Pacwest Bancorp (PACW) 10-Q 10 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 26, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	PACWEST BANCORP
Entity Central Index Key	1,102,112
Document Period End Date	Mar. 31, 2017
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		119,870,416

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
ASSETS:
Cash and due from banks	$ 184,608	$ 337,965
Interest-earning deposits in financial institutions	111,892	81,705
Total cash and cash equivalents	296,500	419,670
Securities available-for-sale, at fair value	3,336,992	3,223,830
Federal Home Loan Bank stock, at cost	17,901	21,870
Total investment securities	3,354,893	3,245,700
Gross loans and leases	15,622,871	15,520,537
Deferred fees, net	(66,182)	(64,583)
Allowance for loan and lease losses	161,307	157,238
Total loans and leases, net	15,395,382	15,298,716
Equipment leased to others under operating leases	224,580	229,905
Premises and equipment, net	28,908	38,594
Foreclosed assets, net	12,842	12,976
Deferred tax asset, net	88,765	94,112
Goodwill	2,173,949	2,173,949
Core deposit and customer relationship intangibles, net	33,302	36,366
Other assets	318,133	319,779
Total assets	21,927,254	21,869,767
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits	6,789,808	6,659,016
Interest-bearing deposits	9,541,200	9,211,595
Total deposits	16,331,008	15,870,611
Borrowings	460,609	905,812
Subordinated debentures	442,516	440,744
Accrued interest payable and other liabilities	185,015	173,545
Total liabilities	17,419,148	17,390,712
Commitments and contingencies (Note 7)
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, 2017 and December 31, 2016; 122,968,677 and 122,803,029 shares issued, respectively, including 1,537,717 and 1,476,132 shares of unvested restricted stock, respectively)	1,230	1,228
Additional paid-in capital	4,108,478	4,162,132
Retained earnings	444,321	366,073
Treasury stock, at cost (1,560,544 and 1,519,360 shares at March 31, 2017 and December 31, 2016)	(58,641)	(56,360)
Accumulated other comprehensive income, net	12,718	5,982
Total stockholders' equity	4,508,106	4,479,055
Total liabilities and stockholders' equity	$ 21,927,254	$ 21,869,767

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2017	Dec. 31, 2016
Preferred stock par value (usd per share)	$ 0.01	$ 0.01
Preferred stock outstanding (shares)	5,000,000	5,000,000
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)	122,968,677	122,803,029
Unvested restricted shares (shares)	1,537,717	1,476,132
Treasury Stock (shares)	1,560,544	1,519,360

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Interest income:
Loans and leases	$ 224,178	$ 238,223	$ 236,375
Investment securities	23,039	23,403	22,547
Deposits in financial institutions	192	147	308
Total interest income	247,409	261,773	259,230
Interest expense:
Deposits	8,377	7,369	9,073
Borrowings	1,018	631	581
Subordinated debentures	5,562	5,468	4,982
Total interest expense	14,957	13,468	14,636
Net interest income	232,452	248,305	244,594
Provision for credit losses	24,728	23,215	20,140
Net interest income after provision for credit losses	207,724	225,090	224,454
Noninterest income:
Service charges on deposit accounts	3,758	3,557	3,856
Other commissions and fees	10,390	12,036	11,489
Leased equipment income	9,475	8,614	8,244
Gain on sale of loans and leases	712	119	245
Gain (loss) on sale of securities	(99)	515	8,110
FDIC loss sharing expense, net	0	0	(2,415)
Other income	10,878	4,054	5,010
Total noninterest income	35,114	28,895	34,539
Noninterest expense:
Compensation	64,880	66,013	61,065
Occupancy	11,608	12,076	12,632
Data processing	7,015	6,574	5,904
Other professional services	3,378	4,880	3,572
Insurance and assessments	4,791	4,124	4,965
Intangible asset amortization	3,064	3,176	4,746
Leased equipment depreciation	5,625	5,291	5,024
Foreclosed assets expense (income), net	143	2,693	(561)
Acquisition, integration and reorganization costs	500	0	200
Other expense	15,540	13,795	13,141
Total noninterest expense	116,544	118,622	110,688
Earnings before income taxes	126,294	135,363	148,305
Income tax expense	(47,626)	(49,716)	(57,849)
Net earnings	$ 78,668	$ 85,647	$ 90,456
Earnings per share:
Net earnings (usd per share)	$ 0.65	$ 0.71	$ 0.74
Net earnings (usd per share)	0.65	0.71	0.74
Dividends declared per share (usd per share)	$ 0.50	$ 0.50	$ 0.5

Condensed Consolidated Stateme5

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings		$ 78,668	$ 85,647	$ 90,456
Other comprehensive income (loss), net of tax:
Unrealized net holding gains (losses) on securities available-for-sale arising during the period		11,184	(111,045)	43,093
Income tax (expense) benefit related to unrealized holding gains (losses) arising during the period		(4,507)	45,259	(17,655)
Unrealized net holding gains (losses) on securities available-for-sale, net of tax		6,677	(65,786)	25,438
Reclassification adjustment for net (gains) losses included in net earnings	[1]	99	(515)	(8,110)
Income tax expense (benefit) related to reclassification adjustment		(40)	210	3,323
Reclassification adjustment for net (gains) losses included in net earnings, net of tax		59	(305)	(4,787)
Other comprehensive income (loss), net of tax		6,736	(66,091)	20,651
Comprehensive income		$ 85,404	$ 19,556	$ 111,107
[1]	Entire amounts are recognized in "Gain on sale of securities" on the Condensed Consolidated Statements of Earnings.

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Shareholders' Equity - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Shares Of Common Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance, December 31, 2016 at Dec. 31, 2016	$ 4,479,055		$ 1,228	$ 4,162,132	$ 366,073	$ (56,360)	$ 5,982
Shares outstanding, beginning balance (shares) at Dec. 31, 2016			121,283,669
Stockholders' Equity Disclosure [Rollforward]
Cumulative effect of change in accounting principle	291			711	(420)
Net earnings	78,668				78,668
Other comprehensive income - net unrealized gain on securities available-for-sale, net of tax	6,736						6,736
Restricted stock awarded and earned compensation, net of shares forfeited (shares)		165,648
Restricted stock awarded and earned stock compensation, net of shares forfeited	6,470		$ 2	6,468
Restricted stock surrendered (shares)			(41,184)
Restricted stock surrendered	(2,281)					(2,281)
Cash dividends paid	(60,833)			(60,833)
Balance, March 31, 2017 at Mar. 31, 2017	$ 4,508,106		$ 1,230	$ 4,108,478	$ 444,321	$ (58,641)	$ 12,718
Shares outstanding, ending balance (shares) at Mar. 31, 2017		121,408,133

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Cash flows from operating activities:
Net earnings	$ 78,668		$ 90,456
Depreciation and amortization	8,496		8,219
Amortization of net premiums on securities available-for-sale	10,601		9,523
Amortization of intangible assets	3,064	$ 3,176	4,746
Provision for credit losses	24,728	23,215	20,140
Gain on sale of foreclosed assets	0		(504)
Gain on sale of loans and leases	(712)	(119)	(245)
Gain on sale of premises and equipment	(560)		(6)
Loss (gain) on sale of securities	99		(8,110)
Gain on BOLI death benefit	(471)		(542)
Unrealized loss (gain) on derivatives and foreign currencies, net	202		(250)
Earned stock compensation	6,470		5,046
Loss on sale of PWEF leasing unit	0		720
Tax effect included in stockholders' equity of restricted stock vesting	0		(3,795)
Decrease in accrued and deferred income taxes, net	1,091		24,726
Decrease in other assets	661		5,756
Decrease (increase) in accrued interest payable and other liabilities	10,852		(23,722)
Net cash provided by operating activities	143,189		132,158
Cash flows from investing activities:
Net increase in loans and leases	(157,244)		(170,465)
Proceeds from sales of loans and leases	37,173		26,903
Proceeds from maturities and paydowns of securities available-for-sale	92,612		61,626
Proceeds from sales of securities available-for-sale	42,996		343,031
Purchases of securities available-for-sale	(248,187)		(52,236)
Net redemptions of Federal Home Loan Bank stock	3,969		2,460
Proceeds from sales of foreclosed assets	212		4,443
Purchases of premises and equipment, net	(1,944)		(2,896)
Proceeds from sales of premises and equipment	10,290		6
Proceeds from sale of leasing unit	0		138,809
Proceeds from BOLI death benefit	1,192		1,853
Net decrease (increase) of equipment leased to others under operating leases	114		(12,300)
Net cash (used in) provided by investing activities	(218,817)		341,234
Cash flows from financing activities:
Net increase (decrease) in noninterest-bearing deposits	131,170		(31,310)
Net increase (decrease) in interest-bearing deposits	329,605		(193,315)
Net decrease in borrowings	(445,203)		(68,483)
Common stock repurchased and restricted stock surrendered	(2,281)		(141)
Tax effect included in stockholders' equity of restricted stock vesting	0		3,795
Cash dividends paid	(60,833)		(60,906)
Net cash used in financing activities	(47,542)		(350,360)
Net (decrease) increase in cash and cash equivalents	(123,170)		123,032
Cash and cash equivalents, beginning of period	419,670		396,486
Cash and cash equivalents, end of period	296,500	$ 419,670	519,518
Supplemental disclosures of cash flow information:
Cash paid for interest	14,352		15,080
Cash paid for income taxes	2,834		15,773
Loans transferred to foreclosed assets	$ 78		$ 129

Organization

Organization	3 Months Ended
	Mar. 31, 2017
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 several loan production offices located in cities across the country. We provide commercial banking services, including real estate, construction, and commercial loans, and comprehensive deposit and treasury management services to small and middle-market businesses. We offer additional products and services through our CapitalSource and Square 1 Bank divisions. Our CapitalSource Division provides cash flow, asset-based, equipment, and real estate loans and treasury management services to established middle market businesses on a national basis. Our Square 1 Bank Division offers a comprehensive suite of financial services focused on entrepreneurial businesses and their venture capital and private equity investors, with offices located in key innovation hubs across the United States. In addition, we provide investment advisory and asset management services to select clients through Square 1 Asset Management, Inc., a wholly-owned subsidiary of the Bank and a SEC-registered investment adviser. We generate our revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities, and fees received in connection with deposit services, extending credit and other services offered, including foreign exchange services. Our major operating expenses are compensation, occupancy, general operating expenses, and the interest paid by the Bank on deposits and borrowings. We have completed 28 acquisitions from May 1, 2000 through March 31, 2017 . Our acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates. See Note 12. Subsequent Events , for information regarding the announcement of the CU Bancorp merger. Significant Accounting Policies Except as discussed below, 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, 2016 as filed with the Securities and Exchange Commission ("Form 10-K"). Accounting Standard Adopted in 2017 Effective January 1, 2017, the Company adopted ASU 2016-09, " Improvements to Employee Share-Based Accounting ." ASU 2016-09 changed aspects of the accounting for share-based payment award transactions, including: (1) accounting for income taxes; (2) classification of excess tax benefits on the statement of cash flows; (3) forfeitures; (4) minimum statutory tax withholding requirements; and (5) classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes. The recognition of excess tax benefits and tax deficiencies in the income statement was adopted prospectively. An income tax benefit of $1.1 million was recognized during the three months ended March 31, 2017 as a result of the adoption of ASU 2016-09. We expect the requirements of ASU 2016-09 to result in fluctuations in our effective tax rate from period to period based upon the timing of share-based award vestings. In connection with the adoption of ASU 2016-09, we elected to recognize forfeitures on stock-based compensation awards when they occur, instead of estimating forfeitures at the grant date of the awards and throughout the vesting period. The modified retrospective application of this change in accounting principle resulted in a cumulative adjustment charge to retained earnings of $420,000 , net of income taxes. We elected to present the classification of excess tax benefits on the statement of cash flows using a prospective transition method and the prior period has not been adjusted. 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 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 Certain prior period amounts have been reclassified to conform to the current period’s presentation format. Regarding time deposits disclosures, we previously presented the categories as: (1) under $100,000, and (2) $100,000 or more, but now are using the current FDIC insurance limit of $250,000 and presenting the categories as: (1) $250,000 and under, and (2) over $250,000.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2017
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 weighted average amortization period remaining for all of our CDI and CRI as of March 31, 2017 is 5.2 years. The aggregate CDI and CRI amortization expense is expected to be $11.5 million for 2017 . The estimated aggregate amortization expense related to these intangible assets for each of the next five years is $8.8 million for 2018 , $6.7 million for 2019 , $4.7 million for 2020 , $3.0 million for 2021 , and $1.7 million for 2022 . 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, 2017 2016 2016 (In thousands) Gross Amount of CDI and CRI: Balance, beginning of period $ 64,187 $ 73,702 $ 95,524 Fully amortized portion — (9,515 ) — Reduction due to sale of PWEF leasing unit — — (1,700 ) Balance, end of period 64,187 64,187 93,824 Accumulated Amortization: Balance, beginning of period (27,821 ) (34,160 ) (42,304 ) Amortization (3,064 ) (3,176 ) (4,746 ) Fully amortized portion — 9,515 — Reduction due to sale of PWEF leasing unit — — 1,363 Balance, end of period (30,885 ) (27,821 ) (45,687 ) Net CDI and CRI, end of period $ 33,302 $ 36,366 $ 48,137

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2017
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, 2017 December 31, 2016 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 $ 471,851 $ 6,088 $ (3,383 ) $ 474,556 $ 499,185 $ 6,222 $ (2,964 ) $ 502,443 Agency CMOs 137,720 1,661 (449 ) 138,932 145,258 1,528 (497 ) 146,289 Private label CMOs 147,818 3,461 (1,879 ) 149,400 122,707 4,199 (1,437 ) 125,469 Municipal securities 1,464,306 22,686 (3,711 ) 1,483,281 1,447,064 15,406 (6,011 ) 1,456,459 Agency commercial MBS 718,483 2,488 (8,900 ) 712,071 555,552 1,798 (9,658 ) 547,692 Corporate debt securities 17,000 1,211 — 18,211 47,100 680 (271 ) 47,509 Collateralized loan obligations 126,306 1,809 (142 ) 127,973 155,440 1,685 (238 ) 156,887 SBA securities 168,084 589 (339 ) 168,334 179,085 510 (750 ) 178,845 Asset-backed and other securities 63,966 460 (192 ) 64,234 62,264 358 (385 ) 62,237 Total $ 3,315,534 $ 40,453 $ (18,995 ) $ 3,336,992 $ 3,213,655 $ 32,386 $ (22,211 ) $ 3,223,830 As of March 31, 2017 , securities available-for-sale with a fair value of $424.7 million were pledged as collateral for borrowings, public deposits and other purposes as required by various statutes and agreements. During the three months ended March 31, 2017 , we sold $43.1 million of securities available-for-sale for a gross realized gain of $204,000 and a gross realized loss of $303,000 . During the three months ended March 31, 2016 , we sold $334.9 million of securities available-for-sale for a gross realized gain of $8.9 million and a gross realized loss of $0.8 million . 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, 2017 Less Than 12 Months 12 Months or More Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized Security Type Value Losses Value Losses Value Losses (In thousands) Residential MBS and CMOs: Agency MBS $ 139,928 $ (1,802 ) $ 113,812 $ (1,581 ) $ 253,740 $ (3,383 ) Agency CMOs 34,796 (312 ) 18,797 (137 ) 53,593 (449 ) Private label CMOs 88,381 (1,548 ) 24,843 (331 ) 113,224 (1,879 ) Municipal securities 334,546 (3,711 ) — — 334,546 (3,711 ) Agency commercial MBS 380,604 (8,900 ) — — 380,604 (8,900 ) Collateralized loan obligations 17,964 (24 ) 17,067 (118 ) 35,031 (142 ) SBA securities 44,618 (103 ) 29,674 (236 ) 74,292 (339 ) Asset-backed and other securities 15,972 (156 ) 6,957 (36 ) 22,929 (192 ) Total $ 1,056,809 $ (16,556 ) $ 211,150 $ (2,439 ) $ 1,267,959 $ (18,995 ) December 31, 2016 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 $ 149,281 $ (1,691 ) $ 122,902 $ (1,273 ) $ 272,183 $ (2,964 ) Agency CMOs 44,111 (416 ) 25,316 (81 ) 69,427 (497 ) Private label CMOs 49,067 (906 ) 30,155 (531 ) 79,222 (1,437 ) Municipal securities 644,424 (6,011 ) — — 644,424 (6,011 ) Agency commercial MBS 349,550 (9,658 ) — — 349,550 (9,658 ) Corporate debt securities 29,829 (271 ) — — 29,829 (271 ) Collateralized loan obligations 12,450 (37 ) 39,231 (201 ) 51,681 (238 ) SBA securities 69,293 (407 ) 39,024 (343 ) 108,317 (750 ) Asset-backed and other securities 18,213 (309 ) 7,851 (76 ) 26,064 (385 ) Total $ 1,366,218 $ (19,706 ) $ 264,479 $ (2,505 ) $ 1,630,697 $ (22,211 ) We reviewed the securities that were in a loss position at March 31, 2017 , and concluded their 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, 2017 Amortized Fair Maturity Cost Value (In thousands) Due in one year or less $ 18,084 $ 18,221 Due after one year through five years 235,439 238,871 Due after five years through ten years 879,297 885,026 Due after ten years 2,182,714 2,194,874 Total securities available-for-sale $ 3,315,534 $ 3,336,992 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, 2017 2016 2016 (In thousands) Taxable interest $ 12,166 $ 11,849 $ 11,396 Non-taxable interest 10,381 10,323 10,726 Dividend income 492 1,231 425 Total interest income on investment securities $ 23,039 $ 23,403 $ 22,547

