Pacwest Bancorp (PACW) 10-Q 9 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	PACWEST BANCORP
Entity Central Index Key	0001102112
Document Period End Date	Mar. 31, 2019
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		118,833,032

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS:
Cash and due from banks	$ 224,758	$ 175,830
Interest-earning deposits in financial institutions	332,124	209,937
Total cash, cash equivalents, and restricted cash	556,882	385,767
Securities available-for-sale, at fair value	3,994,708	4,009,431
Federal Home Loan Bank stock, at cost	29,430	32,103
Total investment securities	4,024,138	4,041,534
Loans held for sale	25,124	0
Gross loans and leases held for investment	18,371,295	18,026,365
Deferred fees, net	(63,598)	(68,652)
Allowance for loan and lease losses	(136,281)	(132,472)
Total loans and leases held for investment, net	18,171,416	17,825,241
Equipment leased to others under operating leases	293,853	292,677
Premises and equipment, net	37,783	34,661
Foreclosed assets, net	3,291	5,299
Deferred tax asset, net	0	17,489
Goodwill	2,548,670	2,548,670
Core deposit and customer relationship intangibles, net	52,250	57,120
Other assets	610,731	522,896
Total assets	26,324,138	25,731,354
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits	7,712,409	7,888,915
Interest-bearing deposits	11,573,518	10,981,586
Total deposits	19,285,927	18,870,501
Borrowings	1,481,087	1,371,114
Subordinated debentures	454,458	453,846
Accrued interest payable and other liabilities	311,684	210,305
Total liabilities	21,533,156	20,905,766
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 March 31, 2019 and December 31, 2018; 122,204,565 and 125,079,705 shares issued, respectively, including 1,241,543 and 1,888,872 shares of unvested restricted stock, respectively)	1,222	1,251
Additional paid-in capital	3,535,793	3,722,723
Retained earnings	1,296,216	1,182,674
Treasury stock, at cost (2,003,416 and 1,889,872 shares at March 31, 2019 and December 31, 2018)	(79,507)	(74,985)
Accumulated other comprehensive income (loss), net	37,258	(6,075)
Total stockholders' equity	4,790,982	4,825,588
Total liabilities and stockholders' equity	$ 26,324,138	$ 25,731,354

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
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)	122,204,565	125,079,705
Unvested restricted shares (shares)	1,241,543	1,889,872
Treasury Stock (shares)	2,003,416	1,889,872

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Interest income:
Loans and leases	$ 274,229	$ 272,522	$ 251,085
Investment securities	29,680	29,690	26,138
Deposits in financial institutions	650	527	552
Total interest income	304,559	302,739	277,775
Interest expense:
Deposits	34,235	28,834	13,818
Borrowings	7,710	4,602	920
Subordinated debentures	7,738	7,538	6,537
Total interest expense	49,683	40,974	21,275
Net interest income	254,876	261,765	256,500
Provision for credit losses	4,000	12,000	4,000
Net interest income after provision for credit losses	250,876	249,765	252,500
Noninterest income:
Other commissions and fees	11,008	11,114	10,265
Leased equipment income	9,282	9,384	9,587
Service charges on deposit accounts	3,730	4,091	4,174
Gain on sale of loans and leases	0	0	4,569
Gain on sale of securities	2,161	786	6,311
Other income	4,883	8,151	3,653
Total noninterest income	31,064	33,526	38,559
Noninterest expense:
Compensation	70,845	69,299	71,023
Occupancy	14,320	13,356	13,223
Data processing	6,925	6,930	6,659
Leased equipment depreciation	5,651	5,758	5,375
Intangible asset amortization	4,870	4,986	6,346
Other professional services	4,513	6,198	4,439
Insurance and assessments	4,038	4,202	5,727
Loan expense	2,885	2,991	2,271
Acquisition, integration and reorganization costs	618	970	0
Foreclosed assets expense (income), net	29	(311)	(122)
Other expense	11,593	14,856	12,454
Total noninterest expense	126,287	129,235	127,395
Earnings before income taxes	155,653	154,056	163,664
Income tax expense	(43,049)	(39,015)	(45,388)
Net earnings	$ 112,604	$ 115,041	$ 118,276
Earnings per share:
Net earnings (usd per share)	$ 0.92	$ 0.93	$ 0.93
Net earnings (usd per share)	$ 0.92	$ 0.93	$ 0.93

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings		$ 112,604	$ 115,041	$ 118,276
Other comprehensive income (loss), net of tax:
Unrealized net holding gains (losses) on securities available-for-sale arising during the period		62,639	53,702	(62,669)
Income tax (expense) benefit related to unrealized holding gains (losses) arising during the period		(17,758)	(15,362)	17,931
Unrealized net holding gains (losses) on securities available-for-sale, net of tax		44,881	38,340	(44,738)
Reclassification adjustment for net (gains) losses included in net earnings	[1]	(2,161)	(786)	(6,311)
Income tax expense (benefit) related to reclassification adjustment		613	225	1,806
Reclassification adjustment for net (gains) losses included in net earnings, net of tax		(1,548)	(561)	(4,505)
Other comprehensive income (loss), net of tax		43,333	37,779	(49,243)
Comprehensive income		$ 155,937	$ 152,820	$ 69,033
[1]	Entire amounts are recognized in "Gain on sale of securities" on the Condensed Consolidated Statements of Earnings.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)		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, 2017		$ 4,977,598,000	$ 1,305,000	$ 4,287,487,000	$ 723,471,000	$ (65,836,000)		$ 31,171,000
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			(6,136,000)			6,136,000
Net earnings		118,276,000			118,276,000
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		(49,243,000)						(49,243,000)
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			96,034
Restricted stock awarded and earned stock compensation, net of shares forfeited		7,199,000	$ 1,000	7,198,000
Restricted stock surrendered (shares)			(55,186)				(2,285,855)
Restricted stock surrendered		(2,858,000)				(2,858,000)
Common stock repurchased under Stock Repurchase Program		(23,000)
Common stock repurchased under Stock Repurchase Program		(119,793,000)		(119,770,000)
Cash dividends paid		(63,689,000)		(63,689,000)
Ending Period Balance at Mar. 31, 2018		$ 4,867,490,000	$ 1,283,000	4,111,226,000	835,611,000	(68,694,000)		(11,936,000)
Shares outstanding, ending balance (shares) at Mar. 31, 2018			126,537,871
Dividends declared per share (usd per share)		$ 0.60
Beginning Period Balance at Dec. 31, 2018		$ 4,825,588,000	$ 1,251,000	3,722,723,000	1,182,674,000	(74,985,000)		(6,075,000)
Shares outstanding, beginning balance (shares) at Dec. 31, 2018			123,189,833
Stockholders' Equity Disclosure [Rollforward]
Cumulative effect of change in accounting principle	[1]	938,000			938,000
Net earnings		112,604,000			112,604,000
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax		43,333,000						43,333,000
Restricted stock awarded and earned compensation, net of shares forfeited (shares)			195,536
Restricted stock awarded and earned stock compensation, net of shares forfeited		5,808,000	$ 2,000	5,806,000
Restricted stock surrendered (shares)			(113,544)				(3,070,676)
Restricted stock surrendered		(4,522,000)				(4,522,000)
Common stock repurchased under Stock Repurchase Program		(31,000)
Common stock repurchased under Stock Repurchase Program		(119,587,000)		(119,556,000)
Cash dividends paid		(73,180,000)		(73,180,000)
Ending Period Balance at Mar. 31, 2019		$ 4,790,982,000	$ 1,222,000	$ 3,535,793,000	$ 1,296,216,000	$ (79,507,000)		$ 37,258,000
Shares outstanding, ending balance (shares) at Mar. 31, 2019			120,201,149
[1]	Three Months Ended March 31, 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, 2017128,782,878 $1,305 $4,287,487 $723,471 $(65,836) $31,171 $4,977,598Cumulative effect of changes in accounting principles (2)— — — (6,136) — 6,136 —Net earnings— — — 118,276 — — 118,276Other 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 forfeited96,034 1 7,198 — — — 7,199Restricted 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, 2018126,537,871 $1,283 $4,111,226 $835,611 $(68,694) $(11,936) $4,867,490

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Cash flows from operating activities:
Net earnings	$ 112,604		$ 118,276
Depreciation and amortization	9,287		8,751
Amortization of net premiums on securities available-for-sale	4,142		8,432
Amortization of intangible assets	4,870	$ 4,986	6,346
Amortization of ROU assets	7,608		0
Provision for credit losses	4,000	12,000	4,000
Gain on sale of foreclosed assets	(191)		0
Provision for losses on foreclosed assets	0		65
Gain on sale of loans and leases	0	0	(4,569)
Loss on sale of premises and equipment	3		7
Gain on sale of securities	(2,161)		(6,311)
Unrealized loss (gain) on derivatives and foreign currencies, net	16		(605)
Earned stock compensation	5,808		7,199
Decrease in deferred income taxes, net	14,714		7,153
Decrease in other assets	37,434		38,208
Decrease in accrued interest payable and other liabilities	(46,241)		(50,969)
Net cash provided by operating activities	151,893		135,983
Cash flows from investing activities:
Net (increase) decrease in loans and leases	(391,621)		382,590
Proceeds from sales of loans and leases	16,937		615,376
Proceeds from maturities and paydowns of securities available-for-sale	67,325		75,125
Proceeds from sales of securities available-for-sale	407,926		306,253
Purchases of securities available-for-sale	(402,030)		(487,105)
Net redemptions of Federal Home Loan Bank stock	2,673		3,540
Proceeds from sales of foreclosed assets	2,236		28
Purchases of premises and equipment, net	(5,625)		(3,997)
Net decrease in equipment leased to others under operating leases	(6,709)		(1,241)
Net cash (used in) provided by investing activities	(308,888)		890,569
Cash flows from financing activities:
Net decrease in noninterest-bearing deposits	(176,506)		(275,579)
Net increase (decrease) in interest-bearing deposits	591,932		(510,844)
Net increase in borrowings	109,973		107,942
Net decrease in subordinated debentures	0		(12,372)
Common stock repurchased and restricted stock surrendered	(124,109)		(122,651)
Cash dividends paid	(73,180)		(63,689)
Net cash provided by (used in) financing activities	328,110		(877,193)
Net increase in cash, cash equivalents, and restricted cash	171,115		149,359
Cash, cash equivalents, and restricted cash, beginning of period	385,767		398,437
Cash, cash equivalents, and restricted cash, end of period	556,882	$ 385,767	547,796
Supplemental disclosures of cash flow information:
Cash paid for interest	46,197		17,515
Cash paid for income taxes	2,778		3,790
Loans transferred to foreclosed assets	37		0
Transfers from loans held for investment to loans held for sale	$ 25,124		$ 0

Organization

Organization	3 Months Ended
	Mar. 31, 2019
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. 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 across the country through its Community Banking, National Lending and Venture Banking groups. Community Banking provides real estate loans, commercial loans, and comprehensive deposit and treasury management services to small and medium-sized businesses conducted primarily through our California-based branch offices. 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 Pacific Western 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 interest paid by the Bank on deposits and borrowings, compensation, occupancy, and general operating expenses. We have completed 29 acquisitions from May 1, 2000 through March 31, 2019 . 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. 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, 2018 as filed with the Securities and Exchange Commission ("Form 10-K"). Accounting Standards Adopted in 2019 Effective January 1, 2019, the Company adopted ASU 2016-02, " Leases (Topic 842), " and the related amendments to this new standard issued in 2018. ASU 2016-02 supersedes Topic 840, “ Leases,” and is intended to increase transparency and comparability among organizations by requiring the recognition of right-of-use (“ROU”) assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of the financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted the new standard using the optional transition method under ASU 2018-11, “ Leases (Topic 842): Targeted Improvements, ” and recognized a cumulative effect adjustment to increase retained earnings by $938,000 , net of taxes, without restating prior periods and applying the requirements of the new standard prospectively. The Company has elected the following practical expedients: (1) to not separate lease and non-lease components for facilities leases; (2) to not reassess whether any expired or existing contracts are or contain leases and to maintain existing lease classifications; (3) to not record short-term leases (initial term less than 12 months) on the balance sheet; and (4) to elect to present sales tax on a net basis for those transactions in which the Company's the lessor. The standard had a significant impact on our condensed consolidated balance sheet, but did not have a significant impact on our condensed consolidated statement of earnings. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases, while the accounting for leases as a lessor remained substantially unchanged. The ROU asset is included within "Other assets," while the ROU liability is included within "Accrued interest payable and other liabilities". See Note 8. Leases and Note 7. Other Assets for further details. Effective January 1, 2019, the Company early-adopted any removed or modified disclosures as permitted by ASU 2018-13, “ Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements,” but will defer adoption of the additional disclosures until the effective date of January 1, 2020 as permitted in the transition guidance in ASU 2018-13. Effective January 1, 2019, the Company early-adopted 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. The Company opted to apply ASU 2018-15 prospectively. The primary effect of the provisions is to capitalize eligible implementation costs during the application development phase and to amortize those costs over the life of the agreement. There was no significant impact to our condensed consolidated financial statements from the adoption of this new standard. 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. Reclassifications None.

Restricted Cash Balances

Restricted Cash Balances	3 Months Ended
	Mar. 31, 2019
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 three months ended March 31, 2019 and year ended December 31, 2018 were $92.2 million and $77.0 million . As of March 31, 2019 and December 31, 2018 , we pledged cash collateral for our derivative contracts of $2.3 million and $2.6 million .

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2019
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: March 31, 2019 December 31, 2018 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 $ 340,184 $ 3,990 $ (998 ) $ 343,176 $ 281,486 $ 1,902 $ (2,300 ) $ 281,088 Agency CMOs 712,090 8,625 (2,939 ) 717,776 634,774 3,448 (5,372 ) 632,850 Private label CMOs 121,981 2,205 (939 ) 123,247 101,313 1,985 (2,093 ) 101,205 Municipal securities 1,145,963 40,748 (1,710 ) 1,185,001 1,298,514 21,000 (7,320 ) 1,312,194 Agency commercial MBS 1,079,816 4,460 (5,365 ) 1,078,911 1,133,846 383 (21,525 ) 1,112,704 U.S. Treasury securities 287,721 2,996 — 290,717 401,056 2,437 (88 ) 403,405 Asset-backed securities 185,592 80 (516 ) 185,156 81,762 104 (481 ) 81,385 SBA securities 52,361 2 (339 ) 52,024 68,158 — (1,111 ) 67,047 Corporate debt securities 17,000 1,700 — 18,700 17,000 553 — 17,553 Total $ 3,942,708 $ 64,806 $ (12,806 ) $ 3,994,708 $ 4,017,909 $ 31,812 $ (40,290 ) $ 4,009,431 See Note 11. Fair Value Measurements for information on fair value measurements and methodology. As of March 31, 2019 , securities available-for-sale with a fair value of $495.4 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 March 31, 2019 , we sold $405.8 million of securities available-for-sale for a gross realized gain of $4.1 million and a gross realized loss of $1.9 million . During the three months ended March 31, 2018 , we sold $299.9 million of securities available-for-sale for a gross realized gain of $6.8 million and a gross realized loss of $515,000 . 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: March 31, 2019 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 $ — $ — $ 80,472 $ (998 ) $ 80,472 $ (998 ) Agency CMOs — — 148,729 (2,939 ) 148,729 (2,939 ) Private label CMOs 10,003 (6 ) 74,242 (933 ) 84,245 (939 ) Municipal securities — — 119,130 (1,710 ) 119,130 (1,710 ) Agency commercial MBS — — 611,315 (5,365 ) 611,315 (5,365 ) Asset-backed securities 80,287 (321 ) 19,136 (195 ) 99,423 (516 ) SBA securities — — 50,239 (339 ) 50,239 (339 ) Total $ 90,290 $ (327 ) $ 1,103,263 $ (12,479 ) $ 1,193,553 $ (12,806 ) December 31, 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 $ 60,164 $ (169 ) $ 85,245 $ (2,131 ) $ 145,409 $ (2,300 ) Agency CMOs 69,859 (326 ) 164,097 (5,046 ) 233,956 (5,372 ) Private label CMOs 32,170 (831 ) 49,237 (1,262 ) 81,407 (2,093 ) Municipal securities 52,386 (238 ) 284,915 (7,082 ) 337,301 (7,320 ) Agency commercial MBS 40,641 (341 ) 1,020,684 (21,184 ) 1,061,325 (21,525 ) U.S. Treasury securities 49,729 (88 ) — — 49,729 (88 ) Asset-backed securities 11,548 (38 ) 35,859 (443 ) 47,407 (481 ) SBA securities 249 (1 ) 66,798 (1,110 ) 67,047 (1,111 ) Total $ 316,746 $ (2,032 ) $ 1,706,835 $ (38,258 ) $ 2,023,581 $ (40,290 ) We reviewed the securities that were in an unrealized loss position at March 31, 2019 , 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: March 31, 2019 Amortized Fair Maturities Cost Value (In thousands) Due in one year or less $ 28,716 $ 28,703 Due after one year through five years 539,423 543,189 Due after five years through ten years 1,010,453 1,013,236 Due after ten years 2,364,116 2,409,580 Total securities available-for-sale $ 3,942,708 $ 3,994,708 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 March 31, December 31, March 31, 2019 2018 2018 (In thousands) Taxable interest $ 19,742 $ 19,181 $ 14,599 Non-taxable interest 9,593 9,866 11,107 Dividend income 345 643 432 Total interest income on investment securities $ 29,680 $ 29,690 $ 26,138

