466	)	$	3,820,333	$	3,721,525	$	68,965	$	(16,059	)	$	3,774,431

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

As of September 30, 2018, securities available-for-sale with a fair value of $427.8 million were pledged as collateral for borrowings, public deposits, and other purposes as required by various statutes and agreements.

16

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Realized Gains and Losses on Securities Available-for-Sale

During the three months ended September 30, 2018, we sold $130.5 million of securities available-for-sale for a gross realized gain of $958,000 and a gross realized loss of $132,000. During the three months ended September 30, 2017, we sold $98.3 million of securities available-for-sale for a gross realized gain of $1.3 million and a gross realized loss of $119,000.

During the nine months endedSeptember 30, 2018, we sold $492.7 million of securities available-for-sale for a gross realized gain of $8.1 million and a gross realized loss of $707,000. During the nine months endedSeptember 30, 2017, we sold $182.7 million of securities available-for-sale for a gross realized gain of $3.3 million and a gross realized loss of $498,000.

Unrealized Losses on Securities Available-for-Sale

The following tables present the gross unrealized losses and fair values of securities available-for-sale that were in unrealized loss positions, for which other-than-temporary impairments have not been recognized in earnings, as of the dates indicated:

	September 30, 2018
	Less Than 12 Months					12 Months or More					Total
			Gross					Gross					Gross
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Security Type	Value		Losses			Value		Losses			Value		Losses
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	76,238	$	(1,332	)	$	51,861	$	(1,958	)	$	128,099	$	(3,290	)
Agency CMOs	401,795		(6,418		)	140,997		(7,259		)	542,792		(13,677		)
Private label CMOs	46,713		(1,101		)	34,654		(1,501		)	81,367		(2,602		)
Municipal securities	436,012		(8,743		)	55,402		(3,149		)	491,414		(11,892		)
Agency commercial MBS	784,452		(26,454		)	292,553		(14,290		)	1,077,005		(40,744		)
U.S. Treasury securities	397,631		(2,960		)	—		—			397,631		(2,960		)
SBA securities	32,867		(1,143		)	34,719		(1,270		)	67,586		(2,413		)
Asset-backed securities	20,815		(147		)	35,278		(741		)	56,093		(888		)
Total	$	2,196,523	$	(48,298	)	$	645,464	$	(30,168	)	$	2,841,987	$	(78,466	)

	December 31, 2017
	Less Than 12 Months					12 Months or More					Total
			Gross					Gross					Gross
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Security Type	Value		Losses			Value		Losses			Value		Losses
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	44,795	$	(311	)	$	26,010	$	(533	)	$	70,805	$	(844	)
Agency CMOs	163,014		(2,452		)	20,928		(445		)	183,942		(2,897		)
Private label CMOs	50,521		(500		)	5,035		(142		)	55,556		(642		)
Municipal securities	67,936		(365		)	32,326		(974		)	100,262		(1,339		)
Agency commercial MBS	579,373		(3,777		)	129,060		(4,981		)	708,433		(8,758		)
SBA securities	74,904		(575		)	—		—			74,904		(575		)
Asset-backed securities	45,198		(818		)	10,473		(56		)	55,671		(874		)
Equity investments (1)	1,039		(130		)	—		—			1,039		(130		)
Total	$	1,026,780	$	(8,928	)	$	223,832	$	(7,131	)	$	1,250,612	$	(16,059	)

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

We reviewed the securities that were in an unrealized loss position at September 30, 2018, and concluded their unrealized losses were a result of the level of market interest rates relative to the types of securities and pricing changes caused by shifting supply and demand dynamics and not a result of downgraded credit ratings or other indicators of deterioration of the underlying issuers' ability to repay. Accordingly, we determined the securities were temporarily impaired and we did not recognize such impairment in the condensed consolidated statements of earnings. Although we periodically sell securities for portfolio management purposes, we do not foresee having to sell any temporarily impaired securities strictly for liquidity needs and believe that it is more likely than not we would not be required to sell any temporarily impaired securities before recovery of their amortized cost.

Contractual Maturities of Securities Available-for-Sale

The following table presents the contractual maturities of our securities available-for-sale portfolio based on amortized cost and carrying value as of the date indicated:

	September 30, 2018
	Amortized		Fair
Maturities	Cost		Value
	(In thousands)
Due in one year or less	$	39,300	$	39,272
Due after one year through five years	716,172		707,368
Due after five years through ten years	970,758		937,317
Due after ten years	2,155,497		2,136,376
Total securities available-for-sale	$	3,881,727	$	3,820,333

Mortgage-backed securities have contractual terms to maturity, but require periodic payments to reduce principal. In addition, expected maturities may differ from contractual maturities because obligors and/or issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

Interest Income on Investment Securities

The following table presents the composition of our interest income on investment securities for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,		June 30,		September 30,		September 30,
	2018		2018		2017		2018		2017
	(In thousands)
Taxable interest	$	17,618	$	17,106	$	13,576	$	49,323	$	39,257
Non-taxable interest	10,127		10,276		10,795		31,510		31,926
Dividend income	316		348		391		1,096		1,307
Total interest income on investment securities	$	28,061	$	27,730	$	24,762	$	81,929	$	72,490

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 6.  LOANS AND LEASES

Our loans are carried at the principal amount outstanding, net of deferred fees and costs, and in the case of acquired loans, net of purchase discounts and premiums. Deferred fees and costs and purchase discounts and premiums on acquired non-impaired loans are recognized as an adjustment to interest income over the contractual life of the loans primarily using the effective interest method or taken into income when the related loans are paid off or included in the carrying amount of loans that are sold.

Prior to January 1, 2018, our loan and lease portfolio consisted of Non-PCI loans and leases and PCI loans. Non-PCI loans and leases were those we originated or those we acquired that were not credit impaired at the dates of acquisition. PCI loans were purchased loans for which there was, at the acquisition date, evidence of credit deterioration since their origination and for which it was probable that collection of all contractually required payments was unlikely. As our gross PCI loan portfolio represented less than 0.4% of total loans as of the end of 2017, beginning in 2018 the PCI loans were accounted for as Non-PCI loans. Accordingly, in the credit quality tables below under "Loans and leases held for investment," amounts related to the 2018 period are for total loans and leases, and amounts related to the 2017 period are for Non-PCI loans and leases.

Loans and Leases Held for Investment

The following table summarizes the composition of our loans and leases held for investment as of the dates indicated:

	September 30, 2018			December 31, 2017
	Total			Non-PCI						Total
	Loans			Loans			PCI			Loans
	and Leases			and Leases			Loans			and Leases
	(In thousands)
Real estate mortgage	$	7,695,182		$	7,815,355		$	53,658		$	7,869,013
Real estate construction and land	2,026,645			1,611,287			—			1,611,287
Commercial	7,175,310			7,137,978			4,158			7,142,136
Consumer	398,452			409,551			234			409,785
Total gross loans and leases held for investment	17,295,589			16,974,171			58,050			17,032,221
Deferred fees, net	(65,443		)	(59,464		)	(14		)	(59,478		)
Total loans and leases held for investment,
net of deferred fees	17,230,146			16,914,707			58,036			16,972,743
Allowance for loan and lease losses	(141,920		)	(133,012		)	(6,444		)	(139,456		)
Total loans and leases held for investment, net	$	17,088,226		$	16,781,695		$	51,592		$	16,833,287

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Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables present an aging analysis of our loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated:

	September 30, 2018
	30 - 89		90 or More
	Days		Days		Total
	Past Due		Past Due		Past Due		Current		Total
	(In thousands)
Real estate mortgage:
Commercial	$	2,221	$	8,949	$	11,170	$	4,921,653	$	4,932,823
Residential	5,647		445		6,092		2,739,745		2,745,837
Total real estate mortgage	7,868		9,394		17,262		7,661,398		7,678,660
Real estate construction and land:
Commercial	—		—		—		854,346		854,346
Residential	8,498		—		8,498		1,138,113		1,146,611
Total real estate construction and land	8,498		—		8,498		1,992,459		2,000,957
Commercial:
Asset-based	—		655		655		3,221,656		3,222,311
Venture capital	1,028		497		1,525		2,030,370		2,031,895
Other commercial	222		3,724		3,946		1,893,906		1,897,852
Total commercial	1,250		4,876		6,126		7,145,932		7,152,058
Consumer	605		45		650		397,821		398,471
Total	$	18,221	$	14,315	$	32,536	$	17,197,610	$	17,230,146

	December 31, 2017 (1)
	30 - 89		90 or More
	Days		Days		Total
	Past Due		Past Due		Past Due		Current		Total
	(In thousands)
Real estate mortgage:
Commercial	$	29,070	$	9,107	$	38,177	$	5,323,310	$	5,361,487
Residential	6,999		2,022		9,021		2,428,483		2,437,504
Total real estate mortgage	36,069		11,129		47,198		7,751,793		7,798,991
Real estate construction and land:
Commercial	—		—		—		769,075		769,075
Residential	2,081		—		2,081		820,073		822,154
Total real estate construction and land	2,081		—		2,081		1,589,148		1,591,229
Commercial:
Asset-based	344		690		1,034		2,923,837		2,924,871
Venture capital	6,533		760		7,293		2,115,418		2,122,711
Other commercial	2,846		1,586		4,432		2,062,906		2,067,338
Total commercial	9,723		3,036		12,759		7,102,161		7,114,920
Consumer	562		—		562		409,005		409,567
Total (1)	$	48,435	$	14,165	$	62,600	$	16,852,107	$	16,914,707

________________________

(1) Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

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Notes to Condensed Consolidated Financial Statements (Unaudited)

It is our policy to discontinue accruing interest when principal or interest payments are past due 90 days or more (unless the loan is both well secured and in the process of collection) or when, in the opinion of management, there is a reasonable doubt as to the collectability of a loan or lease in the normal course of business. Interest income on nonaccrual loans is recognized only to the extent cash is received and the principal balance of the loan is deemed collectable.

The following table presents our nonaccrual and performing loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated:

	September 30, 2018						December 31, 2017 (1)
	Nonaccrual		Performing		Total		Nonaccrual		Performing		Total
	(In thousands)
Real estate mortgage:
Commercial	$	29,723	$	4,903,100	$	4,932,823	$	65,563	$	5,295,924	$	5,361,487
Residential	3,259		2,742,578		2,745,837		3,350		2,434,154		2,437,504
Total real estate mortgage	32,982		7,645,678		7,678,660		68,913		7,730,078		7,798,991
Real estate construction and land:
Commercial	—		854,346		854,346		—		769,075		769,075
Residential	—		1,146,611		1,146,611		—		822,154		822,154
Total real estate construction and land	—		2,000,957		2,000,957		—		1,591,229		1,591,229
Commercial:
Asset-based	34,619		3,187,692		3,222,311		33,553		2,891,318		2,924,871
Venture capital	35,520		1,996,375		2,031,895		29,424		2,093,287		2,122,711
Other commercial	9,579		1,888,273		1,897,852		23,874		2,043,464		2,067,338
Total commercial	79,718		7,072,340		7,152,058		86,851		7,028,069		7,114,920
Consumer	272		398,199		398,471		20		409,547		409,567
Total	$	112,972	$	17,117,174	$	17,230,146	$	155,784	$	16,758,923	$	16,914,707

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

At September 30, 2018, nonaccrual loans and leases totaled $113.0 million and included $14.3 million of loans and leases 90 or more days past due, $1.6 million of loans and leases 30 to 89 days past due, and $97.0 million of loans and leases current with respect to contractual payments that were placed on nonaccrual status based on management’s judgment regarding their collectability. Nonaccrual loans and leases totaled $155.8 million at December 31, 2017, including $14.2 million of loans and leases 90 or more days past due, $3.2 million of loans and leases 30 to 89 days past due, and $138.4 million of current loans and leases that were placed on nonaccrual status based on management’s judgment regarding their collectability.

As of September 30, 2018, our ten largest loan relationships on nonaccrual status had an aggregate carrying value of $83.2 million and represented 73.7% of total nonaccrual loans and leases.

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Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table presents the credit risk rating categories for loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated. Classified loans and leases are those with a credit risk rating of either substandard or doubtful.

	September 30, 2018
	Classified		Special Mention		Pass		Total
	(In thousands)
Real estate mortgage:
Commercial	$	64,574	$	140,611	$	4,727,638	$	4,932,823
Residential	11,254		12,036		2,722,547		2,745,837
Total real estate mortgage	75,828		152,647		7,450,185		7,678,660
Real estate construction and land:
Commercial	442		3,833		850,071		854,346
Residential	—		24,645		1,121,966		1,146,611
Total real estate construction and land	442		28,478		1,972,037		2,000,957
Commercial:
Asset-based	42,960		64,778		3,114,573		3,222,311
Venture capital	47,230		65,295		1,919,370		2,031,895
Other commercial	93,564		47,164		1,757,124		1,897,852
Total commercial	183,754		177,237		6,791,067		7,152,058
Consumer	435		1,696		396,340		398,471
Total	$	260,459	$	360,058	$	16,609,629	$	17,230,146

	December 31, 2017 (1)
	Classified		Special Mention		Pass		Total
	(In thousands)
Real estate mortgage:
Commercial	$	93,795	$	122,488	$	5,145,204	$	5,361,487
Residential	8,425		4,582		2,424,497		2,437,504
Total real estate mortgage	102,220		127,070		7,569,701		7,798,991
Real estate construction and land:
Commercial	—		—		769,075		769,075
Residential	—		619		821,535		822,154
Total real estate construction and land	—		619		1,590,610		1,591,229
Commercial:
Asset-based	51,000		37,256		2,836,615		2,924,871
Venture capital	49,671		114,210		1,958,830		2,122,711
Other commercial	75,251		21,883		1,970,204		2,067,338
Total commercial	175,922		173,349		6,765,649		7,114,920
Consumer	263		1,130		408,174		409,567
Total	$	278,405	$	302,168	$	16,334,134	$	16,914,707

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

In addition to our internal risk rating process, our federal and state banking regulators, as an integral part of their examination process, periodically review the Company’s loan and lease risk rating classifications. Our regulators may require the Company to recognize rating downgrades based on their judgments related to information available to them at the time of their examinations. Risk rating downgrades generally result in increases in the provisions for credit losses and the allowance for credit losses.

Nonaccrual loans and leases and performing TDRs are considered impaired for reporting purposes. TDRs are a result of rate reductions, term extensions, fee concessions, and debt forgiveness, or a combination thereof.

The following table presents the composition of our impaired loans and leases held for investment, net of deferred fees, by portfolio segment as of the dates indicated:

	September 30, 2018						December 31, 2017 (1)
					Total						Total
	Nonaccrual				Impaired		Nonaccrual				Impaired
	Loans				Loans		Loans				Loans
	and		Performing		and		and		Performing		and
	Leases		TDRs		Leases		Leases		TDRs		Leases
	(In thousands)
Real estate mortgage	$	32,982	$	15,296	$	48,278	$	68,913	$	47,560	$	116,473
Real estate construction and land	—		5,533		5,533		—		5,690		5,690
Commercial	79,718		1,166		80,884		86,851		3,488		90,339
Consumer	272		111		383		20		100		120
Total	$	112,972	$	22,106	$	135,078	$	155,784	$	56,838	$	212,622

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables present information regarding our impaired loans and leases held for investment, net of deferred fees, by portfolio segment and class as of and for the dates indicated:

	September 30, 2018						December 31, 2017 (1)
			Unpaid						Unpaid
	Recorded		Principal		Related		Recorded		Principal		Related
Impaired Loans and Leases	Investment		Balance		Allowance		Investment		Balance		Allowance
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	1,682	$	225	$	15,750	$	16,548	$	628
Residential	2,495		2,536		271		2,787		2,957		342
Commercial:
Venture capital	34,515		36,149		19,003		16,565		17,203		4,267
Other commercial	1,360		1,361		1,360		20,404		29,951		8,368
Consumer	—		—		—		100		100		16
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	36,087	$	54,497			$	93,827	$	105,923
Residential	7,915		10,172				4,109		4,481
Real estate construction and land:
Commercial	5,533		5,537				5,690		5,689
Commercial:
Asset-based	34,618		40,085				33,553		54,911
Venture capital	1,421		26,853				14,534		40,029
Other commercial	8,970		28,343				5,283		9,351
Consumer	383		547				20		93
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	48,278	$	68,887	$	496	$	116,473	$	129,909	$	970
Real estate construction and land	5,533		5,537		—		5,690		5,689		—
Commercial	80,884		132,791		20,363		90,339		151,445		12,635
Consumer	383		547		—		120		193		16
Total	$	135,078	$	207,762	$	20,859	$	212,622	$	287,236	$	13,621

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

	Three Months Ended September 30,
	2018				2017
	Weighted		Interest		Weighted		Interest
	Average		Income		Average		Income
Impaired Loans and Leases	Balance(1)		Recognized		Balance(1)		Recognized
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	18	$	14,716	$	214
Residential	2,494		21		3,074		14
Commercial:
Venture capital	28,322		—		18,298		—
Other commercial	1,360		—		33,486		31
Consumer	—		—		106		2
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	34,155	$	129	$	92,183	$	635
Residential	7,906		45		3,670		15
Real estate construction and land:
Commercial	5,533		95		5,764		74
Commercial:
Asset-based	34,618		—		31,086		—
Venture capital	1,421		—		2,647		—
Other commercial	8,108		25		3,695		40
Consumer	383		2		296		—
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	46,336	$	213	$	113,643	$	878
Real estate construction and land	5,533		95		5,764		74
Commercial	73,829		25		89,212		71
Consumer	383		2		402		2
Total	$	126,081	$	335	$	209,021	$	1,025

_________________________

(1) For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

	Nine Months Ended September 30,
	2018				2017
	Weighted		Interest		Weighted		Interest
	Average		Income		Average		Income
Impaired Loans and Leases	Balance(1)		Recognized		Balance(1)		Recognized
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	55	$	14,716	$	634
Residential	2,494		62		3,074		41
Commercial:
Venture capital	17,459		—		9,621		—
Other commercial	688		—		33,193		88
Consumer	—		—		106		6
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	32,098	$	376	$	90,631	$	1,924
Residential	7,845		132		3,650		44
Real estate construction and land:
Commercial	5,533		283		5,764		220
Commercial:
Asset-based	34,618		—		30,682		—
Venture capital	1,330		—		1,922		—
Other commercial	7,417		70		3,044		68
Consumer	373		6		296		—
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	44,218	$	625	$	112,071	$	2,643
Real estate construction and land	5,533		283		5,764		220
Commercial	61,512		70		78,462		156
Consumer	373		6		402		6
Total	$	111,636	$	984	$	196,699	$	3,025

_________________________

(1) For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table presents our troubled debt restructurings of loans held for investment by portfolio segment and class for the periods indicated:

	Three Months Ended September 30,
	2018					2017
		Pre-		Post-			Pre-		Post-
		Modification		Modification			Modification		Modification
	Number	Outstanding		Outstanding		Number	Outstanding		Outstanding
	of	Recorded		Recorded		of	Recorded		Recorded
Troubled Debt Restructurings	Loans	Investment		Investment		Loans	Investment		Investment
	(Dollars in thousands)
Real estate mortgage:
Commercial	4	$	2,889	$	712	1	$	998	$	998
Residential	5	912		912		3	566		10
Commercial:
Asset-based (1)	4	28,947		33,947		—	—		—
Venture capital	5	23,501		23,501		4	15,308		15,308
Other commercial	5	1,487		1,115		5	12,146		2,910
Total	23	$	57,736	$	60,187	13	$	29,018	$	19,226

	Nine Months Ended September 30,
	2018					2017
		Pre-		Post-			Pre-		Post-
		Modification		Modification			Modification		Modification
	Number	Outstanding		Outstanding		Number	Outstanding		Outstanding
	of	Recorded		Recorded		of	Recorded		Recorded
Troubled Debt Restructurings	Loans	Investment		Investment		Loans	Investment		Investment
	(Dollars in thousands)
Real estate mortgage:
Commercial	4	$	2,889	$	712	5	$	2,527	$	2,463
Residential	8	2,616		1,557		8	1,328		489
Real estate construction and land:
Residential	—	—		—		1	362		—
Commercial:
Asset-based (1)	4	28,947		33,947		2	665		665
Venture capital	9	28,737		28,737		9	28,465		28,465
Other commercial	9	13,301		12,929		17	30,153		20,918
Consumer	1	27		27		1	97		97
Total	35	$	76,517	$	77,909	43	$	63,597	$	53,097

_________________________

(1) One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was a restructuring of a loan secured by oil services equipment that was originally restructured in 2015 after being placed on nonaccrual status. The loan has since been extended four times, the last in the fourth quarter of 2017. As part of the current restructuring, additional funds were advanced in exchange for the receipt of additional equipment collateral and a partial personal guaranty.

In the three and nine months ended September 30, 2018, there were no loans restructured in the preceding 12-month period which subsequently defaulted after being restructured. In the three and nine months ended September 30, 2017, there were no loans restructured in the preceding 12-month period which subsequently defaulted after being restructured.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Allowance for Loan and Lease Losses

The following tables present a summary of the activity in the allowance for loan and lease losses on loans and leases held for investment by portfolio segment for the periods indicated:

	Three Months Ended September 30, 2018
				Real Estate
	Real Estate			Construction
	Mortgage			and Land			Commercial			Consumer			Total
	(In thousands)
Allowance for Loan and Lease Losses:
Balance, beginning of period	$	45,467		$	26,210		$	58,806		$	1,656		$	132,139
Charge-offs	(726		)	—			(2,372		)	(210		)	(3,308		)
Recoveries	222			23			1,303			41			1,589
Net (charge-offs) recoveries	(504		)	23			(1,069		)	(169		)	(1,719		)
Provision (negative provision)	1,394			(47		)	9,907			246			11,500
Balance, end of period	$	46,357		$	26,186		$	67,644		$	1,733		$	141,920

	Nine Months Ended September 30, 2018
				Real Estate
	Real Estate			Construction
	Mortgage			and Land		Commercial			Consumer			Total
	(In thousands)
Allowance for Loan and Lease Losses:
Balance, beginning of period	$	40,051		$	13,055	$	84,022		$	2,328		$	139,456
Charge-offs	(8,071		)	—		(25,321		)	(304		)	(33,696		)
Recoveries	1,999			49		7,702			136			9,886
Net (charge-offs) recoveries	(6,072		)	49		(17,619		)	(168		)	(23,810		)
Provision (negative provision)	12,378			13,082		1,241			(427		)	26,274
Balance, end of period	$	46,357		$	26,186	$	67,644		$	1,733		$	141,920
Ending Allowance by
Impairment Methodology:
Individually evaluated for impairment	$	496		$	—	$	20,363		$	—		$	20,859
Collectively evaluated for impairment	$	45,861		$	26,186	$	47,281		$	1,733		$	121,061
Ending Loans and Leases by
Impairment Methodology:
Individually evaluated for impairment	$	44,985		$	5,533	$	79,493		$	—		$	130,011
Collectively evaluated for impairment	7,633,675			1,995,424		7,072,565			398,471			17,100,135
Ending balance	$	7,678,660		$	2,000,957	$	7,152,058		$	398,471		$	17,230,146

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

	Three Months Ended September 30, 2017
				Real Estate
	Real Estate			Construction								Total			Total
	Mortgage			and Land		Commercial			Consumer			Non-PCI			PCI			Total
	(In thousands)
Allowance for Loan
and Lease Losses:
Balance, beginning of period	$	37,122		$	11,318	$	88,364		$	2,075		$	138,879		$	7,079		$	145,958
Charge-offs	(531		)	—		(4,984		)	(413		)	(5,928		)	(79		)	(6,007		)
Recoveries	36			353		4,447			29			4,865			217			5,082
Net (charge-offs) recoveries	(495		)	353		(537		)	(384		)	(1,063		)	138			(925		)
Provision (negative provision)	(186		)	22		14,366			752			14,954			(381		)	14,573
Balance, end of period	$	36,441		$	11,693	$	102,193		$	2,443		$	152,770		$	6,836		$	159,606

	Nine Months Ended September 30, 2017
				Real Estate
	Real Estate			Construction								Total			Total
	Mortgage			and Land		Commercial			Consumer			Non-PCI			PCI			Total
	(In thousands)
Allowance for Loan
and Lease Losses:
Balance, beginning of period	$	37,765		$	10,045	$	93,853		$	2,092		$	143,755		$	13,483		$	157,238
Charge-offs	(2,217		)	—		(46,965		)	(625		)	(49,807		)	(5,768		)	(55,575		)
Recoveries	286			370		8,848			104			9,608			275			9,883
Net (charge-offs) recoveries	(1,931		)	370		(38,117		)	(521		)	(40,199		)	(5,493		)	(45,692		)
Provision (negative provision)	607			1,278		46,457			872			49,214			(1,154		)	48,060
Balance, end of period	$	36,441		$	11,693	$	102,193		$	2,443		$	152,770		$	6,836		$	159,606
Ending Allowance by
Impairment Methodology:
Individually evaluated for
impairment	$	1,153		$	—	$	15,012		$	17		$	16,182
Collectively evaluated for
impairment	$	35,288		$	11,693	$	87,181		$	2,426		$	136,588
Acquired loans with
deteriorated credit quality															$	6,836
Ending Loans and Leases by
Impairment Methodology:
Individually evaluated for
impairment	$	113,304		$	5,764	$	94,078		$	106		$	213,252
Collectively evaluated for
impairment	6,017,892			1,243,458		7,767,614			385,807			15,414,771
Acquired loans with
deteriorated credit quality															$	62,494
Ending balance	$	6,131,196		$	1,249,222	$	7,861,692		$	385,913		$	15,628,023		$	62,494		$	15,690,517

29

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Allowance for Credit Losses

The allowance for credit losses is the combination of the allowance for loan and lease losses and the reserve for unfunded loan commitments. The reserve for unfunded loan commitments is included within "Accrued interest payable and other liabilities" on the condensed consolidated balance sheets. The following tables present a summary of the activity in the allowance for loan and lease losses and reserve for unfunded loan commitments for the periods indicated:

	Three Months Ended September 30, 2018
	Allowance for			Reserve for		Total
	Loan and			Unfunded Loan		Allowance for
	Lease Losses			Commitments		Credit Losses
	(In thousands)
Balance, beginning of period	$	132,139		$	35,361	$	167,500
Charge-offs	(3,308		)	—		(3,308		)
Recoveries	1,589			—		1,589
Net charge-offs	(1,719		)	—		(1,719		)
Provision	11,500			—		11,500
Balance, end of period	$	141,920		$	35,361	$	177,281

	Nine Months Ended September 30, 2018
	Allowance for			Reserve for		Total
	Loan and			Unfunded Loan		Allowance for
	Lease Losses			Commitments		Credit Losses
	(In thousands)
Balance, beginning of period	$	139,456		$	28,635	$	168,091
Charge-offs	(33,696		)	—		(33,696		)
Recoveries	9,886			—		9,886
Net charge-offs	(23,810		)	—		(23,810		)
Provision	26,274			6,726		33,000
Balance, end of period	$	141,920		$	35,361	$	177,281

	Three Months Ended September 30, 2017
	Non-PCI
	Allowance for			Reserve for					PCI			Total
	Loan and			Unfunded Loan		Allowance for			Allowance for			Allowance for
	Lease Losses			Commitments		Credit Losses			Loan Losses			Credit Losses
	(In thousands)
Balance, beginning of period	$	138,879		$	20,263	$	159,142		$	7,079		$	166,221
Charge-offs	(5,928		)	—		(5,928		)	(79		)	(6,007		)
Recoveries	4,865			—		4,865			217			5,082
Net (charge-offs) recoveries	(1,063		)	—		(1,063		)	138			(925		)
Provision (negative provision)	14,954			546		15,500			(381		)	15,119
Balance, end of period	$	152,770		$	20,809	$	173,579		$	6,836		$	180,415

30

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

	Nine Months Ended September 30, 2017
	Non-PCI
	Allowance for			Reserve for					PCI			Total
	Loan and			Unfunded Loan		Allowance for			Allowance for			Allowance for
	Lease Losses			Commitments		Credit Losses			Loan Losses			Credit Losses
	(In thousands)
Balance, beginning of period	$	143,755		$	17,523	$	161,278		$	13,483		$	174,761
Charge-offs	(49,807		)	—		(49,807		)	(5,768		)	(55,575		)
Recoveries	9,608			—		9,608			275			9,883
Net charge-offs	(40,199		)	—		(40,199		)	(5,493		)	(45,692		)
Provision (negative provision)	49,214			3,286		52,500			(1,154		)	51,346
Balance, end of period	$	152,770		$	20,809	$	173,579		$	6,836		$	180,415

NOTE 7.  FORECLOSED ASSETS

The following table summarizes foreclosed assets as of the dates indicated:

	September 30,		December 31,
Property Type	2018		2017
	(In thousands)
Construction and land development	$	219	$	219
Multi‑family	1,059		—
Single family residence	953		1,019
Commercial real estate	2,176		64
Total other real estate owned, net	4,407		1,302
Other foreclosed assets	—		27
Total foreclosed assets, net	$	4,407	$	1,329

The following table presents the changes in foreclosed assets, net of the valuation allowance, for the period indicated:

	Foreclosed
	Assets
	(In thousands)
Balance, December 31, 2017	$	1,329
Transfers to foreclosed assets from loans	3,235
Provision for losses	(65		)
Reductions related to sales	(92		)
Balance, September 30, 2018	$	4,407

31

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 8.  OTHER ASSETS

The following table presents the detail of our other assets as of the dates indicated:

	September 30,		December 31,
Other Assets	2018		2017
	(In thousands)
Cash surrender value of BOLI	$	195,547	$	193,917
Interest receivable	82,980		82,935
Taxes receivable	30,491		98,998
CRA investments	56,396		49,432
LIHTC investments	55,356		39,235
Equity investments without readily determinable fair values	14,731		14,856
Equity investments with readily determinable fair values	6,552		—
Prepaid expenses	19,341		17,800
Other	33,128		43,550
Total other assets	$	494,522	$	540,723

The Company has purchased life insurance policies on certain employees and has also acquired life insurance policies through acquisitions. BOLI is recorded at the amount that can be realized under the insurance contract, which is the cash surrender value. The increase in the cash surrender value each period is recorded to "Noninterest income - other."

The Company makes various investments for CRA investment purposes including, but not limited to, CRA-related loan pool investments, CRA-related equity investments and investments in LIHTC partnerships. The loan pool and other CRA equity investments primarily consist of investments in partnerships which provide affordable housing and participations in loan pools which provide low-cost loans to low and moderate income applicants.

The Company invests as a limited partner in LIHTC partnerships that operate qualified affordable housing projects and generate tax benefits for investors, including federal low income housing tax credits. The partnerships are deemed to be VIEs because they do not have sufficient equity investment at risk and are structured with non-substantive voting rights. We are not the primary beneficiary of the VIEs and do not consolidate them. We amortize the investment in proportion to the allocated tax benefits using the proportional amortization method of accounting and record such benefits net of investment amortization in income tax expense.

Our equity investments without readily determinable fair values include investments in privately held companies and limited partnerships as well as investments in entities from which we issued trust preferred securities. On January 1, 2018, we adopted ASU 2016-01 and ASU 2018-03 which changed the way we account for equity investments without readily determinable fair values previously accounted for using the cost method. Upon adoption, we have elected to measure our equity investments without readily determinable fair values using the measurement alternative.The Company reclassified $1.2 million of equity securities without readily determinable fair values previously included in securities available-for-sale to other assets on our condensed consolidated balance sheet in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated. Carrying values of these investments are adjusted to fair value upon observable transactions for identical or similar investments of the same issuer. During thenine months endedSeptember 30, 2018, we sold a portion ofoneof our equity investments without a readily determinable fair value for an amount in excess of its basis, and consequently increased by$286,000the remaining carrying value of this investment atSeptember 30, 2018. Beginning January 1, 2018, unrealized and realized gains and losses on equity investments without readily determinable fair values are recorded in "Noninterest income - other."

Our equity investments with readily determinable fair values include investments in public companies, often from the exercise of warrants, and publicly-traded mutual funds. The Company reclassified $5.9 million of equity securities with readily determinable fair values previously included in securities available-for-sale to other assets on our condensed consolidated balance sheet in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated. Beginning January 1, 2018, unrealized and realized gains and losses on equity investments with readily determinable fair values are recorded in "Noninterest income - other."

The remaining other assets balance of $33.1 million at September 30, 2018 consists of, among other things, other receivables, equity warrants, and derivative assets.

32

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 9. BORROWINGS AND SUBORDINATED DEBENTURES

Borrowings

The following table summarizes our borrowings as of the dates indicated:

	September 30, 2018				December 31, 2017
			Weighted				Weighted
			Average				Average
	Amount		Rate		Amount		Rate
	(Dollars in thousands)
Non‑recourse debt	$	166	7.23	%	$	342	6.87	%
FHLB secured advances	1,135,000		2.33	%	332,000		1.41	%
FHLB unsecured overnight advance	143,000		2.30	%	135,000		1.34	%
AFX borrowings	235,000		2.34	%	—		—	%
Total borrowings	$	1,513,166			$	467,342

The non‑recourse debt represents the payment stream of certain equipment leases sold to third parties. The debt is secured by the leased equipment and all interest rates are fixed. As of September 30, 2018, this debt had a weighted average remaining maturity of 1.1 years.

The Bank has established secured and unsecured lines of credit under which it may borrow funds from time to time on a term or overnight basis from the FHLB, the FRBSF, and other financial institutions.

FHLB Secured Line of Credit. The Bank had secured financing capacity with the FHLB as of September 30, 2018 of $3.6 billion, collateralized by a blanket lien on $5.2 billion of certain qualifying loans. As of September 30, 2018, the balance outstanding was a $1.1 billion overnight advance. As of December 31, 2017, the balance outstanding was a $332.0 million overnight advance.

FRBSF Secured Line of Credit. The Bank has a secured line of credit with the FRBSF. As of September 30, 2018, the Bank had secured borrowing capacity of $2.1 billion collateralized by liens covering $2.8 billion of certain qualifying loans. As of September 30, 2018 and December 31, 2017, there were no balances outstanding.

FHLB Unsecured Line of Credit. The Bank has a $143.0 million unsecured line of credit with the FHLB for the purchase of overnight funds, of which $143.0 million was outstanding at September 30, 2018. At December 31, 2017, the balance outstanding was $135.0 million.

Federal Funds Arrangements with Commercial Banks. As of September 30, 2018, the Bank had unsecured lines of credit of $125.0 million with correspondent banks for the purchase of overnight funds, subject to availability of funds. These lines are renewable annually and have no unused commitment fees. As of September 30, 2018 and December 31, 2017, there were no balances outstanding. The Bank is a member of the AFX, through which it may either borrow or lend funds on an overnight or short-term basis with a group of pre-approved commercial banks. The availability of funds changes daily. As of September 30, 2018, the balance outstanding was $235.0 million, which consisted of a $225.0 million overnight borrowing and a $10.0 million one-month borrowing with a maturity date of October 29, 2018. As of December 31, 2017, there was no balance outstanding.

33

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Subordinated Debentures

The following table summarizes the terms of each issuance of subordinated debentures outstanding as of the dates indicated:

	September 30, 2018					December 31, 2017					Date	Maturity	Rate Index
Series	Amount			Rate		Amount			Rate		Issued	Date	(Quarterly Reset)
	(Dollars in thousands)
Trust V	$	10,310		5.43	%	$	10,310		4.70	%	8/15/2003	9/17/2033	3 month LIBOR + 3.10
Trust VI	10,310			5.38	%	10,310			4.64	%	9/3/2003	9/15/2033	3 month LIBOR + 3.05
Trust CII	5,155			5.28	%	5,155			4.55	%	9/17/2003	9/17/2033	3 month LIBOR + 2.95
Trust VII	61,856			5.09	%	61,856			4.13	%	2/5/2004	4/23/2034	3 month LIBOR + 2.75
Trust CIII	20,619			4.02	%	20,619			3.28	%	8/15/2005	9/15/2035	3 month LIBOR + 1.69
Trust FCCI	16,495			3.93	%	16,495			3.19	%	1/25/2007	3/15/2037	3 month LIBOR + 1.60
Trust FCBI	10,310			3.88	%	10,310			3.14	%	9/30/2005	12/15/2035	3 month LIBOR + 1.55
Trust CS 2005-1	82,475			4.28	%	82,475			3.54	%	11/21/2005	12/15/2035	3 month LIBOR + 1.95
Trust CS 2005-2	128,866			4.29	%	128,866			3.33	%	12/14/2005	1/30/2036	3 month LIBOR + 1.95
Trust CS 2006-1	51,545			4.29	%	51,545			3.33	%	2/22/2006	4/30/2036	3 month LIBOR + 1.95
Trust CS 2006-2	51,550			4.29	%	51,550			3.33	%	9/27/2006	10/30/2036	3 month LIBOR + 1.95
Trust CS 2006-3 (1)	29,909			1.69	%	30,986			1.72	%	9/29/2006	10/30/2036	3 month EURIBOR + 2.05
Trust CS 2006-4	16,470			4.29	%	16,470			3.33	%	12/5/2006	1/30/2037	3 month LIBOR + 1.95
Trust CS 2006-5	6,650			4.29	%	6,650			3.33	%	12/19/2006	1/30/2037	3 month LIBOR + 1.95
Trust CS 2007-2	39,177			4.29	%	39,177			3.33	%	6/13/2007	7/30/2037	3 month LIBOR + 1.95
Trust I (2)	—			—	%	6,186			3.64	%	12/10/2004	3/15/2035	3 month LIBOR + 2.05
Trust II (2)	—			—	%	3,093			3.34	%	12/23/2005	3/15/2036	3 month LIBOR + 1.75
Trust III (2)	—			—	%	3,093			3.44	%	6/30/2006	9/18/2036	3 month LIBOR + 1.85
Gross subordinated debentures	541,697					555,146
Unamortized discount (3)	(88,753		)			(92,709		)
Net subordinated debentures	$	452,944				$	462,437

___________________

(1) Denomination is in Euros with a value of €25.8 million.

(2) Acquired in the CUB acquisition on October 20, 2017 and redeemed in the first quarter of 2018.

(3) Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions.

Interest payments made by the Company on subordinated debentures are considered dividend payments under FRB regulations. Bank holding companies, such as PacWest, are required to notify the FRB prior to declaring and paying a dividend during any period in which quarterly and/or cumulative twelve‑month net earnings are insufficient to fund the dividend amount, among other requirements.

34

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 10. COMMITMENTS AND CONTINGENCIES

Lending Commitments

The Company is a party to financial instruments with off‑balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the condensed consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of involvement that the Company has in particular classes of financial instruments.

The following table presents a summary of the financial instruments described above as of the dates indicated:

	September 30,		December 31,
	2018		2017
	(In thousands)
Loan commitments to extend credit	$	7,055,833	$	6,234,061
Standby letters of credit	335,651		320,063
Total	$	7,391,484	$	6,554,124

Commitments to extend credit are contractual agreements to lend to our customers when customers are in compliance with their contractual credit agreements and when customers have contractual availability to borrow under such agreements. 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 amounts do not necessarily represent future cash requirements. The increase in loan commitments to extend credit is primarily a result of the continued growth of our real estate construction and venture capital portfolios.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. We provide standby letters of credit in conjunction with several of our lending arrangements and property lease obligations. Most guarantees expire within one year from the date of issuance. If a borrower defaults on its commitments subject to any letter of credit issued under these arrangements, we would be required to meet the borrower's financial obligation but would seek repayment of that financial obligation from the borrower. In some cases, borrowers have pledged cash and investment securities as collateral with us under these arrangements.

In addition, the Company invests in low income housing project partnerships, which provide income tax credits, and in small business investment companies that call for capital contributions up to an amount specified in the partnership agreements. As of September 30, 2018 and December 31, 2017, we had commitments to contribute capital to these entities totaling $104.6 million and $62.6 million. We also had commitments to contribute up to an additional $403,000 and $2.5 million to private equity funds at September 30, 2018 and December 31, 2017.

Legal Matters

In the ordinary course of our business, the Company is party to various legal actions, which we believe are incidental to the operation of our business. The outcome of such legal actions and the timing of ultimate resolution are inherently difficult to predict. In the opinion of management, based upon currently available information, any resulting liability, in addition to amounts already accrued, and taking into consideration insurance which may be applicable, would not have a material adverse effect on the Company’s financial statements or operations.

35

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 11.  FAIR VALUE MEASUREMENTS

ASC Topic 820, “Fair Value Measurement,” defines fair value, establishes a framework for measuring fair value including a three‑level valuation hierarchy, and expands disclosures about fair value measurements. Fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date reflecting assumptions that a market participant would use when pricing an asset or liability. The hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows:

• Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets.

• Level 2: Observable inputs other than Level 1, including quoted prices for similar assets and liabilities in active markets, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data, either directly or indirectly, for substantially the full term of the financial instrument. This category generally includes municipal securities, agency residential and commercial MBS, collateralized loan obligations, registered publicly rated private label CMOs, corporate debt securities, SBA securities, and asset-backed securitizations.

• Level 3: Inputs to a valuation methodology that are unobservable, supported by little or no market activity, and significant to the fair value measurement. These valuation methodologies generally include pricing models, discounted cash flow models, or a determination of fair value that requires significant management judgment or estimation. This category also includes observable inputs from a pricing service not corroborated by observable market data, and includes our non-rated private label CMOs, non-rated private label asset-backed securities, and equity warrants.

The Company uses fair value to measure certain assets and liabilities on a recurring basis, primarily securities available‑for‑sale and derivatives. For assets measured at the lower of cost or fair value, the fair value measurement criteria may or may not be met during a reporting period and such measurements are therefore considered “nonrecurring” for purposes of disclosing our fair value measurements. Fair value is used on a nonrecurring basis to adjust carrying values for impaired loans and other real estate owned and also to record impairment on certain assets, such as goodwill, CDI, and other long‑lived assets.

The following tables present information on the assets and liabilities measured and recorded at fair value on a recurring basis as of the dates indicated:

	Fair Value Measurements as of
	September 30, 2018
Measured on a Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Securities available‑for‑sale:
Residential MBS and CMOs:
Agency MBS	$	249,831	$	—	$	249,831	$	—
Agency CMOs	569,605		—		569,605		—
Private label CMOs	110,450		—		97,327		13,123
Municipal securities	1,271,583		—		1,271,583		—
Agency commercial MBS	1,077,005		—		1,077,005		—
U.S. Treasury securities	397,631		397,631		—		—
SBA securities	67,586		—		67,586		—
Asset-backed securities	58,452		—		29,353		29,099
Corporate debt securities	18,190		—		18,190		—
Total securities available-for-sale	3,820,333		397,631		3,380,480		42,222
Equity warrants	4,962		—		—		4,962
Other derivative assets	2,072		—		2,072		—
Equity investments with readily determinable fair values	6,552		6,552		—		—
Total recurring assets	$	3,833,919	$	404,183	$	3,382,552	$	47,184
Derivative liabilities	$	468	$	—	$	468	$	—

36

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

	Fair Value Measurements as of
	December 31, 2017
Measured on a Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Securities available‑for‑sale:
Residential MBS and CMOs:
Agency MBS	$	246,274	$	—	$	246,274	$	—
Agency CMOs	275,709		—		275,709		—
Private label CMOs	125,987		—		103,113		22,874
Municipal securities	1,680,068		—		1,680,068		—
Agency commercial MBS	1,163,969		—		1,163,969		—
SBA securities	160,334		—		160,334		—
Asset-backed securities	88,710		—		46,601		42,109
Corporate debt securities	19,295		—		19,295		—
Collateralized loan obligations	7,015		—		7,015		—
Equity investments (1)	7,070		5,922		1,148		—
Total securities available-for-sale	3,774,431		5,922		3,703,526		64,983
Equity warrants	5,161		—		—		5,161
Other derivative assets	1,873		—		1,873		—
Total recurring assets	$	3,781,465	$	5,922	$	3,705,399	$	70,144
Derivative liabilities	$	1,379	$	—	$	1,379	$	—

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

During the nine months endedSeptember 30, 2018, there was a $75,000 transfer from Level 3 equity warrants to Level 1 equity investments with readily determinable fair values measured on a recurring basis.

The following table presents information about quantitative inputs and assumptions used to determine the fair values provided by our third party pricing service for our Level 3 private label CMOs and asset-backed securities available-for-sale measured at fair value on a recurring basis as of the date indicated:

	September 30, 2018
	Private Label CMOs		Asset-Backed Securities
		Weighted		Weighted
	Range	Average	Range	Average
Unobservable Inputs	of Inputs	Input	of Inputs	Input
Voluntary annual prepayment speeds	4.8% - 30.5%	9.4%	5% - 15%	14.2%
Annual default rates	0.0% - 25.3%	2.2%	1% - 2%	1.9%
Loss severity rates	5.2% - 135.5%	47.3%	10% - 60%	55.9%
Discount rates	2.2% - 10.5%	6.2%	3.2% - 4.3%	3.6%

37

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table presents information about quantitative inputs and assumptions used in the modified Black-Scholes option pricing model to determine the fair value for our Level 3 equity warrants measured at fair value on a recurring basis as of the date indicated:

	September 30, 2018
	Equity Warrants
	Weighted
	Average
Unobservable Inputs	Input
Volatility	16.3%
Risk-free interest rate	2.9%
Remaining life assumption (in years)	3.6

The following table summarizes activity for our Level 3 private label CMOs available-for-sale, asset-backed securities available-for-sale, and equity warrants measured at fair value on a recurring basis for the period indicated:

	Private			Asset-Backed			Equity
	Label CMOs			Securities			Warrants
	(In thousands)
Balance, December 31, 2017	$	22,874		$	42,109		$	5,161
Total included in earnings	595			(35		)	5,291
Total included in other comprehensive income	(511		)	220			—
Issuances	—			—			557
Salesand dispositions (1)	—			—			(5,972		)
Net settlements	(9,835		)	(13,195		)	—
Transfers to Level 1	—			—			(75		)
Balance, September 30, 2018	$	13,123		$	29,099		$	4,962

______________________

(1) Includes the exercise of warrants that upon exercise become equity securities in public companies. These are often subject to lock-up restrictions that must be met before the equity security can be sold, during which time they are reported as equity investments with readily determinable fair values.

The following tables present assets measured at fair value on a non‑recurring basis as of the dates indicated:

	Fair Value Measurement as of
	September 30, 2018
Measured on a Non‑Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Impaired loans	$	41,103	$	—	$	15,423	$	25,680
OREO	953		—		953		—
Total non-recurring	$	42,056	$	—	$	16,376	$	25,680

	Fair Value Measurement as of
	December 31, 2017
Measured on a Non‑Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Impaired Non‑PCI loans	$	61,095	$	—	$	5,143	$	55,952
Loans held for sale	483,563		—		483,563		—
Total non-recurring	$	544,658	$	—	$	488,706	$	55,952

38

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table presents losses recognized on assets measured on a nonrecurring basis for the periods indicated:

	Three Months Ended				Nine Months Ended
Losses on Assets	September 30,				September 30,
Measured on a Non‑Recurring Basis	2018		2017		2018		2017
	(In thousands)
Impaired loans (1)	$	14,347	$	4,427	$	31,351	$	17,895
OREO	—		2,124		65		2,124
Total losses	$	14,347	$	6,551	$	31,416	$	20,019

__________________________

(1) Losses for 2018 periods relate to total loans. Losses for 2017 periods relate to Non-PCI loans.

The following table presents the valuation methodology and unobservable inputs for Level 3 assets measured at fair value on a nonrecurring basis as of the date indicated:

	September 30, 2018
			Valuation	Unobservable		Weighted
Asset	Fair Value		Technique	Inputs	Range	Average
	(In thousands)
Impaired loans	$	12,531	Discounted cash flows	Discount rates	3.75% - 7.75%	6.81%
Impaired loans	6,819		Internal enterprise value methodology	(1)	(1)	(1)
Impaired loans	6,330		Third party appraisals	No discounts
Total non-recurring Level 3	$	25,680

__________________________

(1) In determining the fair value of these loans, we used different factors related to each borrower. These factors are specific to each borrower and a weighted average value or range of values of the unobservable inputs is not meaningful.

ASC Topic 825, “Financial Instruments,” (as amended by ASU 2016-01 and ASU 2018-03) requires disclosure of the estimated fair value of certain financial instruments and the methods and significant assumptions used to estimate such fair values. Additionally, certain financial instruments and all nonfinancial instruments are excluded from the applicable disclosure requirements.

On January 1, 2018, we adopted ASU 2016-01 and ASU 2018-03 which requires the use of the exit price notion when measuring the fair values of financial instruments for disclosure purposes. Starting in the first quarter of 2018, we updated our methodology used to estimate fair values for our loan portfolios to conform to the new requirements.

39

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables present carrying amounts and estimated fair values of certain financial instruments as of the dates indicated:

	September 30, 2018
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and due from banks	$	196,502	$	196,502	$	196,502	$	—	$	—
Interest‑earning deposits in financial institutions	185,284		185,284		185,284		—		—
Securities available‑for‑sale	3,820,333		3,820,333		397,631		3,380,480		42,222
Investment in FHLB stock	31,077		31,077		—		31,077		—
Loans and leases held for investment, net	17,088,226		16,876,611		—		15,423		16,861,188
Equity warrants	4,962		4,962		—		—		4,962
Other derivative assets	2,072		2,072		—		2,072		—
Equity investments with readily determinable fair values	6,552		6,552		6,552		—		—
Financial Liabilities:
Core deposits	15,512,742		15,512,742		—		15,512,742		—
Non-core non-maturity deposits	483,528		483,528		—		483,528		—
Time deposits	1,883,273		1,894,024		—		1,894,024		—
Borrowings	1,513,166		1,513,163		1,503,000		10,163		—
Subordinated debentures	452,944		435,505		—		435,505		—
Derivative liabilities	468		468		—		468		—

	December 31, 2017
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and due from banks	$	233,215	$	233,215	$	233,215	$	—	$	—
Interest‑earning deposits in financial institutions	165,222		165,222		165,222		—		—
Securities available‑for‑sale	3,774,431		3,774,431		5,922		3,703,526		64,983
Investment in FHLB stock	20,790		20,790		—		20,790		—
Loans held for sale	481,100		483,563		—		483,563		—
Loans and leases held for investment, net	16,833,287		17,023,098		—		5,143		17,017,955
Equity warrants	5,161		5,161		—		—		5,161
Other derivative assets	1,873		1,873		—		1,873		—
Financial Liabilities:
Core deposits	15,937,012		15,937,012		—		15,937,012		—
Non-core non-maturity deposits	863,202		863,202		—		863,202		—
Time deposits	2,065,322		2,055,104		—		2,055,104		—
Borrowings	467,342		467,342		467,000		342		—
Subordinated debentures	462,437		444,383		—		444,383		—
Derivative liabilities	1,379		1,379		—		1,379		—

40

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

For information regarding the valuation methodologies used to measure our assets recorded at fair value (under ASC Topic 820), and for estimating fair value for financial instruments not recorded at fair value (under ASC Topic 825, as amended by ASU 2016-01 and ASU 2018-03), see Note 1. Nature of Operations and Summary of Significant Accounting Policies, and Note 12. Fair ValueMeasurements, to the Consolidated Financial Statements of the Company's 2017 Annual Report on Form 10-K.

Limitations

Fair value estimates are made at a specific point in time and are based on relevant market information and information about the financial instrument. These estimates do not reflect income taxes or any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a portion of the Company’s financial instruments, fair value estimates are based on what management believes to be reasonable judgments regarding expected future cash flows, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimated fair values are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Since the fair values have been estimated as of September 30, 2018, the amounts that will actually be realized or paid at settlement or maturity of the instruments could be significantly different.