Loans and Leases

Loans and Leases	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Loans and Leases	LOANS AND LEASES Our loan and lease portfolio includes originated and purchased loans and leases. Originated and purchased loans and leases for which there was no evidence of credit deterioration at their acquisition date and for which it was probable that we would be able to collect all contractually required payments, are referred to collectively as Non-PCI loans. Generally, PCI loans are purchased loans for which there was, at the acquisition date, evidence of credit deterioration since their origination and for which it was probable that collection of all contractually required payments was unlikely. Non-PCI 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. PCI loans are accounted for in accordance with ASC Subtopic 310‑30, “ Loans and Debt Securities Acquired with Deteriorated Credit Quality." For PCI loans, at the time of acquisition we (i) calculate the contractual amount and timing of undiscounted principal and interest payments (the "undiscounted contractual cash flows") and (ii) estimate the amount and timing of undiscounted expected principal and interest payments (the "undiscounted expected cash flows"). The difference between the undiscounted contractual cash flows and the undiscounted expected cash flows is the nonaccretable difference. The difference between the undiscounted cash flows expected to be collected and the estimated fair value of the acquired loans is the accretable yield. The nonaccretable difference represents an estimate of the loss exposure of principal and interest related to the PCI loan portfolio; such amount is subject to change over time based on the performance of such loans. The carrying value of PCI loans is reduced by payments received, both principal and interest, and increased by the portion of the accretable yield recognized as interest income. The following table summarizes the composition of our loan and lease portfolio as of the dates indicated: March 31, 2017 December 31, 2016 Non-PCI Non-PCI Loans PCI Loans PCI and Leases Loans Total and Leases Loans Total (In thousands) Real estate mortgage $ 5,904,995 $ 88,918 $ 5,993,913 $ 5,635,675 $ 92,793 $ 5,728,468 Real estate construction and land 1,123,123 2,326 1,125,449 975,032 2,409 977,441 Commercial 8,115,953 4,863 8,120,816 8,426,236 12,994 8,439,230 Consumer 382,447 246 382,693 375,149 249 375,398 Total gross loans and leases 15,526,518 96,353 15,622,871 15,412,092 108,445 15,520,537 Deferred fees, net (66,164 ) (18 ) (66,182 ) (64,562 ) (21 ) (64,583 ) Total loans and leases, net of deferred fees 15,460,354 96,335 15,556,689 15,347,530 108,424 15,455,954 Allowance for loan and lease losses (149,826 ) (11,481 ) (161,307 ) (143,755 ) (13,483 ) (157,238 ) Total loans and leases, net $ 15,310,528 $ 84,854 $ 15,395,382 $ 15,203,775 $ 94,941 $ 15,298,716 Non‑PCI Loans and Leases The following tables present an aging analysis of our Non‑PCI loans and leases by portfolio segment and class as of the dates indicated: March 31, 2017 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 9,218 $ 3,975 $ 13,193 $ 4,365,745 $ 4,378,938 Residential 844 1,879 2,723 1,505,308 1,508,031 Total real estate mortgage 10,062 5,854 15,916 5,871,053 5,886,969 Real estate construction and land: Commercial — — — 666,185 666,185 Residential — 362 362 441,689 442,051 Total real estate construction and land — 362 362 1,107,874 1,108,236 Commercial: Cash flow 598 2,915 3,513 3,129,896 3,133,409 Asset-based 500 204 704 2,390,379 2,391,083 Venture capital 14,381 257 14,638 1,920,311 1,934,949 Equipment finance 251 — 251 622,986 623,237 Total commercial 15,730 3,376 19,106 8,063,572 8,082,678 Consumer 77 — 77 382,394 382,471 Total Non-PCI loans and leases $ 25,869 $ 9,592 $ 35,461 $ 15,424,893 $ 15,460,354 December 31, 2016 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 8,590 $ 3,303 $ 11,893 $ 4,341,740 $ 4,353,633 Residential 5,694 1,999 7,693 1,256,630 1,264,323 Total real estate mortgage 14,284 5,302 19,586 5,598,370 5,617,956 Real estate construction and land: Commercial — — — 578,838 578,838 Residential 364 — 364 383,637 384,001 Total real estate construction and land 364 — 364 962,475 962,839 Commercial: Cash flow 191 1,821 2,012 3,105,380 3,107,392 Asset-based 1,500 2 1,502 2,607,543 2,609,045 Venture capital 13,589 5,769 19,358 1,963,798 1,983,156 Equipment finance 1,417 3,051 4,468 687,499 691,967 Total commercial 16,697 10,643 27,340 8,364,220 8,391,560 Consumer 224 — 224 374,951 375,175 Total Non-PCI loans and leases $ 31,569 $ 15,945 $ 47,514 $ 15,300,016 $ 15,347,530 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 Non‑PCI loans and leases by portfolio segment and class as of the dates indicated: March 31, 2017 December 31, 2016 Nonaccrual Performing Total Nonaccrual Performing Total (In thousands) Real estate mortgage: Commercial $ 66,216 $ 4,312,722 $ 4,378,938 $ 62,454 $ 4,291,179 $ 4,353,633 Residential 5,826 1,502,205 1,508,031 6,881 1,257,442 1,264,323 Total real estate mortgage 72,042 5,814,927 5,886,969 69,335 5,548,621 5,617,956 Real estate construction and land: Commercial — 666,185 666,185 — 578,838 578,838 Residential 362 441,689 442,051 364 383,637 384,001 Total real estate construction and land 362 1,107,874 1,108,236 364 962,475 962,839 Commercial: Cash flow 53,611 3,079,798 3,133,409 53,908 3,053,484 3,107,392 Asset-based 1,165 2,389,918 2,391,083 2,118 2,606,927 2,609,045 Venture capital 15,289 1,919,660 1,934,949 11,687 1,971,469 1,983,156 Equipment finance 30,388 592,849 623,237 32,848 659,119 691,967 Total commercial 100,453 7,982,225 8,082,678 100,561 8,290,999 8,391,560 Consumer 173 382,298 382,471 339 374,836 375,175 Total Non-PCI loans and leases $ 173,030 $ 15,287,324 $ 15,460,354 $ 170,599 $ 15,176,931 $ 15,347,530 At March 31, 2017 , nonaccrual loans and leases totaled $173.0 million and included $9.6 million of loans and leases 90 or more days past due, $4.0 million of loans and leases 30 to 89 days past due, and $159.4 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 $170.6 million at December 31, 2016 , including $15.9 million of the loans and leases 90 or more days past due, $3.0 million of loans and leases 30 to 89 days past due, and $151.7 million of current loans and leases that were placed on nonaccrual status based on management’s judgment regarding their collectability. The following table presents the credit risk rating categories for Non‑PCI loans and leases by portfolio segment and class as of the dates indicated. Nonclassified loans and leases are those with a credit risk rating of either pass or special mention, while classified loans and leases are those with a credit risk rating of either substandard or doubtful. March 31, 2017 December 31, 2016 Classified Nonclassified Total Classified Nonclassified Total (In thousands) Real estate mortgage: Commercial $ 100,202 $ 4,278,736 $ 4,378,938 $ 99,641 $ 4,253,992 $ 4,353,633 Residential 9,680 1,498,351 1,508,031 17,540 1,246,783 1,264,323 Total real estate mortgage 109,882 5,777,087 5,886,969 117,181 5,500,775 5,617,956 Real estate construction and land: Commercial 403 665,782 666,185 409 578,429 578,838 Residential 362 441,689 442,051 364 383,637 384,001 Total real estate construction and land 765 1,107,471 1,108,236 773 962,066 962,839 Commercial: Cash flow 175,511 2,957,898 3,133,409 177,661 2,929,731 3,107,392 Asset-based 32,285 2,358,798 2,391,083 28,112 2,580,933 2,609,045 Venture capital 75,222 1,859,727 1,934,949 52,646 1,930,510 1,983,156 Equipment finance 30,388 592,849 623,237 32,848 659,119 691,967 Total commercial 313,406 7,769,272 8,082,678 291,267 8,100,293 8,391,560 Consumer 346 382,125 382,471 424 374,751 375,175 Total Non-PCI loans and leases $ 424,399 $ 15,035,955 $ 15,460,354 $ 409,645 $ 14,937,885 $ 15,347,530 In addition to our internal risk rating process, our federal and state banking regulators, as an integral part of their examination process, periodically review the Company’s loan and lease risk rating classifications. Our regulators may require the Company to recognize rating downgrades based on their judgments related to information available to them at the time of their examinations. Risk rating downgrades generally result in increases in the provisions for credit losses and the allowance for credit losses. Non‑PCI nonaccrual loans and leases and performing troubled debt restructured loans are considered impaired for reporting purposes. Troubled debt restructurings 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 as of the dates indicated: March 31, 2017 December 31, 2016 Performing Total Performing Total Nonaccrual Troubled Impaired Nonaccrual Troubled Impaired Loans Debt Loans Loans Debt Loans and Restructured and and Restructured and Leases Loans Leases Leases Loans Leases (In thousands) Real estate mortgage $ 72,042 $ 47,119 $ 119,161 $ 69,335 $ 54,750 $ 124,085 Real estate construction and land 362 6,321 6,683 364 6,893 7,257 Commercial 100,453 2,920 103,373 100,561 3,157 103,718 Consumer 173 141 314 339 152 491 Total $ 173,030 $ 56,501 $ 229,531 $ 170,599 $ 64,952 $ 235,551 The following tables present information regarding our Non‑PCI impaired loans and leases by portfolio segment and class as of and for the dates indicated: March 31, 2017 December 31, 2016 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 $ 14,350 $ 15,257 $ 633 $ 63,325 $ 65,031 $ 6,266 Residential 3,502 3,570 437 8,424 8,612 585 Real estate construction and land: Residential — — — 213 213 — Commercial: Cash flow 50,690 65,605 8,901 51,272 52,910 12,474 Asset-based 1,430 1,423 144 4,395 4,861 2,144 Venture capital 12,206 12,254 3,222 5,821 5,880 3,294 Equipment finance — — — 1,524 4,636 — Consumer 187 191 90 270 280 170 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 96,032 $ 105,317 $ 44,557 $ 51,402 Residential 5,277 6,408 7,779 8,940 Real estate construction and land: Commercial 6,111 6,111 6,680 6,680 Residential 572 576 364 366 Commercial: Cash flow 2,925 5,718 2,852 5,939 Asset-based 2,651 3,782 664 1,652 Venture capital 3,083 9,907 5,866 8,939 Equipment finance 30,388 51,682 31,324 53,319 Consumer 127 198 221 292 Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 119,161 $ 130,552 $ 1,070 $ 124,085 $ 133,985 $ 6,851 Real estate construction and land 6,683 6,687 — 7,257 7,259 — Commercial 103,373 150,371 12,267 103,718 138,136 17,912 Consumer 314 389 90 491 572 170 Total $ 229,531 $ 287,999 $ 13,427 $ 235,551 $ 279,952 $ 24,933 Three Months Ended March 31, 2017 2016 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 $ 14,350 $ 206 $ 19,471 $ 243 Residential 3,501 12 4,198 24 Real estate construction and land: Residential — — 743 4 Commercial: Cash flow 43,172 — 20,823 12 Asset-based 1,162 15 3,696 27 Venture capital 4,693 — — — Equipment finance — — 49,322 — Consumer 187 — 341 3 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 92,753 $ 560 $ 54,132 $ 217 Residential 5,216 15 5,405 14 Real estate construction and land: Commercial 6,111 67 7,202 62 Residential 572 2 — — Commercial: Cash flow 2,821 5 2,683 1 Asset-based 2,279 25 1,181 15 Venture capital 2,429 — — — Equipment finance 30,388 — — — Consumer 127 2 797 — Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 115,820 $ 793 $ 83,206 $ 498 Real estate construction and land 6,683 69 7,945 66 Commercial 86,944 45 77,705 55 Consumer 314 2 1,138 3 Total $ 209,761 $ 909 $ 169,994 $ 622 _________________________ (1) For Non-PCI loans and leases reported as impaired at March 31, 2017 and 2016 , amounts were calculated based on the period of time such loans and leases were impaired during the reported period. The following table presents new troubled debt restructurings of Non-PCI loans for the periods indicated: Three Months Ended March 31, 2017 2016 Pre- Post- Pre- Post- Modification Modification Modification Modification Outstanding Outstanding Outstanding Outstanding Number Recorded Recorded Number Recorded Recorded Troubled Debt Restructurings of Loans Investment Investment of Loans Investment Investment (Dollars in thousands) Real estate mortgage: Commercial 1 $ 64 $ — 4 $ 3,140 $ 3,140 Residential 2 42 42 1 165 165 Commercial: Cash flow 2 106 106 4 257 257 Asset-based 2 613 613 2 629 629 Venture capital 3 13,065 13,065 — — — Equipment finance — — — 2 2,660 2,660 Consumer 1 97 97 1 60 60 Total 11 $ 13,987 $ 13,923 14 $ 6,911 $ 6,911 The following table presents troubled debt restructurings that subsequently defaulted for the periods indicated: Three Months Ended March 31, 2017 2016 Troubled Debt Restructurings Number Recorded Number Recorded That Subsequently Defaulted of Loans Investment (1) of Loans Investment (1) (Dollars in thousands) Real estate mortgage: Commercial — $ — 1 $ 230 Consumer 1 28 — — Total 1 $ 28 (2) 1 $ 230 (3) _________________________ (1) The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. For example, for the 12-month period ended March 31, 2017 , the population of defaulted restructured loans includes only those loans restructured after March 31, 2016 . The table excludes defaulted troubled restructurings in those classes for which the recorded investment was zero at the end of the period. (2) Represents the balance at March 31, 2017 , and there were no charge-offs. (3) Represents the balance at March 31, 2016 , and there were no charge-offs. Allowance for Loan and Lease Losses The following tables present a summary of the activity in the allowance for loan and lease losses on Non‑PCI loans and leases by portfolio segment and PCI loans for the periods indicated: Three Months Ended March 31, 2017 Real Estate Real Estate Construction Total Total Mortgage and Land Commercial Consumer Non-PCI PCI Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period $ 37,765 $ 10,045 $ 93,853 $ 2,092 $ 143,755 $ 13,483 $ 157,238 Charge-offs (1,544 ) — (19,285 ) (99 ) (20,928 ) (2,230 ) (23,158 ) Recoveries 230 8 2,448 53 2,739 — 2,739 Provision (negative provision) (1,083 ) 423 25,118 (198 ) 24,260 228 24,488 Balance, end of period $ 35,368 $ 10,476 $ 102,134 $ 1,848 $ 149,826 $ 11,481 $ 161,307 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 1,070 $ — $ 12,267 $ 90 $ 13,427 Collectively evaluated for impairment $ 34,298 $ 10,476 $ 89,867 $ 1,758 $ 136,399 Acquired loans with deteriorated credit quality $ 11,481 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 118,275 $ 6,683 $ 103,221 $ 281 $ 228,460 Collectively evaluated for impairment 5,768,694 1,101,553 7,979,457 382,190 15,231,894 Acquired loans with deteriorated credit quality $ 96,335 Ending balance $ 5,886,969 $ 1,108,236 $ 8,082,678 $ 382,471 $ 15,460,354 $ 96,335 $ 15,556,689 Three Months Ended March 31, 2016 Real Estate Real Estate Construction Total Total Mortgage and Land Commercial Consumer Non-PCI PCI Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period $ 36,654 $ 7,137 $ 61,082 $ 661 $ 105,534 $ 9,577 $ 115,111 Charge-offs (737 ) — (4,045 ) (591 ) (5,373 ) (163 ) (5,536 ) Recoveries 999 152 314 16 1,481 — 1,481 Provision (negative provision) (7,817 ) (413 ) 26,606 789 19,165 140 19,305 Balance, end of period $ 29,099 $ 6,876 $ 83,957 $ 875 $ 120,807 $ 9,554 $ 130,361 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 1,954 $ 21 $ 27,902 $ 163 $ 30,040 Collectively evaluated for impairment $ 27,145 $ 6,855 $ 56,055 $ 712 $ 90,767 Acquired loans with deteriorated credit quality $ 9,554 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 90,830 $ 7,945 $ 96,614 $ 1,102 $ 196,491 Collectively evaluated for impairment 5,539,467 567,528 7,893,955 109,520 14,110,470 Acquired loans with deteriorated credit quality $ 176,556 Ending balance $ 5,630,297 $ 575,473 $ 7,990,569 $ 110,622 $ 14,306,961 $ 176,556 $ 14,483,517

Foreclosed Assets

Foreclosed Assets	3 Months Ended
	Mar. 31, 2017
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 2017 2016 (In thousands) Construction and land development $ 11,224 $ 11,224 Multi‑family 601 652 Commercial real estate 78 — Total other real estate owned, net 11,903 11,876 Other foreclosed assets 939 1,100 Total foreclosed assets, net $ 12,842 $ 12,976 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, 2016 $ 12,976 Foreclosures 78 Reductions related to sales (212 ) Balance, March 31, 2017 $ 12,842