Loans and Leases

Loans and Leases	3 Months Ended
	Mar. 31, 2019
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. 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: March 31, December 31, 2019 2018 (In thousands) Real estate mortgage $ 8,172,992 $ 7,933,859 Real estate construction and land 2,379,560 2,262,710 Commercial 7,446,612 7,428,500 Consumer 372,131 401,296 Total gross loans and leases held for investment 18,371,295 18,026,365 Deferred fees, net (63,598 ) (68,652 ) Total loans and leases held for investment, net of deferred fees 18,307,697 17,957,713 Allowance for loan and lease losses (136,281 ) (132,472 ) Total loans and leases held for investment, net $ 18,171,416 $ 17,825,241 The following tables present an aging analysis of our loans and leases held for investment, net of deferred fees, by loan portfolio segment and class as of the dates indicated: March 31, 2019 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 7,266 $ 6,464 $ 13,730 $ 4,626,780 $ 4,640,510 Income producing and other residential 1,853 309 2,162 3,516,786 3,518,948 Total real estate mortgage 9,119 6,773 15,892 8,143,566 8,159,458 Real estate construction and land: Commercial — 430 430 943,166 943,596 Residential 8,949 — 8,949 1,399,179 1,408,128 Total real estate construction and land 8,949 430 9,379 2,342,345 2,351,724 Commercial: Asset-based 3,750 — 3,750 3,418,452 3,422,202 Venture capital 4,500 1,194 5,694 2,021,756 2,027,450 Other commercial 3,655 3,339 6,994 1,967,708 1,974,702 Total commercial 11,905 4,533 16,438 7,407,916 7,424,354 Consumer 614 208 822 371,339 372,161 Total $ 30,587 $ 11,944 $ 42,531 $ 18,265,166 $ 18,307,697 December 31, 2018 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 3,487 $ 7,541 $ 11,028 $ 4,813,270 $ 4,824,298 Income producing and other residential 1,557 476 2,033 3,091,810 3,093,843 Total real estate mortgage 5,044 8,017 13,061 7,905,080 7,918,141 Real estate construction and land: Commercial — 442 442 912,141 912,583 Residential 1,527 — 1,527 1,319,546 1,321,073 Total real estate construction and land 1,527 442 1,969 2,231,687 2,233,656 Commercial: Asset-based 47 646 693 3,304,728 3,305,421 Venture capital 4,705 — 4,705 2,034,043 2,038,748 Other commercial 5,181 1,285 6,466 2,053,960 2,060,426 Total commercial 9,933 1,931 11,864 7,392,731 7,404,595 Consumer 581 333 914 400,407 401,321 Total $ 17,085 $ 10,723 $ 27,808 $ 17,929,905 $ 17,957,713 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 loan portfolio segment and class as of the dates indicated: March 31, 2019 December 31, 2018 Nonaccrual Performing Total Nonaccrual Performing Total (In thousands) Real estate mortgage: Commercial $ 12,750 $ 4,627,760 $ 4,640,510 $ 15,321 $ 4,808,977 $ 4,824,298 Income producing and other residential 2,444 3,516,504 3,518,948 2,524 3,091,319 3,093,843 Total real estate mortgage 15,194 8,144,264 8,159,458 17,845 7,900,296 7,918,141 Real estate construction and land: Commercial 430 943,166 943,596 442 912,141 912,583 Residential — 1,408,128 1,408,128 — 1,321,073 1,321,073 Total real estate construction and land 430 2,351,294 2,351,724 442 2,233,214 2,233,656 Commercial: Asset-based 43,406 3,378,796 3,422,202 32,324 3,273,097 3,305,421 Venture capital 20,437 2,007,013 2,027,450 20,299 2,018,449 2,038,748 Other commercial 8,633 1,966,069 1,974,702 7,380 2,053,046 2,060,426 Total commercial 72,476 7,351,878 7,424,354 60,003 7,344,592 7,404,595 Consumer 427 371,734 372,161 1,043 400,278 401,321 Total $ 88,527 $ 18,219,170 $ 18,307,697 $ 79,333 $ 17,878,380 $ 17,957,713 At March 31, 2019 , nonaccrual loans and leases totaled $88.5 million and included $11.9 million of loans and leases 90 or more days past due, $2.4 million of loans and leases 30 to 89 days past due, and $74.2 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 $79.3 million at December 31, 2018 , including $10.7 million of loans and leases 90 or more days past due, $6.6 million of loans and leases 30 to 89 days past due, and $62.0 million of current loans and leases that were placed on nonaccrual status based on management’s judgment regarding their collectability. As of March 31, 2019 , our three largest loan relationships on nonaccrual status had an aggregate carrying value of $52.4 million and represented 59% of total nonaccrual loans and leases. The following tables present the credit risk rating categories for loans and leases held for investment, net of deferred fees, by loan 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. March 31, 2019 Classified Special Mention Pass Total (In thousands) Real estate mortgage: Commercial $ 24,542 $ 67,115 $ 4,548,853 $ 4,640,510 Income producing and other residential 9,131 452 3,509,365 3,518,948 Total real estate mortgage 33,673 67,567 8,058,218 8,159,458 Real estate construction and land: Commercial 430 — 943,166 943,596 Residential — 2,485 1,405,643 1,408,128 Total real estate construction and land 430 2,485 2,348,809 2,351,724 Commercial: Asset-based 52,586 85,060 3,284,556 3,422,202 Venture capital 43,128 62,514 1,921,808 2,027,450 Other commercial 59,690 74,517 1,840,495 1,974,702 Total commercial 155,404 222,091 7,046,859 7,424,354 Consumer 798 637 370,726 372,161 Total $ 190,305 $ 292,780 $ 17,824,612 $ 18,307,697 December 31, 2018 Classified Special Mention Pass Total (In thousands) Real estate mortgage: Commercial $ 57,734 $ 74,785 $ 4,691,779 $ 4,824,298 Income producing and other residential 10,521 968 3,082,354 3,093,843 Total real estate mortgage 68,255 75,753 7,774,133 7,918,141 Real estate construction and land: Commercial 442 7,041 905,100 912,583 Residential — 1,527 1,319,546 1,321,073 Total real estate construction and land 442 8,568 2,224,646 2,233,656 Commercial: Asset-based 45,957 48,338 3,211,126 3,305,421 Venture capital 28,731 77,588 1,932,429 2,038,748 Other commercial 92,526 50,136 1,917,764 2,060,426 Total commercial 167,214 176,062 7,061,319 7,404,595 Consumer 1,199 1,015 399,107 401,321 Total $ 237,110 $ 261,398 $ 17,459,205 $ 17,957,713 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 loan portfolio segment as of the dates indicated: March 31, 2019 December 31, 2018 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 $ 15,194 $ 11,355 $ 26,549 $ 17,845 $ 11,484 $ 29,329 Real estate construction and land 430 5,002 5,432 442 5,420 5,862 Commercial 72,476 573 73,049 60,003 692 60,695 Consumer 427 97 524 1,043 105 1,148 Total $ 88,527 $ 17,027 $ 105,554 $ 79,333 $ 17,701 $ 97,034 The following tables present information regarding our impaired loans and leases held for investment, net of deferred fees, by loan portfolio segment and class as of and for the dates indicated: March 31, 2019 December 31, 2018 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 $ 1,139 $ 1,139 $ 68 $ 1,736 $ 1,648 $ 170 Income producing and other residential 2,090 2,084 202 2,569 2,563 247 Commercial: Asset based 10,335 10,335 2,735 — — — Venture capital 19,243 21,029 3,196 11,621 13,255 3,141 Other commercial — — — 473 482 473 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 15,727 $ 29,962 $ 17,783 $ 32,035 Income producing and other residential 7,593 9,775 7,241 9,425 Real estate construction and land: Commercial 5,432 5,449 5,862 5,870 Commercial: Asset-based 33,071 38,401 32,324 38,100 Venture capital 1,194 31,632 8,678 41,335 Other commercial 9,206 27,642 7,599 25,740 Consumer 524 693 1,148 1,470 Total Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 26,549 $ 42,960 $ 270 $ 29,329 $ 45,671 $ 417 Real estate construction and land 5,432 5,449 — 5,862 5,870 — Commercial 73,049 129,039 5,931 60,695 118,912 3,614 Consumer 524 693 — 1,148 1,470 — Total $ 105,554 $ 178,141 $ 6,201 $ 97,034 $ 171,923 $ 4,031 Three Months Ended March 31, 2019 2018 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 $ 1,139 $ 17 $ 13,884 $ 201 Income producing and other residential 2,090 16 4,295 23 Commercial: Asset-based 3,560 — — — Venture capital 12,906 — 14,598 — Other commercial — — 16,851 15 Consumer — — 295 2 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 15,538 $ 53 $ 46,782 $ 765 Income producing and other residential 7,516 53 8,464 45 Real estate construction and land: Commercial 5,432 101 5,670 89 Commercial: Asset-based 31,979 — 32,838 — Venture capital 1,194 — 4,474 — Other commercial 7,767 17 7,859 1,147 Consumer 524 2 79 — Total Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 26,283 $ 139 $ 73,425 $ 1,034 Real estate construction and land 5,432 101 5,670 89 Commercial 57,406 17 76,620 1,162 Consumer 524 2 374 2 Total $ 89,645 $ 259 $ 156,089 $ 2,287 _________________________ (1) For loans and leases reported as impaired at March 31, 2019 and 2018 , 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 loan portfolio segment and class for the periods indicated: Three Months Ended March 31, 2019 2018 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 1 $ 37 $ — — $ — $ — Income producing and other residential 3 789 789 — — — Commercial: Venture capital 6 2,105 1,242 — — — Other commercial 8 585 585 2 11,783 11,783 Total 18 $ 3,516 $ 2,616 2 $ 11,783 $ 11,783 During the three months ended March 31, 2019 , two other commercial loans totaling $64,000 were restructured in the preceding 12-month period and subsequently defaulted after being restructured. During the three months ended March 31, 2018 , one other commercial loan of $2.3 million was restructured in the preceding 12-month period and subsequently defaulted after being restructured. Leases Receivable We provide equipment financing to our customers primarily with direct financing leases. Lease receivables are recorded on the balance sheet but the leased equipment is not, although we generally retain legal title to the leased equipment until the end of each lease. Direct financing leases are stated at the net amount of minimum lease payments receivable, plus any unguaranteed residual value, less the amount of unearned income and net acquisition discount at the reporting date. Direct lease origination costs are amortized using the effective interest method over the life of the leases. Direct financing leases are subject to our allowance for loans and leases. The following table provides the components of leases receivable income for the period indicated: Three Months Ended March 31, 2019 (In thousands) Component of leases receivable income: Interest income on net investments in leases $ 3,140 The following table presents the components of leases receivable as of the date indicated: March 31, 2019 (Dollars in thousands) Net investment in sales type and direct financing leases: Lease payments receivable $ 195,018 Unguaranteed residual assets 25,895 Deferred fees and other 962 Aggregate net investment in leases $ 221,875 The following table presents maturities of leases receivable as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 77,413 2021 63,321 2022 42,112 2023 15,386 2024 8,998 Thereafter 7,348 Total undiscounted cash flows 214,578 Less: Unearned income (19,560 ) Present value of lease payments $ 195,018 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 loan portfolio segment for the periods indicated: Three Months Ended March 31, 2019 Real Estate Real Estate Construction Mortgage and Land Commercial Consumer Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period $ 46,021 $ 28,209 $ 56,360 $ 1,882 $ 132,472 Charge-offs (196 ) — (3,003 ) (266 ) (3,465 ) Recoveries 143 — 3,106 25 3,274 Net (charge-offs) recoveries (53 ) — 103 (241 ) (191 ) Provision (negative provision) (214 ) (1,001 ) 5,033 182 4,000 Balance, end of period $ 45,754 $ 27,208 $ 61,496 $ 1,823 $ 136,281 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 270 $ — $ 5,931 $ — $ 6,201 Collectively evaluated for impairment $ 45,484 $ 27,208 $ 55,565 $ 1,823 $ 130,080 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 23,908 $ 5,432 $ 71,660 $ — $ 101,000 Collectively evaluated for impairment 8,135,550 2,346,292 7,352,694 372,161 18,206,697 Ending balance $ 8,159,458 $ 2,351,724 $ 7,424,354 $ 372,161 $ 18,307,697 Three Months Ended March 31, 2018 Real Estate Real Estate Construction Mortgage and Land Commercial Consumer Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period (1) $ 40,051 $ 13,055 $ 84,022 $ 2,328 $ 139,456 Charge-offs (2,598 ) — (9,524 ) (31 ) (12,153 ) Recoveries 1,657 9 5,487 45 7,198 Net (charge-offs) recoveries (941 ) 9 (4,037 ) 14 (4,955 ) Provision (negative provision) 1,048 5,126 (6,205 ) (195 ) (226 ) Balance, end of period $ 40,158 $ 18,190 $ 73,780 $ 2,147 $ 134,275 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 1,088 $ — $ 13,141 $ 16 $ 14,245 Collectively evaluated for impairment $ 39,070 $ 18,190 $ 60,639 $ 2,131 $ 120,030 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 74,390 $ 5,670 $ 82,434 $ 324 $ 162,818 Collectively evaluated for impairment 7,479,853 1,671,332 6,743,689 397,593 16,292,467 Ending balance $ 7,554,243 $ 1,677,002 $ 6,826,123 $ 397,917 $ 16,455,285 _______________________________________ (1) The allowance for loan losses related to PCI loans of $6.4 million as of December 31, 2017 is reflected in the beginning balance of the allowance for loan and lease losses for the three months ended March 31, 2018 . 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 March 31, 2019 Allowance for Reserve for Total Loan and Unfunded Loan Allowance for Lease Losses Commitments Credit Losses (In thousands) Balance, beginning of period $ 132,472 $ 36,861 $ 169,333 Charge-offs (3,465 ) — (3,465 ) Recoveries 3,274 — 3,274 Net charge-offs (191 ) — (191 ) Provision 4,000 — 4,000 Balance, end of period $ 136,281 $ 36,861 $ 173,142 Three Months Ended March 31, 2018 Allowance for Reserve for Total Loan and Unfunded Loan Allowance for Lease Losses Commitments Credit Losses (In thousands) Balance, beginning of period (1) $ 139,456 $ 28,635 $ 168,091 Charge-offs (12,153 ) — (12,153 ) Recoveries 7,198 — 7,198 Net charge-offs (4,955 ) — (4,955 ) Provision (negative provision) (226 ) 4,226 4,000 Balance, end of period $ 134,275 $ 32,861 $ 167,136 _______________________________________ (1) The allowance for loan losses related to PCI loans of $6.4 million as of December 31, 2017 is reflected in the beginning balance of the allowance for loan and lease losses for the three months ended March 31, 2018 .

Foreclosed Assets

Foreclosed Assets	3 Months Ended
	Mar. 31, 2019
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: March 31, December 31, Property Type 2019 2018 (In thousands) Commercial real estate $ 2,041 $ 2,004 Single-family residence 953 953 Construction and land development 219 219 Multi‑family — 1,059 Total other real estate owned, net 3,213 4,235 Other foreclosed assets 78 1,064 Total foreclosed assets, net $ 3,291 $ 5,299 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, 2018 $ 5,299 Transfers to foreclosed assets from loans 37 Provision for losses — Reductions related to sales (2,045 ) Balance, March 31, 2019 $ 3,291

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2019
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 $18.7 million for 2019 . The estimated aggregate amortization expense related to our current intangible assets for each of the next five years is $14.6 million for 2020 , $10.8 million for 2021 , $7.5 million for 2022 , $3.8 million for 2023 , and $1.7 million for 2024 . The following table presents the changes in CDI and CRI and the related accumulated amortization for the periods indicated: Three Months Ended March 31, December 31, March 31, 2019 2018 2018 (In thousands) Gross Amount of CDI and CRI: Balance, beginning of period $ 119,497 $ 119,497 $ 119,497 Balance, end of period 119,497 119,497 119,497 Accumulated Amortization: Balance, beginning of period (62,377 ) (57,391 ) (39,871 ) Amortization (4,870 ) (4,986 ) (6,346 ) Balance, end of period (67,247 ) (62,377 ) (46,217 ) Net CDI and CRI, end of period $ 52,250 $ 57,120 $ 73,280

Other Assets

Other Assets	3 Months Ended
	Mar. 31, 2019
Other Assets [Abstract]
Other Assets	OTHER ASSETS The following table presents the detail of our other assets as of the dates indicated: March 31, December 31, Other Assets 2019 2018 (In thousands) Cash surrender value of BOLI $ 196,161 $ 194,897 Operating lease ROU assets, net 125,402 — Interest receivable 89,727 88,754 LIHTC investments 59,948 59,507 CRA investments (1) 59,824 59,062 Taxes receivable 17,289 39,096 Prepaid expenses 16,319 18,006 Equity investments without readily determinable fair values 14,777 14,758 Equity warrants 4,438 4,793 Equity investments with readily determinable fair values 3,848 4,891 Other receivables/assets 22,998 39,132 Total other assets $ 610,731 $ 522,896 ________________________ (1) Includes equity investments without readily determinable fair values of $13.1 million and $12.5 million at March 31, 2019 and December 31, 2018 . The increase in the operating lease ROU assets in the first quarter of 2019 was due to the adoption of ASU 2016-02 effective January 1, 2019. See Note 8. Leases for further details. Regarding our equity investments without readily determinable fair values, there were no impairments and no upward adjustments during the three months ended March 31, 2019 . On a cumulative basis since January 1, 2018 and through March 31, 2019 , we recorded impairments of $278,000 and upward adjustments of $286,000 to our equity investments without readily determinable fair values.

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	LEASES The Company adopted ASU 2016-02, " Leases (Topic 842), " effective January 1, 2019 and applied the guidance to all leases within the scope of Topic 842 as of that date. We have adopted the guidance using the optional transition method under ASU 2018-11, “ Leases (Topic 842): Targeted Improvements, ” and recognized a cumulative effect adjustment to retained earnings without prior periods restated, effectively applying the requirements of the new standard prospectively. We determine if an arrangement is a lease at inception by assessing whether there is an identified asset, and whether the contract conveys the right to control the use of the identified asset for a period of time in exchange for consideration. Topic 842 also requires a lessee to classify a lease as either finance or operating. The Company only has operating leases related to our facilities as of March 31, 2019 , which consists of 75 full-service branch offices and 76 other offices. ROU assets represent a lessee's right to use an underlying asset for the lease term and lease liabilities represent a lessee's obligation to make lease payments arising from the lease. On January 1, 2019, ROU assets and operating lease liabilities were initially recognized based on the present value of future minimum lease payments over the remaining lease terms. We used our incremental borrowing rates on January 1, 2019 to determine the present value of future payments. The ROU assets also include any prepaid lease payments and initial direct costs incurred less any lease incentives received. We amortize the operating lease ROU assets and record interest expense on the operating lease liabilities over the lease terms. Our leases have remaining terms ranging from 1 to 28 years . Short-term leases (initial term of less than 12 months) are not recorded on the balance sheet and lease expense is recognized on a straight-line basis over the lease term. We have lease agreements with lease and non-lease components, which are accounted for as a single lease component. Most leases include one or more options to renew, with renewal terms that can extend the lease from one to ten years . The exercise of lease renewal options is at our sole discretion. Some of our leases also include termination options. We have determined that we do not meet the reasonably certain threshold to exercise any renewal or termination options, therefore our lease terms do not reflect any optional periods. We rent or sublease certain office space to third parties. Our subleases consist of operating leases for offices that we have fully or partially vacated. Certain of our lease agreements also include rental payments that adjust periodically based on changes in the CPI. We initially measured our lease payments using the index at the lease commencement date. Subsequent increases in the CPI are treated as variable lease payments and recognized in the period in which the obligation for those payments is incurred. The ROU assets and lease liabilities are not re-measured as a result of changes in the CPI. Our lease agreements do not contain any purchase options, residual value guarantees, or restrictive covenants. Operating Leases as a Lessee Our lease expense is a component of "Occupancy expense" on our condensed consolidated statements of earnings. The following table presents the components of lease expense for the period indicated: Three Months Ended March 31, 2019 (In thousands) Operating lease expense: Fixed costs $ 8,302 Variable costs 24 Short-term lease costs 520 Sublease income (1,126 ) Net lease expense $ 7,720 The following table presents supplemental cash flow information related to leases for the period indicated: Three Months Ended March 31, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,242 ROU assets obtained in exchange for lease obligations: Operating leases $ 147,972 The following table presents supplemental balance sheet and other information related to operating leases as of the date indicated: March 31, 2019 (Dollars in thousands) Operating leases: Operating lease right-of-use assets, net $ 125,402 Operating lease liabilities $ 140,392 Weighted average remaining lease term (in years) 6 Weighted average discount rate 2.92 % The following table presents maturities of operating lease liabilities as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 32,749 2021 30,238 2022 25,928 2023 20,533 2024 17,600 Thereafter 26,875 Total operating lease liabilities 153,923 Less: Imputed interest (13,531 ) Present value of operating lease liabilities $ 140,392 Operating Leases as a Lessor We provide equipment financing through operating leases where we facilitate the purchase of equipment leased to our customers. The equipment is on our balance sheet as "Equipment leased to others under operating leases" and is depreciated to its estimated residual value at the end of the lease term, shown as "Leased equipment depreciation" in the condensed consolidated statements of earnings, according to our fixed asset accounting policy. We receive periodic rental income payments under the leases, which are recorded as "Noninterest Income" in the condensed consolidated statements of earnings. The following table presents the rental payments to be received on operating leases as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 34,368 2021 31,432 2022 23,162 2023 17,838 2024 16,104 Thereafter 41,444 Total undiscounted cash flows $ 164,348
Leases	LEASES The Company adopted ASU 2016-02, " Leases (Topic 842), " effective January 1, 2019 and applied the guidance to all leases within the scope of Topic 842 as of that date. We have adopted the guidance using the optional transition method under ASU 2018-11, “ Leases (Topic 842): Targeted Improvements, ” and recognized a cumulative effect adjustment to retained earnings without prior periods restated, effectively applying the requirements of the new standard prospectively. We determine if an arrangement is a lease at inception by assessing whether there is an identified asset, and whether the contract conveys the right to control the use of the identified asset for a period of time in exchange for consideration. Topic 842 also requires a lessee to classify a lease as either finance or operating. The Company only has operating leases related to our facilities as of March 31, 2019 , which consists of 75 full-service branch offices and 76 other offices. ROU assets represent a lessee's right to use an underlying asset for the lease term and lease liabilities represent a lessee's obligation to make lease payments arising from the lease. On January 1, 2019, ROU assets and operating lease liabilities were initially recognized based on the present value of future minimum lease payments over the remaining lease terms. We used our incremental borrowing rates on January 1, 2019 to determine the present value of future payments. The ROU assets also include any prepaid lease payments and initial direct costs incurred less any lease incentives received. We amortize the operating lease ROU assets and record interest expense on the operating lease liabilities over the lease terms. Our leases have remaining terms ranging from 1 to 28 years . Short-term leases (initial term of less than 12 months) are not recorded on the balance sheet and lease expense is recognized on a straight-line basis over the lease term. We have lease agreements with lease and non-lease components, which are accounted for as a single lease component. Most leases include one or more options to renew, with renewal terms that can extend the lease from one to ten years . The exercise of lease renewal options is at our sole discretion. Some of our leases also include termination options. We have determined that we do not meet the reasonably certain threshold to exercise any renewal or termination options, therefore our lease terms do not reflect any optional periods. We rent or sublease certain office space to third parties. Our subleases consist of operating leases for offices that we have fully or partially vacated. Certain of our lease agreements also include rental payments that adjust periodically based on changes in the CPI. We initially measured our lease payments using the index at the lease commencement date. Subsequent increases in the CPI are treated as variable lease payments and recognized in the period in which the obligation for those payments is incurred. The ROU assets and lease liabilities are not re-measured as a result of changes in the CPI. Our lease agreements do not contain any purchase options, residual value guarantees, or restrictive covenants. Operating Leases as a Lessee Our lease expense is a component of "Occupancy expense" on our condensed consolidated statements of earnings. The following table presents the components of lease expense for the period indicated: Three Months Ended March 31, 2019 (In thousands) Operating lease expense: Fixed costs $ 8,302 Variable costs 24 Short-term lease costs 520 Sublease income (1,126 ) Net lease expense $ 7,720 The following table presents supplemental cash flow information related to leases for the period indicated: Three Months Ended March 31, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,242 ROU assets obtained in exchange for lease obligations: Operating leases $ 147,972 The following table presents supplemental balance sheet and other information related to operating leases as of the date indicated: March 31, 2019 (Dollars in thousands) Operating leases: Operating lease right-of-use assets, net $ 125,402 Operating lease liabilities $ 140,392 Weighted average remaining lease term (in years) 6 Weighted average discount rate 2.92 % The following table presents maturities of operating lease liabilities as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 32,749 2021 30,238 2022 25,928 2023 20,533 2024 17,600 Thereafter 26,875 Total operating lease liabilities 153,923 Less: Imputed interest (13,531 ) Present value of operating lease liabilities $ 140,392 Operating Leases as a Lessor We provide equipment financing through operating leases where we facilitate the purchase of equipment leased to our customers. The equipment is on our balance sheet as "Equipment leased to others under operating leases" and is depreciated to its estimated residual value at the end of the lease term, shown as "Leased equipment depreciation" in the condensed consolidated statements of earnings, according to our fixed asset accounting policy. We receive periodic rental income payments under the leases, which are recorded as "Noninterest Income" in the condensed consolidated statements of earnings. The following table presents the rental payments to be received on operating leases as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 34,368 2021 31,432 2022 23,162 2023 17,838 2024 16,104 Thereafter 41,444 Total undiscounted cash flows $ 164,348

