Pacwest Bancorp (PACW) 10-Q 9 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 27, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	PACWEST BANCORP
Entity Central Index Key	1,102,112
Document Period End Date	Mar. 31, 2016
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		120,208,695

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets [Abstract]
Cash and due from banks	$ 161,977	$ 161,020
Interest-earning deposits in financial institutions	357,541	235,466
Total cash and cash equivalents	519,518	396,486
Securities available-for-sale, at fair value	3,240,586	3,559,437
Federal Home Loan Bank stock, at cost	17,250	19,710
Total investment securities	3,257,836	3,579,147
Gross loans and leases	14,542,522	14,528,165
Deferred fees and costs		(49,911)
Allowance for loan and lease losses	130,361	115,111
Total loans and leases, net	14,353,156	14,363,143
Equipment leased to others under operating leases	205,163	197,452
Premises and equipment, net	39,713	39,197
Foreclosed assets, net	18,310	22,120
Goodwill	2,175,791	2,176,291
Core deposit and customer relationship intangibles, net	48,137	53,220
Deferred tax asset, net	91,126	126,389
Other assets	322,259	335,045
Total assets	21,031,009	21,288,490
Liabilities and Equity [Abstract]
Noninterest-bearing deposits	6,139,963	6,171,455
Interest-bearing deposits	9,301,412	9,494,727
Total deposits	15,441,375	15,666,182
Borrowings	551,401	621,914
Subordinated debentures	438,723	436,000
Accrued interest payable and other liabilities	142,918	166,703
Total liabilities	16,574,417	16,890,799
Commitments and contingencies (Note 8)	0	0
Preferred stock ($0.01 par value; 5,000,000 shares authorized; none issued and outstanding)	0	0
Additional paid-in capital	4,353,706	4,405,775
Retained earnings	104,363	13,907
Common stock ($0.01 par value, 200,000,000 shares authorized at March 31, 2016 and December 31, 2015; 123,153,983 and 122,791,729 shares issued, respectively, including 1,562,557 and 1,211,951 shares of unvested restricted stock, respectively)	1,232	1,228
Treasury stock, at cost (1,382,731 and 1,378,002 shares at March 31, 2016 and December 31, 2015)	(51,188)	(51,047)
Accumulated other comprehensive income, net	48,479	27,828
Total stockholders' equity	4,456,592	4,397,691
Total liabilities and stockholders' equity	$ 21,031,009	$ 21,288,490

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
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)	123,153,983	122,791,729
Unvested restricted shares (shares)	1,562,557	1,211,951
Treasury Stock (shares)	1,382,731	1,378,002

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Interest income:
Loans and leases	$ 236,375	$ 219,677	$ 202,097
Investment securities	22,547	23,648	12,195
Deposits in financial institutions	308	172	22
Total interest income	259,230	243,497	214,314
Interest expense:
Deposits	9,073	9,391	10,479
Borrowings	581	159	235
Subordinated debentures	4,982	4,748	4,525
Total interest expense	14,636	14,298	15,239
Net interest income	244,594	229,199	199,075
Provision for credit losses	20,140	13,772	16,434
Net interest income after provision for credit losses	224,454	215,427	182,641
Non-interest income:
Service charges on deposit accounts	3,856	3,901	2,574
Other commissions and fees	11,489	12,691	5,396
Leased equipment income	8,244	7,791	5,382
Gain on sale of loans and leases	245	183	0
Gain on sale of securities	8,110	0	3,275
FDIC loss sharing expense, net	(2,415)	(4,291)	(4,399)
Other income	5,010	7,783	8,643
Total noninterest income	34,539	28,058	20,871
Non-interest expense:
Compensation	61,065	58,992	47,737
Occupancy	12,632	12,194	10,600
Data processing	5,904	5,585	4,308
Other professional services	3,572	3,811	3,221
Insurance and assessments	4,965	5,450	3,025
Intangible asset amortization	4,746	4,910	1,501
Leased equipment depreciation	5,024	4,235	3,103
Foreclosed Real Estate (Income) Expense	(561)	(3,185)	336
Acquisition, integration and reorganization costs	200	17,600	2,000
Other expense	13,141	12,672	8,529
Total noninterest expense	110,688	122,264	84,360
Earnings before income taxes	148,305	121,221	119,152
Income tax expense	(57,849)	(49,380)	(46,073)
Net earnings	$ 90,456	$ 71,841	$ 73,079
Earnings Per Share, Basic [Abstract]
Net earnings (usd per share)	$ 0.74	$ 0.60	$ 0.71
Earnings Per Share, Diluted [Abstract]
Net earnings (usd per share)	0.74	0.60	0.71
Dividends [Abstract]
Dividends declared per share (usd per share)	$ 0.50	$ 0.50	$ 0.5

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings		$ 90,456	$ 71,841	$ 73,079
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized holding (losses) gains on securities available-for-sale		43,093	5,874	7,363
Income tax benefit (expense) related to unrealized holding (losses) gains arising during the period		(17,655)	(2,505)	(3,105)
Unrealized holding losses (gains) on securities available-for-sale, net of tax		25,438	3,369	4,258
Reclassification adjustment for losses (gains) included in net earnings	[1]	(8,110)	0	(3,275)
Income tax (benefit) expense related to reclassification adjustment		3,323	0	1,381
Reclassification adjustment for losses (gains) included in net earnings, net of tax		(4,787)	0	(1,894)
Other comprehensive (loss) income, net of tax		20,651	3,369	2,364
Comprehensive income		$ 111,107	$ 75,210	$ 75,443
[1]	Entire amounts are recognized in "Gain on sale of securities" on the Condensed Consolidated Statements of Earnings.

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity - 3 months ended Mar. 31, 2016 - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2015	$ 4,397,691,000	$ 1,228,000	$ 4,405,775,000	$ 13,907,000	$ (51,047,000)	$ 27,828,000
Shares outstanding, beginning balance (shares) at Dec. 31, 2015		121,413,727
Stockholders' Equity Disclosure [Rollforward]
Net earnings	90,456,000			90,456,000
Other comprehensive loss-net unrealized loss on securities available-for-sale, net of tax	20,651,000	$ 0	0	0	0	20,651,000
Restricted stock awarded and earned stock compensation, net of shares forfeited	5,046,000	$ 4,000	5,042,000	0	0	0
Restricted stock awarded and earned compensation, net of shares forfeited (shares)		362,254
Restricted stock surrendered	(141,000)	$ 0	0	0	(141,000)	0
Restricted stock surrendered (shares)		(4,729)
Tax effect from vesting of restricted stock	3,795,000	$ 0	3,795,000	0	0	0
Cash dividends paid	(60,906,000)	0	(60,906,000)	0	0	0
Ending Balance at Mar. 31, 2016	$ 4,456,592,000	$ 1,232,000	$ 4,353,706,000	$ 104,363,000	$ (51,188,000)	$ 48,479,000
Shares outstanding, ending balance (shares) at Mar. 31, 2016		121,771,252

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net earnings	$ 90,456		$ 73,079
Depreciation and amortization	22,488		10,648
Provision for credit losses	20,140	$ 13,772	16,434
(Gain) loss on sale of foreclosed assets	(504)		106
Provision for losses on foreclosed assets	0		124
Gain on sale of loans and leases	(245)	(183)	0
Gain on sale of premises and equipment	(6)		(3)
Gain on sale of securities	(8,110)		(3,275)
Unrealized gain on derivatives and foreign currencies, net	(250)		(2,715)
Earned stock compensation	5,046		3,112
Gain (Loss) on Sale of Capital Leases, Net	720		0
Tax effect included in stockholders' equity of restricted stock vesting	(3,795)		0
Decrease in accrued and deferred income taxes, net	24,726		38,722
Decrease in other assets	5,214		19,356
Decrease in accrued interest payable and other liabilities	(23,722)		(29,102)
Net cash provided by operating activities	132,158		126,486
Net Cash Provided by (Used in) Investing Activities [Abstract]
Net increase in loan and leases	(170,465)		(403,438)
Proceeds from sales of loans and leases	26,903		0
Proceeds from maturities and paydowns	61,626		27,547
Proceeds from sales	343,031		144,945
Purchases	(52,236)		(196,568)
Net redemptions of Federal Home Loan Bank stock	2,460		11,704
Proceeds from sales of foreclosed assets	4,443		7,945
Purchases of premises and equipment, net	(2,896)		(1,490)
Proceeds from sales of premises and equipment	6		29
Proceeds from Sale and Collection of Lease Receivables	138,809		0
Proceeds from Life Insurance Policies	1,853		0
Net increase of equipment leased to others under operating leases	(12,300)		0
Net cash provided by (used in) investing activities	341,234		(409,326)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Noninterest-bearing	(31,310)		97,224
Interest-bearing	(193,315)		80,914
Net (decrease) increase in borrowings	(68,483)		234,754
Restricted stock surrendered	(141)		0
Tax effect included in stockholders' equity of restricted vesting stock	3,795		0
Cash dividends paid	(60,906)		(51,424)
Net cash (used in) provided by financing activities	(350,360)		361,468
Net increase in cash and cash equivalents	123,032		78,628
Cash and cash equivalents at beginning of period	396,486		313,226
Cash and cash equivalents at end of period	519,518	$ 396,486	391,854
Noncash transactions from investing activities:
Cash paid for interest	15,080		12,334
Income Taxes Paid, Net	15,773		(7,695)
Loans transferred to foreclosed assets	$ 129		$ 394

Organization

Organization	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization PacWest Bancorp is a bank holding company registered under the Bank Holding Company Act of 1956, as amended. Our principal business is to serve as the holding company for our wholly-owned banking subsidiary, Pacific Western Bank, which we refer to as “Pacific Western” or the “Bank.” When we say “we,” “our,” or the “Company,” we mean 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. As of March 31, 2016 , the Company had total assets of $21.0 billion , gross loans and leases of $14.5 billion , total deposits of $15.4 billion and total stockholders' equity of $4.5 billion . 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 79 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 leases, and comprehensive deposit and treasury management services to small and middle market businesses. Pacific Western offers products and services through its CapitalSource and Square 1 Bank divisions. CapitalSource focuses on providing cash flow, asset-based, equipment and real estate loans and treasury management services to established middle-market businesses on a national basis. Square 1 Bank focuses on providing a comprehensive suite of financial products tailored to service 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. When we refer to "CapitalSource Inc." we are referring to the company acquired on April 7, 2014 and when we refer to the "CapitalSource Division" we are referring to a division of Pacific Western Bank that specializes in middle-market lending on a nationwide basis. 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, 2016 , including the acquisition of Square 1 Financial, Inc. ("Square 1") on October 6, 2015 . 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 2. Acquisitions , for more information about the Square 1 acquisition. On March 31, 2016, we sold our Pacific Western Equipment Finance ("PWEF") leasing unit in Midvale, Utah, including approximately $139 million of outstanding lease balances. 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, 2015 as filed with the Securities and Exchange Commission ("Form 10-K"). Basis of Presentation Our interim consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“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 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. Material estimates subject to change in the near term include, among other items, the allowance for credit losses, the carrying value and useful lives of intangible assets, the carrying value of the FDIC loss sharing asset, 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. As described in Note 2 , Acquisitions, the acquired assets and liabilities of Square 1 were measured at their estimated fair values. We made significant estimates and exercised significant judgment in estimating fair values and accounting for such acquired assets and assumed liabilities. Reclassifications Certain prior period amounts have been reclassified to conform to the current period's presentation format. The operating segments previously reported have been aggregated to one segment to conform to the current period's presentation format.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Acquisitions	Acquisitions Square 1 Financial, Inc. Acquisition We acquired Square 1 Financial, Inc. ("Square 1") on October 6, 2015 . As part of the acquisition, Square 1 Bank, a wholly-owned subsidiary of Square 1, merged with and into Pacific Western. At closing, we formed the Square 1 Bank Division of the Bank which focuses on providing a comprehensive suite of financial services to entrepreneurial businesses and their venture capital and private equity investors nationwide. We completed this acquisition to increase our core deposits, expand our nationwide lending platform, and increase our presence in the technology and life-sciences credit markets. The Square 1 acquisition has been accounted for under the acquisition method of accounting. We acquired $4.6 billion of assets and assumed $3.8 billion of liabilities upon closing of the acquisition. The assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of the acquisition date. We made significant estimates and exercised significant judgment in estimating fair values and accounting for such acquired assets and liabilities. Such fair values are preliminary estimates and are subject to adjustment for up to one year after the acquisition date or when additional information relative to the closing date fair values becomes available and such information is considered final, whichever is earlier. The fair value of the acquired net tax assets, once the final tax returns have been filed, may change. The application of the acquisition method of accounting resulted in goodwill of $447.9 million . All of the recognized goodwill is expected to be non-deductible for tax purposes. Acquisition-Related Charges The costs shown for the three months ended March 31, 2016 and December 31, 2015 relate to the Square 1 acquisition and ongoing systems integration. The following table presents the components of acquisition, integration and reorganization costs for the periods indicated: Three Months Ended March 31, December 31, March 31, 2016 2015 2015 (In thousands) Acquisition, Integration and Reorganization Costs: Severance and employee-related $ — $ 10,500 $ — System conversion and integration 200 3,802 — Asset write-downs, lease terminations and other facilities-related — 125 — Investment banking deal costs — — 1,050 Other (legal, accounting, insurance, consulting) — 3,173 950 Total acquisition, integration and reorganization costs $ 200 $ 17,600 $ 2,000

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure	Goodwill and Other Intangible Assets Goodwill arises from the acquisition method of accounting for business combinations and represents the excess of the purchase price over the fair value of the net assets and other identifiable intangible assets acquired. Our intangible assets with definite lives are core deposit intangibles ("CDI") and customer relationship intangibles ("CRI"). Goodwill and other intangible assets deemed to have indefinite lives generated from business combinations are not subject to amortization and are instead tested for impairment no less than annually. Impairment exists when the carrying value of goodwill exceeds its implied fair value. An impairment loss would be recognized in an amount equal to that excess and would be included in “Noninterest expense” in the condensed consolidated statements of earnings. 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, 2016 is 6.0 years. The aggregate CDI and CRI amortization expense is expected to be $16.1 million for 2016 . The estimated aggregate amortization expense related to these intangible assets for each of the next five years is $11.5 million for 2017 , $8.8 million for 2018 , $6.7 million for 2019 , $4.7 million for 2020 , and $3.0 million for 2021 . The following table presents the changes in the carrying amount of goodwill for the period indicated: Goodwill (In thousands) Balance, December 31, 2015 $ 2,176,291 Reduction due to sale of PWEF leasing unit (500 ) Balance, March 31, 2016 $ 2,175,791 Through the sale of the PWEF leasing unit, $500,000 of goodwill was allocated to this business group; such goodwill reduction is included in the loss on sale of the PWEF leasing unit and included in "Other income" in the condensed consolidated statement of earnings. 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, 2016 2015 2015 (In thousands) Gross Amount of CDI and CRI: Balance, beginning of period $ 95,524 $ 53,090 $ 53,090 Additions — 45,426 — Fully amortized portion — (2,992 ) — Reduction due to sale of PWEF leasing unit (1,700 ) — — Balance, end of period 93,824 95,524 53,090 Accumulated Amortization: Balance, beginning of period (42,304 ) (40,386 ) (35,886 ) Amortization (4,746 ) (4,910 ) (1,501 ) Fully amortized portion — 2,992 — Reduction due to sale of PWEF leasing unit 1,363 — — Balance, end of period (45,687 ) (42,304 ) (37,387 ) Net CDI and CRI, end of period $ 48,137 $ 53,220 $ 15,703