Borrowings and Subordinated Deb

Borrowings and Subordinated Debentures	3 Months Ended
	Mar. 31, 2017
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, 2017 December 31, 2016 Weighted Weighted Average Average Amount Rate Amount Rate (Dollars in thousands) Non‑recourse debt $ 609 6.58 % $ 812 6.41 % FHLB secured advances 290,000 0.80 % 735,000 0.59 % FHLB unsecured overnight advance 130,000 0.81 % 130,000 0.55 % American Financial Exchange borrowings 40,000 1.05 % 40,000 0.81 % Total borrowings $ 460,609 $ 905,812 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, 2017 , this debt had a weighted average remaining maturity of 2.0 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, 2017 of $2.7 billion , collateralized by a blanket lien on $3.9 billion of certain qualifying loans not pledged to the FRBSF. As of March 31, 2017 , the balance outstanding was a $290.0 million overnight advance. As of December 31, 2016 , the balance outstanding was $735.0 million , which consisted of a $435.0 million overnight advance and a $300.0 million one-month advance with a January 23, 2017 maturity date. FRBSF Secured Line of Credit. The Bank has a secured line of credit with the FRBSF. As of March 31, 2017 , the Bank had secured borrowing capacity of $2.2 billion collateralized by liens covering $3.0 billion of certain qualifying loans. As of March 31, 2017 and December 31, 2016 , there were no balances outstanding. FHLB Unsecured Line of Credit. The Bank has a $130.0 million unsecured line of credit with the FHLB for the purchase of overnight funds, of which $130.0 million was outstanding at March 31, 2017 . At December 31, 2016 , the balance outstanding was $130.0 million . Federal Funds Arrangements with Commercial Banks. As of March 31, 2017 , the Bank had unsecured lines of credit of $80.0 million with correspondent banks for the purchase of overnight funds, subject to availability of funds. These lines are renewable annually and have no unused commitment fees. As of March 31, 2017 and December 31, 2016 , there were no balances outstanding. The Bank is a member of the American Financial Exchange, 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, 2017 , the balance outstanding was $40.0 million , which consisted of a $36.0 million overnight borrowing and a total of $4.0 million in two separate one-month borrowings, comprised of $2.0 million with an April 17, 2017 maturity date and another $2.0 million with an April 28, 2017 maturity date. At December 31, 2016 , the balance outstanding was $40.0 million , which consisted of a $26.0 million overnight borrowing and a $14.0 million one-month borrowing with an January 20, 2017 maturity date. Subordinated Debentures The following table summarizes the terms of each issuance of subordinated debentures outstanding as of the dates indicated: March 31, 2017 December 31, 2016 Date Maturity Rate Index Series Amount Rate Amount Rate Issued Date (Quarterly Reset) (Dollars in thousands) Trust V $ 10,310 4.25 % $ 10,310 4.09 % 8/15/2003 9/17/2033 3 month LIBOR + 3.10 Trust VI 10,310 4.18 % 10,310 4.01 % 9/3/2003 9/15/2033 3 month LIBOR + 3.05 Trust CII 5,155 4.10 % 5,155 3.95 % 9/17/2003 9/17/2033 3 month LIBOR + 2.95 Trust VII 61,856 3.79 % 61,856 3.64 % 2/5/2004 4/23/2034 3 month LIBOR + 2.75 Trust CIII 20,619 2.82 % 20,619 2.65 % 8/15/2005 9/15/2035 3 month LIBOR + 1.69 Trust FCCI 16,495 2.73 % 16,495 2.56 % 1/25/2007 3/15/2037 3 month LIBOR + 1.60 Trust FCBI 10,310 2.68 % 10,310 2.51 % 9/30/2005 12/15/2035 3 month LIBOR + 1.55 Trust CS 2005-1 82,475 3.08 % 82,475 2.91 % 11/21/2005 12/15/2035 3 month LIBOR + 1.95 Trust CS 2005-2 128,866 2.99 % 128,866 2.84 % 12/14/2005 1/30/2036 3 month LIBOR + 1.95 Trust CS 2006-1 51,545 2.99 % 51,545 2.84 % 2/22/2006 4/30/2036 3 month LIBOR + 1.95 Trust CS 2006-2 51,550 2.99 % 51,550 2.84 % 9/27/2006 10/30/2036 3 month LIBOR + 1.95 Trust CS 2006-3 (1) 27,572 1.72 % 27,185 1.74 % 9/29/2006 10/30/2036 3 month EURIBOR + 2.05 Trust CS 2006-4 16,470 2.99 % 16,470 2.84 % 12/5/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2006-5 6,650 2.99 % 6,650 2.84 % 12/19/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2007-2 39,177 2.99 % 39,177 2.84 % 6/13/2007 7/30/2037 3 month LIBOR + 1.95 Gross subordinated debentures 539,360 538,973 Unamortized discount (2) (96,844 ) (98,229 ) Net subordinated debentures $ 442,516 $ 440,744 ___________________ (1) Denomination is in Euros with a value of €25.8 million . (2) Amount represents the fair value adjustment on subordinated debentures assumed in acquisitions. Interest payments made by the Company on subordinated debentures are considered dividend payments under FRB regulations. Bank holding companies, such as PacWest, are required to notify the FRB prior to declaring and paying a dividend during any period in which quarterly and/or cumulative twelve‑month net earnings are insufficient to fund the dividend amount, among other requirements.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Lending Commitments The Company is a party to financial instruments with off‑balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the condensed consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments. The following table presents a summary of the financial instruments described above as of the dates indicated: March 31, December 31, 2017 2016 (In thousands) Loan commitments to extend credit $ 4,497,373 $ 4,166,703 Standby letters of credit 221,718 211,398 $ 4,719,091 $ 4,378,101 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment 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, we invest 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, 2017 and December 31, 2016 , we had commitments to contribute capital to these entities totaling $31.7 million and $26.6 million . We also had commitments to contribute up to an additional $2.4 million and $2.8 million to private equity funds at March 31, 2017 and December 31, 2016 . In addition, at March 31, 2017 , we had a commitment to purchase approximately $6.8 million of loans that terminates in June 2017. The amount purchased will be based, in part, on the amount of portfolio paydowns which occur during the commitment period. 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. Kinde Durkee Investigation The United States Attorney's Office for the Eastern District of California is conducting an investigation relating to the handling by First California Bank ("FCB") of its banking relationship with Kinde Durkee. Ms. Durkee, who had maintained certain of her accounts with FCB, was convicted in 2012 of embezzling funds from certain California politicians, among others. FCB, a wholly-owned subsidiary of FCAL, was acquired by PacWest Bancorp and merged into Pacific Western Bank in May 2013. We understand that the investigation is focused on whether any civil or criminal laws were violated by FCB or its employees. Pacific Western is cooperating with the investigation.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2017
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 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. We use 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, 2017 Measured on a Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Residential MBS and CMOs: Agency MBS $ 474,556 $ — $ 474,556 $ — Agency CMOs 138,932 — 138,932 — Private label CMOs 149,400 — 104,119 45,281 Municipal securities 1,483,281 — 1,483,281 — Agency commercial MBS 712,071 — 712,071 — Corporate debt securities 18,211 — 18,211 — Collateralized loan obligations 127,973 — 127,973 — SBA securities 168,334 — 168,334 — Asset-backed and other securities 64,234 1,960 54,398 7,876 Total securities available-for-sale 3,336,992 1,960 3,281,875 53,157 Derivative assets 427 — 427 — Equity warrants 5,368 — — 5,368 Total recurring assets $ 3,342,787 $ 1,960 $ 3,282,302 $ 58,525 Derivative liabilities $ 3,295 $ — $ 3,295 $ — Fair Value Measurements as of December 31, 2016 Measured on a Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Residential MBS and CMOs: Agency MBS $ 502,443 $ — $ 502,443 $ — Agency CMOs 146,289 — 146,289 — Private label CMOs 125,469 — 68,567 56,902 Municipal securities 1,456,459 — 1,456,459 — Agency commercial MBS 547,692 — 547,692 — Corporate debt securities 47,509 — 47,509 — Collateralized loan obligations 156,887 — 156,887 — SBA securities 178,845 — 178,845 — Asset-backed and other securities 62,237 2,080 51,784 8,373 Total securities available-for-sale 3,223,830 2,080 3,156,475 65,275 Derivative assets 694 — 694 — Equity warrants 5,497 — — 5,497 Total recurring assets $ 3,230,021 $ 2,080 $ 3,157,169 $ 70,772 Derivative liabilities $ 3,285 $ — $ 3,285 $ — During the three months ended March 31, 2017 , there were no transfers of assets between Level 1 and Level 2, and no transfers in or out of Level 3 of the fair value hierarchy for assets 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, 2017 Private Label CMOs Asset-Backed Securities (1) Weighted Weighted Range Average Range Average Unobservable Inputs of Inputs Input of Inputs Input Voluntary annual prepayment speeds 2.4% - 32.6% 8.8% 5% - 5% 5.0% Annual default rates 0% - 14.5% 2.3% 1% - 1% 1.0% Loss severity rates 0% - 92.9% 41.0% 15% - 15% 15.0% Discount rates 0% - 10.3% 4.4% 3.5% - 3.5% 3.5% _________________________________ (1) There was only one asset-backed security at March 31, 2017 . 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, 2017 Equity Warrants Weighted Average Unobservable Inputs Input Volatility 17.8% Risk-free interest rate 1.7% Remaining life assumption (in years) 3.8 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, 2016 $ 56,902 $ 8,373 $ 5,497 Total included in earnings 1,063 25 155 Total included in other comprehensive income (534 ) (42 ) — Sales (4,732 ) — (518 ) Issuances — — 234 Net settlements (7,418 ) (480 ) — Balance, March 31, 2017 $ 45,281 $ 7,876 $ 5,368 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, 2017 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 73,047 $ — $ — $ 73,047 Fair Value Measurement as of December 31, 2016 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 149,749 $ — $ 1,661 $ 148,088 OREO 11,224 — 11,224 — Investments carried at cost 242 — — 242 Total non-recurring $ 161,215 $ — $ 12,885 $ 148,330 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 2017 2016 (In thousands) Impaired Non‑PCI loans $ 13,617 $ 12,909 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, 2017 Valuation Unobservable Weighted Asset Fair Value Technique Inputs Range Average (In thousands) Impaired Non-PCI loans $ 65,114 Discounted cash flows Discount rates 0% - 8.75% 6.60% 7,933 Third party appraisals No discounts Total non-recurring Level 3 $ 73,047 ASC Topic 825, “ Financial Instruments ,” requires disclosure of the estimated fair value of certain financial instruments and the methods and significant assumptions used to estimate such fair values. Additionally, certain financial instruments and all nonfinancial instruments are excluded from the applicable disclosure requirements. The following tables present a summary of the carrying values and estimated fair values of certain financial instruments as of the dates indicated: March 31, 2017 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 184,608 $ 184,608 $ 184,608 $ — $ — Interest‑earning deposits in financial institutions 111,892 111,892 111,892 — — Securities available‑for‑sale 3,336,992 3,336,992 1,960 3,281,875 53,157 Investment in FHLB stock 17,901 17,901 — 17,901 — Investments carried at cost 1,175 12,412 — — 12,412 Loans and leases, net 15,395,382 15,526,920 — — 15,526,920 Derivative assets 427 427 — 427 — Equity warrants 5,368 5,368 — — 5,368 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 13,923,143 13,923,143 — 13,923,143 — Time deposits 2,407,865 2,399,793 — 2,399,793 — Borrowings 460,609 460,627 456,000 4,627 — Subordinated debentures 442,516 425,914 — 425,914 — Derivative liabilities 3,295 3,295 — 3,295 — December 31, 2016 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 337,965 $ 337,965 $ 337,965 $ — $ — Interest‑earning deposits in financial institutions 81,705 81,705 81,705 — — Securities available‑for‑sale 3,223,830 3,223,830 2,080 3,156,475 65,275 Investment in FHLB stock 21,870 21,870 — 21,870 — Investments carried at cost 1,416 3,843 — — 3,843 Loans and leases, net 15,298,716 15,494,808 — 1,661 15,493,147 Derivative assets 694 694 — 694 — Equity warrants 5,497 5,497 — — 5,497 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 13,698,321 13,698,321 — 13,698,321 — Time deposits 2,172,290 2,166,187 — 2,166,187 — Borrowings 905,812 905,838 591,000 314,838 — Subordinated debentures 440,744 424,507 — 424,507 — Derivative liabilities 3,285 3,285 — 3,285 — 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), 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 2016 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, 2017 , 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, 2017
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, 2017 2016 2016 (Dollars in thousands, except per share data) Basic Earnings Per Share: Net earnings $ 78,668 $ 85,647 $ 90,456 Less: Earnings allocated to unvested restricted stock (1) (999 ) (1,004 ) (1,067 ) Net earnings allocated to common shares $ 77,669 $ 84,643 $ 89,389 Weighted-average basic shares and unvested restricted stock outstanding 121,346 121,464 121,598 Less: Weighted-average unvested restricted stock outstanding (1,503 ) (1,450 ) (1,392 ) Weighted-average basic shares outstanding 119,843 120,014 120,206 Basic earnings per share $ 0.65 $ 0.71 $ 0.74 Diluted Earnings Per Share: Net earnings allocated to common shares $ 77,669 $ 84,643 $ 89,389 Weighted-average basic shares outstanding 119,843 120,014 120,206 Diluted earnings per share $ 0.65 $ 0.71 $ 0.74 ________________________ (1) Represents cash dividends paid to holders of unvested restricted stock, net of estimated forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

Stock Based Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	STOCK-BASED COMPENSATION The Company’s 2003 Stock Incentive Plan as amended and restated, or the 2003 Plan, permits stock-based compensation awards to officers, directors, key employees and consultants. As of March 31, 2017 , the 2003 Plan authorized grants of stock‑based compensation instruments to purchase or issue up to 19,686,565 shares of Company common stock, subject to adjustments provided by the 2003 Plan. As of March 31, 2017 , there were 12,148,677 shares available for grant under the 2003 Plan. Restricted Stock Restricted stock amortization totaled $6.5 million , $6.1 million , and $5.0 million for the three months ended March 31, 2017 , December 31, 2016 and March 31, 2016 . 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, 2017 totaled $52.8 million . Time-Based Restricted Stock Awards At March 31, 2017 , there were 1,537,717 shares of unvested TRSAs outstanding. The TRSAs generally vest 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, 2017 , there were 239,025 units of unvested PRSUs outstanding. 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 the 2003 Plan until they vest. PRSUs are granted and initially expensed based on a target number. The number of awards 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. In the case where the performance target for the PRSU’s 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. 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.