Borrowings and Subordinated Deb

Borrowings and Subordinated Debentures	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Borrowings and Subordinated Debentures	BORROWINGS AND SUBORDINATED DEBENTURES Borrowings The following table summarizes our borrowings as of the dates indicated: March 31, 2019 December 31, 2018 Weighted Weighted Average Average Amount Rate Amount Rate (Dollars in thousands) Non‑recourse debt $ 87 7.50 % $ 114 7.50 % FHLB secured advances 1,090,000 2.60 % 1,040,000 2.56 % FHLB unsecured overnight advance 141,000 2.57 % 141,000 2.53 % AFX borrowings 250,000 2.52 % 190,000 2.56 % Total borrowings $ 1,481,087 2.58 % $ 1,371,114 2.56 % 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 March 31, 2019 , this debt had a weighted average remaining maturity of 0.8 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 March 31, 2019 of $4.0 billion , collateralized by a blanket lien on $5.7 billion of qualifying loans. As of March 31, 2019 , the balance outstanding was a $1.1 billion overnight advance. As of December 31, 2018 , the balance outstanding was a $1.0 billion overnight advance. FRBSF Secured Line of Credit. The Bank has a secured line of credit with the FRBSF. As of March 31, 2019 , the Bank had secured borrowing capacity of $2.2 billion collateralized by liens covering $3.0 billion of qualifying loans. As of March 31, 2019 and December 31, 2018 , there were no balances outstanding. FHLB Unsecured Line of Credit. The Bank has a $141.0 million unsecured line of credit with the FHLB for the purchase of overnight funds, of which $141.0 million was outstanding at March 31, 2019 . At December 31, 2018 , the balance outstanding was $141.0 million . Federal Funds Arrangements with Commercial Banks. As of March 31, 2019 , the Bank had unsecured lines of credit of $180.0 million in the aggregate with several 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 March 31, 2019 and December 31, 2018 , 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 March 31, 2019 , the balance outstanding was $250.0 million , which consisted of $240.0 million in overnight borrowings and a $10.0 million one-month borrowing with a maturity date of April 17, 2019 . As of December 31, 2018 , there was a $190.0 million overnight borrowing outstanding. Subordinated Debentures The following table summarizes the terms of each issuance of subordinated debentures outstanding as of the dates indicated: March 31, 2019 December 31, 2018 Date Maturity Rate Index Series Amount Rate Amount Rate Issued Date (Quarterly Reset) (Dollars in thousands) Trust V $ 10,310 5.71 % $ 10,310 5.89 % 8/15/2003 9/17/2033 3-month LIBOR + 3.10 Trust VI 10,310 5.66 % 10,310 5.84 % 9/3/2003 9/15/2033 3-month LIBOR + 3.05 Trust CII 5,155 5.56 % 5,155 5.74 % 9/17/2003 9/17/2033 3-month LIBOR + 2.95 Trust VII 61,856 5.50 % 61,856 5.27 % 2/5/2004 4/23/2034 3-month LIBOR + 2.75 Trust CIII 20,619 4.30 % 20,619 4.48 % 8/15/2005 9/15/2035 3-month LIBOR + 1.69 Trust FCCI 16,495 4.21 % 16,495 4.39 % 1/25/2007 3/15/2037 3-month LIBOR + 1.60 Trust FCBI 10,310 4.16 % 10,310 4.34 % 9/30/2005 12/15/2035 3-month LIBOR + 1.55 Trust CS 2005-1 82,475 4.56 % 82,475 4.74 % 11/21/2005 12/15/2035 3-month LIBOR + 1.95 Trust CS 2005-2 128,866 4.70 % 128,866 4.47 % 12/14/2005 1/30/2036 3-month LIBOR + 1.95 Trust CS 2006-1 51,545 4.70 % 51,545 4.47 % 2/22/2006 4/30/2036 3-month LIBOR + 1.95 Trust CS 2006-2 51,550 4.70 % 51,550 4.47 % 9/27/2006 10/30/2036 3-month LIBOR + 1.95 Trust CS 2006-3 (1) 28,914 1.74 % 29,556 1.73 % 9/29/2006 10/30/2036 3-month EURIBOR + 2.05 Trust CS 2006-4 16,470 4.70 % 16,470 4.47 % 12/5/2006 1/30/2037 3-month LIBOR + 1.95 Trust CS 2006-5 6,650 4.70 % 6,650 4.47 % 12/19/2006 1/30/2037 3-month LIBOR + 1.95 Trust CS 2007-2 39,177 4.70 % 39,177 4.47 % 6/13/2007 7/30/2037 3-month LIBOR + 1.95 Gross subordinated debentures 540,702 4.62 % 541,344 4.51 % Unamortized discount (2) (86,244 ) (87,498 ) Net subordinated debentures $ 454,458 $ 453,846 ___________________ (1) Denomination is in Euros with a value of €25.8 million . (2) Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES The following table presents a summary of commitments described below as of the dates indicated: March 31, December 31, 2019 2018 (In thousands) Loan commitments to extend credit $ 7,465,392 $ 7,528,248 Standby letters of credit 335,534 364,210 Commitments to contribute capital to low income housing project partnerships and small business investment companies 101,280 101,991 Commitments to contribute capital to private equity funds 50 50 Total $ 7,902,256 $ 7,994,499 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. 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. 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 March 31, 2019 and December 31, 2018 , we had commitments to contribute capital to these entities totaling $101.3 million and $102.0 million . We also had commitments to contribute up to an additional $50,000 to private equity funds at March 31, 2019 and December 31, 2018 . 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.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 Measured on a Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Residential MBS and CMOs: Agency MBS $ 343,176 $ — $ 343,176 $ — Agency CMOs 717,776 — 717,776 — Private label CMOs 123,247 — 116,211 7,036 Municipal securities 1,185,001 — 1,185,001 — Agency commercial MBS 1,078,911 — 1,078,911 — U.S. Treasury securities 290,717 290,717 — — Asset-backed securities 185,156 — 149,703 35,453 SBA securities 52,024 — 52,024 — Corporate debt securities 18,700 — 18,700 — Total securities available-for-sale 3,994,708 290,717 3,661,502 42,489 Equity warrants 4,438 — — 4,438 Other derivative assets 2,493 — 2,493 — Equity investments with readily determinable fair values 3,848 3,848 — — Total recurring assets $ 4,005,487 $ 294,565 $ 3,663,995 $ 46,927 Derivative liabilities $ 633 $ — $ 633 $ — Fair Value Measurements as of December 31, 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 $ 281,088 $ — $ 281,088 $ — Agency CMOs 632,850 — 632,850 — Private label CMOs 101,205 — 93,917 7,288 Municipal securities 1,312,194 — 1,312,194 — Agency commercial MBS 1,112,704 — 1,112,704 — U.S. Treasury securities 403,405 403,405 — — Asset-backed securities 81,385 — 41,440 39,945 SBA securities 67,047 — 67,047 — Corporate debt securities 17,553 — 17,553 — Total securities available-for-sale 4,009,431 403,405 3,558,793 47,233 Equity warrants 4,793 — — 4,793 Other derivative assets 3,292 — 3,292 — Equity investments with readily determinable fair values 4,891 4,891 — — Total recurring assets $ 4,022,407 $ 408,296 $ 3,562,085 $ 52,026 Derivative liabilities $ 142 $ — $ 142 $ — During the three months ended March 31, 2019 , there was a $63,000 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: March 31, 2019 Private Label CMOs Asset-Backed Securities Weighted Input or Weighted Range Average Range Average Unobservable Inputs of Inputs Input of Inputs Input Voluntary annual prepayment speeds 3.9% - 22.4% 10.8% 12.0% - 15.0% 13.8% Annual default rates (1) 0.3% - 82.0% 1.8% 2.0% 2.0% Loss severity rates (1) 5.6% - 159.5% 51.8% 60.0% 60.0% Discount rates 2.5% - 9.6% 6.4% 3.2% - 5.2% 4.2% ____________________ (1) The annual default rates and loss severity rates were the same for all of the asset-backed securities. 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: March 31, 2019 Equity Warrants Weighted Average Unobservable Inputs Input Volatility 17.0% Risk-free interest rate 2.2% Remaining life assumption (in years) 3.45 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, 2018 $ 7,288 $ 39,945 $ 4,793 Total included in earnings 137 (38 ) 2,279 Total included in other comprehensive income (84 ) 62 — Issuances — — 88 Sales and dispositions (1) — — (2,659 ) Net settlements (305 ) (4,516 ) — Transfers to Level 1 — — (63 ) Balance, March 31, 2019 $ 7,036 $ 35,453 $ 4,438 ______________________ (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 March 31, 2019 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired loans $ 27,901 $ — $ 7,886 $ 20,015 Loans held for sale 25,124 — 25,124 — Total non-recurring $ 53,025 $ — $ 33,010 $ 20,015 Fair Value Measurement as of December 31, 2018 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired loans $ 24,432 $ — $ 1,800 $ 22,632 OREO 1,136 — 1,136 — Total non-recurring $ 25,568 $ — $ 2,936 $ 22,632 The following table presents losses recognized on assets measured on a nonrecurring basis for the periods indicated: Three Months Ended Losses on Assets March 31, Measured on a Non‑Recurring Basis 2019 2018 (In thousands) Impaired loans $ 3,756 $ 7,816 Loans held for sale 1,707 — OREO — 65 Total losses $ 5,463 $ 7,881 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: March 31, 2019 Valuation Unobservable Weighted Asset Fair Value Technique Inputs Range Average (In thousands) Impaired loans $ 19,006 Discounted cash flows Discount rates 3.75% - 8.00% 6.43% Impaired loans 1,009 Third party appraisals No discounts Total non-recurring Level 3 $ 20,015 The following tables present carrying amounts and estimated fair values of certain financial instruments as of the dates indicated: March 31, 2019 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 224,758 $ 224,758 $ 224,758 $ — $ — Interest‑earning deposits in financial institutions 332,124 332,124 332,124 — — Securities available‑for‑sale 3,994,708 3,994,708 290,717 3,661,502 42,489 Investment in FHLB stock 29,430 29,430 — 29,430 — Loans held for sale 25,124 25,124 — 25,124 — Loans and leases held for investment, net 18,171,416 17,719,820 — 7,886 17,711,934 Equity warrants 4,438 4,438 — — 4,438 Other derivative assets 2,493 2,493 — 2,493 — Equity investments with readily determinable fair values 3,848 3,848 3,848 — — Financial Liabilities: Core deposits 16,127,638 16,127,638 — 16,127,638 — Non-core non-maturity deposits 454,277 454,277 — 454,277 — Time deposits 2,704,012 2,697,119 — 2,697,119 — Borrowings 1,481,087 1,481,085 1,471,000 10,085 — Subordinated debentures 454,458 438,207 — 438,207 — Derivative liabilities 633 633 — 633 — December 31, 2018 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 175,830 $ 175,830 $ 175,830 $ — $ — Interest‑earning deposits in financial institutions 209,937 209,937 209,937 — — Securities available‑for‑sale 4,009,431 4,009,431 403,405 3,558,793 47,233 Investment in FHLB stock 32,103 32,103 — 32,103 — Loans and leases held for investment, net 17,825,241 17,013,860 — 1,800 17,012,060 Equity warrants 4,793 4,793 — — 4,793 Other derivative assets 3,292 3,292 — 3,292 — Equity investments with readily determinable fair values 4,891 4,891 4,891 — — Financial Liabilities: Core deposits 16,346,671 16,346,671 — 16,346,671 — Non-core non-maturity deposits 518,192 518,192 — 518,192 — Time deposits 2,005,638 2,017,137 — 2,017,137 — Borrowings 1,371,114 1,371,114 1,371,000 114 — Subordinated debentures 453,846 435,251 — 435,251 — Derivative liabilities 142 142 — 142 — 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 13. Fair Value Measurements, to the Consolidated Financial Statements of the Company's 2018 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 March 31, 2019 , the amounts that will actually be realized or paid at settlement or maturity of the instruments could be significantly different.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
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 March 31, December 31, March 31, 2019 2018 2018 (Dollars in thousands, except per share data) Basic Earnings Per Share: Net earnings $ 112,604 $ 115,041 $ 118,276 Less: Earnings allocated to unvested restricted stock (1) (1,163 ) (1,219 ) (1,115 ) Net earnings allocated to common shares $ 111,441 $ 113,822 $ 117,161 Weighted-average basic shares and unvested restricted stock outstanding 122,227 123,238 127,487 Less: Weighted-average unvested restricted stock outstanding (1,352 ) (1,426 ) (1,413 ) Weighted-average basic shares outstanding 120,875 121,812 126,074 Basic earnings per share $ 0.92 $ 0.93 $ 0.93 Diluted Earnings Per Share: Net earnings allocated to common shares $ 111,441 $ 113,822 $ 117,161 Weighted-average basic shares outstanding 120,875 121,812 126,074 Diluted earnings per share $ 0.92 $ 0.93 $ 0.93 ________________________ (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.

Revenue From Contracts With Cus

Revenue From Contracts With Customers	3 Months Ended
	Mar. 31, 2019
Revenue From Contracts With Customers [Abstract]
Revenue from Contracts with Customers	REVENUE FROM CONTRACTS WITH CUSTOMERS 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 March 31, 2019 Three Months Ended March 31, 2018 Total Revenue from Total Revenue from Recorded Contracts with Recorded Contracts with Revenue Customers Revenue Customers (In thousands) Total interest income $ 304,559 $ — $ 277,775 $ — Noninterest income: Service charges on deposit accounts 3,730 3,730 4,174 4,174 Other commissions and fees 11,008 4,538 10,265 4,651 Leased equipment income 9,282 — 9,587 — Gain on sale of loans — — 4,569 — Gain on sale of securities 2,161 — 6,311 — Other income 4,883 371 3,653 461 Total noninterest income 31,064 8,639 38,559 9,286 Total revenue $ 335,623 $ 8,639 $ 316,334 $ 9,286 The following table presents revenue from contracts with customers based on the timing of revenue recognition for the period indicated: Three Months Ended March 31, 2019 2018 (In thousands) Products and services transferred at a point in time $ 4,546 $ 4,661 Products and services transferred over time 4,093 4,625 Total revenue from contracts with customers $ 8,639 $ 9,286 Contract Balances The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers: March 31, 2019 December 31, 2018 (In thousands) Receivables, which are included in "Other assets" $ 1,198 $ 1,334 Contract assets, which are included in "Other assets" $ — $ — Contract liabilities, which are included in "Accrued interest payable and other liabilities" $ 588 $ 621 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 three months ended March 31, 2019 due to revenue recognized that was included in the contract liability balance at the beginning of the period was $33,000 .

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2019
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. 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 March 31, 2019 , there were 3,069,009 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 $5.8 million , $6.9 million , and $7.2 million for the three months ended March 31, 2019 , December 31, 2018 , and March 31, 2018 . 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 March 31, 2019 totaled $49.7 million . Time-Based Restricted Stock Awards At March 31, 2019 , there were 1,241,543 shares of unvested TRSAs outstanding pursuant to the Company's 2003 and 2017 Stock Incentive 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 March 31, 2019 , there were 276,386 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 and the employee continues to meet the service requirement of the award.

Recently Issued Accounting Stan

Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2019
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	RECENTLY ISSUED ACCOUNTING STANDARDS Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2016-13, " Measurement of Credit Losses on Financial Instruments, " and ASU 2018-19, “ Codification Improvements to Topic 326, Financial Instruments - Credit Losses” 1. This Update changes the accounting and recognition of credit losses and impairment of financial assets recorded at amortized cost. Under the 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 requires loss estimates for the remaining estimated life of the financial assets using historical experience, current conditions and reasonable and supportable forecasts. 2. The Update amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. Receivables arising from operating leases are not within the scope of the new credit losses standard. 3. The Update must be applied using the modified retrospective method with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption. A prospective transition approach is required for available-for-sale debt securities for which an other-than-temporary impairment had been recognized before the adoption date. Early adoption is permitted. January 1, 2020 1. The Company has established a multidisciplinary project team and implementation plan, selected a software solution, reached preliminary accounting decisions on various matters, developed a conceptual framework, and developed regression models for the reasonable and supportable forecast period. 2. The Company continues to test and refine the CECL models and has begun parallel calculations, testing, and sensitivity analysis on its initial modeling assumptions and results. The ultimate impact is influenced by our portfolio characteristics, of which the vast majority is comprised of short-duration commercial loans; the macroeconomic conditions and forecasts at adoption; and other management judgments. 3. We plan to adopt this new standard on January 1, 2020. 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 on its consolidated financial position and results of operations. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2017-04, " Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" 1. This Update simplifies 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. 2. The goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount, and an impairment charge would be recognized 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. 3. The Update must be applied prospectively and early adoption is permitted. January 1, 2020 1. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations and we plan to adopt this standard on January 1, 2020. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2018-13, “ Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements” 1. This Update modified the disclosure requirements in Topic 820 to add disclosures regarding changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements and the narrative description of measurement uncertainty. 2. Certain disclosure requirements in Topic 820 are also removed or modified. Certain disclosures in ASU 2018-13 would need to be applied on a retrospective basis and others on a prospective basis and early adoption is permitted. January 1, 2020 1. The adoption of this guidance will modify disclosures but will not have an impact on the Company’s consolidated financial position or results of operations. The Company has early adopted any removed or modified disclosures effective January 1, 2019 but will defer adoption of the additional disclosures until January 1, 2020 as permitted in the transition guidance in ASU 2018-13. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2019-04, " Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments " 1. This Update made clarifications and amendments to five topics: (i) Topic A: Codification Improvements Resulting from the June and November 2018 Credit Losses Transition Resource Group ("TRG") Meetings, (ii) Topic B: Codification Improvements to ASU 2016-13, (iii) Topic C: Codification Improvements to ASU 2017-12, " Derivatives and Hedging (Topic 815) " and Other Hedging Items, (iv) Topic D: Codification Improvements to ASU 2016-01, " Financial Instruments - Overall (Subtopic 825-10) ," and (v) Topic E: Codification Improvements Resulting from the November 2018 Credit Losses TRG Meeting. 2. In addition to conforming amendments that correct for errors and oversights, the Update in Topics A, B, and E, which impacts CECL implementation, amends or clarifies guidance for accrued interest; transfers between classifications or categories of loans and debt securities; recoveries; effect of prepayments in determining the effective interest rate; estimated costs to sell when foreclosure is probable; vintage disclosure presentation related to line-of-credit arrangements converted to term loans; contractual extensions or renewals; and others. 3. Transition requirements for the amendments are the same as ASU 2016-13 for the Update in Topics A, B, and E. The Update in Topic C may be applied retrospectively as of the date of initial adoption of ASU 2017-012 or prospectively. The Update in Topic D must be applied on a modified retrospective method with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption and early adoption is permitted. January 1, 2020; except for Topic C - January 1, 2019 1. Impacts from the adoption of Topics A, B, and E within this Update will be considered in the Company's overall CECL implementation and we plan to adopt this Update concurrent with the adoption of ASU 2016-13. 2. The adoption of Topic D within this Update is not expected to have a material impact on the Company's consolidated financial position or results of operations and we plan to adopt this standard on January 1, 2020. 3. Topic C within this Update is not applicable to us and therefore there is no impact on the Company's consolidated financial position or results of operations.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Common Stock Dividends On May 1, 2019 , 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 May 31, 2019 to stockholders of record at the close of business on May 20, 2019 . The Company has evaluated events that have occurred subsequent to March 31, 2019 and have concluded there are no other subsequent events that would require recognition in the accompanying consolidated financial statements.