NOTE 12. EARNINGS PER SHARE

The following table presents the computations of basic and diluted net earnings per share for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Dollars in thousands, except per share data)
Basic Earnings Per Share:
Net earnings	$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Less: Earnings allocated to unvested restricted stock(1)	(1,428		)	(1,348		)	(1,149		)	(3,899		)	(3,239		)
Net earnings allocated to common shares	$	114,859		$	114,387		$	100,317		$	346,399		$	270,542
Weighted-average basic shares and unvested restricted
stock outstanding	123,657			126,082			121,447			125,728			121,405
Less: Weighted-average unvested restricted stock
outstanding	(1,537		)	(1,466		)	(1,394		)	(1,473		)	(1,450		)
Weighted-average basic shares outstanding	122,120			124,616			120,053			124,255			119,955
Basic earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26
Diluted Earnings Per Share:
Net earnings allocated to common shares	$	114,859		$	114,387		$	100,317		$	346,399		$	270,542
Weighted-average basic shares outstanding	122,120			124,616			120,053			124,255			119,955
Diluted earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26

________________________

(1) Represents cash dividends paid to holders of unvested restricted stock, net of forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

41

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 13. REVENUE FROM CONTRACTS WITH CUSTOMERS

The Company adopted Topic 606 Revenue from Contracts with Customers effective as of January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. Revenue from contracts with customers in the scope of Topic 606 is measured based on the consideration specified in the contract with a customer, and excludes amounts collected on behalf of third parties. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company's performance obligations are typically satisfied as services are rendered and payment is generally collected at the time services are rendered, or on a monthly, quarterly or annual basis. The Company had no material unsatisfied performance obligations as of September 30, 2018.

In certain cases, other parties are involved with providing products and services to our customers. If the Company is a principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue. Rebates, waivers, and reversals are recorded as a reduction of revenue either when the revenue is recognized by the Company or at the time the rebate, waiver, or reversal is earned by the customer.

The Company has elected the following practical expedients: (1) we do not disclose information about remaining performance obligations that have original expected durations of one year or less; and (2) we do not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the Company transfers the goods or services and when the customer pays for that good or service will be one year or less.

Nature of Goods and Services

Substantially all of the Company's revenue, such as interest income on loans, investment securities, and interest-earning deposits in financial institutions, is specifically out-of-scope of Topic 606. For the revenue that is in-scope, the following is a description of principal activities, separated by the timing of revenue recognition, from which the Company generates its revenue from contracts with customers:

• Revenue earned at a point in time.Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, NSF fees, and credit and debit card interchange fees. Revenue is generally derived from transactional information accumulated by our systems and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer's transaction. The Company is the principal in each of these contracts with the exception of credit and debit card interchange fees, in which case the Company is acting as the agent and records revenue net of expenses paid to the principal.

• Revenue earned over time.The Company earns certain revenue from contracts with customers monthly. Examples of this type of revenue are deposit account service fees, investment management fees, merchant referral services, MasterCard marketing incentives and safe deposit box fees. Account service charges, management fees and referral fees are recognized on a monthly basis while any transaction-based revenue is recorded as the activity occurs. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems. Revenue is recorded in the same period as the related transactions occur or services are rendered to the customer.

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PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

Disaggregation of Revenue

The following table presents interest income and noninterest income, the components of total revenue, as disclosed in the condensed consolidated statements of earnings and the related amounts which are from contracts with customers within the scope of Topic 606. As illustrated here, substantially all of our revenue is specifically excluded from the scope of Topic 606.

	Three Months Ended September 30, 2018				Nine Months Ended September 30, 2018
	Total		Revenue from		Total		Revenue from
	Recorded		Contracts with		Recorded		Contracts with
	Revenue		Customers		Revenue		Customers
	(In thousands)
Total interest income	$	292,642	$	—	$	858,931	$	—
Noninterest income:
Service charges on deposit accounts	3,979		3,979		12,418		12,418
Other commissions and fees	12,397		4,767		34,429		14,519
Leased equipment income	9,120		—		28,497		—
Gain on sale of loans	—		—		4,675		—
Gain on sale of securities	826		—		7,390		—
Other income	10,590		444		27,700		1,341
Total noninterest income	36,912		9,190		115,109		28,278
Total revenue	$	329,554	$	9,190	$	974,040	$	28,278

The following table presents revenue from contracts with customers based on the timing of revenue recognition for the period indicated:

	Three Months Ended		Nine Months Ended
	September 30, 2018		September 30, 2018
	(In thousands)
Products and services transferred at a point in time	$	4,604	$	14,195
Products and services transferred over time	4,586		14,083
Total revenue from contracts with customers	$	9,190	$	28,278

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers:

	September 30, 2018
	(In thousands)
Receivables, which are included in "Other assets"	$	1,701
Contract assets, which are included in "Other assets"	$	—
Contract liabilities, which are included in "Interest payable and other liabilities"	$	654

Contract liabilities relate to advance consideration received from customers for which revenue is recognized over the life of the contract. The change in contract liabilities for the nine months endedSeptember 30, 2018 due to revenue recognized that was included in the contract liability balance at the beginning of the period was $98,000.

43

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 14. STOCK-BASED COMPENSATION

The Company’s 2017 Stock Incentive Plan, or the 2017 Plan, permits stock-based compensation awards to officers, directors, employees, and consultants. As of September 30, 2018, the 2017 Plan authorized grants of stock‑based compensation instruments to purchase or issue up to 4,000,000 shares of Company common stock. As of September 30, 2018, there were 3,138,923 shares available for grant under the 2017 Plan. Though frozen for new issuances, certain awards issued under the 2003 Stock Incentive Plan, or the 2003 Plan, remain outstanding.

Restricted Stock

Restricted stock amortization totaled $8.1 million, $6.9 million, and $6.5 million for the three months ended September 30, 2018, June 30, 2018, and September 30, 2017, and $22.3 million and $19.6 million for the nine months ended September 30, 2018 and 2017. Such amounts are included in "Compensation expense" on the condensed consolidated statements of earnings. The amount of unrecognized compensation expense related to unvested TRSAs and PRSUs as of September 30, 2018 totaled $59.3 million.

Time-Based Restricted Stock Awards

At September 30, 2018, there were 1,529,273 shares of unvested TRSAs outstanding pursuant to the Company's 2003 and 2017 Stock Incentive Plans (the "Plans"). The TRSAs generally vest ratably over a service period of three or four years from the date of the grant or immediately upon death of an employee. Compensation expense related to TRSAs is based on the fair value of the underlying stock on the award date and is recognized over the vesting period using the straight‑line method.

Performance-Based Restricted Stock Units

At September 30, 2018, there were 325,741 unvested PRSUs granted. The PRSUs will vest only if performance goals with respect to certain financial metrics are met over a three-year performance period. The PRSUs are not considered issued and outstanding under either the 2017 Plan or the 2003 Plan until they vest. PRSUs are granted and initially expensed based on a target number. The number of shares that will ultimately vest based on actual performance will range from zero to a maximum of either 150% or 200% of target. Compensation expense related to PRSUs is based on the fair value of the underlying stock on the award date and is amortized over the vesting period using the straight-line method unless it is determined that: (1) attainment of the financial metrics is less than probable, in which case a portion of the amortization is suspended, or (2) attainment of the financial metrics is improbable, in which case a portion of the previously recognized amortization is reversed and also suspended. If it is determined that attainment of a financial measure higher than target is probable, the amortization will increase to up to 150% or 200% of the target amortization amount. Annual PRSU expense may vary during the three-year performance period based upon changes in management's estimate of the number of shares that may ultimately vest. In the case where the performance target for the PRSU is based on a market condition (such as total shareholder return), the amortization is neither reversed nor suspended if it is subsequently determined that the attainment of the performance target is less than probable or improbable.

44

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 15.  RECENTLY ISSUED ACCOUNTING STANDARDS

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which, among other things, requires lessees to recognize most leases on-balance sheet, which will result in an increase in their reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. ASU 2016-02 supersedes Topic 840, Leases, and is effective for annual and interim periods in fiscal years beginning after December 15, 2018. There have been further amendments, including practical expedients, with the issuance of ASU 2018-01, “Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842” in January 2018, ASU 2018-10, “Codification Improvements to Topic 842, Leases” in July 2018, and ASU 2018-11, "Leases (Topic 842): Targeted Improvements" in July 2018.

The amendments in ASU 2018-11 provide an optional transition method when adopting Topic 842, which allows companies to elect not to adjust their comparative period financial information and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, effectively applying the requirements of the new standard prospectively. The Company will adopt the standard effective January 1, 2019 and will elect the optional transition method and recognize a cumulative-effect adjustment to retained earnings upon adoption. In addition, the Company will be electing a number of practical expedients permitted under the new standard including carrying forward the historical lease classification and accounting for non-lease and lease components together as a single lease component, and not recognizing a right-of-use asset and lease liability for short-term leases.

The primary impact of the new standard to the Company relates to leased branches and office space which are currently accounted for as operating leases. The Company is on track with its implementation plan which includes a new software solution and changes to our processes, procedures, and internal controls. While the ultimate quantitative impact of adoption will not be known until adoption, based on the lease population as of September 30, 2018, the Company anticipates recording lease right-of-use assets and liabilities of approximately $120 to $140 million on its consolidated balance sheet, with no material impact to its consolidated statements of earnings. However, the ultimate impact of adopting ASU 2016-02 will depend on the Company’s lease population and discount rates as of the adoption date. From a lessor perspective, the Company anticipates recognizing more sales-type leases that are currently accounted for as direct financing leases. The change in the definition of initial direct costs to include only incremental direct costs will also result in an acceleration of certain operating costs. Given the limited changes to lessor accounting, the Company does not expect material changes to its consolidated financial statements for the lessor accounting changes.

In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which significantly changes the way entities recognize credit losses and impairment of financial assets recorded at amortized cost. Currently, the credit loss and impairment model for loans and leases is based on incurred losses, and investments are recognized as impaired when there is no longer an assumption that future cash flows will be collected in full under the originally contracted terms. Under the new current expected credit loss ("CECL") model, the standard requires immediate recognition of estimated credit losses expected to occur over the remaining life of the asset. The forward-looking concept of CECL to estimate future credit losses will broaden the range of data to consider including past and current events and conditions along with reasonable and supportable forecasts that may affect expected collectability. The new standard will add new disclosure requirements and impact the Company’s processes and internal controls over financial reporting.

The Company has established a multidisciplinary project team and implementation plan, selected a software solution, developed a conceptual framework, and is engaged in the implementation phase of the project. The Company, with the assistance of a third party adviser, continues to work on: (1) developing a new expected loss model with supportable assumptions, (2) identifying data, reporting, and drafting future disclosures, (3) assessing updates to accounting policies, and (4) documenting new processes and controls.

The Company expects to begin testing and sensitivity analysis on its initial modeling assumptions and results in the first quarter of 2019. ASU 2016-13 is effective for interim and annual periods in fiscal years beginning after December 15, 2019, with earlier adoption permitted. The Company plans to adopt this standard on January 1, 2020. Entities are required to use a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted (modified-retrospective approach). A prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the adoption date. The new standard will be significant to the policies, processes, and methodology used to determine credit losses; however, the Company has not yet determined the quantitative effect ASU 2016-13 will have on its consolidated financial position and results of operations.

45

PACWEST BANCORP AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which intends to simplify goodwill impairment testing by eliminating the second step of the analysis under which the implied fair value of goodwill is determined as if the reporting unit were being acquired in a business combination. ASU 2017-04 instead requires entities to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for any amount by which the carrying amount exceeds the reporting unit's fair value, to the extent that the loss recognized does not exceed the amount of goodwill allocated to that reporting unit. ASU 2017-04 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2017-04 to have a material impact on its consolidated financial position or results of operations.

In June 2018, the FASB issued ASU 2018-07, “Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,” which simplifies the accounting for share-based payments granted to nonemployees for goods and services by aligning with the requirements for share-based payments granted to employees. The Company does not expect the adoption of ASU 2018-07 to have a material impact on its consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements,” which changes the fair value measurement disclosure requirements of ASC 820. ASU 2018-13 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2018-13 to have a material impact on its consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract (a consensus of the FASB Emerging Issues Task Force)," which aligns the requirements for capitalizing implementation costs in a cloud computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. The new guidance also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. ASU 2018-15 is effective for the Company on January 1, 2020 and the Company has the option to adopt the new standard either prospectively to eligible costs incurred on or after the date this guidance is first applied or retrospectively. Early adoption is permitted. The Company does not expect ASU 2018-15 to have a material impact on its consolidated financial position or results of operations.

NOTE 16. SUBSEQUENT EVENTS

Common Stock Dividends

On November 1, 2018, the Company announced that the Board of Directors had declared a quarterly cash dividend of $0.60 per common share. The cash dividend is payable on November 30, 2018 to stockholders of record at the close of business on November 20, 2018.

The Company has evaluated events that have occurred subsequent to September 30, 2018 and have concluded there are no other subsequent events that would require recognition in the accompanying consolidated financial statements.

46

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Information

This Form 10-Q contains certain “forward-looking statements” about the Company and its subsidiaries within the meaning of the Private Securities Litigation Reform Act of 1995, including certain plans, strategies, goals, and projections and including statements about our expectations regarding our pending acquisition of El Dorado, capital management, including reducing excess capital, intentions to expand the Bank’s lending business; net interest income, net interest margin, allowance for loan and lease losses, deposit growth, loan and lease portfolio growth and production, liquidity, profitability, goodwill and intangible assets, interest rate risk management, and effective tax rates. All statements contained in this Form 10-Q that are not clearly historical in nature are forward-looking, and the words “anticipate,” “assume,” “intend,” “believe,” “forecast,” “expect,” “estimate,” “plan,” “continue,” “will,” “should,” “look forward” and similar expressions are generally intended to identify forward-looking statements. All forward-looking statements (including statements regarding future financial and operating results and future transactions and their results) involve risks, uncertainties and contingencies, many of which are beyond our control, which may cause actual results, performance, or achievements to differ materially from anticipated results, performance or achievements. Actual results could differ materially from those contained or implied by such forward-looking statements for a variety of factors, including without limitation:

• our ability to complete future acquisitions, including the pending El Dorado acquisition, and to successfully integrate such acquired entities or achieve expected benefits, synergies and/or operating efficiencies within expected time frames or at all;

• our ability to obtain regulatory approvals and meet other closing conditions to the pending El Dorado acquisition on the expected terms and schedule;

• changes in our stock price before completion of the pending El Dorado acquisition, including as a result of the financial performance of the Company or El Dorado prior to closing;

• the reaction to the pending El Dorado acquisition of the companies' customers, employees and counterparties;

• our ability to compete effectively against other financial service providers in our markets;

• the impact of changes in interest rates or levels of market activity, especially on the fair value of our loan and investment portfolios;

• deterioration, weaker than expected improvement, or other changes in the state of the economy or the markets in which we conduct business (including the levels of initial public offerings and mergers and acquisitions), which may affect the ability of borrowers to repay their loans and the value of real property or other property held as collateral for such loans;

• changes in credit quality and the effect of credit quality on our provision for credit losses and allowance for loan and lease losses;

• our ability to attract deposits and other sources of funding or liquidity;

• the need to retain capital for strategic or regulatory reasons;

• compression of the net interest margin due to changes in the interest rate environment, forward yield curves, loan products offered, spreads on newly originated loans and leases, asset mix and/or changes to the cost of deposits and borrowings;

• reduced demand for our services due to strategic or regulatory reasons;

• our ability to successfully execute on initiatives relating to enhancements of our technology infrastructure, including client-facing systems and applications;

• legislative or regulatory requirements or changes, including an increase of capital requirements, and increased political and regulatory uncertainty;

• the impact on our reputation and business from our interactions with business partners, counterparties, service providers and other third parties;

• higher than anticipated increases in operating expenses;

• lower than expected dividends paid from the Bank to the holding company;

• a deterioration in the overall macroeconomic conditions or the state of the banking industry that could warrant further analysis of the carrying value of goodwill and could result in an adjustment to its carrying value resulting in a non-cash charge;

• the effectiveness of our risk management framework and quantitative models;

47

• the costs and effects of legal, compliance, and regulatory actions, changes and developments, including the impact of adverse judgments or settlements in litigation, the initiation and resolution of regulatory or other governmental inquiries or investigations, and/or the results of regulatory examinations or reviews;

• the impact of changes made to tax laws or regulations affecting our business, including the disallowance of tax benefits by tax authorities and/or changes in tax filing jurisdictions or entity classifications; and

• our success at managing risks involved in the foregoing items and all other risk factors described in our audited consolidated financial statements, and other risk factors described in this Form 10-Q and other documents filed or furnished by PacWest with the SEC.

All forward-looking statements included in this Form 10-Q are based on information available at the time the statement is made. We are under no obligation to (and expressly disclaim any such obligation to) update or alter our forward-looking statements, whether as a result of new information, future events or otherwise except as required by law.

Overview

PacWest Bancorp is a bank holding company registered under the BHCA. Our principal business is to serve as the holding company for our Beverly Hills‑based wholly-owned banking subsidiary, Pacific Western Bank. References to “Pacific Western” or the “Bank” refer to Pacific Western Bank together with its wholly-owned subsidiaries. References to “we,” “us,” or the “Company” refer to PacWest Bancorp together with its subsidiaries on a consolidated basis. When we refer to “PacWest” or to the “holding company,” we are referring to PacWest Bancorp, the parent company, on a stand-alone basis.

The Bank is focused on relationship-based business banking to small, middle-market, and venture-backed businesses nationwide. At September 30, 2018, the Bank offers a broad range of loan and lease and deposit products and services through 74 full-service branches located throughout the state of California, one branch located in Durham, North Carolina, and numerous loan production offices located in cities across the country. Community Banking provides lending and comprehensive deposit and treasury management services to small and medium-sized businesses conducted primarily through our California-based branch offices. We offer additional products and services through our National Lending and Venture Banking groups. National Lending provides asset-based, equipment, real estate, and security cash flow loans and treasury management services to established middle-market businesses on a national basis. Venture Banking offers a comprehensive suite of financial services focused on entrepreneurial businesses and their venture capital and private equity investors, with offices located in key innovation hubs across the United States. In addition, we provide investment advisory and asset management services to select clients through Square 1 Asset Management, Inc., a wholly-owned subsidiary of the Bank and a SEC-registered investment adviser.

In managing the top line of our business, we focus on loan growth, loan yield, deposit cost, and net interest margin. Net interest income, on a year-to-date basis in 2018, accounted for 87.1% of our net revenue (net interest income plus noninterest income).

At September 30, 2018, we had total assets of $24.8 billion, including $17.2 billion of total loans and leases, net of deferred fees, and $3.8 billion of securities available-for-sale, compared to $25.0 billion of total assets, including $17.5 billion of total loans and leases, net of deferred fees, and $3.8 billion of securities available-for-sale at December 31, 2017. The $212.8 million decrease in total assets since year-end was due primarily to a $223.7 million decrease in loans and leases, offset partially by a $45.9 million increase in securities available-for-sale. The decrease in loans and leases was driven mostly by payoffs and paydowns of $5.8 billion and sales of $641.9 million, including settlement of the loans held for sale at December 31, 2017, offset partially by production of $3.3 billion and disbursements of $2.9 billion. The increase in securities available-for-sale was due mainly to purchases exceeding sales, principal paydowns, maturities, and other reductions.

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At September 30, 2018, we had total liabilities of $20.0 billion, including total deposits of $17.9 billion and borrowings of $1.5 billion, compared to $20.0 billion of total liabilities, including $18.9 billion of total deposits and $467.3 million of borrowings at December 31, 2017. The $23.2 million increase in total liabilities since year-end was due mainly to a $1.0 billion increase in borrowings, primarily short-term FHLB advances, offset partially by a $424.3 million decrease in core deposits, a $379.7 million decrease in non-core non-maturity deposits, and a $182.0 million decrease in time deposits. At September 30, 2018, core deposits totaled $15.5 billion, or 87% of total deposits, and time deposits totaled $1.9 billion, or 10% of total deposits.

At September 30, 2018, we had total stockholders' equity of $4.7 billion compared to $5.0 billion at December 31, 2017. The $235.9 million decrease in stockholders' equity since year-end was due mainly to $306.4 million of common stock repurchased under the Stock Repurchase Program, $214.1 million of cash dividends paid, and a $75.0 million decline in accumulated other comprehensive income, offset partially by $350.3 million in net earnings. Consolidated capital ratios remained strong with Tier 1 capital and total capital ratios of 10.18% and 13.03% at September 30, 2018.

Recent Events

El Dorado Savings Bank Merger Announcement

On September 11, 2018, PacWest entered into a definitive agreement and plan of merger (the “Agreement”) whereby PacWest will acquire El Dorado Savings Bank, F.S.B. (“El Dorado”) in a transaction valued at approximately $466.7 million.

El Dorado, headquartered in Placerville, California, is a federally chartered savings bank founded in 1958, with approximately $2.2 billion in assets and 35 branches located primarily in eight Northern California counties and two Northern Nevada counties. In connection with the transaction, El Dorado will be merged into the Bank.

The transaction, which was approved by the PacWest and El Dorado boards of directors, is expected to close in the first quarter of 2019 and is subject to customary closing conditions, including obtaining approval by bank regulatory authorities and El Dorado’s shareholders.

Stock Repurchase Program

Our Stock Repurchase Program was initially authorized by PacWest's Board of Directors in October 2016 pursuant to which the Company could, until December 31, 2017, purchase shares of its common stock for an aggregate purchase price not to exceed $400 million. In November 2017, PacWest's Board of Directors amended the Stock Repurchase Program to reduce the authorized purchase amount to $150 million and extend the maturity date to December 31, 2018. On February 14, 2018, PacWest's Board of Directors amended the Stock Repurchase Program to increase the authorized purchase amount to $350 million and extend the maturity date to February 28, 2019.

The amount and exact timing of any repurchases will depend upon market conditions and other factors. The Stock Repurchase Program may be suspended or discontinued at any time. During the third quarter of 2018, we repurchased 1,276,498 shares of common stock for a total amount of $64.6 million at an average price of $50.59. During the nine months endedSeptember 30, 2018, we repurchased 5,849,234 shares of common stock for a total amount of $306.4 million at an average price of $52.38. All shares repurchased under the Stock Repurchase Program were retired upon settlement. At September 30, 2018, the remaining amount that could be used to repurchase shares under the Stock Repurchase Program was $110.1 million.

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CUB Acquisition

On October 20, 2017, PacWest completed the acquisition of CUB in a transaction valued at $670.6 million. As part of the acquisition, CU Bank, a wholly-owned subsidiary of CUB, was merged with and into the Bank.

CU Bank was a commercial bank headquartered in Los Angeles, California with nine branches located in Los Angeles, Orange, Ventura and San Bernardino counties. We completed the acquisition to, among other things, enhance our Southern California community bank franchise by adding a $2.1 billion loan portfolio and $2.7 billion of core deposits.

We recorded the acquired assets and liabilities, both tangible and intangible, at their estimated fair values as of the acquisition date which increased total assets by $3.5 billion. The application of the acquisition method of accounting resulted in goodwill of $374.7 million.

Loan Sales and Loans Held for Sale

In the fourth quarter of 2017, we entered into an agreement to sell $1.5 billion of cash flow loans and exited our National Lending group origination operations related to general, technology, and healthcare cash flow loans. As of December 31, 2017, $1.0 billion of the loans sold had settled, while $481.1 million were classified as held for sale. In connection with the loan sale and transfer of loans to held for sale, we recognized $2.2 million in charge-offs during the fourth quarter of 2017 to record the loans at the lower of cost or fair value. The loans held for sale at December 31, 2017 settled in the first quarter of 2018 and we recorded a gain of $1.3 million.

Federal Tax Reform

The TCJA was signed into law on December 22, 2017 and represents the first major overhaul of the United States federal income tax system in more than 30 years. The TCJA reduced the federal corporate tax rate from 35% to 21% effective January 1, 2018. Other changes affecting us include immediate deductions for certain new investments instead of deductions for bonus depreciation expense over time, modification of the deduction for performance-based executive compensation and limiting the amount of FDIC insurance assessments that are deductible.

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Key Performance Indicators

Among other factors, our operating results generally depend on the following key performance indicators:

The Level of Net Interest Income

Net interest income is the excess of interest earned on our interest‑earning assets over the interest paid on our interest‑bearing liabilities. Net interest margin is net interest income (annualized if related to a quarterly period) expressed as a percentage of average interest‑earning assets. Tax equivalent net interest income is net interest income increased by an adjustment for tax-exempt interest on certain loans and municipal securities based on a 21% federal statutory tax rate for 2018 and a 35% federal statutory tax rate for prior periods. Tax equivalent net interest margin is calculated as tax equivalent net interest income divided by average interest-earning assets.

Net interest income is affected by changes in both interest rates and the volume of average interest‑earning assets and interest‑bearing liabilities. Our primary interest‑earning assets are loans and investment securities, and our primary interest‑bearing liabilities are deposits. Contributing to our high net interest margin is our high yield on loans and leases and competitive cost of deposits. While our deposit balances will fluctuate depending on deposit holders’ perceptions of alternative yields available in the market, we seek to minimize the impact of these variances by attracting a high percentage of noninterest‑bearing deposits.

Loan and Lease Growth

We actively seek new lending opportunities under an array of lending products. Our lending activities include real estate mortgage loans, real estate construction and land loans, commercial loans and leases, and a small amount of consumer lending. Our commercial real estate loans and real estate construction loans are secured by a range of property types. Our commercial loans are diverse and generally include various asset-secured loans, equipment-secured loans and leases, venture capital loans to support venture capital firms’ operations and the operations of entrepreneurial companies during the various phases of their early life cycles, secured business loans originated through our community banking branch network, and loans to security alarm monitoring companies. Our loan origination process emphasizes credit quality. We have a number of large credit relationships and individual commitments. Our commitment sizes vary by loan product. At September 30, 2018, our largest commitment was $155.0 million and we had six commitments each of $150.0 million. These commitments were for equity fund loans, lender finance loans, and commercial construction loans. We price loans to preserve our interest spread and maintain our net interest margin. Achieving net loan growth is subject to many factors, including maintaining strict credit standards, competition from other lenders, and borrowers that opt to prepay loans.

The Magnitude of Credit Losses

We emphasize credit quality in originating and monitoring our loans and leases, and we measure our success by the levels of our classified and nonperforming assets and net charge‑offs. We maintain an allowance for credit losses on loans and leases, which is the sum of our allowance for loan and lease losses and our reserve for unfunded loan commitments. Provisions for credit losses are charged to operations as and when needed for both on and off‑balance sheet credit exposure. Loans and leases which are deemed uncollectable are charged off and deducted from the allowance for loan and lease losses. Recoveries on loans and leases previously charged off are added to the allowance for loan and lease losses. The provision for credit losses on the loan and lease portfolio is based on our allowance methodology which considers various credit performance measures such as historical and current net charge‑offs, the levels and trends of classified loans and leases, the likelihood of loans defaulting based on the historical degree that similar loans defaulted and the resulting loss severity for these defaulted loans, and the overall level of outstanding loans and leases. For originated and acquired non‑impaired loans, a provision for credit losses may be recorded to reflect credit deterioration after the origination date or after the acquisition date, respectively.

We regularly review our loans and leases to determine whether there has been any deterioration in credit quality resulting from borrower operations or changes in collateral value or other factors which may affect collectability of our loans and leases. Changes in economic conditions, such as the rate of economic growth, the unemployment rate, rate of inflation, increases in the general level of interest rates, declines in real estate values, changes in commodity prices, and adverse conditions in borrowers’ businesses, could negatively impact our borrowers and cause us to adversely classify loans and leases. An increase in classified loans and leases generally results in increased provisions for credit losses and an increased allowance for credit losses. Any deterioration in the commercial real estate market may lead to increased provisions for credit losses because our loans are concentrated in commercial real estate loans.

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The Level of Noninterest Expense

Our noninterest expense includes fixed and controllable overhead, the major components of which are compensation, occupancy, data processing, and other professional services. It also includes costs that tend to vary based on the volume of activity, such as loan and lease production and the number and complexity of foreclosed assets. We measure success in controlling both fixed and variable costs through monitoring of the efficiency ratio. We calculate the efficiency ratio by dividing noninterest expense (less intangible asset amortization, net foreclosed assets expense (income), and acquisition, integration and reorganization costs) by net revenues (the sum of tax equivalent net interest income plus noninterest income, less gain (loss) on sale of securities and gain (loss) on sales of assets other than loans and leases).

The following table presents the calculation of our efficiency ratio for the periods indicated:

		Three Months Ended									Nine Months Ended
		September 30,			June 30,			September 30,			September 30,
Efficiency Ratio		2018			2018			2017			2018			2017
		(Dollars in thousands)
Noninterest expense		$	128,153		$	126,449		$	118,542		$	381,997		$	352,793
Less:	Intangible asset amortization	5,587			5,587			3,049			17,520			9,178
	Foreclosed assets (income) expense, net	(257		)	(61		)	2,191			(440		)	2,177
	Acquisition, integration and reorganization costs	800			—			1,450			800			3,650
Noninterest expense used for efficiency ratio		$	122,023		$	120,923		$	111,852		$	364,117		$	337,788
Net interest income (tax equivalent)		$	262,276		$	264,798		$	246,575		$	785,546		$	731,132
Noninterest income		36,912			39,638			31,382			115,109			101,778
Net revenues		299,188			304,436			277,957			900,655			832,910
Less:	Gain on sale of securities	826			253			1,236			7,390			2,788
Net revenues used for efficiency ratio		$	298,362		$	304,183		$	276,721		$	893,265		$	830,122
Efficiency ratio		40.9		%	39.8		%	40.4		%	40.8		%	40.7		%

Critical Accounting Policies and Estimates

Our accounting policies are fundamental to understanding management’s discussion and analysis of results of operations and financial condition. We identify critical policies and estimates as those that require management to make particularly difficult, subjective, and/or complex judgments about matters that are inherently uncertain and because of the likelihood that materially different amounts would be reported under different conditions or using different assumptions. These policies and estimates relate to the allowance for credit losses on loans and leases held for investment, accounting for business combinations, and the realization of deferred income tax assets and liabilities. For further information, refer to our Annual Report on Form 10‑K for the year ended December 31, 2017. The update below is for our critical accounting policy and estimate related to our allowance for loan and lease losses, the primary component of our allowance for credit losses on loans and leases held for investment.

Allowance for Loan and Lease Losses

The allowance for loan and lease losses (“ALLL”) represents management’s estimate of probable credit losses inherent in the loan portfolio as of the balance sheet date. Our methodology to estimate the ALLL has three basic elements that include specific reserves for individually evaluated impaired loans, a quantitative general allowance for all other loans (including individually evaluated loans determined not to be impaired), and qualitative adjustments based on other factors which may be internal or external to the Company.

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During the second quarter of 2018, we changed our methodology used to estimate the quantitative general allowance due to the growth and increased complexity of the loan portfolio.

The new ALLL methodology included three primary changes: the quantitative component now employs a probability of default/loss given default ("PD/LGD") methodology; the loan segmentation groups our loan portfolio into 21 loan segments with similar risk characteristics (as opposed to 34 loan segments used under the previous methodology); and the historical range of loan performance history, the look-back period, was lengthened by one year.

The new PD/LGD methodology estimates the likelihood of loans defaulting based on the historical degree that similar loans defaulted, and it estimates the degree of credit loss based on the historical average degree of loss experienced for these similar loans. The reduced number of loan segments provides greater statistical validity by having more default and loss histories within each segment for the quantitative general allowance estimation. The look-back period was extended to capture loan performance back to January 1, 2009, a change from January 1, 2010 under the historical loss migration methodology. Extending this look-back period includes more historical loan performance information. The loss emergence period was unchanged as we continue to use seven quarters.

The methodology to estimate specific reserves for individually evaluated impaired loans did not change. The methodology to derive qualitative adjustments based on other internal or external factors was updated to align with the new PD/LGD methodology being applied to estimate the quantitative general allowance for unimpaired loans. As a result, the composition of the ALLL changed as the quantitative component increased and the qualitative component decreased as the new quantitative methodology now encompasses more information, such as the longer look-back period, that previously required a qualitative adjustment as part of determining the total ALLL estimate. These changes in the ALLL methodology did not result in material changes to management's overall ALLL estimate.

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Non-GAAP Measurements

We use certain non‑GAAP financial measures to provide meaningful supplemental information regarding the Company’s operational performance and to enhance investors’ overall understanding of such financial performance. The methodology for determining these non-GAAP measures may differ among companies. We used the following non-GAAP measures in this Form 10-Q:

• Return on average tangible equity, tangible common equity ratio, and tangible book value per share: Given that the use of these measures is prevalent among banking regulators, investors and analysts, we disclose them in addition to the related GAAP measures of return on average equity, equity to assets ratio, and book value per share, respectively. The reconciliations of these non-GAAP measurements to the GAAP measurements are presented in the following tables for and as of the periods presented.

		Three Months Ended									Nine Months Ended
		September 30,			June 30,			September 30,			September 30,
Return on Average Tangible Equity		2018			2018			2017			2018			2017
		(Dollars in thousands)
Net earnings		$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Average stockholders' equity		$	4,748,819		$	4,832,480		$	4,592,489		$	4,826,944		$	4,547,472
Less:	Average intangible assets	2,614,055			2,619,351			2,202,922			2,619,624			2,205,927
Average tangible common equity		$	2,134,764		$	2,213,129		$	2,389,567		$	2,207,320		$	2,341,545
Return on average equity (1)		9.72		%	9.61		%	8.77		%	9.70		%	8.05		%
Return on average tangible equity (2)		21.61		%	20.98		%	16.85		%	21.22		%	15.63		%

___________________________________

(1) Annualized net earnings divided by average stockholders' equity.

(2) Annualized net earnings divided by average tangible common equity.

Tangible Common Equity Ratio/	September 30,			December 31,
Tangible Book Value Per Share	2018			2017
	(Dollars in thousands, except per share data)
Stockholders’ equity	$	4,741,685		$	4,977,598
Less: Intangible assets	2,610,776			2,628,296
Tangible common equity	$	2,130,909		$	2,349,302
Total assets	$	24,782,126		$	24,994,876
Less: Intangible assets	2,610,776			2,628,296
Tangible assets	$	22,171,350		$	22,366,580
Equity to assets ratio	19.13		%	19.91		%
Tangible common equity ratio (1)	9.61		%	10.50		%
Book value per share	$	38.46		$	38.65
Tangible book value per share (2)	$	17.28		$	18.24
Shares outstanding	123,283,450			128,782,878

_______________________________________

(1) Tangible common equity divided by tangible assets.

(2) Tangible common equity divided by shares outstanding.

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Results of Operations

Earnings Performance

The following table presents performance metrics for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Dollars in thousands, except per share data)
Earnings Summary:
Net interest income	$	260,317		$	262,332		$	241,690		$	779,149		$	716,615
Provision for credit losses	(11,500		)	(17,500		)	(15,119		)	(33,000		)	(51,346		)
Noninterest income	36,912			39,638			31,382			115,109			101,778
Noninterest expense	(128,153		)	(126,449		)	(118,542		)	(381,997		)	(352,793		)
Earnings before income taxes	157,576			158,021			139,411			479,261			414,254
Income tax expense	(41,289		)	(42,286		)	(37,945		)	(128,963		)	(140,473		)
Net earnings	$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Performance Measures:
Diluted earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26
Annualized return on:
Average assets	1.89		%	1.93		%	1.82		%	1.94		%	1.67		%
Average tangible equity (1)(2)	21.61		%	20.98		%	16.85		%	21.22		%	15.63		%
Net interest margin (tax equivalent)	4.99		%	5.18		%	5.08		%	5.09		%	5.15		%
Efficiency ratio	40.9		%	39.8		%	40.4		%	40.8		%	40.7		%

_____________________________

(1) Calculation reduces average stockholder's equity by average intangible assets.

(2) See "- Non-GAAP Measurements."

Third Quarter of 2018 Compared to Second Quarter of 2018

Net earnings for the third quarter of 2018 were $116.3 million, or $0.94 per diluted share, compared to net earnings for the second quarter of 2018 of $115.7 million, or $0.92 per diluted share. The $0.6 million increase in net earnings from the prior quarter was due primarily to a lower provision for credit losses, offset partially by lower net interest income and lower noninterest income. The provision for credit losses decreased by $6.0 million in the third quarter of 2018 compared to the second quarter of 2018 due mainly to a lower level of loans rated special mention and a decrease in the provision related to the reserve for unfunded loan commitments. Net interest income declined by $2.0 million in the third quarter of 2018 compared to the second quarter of 2018 due mostly to higher deposit costs and a lower yield on average loans and leases, offset partially by a higher balance of average loans and leases. Noninterest income decreased by $2.7 million in the third quarter of 2018 compared to the second quarter of 2018 due primarily to a $6.4 million decline in other income, offset partially by a $2.6 million increase in warrant income and a $0.9 million increase in dividends and gains on equity investments.

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Third Quarter of 2018 Compared to Third Quarter of 2017

Net earnings for the third quarter of 2018 were $116.3 million, or $0.94 per diluted share, compared to net earnings for the third quarter of 2017 of $101.5 million, or $0.84 per diluted share. The $14.8 million increase in net earnings was due mainly to higher net interest income of $18.6 million, higher noninterest income of $5.5 million, and a lower provision for credit losses of $3.6 million, offset partially by higher noninterest expense of $9.6 million. The increase in net interest income was due mostly to higher balances of average loans and leases and average investment securities and a higher yield on average loans and leases, offset partially by a lower yield on average investment securities and higher interest expense. The increase in noninterest income was due primarily to higher warrant income of $3.1 million and higher other commissions and fees of $2.5 million. The decrease in the provision for credit losses was due principally to the reduction in special mention loans during the third quarter of 2018, while special mention loans increased during the third quarter of 2017. The increase in noninterest expense was due mainly to higher compensation expense of $7.9 million and higher intangible asset amortization of $2.5 million attributable to the intangible assets added from the CUB acquisition.

Nine Months Ended September 30, 2018 Compared to Nine Months Ended September 30, 2017

Net earnings for the nine months endedSeptember 30, 2018 were $350.3 million, or $2.79 per diluted share, compared to net earnings for the nine months endedSeptember 30, 2017 of $273.8 million, or $2.26 per diluted share. The $76.5 million increase in net earnings was due primarily to higher net interest income of $62.5 million, a lower provision for credit losses of $18.3 million, higher noninterest income of $13.3 million, and lower income tax expense of $11.5 million, offset partially by higher noninterest expense of $29.2 million. The increase in net interest income was due mainly to higher balances of average loans and leases and average investment securities and a higher yield on average loans and leases, offset partially by a lower yield on average investment securities and higher interest expense. The decrease in the provision for credit losses was due primarily to lower general reserve provisions for the first nine months of 2018 attributable to a lower level of cash flow loans in the portfolio during 2018 due mostly to the exit of cash flow lending at the end of 2017. The increase in noninterest income was due mainly to a higher gain on sale of securities of $4.6 million, higher warrant income of $3.6 million, and higher other commissions and fees of $3.5 million. The decrease in income tax expense was due primarily to the TCJA which reduced our effective tax rate to 26.9% for the nine months endedSeptember 30, 2018 from 33.9% for the nine months endedSeptember 30, 2017. The increase in noninterest expense was due mostly to higher compensation expense of $18.7 million, higher intangible asset amortization of $8.3 million, attributable to the intangible assets added from the CUB acquisition, and higher other professional services expense of $4.2 million.

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Net Interest Income

The following tables summarize the distribution of average assets, liabilities and stockholders’ equity, as well as interest income and yields earned on average interest‑earning assets and interest expense and rates paid on average interest‑bearing liabilities, presented on a tax equivalent basis, for the periods indicated:

	Three Months Ended
	September 30, 2018						June 30, 2018						September 30, 2017
			Interest		Yields				Interest		Yields				Interest		Yields
	Average		Income/		and		Average		Income/		and		Average		Income/		and
	Balance		Expense		Rates		Balance		Expense		Rates		Balance		Expense		Rates
	(Dollars in thousands)
ASSETS:
Loans and leases (1)(2)	$	16,913,792	$	264,371	6.20	%	$	16,576,361	$	260,529	6.30	%	$	15,575,030	$	235,818	6.01	%
Investment securities (3)	3,844,201		29,711		3.07	%	3,803,590		29,967		3.16	%	3,510,956		29,495		3.33	%
Deposits in financial institutions	108,485		519		1.90	%	112,170		484		1.73	%	171,455		538		1.24	%
Total interest‑earning assets (4)	20,866,478		294,601		5.60	%	20,492,121		290,980		5.70	%	19,257,441		265,851		5.48	%
Other assets	3,491,293						3,507,516						2,880,433
Total assets	$	24,357,771					$	23,999,637					$	22,137,874
LIABILITIES AND
STOCKHOLDERS’ EQUITY:
Interest checking deposits	$	2,433,837	5,135		0.84	%	$	2,243,767	3,932		0.70	%	$	2,146,125	2,960		0.55	%
Money market deposits	5,270,297		10,689		0.80	%	5,013,119		8,072		0.65	%	4,914,803		6,307		0.51	%
Savings deposits	629,241		233		0.15	%	656,310		245		0.15	%	707,367		289		0.16	%
Time deposits	1,778,552		5,064		1.13	%	1,790,415		4,118		0.92	%	2,256,259		3,515		0.62	%
Total interest‑bearing deposits	10,111,927		21,121		0.83	%	9,703,611		16,367		0.68	%	10,024,554		13,071		0.52	%
Borrowings	720,449		3,814		2.10	%	549,665		2,649		1.93	%	61,071		188		1.22	%
Subordinated debentures	452,312		7,390		6.48	%	451,973		7,166		6.36	%	447,012		6,017		5.34	%
Total interest‑bearing liabilities	11,284,688		32,325		1.14	%	10,705,249		26,182		0.98	%	10,532,637		19,276		0.73	%
Noninterest‑bearing demand deposits	8,120,306						8,253,413						6,858,816
Other liabilities	203,958						208,495						153,932
Total liabilities	19,608,952						19,167,157						17,545,385
Stockholders’ equity	4,748,819						4,832,480						4,592,489
Total liabilities and
stockholders' equity	$	24,357,771					$	23,999,637					$	22,137,874
Net interest income (4)			$	262,276					$	264,798					$	246,575
Net interest rate spread (4)					4.46	%					4.72	%					4.75	%
Net interest margin (4)					4.99	%					5.18	%					5.08	%
Total deposits (5)	$	18,232,233	$	21,121	0.46	%	$	17,957,024	$	16,367	0.37	%	$	16,883,370	$	13,071	0.31	%
Funding sources (6)	$	19,404,994	$	32,325	0.66	%	$	18,958,662	$	26,182	0.55	%	$	17,391,453	$	19,276	0.44	%

_____________________

(1) Includes nonaccrual loans and leases and loan fees. Starting with the third quarter of 2017, includes tax-equivalent adjustments related to tax-exempt interest on loans.

(2) Includes discount accretion on acquired loans of $6.1 million, $8.7 million, and $5.5 million for the three months ended September 30, 2018, June 30, 2018, and September 30, 2017, respectively.

(3) Includes tax-equivalent adjustments of $1.5 million, $2.1 million, and $4.7 million for the three months ended September 30, 2018, June 30, 2018, and September 30, 2017, respectively, related to tax-exempt interest on municipal securities. The federal statutory tax rate utilized was 21% for the 2018 periods and 35% for the 2017 period.

(4) Tax equivalent.

(5) Total deposits is the sum of total interest-bearing deposits and noninterest-bearing demand deposits. The cost of total deposits is calculated as annualized interest expense on deposits divided by average total deposits.

(6) Funding sources is the sum of total interest-bearing liabilities and noninterest-bearing demand deposits. The cost of funding sources is calculated as annualized total interest expense divided by average funding sources.

57

	Nine Months Ended
	September 30, 2018						September 30, 2017
			Interest		Yields				Interest		Yields
	Average		Income/		and		Average		Income/		and
	Balance		Expense		Rates		Balance		Expense		Rates
	(Dollars in thousands)
ASSETS:
Loans and leases (1)(2)	$	16,724,942	$	776,160	6.20	%	$	15,457,683	$	694,614	6.01	%
Investment securities (3)	3,779,007		87,613		3.10	%	3,402,658		86,855		3.41	%
Deposits in financial institutions	123,622		1,555		1.68	%	123,023		967		1.05	%
Total interest‑earning assets (4)	20,627,571		865,328		5.61	%	18,983,364		782,436		5.51	%
Other assets	3,516,331						2,925,110
Total assets	$	24,143,902					$	21,908,474
LIABILITIES AND
STOCKHOLDERS’ EQUITY:
Interest checking deposits	$	2,330,310	12,117		0.70	%	$	1,789,435	5,824		0.44	%
Money market deposits	5,108,029		25,573		0.67	%	4,896,639		15,710		0.43	%
Savings deposits	656,703		736		0.15	%	709,080		883		0.17	%
Time deposits	1,830,444		12,880		0.94	%	2,289,771		9,236		0.54	%
Total interest‑bearing deposits	9,925,486		51,306		0.69	%	9,684,925		31,653		0.44	%
Borrowings	504,898		7,383		1.96	%	369,953		2,272		0.82	%
Subordinated debentures	455,277		21,093		6.19	%	444,117		17,379		5.23	%
Total interest‑bearing liabilities	10,885,661		79,782		0.98	%	10,498,995		51,304		0.65	%
Noninterest‑bearing demand deposits	8,227,576						6,701,135
Other liabilities	203,721						160,872
Total liabilities	19,316,958						17,361,002
Stockholders’ equity	4,826,944						4,547,472
Total liabilities and
stockholders' equity	$	24,143,902					$	21,908,474
Net interest income (4)			$	785,546					$	731,132
Net interest rate spread (4)					4.63	%					4.86	%
Net interest margin (4)					5.09	%					5.15	%
Total deposits (5)	$	18,153,062	$	51,306	0.38	%	$	16,386,060	$	31,653	0.26	%
Funding sources (6)	$	19,113,237	$	79,782	0.56	%	$	17,200,130	$	51,304	0.40	%

_____________________

(1) Includes nonaccrual loans and leases and loan fees. Starting with the third quarter of 2017, includes tax-equivalent adjustments related to tax-exempt interest on loans.

(2) Includes discount accretion on acquired loans of $22.4 million and $19.4 million for the nine months ended September 30, 2018 and 2017, respectively.

(3) Includes tax-equivalent adjustments of $5.4 million and $14.4 million for the nine months ended September 30, 2018 and 2017, respectively, related to tax-exempt income on municipal securities. The federal statutory tax rate utilized was 21% for the 2018 period and 35% for the 2017 period.

(4) Tax equivalent.

(5) Total deposits is the sum of total interest-bearing deposits and noninterest-bearing demand deposits. The cost of total deposits is calculated as annualized interest expense on deposits divided by average total deposits.

(6) Funding sources is the sum of total interest-bearing liabilities and noninterest-bearing demand deposits. The cost of funding sources is calculated as annualized total interest expense divided by average funding sources.

58

Third Quarter of 2018 Compared to Second Quarter of 2018

Net interest income decreased by $2.0 million to $260.3 million for the third quarter of 2018 compared to $262.3 million for the second quarter of 2018 due to interest expense growth exceeding interest income growth. Interest expense increased due mainly to higher deposit costs and one additional day in the third quarter. Interest income increased due primarily to a higher balance of average loans and leases and one additional day in the third quarter, offset partially by a lower yield on average loans and leases. The tax equivalent yield on average loans and leases was 6.20% for the third quarter of 2018 compared to 6.30% for the second quarter of 2018. The decrease in the yield on average loans and leases was due principally to lower discount accretion on acquired loans (14 basis points in the third quarter of 2018 compared to 21 basis points in the second quarter of 2018).

The tax equivalent NIM was 4.99% for the third quarter of 2018 compared to 5.18% for the second quarter of 2018. The decrease in the tax equivalent NIM was due mainly to higher deposit costs and a lower yield on average loans and leases resulting from lower discount accretion on acquired loans. The taxable equivalent adjustment for tax-exempt interest income on municipal securities contributed three basis points to the tax equivalent NIM for the third quarter of 2018 and four basis points for the second quarter of 2018.

The cost of average total deposits increased to 0.46% for the third quarter of 2018 from 0.37% for the second quarter of 2018 due to higher rates paid on deposits in conjunction with increased market interest rates.

Third Quarter of 2018 Compared to Third Quarter of 2017

Net interest income increased by $18.6 million to $260.3 million for the third quarter of 2018 compared to $241.7 million for the third quarter of 2017 due mainly to higher balances of average loans and leases and average investment securities and a higher yield on average loans and leases, offset partially by a lower yield on average investment securities and higher interest expense. The yield on average loans and leases was 6.20% for the third quarter of 2018 compared to 6.01% for the same quarter of 2017. The increase in the yield on average loans and leases was due mainly to repricing of variable-rate loans attributable to the three increases in market interest rates during the first nine months of 2018 and three increases in market interest rates during 2017.

The tax equivalent NIM was 4.99% for the third quarter of 2018 compared to 5.08% for the same quarter last year. The decrease in the tax equivalent NIM was due mostly to a higher cost of average interest-bearing liabilities, a lower yield on average investment securities, and a decrease of five basis points resulting from a smaller tax equivalent adjustment due to the lower statutory federal tax rate, offset partially by the increase in the yield on average loans and leases as described above. The taxable equivalent adjustment for tax-exempt interest income on municipal securities contributed three basis points to the tax equivalent NIM for the third quarter of 2018 and 10 basis points for the third quarter of 2017.

The cost of average total deposits increased to 0.46% for the third quarter of 2018 from 0.31% for the third quarter of 2017 due to higher rates paid on deposits from competitive pressure and increased market interest rates.

Nine Months Ended September 30, 2018 Compared to Nine Months Ended September 30, 2017

Net interest income increased by $62.5 million to $779.1 million for the nine months endedSeptember 30, 2018 compared to $716.6 million for the nine months endedSeptember 30, 2017 due mainly to higher balances of average loans and leases and average investment securities and a higher yield on average loans and leases, offset partially by a lower yield on average investment securities and higher interest expense. The yield on average loans and leases was 6.20% for the nine months endedSeptember 30, 2018 compared to 6.01% for the same period in 2017. The increase in the yield on average loans and leases was due mainly to repricing of variable-rate loans attributable to the three increases in market interest rates during the first nine months of 2018 and three increases in market interest rates during 2017.

59

The tax equivalent NIM for the nine months endedSeptember 30, 2018 was 5.09% compared to 5.15% for the same period last year. The decrease in the tax equivalent NIM was due mostly to a higher cost of average interest-bearing liabilities, a lower yield on average investment securities, and a decrease of six basis points resulting from a smaller tax equivalent adjustment due to the lower statutory federal tax rate, offset partially by the increase in the yield on average loans and leases as described above. The taxable equivalent adjustment for tax-exempt interest income on municipal securities contributed three basis points to the tax equivalent NIM for the nine months endedSeptember 30, 2018 and 10 basis points for the for the nine months endedSeptember 30, 2017.

The cost of average total deposits increased to 0.38% for the nine months endedSeptember 30, 2018 from 0.26% for the nine months endedSeptember 30, 2017 due to higher rates paid on deposits in conjunction with increased market interest rates.

Provision for Credit Losses

The following table sets forth the details of the provision for credit losses on loans and leases held for investment and information regarding credit quality metrics for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Dollars in thousands)
Provision For Credit Losses:
Addition to allowance for loan and lease losses	$	11,500		$	15,000		$	14,573		$	26,274		$	48,060
Addition to reserve for unfunded loan commitments	—			2,500			546			6,726			3,286
Total provision for credit losses	$	11,500		$	17,500		$	15,119		$	33,000		$	51,346
Credit Quality Metrics (1):
Net charge‑offs on loans and leases held for
investment (2)	$	1,719		$	17,136		$	1,063		$	23,810		$	40,199
Annualized net charge‑offs to average loans and leases	0.04		%	0.41		%	0.03		%	0.19		%	0.35		%
At period end:
Allowance for credit losses	$	177,281		$	167,500		$	173,579
Allowance for credit losses to loans and leases
held for investment	1.03		%	0.99		%	1.11		%
Allowance for credit losses to nonaccrual
loans and leases held for investment	156.9		%	147.3		%	110.1		%
Nonaccrual loans and leases held for investment	$	112,972		$	113,745		$	157,697
Performing TDRs held for investment	22,106			58,148			56,552
Total impaired loans and leases	$	135,078		$	171,893		$	214,249
Classified loans and leasesheld for investment	$	260,459		$	236,292		$	344,777

______________________

(1) Amounts and ratios related to 2018 periods are for total loans and leases held for investment, net of deferred fees. Amounts and ratios related to 2017 periods are for Non-PCI loans and leases held for investment, net of deferred fees.

(2) See "- Balance Sheet Analysis - Allowance for Credit Losses on Loans and Leases Held for Investment" for detail of charge-offs and recoveries by loan portfolio segment, class, and subclass for the periods presented.