Recently Issued Accounting Stan

Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2017
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	RECENTLY ISSUED ACCOUNTING STANDARDS In May 2014, the FASB issued ASU 2014-09, " Revenue Recognition (Topic 606): Revenue from Contracts with Customers." ASU 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective. The standard permits the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU 2014-09 to annual and interim periods beginning after December 15, 2017, while earlier application is permitted only for annual and interim periods beginning after December 31, 2016. The Company has completed the assessment phase of implementing this new standard. In the assessment phase, the Company determined which revenue streams are within the scope and those that are excluded from the scope of the new standard. Substantially all of the Company's revenues are excluded from the scope of the new standard. For the revenue streams determined to be within the scope of the new standard, the Company examined a sample of customer contracts to determine the appropriate accounting for those contracts under the new standard. The Company is currently evaluating the need for any accounting or operational changes related to implementing the requirements of the new standard. The Company will use the modified retrospective transition method and does not expect the provisions of ASU 2014-09 to have a material impact on its consolidated financial position or results of operations. The Company will adopt this standard effective January 1, 2018. In January 2016, the FASB issued ASU 2016-01, " Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ," which will significantly change the income statement impact of equity investments and the recognition of changes in fair value of financial liabilities when the fair value option is elected. For equity investments with readily determinable fair values, entities must measure these investments at fair value and recognize changes in fair value in net income. For equity investments without readily determinable fair values, entities have the option to either measure these investments at fair value or at cost, adjusted for changes in observable prices, minus impairment. Changes in measurement under either alternative must be recognized in net income. ASU 2016-01 will be effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted only for the provisions related to the recognition of changes in fair value of financial liabilities, which does not apply to the Company. The Company does not expect the provisions of ASU 2016-01 to have a material impact on its consolidated financial position or results of operations. In February 2016, the FASB issued ASU 2016-02, " Leases (Topic 842) ," which, among other things, requires lessees to recognize most leases on-balance sheet, which will result in an increase in their reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. ASU 2016-02 supersedes Topic 840, Leases . ASU 2016-02 is effective for annual and interim periods in fiscal years beginning after December 15, 2018 and mandates a modified retrospective transition method for all entities. The Company is evaluating the effect that ASU 2016-02 will have on its financial statements and related disclosures. In June 2016, the FASB issued ASU 2016-13, " Measurement of Credit Losses on Financial Instruments," which significantly changes the way entities recognize impairment of many financial assets. Currently, the impairment model is based on incurred losses, and investments are recognized as impaired when there is no longer an assumption that future cash flows will be collected in full under the originally contracted terms. Under the current expected credit loss (CECL) model, the new standard requires immediate recognition of estimated credit losses expected to occur over the remaining life of the asset. The Company is reviewing software options to assist in meeting the requirements of ASU-2016-13. The Company is developing an implementation plan and is planning to engage a third-party vendor and commence early-stage model development in 2017. ASU 2016-13 is effective for interim and annual periods in fiscal years beginning after December 15, 2019. The Company is evaluating the effect that ASU 2016-13 will have on its consolidated financial position or results of operations. In August 2016, the FASB issued ASU 2016-15, " Classification of Certain Cash Receipts and Cash Payments," which addressed eight issues related to the statement of cash flows, including proceeds from the settlement of BOLI policies. ASU 2016-15 is effective for interim and annual periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. If an entity early adopts ASU 2016-15 in an interim period, adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. An entity that elects early adoption must adopt all of the amendment in the same period. Entities should apply ASU 2016-15 using a retrospective transition method to each period presented. If it is impracticable for an entity to apply ASU 2016-15 retrospectively for some of the issues, it may apply the amendments for those issues prospectively as of the earliest date practicable. ASU 2016-15 will result in some changes in classification in the consolidated statements of cash flows, which the Company does not expect will be significant, and will not have any impact on its consolidated financial position or results of operations. In October 2016, the FASB issued ASU 2016-16, " Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory," which requires entities to recognize at the transaction date the income tax consequences of intercompany asset transfers other than inventory. ASU 2016-16 is effective for interim and annual periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, but only at the beginning of an annual period for which no financial statements (interim or annual) have already been issued or made available for issuance. The Company is evaluating the effect that ASU 2016-16 will have on its financial statements and related disclosures. In January 2017, the FASB issued ASU 2017-01, " Business Combinations (Topic 805): Clarifying the Definition of a Business ," which provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses. ASU 2017-01 is effective for annual periods in fiscal years beginning after December 15, 2018 and interim periods in fiscal years beginning after December 15, 2019. The Company does not expect ASU 2017-01 to have a material impact on its financial condition or results of operations. In January 2017, the FASB issued ASU 2017-04, " Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which intends to simplify goodwill impairment testing by eliminating the second step of the analysis under which the implied fair value of goodwill is determined as if the reporting unit were being acquired in a business combination. ASU 2017-04 instead requires entities to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for any amount by which the carrying amount exceeds the reporting unit's fair value, to the extent that the loss recognized does not exceed the amount of goodwill allocated to that reporting unit. ASU 2017-04 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2017-04 to have a material impact on its financial condition or results of operations.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS CU Bancorp Merger Announcement On April 6, 2017 , PacWest announced the signing of a definitive agreement and plan of merger (the "Agreement") whereby PacWest will acquire CU Bancorp in a transaction valued at approximately $705 million . CU Bancorp, headquartered in Los Angeles, California, is the parent of California United Bank, a California state-chartered non-member bank, with approximately $3.0 billion in assets and nine branches located in Los Angeles, Orange, Ventura, and San Bernardino counties at December 31, 2016 . In connection with the transaction, California United Bank will be merged into Pacific Western Bank, the principal operating subsidiary of PacWest Bancorp. The transaction, which was approved by the PacWest and CU Bancorp boards of directors, is expected to close in the fourth quarter of 2017 and is subject to customary closing conditions, including obtaining approval by CU Bancorp’s shareholders and bank regulatory authorities. As of December 31, 2016 , on a pro forma consolidated basis, the combined company would have approximately $25.0 billion in assets and 87 branches, prior to contemplated consolidations. Under terms of the Agreement, CU Bancorp shareholders will receive 0.5308 shares of PacWest common stock and $12.00 in cash for each share of CU Bancorp. Based on PacWest’s April 5, 2017 closing price of $51.72 , the total value of the merger consideration is $39.45 per CU Bancorp share. Common Stock Dividends On May 1, 2017 , the Company announced that the Board of Directors had declared a quarterly cash dividend of $0.50 per common share. The cash dividend is payable on May 31, 2017 to stockholders of record at the close of business on May 22, 2017 . We have evaluated events that have occurred subsequent to March 31, 2017 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, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Recently Issued Accounting Standards	Accounting Standard Adopted in 2017 Effective January 1, 2017, the Company adopted ASU 2016-09, " Improvements to Employee Share-Based Accounting ." ASU 2016-09 changed aspects of the accounting for share-based payment award transactions, including: (1) accounting for income taxes; (2) classification of excess tax benefits on the statement of cash flows; (3) forfeitures; (4) minimum statutory tax withholding requirements; and (5) classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes. The recognition of excess tax benefits and tax deficiencies in the income statement was adopted prospectively. An income tax benefit of $1.1 million was recognized during the three months ended March 31, 2017 as a result of the adoption of ASU 2016-09. We expect the requirements of ASU 2016-09 to result in fluctuations in our effective tax rate from period to period based upon the timing of share-based award vestings. In connection with the adoption of ASU 2016-09, we elected to recognize forfeitures on stock-based compensation awards when they occur, instead of estimating forfeitures at the grant date of the awards and throughout the vesting period. The modified retrospective application of this change in accounting principle resulted in a cumulative adjustment charge to retained earnings of $420,000 , net of income taxes. We elected to present the classification of excess tax benefits on the statement of cash flows using a prospective transition method and the prior period has not been adjusted. RECENTLY ISSUED ACCOUNTING STANDARDS In May 2014, the FASB issued ASU 2014-09, " Revenue Recognition (Topic 606): Revenue from Contracts with Customers." ASU 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective. The standard permits the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU 2014-09 to annual and interim periods beginning after December 15, 2017, while earlier application is permitted only for annual and interim periods beginning after December 31, 2016. The Company has completed the assessment phase of implementing this new standard. In the assessment phase, the Company determined which revenue streams are within the scope and those that are excluded from the scope of the new standard. Substantially all of the Company's revenues are excluded from the scope of the new standard. For the revenue streams determined to be within the scope of the new standard, the Company examined a sample of customer contracts to determine the appropriate accounting for those contracts under the new standard. The Company is currently evaluating the need for any accounting or operational changes related to implementing the requirements of the new standard. The Company will use the modified retrospective transition method and does not expect the provisions of ASU 2014-09 to have a material impact on its consolidated financial position or results of operations. The Company will adopt this standard effective January 1, 2018. In January 2016, the FASB issued ASU 2016-01, " Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ," which will significantly change the income statement impact of equity investments and the recognition of changes in fair value of financial liabilities when the fair value option is elected. For equity investments with readily determinable fair values, entities must measure these investments at fair value and recognize changes in fair value in net income. For equity investments without readily determinable fair values, entities have the option to either measure these investments at fair value or at cost, adjusted for changes in observable prices, minus impairment. Changes in measurement under either alternative must be recognized in net income. ASU 2016-01 will be effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted only for the provisions related to the recognition of changes in fair value of financial liabilities, which does not apply to the Company. The Company does not expect the provisions of ASU 2016-01 to have a material impact on its consolidated financial position or results of operations. In February 2016, the FASB issued ASU 2016-02, " Leases (Topic 842) ," which, among other things, requires lessees to recognize most leases on-balance sheet, which will result in an increase in their reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. ASU 2016-02 supersedes Topic 840, Leases . ASU 2016-02 is effective for annual and interim periods in fiscal years beginning after December 15, 2018 and mandates a modified retrospective transition method for all entities. The Company is evaluating the effect that ASU 2016-02 will have on its financial statements and related disclosures. In June 2016, the FASB issued ASU 2016-13, " Measurement of Credit Losses on Financial Instruments," which significantly changes the way entities recognize impairment of many financial assets. Currently, the impairment model is based on incurred losses, and investments are recognized as impaired when there is no longer an assumption that future cash flows will be collected in full under the originally contracted terms. Under the current expected credit loss (CECL) model, the new standard requires immediate recognition of estimated credit losses expected to occur over the remaining life of the asset. The Company is reviewing software options to assist in meeting the requirements of ASU-2016-13. The Company is developing an implementation plan and is planning to engage a third-party vendor and commence early-stage model development in 2017. ASU 2016-13 is effective for interim and annual periods in fiscal years beginning after December 15, 2019. The Company is evaluating the effect that ASU 2016-13 will have on its consolidated financial position or results of operations. In August 2016, the FASB issued ASU 2016-15, " Classification of Certain Cash Receipts and Cash Payments," which addressed eight issues related to the statement of cash flows, including proceeds from the settlement of BOLI policies. ASU 2016-15 is effective for interim and annual periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. If an entity early adopts ASU 2016-15 in an interim period, adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. An entity that elects early adoption must adopt all of the amendment in the same period. Entities should apply ASU 2016-15 using a retrospective transition method to each period presented. If it is impracticable for an entity to apply ASU 2016-15 retrospectively for some of the issues, it may apply the amendments for those issues prospectively as of the earliest date practicable. ASU 2016-15 will result in some changes in classification in the consolidated statements of cash flows, which the Company does not expect will be significant, and will not have any impact on its consolidated financial position or results of operations. In October 2016, the FASB issued ASU 2016-16, " Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory," which requires entities to recognize at the transaction date the income tax consequences of intercompany asset transfers other than inventory. ASU 2016-16 is effective for interim and annual periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, but only at the beginning of an annual period for which no financial statements (interim or annual) have already been issued or made available for issuance. The Company is evaluating the effect that ASU 2016-16 will have on its financial statements and related disclosures. In January 2017, the FASB issued ASU 2017-01, " Business Combinations (Topic 805): Clarifying the Definition of a Business ," which provides a new framework for determining whether transactions should be accounted for as acquisitions of assets or businesses. ASU 2017-01 is effective for annual periods in fiscal years beginning after December 15, 2018 and interim periods in fiscal years beginning after December 15, 2019. The Company does not expect ASU 2017-01 to have a material impact on its financial condition or results of operations. In January 2017, the FASB issued ASU 2017-04, " Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which intends to simplify goodwill impairment testing by eliminating the second step of the analysis under which the implied fair value of goodwill is determined as if the reporting unit were being acquired in a business combination. ASU 2017-04 instead requires entities to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for any amount by which the carrying amount exceeds the reporting unit's fair value, to the extent that the loss recognized does not exceed the amount of goodwill allocated to that reporting unit. ASU 2017-04 must be applied prospectively and is effective for the Company on January 1, 2020. Early adoption is permitted. The Company does not expect ASU 2017-04 to have a material impact on its financial condition 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 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.
Reclassification, Policy	Reclassifications Certain prior period amounts have been reclassified to conform to the current period’s presentation format. Regarding time deposits disclosures, we previously presented the categories as: (1) under $100,000, and (2) $100,000 or more, but now are using the current FDIC insurance limit of $250,000 and presenting the categories as: (1) $250,000 and under, and (2) over $250,000.

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements (Policies)	3 Months Ended
	Mar. 31, 2017
Fair Value Measurements [Abstract]
Fair Value Measurement, Policy [Policy Text Block]	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 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. We use 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.

Goodwill and Other Intangible22

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 2016 (In thousands) Gross Amount of CDI and CRI: Balance, beginning of period $ 64,187 $ 73,702 $ 95,524 Fully amortized portion — (9,515 ) — Reduction due to sale of PWEF leasing unit — — (1,700 ) Balance, end of period 64,187 64,187 93,824 Accumulated Amortization: Balance, beginning of period (27,821 ) (34,160 ) (42,304 ) Amortization (3,064 ) (3,176 ) (4,746 ) Fully amortized portion — 9,515 — Reduction due to sale of PWEF leasing unit — — 1,363 Balance, end of period (30,885 ) (27,821 ) (45,687 ) Net CDI and CRI, end of period $ 33,302 $ 36,366 $ 48,137

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 December 31, 2016 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 $ 471,851 $ 6,088 $ (3,383 ) $ 474,556 $ 499,185 $ 6,222 $ (2,964 ) $ 502,443 Agency CMOs 137,720 1,661 (449 ) 138,932 145,258 1,528 (497 ) 146,289 Private label CMOs 147,818 3,461 (1,879 ) 149,400 122,707 4,199 (1,437 ) 125,469 Municipal securities 1,464,306 22,686 (3,711 ) 1,483,281 1,447,064 15,406 (6,011 ) 1,456,459 Agency commercial MBS 718,483 2,488 (8,900 ) 712,071 555,552 1,798 (9,658 ) 547,692 Corporate debt securities 17,000 1,211 — 18,211 47,100 680 (271 ) 47,509 Collateralized loan obligations 126,306 1,809 (142 ) 127,973 155,440 1,685 (238 ) 156,887 SBA securities 168,084 589 (339 ) 168,334 179,085 510 (750 ) 178,845 Asset-backed and other securities 63,966 460 (192 ) 64,234 62,264 358 (385 ) 62,237 Total $ 3,315,534 $ 40,453 $ (18,995 ) $ 3,336,992 $ 3,213,655 $ 32,386 $ (22,211 ) $ 3,223,830
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, 2017 Less Than 12 Months 12 Months or More Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized Security Type Value Losses Value Losses Value Losses (In thousands) Residential MBS and CMOs: Agency MBS $ 139,928 $ (1,802 ) $ 113,812 $ (1,581 ) $ 253,740 $ (3,383 ) Agency CMOs 34,796 (312 ) 18,797 (137 ) 53,593 (449 ) Private label CMOs 88,381 (1,548 ) 24,843 (331 ) 113,224 (1,879 ) Municipal securities 334,546 (3,711 ) — — 334,546 (3,711 ) Agency commercial MBS 380,604 (8,900 ) — — 380,604 (8,900 ) Collateralized loan obligations 17,964 (24 ) 17,067 (118 ) 35,031 (142 ) SBA securities 44,618 (103 ) 29,674 (236 ) 74,292 (339 ) Asset-backed and other securities 15,972 (156 ) 6,957 (36 ) 22,929 (192 ) Total $ 1,056,809 $ (16,556 ) $ 211,150 $ (2,439 ) $ 1,267,959 $ (18,995 ) December 31, 2016 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 $ 149,281 $ (1,691 ) $ 122,902 $ (1,273 ) $ 272,183 $ (2,964 ) Agency CMOs 44,111 (416 ) 25,316 (81 ) 69,427 (497 ) Private label CMOs 49,067 (906 ) 30,155 (531 ) 79,222 (1,437 ) Municipal securities 644,424 (6,011 ) — — 644,424 (6,011 ) Agency commercial MBS 349,550 (9,658 ) — — 349,550 (9,658 ) Corporate debt securities 29,829 (271 ) — — 29,829 (271 ) Collateralized loan obligations 12,450 (37 ) 39,231 (201 ) 51,681 (238 ) SBA securities 69,293 (407 ) 39,024 (343 ) 108,317 (750 ) Asset-backed and other securities 18,213 (309 ) 7,851 (76 ) 26,064 (385 ) Total $ 1,366,218 $ (19,706 ) $ 264,479 $ (2,505 ) $ 1,630,697 $ (22,211 )
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, 2017 Amortized Fair Maturity Cost Value (In thousands) Due in one year or less $ 18,084 $ 18,221 Due after one year through five years 235,439 238,871 Due after five years through ten years 879,297 885,026 Due after ten years 2,182,714 2,194,874 Total securities available-for-sale $ 3,315,534 $ 3,336,992
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, 2017 2016 2016 (In thousands) Taxable interest $ 12,166 $ 11,849 $ 11,396 Non-taxable interest 10,381 10,323 10,726 Dividend income 492 1,231 425 Total interest income on investment securities $ 23,039 $ 23,403 $ 22,547

Loans and Leases (Tables)