Organization Organization (Poli

Organization Organization (Policies)	3 Months Ended
	Mar. 31, 2019
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, 2018 as filed with the Securities and Exchange Commission ("Form 10-K").
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. 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 across the country through its Community Banking, National Lending and Venture Banking groups. Community Banking provides real estate loans, commercial loans, and comprehensive deposit and treasury management services to small and medium-sized businesses conducted primarily through our California-based branch offices. 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 Pacific Western 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 interest paid by the Bank on deposits and borrowings, compensation, occupancy, and general operating expenses. We have completed 29 acquisitions from May 1, 2000 through March 31, 2019 . 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. 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, 2018 as filed with the Securities and Exchange Commission ("Form 10-K"). Accounting Standards Adopted in 2019 Effective January 1, 2019, the Company adopted ASU 2016-02, " Leases (Topic 842), " and the related amendments to this new standard issued in 2018. ASU 2016-02 supersedes Topic 840, “ Leases,” and is intended to increase transparency and comparability among organizations by requiring the recognition of right-of-use (“ROU”) assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of the financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted the new standard using the optional transition method under ASU 2018-11, “ Leases (Topic 842): Targeted Improvements, ” and recognized a cumulative effect adjustment to increase retained earnings by $938,000 , net of taxes, without restating prior periods and applying the requirements of the new standard prospectively. The Company has elected the following practical expedients: (1) to not separate lease and non-lease components for facilities leases; (2) to not reassess whether any expired or existing contracts are or contain leases and to maintain existing lease classifications; (3) to not record short-term leases (initial term less than 12 months) on the balance sheet; and (4) to elect to present sales tax on a net basis for those transactions in which the Company's the lessor. The standard had a significant impact on our condensed consolidated balance sheet, but did not have a significant impact on our condensed consolidated statement of earnings. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases, while the accounting for leases as a lessor remained substantially unchanged. The ROU asset is included within "Other assets," while the ROU liability is included within "Accrued interest payable and other liabilities". See Note 8. Leases and Note 7. Other Assets for further details. Effective January 1, 2019, the Company early-adopted any removed or modified disclosures as permitted by ASU 2018-13, “ Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements,” but will defer adoption of the additional disclosures until the effective date of January 1, 2020 as permitted in the transition guidance in ASU 2018-13. Effective January 1, 2019, the Company early-adopted 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. The Company opted to apply ASU 2018-15 prospectively. The primary effect of the provisions is to capitalize eligible implementation costs during the application development phase and to amortize those costs over the life of the agreement. There was no significant impact to our condensed consolidated financial statements from the adoption of this new standard. RECENTLY ISSUED ACCOUNTING STANDARDS Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2016-13, " Measurement of Credit Losses on Financial Instruments, " and ASU 2018-19, “ Codification Improvements to Topic 326, Financial Instruments - Credit Losses” 1. This Update changes the accounting and recognition of credit losses and impairment of financial assets recorded at amortized cost. Under the 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 requires loss estimates for the remaining estimated life of the financial assets using historical experience, current conditions and reasonable and supportable forecasts. 2. The Update amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. Receivables arising from operating leases are not within the scope of the new credit losses standard. 3. The Update must be applied using the modified retrospective method with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption. A prospective transition approach is required for available-for-sale debt securities for which an other-than-temporary impairment had been recognized before the adoption date. Early adoption is permitted. January 1, 2020 1. The Company has established a multidisciplinary project team and implementation plan, selected a software solution, reached preliminary accounting decisions on various matters, developed a conceptual framework, and developed regression models for the reasonable and supportable forecast period. 2. The Company continues to test and refine the CECL models and has begun parallel calculations, testing, and sensitivity analysis on its initial modeling assumptions and results. The ultimate impact is influenced by our portfolio characteristics, of which the vast majority is comprised of short-duration commercial loans; the macroeconomic conditions and forecasts at adoption; and other management judgments. 3. We plan to adopt this new standard on January 1, 2020. 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 on its consolidated financial position and results of operations. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2017-04, " Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" 1. This Update simplifies 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. 2. The goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount, and an impairment charge would be recognized 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. 3. The Update must be applied prospectively and early adoption is permitted. January 1, 2020 1. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations and we plan to adopt this standard on January 1, 2020. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2018-13, “ Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements” 1. This Update modified the disclosure requirements in Topic 820 to add disclosures regarding changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements and the narrative description of measurement uncertainty. 2. Certain disclosure requirements in Topic 820 are also removed or modified. Certain disclosures in ASU 2018-13 would need to be applied on a retrospective basis and others on a prospective basis and early adoption is permitted. January 1, 2020 1. The adoption of this guidance will modify disclosures but will not have an impact on the Company’s consolidated financial position or results of operations. The Company has early adopted any removed or modified disclosures effective January 1, 2019 but will defer adoption of the additional disclosures until January 1, 2020 as permitted in the transition guidance in ASU 2018-13. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2019-04, " Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments " 1. This Update made clarifications and amendments to five topics: (i) Topic A: Codification Improvements Resulting from the June and November 2018 Credit Losses Transition Resource Group ("TRG") Meetings, (ii) Topic B: Codification Improvements to ASU 2016-13, (iii) Topic C: Codification Improvements to ASU 2017-12, " Derivatives and Hedging (Topic 815) " and Other Hedging Items, (iv) Topic D: Codification Improvements to ASU 2016-01, " Financial Instruments - Overall (Subtopic 825-10) ," and (v) Topic E: Codification Improvements Resulting from the November 2018 Credit Losses TRG Meeting. 2. In addition to conforming amendments that correct for errors and oversights, the Update in Topics A, B, and E, which impacts CECL implementation, amends or clarifies guidance for accrued interest; transfers between classifications or categories of loans and debt securities; recoveries; effect of prepayments in determining the effective interest rate; estimated costs to sell when foreclosure is probable; vintage disclosure presentation related to line-of-credit arrangements converted to term loans; contractual extensions or renewals; and others. 3. Transition requirements for the amendments are the same as ASU 2016-13 for the Update in Topics A, B, and E. The Update in Topic C may be applied retrospectively as of the date of initial adoption of ASU 2017-012 or prospectively. The Update in Topic D must be applied on a modified retrospective method with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption and early adoption is permitted. January 1, 2020; except for Topic C - January 1, 2019 1. Impacts from the adoption of Topics A, B, and E within this Update will be considered in the Company's overall CECL implementation and we plan to adopt this Update concurrent with the adoption of ASU 2016-13. 2. The adoption of Topic D within this Update is not expected to have a material impact on the Company's consolidated financial position or results of operations and we plan to adopt this standard on January 1, 2020. 3. Topic C within this Update is not applicable to us and therefore there is no impact on the Company's 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.
Reclassifications	Reclassifications None.

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Disclosures (Policies)	3 Months Ended
	Mar. 31, 2019
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.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2019
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: March 31, 2019 December 31, 2018 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 $ 340,184 $ 3,990 $ (998 ) $ 343,176 $ 281,486 $ 1,902 $ (2,300 ) $ 281,088 Agency CMOs 712,090 8,625 (2,939 ) 717,776 634,774 3,448 (5,372 ) 632,850 Private label CMOs 121,981 2,205 (939 ) 123,247 101,313 1,985 (2,093 ) 101,205 Municipal securities 1,145,963 40,748 (1,710 ) 1,185,001 1,298,514 21,000 (7,320 ) 1,312,194 Agency commercial MBS 1,079,816 4,460 (5,365 ) 1,078,911 1,133,846 383 (21,525 ) 1,112,704 U.S. Treasury securities 287,721 2,996 — 290,717 401,056 2,437 (88 ) 403,405 Asset-backed securities 185,592 80 (516 ) 185,156 81,762 104 (481 ) 81,385 SBA securities 52,361 2 (339 ) 52,024 68,158 — (1,111 ) 67,047 Corporate debt securities 17,000 1,700 — 18,700 17,000 553 — 17,553 Total $ 3,942,708 $ 64,806 $ (12,806 ) $ 3,994,708 $ 4,017,909 $ 31,812 $ (40,290 ) $ 4,009,431 See Note 11. Fair Value Measurements for information on fair value measurements and methodology.
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: March 31, 2019 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 $ — $ — $ 80,472 $ (998 ) $ 80,472 $ (998 ) Agency CMOs — — 148,729 (2,939 ) 148,729 (2,939 ) Private label CMOs 10,003 (6 ) 74,242 (933 ) 84,245 (939 ) Municipal securities — — 119,130 (1,710 ) 119,130 (1,710 ) Agency commercial MBS — — 611,315 (5,365 ) 611,315 (5,365 ) Asset-backed securities 80,287 (321 ) 19,136 (195 ) 99,423 (516 ) SBA securities — — 50,239 (339 ) 50,239 (339 ) Total $ 90,290 $ (327 ) $ 1,103,263 $ (12,479 ) $ 1,193,553 $ (12,806 ) December 31, 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 $ 60,164 $ (169 ) $ 85,245 $ (2,131 ) $ 145,409 $ (2,300 ) Agency CMOs 69,859 (326 ) 164,097 (5,046 ) 233,956 (5,372 ) Private label CMOs 32,170 (831 ) 49,237 (1,262 ) 81,407 (2,093 ) Municipal securities 52,386 (238 ) 284,915 (7,082 ) 337,301 (7,320 ) Agency commercial MBS 40,641 (341 ) 1,020,684 (21,184 ) 1,061,325 (21,525 ) U.S. Treasury securities 49,729 (88 ) — — 49,729 (88 ) Asset-backed securities 11,548 (38 ) 35,859 (443 ) 47,407 (481 ) SBA securities 249 (1 ) 66,798 (1,110 ) 67,047 (1,111 ) Total $ 316,746 $ (2,032 ) $ 1,706,835 $ (38,258 ) $ 2,023,581 $ (40,290 )
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: March 31, 2019 Amortized Fair Maturities Cost Value (In thousands) Due in one year or less $ 28,716 $ 28,703 Due after one year through five years 539,423 543,189 Due after five years through ten years 1,010,453 1,013,236 Due after ten years 2,364,116 2,409,580 Total securities available-for-sale $ 3,942,708 $ 3,994,708
Investment income	The following table presents the composition of our interest income on investment securities for the periods indicated: Three Months Ended March 31, December 31, March 31, 2019 2018 2018 (In thousands) Taxable interest $ 19,742 $ 19,181 $ 14,599 Non-taxable interest 9,593 9,866 11,107 Dividend income 345 643 432 Total interest income on investment securities $ 29,680 $ 29,690 $ 26,138

Loans and Leases (Tables)

Loans and Leases (Tables)	3 Months Ended
	Mar. 31, 2019
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: March 31, December 31, 2019 2018 (In thousands) Real estate mortgage $ 8,172,992 $ 7,933,859 Real estate construction and land 2,379,560 2,262,710 Commercial 7,446,612 7,428,500 Consumer 372,131 401,296 Total gross loans and leases held for investment 18,371,295 18,026,365 Deferred fees, net (63,598 ) (68,652 ) Total loans and leases held for investment, net of deferred fees 18,307,697 17,957,713 Allowance for loan and lease losses (136,281 ) (132,472 ) Total loans and leases held for investment, net $ 18,171,416 $ 17,825,241
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 loan portfolio segment and class as of the dates indicated: March 31, 2019 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 7,266 $ 6,464 $ 13,730 $ 4,626,780 $ 4,640,510 Income producing and other residential 1,853 309 2,162 3,516,786 3,518,948 Total real estate mortgage 9,119 6,773 15,892 8,143,566 8,159,458 Real estate construction and land: Commercial — 430 430 943,166 943,596 Residential 8,949 — 8,949 1,399,179 1,408,128 Total real estate construction and land 8,949 430 9,379 2,342,345 2,351,724 Commercial: Asset-based 3,750 — 3,750 3,418,452 3,422,202 Venture capital 4,500 1,194 5,694 2,021,756 2,027,450 Other commercial 3,655 3,339 6,994 1,967,708 1,974,702 Total commercial 11,905 4,533 16,438 7,407,916 7,424,354 Consumer 614 208 822 371,339 372,161 Total $ 30,587 $ 11,944 $ 42,531 $ 18,265,166 $ 18,307,697 December 31, 2018 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 3,487 $ 7,541 $ 11,028 $ 4,813,270 $ 4,824,298 Income producing and other residential 1,557 476 2,033 3,091,810 3,093,843 Total real estate mortgage 5,044 8,017 13,061 7,905,080 7,918,141 Real estate construction and land: Commercial — 442 442 912,141 912,583 Residential 1,527 — 1,527 1,319,546 1,321,073 Total real estate construction and land 1,527 442 1,969 2,231,687 2,233,656 Commercial: Asset-based 47 646 693 3,304,728 3,305,421 Venture capital 4,705 — 4,705 2,034,043 2,038,748 Other commercial 5,181 1,285 6,466 2,053,960 2,060,426 Total commercial 9,933 1,931 11,864 7,392,731 7,404,595 Consumer 581 333 914 400,407 401,321 Total $ 17,085 $ 10,723 $ 27,808 $ 17,929,905 $ 17,957,713
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 loan portfolio segment and class as of the dates indicated: March 31, 2019 December 31, 2018 Nonaccrual Performing Total Nonaccrual Performing Total (In thousands) Real estate mortgage: Commercial $ 12,750 $ 4,627,760 $ 4,640,510 $ 15,321 $ 4,808,977 $ 4,824,298 Income producing and other residential 2,444 3,516,504 3,518,948 2,524 3,091,319 3,093,843 Total real estate mortgage 15,194 8,144,264 8,159,458 17,845 7,900,296 7,918,141 Real estate construction and land: Commercial 430 943,166 943,596 442 912,141 912,583 Residential — 1,408,128 1,408,128 — 1,321,073 1,321,073 Total real estate construction and land 430 2,351,294 2,351,724 442 2,233,214 2,233,656 Commercial: Asset-based 43,406 3,378,796 3,422,202 32,324 3,273,097 3,305,421 Venture capital 20,437 2,007,013 2,027,450 20,299 2,018,449 2,038,748 Other commercial 8,633 1,966,069 1,974,702 7,380 2,053,046 2,060,426 Total commercial 72,476 7,351,878 7,424,354 60,003 7,344,592 7,404,595 Consumer 427 371,734 372,161 1,043 400,278 401,321 Total $ 88,527 $ 18,219,170 $ 18,307,697 $ 79,333 $ 17,878,380 $ 17,957,713 The following table presents the composition of our impaired loans and leases held for investment, net of deferred fees, by loan portfolio segment as of the dates indicated: March 31, 2019 December 31, 2018 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 $ 15,194 $ 11,355 $ 26,549 $ 17,845 $ 11,484 $ 29,329 Real estate construction and land 430 5,002 5,432 442 5,420 5,862 Commercial 72,476 573 73,049 60,003 692 60,695 Consumer 427 97 524 1,043 105 1,148 Total $ 88,527 $ 17,027 $ 105,554 $ 79,333 $ 17,701 $ 97,034
CV of loans held for investment by class by performing and nonperforming	The following tables present the credit risk rating categories for loans and leases held for investment, net of deferred fees, by loan 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. March 31, 2019 Classified Special Mention Pass Total (In thousands) Real estate mortgage: Commercial $ 24,542 $ 67,115 $ 4,548,853 $ 4,640,510 Income producing and other residential 9,131 452 3,509,365 3,518,948 Total real estate mortgage 33,673 67,567 8,058,218 8,159,458 Real estate construction and land: Commercial 430 — 943,166 943,596 Residential — 2,485 1,405,643 1,408,128 Total real estate construction and land 430 2,485 2,348,809 2,351,724 Commercial: Asset-based 52,586 85,060 3,284,556 3,422,202 Venture capital 43,128 62,514 1,921,808 2,027,450 Other commercial 59,690 74,517 1,840,495 1,974,702 Total commercial 155,404 222,091 7,046,859 7,424,354 Consumer 798 637 370,726 372,161 Total $ 190,305 $ 292,780 $ 17,824,612 $ 18,307,697 December 31, 2018 Classified Special Mention Pass Total (In thousands) Real estate mortgage: Commercial $ 57,734 $ 74,785 $ 4,691,779 $ 4,824,298 Income producing and other residential 10,521 968 3,082,354 3,093,843 Total real estate mortgage 68,255 75,753 7,774,133 7,918,141 Real estate construction and land: Commercial 442 7,041 905,100 912,583 Residential — 1,527 1,319,546 1,321,073 Total real estate construction and land 442 8,568 2,224,646 2,233,656 Commercial: Asset-based 45,957 48,338 3,211,126 3,305,421 Venture capital 28,731 77,588 1,932,429 2,038,748 Other commercial 92,526 50,136 1,917,764 2,060,426 Total commercial 167,214 176,062 7,061,319 7,404,595 Consumer 1,199 1,015 399,107 401,321 Total $ 237,110 $ 261,398 $ 17,459,205 $ 17,957,713
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 loan portfolio segment and class as of and for the dates indicated: March 31, 2019 December 31, 2018 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 $ 1,139 $ 1,139 $ 68 $ 1,736 $ 1,648 $ 170 Income producing and other residential 2,090 2,084 202 2,569 2,563 247 Commercial: Asset based 10,335 10,335 2,735 — — — Venture capital 19,243 21,029 3,196 11,621 13,255 3,141 Other commercial — — — 473 482 473 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 15,727 $ 29,962 $ 17,783 $ 32,035 Income producing and other residential 7,593 9,775 7,241 9,425 Real estate construction and land: Commercial 5,432 5,449 5,862 5,870 Commercial: Asset-based 33,071 38,401 32,324 38,100 Venture capital 1,194 31,632 8,678 41,335 Other commercial 9,206 27,642 7,599 25,740 Consumer 524 693 1,148 1,470 Total Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 26,549 $ 42,960 $ 270 $ 29,329 $ 45,671 $ 417 Real estate construction and land 5,432 5,449 — 5,862 5,870 — Commercial 73,049 129,039 5,931 60,695 118,912 3,614 Consumer 524 693 — 1,148 1,470 — Total $ 105,554 $ 178,141 $ 6,201 $ 97,034 $ 171,923 $ 4,031 Three Months Ended March 31, 2019 2018 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 $ 1,139 $ 17 $ 13,884 $ 201 Income producing and other residential 2,090 16 4,295 23 Commercial: Asset-based 3,560 — — — Venture capital 12,906 — 14,598 — Other commercial — — 16,851 15 Consumer — — 295 2 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 15,538 $ 53 $ 46,782 $ 765 Income producing and other residential 7,516 53 8,464 45 Real estate construction and land: Commercial 5,432 101 5,670 89 Commercial: Asset-based 31,979 — 32,838 — Venture capital 1,194 — 4,474 — Other commercial 7,767 17 7,859 1,147 Consumer 524 2 79 — Total Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 26,283 $ 139 $ 73,425 $ 1,034 Real estate construction and land 5,432 101 5,670 89 Commercial 57,406 17 76,620 1,162 Consumer 524 2 374 2 Total $ 89,645 $ 259 $ 156,089 $ 2,287 _________________________ (1) For loans and leases reported as impaired at March 31, 2019 and 2018 , 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 loan portfolio segment and class for the periods indicated: Three Months Ended March 31, 2019 2018 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 1 $ 37 $ — — $ — $ — Income producing and other residential 3 789 789 — — — Commercial: Venture capital 6 2,105 1,242 — — — Other commercial 8 585 585 2 11,783 11,783 Total 18 $ 3,516 $ 2,616 2 $ 11,783 $ 11,783 During the three months ended March 31, 2019 , two other commercial loans totaling $64,000 were restructured in the preceding 12-month period and subsequently defaulted after being restructured. During the three months ended March 31, 2018 , one other commercial loan of $2.3 million was restructured in the preceding 12-month period and 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 and reserve for unfunded loan commitments for the periods indicated: Three Months Ended March 31, 2019 Allowance for Reserve for Total Loan and Unfunded Loan Allowance for Lease Losses Commitments Credit Losses (In thousands) Balance, beginning of period $ 132,472 $ 36,861 $ 169,333 Charge-offs (3,465 ) — (3,465 ) Recoveries 3,274 — 3,274 Net charge-offs (191 ) — (191 ) Provision 4,000 — 4,000 Balance, end of period $ 136,281 $ 36,861 $ 173,142 Three Months Ended March 31, 2018 Allowance for Reserve for Total Loan and Unfunded Loan Allowance for Lease Losses Commitments Credit Losses (In thousands) Balance, beginning of period (1) $ 139,456 $ 28,635 $ 168,091 Charge-offs (12,153 ) — (12,153 ) Recoveries 7,198 — 7,198 Net charge-offs (4,955 ) — (4,955 ) Provision (negative provision) (226 ) 4,226 4,000 Balance, end of period $ 134,275 $ 32,861 $ 167,136 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 loan portfolio segment for the periods indicated: Three Months Ended March 31, 2019 Real Estate Real Estate Construction Mortgage and Land Commercial Consumer Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period $ 46,021 $ 28,209 $ 56,360 $ 1,882 $ 132,472 Charge-offs (196 ) — (3,003 ) (266 ) (3,465 ) Recoveries 143 — 3,106 25 3,274 Net (charge-offs) recoveries (53 ) — 103 (241 ) (191 ) Provision (negative provision) (214 ) (1,001 ) 5,033 182 4,000 Balance, end of period $ 45,754 $ 27,208 $ 61,496 $ 1,823 $ 136,281 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 270 $ — $ 5,931 $ — $ 6,201 Collectively evaluated for impairment $ 45,484 $ 27,208 $ 55,565 $ 1,823 $ 130,080 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 23,908 $ 5,432 $ 71,660 $ — $ 101,000 Collectively evaluated for impairment 8,135,550 2,346,292 7,352,694 372,161 18,206,697 Ending balance $ 8,159,458 $ 2,351,724 $ 7,424,354 $ 372,161 $ 18,307,697 Three Months Ended March 31, 2018 Real Estate Real Estate Construction Mortgage and Land Commercial Consumer Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period (1) $ 40,051 $ 13,055 $ 84,022 $ 2,328 $ 139,456 Charge-offs (2,598 ) — (9,524 ) (31 ) (12,153 ) Recoveries 1,657 9 5,487 45 7,198 Net (charge-offs) recoveries (941 ) 9 (4,037 ) 14 (4,955 ) Provision (negative provision) 1,048 5,126 (6,205 ) (195 ) (226 ) Balance, end of period $ 40,158 $ 18,190 $ 73,780 $ 2,147 $ 134,275 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 1,088 $ — $ 13,141 $ 16 $ 14,245 Collectively evaluated for impairment $ 39,070 $ 18,190 $ 60,639 $ 2,131 $ 120,030 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 74,390 $ 5,670 $ 82,434 $ 324 $ 162,818 Collectively evaluated for impairment 7,479,853 1,671,332 6,743,689 397,593 16,292,467 Ending balance $ 7,554,243 $ 1,677,002 $ 6,826,123 $ 397,917 $ 16,455,285