60

Provisions for credit losses are charged to earnings for both on and off‑balance sheet credit exposures. The provision for credit losses on our loans and leases held for investment is based on our allowance methodology and is an expense that, in our judgment, is required to maintain an adequate allowance for credit losses.

The allowance for loan and lease losses has a general reserve component for loans and leases with no credit impairment and a specific reserve component for impaired loans and leases. Our allowance methodology for the general reserve component includes both quantitative and qualitative loss factors that are applied against the population of unimpaired loans and leases. The quantitative loss factors consider the likelihood of loans defaulting based on the historical degree that similar loans defaulted and the degree of credit losses based on the historical average degree of loss experienced for these similar loans and leases pooled both by loan or lease type and credit risk rating; loans with more adverse credit risk ratings have higher quantitative loss factors. The qualitative loss factors consider, among other things, current economic trends and forecasts, current collateral values and performance trends, and the loan portfolio's current composition and credit performance trends. As noted in " - Critical Accounting Policies and Estimates - Allowance for Loan and Lease Losses," we changed our ALLL methodology in the second quarter of 2018. See that section for details regarding this change.

We recorded a provision for credit losses of $11.5 million in the third quarter of 2018, $17.5 million in the second quarter of 2018, and $15.1 million in the third quarter of 2017. The provision for credit losses was $33.0 million for the nine months endedSeptember 30, 2018 compared to $51.3 million for the nine months endedSeptember 30, 2017.

The decrease in the provision for credit losses for the third quarter of 2018 compared to the second quarter of 2018 was due mainly to a lower level of special mention loans at September 30, 2018 compared to June 30, 2018 and a $2.5 million decrease in the provision related to the reserve for unfunded loan commitments. Loans rated special mention have a higher general reserve amount than loans rated pass.

The decrease in the provision for credit losses for the third quarter of 2018 compared to the third quarter of 2017 was due mostly to the reduction in special mention loans during the third quarter of 2018, while special mention loans increased during the third quarter of 2017.

The decrease in the provision for credit losses for the first nine months of 2018 compared to the same period last year was due primarily to lower general reserve provisions for the first nine months of 2018 attributable to a lower level of cash flow loans due mostly to the exit of cash flow lending at the end of 2017.

Certain circumstances may lead to increased provisions for credit losses in the future. Examples of such circumstances are an increased amount of classified and/or impaired loans and leases, net loan and lease and unfunded commitment growth, and changes in economic conditions. Changes in economic conditions include the rate of economic growth, the unemployment rate, the rate of inflation, increases in the general level of interest rates, declines in real estate values, and adverse conditions in borrowers’ businesses. See further discussion in “- Balance Sheet Analysis - Allowance for Credit Losses on Loans and Leases Held for Investment” contained herein.

61

Noninterest Income

The following table summarizes noninterest income by category for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,		June 30,		September 30,		September 30,
Noninterest Income	2018		2018		2017		2018		2017
	(In thousands)
Service charges on deposit accounts	$	3,979	$	4,265	$	3,465	$	12,418	$	10,733
Other commissions and fees	12,397		11,767		9,944		34,429		30,917
Leased equipment income	9,120		9,790		8,332		28,497		29,442
Gain on sale of loans and leases	—		106		2,848		4,675		4,209
Gain on sale of securities	826		253		1,236		7,390		2,788
Other income:
Dividends and gains on equity investments	2,895		1,992		1,845		5,138		4,777
Warrant income	3,818		1,225		731		5,291		1,701
Other	3,877		10,240		2,981		17,271		17,211
Total noninterest income	$	36,912	$	39,638	$	31,382	$	115,109	$	101,778

Third Quarter of 2018 Compared to Second Quarter of 2018

Noninterest income decreased by $2.7 million to $36.9 million for the third quarter of 2018 compared to $39.6 million for the second quarter of 2018 due mainly to decreases of $6.4 million in other income and $0.7 million in leased equipment income, offset partially by increases of $2.6 million in warrant income, $0.9 million in dividends and gains on equity investments, and $0.6 million in other commissions and fees. Other income and leased equipment income decreased in the third quarter due to lower gains on early lease terminations. Warrant income increased due to higher realized gains on exercised warrants resulting primarily from a $3.1 million gain on a warrant in a company that completed its IPO. Dividends and gains on equity investments increased due to higher realized gains on investments sold. The increase in other commissions and fees was attributable to higher loan-related fees.

Third Quarter of 2018 Compared to Third Quarter of 2017

Noninterest income increased by $5.5 million to $36.9 million for the third quarter of 2018 compared to $31.4 million for the third quarter of 2017 due mainly to increases of $3.1 million in warrant income, $2.5 million in higher other commissions and fees, $1.1 million in dividends and gains on equity investments, $0.9 million in other income, and $0.8 million in leased equipment income, offset partially by a $2.8 million decrease in gain on sale of loans and leases. Warrant income increased due mostly to a $3.1 million realized gain on an exercised warrant in a company that completed its IPO. Other commissions and fees increased due primarily to higher loan-related fees of $1.3 million, higher foreign exchange fees of $0.8 million, and higher credit card fee income of $0.3 million. Dividends and gains on equity investments increased due mostly to higher realized gains on investments sold. Other income increased due mainly to higher BOLI income. Leased equipment income increased due primarily to higher gains on early lease terminations. There was no gain on sale of loans and leases in the third quarter of 2018 compared to $2.8 million in the third quarter of 2017.

62

Nine Months Ended September 30, 2018 Compared to Nine Months Ended September 30, 2017

Noninterest income increased by $13.3 million to $115.1 million for the nine months endedSeptember 30, 2018 compared to $101.8 million for the nine months endedSeptember 30, 2017 due mainly to increases of $4.6 million in gain on sale of securities, $3.6 million in warrant income, $3.5 million in other commissions and fees, and $1.7 million in service charges on deposit accounts. The increase in gain on sale of securities was attributable to a net gain of $7.4 million on sales of $492.7 million of securities during the nine months endedSeptember 30, 2018 compared to a net gain of $2.8 million on sales of $182.7 million of securities during the nine months endedSeptember 30, 2017. The securities sold in 2018 include $299.9 million that were sold for a gain of $6.3 million in the first quarter of 2018 primarily for reinvestment in higher quality liquid assets, yield, and credit risk purposes. Warrant income increased due mostly to a third quarter of 2018 $3.1 million realized gain on an exercised warrant in a company that completed its IPO. Other commissions and fees increased due primarily to higher foreign exchange fees of $2.7 million and higher credit card fee income of $1.5 million. Service charges on deposit accounts increased due mainly to higher analysis charges as a result of the CUB acquisition.

Noninterest Expense

The following table summarizes noninterest expense by category for the periods indicated:

	Three Months Ended								Nine Months Ended
	September 30,			June 30,			September 30,		September 30,
Noninterest Expense	2018			2018			2017		2018			2017
	(In thousands)
Compensation	$	72,333		$	69,913		$	64,413	$	213,269		$	194,581
Occupancy	13,069			13,575			12,729		39,867			36,148
Data processing	6,740			6,896			6,459		20,295			19,811
Other professional services	6,058			5,257			4,213		15,754			11,567
Insurance and assessments	5,446			5,330			4,702		16,503			14,349
Intangible asset amortization	5,587			5,587			3,049		17,520			9,178
Leased equipment depreciation	5,001			5,237			4,862		15,613			15,719
Foreclosed assets (income) expense, net	(257		)	(61		)	2,191		(440		)	2,177
Acquisition, integration and reorganization costs	800			—			1,450		800			3,650
Loan expense	2,249			3,058			3,421		7,578			10,692
Other	11,127			11,657			11,053		35,238			34,921
Total noninterest expense	$	128,153		$	126,449		$	118,542	$	381,997		$	352,793

Third Quarter of 2018 Compared to Second Quarter of 2018

Noninterest expense increased by $1.7 million to $128.2 million for the third quarter of 2018 compared to $126.4 million for the second quarter of 2018 due mainly to increases of $2.4 million in compensation expense, $0.8 million in other professional services, and $0.8 million in acquisition, integration and reorganization costs, offset partially by decreases in most other expense categories. Compensation expense increased due mostly to higher stock compensation expense for our performance-based restricted stock units as we now expect to achieve a higher level of certain performance metrics, and higher commissions expense related to the increased warrant income. Other professional services increased due principally to higher legal and consulting expense. The increase in acquisition costs related to the recently announced pending acquisition of El Dorado.

63

Third Quarter of 2018 Compared to Third Quarter of 2017

Noninterest expense increased by $9.6 million to $128.2 million for the third quarter of 2018 compared to $118.5 million for the third quarter of 2017 due mainly to increases of $7.9 million in compensation expense, $2.5 million in intangible asset amortization, and $1.8 million in other professional services, offset partially by a decrease of $2.4 million in foreclosed assets expense. Compensation expensed increased due mostly to higher salary expense of $3.6 million, higher stock compensation expense of $1.7 million, higher bonus expense of $1.6 million, and higher commissions expense of $1.2 million. The increase in stock compensation expense related principally to performance-based restricted stock units for which the Company now expects to achieve a higher level of certain performance metrics. Intangible asset amortization increased due primarily to the intangible assets added from the CUB acquisition in October 2017. Other professional services increased due principally to higher consulting, legal, and internal audit expense. Foreclosed assets expense decreased due mainly to a $2.1 million write-down on foreclosed property taken in the third quarter of 2017 that did not repeat in the third quarter of 2018.

Nine Months Ended September 30, 2018 Compared to Nine Months Ended September 30, 2017

Noninterest expense increased by $29.2 million to $382.0 million for the nine months endedSeptember 30, 2018 compared to $352.8 million for the nine months endedSeptember 30, 2017 due mainly to increases of $18.7 million in compensation expense, $8.3 million in intangible asset amortization, $4.2 million in other professional services, and $3.7 million in occupancy expense, offset partially by decreases of $3.1 million in loan expense and $2.9 million in acquisition, integration and reorganization costs. Compensation expense increased due mostly to mostly to higher salary expense of $10.7 million, higher bonus expense of $4.3 million, higher stock compensation expense of $2.7 million, and higher commissions expense of $1.2 million. The increase in stock compensation expense related principally to performance-based restricted stock units for which the Company now expects to achieve a higher level of certain performance metrics. Intangible asset amortization increased due primarily to the intangible assets added from the CUB acquisition in October 2017. Other professional services increased due principally to higher consulting, legal, and internal audit expense. Occupancy expense increased due mainly to inclusion of the CUB operations since its acquisition. Loan expense decreased due principally to lower legal-related and other loan expenses. The acquisition, integration and reorganization costs for the nine months endedSeptember 30, 2018 related to the pending El Dorado acquisition, while the costs for the same period last year related to the CUB acquisition.

Income Taxes

The effective tax rate for the third quarter of 2018 was 26.2% compared to 26.8% for the second quarter of 2018 and 27.2% for the third quarter of 2017. The effective tax rate was 26.9% and 33.9% for the nine months endedSeptember 30, 2018 and 2017. The decrease in the effective tax rate for the nine months endedSeptember 30, 2018 compared to the same period in 2017 was due primarily to the enactment of the TCJA, which reduced the federal statutory corporate tax rate to 21% effective January 1, 2018 from 35% in 2017. The Company recorded the effects of the TCJA in its financial statements as of December 31, 2017, and as a result of the completion of the Company’s 2017 federal income tax return in the third quarter of 2018, the Company considers its accounting for the effects of the TCJA to be complete. However, the legislation remains subject to potential amendments, technical corrections and further guidance at both the federal and state levels. The Company's blended statutory tax rate for federal and state is 28.6% and the estimated effective tax rate for the full year 2018 is approximately 27%.

64

Balance Sheet Analysis

Securities Available-for-Sale

The following table presents the composition and durations of our securities available-for-sale as of the dates indicated:

	September 30, 2018					June 30, 2018					December 31, 2017
	Fair		% of		Duration	Fair		% of		Duration	Fair		% of		Duration
Security Type	Value		Total		(in years)	Value		Total		(in years)	Value		Total		(in years)
	(Dollars in thousands)
Residential MBS and CMOs:
Agency MBS	$	249,831	7	%	3.3	$	263,588	7	%	3.2	$	246,274	7	%	3.0
Agency CMOs	569,605		15	%	5.0	554,891		14	%	5.0	275,709		7	%	6.8
Private label CMOs	110,450		3	%	4.6	102,236		3	%	4.8	125,987		3	%	5.1
Municipal securities	1,271,583		33	%	7.3	1,412,092		37	%	7.3	1,680,068		45	%	7.3
Agency commercial MBS	1,077,005		28	%	5.1	1,097,216		28	%	5.2	1,163,969		31	%	5.4
U.S. Treasury securities	397,631		10	%	3.2	262,341		7	%	3.6	—		—	%	—
SBA securities	67,586		2	%	3.5	77,351		2	%	3.4	160,334		4	%	2.0
Asset-backed securities	58,452		2	%	2.1	69,781		2	%	2.2	88,710		2	%	3.0
Corporate debt securities	18,190		—	%	11.0	18,292		—	%	11.3	19,295		1	%	11.8
Collateralized loan obligations	—		—	%	—	—		—	%	—	7,015		—	%	0.3
Equity investments (1)	—		—	%	—	—		—	%	—	7,070		—	%	—
Total securities available-
for-sale	$	3,820,333	100	%	5.4	$	3,857,788	100	%	5.6	$	3,774,431	100	%	6.0

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

The following table shows the geographic composition of the majority of our municipal securities portfolio as of the date indicated:

	September 30, 2018
	Fair		% of
Municipal Securities by State	Value		Total
	(Dollars in thousands)
California	$	280,001	22	%
New York	140,528		11	%
Washington	130,530		10	%
Texas	64,728		5	%
Ohio	56,125		4	%
Oregon	52,478		4	%
Florida	49,945		4	%
Massachusetts	47,800		4	%
Utah	46,813		4	%
Iowa	46,550		4	%
Total of ten largest states	915,498		72	%
All other states	356,085		28	%
Total municipal securities	$	1,271,583	100	%

65

Loans and Leases Held for Investment

The following table presents the composition of our total loans and leases held for investment as of the dates indicated:

	September 30, 2018				June 30, 2018				December 31, 2017 (1)
			% of				% of				% of
	Amount		Total		Amount		Total		Amount		Total
	(Dollars in thousands)
Real estate mortgage:
Healthcare real estate	$	482,792	3	%	$	611,029	4	%	$	843,653	5	%
Hospitality	589,360		3	%	552,589		3	%	695,043		4	%
SBA program	550,535		3	%	541,911		3	%	551,606		3	%
Other commercial real estate	3,310,136		19	%	3,305,151		20	%	3,295,438		20	%
Total commercial real estate	4,932,823		28	%	5,010,680		30	%	5,385,740		32	%
Income producing residential	2,618,964		15	%	2,413,760		14	%	2,245,058		13	%
Other residential real estate	126,873		1	%	141,935		1	%	221,836		1	%
Total residential real estate	2,745,837		16	%	2,555,695		15	%	2,466,894		14	%
Total real estate mortgage	7,678,660		44	%	7,566,375		45	%	7,852,634		46	%
Real estate construction and land:
Commercial	854,346		5	%	831,462		5	%	769,075		5	%
Residential	1,146,611		7	%	1,042,564		6	%	822,154		5	%
Total real estate construction and land	2,000,957		12	%	1,874,026		11	%	1,591,229		10	%
Total real estate	9,679,617		56	%	9,440,401		56	%	9,443,863		56	%
Commercial:
Lender finance & timeshare	1,817,471		11	%	1,820,856		11	%	1,609,937		9	%
Equipment finance	682,994		4	%	663,365		4	%	656,995		4	%
Other asset-based	406,702		2	%	400,007		2	%	425,354		3	%
Premium finance	315,144		2	%	300,072		2	%	232,664		1	%
Total asset-based	3,222,311		19	%	3,184,300		19	%	2,924,950		17	%
Expansion stage	974,569		6	%	1,009,700		6	%	953,199		6	%
Equity fund loans	628,213		4	%	551,366		3	%	471,163		3	%
Early stage	293,012		2	%	291,875		2	%	443,370		3	%
Late stage	136,101		—	%	155,264		1	%	255,003		1	%
Total venture capital	2,031,895		12	%	2,008,205		12	%	2,122,735		13	%
Secured business loans	693,363		4	%	686,945		4	%	743,824		4	%
Security monitoring	606,639		4	%	576,823		3	%	573,066		3	%
Other lending	488,422		3	%	475,443		3	%	475,584		3	%
Cash flow	109,428		—	%	134,396		1	%	278,920		2	%
Total other commercial	1,897,852		11	%	1,873,607		11	%	2,071,394		12	%
Total commercial	7,152,058		42	%	7,066,112		42	%	7,119,079		42	%
Consumer	398,471		2	%	378,679		2	%	409,801		2	%
Total loans and leases held for investment,
net of deferred fees	$	17,230,146	100	%	$	16,885,192	100	%	$	16,972,743	100	%

_____________________________________

(1) Excludes loans held for sale carried at lower of cost or fair value.

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The following table presents the geographic composition of our real estate loans held for investment by the top 10 states and all other states combined (in the order presented for the current quarter-end) as of the dates indicated:

	September 30, 2018				December 31, 2017
			% of				% of
Real Estate Loans by State	Amount		Total		Amount		Total
	(Dollars in thousands)
California	$	5,457,244	57	%	$	5,206,633	55	%
New York	768,247		8	%	697,012		7	%
Florida	558,965		6	%	505,043		5	%
Texas	331,097		3	%	343,799		4	%
Arizona	253,381		3	%	263,621		3	%
Illinois	220,710		2	%	163,662		2	%
Oregon	216,492		2	%	152,849		2	%
Virginia	210,673		2	%	233,654		2	%
Washington	210,510		2	%	208,358		2	%
New Jersey	169,019		2	%	140,150		2	%
Total of 10 largest states	8,396,338		87	%	7,914,781		84	%
All other states	1,283,279		13	%	1,529,082		16	%
Total real estate loans held for investment	$	9,679,617	100	%	$	9,443,863	100	%

The following table presents a roll forward of the loan and lease portfolio held for investment for the periods indicated:

	Three Months Ended			Nine Months Ended
Loans and Leases Held for Investment Roll Forward(1)	September 30, 2018			September 30, 2018
	(Dollars in thousands)
Balance, beginning of period	$	16,885,192		$	16,972,743
Additions:
Production	1,315,572			3,317,049
Disbursements	966,668			2,917,984
Total production and disbursements	2,282,240			6,235,033
Reductions:
Payoffs	(1,133,233		)	(3,218,606		)
Paydowns	(795,243		)	(2,560,364		)
Total payoffs and paydowns	(1,928,476		)	(5,778,970		)
Sales	(3,326		)	(161,729		)
Transfers to foreclosed assets	(2,176		)	(3,235		)
Charge-offs	(3,308		)	(33,696		)
Total reductions	(1,937,286		)	(5,977,630		)
Balance, end of period	$	17,230,146		$	17,230,146
Weighted average rate on production (2)	5.17		%	5.16		%

_______________________________________

(1) Includes direct financing leases but excludes equipment leased to others under operating leases.

(2) The weighted average rate on production presents contractual rates on a tax equivalent basis and does not include amortized fees. Amortized fees added approximately 31 basis points to loan yields for the nine months ended September 30, 2018.

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Allowance for Credit Losses on Loans and Leases Held for Investment

The allowance for credit losses on loans and leases held for investment is the combination of the allowance for loan and lease losses and the reserve for unfunded loan commitments. The allowance for loan and lease losses is reported as a reduction of outstanding loan and lease balances and the reserve for unfunded loan commitments is included within "Accrued interest payable and other liabilities" on the condensed consolidated balance sheets. For loans and leases acquired and measured at fair value and deemed non-impaired on the acquisition date, our allowance methodology measures deterioration in credit quality or other inherent risks related to these acquired assets that may occur after the acquisition date.

The allowance for credit losses is maintained at a level deemed appropriate by management to adequately provide for known and inherent risks in the loan and lease portfolio and other extensions of credit at the balance sheet date. The allowance is based upon our review of the credit quality of the loan and lease portfolio, which includes loan and lease payment trends, borrowers' compliance with loan agreements, borrowers' current and budgeted financial performance, collateral valuation trends, and current economic factors and external conditions that may affect our borrowers' ability to make payments to us in accordance with contractual terms. Loans and leases that are deemed to be uncollectable are charged off and deducted from the allowance. The provision for loan and lease losses and recoveries on loans and leases previously charged off are added to the allowance.

The allowance for loan and lease losses has a general reserve component for unimpaired loans and leases and a specific reserve component for impaired loans and leases.

A loan or lease is considered impaired when it is probable that we will be unable to collect all amounts due according to the original contractual terms of the agreement. We assess our loans and leases for impairment on an ongoing basis using certain criteria such as payment performance, borrower reported financial results and budgets, and other external factors when appropriate. We measure impairment of a loan or lease based upon the fair value of the underlying collateral if the loan or lease is collateral-dependent or the present value of cash flows, discounted at the effective interest rate, if the loan or lease is not collateral-dependent. To the extent a loan or lease balance exceeds the estimated collectable value, a specific reserve or charge-off is recorded depending upon either the certainty of the estimate of loss or the fair value of the loan’s collateral if the loan is collateral-dependent. Impaired loans and leases with outstanding balances less than or equal to $250,000 may not be individually assessed for impairment but are assessed with reserves based on the average loss severity on historical impaired loans with similar risk characteristics.

Our allowance methodology for the general reserve component includes both quantitative and qualitative loss factors which are applied to our population of unimpaired loans and leases to estimate our general reserves. The quantitative loss factors consider the likelihood of loans defaulting based on the historical degree that similar loans defaulted and the degree of credit losses based on the historical average degree of loss experienced for these similar loans and leases pooled both by loan or lease type and credit risk rating; loans with more adverse credit risk ratings have higher quantitative loss factors. The qualitative loss factors consider, among other things, current economic trends and forecasts, current collateral values and performance trends, and the loan portfolio's current composition and credit performance trends. As noted in " - Critical Accounting Policies and Estimates - Allowance for Loan and Lease Losses," we changed our methodology for calculating the ALLL in the second quarter of 2018. See that section for details regarding this change.

The qualitative criteria we consider when establishing the loss factors include the following:

• current economic trends and forecasts;

• current collateral values, performance trends, and overall outlook in the markets where we lend;

• legal and regulatory matters that could impact our borrowers’ ability to repay our loans and leases;

• loan and lease portfolio composition and any loan concentrations;

• current lending policies and the effects of any new policies or policy amendments;

• loan and lease production volume and mix;

• loan and lease portfolio credit performance trends;

• results of our independent credit review; and

• changes in management related to credit administration functions.

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We estimate the reserve for unfunded loan commitments using the same loss factors as used for the allowance for loan and lease losses. The reserve for unfunded loan commitments is computed using expected future usage of the unfunded commitments based on historical usage of unfunded commitments for the various loan types.

The allowance for credit losses is directly correlated to the credit risk ratings of our loans. To ensure the accuracy of our credit risk ratings, an independent credit review function assesses the appropriateness of the credit risk ratings assigned to loans on a regular basis. The credit risk ratings assigned to every loan and lease are either “pass,” “special mention,” “substandard,” or “doubtful” and defined as follows:

• Pass: Loans and leases rated as "pass" are not adversely classified and collection and repayment in full are expected.

• Special Mention: Loans and leases rated as "special mention" have a potential weakness that requires management's attention. If not addressed, these potential weaknesses may result in further deterioration in the borrower's ability to repay the loan or lease.

• Substandard: Loans and leases rated as "substandard" have a well-defined weakness or weaknesses that jeopardize the collection of the debt. They are characterized by the possibility that we will sustain some loss if the weaknesses are not corrected.

• Doubtful: Loans and leases rated as "doubtful" have all the weaknesses of those rated as "substandard," with the additional trait that the weaknesses make collection or repayment in full highly questionable and improbable.

In addition, we may refer to the loans and leases with assigned credit risk ratings of "substandard" and "doubtful" together as "classified" loans and leases. For further information on classified loans and leases, see Note 6. Loans and Leases, of the Notes to Condensed Consolidated Financial Statements (Unaudited) contained in "Item 1. Condensed Consolidated Financial Statements (Unaudited)."

Management believes the allowance for credit losses is appropriate for the known and inherent risks in our loan and lease portfolio and the credit risk ratings and inherent loss rates currently assigned are appropriate. It is possible that others, given the same information, may at any point in time reach different conclusions that could result in a significant impact to the Company's financial statements. In addition, current credit risk ratings are subject to change as we continue to monitor our loans and leases. To the extent we experience, for example, increased levels of borrower loan defaults, borrowers’ noncompliance with our loan agreements, adverse changes in collateral values, or changes in economic and business conditions that adversely affect our borrowers, our classified loans and leases may increase. Higher levels of classified loans and leases generally result in increased provisions for credit losses and an increased allowance for credit losses. Although we have established an allowance for credit losses that we consider appropriate, there can be no assurance that the established allowance will be sufficient to absorb future losses.

The following table presents information regarding the allowance for credit losses on loans and leases held for investment as of the dates indicated:

	September 30,			June 30,			December 31,			September 30,
Allowance for Credit Losses Data(1)	2018			2018			2017			2017
	(Dollars in thousands)
Allowance for loan and lease losses	$	141,920		$	132,139		$	133,012		$	152,770
Reserve for unfunded loan commitments	35,361			35,361			28,635			20,809
Total allowance for credit losses	$	177,281		$	167,500		$	161,647		$	173,579
Allowance for credit losses to loans and leases held for investment	1.03		%	0.99		%	0.96		%	1.11		%
Allowance for credit losses to nonaccrual loans and leases held for investment	156.9		%	147.3		%	103.8		%	110.1		%

____________________________________________

(1) Amounts and ratios related to 2018 periods are for total loans and leases. Amounts and ratios related to 2017 periods are for Non-PCI loans and leases.

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The following table presents the changes in our allowance for credit losses on loans and leases held for investment for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
Allowance for Credit Losses Roll Forward(1)	2018			2018			2017			2018			2017
	(Dollars in thousands)
Balance, beginning of period (2)	$	167,500		$	167,136		$	159,142		$	168,091		$	161,278
Provision for credit losses:
Addition to allowance for loan and lease losses	11,500			15,000			14,954			26,274			49,214
Addition to reserve for unfunded loan commitments	—			2,500			546			6,726			3,286
Total provision for credit losses	11,500			17,500			15,500			33,000			52,500
Loans and leases charged off:
Real estate mortgage	(726		)	(4,747		)	(531		)	(8,071		)	(2,217		)
Real estate construction and land	—			—			—			—			—
Commercial	(2,373		)	(13,424		)	(4,984		)	(25,321		)	(46,965		)
Consumer	(209		)	(64		)	(413		)	(304		)	(625		)
Total loans and leases charged off	(3,308		)	(18,235		)	(5,928		)	(33,696		)	(49,807		)
Recoveries on loans charged off:
Real estate mortgage	223			119			36			1,999			286
Real estate construction and land	22			18			353			49			370
Commercial	1,303			912			4,447			7,702			8,848
Consumer	41			50			29			136			104
Total recoveries on loans charged off	1,589			1,099			4,865			9,886			9,608
Net charge-offs	(1,719		)	(17,136		)	(1,063		)	(23,810		)	(40,199		)
Balance, end of period	$	177,281		$	167,500		$	173,579		$	177,281		$	173,579
Annualized net charge-offs to average loans and leases	0.04		%	0.41		%	0.03		%	0.19		%	0.35		%

_________________________________________

(1) Amounts and ratio related to 2018 periods are for total loans and leases. Amounts and ratios related to 2017 periods are for Non-PCI loans and leases.

(2) The allowance for credit losses related to PCI loans of $6.4 million as of December 31, 2017 is reflected in the beginning balance for the nine months ended September 30, 2018.

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The following table presents charge-offs by loan portfolio segment, class, and subclass for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,		June 30,		September 30,		September 30,
Allowance for Credit Losses Charge-offs (1)	2018		2018		2017		2018		2017
	(In thousands)
Real estate mortgage:
Healthcare real estate	$	—	$	—	$	—	$	—	$	—
Hospitality	—		—		—		—		692
SBA program	468		111		163		2,594		1,117
Other commercial real estate	258		4,492		43		5,271		65
Total commercial real estate	726		4,603		206		7,865		1,874
Income producing residential	—		144		—		145		—
Other residential real estate	—		—		325		61		343
Total residential real estate	—		144		325		206		343
Total real estate mortgage	726		4,747		531		8,071		2,217
Real estate construction and land:
Commercial	—		—		—		—		—
Residential	—		—		—		—		—
Total real estate construction and land	—		—		—		—		—
Commercial:
Lender finance & timeshare	—		—		202		8		202
Equipment finance	—		2,934		—		2,934		19
Other asset-based	673		—		400		1,033		400
Premium finance	—		—		—		—		—
Total asset-based	673		2,934		602		3,975		621
Expansion stage	1,142		2,195		384		5,811		6,429
Early stage	—		3,888		69		3,721		10,781
Equity fund loans	—		—		—		—		—
Late stage	—		—		2,971		—		2,971
Total venture capital	1,142		6,083		3,424		9,532		20,181
Security monitoring	—		—		—		—		—
Secured business loans	71		88		112		624		610
Other lending	487		78		1		1,251		927
Cash flow	—		4,241		845		9,939		24,626
Total other commercial	558		4,407		958		11,814		26,163
Total commercial	2,373		13,424		4,984		25,321		46,965
Consumer	209		64		413		304		625
Total charge-offs	$	3,308	$	18,235	$	5,928	$	33,696	$	49,807

_______________________________________________

(1) Charge-offs related to 2018 periods are for total loans and leases. Charge-offs related to 2017 periods are for Non-PCI loans and leases.

Gross charge-offs were $3.3 million for the third quarter of 2018 and included $1.1 million for venture capital loans, $0.7 million for real estate mortgage loans, $0.7 million for asset-based loans, and $0.6 million for other commercial loans. This compares to gross charge-offs of $18.2 million for the second quarter of 2018 which included $6.1 million for venture capital loans, $4.7 million for real estate mortgage loans, $4.4 million for other commercial loans, and $2.9 million for asset-based loans.

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The following table presents recoveries by portfolio segment, class, and subclass for the periods indicated:

	Three Months Ended								Nine Months Ended
	September 30,		June 30,			September 30,			September 30,
Allowance for Credit Losses Recoveries(1)	2018		2018			2017			2018		2017
	(In thousands)
Real estate mortgage:
Healthcare real estate	$	—	$	—		$	—		$	—	$	—
Hospitality	—		—			—			—		—
SBA program	18		19			32			294		63
Other commercial real estate	198		—			—			360		—
Total commercial real estate	216		19			32			654		63
Income producing residential	—		—			—			1,208		—
Other residential real estate	7		100			4			137		223
Total residential real estate	7		100			4			1,345		223
Total real estate mortgage	223		119			36			1,999		286
Real estate construction and land:
Commercial	22		11			14			42		31
Residential	—		7			339			7		339
Total real estate construction and land	22		18			353			49		370
Commercial:
Lender finance & timeshare	1		1			—			2		—
Equipment finance	—		—			1,392			90		3,377
Other asset-based	68		69			—			187		—
Premium finance	—		—			—			—		—
Total asset-based	69		70			1,392			279		3,377
Expansion stage	704		(9		)	(95		)	5,115		398
Early stage	281		65			2,692			563		3,656
Equity fund loans	—		—			—			—		—
Late stage	—		—			—			—		—
Total venture capital	985		56			2,597			5,678		4,054
Security monitoring	—		—			—			—		—
Secured business loans	160		241			146			553		705
Other lending	80		545			312			1,183		712
Cash flow	9		—			—			9		—
Total other commercial	249		786			458			1,745		1,417
Total commercial	1,303		912			4,447			7,702		8,848
Consumer	41		50			29			136		104
Total recoveries	$	1,589	$	1,099		$	4,865		$	9,886	$	9,608

___________________________________________

(1) Recoveries related to 2018 periods are for total loans and leases. Recoveries related to 2017 periods are for Non-PCI loans and leases.

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Deposits

The following table presents the balance of each major category of deposits as of the dates indicated:

	September 30, 2018				June 30, 2018				December 31, 2017
			% of				% of				% of
Deposit Category	Amount		Total		Amount		Total		Amount		Total
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	7,834,480	44	%	$	8,126,153	45	%	$	8,508,044	45	%
Interest checking deposits	2,277,537		13	%	2,184,785		12	%	2,226,885		12	%
Money market deposits	4,782,724		27	%	4,631,658		26	%	4,511,730		24	%
Savings deposits	618,001		3	%	643,642		4	%	690,353		4	%
Total core deposits	15,512,742		87	%	15,586,238		87	%	15,937,012		85	%
Non-core non-maturity deposits	483,528		3	%	607,388		3	%	863,202		4	%
Total non-maturity deposits	15,996,270		90	%	16,193,626		90	%	16,800,214		89	%
Time deposits $250,000 and under	1,509,214		8	%	1,394,117		8	%	1,709,980		9	%
Time deposits over $250,000	374,059		2	%	341,449		2	%	355,342		2	%
Total time deposits	1,883,273		10	%	1,735,566		10	%	2,065,322		11	%
Total deposits	$	17,879,543	100	%	$	17,929,192	100	%	$	18,865,536	100	%

Total deposits decreased by $49.6 million during the third quarter to $17.9 billion, due mainly to a decrease in non-core non-maturity deposits of $123.9 million and a decrease in core deposits of $73.5 million, offset partially by an increase in time deposits of $147.7 million. At September 30, 2018, core deposits totaled $15.5 billion, or 87% of total deposits, including $7.8 billion of noninterest-bearing demand deposits, or 44% of total deposits.

The following table summarizes the maturities of time deposits as of the date indicated:

	Time Deposits
	$250,000		Over
September 30, 2018	and Under		$250,000		Total
	(In thousands)
Maturities:
Due in three months or less	$	519,676	$	112,448	$	632,124
Due in over three months through six months	350,276		160,295		510,571
Due in over six months through twelve months	519,277		59,246		578,523
Due in over 12 months through 24 months	94,205		39,034		133,239
Due in over 24 months	25,780		3,036		28,816
Total	$	1,509,214	$	374,059	$	1,883,273

Client Investment Funds

In addition to deposit products, we also offer select clients non-depository cash investment options through S1AM, our registered investment adviser subsidiary, and third-party money market sweep products. S1AM provides customized investment advisory and asset management solutions. At September 30, 2018, total off-balance sheet client investment funds were $2.0 billion, of which $1.5 billion was managed by S1AM. At December 31, 2017, total off-balance sheet client investment funds were $2.1 billion, of which $1.7 billion was managed by S1AM.

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Nonperforming Assets, Performing TDRs, and Classified Loans and Leases

The following table presents nonperforming assets and performing TDRs information as of the dates indicated:

	September 30,			June 30,			December 31,			September 30,
	2018			2018			2017			2017
	(Dollars in thousands)
Nonaccrual loans and leases held for investment (1)(2)	$	112,972		$	113,745		157,545			$	159,458
Accruing loans contractually past due 90 days or more	—			—			—			—
Foreclosed assets, net	4,407			2,231			1,329			11,630
Total nonperforming assets	$	117,379		$	115,976		$	158,874		$	171,088
Performing TDRs held for investment (3)	$	22,106		$	58,148		$	56,838		$	56,552
Nonaccrual loans and leases held for investment to
loans and leases held for investment (1)	0.66		%	0.67		%	0.93		%	1.02		%
Nonperforming assets to loans and leases held for investment
and foreclosed assets, net	0.68		%	0.69		%	0.94		%	1.09		%

_______________________________________

(1) Amounts and ratios are for total loans and leases held for investment, net of deferred fees.

(2) Excludes loans held for sale carried at lower of cost or fair value at December 31, 2017.

(3) Amounts and ratios related to 2018 periods are for total loans and leases held for investment, net of deferred fees. Amounts and ratios related to 2017 periods are for Non-PCI loans and leases held for investment, net of deferred fees.

Nonperforming assets include nonaccrual loans and leases held for investment and foreclosed assets and totaled $117.4 million at September 30, 2018 compared to $116.0 million at June 30, 2018. The ratio of nonperforming assets to loans and leases held for investment and foreclosed assets decreased to 0.68% at September 30, 2018 from 0.69% at June 30, 2018.

Nonaccrual Loans and Leases Held for Investment

During the third quarter of 2018, nonaccrual loan and leases held for investment decreased by $0.8 million to $113.0 million at September 30, 2018 due mainly to $20.6 million in principal payments and other reductions, which included the full repayment of a $10.5 million nonaccrual residential real estate construction loan, offset partially by nonaccrual additions of $19.8 million, which included an $11.9 million venture capital loan. The decrease in nonaccrual loans and leases by loan category was attributable primarily to a $10.5 million decrease in nonaccrual residential real estate construction and land loans and a $3.4 million decrease in nonaccrual commercial real estate mortgage loans, offset partially by a $7.6 million increase in nonaccrual venture capital loans and a $4.9 million increase in nonaccrual asset-based loans. As of September 30, 2018, the Company's ten largest loan relationships on nonaccrual status had an aggregate carrying value of $83.2 million and represented 73.7% of total nonaccrual loans and leases.

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The following table presents our nonaccrual loans and leases held for investment and accruing loans and leases past due between 30 and 89 days by portfolio segment and class as of the dates indicated:

	Nonaccrual Loans and Leases								Accruing and
	September 30, 2018				June 30, 2018				30 - 89 Days Past Due
			% of				% of		September 30,		June 30,
			Loan				Loan		2018		2018
	Amount		Category		Amount		Category		Amount		Amount
	(Dollars in thousands)
Real estate mortgage:
Commercial	$	29,723	0.6	%	$	33,105	0.7	%	$	824	$	2,620
Residential	3,259		0.1	%	3,527		0.1	%	5,436		2,983
Total real estate mortgage	32,982		0.4	%	36,632		0.5	%	6,260		5,603
Real estate construction and land:
Commercial	—		—	%	—		—	%	—		—
Residential	—		—	%	10,450		1.0	%	8,498		5,969
Total real estate construction and land	—		—	%	10,450		0.6	%	8,498		5,969
Commercial:
Asset-based	34,619		1.1	%	29,677		0.9	%	—		—
Venture capital	35,520		1.7	%	27,940		1.4	%	1,028		—
Other commercial	9,579		0.5	%	8,782		0.5	%	222		230
Total commercial	79,718		1.1	%	66,399		0.9	%	1,250		230
Consumer	272		0.1	%	264		0.1	%	605		75
Total held for investment	$	112,972	0.7	%	$	113,745	0.7	%	$	16,613	$	11,877

Foreclosed Assets

The following table presents foreclosed assets (primarily OREO) by property type as of the dates indicated:

	September 30,		June 30,		December 31,		September 30,
Property Type	2018		2018		2017		2017
	(In thousands)
Construction and land development	$	219	$	219	$	219	$	9,319
Multi-family	1,059		1,059		—		—
Single family residence	953		953		1,019		1,668
Commercial real estate	2,176		—		64		65
Total OREO, net	4,407		2,231		1,302		11,052
Other foreclosed assets	—		—		27		578
Total foreclosed assets	$	4,407	$	2,231	$	1,329	$	11,630

During the third quarter of 2018, foreclosed assets increased by $2.2 million to $4.4 million at September 30, 2018 due to additions of $2.2 million.

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Performing TDRs Held for Investment

The following table presents our performing TDRs held for investment by portfolio segment as of the dates indicated:

	September 30, 2018			June 30, 2018			December 31, 2017
			Number			Number			Number
			of			of			of
Performing TDRs(1)	Amount		Loans	Amount		Loans	Amount		Loans
	(Dollars in thousands)
Real estate mortgage	$	15,296	29	$	50,500	32	$	47,560	23
Real estate construction and land	5,533		2	5,549		2	5,690		2
Commercial	1,166		8	1,982		9	3,488		11
Consumer	111		3	117		3	100		2
Total performing TDRs held for investment	$	22,106	42	$	58,148	46	$	56,838	38

______________________________________

(1) Amounts related to 2018 periods are for total loans and leases held for investment, net of deferred fees. Amounts related to 2017 are for Non-PCI loans and leases held for investment, net of deferred fees.

During the third quarter of 2018, performing TDRs held for investment decreased by $36.0 million to $22.1 million at September 30, 2018 attributable to $6.6 million in payoffs and other reductions and the removal of a $29.4 million commercial real estate mortgage loan from TDR status due to the loan being restructured at current market terms with no concessions granted and the borrower not experiencing financial difficulties. The majority of the number of performing TDRs were on accrual status prior to the restructurings and have remained on accrual status after the restructurings due to the borrowers making payments before and after the restructurings.

Classified and Special Mention Loans and Leases Held for Investment

The following table presents the credit risk ratings of our loans and leases held for investment as of the dates indicated:

	September 30,			June 30,			December 31,			September 30,
Loan and Lease Credit Risk Ratings(1)	2018			2018			2017 (2)			2017
	(Dollars in thousands)
Pass	$	16,609,629		$	16,142,052		$	16,334,134		$	14,900,080
Special mention	360,058			506,848			302,168			383,166
Classified	260,459			236,292			278,405			344,777
Total loans and leases held for investment,
net of deferred fees	$	17,230,146		$	16,885,192		$	16,914,707		$	15,628,023
Classified loans and leases held for investment
to loans and leases held for investment	1.51		%	1.40		%	1.65		%	2.21		%

______________________________________

(1) Amounts and ratios related to 2018 periods are for total loans and leases held for investment, net of deferred fees. Amounts and ratios related to 2017 periods are for Non-PCI loans and leases held for investment, net of deferred fees.

(2) Excludes loans held for sale carried at lower of cost or fair value.

During the third quarter of 2018, classified loans and leases held for investment increased by $24.2 million to $260.5 million at September 30, 2018 due mainly to a $34.4 million security monitoring cash flow loan being downgraded to classified status, offset partially by the full repayment of a $10.5 million classified nonaccrual residential real estate construction loan. The increase in classified loans and leases by loan category was attributable to a $40.7 million increase classified other commercial loans and a $7.5 million increase in classified asset-based loans, offset partially by a $10.5 million decrease in classified residential real estate construction and land loans, a $7.0 million decrease in classified venture capital loans, and a $6.5 million decrease in classified commercial real estate mortgage loans.

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During the third quarter of 2018, special mention loans and leases decreased by $146.8 million to $360.1 million at September 30, 2018 due principally to a $47.8 million special mention commercial real estate loan being upgraded to pass status, the full repayment of a $33.4 million special mention healthcare real estate loan, and net pay downs, payoffs, and migrations out of the special mention category. The decrease in special mention loans and leases by loan category was attributable to an $102.4 million decrease in special mention commercial real estate mortgage loans, a $34.2 million decrease in special mention venture capital loans, and a $19.5 million decrease in special mention other commercial loans, offset partially by a $9.9 million increase in special mention residential real estate mortgage loans.

Regulatory Matters

Capital

Bank regulatory agencies measure capital adequacy through standardized risk-based capital guidelines that compare different levels of capital (as defined by such guidelines) to risk-weighted assets and off-balance sheet obligations. At September 30, 2018, banks considered to be “well capitalized” must maintain a minimum Tier 1 leverage ratio of 5.00%, a minimum common equity Tier 1 risk-based capital ratio of 6.50%, a minimum Tier 1 risk-based capital ratio of 8.00%, and a minimum total risk-based capital ratio of 10.00%. Regulatory capital requirements limit the amount of deferred tax assets that may be included when determining the amount of regulatory capital. Deferred tax asset amounts in excess of the calculated limit are disallowed from regulatory capital. At September 30, 2018, such disallowed amounts were $669,000 for the Company and $45,000 for the Bank. No assurance can be given that the regulatory capital deferred tax asset limitation will not increase in the future or that the Company or Bank will not have increased deferred tax assets that are disallowed.

Basel III requires all banking organizations to maintain a capital conservation buffer above the minimum risk-based capital requirements to avoid certain limitations on capital distributions, stock repurchases and discretionary bonus payments to executive officers. The capital conservation buffer is exclusively comprised of common equity tier 1 capital, and it applies to each of the three risk-based capital ratios but not to the leverage ratio. At September 30, 2018, the Company and Bank were in compliance with the capital conservation buffer requirement. The capital conservation buffer will increase by 0.625% each year through 2019, at which point, the common equity tier 1, tier 1 and total capital ratio minimums inclusive of the capital conservation buffer will be 7.0%, 8.5% and 10.5%, respectively.

The following table presents a comparison of our actual capital ratios to the minimum required ratios and well capitalized ratios as of the dates indicated:

		Minimum Required
			Plus Capital		Plus Capital
		For Capital	Conservation	For Well	Conservation
		Adequacy	Buffer	Capitalized	Buffer Fully
	Actual	Purposes	Phase-In (1)	Requirement	Phased-In
September 30, 2018
PacWest Bancorp Consolidated
Tier 1 capital (to average assets)	10.10%	4.00%	4.000%	N/A	4.00%
CET1 capital (to risk weighted assets)	10.18%	4.50%	6.375%	N/A	7.00%
Tier 1 capital (to risk weighted assets)	10.18%	6.00%	7.875%	N/A	8.50%
Total capital (to risk weighted assets)	13.03%	8.00%	9.875%	N/A	10.50%
Pacific Western Bank
Tier 1 capital (to average assets)	10.78%	4.00%	4.000%	5.00%	4.00%
CET1 capital (to risk weighted assets)	10.87%	4.50%	6.375%	6.50%	7.00%
Tier 1 capital (to risk weighted assets)	10.87%	6.00%	7.875%	8.00%	8.50%
Total capital (to risk weighted assets)	11.69%	8.00%	9.875%	10.00%	10.50%

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		Minimum Required
			Plus Capital		Plus Capital
		For Capital	Conservation	For Well	Conservation
		Adequacy	Buffer	Capitalized	Buffer Fully
	Actual	Purposes	Phase-In (1)	Requirement	Phased-In
December 31, 2017
PacWest Bancorp Consolidated
Tier 1 capital (to average assets)	10.66%	4.00%	4.000%	N/A	4.00%
CET1 capital (to risk weighted assets)	10.91%	4.50%	5.750%	N/A	7.00%
Tier 1 capital (to risk weighted assets)	10.91%	6.00%	7.250%	N/A	8.50%
Total capital (to risk weighted assets)	13.75%	8.00%	9.250%	N/A	10.50%
Pacific Western Bank
Tier 1 capital (to average assets)	11.75%	4.00%	4.000%	5.00%	4.00%
CET1 capital (to risk weighted assets)	11.91%	4.50%	5.750%	6.50%	7.00%
Tier 1 capital (to risk weighted assets)	11.91%	6.00%	7.250%	8.00%	8.50%
Total capital (to risk weighted assets)	12.69%	8.00%	9.250%	10.00%	10.50%

_______________________________________

(1) Ratios for September 30, 2018 reflect the minimum required plus capital conservation buffer phase-in for 2018; ratios for December 31, 2017 reflect the minimum required plus capital conservation buffer phase-in for 2017. The capital conservation buffer increases by 0.625% each year through 2019.

Subordinated Debentures

We issued or assumed through mergers subordinated debentures to trusts that were established by us or entities we previously acquired, which, in turn, issued trust preferred securities. The carrying value of subordinated debentures totaled $452.9 million at September 30, 2018. At September 30, 2018, none of the trust preferred securities were included in the Company's Tier I capital under the phase-out limitations of Basel III, and $439.4 million were included in Tier II capital.

During the first quarter of 2018, we redeemed $12.4 million of subordinated debentures assumed in connection with the CUB acquisition.

Dividends on Common Stock and Interest on Subordinated Debentures

As a bank holding company, PacWest is required to notify the FRB prior to declaring and paying a dividend to stockholders during any period in which quarterly and/or cumulative twelve-month net earnings are insufficient to fund the dividend amount, among other requirements. Interest payments made by us on subordinated debentures are considered dividend payments under FRB regulations.

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Liquidity

Liquidity Management

The goals of our liquidity management are to ensure the ability of the Company to meet its financial commitments when contractually due and to respond to other demands for funds such as the ability to meet the cash flow requirements of customers who may be either depositors wanting to withdraw funds or borrowers who have unfunded commitments. We have an Executive Management Asset/Liability Management Committee ("Executive ALM Committee") that is comprised of members of senior management and is responsible for managing commitments to meet the needs of customers while achieving our financial objectives. Our Executive ALM Committee meets regularly to review funding capacities, current and forecasted loan demand, and investment opportunities.

We manage our liquidity by maintaining pools of liquid assets on-balance sheet, consisting of cash and due from banks, interest-earning deposits in other financial institutions, and unpledged securities available-for-sale, which we refer to as our primary liquidity. We also maintain available borrowing capacity under secured borrowing lines with the FHLB and the FRBSF, which we refer to as our secondary liquidity.

As a member of the FHLB, the Bank had secured borrowing capacity with the FHLB as of September 30, 2018 of $3.6 billion, collateralized by a blanket lien on $5.2 billion of certain qualifying loans. The Bank also had secured borrowing capacity with the FRBSF of $2.1 billion as of September 30, 2018 collateralized by liens on $2.8 billion of qualifying loans.

In addition to its secured lines of credit, the Bank also maintains unsecured lines of credit for the purpose of borrowing overnight funds, subject to availability, of $143.0 million with the FHLB and $125.0 million with correspondent banks. As of September 30, 2018, there was a $143.0 million balance outstanding related to the FHLB unsecured line of credit. The Bank is a member of the AFX, through which it may either borrow or lend funds on an overnight or short-term basis with a group of pre-approved commercial banks. The availability of funds changes daily. As of September 30, 2018, the Bank had $235.0 million of borrowings outstanding through the AFX.

The following tables provide a summary of the Bank’s primary and secondary liquidity levels at the dates indicated:

	September 30,			June 30,			December 31,
Primary Liquidity - On-Balance Sheet	2018			2018			2017
	(Dollars in thousands)
Cash and due from banks	$	196,502		$	245,998		$	233,215
Interest-earning deposits in financial institutions	185,284			205,567			165,222
Securities available-for-sale	3,820,333			3,857,788			3,774,431
Less: pledged securities	(427,778		)	(433,160		)	(449,187		)
Total primary liquidity	$	3,774,341		$	3,876,193		$	3,723,681
Ratio of primary liquidity to total deposits	21.1		%	21.6		%	19.7		%

Secondary Liquidity - Off-Balance Sheet	September 30,			June 30,			December 31,
Available Secured Borrowing Capacity	2018			2018			2017
	(In thousands)
Secured borrowing capacity with the FHLB	$	3,587,256		$	3,504,393		$	3,789,949
Less: secured advances outstanding	(1,135,000		)	(945,000		)	(332,000		)
Net secured borrowing capacity with the FHLB	2,452,256			2,559,393			3,457,949
Secured borrowing capacity with the FRBSF	2,073,375			1,253,347			1,766,188
Total secondary liquidity	$	4,525,631		$	3,812,740		$	5,224,137

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During the three months ended September 30, 2018, the Company's primary liquidity decreased by $101.9 million due primarily to a $49.5 million decrease in cash and due from banks, a $37.5 million decrease in securities available-for-sale, and a $20.3 million decrease in interest-earning deposits in financial institutions. The Company's secondary liquidity increased by $712.9 million during the third quarter of 2018 due to an $820.0 million increase in the borrowing capacity on the secured credit line with the FRBSF and an $82.9 million increase in the borrowing capacity on the secured borrowing line with the FHLB, offset partially by a $190.0 million increase in the amount borrowed from the secured borrowing line with the FHLB. The increase in the borrowing capacity with the FRBSF in the third quarter was due primarily to an increase in loan collateral resulting from pledging construction loans.

In addition to our primary liquidity, we generate liquidity from cash flows from our loan and securities portfolios and from our large base of core customer deposits, defined as noninterest-bearing demand, interest checking, savings, and non-brokered money market accounts. At September 30, 2018, core deposits totaled $15.5 billion and represented 87% of the Company's total deposits. These core deposits are normally less volatile, often with customer relationships tied to other products offered by the Bank promoting long-standing relationships and stable funding sources. See "- Balance Sheet Analysis - Deposits" for additional information and detail of our core deposits.