Loans and Leases (Tables)	3 Months Ended
	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Schedule Of Composition of Loans Portfolio	The following table summarizes the composition of our loan and lease portfolio as of the dates indicated: March 31, 2017 December 31, 2016 Non-PCI Non-PCI Loans PCI Loans PCI and Leases Loans Total and Leases Loans Total (In thousands) Real estate mortgage $ 5,904,995 $ 88,918 $ 5,993,913 $ 5,635,675 $ 92,793 $ 5,728,468 Real estate construction and land 1,123,123 2,326 1,125,449 975,032 2,409 977,441 Commercial 8,115,953 4,863 8,120,816 8,426,236 12,994 8,439,230 Consumer 382,447 246 382,693 375,149 249 375,398 Total gross loans and leases 15,526,518 96,353 15,622,871 15,412,092 108,445 15,520,537 Deferred fees, net (66,164 ) (18 ) (66,182 ) (64,562 ) (21 ) (64,583 ) Total loans and leases, net of deferred fees 15,460,354 96,335 15,556,689 15,347,530 108,424 15,455,954 Allowance for loan and lease losses (149,826 ) (11,481 ) (161,307 ) (143,755 ) (13,483 ) (157,238 ) Total loans and leases, net $ 15,310,528 $ 84,854 $ 15,395,382 $ 15,203,775 $ 94,941 $ 15,298,716
Delinquent loans in loan portfolio	The following tables present an aging analysis of our Non‑PCI loans and leases by portfolio segment and class as of the dates indicated: March 31, 2017 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 9,218 $ 3,975 $ 13,193 $ 4,365,745 $ 4,378,938 Residential 844 1,879 2,723 1,505,308 1,508,031 Total real estate mortgage 10,062 5,854 15,916 5,871,053 5,886,969 Real estate construction and land: Commercial — — — 666,185 666,185 Residential — 362 362 441,689 442,051 Total real estate construction and land — 362 362 1,107,874 1,108,236 Commercial: Cash flow 598 2,915 3,513 3,129,896 3,133,409 Asset-based 500 204 704 2,390,379 2,391,083 Venture capital 14,381 257 14,638 1,920,311 1,934,949 Equipment finance 251 — 251 622,986 623,237 Total commercial 15,730 3,376 19,106 8,063,572 8,082,678 Consumer 77 — 77 382,394 382,471 Total Non-PCI loans and leases $ 25,869 $ 9,592 $ 35,461 $ 15,424,893 $ 15,460,354 December 31, 2016 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 8,590 $ 3,303 $ 11,893 $ 4,341,740 $ 4,353,633 Residential 5,694 1,999 7,693 1,256,630 1,264,323 Total real estate mortgage 14,284 5,302 19,586 5,598,370 5,617,956 Real estate construction and land: Commercial — — — 578,838 578,838 Residential 364 — 364 383,637 384,001 Total real estate construction and land 364 — 364 962,475 962,839 Commercial: Cash flow 191 1,821 2,012 3,105,380 3,107,392 Asset-based 1,500 2 1,502 2,607,543 2,609,045 Venture capital 13,589 5,769 19,358 1,963,798 1,983,156 Equipment finance 1,417 3,051 4,468 687,499 691,967 Total commercial 16,697 10,643 27,340 8,364,220 8,391,560 Consumer 224 — 224 374,951 375,175 Total Non-PCI loans and leases $ 31,569 $ 15,945 $ 47,514 $ 15,300,016 $ 15,347,530
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables	The following table presents the composition of our impaired loans and leases as of the dates indicated: March 31, 2017 December 31, 2016 Performing Total Performing Total Nonaccrual Troubled Impaired Nonaccrual Troubled Impaired Loans Debt Loans Loans Debt Loans and Restructured and and Restructured and Leases Loans Leases Leases Loans Leases (In thousands) Real estate mortgage $ 72,042 $ 47,119 $ 119,161 $ 69,335 $ 54,750 $ 124,085 Real estate construction and land 362 6,321 6,683 364 6,893 7,257 Commercial 100,453 2,920 103,373 100,561 3,157 103,718 Consumer 173 141 314 339 152 491 Total $ 173,030 $ 56,501 $ 229,531 $ 170,599 $ 64,952 $ 235,551 The following table presents our nonaccrual and performing Non‑PCI loans and leases by portfolio segment and class as of the dates indicated: March 31, 2017 December 31, 2016 Nonaccrual Performing Total Nonaccrual Performing Total (In thousands) Real estate mortgage: Commercial $ 66,216 $ 4,312,722 $ 4,378,938 $ 62,454 $ 4,291,179 $ 4,353,633 Residential 5,826 1,502,205 1,508,031 6,881 1,257,442 1,264,323 Total real estate mortgage 72,042 5,814,927 5,886,969 69,335 5,548,621 5,617,956 Real estate construction and land: Commercial — 666,185 666,185 — 578,838 578,838 Residential 362 441,689 442,051 364 383,637 384,001 Total real estate construction and land 362 1,107,874 1,108,236 364 962,475 962,839 Commercial: Cash flow 53,611 3,079,798 3,133,409 53,908 3,053,484 3,107,392 Asset-based 1,165 2,389,918 2,391,083 2,118 2,606,927 2,609,045 Venture capital 15,289 1,919,660 1,934,949 11,687 1,971,469 1,983,156 Equipment finance 30,388 592,849 623,237 32,848 659,119 691,967 Total commercial 100,453 7,982,225 8,082,678 100,561 8,290,999 8,391,560 Consumer 173 382,298 382,471 339 374,836 375,175 Total Non-PCI loans and leases $ 173,030 $ 15,287,324 $ 15,460,354 $ 170,599 $ 15,176,931 $ 15,347,530
CV of Loans Held for Investment by class by performing and nonperforming	The following table presents the credit risk rating categories for Non‑PCI loans and leases by portfolio segment and class as of the dates indicated. Nonclassified loans and leases are those with a credit risk rating of either pass or special mention, while classified loans and leases are those with a credit risk rating of either substandard or doubtful. March 31, 2017 December 31, 2016 Classified Nonclassified Total Classified Nonclassified Total (In thousands) Real estate mortgage: Commercial $ 100,202 $ 4,278,736 $ 4,378,938 $ 99,641 $ 4,253,992 $ 4,353,633 Residential 9,680 1,498,351 1,508,031 17,540 1,246,783 1,264,323 Total real estate mortgage 109,882 5,777,087 5,886,969 117,181 5,500,775 5,617,956 Real estate construction and land: Commercial 403 665,782 666,185 409 578,429 578,838 Residential 362 441,689 442,051 364 383,637 384,001 Total real estate construction and land 765 1,107,471 1,108,236 773 962,066 962,839 Commercial: Cash flow 175,511 2,957,898 3,133,409 177,661 2,929,731 3,107,392 Asset-based 32,285 2,358,798 2,391,083 28,112 2,580,933 2,609,045 Venture capital 75,222 1,859,727 1,934,949 52,646 1,930,510 1,983,156 Equipment finance 30,388 592,849 623,237 32,848 659,119 691,967 Total commercial 313,406 7,769,272 8,082,678 291,267 8,100,293 8,391,560 Consumer 346 382,125 382,471 424 374,751 375,175 Total Non-PCI loans and leases $ 424,399 $ 15,035,955 $ 15,460,354 $ 409,645 $ 14,937,885 $ 15,347,530
Troubled Debt Restructurings on Financing Receivables	The following table presents new troubled debt restructurings of Non-PCI loans for the periods indicated: Three Months Ended March 31, 2017 2016 Pre- Post- Pre- Post- Modification Modification Modification Modification Outstanding Outstanding Outstanding Outstanding Number Recorded Recorded Number Recorded Recorded Troubled Debt Restructurings of Loans Investment Investment of Loans Investment Investment (Dollars in thousands) Real estate mortgage: Commercial 1 $ 64 $ — 4 $ 3,140 $ 3,140 Residential 2 42 42 1 165 165 Commercial: Cash flow 2 106 106 4 257 257 Asset-based 2 613 613 2 629 629 Venture capital 3 13,065 13,065 — — — Equipment finance — — — 2 2,660 2,660 Consumer 1 97 97 1 60 60 Total 11 $ 13,987 $ 13,923 14 $ 6,911 $ 6,911
Subsequently Defaulted Trouble Debt Restructurings	The following table presents troubled debt restructurings that subsequently defaulted for the periods indicated: Three Months Ended March 31, 2017 2016 Troubled Debt Restructurings Number Recorded Number Recorded That Subsequently Defaulted of Loans Investment (1) of Loans Investment (1) (Dollars in thousands) Real estate mortgage: Commercial — $ — 1 $ 230 Consumer 1 28 — — Total 1 $ 28 (2) 1 $ 230 (3) _________________________ (1) The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. For example, for the 12-month period ended March 31, 2017 , the population of defaulted restructured loans includes only those loans restructured after March 31, 2016 . The table excludes defaulted troubled restructurings in those classes for which the recorded investment was zero at the end of the period. (2) Represents the balance at March 31, 2017 , and there were no charge-offs. (3) Represents the balance at March 31, 2016 , and there were no charge-offs.
Allowance for Credit Losses on Financing Receivables	The following tables present a summary of the activity in the allowance for loan and lease losses on Non‑PCI loans and leases by portfolio segment and PCI loans for the periods indicated: Three Months Ended March 31, 2017 Real Estate Real Estate Construction Total Total Mortgage and Land Commercial Consumer Non-PCI PCI Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period $ 37,765 $ 10,045 $ 93,853 $ 2,092 $ 143,755 $ 13,483 $ 157,238 Charge-offs (1,544 ) — (19,285 ) (99 ) (20,928 ) (2,230 ) (23,158 ) Recoveries 230 8 2,448 53 2,739 — 2,739 Provision (negative provision) (1,083 ) 423 25,118 (198 ) 24,260 228 24,488 Balance, end of period $ 35,368 $ 10,476 $ 102,134 $ 1,848 $ 149,826 $ 11,481 $ 161,307 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 1,070 $ — $ 12,267 $ 90 $ 13,427 Collectively evaluated for impairment $ 34,298 $ 10,476 $ 89,867 $ 1,758 $ 136,399 Acquired loans with deteriorated credit quality $ 11,481 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 118,275 $ 6,683 $ 103,221 $ 281 $ 228,460 Collectively evaluated for impairment 5,768,694 1,101,553 7,979,457 382,190 15,231,894 Acquired loans with deteriorated credit quality $ 96,335 Ending balance $ 5,886,969 $ 1,108,236 $ 8,082,678 $ 382,471 $ 15,460,354 $ 96,335 $ 15,556,689 Three Months Ended March 31, 2016 Real Estate Real Estate Construction Total Total Mortgage and Land Commercial Consumer Non-PCI PCI Total (In thousands) Allowance for Loan and Lease Losses: Balance, beginning of period $ 36,654 $ 7,137 $ 61,082 $ 661 $ 105,534 $ 9,577 $ 115,111 Charge-offs (737 ) — (4,045 ) (591 ) (5,373 ) (163 ) (5,536 ) Recoveries 999 152 314 16 1,481 — 1,481 Provision (negative provision) (7,817 ) (413 ) 26,606 789 19,165 140 19,305 Balance, end of period $ 29,099 $ 6,876 $ 83,957 $ 875 $ 120,807 $ 9,554 $ 130,361 Ending Allowance by Impairment Methodology: Individually evaluated for impairment $ 1,954 $ 21 $ 27,902 $ 163 $ 30,040 Collectively evaluated for impairment $ 27,145 $ 6,855 $ 56,055 $ 712 $ 90,767 Acquired loans with deteriorated credit quality $ 9,554 Ending Loans and Leases by Impairment Methodology: Individually evaluated for impairment $ 90,830 $ 7,945 $ 96,614 $ 1,102 $ 196,491 Collectively evaluated for impairment 5,539,467 567,528 7,893,955 109,520 14,110,470 Acquired loans with deteriorated credit quality $ 176,556 Ending balance $ 5,630,297 $ 575,473 $ 7,990,569 $ 110,622 $ 14,306,961 $ 176,556 $ 14,483,517
Non Purchased Credit Impaired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivables, Average Balances And Interest Income Recognized	The following tables present information regarding our Non‑PCI impaired loans and leases by portfolio segment and class as of and for the dates indicated: March 31, 2017 December 31, 2016 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 $ 14,350 $ 15,257 $ 633 $ 63,325 $ 65,031 $ 6,266 Residential 3,502 3,570 437 8,424 8,612 585 Real estate construction and land: Residential — — — 213 213 — Commercial: Cash flow 50,690 65,605 8,901 51,272 52,910 12,474 Asset-based 1,430 1,423 144 4,395 4,861 2,144 Venture capital 12,206 12,254 3,222 5,821 5,880 3,294 Equipment finance — — — 1,524 4,636 — Consumer 187 191 90 270 280 170 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 96,032 $ 105,317 $ 44,557 $ 51,402 Residential 5,277 6,408 7,779 8,940 Real estate construction and land: Commercial 6,111 6,111 6,680 6,680 Residential 572 576 364 366 Commercial: Cash flow 2,925 5,718 2,852 5,939 Asset-based 2,651 3,782 664 1,652 Venture capital 3,083 9,907 5,866 8,939 Equipment finance 30,388 51,682 31,324 53,319 Consumer 127 198 221 292 Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 119,161 $ 130,552 $ 1,070 $ 124,085 $ 133,985 $ 6,851 Real estate construction and land 6,683 6,687 — 7,257 7,259 — Commercial 103,373 150,371 12,267 103,718 138,136 17,912 Consumer 314 389 90 491 572 170 Total $ 229,531 $ 287,999 $ 13,427 $ 235,551 $ 279,952 $ 24,933 Three Months Ended March 31, 2017 2016 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 $ 14,350 $ 206 $ 19,471 $ 243 Residential 3,501 12 4,198 24 Real estate construction and land: Residential — — 743 4 Commercial: Cash flow 43,172 — 20,823 12 Asset-based 1,162 15 3,696 27 Venture capital 4,693 — — — Equipment finance — — 49,322 — Consumer 187 — 341 3 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 92,753 $ 560 $ 54,132 $ 217 Residential 5,216 15 5,405 14 Real estate construction and land: Commercial 6,111 67 7,202 62 Residential 572 2 — — Commercial: Cash flow 2,821 5 2,683 1 Asset-based 2,279 25 1,181 15 Venture capital 2,429 — — — Equipment finance 30,388 — — — Consumer 127 2 797 — Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 115,820 $ 793 $ 83,206 $ 498 Real estate construction and land 6,683 69 7,945 66 Commercial 86,944 45 77,705 55 Consumer 314 2 1,138 3 Total $ 209,761 $ 909 $ 169,994 $ 622 _________________________ (1) For Non-PCI loans and leases reported as impaired at March 31, 2017 and 2016 , amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

Foreclosed Assets (Tables)

Foreclosed Assets (Tables)	3 Months Ended
	Mar. 31, 2017
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 2017 2016 (In thousands) Construction and land development $ 11,224 $ 11,224 Multi‑family 601 652 Commercial real estate 78 — Total other real estate owned, net 11,903 11,876 Other foreclosed assets 939 1,100 Total foreclosed assets, net $ 12,842 $ 12,976
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, 2016 $ 12,976 Foreclosures 78 Reductions related to sales (212 ) Balance, March 31, 2017 $ 12,842

Borrowings and Subordinated D26

Borrowings and Subordinated Debentures (Tables)	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes our borrowings as of the dates indicated: March 31, 2017 December 31, 2016 Weighted Weighted Average Average Amount Rate Amount Rate (Dollars in thousands) Non‑recourse debt $ 609 6.58 % $ 812 6.41 % FHLB secured advances 290,000 0.80 % 735,000 0.59 % FHLB unsecured overnight advance 130,000 0.81 % 130,000 0.55 % American Financial Exchange borrowings 40,000 1.05 % 40,000 0.81 % Total borrowings $ 460,609 $ 905,812
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, 2017 December 31, 2016 Date Maturity Rate Index Series Amount Rate Amount Rate Issued Date (Quarterly Reset) (Dollars in thousands) Trust V $ 10,310 4.25 % $ 10,310 4.09 % 8/15/2003 9/17/2033 3 month LIBOR + 3.10 Trust VI 10,310 4.18 % 10,310 4.01 % 9/3/2003 9/15/2033 3 month LIBOR + 3.05 Trust CII 5,155 4.10 % 5,155 3.95 % 9/17/2003 9/17/2033 3 month LIBOR + 2.95 Trust VII 61,856 3.79 % 61,856 3.64 % 2/5/2004 4/23/2034 3 month LIBOR + 2.75 Trust CIII 20,619 2.82 % 20,619 2.65 % 8/15/2005 9/15/2035 3 month LIBOR + 1.69 Trust FCCI 16,495 2.73 % 16,495 2.56 % 1/25/2007 3/15/2037 3 month LIBOR + 1.60 Trust FCBI 10,310 2.68 % 10,310 2.51 % 9/30/2005 12/15/2035 3 month LIBOR + 1.55 Trust CS 2005-1 82,475 3.08 % 82,475 2.91 % 11/21/2005 12/15/2035 3 month LIBOR + 1.95 Trust CS 2005-2 128,866 2.99 % 128,866 2.84 % 12/14/2005 1/30/2036 3 month LIBOR + 1.95 Trust CS 2006-1 51,545 2.99 % 51,545 2.84 % 2/22/2006 4/30/2036 3 month LIBOR + 1.95 Trust CS 2006-2 51,550 2.99 % 51,550 2.84 % 9/27/2006 10/30/2036 3 month LIBOR + 1.95 Trust CS 2006-3 (1) 27,572 1.72 % 27,185 1.74 % 9/29/2006 10/30/2036 3 month EURIBOR + 2.05 Trust CS 2006-4 16,470 2.99 % 16,470 2.84 % 12/5/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2006-5 6,650 2.99 % 6,650 2.84 % 12/19/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2007-2 39,177 2.99 % 39,177 2.84 % 6/13/2007 7/30/2037 3 month LIBOR + 1.95 Gross subordinated debentures 539,360 538,973 Unamortized discount (2) (96,844 ) (98,229 ) Net subordinated debentures $ 442,516 $ 440,744 ___________________ (1) Denomination is in Euros with a value of €25.8 million . (2) Amount represents the fair value adjustment on subordinated debentures assumed in acquisitions.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments Disclosure	The following table presents a summary of the financial instruments described above as of the dates indicated: March 31, December 31, 2017 2016 (In thousands) Loan commitments to extend credit $ 4,497,373 $ 4,166,703 Standby letters of credit 221,718 211,398 $ 4,719,091 $ 4,378,101

