Zions Bancorporation, National Association (ZION) 10-Q 5 Aug 16 2016 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 29, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Trading Symbol	zion
Entity Registrant Name	ZIONS BANCORPORATION /UT/
Entity Central Index Key	109,380
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		205,110,866

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Held-to-maturity, fair value	$ 720,991	$ 552,088
ASSETS
Cash and due from banks	560,262	798,319
Money market investments:
Interest-bearing deposits	2,154,959	6,108,124
Federal funds sold and security resell agreements	620,469	619,758
Investment securities:
Held-to-maturity Securities	713,392	545,648
Available-for-sale, at fair value	9,477,089	7,643,116
Trading account, at fair value	118,775	48,168
Marketable securities, total	10,309,256	8,236,932
Loans held for sale	146,512	149,880
Loans held for investment, net allowance
Loans and leases, net of unearned income and fees	42,501,575	40,649,542
Allowance for loan losses	608,345	606,048
Loans held for investment, net of allowance	41,893,230	40,043,494
Other noninterest-bearing investments	850,578	848,144
Premises and equipment, net	955,540	905,462
Goodwill	1,014,129	1,014,129
Core deposit and other intangibles	12,281	16,272
Other real estate owned	8,354	7,092
Other assets	1,117,422	916,937
Total assets	59,642,992	59,664,543
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing demand	22,276,600	22,276,664
Interest-bearing:
Savings and money market	25,540,525	25,672,356
Time	2,336,088	2,130,680
Foreign	117,708	294,391
Total deposits	50,270,921	50,374,091
Federal funds and other short-term borrowings	270,255	346,987
Long-term debt	698,712	812,366
Reserve for unfunded lending commitments	64,780	74,838
Other liabilities	711,941	548,742
Total liabilities	52,016,609	52,157,024
Shareholders' equity:
Preferred stock, without par value, authorized 4,400,000 shares	709,601	828,490
Common stock, without par value; authorized 350,000,000 shares; issued and outstanding 205,103,566 and 204,417,093 shares	4,783,061	4,766,731
Retained earnings	2,110,069	1,966,910
Accumulated other comprehensive income (loss)	23,652	(54,612)
Total shareholders' equity	7,626,383	7,507,519
Total liabilities and shareholders' equity	$ 59,642,992	$ 59,664,543

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Held-to-maturity, fair value	$ 720,991	$ 552,088
Preferred stock, authorized shares	4,400,000	4,400,000
Common stock, authorized shares	350,000,000	350,000,000
Common stock, issued shares	205,103,566	204,417,093
Common stock, outstanding shares	205,103,566	204,417,093

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income:
Interest and fees on loans	$ 433,743	$ 420,642	$ 854,251	$ 836,397
Interest on money market investments	5,564	5,785	12,593	11,003
Interest on Securities	47,645	28,809	95,009	56,282
Interest on securities:
Total interest income	486,952	455,236	961,853	903,682
Interest expense:
Interest on deposits	11,869	12,321	23,714	24,425
Interest on short- and long-term borrowings	10,234	19,211	20,448	38,207
Total interest expense	22,103	31,532	44,162	62,632
Net interest income	464,849	423,704	917,691	841,050
Provision for loan losses	34,492	566	76,637	(928)
Net interest income after provision for loan losses	430,357	423,138	841,054	841,978
Noninterest income:
Service charges and fees on deposit accounts	42,108	41,616	83,369	82,810
Other service charges, commissions and fees	51,906	46,602	101,380	89,604
Wealth management income	8,788	8,160	16,742	15,775
Loan sales and servicing income	10,178	8,382	18,157	16,088
Capital markets and foreign exchange	4,545	7,275	10,212	12,776
Dividends and other investment income	6,226	9,343	10,865	18,715
Fair value and nonhedge derivative income (loss)	(1,910)	1,844	(4,495)	756
Equity securities gains (losses), net	2,709	4,839	2,159	8,192
Fixed income securities gains (losses), net	25	(138,436)	53	(138,675)
Other	1,142	5,693	4,036	6,615
Total noninterest income	125,717	(4,682)	242,478	112,656
Noninterest expense:
Salaries and employee benefits	241,341	251,133	499,679	494,652
Occupancy, net	29,621	30,095	59,400	59,434
Furniture, equipment and software	30,550	31,247	62,565	60,960
Other real estate expense, net	(527)	(445)	(1,856)	(71)
Credit-related expense	5,845	8,106	11,779	14,045
Provision for Unfunded Lending Commitments	4,246	2,326	10,058	1,115
Professional and legal services	12,229	13,110	23,700	24,593
Advertising	5,268	6,511	10,896	13,486
FDIC premiums	9,580	8,609	16,734	16,728
Amortization of core deposit and other intangibles	1,979	2,318	3,993	4,676
Debt extinguishment cost	106	2,395	353	2,395
Other	50,148	48,244	100,282	102,191
Total noninterest expense	381,894	398,997	777,467	791,974
Income before income taxes	174,180	19,459	306,065	162,660
Income taxes	60,231	5,499	101,679	56,675
Net income	113,949	13,960	204,386	105,985
Dividends on preferred stock	(13,543)	(15,060)	(25,203)	(31,806)
Preferred Stock Redemption	(9,759)	0	(9,759)	0
Net earnings applicable to common shareholders	$ 90,647	$ (1,100)	$ 169,424	$ 74,179
Weighted average common shares outstanding during the period:
Basic shares	204,236	202,888	204,113	202,746
Diluted shares	204,536	202,888	204,317	203,295
Net earnings per common share:
Basic	$ 0.44	$ (0.01)	$ 0.82	$ 0.36
Diluted	$ 0.44	$ (0.01)	$ 0.82	$ 0.36