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2016
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 carrying values of securities available-for-sale as of the dates indicated: March 31, 2016 December 31, 2015 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 mortgage-backed securities: Government agency and government-sponsored enterprise pass-through securities $ 642,233 $ 12,865 $ (1,233 ) $ 653,865 $ 759,881 $ 12,075 $ (4,159 ) $ 767,797 Government agency and government-sponsored enterprise collateralized mortgage obligations 431,456 12,515 (239 ) 443,732 486,065 3,584 (3,410 ) 486,239 Covered private label collateralized mortgage obligations 23,026 5,064 (227 ) 27,863 24,113 5,794 (125 ) 29,782 Other private label collateralized mortgage obligations 108,019 246 (883 ) 107,382 115,952 43 (981 ) 115,014 Municipal securities 1,457,795 59,886 (89 ) 1,517,592 1,508,968 39,435 (1,072 ) 1,547,331 US Treasury securities — — — — 70,196 — (816 ) 69,380 Corporate debt securities 47,269 303 (2,089 ) 45,483 49,047 327 (950 ) 48,424 Collateralized loan obligations 142,637 42 (3,107 ) 139,572 133,192 128 (1,131 ) 132,189 SBA securities 201,934 947 (207 ) 202,674 211,946 41 (830 ) 211,157 Government-sponsored enterprise debt securities — — — — 36,302 611 — 36,913 Asset-backed and other securities 104,182 135 (1,894 ) 102,423 116,723 119 (1,631 ) 115,211 Total $ 3,158,551 $ 92,003 $ (9,968 ) $ 3,240,586 $ 3,512,385 $ 62,157 $ (15,105 ) $ 3,559,437 As of March 31, 2016 , securities available‑for‑sale with a carrying value of $414.6 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, 2016 and 2015 , we purchased $52.2 million and $196.6 million in securities available-for-sale. During the three months ended March 31, 2016 , we sold $334.9 million of various securities, primarily government agency and government-sponsored enterprise ("GSE") pass-through securities and collateralized mortgage obligations, U.S. Treasury securities and GSE debt securities, for a gross realized gain of $8.9 million and a gross realized loss of $0.8 million . During the three months ended March 31, 2015 , we sold $141.7 million of various securities, primarily corporate debt securities and GSE pass-through securities, for a gross realized gain of $3.7 million and a gross realized loss of $0.4 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, 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 mortgage-backed securities: Government agency and government- sponsored enterprise pass-through securities $ 196,388 $ (1,135 ) $ 9,422 $ (98 ) $ 205,810 $ (1,233 ) Government agency and government- sponsored enterprise collateralized mortgage obligations 33,702 (239 ) — — 33,702 (239 ) Covered private label collateralized mortgage obligations 1,239 (98 ) 849 (129 ) 2,088 (227 ) Other private label collateralized mortgage obligations 59,407 (838 ) 1,029 (45 ) 60,436 (883 ) Municipal securities 18,108 (55 ) 5,496 (34 ) 23,604 (89 ) Corporate debt securities 28,180 (2,089 ) — — 28,180 (2,089 ) Collateralized loan obligations 106,773 (2,121 ) 23,355 (986 ) 130,128 (3,107 ) SBA securities 87,150 (207 ) — — 87,150 (207 ) Asset-backed and other securities 64,013 (1,285 ) 15,923 (609 ) 79,936 (1,894 ) Total $ 594,960 $ (8,067 ) $ 56,074 $ (1,901 ) $ 651,034 $ (9,968 ) December 31, 2015 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 mortgage-backed securities: Government agency and government- sponsored enterprise pass-through securities $ 391,642 $ (3,893 ) $ 9,342 $ (266 ) $ 400,984 $ (4,159 ) Government agency and government- sponsored enterprise collateralized mortgage obligations 314,284 (2,769 ) 14,230 (641 ) 328,514 (3,410 ) Covered private label collateralized mortgage obligations 1,354 (57 ) 568 (68 ) 1,922 (125 ) Other private label collateralized mortgage obligations 92,179 (943 ) 1,070 (38 ) 93,249 (981 ) Municipal securities 126,892 (1,061 ) 531 (11 ) 127,423 (1,072 ) US Treasury securities 69,380 (816 ) — — 69,380 (816 ) Corporate debt securities 29,379 (950 ) — — 29,379 (950 ) Collateralized loan obligations 100,993 (1,131 ) — — 100,993 (1,131 ) SBA securities 179,942 (830 ) — — 179,942 (830 ) Asset-backed and other securities 71,619 (1,182 ) 16,091 (449 ) 87,710 (1,631 ) Total $ 1,377,664 $ (13,632 ) $ 41,832 $ (1,473 ) $ 1,419,496 $ (15,105 ) We reviewed the securities that were in a loss position at March 31, 2016 , and concluded their unrealized losses were not a result of downgraded credit ratings or other indicators of deterioration of the underlying issuers' ability to repay. Such unrealized losses were a result of the level of market interest rates and pricing changes caused by shifting supply and demand dynamics relative to the types of securities. Accordingly, we determined the securities were temporarily impaired and we did not recognize such impairment in the condensed consolidated statements of earnings. Although we occasionally 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 available-for-sale securities portfolio based on amortized cost and carrying value as of the date indicated: March 31, 2016 Amortized Fair Maturity: Cost Value (In thousands) Due in one year or less $ 12,821 $ 12,628 Due after one year through five years 216,420 219,110 Due after five years through ten years 603,523 619,214 Due after ten years 2,325,787 2,389,634 Total securities available-for-sale $ 3,158,551 $ 3,240,586 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, 2016 2015 2015 (In thousands) Taxable interest $ 11,396 $ 12,730 $ 7,473 Non-taxable interest 10,726 10,459 3,894 Dividend income 425 459 828 Total interest income on investment securities $ 22,547 $ 23,648 $ 12,195

Loans and Leases

Loans and Leases	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Loans and Leases	Loans and Leases The Company’s 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 all contractually required payments would be collected, are referred to collectively as non-purchased credit impaired loans, or "Non-PCI loans." Purchased loans for which there was, at the acquisition date, evidence of credit deterioration since their origination and for which it was deemed probable that we would be unable to collect all contractually required payments, are referred to as purchased credit impaired loans, or "PCI loans". 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 are recognized as an adjustment to interest income over the contractual life of the loans using the effective interest method or taken into income on an accelerated basis when the related loans are paid off or 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, 2016 December 31, 2015 Non-PCI Non-PCI Loans PCI Loans PCI and Leases Loans Total and Leases Loans Total (In thousands) Real estate mortgage $ 5,649,282 $ 160,122 $ 5,809,404 $ 5,706,903 $ 168,725 $ 5,875,628 Real estate construction and land 584,968 2,689 587,657 534,307 2,656 536,963 Commercial 8,021,092 13,513 8,034,605 7,977,067 17,415 7,994,482 Consumer 110,573 283 110,856 120,793 299 121,092 Total gross loans and leases 14,365,915 176,607 14,542,522 14,339,070 189,095 14,528,165 Deferred fees and costs (58,954 ) (51 ) (59,005 ) (49,861 ) (50 ) (49,911 ) Total loans and leases, net of deferred fees 14,306,961 176,556 14,483,517 14,289,209 189,045 14,478,254 Allowance for loan and lease losses (120,807 ) (9,554 ) (130,361 ) (105,534 ) (9,577 ) (115,111 ) Total net loans and leases $ 14,186,154 $ 167,002 $ 14,353,156 $ 14,183,675 $ 179,468 $ 14,363,143 Non‑Purchased Credit Impaired (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, 2016 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 16,655 $ 10,638 $ 27,293 $ 4,525,668 $ 4,552,961 Residential 2,187 559 2,746 1,074,590 1,077,336 Total real estate mortgage 18,842 11,197 30,039 5,600,258 5,630,297 Real estate construction and land: Commercial — — — 305,529 305,529 Residential — — — 269,944 269,944 Total real estate construction and land — — — 575,473 575,473 Commercial: Cash flow 766 2,013 2,779 3,163,035 3,165,814 Asset-based 4 — 4 2,588,912 2,588,916 Venture capital 9,554 — 9,554 1,493,057 1,502,611 Equipment finance 2,244 2,140 4,384 728,844 733,228 Total commercial 12,568 4,153 16,721 7,973,848 7,990,569 Consumer 30 708 738 109,884 110,622 Total Non-PCI loans and leases $ 31,440 $ 16,058 $ 47,498 $ 14,259,463 $ 14,306,961 December 31, 2015 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 3,947 $ 13,075 $ 17,022 $ 4,534,936 $ 4,551,958 Residential 3,391 905 4,296 1,131,809 1,136,105 Total real estate mortgage 7,338 13,980 21,318 5,666,745 5,688,063 Real estate construction and land: Commercial — — — 343,360 343,360 Residential — — — 184,360 184,360 Total real estate construction and land — — — 527,720 527,720 Commercial: Cash flow 2,048 1,427 3,475 3,058,793 3,062,268 Asset-based 1 — 1 2,547,532 2,547,533 Venture capital 250 700 950 1,451,477 1,452,427 Equipment finance 359 94 453 889,896 890,349 Total commercial 2,658 2,221 4,879 7,947,698 7,952,577 Consumer 626 1,307 1,933 118,916 120,849 Total Non-PCI loans and leases $ 10,622 $ 17,508 $ 28,130 $ 14,261,079 $ 14,289,209 It is the Company's policy to discontinue accruing interest 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 or 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. 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, 2016 December 31, 2015 Nonaccrual Performing Total Nonaccrual Performing Total (In thousands) Real estate mortgage: Commercial $ 30,357 $ 4,522,604 $ 4,552,961 $ 52,363 $ 4,499,595 $ 4,551,958 Residential 5,807 1,071,529 1,077,336 4,914 1,131,191 1,136,105 Total real estate mortgage 36,164 5,594,133 5,630,297 57,277 5,630,786 5,688,063 Real estate construction and land: Commercial — 305,529 305,529 — 343,360 343,360 Residential 370 269,574 269,944 372 183,988 184,360 Total real estate construction and land 370 575,103 575,473 372 527,348 527,720 Commercial: Cash flow 39,665 3,126,149 3,165,814 15,800 3,046,468 3,062,268 Asset-based 2,046 2,586,870 2,588,916 2,505 2,545,028 2,547,533 Venture capital — 1,502,611 1,502,611 124 1,452,303 1,452,427 Equipment finance 51,247 681,981 733,228 51,410 838,939 890,349 Total commercial 92,958 7,897,611 7,990,569 69,839 7,882,738 7,952,577 Consumer 926 109,696 110,622 1,531 119,318 120,849 Total Non-PCI loans and leases $ 130,418 $ 14,176,543 $ 14,306,961 $ 129,019 $ 14,160,190 $ 14,289,209 At March 31, 2016 , nonaccrual loans and leases totaled $130.4 million and included $13.5 million of loans and leases 90 or more days past due, $13.7 million of loans and leases 30 to 89 days past due, and $103.2 million of current loans and leases that were placed on nonaccrual status based on management’s judgment regarding their collectability. Nonaccrual loans and leases totaled $129.0 million at December 31, 2015 , including $16.8 million of the loans and leases 90 or more days past due, $3.6 million of loans and leases 30 to 89 days past due, and $108.6 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, 2016 December 31, 2015 Classified Nonclassified Total Classified Nonclassified Total (In thousands) Real estate mortgage: Commercial $ 65,532 $ 4,487,429 $ 4,552,961 $ 98,436 $ 4,453,522 $ 4,551,958 Residential 18,361 1,058,975 1,077,336 12,627 1,123,478 1,136,105 Total real estate mortgage 83,893 5,546,404 5,630,297 111,063 5,577,000 5,688,063 Real estate construction and land: Commercial 558 304,971 305,529 571 342,789 343,360 Residential 1,382 268,562 269,944 1,395 182,965 184,360 Total real estate construction and land 1,940 573,533 575,473 1,966 525,754 527,720 Commercial: Cash flow 209,108 2,956,706 3,165,814 183,726 2,878,542 3,062,268 Asset-based 22,236 2,566,680 2,588,916 19,340 2,528,193 2,547,533 Venture capital 14,889 1,487,722 1,502,611 19,105 1,433,322 1,452,427 Equipment finance 51,247 681,981 733,228 54,054 836,295 890,349 Total commercial 297,480 7,693,089 7,990,569 276,225 7,676,352 7,952,577 Consumer 1,385 109,237 110,622 2,500 118,349 120,849 Total Non-PCI loans and leases $ 384,698 $ 13,922,263 $ 14,306,961 $ 391,754 $ 13,897,455 $ 14,289,209 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 higher allowances for credit losses. Non‑PCI nonaccrual loans and leases and performing troubled debt restructured loans are considered impaired for reporting purposes. The following table presents the composition of our impaired loans and leases as of the dates indicated: March 31, 2016 December 31, 2015 Performing Total Performing Total Nonaccrual Restructured Impaired Nonaccrual Restructured Impaired Loans/Leases Loans Loans/Leases Loans/Leases Loans Loans/Leases (In thousands) Real estate mortgage $ 36,164 $ 55,124 $ 91,288 $ 57,277 $ 27,133 $ 84,410 Real estate construction and land 370 7,575 7,945 372 7,631 8,003 Commercial 92,958 3,901 96,859 69,839 5,221 75,060 Consumer 926 229 1,155 1,531 197 1,728 Total $ 130,418 $ 66,829 $ 197,247 $ 129,019 $ 40,182 $ 169,201 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, 2016 December 31, 2015 Unpaid Unpaid Recorded Principal Related Recorded Principal Related Investment Balance Allowance Investment Balance Allowance (In thousands) With An Allowance Recorded: Real estate mortgage: Commercial $ 25,440 $ 26,632 $ 1,206 $ 17,967 $ 19,219 $ 777 Residential 4,198 4,352 748 2,278 2,435 681 Real estate construction and land: Residential 743 743 21 747 747 26 Commercial: Cash flow 37,894 44,786 9,965 14,072 20,312 7,079 Asset-based 3,696 4,250 1,973 3,901 4,423 2,511 Equipment finance 51,247 58,862 15,964 11,193 11,894 8,032 Consumer 359 365 163 365 372 157 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 55,460 $ 65,094 $ 58,678 $ 68,333 Residential 6,190 12,347 5,487 11,406 Real estate construction and land: Commercial 7,202 7,197 7,256 7,256 Commercial: Cash flow 2,841 5,188 2,825 5,121 Asset-based 1,181 1,176 2,729 2,726 Venture capital — — 124 125 Equipment finance — — 40,216 44,194 Consumer 796 1,904 1,363 1,945 Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 91,288 $ 108,425 $ 1,954 $ 84,410 $ 101,393 $ 1,458 Real estate construction and land 7,945 7,940 21 8,003 8,003 26 Commercial 96,859 114,262 27,902 75,060 88,795 17,622 Consumer 1,155 2,269 163 1,728 2,317 157 Total $ 197,247 $ 232,896 $ 30,040 $ 169,201 $ 200,508 $ 19,263 Three Months Ended March 31, 2016 2015 Weighted Interest Weighted Interest Average Income Average Income Balance (1) Recognized Balance (1) Recognized (In thousands) With An Allowance Recorded: Real estate mortgage: Commercial $ 19,471 $ 243 $ 11,917 $ 148 Residential 4,198 24 2,796 7 Real estate construction and land: Commercial — — 403 5 Residential 743 4 759 4 Commercial: Cash flow 20,823 12 16,028 11 Asset-based 3,696 27 4,693 33 Equipment finance 49,322 — 4,581 — Consumer 341 3 383 4 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 54,132 $ 217 $ 36,704 $ 74 Residential 5,405 14 5,187 6 Real estate construction and land: Commercial 7,202 62 7,457 271 Residential — — 20 — Commercial: Cash flow 2,683 1 3,845 46 Asset-based 1,181 15 7,435 48 Equipment finance — — 7,537 — Consumer 797 — 3,345 — Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 83,206 $ 498 $ 56,604 $ 235 Real estate construction and land 7,945 66 8,639 280 Commercial 77,705 55 44,119 138 Consumer 1,138 3 3,728 4 Total $ 169,994 $ 622 $ 113,090 $ 657 _________________________ (1) For Non-PCI loans and leases reported as impaired at March 31, 2016 and 2015 , amounts were calculated based on the period of time such loans and leases were impaired during the reported period. Troubled debt restructurings are a result of rate reductions, term extensions, fee concessions, and debt forgiveness or a combination thereof. The following tables present new troubled debt restructurings of Non-PCI loans for the periods indicated: Three Months Ended March 31, 2016 2015 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 4 $ 3,140 $ 3,140 9 $ 5,161 $ 5,113 Residential 1 165 165 5 913 773 Real estate construction and land: Commercial — — — 1 2,610 2,610 Commercial: Cash flow 4 257 257 4 761 582 Asset-based 2 629 629 6 1,399 1,399 Equipment finance 2 2,660 2,660 4 4,133 4,133 Consumer 1 60 60 1 91 91 Total 14 $ 6,911 $ 6,911 30 $ 15,068 $ 14,701 The following tables present troubled debt restructurings that subsequently defaulted for the periods indicated: Three Months Ended March 31, 2016 2015 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 1 $ 1,511 Residential — — 1 8 Commercial - Asset-based — — 1 385 Total 1 $ 230 (2) 3 $ 1,904 (3) _________________________ (1) The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. 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, 2016 , and there were no charge-offs. (3) Represents the balance at March 31, 2015 , and is net of charge-offs of $772,000 . 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, 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 Amount of the allowance applicable to loans and leases: 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 The ending balance of the loan and lease portfolio is composed of loans and leases: 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 of loans and leases $ 5,630,297 $ 575,473 $ 7,990,569 $ 110,622 $ 14,306,961 $ 176,556 $ 14,483,517 Three Months Ended March 31, 2015 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 $ 25,097 $ 4,248 $ 39,858 $ 1,253 $ 70,456 $ 13,999 $ 84,455 Charge-offs (1,453 ) — (8,395 ) (63 ) (9,911 ) (579 ) (10,490 ) Recoveries 1,295 632 410 194 2,531 11 2,542 Provision (negative provision) 5,972 (2,707 ) 13,921 (582 ) 16,604 (733 ) 15,871 Balance, end of period $ 30,911 $ 2,173 $ 45,794 $ 802 $ 79,680 $ 12,698 $ 92,378 Amount of the allowance applicable to loans and leases: Individually evaluated for impairment $ 1,500 $ 55 $ 10,493 $ 178 $ 12,226 Collectively evaluated for impairment $ 29,411 $ 2,118 $ 35,301 $ 624 $ 67,454 Acquired loans with deteriorated credit quality $ 12,698 The ending balance of the loan and lease portfolio is composed of loans and leases: Individually evaluated for impairment $ 59,733 $ 8,639 $ 103,208 $ 3,729 $ 175,309 Collectively evaluated for impairment $ 5,528,697 $ 320,070 $ 5,903,859 $ 89,946 $ 11,842,572 Acquired loans with deteriorated credit quality $ 254,285 Ending balance of loans and leases $ 5,588,430 $ 328,709 $ 6,007,067 $ 93,675 $ 12,017,881 $ 254,285 $ 12,272,166