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 Measured on a Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Residential MBS and CMOs: Agency MBS $ 474,556 $ — $ 474,556 $ — Agency CMOs 138,932 — 138,932 — Private label CMOs 149,400 — 104,119 45,281 Municipal securities 1,483,281 — 1,483,281 — Agency commercial MBS 712,071 — 712,071 — Corporate debt securities 18,211 — 18,211 — Collateralized loan obligations 127,973 — 127,973 — SBA securities 168,334 — 168,334 — Asset-backed and other securities 64,234 1,960 54,398 7,876 Total securities available-for-sale 3,336,992 1,960 3,281,875 53,157 Derivative assets 427 — 427 — Equity warrants 5,368 — — 5,368 Total recurring assets $ 3,342,787 $ 1,960 $ 3,282,302 $ 58,525 Derivative liabilities $ 3,295 $ — $ 3,295 $ — Fair Value Measurements as of December 31, 2016 Measured on a Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Residential MBS and CMOs: Agency MBS $ 502,443 $ — $ 502,443 $ — Agency CMOs 146,289 — 146,289 — Private label CMOs 125,469 — 68,567 56,902 Municipal securities 1,456,459 — 1,456,459 — Agency commercial MBS 547,692 — 547,692 — Corporate debt securities 47,509 — 47,509 — Collateralized loan obligations 156,887 — 156,887 — SBA securities 178,845 — 178,845 — Asset-backed and other securities 62,237 2,080 51,784 8,373 Total securities available-for-sale 3,223,830 2,080 3,156,475 65,275 Derivative assets 694 — 694 — Equity warrants 5,497 — — 5,497 Total recurring assets $ 3,230,021 $ 2,080 $ 3,157,169 $ 70,772 Derivative liabilities $ 3,285 $ — $ 3,285 $ —
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, 2017 Private Label CMOs Asset-Backed Securities (1) Weighted Weighted Range Average Range Average Unobservable Inputs of Inputs Input of Inputs Input Voluntary annual prepayment speeds 2.4% - 32.6% 8.8% 5% - 5% 5.0% Annual default rates 0% - 14.5% 2.3% 1% - 1% 1.0% Loss severity rates 0% - 92.9% 41.0% 15% - 15% 15.0% Discount rates 0% - 10.3% 4.4% 3.5% - 3.5% 3.5%
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, 2017 Equity Warrants Weighted Average Unobservable Inputs Input Volatility 17.8% Risk-free interest rate 1.7% Remaining life assumption (in years) 3.8
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, 2016 $ 56,902 $ 8,373 $ 5,497 Total included in earnings 1,063 25 155 Total included in other comprehensive income (534 ) (42 ) — Sales (4,732 ) — (518 ) Issuances — — 234 Net settlements (7,418 ) (480 ) — Balance, March 31, 2017 $ 45,281 $ 7,876 $ 5,368
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, 2017 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 73,047 $ — $ — $ 73,047 Fair Value Measurement as of December 31, 2016 Measured on a Non‑Recurring Basis Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 149,749 $ — $ 1,661 $ 148,088 OREO 11,224 — 11,224 — Investments carried at cost 242 — — 242 Total non-recurring $ 161,215 $ — $ 12,885 $ 148,330
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 2017 2016 (In thousands) Impaired Non‑PCI loans $ 13,617 $ 12,909
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, 2017 Valuation Unobservable Weighted Asset Fair Value Technique Inputs Range Average (In thousands) Impaired Non-PCI loans $ 65,114 Discounted cash flows Discount rates 0% - 8.75% 6.60% 7,933 Third party appraisals No discounts Total non-recurring Level 3 $ 73,047
Fair Value, by Balance Sheet Grouping	The following tables present a summary of the carrying values and estimated fair values of certain financial instruments as of the dates indicated: March 31, 2017 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 184,608 $ 184,608 $ 184,608 $ — $ — Interest‑earning deposits in financial institutions 111,892 111,892 111,892 — — Securities available‑for‑sale 3,336,992 3,336,992 1,960 3,281,875 53,157 Investment in FHLB stock 17,901 17,901 — 17,901 — Investments carried at cost 1,175 12,412 — — 12,412 Loans and leases, net 15,395,382 15,526,920 — — 15,526,920 Derivative assets 427 427 — 427 — Equity warrants 5,368 5,368 — — 5,368 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 13,923,143 13,923,143 — 13,923,143 — Time deposits 2,407,865 2,399,793 — 2,399,793 — Borrowings 460,609 460,627 456,000 4,627 — Subordinated debentures 442,516 425,914 — 425,914 — Derivative liabilities 3,295 3,295 — 3,295 — December 31, 2016 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 337,965 $ 337,965 $ 337,965 $ — $ — Interest‑earning deposits in financial institutions 81,705 81,705 81,705 — — Securities available‑for‑sale 3,223,830 3,223,830 2,080 3,156,475 65,275 Investment in FHLB stock 21,870 21,870 — 21,870 — Investments carried at cost 1,416 3,843 — — 3,843 Loans and leases, net 15,298,716 15,494,808 — 1,661 15,493,147 Derivative assets 694 694 — 694 — Equity warrants 5,497 5,497 — — 5,497 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 13,698,321 13,698,321 — 13,698,321 — Time deposits 2,172,290 2,166,187 — 2,166,187 — Borrowings 905,812 905,838 591,000 314,838 — Subordinated debentures 440,744 424,507 — 424,507 — Derivative liabilities 3,285 3,285 — 3,285 —

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 2016 (Dollars in thousands, except per share data) Basic Earnings Per Share: Net earnings $ 78,668 $ 85,647 $ 90,456 Less: Earnings allocated to unvested restricted stock (1) (999 ) (1,004 ) (1,067 ) Net earnings allocated to common shares $ 77,669 $ 84,643 $ 89,389 Weighted-average basic shares and unvested restricted stock outstanding 121,346 121,464 121,598 Less: Weighted-average unvested restricted stock outstanding (1,503 ) (1,450 ) (1,392 ) Weighted-average basic shares outstanding 119,843 120,014 120,206 Basic earnings per share $ 0.65 $ 0.71 $ 0.74 Diluted Earnings Per Share: Net earnings allocated to common shares $ 77,669 $ 84,643 $ 89,389 Weighted-average basic shares outstanding 119,843 120,014 120,206 Diluted earnings per share $ 0.65 $ 0.71 $ 0.74 ________________________ (1) Represents cash dividends paid to holders of unvested restricted stock, net of estimated forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

Organization (Details Textual)

Organization (Details Textual)	3 Months Ended
	Mar. 31, 2017USD ($)bank_branchacquisition
Business Acquisition [Line Items]
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Change of Income Taxes | $	$ 1,100,000
General Introduction [Abstract]
Number of businesses acquired | acquisition	28
CALIFORNIA
General Introduction [Abstract]
Retail branch locations | bank_branch	74
NORTH CAROLINA
General Introduction [Abstract]
Retail branch locations | bank_branch	1
Retained Earnings
Business Acquisition [Line Items]
Cumulative effect of change in accounting principle | $	$ 420,000

Goodwill and Other Intangible31

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Finite-lived Intangible Assets [Roll Forward]
CDI and CRI Balance, beginning of period	$ 64,187	$ 73,702	$ 95,524
Fully amortized portion	0	(9,515)	0
Reduction due to sale of PWEF leasing unit	0	0	1,363
Amortization	(3,064)	(3,176)	(4,746)
CDI and CRI Balance, end of period	64,187	64,187	93,824
Accumulated Amortization, beginning of period	(27,821)	(34,160)	(42,304)
Accumulated Amortization, end of period	(30,885)	(27,821)	(45,687)
Net CDI and CRI, end of period	33,302	36,366	48,137
CDI and CRI
Finite-lived Intangible Assets [Roll Forward]
Fully amortized portion	0	(9,515)	0
Reduction due to sale of PWEF leasing unit	$ 0	$ 0	$ (1,700)

Goodwill and Other Intangible32

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	5 years 2 months 5 days
Intangible asset amortization	$ 3,064	$ 3,176	$ 4,746
Aggregate amortization expense 2018	8,800
Aggregate amortization expense 2019	6,700
Aggregate amortization expense 2020	4,700
Aggregate amortization expense 2021	3,000
Aggregate amortization expense 2022	$ 1,700
Scenario, Forecast
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization				$ 11,500

Investment Securities (Details

Investment Securities (Details - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	$ 3,315,534	$ 3,213,655
Available-for-sale Securities, Gross Unrealized Gain	40,453	32,386
Available-for-sale Securities, Gross Unrealized Loss	(18,995)	(22,211)
Securities available‑for‑sale	3,336,992	3,223,830
Government agency and government-sponsored enterprise pass through securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	471,851	499,185
Available-for-sale Securities, Gross Unrealized Gain	6,088	6,222
Available-for-sale Securities, Gross Unrealized Loss	(3,383)	(2,964)
Securities available‑for‑sale	474,556	502,443
Government agency and government-sponsored enterprise collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	137,720	145,258
Available-for-sale Securities, Gross Unrealized Gain	1,661	1,528
Available-for-sale Securities, Gross Unrealized Loss	(449)	(497)
Securities available‑for‑sale	138,932	146,289
Private label collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	147,818	122,707
Available-for-sale Securities, Gross Unrealized Gain	3,461	4,199
Available-for-sale Securities, Gross Unrealized Loss	(1,879)	(1,437)
Securities available‑for‑sale	149,400	125,469
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	1,464,306	1,447,064
Available-for-sale Securities, Gross Unrealized Gain	22,686	15,406
Available-for-sale Securities, Gross Unrealized Loss	(3,711)	(6,011)
Securities available‑for‑sale	1,483,281	1,456,459
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	718,483	555,552
Available-for-sale Securities, Gross Unrealized Gain	2,488	1,798
Available-for-sale Securities, Gross Unrealized Loss	(8,900)	(9,658)
Securities available‑for‑sale	712,071	547,692
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	17,000	47,100
Available-for-sale Securities, Gross Unrealized Gain	1,211	680
Available-for-sale Securities, Gross Unrealized Loss	0	(271)
Securities available‑for‑sale	18,211	47,509
Collateralized loan obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	126,306	155,440
Available-for-sale Securities, Gross Unrealized Gain	1,809	1,685
Available-for-sale Securities, Gross Unrealized Loss	(142)	(238)
Securities available‑for‑sale	127,973	156,887
SBA asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	168,084	179,085
Available-for-sale Securities, Gross Unrealized Gain	589	510
Available-for-sale Securities, Gross Unrealized Loss	(339)	(750)
Securities available‑for‑sale	168,334	178,845
Asset-backed and other securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	63,966	62,264
Available-for-sale Securities, Gross Unrealized Gain	460	358
Available-for-sale Securities, Gross Unrealized Loss	(192)	(385)
Securities available‑for‑sale	$ 64,234	$ 62,237

Investment Securities (Details

Investment Securities (Details 1) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 1,056,809	$ 1,366,218
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(16,556)	(19,706)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	211,150	264,479
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(2,439)	(2,505)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,267,959	1,630,697
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(18,995)	(22,211)
Government agency and government-sponsored enterprise pass through securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	139,928	149,281
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,802)	(1,691)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	113,812	122,902
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,581)	(1,273)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	253,740	272,183
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(3,383)	(2,964)
Government agency and government-sponsored enterprise collateralized mortgage obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	34,796	44,111
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(312)	(416)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	18,797	25,316
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(137)	(81)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	53,593	69,427
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(449)	(497)
Private label collateralized mortgage obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	88,381	49,067
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,548)	(906)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	24,843	30,155
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(331)	(531)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	113,224	79,222
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,879)	(1,437)
Municipal securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	334,546	644,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(3,711)	(6,011)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	334,546	644,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(3,711)	(6,011)
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	380,604	349,550
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(8,900)	(9,658)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	380,604	349,550
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(8,900)	(9,658)
Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		29,829
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(271)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		29,829
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		(271)
Collateralized loan obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	17,964	12,450
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(24)	(37)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	17,067	39,231
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(118)	(201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	35,031	51,681
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(142)	(238)
SBA asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	44,618	69,293
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(103)	(407)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	29,674	39,024
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(236)	(343)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	74,292	108,317
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(339)	(750)
Asset-backed and other securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,972	18,213
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(156)	(309)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	6,957	7,851
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(36)	(76)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	22,929	26,064
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (192)	$ (385)

Investment Securities (Detail35

Investment Securities (Details 2) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Due in one year or less	$ 18,084
Due after one year through five years	235,439
Due after five years through ten years	879,297
Due after ten years	2,182,714
Total securities available-for-sale	3,315,534	$ 3,213,655
Fair Value
Due in one year or less	18,221
Due after one year through five years	238,871
Due after five years through ten years	885,026
Due after ten years	2,194,874
Total securities available-for-sale	$ 3,336,992	$ 3,223,830

Investment Securities (Detail36

Investment Securities (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Taxable interest	$ 12,166	$ 11,849	$ 11,396
Non-taxable interest	10,381	10,323	10,726
Dividend income	492	1,231	425
Total interest income on investment securities	$ 23,039	$ 23,403	$ 22,547

Investment Securities (Detail37

Investment Securities (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
AFS securities pledged as collateral	$ 424,700,000
Proceeds from sales of securities available-for-sale	42,996,000	$ 343,031,000
Gross realized gains on sale of securities	204,000	8,900,000
Gross realized losses on sale of securities	(303,000)	(800,000)
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities available-for-sale	$ 43,100,000	$ 334,900,000

Loans and Leases (Details)

Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	$ 15,622,871	$ 15,520,537
Deferred fees, net	(66,182)	(64,583)
Loans held for investment, net	15,556,689	15,455,954
Loans and Leases Receivable, Allowance	(161,307)	(157,238)
Total loans and leases, net	15,395,382	15,298,716
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	15,526,518	15,412,092
Deferred fees, net	(66,164)	(64,562)
Loans held for investment, net	15,460,354	15,347,530	$ 14,306,961
Loans and Leases Receivable, Allowance	(149,826)	(143,755)	(120,807)	$ (105,534)
Total loans and leases, net	15,310,528	15,203,775
Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	96,353	108,445
Deferred fees, net	(18)	(21)
Loans held for investment, net	96,335	108,424	176,556
Loans and Leases Receivable, Allowance	(11,481)	(13,483)
Total loans and leases, net	84,854	94,941
NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases, net		15,298,716
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	5,904,995	5,635,675
Loans held for investment, net	5,886,969	5,617,956	5,630,297
Loans and Leases Receivable, Allowance	(35,368)	(37,765)	(29,099)	(36,654)
Real Estate Mortgage | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	88,918	92,793
Real Estate Mortgage | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	5,993,913	5,728,468
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	1,123,123	975,032
Loans held for investment, net	1,108,236	962,839	575,473
Loans and Leases Receivable, Allowance	(10,476)	(10,045)	(6,876)	(7,137)
Real Estate Construction and Land | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	2,326	2,409
Real Estate Construction and Land | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	1,125,449	977,441
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	8,115,953	8,426,236
Loans held for investment, net	8,082,678	8,391,560	7,990,569
Loans and Leases Receivable, Allowance	(102,134)	(93,853)	(83,957)	(61,082)
Commercial | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	4,863	12,994
Commercial | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	8,120,816	8,439,230
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	382,447	375,149
Loans held for investment, net	382,471	375,175	110,622
Loans and Leases Receivable, Allowance	(1,848)	(2,092)	$ (875)	$ (661)
Consumer | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	246	249
Consumer | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	$ 382,693	$ 375,398

Loans and Leases (Details 1)

Loans and Leases (Details 1) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Delinquent loans in loan portfolio
30-89 Days Past Due	$ 4,000	$ 3,000
90 or More Days Past Due	9,600	15,900
Loans held for investment, net	15,556,689	15,455,954
Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	25,869	31,569
90 or More Days Past Due	9,592	15,945
Total Past Due	35,461	47,514
Current	15,424,893	15,300,016
Loans held for investment, net	15,460,354	15,347,530	$ 14,306,961
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	10,062	14,284
90 or More Days Past Due	5,854	5,302
Total Past Due	15,916	19,586
Current	5,871,053	5,598,370
Loans held for investment, net	5,886,969	5,617,956	5,630,297
Real Estate Mortgage | Commercial real estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	9,218	8,590
90 or More Days Past Due	3,975	3,303
Total Past Due	13,193	11,893
Current	4,365,745	4,341,740
Loans held for investment, net	4,378,938	4,353,633
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	844	5,694
90 or More Days Past Due	1,879	1,999
Total Past Due	2,723	7,693
Current	1,505,308	1,256,630
Loans held for investment, net	1,508,031	1,264,323
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	0	364
90 or More Days Past Due	362	0
Total Past Due	362	364
Current	1,107,874	962,475
Loans held for investment, net	1,108,236	962,839	575,473
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	0
90 or More Days Past Due	0	0
Total Past Due	0	0
Current	666,185	578,838
Loans held for investment, net	666,185	578,838
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	0	364
90 or More Days Past Due	362	0
Total Past Due	362	364
Current	441,689	383,637
Loans held for investment, net	442,051	384,001
Commercial | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	15,730	16,697
90 or More Days Past Due	3,376	10,643
Total Past Due	19,106	27,340
Current	8,063,572	8,364,220
Loans held for investment, net	8,082,678	8,391,560	7,990,569
Commercial | Cash Flow | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	598	191
90 or More Days Past Due	2,915	1,821
Total Past Due	3,513	2,012
Current	3,129,896	3,105,380
Loans held for investment, net	3,133,409	3,107,392
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	500	1,500
90 or More Days Past Due	204	2
Total Past Due	704	1,502
Current	2,390,379	2,607,543
Loans held for investment, net	2,391,083	2,609,045
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	14,381	13,589
90 or More Days Past Due	257	5,769
Total Past Due	14,638	19,358
Current	1,920,311	1,963,798
Loans held for investment, net	1,934,949	1,983,156
Commercial | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	251	1,417
90 or More Days Past Due	0	3,051
Total Past Due	251	4,468
Current	622,986	687,499
Loans held for investment, net	623,237	691,967
Consumer | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	77	224
90 or More Days Past Due	0	0
Total Past Due	77	224
Current	382,394	374,951
Loans held for investment, net	$ 382,471	$ 375,175	$ 110,622