Our deposit balances may decrease if interest rates increase significantly or if corporate customers withdraw funds from the Bank. In order to address the Bank’s liquidity risk as deposit balances may fluctuate, the Bank maintains adequate levels of available off-balance sheet liquidity.

We use brokered deposits, the availability of which is uncertain and subject to competitive market forces and regulation, for liquidity management purposes. At September 30, 2018, brokered deposits totaled $1.1 billion, consisting of $615.8 million of brokered time deposits, $455.6 million of non-maturity brokered accounts, and $5.0 million of other brokered deposits. At December 31, 2017, brokered deposits totaled $1.6 billion, consisting of $732.2 million of brokered time deposits, $835.6 million of non-maturity brokered accounts, and $7.5 million of other brokered deposits.

Our liquidity policy includes guidelines for On-Balance Sheet Liquidity (a measurement of primary liquidity to total deposits plus borrowings), Coverage and Crisis Coverage Ratios (measurements of liquid assets to expected short-term liquidity required for the loan and deposit portfolios under normal and stressed conditions), Loan to Funding Ratio (measurement of gross loans net of fees divided by deposits plus borrowings), Wholesale Funding Ratio (measurement of wholesale funding divided by interest-earning assets), and other guidelines developed for measuring and maintaining liquidity. As of September 30, 2018, we were in compliance with all of our established liquidity guidelines.

Holding Company Liquidity

PacWest acts a source of financial strength for the Bank which can also include being a source of liquidity. The primary sources of liquidity for the holding company include dividends from the Bank, intercompany tax payments from the Bank, and PacWest's ability to raise capital, issue subordinated debt, and secure outside borrowings. Our ability to obtain funds for the payment of dividends to our stockholders, the repurchase of shares of common stock, and other cash requirements is largely dependent upon the Bank’s earnings. The Bank is subject to restrictions under certain federal and state laws and regulations that limit its ability to transfer funds to the holding company through intercompany loans, advances, or cash dividends.

Dividends paid by California state-chartered banks are regulated by the FDIC and the DBO under their general supervisory authority as it relates to a bank’s capital requirements. A state bank may declare a dividend without the approval of the DBO and the FDIC as long as the total dividends declared in a calendar year do not exceed either the retained earnings or the total of net profits for three previous fiscal years less any dividends paid during such period. During the three and nine months ended September 30, 2018, PacWest received $155.0 million and $604.0 million in dividends from the Bank. Since the Bank had an accumulated deficit of $685.3 million at September 30, 2018, for the foreseeable future, any dividends from the Bank to the holding company will continue to require DBO and FDIC approval.

At September 30, 2018, PacWest had $234.0 million in cash and due from banks, of which substantially all is on deposit at the Bank. We believe this amount of cash, along with anticipated dividends from the Bank, will be sufficient to fund the holding company’s cash flow needs over the next 12 months, including any stock repurchases pursuant to the Company's Stock Repurchase Program, which terminates on February 28, 2019. See "- Recent Events - Stock Repurchase Program" for additional information.

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Contractual Obligations

The following table summarizes the known contractual obligations of the Company as of the date indicated:

	September 30, 2018
			Due After		Due After
	Due		One Year		Three Years		Due
	Within		Through		Through		After
	One Year		Three Years		Five Years		Five Years		Total
	(In thousands)
Time deposits (1)	$	1,721,218	$	147,845	$	14,178	$	32	$	1,883,273
Short-term borrowings	1,513,000		—		—		—		1,513,000
Long-term debt obligations (1)	135		31		—		541,697		541,863
Contractual interest (2)	10,642		2,394		373		2		13,411
Operating lease obligations	33,053		56,859		37,357		27,728		154,997
Other contractual obligations	43,313		66,549		13,769		35,346		158,977
Total	$	3,321,361	$	273,678	$	65,677	$	604,805	$	4,265,521

_______________________________________

(1) Excludes purchase accounting fair value adjustments.

(2) Excludes interest on subordinated debentures as these instruments are variable rate.

Long-term debt obligations include subordinated debentures. Debt obligations are also discussed in Note 9. Borrowings and Subordinated Debentures, in the Notes to Condensed Consolidated Financial Statements (Unaudited) contained in “Item 1. Condensed Consolidated Financial Statements (Unaudited).” Operating lease obligations are discussed in the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2017. The other contractual obligations relate to our minimum liability associated with our data and item processing contract with a third-party provider, commitments to contribute capital to investments in low income housing project partnerships and private equity funds, and commitments under deferred compensation arrangements.

We believe that we will be able to meet our contractual obligations as they come due through the maintenance of adequate liquidity levels. We expect to maintain adequate liquidity levels through profitability, loan and lease payoffs, securities repayments and maturities, and continued deposit gathering activities. We also have in place various borrowing mechanisms for both short-term and long-term liquidity needs.

Off-Balance Sheet Arrangements

Our obligations also include off-balance sheet arrangements consisting of loan commitments, of which only a portion is expected to be funded. At September 30, 2018, our loan commitments, including standby letters of credit, totaled $7.4 billion. The commitments, a portion of which result in funded loans, increase our profitability through net interest income when drawn. We manage our overall liquidity taking into consideration funded and unfunded commitments as a percentage of our liquidity sources. Our liquidity sources, as described in "- Liquidity - Liquidity Management," have been and are expected to be sufficient to meet the cash requirements of our lending activities. For further information on loan commitments, see Note 10. Commitments and Contingencies, of the Notes to Condensed Consolidated Financial Statements (Unaudited) contained in "Item 1. Condensed Consolidated Financial Statements (Unaudited)."

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

This analysis should be read in conjunction with text under the caption "Quantitative and Qualitative Disclosures About Market Risk" in our Annual Report on Form 10-K for the year ended December 31, 2017, which text is incorporated herein by reference. Our analysis of market risk and market-sensitive financial information contains forward-looking statements and is subject to the disclosure at the beginning of Item 2 regarding such forward-looking information.

Market Risk - Foreign Currency Exchange

We enter into foreign exchange contracts with our clients and counterparty banks primarily for the purpose of offsetting or hedging clients' foreign currency exposures arising out of commercial transactions, and we enter into cross currency swaps to hedge exposures to loans and debt instruments denominated in foreign currencies. We have experienced and will continue to experience fluctuations in our net earnings as a result of transaction gains or losses related to revaluing certain asset and liability balances that are denominated in currencies other than the U.S. Dollar, and the derivatives that hedge those exposures. As of September 30, 2018, the U.S. Dollar notional amounts of loans receivable and subordinated debentures payable denominated in foreign currencies were $48.7 million and $29.9 million, and the U.S. Dollar notional amounts of derivatives outstanding to hedge these foreign currency exposures were $50.3 million and $29.2 million. We recognized a foreign currency translation net loss of $0.1 million for the nine months ended September 30, 2018 and a foreign currency translation net gain of $0.4 million for the nine months endedSeptember 30, 2017.

Asset/Liability Management and Interest Rate Sensitivity

Interest Rate Risk

We measure our IRR position on at least a quarterly basis using two methods: (i) NII simulation analysis; and (ii) MVE modeling. The Executive ALM Committee and the Board Asset/Liability Management Committee review the results of these analyses quarterly. If hypothetical changes to interest rates cause changes to our simulated net present value of equity and/or net interest income outside our pre‑established limits, we may adjust our asset and liability mix in an effort to bring our interest rate risk exposure within our established limits.

We evaluated the results of our NII simulation model and MVE model prepared as of September 30, 2018, the results of which are presented below. Our NII simulation indicates that our balance sheet is asset-sensitive, while our MVE model indicates that our balance sheet had a slightly liability-sensitive profile. An asset-sensitive profile would suggest that a sudden sustained increase in rates would result in an increase in our estimated NII and MVE, while a liability-sensitive profile would suggest that these amounts would decrease.

Net Interest Income Simulation

We used a NII simulation model to measure the estimated changes in NII that would result over the next 12 months from immediate and sustained changes in interest rates as of September 30, 2018. This model is an interest rate risk management tool and the results are not necessarily an indication of our future net interest income. This model has inherent limitations and these results are based on a given set of rate changes and assumptions at one point in time. We have assumed no growth in either our total interest‑sensitive assets or liabilities over the next 12 months, therefore the results reflect an interest rate shock to a static balance sheet.

This analysis calculates the difference between NII forecasted using both increasing and decreasing interest rate scenarios using the forward yield curve at September 30, 2018. In order to arrive at the base case, we extend our balance sheet at September 30, 2018 one year and reprice any assets and liabilities that would contractually reprice or mature during that period using the products’ pricing as of September 30, 2018. Based on such repricing, we calculate an estimated NII and NIM for each rate scenario.

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The NII simulation model is dependent upon numerous assumptions. For example, the substantial majority of our loans are variable rate, which are assumed to reprice in accordance with their contractual terms. Some loans and investment securities include the opportunity of prepayment (embedded options) and the simulation model uses prepayment assumptions to estimate these prepayments and reinvest these proceeds at current simulated yields. Our interest-bearing deposits reprice at our discretion and are assumed to reprice at a rate less than the change in market rates. In the third quarter of 2018, our cost of average total deposits increased by nine basis points, while the average fed funds target rate increased by 21 basis points, resulting in a deposit beta of 45%. This is an increase from our deposit beta of 22% during the second quarter of 2018. We expect the deposit beta to be equal to or slightly higher in the fourth quarter than it was in the third quarter. The IRR model deposit beta assumptions are being updated for recent historical experience and will likely be higher than the current assumptions, which will result in reduced asset sensitivity. The effects of certain balance sheet attributes, such as fixed‑rate loans, variable‑rate loans that have reached their floors, and the volume of noninterest‑bearing deposits as a percentage of earning assets, impact our assumptions and consequently the results of our NII simulation model. Changes that could vary significantly from our assumptions include loan and deposit growth or contraction, loan and deposit pricing, changes in the mix of earning assets or funding sources, and future asset/liability management decisions, all of which may have significant effects on our net interest income.

The following table presents forecasted net interest income and net interest margin for the next 12 months using the static balance sheet and forward yield curve as the base scenario, with immediate and sustained parallel upward and downward movements in interest rates of 100, 200 and 300 basis points as of the date indicated:

	Forecasted			Forecasted	Forecasted
	Net Interest		Percentage	Net Interest	Net Interest
	Income		Change	Margin	Margin Change
September 30, 2018	(Tax Equivalent)		From Base	(Tax Equivalent)	From Base
	(Dollars in millions)
Interest Rate Scenario:
Up 300 basis points	$	1,131.2	10.3%	5.26%	0.49%
Up 200 basis points	$	1,097.2	7.0%	5.10%	0.33%
Up 100 basis points	$	1,061.8	3.5%	4.94%	0.17%
BASE CASE	$	1,025.4	—	4.77%	—
Down 100 basis points	$	985.3	(3.9)%	4.58%	(0.19)%
Down 200 basis points	$	944.1	(7.9)%	4.39%	(0.38)%
Down 300 basis points	$	924.0	(9.9)%	4.30%	(0.47)%

Total base case year 1 tax equivalent NII was $1.025 billion at September 30, 2018 compared to $1.019 billion at June 30, 2018. The $6.6 million increase in year 1 tax equivalent NII was attributable to higher yields on assets, offset partially by the growth in interest-bearing deposits and borrowings required to fund asset growth during the third quarter of 2018.

In addition to parallel interest rate shock scenarios, we also model various alternative rate vectors that are viewed as more likely to occur in a typical monetary policy tightening cycle. The most favorable alternate rate vector that we model is the “Bear Flattener” scenario, when short-term rates increase faster than long-term rates, and the least favorable alternate rate vector that we model is the “Bull Steepener,” when short-term rates fall faster than long-term rates. In the “Bear Flattener” scenario, Year 1 tax equivalent NII increases by 1.26%, and in the “Bull Steepener” scenario, Year 1 tax equivalent NII decreases by 3.20%.

Of the $17.3 billion of total loans in the portfolio, $11.0 billion have variable interest rate terms (excluding hybrid loans discussed below). At September 30, 2018, $10.8 billion of these variable-rate loans have a loan rate higher than their floor rate, which allows them to reprice at their next reprice date upon a change in their index. Approximately 53% of the total variable-rate loans have a LIBOR index rate. Of the $184 million of loans with rates below their floor rates at September 30, 2018, $161 million (87.3%) will rise above their floor rates with a 100 basis point increase in market rates.

Additionally, approximately $2.9 billion of variable-rate hybrid loans do not immediately reprice because the loans contain an initial fixed-rate period before they become variable. The cumulative amounts of hybrid loans that would switch from being fixed-rate to variable-rate because the initial fixed-rate term would expire were approximately $203 million, $499 million, and $875 million in the next one, two, and three years.

83

Market Value of Equity

We measure the impact of market interest rate changes on the net present value of estimated cash flows from our assets, liabilities, and off‑balance sheet items, defined as the market value of equity, using our MVE model. This simulation model assesses the changes in the market value of our interest‑sensitive financial instruments that would occur in response to an instantaneous and sustained increase or decrease in market interest rates of 100, 200, and 300 basis points. This analysis assigns significant value to our noninterest-bearing deposit balances. The projections include various assumptions regarding cash flows and interest rates and are by their nature forward‑looking and inherently uncertain.

The MVE model is an interest rate risk management tool and the results are not necessarily an indication of our actual future results. Actual results may vary significantly from the results suggested by the market value of equity table. Loan prepayments and deposit attrition, changes in the mix of our earning assets or funding sources, and future asset/liability management decisions, among others, may vary significantly from our assumptions. The base case is determined by applying various current market discount rates to the estimated cash flows from the different types of assets, liabilities, and off‑balance sheet items existing at September 30, 2018.

The following table shows the projected change in the market value of equity for the set of rate scenarios presented as of the date indicated:

										Ratio of
	Projected		Dollar			Percentage		Percentage		Projected
	Market Value		Change			Change		of Total		Market Value
September 30, 2018	of Equity		From Base			From Base		Assets		to Book Value
	(Dollars in millions)
Interest Rate Scenario:
Up 300 basis points	$	6,033.4	$	(45.5	)	(0.7	)%	24.3	%	127.2	%
Up 200 basis points	$	6,054.7	$	(24.2	)	(0.4	)%	24.4	%	127.7	%
Up 100 basis points	$	6,069.6	$	(9.3	)	(0.2	)%	24.5	%	128.0	%
BASE CASE	$	6,078.9	$	—		—	%	24.5	%	128.2	%
Down 100 basis points	$	6,073.5	$	(5.4	)	(0.1	)%	24.5	%	128.1	%
Down 200 basis points	$	6,063.7	$	(15.2	)	(0.3	)%	24.5	%	127.9	%
Down 300 basis points	$	5,982.0	$	(96.9	)	(1.6	)%	24.1	%	126.2	%

Total base case projected market value of equity was $6.1 billion at September 30, 2018 compared to $6.0 billion at June 30, 2018. The projected market value of equity increased by $73 million, while our overall MVE sensitivity profile has remained relatively unchanged. The increase in base case market value of equity was due primarily to: (1) a $106 million increase in the mark-to-market adjustment for loans and leases resulting from lower credit spreads used in the loan value calculation, and (2) a $2 million decrease in the mark-to-market adjustment for total deposits due to the modest shift in the mix of total deposits as noninterest-bearing deposits decreased to 44% of total deposits at September 30, 2018 from 45% at June 30, 2018, offset partially by (3) a $36 million decrease in the book value of stockholders' equity due mainly to the combination of $74 million in dividends, $65 million in stock repurchases under the Stock Repurchase Program, a $22 million decline in accumulated other comprehensive income, and $116 million in net earnings.

ITEM 4. CONTROLS AND PROCEDURES

As of the end of the period covered by this report, an evaluation was carried out by the Company's management, with the participation of the Chief Executive Officer and the Chief Financial Officer, of the effectiveness of the Company's disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934). Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this report, these disclosure controls and procedures were effective.

There have been no changes in the Company's internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934) during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

84

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The information set forth in Note 10. Commitments and Contingencies in the Notes to Condensed Consolidated Financial Statements (Unaudited) is incorporated herein by reference.

In addition, in the ordinary course of our business, we are party to various legal actions, which we believe are incidental to the operation of our business. The outcome of such legal actions and the timing of ultimate resolution are inherently difficult to predict. In the opinion of management, based upon information currently available to us, any resulting liability, in addition to amounts already accrued, and taking into consideration insurance which may be applicable, would not have a material adverse effect on the Company’s financial statements or operations.

ITEM 1A. RISK FACTORS

For information regarding factors that could affect the Company's results of operations, financial condition and liquidity, see the riskfactors disclosed in the "Risk Factors" section of our Annual Report on Form 10-K for the year ended December 31, 2017. See also "Forward-Looking Information" disclosed in Part I, Item 2 of this quarterly report on Form 10-Q.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The following table presents stock purchases made during the third quarter of 2018:

				Total Number of	Maximum Dollar
				Shares Purchased	Value of Shares
				as Part of	That May Yet
		Average		Publicly	Be Purchased
	Total Number of	Price Paid		Announced	Under the
Purchase Dates	Shares Purchased (1)	Per Share		Program (2)	Program (2)
					(In thousands)
July 1 - July 31, 2018	642,012	$	50.14	642,012	$	142,515
August 1 - August 31, 2018	634,486	$	51.05	634,486	$	110,126
September 1 - September 30, 2018	4,199	$	50.47	—	$	110,126
Total	1,280,697	$	50.59	1,276,498

__________________________

(1) Includes shares repurchased pursuant to net settlement by employees and directors in satisfaction of income tax withholding obligations incurred through the vesting of Company stock awards, and shares repurchased pursuant to the Company's publicly announced Stock Repurchase Program, described in (2) below.

(2) Our Stock Repurchase Program was initially authorized by PacWest's Board of Directors in October 2016 pursuant to which the Company could, until December 31, 2017, purchase shares of its common stock for an aggregate purchase price not to exceed $400 million. On November 15, 2017 PacWest's Board of Directors amended the Stock Repurchase Program to reduce the authorized purchase amount to $150 million and extend the maturity date to December 31, 2018. On February 14, 2018, PacWest's Board of Directors amended the Stock Repurchase Program to increase the authorized purchase amount to $350 million and extend the maturity date to February 28, 2019. All shares repurchased under the Stock Repurchase Program were retired upon settlement.

85

ITEM 6. INDEX TO EXHIBITS

Exhibit Number	Description
2.4	Agreement and Plan of Merger dated April 5, 2017 between PacWest Bancorp and CU Bancorp (Exhibit 2.1 to Form 8-K filed on April 6, 2017 and incorporated herein by reference).
3.1	Certificate of Incorporation, as amended, of PacWest Bancorp, a Delaware corporation, dated April 22, 2008 (Exhibit 3.1 to Form 8-K filed on May 14, 2008 and incorporated herein by this reference).
3.2	Certificate of Amendment of Certificate of Incorporation of PacWest Bancorp, a Delaware Corporation, dated May 14, 2010 (Exhibit 3.1 to Form 8-K filed on May 14, 2010 and incorporated herein by this reference).
3.5	Amended and Restated Bylaws of PacWest Bancorp, a Delaware corporation, dated November 5, 2014 (Exhibit 3.5 to Form 10-Q filed on November 10, 2014 and incorporated herein by this reference).
10.1	PacWest Bancorp 2003 Stock Incentive Plan, as amended and restated, dated May 16, 2016 (Exhibit 10.1 to Form 8-K filed on May 18, 2016 and incorporated herein by this reference).
10.2	Form of Stock Award Agreement pursuant to the Company's 2003 Stock Incentive Plan, as amended and restated (Exhibit 10.2 to Form 10-Q filed on November 7, 2016 and incorporated herein by this reference).
10.3	Form of Stock Unit Award Agreement pursuant to the Company's 2003 Stock Incentive Plan, as amended and restated (Exhibit 10.3 to Form 10-Q filed on November 7, 2016 and incorporated herein by this reference).
10.4	PacWest Bancorp 2017 Stock Incentive Plan, as amended, dated May 15, 2017 (Exhibit 10.1 to Form S-8 filed on May 15, 2017 and incorporated herein by this reference).
10.5	Form of Stock Unit Award Agreement and Grant Notice pursuant to the Company's 2017 Stock Incentive Plan, as amended (Exhibit 10.2 to Form 8-K filed on May 18, 2017 and incorporated herein by reference).
10.6	Form of Stock Award Agreement and Grant Notice pursuant to the Company's 2017 Stock Incentive Plan, as amended (Exhibit 10.3 to Form 8-K filed on May 18, 2017 and incorporated herein by reference).
31.1	Section 302 Certification of Chief Executive Officer (Filed herewith).
31.2	Section 302 Certification of Chief Financial Officer (Filed herewith).
32.1	Section 906 Certification of Chief Executive Officer (Filed herewith).
32.2	Section 906 Certification of Chief Financial Officer (Filed herewith).
101	Interactive data files pursuant to Rule 405 of Regulation S-T: (i) the Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017, (ii) the Condensed Consolidated Statements of Earnings for the three months ended September 30, 2018, June 30, 2018, and September 30, 2017, and nine months ended September 30, 2018 and 2017, (iii) the Condensed Consolidated Statements of Comprehensive Income for the three months ended September 30, 2018, March 31, 2018, and September 30, 2017, and nine months ended September 30, 2018 and 2017, (iv) the Condensed Consolidated Statements of Changes in Stockholders' Equity for the three and nine months ended September 30, 2018 and 2017, (v) the Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and 2017, and (vi) the Notes to Condensed Consolidated Financial Statements (Filed herewith).

86

Signatures

Pursuant to the requirements of Section 13 or 15(d) 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.

		PACWEST BANCORP
Date:	November 7, 2018	/s/ Bart R. Olson
		Bart R. Olson
		Executive Vice President and Chief Accounting Officer

87

EX-31.1

Exhibit 31.1

Certification

Pursuant to Section 302 of the

Sarbanes-Oxley Act of 2002

I, Matthew P. Wagner, certify that:

1. I have reviewed this report on Form 10-Q for the quarterly period ended September 30, 2018 of PacWest Bancorp;

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

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

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

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

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

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

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

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

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

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

Date:	November 7, 2018	/s/ Matthew P. Wagner
		Matthew P. Wagner Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification

Pursuant to Section 302 of the

Sarbanes-Oxley Act of 2002

I, Patrick J. Rusnak, certify that:

1. I have reviewed this report on Form 10-Q for the quarterly period ended September 30, 2018 of PacWest Bancorp;

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

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

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

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

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

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

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

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

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

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

Date:	November 7, 2018	/s/ Patrick J. Rusnak
		Patrick J. Rusnak Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted

Pursuant to Section 906 of the

Sarbanes-Oxley Act of 2002

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350), the undersigned officer of PacWest Bancorp (the “Company”) hereby certifies that the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	November 7, 2018	/s/ Matthew P. Wagner
		Matthew P. Wagner Chief Executive Officer

The foregoing certification is being furnished solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350) and is not being filed as part of the Report or as a separate disclosure document.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted

Pursuant to Section 906 of the

Sarbanes-Oxley Act of 2002

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350), the undersigned officer of PacWest Bancorp (the “Company”) hereby certifies that the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	November 7, 2018	/s/ Patrick J. Rusnak
		Patrick J. Rusnak Executive Vice President and Chief Financial Officer

The foregoing certification is being furnished solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350) and is not being filed as part of the Report or as a separate disclosure document.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	PACWEST BANCORP
Entity Central Index Key	0001102112
Document Period End Date	Sep. 30, 2018
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		121,770,415

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS:
Cash and due from banks	$ 196,502	$ 233,215
Interest-earning deposits in financial institutions	185,284	165,222
Total cash, cash equivalents, and restricted cash	381,786	398,437
Securities available-for-sale, at fair value	3,820,333	3,774,431
Federal Home Loan Bank stock, at cost	31,077	20,790
Total investment securities	3,851,410	3,795,221
Loans held for sale, at lower of cost or fair value	0	481,100
Gross loans and leases held for investment	17,295,589	17,032,221
Deferred fees, net	(65,443)	(59,478)
Allowance for loan and lease losses	(141,920)	(139,456)
Total loans and leases held for investment, net	17,088,226	16,833,287
Equipment leased to others under operating leases	275,707	284,631
Premises and equipment, net	34,012	31,852
Foreclosed assets, net	4,407	1,329
Deferred tax asset, net	41,280	0
Goodwill	2,548,670	2,548,670
Core deposit and customer relationship intangibles, net	62,106	79,626
Other assets	494,522	540,723
Total assets	24,782,126	24,994,876
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits	7,834,480	8,508,044
Interest-bearing deposits	10,045,063	10,357,492
Total deposits	17,879,543	18,865,536
Borrowings	1,513,166	467,342
Subordinated debentures	452,944	462,437
Accrued interest payable and other liabilities	194,788	221,963
Total liabilities	20,040,441	20,017,278
Commitments and contingencies
Preferred stock ($0.01 par value; 5,000,000 shares authorized; none issued and outstanding)	0	0
Common stock ($0.01 par value, 200,000,000 shares authorized at September 30, 2018 and December 31, 2017; 125,132,237 and 130,491,108 shares issued, respectively, including 1,529,273 and 1,436,120 shares of unvested restricted stock, respectively)	1,251	1,305
Additional paid-in capital	3,789,893	4,287,487
Retained earnings	1,067,633	723,471
Treasury stock, at cost (1,848,787 and 1,708,230 shares at September 30, 2018 and December 31, 2017)	(73,238)	(65,836)
Accumulated other comprehensive (loss) income, net	(43,854)	31,171
Total stockholders' equity	4,741,685	4,977,598
Total liabilities and stockholders' equity	$ 24,782,126	$ 24,994,876

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Preferred stock par value (usd per share)	$ 0.01	$ 0.01
Preferred stock authorized (shares)	5,000,000	5,000,000
Preferred stock issued (shares)	0	0
Preferred stock outstanding (shares)	0	0
Common Stock par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock issued (shares)	125,132,237	130,491,108
Unvested restricted shares (shares)	1,529,273	1,436,120
Treasury Stock (shares)	1,848,787	1,708,230

XML

Condensed Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Loans and leases	$ 264,062	$ 260,300	$ 235,666	$ 775,447	$ 694,462
Investment securities	28,061	27,730	24,762	81,929	72,490
Deposits in financial institutions	519	484	538	1,555	967
Total interest income	292,642	288,514	260,966	858,931	767,919
Interest expense:
Deposits	21,121	16,367	13,071	51,306	31,653
Borrowings	3,814	2,649	188	7,383	2,272
Subordinated debentures	7,390	7,166	6,017	21,093	17,379
Total interest expense	32,325	26,182	19,276	79,782	51,304
Net interest income	260,317	262,332	241,690	779,149	716,615
Provision for credit losses	11,500	17,500	15,119	33,000	51,346
Net interest income after provision for credit losses	248,817	244,832	226,571	746,149	665,269
Noninterest income:
Service charges on deposit accounts	3,979	4,265	3,465	12,418	10,733
Other commissions and fees	12,397	11,767	9,944	34,429	30,917
Leased equipment income	9,120	9,790	8,332	28,497	29,442
Gain on sale of loans and leases	0	106	2,848	4,675	4,209
Gain on sale of securities	826	253	1,236	7,390	2,788
Other income	10,590	13,457	5,557	27,700	23,689
Total noninterest income	36,912	39,638	31,382	115,109	101,778
Noninterest expense:
Compensation	72,333	69,913	64,413	213,269	194,581
Occupancy	13,069	13,575	12,729	39,867	36,148
Data processing	6,740	6,896	6,459	20,295	19,811
Other professional services	6,058	5,257	4,213	15,754	11,567
Insurance and assessments	5,446	5,330	4,702	16,503	14,349
Intangible asset amortization	5,587	5,587	3,049	17,520	9,178
Leased equipment depreciation	5,001	5,237	4,862	15,613	15,719
Foreclosed assets (income) expense, net	(257)	(61)	2,191	(440)	2,177
Acquisition, integration and reorganization costs	800	0	1,450	800	3,650
Loan expense	2,249	3,058	3,421	7,578	10,692
Other expense	11,127	11,657	11,053	35,238	34,921
Total noninterest expense	128,153	126,449	118,542	381,997	352,793
Earnings before income taxes	157,576	158,021	139,411	479,261	414,254
Income tax expense	(41,289)	(42,286)	(37,945)	(128,963)	(140,473)
Net earnings	$ 116,287	$ 115,735	$ 101,466	$ 350,298	$ 273,781
Earnings per share:
Net earnings (usd per share)	$ 0.94	$ 0.92	$ 0.84	$ 2.79	$ 2.26
Net earnings (usd per share)	$ 0.94	$ 0.92	$ 0.84	$ 2.79	$ 2.26

XML

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings		$ 116,287	$ 115,735	$ 101,466	$ 350,298	$ 273,781
Other comprehensive (loss) income, net of tax:
Unrealized net holding gains (losses) on securities available-for-sale arising during the period		(29,267)	(14,325)	7,812	(106,261)	49,336
Income tax (expense) benefit related to unrealized holding gains (losses) arising during the period		8,344	4,102	(3,198)	30,377	(20,055)
Unrealized net holding gains (losses) on securities available-for-sale, net of tax		(20,923)	(10,223)	4,614	(75,884)	29,281
Reclassification adjustment for net (gains) losses included in net earnings	[1]	(826)	(253)	(1,236)	(7,390)	(2,788)
Income tax expense (benefit) related to reclassification adjustment		235	72	506	2,113	1,138
Reclassification adjustment for net (gains) losses included in net earnings, net of tax		(591)	(181)	(730)	(5,277)	(1,650)
Other comprehensive (loss) income, net of tax		(21,514)	(10,404)	3,884	(81,161)	27,631
Comprehensive income		$ 94,773	$ 105,331	$ 105,350	$ 269,137	$ 301,412

[1] Entire amounts are recognized in "Gain (loss) on sale of securities" on the Condensed Consolidated Statements of Earnings.

XML

Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Shares Of Common Stock	Accumulated Other Comprehensive Income (Loss)
Dividends declared per share (usd per share)		$ 0.50
Beginning Period Balance at Dec. 31, 2016		$ 4,479,055	$ 1,228	$ 4,162,132	$ 366,073	$ (56,360)		$ 5,982
Shares outstanding, beginning balance (shares) at Dec. 31, 2016			121,283,669
Stockholders' Equity Disclosure [Rollforward]
Cumulative effect of change in accounting principle	[1]	291		711	(420)
Net earnings		78,668			78,668
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		6,736						6,736
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			165,648
Restricted stock awarded and earned stock compensation, net of shares forfeited		6,470	$ 2	6,468
Restricted stock surrendered (shares)			(41,184)
Restricted stock surrendered		(2,281)				(2,281)
Cash dividends paid		(60,833)		(60,833)
Ending Period Balance at Mar. 31, 2017		4,508,106	$ 1,230	4,108,478	444,321	(58,641)		12,718
Shares outstanding, ending balance (shares) at Mar. 31, 2017			121,408,133
Beginning Period Balance at Dec. 31, 2016		4,479,055	$ 1,228	4,162,132	366,073	(56,360)		5,982
Shares outstanding, beginning balance (shares) at Dec. 31, 2016			121,283,669
Stockholders' Equity Disclosure [Rollforward]
Net earnings		273,781
Ending Period Balance at Sep. 30, 2017		$ 4,610,668	$ 1,231	4,000,543	639,434	(64,153)		33,613
Shares outstanding, ending balance (shares) at Sep. 30, 2017			121,449,794
Dividends declared per share (usd per share)		$ 0.50
Beginning Period Balance at Mar. 31, 2017		$ 4,508,106	$ 1,230	4,108,478	444,321	(58,641)		12,718
Shares outstanding, beginning balance (shares) at Mar. 31, 2017			121,408,133
Stockholders' Equity Disclosure [Rollforward]
Net earnings		93,647			93,647
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		17,011						17,011
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			147,850
Restricted stock awarded and earned stock compensation, net of shares forfeited		7,249	$ 1	7,248
Restricted stock surrendered (shares)			(107,662)
Restricted stock surrendered		(5,277)				(5,277)
Cash dividends paid		(60,831)		(60,831)
Ending Period Balance at Jun. 30, 2017		$ 4,559,905	$ 1,231	4,054,895	537,968	(63,918)		29,729
Shares outstanding, ending balance (shares) at Jun. 30, 2017			121,448,321
Dividends declared per share (usd per share)		$ 0.50
Stockholders' Equity Disclosure [Rollforward]
Net earnings		$ 101,466			101,466
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		3,884						3,884
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			6,365
Restricted stock awarded and earned stock compensation, net of shares forfeited		6,479	$ 0	6,479
Restricted stock surrendered (shares)			(4,892)
Restricted stock surrendered		(235)				(235)
Cash dividends paid		(60,831)		(60,831)
Ending Period Balance at Sep. 30, 2017		$ 4,610,668	$ 1,231	4,000,543	639,434	(64,153)		33,613
Shares outstanding, ending balance (shares) at Sep. 30, 2017			121,449,794
Dividends declared per share (usd per share)		$ 0.50
Beginning Period Balance at Dec. 31, 2017		$ 4,977,598	$ 1,305	4,287,487	723,471	(65,836)		31,171
Shares outstanding, beginning balance (shares) at Dec. 31, 2017			128,782,878
Stockholders' Equity Disclosure [Rollforward]
Cumulative effect of change in accounting principle	[1]	0			(6,136)			6,136
Net earnings		118,276			118,276
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		(49,243)						(49,243)
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			96,034
Restricted stock awarded and earned stock compensation, net of shares forfeited		7,199	$ 1	7,198
Restricted stock surrendered (shares)			(55,186)				(2,285,855)
Restricted stock surrendered		(2,858)				(2,858)
Common stock repurchased under Stock Repurchase Program		(23)
Common stock repurchased under Stock Repurchase Program		(119,793)		(119,770)		0
Cash dividends paid		(63,689)		(63,689)
Ending Period Balance at Mar. 31, 2018		4,867,490	$ 1,283	4,111,226	835,611	(68,694)		(11,936)
Shares outstanding, ending balance (shares) at Mar. 31, 2018			126,537,871
Beginning Period Balance at Dec. 31, 2017		4,977,598	$ 1,305	4,287,487	723,471	(65,836)		31,171
Shares outstanding, beginning balance (shares) at Dec. 31, 2017			128,782,878
Stockholders' Equity Disclosure [Rollforward]
Net earnings		350,298
Ending Period Balance at Sep. 30, 2018		$ 4,741,685	$ 1,251	3,789,893	1,067,633	(73,238)		(43,854)
Shares outstanding, ending balance (shares) at Sep. 30, 2018			123,283,450
Dividends declared per share (usd per share)		$ 0.60
Beginning Period Balance at Mar. 31, 2018		$ 4,867,490	$ 1,283	4,111,226	835,611	(68,694)		(11,936)
Shares outstanding, beginning balance (shares) at Mar. 31, 2018			126,537,871
Stockholders' Equity Disclosure [Rollforward]
Net earnings		115,735			115,735
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		(10,404)						(10,404)
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			398,132
Restricted stock awarded and earned stock compensation, net of shares forfeited		7,546	$ 4	7,542
Restricted stock surrendered (shares)			(81,172)				(2,286,881)
Restricted stock surrendered		(4,332)				(4,332)
Common stock repurchased under Stock Repurchase Program		(23)
Common stock repurchased under Stock Repurchase Program		(122,024)		(122,001)		0
Cash dividends paid		(76,052)		(76,052)
Ending Period Balance at Jun. 30, 2018		$ 4,777,959	$ 1,264	3,920,715	951,346	(73,026)		(22,340)
Shares outstanding, ending balance (shares) at Jun. 30, 2018			124,567,950
Dividends declared per share (usd per share)		$ 0.60
Stockholders' Equity Disclosure [Rollforward]
Net earnings		$ 116,287			116,287
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		(21,514)						(21,514)
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			(3,803)
Restricted stock awarded and earned stock compensation, net of shares forfeited		8,137	$ 0	8,137
Restricted stock surrendered (shares)			(4,199)				(1,276,498)
Restricted stock surrendered		(212)				(212)
Common stock repurchased under Stock Repurchase Program		(13)
Common stock repurchased under Stock Repurchase Program		(64,577)		(64,564)		0
Cash dividends paid		(74,395)		(74,395)
Ending Period Balance at Sep. 30, 2018		$ 4,741,685	$ 1,251	$ 3,789,893	$ 1,067,633	$ (73,238)		$ (43,854)
Shares outstanding, ending balance (shares) at Sep. 30, 2018			123,283,450

[1] Impact due to adoption on January 1, 2018 of ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income."

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net earnings	$ 350,298	$ 273,781
Depreciation and amortization	25,788	23,798
Amortization of net premiums on securities available-for-sale	19,489	30,238
Amortization of intangible assets	17,520	9,178
Provision for credit losses	33,000	51,346
Loss (gain) on sale of foreclosed assets	35	(282)
Provision for losses on foreclosed assets	65	2,138
Gain on sale of loans and leases	(4,675)	(4,209)
Gain on sale of premises and equipment	(13)	(388)
Gain on sale of securities	(7,390)	(2,788)
Gain on BOLI death benefit	(437)	(1,050)
Unrealized loss (gain) on derivatives and foreign currencies, net	76	(449)
Earned stock compensation	22,882	20,198
(Increase) decrease in deferred income taxes, net	(8,790)	10,164
Decrease (increase) in other assets	52,275	(32,765)
Decrease in accrued interest payable and other liabilities	(36,303)	(20,738)
Net cash provided by operating activities	463,820	358,172
Cash flows from investing activities:
Net increase in loans and leases	(446,880)	(567,291)
Proceeds from sales of loans and leases	646,587	293,808
Proceeds from maturities and paydowns of securities available-for-sale	231,474	329,876
Proceeds from sales of securities available-for-sale	500,101	185,533
Purchases of securities available-for-sale	(910,298)	(804,710)
Net (purchases) redemptions of Federal Home Loan Bank stock	(10,287)	4,620
Proceeds from sales of foreclosed assets	57	1,455
Purchases of premises and equipment, net	(9,250)	(5,892)
Proceeds from sales of premises and equipment	49	10,306
Proceeds from BOLI death benefit	1,901	2,478
Net decrease in equipment leased to others under operating leases	(6,000)	(17,956)
Net cash used in investing activities	(2,546)	(567,773)
Cash flows from financing activities:
Net (decrease) increase in noninterest-bearing deposits	(671,016)	255,874
Net (decrease) increase in interest-bearing deposits	(312,429)	649,776
Net increase (decrease) in borrowings	1,045,824	(655,413)
Early Repayment of Subordinated Debt	(12,372)	0
Common stock repurchased and restricted stock surrendered	(313,796)	(7,793)
Cash dividends paid	(214,136)	(182,495)
Net cash (used in) provided by financing activities	(477,925)	59,949
Net decrease in cash, cash equivalents, and restricted cash	(16,651)	(149,652)
Cash, cash equivalents, and restricted cash, beginning of period	398,437	419,670
Cash, cash equivalents, and restricted cash, end of period	381,786	270,018
Supplemental disclosures of cash flow information:
Cash paid for interest	78,884	48,402
Cash paid for income taxes	62,525	146,321
Loans transferred to foreclosed assets	3,235	580
Transfers from loans held for investment to loans held for sale	$ 0	$ 175,158

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Organization

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

ORGANIZATION    

PacWest Bancorp, a Delaware corporation, is a bank holding company registered under the BHCA, with our corporate headquarters located in Beverly Hills, California. Our principal business is to serve as the holding company for our wholly-owned subsidiary, Pacific Western Bank. References to "Pacific Western" or the "Bank" refer to Pacific Western Bank together with its wholly-owned subsidiaries. References to "we," "us," or the "Company" refer to PacWest Bancorp together with its subsidiaries on a consolidated basis. When we refer to "PacWest" or to the "holding company," we are referring to PacWest Bancorp, the parent company, on a stand-alone basis.

We are focused on relationship-based business banking to small, middle-market and venture-backed businesses nationwide. At September 30, 2018, the Bank offers a broad range of loan and lease and deposit products and services through 74 full-service branches located throughout the State of California, one branch located in Durham, North Carolina, and numerous loan production offices located in cities across the country. Community Banking provides lending and comprehensive deposit and treasury management services to small and medium-sized businesses conducted primarily through our California-based branch offices. We offer additional products and services through our National Lending and Venture Banking groups. National Lending provides asset-based, equipment, real estate, and security cash flow loans and treasury management services to established middle-market businesses on a national basis. Venture Banking offers a comprehensive suite of financial services focused on entrepreneurial businesses and their venture capital and private equity investors, with offices located in key innovation hubs across the United States. In addition, we provide investment advisory and asset management services to select clients through Square 1 Asset Management, Inc., a wholly-owned subsidiary of the Bank and a SEC-registered investment adviser.

We generate our revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities, and fees received in connection with deposit services, extending credit and other services offered, including foreign exchange services. Our major operating expenses are compensation, occupancy, general operating expenses, and the interest paid by the Bank on deposits and borrowings.

We have completed 29 acquisitions from May 1, 2000 through September 30, 2018. Our acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates. See Note 3. Acquisitions, for more information about the CUB acquisition.

El Dorado Savings Bank Merger Announcement

On September 11, 2018, PacWest entered into a definitive agreement and plan of merger (the “Agreement”) whereby PacWest will acquire El Dorado Savings Bank, F.S.B. (“El Dorado”) in a transaction valued at approximately $466.7 million.

El Dorado, headquartered in Placerville, California, is a federally chartered savings bank founded in 1958, with approximately $2.2 billion in assets and 35 branches located primarily in eight Northern California counties and two Northern Nevada counties. In connection with the transaction, El Dorado will be merged into the Bank.

The transaction, which was approved by the PacWest and El Dorado boards of directors, is expected to close in the first quarter of 2019 and is subject to customary closing conditions, including obtaining approval by bank regulatory authorities and El Dorado’s shareholders.

Significant Accounting Policies

Our accounting policies are described in Note 1. Nature of Operations and Summary of Significant Accounting Policies, of our audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission ("Form 10-K"). Updates to our significant accounting policies described below reflect the impact of the adoption of ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.”

Investment Securities

Our significant accounting policy for investment securities applied to both debt and equity securities in prior periods. Effective January 1, 2018, upon the adoption of ASUs 2016-01 and 2018-03, our significant accounting policy for investment securities applies only to debt securities.

Equity Investments

Investments in common or preferred stock that are not publicly traded and certain investments in limited partnerships are considered equity investments that do not have a readily determinable fair value. If we have the ability to significantly influence the operating and financial policies of the investee, the investment is accounted for pursuant to the equity method of accounting. This is generally presumed to exist when we own between 20% and 50% of a corporation, or when we own greater than 5% of a limited partnership or similarly structured entity. Our equity investment carrying values are included in other assets and our share of earnings and losses in equity method investees is included in "Noninterest income - other" on the condensed consolidated statements of earnings. Prior to January 1, 2018, if we did not have significant influence over the investee, the cost method was used to accountfor the equity interest.

Effective January 1, 2018 with the adoption of ASU 2016-01, our accounting treatment for equity investments differs for those with and without readily determinable fair values. Equity investments with readily determinable fair values are recorded at fair value with changes in fair value recorded in “Noninterest income - other.” For equity investments without readily determinable fair values we have elected the “measurement alternative,” and therefore carry these investments at cost, less impairment (if any), plus or minus changes in observable prices. On a quarterly basis, we review our equity investments without readily determinable fair values for impairment. We consider a number of qualitative factors such as whether there is a significant deterioration in earnings performance, credit rating, asset quality, or business prospects of the investee in determining if impairment exists. If the investment is considered impaired, an impairment loss equal to the amount by which the carrying value exceeds its fair value is recorded through a charge to earnings. The impairment loss may be reversed in a subsequent period if there are observable transactions for the identical or similar investment of the same issuer at a higher amount than the carrying amount that was established when the impairment was recognized. Impairment as well as upward or downward adjustments resulting from observable price changes in orderly transactions for identical or similar investments are included in “Noninterest income - other.”

Realized gains or losses resulting from the sale of equity investments are calculated using the specific identification method and are included in "Noninterest income - other."

Comprehensive Income

Comprehensive income consists of net earnings and net unrealized gains (losses) on debt securities available‑for‑sale, net, and is presented in the consolidated statements of comprehensive income.

Accounting Standards Adopted in 2018

Effective January 1, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 contained a number of changes which are applicable to the Company including the following: (1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; (2) allows equity investments without readily determinable fair values to be measured at cost less impairment, if any, plus or minus changes in observable prices (referred to as the "measurement alternative"); and (3) changes certain presentation and disclosure requirements for financial instruments, including using the exit price notion when measuring the fair value of financial instruments (see Note 11. Fair Value Measurements). ASU 2018-03 also clarified certain aspects of the guidance issued in ASU 2016-01, including requiring a prospective transition approach for equity investments without readily determinable fair value in which the measurement alternative is applied.

ASU 2016-01 does not apply to investments accounted for using the equity method, investments in consolidated subsidiaries, FHLB stock, and investments in low income housing tax credit projects. Upon adoption of ASU 2016-01, the Company recorded a transition adjustment to reclassify $529,000 in net unrealized gains from accumulated other comprehensive income ("AOCI") to retained earnings. The ASU also eliminated the requirement to classify equity investments into different categories such as “Available-for-sale.” The adoption of this ASU may result in more earnings volatility as changes in fair value of certain equity investments will now be recorded in the statement of earnings as opposed to AOCI.

Effective January 1, 2018, the Company early-adopted ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The TCJA required deferred tax assets and liabilities to be re-measured at its enactment date for the effect of the change in the federal corporate tax rate. This process resulted in "stranded tax effects" in AOCI for deferred tax asset or liabilities which were established with an offsetting amount in AOCI. ASU 2018-02 allows for a reclassification of the stranded tax effects resulting from the enactment of the TCJA from AOCI to retained earnings. The Company elected to reclassify its stranded tax effects of $6.665 million from AOCI to retained earnings effective January 1, 2018, while no other income tax effects related to the application of the TCJA were reclassified.

Effective January 1, 2018, the Company adopted ASU 2014-09, "Revenue Recognition (Topic 606): Revenue from Contracts with Customers." ASU 2014-09 supersedes Topic 605, "Revenue Recognition" and requires an entity to recognize revenue at an amount that reflects the consideration to which it expects to be entitled to in exchange for the transfer of promised goods or services to customers.

Substantially all of the Company's revenue is interest income on loans, investment securities, and deposits at other financial institutions which are specifically outside the scope of ASU 2014-09. ASU 2014-09 applies primarily to certain noninterest income items in the Company's condensed consolidated statement of earnings. The Company adopted ASU 2014-09 as of January 1, 2018 using the cumulative effect transition method, which resulted in no adjustment to retained earnings and no material impact on the Company's consolidated financial position, results of operations, or cash flows. The Company did make minor changes to accounting operations and internal controls as part of adopting this new standard. See Note 13. Revenue From Contracts With Customers for further details.

Effective January 1, 2018, the Company adopted ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments." Upon adoption, the Company applied the retrospective transition method to each period presented. ASU 2016-15 addressed eight issues related to the statement of cash flows, the most relevant to the Company being the classification of proceeds from the settlement of BOLI policies. As the Company classified proceeds from the settlement of BOLI policies in the manner required by ASU 2016-15 in the prior periods presented, there was no change to the Company's consolidated financial position, results of operations, or cash flows for both current and prior periods upon adoption.

Effective January 1, 2018, the Company adopted ASU 2016-18, "Statement of Cash Flows (Topic 230): Restricted Cash." Upon adoption, the Company applied the retrospective transition method to each period presented. As the Company does not present restricted cash as a separate line in the statement of financial position, there is no change to the presentation of cash on the statement of cash flows. The nature and amount of our restricted cash is shown in Note 2. Restricted Cash Balances.

Effective January 1, 2018, the Company adopted ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business." ASU 2017-01 provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses.The Company had no acquisitions or purchases of components of a business in the first three quarters of 2018, thus, the impact of adopting the new standard had no impact on the Company's consolidated financial position, results of operations, or cash flows.

Effective January 1, 2018, the Company adopted ASU 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting." ASU 2017-09 provided clarification of what constitutes a modification of a share-based payment award. The Company did not modify any share-based payment awards in the first three quarters of 2018, thus, the impact of adopting the new standard had no impact on the Company's consolidated financial position, results of operations, or cash flows.

Basis of Presentation

Our interim condensed consolidated financial statements are prepared in accordance with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, certain disclosures accompanying annual consolidated financial statements are omitted. In the opinion of management, all significant intercompany accounts and transactions have been eliminated and adjustments, consisting solely of normal recurring accruals and considered necessary for the fair presentation of financial statements for the interim periods, have been included. The current period's results of operations are not necessarily indicative of the results that ultimately may be achieved for the year. The interim condensed consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Form 10-K.

Use of Estimates

We have made a number of estimates and assumptions related to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period to prepare these condensed consolidated financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates. Material estimates subject to change in the near term include, among other items, the allowance for credit losses (the combination of the allowance for loan and lease losses and the reserve for unfunded loan commitments), the carrying value of intangible assets, the realization of deferred tax assets, and the fair value estimates of assets acquired and liabilities assumed in acquisitions. These estimates may be adjusted as more current information becomes available, and any adjustment may be significant.

The allowance for loan and lease losses (“ALLL”) represents management’s estimate of probable credit losses inherent in the loan portfolio as of the balance sheet date. During the second quarter of 2018, the Company changed its ALLL methodology due to the growth and increased complexity of the loan portfolio. The new ALLL methodology included three primary changes: the quantitative component now employs a probability of default/loss given default ("PD/LGD") methodology; the loan segmentation groups our loan portfolio into 21 loan segments with similar risk characteristics (as opposed to 34 loan segments used under the previous methodology); and the historical range of loan performance history (often referred to as the look-back period) was lengthened by one year. The methodology for assessing individually impaired loans did not change under the new ALLL methodology. The ALLL methodology used to derive qualitative adjustments based on other internal or external factors was updated to align with the new PD/LGD methodology being applied to estimate the quantitative general allowance for unimpaired loans. As a result, the composition of the ALLL changed as the quantitative component increased and the qualitative component decreased as the new quantitative methodology now encompasses more information, such as the longer look-back period, that previously required a qualitative adjustment as part of determining the total ALLL estimate. These changes in the ALLL methodology did not result in material changes to management's overall estimate of the ALLL.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period’s presentation format. In our loan and allowance tables, we realigned our commercial loan portfolio classes and subclasses to better reflect and report our lending, especially in light of the fourth quarter of 2017 cash flow loan sale and the exiting of the origination operations related to general, technology, and healthcare cash flow loans. Prior to the realignment, our commercial portfolio classes were: (1) asset-based, (2) venture capital, (3) cash flow, and (4) equipment finance. After the realignment, our commercial portfolio classes are (1) asset-based (which includes equipment finance), (2) venture capital, and (3) other commercial (which includes retained cash flow). All of the loan and allowance tables, both current period and prior periods, reflect this realignment.

Prior to January 1, 2018, our credit quality disclosures were only for Non-PCI loans and leases. As our gross PCI loan portfolio reduced to less than 0.4% of total loans as of the end of 2017, beginning in 2018 the credit quality disclosures reflect our entire loan and lease portfolio. Accordingly, for the credit quality tables in Note 6. Loans and Leases, amounts related to the 2018 periods are for total loans and leases, while amounts related to the 2017 periods are for Non-PCI loans and leases only.

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Restricted Cash Balances

9 Months Ended

Sep. 30, 2018

Restricted Cash [Abstract]

Restricted Cash Balances

RESTRICTED CASH BALANCES

The Company is required to maintain reserve balances with the FRBSF. Such reserve requirements are based on a percentage of deposit liabilities and may be satisfied by cash on hand. The average reserves required to be held at the FRBSF for the nine months endedSeptember 30, 2018 and year ended December 31, 2017 were $76.9 million and $77.6 million. As of September 30, 2018 and December 31, 2017, we pledged cash collateral for our derivative contracts of $2.3 million and $2.7 million.

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Acquisitions

9 Months Ended

Sep. 30, 2018

Acquisitions [Abstract]

Acquisitions

ACQUISITIONS    

CUB Acquisition

On October 20, 2017, we completed the acquisition of CUB. As part of the acquisition, CU Bank, a wholly-owned subsidiary of CUB, was merged with and into the Bank.