Foreclosed Assets (Tables)

Foreclosed Assets (Tables)	3 Months Ended
	Mar. 31, 2019
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: March 31, December 31, Property Type 2019 2018 (In thousands) Commercial real estate $ 2,041 $ 2,004 Single-family residence 953 953 Construction and land development 219 219 Multi‑family — 1,059 Total other real estate owned, net 3,213 4,235 Other foreclosed assets 78 1,064 Total foreclosed assets, net $ 3,291 $ 5,299
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, 2018 $ 5,299 Transfers to foreclosed assets from loans 37 Provision for losses — Reductions related to sales (2,045 ) Balance, March 31, 2019 $ 3,291

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, December 31, March 31, 2019 2018 2018 (In thousands) Gross Amount of CDI and CRI: Balance, beginning of period $ 119,497 $ 119,497 $ 119,497 Balance, end of period 119,497 119,497 119,497 Accumulated Amortization: Balance, beginning of period (62,377 ) (57,391 ) (39,871 ) Amortization (4,870 ) (4,986 ) (6,346 ) Balance, end of period (67,247 ) (62,377 ) (46,217 ) Net CDI and CRI, end of period $ 52,250 $ 57,120 $ 73,280

Other Assets (Tables)

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Other Assets [Abstract]
Schedule of Other Assets	The following table presents the detail of our other assets as of the dates indicated: March 31, December 31, Other Assets 2019 2018 (In thousands) Cash surrender value of BOLI $ 196,161 $ 194,897 Operating lease ROU assets, net 125,402 — Interest receivable 89,727 88,754 LIHTC investments 59,948 59,507 CRA investments (1) 59,824 59,062 Taxes receivable 17,289 39,096 Prepaid expenses 16,319 18,006 Equity investments without readily determinable fair values 14,777 14,758 Equity warrants 4,438 4,793 Equity investments with readily determinable fair values 3,848 4,891 Other receivables/assets 22,998 39,132 Total other assets $ 610,731 $ 522,896 ________________________ (1) Includes equity investments without readily determinable fair values of $13.1 million and $12.5 million at March 31, 2019 and December 31, 2018 .

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Schedule of Occupancy Expense and Supplemental Cash Flow Information Related to Operating Leases	The following table presents supplemental cash flow information related to leases for the period indicated: Three Months Ended March 31, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,242 ROU assets obtained in exchange for lease obligations: Operating leases $ 147,972 Our lease expense is a component of "Occupancy expense" on our condensed consolidated statements of earnings. The following table presents the components of lease expense for the period indicated: Three Months Ended March 31, 2019 (In thousands) Operating lease expense: Fixed costs $ 8,302 Variable costs 24 Short-term lease costs 520 Sublease income (1,126 ) Net lease expense $ 7,720
Schedule of Supplemental Balance Sheet Information Related to Operating Leases	The following table presents supplemental balance sheet and other information related to operating leases as of the date indicated: March 31, 2019 (Dollars in thousands) Operating leases: Operating lease right-of-use assets, net $ 125,402 Operating lease liabilities $ 140,392 Weighted average remaining lease term (in years) 6 Weighted average discount rate 2.92 %
Schedule of Maturities of Operating Leases	The following table presents maturities of operating lease liabilities as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 32,749 2021 30,238 2022 25,928 2023 20,533 2024 17,600 Thereafter 26,875 Total operating lease liabilities 153,923 Less: Imputed interest (13,531 ) Present value of operating lease liabilities $ 140,392
Schedule of Payments to be Received on Operating Leases	The following table presents the rental payments to be received on operating leases as of the date indicated: March 31, 2019 (In thousands) Twelve Months Ending March 31, 2020 $ 34,368 2021 31,432 2022 23,162 2023 17,838 2024 16,104 Thereafter 41,444 Total undiscounted cash flows $ 164,348

Borrowings and Subordinated D_2

Borrowings and Subordinated Debentures (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Schedule of debt	The following table summarizes our borrowings as of the dates indicated: March 31, 2019 December 31, 2018 Weighted Weighted Average Average Amount Rate Amount Rate (Dollars in thousands) Non‑recourse debt $ 87 7.50 % $ 114 7.50 % FHLB secured advances 1,090,000 2.60 % 1,040,000 2.56 % FHLB unsecured overnight advance 141,000 2.57 % 141,000 2.53 % AFX borrowings 250,000 2.52 % 190,000 2.56 % Total borrowings $ 1,481,087 2.58 % $ 1,371,114 2.56 %
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: March 31, 2019 December 31, 2018 Date Maturity Rate Index Series Amount Rate Amount Rate Issued Date (Quarterly Reset) (Dollars in thousands) Trust V $ 10,310 5.71 % $ 10,310 5.89 % 8/15/2003 9/17/2033 3-month LIBOR + 3.10 Trust VI 10,310 5.66 % 10,310 5.84 % 9/3/2003 9/15/2033 3-month LIBOR + 3.05 Trust CII 5,155 5.56 % 5,155 5.74 % 9/17/2003 9/17/2033 3-month LIBOR + 2.95 Trust VII 61,856 5.50 % 61,856 5.27 % 2/5/2004 4/23/2034 3-month LIBOR + 2.75 Trust CIII 20,619 4.30 % 20,619 4.48 % 8/15/2005 9/15/2035 3-month LIBOR + 1.69 Trust FCCI 16,495 4.21 % 16,495 4.39 % 1/25/2007 3/15/2037 3-month LIBOR + 1.60 Trust FCBI 10,310 4.16 % 10,310 4.34 % 9/30/2005 12/15/2035 3-month LIBOR + 1.55 Trust CS 2005-1 82,475 4.56 % 82,475 4.74 % 11/21/2005 12/15/2035 3-month LIBOR + 1.95 Trust CS 2005-2 128,866 4.70 % 128,866 4.47 % 12/14/2005 1/30/2036 3-month LIBOR + 1.95 Trust CS 2006-1 51,545 4.70 % 51,545 4.47 % 2/22/2006 4/30/2036 3-month LIBOR + 1.95 Trust CS 2006-2 51,550 4.70 % 51,550 4.47 % 9/27/2006 10/30/2036 3-month LIBOR + 1.95 Trust CS 2006-3 (1) 28,914 1.74 % 29,556 1.73 % 9/29/2006 10/30/2036 3-month EURIBOR + 2.05 Trust CS 2006-4 16,470 4.70 % 16,470 4.47 % 12/5/2006 1/30/2037 3-month LIBOR + 1.95 Trust CS 2006-5 6,650 4.70 % 6,650 4.47 % 12/19/2006 1/30/2037 3-month LIBOR + 1.95 Trust CS 2007-2 39,177 4.70 % 39,177 4.47 % 6/13/2007 7/30/2037 3-month LIBOR + 1.95 Gross subordinated debentures 540,702 4.62 % 541,344 4.51 % Unamortized discount (2) (86,244 ) (87,498 ) Net subordinated debentures $ 454,458 $ 453,846 ___________________ (1) Denomination is in Euros with a value of €25.8 million . (2) Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments disclosure	March 31, December 31, 2019 2018 (In thousands) Loan commitments to extend credit $ 7,465,392 $ 7,528,248 Standby letters of credit 335,534 364,210 Commitments to contribute capital to low income housing project partnerships and small business investment companies 101,280 101,991 Commitments to contribute capital to private equity funds 50 50 Total $ 7,902,256 $ 7,994,499

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 Measured on a Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Residential MBS and CMOs: Agency MBS $ 343,176 $ — $ 343,176 $ — Agency CMOs 717,776 — 717,776 — Private label CMOs 123,247 — 116,211 7,036 Municipal securities 1,185,001 — 1,185,001 — Agency commercial MBS 1,078,911 — 1,078,911 — U.S. Treasury securities 290,717 290,717 — — Asset-backed securities 185,156 — 149,703 35,453 SBA securities 52,024 — 52,024 — Corporate debt securities 18,700 — 18,700 — Total securities available-for-sale 3,994,708 290,717 3,661,502 42,489 Equity warrants 4,438 — — 4,438 Other derivative assets 2,493 — 2,493 — Equity investments with readily determinable fair values 3,848 3,848 — — Total recurring assets $ 4,005,487 $ 294,565 $ 3,663,995 $ 46,927 Derivative liabilities $ 633 $ — $ 633 $ — Fair Value Measurements as of December 31, 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 $ 281,088 $ — $ 281,088 $ — Agency CMOs 632,850 — 632,850 — Private label CMOs 101,205 — 93,917 7,288 Municipal securities 1,312,194 — 1,312,194 — Agency commercial MBS 1,112,704 — 1,112,704 — U.S. Treasury securities 403,405 403,405 — — Asset-backed securities 81,385 — 41,440 39,945 SBA securities 67,047 — 67,047 — Corporate debt securities 17,553 — 17,553 — Total securities available-for-sale 4,009,431 403,405 3,558,793 47,233 Equity warrants 4,793 — — 4,793 Other derivative assets 3,292 — 3,292 — Equity investments with readily determinable fair values 4,891 4,891 — — Total recurring assets $ 4,022,407 $ 408,296 $ 3,562,085 $ 52,026 Derivative liabilities $ 142 $ — $ 142 $ —
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: March 31, 2019 Private Label CMOs Asset-Backed Securities Weighted Input or Weighted Range Average Range Average Unobservable Inputs of Inputs Input of Inputs Input Voluntary annual prepayment speeds 3.9% - 22.4% 10.8% 12.0% - 15.0% 13.8% Annual default rates (1) 0.3% - 82.0% 1.8% 2.0% 2.0% Loss severity rates (1) 5.6% - 159.5% 51.8% 60.0% 60.0% Discount rates 2.5% - 9.6% 6.4% 3.2% - 5.2% 4.2% ____________________ (1) The annual default rates and loss severity rates were the same for all of the asset-backed securities.
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: March 31, 2019 Equity Warrants Weighted Average Unobservable Inputs Input Volatility 17.0% Risk-free interest rate 2.2% Remaining life assumption (in years) 3.45
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, 2018 $ 7,288 $ 39,945 $ 4,793 Total included in earnings 137 (38 ) 2,279 Total included in other comprehensive income (84 ) 62 — Issuances — — 88 Sales and dispositions (1) — — (2,659 ) Net settlements (305 ) (4,516 ) — Transfers to Level 1 — — (63 ) Balance, March 31, 2019 $ 7,036 $ 35,453 $ 4,438
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 March 31, 2019 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired loans $ 27,901 $ — $ 7,886 $ 20,015 Loans held for sale 25,124 — 25,124 — Total non-recurring $ 53,025 $ — $ 33,010 $ 20,015 Fair Value Measurement as of December 31, 2018 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired loans $ 24,432 $ — $ 1,800 $ 22,632 OREO 1,136 — 1,136 — Total non-recurring $ 25,568 $ — $ 2,936 $ 22,632
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 Losses on Assets March 31, Measured on a Non‑Recurring Basis 2019 2018 (In thousands) Impaired loans $ 3,756 $ 7,816 Loans held for sale 1,707 — OREO — 65 Total losses $ 5,463 $ 7,881
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: March 31, 2019 Valuation Unobservable Weighted Asset Fair Value Technique Inputs Range Average (In thousands) Impaired loans $ 19,006 Discounted cash flows Discount rates 3.75% - 8.00% 6.43% Impaired loans 1,009 Third party appraisals No discounts Total non-recurring Level 3 $ 20,015
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: March 31, 2019 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 224,758 $ 224,758 $ 224,758 $ — $ — Interest‑earning deposits in financial institutions 332,124 332,124 332,124 — — Securities available‑for‑sale 3,994,708 3,994,708 290,717 3,661,502 42,489 Investment in FHLB stock 29,430 29,430 — 29,430 — Loans held for sale 25,124 25,124 — 25,124 — Loans and leases held for investment, net 18,171,416 17,719,820 — 7,886 17,711,934 Equity warrants 4,438 4,438 — — 4,438 Other derivative assets 2,493 2,493 — 2,493 — Equity investments with readily determinable fair values 3,848 3,848 3,848 — — Financial Liabilities: Core deposits 16,127,638 16,127,638 — 16,127,638 — Non-core non-maturity deposits 454,277 454,277 — 454,277 — Time deposits 2,704,012 2,697,119 — 2,697,119 — Borrowings 1,481,087 1,481,085 1,471,000 10,085 — Subordinated debentures 454,458 438,207 — 438,207 — Derivative liabilities 633 633 — 633 — December 31, 2018 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 175,830 $ 175,830 $ 175,830 $ — $ — Interest‑earning deposits in financial institutions 209,937 209,937 209,937 — — Securities available‑for‑sale 4,009,431 4,009,431 403,405 3,558,793 47,233 Investment in FHLB stock 32,103 32,103 — 32,103 — Loans and leases held for investment, net 17,825,241 17,013,860 — 1,800 17,012,060 Equity warrants 4,793 4,793 — — 4,793 Other derivative assets 3,292 3,292 — 3,292 — Equity investments with readily determinable fair values 4,891 4,891 4,891 — — Financial Liabilities: Core deposits 16,346,671 16,346,671 — 16,346,671 — Non-core non-maturity deposits 518,192 518,192 — 518,192 — Time deposits 2,005,638 2,017,137 — 2,017,137 — Borrowings 1,371,114 1,371,114 1,371,000 114 — Subordinated debentures 453,846 435,251 — 435,251 — Derivative liabilities 142 142 — 142 —

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, December 31, March 31, 2019 2018 2018 (Dollars in thousands, except per share data) Basic Earnings Per Share: Net earnings $ 112,604 $ 115,041 $ 118,276 Less: Earnings allocated to unvested restricted stock (1) (1,163 ) (1,219 ) (1,115 ) Net earnings allocated to common shares $ 111,441 $ 113,822 $ 117,161 Weighted-average basic shares and unvested restricted stock outstanding 122,227 123,238 127,487 Less: Weighted-average unvested restricted stock outstanding (1,352 ) (1,426 ) (1,413 ) Weighted-average basic shares outstanding 120,875 121,812 126,074 Basic earnings per share $ 0.92 $ 0.93 $ 0.93 Diluted Earnings Per Share: Net earnings allocated to common shares $ 111,441 $ 113,822 $ 117,161 Weighted-average basic shares outstanding 120,875 121,812 126,074 Diluted earnings per share $ 0.92 $ 0.93 $ 0.93 ________________________ (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.