Foreclosed Assets

Foreclosed Assets	3 Months Ended
	Mar. 31, 2016
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: 2016 2015 (In thousands) Commercial real estate $ — $ 487 Construction and land development 13,800 13,801 Single family residence 897 952 Total other real estate owned, net 14,697 15,240 Other foreclosed assets 3,613 6,880 Total foreclosed assets, net $ 18,310 $ 22,120 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, 2015 $ 22,120 Foreclosures 129 Provision for losses — Reductions related to sales (3,939 ) Balance, March 31, 2016 $ 18,310

Borrowings and Subordinated Deb

Borrowings and Subordinated Debentures	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Borrowings, Subordinated Debentures and Brokered Deposit	Borrowings and Subordinated Debentures Borrowings The following table summarizes our borrowings as of the dates indicated: March 31, 2016 December 31, 2015 Amount Rate Amount Rate (Dollars in thousands) Non‑recourse debt $ 1,401 6.20 % $ 3,914 5.49 % FHLB overnight advances 550,000 0.48 % 618,000 0.27 % Total borrowings $ 551,401 $ 621,914 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, 2016 , this debt had a weighted average remaining maturity of 2.3 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 Federal Reserve Bank of San Francisco (“FRBSF”), and other financial institutions. FHLB Secured Lines of Credit. The borrowing arrangement with the FHLB is based on an FHLB program collateralized by a blanket lien on certain qualifying loans that are not pledged to the FRBSF. As of March 31, 2016 , the borrowing capacity under the FHLB secured borrowing lines was $2.3 billion . As of March 31, 2016 and December 31, 2015 , the balances outstanding were $550.0 million and $618.0 million . FRBSF Secured Line of Credit. The Bank has a secured line of credit with the FRBSF. As of March 31, 2016 , the Bank had secured borrowing capacity of $2.1 billion collateralized by liens covering $3.0 billion of certain qualifying loans. As of March 31, 2016 and December 31, 2015 , there were no balances outstanding. Federal Funds Arrangements with Commercial Banks. As of March 31, 2016 , the Bank had uncommitted 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, 2016 and December 31, 2015 , there were no balances outstanding. In March 2016, the Bank became a member of the American Financial Exchange, through which it may either borrow or lend funds on an overnight basis with a group of pre-approved commercial banks. The availability of funds changes daily. There were no balances outstanding as of March 31, 2016. FHLB Unsecured Line of Credit. During the second quarter of 2015, the Bank obtained a $99.0 million unsecured line of credit with the FHLB for the purchase of overnight funds. As of March 31, 2016 and December 31, 2015, there were no balances outstanding. Subordinated Debentures The following table summarizes the terms of each issuance of subordinated debentures outstanding as of the dates indicated: March 31, 2016 December 31, 2015 Date Maturity Rate Index Series: Amount Rate Amount Rate Issued Date (Quarterly Reset) (Dollars in thousands) Trust V $ 10,310 3.74 % $ 10,310 3.63 % 8/15/2003 9/17/2033 3 month LIBOR + 3.10 Trust VI 10,310 3.68 % 10,310 3.39 % 9/3/2003 9/15/2033 3 month LIBOR + 3.05 Trust CII 5,155 3.59 % 5,155 3.35 % 9/17/2003 9/17/2033 3 month LIBOR + 2.95 Trust VII 61,856 3.37 % 61,856 3.07 % 2/5/2004 4/23/2034 3 month LIBOR + 2.75 Trust CIII 20,619 2.32 % 20,619 2.20 % 8/15/2005 9/15/2035 3 month LIBOR + 1.69 Trust FCCI 16,495 2.23 % 16,495 2.11 % 1/25/2007 3/15/2037 3 month LIBOR + 1.60 Trust FCBI 10,310 2.18 % 10,310 2.06 % 9/30/2005 12/15/2035 3 month LIBOR + 1.55 Trust CS 2005-1 82,475 2.58 % 82,475 2.46 % 11/21/2005 12/15/2035 3 month LIBOR + 1.95 Trust CS 2005-2 128,866 2.57 % 128,866 2.27 % 12/14/2005 1/30/2036 3 month LIBOR + 1.95 Trust CS 2006-1 51,545 2.57 % 51,545 2.27 % 2/22/2006 4/30/2036 3 month LIBOR + 1.95 Trust CS 2006-2 51,550 2.57 % 51,550 2.27 % 9/27/2006 10/30/2036 3 month LIBOR + 1.95 Trust CS 2006-3 (1) 29,335 1.88 % 28,007 1.98 % 9/29/2006 10/30/2036 3 month EURIBOR + 2.05 Trust CS 2006-4 16,470 2.57 % 16,470 2.27 % 12/5/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2006-5 6,650 2.57 % 6,650 2.27 % 12/19/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2007-2 39,177 2.57 % 39,177 2.27 % 6/13/2007 7/30/2037 3 month LIBOR + 1.95 Gross subordinated debentures 541,123 539,795 Unamortized discount (2) (102,400 ) (103,795 ) Net subordinated debentures $ 438,723 $ 436,000 ___________________ (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 the Board of Governors of the Federal Reserve System (“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, 2016
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, standby letters of credit, and commitments to purchase equipment being acquired for lease to others. 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, 2016 2015 (In thousands) Loan commitments to extend credit $ 3,812,544 $ 3,580,655 Standby letters of credit 217,610 210,292 Commitments to purchase equipment being acquired for lease to others — 6,663 $ 4,030,154 $ 3,797,610 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, 2016 and December 31, 2015 , we had commitments to contribute capital to these entities totaling $21.5 million and $19.2 million . We also had commitments to contribute up to an additional $2.9 million and $2.8 million to 19 and 11 private equity funds at March 31, 2016 and December 31, 2015 . 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 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, 2016
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, government agency and government‑sponsored enterprise securities, collateralized loan obligations, registered publicly rated private label collateralized mortgage obligations ("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 covered private label CMOs, non-rated private placement private label CMOs, non-rated private placement 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, core deposit intangibles, and other long‑lived assets. The following tables present information on the assets measured and recorded at fair value on a recurring basis as of the dates indicated: Fair Value Measurements as of March 31, 2016 Measured on a Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Government agency and government‑sponsored enterprise pass-through securities $ 653,865 $ — $ 653,865 $ — Government agency and government‑sponsored enterprise collateralized mortgage obligations 443,732 — 443,732 — Covered private label CMOs 27,863 — — 27,863 Other private label CMOs 107,382 — 60,030 47,352 Municipal securities 1,517,592 — 1,517,592 — Corporate debt securities 45,483 — 45,483 — Collateralized loan obligations 139,572 — 139,572 — SBA securities 202,674 — 202,674 — Asset-backed and other securities 102,423 2,551 83,156 16,716 Total securities available-for-sale 3,240,586 2,551 3,146,104 91,931 Derivative assets 6,654 — 6,654 — Equity warrants 5,033 — — 5,033 Total recurring assets $ 3,252,273 $ 2,551 $ 3,152,758 $ 96,964 Derivative liabilities $ 2,079 $ — $ 2,079 $ — Fair Value Measurements as of December 31, 2015 Measured on a Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Government agency and government‑sponsored enterprise pass-through securities $ 767,797 $ — $ 767,797 $ — Government agency and government‑sponsored enterprise collateralized mortgage obligations 486,239 — 486,239 — Covered private label CMOs 29,782 — — 29,782 Other private label CMOs 115,014 — 63,555 51,459 Municipal securities 1,547,331 — 1,547,331 — US Treasury securities 69,380 69,380 — — Corporate debt securities 48,424 — 48,424 — Collateralized loan obligations 132,189 — 132,189 — SBA securities 211,157 — 211,157 — Government‑sponsored enterprise debt securities 36,913 — 36,913 — Asset-backed and other securities 115,211 2,562 94,449 18,200 Total securities available-for-sale 3,559,437 71,942 3,388,054 99,441 Derivative assets 11,919 — 11,919 — Equity warrants 4,914 — — 4,914 Total recurring assets $ 3,576,270 $ 71,942 $ 3,399,973 $ 104,355 Derivative liabilities $ 1,397 $ — $ 1,397 $ — There were no transfers of assets either between Level 1 and Level 2 nor in or out of Level 3 of the fair value hierarchy for assets measured on a recurring basis during the three months ended March 31, 2016 . 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 March 31, 2016 : Private Label CMOs Asset-Backed Securities Weighted Weighted Range Average Range Average Unobservable Inputs: of Inputs Input of Inputs Input Voluntary annual prepayment speeds 1.5% - 22.4% 10.5% 5% - 40% 14.2% Annual default rates 0.3% - 13.7% 2.4% 1% - 8% 3.7% Loss severity rates 0% - 96.9% 32.6% 10% - 91% 51.8% Discount rates 0.8% - 57.3% 3.8% 1.8% - 5.2% 3.4% 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 March 31, 2016 : Equity Warrants Weighted Average Unobservable Inputs: Range of Inputs Volatility 18.7% - 161.5% Risk-free interest rate 0.7% - 1.0% Remaining life assumption (in years) 2.0 - 3.7 The following table summarizes activity for our Level 3 private label CMOs and asset-backed securities available-for-sale measured at fair value on a recurring basis for the period indicated: Private Asset-Backed Label CMOs Securities (In thousands) Balance, December 31, 2015 $ 81,241 $ 18,200 Total included in earnings 353 15 Total included in other comprehensive income (1,251 ) (12 ) Net settlements (5,128 ) (1,487 ) Balance, March 31, 2016 $ 75,215 $ 16,716 The following table summarizes activity for our Level 3 equity warrants measured at fair value on a recurring basis for the period indicated: Equity Warrants (In thousands) Balance, December 31, 2015 $ 4,914 Total included in earnings (274 ) Sales (42 ) Issuances 435 Balance, March 31, 2016 $ 5,033 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, 2016 Measured on a Non‑Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 95,310 $ — $ 2,121 $ 93,189 Fair Value Measurement as of December 31, 2015 Measured on a Non‑Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 40,817 $ — $ 9,367 $ 31,450 Other real estate owned 14,101 — 14,101 — Investments carried at cost 107 — — 107 Total non-recurring $ 55,025 $ — $ 23,468 $ 31,557 The following table presents losses recognized on assets measured on a nonrecurring basis for the periods indicated: Three Months Ended March 31, Losses on Assets Measured on a Non‑Recurring Basis: 2016 2015 (In thousands) Impaired Non‑PCI loans $ (12,909 ) $ (9,192 ) Other real estate owned — (124 ) Total loss $ (12,909 ) $ (9,316 ) The following table presents the valuation methodology and unobservable inputs for Level 3 assets measured at fair value on a nonrecurring basis as of March 31, 2016 : Valuation Unobservable Weighted Asset: Fair Value Technique Inputs Range Average (In thousands) Impaired Non-PCI loans $ 52,516 Discounted cash flows Discount rates 0% - 9.04% 6.33% Impaired Non-PCI loans 38,910 Third party appraisals Discounts 10.00% - 28.44% 25.25% Impaired Non-PCI loans 1,763 Third party appraisals No discounts Total non-recurring Level 3 $ 93,189 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, 2016 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 161,977 $ 161,977 $ 161,977 $ — $ — Interest‑earning deposits in financial institutions 357,541 357,541 357,541 — — Securities available‑for‑sale 3,240,586 3,240,586 2,551 3,146,104 91,931 Investment in FHLB stock 17,250 17,250 — 17,250 — Investments carried at cost 1,990 4,950 — — 4,950 Loans and leases, net 14,353,156 14,337,455 — 2,121 14,335,334 Derivative assets 6,654 6,654 — 6,654 — Equity warrants 5,033 5,033 — — 5,033 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 11,956,102 11,956,102 — 11,956,102 — Time deposits 3,485,273 3,484,782 — 3,484,782 — Borrowings 551,401 551,401 550,000 1,401 — Subordinated debentures 438,723 421,669 — 421,669 — Derivative liabilities 2,079 2,079 — 2,079 — December 31, 2015 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 161,020 $ 161,020 $ 161,020 $ — $ — Interest‑earning deposits in financial institutions 235,466 235,466 235,466 — — Securities available‑for‑sale 3,559,437 3,559,437 71,942 3,388,054 99,441 Investment in FHLB stock 19,710 19,710 — 19,710 — Investments carried at cost 2,267 6,789 — — 6,789 Loans and leases, net 14,363,143 14,393,558 — 9,367 14,384,191 Derivative assets 11,919 11,919 — 11,919 — Equity warrants 4,914 4,914 — — 4,914 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 11,513,826 11,513,826 — 11,513,826 — Time deposits 4,152,356 4,152,920 — 4,152,920 — Borrowings 621,914 622,438 618,000 4,438 — Subordinated debentures 436,000 419,762 — 419,762 — Derivative liabilities 1,397 1,397 — 1,397 — 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 2015 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, 2016 , 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, 2016
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, 2016 2015 2015 (Dollars in thousands, except per share data) Basic Earnings Per Share: Net earnings $ 90,456 $ 71,841 $ 73,079 Less: Earnings allocated to unvested restricted stock (1) (1,067 ) (690 ) (819 ) Net earnings allocated to common shares $ 89,389 $ 71,151 $ 72,260 Weighted-average basic shares and unvested restricted stock outstanding 121,598 120,385 103,035 Less: Weighted-average unvested restricted stock outstanding (1,392 ) (1,133 ) (1,122 ) Weighted-average basic shares outstanding 120,206 119,252 101,913 Basic earnings per share $ 0.74 $ 0.60 $ 0.71 Diluted Earnings Per Share: Net earnings allocated to common shares $ 89,389 $ 71,151 $ 72,260 Weighted-average basic shares outstanding 120,206 119,252 101,913 Diluted earnings per share $ 0.74 $ 0.60 $ 0.71 ________________________ (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, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock-Based Compensation The Company’s 2003 Stock Incentive Plan, or the 2003 Plan, permits stock-based compensation awards to officers, directors, key employees and consultants. As of March 31, 2016 , 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, 2016 , there were 12,616,206 shares available for grant under the 2003 Plan. Restricted stock amortization totaled $5.0 million , $3.8 million , and $3.1 million for the three months ended March 31, 2016 , December 31, 2015 and March 31, 2015 . Such amounts are included in "Compensation expense" on the condensed consolidated statements of earnings. The amount of unrecognized compensation expense related to unvested time-based restricted stock awards ("TRSAs") and performance-based restricted stock units ("PRSUs") as of March 31, 2016 totaled $51.8 million . Time-Based Restricted Stock Awards At March 31, 2016 , there were 1,562,557 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 the 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, 2016, there were 153,715 shares 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. 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.