We completed the acquisition to, among other things, enhance our Southern California community bank franchise by adding a $2.1 billion loan portfolio and $2.7 billion of core deposits. The CUB acquisition has been accounted for under the acquisition method of accounting. We acquired$3.5 billionof assets and assumed$2.8 billionof liabilities upon closing of the acquisition. The assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of the acquisition date.

We made significant estimates and exercised significant judgment in estimating fair values and accounting for such acquired assets and liabilities. Such fair values are provisional for up to one year after the acquisition date or when additional information relative to the closing date fair values becomes available and such information is considered final, whichever is earlier. The application of the acquisition method of accounting resulted in goodwill of$374.7 million. All of the recognized goodwill is non-deductible for tax purposes.

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Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill and other intangible assets arise from the acquisition method of accounting for business combinations. Goodwill and other intangible assets generated from business combinations and deemed to have indefinite lives are not subject to amortization and instead are tested for impairment at least annually. Goodwill represents the excess of the purchase price over the fair value of the net assets and other identifiable intangible assets acquired. Impairment exists when the carrying value of the goodwill exceeds its implied fair value. An impairment loss would be recognized in an amount equal to that excess as a charge to "Noninterest expense" in the condensed consolidated statements of earnings.

Our other intangible assets with definite lives include CDI and CRI. CDI and CRI are amortized over their respective estimated useful lives and reviewed for impairment at least quarterly. The amortization expense represents the estimated decline in the value of the underlying deposits or loan and lease customers acquired. The aggregate amortization expense is expected to be $22.5 million for 2018. The estimated aggregate amortization expense related to our current intangible assets for each of the next five years is $18.7 million for 2019, $14.6 million for 2020, $10.8 million for 2021, $7.5 million for 2022, and $1.4 million for 2023.

The following table presents the changes in CDI and CRI and the related accumulated amortization for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(In thousands)
Gross Amount of CDI and CRI:
Balance, beginning of period	$	119,497		$	119,497		$	64,187		$	119,497		$	64,187
Fully amortized portion	—			—			(2,190		)	—			(2,190		)
Balance, end of period	119,497			119,497			61,997			119,497			61,997
Accumulated Amortization:
Balance, beginning of period	(51,804		)	(46,217		)	(33,950		)	(39,871		)	(27,821		)
Amortization	(5,587		)	(5,587		)	(3,049		)	(17,520		)	(9,178		)
Fully amortized portion	—			—			2,190			—			2,190
Balance, end of period	(57,391		)	(51,804		)	(34,809		)	(57,391		)	(34,809		)
Net CDI and CRI, end of period	$	62,106		$	67,693		$	27,188		$	62,106		$	27,188

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Investment Securities

9 Months Ended

Sep. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Investment Securities

INVESTMENT SECURITIES     

Securities Available-for-Sale

The following table presents amortized cost, gross unrealized gains and losses, and fair values of securities available-for-sale as of the dates indicated:

	September 30, 2018									December 31, 2017
			Gross		Gross							Gross		Gross
	Amortized		Unrealized		Unrealized			Fair		Amortized		Unrealized		Unrealized			Fair
Security Type	Cost		Gains		Losses			Value		Cost		Gains		Losses			Value
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	251,150	$	1,971	$	(3,290	)	$	249,831	$	243,375	$	3,743	$	(844	)	$	246,274
Agency CMOs	583,062		220		(13,677		)	569,605		277,638		968		(2,897		)	275,709
Private label CMOs	110,353		2,699		(2,602		)	110,450		122,816		3,813		(642		)	125,987
Municipal securities	1,272,501		10,974		(11,892		)	1,271,583		1,627,707		53,700		(1,339		)	1,680,068
Agency commercial MBS	1,117,749		—		(40,744		)	1,077,005		1,169,969		2,758		(8,758		)	1,163,969
U.S. Treasury securities	400,591		—		(2,960		)	397,631		—		—		—			—
SBA securities	69,999		—		(2,413		)	67,586		160,214		695		(575		)	160,334
Asset-backed securities	59,322		18		(888		)	58,452		89,425		159		(874		)	88,710
Corporate debt securities	17,000		1,190		—			18,190		17,000		2,295		—			19,295
Collateralized loan obligations	—		—		—			—		6,960		55		—			7,015
Equity investments (1)	—		—		—			—		6,421		779		(130		)	7,070
Total	$	3,881,727	$	17,072	$	(78,466	)	$	3,820,333	$	3,721,525	$	68,965	$	(16,059	)	$	3,774,431

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

As of September 30, 2018, securities available-for-sale with a fair value of $427.8 million were pledged as collateral for borrowings, public deposits, and other purposes as required by various statutes and agreements.

Realized Gains and Losses on Securities Available-for-Sale

During the three months ended September 30, 2018, we sold $130.5 million of securities available-for-sale for a gross realized gain of $958,000 and a gross realized loss of $132,000. During the three months ended September 30, 2017, we sold $98.3 million of securities available-for-sale for a gross realized gain of $1.3 million and a gross realized loss of $119,000.

During the nine months endedSeptember 30, 2018, we sold $492.7 million of securities available-for-sale for a gross realized gain of $8.1 million and a gross realized loss of $707,000. During the nine months endedSeptember 30, 2017, we sold $182.7 million of securities available-for-sale for a gross realized gain of $3.3 million and a gross realized loss of $498,000.

Unrealized Losses on Securities Available-for-Sale

The following tables present the gross unrealized losses and fair values of securities available-for-sale that were in unrealized loss positions, for which other-than-temporary impairments have not been recognized in earnings, as of the dates indicated:

	September 30, 2018
	Less Than 12 Months					12 Months or More					Total
			Gross					Gross					Gross
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Security Type	Value		Losses			Value		Losses			Value		Losses
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	76,238	$	(1,332	)	$	51,861	$	(1,958	)	$	128,099	$	(3,290	)
Agency CMOs	401,795		(6,418		)	140,997		(7,259		)	542,792		(13,677		)
Private label CMOs	46,713		(1,101		)	34,654		(1,501		)	81,367		(2,602		)
Municipal securities	436,012		(8,743		)	55,402		(3,149		)	491,414		(11,892		)
Agency commercial MBS	784,452		(26,454		)	292,553		(14,290		)	1,077,005		(40,744		)
U.S. Treasury securities	397,631		(2,960		)	—		—			397,631		(2,960		)
SBA securities	32,867		(1,143		)	34,719		(1,270		)	67,586		(2,413		)
Asset-backed securities	20,815		(147		)	35,278		(741		)	56,093		(888		)
Total	$	2,196,523	$	(48,298	)	$	645,464	$	(30,168	)	$	2,841,987	$	(78,466	)

	December 31, 2017
	Less Than 12 Months					12 Months or More					Total
			Gross					Gross					Gross
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Security Type	Value		Losses			Value		Losses			Value		Losses
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	44,795	$	(311	)	$	26,010	$	(533	)	$	70,805	$	(844	)
Agency CMOs	163,014		(2,452		)	20,928		(445		)	183,942		(2,897		)
Private label CMOs	50,521		(500		)	5,035		(142		)	55,556		(642		)
Municipal securities	67,936		(365		)	32,326		(974		)	100,262		(1,339		)
Agency commercial MBS	579,373		(3,777		)	129,060		(4,981		)	708,433		(8,758		)
SBA securities	74,904		(575		)	—		—			74,904		(575		)
Asset-backed securities	45,198		(818		)	10,473		(56		)	55,671		(874		)
Equity investments (1)	1,039		(130		)	—		—			1,039		(130		)
Total	$	1,026,780	$	(8,928	)	$	223,832	$	(7,131	)	$	1,250,612	$	(16,059	)

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

We reviewed the securities that were in an unrealized loss position at September 30, 2018, and concluded their unrealized losses were a result of the level of market interest rates relative to the types of securities and pricing changes caused by shifting supply and demand dynamics and not a result of downgraded credit ratings or other indicators of deterioration of the underlying issuers' ability to repay. Accordingly, we determined the securities were temporarily impaired and we did not recognize such impairment in the condensed consolidated statements of earnings. Although we periodically sell securities for portfolio management purposes, we do not foresee having to sell any temporarily impaired securities strictly for liquidity needs and believe that it is more likely than not we would not be required to sell any temporarily impaired securities before recovery of their amortized cost.

Contractual Maturities of Securities Available-for-Sale

The following table presents the contractual maturities of our securities available-for-sale portfolio based on amortized cost and carrying value as of the date indicated:

	September 30, 2018
	Amortized		Fair
Maturities	Cost		Value
	(In thousands)
Due in one year or less	$	39,300	$	39,272
Due after one year through five years	716,172		707,368
Due after five years through ten years	970,758		937,317
Due after ten years	2,155,497		2,136,376
Total securities available-for-sale	$	3,881,727	$	3,820,333

Mortgage-backed securities have contractual terms to maturity, but require periodic payments to reduce principal. In addition, expected maturities may differ from contractual maturities because obligors and/or issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

Interest Income on Investment Securities

The following table presents the composition of our interest income on investment securities for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,		June 30,		September 30,		September 30,
	2018		2018		2017		2018		2017
	(In thousands)
Taxable interest	$	17,618	$	17,106	$	13,576	$	49,323	$	39,257
Non-taxable interest	10,127		10,276		10,795		31,510		31,926
Dividend income	316		348		391		1,096		1,307
Total interest income on investment securities	$	28,061	$	27,730	$	24,762	$	81,929	$	72,490

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Loans and Leases

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Loans and Leases

LOANS AND LEASES

Our loans are carried at the principal amount outstanding, net of deferred fees and costs, and in the case of acquired loans, net of purchase discounts and premiums. Deferred fees and costs and purchase discounts and premiums on acquired non-impaired loans are recognized as an adjustment to interest income over the contractual life of the loans primarily using the effective interest method or taken into income when the related loans are paid off or included in the carrying amount of loans that are sold.

Prior to January 1, 2018, our loan and lease portfolio consisted of Non-PCI loans and leases and PCI loans. Non-PCI loans and leases were those we originated or those we acquired that were not credit impaired at the dates of acquisition. PCI loans were purchased loans for which there was, at the acquisition date, evidence of credit deterioration since their origination and for which it was probable that collection of all contractually required payments was unlikely. As our gross PCI loan portfolio represented less than 0.4% of total loans as of the end of 2017, beginning in 2018 the PCI loans were accounted for as Non-PCI loans. Accordingly, in the credit quality tables below under "Loans and leases held for investment," amounts related to the 2018 period are for total loans and leases, and amounts related to the 2017 period are for Non-PCI loans and leases.

Loans and Leases Held for Investment

The following table summarizes the composition of our loans and leases held for investment as of the dates indicated:

	September 30, 2018			December 31, 2017
	Total			Non-PCI						Total
	Loans			Loans			PCI			Loans
	and Leases			and Leases			Loans			and Leases
	(In thousands)
Real estate mortgage	$	7,695,182		$	7,815,355		$	53,658		$	7,869,013
Real estate construction and land	2,026,645			1,611,287			—			1,611,287
Commercial	7,175,310			7,137,978			4,158			7,142,136
Consumer	398,452			409,551			234			409,785
Total gross loans and leases held for investment	17,295,589			16,974,171			58,050			17,032,221
Deferred fees, net	(65,443		)	(59,464		)	(14		)	(59,478		)
Total loans and leases held for investment,
net of deferred fees	17,230,146			16,914,707			58,036			16,972,743
Allowance for loan and lease losses	(141,920		)	(133,012		)	(6,444		)	(139,456		)
Total loans and leases held for investment, net	$	17,088,226		$	16,781,695		$	51,592		$	16,833,287

The following tables present an aging analysis of our loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated:

	September 30, 2018
	30 - 89		90 or More
	Days		Days		Total
	Past Due		Past Due		Past Due		Current		Total
	(In thousands)
Real estate mortgage:
Commercial	$	2,221	$	8,949	$	11,170	$	4,921,653	$	4,932,823
Residential	5,647		445		6,092		2,739,745		2,745,837
Total real estate mortgage	7,868		9,394		17,262		7,661,398		7,678,660
Real estate construction and land:
Commercial	—		—		—		854,346		854,346
Residential	8,498		—		8,498		1,138,113		1,146,611
Total real estate construction and land	8,498		—		8,498		1,992,459		2,000,957
Commercial:
Asset-based	—		655		655		3,221,656		3,222,311
Venture capital	1,028		497		1,525		2,030,370		2,031,895
Other commercial	222		3,724		3,946		1,893,906		1,897,852
Total commercial	1,250		4,876		6,126		7,145,932		7,152,058
Consumer	605		45		650		397,821		398,471
Total	$	18,221	$	14,315	$	32,536	$	17,197,610	$	17,230,146

	December 31, 2017 (1)
	30 - 89		90 or More
	Days		Days		Total
	Past Due		Past Due		Past Due		Current		Total
	(In thousands)
Real estate mortgage:
Commercial	$	29,070	$	9,107	$	38,177	$	5,323,310	$	5,361,487
Residential	6,999		2,022		9,021		2,428,483		2,437,504
Total real estate mortgage	36,069		11,129		47,198		7,751,793		7,798,991
Real estate construction and land:
Commercial	—		—		—		769,075		769,075
Residential	2,081		—		2,081		820,073		822,154
Total real estate construction and land	2,081		—		2,081		1,589,148		1,591,229
Commercial:
Asset-based	344		690		1,034		2,923,837		2,924,871
Venture capital	6,533		760		7,293		2,115,418		2,122,711
Other commercial	2,846		1,586		4,432		2,062,906		2,067,338
Total commercial	9,723		3,036		12,759		7,102,161		7,114,920
Consumer	562		—		562		409,005		409,567
Total (1)	$	48,435	$	14,165	$	62,600	$	16,852,107	$	16,914,707

________________________

(1) Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

It is our policy to discontinue accruing interest when principal or interest payments are past due 90 days or more (unless the loan is both well secured and in the process of collection) or when, in the opinion of management, there is a reasonable doubt as to the collectability of a loan or lease in the normal course of business. Interest income on nonaccrual loans is recognized only to the extent cash is received and the principal balance of the loan is deemed collectable.

The following table presents our nonaccrual and performing loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated:

	September 30, 2018						December 31, 2017 (1)
	Nonaccrual		Performing		Total		Nonaccrual		Performing		Total
	(In thousands)
Real estate mortgage:
Commercial	$	29,723	$	4,903,100	$	4,932,823	$	65,563	$	5,295,924	$	5,361,487
Residential	3,259		2,742,578		2,745,837		3,350		2,434,154		2,437,504
Total real estate mortgage	32,982		7,645,678		7,678,660		68,913		7,730,078		7,798,991
Real estate construction and land:
Commercial	—		854,346		854,346		—		769,075		769,075
Residential	—		1,146,611		1,146,611		—		822,154		822,154
Total real estate construction and land	—		2,000,957		2,000,957		—		1,591,229		1,591,229
Commercial:
Asset-based	34,619		3,187,692		3,222,311		33,553		2,891,318		2,924,871
Venture capital	35,520		1,996,375		2,031,895		29,424		2,093,287		2,122,711
Other commercial	9,579		1,888,273		1,897,852		23,874		2,043,464		2,067,338
Total commercial	79,718		7,072,340		7,152,058		86,851		7,028,069		7,114,920
Consumer	272		398,199		398,471		20		409,547		409,567
Total	$	112,972	$	17,117,174	$	17,230,146	$	155,784	$	16,758,923	$	16,914,707

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

At September 30, 2018, nonaccrual loans and leases totaled $113.0 million and included $14.3 million of loans and leases 90 or more days past due, $1.6 million of loans and leases 30 to 89 days past due, and $97.0 million of loans and leases current with respect to contractual payments that were placed on nonaccrual status based on management’s judgment regarding their collectability. Nonaccrual loans and leases totaled $155.8 million at December 31, 2017, including $14.2 million of loans and leases 90 or more days past due, $3.2 million of loans and leases 30 to 89 days past due, and $138.4 million of current loans and leases that were placed on nonaccrual status based on management’s judgment regarding their collectability.

As of September 30, 2018, our ten largest loan relationships on nonaccrual status had an aggregate carrying value of $83.2 million and represented 73.7% of total nonaccrual loans and leases.

The following table presents the credit risk rating categories for loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated. Classified loans and leases are those with a credit risk rating of either substandard or doubtful.

	September 30, 2018
	Classified		Special Mention		Pass		Total
	(In thousands)
Real estate mortgage:
Commercial	$	64,574	$	140,611	$	4,727,638	$	4,932,823
Residential	11,254		12,036		2,722,547		2,745,837
Total real estate mortgage	75,828		152,647		7,450,185		7,678,660
Real estate construction and land:
Commercial	442		3,833		850,071		854,346
Residential	—		24,645		1,121,966		1,146,611
Total real estate construction and land	442		28,478		1,972,037		2,000,957
Commercial:
Asset-based	42,960		64,778		3,114,573		3,222,311
Venture capital	47,230		65,295		1,919,370		2,031,895
Other commercial	93,564		47,164		1,757,124		1,897,852
Total commercial	183,754		177,237		6,791,067		7,152,058
Consumer	435		1,696		396,340		398,471
Total	$	260,459	$	360,058	$	16,609,629	$	17,230,146

	December 31, 2017 (1)
	Classified		Special Mention		Pass		Total
	(In thousands)
Real estate mortgage:
Commercial	$	93,795	$	122,488	$	5,145,204	$	5,361,487
Residential	8,425		4,582		2,424,497		2,437,504
Total real estate mortgage	102,220		127,070		7,569,701		7,798,991
Real estate construction and land:
Commercial	—		—		769,075		769,075
Residential	—		619		821,535		822,154
Total real estate construction and land	—		619		1,590,610		1,591,229
Commercial:
Asset-based	51,000		37,256		2,836,615		2,924,871
Venture capital	49,671		114,210		1,958,830		2,122,711
Other commercial	75,251		21,883		1,970,204		2,067,338
Total commercial	175,922		173,349		6,765,649		7,114,920
Consumer	263		1,130		408,174		409,567
Total	$	278,405	$	302,168	$	16,334,134	$	16,914,707

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

In addition to our internal risk rating process, our federal and state banking regulators, as an integral part of their examination process, periodically review the Company’s loan and lease risk rating classifications. Our regulators may require the Company to recognize rating downgrades based on their judgments related to information available to them at the time of their examinations. Risk rating downgrades generally result in increases in the provisions for credit losses and the allowance for credit losses.

Nonaccrual loans and leases and performing TDRs are considered impaired for reporting purposes. TDRs are a result of rate reductions, term extensions, fee concessions, and debt forgiveness, or a combination thereof.

The following table presents the composition of our impaired loans and leases held for investment, net of deferred fees, by portfolio segment as of the dates indicated:

	September 30, 2018						December 31, 2017 (1)
					Total						Total
	Nonaccrual				Impaired		Nonaccrual				Impaired
	Loans				Loans		Loans				Loans
	and		Performing		and		and		Performing		and
	Leases		TDRs		Leases		Leases		TDRs		Leases
	(In thousands)
Real estate mortgage	$	32,982	$	15,296	$	48,278	$	68,913	$	47,560	$	116,473
Real estate construction and land	—		5,533		5,533		—		5,690		5,690
Commercial	79,718		1,166		80,884		86,851		3,488		90,339
Consumer	272		111		383		20		100		120
Total	$	112,972	$	22,106	$	135,078	$	155,784	$	56,838	$	212,622

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

The following tables present information regarding our impaired loans and leases held for investment, net of deferred fees, by portfolio segment and class as of and for the dates indicated:

	September 30, 2018						December 31, 2017 (1)
			Unpaid						Unpaid
	Recorded		Principal		Related		Recorded		Principal		Related
Impaired Loans and Leases	Investment		Balance		Allowance		Investment		Balance		Allowance
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	1,682	$	225	$	15,750	$	16,548	$	628
Residential	2,495		2,536		271		2,787		2,957		342
Commercial:
Venture capital	34,515		36,149		19,003		16,565		17,203		4,267
Other commercial	1,360		1,361		1,360		20,404		29,951		8,368
Consumer	—		—		—		100		100		16
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	36,087	$	54,497			$	93,827	$	105,923
Residential	7,915		10,172				4,109		4,481
Real estate construction and land:
Commercial	5,533		5,537				5,690		5,689
Commercial:
Asset-based	34,618		40,085				33,553		54,911
Venture capital	1,421		26,853				14,534		40,029
Other commercial	8,970		28,343				5,283		9,351
Consumer	383		547				20		93
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	48,278	$	68,887	$	496	$	116,473	$	129,909	$	970
Real estate construction and land	5,533		5,537		—		5,690		5,689		—
Commercial	80,884		132,791		20,363		90,339		151,445		12,635
Consumer	383		547		—		120		193		16
Total	$	135,078	$	207,762	$	20,859	$	212,622	$	287,236	$	13,621

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

	Three Months Ended September 30,
	2018				2017
	Weighted		Interest		Weighted		Interest
	Average		Income		Average		Income
Impaired Loans and Leases	Balance(1)		Recognized		Balance(1)		Recognized
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	18	$	14,716	$	214
Residential	2,494		21		3,074		14
Commercial:
Venture capital	28,322		—		18,298		—
Other commercial	1,360		—		33,486		31
Consumer	—		—		106		2
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	34,155	$	129	$	92,183	$	635
Residential	7,906		45		3,670		15
Real estate construction and land:
Commercial	5,533		95		5,764		74
Commercial:
Asset-based	34,618		—		31,086		—
Venture capital	1,421		—		2,647		—
Other commercial	8,108		25		3,695		40
Consumer	383		2		296		—
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	46,336	$	213	$	113,643	$	878
Real estate construction and land	5,533		95		5,764		74
Commercial	73,829		25		89,212		71
Consumer	383		2		402		2
Total	$	126,081	$	335	$	209,021	$	1,025

_________________________

(1) For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

	Nine Months Ended September 30,
	2018				2017
	Weighted		Interest		Weighted		Interest
	Average		Income		Average		Income
Impaired Loans and Leases	Balance(1)		Recognized		Balance(1)		Recognized
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	55	$	14,716	$	634
Residential	2,494		62		3,074		41
Commercial:
Venture capital	17,459		—		9,621		—
Other commercial	688		—		33,193		88
Consumer	—		—		106		6
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	32,098	$	376	$	90,631	$	1,924
Residential	7,845		132		3,650		44
Real estate construction and land:
Commercial	5,533		283		5,764		220
Commercial:
Asset-based	34,618		—		30,682		—
Venture capital	1,330		—		1,922		—
Other commercial	7,417		70		3,044		68
Consumer	373		6		296		—
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	44,218	$	625	$	112,071	$	2,643
Real estate construction and land	5,533		283		5,764		220
Commercial	61,512		70		78,462		156
Consumer	373		6		402		6
Total	$	111,636	$	984	$	196,699	$	3,025

_________________________

(1) For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

The following table presents our troubled debt restructurings of loans held for investment by portfolio segment and class for the periods indicated:

	Three Months Ended September 30,
	2018					2017
		Pre-		Post-			Pre-		Post-
		Modification		Modification			Modification		Modification
	Number	Outstanding		Outstanding		Number	Outstanding		Outstanding
	of	Recorded		Recorded		of	Recorded		Recorded
Troubled Debt Restructurings	Loans	Investment		Investment		Loans	Investment		Investment
	(Dollars in thousands)
Real estate mortgage:
Commercial	4	$	2,889	$	712	1	$	998	$	998
Residential	5	912		912		3	566		10
Commercial:
Asset-based (1)	4	28,947		33,947		—	—		—
Venture capital	5	23,501		23,501		4	15,308		15,308
Other commercial	5	1,487		1,115		5	12,146		2,910
Total	23	$	57,736	$	60,187	13	$	29,018	$	19,226

	Nine Months Ended September 30,
	2018					2017
		Pre-		Post-			Pre-		Post-
		Modification		Modification			Modification		Modification
	Number	Outstanding		Outstanding		Number	Outstanding		Outstanding
	of	Recorded		Recorded		of	Recorded		Recorded
Troubled Debt Restructurings	Loans	Investment		Investment		Loans	Investment		Investment
	(Dollars in thousands)
Real estate mortgage:
Commercial	4	$	2,889	$	712	5	$	2,527	$	2,463
Residential	8	2,616		1,557		8	1,328		489
Real estate construction and land:
Residential	—	—		—		1	362		—
Commercial:
Asset-based (1)	4	28,947		33,947		2	665		665
Venture capital	9	28,737		28,737		9	28,465		28,465
Other commercial	9	13,301		12,929		17	30,153		20,918
Consumer	1	27		27		1	97		97
Total	35	$	76,517	$	77,909	43	$	63,597	$	53,097

_________________________

(1) One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was a restructuring of a loan secured by oil services equipment that was originally restructured in 2015 after being placed on nonaccrual status. The loan has since been extended four times, the last in the fourth quarter of 2017. As part of the current restructuring, additional funds were advanced in exchange for the receipt of additional equipment collateral and a partial personal guaranty.

In the three and nine months ended September 30, 2018, there were no loans restructured in the preceding 12-month period which subsequently defaulted after being restructured. In the three and nine months ended September 30, 2017, there were no loans restructured in the preceding 12-month period which subsequently defaulted after being restructured.

Allowance for Loan and Lease Losses

The following tables present a summary of the activity in the allowance for loan and lease losses on loans and leases held for investment by portfolio segment for the periods indicated:

	Three Months Ended September 30, 2018
				Real Estate
	Real Estate			Construction
	Mortgage			and Land			Commercial			Consumer			Total
	(In thousands)
Allowance for Loan and Lease Losses:
Balance, beginning of period	$	45,467		$	26,210		$	58,806		$	1,656		$	132,139
Charge-offs	(726		)	—			(2,372		)	(210		)	(3,308		)
Recoveries	222			23			1,303			41			1,589
Net (charge-offs) recoveries	(504		)	23			(1,069		)	(169		)	(1,719		)
Provision (negative provision)	1,394			(47		)	9,907			246			11,500
Balance, end of period	$	46,357		$	26,186		$	67,644		$	1,733		$	141,920

	Nine Months Ended September 30, 2018
				Real Estate
	Real Estate			Construction
	Mortgage			and Land		Commercial			Consumer			Total
	(In thousands)
Allowance for Loan and Lease Losses:
Balance, beginning of period	$	40,051		$	13,055	$	84,022		$	2,328		$	139,456
Charge-offs	(8,071		)	—		(25,321		)	(304		)	(33,696		)
Recoveries	1,999			49		7,702			136			9,886
Net (charge-offs) recoveries	(6,072		)	49		(17,619		)	(168		)	(23,810		)
Provision (negative provision)	12,378			13,082		1,241			(427		)	26,274
Balance, end of period	$	46,357		$	26,186	$	67,644		$	1,733		$	141,920
Ending Allowance by
Impairment Methodology:
Individually evaluated for impairment	$	496		$	—	$	20,363		$	—		$	20,859
Collectively evaluated for impairment	$	45,861		$	26,186	$	47,281		$	1,733		$	121,061
Ending Loans and Leases by
Impairment Methodology:
Individually evaluated for impairment	$	44,985		$	5,533	$	79,493		$	—		$	130,011
Collectively evaluated for impairment	7,633,675			1,995,424		7,072,565			398,471			17,100,135
Ending balance	$	7,678,660		$	2,000,957	$	7,152,058		$	398,471		$	17,230,146

	Three Months Ended September 30, 2017
				Real Estate
	Real Estate			Construction								Total			Total
	Mortgage			and Land		Commercial			Consumer			Non-PCI			PCI			Total
	(In thousands)
Allowance for Loan
and Lease Losses:
Balance, beginning of period	$	37,122		$	11,318	$	88,364		$	2,075		$	138,879		$	7,079		$	145,958
Charge-offs	(531		)	—		(4,984		)	(413		)	(5,928		)	(79		)	(6,007		)
Recoveries	36			353		4,447			29			4,865			217			5,082
Net (charge-offs) recoveries	(495		)	353		(537		)	(384		)	(1,063		)	138			(925		)
Provision (negative provision)	(186		)	22		14,366			752			14,954			(381		)	14,573
Balance, end of period	$	36,441		$	11,693	$	102,193		$	2,443		$	152,770		$	6,836		$	159,606

	Nine Months Ended September 30, 2017
				Real Estate
	Real Estate			Construction								Total			Total
	Mortgage			and Land		Commercial			Consumer			Non-PCI			PCI			Total
	(In thousands)
Allowance for Loan
and Lease Losses:
Balance, beginning of period	$	37,765		$	10,045	$	93,853		$	2,092		$	143,755		$	13,483		$	157,238
Charge-offs	(2,217		)	—		(46,965		)	(625		)	(49,807		)	(5,768		)	(55,575		)
Recoveries	286			370		8,848			104			9,608			275			9,883
Net (charge-offs) recoveries	(1,931		)	370		(38,117		)	(521		)	(40,199		)	(5,493		)	(45,692		)
Provision (negative provision)	607			1,278		46,457			872			49,214			(1,154		)	48,060
Balance, end of period	$	36,441		$	11,693	$	102,193		$	2,443		$	152,770		$	6,836		$	159,606
Ending Allowance by
Impairment Methodology:
Individually evaluated for
impairment	$	1,153		$	—	$	15,012		$	17		$	16,182
Collectively evaluated for
impairment	$	35,288		$	11,693	$	87,181		$	2,426		$	136,588
Acquired loans with
deteriorated credit quality															$	6,836
Ending Loans and Leases by
Impairment Methodology:
Individually evaluated for
impairment	$	113,304		$	5,764	$	94,078		$	106		$	213,252
Collectively evaluated for
impairment	6,017,892			1,243,458		7,767,614			385,807			15,414,771
Acquired loans with
deteriorated credit quality															$	62,494
Ending balance	$	6,131,196		$	1,249,222	$	7,861,692		$	385,913		$	15,628,023		$	62,494		$	15,690,517

Allowance for Credit Losses

The allowance for credit losses is the combination of the allowance for loan and lease losses and the reserve for unfunded loan commitments. The reserve for unfunded loan commitments is included within "Accrued interest payable and other liabilities" on the condensed consolidated balance sheets. The following tables present a summary of the activity in the allowance for loan and lease losses and reserve for unfunded loan commitments for the periods indicated:

	Three Months Ended September 30, 2018
	Allowance for			Reserve for		Total
	Loan and			Unfunded Loan		Allowance for
	Lease Losses			Commitments		Credit Losses
	(In thousands)
Balance, beginning of period	$	132,139		$	35,361	$	167,500
Charge-offs	(3,308		)	—		(3,308		)
Recoveries	1,589			—		1,589
Net charge-offs	(1,719		)	—		(1,719		)
Provision	11,500			—		11,500
Balance, end of period	$	141,920		$	35,361	$	177,281

	Nine Months Ended September 30, 2018
	Allowance for			Reserve for		Total
	Loan and			Unfunded Loan		Allowance for
	Lease Losses			Commitments		Credit Losses
	(In thousands)
Balance, beginning of period	$	139,456		$	28,635	$	168,091
Charge-offs	(33,696		)	—		(33,696		)
Recoveries	9,886			—		9,886
Net charge-offs	(23,810		)	—		(23,810		)
Provision	26,274			6,726		33,000
Balance, end of period	$	141,920		$	35,361	$	177,281

	Three Months Ended September 30, 2017
	Non-PCI
	Allowance for			Reserve for					PCI			Total
	Loan and			Unfunded Loan		Allowance for			Allowance for			Allowance for
	Lease Losses			Commitments		Credit Losses			Loan Losses			Credit Losses
	(In thousands)
Balance, beginning of period	$	138,879		$	20,263	$	159,142		$	7,079		$	166,221
Charge-offs	(5,928		)	—		(5,928		)	(79		)	(6,007		)
Recoveries	4,865			—		4,865			217			5,082
Net (charge-offs) recoveries	(1,063		)	—		(1,063		)	138			(925		)
Provision (negative provision)	14,954			546		15,500			(381		)	15,119
Balance, end of period	$	152,770		$	20,809	$	173,579		$	6,836		$	180,415

	Nine Months Ended September 30, 2017
	Non-PCI
	Allowance for			Reserve for					PCI			Total
	Loan and			Unfunded Loan		Allowance for			Allowance for			Allowance for
	Lease Losses			Commitments		Credit Losses			Loan Losses			Credit Losses
	(In thousands)
Balance, beginning of period	$	143,755		$	17,523	$	161,278		$	13,483		$	174,761
Charge-offs	(49,807		)	—		(49,807		)	(5,768		)	(55,575		)
Recoveries	9,608			—		9,608			275			9,883
Net charge-offs	(40,199		)	—		(40,199		)	(5,493		)	(45,692		)
Provision (negative provision)	49,214			3,286		52,500			(1,154		)	51,346
Balance, end of period	$	152,770		$	20,809	$	173,579		$	6,836		$	180,415

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Foreclosed Assets

9 Months Ended

Sep. 30, 2018

Other Real Estate Owned Net Covered and NonCovered Including Foreclosed Assets [Abstract]

Foreclosed Assets

FORECLOSED ASSETS

The following table summarizes foreclosed assets as of the dates indicated:

	September 30,		December 31,
Property Type	2018		2017
	(In thousands)
Construction and land development	$	219	$	219
Multi‑family	1,059		—
Single family residence	953		1,019
Commercial real estate	2,176		64
Total other real estate owned, net	4,407		1,302
Other foreclosed assets	—		27
Total foreclosed assets, net	$	4,407	$	1,329

The following table presents the changes in foreclosed assets, net of the valuation allowance, for the period indicated:

	Foreclosed
	Assets
	(In thousands)
Balance, December 31, 2017	$	1,329
Transfers to foreclosed assets from loans	3,235
Provision for losses	(65		)
Reductions related to sales	(92		)
Balance, September 30, 2018	$	4,407

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Other Assets

9 Months Ended

Sep. 30, 2018

Other Assets [Abstract]

Other Assets

OTHER ASSETS

The following table presents the detail of our other assets as of the dates indicated:

	September 30,		December 31,
Other Assets	2018		2017
	(In thousands)
Cash surrender value of BOLI	$	195,547	$	193,917
Interest receivable	82,980		82,935
Taxes receivable	30,491		98,998
CRA investments	56,396		49,432
LIHTC investments	55,356		39,235
Equity investments without readily determinable fair values	14,731		14,856
Equity investments with readily determinable fair values	6,552		—
Prepaid expenses	19,341		17,800
Other	33,128		43,550
Total other assets	$	494,522	$	540,723

The Company has purchased life insurance policies on certain employees and has also acquired life insurance policies through acquisitions. BOLI is recorded at the amount that can be realized under the insurance contract, which is the cash surrender value. The increase in the cash surrender value each period is recorded to "Noninterest income - other."

The Company makes various investments for CRA investment purposes including, but not limited to, CRA-related loan pool investments, CRA-related equity investments and investments in LIHTC partnerships. The loan pool and other CRA equity investments primarily consist of investments in partnerships which provide affordable housing and participations in loan pools which provide low-cost loans to low and moderate income applicants.

The Company invests as a limited partner in LIHTC partnerships that operate qualified affordable housing projects and generate tax benefits for investors, including federal low income housing tax credits. The partnerships are deemed to be VIEs because they do not have sufficient equity investment at risk and are structured with non-substantive voting rights. We are not the primary beneficiary of the VIEs and do not consolidate them. We amortize the investment in proportion to the allocated tax benefits using the proportional amortization method of accounting and record such benefits net of investment amortization in income tax expense.

Our equity investments without readily determinable fair values include investments in privately held companies and limited partnerships as well as investments in entities from which we issued trust preferred securities. On January 1, 2018, we adopted ASU 2016-01 and ASU 2018-03 which changed the way we account for equity investments without readily determinable fair values previously accounted for using the cost method. Upon adoption, we have elected to measure our equity investments without readily determinable fair values using the measurement alternative.The Company reclassified $1.2 million of equity securities without readily determinable fair values previously included in securities available-for-sale to other assets on our condensed consolidated balance sheet in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated. Carrying values of these investments are adjusted to fair value upon observable transactions for identical or similar investments of the same issuer. During thenine months endedSeptember 30, 2018, we sold a portion ofoneof our equity investments without a readily determinable fair value for an amount in excess of its basis, and consequently increased by$286,000the remaining carrying value of this investment atSeptember 30, 2018. Beginning January 1, 2018, unrealized and realized gains and losses on equity investments without readily determinable fair values are recorded in "Noninterest income - other."

Our equity investments with readily determinable fair values include investments in public companies, often from the exercise of warrants, and publicly-traded mutual funds. The Company reclassified $5.9 million of equity securities with readily determinable fair values previously included in securities available-for-sale to other assets on our condensed consolidated balance sheet in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated. Beginning January 1, 2018, unrealized and realized gains and losses on equity investments with readily determinable fair values are recorded in "Noninterest income - other."

The remaining other assets balance of $33.1 million at September 30, 2018 consists of, among other things, other receivables, equity warrants, and derivative assets.

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Borrowings and Subordinated Debentures

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Borrowings and Subordinated Debentures

BORROWINGS AND SUBORDINATED DEBENTURES

Borrowings

The following table summarizes our borrowings as of the dates indicated:

	September 30, 2018				December 31, 2017
			Weighted				Weighted
			Average				Average
	Amount		Rate		Amount		Rate
	(Dollars in thousands)
Non‑recourse debt	$	166	7.23	%	$	342	6.87	%
FHLB secured advances	1,135,000		2.33	%	332,000		1.41	%
FHLB unsecured overnight advance	143,000		2.30	%	135,000		1.34	%
AFX borrowings	235,000		2.34	%	—		—	%
Total borrowings	$	1,513,166			$	467,342

The non‑recourse debt represents the payment stream of certain equipment leases sold to third parties. The debt is secured by the leased equipment and all interest rates are fixed. As of September 30, 2018, this debt had a weighted average remaining maturity of 1.1 years.

The Bank has established secured and unsecured lines of credit under which it may borrow funds from time to time on a term or overnight basis from the FHLB, the FRBSF, and other financial institutions.

FHLB Secured Line of Credit. The Bank had secured financing capacity with the FHLB as of September 30, 2018 of $3.6 billion, collateralized by a blanket lien on $5.2 billion of certain qualifying loans. As of September 30, 2018, the balance outstanding was a $1.1 billion overnight advance. As of December 31, 2017, the balance outstanding was a $332.0 million overnight advance.

FRBSF Secured Line of Credit. The Bank has a secured line of credit with the FRBSF. As of September 30, 2018, the Bank had secured borrowing capacity of $2.1 billion collateralized by liens covering $2.8 billion of certain qualifying loans. As of September 30, 2018 and December 31, 2017, there were no balances outstanding.

FHLB Unsecured Line of Credit. The Bank has a $143.0 million unsecured line of credit with the FHLB for the purchase of overnight funds, of which $143.0 million was outstanding at September 30, 2018. At December 31, 2017, the balance outstanding was $135.0 million.

Federal Funds Arrangements with Commercial Banks. As of September 30, 2018, the Bank had unsecured lines of credit of $125.0 million with correspondent banks for the purchase of overnight funds, subject to availability of funds. These lines are renewable annually and have no unused commitment fees. As of September 30, 2018 and December 31, 2017, there were no balances outstanding. The Bank is a member of the AFX, through which it may either borrow or lend funds on an overnight or short-term basis with a group of pre-approved commercial banks. The availability of funds changes daily. As of September 30, 2018, the balance outstanding was $235.0 million, which consisted of a $225.0 million overnight borrowing and a $10.0 million one-month borrowing with a maturity date of October 29, 2018. As of December 31, 2017, there was no balance outstanding.

Subordinated Debentures

The following table summarizes the terms of each issuance of subordinated debentures outstanding as of the dates indicated:

	September 30, 2018					December 31, 2017					Date	Maturity	Rate Index
Series	Amount			Rate		Amount			Rate		Issued	Date	(Quarterly Reset)
	(Dollars in thousands)
Trust V	$	10,310		5.43	%	$	10,310		4.70	%	8/15/2003	9/17/2033	3 month LIBOR + 3.10
Trust VI	10,310			5.38	%	10,310			4.64	%	9/3/2003	9/15/2033	3 month LIBOR + 3.05
Trust CII	5,155			5.28	%	5,155			4.55	%	9/17/2003	9/17/2033	3 month LIBOR + 2.95
Trust VII	61,856			5.09	%	61,856			4.13	%	2/5/2004	4/23/2034	3 month LIBOR + 2.75
Trust CIII	20,619			4.02	%	20,619			3.28	%	8/15/2005	9/15/2035	3 month LIBOR + 1.69
Trust FCCI	16,495			3.93	%	16,495			3.19	%	1/25/2007	3/15/2037	3 month LIBOR + 1.60
Trust FCBI	10,310			3.88	%	10,310			3.14	%	9/30/2005	12/15/2035	3 month LIBOR + 1.55
Trust CS 2005-1	82,475			4.28	%	82,475			3.54	%	11/21/2005	12/15/2035	3 month LIBOR + 1.95
Trust CS 2005-2	128,866			4.29	%	128,866			3.33	%	12/14/2005	1/30/2036	3 month LIBOR + 1.95
Trust CS 2006-1	51,545			4.29	%	51,545			3.33	%	2/22/2006	4/30/2036	3 month LIBOR + 1.95
Trust CS 2006-2	51,550			4.29	%	51,550			3.33	%	9/27/2006	10/30/2036	3 month LIBOR + 1.95
Trust CS 2006-3 (1)	29,909			1.69	%	30,986			1.72	%	9/29/2006	10/30/2036	3 month EURIBOR + 2.05
Trust CS 2006-4	16,470			4.29	%	16,470			3.33	%	12/5/2006	1/30/2037	3 month LIBOR + 1.95
Trust CS 2006-5	6,650			4.29	%	6,650			3.33	%	12/19/2006	1/30/2037	3 month LIBOR + 1.95
Trust CS 2007-2	39,177			4.29	%	39,177			3.33	%	6/13/2007	7/30/2037	3 month LIBOR + 1.95
Trust I (2)	—			—	%	6,186			3.64	%	12/10/2004	3/15/2035	3 month LIBOR + 2.05
Trust II (2)	—			—	%	3,093			3.34	%	12/23/2005	3/15/2036	3 month LIBOR + 1.75
Trust III (2)	—			—	%	3,093			3.44	%	6/30/2006	9/18/2036	3 month LIBOR + 1.85
Gross subordinated debentures	541,697					555,146
Unamortized discount (3)	(88,753		)			(92,709		)
Net subordinated debentures	$	452,944				$	462,437

___________________

(1) Denomination is in Euros with a value of €25.8 million.

(2) Acquired in the CUB acquisition on October 20, 2017 and redeemed in the first quarter of 2018.

(3) Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions.

Interest payments made by the Company on subordinated debentures are considered dividend payments under FRB regulations. Bank holding companies, such as PacWest, are required to notify the FRB prior to declaring and paying a dividend during any period in which quarterly and/or cumulative twelve‑month net earnings are insufficient to fund the dividend amount, among other requirements.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Lending Commitments

The Company is a party to financial instruments with off‑balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the condensed consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of involvement that the Company has in particular classes of financial instruments.

The following table presents a summary of the financial instruments described above as of the dates indicated:

	September 30,		December 31,
	2018		2017
	(In thousands)
Loan commitments to extend credit	$	7,055,833	$	6,234,061
Standby letters of credit	335,651		320,063
Total	$	7,391,484	$	6,554,124

Commitments to extend credit are contractual agreements to lend to our customers when customers are in compliance with their contractual credit agreements and when customers have contractual availability to borrow under such agreements. 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 amounts do not necessarily represent future cash requirements. The increase in loan commitments to extend credit is primarily a result of the continued growth of our real estate construction and venture capital portfolios.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. We provide standby letters of credit in conjunction with several of our lending arrangements and property lease obligations. Most guarantees expire within one year from the date of issuance. If a borrower defaults on its commitments subject to any letter of credit issued under these arrangements, we would be required to meet the borrower's financial obligation but would seek repayment of that financial obligation from the borrower. In some cases, borrowers have pledged cash and investment securities as collateral with us under these arrangements.

In addition, the Company invests in low income housing project partnerships, which provide income tax credits, and in small business investment companies that call for capital contributions up to an amount specified in the partnership agreements. As of September 30, 2018 and December 31, 2017, we had commitments to contribute capital to these entities totaling $104.6 million and $62.6 million. We also had commitments to contribute up to an additional $403,000 and $2.5 million to private equity funds at September 30, 2018 and December 31, 2017.

Legal Matters

In the ordinary course of our business, the Company is party to various legal actions, which we believe are incidental to the operation of our business. The outcome of such legal actions and the timing of ultimate resolution are inherently difficult to predict. In the opinion of management, based upon currently available information, any resulting liability, in addition to amounts already accrued, and taking into consideration insurance which may be applicable, would not have a material adverse effect on the Company’s financial statements or operations.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

ASC Topic 820, “Fair Value Measurement,” defines fair value, establishes a framework for measuring fair value including a three‑level valuation hierarchy, and expands disclosures about fair value measurements. Fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date reflecting assumptions that a market participant would use when pricing an asset or liability. The hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows:

• Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets.

• Level 2: Observable inputs other than Level 1, including quoted prices for similar assets and liabilities in active markets, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data, either directly or indirectly, for substantially the full term of the financial instrument. This category generally includes municipal securities, agency residential and commercial MBS, collateralized loan obligations, registered publicly rated private label CMOs, corporate debt securities, SBA securities, and asset-backed securitizations.

• Level 3: Inputs to a valuation methodology that are unobservable, supported by little or no market activity, and significant to the fair value measurement. These valuation methodologies generally include pricing models, discounted cash flow models, or a determination of fair value that requires significant management judgment or estimation. This category also includes observable inputs from a pricing service not corroborated by observable market data, and includes our non-rated private label CMOs, non-rated private label asset-backed securities, and equity warrants.

The Company uses fair value to measure certain assets and liabilities on a recurring basis, primarily securities available‑for‑sale and derivatives. For assets measured at the lower of cost or fair value, the fair value measurement criteria may or may not be met during a reporting period and such measurements are therefore considered “nonrecurring” for purposes of disclosing our fair value measurements. Fair value is used on a nonrecurring basis to adjust carrying values for impaired loans and other real estate owned and also to record impairment on certain assets, such as goodwill, CDI, and other long‑lived assets.

The following tables present information on the assets and liabilities measured and recorded at fair value on a recurring basis as of the dates indicated:

	Fair Value Measurements as of
	September 30, 2018
Measured on a Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Securities available‑for‑sale:
Residential MBS and CMOs:
Agency MBS	$	249,831	$	—	$	249,831	$	—
Agency CMOs	569,605		—		569,605		—
Private label CMOs	110,450		—		97,327		13,123
Municipal securities	1,271,583		—		1,271,583		—
Agency commercial MBS	1,077,005		—		1,077,005		—
U.S. Treasury securities	397,631		397,631		—		—
SBA securities	67,586		—		67,586		—
Asset-backed securities	58,452		—		29,353		29,099
Corporate debt securities	18,190		—		18,190		—
Total securities available-for-sale	3,820,333		397,631		3,380,480		42,222
Equity warrants	4,962		—		—		4,962
Other derivative assets	2,072		—		2,072		—
Equity investments with readily determinable fair values	6,552		6,552		—		—
Total recurring assets	$	3,833,919	$	404,183	$	3,382,552	$	47,184
Derivative liabilities	$	468	$	—	$	468	$	—

	Fair Value Measurements as of
	December 31, 2017
Measured on a Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Securities available‑for‑sale:
Residential MBS and CMOs:
Agency MBS	$	246,274	$	—	$	246,274	$	—
Agency CMOs	275,709		—		275,709		—
Private label CMOs	125,987		—		103,113		22,874
Municipal securities	1,680,068		—		1,680,068		—
Agency commercial MBS	1,163,969		—		1,163,969		—
SBA securities	160,334		—		160,334		—
Asset-backed securities	88,710		—		46,601		42,109
Corporate debt securities	19,295		—		19,295		—
Collateralized loan obligations	7,015		—		7,015		—
Equity investments (1)	7,070		5,922		1,148		—
Total securities available-for-sale	3,774,431		5,922		3,703,526		64,983
Equity warrants	5,161		—		—		5,161
Other derivative assets	1,873		—		1,873		—
Total recurring assets	$	3,781,465	$	5,922	$	3,705,399	$	70,144
Derivative liabilities	$	1,379	$	—	$	1,379	$	—

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

During the nine months endedSeptember 30, 2018, there was a $75,000 transfer from Level 3 equity warrants to Level 1 equity investments with readily determinable fair values measured on a recurring basis.

The following table presents information about quantitative inputs and assumptions used to determine the fair values provided by our third party pricing service for our Level 3 private label CMOs and asset-backed securities available-for-sale measured at fair value on a recurring basis as of the date indicated:

	September 30, 2018
	Private Label CMOs		Asset-Backed Securities
		Weighted		Weighted
	Range	Average	Range	Average
Unobservable Inputs	of Inputs	Input	of Inputs	Input
Voluntary annual prepayment speeds	4.8% - 30.5%	9.4%	5% - 15%	14.2%
Annual default rates	0.0% - 25.3%	2.2%	1% - 2%	1.9%
Loss severity rates	5.2% - 135.5%	47.3%	10% - 60%	55.9%
Discount rates	2.2% - 10.5%	6.2%	3.2% - 4.3%	3.6%

The following table presents information about quantitative inputs and assumptions used in the modified Black-Scholes option pricing model to determine the fair value for our Level 3 equity warrants measured at fair value on a recurring basis as of the date indicated:

	September 30, 2018
	Equity Warrants
	Weighted
	Average
Unobservable Inputs	Input
Volatility	16.3%
Risk-free interest rate	2.9%
Remaining life assumption (in years)	3.6

The following table summarizes activity for our Level 3 private label CMOs available-for-sale, asset-backed securities available-for-sale, and equity warrants measured at fair value on a recurring basis for the period indicated:

	Private			Asset-Backed			Equity
	Label CMOs			Securities			Warrants
	(In thousands)
Balance, December 31, 2017	$	22,874		$	42,109		$	5,161
Total included in earnings	595			(35		)	5,291
Total included in other comprehensive income	(511		)	220			—
Issuances	—			—			557
Salesand dispositions (1)	—			—			(5,972		)
Net settlements	(9,835		)	(13,195		)	—
Transfers to Level 1	—			—			(75		)
Balance, September 30, 2018	$	13,123		$	29,099		$	4,962

______________________

(1) Includes the exercise of warrants that upon exercise become equity securities in public companies. These are often subject to lock-up restrictions that must be met before the equity security can be sold, during which time they are reported as equity investments with readily determinable fair values.

The following tables present assets measured at fair value on a non‑recurring basis as of the dates indicated:

	Fair Value Measurement as of
	September 30, 2018
Measured on a Non‑Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Impaired loans	$	41,103	$	—	$	15,423	$	25,680
OREO	953		—		953		—
Total non-recurring	$	42,056	$	—	$	16,376	$	25,680

	Fair Value Measurement as of
	December 31, 2017
Measured on a Non‑Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Impaired Non‑PCI loans	$	61,095	$	—	$	5,143	$	55,952
Loans held for sale	483,563		—		483,563		—
Total non-recurring	$	544,658	$	—	$	488,706	$	55,952

The following table presents losses recognized on assets measured on a nonrecurring basis for the periods indicated:

	Three Months Ended				Nine Months Ended
Losses on Assets	September 30,				September 30,
Measured on a Non‑Recurring Basis	2018		2017		2018		2017
	(In thousands)
Impaired loans (1)	$	14,347	$	4,427	$	31,351	$	17,895
OREO	—		2,124		65		2,124
Total losses	$	14,347	$	6,551	$	31,416	$	20,019

__________________________

(1) Losses for 2018 periods relate to total loans. Losses for 2017 periods relate to Non-PCI loans.

The following table presents the valuation methodology and unobservable inputs for Level 3 assets measured at fair value on a nonrecurring basis as of the date indicated:

	September 30, 2018
			Valuation	Unobservable		Weighted
Asset	Fair Value		Technique	Inputs	Range	Average
	(In thousands)
Impaired loans	$	12,531	Discounted cash flows	Discount rates	3.75% - 7.75%	6.81%
Impaired loans	6,819		Internal enterprise value methodology	(1)	(1)	(1)
Impaired loans	6,330		Third party appraisals	No discounts
Total non-recurring Level 3	$	25,680

__________________________

(1) In determining the fair value of these loans, we used different factors related to each borrower. These factors are specific to each borrower and a weighted average value or range of values of the unobservable inputs is not meaningful.