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 Three Months Ended March 31, 2018 Total Revenue from Total Revenue from Recorded Contracts with Recorded Contracts with Revenue Customers Revenue Customers (In thousands) Total interest income $ 304,559 $ — $ 277,775 $ — Noninterest income: Service charges on deposit accounts 3,730 3,730 4,174 4,174 Other commissions and fees 11,008 4,538 10,265 4,651 Leased equipment income 9,282 — 9,587 — Gain on sale of loans — — 4,569 — Gain on sale of securities 2,161 — 6,311 — Other income 4,883 371 3,653 461 Total noninterest income 31,064 8,639 38,559 9,286 Total revenue $ 335,623 $ 8,639 $ 316,334 $ 9,286
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 March 31, 2019 2018 (In thousands) Products and services transferred at a point in time $ 4,546 $ 4,661 Products and services transferred over time 4,093 4,625 Total revenue from contracts with customers $ 8,639 $ 9,286
Contract with Customer, Asset and Liability	The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers: March 31, 2019 December 31, 2018 (In thousands) Receivables, which are included in "Other assets" $ 1,198 $ 1,334 Contract assets, which are included in "Other assets" $ — $ — Contract liabilities, which are included in "Accrued interest payable and other liabilities" $ 588 $ 621

Recently Issued Accounting St_2

Recently Issued Accounting Standards (Tables)	3 Months Ended
	Mar. 31, 2019
Recently Issued Accounting Standards [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2016-13, " Measurement of Credit Losses on Financial Instruments, " and ASU 2018-19, “ Codification Improvements to Topic 326, Financial Instruments - Credit Losses” 1. This Update changes the accounting and recognition of credit losses and impairment of financial assets recorded at amortized cost. Under the 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 requires loss estimates for the remaining estimated life of the financial assets using historical experience, current conditions and reasonable and supportable forecasts. 2. The Update amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. Receivables arising from operating leases are not within the scope of the new credit losses standard. 3. The Update must be applied using the modified retrospective method with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption. A prospective transition approach is required for available-for-sale debt securities for which an other-than-temporary impairment had been recognized before the adoption date. Early adoption is permitted. January 1, 2020 1. The Company has established a multidisciplinary project team and implementation plan, selected a software solution, reached preliminary accounting decisions on various matters, developed a conceptual framework, and developed regression models for the reasonable and supportable forecast period. 2. The Company continues to test and refine the CECL models and has begun parallel calculations, testing, and sensitivity analysis on its initial modeling assumptions and results. The ultimate impact is influenced by our portfolio characteristics, of which the vast majority is comprised of short-duration commercial loans; the macroeconomic conditions and forecasts at adoption; and other management judgments. 3. We plan to adopt this new standard on January 1, 2020. 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 on its consolidated financial position and results of operations. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2017-04, " Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" 1. This Update simplifies 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. 2. The goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount, and an impairment charge would be recognized 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. 3. The Update must be applied prospectively and early adoption is permitted. January 1, 2020 1. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations and we plan to adopt this standard on January 1, 2020. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2018-13, “ Fair Value Measurement (Topic 820): Disclosure Framework - Changes to Disclosure Requirements for Fair Value Measurements” 1. This Update modified the disclosure requirements in Topic 820 to add disclosures regarding changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements and the narrative description of measurement uncertainty. 2. Certain disclosure requirements in Topic 820 are also removed or modified. Certain disclosures in ASU 2018-13 would need to be applied on a retrospective basis and others on a prospective basis and early adoption is permitted. January 1, 2020 1. The adoption of this guidance will modify disclosures but will not have an impact on the Company’s consolidated financial position or results of operations. The Company has early adopted any removed or modified disclosures effective January 1, 2019 but will defer adoption of the additional disclosures until January 1, 2020 as permitted in the transition guidance in ASU 2018-13. Effective Effect on the Financial Statements Standard Description Date or Other Significant Matters ASU 2019-04, " Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments " 1. This Update made clarifications and amendments to five topics: (i) Topic A: Codification Improvements Resulting from the June and November 2018 Credit Losses Transition Resource Group ("TRG") Meetings, (ii) Topic B: Codification Improvements to ASU 2016-13, (iii) Topic C: Codification Improvements to ASU 2017-12, " Derivatives and Hedging (Topic 815) " and Other Hedging Items, (iv) Topic D: Codification Improvements to ASU 2016-01, " Financial Instruments - Overall (Subtopic 825-10) ," and (v) Topic E: Codification Improvements Resulting from the November 2018 Credit Losses TRG Meeting. 2. In addition to conforming amendments that correct for errors and oversights, the Update in Topics A, B, and E, which impacts CECL implementation, amends or clarifies guidance for accrued interest; transfers between classifications or categories of loans and debt securities; recoveries; effect of prepayments in determining the effective interest rate; estimated costs to sell when foreclosure is probable; vintage disclosure presentation related to line-of-credit arrangements converted to term loans; contractual extensions or renewals; and others. 3. Transition requirements for the amendments are the same as ASU 2016-13 for the Update in Topics A, B, and E. The Update in Topic C may be applied retrospectively as of the date of initial adoption of ASU 2017-012 or prospectively. The Update in Topic D must be applied on a modified retrospective method with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption and early adoption is permitted. January 1, 2020; except for Topic C - January 1, 2019 1. Impacts from the adoption of Topics A, B, and E within this Update will be considered in the Company's overall CECL implementation and we plan to adopt this Update concurrent with the adoption of ASU 2016-13. 2. The adoption of Topic D within this Update is not expected to have a material impact on the Company's consolidated financial position or results of operations and we plan to adopt this standard on January 1, 2020. 3. Topic C within this Update is not applicable to us and therefore there is no impact on the Company's consolidated financial position or results of operations.

Organization (Details Textual)

Organization (Details Textual) $ in Thousands		3 Months Ended
		Mar. 31, 2019USD ($)acquisitionbank_branch	Mar. 31, 2018USD ($)
Business Acquisition [Line Items]
Number of Businesses Acquired | acquisition		29
Cumulative effect of change in accounting principle | $	[1]	$ 938	$ 0
CALIFORNIA
Business Acquisition [Line Items]
Retail Branch Locations		74
NORTH CAROLINA
Business Acquisition [Line Items]
Retail Branch Locations		1
[1]	Three Months Ended March 31, 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, 2017128,782,878 $1,305 $4,287,487 $723,471 $(65,836) $31,171 $4,977,598Cumulative effect of changes in accounting principles (2)— — — (6,136) — 6,136 —Net earnings— — — 118,276 — — 118,276Other 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 forfeited96,034 1 7,198 — — — 7,199Restricted 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, 2018126,537,871 $1,283 $4,111,226 $835,611 $(68,694) $(11,936) $4,867,490

Restricted Cash Balances (Detai

Restricted Cash Balances (Details Textual) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Restricted Cash [Abstract]
Restricted Cash and Cash Equivalents	$ 92.2	$ 77
Pledged Cash for Derivative Contracts	$ 2.3	$ 2.6

Investment Securities (Details)

Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	$ 3,942,708	$ 4,017,909
Available-for-sale Securities, Gross Unrealized Gain	64,806	31,812
Available-for-sale Securities, Gross Unrealized Loss	(12,806)	(40,290)
Securities available‑for‑sale	3,994,708	4,009,431
Government agency and government-sponsored enterprise pass through securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	340,184	281,486
Available-for-sale Securities, Gross Unrealized Gain	3,990	1,902
Available-for-sale Securities, Gross Unrealized Loss	(998)	(2,300)
Securities available‑for‑sale	343,176	281,088
Government agency and government-sponsored enterprise collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	712,090	634,774
Available-for-sale Securities, Gross Unrealized Gain	8,625	3,448
Available-for-sale Securities, Gross Unrealized Loss	(2,939)	(5,372)
Securities available‑for‑sale	717,776	632,850
Private label collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	121,981	101,313
Available-for-sale Securities, Gross Unrealized Gain	2,205	1,985
Available-for-sale Securities, Gross Unrealized Loss	(939)	(2,093)
Securities available‑for‑sale	123,247	101,205
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	1,145,963	1,298,514
Available-for-sale Securities, Gross Unrealized Gain	40,748	21,000
Available-for-sale Securities, Gross Unrealized Loss	(1,710)	(7,320)
Securities available‑for‑sale	1,185,001	1,312,194
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	1,079,816	1,133,846
Available-for-sale Securities, Gross Unrealized Gain	4,460	383
Available-for-sale Securities, Gross Unrealized Loss	(5,365)	(21,525)
Securities available‑for‑sale	1,078,911	1,112,704
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	287,721	401,056
Available-for-sale Securities, Gross Unrealized Gain	2,996	2,437
Available-for-sale Securities, Gross Unrealized Loss	0	(88)
Securities available‑for‑sale	290,717	403,405
Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	185,592	81,762
Available-for-sale Securities, Gross Unrealized Gain	80	104
Available-for-sale Securities, Gross Unrealized Loss	(516)	(481)
Securities available‑for‑sale	185,156	81,385
SBA asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	52,361	68,158
Available-for-sale Securities, Gross Unrealized Gain	2	0
Available-for-sale Securities, Gross Unrealized Loss	(339)	(1,111)
Securities available‑for‑sale	52,024	67,047
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	1,700	553
Available-for-sale Securities, Gross Unrealized Loss	0	0
Securities available‑for‑sale	$ 18,700	$ 17,553

Investment Securities (Details

Investment Securities (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	$ 90,290	$ 316,746
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(327)	(2,032)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	1,103,263	1,706,835
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(12,479)	(38,258)
Unrealized Losses on Securities Available-for-Sale, Fair Value	1,193,553	2,023,581
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(12,806)	(40,290)
Government agency and government-sponsored enterprise pass through securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	0	60,164
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	0	(169)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	80,472	85,245
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(998)	(2,131)
Unrealized Losses on Securities Available-for-Sale, Fair Value	80,472	145,409
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(998)	(2,300)
Government agency and government-sponsored enterprise collateralized mortgage obligations
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	0	69,859
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	0	(326)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	148,729	164,097
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(2,939)	(5,046)
Unrealized Losses on Securities Available-for-Sale, Fair Value	148,729	233,956
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(2,939)	(5,372)
Private label collateralized mortgage obligations
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	10,003	32,170
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(6)	(831)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	74,242	49,237
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(933)	(1,262)
Unrealized Losses on Securities Available-for-Sale, Fair Value	84,245	81,407
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(939)	(2,093)
Municipal securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	0	52,386
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	0	(238)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	119,130	284,915
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(1,710)	(7,082)
Unrealized Losses on Securities Available-for-Sale, Fair Value	119,130	337,301
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(1,710)	(7,320)
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	0	40,641
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	0	(341)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	611,315	1,020,684
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(5,365)	(21,184)
Unrealized Losses on Securities Available-for-Sale, Fair Value	611,315	1,061,325
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(5,365)	(21,525)
US Treasury Securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value		49,729
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses		(88)
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		49,729
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses		(88)
Asset-backed Securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	80,287	11,548
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	(321)	(38)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	19,136	35,859
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(195)	(443)
Unrealized Losses on Securities Available-for-Sale, Fair Value	99,423	47,407
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	(516)	(481)
SBA asset-backed securities
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Fair Value	0	249
Unrealized Losses on Securities Available-for-Sale, Less than 12 Months, Gross Unrealized Losses	0	(1)
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Fair Value	50,239	66,798
Unrealized Losses on Securities Available-for-Sale, 12 Months or Longer, Gross Unrealized Losses	(339)	(1,110)
Unrealized Losses on Securities Available-for-Sale, Fair Value	50,239	67,047
Unrealized Losses on Securities Available-for-Sale, Gross Unrealized Losses	$ (339)	$ (1,111)

Investment Securities (Detail_2

Investment Securities (Details 2) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in one year or less	$ 28,716
Due after one year through five years	539,423
Due after five years through ten years	1,010,453
Due after ten years	2,364,116
Total securities available-for-sale	3,942,708	$ 4,017,909
Fair Value
Due in one year or less	28,703
Due after one year through five years	543,189
Due after five years through ten years	1,013,236
Due after ten years	2,409,580
Total securities available-for-sale	$ 3,994,708	$ 4,009,431

Investment Securities (Detail_3

Investment Securities (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Taxable interest	$ 19,742	$ 19,181	$ 14,599
Non-taxable interest	9,593	9,866	11,107
Dividend income	345	643	432
Total interest income on investment securities	$ 29,680	$ 29,690	$ 26,138

Investment Securities (Detail_4

Investment Securities (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
AFS securities pledged as collateral	$ 495,400,000
Proceeds from sales of securities available-for-sale	407,926,000	$ 306,253,000
Gross realized gains on sale of securities	4,100,000	6,800,000
Gross realized losses on sale of securities	(1,900,000)	(515,000)
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities available-for-sale	$ 405,800,000	$ 299,900,000

Loans and Leases (Details)

Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018		Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	$ 18,371,295	$ 18,026,365
Deferred fees, net	(63,598)	(68,652)
Loans held for investment, net	18,307,697	17,957,713
Allowance for loan and lease losses	(136,281)	(132,472)
Total loans and leases held for investment, net	18,171,416	17,825,241
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment, net		17,957,713	[1]	$ 16,455,285
Allowance for loan and lease losses				(134,275)	$ (139,456)
Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	8,172,992
Loans held for investment, net	8,159,458	7,918,141
Allowance for loan and lease losses	(45,754)	(46,021)
Real Estate Mortgage | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment		7,933,859
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment, net		7,918,141		7,554,243
Allowance for loan and lease losses				(40,158)	(40,051)
Real Estate Construction and Land
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	2,379,560
Loans held for investment, net	2,351,724	2,233,656
Allowance for loan and lease losses	(27,208)	(28,209)
Real Estate Construction and Land | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment		2,262,710
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment, net		2,233,656		1,677,002
Allowance for loan and lease losses				(18,190)	(13,055)
Commercial
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	7,446,612
Loans held for investment, net	7,424,354	7,404,595
Allowance for loan and lease losses	(61,496)	(56,360)
Commercial | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment		7,428,500
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment, net		7,404,595		6,826,123
Allowance for loan and lease losses				(73,780)	(84,022)
Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment	372,131
Loans held for investment, net	372,161	401,321
Allowance for loan and lease losses	$ (1,823)	(1,882)
Consumer | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases held for investment		401,296
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment, net		$ 401,321		397,917
Allowance for loan and lease losses				$ (2,147)	$ (2,328)
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Loans and Leases (Details 1)

Loans and Leases (Details 1) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018		Mar. 31, 2018
Delinquent loans in loan portfolio
30-89 Days Past Due		$ 30,587	$ 6,600
90 or More Days Past Due		11,944	10,700
Total Past Due		42,531
Current		18,265,166
Loans held for investment, net		18,307,697	17,957,713
Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	[1]		17,085
90 or More Days Past Due	[1]		10,723
Total Past Due	[1]		27,808
Current	[1]		17,929,905
Loans held for investment, net			17,957,713	[1]	$ 16,455,285
Real Estate Mortgage
Delinquent loans in loan portfolio
30-89 Days Past Due		9,119
90 or More Days Past Due		6,773
Total Past Due		15,892
Current		8,143,566
Loans held for investment, net		8,159,458	7,918,141
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			5,044
90 or More Days Past Due			8,017
Total Past Due			13,061
Current			7,905,080
Loans held for investment, net			7,918,141		7,554,243
Real Estate Mortgage | Commercial
Delinquent loans in loan portfolio
30-89 Days Past Due		7,266
90 or More Days Past Due		6,464
Total Past Due		13,730
Current		4,626,780
Loans held for investment, net		4,640,510	4,824,298
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			3,487
90 or More Days Past Due			7,541
Total Past Due			11,028
Current			4,813,270
Loans held for investment, net			4,824,298
Real Estate Mortgage | Residential Real Estate
Delinquent loans in loan portfolio
30-89 Days Past Due		1,853
90 or More Days Past Due		309
Total Past Due		2,162
Current		3,516,786
Loans held for investment, net		3,518,948	3,093,843
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			1,557
90 or More Days Past Due			476
Total Past Due			2,033
Current			3,091,810
Loans held for investment, net			3,093,843
Real Estate Construction and Land
Delinquent loans in loan portfolio
30-89 Days Past Due		8,949
90 or More Days Past Due		430
Total Past Due		9,379
Current		2,342,345
Loans held for investment, net		2,351,724	2,233,656
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			1,527
90 or More Days Past Due			442
Total Past Due			1,969
Current			2,231,687
Loans held for investment, net			2,233,656		1,677,002
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		430
Total Past Due		430
Current		943,166
Loans held for investment, net		943,596	912,583
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			442
Total Past Due			442
Current			912,141
Loans held for investment, net			912,583
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable
Delinquent loans in loan portfolio
30-89 Days Past Due		8,949
90 or More Days Past Due		0
Total Past Due		8,949
Current		1,399,179
Loans held for investment, net		1,408,128	1,321,073
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			1,527
90 or More Days Past Due			0
Total Past Due			1,527
Current			1,319,546
Loans held for investment, net			1,321,073
Commercial
Delinquent loans in loan portfolio
30-89 Days Past Due		11,905
90 or More Days Past Due		4,533
Total Past Due		16,438
Current		7,407,916
Loans held for investment, net		7,424,354	7,404,595
Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			9,933
90 or More Days Past Due			1,931
Total Past Due			11,864
Current			7,392,731
Loans held for investment, net			7,404,595		6,826,123
Commercial | Asset Based
Delinquent loans in loan portfolio
30-89 Days Past Due		3,750
90 or More Days Past Due		0
Total Past Due		3,750
Current		3,418,452
Loans held for investment, net		3,422,202	3,305,421
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			47
90 or More Days Past Due			646
Total Past Due			693
Current			3,304,728
Loans held for investment, net			3,305,421
Commercial | Venture Capital Loans
Delinquent loans in loan portfolio
30-89 Days Past Due		4,500
90 or More Days Past Due		1,194
Total Past Due		5,694
Current		2,021,756
Loans held for investment, net		2,027,450	2,038,748
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			4,705
90 or More Days Past Due			0
Total Past Due			4,705
Current			2,034,043
Loans held for investment, net			2,038,748
Commercial | Other Commercial
Delinquent loans in loan portfolio
30-89 Days Past Due		3,655
90 or More Days Past Due		3,339
Total Past Due		6,994
Current		1,967,708
Loans held for investment, net		1,974,702	2,060,426
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			5,181
90 or More Days Past Due			1,285
Total Past Due			6,466
Current			2,053,960
Loans held for investment, net			2,060,426
Consumer
Delinquent loans in loan portfolio
30-89 Days Past Due		614
90 or More Days Past Due		208
Total Past Due		822
Current		371,339
Loans held for investment, net		$ 372,161	401,321
Consumer | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due			581
90 or More Days Past Due			333
Total Past Due			914
Current			400,407
Loans held for investment, net			$ 401,321		$ 397,917
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Loans and Leases (Details 2)

Loans and Leases (Details 2) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018		Mar. 31, 2018
Financing Receivable, Impaired [Line Items]
Nonaccrual	$ 88,527	$ 79,333
Loans held for investment	18,307,697	17,957,713
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		79,333
Loans held for investment		17,957,713	[1]	$ 16,455,285
Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	18,219,170
Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		17,878,380
Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Nonaccrual	15,194
Loans held for investment	8,159,458	7,918,141
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		17,845
Loans held for investment		7,918,141		7,554,243
Real Estate Mortgage | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	8,144,264
Real Estate Mortgage | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		7,900,296
Real Estate Mortgage | Commercial
Financing Receivable, Impaired [Line Items]
Nonaccrual	12,750
Loans held for investment	4,640,510	4,824,298
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		15,321
Loans held for investment		4,824,298
Real Estate Mortgage | Commercial | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	4,627,760
Real Estate Mortgage | Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		4,808,977
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Impaired [Line Items]
Nonaccrual	2,444
Loans held for investment	3,518,948	3,093,843
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		2,524
Loans held for investment		3,093,843
Real Estate Mortgage | Residential Real Estate | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	3,516,504
Real Estate Mortgage | Residential Real Estate | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		3,091,319
Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Nonaccrual	430
Loans held for investment	2,351,724	2,233,656
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		442
Loans held for investment		2,233,656		1,677,002
Real Estate Construction and Land | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	2,351,294
Real Estate Construction and Land | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		2,233,214
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Impaired [Line Items]
Nonaccrual	430
Loans held for investment	943,596	912,583
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		442
Loans held for investment		912,583
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	943,166
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		912,141
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable
Financing Receivable, Impaired [Line Items]
Nonaccrual	0
Loans held for investment	1,408,128	1,321,073
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		0
Loans held for investment		1,321,073
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	1,408,128
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		1,321,073
Commercial
Financing Receivable, Impaired [Line Items]
Nonaccrual	72,476
Loans held for investment	7,424,354	7,404,595
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		60,003
Loans held for investment		7,404,595		6,826,123
Commercial | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	7,351,878
Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		7,344,592
Commercial | Asset Based
Financing Receivable, Impaired [Line Items]
Nonaccrual	43,406
Loans held for investment	3,422,202	3,305,421
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		32,324
Loans held for investment		3,305,421
Commercial | Asset Based | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	3,378,796
Commercial | Asset Based | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		3,273,097
Commercial | Venture Capital Loans
Financing Receivable, Impaired [Line Items]
Nonaccrual	20,437
Loans held for investment	2,027,450	2,038,748
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		20,299
Loans held for investment		2,038,748
Commercial | Venture Capital Loans | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	2,007,013
Commercial | Venture Capital Loans | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		2,018,449
Commercial | Other Commercial
Financing Receivable, Impaired [Line Items]
Nonaccrual	8,633
Loans held for investment	1,974,702	2,060,426
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		7,380
Loans held for investment		2,060,426
Commercial | Other Commercial | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	1,966,069
Commercial | Other Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		2,053,046
Consumer
Financing Receivable, Impaired [Line Items]
Nonaccrual	427
Loans held for investment	372,161	401,321
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual		1,043
Loans held for investment		401,321		$ 397,917
Consumer | Performing
Financing Receivable, Impaired [Line Items]
Loans held for investment	$ 371,734
Consumer | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment		$ 400,278
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Loans and Leases (Details 3)