Loans and Leases (Details 2)

Loans and Leases (Details 2) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Nonaccrual	$ 173,030	$ 170,599
Loans held for investment	15,556,689	15,455,954
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	173,030	170,599
Loans held for investment	15,460,354	15,347,530	$ 14,306,961
Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	15,287,324	15,176,931
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	72,042	69,335
Loans held for investment	5,886,969	5,617,956	5,630,297
Real Estate Mortgage | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	5,814,927	5,548,621
Real Estate Mortgage | Commercial real estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	66,216	62,454
Loans held for investment	4,378,938	4,353,633
Real Estate Mortgage | Commercial real estate | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	4,312,722	4,291,179
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	5,826	6,881
Loans held for investment	1,508,031	1,264,323
Real Estate Mortgage | Residential Real Estate | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	1,502,205	1,257,442
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	362	364
Loans held for investment	1,108,236	962,839	575,473
Real Estate Construction and Land | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	1,107,874	962,475
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	0	0
Loans held for investment	666,185	578,838
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	666,185	578,838
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	362	364
Loans held for investment	442,051	384,001
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	441,689	383,637
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	100,453	100,561
Loans held for investment	8,082,678	8,391,560	7,990,569
Commercial | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	7,982,225	8,290,999
Commercial | Cash Flow | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	53,611	53,908
Loans held for investment	3,133,409	3,107,392
Commercial | Cash Flow | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	3,079,798	3,053,484
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	1,165	2,118
Loans held for investment	2,391,083	2,609,045
Commercial | Asset Based | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	2,389,918	2,606,927
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	15,289	11,687
Loans held for investment	1,934,949	1,983,156
Commercial | Venture Capital Loans | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	1,919,660	1,971,469
Commercial | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	30,388	32,848
Loans held for investment	623,237	691,967
Commercial | Equipment Finance Commercial Financing Receivable | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	592,849	659,119
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Nonaccrual	173	339
Loans held for investment	382,471	375,175	$ 110,622
Consumer | Performing | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans held for investment	$ 382,298	$ 374,836

Loans and Leases (Details 3)

Loans and Leases (Details 3) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	$ 15,556,689	$ 15,455,954
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	15,460,354	15,347,530	$ 14,306,961
Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	424,399	409,645
Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	15,035,955	14,937,885
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	5,886,969	5,617,956	5,630,297
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	109,882	117,181
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	5,777,087	5,500,775
Real Estate Mortgage | Commercial real estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	4,378,938	4,353,633
Real Estate Mortgage | Commercial real estate | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	100,202	99,641
Real Estate Mortgage | Commercial real estate | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	4,278,736	4,253,992
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	1,508,031	1,264,323
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	9,680	17,540
Real Estate Mortgage | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,498,351	1,246,783
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,108,236	962,839	575,473
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	765	773
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,107,471	962,066
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	666,185	578,838
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	403	409
Real Estate Construction and Land | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	665,782	578,429
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	442,051	384,001
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	362	364
Real Estate Construction and Land | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	441,689	383,637
Commercial | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	8,082,678	8,391,560	7,990,569
Commercial | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	313,406	291,267
Commercial | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	7,769,272	8,100,293
Commercial | Cash Flow | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	3,133,409	3,107,392
Commercial | Cash Flow | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	175,511	177,661
Commercial | Cash Flow | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,957,898	2,929,731
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,391,083	2,609,045
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	32,285	28,112
Commercial | Asset Based | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	2,358,798	2,580,933
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,934,949	1,983,156
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	75,222	52,646
Commercial | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	1,859,727	1,930,510
Commercial | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	623,237	691,967
Commercial | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	30,388	32,848
Commercial | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	592,849	659,119
Consumer | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	382,471	375,175	$ 110,622
Consumer | Non Purchased Credit Impaired Loans and Leases | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	346	424
Consumer | Non Purchased Credit Impaired Loans and Leases | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	$ 382,125	$ 374,751

Loans and Leases (Details 4)

Loans and Leases (Details 4) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	$ 173,030	$ 170,599
Performing Restructured Loans	56,501	64,952
Total Impaired Loans/Leases	229,531	235,551
Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	173,030	170,599
Total Impaired Loans/Leases	229,531	235,551
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	72,042	69,335
Performing Restructured Loans	47,119	54,750
Total Impaired Loans/Leases	119,161	124,085
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/Leases	362	364
Performing Restructured Loans	6,321	6,893
Total Impaired Loans/Leases	6,683	7,257
Commercial | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	100,453	100,561
Performing Restructured Loans	2,920	3,157
Total Impaired Loans/Leases	103,373	103,718
Consumer | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Nonaccrual Loans/Leases	173	339
Performing Restructured Loans	141	152
Total Impaired Loans/Leases	$ 314	$ 491

Loans and Leases (Details 5)

Loans and Leases (Details 5) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Total Impaired Loans/Leases		$ 229,531		$ 235,551
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		13,427		24,933
Total Impaired Loans/Leases		229,531		235,551
Impaired Financing Receivable, Unpaid Principal Balance		287,999		279,952
Impaired Financing Receivable, Average Recorded Investment	[1]	209,761	$ 169,994
Impaired Financing Receivable, Interest Income, Accrual Method		909	622
Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		1,070		6,851
Total Impaired Loans/Leases		119,161		124,085
Impaired Financing Receivable, Unpaid Principal Balance		130,552		133,985
Impaired Financing Receivable, Average Recorded Investment	[1]	115,820	83,206
Impaired Financing Receivable, Interest Income, Accrual Method		793	498
Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		0		0
Total Impaired Loans/Leases		6,683		7,257
Impaired Financing Receivable, Unpaid Principal Balance		6,687		7,259
Impaired Financing Receivable, Average Recorded Investment	[1]	6,683	7,945
Impaired Financing Receivable, Interest Income, Accrual Method		69	66
Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		12,267		17,912
Total Impaired Loans/Leases		103,373		103,718
Impaired Financing Receivable, Unpaid Principal Balance		150,371		138,136
Impaired Financing Receivable, Average Recorded Investment	[1]	86,944	77,705
Impaired Financing Receivable, Interest Income, Accrual Method		45	55
Non Purchased Credit Impaired Loans and Leases | Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		187		270
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		191		280
Impaired Financing Receivable, Related Allowance		90		170
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		127		221
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		198		292
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	187	341
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	3
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	127	797
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		2	0
Total Impaired Loans/Leases		314		491
Impaired Financing Receivable, Unpaid Principal Balance		389		572
Impaired Financing Receivable, Average Recorded Investment	[1]	314	1,138
Impaired Financing Receivable, Interest Income, Accrual Method		2	3
Cash Flow | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		50,690		51,272
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		65,605		52,910
Impaired Financing Receivable, Related Allowance		8,901		12,474
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,925		2,852
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		5,718		5,939
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	43,172	20,823
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	12
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	2,821	2,683
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		5	1
Asset Based | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,430		4,395
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,423		4,861
Impaired Financing Receivable, Related Allowance		144		2,144
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,651		664
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		3,782		1,652
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	1,162	3,696
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		15	27
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	2,279	1,181
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		25	15
Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		12,206		5,821
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		12,254		5,880
Impaired Financing Receivable, Related Allowance		3,222		3,294
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		3,083		5,866
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		9,907		8,939
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	4,693	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	2,429	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0		1,524
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0		4,636
Impaired Financing Receivable, Related Allowance		0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		30,388		31,324
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		51,682		53,319
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0	49,322
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	30,388	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
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		6,111		6,680
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		6,111		6,680
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	6,111	7,202
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		67	62
Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0		213
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0		213
Impaired Financing Receivable, Related Allowance		0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		572		364
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		576		366
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0	743
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	4
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	572	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		2	0
Commercial 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		14,350		63,325
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		15,257		65,031
Impaired Financing Receivable, Related Allowance		633		6,266
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		96,032		44,557
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		105,317		51,402
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	14,350	19,471
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		206	243
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	92,753	54,132
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		560	217
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		3,502		8,424
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		3,570		8,612
Impaired Financing Receivable, Related Allowance		437		585
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		5,277		7,779
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		6,408		$ 8,940
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	3,501	4,198
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		12	24
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	5,216	5,405
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		$ 15	$ 14
[1]	For Non-PCI loans and leases reported as impaired at March 31, 2017 and 2016, 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, 2017USD ($)Contract		Mar. 31, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		11		14
Pre-Modification Outstanding Recorded Investment		$ 13,987,000		$ 6,911,000
Post-Modification Outstanding Recorded Investment		$ 13,923,000		$ 6,911,000
Number of Loans | Contract		1		1
Recorded Investment	[2]	$ 28,000	[1]	$ 230,000	[3]
Charge-offs		$ 0		$ 0
Real Estate Mortgage | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		1		4
Pre-Modification Outstanding Recorded Investment		$ 64,000		$ 3,140,000
Post-Modification Outstanding Recorded Investment		$ 0		$ 3,140,000
Number of Loans | Contract		0		1
Recorded Investment	[2]	$ 0		$ 230,000
Real Estate Mortgage | Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		2		1
Pre-Modification Outstanding Recorded Investment		$ 42,000		$ 165,000
Post-Modification Outstanding Recorded Investment		$ 42,000		$ 165,000
Commercial | Cash Flow
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		2		4
Pre-Modification Outstanding Recorded Investment		$ 106,000		$ 257,000
Post-Modification Outstanding Recorded Investment		$ 106,000		$ 257,000
Commercial | Asset Based
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		2		2
Pre-Modification Outstanding Recorded Investment		$ 613,000		$ 629,000
Post-Modification Outstanding Recorded Investment		$ 613,000		$ 629,000
Commercial | Venture Capital Loans
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		3		0
Pre-Modification Outstanding Recorded Investment		$ 13,065,000		$ 0
Post-Modification Outstanding Recorded Investment		$ 13,065,000		$ 0
Commercial | Equipment Finance Commercial Financing Receivable
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		0		2
Pre-Modification Outstanding Recorded Investment		$ 0		$ 2,660,000
Post-Modification Outstanding Recorded Investment		$ 0		$ 2,660,000
Consumer
Financing Receivable, Modifications [Line Items]
Number of loans | Contract		1		1
Pre-Modification Outstanding Recorded Investment		$ 97,000		$ 60,000
Post-Modification Outstanding Recorded Investment		$ 97,000		$ 60,000
Consumer | Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | Contract		1		0
Recorded Investment	[2]	$ 28,000		$ 0
[1]	Represents the balance at March 31, 2017, and there were no charge-offs.
[2]	The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. For example, for the 12-month period ended March 31, 2017, the population of defaulted restructured loans includes only those loans restructured after March 31, 2016. The table excludes defaulted troubled restructurings in those classes for which the recorded investment was zero at the end of the period.
[3]	Represents the balance at March 31, 2016, and there were no charge-offs.

Loans and Leases (Details 7)

Loans and Leases (Details 7) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 157,238
Balance, end of period	161,307
The ending balance of the loan and lease portfolio is composed of loans and leases:
Ending balance of loans and leases	15,556,689		$ 15,455,954
Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	143,755	$ 105,534
Charge-offs	(20,928)	(5,373)
Recoveries	2,739	1,481
Provision	24,260	19,165
Balance, end of period	149,826	120,807
Amount of the allowance applicable to loans and leases:
impairment	13,427	30,040
impairment	136,399	90,767
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	228,460	196,491
impairment	15,231,894	14,110,470
Ending balance of loans and leases	15,460,354	14,306,961	15,347,530
Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	13,483
Balance, beginning of period	13,483	9,577
Charge-offs	(2,230)	(163)
Recoveries	0	0
Provision	228	140
Balance, end of period	11,481
Balance, end of period	11,481	9,554
Amount of the allowance applicable to loans and leases:
deteriorated credit quality	11,481	9,554
The ending balance of the loan and lease portfolio is composed of loans and leases:
deteriorated credit quality	96,335	176,556
Ending balance of loans and leases	96,335	176,556	108,424
NonPCI and PCI Loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	157,238	115,111
Charge-offs	(23,158)	(5,536)
Recoveries	2,739	1,481
Provision	24,488	19,305
Balance, end of period	161,307	130,361
The ending balance of the loan and lease portfolio is composed of loans and leases:
Total loans and leases	15,556,689	14,483,517
Real Estate Mortgage | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	37,765	36,654
Charge-offs	(1,544)	(737)
Recoveries	230	999
Provision	(1,083)	(7,817)
Balance, end of period	35,368	29,099
Amount of the allowance applicable to loans and leases:
impairment	1,070	1,954
impairment	34,298	27,145
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	118,275	90,830
impairment	5,768,694	5,539,467
Ending balance of loans and leases	5,886,969	5,630,297	5,617,956
Real Estate Construction and Land | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	10,045	7,137
Charge-offs	0	0
Recoveries	8	152
Provision	423	(413)
Balance, end of period	10,476	6,876
Amount of the allowance applicable to loans and leases:
impairment	0	21
impairment	10,476	6,855
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	6,683	7,945
impairment	1,101,553	567,528
Ending balance of loans and leases	1,108,236	575,473	962,839
Commercial | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	93,853	61,082
Charge-offs	(19,285)	(4,045)
Recoveries	2,448	314
Provision	25,118	26,606
Balance, end of period	102,134	83,957
Amount of the allowance applicable to loans and leases:
impairment	12,267	27,902
impairment	89,867	56,055
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	103,221	96,614
impairment	7,979,457	7,893,955
Ending balance of loans and leases	8,082,678	7,990,569	8,391,560
Consumer | Non Purchased Credit Impaired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	2,092	661
Charge-offs	(99)	(591)
Recoveries	53	16
Provision	(198)	789
Balance, end of period	1,848	875
Amount of the allowance applicable to loans and leases:
impairment	90	163
impairment	1,758	712
The ending balance of the loan and lease portfolio is composed of loans and leases:
impairment	281	1,102
impairment	382,190	109,520
Ending balance of loans and leases	$ 382,471	$ 110,622	$ 375,175

Loans and Leases (Details Textu

Loans and Leases (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Receivables [Abstract]
Nonaccrual Loans/Leases	$ 173,030,000		$ 170,599,000
Receivable, 90 or more days past due	9,600,000		15,900,000
Receivable, 30-89 days past due	4,000,000		3,000,000
Financing receivable, nonaccrual status, current	159,400,000		$ 151,700,000
Charge-offs	$ 0	$ 0

Foreclosed Assets (Details)

Foreclosed Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Total other real estate owned, net	$ 11,903	$ 11,876
Other foreclosed assets	939	1,100
Total foreclosed assets, net	12,842	12,976
Construction and land development
Total other real estate owned, net	11,224	11,224
Commercial real estate
Total other real estate owned, net	78	0
Multifamily [Member]
Total other real estate owned, net	$ 601	$ 652

Foreclosed Assets (Details 1)

Foreclosed Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Foreclosed Assets Rollforward [Abstract]
Balance, December 31, 2016	$ 12,976
Foreclosures	78	$ 129
Reductions related to sales	(212)
Balance, March 31, 2017	$ 12,842

Borrowings and Subordinated D49

Borrowings and Subordinated Debentures (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Borrowings	$ 460,609	$ 905,812
Non‑recourse debt
Debt Instrument [Line Items]
Amount	$ 609	$ 812
Rate	6.58%	6.41%
American Financial Exchange borrowings
Debt Instrument [Line Items]
Amount	$ 40,000	$ 40,000
Rate	1.05%	0.81%
Federal Home Loan Bank of San Francisco | FHLB secured advances
Debt Instrument [Line Items]
Amount	$ 290,000	$ 735,000
Rate	0.80%	0.59%
Federal Home Loan Bank of San Francisco | FHLB unsecured overnight advance
Debt Instrument [Line Items]
Amount	$ 130,000	$ 130,000
Rate	0.81%	0.55%

Borrowings and Subordinated D50

Borrowings and Subordinated Debentures (Details 1) $ in Thousands, € in Millions		3 Months Ended
		Mar. 31, 2017USD ($)	Mar. 31, 2017EUR (€)	Dec. 31, 2016USD ($)
Subordinated Borrowing [Line Items]
Amount		$ 539,360		$ 538,973
Unamortized discount	[1]	(96,844)		(98,229)
Net subordinated debentures		442,516		440,744
Subordinated Debt Trust V Due September 2033
Subordinated Borrowing [Line Items]
Amount		$ 10,310		$ 10,310
Rate		4.25%	4.25%	4.09%
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		4.18%	4.18%	4.01%
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		4.10%	4.10%	3.95%
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		3.79%	3.79%	3.64%
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		2.82%	2.82%	2.65%
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		2.73%	2.73%	2.56%
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		2.68%	2.68%	2.51%
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		3.08%	3.08%	2.91%
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		2.99%	2.99%	2.84%
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		2.99%	2.99%	2.84%
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		2.99%	2.99%	2.84%
Date Issued		Sep. 27, 2006
Maturity Date		Oct. 30, 2036
Description of variable rate basis		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Amount	[2]	$ 27,572		$ 27,185
Rate		1.72%	1.72%	1.74%
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		2.99%	2.99%	2.84%
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		2.99%	2.99%	2.84%
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		2.99%	2.99%	2.84%
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)		4.25%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust VI Due September 2033
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		4.18%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust CII Due September 2033
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		4.10%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust VII Due April 2034
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		3.79%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust CIII Due September 2035
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.82%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust FCCI Due March 2037
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.73%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust FCBI Due December 2035
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.68%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Five Series One
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		3.08%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Five Series Two
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.99%
London Interbank Offered Rate (LIBOR) | Two Thousand Six One Term Debt Securitization
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.99%
London Interbank Offered Rate (LIBOR) | Two Thousand Six Two Term Debt Securitization
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.99%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Six Series Four
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.99%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Six Series Five
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.99%
London Interbank Offered Rate (LIBOR) | Two Thousand Seven One Term Debt Securitization
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		2.99%
Euribor Future | Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Rate Index (Quarterly Reset)		1.72%
[1]	Amount represents the fair value adjustment on subordinated debentures assumed in acquisitions.
[2]	Denomination is in Euros with a value of €25.8 million.