ASC Topic 825, “Financial Instruments,” (as amended by ASU 2016-01 and ASU 2018-03) requires disclosure of the estimated fair value of certain financial instruments and the methods and significant assumptions used to estimate such fair values. Additionally, certain financial instruments and all nonfinancial instruments are excluded from the applicable disclosure requirements.

On January 1, 2018, we adopted ASU 2016-01 and ASU 2018-03 which requires the use of the exit price notion when measuring the fair values of financial instruments for disclosure purposes. Starting in the first quarter of 2018, we updated our methodology used to estimate fair values for our loan portfolios to conform to the new requirements.

The following tables present carrying amounts and estimated fair values of certain financial instruments as of the dates indicated:

	September 30, 2018
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and due from banks	$	196,502	$	196,502	$	196,502	$	—	$	—
Interest‑earning deposits in financial institutions	185,284		185,284		185,284		—		—
Securities available‑for‑sale	3,820,333		3,820,333		397,631		3,380,480		42,222
Investment in FHLB stock	31,077		31,077		—		31,077		—
Loans and leases held for investment, net	17,088,226		16,876,611		—		15,423		16,861,188
Equity warrants	4,962		4,962		—		—		4,962
Other derivative assets	2,072		2,072		—		2,072		—
Equity investments with readily determinable fair values	6,552		6,552		6,552		—		—
Financial Liabilities:
Core deposits	15,512,742		15,512,742		—		15,512,742		—
Non-core non-maturity deposits	483,528		483,528		—		483,528		—
Time deposits	1,883,273		1,894,024		—		1,894,024		—
Borrowings	1,513,166		1,513,163		1,503,000		10,163		—
Subordinated debentures	452,944		435,505		—		435,505		—
Derivative liabilities	468		468		—		468		—

	December 31, 2017
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and due from banks	$	233,215	$	233,215	$	233,215	$	—	$	—
Interest‑earning deposits in financial institutions	165,222		165,222		165,222		—		—
Securities available‑for‑sale	3,774,431		3,774,431		5,922		3,703,526		64,983
Investment in FHLB stock	20,790		20,790		—		20,790		—
Loans held for sale	481,100		483,563		—		483,563		—
Loans and leases held for investment, net	16,833,287		17,023,098		—		5,143		17,017,955
Equity warrants	5,161		5,161		—		—		5,161
Other derivative assets	1,873		1,873		—		1,873		—
Financial Liabilities:
Core deposits	15,937,012		15,937,012		—		15,937,012		—
Non-core non-maturity deposits	863,202		863,202		—		863,202		—
Time deposits	2,065,322		2,055,104		—		2,055,104		—
Borrowings	467,342		467,342		467,000		342		—
Subordinated debentures	462,437		444,383		—		444,383		—
Derivative liabilities	1,379		1,379		—		1,379		—

For information regarding the valuation methodologies used to measure our assets recorded at fair value (under ASC Topic 820), and for estimating fair value for financial instruments not recorded at fair value (under ASC Topic 825, as amended by ASU 2016-01 and ASU 2018-03), see Note 1. Nature of Operations and Summary of Significant Accounting Policies, and Note 12. Fair ValueMeasurements, to the Consolidated Financial Statements of the Company's 2017 Annual Report on Form 10-K.

Limitations

Fair value estimates are made at a specific point in time and are based on relevant market information and information about the financial instrument. These estimates do not reflect income taxes or any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a portion of the Company’s financial instruments, fair value estimates are based on what management believes to be reasonable judgments regarding expected future cash flows, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimated fair values are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Since the fair values have been estimated as of September 30, 2018, the amounts that will actually be realized or paid at settlement or maturity of the instruments could be significantly different.

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Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The following table presents the computations of basic and diluted net earnings per share for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Dollars in thousands, except per share data)
Basic Earnings Per Share:
Net earnings	$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Less: Earnings allocated to unvested restricted stock(1)	(1,428		)	(1,348		)	(1,149		)	(3,899		)	(3,239		)
Net earnings allocated to common shares	$	114,859		$	114,387		$	100,317		$	346,399		$	270,542
Weighted-average basic shares and unvested restricted
stock outstanding	123,657			126,082			121,447			125,728			121,405
Less: Weighted-average unvested restricted stock
outstanding	(1,537		)	(1,466		)	(1,394		)	(1,473		)	(1,450		)
Weighted-average basic shares outstanding	122,120			124,616			120,053			124,255			119,955
Basic earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26
Diluted Earnings Per Share:
Net earnings allocated to common shares	$	114,859		$	114,387		$	100,317		$	346,399		$	270,542
Weighted-average basic shares outstanding	122,120			124,616			120,053			124,255			119,955
Diluted earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26

________________________

(1) Represents cash dividends paid to holders of unvested restricted stock, net of forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

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Revenue From Contracts With Customers

9 Months Ended

Sep. 30, 2018

Revenue From Contracts With Customers [Abstract]

Revenue from Contracts with Customers

REVENUE FROM CONTRACTS WITH CUSTOMERS

The Company adopted Topic 606 Revenue from Contracts with Customers effective as of January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. Revenue from contracts with customers in the scope of Topic 606 is measured based on the consideration specified in the contract with a customer, and excludes amounts collected on behalf of third parties. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company's performance obligations are typically satisfied as services are rendered and payment is generally collected at the time services are rendered, or on a monthly, quarterly or annual basis. The Company had no material unsatisfied performance obligations as of September 30, 2018.

In certain cases, other parties are involved with providing products and services to our customers. If the Company is a principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue. Rebates, waivers, and reversals are recorded as a reduction of revenue either when the revenue is recognized by the Company or at the time the rebate, waiver, or reversal is earned by the customer.

The Company has elected the following practical expedients: (1) we do not disclose information about remaining performance obligations that have original expected durations of one year or less; and (2) we do not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the Company transfers the goods or services and when the customer pays for that good or service will be one year or less.

Nature of Goods and Services

Substantially all of the Company's revenue, such as interest income on loans, investment securities, and interest-earning deposits in financial institutions, is specifically out-of-scope of Topic 606. For the revenue that is in-scope, the following is a description of principal activities, separated by the timing of revenue recognition, from which the Company generates its revenue from contracts with customers:

• Revenue earned at a point in time.Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, NSF fees, and credit and debit card interchange fees. Revenue is generally derived from transactional information accumulated by our systems and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer's transaction. The Company is the principal in each of these contracts with the exception of credit and debit card interchange fees, in which case the Company is acting as the agent and records revenue net of expenses paid to the principal.

• Revenue earned over time.The Company earns certain revenue from contracts with customers monthly. Examples of this type of revenue are deposit account service fees, investment management fees, merchant referral services, MasterCard marketing incentives and safe deposit box fees. Account service charges, management fees and referral fees are recognized on a monthly basis while any transaction-based revenue is recorded as the activity occurs. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems. Revenue is recorded in the same period as the related transactions occur or services are rendered to the customer.

Disaggregation of Revenue

The following table presents interest income and noninterest income, the components of total revenue, as disclosed in the condensed consolidated statements of earnings and the related amounts which are from contracts with customers within the scope of Topic 606. As illustrated here, substantially all of our revenue is specifically excluded from the scope of Topic 606.

	Three Months Ended September 30, 2018				Nine Months Ended September 30, 2018
	Total		Revenue from		Total		Revenue from
	Recorded		Contracts with		Recorded		Contracts with
	Revenue		Customers		Revenue		Customers
	(In thousands)
Total interest income	$	292,642	$	—	$	858,931	$	—
Noninterest income:
Service charges on deposit accounts	3,979		3,979		12,418		12,418
Other commissions and fees	12,397		4,767		34,429		14,519
Leased equipment income	9,120		—		28,497		—
Gain on sale of loans	—		—		4,675		—
Gain on sale of securities	826		—		7,390		—
Other income	10,590		444		27,700		1,341
Total noninterest income	36,912		9,190		115,109		28,278
Total revenue	$	329,554	$	9,190	$	974,040	$	28,278

The following table presents revenue from contracts with customers based on the timing of revenue recognition for the period indicated:

	Three Months Ended		Nine Months Ended
	September 30, 2018		September 30, 2018
	(In thousands)
Products and services transferred at a point in time	$	4,604	$	14,195
Products and services transferred over time	4,586		14,083
Total revenue from contracts with customers	$	9,190	$	28,278

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers:

	September 30, 2018
	(In thousands)
Receivables, which are included in "Other assets"	$	1,701
Contract assets, which are included in "Other assets"	$	—
Contract liabilities, which are included in "Interest payable and other liabilities"	$	654

Contract liabilities relate to advance consideration received from customers for which revenue is recognized over the life of the contract. The change in contract liabilities for the nine months endedSeptember 30, 2018 due to revenue recognized that was included in the contract liability balance at the beginning of the period was $98,000.

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

STOCK-BASED COMPENSATION

The Company’s 2017 Stock Incentive Plan, or the 2017 Plan, permits stock-based compensation awards to officers, directors, employees, and consultants. As of September 30, 2018, the 2017 Plan authorized grants of stock‑based compensation instruments to purchase or issue up to 4,000,000 shares of Company common stock. As of September 30, 2018, there were 3,138,923 shares available for grant under the 2017 Plan. Though frozen for new issuances, certain awards issued under the 2003 Stock Incentive Plan, or the 2003 Plan, remain outstanding.

Restricted Stock

Restricted stock amortization totaled $8.1 million, $6.9 million, and $6.5 million for the three months ended September 30, 2018, June 30, 2018, and September 30, 2017, and $22.3 million and $19.6 million for the nine months ended September 30, 2018 and 2017. Such amounts are included in "Compensation expense" on the condensed consolidated statements of earnings. The amount of unrecognized compensation expense related to unvested TRSAs and PRSUs as of September 30, 2018 totaled $59.3 million.

Time-Based Restricted Stock Awards

At September 30, 2018, there were 1,529,273 shares of unvested TRSAs outstanding pursuant to the Company's 2003 and 2017 Stock Incentive Plans (the "Plans"). The TRSAs generally vest ratably over a service period of three or four years from the date of the grant or immediately upon death of an employee. Compensation expense related to TRSAs is based on the fair value of the underlying stock on the award date and is recognized over the vesting period using the straight‑line method.

Performance-Based Restricted Stock Units

At September 30, 2018, there were 325,741 unvested PRSUs granted. The PRSUs will vest only if performance goals with respect to certain financial metrics are met over a three-year performance period. The PRSUs are not considered issued and outstanding under either the 2017 Plan or the 2003 Plan until they vest. PRSUs are granted and initially expensed based on a target number. The number of shares that will ultimately vest based on actual performance will range from zero to a maximum of either 150% or 200% of target. Compensation expense related to PRSUs is based on the fair value of the underlying stock on the award date and is amortized over the vesting period using the straight-line method unless it is determined that: (1) attainment of the financial metrics is less than probable, in which case a portion of the amortization is suspended, or (2) attainment of the financial metrics is improbable, in which case a portion of the previously recognized amortization is reversed and also suspended. If it is determined that attainment of a financial measure higher than target is probable, the amortization will increase to up to 150% or 200% of the target amortization amount. Annual PRSU expense may vary during the three-year performance period based upon changes in management's estimate of the number of shares that may ultimately vest. In the case where the performance target for the PRSU is based on a market condition (such as total shareholder return), the amortization is neither reversed nor suspended if it is subsequently determined that the attainment of the performance target is less than probable or improbable.

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Recently Issued Accounting Standards

9 Months Ended

Sep. 30, 2018

Recently Issued Accounting Standards [Abstract]

Recently Issued Accounting Standards

RECENTLY ISSUED ACCOUNTING STANDARDS

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which, among other things, requires lessees to recognize most leases on-balance sheet, which will result in an increase in their reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. ASU 2016-02 supersedes Topic 840, Leases, and is effective for annual and interim periods in fiscal years beginning after December 15, 2018. There have been further amendments, including practical expedients, with the issuance of ASU 2018-01, “Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842” in January 2018, ASU 2018-10, “Codification Improvements to Topic 842, Leases” in July 2018, and ASU 2018-11, "Leases (Topic 842): Targeted Improvements" in July 2018.

The amendments in ASU 2018-11 provide an optional transition method when adopting Topic 842, which allows companies to elect not to adjust their comparative period financial information and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, effectively applying the requirements of the new standard prospectively. The Company will adopt the standard effective January 1, 2019 and will elect the optional transition method and recognize a cumulative-effect adjustment to retained earnings upon adoption. In addition, the Company will be electing a number of practical expedients permitted under the new standard including carrying forward the historical lease classification and accounting for non-lease and lease components together as a single lease component, and not recognizing a right-of-use asset and lease liability for short-term leases.

The primary impact of the new standard to the Company relates to leased branches and office space which are currently accounted for as operating leases. The Company is on track with its implementation plan which includes a new software solution and changes to our processes, procedures, and internal controls. While the ultimate quantitative impact of adoption will not be known until adoption, based on the lease population as of September 30, 2018, the Company anticipates recording lease right-of-use assets and liabilities of approximately $120 to $140 million on its consolidated balance sheet, with no material impact to its consolidated statements of earnings. However, the ultimate impact of adopting ASU 2016-02 will depend on the Company’s lease population and discount rates as of the adoption date. From a lessor perspective, the Company anticipates recognizing more sales-type leases that are currently accounted for as direct financing leases. The change in the definition of initial direct costs to include only incremental direct costs will also result in an acceleration of certain operating costs. Given the limited changes to lessor accounting, the Company does not expect material changes to its consolidated financial statements for the lessor accounting changes.

In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which significantly changes the way entities recognize credit losses and impairment of financial assets recorded at amortized cost. Currently, the credit loss and impairment model for loans and leases is based on incurred losses, and investments are recognized as impaired when there is no longer an assumption that future cash flows will be collected in full under the originally contracted terms. Under the new current expected credit loss ("CECL") model, the standard requires immediate recognition of estimated credit losses expected to occur over the remaining life of the asset. The forward-looking concept of CECL to estimate future credit losses will broaden the range of data to consider including past and current events and conditions along with reasonable and supportable forecasts that may affect expected collectability. The new standard will add new disclosure requirements and impact the Company’s processes and internal controls over financial reporting.

The Company has established a multidisciplinary project team and implementation plan, selected a software solution, developed a conceptual framework, and is engaged in the implementation phase of the project. The Company, with the assistance of a third party adviser, continues to work on: (1) developing a new expected loss model with supportable assumptions, (2) identifying data, reporting, and drafting future disclosures, (3) assessing updates to accounting policies, and (4) documenting new processes and controls.

The Company expects to begin testing and sensitivity analysis on its initial modeling assumptions and results in the first quarter of 2019. ASU 2016-13 is effective for interim and annual periods in fiscal years beginning after December 15, 2019, with earlier adoption permitted. The Company plans to adopt this standard on January 1, 2020. Entities are required to use a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted (modified-retrospective approach). A prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the adoption date. The new standard will be significant to the policies, processes, and methodology used to determine credit losses; however, the Company has not yet determined the quantitative effect ASU 2016-13 will have on its consolidated financial position and results of operations.

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which intends to simplify goodwill impairment testing by eliminating the second step of the analysis under which the implied fair value of goodwill is determined as if the reporting unit were being acquired in a business combination. ASU 2017-04 instead requires entities to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for any amount by which the carrying amount exceeds the reporting unit's fair value, to the extent that the loss recognized does not exceed the amount of goodwill allocated to that reporting unit. ASU 2017-04 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2017-04 to have a material impact on its consolidated financial position or results of operations.

In June 2018, the FASB issued ASU 2018-07, “Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,” which simplifies the accounting for share-based payments granted to nonemployees for goods and services by aligning with the requirements for share-based payments granted to employees. The Company does not expect the adoption of ASU 2018-07 to have a material impact on its consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements,” which changes the fair value measurement disclosure requirements of ASC 820. ASU 2018-13 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2018-13 to have a material impact on its consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract (a consensus of the FASB Emerging Issues Task Force)," which aligns the requirements for capitalizing implementation costs in a cloud computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. The new guidance also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. ASU 2018-15 is effective for the Company on January 1, 2020 and the Company has the option to adopt the new standard either prospectively to eligible costs incurred on or after the date this guidance is first applied or retrospectively. Early adoption is permitted. The Company does not expect ASU 2018-15 to have a material impact on its consolidated financial position or results of operations.

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Subsequent Events

9 Months Ended

Sep. 30, 2018

Subsequent Events [Abstract]

Subsequent Events

SUBSEQUENT EVENTS

Common Stock Dividends

On November 1, 2018, the Company announced that the Board of Directors had declared a quarterly cash dividend of $0.60 per common share. The cash dividend is payable on November 30, 2018 to stockholders of record at the close of business on November 20, 2018.

The Company has evaluated events that have occurred subsequent to September 30, 2018 and have concluded there are no other subsequent events that would require recognition in the accompanying consolidated financial statements.

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Organization Organization (Policies)

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Our accounting policies are described in Note 1. Nature of Operations and Summary of Significant Accounting Policies, of our audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission ("Form 10-K"). Updates to our significant accounting policies described below reflect the impact of the adoption of ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.”

Investment Securities

Our significant accounting policy for investment securities applied to both debt and equity securities in prior periods. Effective January 1, 2018, upon the adoption of ASUs 2016-01 and 2018-03, our significant accounting policy for investment securities applies only to debt securities.

Equity Investments

Investments in common or preferred stock that are not publicly traded and certain investments in limited partnerships are considered equity investments that do not have a readily determinable fair value. If we have the ability to significantly influence the operating and financial policies of the investee, the investment is accounted for pursuant to the equity method of accounting. This is generally presumed to exist when we own between 20% and 50% of a corporation, or when we own greater than 5% of a limited partnership or similarly structured entity. Our equity investment carrying values are included in other assets and our share of earnings and losses in equity method investees is included in "Noninterest income - other" on the condensed consolidated statements of earnings. Prior to January 1, 2018, if we did not have significant influence over the investee, the cost method was used to accountfor the equity interest.

Effective January 1, 2018 with the adoption of ASU 2016-01, our accounting treatment for equity investments differs for those with and without readily determinable fair values. Equity investments with readily determinable fair values are recorded at fair value with changes in fair value recorded in “Noninterest income - other.” For equity investments without readily determinable fair values we have elected the “measurement alternative,” and therefore carry these investments at cost, less impairment (if any), plus or minus changes in observable prices. On a quarterly basis, we review our equity investments without readily determinable fair values for impairment. We consider a number of qualitative factors such as whether there is a significant deterioration in earnings performance, credit rating, asset quality, or business prospects of the investee in determining if impairment exists. If the investment is considered impaired, an impairment loss equal to the amount by which the carrying value exceeds its fair value is recorded through a charge to earnings. The impairment loss may be reversed in a subsequent period if there are observable transactions for the identical or similar investment of the same issuer at a higher amount than the carrying amount that was established when the impairment was recognized. Impairment as well as upward or downward adjustments resulting from observable price changes in orderly transactions for identical or similar investments are included in “Noninterest income - other.”

Realized gains or losses resulting from the sale of equity investments are calculated using the specific identification method and are included in "Noninterest income - other."

Comprehensive Income

Comprehensive income consists of net earnings and net unrealized gains (losses) on debt securities available‑for‑sale, net, and is presented in the consolidated statements of comprehensive income.

Recently Issued Accounting Standards

ORGANIZATION    

PacWest Bancorp, a Delaware corporation, is a bank holding company registered under the BHCA, with our corporate headquarters located in Beverly Hills, California. Our principal business is to serve as the holding company for our wholly-owned subsidiary, Pacific Western Bank. References to "Pacific Western" or the "Bank" refer to Pacific Western Bank together with its wholly-owned subsidiaries. References to "we," "us," or the "Company" refer to PacWest Bancorp together with its subsidiaries on a consolidated basis. When we refer to "PacWest" or to the "holding company," we are referring to PacWest Bancorp, the parent company, on a stand-alone basis.

We are focused on relationship-based business banking to small, middle-market and venture-backed businesses nationwide. At September 30, 2018, the Bank offers a broad range of loan and lease and deposit products and services through 74 full-service branches located throughout the State of California, one branch located in Durham, North Carolina, and numerous loan production offices located in cities across the country. Community Banking provides lending and comprehensive deposit and treasury management services to small and medium-sized businesses conducted primarily through our California-based branch offices. We offer additional products and services through our National Lending and Venture Banking groups. National Lending provides asset-based, equipment, real estate, and security cash flow loans and treasury management services to established middle-market businesses on a national basis. Venture Banking offers a comprehensive suite of financial services focused on entrepreneurial businesses and their venture capital and private equity investors, with offices located in key innovation hubs across the United States. In addition, we provide investment advisory and asset management services to select clients through Square 1 Asset Management, Inc., a wholly-owned subsidiary of the Bank and a SEC-registered investment adviser.

We generate our revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities, and fees received in connection with deposit services, extending credit and other services offered, including foreign exchange services. Our major operating expenses are compensation, occupancy, general operating expenses, and the interest paid by the Bank on deposits and borrowings.

We have completed 29 acquisitions from May 1, 2000 through September 30, 2018. Our acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates. See Note 3. Acquisitions, for more information about the CUB acquisition.

El Dorado Savings Bank Merger Announcement

On September 11, 2018, PacWest entered into a definitive agreement and plan of merger (the “Agreement”) whereby PacWest will acquire El Dorado Savings Bank, F.S.B. (“El Dorado”) in a transaction valued at approximately $466.7 million.

El Dorado, headquartered in Placerville, California, is a federally chartered savings bank founded in 1958, with approximately $2.2 billion in assets and 35 branches located primarily in eight Northern California counties and two Northern Nevada counties. In connection with the transaction, El Dorado will be merged into the Bank.

The transaction, which was approved by the PacWest and El Dorado boards of directors, is expected to close in the first quarter of 2019 and is subject to customary closing conditions, including obtaining approval by bank regulatory authorities and El Dorado’s shareholders.

Significant Accounting Policies

Our accounting policies are described in Note 1. Nature of Operations and Summary of Significant Accounting Policies, of our audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission ("Form 10-K"). Updates to our significant accounting policies described below reflect the impact of the adoption of ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.”

Investment Securities

Our significant accounting policy for investment securities applied to both debt and equity securities in prior periods. Effective January 1, 2018, upon the adoption of ASUs 2016-01 and 2018-03, our significant accounting policy for investment securities applies only to debt securities.

Equity Investments

Investments in common or preferred stock that are not publicly traded and certain investments in limited partnerships are considered equity investments that do not have a readily determinable fair value. If we have the ability to significantly influence the operating and financial policies of the investee, the investment is accounted for pursuant to the equity method of accounting. This is generally presumed to exist when we own between 20% and 50% of a corporation, or when we own greater than 5% of a limited partnership or similarly structured entity. Our equity investment carrying values are included in other assets and our share of earnings and losses in equity method investees is included in "Noninterest income - other" on the condensed consolidated statements of earnings. Prior to January 1, 2018, if we did not have significant influence over the investee, the cost method was used to accountfor the equity interest.

Effective January 1, 2018 with the adoption of ASU 2016-01, our accounting treatment for equity investments differs for those with and without readily determinable fair values. Equity investments with readily determinable fair values are recorded at fair value with changes in fair value recorded in “Noninterest income - other.” For equity investments without readily determinable fair values we have elected the “measurement alternative,” and therefore carry these investments at cost, less impairment (if any), plus or minus changes in observable prices. On a quarterly basis, we review our equity investments without readily determinable fair values for impairment. We consider a number of qualitative factors such as whether there is a significant deterioration in earnings performance, credit rating, asset quality, or business prospects of the investee in determining if impairment exists. If the investment is considered impaired, an impairment loss equal to the amount by which the carrying value exceeds its fair value is recorded through a charge to earnings. The impairment loss may be reversed in a subsequent period if there are observable transactions for the identical or similar investment of the same issuer at a higher amount than the carrying amount that was established when the impairment was recognized. Impairment as well as upward or downward adjustments resulting from observable price changes in orderly transactions for identical or similar investments are included in “Noninterest income - other.”

Realized gains or losses resulting from the sale of equity investments are calculated using the specific identification method and are included in "Noninterest income - other."

Comprehensive Income

Comprehensive income consists of net earnings and net unrealized gains (losses) on debt securities available‑for‑sale, net, and is presented in the consolidated statements of comprehensive income.

Accounting Standards Adopted in 2018

Effective January 1, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" and ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 contained a number of changes which are applicable to the Company including the following: (1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; (2) allows equity investments without readily determinable fair values to be measured at cost less impairment, if any, plus or minus changes in observable prices (referred to as the "measurement alternative"); and (3) changes certain presentation and disclosure requirements for financial instruments, including using the exit price notion when measuring the fair value of financial instruments (see Note 11. Fair Value Measurements). ASU 2018-03 also clarified certain aspects of the guidance issued in ASU 2016-01, including requiring a prospective transition approach for equity investments without readily determinable fair value in which the measurement alternative is applied.

ASU 2016-01 does not apply to investments accounted for using the equity method, investments in consolidated subsidiaries, FHLB stock, and investments in low income housing tax credit projects. Upon adoption of ASU 2016-01, the Company recorded a transition adjustment to reclassify $529,000 in net unrealized gains from accumulated other comprehensive income ("AOCI") to retained earnings. The ASU also eliminated the requirement to classify equity investments into different categories such as “Available-for-sale.” The adoption of this ASU may result in more earnings volatility as changes in fair value of certain equity investments will now be recorded in the statement of earnings as opposed to AOCI.

Effective January 1, 2018, the Company early-adopted ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The TCJA required deferred tax assets and liabilities to be re-measured at its enactment date for the effect of the change in the federal corporate tax rate. This process resulted in "stranded tax effects" in AOCI for deferred tax asset or liabilities which were established with an offsetting amount in AOCI. ASU 2018-02 allows for a reclassification of the stranded tax effects resulting from the enactment of the TCJA from AOCI to retained earnings. The Company elected to reclassify its stranded tax effects of $6.665 million from AOCI to retained earnings effective January 1, 2018, while no other income tax effects related to the application of the TCJA were reclassified.

Effective January 1, 2018, the Company adopted ASU 2014-09, "Revenue Recognition (Topic 606): Revenue from Contracts with Customers." ASU 2014-09 supersedes Topic 605, "Revenue Recognition" and requires an entity to recognize revenue at an amount that reflects the consideration to which it expects to be entitled to in exchange for the transfer of promised goods or services to customers.

Substantially all of the Company's revenue is interest income on loans, investment securities, and deposits at other financial institutions which are specifically outside the scope of ASU 2014-09. ASU 2014-09 applies primarily to certain noninterest income items in the Company's condensed consolidated statement of earnings. The Company adopted ASU 2014-09 as of January 1, 2018 using the cumulative effect transition method, which resulted in no adjustment to retained earnings and no material impact on the Company's consolidated financial position, results of operations, or cash flows. The Company did make minor changes to accounting operations and internal controls as part of adopting this new standard. See Note 13. Revenue From Contracts With Customers for further details.

Effective January 1, 2018, the Company adopted ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments." Upon adoption, the Company applied the retrospective transition method to each period presented. ASU 2016-15 addressed eight issues related to the statement of cash flows, the most relevant to the Company being the classification of proceeds from the settlement of BOLI policies. As the Company classified proceeds from the settlement of BOLI policies in the manner required by ASU 2016-15 in the prior periods presented, there was no change to the Company's consolidated financial position, results of operations, or cash flows for both current and prior periods upon adoption.

Effective January 1, 2018, the Company adopted ASU 2016-18, "Statement of Cash Flows (Topic 230): Restricted Cash." Upon adoption, the Company applied the retrospective transition method to each period presented. As the Company does not present restricted cash as a separate line in the statement of financial position, there is no change to the presentation of cash on the statement of cash flows. The nature and amount of our restricted cash is shown in Note 2. Restricted Cash Balances.

Effective January 1, 2018, the Company adopted ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business." ASU 2017-01 provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses.The Company had no acquisitions or purchases of components of a business in the first three quarters of 2018, thus, the impact of adopting the new standard had no impact on the Company's consolidated financial position, results of operations, or cash flows.

Effective January 1, 2018, the Company adopted ASU 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting." ASU 2017-09 provided clarification of what constitutes a modification of a share-based payment award. The Company did not modify any share-based payment awards in the first three quarters of 2018, thus, the impact of adopting the new standard had no impact on the Company's consolidated financial position, results of operations, or cash flows.

RECENTLY ISSUED ACCOUNTING STANDARDS

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which, among other things, requires lessees to recognize most leases on-balance sheet, which will result in an increase in their reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. ASU 2016-02 supersedes Topic 840, Leases, and is effective for annual and interim periods in fiscal years beginning after December 15, 2018. There have been further amendments, including practical expedients, with the issuance of ASU 2018-01, “Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842” in January 2018, ASU 2018-10, “Codification Improvements to Topic 842, Leases” in July 2018, and ASU 2018-11, "Leases (Topic 842): Targeted Improvements" in July 2018.

The amendments in ASU 2018-11 provide an optional transition method when adopting Topic 842, which allows companies to elect not to adjust their comparative period financial information and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, effectively applying the requirements of the new standard prospectively. The Company will adopt the standard effective January 1, 2019 and will elect the optional transition method and recognize a cumulative-effect adjustment to retained earnings upon adoption. In addition, the Company will be electing a number of practical expedients permitted under the new standard including carrying forward the historical lease classification and accounting for non-lease and lease components together as a single lease component, and not recognizing a right-of-use asset and lease liability for short-term leases.

The primary impact of the new standard to the Company relates to leased branches and office space which are currently accounted for as operating leases. The Company is on track with its implementation plan which includes a new software solution and changes to our processes, procedures, and internal controls. While the ultimate quantitative impact of adoption will not be known until adoption, based on the lease population as of September 30, 2018, the Company anticipates recording lease right-of-use assets and liabilities of approximately $120 to $140 million on its consolidated balance sheet, with no material impact to its consolidated statements of earnings. However, the ultimate impact of adopting ASU 2016-02 will depend on the Company’s lease population and discount rates as of the adoption date. From a lessor perspective, the Company anticipates recognizing more sales-type leases that are currently accounted for as direct financing leases. The change in the definition of initial direct costs to include only incremental direct costs will also result in an acceleration of certain operating costs. Given the limited changes to lessor accounting, the Company does not expect material changes to its consolidated financial statements for the lessor accounting changes.

In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which significantly changes the way entities recognize credit losses and impairment of financial assets recorded at amortized cost. Currently, the credit loss and impairment model for loans and leases is based on incurred losses, and investments are recognized as impaired when there is no longer an assumption that future cash flows will be collected in full under the originally contracted terms. Under the new current expected credit loss ("CECL") model, the standard requires immediate recognition of estimated credit losses expected to occur over the remaining life of the asset. The forward-looking concept of CECL to estimate future credit losses will broaden the range of data to consider including past and current events and conditions along with reasonable and supportable forecasts that may affect expected collectability. The new standard will add new disclosure requirements and impact the Company’s processes and internal controls over financial reporting.

The Company has established a multidisciplinary project team and implementation plan, selected a software solution, developed a conceptual framework, and is engaged in the implementation phase of the project. The Company, with the assistance of a third party adviser, continues to work on: (1) developing a new expected loss model with supportable assumptions, (2) identifying data, reporting, and drafting future disclosures, (3) assessing updates to accounting policies, and (4) documenting new processes and controls.

The Company expects to begin testing and sensitivity analysis on its initial modeling assumptions and results in the first quarter of 2019. ASU 2016-13 is effective for interim and annual periods in fiscal years beginning after December 15, 2019, with earlier adoption permitted. The Company plans to adopt this standard on January 1, 2020. Entities are required to use a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted (modified-retrospective approach). A prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the adoption date. The new standard will be significant to the policies, processes, and methodology used to determine credit losses; however, the Company has not yet determined the quantitative effect ASU 2016-13 will have on its consolidated financial position and results of operations.

In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which intends to simplify goodwill impairment testing by eliminating the second step of the analysis under which the implied fair value of goodwill is determined as if the reporting unit were being acquired in a business combination. ASU 2017-04 instead requires entities to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for any amount by which the carrying amount exceeds the reporting unit's fair value, to the extent that the loss recognized does not exceed the amount of goodwill allocated to that reporting unit. ASU 2017-04 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2017-04 to have a material impact on its consolidated financial position or results of operations.

In June 2018, the FASB issued ASU 2018-07, “Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,” which simplifies the accounting for share-based payments granted to nonemployees for goods and services by aligning with the requirements for share-based payments granted to employees. The Company does not expect the adoption of ASU 2018-07 to have a material impact on its consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements,” which changes the fair value measurement disclosure requirements of ASC 820. ASU 2018-13 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2018-13 to have a material impact on its consolidated financial position or results of operations.

In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract (a consensus of the FASB Emerging Issues Task Force)," which aligns the requirements for capitalizing implementation costs in a cloud computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. The new guidance also prescribes the balance sheet, income statement, and cash flow classification of the capitalized implementation costs and related amortization expense, and requires additional quantitative and qualitative disclosures. ASU 2018-15 is effective for the Company on January 1, 2020 and the Company has the option to adopt the new standard either prospectively to eligible costs incurred on or after the date this guidance is first applied or retrospectively. Early adoption is permitted. The Company does not expect ASU 2018-15 to have a material impact on its consolidated financial position or results of operations.

Basis of Presentation

Basis of Presentation

Our interim condensed consolidated financial statements are prepared in accordance with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, certain disclosures accompanying annual consolidated financial statements are omitted. In the opinion of management, all significant intercompany accounts and transactions have been eliminated and adjustments, consisting solely of normal recurring accruals and considered necessary for the fair presentation of financial statements for the interim periods, have been included. The current period's results of operations are not necessarily indicative of the results that ultimately may be achieved for the year. The interim condensed consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Form 10-K.

Use of Estimates

Use of Estimates

We have made a number of estimates and assumptions related to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period to prepare these condensed consolidated financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates. Material estimates subject to change in the near term include, among other items, the allowance for credit losses (the combination of the allowance for loan and lease losses and the reserve for unfunded loan commitments), the carrying value of intangible assets, the realization of deferred tax assets, and the fair value estimates of assets acquired and liabilities assumed in acquisitions. These estimates may be adjusted as more current information becomes available, and any adjustment may be significant.

The allowance for loan and lease losses (“ALLL”) represents management’s estimate of probable credit losses inherent in the loan portfolio as of the balance sheet date. During the second quarter of 2018, the Company changed its ALLL methodology due to the growth and increased complexity of the loan portfolio. The new ALLL methodology included three primary changes: the quantitative component now employs a probability of default/loss given default ("PD/LGD") methodology; the loan segmentation groups our loan portfolio into 21 loan segments with similar risk characteristics (as opposed to 34 loan segments used under the previous methodology); and the historical range of loan performance history (often referred to as the look-back period) was lengthened by one year. The methodology for assessing individually impaired loans did not change under the new ALLL methodology. The ALLL methodology used to derive qualitative adjustments based on other internal or external factors was updated to align with the new PD/LGD methodology being applied to estimate the quantitative general allowance for unimpaired loans. As a result, the composition of the ALLL changed as the quantitative component increased and the qualitative component decreased as the new quantitative methodology now encompasses more information, such as the longer look-back period, that previously required a qualitative adjustment as part of determining the total ALLL estimate. These changes in the ALLL methodology did not result in material changes to management's overall estimate of the ALLL.

Reclassifications

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period’s presentation format. In our loan and allowance tables, we realigned our commercial loan portfolio classes and subclasses to better reflect and report our lending, especially in light of the fourth quarter of 2017 cash flow loan sale and the exiting of the origination operations related to general, technology, and healthcare cash flow loans. Prior to the realignment, our commercial portfolio classes were: (1) asset-based, (2) venture capital, (3) cash flow, and (4) equipment finance. After the realignment, our commercial portfolio classes are (1) asset-based (which includes equipment finance), (2) venture capital, and (3) other commercial (which includes retained cash flow). All of the loan and allowance tables, both current period and prior periods, reflect this realignment.

Prior to January 1, 2018, our credit quality disclosures were only for Non-PCI loans and leases. As our gross PCI loan portfolio reduced to less than 0.4% of total loans as of the end of 2017, beginning in 2018 the credit quality disclosures reflect our entire loan and lease portfolio. Accordingly, for the credit quality tables in Note 6. Loans and Leases, amounts related to the 2018 periods are for total loans and leases, while amounts related to the 2017 periods are for Non-PCI loans and leases only.

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Other Assets Other Assets (Policies)

9 Months Ended

Sep. 30, 2018

Other Assets [Abstract]

Life Settlement Contracts, Disclosure

The Company has purchased life insurance policies on certain employees and has also acquired life insurance policies through acquisitions. BOLI is recorded at the amount that can be realized under the insurance contract, which is the cash surrender value. The increase in the cash surrender value each period is recorded to "Noninterest income - other."

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Fair Value Measurements Fair Value Disclosures (Policies)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurement, Policy

FAIR VALUE MEASUREMENTS

ASC Topic 820, “Fair Value Measurement,” defines fair value, establishes a framework for measuring fair value including a three‑level valuation hierarchy, and expands disclosures about fair value measurements. Fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date reflecting assumptions that a market participant would use when pricing an asset or liability. The hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows:

• Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets.

• Level 2: Observable inputs other than Level 1, including quoted prices for similar assets and liabilities in active markets, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data, either directly or indirectly, for substantially the full term of the financial instrument. This category generally includes municipal securities, agency residential and commercial MBS, collateralized loan obligations, registered publicly rated private label CMOs, corporate debt securities, SBA securities, and asset-backed securitizations.

• Level 3: Inputs to a valuation methodology that are unobservable, supported by little or no market activity, and significant to the fair value measurement. These valuation methodologies generally include pricing models, discounted cash flow models, or a determination of fair value that requires significant management judgment or estimation. This category also includes observable inputs from a pricing service not corroborated by observable market data, and includes our non-rated private label CMOs, non-rated private label asset-backed securities, and equity warrants.

The Company uses fair value to measure certain assets and liabilities on a recurring basis, primarily securities available‑for‑sale and derivatives. For assets measured at the lower of cost or fair value, the fair value measurement criteria may or may not be met during a reporting period and such measurements are therefore considered “nonrecurring” for purposes of disclosing our fair value measurements. Fair value is used on a nonrecurring basis to adjust carrying values for impaired loans and other real estate owned and also to record impairment on certain assets, such as goodwill, CDI, and other long‑lived assets.

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Revenue From Contracts With Customers Revenue From Contracts With Customers (Policies)

9 Months Ended

Sep. 30, 2018

Revenue From Contracts With Customers [Abstract]

Revenue From Contract With Customers, Policy

The Company adopted Topic 606 Revenue from Contracts with Customers effective as of January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. Revenue from contracts with customers in the scope of Topic 606 is measured based on the consideration specified in the contract with a customer, and excludes amounts collected on behalf of third parties. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company's performance obligations are typically satisfied as services are rendered and payment is generally collected at the time services are rendered, or on a monthly, quarterly or annual basis. The Company had no material unsatisfied performance obligations as of September 30, 2018.

In certain cases, other parties are involved with providing products and services to our customers. If the Company is a principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue. Rebates, waivers, and reversals are recorded as a reduction of revenue either when the revenue is recognized by the Company or at the time the rebate, waiver, or reversal is earned by the customer.

The Company has elected the following practical expedients: (1) we do not disclose information about remaining performance obligations that have original expected durations of one year or less; and (2) we do not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the Company transfers the goods or services and when the customer pays for that good or service will be one year or less.

Nature of Goods and Services

Substantially all of the Company's revenue, such as interest income on loans, investment securities, and interest-earning deposits in financial institutions, is specifically out-of-scope of Topic 606. For the revenue that is in-scope, the following is a description of principal activities, separated by the timing of revenue recognition, from which the Company generates its revenue from contracts with customers:

• Revenue earned at a point in time.Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, NSF fees, and credit and debit card interchange fees. Revenue is generally derived from transactional information accumulated by our systems and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer's transaction. The Company is the principal in each of these contracts with the exception of credit and debit card interchange fees, in which case the Company is acting as the agent and records revenue net of expenses paid to the principal.

• Revenue earned over time.The Company earns certain revenue from contracts with customers monthly. Examples of this type of revenue are deposit account service fees, investment management fees, merchant referral services, MasterCard marketing incentives and safe deposit box fees. Account service charges, management fees and referral fees are recognized on a monthly basis while any transaction-based revenue is recorded as the activity occurs. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems. Revenue is recorded in the same period as the related transactions occur or services are rendered to the customer.

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Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets disclosure

The following table presents the changes in CDI and CRI and the related accumulated amortization for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(In thousands)
Gross Amount of CDI and CRI:
Balance, beginning of period	$	119,497		$	119,497		$	64,187		$	119,497		$	64,187
Fully amortized portion	—			—			(2,190		)	—			(2,190		)
Balance, end of period	119,497			119,497			61,997			119,497			61,997
Accumulated Amortization:
Balance, beginning of period	(51,804		)	(46,217		)	(33,950		)	(39,871		)	(27,821		)
Amortization	(5,587		)	(5,587		)	(3,049		)	(17,520		)	(9,178		)
Fully amortized portion	—			—			2,190			—			2,190
Balance, end of period	(57,391		)	(51,804		)	(34,809		)	(57,391		)	(34,809		)
Net CDI and CRI, end of period	$	62,106		$	67,693		$	27,188		$	62,106		$	27,188

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale securities reconciliation

The following table presents amortized cost, gross unrealized gains and losses, and fair values of securities available-for-sale as of the dates indicated:

	September 30, 2018									December 31, 2017
			Gross		Gross							Gross		Gross
	Amortized		Unrealized		Unrealized			Fair		Amortized		Unrealized		Unrealized			Fair
Security Type	Cost		Gains		Losses			Value		Cost		Gains		Losses			Value
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	251,150	$	1,971	$	(3,290	)	$	249,831	$	243,375	$	3,743	$	(844	)	$	246,274
Agency CMOs	583,062		220		(13,677		)	569,605		277,638		968		(2,897		)	275,709
Private label CMOs	110,353		2,699		(2,602		)	110,450		122,816		3,813		(642		)	125,987
Municipal securities	1,272,501		10,974		(11,892		)	1,271,583		1,627,707		53,700		(1,339		)	1,680,068
Agency commercial MBS	1,117,749		—		(40,744		)	1,077,005		1,169,969		2,758		(8,758		)	1,163,969
U.S. Treasury securities	400,591		—		(2,960		)	397,631		—		—		—			—
SBA securities	69,999		—		(2,413		)	67,586		160,214		695		(575		)	160,334
Asset-backed securities	59,322		18		(888		)	58,452		89,425		159		(874		)	88,710
Corporate debt securities	17,000		1,190		—			18,190		17,000		2,295		—			19,295
Collateralized loan obligations	—		—		—			—		6,960		55		—			7,015
Equity investments (1)	—		—		—			—		6,421		779		(130		)	7,070
Total	$	3,881,727	$	17,072	$	(78,466	)	$	3,820,333	$	3,721,525	$	68,965	$	(16,059	)	$	3,774,431

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

Unrealized losses on investment securities

The following tables present the gross unrealized losses and fair values of securities available-for-sale that were in unrealized loss positions, for which other-than-temporary impairments have not been recognized in earnings, as of the dates indicated:

	September 30, 2018
	Less Than 12 Months					12 Months or More					Total
			Gross					Gross					Gross
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Security Type	Value		Losses			Value		Losses			Value		Losses
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	76,238	$	(1,332	)	$	51,861	$	(1,958	)	$	128,099	$	(3,290	)
Agency CMOs	401,795		(6,418		)	140,997		(7,259		)	542,792		(13,677		)
Private label CMOs	46,713		(1,101		)	34,654		(1,501		)	81,367		(2,602		)
Municipal securities	436,012		(8,743		)	55,402		(3,149		)	491,414		(11,892		)
Agency commercial MBS	784,452		(26,454		)	292,553		(14,290		)	1,077,005		(40,744		)
U.S. Treasury securities	397,631		(2,960		)	—		—			397,631		(2,960		)
SBA securities	32,867		(1,143		)	34,719		(1,270		)	67,586		(2,413		)
Asset-backed securities	20,815		(147		)	35,278		(741		)	56,093		(888		)
Total	$	2,196,523	$	(48,298	)	$	645,464	$	(30,168	)	$	2,841,987	$	(78,466	)

	December 31, 2017
	Less Than 12 Months					12 Months or More					Total
			Gross					Gross					Gross
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Security Type	Value		Losses			Value		Losses			Value		Losses
	(In thousands)
Residential MBS and CMOs:
Agency MBS	$	44,795	$	(311	)	$	26,010	$	(533	)	$	70,805	$	(844	)
Agency CMOs	163,014		(2,452		)	20,928		(445		)	183,942		(2,897		)
Private label CMOs	50,521		(500		)	5,035		(142		)	55,556		(642		)
Municipal securities	67,936		(365		)	32,326		(974		)	100,262		(1,339		)
Agency commercial MBS	579,373		(3,777		)	129,060		(4,981		)	708,433		(8,758		)
SBA securities	74,904		(575		)	—		—			74,904		(575		)
Asset-backed securities	45,198		(818		)	10,473		(56		)	55,671		(874		)
Equity investments (1)	1,039		(130		)	—		—			1,039		(130		)
Total	$	1,026,780	$	(8,928	)	$	223,832	$	(7,131	)	$	1,250,612	$	(16,059	)

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

Investments classified by contractual maturity date

The following table presents the contractual maturities of our securities available-for-sale portfolio based on amortized cost and carrying value as of the date indicated:

	September 30, 2018
	Amortized		Fair
Maturities	Cost		Value
	(In thousands)
Due in one year or less	$	39,300	$	39,272
Due after one year through five years	716,172		707,368
Due after five years through ten years	970,758		937,317
Due after ten years	2,155,497		2,136,376
Total securities available-for-sale	$	3,881,727	$	3,820,333

Investment income

The following table presents the composition of our interest income on investment securities for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,		June 30,		September 30,		September 30,
	2018		2018		2017		2018		2017
	(In thousands)
Taxable interest	$	17,618	$	17,106	$	13,576	$	49,323	$	39,257
Non-taxable interest	10,127		10,276		10,795		31,510		31,926
Dividend income	316		348		391		1,096		1,307
Total interest income on investment securities	$	28,061	$	27,730	$	24,762	$	81,929	$	72,490

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Loans and Leases (Tables)

9 Months Ended

Sep. 30, 2018

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of composition of loans portfolio

The following table summarizes the composition of our loans and leases held for investment as of the dates indicated:

	September 30, 2018			December 31, 2017
	Total			Non-PCI						Total
	Loans			Loans			PCI			Loans
	and Leases			and Leases			Loans			and Leases
	(In thousands)
Real estate mortgage	$	7,695,182		$	7,815,355		$	53,658		$	7,869,013
Real estate construction and land	2,026,645			1,611,287			—			1,611,287
Commercial	7,175,310			7,137,978			4,158			7,142,136
Consumer	398,452			409,551			234			409,785
Total gross loans and leases held for investment	17,295,589			16,974,171			58,050			17,032,221
Deferred fees, net	(65,443		)	(59,464		)	(14		)	(59,478		)
Total loans and leases held for investment,
net of deferred fees	17,230,146			16,914,707			58,036			16,972,743
Allowance for loan and lease losses	(141,920		)	(133,012		)	(6,444		)	(139,456		)
Total loans and leases held for investment, net	$	17,088,226		$	16,781,695		$	51,592		$	16,833,287

Delinquent loans in loan portfolio

The following tables present an aging analysis of our loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated:

	September 30, 2018
	30 - 89		90 or More
	Days		Days		Total
	Past Due		Past Due		Past Due		Current		Total
	(In thousands)
Real estate mortgage:
Commercial	$	2,221	$	8,949	$	11,170	$	4,921,653	$	4,932,823
Residential	5,647		445		6,092		2,739,745		2,745,837
Total real estate mortgage	7,868		9,394		17,262		7,661,398		7,678,660
Real estate construction and land:
Commercial	—		—		—		854,346		854,346
Residential	8,498		—		8,498		1,138,113		1,146,611
Total real estate construction and land	8,498		—		8,498		1,992,459		2,000,957
Commercial:
Asset-based	—		655		655		3,221,656		3,222,311
Venture capital	1,028		497		1,525		2,030,370		2,031,895
Other commercial	222		3,724		3,946		1,893,906		1,897,852
Total commercial	1,250		4,876		6,126		7,145,932		7,152,058
Consumer	605		45		650		397,821		398,471
Total	$	18,221	$	14,315	$	32,536	$	17,197,610	$	17,230,146

	December 31, 2017 (1)
	30 - 89		90 or More
	Days		Days		Total
	Past Due		Past Due		Past Due		Current		Total
	(In thousands)
Real estate mortgage:
Commercial	$	29,070	$	9,107	$	38,177	$	5,323,310	$	5,361,487
Residential	6,999		2,022		9,021		2,428,483		2,437,504
Total real estate mortgage	36,069		11,129		47,198		7,751,793		7,798,991
Real estate construction and land:
Commercial	—		—		—		769,075		769,075
Residential	2,081		—		2,081		820,073		822,154
Total real estate construction and land	2,081		—		2,081		1,589,148		1,591,229
Commercial:
Asset-based	344		690		1,034		2,923,837		2,924,871
Venture capital	6,533		760		7,293		2,115,418		2,122,711
Other commercial	2,846		1,586		4,432		2,062,906		2,067,338
Total commercial	9,723		3,036		12,759		7,102,161		7,114,920
Consumer	562		—		562		409,005		409,567
Total (1)	$	48,435	$	14,165	$	62,600	$	16,852,107	$	16,914,707

________________________

(1) Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

Schedule of non accrual and performing restructured impaired financing receivables

The following table presents our nonaccrual and performing loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated:

	September 30, 2018						December 31, 2017 (1)
	Nonaccrual		Performing		Total		Nonaccrual		Performing		Total
	(In thousands)
Real estate mortgage:
Commercial	$	29,723	$	4,903,100	$	4,932,823	$	65,563	$	5,295,924	$	5,361,487
Residential	3,259		2,742,578		2,745,837		3,350		2,434,154		2,437,504
Total real estate mortgage	32,982		7,645,678		7,678,660		68,913		7,730,078		7,798,991
Real estate construction and land:
Commercial	—		854,346		854,346		—		769,075		769,075
Residential	—		1,146,611		1,146,611		—		822,154		822,154
Total real estate construction and land	—		2,000,957		2,000,957		—		1,591,229		1,591,229
Commercial:
Asset-based	34,619		3,187,692		3,222,311		33,553		2,891,318		2,924,871
Venture capital	35,520		1,996,375		2,031,895		29,424		2,093,287		2,122,711
Other commercial	9,579		1,888,273		1,897,852		23,874		2,043,464		2,067,338
Total commercial	79,718		7,072,340		7,152,058		86,851		7,028,069		7,114,920
Consumer	272		398,199		398,471		20		409,547		409,567
Total	$	112,972	$	17,117,174	$	17,230,146	$	155,784	$	16,758,923	$	16,914,707

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

The following table presents the composition of our impaired loans and leases held for investment, net of deferred fees, by portfolio segment as of the dates indicated:

	September 30, 2018						December 31, 2017 (1)
					Total						Total
	Nonaccrual				Impaired		Nonaccrual				Impaired
	Loans				Loans		Loans				Loans
	and		Performing		and		and		Performing		and
	Leases		TDRs		Leases		Leases		TDRs		Leases
	(In thousands)
Real estate mortgage	$	32,982	$	15,296	$	48,278	$	68,913	$	47,560	$	116,473
Real estate construction and land	—		5,533		5,533		—		5,690		5,690
Commercial	79,718		1,166		80,884		86,851		3,488		90,339
Consumer	272		111		383		20		100		120
Total	$	112,972	$	22,106	$	135,078	$	155,784	$	56,838	$	212,622

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

CV of loans held for investment by class by performing and nonperforming

The following table presents the credit risk rating categories for loans and leases held for investment, net of deferred fees, by portfolio segment and class as of the dates indicated. Classified loans and leases are those with a credit risk rating of either substandard or doubtful.