Recently Issued Accounting Stan

Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2016
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	Recently Issued Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("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. The Company is evaluating the effect that ASU 2014-09 will have on its financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting. 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. Early application is not permitted. 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 recognized 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. The Company is evaluating the effect that ASU 2016-01 will have on its financial statements and related disclosures. 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. ASU 2016-02 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 March 2016, the FASB issued ASU 2016-07, Simplifying the Transition to the Equity Method of Accounting , which eliminates the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. ASU 2016-07 is effective for interim and annual periods in fiscal years beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Earlier application is permitted. ASU 2016-07 does not require additional disclosures at transition. The Company does not expect the effect of ASU 2016-06 to have a material impact on its financial statements and related disclosures. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting , which is intended to improve the accounting for share-based payment transactions as part of the FASB’s simplification initiative. ASU 2016-09 changes 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. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those years. Early adoption is permitted in any interim or annual period provided that the entire ASU is adopted. If an entity early adopts the amendments after the first interim period, the adoption date is as of the beginning of the year for the issues adopted by the cumulative-effect and prospective methods and any adjustments to previously reported interim periods of that fiscal year should be included in the year-to-date results. If those previously reported interim results appear in any future filings, they are reported on the revised basis. The Company does not expect the effect of ASU 2016-09 to have a material impact on its financial statements and related disclosures in the period of adoption. In subsequent periods, 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.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Common Stock Dividends On May 2, 2016 , 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, 2016 to stockholders of record at the close of business on May 16, 2016 . We have evaluated events that have occurred subsequent to March 31, 2016 and have concluded there are no other subsequent events that would require recognition in the accompanying consolidated financial statements.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Business Acquisition, Integration, Restructuring and Other Related Costs	The costs shown for the three months ended March 31, 2016 and December 31, 2015 relate to the Square 1 acquisition and ongoing systems integration. The following table presents the components of acquisition, integration and reorganization costs for the periods indicated: Three Months Ended March 31, December 31, March 31, 2016 2015 2015 (In thousands) Acquisition, Integration and Reorganization Costs: Severance and employee-related $ — $ 10,500 $ — System conversion and integration 200 3,802 — Asset write-downs, lease terminations and other facilities-related — 125 — Investment banking deal costs — — 1,050 Other (legal, accounting, insurance, consulting) — 3,173 950 Total acquisition, integration and reorganization costs $ 200 $ 17,600 $ 2,000

Goodwill and Other Intangible22

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Disclosure	The following table presents the changes in the carrying amount of goodwill for the period indicated: Goodwill (In thousands) Balance, December 31, 2015 $ 2,176,291 Reduction due to sale of PWEF leasing unit (500 ) Balance, March 31, 2016 $ 2,175,791
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, 2016 2015 2015 (In thousands) Gross Amount of CDI and CRI: Balance, beginning of period $ 95,524 $ 53,090 $ 53,090 Additions — 45,426 — Fully amortized portion — (2,992 ) — Reduction due to sale of PWEF leasing unit (1,700 ) — — Balance, end of period 93,824 95,524 53,090 Accumulated Amortization: Balance, beginning of period (42,304 ) (40,386 ) (35,886 ) Amortization (4,746 ) (4,910 ) (1,501 ) Fully amortized portion — 2,992 — Reduction due to sale of PWEF leasing unit 1,363 — — Balance, end of period (45,687 ) (42,304 ) (37,387 ) Net CDI and CRI, end of period $ 48,137 $ 53,220 $ 15,703

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2016
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 carrying values of securities available-for-sale as of the dates indicated: March 31, 2016 December 31, 2015 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 mortgage-backed securities: Government agency and government-sponsored enterprise pass-through securities $ 642,233 $ 12,865 $ (1,233 ) $ 653,865 $ 759,881 $ 12,075 $ (4,159 ) $ 767,797 Government agency and government-sponsored enterprise collateralized mortgage obligations 431,456 12,515 (239 ) 443,732 486,065 3,584 (3,410 ) 486,239 Covered private label collateralized mortgage obligations 23,026 5,064 (227 ) 27,863 24,113 5,794 (125 ) 29,782 Other private label collateralized mortgage obligations 108,019 246 (883 ) 107,382 115,952 43 (981 ) 115,014 Municipal securities 1,457,795 59,886 (89 ) 1,517,592 1,508,968 39,435 (1,072 ) 1,547,331 US Treasury securities — — — — 70,196 — (816 ) 69,380 Corporate debt securities 47,269 303 (2,089 ) 45,483 49,047 327 (950 ) 48,424 Collateralized loan obligations 142,637 42 (3,107 ) 139,572 133,192 128 (1,131 ) 132,189 SBA securities 201,934 947 (207 ) 202,674 211,946 41 (830 ) 211,157 Government-sponsored enterprise debt securities — — — — 36,302 611 — 36,913 Asset-backed and other securities 104,182 135 (1,894 ) 102,423 116,723 119 (1,631 ) 115,211 Total $ 3,158,551 $ 92,003 $ (9,968 ) $ 3,240,586 $ 3,512,385 $ 62,157 $ (15,105 ) $ 3,559,437
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, 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 mortgage-backed securities: Government agency and government- sponsored enterprise pass-through securities $ 196,388 $ (1,135 ) $ 9,422 $ (98 ) $ 205,810 $ (1,233 ) Government agency and government- sponsored enterprise collateralized mortgage obligations 33,702 (239 ) — — 33,702 (239 ) Covered private label collateralized mortgage obligations 1,239 (98 ) 849 (129 ) 2,088 (227 ) Other private label collateralized mortgage obligations 59,407 (838 ) 1,029 (45 ) 60,436 (883 ) Municipal securities 18,108 (55 ) 5,496 (34 ) 23,604 (89 ) Corporate debt securities 28,180 (2,089 ) — — 28,180 (2,089 ) Collateralized loan obligations 106,773 (2,121 ) 23,355 (986 ) 130,128 (3,107 ) SBA securities 87,150 (207 ) — — 87,150 (207 ) Asset-backed and other securities 64,013 (1,285 ) 15,923 (609 ) 79,936 (1,894 ) Total $ 594,960 $ (8,067 ) $ 56,074 $ (1,901 ) $ 651,034 $ (9,968 ) December 31, 2015 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 mortgage-backed securities: Government agency and government- sponsored enterprise pass-through securities $ 391,642 $ (3,893 ) $ 9,342 $ (266 ) $ 400,984 $ (4,159 ) Government agency and government- sponsored enterprise collateralized mortgage obligations 314,284 (2,769 ) 14,230 (641 ) 328,514 (3,410 ) Covered private label collateralized mortgage obligations 1,354 (57 ) 568 (68 ) 1,922 (125 ) Other private label collateralized mortgage obligations 92,179 (943 ) 1,070 (38 ) 93,249 (981 ) Municipal securities 126,892 (1,061 ) 531 (11 ) 127,423 (1,072 ) US Treasury securities 69,380 (816 ) — — 69,380 (816 ) Corporate debt securities 29,379 (950 ) — — 29,379 (950 ) Collateralized loan obligations 100,993 (1,131 ) — — 100,993 (1,131 ) SBA securities 179,942 (830 ) — — 179,942 (830 ) Asset-backed and other securities 71,619 (1,182 ) 16,091 (449 ) 87,710 (1,631 ) Total $ 1,377,664 $ (13,632 ) $ 41,832 $ (1,473 ) $ 1,419,496 $ (15,105 )
Investments Classified by Contractual Maturity Date	The following table presents the contractual maturities of our available-for-sale securities portfolio based on amortized cost and carrying value as of the date indicated: March 31, 2016 Amortized Fair Maturity: Cost Value (In thousands) Due in one year or less $ 12,821 $ 12,628 Due after one year through five years 216,420 219,110 Due after five years through ten years 603,523 619,214 Due after ten years 2,325,787 2,389,634 Total securities available-for-sale $ 3,158,551 $ 3,240,586
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, 2016 2015 2015 (In thousands) Taxable interest $ 11,396 $ 12,730 $ 7,473 Non-taxable interest 10,726 10,459 3,894 Dividend income 425 459 828 Total interest income on investment securities $ 22,547 $ 23,648 $ 12,195

Loans and Leases (Tables)

Loans and Leases (Tables)	3 Months Ended
	Mar. 31, 2016
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, 2016 December 31, 2015 Non-PCI Non-PCI Loans PCI Loans PCI and Leases Loans Total and Leases Loans Total (In thousands) Real estate mortgage $ 5,649,282 $ 160,122 $ 5,809,404 $ 5,706,903 $ 168,725 $ 5,875,628 Real estate construction and land 584,968 2,689 587,657 534,307 2,656 536,963 Commercial 8,021,092 13,513 8,034,605 7,977,067 17,415 7,994,482 Consumer 110,573 283 110,856 120,793 299 121,092 Total gross loans and leases 14,365,915 176,607 14,542,522 14,339,070 189,095 14,528,165 Deferred fees and costs (58,954 ) (51 ) (59,005 ) (49,861 ) (50 ) (49,911 ) Total loans and leases, net of deferred fees 14,306,961 176,556 14,483,517 14,289,209 189,045 14,478,254 Allowance for loan and lease losses (120,807 ) (9,554 ) (130,361 ) (105,534 ) (9,577 ) (115,111 ) Total net loans and leases $ 14,186,154 $ 167,002 $ 14,353,156 $ 14,183,675 $ 179,468 $ 14,363,143
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, 2016 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 16,655 $ 10,638 $ 27,293 $ 4,525,668 $ 4,552,961 Residential 2,187 559 2,746 1,074,590 1,077,336 Total real estate mortgage 18,842 11,197 30,039 5,600,258 5,630,297 Real estate construction and land: Commercial — — — 305,529 305,529 Residential — — — 269,944 269,944 Total real estate construction and land — — — 575,473 575,473 Commercial: Cash flow 766 2,013 2,779 3,163,035 3,165,814 Asset-based 4 — 4 2,588,912 2,588,916 Venture capital 9,554 — 9,554 1,493,057 1,502,611 Equipment finance 2,244 2,140 4,384 728,844 733,228 Total commercial 12,568 4,153 16,721 7,973,848 7,990,569 Consumer 30 708 738 109,884 110,622 Total Non-PCI loans and leases $ 31,440 $ 16,058 $ 47,498 $ 14,259,463 $ 14,306,961 December 31, 2015 30 - 89 90 or More Days Days Total Past Due Past Due Past Due Current Total (In thousands) Real estate mortgage: Commercial $ 3,947 $ 13,075 $ 17,022 $ 4,534,936 $ 4,551,958 Residential 3,391 905 4,296 1,131,809 1,136,105 Total real estate mortgage 7,338 13,980 21,318 5,666,745 5,688,063 Real estate construction and land: Commercial — — — 343,360 343,360 Residential — — — 184,360 184,360 Total real estate construction and land — — — 527,720 527,720 Commercial: Cash flow 2,048 1,427 3,475 3,058,793 3,062,268 Asset-based 1 — 1 2,547,532 2,547,533 Venture capital 250 700 950 1,451,477 1,452,427 Equipment finance 359 94 453 889,896 890,349 Total commercial 2,658 2,221 4,879 7,947,698 7,952,577 Consumer 626 1,307 1,933 118,916 120,849 Total Non-PCI loans and leases $ 10,622 $ 17,508 $ 28,130 $ 14,261,079 $ 14,289,209
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, 2016 December 31, 2015 Performing Total Performing Total Nonaccrual Restructured Impaired Nonaccrual Restructured Impaired Loans/Leases Loans Loans/Leases Loans/Leases Loans Loans/Leases (In thousands) Real estate mortgage $ 36,164 $ 55,124 $ 91,288 $ 57,277 $ 27,133 $ 84,410 Real estate construction and land 370 7,575 7,945 372 7,631 8,003 Commercial 92,958 3,901 96,859 69,839 5,221 75,060 Consumer 926 229 1,155 1,531 197 1,728 Total $ 130,418 $ 66,829 $ 197,247 $ 129,019 $ 40,182 $ 169,201 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, 2016 December 31, 2015 Nonaccrual Performing Total Nonaccrual Performing Total (In thousands) Real estate mortgage: Commercial $ 30,357 $ 4,522,604 $ 4,552,961 $ 52,363 $ 4,499,595 $ 4,551,958 Residential 5,807 1,071,529 1,077,336 4,914 1,131,191 1,136,105 Total real estate mortgage 36,164 5,594,133 5,630,297 57,277 5,630,786 5,688,063 Real estate construction and land: Commercial — 305,529 305,529 — 343,360 343,360 Residential 370 269,574 269,944 372 183,988 184,360 Total real estate construction and land 370 575,103 575,473 372 527,348 527,720 Commercial: Cash flow 39,665 3,126,149 3,165,814 15,800 3,046,468 3,062,268 Asset-based 2,046 2,586,870 2,588,916 2,505 2,545,028 2,547,533 Venture capital — 1,502,611 1,502,611 124 1,452,303 1,452,427 Equipment finance 51,247 681,981 733,228 51,410 838,939 890,349 Total commercial 92,958 7,897,611 7,990,569 69,839 7,882,738 7,952,577 Consumer 926 109,696 110,622 1,531 119,318 120,849 Total Non-PCI loans and leases $ 130,418 $ 14,176,543 $ 14,306,961 $ 129,019 $ 14,160,190 $ 14,289,209
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, 2016 December 31, 2015 Classified Nonclassified Total Classified Nonclassified Total (In thousands) Real estate mortgage: Commercial $ 65,532 $ 4,487,429 $ 4,552,961 $ 98,436 $ 4,453,522 $ 4,551,958 Residential 18,361 1,058,975 1,077,336 12,627 1,123,478 1,136,105 Total real estate mortgage 83,893 5,546,404 5,630,297 111,063 5,577,000 5,688,063 Real estate construction and land: Commercial 558 304,971 305,529 571 342,789 343,360 Residential 1,382 268,562 269,944 1,395 182,965 184,360 Total real estate construction and land 1,940 573,533 575,473 1,966 525,754 527,720 Commercial: Cash flow 209,108 2,956,706 3,165,814 183,726 2,878,542 3,062,268 Asset-based 22,236 2,566,680 2,588,916 19,340 2,528,193 2,547,533 Venture capital 14,889 1,487,722 1,502,611 19,105 1,433,322 1,452,427 Equipment finance 51,247 681,981 733,228 54,054 836,295 890,349 Total commercial 297,480 7,693,089 7,990,569 276,225 7,676,352 7,952,577 Consumer 1,385 109,237 110,622 2,500 118,349 120,849 Total Non-PCI loans and leases $ 384,698 $ 13,922,263 $ 14,306,961 $ 391,754 $ 13,897,455 $ 14,289,209
Troubled Debt Restructurings on Financing Receivables	The following tables present new troubled debt restructurings of Non-PCI loans for the periods indicated: Three Months Ended March 31, 2016 2015 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 4 $ 3,140 $ 3,140 9 $ 5,161 $ 5,113 Residential 1 165 165 5 913 773 Real estate construction and land: Commercial — — — 1 2,610 2,610 Commercial: Cash flow 4 257 257 4 761 582 Asset-based 2 629 629 6 1,399 1,399 Equipment finance 2 2,660 2,660 4 4,133 4,133 Consumer 1 60 60 1 91 91 Total 14 $ 6,911 $ 6,911 30 $ 15,068 $ 14,701
Subsequently Defaulted Trouble Debt Restructurings	The following tables present troubled debt restructurings that subsequently defaulted for the periods indicated: Three Months Ended March 31, 2016 2015 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 1 $ 1,511 Residential — — 1 8 Commercial - Asset-based — — 1 385 Total 1 $ 230 (2) 3 $ 1,904 (3) _________________________ (1) The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. 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, 2016 , and there were no charge-offs. (3) Represents the balance at March 31, 2015 , and is net of charge-offs of $772,000 .
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period	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, 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 Amount of the allowance applicable to loans and leases: 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 The ending balance of the loan and lease portfolio is composed of loans and leases: 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 of loans and leases $ 5,630,297 $ 575,473 $ 7,990,569 $ 110,622 $ 14,306,961 $ 176,556 $ 14,483,517 Three Months Ended March 31, 2015 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 $ 25,097 $ 4,248 $ 39,858 $ 1,253 $ 70,456 $ 13,999 $ 84,455 Charge-offs (1,453 ) — (8,395 ) (63 ) (9,911 ) (579 ) (10,490 ) Recoveries 1,295 632 410 194 2,531 11 2,542 Provision (negative provision) 5,972 (2,707 ) 13,921 (582 ) 16,604 (733 ) 15,871 Balance, end of period $ 30,911 $ 2,173 $ 45,794 $ 802 $ 79,680 $ 12,698 $ 92,378 Amount of the allowance applicable to loans and leases: Individually evaluated for impairment $ 1,500 $ 55 $ 10,493 $ 178 $ 12,226 Collectively evaluated for impairment $ 29,411 $ 2,118 $ 35,301 $ 624 $ 67,454 Acquired loans with deteriorated credit quality $ 12,698 The ending balance of the loan and lease portfolio is composed of loans and leases: Individually evaluated for impairment $ 59,733 $ 8,639 $ 103,208 $ 3,729 $ 175,309 Collectively evaluated for impairment $ 5,528,697 $ 320,070 $ 5,903,859 $ 89,946 $ 11,842,572 Acquired loans with deteriorated credit quality $ 254,285 Ending balance of loans and leases $ 5,588,430 $ 328,709 $ 6,007,067 $ 93,675 $ 12,017,881 $ 254,285 $ 12,272,166
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, 2016 December 31, 2015 Unpaid Unpaid Recorded Principal Related Recorded Principal Related Investment Balance Allowance Investment Balance Allowance (In thousands) With An Allowance Recorded: Real estate mortgage: Commercial $ 25,440 $ 26,632 $ 1,206 $ 17,967 $ 19,219 $ 777 Residential 4,198 4,352 748 2,278 2,435 681 Real estate construction and land: Residential 743 743 21 747 747 26 Commercial: Cash flow 37,894 44,786 9,965 14,072 20,312 7,079 Asset-based 3,696 4,250 1,973 3,901 4,423 2,511 Equipment finance 51,247 58,862 15,964 11,193 11,894 8,032 Consumer 359 365 163 365 372 157 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 55,460 $ 65,094 $ 58,678 $ 68,333 Residential 6,190 12,347 5,487 11,406 Real estate construction and land: Commercial 7,202 7,197 7,256 7,256 Commercial: Cash flow 2,841 5,188 2,825 5,121 Asset-based 1,181 1,176 2,729 2,726 Venture capital — — 124 125 Equipment finance — — 40,216 44,194 Consumer 796 1,904 1,363 1,945 Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 91,288 $ 108,425 $ 1,954 $ 84,410 $ 101,393 $ 1,458 Real estate construction and land 7,945 7,940 21 8,003 8,003 26 Commercial 96,859 114,262 27,902 75,060 88,795 17,622 Consumer 1,155 2,269 163 1,728 2,317 157 Total $ 197,247 $ 232,896 $ 30,040 $ 169,201 $ 200,508 $ 19,263 Three Months Ended March 31, 2016 2015 Weighted Interest Weighted Interest Average Income Average Income Balance (1) Recognized Balance (1) Recognized (In thousands) With An Allowance Recorded: Real estate mortgage: Commercial $ 19,471 $ 243 $ 11,917 $ 148 Residential 4,198 24 2,796 7 Real estate construction and land: Commercial — — 403 5 Residential 743 4 759 4 Commercial: Cash flow 20,823 12 16,028 11 Asset-based 3,696 27 4,693 33 Equipment finance 49,322 — 4,581 — Consumer 341 3 383 4 With No Related Allowance Recorded: Real estate mortgage: Commercial $ 54,132 $ 217 $ 36,704 $ 74 Residential 5,405 14 5,187 6 Real estate construction and land: Commercial 7,202 62 7,457 271 Residential — — 20 — Commercial: Cash flow 2,683 1 3,845 46 Asset-based 1,181 15 7,435 48 Equipment finance — — 7,537 — Consumer 797 — 3,345 — Total Non-PCI Loans and Leases With and Without an Allowance Recorded: Real estate mortgage $ 83,206 $ 498 $ 56,604 $ 235 Real estate construction and land 7,945 66 8,639 280 Commercial 77,705 55 44,119 138 Consumer 1,138 3 3,728 4 Total $ 169,994 $ 622 $ 113,090 $ 657 _________________________ (1) For Non-PCI loans and leases reported as impaired at March 31, 2016 and 2015 , 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, 2016
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: 2016 2015 (In thousands) Commercial real estate $ — $ 487 Construction and land development 13,800 13,801 Single family residence 897 952 Total other real estate owned, net 14,697 15,240 Other foreclosed assets 3,613 6,880 Total foreclosed assets, net $ 18,310 $ 22,120
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, 2015 $ 22,120 Foreclosures 129 Provision for losses — Reductions related to sales (3,939 ) Balance, March 31, 2016 $ 18,310