Borrowings and Subordinated D51

Borrowings and Subordinated Debentures (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Non‑recourse debt
Debt Instrument [Line Items]
Weighted average remaining maturity period	2 years
Unused Lines of Credit
Debt Instrument [Line Items]
Amount outstanding	$ 0	$ 0
Current borrowing capacity	80,000,000
Unused commitment fees	0
American Financial Exchange borrowings
Debt Instrument [Line Items]
Amount outstanding	40,000,000	40,000,000
Maturity Overnight | American Financial Exchange borrowings
Debt Instrument [Line Items]
Amount outstanding	36,000,000	26,000,000
Maturity Less than 30 Days | American Financial Exchange borrowings
Debt Instrument [Line Items]
Amount outstanding	4,000,000	14,000,000
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	2,193,347,000
Federal Home Loan Bank of San Francisco
Debt Instrument [Line Items]
Loans pledged as collateral	3,900,000,000
Federal Home Loan Bank of San Francisco | FHLB secured advances
Debt Instrument [Line Items]
Borrowing capacity description	2,728,762,000
Current outstanding	290,000,000	735,000,000
Federal Home Loan Bank of San Francisco | FHLB unsecured overnight advance
Debt Instrument [Line Items]
Current outstanding	130,000,000	130,000,000
Federal Home Loan Bank of San Francisco | Unused Lines of Credit
Debt Instrument [Line Items]
Borrowing capacity description	130,000,000
Amount outstanding		130,000,000
Federal Home Loan Bank of San Francisco | Maturity Overnight
Debt Instrument [Line Items]
Current outstanding		435,000,000
Federal Home Loan Bank of San Francisco | Maturity Less than 30 Days
Debt Instrument [Line Items]
Current outstanding		$ 300,000,000
Less Than Thirty (30) Days [Member] | Maturity Less than 30 Days | American Financial Exchange borrowings
Debt Instrument [Line Items]
Amount outstanding	2,000,000
Less Than Twenty (20) Days [Member] | Maturity Less than 30 Days | American Financial Exchange borrowings
Debt Instrument [Line Items]
Amount outstanding	$ 2,000,000

Commitments and Contingencies52

Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Loan commitments to extend credit	$ 4,497,373	$ 4,166,703
Standby letters of credit	221,718	211,398
Total	$ 4,719,091	$ 4,378,101

Commitments and Contingencies53

Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Long-term Purchase Commitment [Line Items]
Commitment to contribute capital	$ 31.7	$ 26.6
Private Equity Funds
Long-term Purchase Commitment [Line Items]
Remaining minimum amount committed	2.4	$ 2.8
Student Loan [Member]
Long-term Purchase Commitment [Line Items]
Remaining minimum amount committed	$ 6.8

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Securities available‑for‑sale	$ 3,336,992	$ 3,223,830
Equity warrants		5,497
Level 1
Securities available‑for‑sale		2,080
Level 2
Securities available‑for‑sale		3,156,475
Level 3
Securities available‑for‑sale		65,275
Government agency and government-sponsored enterprise pass through securities
Securities available‑for‑sale	474,556	502,443
Government agency and government-sponsored enterprise collateralized mortgage obligations
Securities available‑for‑sale	138,932	146,289
Municipal securities
Securities available‑for‑sale	1,483,281	1,456,459
Government agency and government-sponsored enterprise commercial mortgage-backed securities
Securities available‑for‑sale	712,071	547,692
Corporate debt securities
Securities available‑for‑sale	18,211	47,509
Collateralized loan obligations
Securities available‑for‑sale	127,973	156,887
SBA asset-backed securities
Securities available‑for‑sale	168,334	178,845
Asset-backed and other securities
Securities available‑for‑sale	64,234	62,237
Fair Value, Measurements, Recurring
Securities available‑for‑sale	3,336,992	3,223,830
Derivative assets	427	694
Equity warrants	5,368	5,497
Total recurring assets	3,342,787	3,230,021
Derivative liabilities	3,295	3,285
Fair Value, Measurements, Recurring | Level 1
Securities available‑for‑sale	1,960	2,080
Derivative assets	0	0
Equity warrants	0	0
Total recurring assets	1,960	2,080
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 2
Securities available‑for‑sale	3,281,875	3,156,475
Derivative assets	427	694
Equity warrants	0	0
Total recurring assets	3,282,302	3,157,169
Derivative liabilities	3,295	3,285
Fair Value, Measurements, Recurring | Level 3
Securities available‑for‑sale	53,157	65,275
Derivative assets	0	0
Equity warrants	5,368	5,497
Total recurring assets	58,525	70,772
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities
Securities available‑for‑sale	474,556	502,443
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities | Level 2
Securities available‑for‑sale	474,556	502,443
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations
Securities available‑for‑sale	138,932	146,289
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations | Level 2
Securities available‑for‑sale	138,932	146,289
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations
Securities available‑for‑sale	149,400	125,469
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations | Level 2
Securities available‑for‑sale	104,119	68,567
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations | Level 3
Securities available‑for‑sale	45,281	56,902
Fair Value, Measurements, Recurring | Municipal securities
Securities available‑for‑sale	1,483,281	1,456,459
Fair Value, Measurements, Recurring | Municipal securities | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Municipal securities | Level 2
Securities available‑for‑sale	1,483,281	1,456,459
Fair Value, Measurements, Recurring | Municipal securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities
Securities available‑for‑sale	712,071	547,692
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities | Level 2
Securities available‑for‑sale	712,071	547,692
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise commercial mortgage-backed securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Corporate debt securities
Securities available‑for‑sale	18,211	47,509
Fair Value, Measurements, Recurring | Corporate debt securities | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Corporate debt securities | Level 2
Securities available‑for‑sale	18,211	47,509
Fair Value, Measurements, Recurring | Corporate debt securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Collateralized loan obligations
Securities available‑for‑sale	127,973	156,887
Fair Value, Measurements, Recurring | Collateralized loan obligations | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Collateralized loan obligations | Level 2
Securities available‑for‑sale	127,973	156,887
Fair Value, Measurements, Recurring | Collateralized loan obligations | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | SBA asset-backed securities
Securities available‑for‑sale	168,334	178,845
Fair Value, Measurements, Recurring | SBA asset-backed securities | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | SBA asset-backed securities | Level 2
Securities available‑for‑sale	168,334	178,845
Fair Value, Measurements, Recurring | SBA asset-backed securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Asset-backed and other securities
Securities available‑for‑sale	64,234	62,237
Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 1
Securities available‑for‑sale	1,960	2,080
Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 2
Securities available‑for‑sale	54,398	51,784
Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 3
Securities available‑for‑sale	$ 7,876
Square 1 Financial, Inc. [Member] | Fair Value, Measurements, Recurring | Level 3
Equity warrants		5,497
Square 1 Financial, Inc. [Member] | Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 3
Securities available‑for‑sale		$ 8,373

Fair Value Measurements (Deta55

Fair Value Measurements (Details 1) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Level 3 CMO Roll Forward [Abstract]
Equity warrants		$ 5,497
Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Equity warrants	$ 5,368	5,497
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants, Acquired From Acquisition		5,497
Level 3 CMO Roll Forward [Abstract]
Total included in other comprehensive income	0
Gain on Sale of Investments	155
Proceeds from Issuance of Warrants	(518)
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	234
Transfers to Available-For-Sale	0
Level 3 | Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Equity warrants	5,368	5,497
Level 3 | Private Label CMOs | Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Balance, December 31, 2016	56,902
Total included in earnings	1,063
Total included in other comprehensive income	(534)
Net settlements	(7,418)
Balance, March 31, 2017	45,281	56,902
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(4,732)
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	0
Level 3 | Asset-backed and other securities | Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Balance, December 31, 2016	8,373
Total included in earnings	25
Total included in other comprehensive income	(42)
Net settlements	(480)
Balance, March 31, 2017	7,876	$ 8,373
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	$ 0
Level 3 | Minimum | Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Voluntary annual prepayment speeds	2.40%
Annual default rates	0.00%
Loss severity rates	0.00%
Discount rates	0.00%
Level 3 | Minimum | SBA securities | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Voluntary annual prepayment speeds	5.00%
Annual default rates	1.00%
Loss severity rates	15.00%
Discount rates	3.50%
Level 3 | Maximum | Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Voluntary annual prepayment speeds	32.60%
Annual default rates	14.50%
Loss severity rates	92.90%
Discount rates	10.30%
Level 3 | Maximum | SBA securities | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Voluntary annual prepayment speeds	5.00%
Annual default rates	1.00%
Loss severity rates	15.00%
Discount rates	3.50%
Level 3 | Weighted Average | Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Voluntary annual prepayment speeds	8.80%
Annual default rates	2.30%
Loss severity rates	41.00%
Discount rates	4.40%
Level 3 | Weighted Average | SBA securities | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Voluntary annual prepayment speeds	5.00%
Annual default rates	1.00%
Loss severity rates	15.00%
Discount rates	3.50%
Level 3 | Weighted Average | Warrant | Fair Value, Measurements, Recurring
Weighted Average Input
Remaining life assumption (in years)	3 years 9 months 20 days
Warrant | Level 3
Weighted Average Input
Volatility	17.80%
Warrant | Level 3 | Weighted Average
Weighted Average Input
Risk-free interest rate	1.70%

Fair Value Measurements (Deta56

Fair Value Measurements (Details 2) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 161,215
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		12,885
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 73,047	148,330
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	73,047	149,749
Non Purchased Credit Impaired Loans and Leases | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		0
Non Purchased Credit Impaired Loans and Leases | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		1,661
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 Disclosure, Nonrecurring	$ 73,047	148,088
Other real estate and foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		11,224
Other real estate and foreclosed assets | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		0
Other real estate and foreclosed assets | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		11,224
Cost-method Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		242
Cost-method Investments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		0
Cost-method Investments | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		0
Cost-method Investments | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		242
Third party appraisals | Other real estate and foreclosed assets | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 0

Fair Value Measurements (Deta57

Fair Value Measurements (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
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 Net Gain (Loss) from Nonrecurring Assets	$ 13,617	$ 12,909

Fair Value Measurements (Deta58

Fair Value Measurements (Details 4) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 161,215
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 73,047	148,330
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	73,047	149,749
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 Disclosure, Nonrecurring	$ 73,047	148,088
Cost-method Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		242
Cost-method Investments | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 242
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	0.00%
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	8.75%
Weighted Average | Discounted Cash Flow | Non Purchased Credit Impaired Loans and Leases | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	6.60%
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]
Assets, Fair Value Disclosure, Nonrecurring	$ 65,114
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	6.60%
No Discounts | Third party appraisals | 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 Disclosure, Nonrecurring	$ 7,933

Fair Value Measurements (Deta59

Fair Value Measurements (Details 5) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 184,608	$ 337,965
Interest-earning deposits in financial institutions	111,892	81,705
Securities available-for-sale, at fair value	3,336,992	3,223,830
Available-for-sale Securities	3,336,992	3,223,830
Federal Home Loan Bank stock, at cost	17,901	21,870
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	17,901	21,870
Cost Method Investments	1,175	1,416
Cost Method Investments, Fair Value Disclosure	12,412	3,843
Loans and leases, net	15,395,382	15,298,716
Loans Receivable, Fair Value Disclosure	15,526,920
Derivative Asset	427	694
Deposits, Savings Deposits	13,923,143	13,698,321
Time Deposits	2,407,865	2,172,290
Deposits, Fair Value Disclosure	2,399,793	2,166,187
Borrowings	460,609	905,812
Long-term Debt, Fair Value	460,627	905,838
Subordinated debentures	442,516	440,744
Subordinated Debt Obligations, Fair Value Disclosure	425,914	424,507
Derivative Liability		3,285
Equity warrants		5,497
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	184,608	337,965
Interest-earning deposits in financial institutions	111,892	81,705
Available-for-sale Securities		2,080
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	0	0
Cost Method Investments, Fair Value Disclosure	0	0
Deposits, Savings Deposits	0	0
Deposits, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	456,000	591,000
Subordinated Debt Obligations, Fair Value Disclosure	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
Available-for-sale Securities		3,156,475
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	17,901	21,870
Cost Method Investments, Fair Value Disclosure	0	0
Deposits, Savings Deposits	13,923,143	13,698,321
Deposits, Fair Value Disclosure	2,399,793	2,166,187
Long-term Debt, Fair Value	4,627	314,838
Subordinated Debt Obligations, Fair Value Disclosure	425,914	424,507
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
Available-for-sale Securities		65,275
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	0	0
Cost Method Investments, Fair Value Disclosure	12,412	3,843
Loans Receivable, Fair Value Disclosure	15,526,920
Deposits, Savings Deposits	0	0
Deposits, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Subordinated Debt Obligations, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	3,336,992	3,223,830
Derivative assets	427	694
Derivative liabilities	3,295	3,285
Equity warrants	5,368	5,497
Fair Value, Measurements, Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	1,960	2,080
Derivative assets	0	0
Derivative liabilities	0	0
Equity warrants	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	3,281,875	3,156,475
Derivative assets	427	694
Derivative liabilities	3,295	3,285
Equity warrants	0	0
Fair Value, Measurements, Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	53,157	65,275
Derivative assets	0	0
Derivative liabilities	0	0
Equity warrants	5,368	5,497
Fair Value, Measurements, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		161,215
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		0
Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		12,885
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	73,047	148,330
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	73,047	149,749
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Receivable, Fair Value Disclosure	0
Assets, Fair Value Disclosure, Nonrecurring		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 Receivable, Fair Value Disclosure	0
Assets, Fair Value Disclosure, Nonrecurring		1,661
Non Purchased Credit Impaired Loans and Leases | Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 73,047	148,088
NonPCI and PCI Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases, net		15,298,716
Loans Receivable, Fair Value Disclosure		15,494,808
NonPCI and PCI Loans | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Receivable, Fair Value Disclosure		0
NonPCI and PCI Loans | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Receivable, Fair Value Disclosure		1,661
NonPCI and PCI Loans | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Receivable, Fair Value Disclosure		$ 15,493,147

Fair Value Measurements (Deta60

Fair Value Measurements (Details Textual)	Mar. 31, 2017USD ($)
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Earnings Per Share [Abstract]
Net earnings from continuing operations		$ 78,668	$ 85,647	$ 90,456
Less: Earnings allocated to unvested restricted stock	[1]	(999)	(1,004)	(1,067)
Net earnings allocated to common shares		$ 77,669	$ 84,643	$ 89,389
Weighted-average basic shares and unvested restricted stock outstanding (shares)		121,346	121,464	121,598
Weighted-average unvested restricted stock outstanding (shares)		(1,503)	(1,450)	(1,392)
Weighted-average basic shares outstanding (shares)		119,843	120,014	120,206
Basic net income per share (usd per share)		$ 0.65	$ 0.71	$ 0.74
Net earnings from continuing operations allocated to common shares		$ 77,669	$ 84,643	$ 89,389
Diluted net income per share (usd per share)		$ 0.65	$ 0.71	$ 0.74
[1]	Represents cash dividends paid to holders of unvested restricted stock, net of estimated forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.

Stock Based Compensation (Detai

Stock Based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	1,537,717	1,476,132
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	$ 6.5	$ 6.1	$ 5
Restricted Stock Awards And Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share based compensation expense	$ 52.8
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	239,025
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)	19,686,565
Number of shares available for grant (shares)	12,148,677
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)	1,537,717

Subsequent Events (Details Text

Subsequent Events (Details Textuals)	May 01, 2017$ / shares	Apr. 06, 2017USD ($)bank_branch$ / sharesshares	Mar. 31, 2017$ / shares	Dec. 31, 2016$ / shares	Mar. 31, 2016$ / shares
Subsequent Event [Line Items]
Common Stock par value (usd per share)			$ 0.01	$ 0.01
Dividends declared per share (usd per share)			$ 0.50	$ 0.50	$ 0.5
Subsequent Event [Member]
Subsequent Event [Line Items]
number of branches | bank_branch		87
Subsequent Event [Member] | Dividend Declared
Subsequent Event [Line Items]
Dividends declared per share (usd per share)	$ 0.5
California United Bancorp [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Transferred | $		$ 705,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $		$ 3,000,000,000
Retail branch locations | bank_branch		9
Consolidated Total Assets Proforma Upon Acquisition | $		$ 25,000,000,000
Business Acquisition Shares Receivable By Stockholders Of Acquiree Ratio (in shares) | shares		0.5308
Business Acquisition, Share Price (in dollars per share)		$ 12
Common Stock par value (usd per share)		$ 51.72
Business Acquisition, Purchase Price Allocation | $		$ 39.45