Loans and Leases (Details 3) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018		Mar. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	$ 18,307,697	$ 17,957,713
Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	190,305	237,110
Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	292,780	261,398
Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	17,824,612	17,459,205
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		17,957,713	[1]	$ 16,455,285
Real Estate Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	8,159,458	7,918,141
Real Estate Mortgage | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	33,673	68,255
Real Estate Mortgage | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	67,567	75,753
Real Estate Mortgage | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	8,058,218	7,774,133
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		7,918,141		7,554,243
Real Estate Mortgage | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	4,640,510	4,824,298
Real Estate Mortgage | Commercial | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	24,542	57,734
Real Estate Mortgage | Commercial | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	67,115	74,785
Real Estate Mortgage | Commercial | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	4,548,853	4,691,779
Real Estate Mortgage | Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		4,824,298
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	3,518,948	3,093,843
Real Estate Mortgage | Residential Real Estate | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	9,131	10,521
Real Estate Mortgage | Residential Real Estate | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	452	968
Real Estate Mortgage | Residential Real Estate | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	3,509,365	3,082,354
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		3,093,843
Real Estate Construction and Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,351,724	2,233,656
Real Estate Construction and Land | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	430	442
Real Estate Construction and Land | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,485	8,568
Real Estate Construction and Land | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,348,809	2,224,646
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,233,656		1,677,002
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	943,596	912,583
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	430	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	0	7,041
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	943,166	905,100
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		912,583
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,408,128	1,321,073
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	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	2,485	1,527
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,405,643	1,319,546
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		1,321,073
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	7,424,354	7,404,595
Commercial | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	155,404	167,214
Commercial | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	222,091	176,062
Commercial | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	7,046,859	7,061,319
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		7,404,595		6,826,123
Commercial | Asset Based
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	3,422,202	3,305,421
Commercial | Asset Based | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	52,586	45,957
Commercial | Asset Based | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	85,060	48,338
Commercial | Asset Based | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	3,284,556	3,211,126
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		3,305,421
Commercial | Venture Capital Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,027,450	2,038,748
Commercial | Venture Capital Loans | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	43,128	28,731
Commercial | Venture Capital Loans | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	62,514	77,588
Commercial | Venture Capital Loans | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,921,808	1,932,429
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,038,748
Commercial | Other Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,974,702	2,060,426
Commercial | Other Commercial | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	59,690	92,526
Commercial | Other Commercial | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	74,517	50,136
Commercial | Other Commercial | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,840,495	1,917,764
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		2,060,426
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	372,161	401,321
Consumer | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	798	1,199
Consumer | Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	637	1,015
Consumer | Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	$ 370,726	399,107
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment		$ 401,321		$ 397,917
[1]	{F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmQzMzExZmVkOTBhODQ1NjA5NDk2ZjFhMTBlY2ExZGJjfFRleHRTZWxlY3Rpb246NzA2MUJGQzU1REJGNUU5M0JDNkEyQzdDNjc2NkFDREQM}

Loans and Leases (Details 4)

Loans and Leases (Details 4) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	$ 88,527	$ 79,333
Performing Restructured Loans	17,027	17,701
Total Impaired Loans and Leases	105,554	97,034
Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		79,333
Total Impaired Loans and Leases		97,034
Real Estate Mortgage
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	15,194
Performing Restructured Loans	11,355
Total Impaired Loans and Leases	26,549
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		17,845
Performing Restructured Loans		11,484
Total Impaired Loans and Leases		29,329
Real Estate Construction and Land
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	430
Performing Restructured Loans	5,002
Total Impaired Loans and Leases	5,432
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		442
Performing Restructured Loans		5,420
Total Impaired Loans and Leases		5,862
Commercial
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	72,476
Performing Restructured Loans	573
Total Impaired Loans and Leases	73,049
Commercial | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		60,003
Performing Restructured Loans		692
Total Impaired Loans and Leases		60,695
Consumer
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases	427
Performing Restructured Loans	97
Total Impaired Loans and Leases	$ 524
Consumer | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual loans and leases		1,043
Performing Restructured Loans		105
Total Impaired Loans and Leases		$ 1,148

Loans and Leases (Details 5)

Loans and Leases (Details 5) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		$ 6,201
Total Impaired Loans and Leases		105,554		$ 97,034
Impaired Financing Receivable, Unpaid Principal Balance		178,141
Impaired Financing Receivable, Average Recorded Investment	[1]	89,645
Impaired Financing Receivable, Interest Income, Accrual Method		259
Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		270
Total Impaired Loans and Leases		26,549
Impaired Financing Receivable, Unpaid Principal Balance		42,960
Impaired Financing Receivable, Average Recorded Investment	[1]	26,283
Impaired Financing Receivable, Interest Income, Accrual Method		139
Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		0
Total Impaired Loans and Leases		5,432
Impaired Financing Receivable, Unpaid Principal Balance		5,449
Impaired Financing Receivable, Average Recorded Investment	[1]	5,432
Impaired Financing Receivable, Interest Income, Accrual Method		101
Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		5,931
Total Impaired Loans and Leases		73,049
Impaired Financing Receivable, Unpaid Principal Balance		129,039
Impaired Financing Receivable, Average Recorded Investment	[1]	57,406
Impaired Financing Receivable, Interest Income, Accrual Method		17
Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		524
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		693
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	524
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		2
Total Impaired Loans and Leases		524
Impaired Financing Receivable, Unpaid Principal Balance		693
Impaired Financing Receivable, Average Recorded Investment	[1]	524
Impaired Financing Receivable, Interest Income, Accrual Method		2
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				4,031
Total Impaired Loans and Leases				97,034
Impaired Financing Receivable, Unpaid Principal Balance				171,923
Impaired Financing Receivable, Average Recorded Investment	[1]		$ 156,089
Impaired Financing Receivable, Interest Income, Accrual Method			2,287
Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				417
Total Impaired Loans and Leases				29,329
Impaired Financing Receivable, Unpaid Principal Balance				45,671
Impaired Financing Receivable, Average Recorded Investment	[1]		73,425
Impaired Financing Receivable, Interest Income, Accrual Method			1,034
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				0
Total Impaired Loans and Leases				5,862
Impaired Financing Receivable, Unpaid Principal Balance				5,870
Impaired Financing Receivable, Average Recorded Investment	[1]		5,670
Impaired Financing Receivable, Interest Income, Accrual Method			89
Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				3,614
Total Impaired Loans and Leases				60,695
Impaired Financing Receivable, Unpaid Principal Balance				118,912
Impaired Financing Receivable, Average Recorded Investment	[1]		76,620
Impaired Financing Receivable, Interest Income, Accrual Method			1,162
Non Purchased Credit Impaired Loans and Leases | Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment				1,148
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				1,470
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]		295
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			2
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		79
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Total Impaired Loans and Leases				1,148
Impaired Financing Receivable, Unpaid Principal Balance				1,470
Impaired Financing Receivable, Average Recorded Investment	[1]		374
Impaired Financing Receivable, Interest Income, Accrual Method			2
Asset Based | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		33,071
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		38,401
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	3,560
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	31,979
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Asset Based | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		10,335		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		10,335		0
Impaired Financing Receivable, with Related Allowance, Related Allowance		2,735		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment				32,324
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				38,100
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]		0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		32,838
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Venture Capital Loans | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		19,243
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		21,029
Impaired Financing Receivable, with Related Allowance, Related Allowance		3,196
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		1,194
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		31,632
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	12,906
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	1,194
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		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				11,621
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance				13,255
Impaired Financing Receivable, with Related Allowance, Related Allowance				3,141
Impaired Financing Receivable, with No Related Allowance, Recorded Investment				8,678
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				41,335
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]		14,598
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		4,474
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Other Commercial | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0
Impaired Financing Receivable, with Related Allowance, Related Allowance		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		9,206
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		27,642
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	7,767
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		17
Other Commercial | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment				473
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance				482
Impaired Financing Receivable, with Related Allowance, Related Allowance				473
Impaired Financing Receivable, with No Related Allowance, Recorded Investment				7,599
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				25,740
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]		16,851
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			15
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		7,859
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			1,147
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		5,432
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		5,449
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	5,432
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		101
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				5,862
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				5,870
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		5,670
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			89
Commercial | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,139
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,139
Impaired Financing Receivable, with Related Allowance, Related Allowance		68
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		15,727
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		29,962
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	1,139
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		17
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	15,538
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		53
Commercial | Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment				1,736
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance				1,648
Impaired Financing Receivable, with Related Allowance, Related Allowance				170
Impaired Financing Receivable, with No Related Allowance, Recorded Investment				17,783
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				32,035
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]		13,884
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			201
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		46,782
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			765
Residential Real Estate | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		2,090
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		2,084
Impaired Financing Receivable, with Related Allowance, Related Allowance		202
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		7,593
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		9,775
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	2,090
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		16
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	7,516
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		$ 53
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				2,569
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance				2,563
Impaired Financing Receivable, with Related Allowance, Related Allowance				247
Impaired Financing Receivable, with No Related Allowance, Recorded Investment				7,241
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance				$ 9,425
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]		4,295
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			23
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		8,464
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			$ 45
[1]	For loans and leases reported as impaired at March 31, 2019 and 2018, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

Loans and Leases (Details 6)

Loans and Leases (Details 6)	3 Months Ended
	Mar. 31, 2019USD ($)contract	Mar. 31, 2018USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of loans | contract	18	2
Pre-Modification Outstanding Recorded Investment	$ 3,516,000	$ 11,783,000
Post-Modification Outstanding Recorded Investment	$ 2,616,000	$ 11,783,000
Real Estate Mortgage | Commercial
Financing Receivable, Modifications [Line Items]
Number of loans | contract	1	0
Pre-Modification Outstanding Recorded Investment	$ 37,000	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of loans | contract	3	0
Pre-Modification Outstanding Recorded Investment	$ 789,000	$ 0
Post-Modification Outstanding Recorded Investment	$ 789,000	$ 0
Commercial | Other Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans	2	1
Commercial | Venture Capital Loans
Financing Receivable, Modifications [Line Items]
Number of loans	6	0
Pre-Modification Outstanding Recorded Investment	$ 2,105,000	$ 0
Post-Modification Outstanding Recorded Investment	$ 1,242,000	$ 0
Commercial | Other Commercial
Financing Receivable, Modifications [Line Items]
Number of loans	8	2
Pre-Modification Outstanding Recorded Investment	$ 585,000	$ 11,783,000
Post-Modification Outstanding Recorded Investment	$ 585,000	$ 11,783,000

Loans and Leases (Details 7)

Loans and Leases (Details 7) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Direct Financing Lease, Lease Income [Abstract]
Interest income on net investments in leases	$ 3,140
Direct Financing Lease, Net Investment in Leases [Abstract]
Lease payment receivable	195,018
Unguaranteed residual assets	25,895
Deferred fees and other	962
Aggregate net investment in leases	221,875
Sales-type and Direct Financing Leases, Lease Receivable, Rolling Maturity [Abstract]
2020	77,413
2021	63,321
2022	42,112
2023	15,386
2024	8,998
Thereafter	7,348
Total undiscounted cash flows	214,578
Less: Unearned income	(19,560)
Present value of lease payments	$ 195,018

Loans and Leases (Details 8)

Loans and Leases (Details 8) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 132,472
Charge-offs	(3,465)
Recoveries	3,274
Allowance for Loan and Lease Losses, Net charge-offs	(191)
Provision	4,000
Balance, end of period	136,281
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment	6,201
Collectively evaluated for impairment	130,080
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment	101,000
Collectively evaluated for impairment	18,206,697
Ending balance of loans and leases	18,307,697		$ 17,957,713
Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		$ 139,456
Charge-offs		(12,153)
Recoveries		7,198
Allowance for Loan and Lease Losses, Net charge-offs		(4,955)
Provision		(226)
Balance, end of period		134,275
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment		14,245
Collectively evaluated for impairment		120,030
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment		162,818
Collectively evaluated for impairment		16,292,467
Ending balance of loans and leases		16,455,285	17,957,713	[1]
Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		6,444
Real Estate Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	46,021
Charge-offs	(196)
Recoveries	143
Allowance for Loan and Lease Losses, Net charge-offs	(53)	(941)
Provision	(214)
Balance, end of period	45,754
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment	270
Collectively evaluated for impairment	45,484
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment	23,908
Collectively evaluated for impairment	8,135,550
Ending balance of loans and leases	8,159,458		7,918,141
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		40,051
Charge-offs		(2,598)
Recoveries		1,657
Provision		1,048
Balance, end of period		40,158
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment		1,088
Collectively evaluated for impairment		39,070
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment		74,390
Collectively evaluated for impairment		7,479,853
Ending balance of loans and leases		7,554,243	7,918,141
Real Estate Construction and Land
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	28,209
Charge-offs	0
Recoveries	0
Allowance for Loan and Lease Losses, Net charge-offs	0	9
Provision	(1,001)
Balance, end of period	27,208
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment	0
Collectively evaluated for impairment	27,208
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment	5,432
Collectively evaluated for impairment	2,346,292
Ending balance of loans and leases	2,351,724		2,233,656
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		13,055
Charge-offs		0
Recoveries		9
Provision		5,126
Balance, end of period		18,190
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment		0
Collectively evaluated for impairment		18,190
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment		5,670
Collectively evaluated for impairment		1,671,332
Ending balance of loans and leases		1,677,002	2,233,656
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	56,360
Charge-offs	(3,003)
Recoveries	3,106
Allowance for Loan and Lease Losses, Net charge-offs	103	(4,037)
Provision	5,033
Balance, end of period	61,496
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment	5,931
Collectively evaluated for impairment	55,565
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment	71,660
Collectively evaluated for impairment	7,352,694
Ending balance of loans and leases	7,424,354		7,404,595
Commercial | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		84,022
Charge-offs		(9,524)
Recoveries		5,487
Provision		(6,205)
Balance, end of period		73,780
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment		13,141
Collectively evaluated for impairment		60,639
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment		82,434
Collectively evaluated for impairment		6,743,689
Ending balance of loans and leases		6,826,123	7,404,595
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,882
Charge-offs	(266)
Recoveries	25
Allowance for Loan and Lease Losses, Net charge-offs	(241)	14
Provision	182
Balance, end of period	1,823
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment	0
Collectively evaluated for impairment	1,823
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment	0
Collectively evaluated for impairment	372,161
Ending balance of loans and leases	$ 372,161		401,321
Consumer | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period		2,328
Charge-offs		(31)
Recoveries		45
Provision		(195)
Balance, end of period		2,147
Amount of the allowance applicable to loans and leases:
Individually evaluated for impairment		16
Collectively evaluated for impairment		2,131
The ending balance of the loan and lease portfolio is composed of loans and leases:
Individually evaluated for impairment		324
Collectively evaluated for impairment		397,593
Ending balance of loans and leases		397,917	$ 401,321
Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for Loan and Lease Losses, Net charge-offs		$ (4,955)
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Loans and Leases (Details 9)

Loans and Leases (Details 9) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 132,472
Reserve for Unfunded Loan Commitments, Balance, beginning of period	36,861		$ 28,635
Allowance for Credit Losses, Balance, beginning of period	169,333
Allowance for Loan and Lease Losses, Charge-offs	(3,465)
Reserve for Unfunded Loan Commitments, Charge-offs	0		0
Allowance for Credit Losses, Charge-offs	(3,465)
Allowance for Loan and Lease Loss, Recoveries	3,274
Reserve for Unfunded Loan Commitments, Recoveries	0		0
Allowance for Credit Losses, Recoveries	3,274
Allowance for Loan and Lease Losses, Net charge-offs	(191)
Reserve for Unfunded Loan Commitments, Net charge-offs	0		0
Allowance For Credit Losses, Net charge-offs	(191)
Allowance for Loan and Lease Losses, Provision (negative provision)	4,000
Reserve for Unfunded Commitments, Provision (negative provision)	0		(4,226)
Allowance for Credit Losses, Provision (negative provision)	4,000	$ 12,000	4,000
Balance, end of period	136,281	132,472
Reserve for Unfunded Loan Commitments, Balance, end of period	36,861	36,861	32,861
Allowance for Credit Losses, Balance, end of period	$ 173,142	$ 169,333
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period			139,456
Allowance for Credit Losses, Balance, beginning of period			168,091
Allowance for Loan and Lease Losses, Charge-offs			(12,153)
Allowance for Credit Losses, Charge-offs			(12,153)
Allowance for Loan and Lease Loss, Recoveries			7,198
Allowance for Credit Losses, Recoveries			7,198
Allowance for Loan and Lease Losses, Net charge-offs			(4,955)
Allowance For Credit Losses, Net charge-offs			(4,955)
Allowance for Loan and Lease Losses, Provision (negative provision)			(226)
Allowance for Credit Losses, Provision (negative provision)			4,000
Balance, end of period			134,275
Allowance for Credit Losses, Balance, end of period			167,136
Purchased Credit Impaired Loans and Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period			$ 6,444

Loans and Leases (Details Textu

Loans and Leases (Details Textual) - USD ($)		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pre-Modification Outstanding Recorded Investment		$ 3,516,000	$ 11,783,000
Post-Modification Outstanding Recorded Investment		2,616,000	11,783,000
Nonaccrual loans and leases		88,527,000		$ 79,333,000
Receivable, 90 or more days past due		11,944,000		10,700,000
Receivable, 30-89 days past due		30,587,000		6,600,000
Financing receivable, nonaccrual status, current				62,000,000
Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		$ 52,400,000
Percentage of nonaccrual loans and leases		59.00%
Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases				79,333,000
Receivable, 90 or more days past due	[1]			10,723,000
Receivable, 30-89 days past due	[1]			17,085,000
Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable, 90 or more days past due		$ 11,900,000
Receivable, 30-89 days past due		2,400,000
Financing receivable, nonaccrual status, current		74,200,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		72,476,000
Receivable, 90 or more days past due		4,533,000
Receivable, 30-89 days past due		11,905,000
Commercial | Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases				60,003,000
Receivable, 90 or more days past due				1,931,000
Receivable, 30-89 days past due				9,933,000
Commercial | Other Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pre-Modification Outstanding Recorded Investment		585,000	11,783,000
Post-Modification Outstanding Recorded Investment		585,000	$ 11,783,000
Nonaccrual loans and leases		8,633,000
Receivable, 90 or more days past due		3,339,000
Receivable, 30-89 days past due		3,655,000
Commercial | Other Commercial | Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases				7,380,000
Receivable, 90 or more days past due				1,285,000
Receivable, 30-89 days past due				5,181,000
Commercial | Asset Based
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases		43,406,000
Receivable, 90 or more days past due		0
Receivable, 30-89 days past due		$ 3,750,000
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases				32,324,000
Receivable, 90 or more days past due				646,000
Receivable, 30-89 days past due				$ 47,000
Other Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 64,000	$ 2,300,000
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Foreclosed Assets (Details)

Foreclosed Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Total other real estate owned, net	$ 3,213	$ 4,235
Other foreclosed assets	78	1,064
Foreclosed assets, net	3,291	5,299
Commercial real estate
Total other real estate owned, net	2,041	2,004
Single-family residence
Total other real estate owned, net	953	953
Construction and land development
Total other real estate owned, net	219	219
Multi‑family
Total other real estate owned, net	$ 0	$ 1,059

Foreclosed Assets (Details 1)

Foreclosed Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Real Estate Owned Net Covered and NonCovered Including Foreclosed Assets [Abstract]
Balance, beginning of period	$ 5,299
Loans transferred to foreclosed assets	37	$ 0
Provision for losses	0
Reductions related to sales	(2,045)
Balance, end of period	$ 3,291