Borrowings and Subordinated D26

Borrowings and Subordinated Debentures (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes our borrowings as of the dates indicated: March 31, 2016 December 31, 2015 Amount Rate Amount Rate (Dollars in thousands) Non‑recourse debt $ 1,401 6.20 % $ 3,914 5.49 % FHLB overnight advances 550,000 0.48 % 618,000 0.27 % Total borrowings $ 551,401 $ 621,914
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, 2016 December 31, 2015 Date Maturity Rate Index Series: Amount Rate Amount Rate Issued Date (Quarterly Reset) (Dollars in thousands) Trust V $ 10,310 3.74 % $ 10,310 3.63 % 8/15/2003 9/17/2033 3 month LIBOR + 3.10 Trust VI 10,310 3.68 % 10,310 3.39 % 9/3/2003 9/15/2033 3 month LIBOR + 3.05 Trust CII 5,155 3.59 % 5,155 3.35 % 9/17/2003 9/17/2033 3 month LIBOR + 2.95 Trust VII 61,856 3.37 % 61,856 3.07 % 2/5/2004 4/23/2034 3 month LIBOR + 2.75 Trust CIII 20,619 2.32 % 20,619 2.20 % 8/15/2005 9/15/2035 3 month LIBOR + 1.69 Trust FCCI 16,495 2.23 % 16,495 2.11 % 1/25/2007 3/15/2037 3 month LIBOR + 1.60 Trust FCBI 10,310 2.18 % 10,310 2.06 % 9/30/2005 12/15/2035 3 month LIBOR + 1.55 Trust CS 2005-1 82,475 2.58 % 82,475 2.46 % 11/21/2005 12/15/2035 3 month LIBOR + 1.95 Trust CS 2005-2 128,866 2.57 % 128,866 2.27 % 12/14/2005 1/30/2036 3 month LIBOR + 1.95 Trust CS 2006-1 51,545 2.57 % 51,545 2.27 % 2/22/2006 4/30/2036 3 month LIBOR + 1.95 Trust CS 2006-2 51,550 2.57 % 51,550 2.27 % 9/27/2006 10/30/2036 3 month LIBOR + 1.95 Trust CS 2006-3 (1) 29,335 1.88 % 28,007 1.98 % 9/29/2006 10/30/2036 3 month EURIBOR + 2.05 Trust CS 2006-4 16,470 2.57 % 16,470 2.27 % 12/5/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2006-5 6,650 2.57 % 6,650 2.27 % 12/19/2006 1/30/2037 3 month LIBOR + 1.95 Trust CS 2007-2 39,177 2.57 % 39,177 2.27 % 6/13/2007 7/30/2037 3 month LIBOR + 1.95 Gross subordinated debentures 541,123 539,795 Unamortized discount (2) (102,400 ) (103,795 ) Net subordinated debentures $ 438,723 $ 436,000 ___________________ (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, 2016
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, 2016 2015 (In thousands) Loan commitments to extend credit $ 3,812,544 $ 3,580,655 Standby letters of credit 217,610 210,292 Commitments to purchase equipment being acquired for lease to others — 6,663 $ 4,030,154 $ 3,797,610

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following tables present information on the assets measured and recorded at fair value on a recurring basis as of the dates indicated: Fair Value Measurements as of March 31, 2016 Measured on a Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Government agency and government‑sponsored enterprise pass-through securities $ 653,865 $ — $ 653,865 $ — Government agency and government‑sponsored enterprise collateralized mortgage obligations 443,732 — 443,732 — Covered private label CMOs 27,863 — — 27,863 Other private label CMOs 107,382 — 60,030 47,352 Municipal securities 1,517,592 — 1,517,592 — Corporate debt securities 45,483 — 45,483 — Collateralized loan obligations 139,572 — 139,572 — SBA securities 202,674 — 202,674 — Asset-backed and other securities 102,423 2,551 83,156 16,716 Total securities available-for-sale 3,240,586 2,551 3,146,104 91,931 Derivative assets 6,654 — 6,654 — Equity warrants 5,033 — — 5,033 Total recurring assets $ 3,252,273 $ 2,551 $ 3,152,758 $ 96,964 Derivative liabilities $ 2,079 $ — $ 2,079 $ — Fair Value Measurements as of December 31, 2015 Measured on a Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Securities available‑for‑sale: Government agency and government‑sponsored enterprise pass-through securities $ 767,797 $ — $ 767,797 $ — Government agency and government‑sponsored enterprise collateralized mortgage obligations 486,239 — 486,239 — Covered private label CMOs 29,782 — — 29,782 Other private label CMOs 115,014 — 63,555 51,459 Municipal securities 1,547,331 — 1,547,331 — US Treasury securities 69,380 69,380 — — Corporate debt securities 48,424 — 48,424 — Collateralized loan obligations 132,189 — 132,189 — SBA securities 211,157 — 211,157 — Government‑sponsored enterprise debt securities 36,913 — 36,913 — Asset-backed and other securities 115,211 2,562 94,449 18,200 Total securities available-for-sale 3,559,437 71,942 3,388,054 99,441 Derivative assets 11,919 — 11,919 — Equity warrants 4,914 — — 4,914 Total recurring assets $ 3,576,270 $ 71,942 $ 3,399,973 $ 104,355 Derivative liabilities $ 1,397 $ — $ 1,397 $ —
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 March 31, 2016 : Private Label CMOs Asset-Backed Securities Weighted Weighted Range Average Range Average Unobservable Inputs: of Inputs Input of Inputs Input Voluntary annual prepayment speeds 1.5% - 22.4% 10.5% 5% - 40% 14.2% Annual default rates 0.3% - 13.7% 2.4% 1% - 8% 3.7% Loss severity rates 0% - 96.9% 32.6% 10% - 91% 51.8% Discount rates 0.8% - 57.3% 3.8% 1.8% - 5.2% 3.4%
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 and asset-backed securities available-for-sale measured at fair value on a recurring basis for the period indicated: Private Asset-Backed Label CMOs Securities (In thousands) Balance, December 31, 2015 $ 81,241 $ 18,200 Total included in earnings 353 15 Total included in other comprehensive income (1,251 ) (12 ) Net settlements (5,128 ) (1,487 ) Balance, March 31, 2016 $ 75,215 $ 16,716
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, 2016 Measured on a Non‑Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 95,310 $ — $ 2,121 $ 93,189 Fair Value Measurement as of December 31, 2015 Measured on a Non‑Recurring Basis: Total Level 1 Level 2 Level 3 (In thousands) Impaired Non‑PCI loans $ 40,817 $ — $ 9,367 $ 31,450 Other real estate owned 14,101 — 14,101 — Investments carried at cost 107 — — 107 Total non-recurring $ 55,025 $ — $ 23,468 $ 31,557
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 March 31, Losses on Assets Measured on a Non‑Recurring Basis: 2016 2015 (In thousands) Impaired Non‑PCI loans $ (12,909 ) $ (9,192 ) Other real estate owned — (124 ) Total loss $ (12,909 ) $ (9,316 )
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 March 31, 2016 : Valuation Unobservable Weighted Asset: Fair Value Technique Inputs Range Average (In thousands) Impaired Non-PCI loans $ 52,516 Discounted cash flows Discount rates 0% - 9.04% 6.33% Impaired Non-PCI loans 38,910 Third party appraisals Discounts 10.00% - 28.44% 25.25% Impaired Non-PCI loans 1,763 Third party appraisals No discounts Total non-recurring Level 3 $ 93,189
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, 2016 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 161,977 $ 161,977 $ 161,977 $ — $ — Interest‑earning deposits in financial institutions 357,541 357,541 357,541 — — Securities available‑for‑sale 3,240,586 3,240,586 2,551 3,146,104 91,931 Investment in FHLB stock 17,250 17,250 — 17,250 — Investments carried at cost 1,990 4,950 — — 4,950 Loans and leases, net 14,353,156 14,337,455 — 2,121 14,335,334 Derivative assets 6,654 6,654 — 6,654 — Equity warrants 5,033 5,033 — — 5,033 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 11,956,102 11,956,102 — 11,956,102 — Time deposits 3,485,273 3,484,782 — 3,484,782 — Borrowings 551,401 551,401 550,000 1,401 — Subordinated debentures 438,723 421,669 — 421,669 — Derivative liabilities 2,079 2,079 — 2,079 — December 31, 2015 Carrying or Contract Estimated Fair Value Amount Total Level 1 Level 2 Level 3 ( In thousands ) Financial Assets: Cash and due from banks $ 161,020 $ 161,020 $ 161,020 $ — $ — Interest‑earning deposits in financial institutions 235,466 235,466 235,466 — — Securities available‑for‑sale 3,559,437 3,559,437 71,942 3,388,054 99,441 Investment in FHLB stock 19,710 19,710 — 19,710 — Investments carried at cost 2,267 6,789 — — 6,789 Loans and leases, net 14,363,143 14,393,558 — 9,367 14,384,191 Derivative assets 11,919 11,919 — 11,919 — Equity warrants 4,914 4,914 — — 4,914 Financial Liabilities: Deposits: Demand, money market, interest checking, and savings deposits 11,513,826 11,513,826 — 11,513,826 — Time deposits 4,152,356 4,152,920 — 4,152,920 — Borrowings 621,914 622,438 618,000 4,438 — Subordinated debentures 436,000 419,762 — 419,762 — Derivative liabilities 1,397 1,397 — 1,397 —

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2016
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, 2016 2015 2015 (Dollars in thousands, except per share data) Basic Earnings Per Share: Net earnings $ 90,456 $ 71,841 $ 73,079 Less: Earnings allocated to unvested restricted stock (1) (1,067 ) (690 ) (819 ) Net earnings allocated to common shares $ 89,389 $ 71,151 $ 72,260 Weighted-average basic shares and unvested restricted stock outstanding 121,598 120,385 103,035 Less: Weighted-average unvested restricted stock outstanding (1,392 ) (1,133 ) (1,122 ) Weighted-average basic shares outstanding 120,206 119,252 101,913 Basic earnings per share $ 0.74 $ 0.60 $ 0.71 Diluted Earnings Per Share: Net earnings allocated to common shares $ 89,389 $ 71,151 $ 72,260 Weighted-average basic shares outstanding 120,206 119,252 101,913 Diluted earnings per share $ 0.74 $ 0.60 $ 0.71 ________________________ (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)

Organization (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)acquisitionbank_branch	Dec. 31, 2015USD ($)
General Introduction [Abstract]
Assets	$ 21,031,009	$ 21,288,490
Gross loans and leases	14,500,000
Total deposits	15,441,375	15,666,182
Total stockholders' equity	$ 4,456,592	4,397,691
Number of businesses acquired | acquisition	28
Outstanding lease balance disposed	$ (139,000)
Accumulated Deficit
General Introduction [Abstract]
Total stockholders' equity	$ 104,363	$ 13,907
CapitalSource Inc.
General Introduction [Abstract]
Business Acquisition, Effective Date of Acquisition		Apr. 7, 2014
NORTH CAROLINA
General Introduction [Abstract]
Retail Branch Locations | bank_branch	1
CALIFORNIA
General Introduction [Abstract]
Retail Branch Locations | bank_branch	79

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Business Combinations [Abstract]
Severance and employee-related	$ 0	$ 10,500	$ 0
System conversion and integration	200	3,802	0
Asset write-downs, lease terminations and other facilities-related	0	125	0
Investment banking deal costs	0	0	1,050
Other (legal, accounting, insurance, consulting)	0	3,173	950
Total acquisition, integration and reorganization costs	$ 200	$ 17,600	$ 2,000

Acquisitions Textual (Details)

Acquisitions Textual (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Oct. 06, 2015
Business Acquisition [Line Items]
Goodwill	$ 2,175,791	$ 2,176,291
Square 1 Financial, Inc.
Business Acquisition [Line Items]
Assets acquired			$ 4,600,000
Liabilities assumed			3,800,000
Goodwill			$ 447,900

Goodwill and Other Intangible33

Goodwill and Other Intangible Assets (Details)	3 Months Ended
	Mar. 31, 2016USD ($)
Goodwill [Roll Forward]
Balance, December 31, 2015	$ 2,176,291,000
Reduction due to sale of PWEF leasing unit	(500,000)
Balance, March 31, 2016	$ 2,175,791,000

Goodwill and Other Intangible34

Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
CDI and CRI Balance, beginning of period	$ 95,524	$ 53,090	$ 53,090
Additions	0	45,426	0
Fully amortized portion	0	(2,992)	0
Reduction due to sale of PWEF leasing unit	(1,363)	0	0
CDI and CRI Balance, end of period	93,824	95,524	53,090
Accumulated Amortization, beginning of period	(42,304)	(40,386)	(35,886)
Amortization	(4,746)	(4,910)	(1,501)
Accumulated Amortization, end of period	(45,687)	(42,304)	(37,387)
Net CDI and CRI, end of period	48,137	53,220	15,703
CDI and CRI
Finite-Lived Intangible Assets [Line Items]
Fully amortized portion	0	(2,992)	0
Reduction due to sale of PWEF leasing unit	$ (1,700)	$ 0	$ 0

Goodwill and Other Intangible35

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
Intangible asset amortization	$ 4,746	$ 4,910	$ 1,501
Aggregate Amortization Expense 2016	11,500
Aggregate Amortization Expense 2017	8,800
Aggregate Amortization Expense 2018	6,700
Aggregate Amortization Expense 2019	4,700
Aggregate Amortization Expense 2020	$ 3,000
Scenario, Forecast
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization				$ 16,100