	September 30, 2018
	Classified		Special Mention		Pass		Total
	(In thousands)
Real estate mortgage:
Commercial	$	64,574	$	140,611	$	4,727,638	$	4,932,823
Residential	11,254		12,036		2,722,547		2,745,837
Total real estate mortgage	75,828		152,647		7,450,185		7,678,660
Real estate construction and land:
Commercial	442		3,833		850,071		854,346
Residential	—		24,645		1,121,966		1,146,611
Total real estate construction and land	442		28,478		1,972,037		2,000,957
Commercial:
Asset-based	42,960		64,778		3,114,573		3,222,311
Venture capital	47,230		65,295		1,919,370		2,031,895
Other commercial	93,564		47,164		1,757,124		1,897,852
Total commercial	183,754		177,237		6,791,067		7,152,058
Consumer	435		1,696		396,340		398,471
Total	$	260,459	$	360,058	$	16,609,629	$	17,230,146

	December 31, 2017 (1)
	Classified		Special Mention		Pass		Total
	(In thousands)
Real estate mortgage:
Commercial	$	93,795	$	122,488	$	5,145,204	$	5,361,487
Residential	8,425		4,582		2,424,497		2,437,504
Total real estate mortgage	102,220		127,070		7,569,701		7,798,991
Real estate construction and land:
Commercial	—		—		769,075		769,075
Residential	—		619		821,535		822,154
Total real estate construction and land	—		619		1,590,610		1,591,229
Commercial:
Asset-based	51,000		37,256		2,836,615		2,924,871
Venture capital	49,671		114,210		1,958,830		2,122,711
Other commercial	75,251		21,883		1,970,204		2,067,338
Total commercial	175,922		173,349		6,765,649		7,114,920
Consumer	263		1,130		408,174		409,567
Total	$	278,405	$	302,168	$	16,334,134	$	16,914,707

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

Impaired financing receivables, average balances and interest income recognized

The following tables present information regarding our impaired loans and leases held for investment, net of deferred fees, by portfolio segment and class as of and for the dates indicated:

	September 30, 2018						December 31, 2017 (1)
			Unpaid						Unpaid
	Recorded		Principal		Related		Recorded		Principal		Related
Impaired Loans and Leases	Investment		Balance		Allowance		Investment		Balance		Allowance
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	1,682	$	225	$	15,750	$	16,548	$	628
Residential	2,495		2,536		271		2,787		2,957		342
Commercial:
Venture capital	34,515		36,149		19,003		16,565		17,203		4,267
Other commercial	1,360		1,361		1,360		20,404		29,951		8,368
Consumer	—		—		—		100		100		16
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	36,087	$	54,497			$	93,827	$	105,923
Residential	7,915		10,172				4,109		4,481
Real estate construction and land:
Commercial	5,533		5,537				5,690		5,689
Commercial:
Asset-based	34,618		40,085				33,553		54,911
Venture capital	1,421		26,853				14,534		40,029
Other commercial	8,970		28,343				5,283		9,351
Consumer	383		547				20		93
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	48,278	$	68,887	$	496	$	116,473	$	129,909	$	970
Real estate construction and land	5,533		5,537		—		5,690		5,689		—
Commercial	80,884		132,791		20,363		90,339		151,445		12,635
Consumer	383		547		—		120		193		16
Total	$	135,078	$	207,762	$	20,859	$	212,622	$	287,236	$	13,621

________________________

(1)    Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

	Three Months Ended September 30,
	2018				2017
	Weighted		Interest		Weighted		Interest
	Average		Income		Average		Income
Impaired Loans and Leases	Balance(1)		Recognized		Balance(1)		Recognized
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	18	$	14,716	$	214
Residential	2,494		21		3,074		14
Commercial:
Venture capital	28,322		—		18,298		—
Other commercial	1,360		—		33,486		31
Consumer	—		—		106		2
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	34,155	$	129	$	92,183	$	635
Residential	7,906		45		3,670		15
Real estate construction and land:
Commercial	5,533		95		5,764		74
Commercial:
Asset-based	34,618		—		31,086		—
Venture capital	1,421		—		2,647		—
Other commercial	8,108		25		3,695		40
Consumer	383		2		296		—
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	46,336	$	213	$	113,643	$	878
Real estate construction and land	5,533		95		5,764		74
Commercial	73,829		25		89,212		71
Consumer	383		2		402		2
Total	$	126,081	$	335	$	209,021	$	1,025

_________________________

(1) For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

	Nine Months Ended September 30,
	2018				2017
	Weighted		Interest		Weighted		Interest
	Average		Income		Average		Income
Impaired Loans and Leases	Balance(1)		Recognized		Balance(1)		Recognized
	(In thousands)
With An Allowance Recorded:
Real estate mortgage:
Commercial	$	1,781	$	55	$	14,716	$	634
Residential	2,494		62		3,074		41
Commercial:
Venture capital	17,459		—		9,621		—
Other commercial	688		—		33,193		88
Consumer	—		—		106		6
With No Related Allowance Recorded:
Real estate mortgage:
Commercial	$	32,098	$	376	$	90,631	$	1,924
Residential	7,845		132		3,650		44
Real estate construction and land:
Commercial	5,533		283		5,764		220
Commercial:
Asset-based	34,618		—		30,682		—
Venture capital	1,330		—		1,922		—
Other commercial	7,417		70		3,044		68
Consumer	373		6		296		—
Total Loans and Leases With
and Without an Allowance Recorded:
Real estate mortgage	$	44,218	$	625	$	112,071	$	2,643
Real estate construction and land	5,533		283		5,764		220
Commercial	61,512		70		78,462		156
Consumer	373		6		402		6
Total	$	111,636	$	984	$	196,699	$	3,025

_________________________

(1) For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

Troubled debt restructurings on financing receivables

The following table presents our troubled debt restructurings of loans held for investment by portfolio segment and class for the periods indicated:

	Three Months Ended September 30,
	2018					2017
		Pre-		Post-			Pre-		Post-
		Modification		Modification			Modification		Modification
	Number	Outstanding		Outstanding		Number	Outstanding		Outstanding
	of	Recorded		Recorded		of	Recorded		Recorded
Troubled Debt Restructurings	Loans	Investment		Investment		Loans	Investment		Investment
	(Dollars in thousands)
Real estate mortgage:
Commercial	4	$	2,889	$	712	1	$	998	$	998
Residential	5	912		912		3	566		10
Commercial:
Asset-based (1)	4	28,947		33,947		—	—		—
Venture capital	5	23,501		23,501		4	15,308		15,308
Other commercial	5	1,487		1,115		5	12,146		2,910
Total	23	$	57,736	$	60,187	13	$	29,018	$	19,226

	Nine Months Ended September 30,
	2018					2017
		Pre-		Post-			Pre-		Post-
		Modification		Modification			Modification		Modification
	Number	Outstanding		Outstanding		Number	Outstanding		Outstanding
	of	Recorded		Recorded		of	Recorded		Recorded
Troubled Debt Restructurings	Loans	Investment		Investment		Loans	Investment		Investment
	(Dollars in thousands)
Real estate mortgage:
Commercial	4	$	2,889	$	712	5	$	2,527	$	2,463
Residential	8	2,616		1,557		8	1,328		489
Real estate construction and land:
Residential	—	—		—		1	362		—
Commercial:
Asset-based (1)	4	28,947		33,947		2	665		665
Venture capital	9	28,737		28,737		9	28,465		28,465
Other commercial	9	13,301		12,929		17	30,153		20,918
Consumer	1	27		27		1	97		97
Total	35	$	76,517	$	77,909	43	$	63,597	$	53,097

_________________________

(1) One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was a restructuring of a loan secured by oil services equipment that was originally restructured in 2015 after being placed on nonaccrual status. The loan has since been extended four times, the last in the fourth quarter of 2017. As part of the current restructuring, additional funds were advanced in exchange for the receipt of additional equipment collateral and a partial personal guaranty.

In the three and nine months ended September 30, 2018, there were no loans restructured in the preceding 12-month period which subsequently defaulted after being restructured. In the three and nine months ended September 30, 2017, there were no loans restructured in the preceding 12-month period which subsequently defaulted after being restructured.

Allowance for credit losses on financing receivables

The following tables present a summary of the activity in the allowance for loan and lease losses on loans and leases held for investment by portfolio segment for the periods indicated:

	Three Months Ended September 30, 2018
				Real Estate
	Real Estate			Construction
	Mortgage			and Land			Commercial			Consumer			Total
	(In thousands)
Allowance for Loan and Lease Losses:
Balance, beginning of period	$	45,467		$	26,210		$	58,806		$	1,656		$	132,139
Charge-offs	(726		)	—			(2,372		)	(210		)	(3,308		)
Recoveries	222			23			1,303			41			1,589
Net (charge-offs) recoveries	(504		)	23			(1,069		)	(169		)	(1,719		)
Provision (negative provision)	1,394			(47		)	9,907			246			11,500
Balance, end of period	$	46,357		$	26,186		$	67,644		$	1,733		$	141,920

	Nine Months Ended September 30, 2018
				Real Estate
	Real Estate			Construction
	Mortgage			and Land		Commercial			Consumer			Total
	(In thousands)
Allowance for Loan and Lease Losses:
Balance, beginning of period	$	40,051		$	13,055	$	84,022		$	2,328		$	139,456
Charge-offs	(8,071		)	—		(25,321		)	(304		)	(33,696		)
Recoveries	1,999			49		7,702			136			9,886
Net (charge-offs) recoveries	(6,072		)	49		(17,619		)	(168		)	(23,810		)
Provision (negative provision)	12,378			13,082		1,241			(427		)	26,274
Balance, end of period	$	46,357		$	26,186	$	67,644		$	1,733		$	141,920
Ending Allowance by
Impairment Methodology:
Individually evaluated for impairment	$	496		$	—	$	20,363		$	—		$	20,859
Collectively evaluated for impairment	$	45,861		$	26,186	$	47,281		$	1,733		$	121,061
Ending Loans and Leases by
Impairment Methodology:
Individually evaluated for impairment	$	44,985		$	5,533	$	79,493		$	—		$	130,011
Collectively evaluated for impairment	7,633,675			1,995,424		7,072,565			398,471			17,100,135
Ending balance	$	7,678,660		$	2,000,957	$	7,152,058		$	398,471		$	17,230,146

	Three Months Ended September 30, 2017
				Real Estate
	Real Estate			Construction								Total			Total
	Mortgage			and Land		Commercial			Consumer			Non-PCI			PCI			Total
	(In thousands)
Allowance for Loan
and Lease Losses:
Balance, beginning of period	$	37,122		$	11,318	$	88,364		$	2,075		$	138,879		$	7,079		$	145,958
Charge-offs	(531		)	—		(4,984		)	(413		)	(5,928		)	(79		)	(6,007		)
Recoveries	36			353		4,447			29			4,865			217			5,082
Net (charge-offs) recoveries	(495		)	353		(537		)	(384		)	(1,063		)	138			(925		)
Provision (negative provision)	(186		)	22		14,366			752			14,954			(381		)	14,573
Balance, end of period	$	36,441		$	11,693	$	102,193		$	2,443		$	152,770		$	6,836		$	159,606

	Nine Months Ended September 30, 2017
				Real Estate
	Real Estate			Construction								Total			Total
	Mortgage			and Land		Commercial			Consumer			Non-PCI			PCI			Total
	(In thousands)
Allowance for Loan
and Lease Losses:
Balance, beginning of period	$	37,765		$	10,045	$	93,853		$	2,092		$	143,755		$	13,483		$	157,238
Charge-offs	(2,217		)	—		(46,965		)	(625		)	(49,807		)	(5,768		)	(55,575		)
Recoveries	286			370		8,848			104			9,608			275			9,883
Net (charge-offs) recoveries	(1,931		)	370		(38,117		)	(521		)	(40,199		)	(5,493		)	(45,692		)
Provision (negative provision)	607			1,278		46,457			872			49,214			(1,154		)	48,060
Balance, end of period	$	36,441		$	11,693	$	102,193		$	2,443		$	152,770		$	6,836		$	159,606
Ending Allowance by
Impairment Methodology:
Individually evaluated for
impairment	$	1,153		$	—	$	15,012		$	17		$	16,182
Collectively evaluated for
impairment	$	35,288		$	11,693	$	87,181		$	2,426		$	136,588
Acquired loans with
deteriorated credit quality															$	6,836
Ending Loans and Leases by
Impairment Methodology:
Individually evaluated for
impairment	$	113,304		$	5,764	$	94,078		$	106		$	213,252
Collectively evaluated for
impairment	6,017,892			1,243,458		7,767,614			385,807			15,414,771
Acquired loans with
deteriorated credit quality															$	62,494
Ending balance	$	6,131,196		$	1,249,222	$	7,861,692		$	385,913		$	15,628,023		$	62,494		$	15,690,517

The following tables present a summary of the activity in the allowance for loan and lease losses and reserve for unfunded loan commitments for the periods indicated:

	Three Months Ended September 30, 2018
	Allowance for			Reserve for		Total
	Loan and			Unfunded Loan		Allowance for
	Lease Losses			Commitments		Credit Losses
	(In thousands)
Balance, beginning of period	$	132,139		$	35,361	$	167,500
Charge-offs	(3,308		)	—		(3,308		)
Recoveries	1,589			—		1,589
Net charge-offs	(1,719		)	—		(1,719		)
Provision	11,500			—		11,500
Balance, end of period	$	141,920		$	35,361	$	177,281

	Nine Months Ended September 30, 2018
	Allowance for			Reserve for		Total
	Loan and			Unfunded Loan		Allowance for
	Lease Losses			Commitments		Credit Losses
	(In thousands)
Balance, beginning of period	$	139,456		$	28,635	$	168,091
Charge-offs	(33,696		)	—		(33,696		)
Recoveries	9,886			—		9,886
Net charge-offs	(23,810		)	—		(23,810		)
Provision	26,274			6,726		33,000
Balance, end of period	$	141,920		$	35,361	$	177,281

	Three Months Ended September 30, 2017
	Non-PCI
	Allowance for			Reserve for					PCI			Total
	Loan and			Unfunded Loan		Allowance for			Allowance for			Allowance for
	Lease Losses			Commitments		Credit Losses			Loan Losses			Credit Losses
	(In thousands)
Balance, beginning of period	$	138,879		$	20,263	$	159,142		$	7,079		$	166,221
Charge-offs	(5,928		)	—		(5,928		)	(79		)	(6,007		)
Recoveries	4,865			—		4,865			217			5,082
Net (charge-offs) recoveries	(1,063		)	—		(1,063		)	138			(925		)
Provision (negative provision)	14,954			546		15,500			(381		)	15,119
Balance, end of period	$	152,770		$	20,809	$	173,579		$	6,836		$	180,415

	Nine Months Ended September 30, 2017
	Non-PCI
	Allowance for			Reserve for					PCI			Total
	Loan and			Unfunded Loan		Allowance for			Allowance for			Allowance for
	Lease Losses			Commitments		Credit Losses			Loan Losses			Credit Losses
	(In thousands)
Balance, beginning of period	$	143,755		$	17,523	$	161,278		$	13,483		$	174,761
Charge-offs	(49,807		)	—		(49,807		)	(5,768		)	(55,575		)
Recoveries	9,608			—		9,608			275			9,883
Net charge-offs	(40,199		)	—		(40,199		)	(5,493		)	(45,692		)
Provision (negative provision)	49,214			3,286		52,500			(1,154		)	51,346
Balance, end of period	$	152,770		$	20,809	$	173,579		$	6,836		$	180,415

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Foreclosed Assets (Tables)

9 Months Ended

Sep. 30, 2018

Other Real Estate Owned Net Covered and NonCovered Including Foreclosed Assets [Abstract]

Other real estate and foreclosed assets

The following table summarizes foreclosed assets as of the dates indicated:

	September 30,		December 31,
Property Type	2018		2017
	(In thousands)
Construction and land development	$	219	$	219
Multi‑family	1,059		—
Single family residence	953		1,019
Commercial real estate	2,176		64
Total other real estate owned, net	4,407		1,302
Other foreclosed assets	—		27
Total foreclosed assets, net	$	4,407	$	1,329

Other foreclosed assets rollforward

The following table presents the changes in foreclosed assets, net of the valuation allowance, for the period indicated:

	Foreclosed
	Assets
	(In thousands)
Balance, December 31, 2017	$	1,329
Transfers to foreclosed assets from loans	3,235
Provision for losses	(65		)
Reductions related to sales	(92		)
Balance, September 30, 2018	$	4,407

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Other Assets (Tables)

9 Months Ended

Sep. 30, 2018

Other Assets [Abstract]

Schedule of Other Assets

The following table presents the detail of our other assets as of the dates indicated:

	September 30,		December 31,
Other Assets	2018		2017
	(In thousands)
Cash surrender value of BOLI	$	195,547	$	193,917
Interest receivable	82,980		82,935
Taxes receivable	30,491		98,998
CRA investments	56,396		49,432
LIHTC investments	55,356		39,235
Equity investments without readily determinable fair values	14,731		14,856
Equity investments with readily determinable fair values	6,552		—
Prepaid expenses	19,341		17,800
Other	33,128		43,550
Total other assets	$	494,522	$	540,723

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Borrowings and Subordinated Debentures (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of debt

The following table summarizes our borrowings as of the dates indicated:

	September 30, 2018				December 31, 2017
			Weighted				Weighted
			Average				Average
	Amount		Rate		Amount		Rate
	(Dollars in thousands)
Non‑recourse debt	$	166	7.23	%	$	342	6.87	%
FHLB secured advances	1,135,000		2.33	%	332,000		1.41	%
FHLB unsecured overnight advance	143,000		2.30	%	135,000		1.34	%
AFX borrowings	235,000		2.34	%	—		—	%
Total borrowings	$	1,513,166			$	467,342

Borrowings subordinated debentures and brokered deposits disclosure

The following table summarizes the terms of each issuance of subordinated debentures outstanding as of the dates indicated:

	September 30, 2018					December 31, 2017					Date	Maturity	Rate Index
Series	Amount			Rate		Amount			Rate		Issued	Date	(Quarterly Reset)
	(Dollars in thousands)
Trust V	$	10,310		5.43	%	$	10,310		4.70	%	8/15/2003	9/17/2033	3 month LIBOR + 3.10
Trust VI	10,310			5.38	%	10,310			4.64	%	9/3/2003	9/15/2033	3 month LIBOR + 3.05
Trust CII	5,155			5.28	%	5,155			4.55	%	9/17/2003	9/17/2033	3 month LIBOR + 2.95
Trust VII	61,856			5.09	%	61,856			4.13	%	2/5/2004	4/23/2034	3 month LIBOR + 2.75
Trust CIII	20,619			4.02	%	20,619			3.28	%	8/15/2005	9/15/2035	3 month LIBOR + 1.69
Trust FCCI	16,495			3.93	%	16,495			3.19	%	1/25/2007	3/15/2037	3 month LIBOR + 1.60
Trust FCBI	10,310			3.88	%	10,310			3.14	%	9/30/2005	12/15/2035	3 month LIBOR + 1.55
Trust CS 2005-1	82,475			4.28	%	82,475			3.54	%	11/21/2005	12/15/2035	3 month LIBOR + 1.95
Trust CS 2005-2	128,866			4.29	%	128,866			3.33	%	12/14/2005	1/30/2036	3 month LIBOR + 1.95
Trust CS 2006-1	51,545			4.29	%	51,545			3.33	%	2/22/2006	4/30/2036	3 month LIBOR + 1.95
Trust CS 2006-2	51,550			4.29	%	51,550			3.33	%	9/27/2006	10/30/2036	3 month LIBOR + 1.95
Trust CS 2006-3 (1)	29,909			1.69	%	30,986			1.72	%	9/29/2006	10/30/2036	3 month EURIBOR + 2.05
Trust CS 2006-4	16,470			4.29	%	16,470			3.33	%	12/5/2006	1/30/2037	3 month LIBOR + 1.95
Trust CS 2006-5	6,650			4.29	%	6,650			3.33	%	12/19/2006	1/30/2037	3 month LIBOR + 1.95
Trust CS 2007-2	39,177			4.29	%	39,177			3.33	%	6/13/2007	7/30/2037	3 month LIBOR + 1.95
Trust I (2)	—			—	%	6,186			3.64	%	12/10/2004	3/15/2035	3 month LIBOR + 2.05
Trust II (2)	—			—	%	3,093			3.34	%	12/23/2005	3/15/2036	3 month LIBOR + 1.75
Trust III (2)	—			—	%	3,093			3.44	%	6/30/2006	9/18/2036	3 month LIBOR + 1.85
Gross subordinated debentures	541,697					555,146
Unamortized discount (3)	(88,753		)			(92,709		)
Net subordinated debentures	$	452,944				$	462,437

___________________

(1) Denomination is in Euros with a value of €25.8 million.

(2) Acquired in the CUB acquisition on October 20, 2017 and redeemed in the first quarter of 2018.

(3) Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions.

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments disclosure

The following table presents a summary of the financial instruments described above as of the dates indicated:

	September 30,		December 31,
	2018		2017
	(In thousands)
Loan commitments to extend credit	$	7,055,833	$	6,234,061
Standby letters of credit	335,651		320,063
Total	$	7,391,484	$	6,554,124

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair value, assets measured on recurring basis

The following tables present information on the assets and liabilities measured and recorded at fair value on a recurring basis as of the dates indicated:

	Fair Value Measurements as of
	September 30, 2018
Measured on a Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Securities available‑for‑sale:
Residential MBS and CMOs:
Agency MBS	$	249,831	$	—	$	249,831	$	—
Agency CMOs	569,605		—		569,605		—
Private label CMOs	110,450		—		97,327		13,123
Municipal securities	1,271,583		—		1,271,583		—
Agency commercial MBS	1,077,005		—		1,077,005		—
U.S. Treasury securities	397,631		397,631		—		—
SBA securities	67,586		—		67,586		—
Asset-backed securities	58,452		—		29,353		29,099
Corporate debt securities	18,190		—		18,190		—
Total securities available-for-sale	3,820,333		397,631		3,380,480		42,222
Equity warrants	4,962		—		—		4,962
Other derivative assets	2,072		—		2,072		—
Equity investments with readily determinable fair values	6,552		6,552		—		—
Total recurring assets	$	3,833,919	$	404,183	$	3,382,552	$	47,184
Derivative liabilities	$	468	$	—	$	468	$	—

	Fair Value Measurements as of
	December 31, 2017
Measured on a Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Securities available‑for‑sale:
Residential MBS and CMOs:
Agency MBS	$	246,274	$	—	$	246,274	$	—
Agency CMOs	275,709		—		275,709		—
Private label CMOs	125,987		—		103,113		22,874
Municipal securities	1,680,068		—		1,680,068		—
Agency commercial MBS	1,163,969		—		1,163,969		—
SBA securities	160,334		—		160,334		—
Asset-backed securities	88,710		—		46,601		42,109
Corporate debt securities	19,295		—		19,295		—
Collateralized loan obligations	7,015		—		7,015		—
Equity investments (1)	7,070		5,922		1,148		—
Total securities available-for-sale	3,774,431		5,922		3,703,526		64,983
Equity warrants	5,161		—		—		5,161
Other derivative assets	1,873		—		1,873		—
Total recurring assets	$	3,781,465	$	5,922	$	3,705,399	$	70,144
Derivative liabilities	$	1,379	$	—	$	1,379	$	—

____________________________

(1) In connection with our adoption of ASU 2016-01 and ASU 2018-03 on January 1, 2018, we reclassified $7.1 million of equity investments from securities available-for-sale to other assets in the first quarter of 2018. The reclassification was applied prospectively without prior period amounts being restated.

Fair value, assets and liabilities measured on nonrecurring basis, valuation techniques

The following table presents information about quantitative inputs and assumptions used to determine the fair values provided by our third party pricing service for our Level 3 private label CMOs and asset-backed securities available-for-sale measured at fair value on a recurring basis as of the date indicated:

	September 30, 2018
	Private Label CMOs		Asset-Backed Securities
		Weighted		Weighted
	Range	Average	Range	Average
Unobservable Inputs	of Inputs	Input	of Inputs	Input
Voluntary annual prepayment speeds	4.8% - 30.5%	9.4%	5% - 15%	14.2%
Annual default rates	0.0% - 25.3%	2.2%	1% - 2%	1.9%
Loss severity rates	5.2% - 135.5%	47.3%	10% - 60%	55.9%
Discount rates	2.2% - 10.5%	6.2%	3.2% - 4.3%	3.6%

Fair value, quantitative inputs and assumptions used to determine fair value

The following table presents information about quantitative inputs and assumptions used in the modified Black-Scholes option pricing model to determine the fair value for our Level 3 equity warrants measured at fair value on a recurring basis as of the date indicated:

	September 30, 2018
	Equity Warrants
	Weighted
	Average
Unobservable Inputs	Input
Volatility	16.3%
Risk-free interest rate	2.9%
Remaining life assumption (in years)	3.6

Fair value, assets measured on recurring basis, significant unobservable inputs (level 3) reconciliation

The following table summarizes activity for our Level 3 private label CMOs available-for-sale, asset-backed securities available-for-sale, and equity warrants measured at fair value on a recurring basis for the period indicated:

	Private			Asset-Backed			Equity
	Label CMOs			Securities			Warrants
	(In thousands)
Balance, December 31, 2017	$	22,874		$	42,109		$	5,161
Total included in earnings	595			(35		)	5,291
Total included in other comprehensive income	(511		)	220			—
Issuances	—			—			557
Salesand dispositions (1)	—			—			(5,972		)
Net settlements	(9,835		)	(13,195		)	—
Transfers to Level 1	—			—			(75		)
Balance, September 30, 2018	$	13,123		$	29,099		$	4,962

Assets carried at fair value on a nonrecurring basis

The following tables present assets measured at fair value on a non‑recurring basis as of the dates indicated:

	Fair Value Measurement as of
	September 30, 2018
Measured on a Non‑Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Impaired loans	$	41,103	$	—	$	15,423	$	25,680
OREO	953		—		953		—
Total non-recurring	$	42,056	$	—	$	16,376	$	25,680

	Fair Value Measurement as of
	December 31, 2017
Measured on a Non‑Recurring Basis	Total		Level 1		Level 2		Level 3
	(In thousands)
Impaired Non‑PCI loans	$	61,095	$	—	$	5,143	$	55,952
Loans held for sale	483,563		—		483,563		—
Total non-recurring	$	544,658	$	—	$	488,706	$	55,952

Net losses (gains) on nonrecurring assets

The following table presents losses recognized on assets measured on a nonrecurring basis for the periods indicated:

	Three Months Ended				Nine Months Ended
Losses on Assets	September 30,				September 30,
Measured on a Non‑Recurring Basis	2018		2017		2018		2017
	(In thousands)
Impaired loans (1)	$	14,347	$	4,427	$	31,351	$	17,895
OREO	—		2,124		65		2,124
Total losses	$	14,347	$	6,551	$	31,416	$	20,019

__________________________

(1) Losses for 2018 periods relate to total loans. Losses for 2017 periods relate to Non-PCI loans.

Fair value inputs, assets, quantitative information

The following table presents the valuation methodology and unobservable inputs for Level 3 assets measured at fair value on a nonrecurring basis as of the date indicated:

	September 30, 2018
			Valuation	Unobservable		Weighted
Asset	Fair Value		Technique	Inputs	Range	Average
	(In thousands)
Impaired loans	$	12,531	Discounted cash flows	Discount rates	3.75% - 7.75%	6.81%
Impaired loans	6,819		Internal enterprise value methodology	(1)	(1)	(1)
Impaired loans	6,330		Third party appraisals	No discounts
Total non-recurring Level 3	$	25,680

Fair value, by balance sheet grouping

The following tables present carrying amounts and estimated fair values of certain financial instruments as of the dates indicated:

	September 30, 2018
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and due from banks	$	196,502	$	196,502	$	196,502	$	—	$	—
Interest‑earning deposits in financial institutions	185,284		185,284		185,284		—		—
Securities available‑for‑sale	3,820,333		3,820,333		397,631		3,380,480		42,222
Investment in FHLB stock	31,077		31,077		—		31,077		—
Loans and leases held for investment, net	17,088,226		16,876,611		—		15,423		16,861,188
Equity warrants	4,962		4,962		—		—		4,962
Other derivative assets	2,072		2,072		—		2,072		—
Equity investments with readily determinable fair values	6,552		6,552		6,552		—		—
Financial Liabilities:
Core deposits	15,512,742		15,512,742		—		15,512,742		—
Non-core non-maturity deposits	483,528		483,528		—		483,528		—
Time deposits	1,883,273		1,894,024		—		1,894,024		—
Borrowings	1,513,166		1,513,163		1,503,000		10,163		—
Subordinated debentures	452,944		435,505		—		435,505		—
Derivative liabilities	468		468		—		468		—

	December 31, 2017
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and due from banks	$	233,215	$	233,215	$	233,215	$	—	$	—
Interest‑earning deposits in financial institutions	165,222		165,222		165,222		—		—
Securities available‑for‑sale	3,774,431		3,774,431		5,922		3,703,526		64,983
Investment in FHLB stock	20,790		20,790		—		20,790		—
Loans held for sale	481,100		483,563		—		483,563		—
Loans and leases held for investment, net	16,833,287		17,023,098		—		5,143		17,017,955
Equity warrants	5,161		5,161		—		—		5,161
Other derivative assets	1,873		1,873		—		1,873		—
Financial Liabilities:
Core deposits	15,937,012		15,937,012		—		15,937,012		—
Non-core non-maturity deposits	863,202		863,202		—		863,202		—
Time deposits	2,065,322		2,055,104		—		2,055,104		—
Borrowings	467,342		467,342		467,000		342		—
Subordinated debentures	462,437		444,383		—		444,383		—
Derivative liabilities	1,379		1,379		—		1,379		—

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Net income per share

The following table presents the computations of basic and diluted net earnings per share for the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,
	2018			2018			2017			2018			2017
	(Dollars in thousands, except per share data)
Basic Earnings Per Share:
Net earnings	$	116,287		$	115,735		$	101,466		$	350,298		$	273,781
Less: Earnings allocated to unvested restricted stock(1)	(1,428		)	(1,348		)	(1,149		)	(3,899		)	(3,239		)
Net earnings allocated to common shares	$	114,859		$	114,387		$	100,317		$	346,399		$	270,542
Weighted-average basic shares and unvested restricted
stock outstanding	123,657			126,082			121,447			125,728			121,405
Less: Weighted-average unvested restricted stock
outstanding	(1,537		)	(1,466		)	(1,394		)	(1,473		)	(1,450		)
Weighted-average basic shares outstanding	122,120			124,616			120,053			124,255			119,955
Basic earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26
Diluted Earnings Per Share:
Net earnings allocated to common shares	$	114,859		$	114,387		$	100,317		$	346,399		$	270,542
Weighted-average basic shares outstanding	122,120			124,616			120,053			124,255			119,955
Diluted earnings per share	$	0.94		$	0.92		$	0.84		$	2.79		$	2.26

________________________

(1) Represents cash dividends paid to holders of unvested restricted stock, net of forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

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Revenue From Contracts With Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue From Contracts With Customers [Abstract]

Revenue From Contracts With Customers

As illustrated here, substantially all of our revenue is specifically excluded from the scope of Topic 606.

	Three Months Ended September 30, 2018				Nine Months Ended September 30, 2018
	Total		Revenue from		Total		Revenue from
	Recorded		Contracts with		Recorded		Contracts with
	Revenue		Customers		Revenue		Customers
	(In thousands)
Total interest income	$	292,642	$	—	$	858,931	$	—
Noninterest income:
Service charges on deposit accounts	3,979		3,979		12,418		12,418
Other commissions and fees	12,397		4,767		34,429		14,519
Leased equipment income	9,120		—		28,497		—
Gain on sale of loans	—		—		4,675		—
Gain on sale of securities	826		—		7,390		—
Other income	10,590		444		27,700		1,341
Total noninterest income	36,912		9,190		115,109		28,278
Total revenue	$	329,554	$	9,190	$	974,040	$	28,278

Revenue Recognition of Contracts With Customers

The following table presents revenue from contracts with customers based on the timing of revenue recognition for the period indicated:

	Three Months Ended		Nine Months Ended
	September 30, 2018		September 30, 2018
	(In thousands)
Products and services transferred at a point in time	$	4,604	$	14,195
Products and services transferred over time	4,586		14,083
Total revenue from contracts with customers	$	9,190	$	28,278

Contract with Customer, Asset and Liability

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers:

	September 30, 2018
	(In thousands)
Receivables, which are included in "Other assets"	$	1,701
Contract assets, which are included in "Other assets"	$	—
Contract liabilities, which are included in "Interest payable and other liabilities"	$	654

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Organization (Details Textual)		9 Months Ended	12 Months Ended
	Sep. 12, 2018 USD ($) bank_branch	Sep. 30, 2018 USD ($) acquisition bank_branch	Dec. 31, 2017 reportable_segment
Business Acquisition [Line Items]
Number of Businesses Acquired | acquisition		29
Purchased Credit Impaired Loans and Leases
Business Acquisition [Line Items]
Percentage of nonaccrual loans and leases			0.40%
Pre- 2018 ALLL Methodology (2018) [Member] | Twenty-one (21) [Member]
Business Acquisition [Line Items]
Allowance for Credit Losses, Change in Method of Calculating Probable Credit Loss | reportable_segment			34
Pre- 2018 ALLL Methodology (2018) [Member] | Twenty-one (21) [Member]
Business Acquisition [Line Items]
Allowance for Credit Losses, Change in Method of Calculating Probable Credit Loss | reportable_segment			21
Accounting Standards Update 2016-01
Business Acquisition [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption | $		$ (529,000)
Accounting Standards Update 2018-02
Business Acquisition [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption | $		$ 6,665,000
Partnership Interest | Minimum
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		5.00%
El Dorado Savings Bank [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred | $	$ 466,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $	$ 2,200,000,000
number of branches	35
Equity Securities | Minimum
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		20.00%
Equity Securities | Maximum
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
CALIFORNIA
Business Acquisition [Line Items]
Retail Branch Locations		74
NORTH CAROLINA
Business Acquisition [Line Items]
Retail Branch Locations		1
NORTHERN CALIFORNIA | El Dorado Savings Bank [Member]
Business Acquisition [Line Items]
number of branches	8
NORTHERN NEVADA | El Dorado Savings Bank [Member]
Business Acquisition [Line Items]
number of branches	2

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Restricted Cash Balances (Details Textual) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Restricted Cash [Abstract]
Restricted Cash and Cash Equivalents	$ 76.9	$ 77.6
Pledged Cash for Derivative Contracts	$ 2.3	$ 2.7

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Acquisitions (Details Textual) - CU Bancorp [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Oct. 20, 2017
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loans And Leases Receivable Net Reported Amount Covered And Not Covered		$ 2,100.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		2,800.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		3,500.0
CU Bancorp [Member]
Goodwill, Acquired During Period	$ 374.7
Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		$ 2,700.0

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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Finite-lived Intangible Assets [Roll Forward]
CDI and CRI Balance, beginning of period	$ 119,497	$ 119,497	$ 64,187	$ 119,497	$ 64,187
Accumulated Amortization, beginning of period	(51,804)	(46,217)	(33,950)	(39,871)	(27,821)
Amortization	(5,587)	(5,587)	(3,049)	(17,520)	(9,178)
Fully amortized portion	0	0	2,190	0
CDI and CRI Balance, end of period	119,497	119,497	61,997	119,497	61,997
Accumulated Amortization, end of period	(57,391)	(51,804)	(34,809)	(57,391)	(34,809)
Net CDI and CRI, end of period	62,106	67,693	27,188	62,106	$ 27,188
CDI and CRI
Finite-lived Intangible Assets [Roll Forward]
Fully amortized portion	$ 0	$ 0	$ 2,190	$ 0

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Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization	$ 5,587	$ 5,587	$ 3,049	$ 17,520	$ 9,178
Aggregate amortization expense 2019	18,700			18,700
Aggregate amortization expense 2020	14,600			14,600
Aggregate amortization expense 2021	10,800			10,800
Aggregate amortization expense 2022	7,500			7,500
Aggregate amortization expense 2023	$ 1,400			$ 1,400
Scenario, Forecast
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization						$ 22,500

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Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	$ 3,881,727	$ 3,721,525
Available-for-sale Securities, Gross Unrealized Gain	17,072	68,965
Available-for-sale Securities, Gross Unrealized Loss	(78,466)	(16,059)
Securities available‑for‑sale	3,820,333	3,774,431
Government agency and government-sponsored enterprise pass through securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	251,150	243,375
Available-for-sale Securities, Gross Unrealized Gain	1,971	3,743
Available-for-sale Securities, Gross Unrealized Loss	(3,290)	(844)
Securities available‑for‑sale	249,831	246,274
Government agency and government-sponsored enterprise collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	583,062	277,638
Available-for-sale Securities, Gross Unrealized Gain	220	968
Available-for-sale Securities, Gross Unrealized Loss	(13,677)	(2,897)
Securities available‑for‑sale	569,605	275,709
Private label collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	110,353	122,816
Available-for-sale Securities, Gross Unrealized Gain	2,699	3,813
Available-for-sale Securities, Gross Unrealized Loss	(2,602)	(642)
Securities available‑for‑sale	110,450	125,987
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	1,272,501	1,627,707
Available-for-sale Securities, Gross Unrealized Gain	10,974	53,700
Available-for-sale Securities, Gross Unrealized Loss	(11,892)	(1,339)
Securities available‑for‑sale	1,271,583	1,680,068
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	1,117,749	1,169,969
Available-for-sale Securities, Gross Unrealized Gain	0	2,758
Available-for-sale Securities, Gross Unrealized Loss	(40,744)	(8,758)
Securities available‑for‑sale	1,077,005	1,163,969
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	400,591	0
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	(2,960)	0
Securities available‑for‑sale	397,631	0
SBA asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	69,999	160,214
Available-for-sale Securities, Gross Unrealized Gain	0	695
Available-for-sale Securities, Gross Unrealized Loss	(2,413)	(575)
Securities available‑for‑sale	67,586	160,334
Asset-backed
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	59,322	89,425
Available-for-sale Securities, Gross Unrealized Gain	18	159
Available-for-sale Securities, Gross Unrealized Loss	(888)	(874)
Securities available‑for‑sale	58,452	88,710
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	17,000	17,000
Available-for-sale Securities, Gross Unrealized Gain	1,190	2,295
Available-for-sale Securities, Gross Unrealized Loss	0	0
Securities available‑for‑sale	18,190	19,295
Collateralized loan obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	0	6,960
Available-for-sale Securities, Gross Unrealized Gain	0	55
Available-for-sale Securities, Gross Unrealized Loss	0	0
Securities available‑for‑sale	0	7,015
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	0	6,421
Available-for-sale Securities, Gross Unrealized Gain	0	779
Available-for-sale Securities, Gross Unrealized Loss	0	(130)
Securities available‑for‑sale	$ 0	$ 7,070

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Investment Securities (Details 1) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	$ 2,196,523	$ 1,026,780
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(48,298)	(8,928)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	645,464	223,832
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(30,168)	(7,131)
Unrealized Losses on Securities Available-for-Sale, Fair Value	2,841,987	1,250,612
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(78,466)	(16,059)
Government agency and government-sponsored enterprise pass through securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	76,238	44,795
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(1,332)	(311)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	51,861	26,010
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(1,958)	(533)
Unrealized Losses on Securities Available-for-Sale, Fair Value	128,099	70,805
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(3,290)	(844)
Government agency and government-sponsored enterprise collateralized mortgage obligations
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	401,795	163,014
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(6,418)	(2,452)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	140,997	20,928
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(7,259)	(445)
Unrealized Losses on Securities Available-for-Sale, Fair Value	542,792	183,942
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(13,677)	(2,897)
Private label collateralized mortgage obligations
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	46,713	50,521
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(1,101)	(500)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	34,654	5,035
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(1,501)	(142)
Unrealized Losses on Securities Available-for-Sale, Fair Value	81,367	55,556
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(2,602)	(642)
Municipal securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	436,012	67,936
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(8,743)	(365)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	55,402	32,326
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(3,149)	(974)
Unrealized Losses on Securities Available-for-Sale, Fair Value	491,414	100,262
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(11,892)	(1,339)
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	784,452	579,373
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(26,454)	(3,777)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	292,553	129,060
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(14,290)	(4,981)
Unrealized Losses on Securities Available-for-Sale, Fair Value	1,077,005	708,433
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(40,744)	(8,758)
US Treasury Securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	397,631
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(2,960)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	0
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	0
Unrealized Losses on Securities Available-for-Sale, Fair Value	397,631
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(2,960)
SBA asset-backed securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	32,867	74,904
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(1,143)	(575)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	34,719	0
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(1,270)	0
Unrealized Losses on Securities Available-for-Sale, Fair Value	67,586	74,904
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(2,413)	(575)
Asset-backed
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	20,815	45,198
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(147)	(818)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	35,278	10,473
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(741)	(56)
Unrealized Losses on Securities Available-for-Sale, Fair Value	56,093	55,671
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	$ (888)	(874)
Equity Securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value		1,039
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses		(130)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value		0
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses		0
Unrealized Losses on Securities Available-for-Sale, Fair Value		1,039
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses		$ (130)

XML

Investment Securities (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 39,300
Due after one year through five years	716,172
Due after five years through ten years	970,758
Due after ten years	2,155,497
Total securities available-for-sale	3,881,727	$ 3,721,525
Fair Value
Due in one year or less	39,272
Due after one year through five years	707,368
Due after five years through ten years	937,317
Due after ten years	2,136,376
Total securities available-for-sale	$ 3,820,333	$ 3,774,431

XML

Investment Securities (Details 3) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Taxable interest	$ 17,618	$ 17,106	$ 13,576	$ 49,323	$ 39,257
Non-taxable interest	10,127	10,276	10,795	31,510	31,926
Dividend income	316	348	391	1,096	1,307
Total interest income on investment securities	$ 28,061	$ 27,730	$ 24,762	$ 81,929	$ 72,490

XML

Investment Securities (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
AFS securities pledged as collateral	$ 427,800,000		$ 427,800,000
Proceeds from sales of securities available-for-sale			500,101,000	$ 185,533,000
Gross realized gains on sale of securities	958,000	$ 1,300,000	8,100,000	3,300,000
Gross realized losses on sale of securities	(132,000)	(119,000)	(707,000)	(498,000)
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities available-for-sale	$ 130,500,000	$ 98,300,000	492,700,000	$ 182,700,000
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ 7,100,000

XML

Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	$ 17,295,589		$ 17,032,221
Deferred fees, net	(65,443)		(59,478)
Loans held for investment, net	17,230,146		16,972,743
Allowance for loan and lease losses	(141,920)	$ (132,139)	(139,456)
Total loans and leases held for investment, net	17,088,226		16,833,287
NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases held for investment, net			16,833,287
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			16,974,171
Deferred fees, net			(59,464)
Loans held for investment, net			16,914,707	[1],[2],[3]	$ 15,628,023
Allowance for loan and lease losses	(152,770)		(133,012)		(152,770)	$ (138,879)	$ (143,755)
Total loans and leases held for investment, net			16,781,695
Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			58,050
Deferred fees, net			(14)
Loans held for investment, net			58,036		62,494
Allowance for loan and lease losses			(6,444)
Total loans and leases held for investment, net			51,592
Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	7,695,182
Loans held for investment, net	7,678,660
Allowance for loan and lease losses	(46,357)	(45,467)	(40,051)
Real Estate Mortgage | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			7,869,013
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			7,815,355
Loans held for investment, net			7,798,991	[2],[3]	6,131,196
Allowance for loan and lease losses	(36,441)				(36,441)	(37,122)	(37,765)
Real Estate Mortgage | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			53,658
Real Estate Construction and Land
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	2,026,645
Loans held for investment, net	2,000,957
Allowance for loan and lease losses	(26,186)	(26,210)	(13,055)
Real Estate Construction and Land | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			1,611,287
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			1,611,287
Loans held for investment, net			1,591,229	[2],[3]	1,249,222
Allowance for loan and lease losses	(11,693)				(11,693)	(11,318)	(10,045)
Real Estate Construction and Land | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			0
Commercial
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	7,175,310
Loans held for investment, net	7,152,058
Allowance for loan and lease losses	(67,644)	(58,806)	(84,022)
Commercial | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			7,142,136
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			7,137,978
Loans held for investment, net			7,114,920	[2],[3]	7,861,692
Allowance for loan and lease losses	(102,193)				(102,193)	(88,364)	(93,853)
Commercial | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			4,158
Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	398,452
Loans held for investment, net	398,471
Allowance for loan and lease losses	(1,733)	$ (1,656)	(2,328)
Consumer | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			409,785
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			409,551
Loans held for investment, net			409,567	[2],[3]	385,913
Allowance for loan and lease losses	$ (2,443)				$ (2,443)	$ (2,075)	$ (2,092)
Consumer | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment			$ 234

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

XML

Loans and Leases (Details 1) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017		Sep. 30, 2017
Delinquent loans in loan portfolio
30-89 Days Past Due		$ 18,221	$ 3,200
90 or More Days Past Due		14,315	14,200
Total Past Due		32,536
Current		17,197,610
Loans held for investment, net		17,230,146	16,972,743
Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	[1]		48,435
90 or More Days Past Due	[1]		14,165
Total Past Due	[1]		62,600
Current	[1]		16,852,107
Loans held for investment, net			16,914,707	[1],[2],[3]	$ 15,628,023
Real Estate Mortgage
Delinquent loans in loan portfolio
30-89 Days Past Due		7,868
90 or More Days Past Due		9,394
Total Past Due		17,262
Current		7,661,398
Loans held for investment, net		7,678,660
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			36,069
90 or More Days Past Due			11,129
Total Past Due			47,198
Current			7,751,793
Loans held for investment, net			7,798,991	[2],[3]	6,131,196
Real Estate Mortgage | Commercial
Delinquent loans in loan portfolio
30-89 Days Past Due		2,221
90 or More Days Past Due		8,949
Total Past Due		11,170
Current		4,921,653
Loans held for investment, net		4,932,823
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			29,070
90 or More Days Past Due			9,107
Total Past Due			38,177
Current			5,323,310
Loans held for investment, net	[2],[3]		5,361,487
Real Estate Mortgage | Residential Real Estate
Delinquent loans in loan portfolio
30-89 Days Past Due		5,647
90 or More Days Past Due		445
Total Past Due		6,092
Current		2,739,745
Loans held for investment, net		2,745,837
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			6,999
90 or More Days Past Due			2,022
Total Past Due			9,021
Current			2,428,483
Loans held for investment, net	[2],[3]		2,437,504
Real Estate Construction and Land
Delinquent loans in loan portfolio
30-89 Days Past Due		8,498
90 or More Days Past Due		0
Total Past Due		8,498
Current		1,992,459
Loans held for investment, net		2,000,957
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			2,081
90 or More Days Past Due			0
Total Past Due			2,081
Current			1,589,148
Loans held for investment, net			1,591,229	[2],[3]	1,249,222
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable
Delinquent loans in loan portfolio
30-89 Days Past Due		0
90 or More Days Past Due		0
Total Past Due		0
Current		854,346
Loans held for investment, net		854,346
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			0
90 or More Days Past Due			0
Total Past Due			0
Current			769,075
Loans held for investment, net	[2],[3]		769,075
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable
Delinquent loans in loan portfolio
30-89 Days Past Due		8,498
90 or More Days Past Due		0
Total Past Due		8,498
Current		1,138,113
Loans held for investment, net		1,146,611
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			2,081
90 or More Days Past Due			0
Total Past Due			2,081
Current			820,073
Loans held for investment, net	[2],[3]		822,154
Commercial
Delinquent loans in loan portfolio
30-89 Days Past Due		1,250
90 or More Days Past Due		4,876
Total Past Due		6,126
Current		7,145,932
Loans held for investment, net		7,152,058
Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			9,723
90 or More Days Past Due			3,036
Total Past Due			12,759
Current			7,102,161
Loans held for investment, net			7,114,920	[2],[3]	7,861,692
Commercial | Asset Based
Delinquent loans in loan portfolio
30-89 Days Past Due		0
90 or More Days Past Due		655
Total Past Due		655
Current		3,221,656
Loans held for investment, net		3,222,311
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			344
90 or More Days Past Due			690
Total Past Due			1,034
Current			2,923,837
Loans held for investment, net	[2],[3]		2,924,871
Commercial | Venture Capital Loans
Delinquent loans in loan portfolio
30-89 Days Past Due		1,028
90 or More Days Past Due		497
Total Past Due		1,525
Current		2,030,370
Loans held for investment, net		2,031,895
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			6,533
90 or More Days Past Due			760
Total Past Due			7,293
Current			2,115,418
Loans held for investment, net	[2],[3]		2,122,711
Commercial | Other Commercial
Delinquent loans in loan portfolio
30-89 Days Past Due		222
90 or More Days Past Due		3,724
Total Past Due		3,946
Current		1,893,906
Loans held for investment, net		1,897,852
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			2,846
90 or More Days Past Due			1,586
Total Past Due			4,432
Current			2,062,906
Loans held for investment, net	[2],[3]		2,067,338
Consumer
Delinquent loans in loan portfolio
30-89 Days Past Due		605
90 or More Days Past Due		45
Total Past Due		650
Current		397,821
Loans held for investment, net		$ 398,471
Consumer | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			562
90 or More Days Past Due			0
Total Past Due			562
Current			409,005
Loans held for investment, net			$ 409,567	[2],[3]	$ 385,913

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

XML

Loans and Leases (Details 2) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017		Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Nonaccrual		$ 112,972	$ 155,784	[1]
Loans held for investment		17,230,146	16,972,743
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		155,784
Loans held for investment			16,914,707	[2],[3],[4]	$ 15,628,023
Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		17,117,174
Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		16,758,923
Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Nonaccrual		32,982
Loans held for investment		7,678,660
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[1],[2]		68,913
Loans held for investment			7,798,991	[2],[4]	6,131,196
Real Estate Mortgage | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		7,645,678
Real Estate Mortgage | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		7,730,078
Real Estate Mortgage | Commercial
Financing Receivable, Impaired [Line Items]
Nonaccrual		29,723
Loans held for investment		4,932,823
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		65,563
Loans held for investment	[2],[4]		5,361,487
Real Estate Mortgage | Commercial | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		4,903,100
Real Estate Mortgage | Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		5,295,924
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Impaired [Line Items]
Nonaccrual		3,259
Loans held for investment		2,745,837
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		3,350
Loans held for investment	[2],[4]		2,437,504
Real Estate Mortgage | Residential Real Estate | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		2,742,578
Real Estate Mortgage | Residential Real Estate | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		2,434,154
Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Nonaccrual		0
Loans held for investment		2,000,957
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[1],[2]		0
Loans held for investment			1,591,229	[2],[4]	1,249,222
Real Estate Construction and Land | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		2,000,957
Real Estate Construction and Land | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		1,591,229
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Impaired [Line Items]
Nonaccrual		0
Loans held for investment		854,346
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		0
Loans held for investment	[2],[4]		769,075
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		854,346
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		769,075
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable
Financing Receivable, Impaired [Line Items]
Nonaccrual		0
Loans held for investment		1,146,611
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		0
Loans held for investment	[2],[4]		822,154
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		1,146,611
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		822,154
Commercial
Financing Receivable, Impaired [Line Items]
Nonaccrual		79,718
Loans held for investment		7,152,058
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[1],[2]		86,851
Loans held for investment			7,114,920	[2],[4]	7,861,692
Commercial | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		7,072,340
Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		7,028,069
Commercial | Asset Based
Financing Receivable, Impaired [Line Items]
Nonaccrual		34,619
Loans held for investment		3,222,311
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		33,553
Loans held for investment	[2],[4]		2,924,871
Commercial | Asset Based | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		3,187,692
Commercial | Asset Based | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		2,891,318
Commercial | Venture Capital Loans
Financing Receivable, Impaired [Line Items]
Nonaccrual		35,520
Loans held for investment		2,031,895
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		29,424
Loans held for investment	[2],[4]		2,122,711
Commercial | Venture Capital Loans | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		1,996,375
Commercial | Venture Capital Loans | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		2,093,287
Commercial | Other Commercial
Financing Receivable, Impaired [Line Items]
Nonaccrual		9,579
Loans held for investment		1,897,852
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[2]		23,874
Loans held for investment	[2],[4]		2,067,338
Commercial | Other Commercial | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		1,888,273
Commercial | Other Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		2,043,464
Consumer
Financing Receivable, Impaired [Line Items]
Nonaccrual		272
Loans held for investment		398,471
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	[1],[2]		20
Loans held for investment			409,567	[2],[4]	$ 385,913
Consumer | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment		$ 398,199
Consumer | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	[2]		$ 409,547