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018
Finite-lived Intangible Assets [Roll Forward]
CDI and CRI Balance, beginning of period	$ 119,497	$ 119,497		$ 119,497
Accumulated Amortization, beginning of period	(62,377)	(57,391)		(39,871)
Amortization	(4,870)	(4,986)	$ (4,986)	(6,346)
CDI and CRI Balance, end of period	119,497	119,497	119,497	119,497
Accumulated Amortization, end of period	(67,247)	(62,377)	$ (57,391)	(46,217)
Net CDI and CRI, end of period	$ 52,250	$ 57,120		$ 73,280

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization	$ 4,870	$ 4,986	$ 4,986	$ 6,346
Aggregate amortization expense 2019	14,600
Aggregate amortization expense 2020	10,800
Aggregate amortization expense 2021	7,500
Aggregate amortization expense 2022	3,800
Aggregate amortization expense 2023	$ 1,700
Scenario, Forecast
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization					$ 18,700

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Cash Surrender Value of Life Insurance	$ 196,161	$ 194,897
Finance Lease, Right-of-Use Asset	125,402	0
Interest and fees receivable income	89,727	88,754
Low Income Housing Tax Credit - LIHTC	59,948	59,507
Equity Method Investments, Other Asset Investments	59,824	59,062
Income Taxes Receivable	17,289	39,096
Prepaid Expense	16,319	18,006
Equity Investments Without Readily Determinable Fair Value	14,777	14,758
Equity Warrants	4,438	4,793
Equity Investments With Readily Determinable Fair Value	3,848	4,891
Other Assets, Miscellaneous	22,998	39,132
Other Assets	$ 610,731	$ 522,896

Other Assets (Details Textual)

Other Assets (Details Textual) - USD ($)	3 Months Ended	15 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Other Investment Not Readily Marketable [Line Items]
Equity Investments Without Readily Determinable Fair Value	$ 14,777,000	$ 14,777,000	$ 14,758,000
Equity Investments Without Readily Determinable Fair Value Other than Non-temporary Impairments	0
Equity Method Investment, Amount Sold	0	286,000
Equity Method Investment, Other than Temporary Impairment		278,000
Community Reinvestment Act Investments [Member]
Other Investment Not Readily Marketable [Line Items]
Equity Investments Without Readily Determinable Fair Value	$ 13,100,000	$ 13,100,000	$ 12,500,000

Leases - Narrative (Details)

Leases - Narrative (Details)	3 Months Ended
	Mar. 31, 2019bank_branchother_office
Lessee, Lease, Description [Line Items]
Number of full-service branch offices related to operating leases | bank_branch	75
Number of other offices related to operating leases | other_office	76
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Lease renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	28 years
Lease renewal term	10 years

Leases - Schedule of Occupancy

Leases - Schedule of Occupancy Expense and Supplemental Cash Flow Information Related to Operating Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Lease, Cost [Abstract]
Fixed costs	$ 8,302
Variable costs	24
Short-term lease costs	520
Sublease income	(1,126)
Net lease expense	7,720
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	8,242
ROU assets obtained in exchange for lease obligations:
Operating leases	$ 147,972

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related to Operating Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Operating leases:
Operating Lease, Right-of-Use Asset	$ 125,402
Operating Lease, Liability	$ 140,392
Weighted average remaining lease term (in years)	6 years
Weighted average discount rate	2.92%

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Operating Leases (Details) $ in Thousands	Mar. 31, 2019USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2020	$ 32,749
2021	30,238
2022	25,928
2023	20,533
2024	17,600
Thereafter	26,875
Total operating lease liabilities	153,923
Less: Imputed interest	(13,531)
Present value of operating lease liabilities	$ 140,392

Leases - Schedule of Payments t

Leases - Schedule of Payments to be Received on Operating Leases (Details) $ in Thousands	Mar. 31, 2019USD ($)
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
2020	$ 34,368
2021	31,432
2022	23,162
2023	17,838
2024	16,104
Thereafter	41,444
Total undiscounted cash flows	$ 164,348

Borrowings and Subordinated D_3

Borrowings and Subordinated Debentures (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Borrowings	$ 1,481,087	$ 1,371,114
Rate	2.58%	2.56%
Non‑recourse debt
Debt Instrument [Line Items]
Amount	$ 87	$ 114
Rate	7.50%	7.50%
AFX borrowings
Debt Instrument [Line Items]
Amount	$ 250,000	$ 190,000
Rate	2.52%	2.56%
Federal Home Loan Bank of San Francisco | FHLB secured advances
Debt Instrument [Line Items]
Amount	$ 1,090,000	$ 1,040,000
Rate	2.60%	2.56%
Federal Home Loan Bank of San Francisco | FHLB unsecured overnight advance
Debt Instrument [Line Items]
Amount	$ 141,000	$ 141,000
Rate	2.57%	2.53%

Borrowings and Subordinated D_4

Borrowings and Subordinated Debentures (Details 1) $ in Thousands, € in Millions		3 Months Ended
		Mar. 31, 2019USD ($)	Mar. 31, 2019EUR (€)	Dec. 31, 2018USD ($)
Subordinated Borrowing [Line Items]
Amount		$ 540,702		$ 541,344
Rate		2.58%	2.58%	2.56%
Unamortized discount		$ (86,244)		$ (87,498)
Net subordinated debentures		454,458		453,846
Subordinated Debt Trust V Due September 2033
Subordinated Borrowing [Line Items]
Amount		$ 10,310		$ 10,310
Rate		5.71%	5.71%	5.89%
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		5.66%	5.66%	5.84%
Date Issued		Sep. 3, 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		5.56%	5.56%	5.74%
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		5.50%	5.50%	5.27%
Date Issued		Feb. 5, 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		4.30%	4.30%	4.48%
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		4.21%	4.21%	4.39%
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		4.16%	4.16%	4.34%
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		4.56%	4.56%	4.74%
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		4.70%	4.70%	4.47%
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		4.70%	4.70%	4.47%
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		4.70%	4.70%	4.47%
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	[1]	$ 28,914		$ 29,556
Rate		1.74%	1.74%	1.73%
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		4.70%	4.70%	4.47%
Date Issued		Dec. 5, 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		4.70%	4.70%	4.47%
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		4.70%	4.70%	4.47%
Date Issued		Jun. 13, 2007
Maturity Date		Jul. 30, 2037
Description of variable rate basis		3-month LIBOR + 1.95
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%
Euribor Rate | Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.05%
[1]	Denomination is in Euros with a value of €25.8 million.

Borrowings and Subordinated D_5

Borrowings and Subordinated Debentures (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Non‑recourse debt
Debt Instrument [Line Items]
Weighted average remaining maturity period	9 months 20 days
Unused Lines of Credit
Debt Instrument [Line Items]
Amount outstanding	$ 0
Current borrowing capacity	180,000,000
Unused commitment fees	0
AFX borrowings
Debt Instrument [Line Items]
Amount outstanding	250,000,000	$ 190,000,000
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Loans pledged as collateral	3,000,000,000
Amount outstanding	0	0
Federal Reserve Bank Advances | FHLB secured advances
Debt Instrument [Line Items]
Borrowing capacity description	2,223,695,000
Federal Home Loan Bank of San Francisco
Debt Instrument [Line Items]
Loans pledged as collateral	5,700,000,000
Federal Home Loan Bank of San Francisco | FHLB secured advances
Debt Instrument [Line Items]
Borrowing capacity description	3,966,178,000
Current outstanding	1,090,000,000	1,040,000,000
Federal Home Loan Bank of San Francisco | FHLB unsecured overnight advance
Debt Instrument [Line Items]
Current outstanding	141,000,000	141,000,000
Federal Home Loan Bank of San Francisco | Unused Lines of Credit
Debt Instrument [Line Items]
Borrowing capacity description	141,000,000
Maturity Overnight [Member] | AFX borrowings
Debt Instrument [Line Items]
Amount outstanding	240,000,000
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	$ 1,000,000,000

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Loans and Leases Commitments To Extend Credit	$ 7,465,392,000	$ 7,528,248,000
Guarantor Obligations, Maximum Exposure, Undiscounted	335,534,000	364,210,000
Commitment To Contribute Capital	101,280,000	101,991,000
Remaining minimum amount committed	50,000	50,000
Unused Commitments to Extend Credit	$ 7,902,256,000	$ 7,994,499,000

Commitments and Contingencies_3

Commitments and Contingencies (Details Textual) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitment To Contribute Capital	$ 101,280,000	$ 101,991,000
Remaining minimum amount committed	$ 50,000	$ 50,000

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	$ 3,994,708	$ 4,009,431
Securities available-for-sale, at fair value	3,994,708	4,009,431
Fair Value, Estimate Not Practicable, Equity Method Investments	3,848	4,891
Derivative Liability	633	142
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity warrants		4,793
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	343,176	281,088
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	717,776	632,850
Private label collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	123,247	101,205
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,185,001	1,312,194
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	1,078,911	1,112,704
US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	290,717	403,405
Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	185,156	81,385
SBA asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	52,024	67,047
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	18,700	17,553
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	3,994,708
Equity warrants	4,438	4,793
Other derivative assets	2,493	3,292
Total recurring assets	4,005,487	4,022,407
Derivative liabilities	633	142
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	290,717	403,405
Equity warrants	0	0
Other derivative assets	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	3,848	4,891
Total recurring assets	294,565	408,296
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, at fair value	3,661,502	3,558,793
Equity warrants	0	0
Other derivative assets	2,493	3,292
Fair Value, Estimate Not Practicable, Equity Method Investments	0	0
Total recurring assets	3,663,995	3,562,085
Derivative liabilities	633	142
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	42,489	47,233
Equity warrants	4,438	4,793
Other derivative assets	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	0	0
Total recurring assets	46,927	52,026
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	343,176	281,088
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	343,176	281,088
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	717,776	632,850
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	717,776	632,850
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	123,247	101,205
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	116,211	93,917
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	7,036	7,288
Fair Value, Measurements, Recurring | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	1,185,001	1,312,194
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	1,185,001	1,312,194
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	1,078,911	1,112,704
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	1,078,911	1,112,704
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	290,717	403,405
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	290,717	403,405
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	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	0
Fair Value, Measurements, Recurring | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	185,156	81,385
Fair Value, Measurements, Recurring | 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 | Asset-backed Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	149,703	41,440
Fair Value, Measurements, Recurring | Asset-backed Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	35,453	39,945
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	52,024	67,047
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	52,024	67,047
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 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available‑for‑sale	18,700	17,553
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	18,700	17,553
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 (Deta_2

Fair Value Measurements (Details 1) - Level 3 - Fair Value, Measurements, Recurring	3 Months Ended
	Mar. 31, 2019
Minimum | Private label collateralized mortgage obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	3.90%
Annual default rates (1)	0.30%
Loss severity rates (1)	5.60%
Discount rates	2.50%
Minimum | Asset-backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	12.00%
Annual default rates (1)	2.00%
Loss severity rates (1)	60.00%
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	22.40%
Annual default rates (1)	82.00%
Loss severity rates (1)	159.50%
Discount rates	9.60%
Maximum | Asset-backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	15.00%
Annual default rates (1)	2.00%
Loss severity rates (1)	60.00%
Discount rates	5.20%
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	10.80%
Annual default rates (1)	1.80%
Loss severity rates (1)	51.80%
Discount rates	6.40%
Weighted Average | Private label collateralized mortgage obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	10.80%
Annual default rates (1)	1.80%
Loss severity rates (1)	51.80%
Discount rates	6.40%
Weighted Average | Asset-backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Voluntary annual prepayment speeds	13.80%
Annual default rates (1)	2.00%
Loss severity rates (1)	60.00%
Discount rates	4.20%

Fair Value Measurements (Deta_3

Fair Value Measurements (Details 2) - Weighted Average - Warrant - Fair Value, Measurements, Recurring - Level 3	3 Months Ended
	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Volatility	17.00%
Risk-free interest rate	2.20%
Remaining life assumption (in years)	3 years 5 months 12 days

Fair Value Measurements (Deta_4

Fair Value Measurements (Details 3)	3 Months Ended
	Mar. 31, 2019USD ($)
Level 3
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	$ 4,793,000
Total included in earnings, Equity Warrants	2,279,000
Total included in other comprehensive income	0
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	88,000
Sales, Equity Warrants	(2,659,000)
Net settlements, Equity Warrants	0
Fair Value, Measurements, Recurring
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	4,793,000
Equity warrants, Balance, end of period	4,438,000
Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	4,793,000
Equity warrants, Balance, end of period	4,438,000
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	7,288,000
Total included in earnings	137,000
Total included in other comprehensive income	(84,000)
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	(305,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	7,036,000
Asset-backed | Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	39,945,000
Total included in earnings	(38,000)
Total included in other comprehensive income	62,000
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	(4,516,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	35,453,000
Private label collateralized mortgage obligations
Level 3 CMO [Roll Forward]
Fair value transfers of assets measured on a recurring basis	0
Asset-backed 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	$ 63,000

Fair Value Measurements (Deta_5

Fair Value Measurements (Details 4) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 53,025	$ 25,568
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	33,010	2,936
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	20,015	22,632
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	27,901	24,432
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	7,886	1,800
Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 20,015	22,632
Other real estate and foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		1,136
Other real estate and foreclosed assets | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Other real estate and foreclosed assets | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		1,136
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

Fair Value Measurements (Deta_6

Fair Value Measurements (Details 5) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan Receivable Held-For-Sale, Charge-offs	$ 1,707	$ 0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total losses	5,463	7,881
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total losses	3,756	7,816
Other real estate and foreclosed assets | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total losses	$ 0	$ 65

Fair Value Measurements (Deta_7

Fair Value Measurements (Details 6) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 53,025	$ 25,568
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	20,015	22,632
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	27,901	24,432
Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	20,015	$ 22,632
Discount Rates | Discounted Cash Flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	19,006
No Discounts | Third party appraisals | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 1,009
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	8.00%
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	6.43%
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	6.43%

Fair Value Measurements (Deta_8

Fair Value Measurements (Details 7) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 53,025	$ 25,568
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	20,015	22,632
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	27,901	24,432
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	$ 20,015	$ 22,632
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	8.00%
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	6.43%
Discount Rates | Discounted Cash Flow | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 19,006
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	6.43%
No Discounts | Third party appraisals | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 1,009

Fair Value Measurements (Deta_9

Fair Value Measurements (Details 8) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 224,758	$ 175,830
Interest-earning deposits in financial institutions	332,124	209,937
Securities available-for-sale, Carrying Amount	3,994,708	4,009,431
Investment in FHLB stock, Carrying Amount	29,430	32,103
Investment in FHLB stock, Fair Value	29,430	32,103
Loans held for sale	25,124	0
Loans Held-for-sale, Fair Value Disclosure	25,124
Loans and leases, net	18,171,416	17,825,241
Loans and leases held for investment, net	17,719,820
Warrants and Rights Outstanding		4,793
Other derivative assets, Carrying Amount	2,493	3,292
Fair Value, Estimate Not Practicable, Equity Method Investments	3,848	4,891
Demand, interest checking, money market, and savings deposits	16,127,638	16,346,671
Interest-bearing Domestic Deposit, Brokered	454,277	518,192
Time deposits	2,704,012	2,005,638
Time deposits	2,697,119	2,017,137
Borrowings	1,481,087	1,371,114
Borrowings	1,481,085	1,371,114
Subordinated debentures	454,458	453,846
Subordinated debentures	438,207	435,251
Derivative Liability	633	142
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	224,758	175,830
Interest-earning deposits in financial institutions	332,124	209,937
Investment in FHLB stock, Fair Value	0	0
Loans Held-for-sale, Fair Value Disclosure	0
Demand, interest checking, money market, and savings deposits	0	0
Interest-bearing Domestic Deposit, Brokered	0	0
Time deposits	0	0
Borrowings	1,471,000	1,371,000
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
Investment in FHLB stock, Fair Value	29,430	32,103
Loans Held-for-sale, Fair Value Disclosure	25,124
Demand, interest checking, money market, and savings deposits	16,127,638	16,346,671
Interest-bearing Domestic Deposit, Brokered	454,277	518,192
Time deposits	2,697,119	2,017,137
Borrowings	10,085	114
Subordinated debentures	438,207	435,251
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
Investment in FHLB stock, Fair Value	0	0
Loans Held-for-sale, Fair Value Disclosure	0
Loans and leases held for investment, net	17,711,934
Equity warrants		4,793
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]
Equity warrants	4,438	4,793
Other derivative assets, Fair Value	2,493	3,292
Derivative liabilities	633	142
Fair Value, Measurements, Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, Carrying Amount	290,717	403,405
Equity warrants	0	0
Other derivative assets, Fair Value	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	3,848	4,891
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, Carrying Amount	3,661,502	3,558,793
Equity warrants	0	0
Other derivative assets, Fair Value	2,493	3,292
Fair Value, Estimate Not Practicable, Equity Method Investments	0	0
Derivative liabilities	633	142
Fair Value, Measurements, Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, Carrying Amount	42,489	47,233
Equity warrants	4,438	4,793
Other derivative assets, Fair Value	0	0
Fair Value, Estimate Not Practicable, Equity Method Investments	0	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	25,124
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 held for investment, net		17,013,860
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	$ 7,886	1,800
NonPCI and PCI Loans | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases held for investment, net		$ 17,012,060

Fair Value Measurements (Det_10

Fair Value Measurements (Details Textual)	3 Months Ended
	Mar. 31, 2019USD ($)
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	$ (63,000)

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Earnings Per Share [Abstract]
Net earnings from continuing operations		$ 112,604	$ 115,041	$ 118,276
Less: Earnings allocated to unvested restricted stock	[1]	(1,163)	(1,219)	(1,115)
Net earnings allocated to common shares		$ 111,441	$ 113,822	$ 117,161
Weighted-average basic shares and unvested restricted stock outstanding (shares)		122,227	123,238	127,487
Weighted-average unvested restricted stock outstanding (shares)		(1,352)	(1,426)	(1,413)
Weighted-average basic shares outstanding (shares)		120,875	121,812	126,074
Basic net income per share (usd per share)		$ 0.92	$ 0.93	$ 0.93
Net earnings from continuing operations allocated to common shares		$ 111,441	$ 113,822	$ 117,161
Diluted net income per share (usd per share)		$ 0.92	$ 0.93	$ 0.93
[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.

Revenue From Contracts With C_3

Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Interest and Dividend Income, Operating	$ 304,559	$ 302,739	$ 277,775
Service charges on deposit accounts	3,730	4,091	4,174
Other commissions and fees	11,008	11,114	10,265
Operating Leases, Income Statement, Lease Revenue	9,282	9,384	9,587
Gain on sale of loans and leases	0	0	4,569
Other income	4,883	8,151	3,653
Total noninterest income	31,064	33,526	38,559
Revenues	335,623		316,334
Revenue from Contract with Customer, Excluding Assessed Tax	8,639		9,286
Gain (Loss) on Investments	2,161	$ 786	6,311
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	3,730		4,174
Other commissions and fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,538		4,651
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	371		461
Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 8,639		$ 9,286

Revenue From Contracts With C_4

Revenue From Contracts With Customers (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue From Contracts With Customers [Abstract]
Products and services transferred at a point in time	$ 4,546	$ 4,661
Products and services transferred over time	4,093	4,625
Total revenue from contracts with customers	$ 8,639	$ 9,286

Revenue From Contracts With C_5

Revenue From Contracts With Customers (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Revenue From Contracts With Customers [Abstract]
Receivables, which are included in Other assets	$ 1,198	$ 1,334
Contract assets, which are included in Other assets	0	0
Contract liabilities, which are included in Accrued interest payable and other liabilities	$ 588	$ 621

Revenue From Contracts With C_6

Revenue From Contracts With Customers (Details Textual)	Dec. 31, 2018USD ($)
Revenue From Contracts With Customers [Abstract]
Contract with Customer, Liability	$ 33,000

Stock-Based Compensation (Detai

Stock-Based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	1,241,543	1,889,872
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	$ 5.8	$ 6.9	$ 7.2
Restricted Stock Awards And Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share based compensation expense	$ 49.7
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	276,386
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
Number of shares available for grant (shares)	3,069,009
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)	1,241,543

Subsequent Events (Details Text

Subsequent Events (Details Textuals) - $ / shares	May 01, 2019	Mar. 31, 2019	Mar. 31, 2018
Subsequent Event [Line Items]
Dividends declared per share (usd per share)		$ 0.60	$ 0.50
Subsequent Event | Dividend Declared
Subsequent Event [Line Items]
Dividends declared per share (usd per share)	$ 0.60