Investment Securities (Details

Investment Securities (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	$ 3,158,551	$ 3,512,385
Available-for-sale Securities, Gross Unrealized Gain	92,003	62,157
Available-for-sale Securities, Gross Unrealized Loss	(9,968)	(15,105)
Securities available‑for‑sale	3,240,586	3,559,437
Government agency and government-sponsored enterprise pass through securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	642,233	759,881
Available-for-sale Securities, Gross Unrealized Gain	12,865	12,075
Available-for-sale Securities, Gross Unrealized Loss	(1,233)	(4,159)
Securities available‑for‑sale	653,865	767,797
Government agency and government-sponsored enterprise collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	431,456	486,065
Available-for-sale Securities, Gross Unrealized Gain	12,515	3,584
Available-for-sale Securities, Gross Unrealized Loss	(239)	(3,410)
Securities available‑for‑sale	443,732	486,239
Covered private label collateralized mortgage obligation
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	23,026	24,113
Available-for-sale Securities, Gross Unrealized Gain	5,064	5,794
Available-for-sale Securities, Gross Unrealized Loss	(227)	(125)
Securities available‑for‑sale	27,863	29,782
Other Private Label Collateralized Mortgage Obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	108,019	115,952
Available-for-sale Securities, Gross Unrealized Gain	246	43
Available-for-sale Securities, Gross Unrealized Loss	(883)	(981)
Securities available‑for‑sale	107,382	115,014
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	1,457,795	1,508,968
Available-for-sale Securities, Gross Unrealized Gain	59,886	39,435
Available-for-sale Securities, Gross Unrealized Loss	(89)	(1,072)
Securities available‑for‑sale	1,517,592	1,547,331
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	0	70,196
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	0	(816)
Securities available‑for‑sale	0	69,380
Corporate Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	47,269	49,047
Available-for-sale Securities, Gross Unrealized Gain	303	327
Available-for-sale Securities, Gross Unrealized Loss	(2,089)	(950)
Securities available‑for‑sale	45,483	48,424
Collateralized Loan Obligations
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	142,637	133,192
Available-for-sale Securities, Gross Unrealized Gain	42	128
Available-for-sale Securities, Gross Unrealized Loss	(3,107)	(1,131)
Securities available‑for‑sale	139,572	132,189
Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	201,934	211,946
Available-for-sale Securities, Gross Unrealized Gain	947	41
Available-for-sale Securities, Gross Unrealized Loss	(207)	(830)
Securities available‑for‑sale	202,674	211,157
US Government-sponsored Enterprises Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	0	36,302
Available-for-sale Securities, Gross Unrealized Gain	0	611
Available-for-sale Securities, Gross Unrealized Loss	0	0
Securities available‑for‑sale	0	36,913
Asset-backed and other securities
Schedule of Available-for-sale Securities [Line Items]
Total securities available-for-sale	104,182	116,723
Available-for-sale Securities, Gross Unrealized Gain	135	119
Available-for-sale Securities, Gross Unrealized Loss	(1,894)	(1,631)
Securities available‑for‑sale	$ 102,423	$ 115,211

Investment Securities (Detail37

Investment Securities (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 594,960	$ 1,377,664
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(8,067)	(13,632)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	56,074	41,832
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,901)	(1,473)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	651,034	1,419,496
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(9,968)	(15,105)
Government agency and government-sponsored enterprise pass through securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	196,388	391,642
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,135)	(3,893)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	9,422	9,342
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(98)	(266)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	205,810	400,984
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,233)	(4,159)
Government agency and government-sponsored enterprise collateralized mortgage obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	33,702	314,284
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(239)	(2,769)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	14,230
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	0	(641)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	33,702	328,514
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(239)	(3,410)
Covered private label collateralized mortgage obligation
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,239	1,354
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(98)	(57)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	849	568
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(129)	(68)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,088	1,922
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(227)	(125)
Other Private Label Collateralized Mortgage Obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	59,407	92,179
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(838)	(943)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,029	1,070
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(45)	(38)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	60,436	93,249
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(883)	(981)
Municipal securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	18,108	126,892
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(55)	(1,061)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,496	531
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(34)	(11)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	23,604	127,423
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(89)	(1,072)
US Treasury Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		69,380
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(816)
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		69,380
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		(816)
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	28,180	29,379
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(2,089)	(950)
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	28,180	29,379
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(2,089)	(950)
Collateralized Loan Obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	106,773	100,993
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(2,121)	(1,131)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	23,355	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(986)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	130,128	100,993
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(3,107)	(1,131)
Asset-backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	87,150	179,942
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(207)	(830)
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	87,150	179,942
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(207)	(830)
Asset-backed and other securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	64,013	71,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,285)	(1,182)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	15,923	16,091
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(609)	(449)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	79,936	87,710
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (1,894)	$ (1,631)

Investment Securities (Detail38

Investment Securities (Details 3) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Due in one year or less	$ 12,821
Due after one year through five years	216,420
Due after five years through ten years	603,523
Due after ten years	2,325,787
Total securities available-for-sale	3,158,551	$ 3,512,385
Fair Value Disclosures [Abstract]
Due in one year or less	12,628
Due after one year through five years	219,110
Due after five years through ten years	619,214
Due after ten years	2,389,634
Total securities available-for-sale	$ 3,240,586	$ 3,559,437

Investment Securities (Detail39

Investment Securities (Details 4) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Taxable interest	$ 11,396	$ 12,730	$ 7,473
Non-taxable interest	10,726	10,459	3,894
Dividend income	425	459	828
Total interest income on investment securities	$ 22,547	$ 23,648	$ 12,195

Investment Securities (Detail40

Investment Securities (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available For Sale Securities Pledged As Collateral Amortized Cost	$ 414,600,000
Payments to Acquire Investments	52,200,000	$ 196,600,000
Proceeds from Sale of Available-for-sale Securities	343,031,000	144,945,000
Available-for-sale Securities, Gross Realized Gains	8,900,000	3,700,000
Available-for-sale Securities, Gross Realized Losses	800,000	400,000
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sale of Available-for-sale Securities	$ 334,900,000	$ 141,700,000

Loans and Leases (Details)

Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	$ 14,542,522	$ 14,528,165
Loans and Leases Receivable, Deferred Income		(49,911)
Loans and Leases Receivable, Allowance	(130,361)	(115,111)
Total loans and leases, net	14,353,156	14,363,143
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	14,365,915	14,339,070
Loans and Leases Receivable, Deferred Income	(58,954)	(49,861)
Loans held for investment, net	14,306,961	14,289,209	$ 12,017,881
Loans and Leases Receivable, Allowance	(120,807)	(105,534)	(79,680)	$ (70,456)
Total loans and leases, net	14,186,154	14,183,675
Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	176,607	189,095
Loans and Leases Receivable, Deferred Income	(51)	(50)
Loans held for investment, net	176,556	189,045	254,285
Loans and Leases Receivable, Allowance	(9,554)	(9,577)
Total loans and leases, net	167,002	179,468
NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	14,542,522	14,528,165
Loans and Leases Receivable, Deferred Income	(59,005)	(49,911)
Loans held for investment, net	14,483,517	14,478,254
Loans and Leases Receivable, Allowance	(130,361)	(115,111)
Total loans and leases, net	14,353,156	14,363,143
Mortgage Loans on Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	5,649,282	5,706,903
Loans held for investment, net	5,630,297	5,688,063	5,588,430
Loans and Leases Receivable, Allowance	(29,099)	(36,654)	(30,911)	(25,097)
Mortgage Loans on Real Estate | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	160,122	168,725
Mortgage Loans on Real Estate | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	5,809,404	5,875,628
Real Estate Construction | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	584,968	534,307
Loans held for investment, net	575,473	527,720	328,709
Loans and Leases Receivable, Allowance	(6,876)	(7,137)	(2,173)	(4,248)
Real Estate Construction | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	2,689	2,656
Real Estate Construction | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	587,657	536,963
Commercial Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	8,021,092	7,977,067
Loans held for investment, net	7,990,569	7,952,577	6,007,067
Loans and Leases Receivable, Allowance	(83,957)	(61,082)	(45,794)	(39,858)
Commercial Portfolio Segment | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	13,513	17,415
Commercial Portfolio Segment | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	8,034,605	7,994,482
Consumer Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	110,573	120,793
Loans held for investment, net	110,622	120,849	93,675
Loans and Leases Receivable, Allowance	(875)	(661)	$ (802)	$ (1,253)
Consumer Portfolio Segment | Purchased Credit Impaired Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	283	299
Consumer Portfolio Segment | NonPCI and PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Gross loans and leases	$ 110,856	$ 121,092

Loans and Leases (Details 1)

Loans and Leases (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Delinquent loans in loan portfolio
30-89 Days Past Due	$ 13,700	$ 3,600
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	13,500	16,800
Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	31,440	10,622
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	16,058	17,508
Financing Receivable, Recorded Investment, Past Due	47,498	28,130
Current	14,259,463	14,261,079
Loans held for investment, net	14,306,961	14,289,209	$ 12,017,881
Mortgage Loans on Real Estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	18,842	7,338
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	11,197	13,980
Financing Receivable, Recorded Investment, Past Due	30,039	21,318
Current	5,600,258	5,666,745
Loans held for investment, net	5,630,297	5,688,063	5,588,430
Mortgage Loans on Real Estate | Commercial Real Estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	16,655	3,947
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	10,638	13,075
Financing Receivable, Recorded Investment, Past Due	27,293	17,022
Current	4,525,668	4,534,936
Loans held for investment, net	4,552,961	4,551,958
Mortgage Loans on Real Estate | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	2,187	3,391
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	559	905
Financing Receivable, Recorded Investment, Past Due	2,746	4,296
Current	1,074,590	1,131,809
Loans held for investment, net	1,077,336	1,136,105
Real Estate Construction | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Current	575,473	527,720
Loans held for investment, net	575,473	527,720	328,709
Real Estate Construction | 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
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Current	305,529	343,360
Loans held for investment, net	305,529	343,360
Real Estate Construction | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Current	269,944	184,360
Loans held for investment, net	269,944	184,360
Commercial Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	12,568	2,658
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	4,153	2,221
Financing Receivable, Recorded Investment, Past Due	16,721	4,879
Current	7,973,848	7,947,698
Loans held for investment, net	7,990,569	7,952,577	6,007,067
Commercial Portfolio Segment | Cash Flow | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	766	2,048
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	2,013	1,427
Financing Receivable, Recorded Investment, Past Due	2,779	3,475
Current	3,163,035	3,058,793
Loans held for investment, net	3,165,814	3,062,268
Commercial Portfolio Segment | Asset Based | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	4	1
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Financing Receivable, Recorded Investment, Past Due	4	1
Current	2,588,912	2,547,532
Loans held for investment, net	2,588,916	2,547,533
Commercial Portfolio Segment | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	9,554	250
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	700
Financing Receivable, Recorded Investment, Past Due	9,554	950
Current	1,493,057	1,451,477
Loans held for investment, net	1,502,611	1,452,427
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	2,244	359
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	2,140	94
Financing Receivable, Recorded Investment, Past Due	4,384	453
Current	728,844	889,896
Loans held for investment, net	733,228	890,349
Consumer Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Delinquent loans in loan portfolio
30-89 Days Past Due	30	626
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	708	1,307
Financing Receivable, Recorded Investment, Past Due	738	1,933
Current	109,884	118,916
Loans held for investment, net	$ 110,622	$ 120,849	$ 93,675

Loans and Leases (Details 2)

Loans and Leases (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 130,418	$ 129,019
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	130,418	129,019
Loans and Leases Receivable, Net of Deferred Income	14,306,961	14,289,209	$ 12,017,881
Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	14,176,543	14,160,190
Consumer Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	926	1,531
Loans and Leases Receivable, Net of Deferred Income	110,622	120,849	93,675
Consumer Portfolio Segment | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	109,696	119,318
Commercial Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	92,958	69,839
Loans and Leases Receivable, Net of Deferred Income	7,990,569	7,952,577	6,007,067
Commercial Portfolio Segment | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,897,611	7,882,738
Commercial Portfolio Segment | Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	124
Loans and Leases Receivable, Net of Deferred Income	1,502,611	1,452,427
Commercial Portfolio Segment | Venture Capital Loans | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,502,611	1,452,303
Commercial Portfolio Segment | Asset Based | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,046	2,505
Loans and Leases Receivable, Net of Deferred Income	2,588,916	2,547,533
Commercial Portfolio Segment | Asset Based | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,586,870	2,545,028
Commercial Portfolio Segment | Cash Flow | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	39,665	15,800
Loans and Leases Receivable, Net of Deferred Income	3,165,814	3,062,268
Commercial Portfolio Segment | Cash Flow | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,126,149	3,046,468
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	51,247	51,410
Loans and Leases Receivable, Net of Deferred Income	733,228	890,349
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	681,981	838,939
Real Estate Construction | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	370	372
Loans and Leases Receivable, Net of Deferred Income	575,473	527,720	328,709
Real Estate Construction | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	575,103	527,348
Real Estate Construction | Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Net of Deferred Income	305,529	343,360
Real Estate Construction | Commercial Real Estate Construction Loan Receivable | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	305,529	343,360
Real Estate Construction | Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	370	372
Loans and Leases Receivable, Net of Deferred Income	269,944	184,360
Real Estate Construction | Residential Real Estate Construction Financing Receivable | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	269,574	183,988
Mortgage Loans on Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	36,164	57,277
Loans and Leases Receivable, Net of Deferred Income	5,630,297	5,688,063	$ 5,588,430
Mortgage Loans on Real Estate | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,594,133	5,630,786
Mortgage Loans on Real Estate | Commercial Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	30,357	52,363
Loans and Leases Receivable, Net of Deferred Income	4,552,961	4,551,958
Mortgage Loans on Real Estate | Commercial Real Estate | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,522,604	4,499,595
Mortgage Loans on Real Estate | Residential Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	5,807	4,914
Loans and Leases Receivable, Net of Deferred Income	1,077,336	1,136,105
Mortgage Loans on Real Estate | Residential Real Estate | Performing Financing Receivable [Member] | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 1,071,529	$ 1,131,191

Loans and Leases (Details 3)

Loans and Leases (Details 3) - Non Purchased Credit Impaired Loans and Leases - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 14,306,961	$ 14,289,209	$ 12,017,881
Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	384,698	391,754
Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,922,263	13,897,455
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	110,622	120,849	93,675
Consumer Portfolio Segment | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,385	2,500
Consumer Portfolio Segment | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	109,237	118,349
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,990,569	7,952,577	6,007,067
Commercial Portfolio Segment | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	297,480	276,225
Commercial Portfolio Segment | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,693,089	7,676,352
Commercial Portfolio Segment | Cash Flow
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,165,814	3,062,268
Commercial Portfolio Segment | Cash Flow | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	209,108	183,726
Commercial Portfolio Segment | Cash Flow | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,956,706	2,878,542
Commercial Portfolio Segment | Asset Based
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,588,916	2,547,533
Commercial Portfolio Segment | Asset Based | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	22,236	19,340
Commercial Portfolio Segment | Asset Based | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,566,680	2,528,193
Commercial Portfolio Segment | Venture Capital Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,502,611	1,452,427
Commercial Portfolio Segment | Venture Capital Loans | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	14,889	19,105
Commercial Portfolio Segment | Venture Capital Loans | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,487,722	1,433,322
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	733,228	890,349
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	51,247	54,054
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	681,981	836,295
Real Estate Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	575,473	527,720	328,709
Real Estate Construction | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,940	1,966
Real Estate Construction | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	573,533	525,754
Real Estate Construction | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	305,529	343,360
Real Estate Construction | Commercial Real Estate Construction Loan Receivable | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	558	571
Real Estate Construction | Commercial Real Estate Construction Loan Receivable | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	304,971	342,789
Real Estate Construction | Residential Real Estate Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	269,944	184,360
Real Estate Construction | Residential Real Estate Construction Financing Receivable | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,382	1,395
Real Estate Construction | Residential Real Estate Construction Financing Receivable | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	268,562	182,965
Mortgage Loans on Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,630,297	5,688,063	$ 5,588,430
Mortgage Loans on Real Estate | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	83,893	111,063
Mortgage Loans on Real Estate | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,546,404	5,577,000
Mortgage Loans on Real Estate | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,552,961	4,551,958
Mortgage Loans on Real Estate | Commercial Real Estate | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	65,532	98,436
Mortgage Loans on Real Estate | Commercial Real Estate | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,487,429	4,453,522
Mortgage Loans on Real Estate | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,077,336	1,136,105
Mortgage Loans on Real Estate | Residential Real Estate | Classified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18,361	12,627
Mortgage Loans on Real Estate | Residential Real Estate | Nonclassified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 1,058,975	$ 1,123,478

Loans and Leases (Details 4)