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[4] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

XML

Loans and Leases (Details 3) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017		Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		$ 17,230,146	$ 16,972,743
Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		260,459
Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		360,058
Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		16,609,629
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment			16,914,707	[1],[2],[3]	$ 15,628,023
Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		278,405
Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		302,168
Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		16,334,134
Real Estate Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		7,678,660
Real Estate Mortgage | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		75,828
Real Estate Mortgage | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		152,647
Real Estate Mortgage | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		7,450,185
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment			7,798,991	[2],[3]	6,131,196
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		102,220
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		127,070
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		7,569,701
Real Estate Mortgage | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		4,932,823
Real Estate Mortgage | Commercial | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		64,574
Real Estate Mortgage | Commercial | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		140,611
Real Estate Mortgage | Commercial | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		4,727,638
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		5,361,487
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		93,795
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		122,488
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		5,145,204
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,745,837
Real Estate Mortgage | Residential Real Estate | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		11,254
Real Estate Mortgage | Residential Real Estate | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		12,036
Real Estate Mortgage | Residential Real Estate | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,722,547
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		2,437,504
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		8,425
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		4,582
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		2,424,497
Real Estate Construction and Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,000,957
Real Estate Construction and Land | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		442
Real Estate Construction and Land | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		28,478
Real Estate Construction and Land | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,972,037
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment			1,591,229	[2],[3]	1,249,222
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		0
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		619
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		1,590,610
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		854,346
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		442
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		3,833
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		850,071
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		769,075
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		0
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		0
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		769,075
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,146,611
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		0
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		24,645
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,121,966
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		822,154
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		0
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		619
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		821,535
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		7,152,058
Commercial | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		183,754
Commercial | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		177,237
Commercial | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		6,791,067
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment			7,114,920	[2],[3]	7,861,692
Commercial | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		175,922
Commercial | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		173,349
Commercial | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		6,765,649
Commercial | Asset Based
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		3,222,311
Commercial | Asset Based | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		42,960
Commercial | Asset Based | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		64,778
Commercial | Asset Based | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		3,114,573
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		2,924,871
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		51,000
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		37,256
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		2,836,615
Commercial | Venture Capital Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,031,895
Commercial | Venture Capital Loans | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		47,230
Commercial | Venture Capital Loans | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		65,295
Commercial | Venture Capital Loans | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,919,370
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		2,122,711
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		49,671
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		114,210
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		1,958,830
Commercial | Other Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,897,852
Commercial | Other Commercial | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		93,564
Commercial | Other Commercial | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		47,164
Commercial | Other Commercial | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,757,124
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2],[3]		2,067,338
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		75,251
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		21,883
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		1,970,204
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		398,471
Consumer | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		435
Consumer | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		1,696
Consumer | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		$ 396,340
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment			409,567	[2],[3]	$ 385,913
Consumer | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		263
Consumer | Non Purchased Credit Impaired Loans and Leases | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		1,130
Consumer | Non Purchased Credit Impaired Loans and Leases | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	[2]		$ 408,174

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

XML

Loans and Leases (Details 4) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		$ 112,972	$ 155,784	[1]
Performing Restructured Loans		22,106	56,838	[1]
Total Impaired Loans and Leases		135,078	212,622	[1]
Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[2]		155,784
Total Impaired Loans and Leases	[3]		212,622
Real Estate Mortgage
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		32,982
Performing Restructured Loans		15,296
Total Impaired Loans and Leases		48,278
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		68,913
Performing Restructured Loans	[1]		47,560
Total Impaired Loans and Leases	[1],[3]		116,473
Real Estate Construction and Land
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		0
Performing Restructured Loans		5,533
Total Impaired Loans and Leases		5,533
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		0
Performing Restructured Loans	[1]		5,690
Total Impaired Loans and Leases	[1],[3]		5,690
Commercial
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		79,718
Performing Restructured Loans		1,166
Total Impaired Loans and Leases		80,884
Commercial | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		86,851
Performing Restructured Loans	[1]		3,488
Total Impaired Loans and Leases	[1],[3]		90,339
Consumer
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		272
Performing Restructured Loans		111
Total Impaired Loans and Leases		$ 383
Consumer | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	[1],[2]		20
Performing Restructured Loans	[1]		100
Total Impaired Loans and Leases	[1],[3]		$ 120

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

XML

Loans and Leases (Details 5) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017		Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		$ 20,859				$ 20,859
Total Impaired Loans and Leases		135,078				135,078				$ 212,622	[1]
Impaired Financing Receivable, Unpaid Principal Balance		207,762				207,762
Impaired Financing Receivable, Average Recorded Investment		126,081	[2]			111,636	[3]
Impaired Financing Receivable, Interest Income, Accrual Method		335				984
Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		496				496
Total Impaired Loans and Leases		48,278				48,278
Impaired Financing Receivable, Unpaid Principal Balance		68,887				68,887
Impaired Financing Receivable, Average Recorded Investment		46,336	[2]			44,218	[3]
Impaired Financing Receivable, Interest Income, Accrual Method		213				625
Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		0				0
Total Impaired Loans and Leases		5,533				5,533
Impaired Financing Receivable, Unpaid Principal Balance		5,537				5,537
Impaired Financing Receivable, Average Recorded Investment		5,533	[2]			5,533	[3]
Impaired Financing Receivable, Interest Income, Accrual Method		95				283
Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		20,363				20,363
Total Impaired Loans and Leases		80,884				80,884
Impaired Financing Receivable, Unpaid Principal Balance		132,791				132,791
Impaired Financing Receivable, Average Recorded Investment		73,829	[2]			61,512	[3]
Impaired Financing Receivable, Interest Income, Accrual Method		25				70
Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0				0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0				0
Impaired Financing Receivable, with Related Allowance, Related Allowance		0				0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		383				383
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		547				547
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	[2]			0	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0				0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		383	[2]			373	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		2				6
Total Impaired Loans and Leases		383				383
Impaired Financing Receivable, Unpaid Principal Balance		547				547
Impaired Financing Receivable, Average Recorded Investment		383	[2]			373	[3]
Impaired Financing Receivable, Interest Income, Accrual Method		2				6
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									13,621
Total Impaired Loans and Leases	[4]									212,622
Impaired Financing Receivable, Unpaid Principal Balance	[4]									287,236
Impaired Financing Receivable, Average Recorded Investment				$ 209,021	[2]			$ 196,699	[3]
Impaired Financing Receivable, Interest Income, Accrual Method				1,025				3,025
Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									970
Total Impaired Loans and Leases	[1],[4]									116,473
Impaired Financing Receivable, Unpaid Principal Balance	[4]									129,909
Impaired Financing Receivable, Average Recorded Investment				113,643	[2]			112,071	[3]
Impaired Financing Receivable, Interest Income, Accrual Method				878				2,643
Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									0
Total Impaired Loans and Leases	[1],[4]									5,690
Impaired Financing Receivable, Unpaid Principal Balance	[4]									5,689
Impaired Financing Receivable, Average Recorded Investment				5,764	[2]			5,764	[3]
Impaired Financing Receivable, Interest Income, Accrual Method				74				220
Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									12,635
Total Impaired Loans and Leases	[1],[4]									90,339
Impaired Financing Receivable, Unpaid Principal Balance	[4]									151,445
Impaired Financing Receivable, Average Recorded Investment				89,212	[2]			78,462	[3]
Impaired Financing Receivable, Interest Income, Accrual Method				71				156
Non Purchased Credit Impaired Loans and Leases | Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]									100
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]									100
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									16
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									20
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									93
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment				106	[2]			106	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method				2				6
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				296	[2]			296	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				0				0
Total Impaired Loans and Leases	[1],[4]									120
Impaired Financing Receivable, Unpaid Principal Balance	[4]									193
Impaired Financing Receivable, Average Recorded Investment				402	[2]			402	[3]
Impaired Financing Receivable, Interest Income, Accrual Method				2				6
Asset Based | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		34,618				34,618
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		40,085				40,085
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		34,618	[2]			34,618	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0				0
Asset Based | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									33,553
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									54,911
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				31,086	[2]			30,682	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				0				0
Venture Capital Loans | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		34,515				34,515
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		36,149				36,149
Impaired Financing Receivable, with Related Allowance, Related Allowance		19,003				19,003
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		1,421				1,421
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		26,853				26,853
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		28,322	[2]			17,459	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0				0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		1,421	[2]			1,330	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0				0
Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]									16,565
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]									17,203
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									4,267
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									14,534
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									40,029
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment				18,298	[2]			9,621	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method				0				0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				2,647	[2]			1,922	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				0				0
Other Commercial | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,360				1,360
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,361				1,361
Impaired Financing Receivable, with Related Allowance, Related Allowance		1,360				1,360
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		8,970				8,970
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		28,343				28,343
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		1,360	[2]			688	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0				0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		8,108	[2]			7,417	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		25				70
Other Commercial | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]									20,404
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]									29,951
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									8,368
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									5,283
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									9,351
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment				33,486	[2]			33,193	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method				31				88
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				3,695	[2]			3,044	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				40				68
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		5,533				5,533
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		5,537				5,537
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		5,533	[2]			5,533	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		95				283
Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									5,690
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									5,689
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				5,764	[2]			5,764	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				74				220
Commercial | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,781				1,781
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,682				1,682
Impaired Financing Receivable, with Related Allowance, Related Allowance		225				225
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		36,087				36,087
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		54,497				54,497
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		1,781	[2]			1,781	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		18				55
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		34,155	[2]			32,098	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		129				376
Commercial | Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]									15,750
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]									16,548
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									628
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									93,827
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									105,923
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment				14,716	[2]			14,716	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method				214				634
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				92,183	[2]			90,631	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				635				1,924
Residential Real Estate | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		2,495				2,495
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		2,536				2,536
Impaired Financing Receivable, with Related Allowance, Related Allowance		271				271
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		7,915				7,915
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		10,172				10,172
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		2,494	[2]			2,494	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		21				62
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		7,906	[2]			7,845	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		$ 45				$ 132
Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]									2,787
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]									2,957
Impaired Financing Receivable, with Related Allowance, Related Allowance	[4]									342
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]									4,109
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]									$ 4,481
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[3]			3,074				3,074
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method				14				41
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				3,670	[2]			3,650	[3]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method				$ 15				$ 44

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] (1)For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

[3] For loans and leases reported as impaired at September 30, 2018 and 2017, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

[4] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

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Loans and Leases (Details 6) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) contract Contract	Sep. 30, 2017 USD ($) contract Contract	Sep. 30, 2018 USD ($) contract Contract		Sep. 30, 2017 USD ($) contract Contract
Financing Receivable, Modifications [Line Items]
Number of loans | contract	23	13	35		43
Pre-Modification Outstanding Recorded Investment	$ 57,736	$ 29,018	$ 76,517		$ 63,597
Post-Modification Outstanding Recorded Investment	$ 60,187	$ 19,226	$ 77,909		$ 53,097
Number of Loans | Contract	0	0	0		0
Real Estate Mortgage | Commercial
Financing Receivable, Modifications [Line Items]
Number of loans | contract	4	1	4		5
Pre-Modification Outstanding Recorded Investment	$ 2,889	$ 998	$ 2,889		$ 2,527
Post-Modification Outstanding Recorded Investment	$ 712	$ 998	$ 712		$ 2,463
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of loans | contract	5	3	8		8
Pre-Modification Outstanding Recorded Investment	$ 912	$ 566	$ 2,616		$ 1,328
Post-Modification Outstanding Recorded Investment	$ 912	$ 10	$ 1,557		$ 489
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Modifications [Line Items]
Number of loans | contract					1
Pre-Modification Outstanding Recorded Investment					$ 362
Post-Modification Outstanding Recorded Investment					$ 0
Commercial | Asset Based
Financing Receivable, Modifications [Line Items]
Number of loans | contract	4	0	4		2
Pre-Modification Outstanding Recorded Investment	$ 28,947	$ 0	$ 28,947	[1]	$ 665
Post-Modification Outstanding Recorded Investment	$ 33,947	$ 0	$ 33,947	[1]	$ 665
Commercial | Other Commercial
Financing Receivable, Modifications [Line Items]
Number of loans	5	5	9		17
Pre-Modification Outstanding Recorded Investment	$ 1,487	$ 12,146	$ 13,301		$ 30,153
Post-Modification Outstanding Recorded Investment	$ 1,115	$ 2,910	$ 12,929		$ 20,918
Commercial | Venture Capital Loans
Financing Receivable, Modifications [Line Items]
Number of loans	5	4	9		9
Pre-Modification Outstanding Recorded Investment	$ 23,501	$ 15,308	$ 28,737		$ 28,465
Post-Modification Outstanding Recorded Investment	$ 23,501	$ 15,308	$ 28,737		$ 28,465
Consumer
Financing Receivable, Modifications [Line Items]
Number of loans | contract			1		1
Pre-Modification Outstanding Recorded Investment			$ 27		$ 97
Post-Modification Outstanding Recorded Investment			$ 27		$ 97
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Modifications [Line Items]
Number of loans | contract			0
Pre-Modification Outstanding Recorded Investment			$ 0
Post-Modification Outstanding Recorded Investment			$ 0

[1] One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was a restructuring of a loan secured by oil services equipment that was originally restructured in 2015 after being placed on nonaccrual status. The loan has since been extended four times, the last in the fourth quarter of 2017. As part of the current restructuring, additional funds were advanced in exchange for the receipt of additional equipment collateral and a partial personal guaranty.

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Loans and Leases (Details 7) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 132,139		$ 139,456
Charge-offs	(3,308)		(33,696)
Recoveries	1,589		9,886
Allowance for Loan and Lease Losses, Net charge-offs	(1,719)	$ (925)	(23,810)	$ (45,692)
Provision	11,500		26,274
Balance, end of period	141,920		141,920
Amount of the allowance applicable to loans and leases:
impairment	20,859		20,859
impairment	121,061		121,061
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	130,011		130,011
impairment	17,100,135		17,100,135
Ending balance of loans and leases	17,230,146		17,230,146		$ 16,972,743
Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		138,879	133,012	143,755
Charge-offs		(5,928)		(49,807)
Recoveries		4,865		9,608
Allowance for Loan and Lease Losses, Net charge-offs		(1,063)		(40,199)
Provision		14,954		49,214
Balance, end of period	152,770	152,770	152,770	152,770
Amount of the allowance applicable to loans and leases:
impairment		16,182		16,182
impairment		136,588		136,588
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment		213,252		213,252
impairment		15,414,771		15,414,771
Ending balance of loans and leases		15,628,023		15,628,023	16,914,707	[1],[2],[3]
Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period			6,444
Balance, beginning of period		7,079		13,483
Charge-offs		(79)		(5,768)
Recoveries		217		275
Allowance for Loan and Lease Losses, Net charge-offs		138		(5,493)
Provision		(381)		(1,154)
Balance, end of period	6,836	6,836	6,836	6,836
Amount of the allowance applicable to loans and leases:
deteriorated credit quality		6,836		6,836
The ending balance of the loan and lease portfolio is composed of loans and leases:
deteriorated credit quality		62,494		62,494
Ending balance of loans and leases		62,494		62,494	58,036
NonPCI and PCI Loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		145,958		157,238
Charge-offs		(6,007)		(55,575)
Recoveries		5,082		9,883
Provision		14,573		48,060
Balance, end of period	159,606	159,606	159,606	159,606
The ending balance of the loan and lease portfolio is composed of loans and leases:
Total loans and leases		15,690,517		15,690,517
Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for Loan and Lease Losses, Net charge-offs		138		(5,493)
Real Estate Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	45,467		40,051
Charge-offs	(726)		(8,071)
Recoveries	222		1,999
Allowance for Loan and Lease Losses, Net charge-offs	(504)	(495)	(6,072)	(1,931)
Provision	1,394		12,378
Balance, end of period	46,357		46,357
Amount of the allowance applicable to loans and leases:
impairment	496		496
impairment	45,861		45,861
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	44,985		44,985
impairment	7,633,675		7,633,675
Ending balance of loans and leases	7,678,660		7,678,660
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		37,122		37,765
Charge-offs		(531)		(2,217)
Recoveries		36		286
Provision		(186)		607
Balance, end of period	36,441	36,441	36,441	36,441
Amount of the allowance applicable to loans and leases:
impairment		1,153		1,153
impairment		35,288		35,288
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment		113,304		113,304
impairment		6,017,892		6,017,892
Ending balance of loans and leases		6,131,196		6,131,196	7,798,991	[2],[3]
Real Estate Construction and Land
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	26,210		13,055
Charge-offs	0		0
Recoveries	23		49
Allowance for Loan and Lease Losses, Net charge-offs	23	353	49	370
Provision	(47)		13,082
Balance, end of period	26,186		26,186
Amount of the allowance applicable to loans and leases:
impairment	0		0
impairment	26,186		26,186
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	5,533		5,533
impairment	1,995,424		1,995,424
Ending balance of loans and leases	2,000,957		2,000,957
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		11,318		10,045
Charge-offs		0		0
Recoveries		353		370
Provision		22		1,278
Balance, end of period	11,693	11,693	11,693	11,693
Amount of the allowance applicable to loans and leases:
impairment		0		0
impairment		11,693		11,693
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment		5,764		5,764
impairment		1,243,458		1,243,458
Ending balance of loans and leases		1,249,222		1,249,222	1,591,229	[2],[3]
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	58,806		84,022
Charge-offs	(2,372)		(25,321)
Recoveries	1,303		7,702
Allowance for Loan and Lease Losses, Net charge-offs	(1,069)	(537)	(17,619)	(38,117)
Provision	9,907		1,241
Balance, end of period	67,644		67,644
Amount of the allowance applicable to loans and leases:
impairment	20,363		20,363
impairment	47,281		47,281
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	79,493		79,493
impairment	7,072,565		7,072,565
Ending balance of loans and leases	7,152,058		7,152,058
Commercial | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		88,364		93,853
Charge-offs		(4,984)		(46,965)
Recoveries		4,447		8,848
Provision		14,366		46,457
Balance, end of period	102,193	102,193	102,193	102,193
Amount of the allowance applicable to loans and leases:
impairment		15,012		15,012
impairment		87,181		87,181
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment		94,078		94,078
impairment		7,767,614		7,767,614
Ending balance of loans and leases		7,861,692		7,861,692	7,114,920	[2],[3]
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,656		2,328
Charge-offs	(210)		(304)
Recoveries	41		136
Allowance for Loan and Lease Losses, Net charge-offs	(169)	(384)	(168)	(521)
Provision	246		(427)
Balance, end of period	1,733		1,733
Amount of the allowance applicable to loans and leases:
impairment	0		0
impairment	1,733		1,733
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	0		0
impairment	398,471		398,471
Ending balance of loans and leases	398,471		398,471
Consumer | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		2,075		2,092
Charge-offs		(413)		(625)
Recoveries		29		104
Provision		752		872
Balance, end of period	$ 2,443	2,443	$ 2,443	2,443
Amount of the allowance applicable to loans and leases:
impairment		17		17
impairment		2,426		2,426
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment		106		106
impairment		385,807		385,807
Ending balance of loans and leases		385,913		385,913	$ 409,567	[2],[3]
Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for Loan and Lease Losses, Net charge-offs		$ (1,063)		$ (40,199)

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

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Loans and Leases (Details 8) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 132,139			$ 139,456
Reserve for Unfunded Loan Commitments, Balance, beginning of period	35,361		$ 20,263	28,635	$ 17,523
Allowance for Credit Losses, Balance, beginning of period	167,500		166,221	168,091	174,761
Allowance for Loan and Lease Losses, Charge-offs	(3,308)			(33,696)
Reserve for Unfunded Loan Commitments, Charge-offs	0		0	0	0
Allowance for Credit Losses, Charge-offs	(3,308)		(6,007)	(33,696)	(55,575)
Allowance for Loan and Lease Loss, Recoveries	1,589			9,886
Reserve for Unfunded Loan Commitments, Recoveries	0		0	0	0
Allowance for Credit Losses, Recoveries	1,589		5,082	9,886	9,883
Allowance for Loan and Lease Losses, Net charge-offs	(1,719)		(925)	(23,810)	(45,692)
Reserve for Unfunded Loan Commitments, Net charge-offs	0		0	0	0
Allowance For Credit Losses, Net charge-offs	(1,719)		(925)	(23,810)	(45,692)
Allowance for Loan and Lease Losses, Provision (negative provision)	11,500			26,274
Reserve for Unfunded Commitments, Provision (negative provision)	0		(546)	(6,726)	(3,286)
Allowance for Credit Losses, Provision (negative provision)	11,500	$ 17,500	15,119	33,000	51,346
Balance, end of period	141,920	132,139		141,920
Reserve for Unfunded Loan Commitments, Balance, end of period	35,361	35,361	20,809	35,361	20,809
Allowance for Credit Losses, Balance, end of period	177,281	$ 167,500	180,415	177,281	180,415
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period			138,879	133,012	143,755
Allowance for Credit Losses, Balance, beginning of period			159,142		161,278
Allowance for Loan and Lease Losses, Charge-offs			(5,928)		(49,807)
Allowance for Credit Losses, Charge-offs			(5,928)		(49,807)
Allowance for Loan and Lease Loss, Recoveries			4,865		9,608
Allowance for Credit Losses, Recoveries			4,865		9,608
Allowance for Loan and Lease Losses, Net charge-offs			(1,063)		(40,199)
Allowance For Credit Losses, Net charge-offs			(1,063)		(40,199)
Allowance for Loan and Lease Losses, Provision (negative provision)			14,954		49,214
Allowance for Credit Losses, Provision (negative provision)			15,500		52,500
Balance, end of period	152,770		152,770	152,770	152,770
Allowance for Credit Losses, Balance, end of period			173,579		173,579
Purchased Credit Impaired Loans and Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period				6,444
Balance, beginning of period			7,079		13,483
Allowance for Loan and Lease Losses, Charge-offs			(79)		(5,768)
Allowance for Loan and Lease Loss, Recoveries			217		275
Allowance for Loan and Lease Losses, Net charge-offs			138		(5,493)
Allowance for Loan and Lease Losses, Provision (negative provision)			(381)		(1,154)
Balance, end of period	$ 6,836		$ 6,836	$ 6,836	$ 6,836

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Loans and Leases (Details Textual) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018 USD ($) Contract	Sep. 30, 2017 USD ($) Contract	Sep. 30, 2018 USD ($) Contract		Sep. 30, 2017 USD ($) Contract	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pre-Modification Outstanding Recorded Investment		$ 57,736	$ 29,018	$ 76,517		$ 63,597
Post-Modification Outstanding Recorded Investment		$ 60,187	$ 19,226	$ 77,909		$ 53,097
Number of Loans | Contract		0	0	0		0
Nonaccrual loans and leases		$ 112,972		$ 112,972			$ 155,784	[1]
Receivable, 90 or more days past due		14,315		14,315			14,200
Receivable, 30-89 days past due		18,221		18,221			3,200
Financing receivable, nonaccrual status, current							138,400
Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		83,200		$ 83,200
Percentage of nonaccrual loans and leases				73.70%
Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	[2]						155,784
Receivable, 90 or more days past due	[3]						14,165
Receivable, 30-89 days past due	[3]						48,435
Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable, 90 or more days past due		14,300		$ 14,300
Receivable, 30-89 days past due		1,600		1,600
Financing receivable, nonaccrual status, current		97,000		97,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		79,718		79,718
Receivable, 90 or more days past due		4,876		4,876
Receivable, 30-89 days past due		1,250		1,250
Commercial | Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	[1],[2]						86,851
Receivable, 90 or more days past due							3,036
Receivable, 30-89 days past due							9,723
Commercial | Asset Based
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pre-Modification Outstanding Recorded Investment		28,947	$ 0	28,947	[4]	$ 665
Post-Modification Outstanding Recorded Investment		33,947	$ 0	33,947	[4]	$ 665
Nonaccrual loans and leases		34,619		34,619
Receivable, 90 or more days past due		655		655
Receivable, 30-89 days past due		$ 0		0
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	[2]						33,553
Receivable, 90 or more days past due							690
Receivable, 30-89 days past due							$ 344
Commercial Asset Based Loan [Member] | Commercial | Asset Based
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pre-Modification Outstanding Recorded Investment	[4]			27,300
Post-Modification Outstanding Recorded Investment	[4]			$ 32,300

[1] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[2] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[3] Excludes loans held for sale carried at lower of cost or fair value and PCI loans.

[4] One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was a restructuring of a loan secured by oil services equipment that was originally restructured in 2015 after being placed on nonaccrual status. The loan has since been extended four times, the last in the fourth quarter of 2017. As part of the current restructuring, additional funds were advanced in exchange for the receipt of additional equipment collateral and a partial personal guaranty.

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Foreclosed Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Total other real estate owned, net	$ 4,407	$ 1,302
Other foreclosed assets	0	27
Foreclosed assets, net	4,407	1,329
Construction and land development
Total other real estate owned, net	219	219
Multi‑family
Total other real estate owned, net	1,059	0
Single family residence
Total other real estate owned, net	953	1,019
Commercial real estate
Total other real estate owned, net	$ 2,176	$ 64

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Foreclosed Assets (Details 1) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Other Real Estate Owned Net Covered and NonCovered Including Foreclosed Assets [Abstract]
Balance, beginning of period	$ 1,329
Loans transferred to foreclosed assets	3,235	$ 580
Provision for losses	(65)
Reductions related to sales	(92)
Balance, end of period	$ 4,407

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Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Other Assets [Abstract]
Cash Surrender Value of Life Insurance	$ 195,547		$ 193,917
Interest and fees receivable income	82,980		82,935
Income Taxes Receivable	30,491		98,998
Equity Method Investments, Other Asset Investments	56,396	$ 1,200	49,432
Low Income Housing Tax Credit - LIHTC	55,356		39,235
Equity Investments Without Readily Determinable Fair Value	14,731		14,856
Equity Investments With Readily Determinable Fair Value	6,552		0
Prepaid Expense	19,341		17,800
Other Assets, Miscellaneous	33,128		43,550
Other Assets	$ 494,522		$ 540,723

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Other Assets (Details Textual)	9 Months Ended
	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Other Investment Not Readily Marketable [Line Items]
Equity Method Investments, Other Asset Investments	$ 56,396,000	$ 1,200,000	$ 49,432,000
Equity Method Investment, Number Sold	1
Equity Method Investment, Amount Sold	$ 286,000
Equity Method Investment, Other than Temporary Impairment	5,900,000
Other Assets, Miscellaneous	$ 33,128,000		$ 43,550,000

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Borrowings and Subordinated Debentures (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Borrowings	$ 1,513,166	$ 467,342
Non‑recourse debt
Debt Instrument [Line Items]
Amount	$ 166	$ 342
Rate	7.23%	6.87%
AFX borrowings
Debt Instrument [Line Items]
Amount	$ 235,000	$ 0
Rate	2.34%	0.00%
Federal Home Loan Bank of San Francisco | FHLB secured advances
Debt Instrument [Line Items]
Amount	$ 1,135,000	$ 332,000
Rate	2.33%	1.41%
Federal Home Loan Bank of San Francisco | FHLB unsecured overnight advance
Debt Instrument [Line Items]
Amount	$ 143,000	$ 135,000
Rate	2.30%	1.34%

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Borrowings and Subordinated Debentures (Details 1) $ in Thousands, € in Millions		9 Months Ended
		Sep. 30, 2018 USD ($)	Sep. 30, 2018 EUR (€)	Dec. 31, 2017 USD ($)
Subordinated Borrowing [Line Items]
Amount		$ 541,697		$ 555,146
Date Issued		Jun. 30, 2006
Maturity Date		Sep. 18, 2036
Unamortized discount	[1]	$ (88,753)		(92,709)
Net subordinated debentures		$ 452,944		462,437
Description of variable rate basis		3 month LIBOR + 1.85
Subordinated Debt Trust V Due September 2033
Subordinated Borrowing [Line Items]
Amount		$ 10,310		$ 10,310
Rate		5.43%	5.43%	4.70%
Date Issued		Aug. 15, 2003
Maturity Date		Sep. 17, 2033
Description of variable rate basis		3 month LIBOR + 3.10
Subordinated Debt Trust VI Due September 2033
Subordinated Borrowing [Line Items]
Amount		$ 10,310		$ 10,310
Rate		5.38%	5.38%	4.64%
Date Issued		Sep. 03, 2003
Maturity Date		Sep. 15, 2033
Description of variable rate basis		3 month LIBOR + 3.05
Subordinated Debt Trust CII Due September 2033
Subordinated Borrowing [Line Items]
Amount		$ 5,155		$ 5,155
Rate		5.28%	5.28%	4.55%
Date Issued		Sep. 17, 2003
Maturity Date		Sep. 17, 2033
Description of variable rate basis		3 month LIBOR + 2.95
Subordinated Debt Trust VII Due April 2034
Subordinated Borrowing [Line Items]
Amount		$ 61,856		$ 61,856
Rate		5.09%	5.09%	4.13%
Date Issued		Feb. 05, 2004
Maturity Date		Apr. 23, 2034
Description of variable rate basis		3 month LIBOR + 2.75
Subordinated Debt Trust CIII Due September 2035
Subordinated Borrowing [Line Items]
Amount		$ 20,619		$ 20,619
Rate		4.02%	4.02%	3.28%
Date Issued		Aug. 15, 2005
Maturity Date		Sep. 15, 2035
Description of variable rate basis		3 month LIBOR + 1.69
Subordinated Debt Trust FCCI Due March 2037
Subordinated Borrowing [Line Items]
Amount		$ 16,495		$ 16,495
Rate		3.93%	3.93%	3.19%
Date Issued		Jan. 25, 2007
Maturity Date		Mar. 15, 2037
Description of variable rate basis		3 month LIBOR + 1.60
Subordinated Debt Trust FCBI Due December 2035
Subordinated Borrowing [Line Items]
Amount		$ 10,310		$ 10,310
Rate		3.88%	3.88%	3.14%
Date Issued		Sep. 30, 2005
Maturity Date		Dec. 15, 2035
Description of variable rate basis		3 month LIBOR + 1.55
Trust Preferred Securities Two Thousand Five Series One
Subordinated Borrowing [Line Items]
Amount		$ 82,475		$ 82,475
Rate		4.28%	4.28%	3.54%
Date Issued		Nov. 21, 2005
Maturity Date		Dec. 15, 2035
Description of variable rate basis		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Five Series Two
Subordinated Borrowing [Line Items]
Amount		$ 128,866		$ 128,866
Rate		4.29%	4.29%	3.33%
Date Issued		Dec. 14, 2005
Maturity Date		Jan. 30, 2036
Description of variable rate basis		3 month LIBOR + 1.95
Two Thousand Six One Term Debt Securitization
Subordinated Borrowing [Line Items]
Amount		$ 51,545		$ 51,545
Rate		4.29%	4.29%	3.33%
Date Issued		Feb. 22, 2006
Maturity Date		Apr. 30, 2036
Description of variable rate basis		3 month LIBOR + 1.95
Two Thousand Six Two Term Debt Securitization
Subordinated Borrowing [Line Items]
Amount		$ 51,550		$ 51,550
Rate		4.29%	4.29%	3.33%
Date Issued		Sep. 27, 2006
Maturity Date		Oct. 30, 2036
Description of variable rate basis		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Amount	[2]	$ 29,909		$ 30,986
Rate		1.69%	1.69%	1.72%
Date Issued		Sep. 29, 2006
Maturity Date		Oct. 30, 2036
Denomination value | €			€ 25.8
Description of variable rate basis		3 month EURIBOR + 2.05
Trust Preferred Securities Two Thousand Six Series Four
Subordinated Borrowing [Line Items]
Amount		$ 16,470		$ 16,470
Rate		4.29%	4.29%	3.33%
Date Issued		Dec. 05, 2006
Maturity Date		Jan. 30, 2037
Description of variable rate basis		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Five
Subordinated Borrowing [Line Items]
Amount		$ 6,650		$ 6,650
Rate		4.29%	4.29%	3.33%
Date Issued		Dec. 19, 2006
Maturity Date		Jan. 30, 2037
Description of variable rate basis		3 month LIBOR + 1.95
Two Thousand Seven One Term Debt Securitization
Subordinated Borrowing [Line Items]
Amount		$ 39,177		$ 39,177
Rate		4.29%	4.29%	3.33%
Date Issued		Jun. 13, 2007
Maturity Date		Jul. 30, 2037
Description of variable rate basis		3 month LIBOR + 1.95
Subordinated Debentures Trust I Due March 2035 [Domain]
Subordinated Borrowing [Line Items]
Amount	[3]	$ 0		$ 6,186
Rate				3.64%
Date Issued		Dec. 10, 2004
Maturity Date		Mar. 15, 2035
Description of variable rate basis		3 month LIBOR + 2.05
Subordinated Debentures Trust II Due March 2036 [Member]
Subordinated Borrowing [Line Items]
Amount	[3]	$ 0		$ 3,093
Rate				3.34%
Date Issued		Dec. 23, 2005
Maturity Date		Mar. 15, 2036
Description of variable rate basis		3 month LIBOR + 1.75
Subordinated Debentures Trust III Due September 2036 [Member]
Subordinated Borrowing [Line Items]
Amount	[3]	$ 0		$ 3,093
Rate				3.44%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust V Due September 2033
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		3.10%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust VI Due September 2033
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		3.05%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust CII Due September 2033
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.95%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust VII Due April 2034
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.75%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust CIII Due September 2035
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.69%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust FCCI Due March 2037
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.60%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust FCBI Due December 2035
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.55%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Five Series One
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Five Series Two
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Two Thousand Six One Term Debt Securitization
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Two Thousand Six Two Term Debt Securitization
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Six Series Four
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Six Series Five
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Two Thousand Seven One Term Debt Securitization
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.95%
London Interbank Offered Rate (LIBOR) | Subordinated Debentures Trust I Due March 2035 [Domain]
Subordinated Borrowing [Line Items]
Rate		0.00%	0.00%
London Interbank Offered Rate (LIBOR) | Subordinated Debentures Trust II Due March 2036 [Member]
Subordinated Borrowing [Line Items]
Rate		0.00%	0.00%
London Interbank Offered Rate (LIBOR) | Subordinated Debentures Trust III Due September 2036 [Member]
Subordinated Borrowing [Line Items]
Rate		0.00%	0.00%
Euribor Rate | Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.05%

[1] Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions.

[2] Denomination is in Euros with a value of €25.8 million.

[3] Acquired in the CUB acquisition on October 20, 2017 and redeemed in the first quarter of 2018.

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Borrowings and Subordinated Debentures (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Non‑recourse debt
Debt Instrument [Line Items]
Weighted average remaining maturity period	13 months
Unused Lines of Credit
Debt Instrument [Line Items]
Amount outstanding	$ 0
Current borrowing capacity	125,000,000
Unused commitment fees	0
AFX borrowings
Debt Instrument [Line Items]
Amount outstanding	235,000,000	$ 0
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Loans pledged as collateral	2,800,000,000
Amount outstanding	0	0
Federal Reserve Bank Advances | FHLB secured advances
Debt Instrument [Line Items]
Borrowing capacity description	2,073,375,000
Federal Home Loan Bank of San Francisco
Debt Instrument [Line Items]
Loans pledged as collateral	5,200,000,000
Federal Home Loan Bank of San Francisco | FHLB secured advances
Debt Instrument [Line Items]
Borrowing capacity description	3,587,256,000
Current outstanding	1,135,000,000	332,000,000
Federal Home Loan Bank of San Francisco | FHLB unsecured overnight advance
Debt Instrument [Line Items]
Current outstanding	143,000,000	135,000,000
Federal Home Loan Bank of San Francisco | Unused Lines of Credit
Debt Instrument [Line Items]
Borrowing capacity description	143,000,000
Maturity Overnight [Member] | AFX borrowings
Debt Instrument [Line Items]
Amount outstanding	225,000,000
Short-term Debt [Member] | AFX borrowings
Debt Instrument [Line Items]
Amount outstanding	10,000,000
Maturity Overnight [Member] | Federal Home Loan Bank of San Francisco
Debt Instrument [Line Items]
Current outstanding	$ 1,100,000,000	$ 332,000,000

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Commitments and Contingencies (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Loan commitments to extend credit	$ 7,055,833	$ 6,234,061
Standby letters of credit	335,651	320,063
Total	$ 7,391,484	$ 6,554,124

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Commitments and Contingencies (Details Textual) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Long-term Purchase Commitment [Line Items]
Commitment to contribute capital	$ 104,600,000	$ 62,600,000
Private Equity Funds
Long-term Purchase Commitment [Line Items]
Remaining minimum amount committed	$ 403,000	$ 2,500,000

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Fair Value Measurements (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	$ 3,820,333	$ 3,774,431
Equity warrants		5,161
Fair Value, Estimate Not Practicable, Equity Method Investments	6,552
Derivative Liability	468	1,379
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		5,922
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		3,703,526
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		64,983
Government agency and government-sponsored enterprise pass through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	249,831	246,274
Government agency and government-sponsored enterprise collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	569,605	275,709
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,271,583	1,680,068
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,077,005	1,163,969
US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	397,631	0
SBA asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	67,586	160,334
Asset-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	58,452	88,710
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	18,190	19,295
Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	7,015
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	7,070
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	3,820,333	3,774,431
Equity warrants	4,962	5,161
Other derivative assets	2,072	1,873
Total recurring assets	3,833,919	3,781,465
Derivative liabilities	468	1,379
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	397,631	5,922
Equity warrants	0	0
Other derivative assets	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	6,552
Total recurring assets	404,183	5,922
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	3,380,480	3,703,526
Equity warrants	0	0
Other derivative assets	2,072	1,873
Fair Value, Estimate Not Practicable, Equity Method Investments	0
Total recurring assets	3,382,552	3,705,399
Derivative liabilities	468	1,379
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	42,222	64,983
Equity warrants	4,962	5,161
Other derivative assets	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	0
Total recurring assets	47,184	70,144
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	249,831	246,274
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	249,831	246,274
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	569,605	275,709
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	569,605	275,709
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	110,450	125,987
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	97,327	103,113
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	13,123	22,874
Fair Value, Measurements, Recurring | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,271,583	1,680,068
Fair Value, Measurements, Recurring | Municipal securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Municipal securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,271,583	1,680,068
Fair Value, Measurements, Recurring | Municipal securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,077,005	1,163,969
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,077,005	1,163,969
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	397,631
Fair Value, Measurements, Recurring | US Treasury Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	397,631
Fair Value, Measurements, Recurring | US Treasury Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0
Fair Value, Measurements, Recurring | US Treasury Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0
Fair Value, Measurements, Recurring | SBA asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	67,586	160,334
Fair Value, Measurements, Recurring | SBA asset-backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | SBA asset-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	67,586	160,334
Fair Value, Measurements, Recurring | SBA asset-backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Asset-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	58,452	88,710
Fair Value, Measurements, Recurring | Asset-backed | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Asset-backed | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	29,353	46,601
Fair Value, Measurements, Recurring | Asset-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	29,099
Fair Value, Measurements, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	18,190	19,295
Fair Value, Measurements, Recurring | Corporate debt securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Corporate debt securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	18,190	19,295
Fair Value, Measurements, Recurring | Corporate debt securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		7,015
Fair Value, Measurements, Recurring | Collateralized loan obligations | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		0
Fair Value, Measurements, Recurring | Collateralized loan obligations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		7,015
Fair Value, Measurements, Recurring | Collateralized loan obligations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		0
Fair Value, Measurements, Recurring | Equity Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		5,922
Fair Value, Measurements, Recurring | Equity Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		1,148
Fair Value, Measurements, Recurring | Equity Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		0
Square 1 Financial, Inc. | Fair Value, Measurements, Recurring | Asset-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale		$ 42,109
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 7,100

XML

Fair Value Measurements (Details 1) - Level 3 - Fair Value, Measurements, Recurring	9 Months Ended
	Sep. 30, 2018
Minimum | Private label collateralized mortgage obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	4.80%
Annual default rates	0.00%
Loss severity rates	5.20%
Discount rates	2.20%
Minimum | SBA securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	5.00%
Annual default rates	1.00%
Loss severity rates	10.00%
Discount rates	3.20%
Maximum | Private label collateralized mortgage obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	30.50%
Annual default rates	25.30%
Loss severity rates	135.50%
Discount rates	10.50%
Maximum | SBA securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	15.00%
Annual default rates	2.00%
Loss severity rates	60.00%
Discount rates	4.30%
Weighted Average | Covered Private Label Collateralized Mortgage Obligations Member [Domain]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	9.40%
Annual default rates	2.20%
Loss severity rates	47.30%
Discount rates	6.20%
Weighted Average | Private label collateralized mortgage obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	9.40%
Annual default rates	2.20%
Loss severity rates	47.30%
Discount rates	6.20%
Weighted Average | SBA securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	14.20%
Annual default rates	1.90%
Loss severity rates	55.90%
Discount rates	3.60%

XML

Fair Value Measurements (Details 2) - Weighted Average - Warrant - Fair Value, Measurements, Recurring - Level 3	9 Months Ended
	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Volatility	16.30%
Risk-free interest rate	2.90%
Remaining life assumption (in years)	3 years 7 months 17 days

XML

Fair Value Measurements (Details 3)	9 Months Ended
	Sep. 30, 2018 USD ($)
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	$ 5,161,000
Level 3
Level 3 CMO [Roll Forward]
Total included in earnings, Equity Warrants	5,291,000
Total included in other comprehensive income	0
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	557,000
Sales, Equity Warrants	(5,972,000)
Net settlements, Equity Warrants	0
Fair Value, Measurements, Recurring
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	5,161,000
Equity warrants, Balance, end of period	4,962,000
Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	5,161,000
Equity warrants, Balance, end of period	4,962,000
Private Label CMOs | Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	22,874,000
Total included in earnings	595,000
Total included in other comprehensive income	(511,000)
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0
Net settlements	(9,835,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	13,123,000
Asset-backed | Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	42,109,000
Total included in earnings	(35,000)
Total included in other comprehensive income	220,000
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0
Net settlements	(13,195,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	29,099,000
Private label collateralized mortgage obligations
Level 3 CMO [Roll Forward]
Fair value transfers of assets measured on a recurring basis	0
SBA securities
Level 3 CMO [Roll Forward]
Fair value transfers of assets measured on a recurring basis	0
Warrant
Level 3 CMO [Roll Forward]
Fair value transfers of assets measured on a recurring basis	$ 75,000

XML

Fair Value Measurements (Details 4) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 42,056	$ 544,658
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	16,376	488,706
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	25,680	55,952
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	41,103	61,095
Non Purchased Credit Impaired Loans and Leases | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Non Purchased Credit Impaired Loans and Leases | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	15,423	5,143
Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	25,680	55,952
Other real estate and foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	953	483,563
Other real estate and foreclosed assets | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate and foreclosed assets | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	953	483,563
Third party appraisals | Other real estate and foreclosed assets | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 0	$ 0

XML

Fair Value Measurements (Details 5) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total losses	$ 14,347	$ 6,551	$ 31,416	$ 20,019
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total losses	14,347	4,427	31,351	17,895
Other real estate and foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total losses	$ 0	$ 2,124	$ 65	$ 2,124

XML

Fair Value Measurements (Details 6) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 42,056	$ 544,658
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	25,680	55,952
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	41,103	61,095
Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	25,680	$ 55,952
Discount Rates | Discounted Cash Flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	12,531
No Discounts | Internal enterprise value methodology | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,819
No Discounts | Third party appraisals | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 6,330
Minimum | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	3.75%
Maximum | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	7.75%
Weighted Average | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	6.81%
Weighted Average | Discount Rates | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	6.81%

XML

Fair Value Measurements (Details 7) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 42,056	$ 544,658
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	25,680	55,952
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	41,103	61,095
Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 25,680	$ 55,952
Minimum | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates, Weighted Average	3.75%
Maximum | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates, Weighted Average	7.75%
Weighted Average | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates, Weighted Average	6.81%
Discount Rates | Discounted Cash Flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 12,531
Discount Rates | Weighted Average | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates, Weighted Average	6.81%
No Discounts | Internal enterprise value methodology | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 6,819
No Discounts | Third party appraisals | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 6,330

XML

Fair Value Measurements (Details 8) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 196,502	$ 233,215
Interest-earning deposits in financial institutions	185,284	165,222
Securities available-for-sale, Carrying Amount		3,774,431
Securities available-for-sale, at fair value	3,820,333	3,774,431
Investment in FHLB stock, Carrying Amount	31,077	20,790
Investment in FHLB stock, Fair Value	31,077	20,790
Loans held for sale, at lower of cost or fair value	0	481,100
Loans Held-for-sale, Fair Value Disclosure		483,563
Loans and leases, net	17,088,226	16,833,287
Loans and leases held for investment, net	16,876,611
Warrants and Rights Outstanding		5,161
Equity warrants		5,161
Other derivative assets, Carrying Amount	2,072	1,873
Fair Value, Estimate Not Practicable, Equity Method Investments	6,552
Demand, interest checking, money market, and savings deposits	15,512,742	15,937,012
Interest-bearing Domestic Deposit, Brokered	483,528	863,202
Time deposits	1,883,273	2,065,322
Time deposits	1,894,024	2,055,104
Borrowings	1,513,166	467,342
Borrowings	1,513,163	467,342
Subordinated debentures	452,944	462,437
Subordinated debentures	435,505	444,383
Derivative Liability	468	1,379
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	196,502	233,215
Interest-earning deposits in financial institutions	185,284	165,222
Securities available-for-sale, at fair value		5,922
Investment in FHLB stock, Fair Value	0	0
Demand, interest checking, money market, and savings deposits	0	0
Interest-bearing Domestic Deposit, Brokered	0	0
Time deposits	0	0
Borrowings	1,503,000	467,000
Subordinated debentures	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-earning deposits in financial institutions	0	0
Securities available-for-sale, at fair value		3,703,526
Investment in FHLB stock, Fair Value	31,077	20,790
Demand, interest checking, money market, and savings deposits	15,512,742	15,937,012
Interest-bearing Domestic Deposit, Brokered	483,528	863,202
Time deposits	1,894,024	2,055,104
Borrowings	10,163	342
Subordinated debentures	435,505	444,383
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-earning deposits in financial institutions	0	0
Securities available-for-sale, at fair value		64,983
Investment in FHLB stock, Fair Value	0	0
Loans and leases held for investment, net	16,861,188
Demand, interest checking, money market, and savings deposits	0	0
Interest-bearing Domestic Deposit, Brokered	0	0
Time deposits	0	0
Borrowings	0	0
Subordinated debentures	0	0
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value	3,820,333	3,774,431
Equity warrants	4,962	5,161
Other derivative assets, Fair Value	2,072	1,873
Derivative liabilities	468	1,379
Fair Value, Measurements, Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value	397,631	5,922
Equity warrants	0	0
Other derivative assets, Fair Value	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	6,552
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value	3,380,480	3,703,526
Equity warrants	0	0
Other derivative assets, Fair Value	2,072	1,873
Fair Value, Estimate Not Practicable, Equity Method Investments	0
Derivative liabilities	468	1,379
Fair Value, Measurements, Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value	42,222	64,983
Equity warrants	4,962	5,161
Other derivative assets, Fair Value	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	0
Derivative liabilities	0	0
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Held-for-sale, Fair Value Disclosure		0
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Held-for-sale, Fair Value Disclosure		483,563
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Held-for-sale, Fair Value Disclosure		0
NonPCI and PCI Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases, net		16,833,287
Loans and leases held for investment, net		17,023,098
NonPCI and PCI Loans | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases held for investment, net	0	0
NonPCI and PCI Loans | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases held for investment, net	$ 15,423	5,143
NonPCI and PCI Loans | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases held for investment, net		$ 17,017,955

XML

Fair Value Measurements (Details Textual)	9 Months Ended
	Sep. 30, 2018 USD ($)
Private label collateralized mortgage obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	$ 0
Warrant
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	$ (75,000)

XML

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2018		Jun. 30, 2018		Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net earnings from continuing operations	$ 116,287		$ 115,735		$ 101,466		$ 350,298	$ 273,781
Less: Earnings allocated to unvested restricted stock	(1,428)	[1]	(1,348)	[1]	(1,149)	[1]	(3,899)	(3,239)
Net earnings allocated to common shares	$ 114,859		$ 114,387		$ 100,317		$ 346,399	$ 270,542
Weighted-average basic shares and unvested restricted stock outstanding (shares)	123,657		126,082		121,447		125,728	121,405
Weighted-average unvested restricted stock outstanding (shares)	(1,537)		(1,466)		(1,394)		(1,473)	(1,450)
Weighted-average basic shares outstanding (shares)	122,120		124,616		120,053		124,255	119,955
Basic net income per share (usd per share)	$ 0.94		$ 0.92		$ 0.84		$ 2.79	$ 2.26
Net earnings from continuing operations allocated to common shares	$ 114,859		$ 114,387		$ 100,317		$ 346,399	$ 270,542
Diluted net income per share (usd per share)	$ 0.94		$ 0.92		$ 0.84		$ 2.79	$ 2.26

[1] Represents cash dividends paid to holders of unvested restricted stock, net of forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

XML

Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Interest and Dividend Income, Operating	$ 292,642	$ 288,514	$ 260,966	$ 858,931	$ 767,919
Service charges on deposit accounts	3,979	4,265	3,465	12,418	10,733
Other commissions and fees	12,397	11,767	9,944	34,429	30,917
Operating Leases, Income Statement, Lease Revenue	9,120	9,790	8,332	28,497	29,442
Gain on sale of loans and leases	0	106	2,848	4,675	4,209
Other income	10,590	13,457	5,557	27,700	23,689
Total noninterest income	36,912	39,638	31,382	115,109	101,778
Revenues	329,554			974,040
Revenue from Contract with Customer, Excluding Assessed Tax	9,190			28,278
Gain (Loss) on Investments	826	$ 253	$ 1,236	7,390	$ 2,788
Interest Income
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0			0
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,979			12,418
Other commissions and fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,767			14,519
Leased equipment income
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0			0
Gain on sale of loans
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0			0
Gain on sale of securities
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0			0
Other income
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	444			1,341
Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 9,190			$ 28,278

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Revenue From Contracts With Customers (Details 1) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Revenue From Contracts With Customers [Abstract]
Products and services transferred at a point in time	$ 4,604	$ 14,195
Products and services transferred over time	4,586	14,083
Total revenue from contracts with customers	$ 9,190	$ 28,278

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Revenue From Contracts With Customers (Details 2) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Revenue From Contracts With Customers [Abstract]
Receivables, which are included in Other assets	$ 1,701
Contract assets, which are included in Other assets	0
Contract liabilities, which are included in Interest payable and other liabilities	$ 654

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Revenue From Contracts With Customers (Details Textual)	9 Months Ended
	Sep. 30, 2018 USD ($)
Revenue From Contracts With Customers [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 98,000

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Stock-Based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	1,529,273			1,529,273		1,436,120
Vesting period of time-based restricted stock, lower limit			3 years
Vesting period of time-based restricted stock, higher limit			4 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance vesting percentage				0.00%
Performance Target 1 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance vesting percentage				150.00%
Performance Target 2 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance vesting percentage				200.00%
Restricted Stock | Vesting Based On Service
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 8.1	$ 6.9	$ 6.5	$ 22.3	$ 19.6
Restricted Stock Awards And Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share based compensation expense	$ 59.3			$ 59.3
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	325,741			325,741
Performance period				3 years
PacWest 2003 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (shares)	4,000,000			4,000,000
Number of shares available for grant (shares)	3,138,923			3,138,923
PacWest 2003 Stock Incentive Plan | Time-Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	1,529,273			1,529,273

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Recently Issued Accounting Standards (Details) $ in Millions	Sep. 30, 2018 USD ($)
Minimum
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset	$ 120
Maximum
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset	$ 140

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Subsequent Events (Details Textuals) - $ / shares		3 Months Ended
	Nov. 01, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Subsequent Event [Line Items]
Dividends declared per share (usd per share)		$ 0.60	$ 0.60	$ 0.50	$ 0.50	$ 0.50	$ 0.50
Subsequent Event | Dividend Declared
Subsequent Event [Line Items]
Dividends declared per share (usd per share)	$ 0.60