Loans and Leases (Details 4) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 130,418	$ 129,019
Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	130,418	129,019
Impaired Financing Receivable Performing Restructured Loans	66,829	40,182
Impaired Financing Receivable, Recorded Investment	197,247	169,201
Consumer Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	926	1,531
Impaired Financing Receivable Performing Restructured Loans	229	197
Impaired Financing Receivable, Recorded Investment	1,155	1,728
Commercial Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	92,958	69,839
Impaired Financing Receivable Performing Restructured Loans	3,901	5,221
Impaired Financing Receivable, Recorded Investment	96,859	75,060
Real Estate Construction | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	370	372
Impaired Financing Receivable Performing Restructured Loans	7,575	7,631
Impaired Financing Receivable, Recorded Investment	7,945	8,003
Mortgage Loans on Real Estate | Non Purchased Credit Impaired Loans and Leases
Schedule Of Non Accrual and Performing Restructured Impaired Financing Receivables [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	36,164	57,277
Impaired Financing Receivable Performing Restructured Loans	55,124	27,133
Impaired Financing Receivable, Recorded Investment	$ 91,288	$ 84,410

Loans and Leases (Details 5)

Loans and Leases (Details 5) - Non Purchased Credit Impaired Loans and Leases - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		$ 30,040		$ 19,263
Impaired Financing Receivable, Recorded Investment		197,247		169,201
Impaired Financing Receivable, Unpaid Principal Balance		232,896		200,508
Impaired Financing Receivable, Average Recorded Investment	[1]	169,994	$ 113,090
Impaired Financing Receivable, Interest Income, Accrual Method		622	657
Consumer Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		359		365
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		365		372
Impaired Financing Receivable, Related Allowance		163		157
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		796		1,363
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		1,904		1,945
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	341	383
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		3	4
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	797	3,345
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, Recorded Investment		1,155		1,728
Impaired Financing Receivable, Unpaid Principal Balance		2,269		2,317
Impaired Financing Receivable, Average Recorded Investment	[1]	1,138	3,728
Impaired Financing Receivable, Interest Income, Accrual Method		3	4
Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		27,902		17,622
Impaired Financing Receivable, Recorded Investment		96,859		75,060
Impaired Financing Receivable, Unpaid Principal Balance		114,262		88,795
Impaired Financing Receivable, Average Recorded Investment	[1]	77,705	44,119
Impaired Financing Receivable, Interest Income, Accrual Method		55	138
Real Estate Construction
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		21		26
Impaired Financing Receivable, Recorded Investment		7,945		8,003
Impaired Financing Receivable, Unpaid Principal Balance		7,940		8,003
Impaired Financing Receivable, Average Recorded Investment	[1]	7,945	8,639
Impaired Financing Receivable, Interest Income, Accrual Method		66	280
Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		1,954		1,458
Impaired Financing Receivable, Recorded Investment		91,288		84,410
Impaired Financing Receivable, Unpaid Principal Balance		108,425		101,393
Impaired Financing Receivable, Average Recorded Investment	[1]	83,206	56,604
Impaired Financing Receivable, Interest Income, Accrual Method		498	235
Commercial Real Estate | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		25,440		17,967
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		26,632		19,219
Impaired Financing Receivable, Related Allowance		1,206		777
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		55,460		58,678
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		65,094		68,333
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	19,471	11,917
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		243	148
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	54,132	36,704
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		217	74
Residential Real Estate | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		4,198		2,278
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		4,352		2,435
Impaired Financing Receivable, Related Allowance		748		681
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		6,190		5,487
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		12,347		11,406
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		4,198	2,796
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		24	7
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	5,405	5,187
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		14	6
Commercial Real Estate Construction Loan Receivable | Real Estate Construction
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		7,202		7,256
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		7,197		7,256
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0	403
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	5
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	7,202	7,457
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		62	271
Residential Real Estate Construction Financing Receivable | Real Estate Construction
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		743		747
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		743		747
Impaired Financing Receivable, Related Allowance		21		26
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	743	759
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		4	4
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	0	20
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0	0
Cash Flow | Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		37,894		14,072
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		44,786		20,312
Impaired Financing Receivable, Related Allowance		9,965		7,079
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		2,841		2,825
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		5,188		5,121
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	20,823	16,028
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		12	11
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	2,683	3,845
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		1	46
Asset Based | Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		3,696		3,901
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		4,250		4,423
Impaired Financing Receivable, Related Allowance		1,973		2,511
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		1,181		2,729
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		1,176		2,726
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	3,696	4,693
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		27	33
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	1,181	7,435
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		15	48
Venture Capital Loans | Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0		124
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0		125
Equipment Finance Commercial Financing Receivable | Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		51,247		11,193
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		58,862		11,894
Impaired Financing Receivable, Related Allowance		15,964		8,032
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0		40,216
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0		$ 44,194
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	49,322	4,581
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	0	7,537
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		$ 0	$ 0
[1]	For Non-PCI loans and leases reported as impaired at March 31, 2016 and 2015, 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) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Contract	Mar. 31, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 230	$ 1,904	[1],[2]
Financing Receivable, Modifications, Number of Contracts | Contract	14	30
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 6,911	$ 15,068
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 6,911	$ 14,701
Mortgage Loans on Real Estate | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 230	$ 1,511
Financing Receivable, Modifications, Number of Contracts	4	9
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 3,140	$ 5,161
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 3,140	$ 5,113
Mortgage Loans on Real Estate | Residential Real Estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 8
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 165	$ 913
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 165	$ 773
Real Estate Construction | Commercial Real Estate Construction Loan Receivable
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract	0	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 2,610
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 2,610
Commercial Portfolio Segment | Cash Flow
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract	4	4
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 257	$ 761
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 257	$ 582
Commercial Portfolio Segment | Asset Based
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 385
Financing Receivable, Modifications, Number of Contracts | Contract	2	6
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 629	$ 1,399
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 629	$ 1,399
Commercial Portfolio Segment | Equipment Finance Commercial Financing Receivable
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract	2	4
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,660	$ 4,133
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,660	$ 4,133
Consumer Portfolio Segment
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract	1	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 60	$ 91
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 60	$ 91
[1]	Represents the balance at March 31, 2015, and is net of charge-offs of $772,000.
[2]	The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. The table excludes defaulted troubled restructurings in those classes for which the recorded investment was zero at the end of the period.

Loans and Leases (Details 7

Loans and Leases (Details 7	3 Months Ended
	Mar. 31, 2016USD ($)Contract	Mar. 31, 2015USD ($)Contract		Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	$ 130,361,000			$ 115,111,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 772,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 230,000	$ 1,904,000	[1],[2]
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	120,807,000	79,680,000		105,534,000	$ 70,456,000
Allowance for Loan and Lease Losses, Write-offs	(5,373,000)	(9,911,000)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	1,481,000	2,531,000
Provision for Loan and Lease Losses	19,165,000	16,604,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	30,040,000	12,226,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	90,767,000	67,454,000
Financing Receivable, Individually Evaluated for Impairment	196,491,000	175,309,000
Financing Receivable, Collectively Evaluated for Impairment	14,110,470,000	11,842,572,000
Loans and Leases Receivable, Net of Deferred Income	14,306,961,000	12,017,881,000		14,289,209,000
Purchased Credit Impaired Loans and Leases
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	9,554,000			9,577,000
Loans and Leases Receivable, Allowance, Covered	9,554,000	12,698,000		9,577,000	13,999,000
Allowance for Loan and Lease Losses, Write-offs	(163,000)	(579,000)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	0	11,000
Provision for Loan and Lease Losses	140,000	(733,000)
Receivables Acquired With Deteriorated Credit Quality, Allowance For Credit Losses	9,554,000	12,698,000
Receivables Acquired with Deteriorated Credit Quality	176,556,000	254,285,000
Loans and Leases Receivable, Net of Deferred Income	176,556,000	254,285,000		189,045,000
NonPCI and PCI Loans
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	130,361,000			115,111,000
Loans and Leases Receivable Allowance Covered And Noncovered	130,361,000	92,378,000		115,111,000	84,455,000
Allowance for Loan and Lease Losses, Write-offs	(5,536,000)	(10,490,000)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	1,481,000	2,542,000
Provision for Loan and Lease Losses	19,305,000	15,871,000
Loans and Leases Receivable, Net of Deferred Income	14,483,517,000			14,478,254,000
Loans and Leases Receivable Net Of Deferred Income Covered And Noncovered	14,483,517,000	12,272,166,000
Consumer Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	875,000	802,000		661,000	1,253,000
Allowance for Loan and Lease Losses, Write-offs	(591,000)	(63,000)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	16,000	194,000
Provision for Loan and Lease Losses	789,000	(582,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	163,000	178,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	712,000	624,000
Financing Receivable, Individually Evaluated for Impairment	1,102,000	3,729,000
Financing Receivable, Collectively Evaluated for Impairment	109,520,000	89,946,000
Loans and Leases Receivable, Net of Deferred Income	$ 110,622,000	$ 93,675,000		120,849,000
Commercial Portfolio Segment | Asset Based
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 385,000
Commercial Portfolio Segment | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	83,957,000	45,794,000		61,082,000	39,858,000
Allowance for Loan and Lease Losses, Write-offs	(4,045,000)	(8,395,000)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	314,000	410,000
Provision for Loan and Lease Losses	26,606,000	13,921,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	27,902,000	10,493,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	56,055,000	35,301,000
Financing Receivable, Individually Evaluated for Impairment	96,614,000	103,208,000
Financing Receivable, Collectively Evaluated for Impairment	7,893,955,000	5,903,859,000
Loans and Leases Receivable, Net of Deferred Income	7,990,569,000	6,007,067,000		7,952,577,000
Commercial Portfolio Segment | Non Purchased Credit Impaired Loans and Leases | Asset Based
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,588,916,000			2,547,533,000
Real Estate Construction | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	6,876,000	2,173,000		7,137,000	4,248,000
Allowance for Loan and Lease Losses, Write-offs	0	0
Allowance for Loan and Lease Loss, Recovery of Bad Debts	152,000	632,000
Provision for Loan and Lease Losses	(413,000)	(2,707,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	21,000	55,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	6,855,000	2,118,000
Financing Receivable, Individually Evaluated for Impairment	7,945,000	8,639,000
Financing Receivable, Collectively Evaluated for Impairment	567,528,000	320,070,000
Loans and Leases Receivable, Net of Deferred Income	575,473,000	328,709,000		527,720,000
Mortgage Loans on Real Estate | Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Modifications [Line Items]
Allowance for loan and lease losses	29,099,000	30,911,000		36,654,000	$ 25,097,000
Allowance for Loan and Lease Losses, Write-offs	(737,000)	(1,453,000)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	999,000	1,295,000
Provision for Loan and Lease Losses	(7,817,000)	5,972,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,954,000	1,500,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	27,145,000	29,411,000
Financing Receivable, Individually Evaluated for Impairment	90,830,000	59,733,000
Financing Receivable, Collectively Evaluated for Impairment	5,539,467,000	5,528,697,000
Loans and Leases Receivable, Net of Deferred Income	$ 5,630,297,000	$ 5,588,430,000		$ 5,688,063,000
[1]	Represents the balance at March 31, 2015, and is net of charge-offs of $772,000.
[2]	The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. The table excludes defaulted troubled restructurings in those classes for which the recorded investment was zero at the end of the period.

Loans and Leases (Details Textu

Loans and Leases (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Receivables [Abstract]
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 772,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing			$ 700,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	13,500,000		16,800,000
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	13,700,000		3,600,000
Financing Receivable Recorded Investment Nonaccrual Status Current	103,200,000		108,600,000
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 130,418,000		$ 129,019,000

Foreclosed Assets (Details)

Foreclosed Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Real Estate Owned Net	$ 14,697	$ 15,240
Other Foreclosed Assets NonCovered	3,613	6,880
Other Real Estate Owned Net Noncovered including Foreclosed Assets	18,310	22,120
Other Real Estate Owned Net Covered and Noncovered including Foreclosed Assets	18,310	22,120
Commercial Real Estate
Other Real Estate Owned Net	0
Construction and Land Development
Other Real Estate Owned Net	13,800
Residential Mortgage
Other Real Estate Owned Net	$ 897
NonCovered | Commercial Real Estate
Other Real Estate Owned Net		487
NonCovered | Construction and Land Development
Other Real Estate Owned Net		13,801
NonCovered | Residential Mortgage
Other Real Estate Owned Net		$ 952

Foreclosed Assets (Details 1)

Foreclosed Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Foreclosed Assets Rollforward [Abstract]
Balance, December 31, 2015	$ 22,120
Foreclosures	129	$ 394
Provision for losses	0
Reductions related to sales	(3,939)
Balance, March 31, 2016	$ 18,310

Borrowings and Subordinated D52

Borrowings and Subordinated Debentures (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Borrowings	$ 551,401,000	$ 621,914,000
Notes Payable, Other Payables
Debt Instrument [Line Items]
Non-Recourse Debt	$ 1,401,000	$ 3,914,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	6.20%	5.49%
Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	0.48%	0.27%
Federal Home Loan Bank Advances | Secured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	$ 550,000,000	$ 618,000,000

Borrowings and Subordinated D53

Borrowings and Subordinated Debentures (Details 1) $ in Thousands, € in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Mar. 31, 2016EUR (€)
Subordinated Borrowing [Line Items]
Subordinated debentures		$ 438,723	$ 436,000
Subordinated Debt Trust V Due September 2033
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 10,310	$ 10,310
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.74%	3.63%	3.74%
Debt Instrument Date Issued		Aug. 15, 2003
Debt Instrument, Maturity Date		Sep. 17, 2033
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 3.10
Subordinated Debt Trust VI Due September 2033
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 10,310	$ 10,310
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.68%	3.39%	3.68%
Debt Instrument Date Issued		Sep. 3, 2003
Debt Instrument, Maturity Date		Sep. 15, 2033
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 3.05
Subordinated Debt Trust CII Due September 2033
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 5,155	$ 5,155
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.59%	3.35%	3.59%
Debt Instrument Date Issued		Sep. 17, 2003
Debt Instrument, Maturity Date		Sep. 17, 2033
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 2.95
Subordinated Debt Trust VII Due April 2034
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 61,856	$ 61,856
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.37%	3.07%	3.37%
Debt Instrument Date Issued		Feb. 5, 2004
Debt Instrument, Maturity Date		Apr. 23, 2034
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 2.75
Subordinated Debt Trust CIII Due September 2035
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 20,619	$ 20,619
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.32%	2.20%	2.32%
Debt Instrument Date Issued		Aug. 15, 2005
Debt Instrument, Maturity Date		Sep. 15, 2035
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.69
Subordinated Debt Trust FCCI Due March 2037
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 16,495	$ 16,495
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.23%	2.11%	2.23%
Debt Instrument Date Issued		Jan. 25, 2007
Debt Instrument, Maturity Date		Mar. 15, 2037
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.60
Subordinated Debt Trust FCBI Due December 2035
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 10,310	$ 10,310
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.18%	2.06%	2.18%
Debt Instrument Date Issued		Sep. 30, 2005
Debt Instrument, Maturity Date		Dec. 15, 2035
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.55
Trust Preferred Securities Two Thousand Five Series One
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 82,475	$ 82,475
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.58%	2.46%	2.58%
Debt Instrument Date Issued		Nov. 21, 2005
Debt Instrument, Maturity Date		Dec. 15, 2035
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Five Series Two
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 128,866	$ 128,866
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.57%	2.27%	2.57%
Debt Instrument Date Issued		Dec. 14, 2005
Debt Instrument, Maturity Date		Jan. 30, 2036
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Two Thousand Six One Term Debt Securitization
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 51,545	$ 51,545
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.57%	2.27%	2.57%
Debt Instrument Date Issued		Feb. 22, 2006
Debt Instrument, Maturity Date		Apr. 30, 2036
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Two Thousand Six Two Term Debt Securitization
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 51,550	$ 51,550
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.57%	2.27%	2.57%
Debt Instrument Date Issued		Sep. 27, 2006
Debt Instrument, Maturity Date		Oct. 30, 2036
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Long-term Debt, Gross	[1]	$ 29,335	$ 28,007
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		1.88%	1.98%	1.88%
Debt Instrument Date Issued		Sep. 29, 2006
Debt Instrument, Maturity Date		Oct. 30, 2036
Debt Instrument, Basis Spread on Variable Rate		3 month EURIBOR + 2.05
Liability, Reporting Currency Denominated, Value | €				€ 25.8
Trust Preferred Securities Two Thousand Six Series Four
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 16,470	$ 16,470
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.57%	2.27%	2.57%
Debt Instrument Date Issued		Dec. 5, 2006
Debt Instrument, Maturity Date		Jan. 30, 2037
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Trust Preferred Securities Two Thousand Six Series Five
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 6,650	$ 6,650
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.57%	2.27%	2.57%
Debt Instrument Date Issued		Dec. 19, 2006
Debt Instrument, Maturity Date		Jan. 30, 2037
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Two Thousand Seven One Term Debt Securitization
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 39,177	$ 39,177
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.57%	2.27%	2.57%
Debt Instrument Date Issued		Jun. 13, 2007
Debt Instrument, Maturity Date		Jul. 30, 2037
Debt Instrument, Basis Spread on Variable Rate		3 month LIBOR + 1.95
Subordinated Debt
Subordinated Borrowing [Line Items]
Long-term Debt, Gross		$ 541,123	$ 539,795
Debt Instrument, Unamortized Discount	[2]	(102,400)	(103,795)
Subordinated debentures		$ 438,723	$ 436,000
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust V Due September 2033
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			3.74%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust VI Due September 2033
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			3.68%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust CII Due September 2033
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			3.59%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust VII Due April 2034
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			3.37%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust CIII Due September 2035
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.32%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust FCCI Due March 2037
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.23%
London Interbank Offered Rate (LIBOR) | Subordinated Debt Trust FCBI Due December 2035
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.18%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Five Series One
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.58%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Five Series Two
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.57%
London Interbank Offered Rate (LIBOR) | Two Thousand Six One Term Debt Securitization
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.57%
London Interbank Offered Rate (LIBOR) | Two Thousand Six Two Term Debt Securitization
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.57%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Six Series Four
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.57%
London Interbank Offered Rate (LIBOR) | Trust Preferred Securities Two Thousand Six Series Five
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.57%
London Interbank Offered Rate (LIBOR) | Two Thousand Seven One Term Debt Securitization
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.57%
Euribor Future | Trust Preferred Securities Two Thousand Six Series Three
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.88%
[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.

Borrowings and Subordinated D54

Borrowings and Subordinated Debentures (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Notes Payable, Other Payables
Debt Instrument [Line Items]
Debt Instruments Weighted Average Remaining Maturity Period	2 years 3 months
Unsecured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 80,000,000
Unused lines of Credit
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	0	$ 0
American Financial Exchange
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	0
Federal Home Loan Bank of San Francisco | Unsecured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Borrowing Capacity, Description	99,000,000
Line of Credit Facility, Amount Outstanding	0
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Line of Credit Facility, Borrowing Capacity, Description	2,100,000,000
Line of Credit Facility, Amount Outstanding	0	0
Loans Pledged as Collateral	3,000,000,000
Federal Home Loan Bank Advances | Secured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Borrowing Capacity, Description	2,300,000,000
Line of Credit Facility, Amount Outstanding	$ 550,000,000	$ 618,000,000

Commitments and Contingencies55

Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2014	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Loan commitments to extend credit	$ 3,812,544	$ 3,580,655
Standby letters of credit	217,610		$ 210,292
Commitments to purchase equipment being acquired for lease to others	0	$ 6,663
Total	$ 4,030,154		$ 3,797,610

Commitments and Contingencies56

Commitments and Contingencies (Details Textual) $ in Millions	Mar. 31, 2016USD ($)fund	Dec. 31, 2015USD ($)fund
Long-term Purchase Commitment [Line Items]
Commitment To Contribute Capital	$ 21.5	$ 19.2
Private Equity Funds
Long-term Purchase Commitment [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	$ 2.9	$ 2.8
Number of funds | fund	19	11

Fair Value Measurements (Detail

Fair Value Measurements (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Securities available‑for‑sale	$ 3,240,586	$ 3,559,437
Warrants Not Settleable in Cash, Fair Value Disclosure	5,033	4,914
Level 1
Securities available‑for‑sale		71,942
Level 2
Securities available‑for‑sale		3,388,054
Level 3
Securities available‑for‑sale		99,441
Government agency and government-sponsored enterprise pass through securities
Securities available‑for‑sale	653,865	767,797
Government agency and government-sponsored enterprise collateralized mortgage obligations
Securities available‑for‑sale	443,732	486,239
Covered private label collateralized mortgage obligation
Securities available‑for‑sale	27,863	29,782
Municipal securities
Securities available‑for‑sale	1,517,592	1,547,331
US Treasury Securities
Securities available‑for‑sale	0	69,380
Asset-backed Securities
Securities available‑for‑sale	202,674	211,157
Corporate Debt Securities
Securities available‑for‑sale	45,483	48,424
Collateralized Loan Obligations
Securities available‑for‑sale	139,572	132,189
US Government-sponsored Enterprises Debt Securities
Securities available‑for‑sale	0	36,913
Asset-backed and other securities
Securities available‑for‑sale	102,423	115,211
Fair Value, Measurements, Recurring
Securities available‑for‑sale	3,240,586	3,559,437
Derivative Asset, Fair Value of Collateral	6,654	11,919
Assets, Fair Value Disclosure, Recurring	3,252,273	3,576,270
Derivative Liability, Fair Value of Collateral	2,079	1,397
Fair Value, Measurements, Recurring | Level 1
Securities available‑for‑sale	2,551	71,942
Derivative Asset, Fair Value of Collateral	0	0
Warrants Not Settleable in Cash, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure, Recurring	2,551	71,942
Derivative Liability, Fair Value of Collateral	0	0
Fair Value, Measurements, Recurring | Level 2
Securities available‑for‑sale	3,146,104	3,388,054
Derivative Asset, Fair Value of Collateral	6,654	11,919
Warrants Not Settleable in Cash, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure, Recurring	3,152,758	3,399,973
Derivative Liability, Fair Value of Collateral	2,079	1,397
Fair Value, Measurements, Recurring | Level 3
Securities available‑for‑sale	91,931	99,441
Derivative Asset, Fair Value of Collateral	0	0
Warrants Not Settleable in Cash, Fair Value Disclosure	5,033	4,914
Assets, Fair Value Disclosure, Recurring	96,964	104,355
Derivative Liability, Fair Value of Collateral	0	0
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities
Securities available‑for‑sale		767,797
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	653,865	767,797
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		486,239
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	443,732	486,239
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 | Covered private label collateralized mortgage obligation
Securities available‑for‑sale		29,782
Fair Value, Measurements, Recurring | Covered private label collateralized mortgage obligation | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Covered private label collateralized mortgage obligation | Level 2
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Covered private label collateralized mortgage obligation | Level 3
Securities available‑for‑sale	27,863	29,782
Fair Value, Measurements, Recurring | Other Private Label Collateralized Mortgage Obligations
Securities available‑for‑sale		115,014
Fair Value, Measurements, Recurring | Other Private Label Collateralized Mortgage Obligations | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Other Private Label Collateralized Mortgage Obligations | Level 2
Securities available‑for‑sale	60,030	63,555
Fair Value, Measurements, Recurring | Other Private Label Collateralized Mortgage Obligations | Level 3
Securities available‑for‑sale	47,352	51,459
Fair Value, Measurements, Recurring | Municipal securities
Securities available‑for‑sale		1,547,331
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	1,517,592	1,547,331
Fair Value, Measurements, Recurring | Municipal securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | US Treasury Securities | Level 1
Securities available‑for‑sale		69,380
Fair Value, Measurements, Recurring | US Treasury Securities | Level 2
Securities available‑for‑sale		0
Fair Value, Measurements, Recurring | US Treasury Securities | Level 3
Securities available‑for‑sale		0
Fair Value, Measurements, Recurring | Asset-backed Securities | Level 1
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Asset-backed Securities | Level 2
Securities available‑for‑sale	202,674	211,157
Fair Value, Measurements, Recurring | Asset-backed Securities | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | Corporate Debt Securities
Securities available‑for‑sale		48,424
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	45,483	48,424
Fair Value, Measurements, Recurring | Corporate Debt Securities | Level 3
Securities available‑for‑sale	0	0
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	139,572	132,189
Fair Value, Measurements, Recurring | Collateralized Loan Obligations | Level 3
Securities available‑for‑sale	0	0
Fair Value, Measurements, Recurring | US Government-sponsored Enterprises Debt Securities
Securities available‑for‑sale		36,913
Fair Value, Measurements, Recurring | US Government-sponsored Enterprises Debt Securities | Level 1
Securities available‑for‑sale		0
Fair Value, Measurements, Recurring | US Government-sponsored Enterprises Debt Securities | Level 2
Securities available‑for‑sale		36,913
Fair Value, Measurements, Recurring | US Government-sponsored Enterprises Debt Securities | Level 3
Securities available‑for‑sale		0
Fair Value, Measurements, Recurring | Asset-backed and other securities
Securities available‑for‑sale		115,211
Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 1
Securities available‑for‑sale	2,551	2,562
Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 2
Securities available‑for‑sale	83,156	94,449
Fair Value, Measurements, Recurring | Asset-backed and other securities | Level 3
Securities available‑for‑sale	$ 16,716	$ 18,200

Fair Value Measurements (Deta58

Fair Value Measurements (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants, Acquired From Acquisition		$ 4,914
Level 3 CMO Roll Forward [Abstract]
Gain on Sale of Investments	$ (274)
Proceeds from Issuance of Warrants	42
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	435
Warrants Not Settleable in Cash, Fair Value Disclosure	5,033	4,914
Level 3 | Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Warrants Not Settleable in Cash, Fair Value Disclosure	5,033	4,914
Level 3 | Private Label CMOs | Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Balance, December 31, 2015	81,241
Total included in earnings	353
Total included in other comprehensive income	(1,251)
Net settlements	(5,128)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	75,215	81,241
Level 3 | Asset-backed and other securities | Fair Value, Measurements, Recurring
Level 3 CMO Roll Forward [Abstract]
Balance, December 31, 2015	18,200
Total included in earnings	15
Total included in other comprehensive income	(12)
Net settlements	(1,487)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 16,716	$ 18,200
Level 3 | Minimum | Private Label CMOs | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Fair Value Inputs, Prepayment Rate	0.00%
Fair Value Inputs, Probability of Default	0.00%
Fair Value Inputs, Loss Severity	0.00%
Fair Value Inputs, Discount Rate	0.00%
Level 3 | Maximum | Private Label CMOs | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Fair Value Inputs, Prepayment Rate	22.44%
Fair Value Inputs, Probability of Default	13.73%
Fair Value Inputs, Loss Severity	96.94%
Fair Value Inputs, Discount Rate	57.25%
Level 3 | Weighted Average | Private Label CMOs | Fair Value, Measurements, Recurring
Unobservable Inputs Quantitative Information [Abstract]
Fair Value Inputs, Prepayment Rate	10.50%
Fair Value Inputs, Probability of Default	2.40%
Fair Value Inputs, Loss Severity	32.60%
Fair Value Inputs, Discount Rate	3.80%

Fair Value Measurements (Deta59

Fair Value Measurements (Details 3) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 55,025
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		23,468
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 93,189	31,557
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	95,310	40,817
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		9,367
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	$ 93,189	31,450
Other real estate and foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		14,101
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		14,101
Cost-method Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		107
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		107
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 (Deta60

Fair Value Measurements (Details 4) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Net Gain (Loss) from Nonrecurring Assets	$ (12,909)	$ (9,316)
Non Purchased Credit Impaired Loans and Leases
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Net Gain (Loss) from Nonrecurring Assets	$ (12,909)	(9,192)
Other real estate and foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Net Gain (Loss) from Nonrecurring Assets		$ (124)

Fair Value Measurements (Deta61

Fair Value Measurements (Details 5) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 55,025
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 93,189	31,557
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	95,310	40,817
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	$ 93,189	31,450
Cost-method Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		107
Cost-method Investments | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		$ 107
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]
Fair Value Inputs, Discount Rate	0.00%
Minimum | Third party appraisals | Other Real Estate Owned | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	27.60%
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]
Fair Value Inputs, Discount Rate	9.04%
Maximum | Third party appraisals | Other Real Estate Owned | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	43.90%
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]
Fair Value Inputs, Discount Rate	5.98%
Weighted Average | Third party appraisals | Other Real Estate Owned | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	32.90%
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	$ 52,516
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	38,910
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	$ 1,763

Fair Value Measurements (Deta62

Fair Value Measurements (Details 6) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 161,977	$ 161,020
Interest-earning deposits in financial institutions	357,541	235,466
Securities available-for-sale, at fair value	3,240,586	3,559,437
Available-for-sale Securities	3,240,586	3,559,437
Federal Home Loan Bank stock, at cost	17,250	19,710
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	17,250	19,710
Cost Method Investments	1,990	2,267
Cost Method Investments, Fair Value Disclosure	4,950	6,789
Loans and leases, net	14,353,156	14,363,143
Loans Receivable, Fair Value Disclosure	14,337,455
Derivative Asset	6,654	11,919
Deposits, Savings Deposits	11,956,102	11,513,826
Time Deposits	3,485,273	4,152,356
Deposits, Fair Value Disclosure	3,484,782	4,152,920
Borrowings	551,401	621,914
Borrowed Funds		621,914
Long-term Debt, Fair Value	551,401	622,438
Subordinated debentures	438,723	436,000
Subordinated Debt Obligations, Fair Value Disclosure	421,669	419,762
Derivative Liability		1,397
Warrants Not Settleable in Cash, Fair Value Disclosure	5,033	4,914
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	161,977	161,020
Interest-earning deposits in financial institutions	357,541	235,466
Available-for-sale Securities		71,942
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	550,000	618,000
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		3,388,054
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	17,250	19,710
Cost Method Investments, Fair Value Disclosure	0	0
Deposits, Savings Deposits	11,956,102	11,513,826
Deposits, Fair Value Disclosure	3,484,782	4,152,920
Long-term Debt, Fair Value	1,401	4,438
Subordinated Debt Obligations, Fair Value Disclosure	421,669	419,762
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		99,441
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	0	0
Cost Method Investments, Fair Value Disclosure	4,950	6,789
Loans Receivable, Fair Value Disclosure	14,335,334
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	3,240,586	3,559,437
Derivative Asset, Fair Value of Collateral	6,654	11,919
Derivative Liability, Fair Value of Collateral	2,079	1,397
Fair Value, Measurements, Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	2,551	71,942
Derivative Asset, Fair Value of Collateral	0	0
Derivative Liability, Fair Value of Collateral	0	0
Warrants Not Settleable in Cash, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	3,146,104	3,388,054
Derivative Asset, Fair Value of Collateral	6,654	11,919
Derivative Liability, Fair Value of Collateral	2,079	1,397
Warrants Not Settleable in Cash, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	91,931	99,441
Derivative Asset, Fair Value of Collateral	0	0
Derivative Liability, Fair Value of Collateral	0	0
Warrants Not Settleable in Cash, Fair Value Disclosure	5,033	4,914
Fair Value, Measurements, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring		55,025
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		23,468
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	93,189	31,557
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	95,310	40,817
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	2,121
Assets, Fair Value Disclosure, Nonrecurring		9,367
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	93,189	31,450
NonPCI and PCI Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and leases, net	$ 14,353,156	14,363,143
Loans Receivable, Fair Value Disclosure		14,393,558
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		9,367
NonPCI and PCI Loans | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Receivable, Fair Value Disclosure		$ 14,384,191

Fair Value Measurements (Deta63

Fair Value Measurements (Details Textual)	Mar. 31, 2016USD ($)
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0

Earnings Per Share (Details 1)

Earnings Per Share (Details 1) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Earnings Per Share [Abstract]
Net earnings from continuing operations		$ 90,456	$ 71,841	$ 73,079
Less: Earnings allocated to unvested restricted stock	[1]	(1,067)	(690)	(819)
Net earnings allocated to common shares		$ 89,389	$ 71,151	$ 72,260
Weighted-average basic shares and unvested restricted stock outstanding (shares)		121,598	120,385	103,035
Weighted-average unvested restricted stock outstanding (shares)		(1,392)	(1,133)	(1,122)
Weighted-average basic shares outstanding (shares)		120,206	119,252	101,913
Basic net income per share (usd per share)		$ 0.74	$ 0.60	$ 0.71
Net earnings from continuing operations allocated to common shares		$ 89,389	$ 71,151	$ 72,260
Diluted net income per share (usd per share)		$ 0.74	$ 0.60	$ 0.71
[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 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	1,562,557	1,211,951
Vesting period of time-based restricted stock, lower limit	3 years
Vesting period of time-based restricted stock, higher limit	4 years
Restricted Stock | Vesting Based On Service
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 5	$ 3.8	$ 3.1
Restricted Stock Awards And Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share based compensation expense	$ 51.8
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares (shares)	153,715
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)	12,616,206

Subsequent Events (Details Text

Subsequent Events (Details Textuals) - $ / shares	May. 16, 2016	May. 02, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Subsequent Event [Line Items]
Dividends declared per share (usd per share)			$ 0.50	$ 0.50	$ 0.5
Subsequent Event, Description			0
Subsequent Event
Subsequent Event [Line Items]
Dividends Payable, Date Declared		May 2, 2016
Dividends Payable, Date of Record	May 16, 2016
Dividend Declared [Member] | Subsequent Event
Subsequent Event [Line Items]
Dividends declared per share (usd per share)		$ 0.5