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net income for the period	$ 113,949	$ 13,960	$ 204,386	$ 105,985
Other comprehensive income, net of tax:
Unrealized holding gains (losses) on investment securities	32,859	(7,294)	65,027	(6,808)
Reclassification of HTM securities to AFS Securities	0	0	0	10,938
Reclassification to earnings for realized net fixed income securities losses (gains)	(16)	85,664	(33)	85,812
Net unrealized gains (losses) on other noninterest-bearing investments	(566)	2,339	(136)	1,975
Net unrealized holding gains (losses) on derivative instruments	4,850	(219)	17,751	2,334
Reclassification adjustment for increase in interest income recognized in earnings on derivatives instruments	(1,822)	(753)	(3,680)	(1,382)
Pension and Postretirement	0	0	(665)	0
Other comprehensive income	35,305	79,737	78,264	92,869
Comprehensive income	$ 149,254	$ 93,697	282,650	198,854
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Other comprehensive income, net of tax:
Other comprehensive income			$ (665)	$ 0

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2014	$ 7,369,530	$ 1,004,011	$ 4,723,855	$ 1,769,705	$ (128,041)
Balance (in shares) at Dec. 31, 2014			203,014,903
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income for the period	105,985			105,985
Other comprehensive income, net of tax	92,869				92,869
Subordinated debt converted to preferred stock	15	21	$ (6)
Net activity under employee plans and related tax benefits	14,423		$ 14,423
Net activity under employee plans and related tax benefits, shares			726,011
Dividends on preferred stock	(31,806)			(31,806)
Dividends on common stock	(20,444)			(20,444)
Change in deferred compensation	(397)			(397)
Balance at Jun. 30, 2015	7,530,175	1,004,032	$ 4,738,272	1,823,043	(35,172)
Balance (in shares) at Jun. 30, 2015			203,740,914
Preferred Stock Redemption In Period	(126,144)	(118,889)	$ 2,504	(9,759)
Balance at Dec. 31, 2015	$ 7,507,519	828,490	$ 4,766,731	1,966,910	(54,612)
Balance (in shares) at Dec. 31, 2015	204,417,093		204,417,093
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income for the period	$ 204,386			204,386
Other comprehensive income, net of tax	78,264				78,264
Net activity under employee plans and related tax benefits	13,826		$ 13,826
Net activity under employee plans and related tax benefits, shares			686,473
Dividends on preferred stock	(25,203)			(25,203)
Dividends on common stock	(24,753)			(24,753)
Change in deferred compensation	(1,512)			(1,512)
Balance at Jun. 30, 2016	$ 7,626,383	$ 709,601	$ 4,783,061	$ 2,110,069	$ 23,652
Balance (in shares) at Jun. 30, 2016	205,103,566		205,103,566

Consolidated Statements Of Cha7

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Dividends on common stock, per share	$ 0.12	$ 0.10

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income for the period	$ 113,949	$ 13,960	$ 204,386	$ 105,985
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	30,246	(1,760)	66,579	(2,043)
Depreciation and amortization	45,297	35,113	86,033	69,282
Fixed income securities losses (gains), net	25	(138,436)	53	(138,675)
Deferred income tax benefit	(6,109)	(44,431)	(10,789)	(41,029)
Net increase in trading securities	(52,937)	(2,899)	(70,607)	(3,920)
Net decrease (increase) in loans held for sale	(35,309)	(23,568)	3,257	(20,051)
Change in other liabilities	144,867	(61,829)	162,637	(36,263)
Change in other assets	(225,202)	32,079	(217,901)	(33,169)
Other, net	(2,973)	(70)	11,024	(3,619)
Net cash provided by operating activities	11,804	85,031	234,566	173,848
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease (increase) in money market investments	1,850,874	(754,443)	3,952,454	(501,169)
Proceeds from maturities and paydowns of investment securities held-to-maturity	10,415	21,587	32,451	60,910
Purchases of investment securities held-to-maturity	(92,161)	(1,485)	(200,302)	(24,061)
Proceeds from sales, maturities, and paydowns of investment securities available-for-sale	475,056	751,373	2,573,582	980,267
Purchases of investment securities available-for-sale	(1,243,709)	(972,714)	(4,366,953)	(1,757,570)
Loans purchased	104,066	0	104,066	0
Other net change in loans held for investment	(1,018,557)	148,336	(1,826,915)	47,894
Purchases of premises and equipment	(51,859)	(33,835)	(91,874)	(67,368)
Proceeds from sales of other real estate owned	4,437	5,172	8,741	8,573
Other, net	10,825	25,974	260	29,325
Net cash used in investing activities	(158,745)	(810,035)	(22,622)	(1,223,199)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposits	406,633	813,764	(79,601)	1,089,049
Net change in short-term funds borrowed	38,067	23,527	(76,732)	(17,099)
Cash paid for preferred stock redemptionred Stock	126,144	0	126,144	0
Repayments of long-term debt	(104,447)	(44,420)	(115,083)	(52,605)
Proceeds from issuances of common stock	2,948	5,070	3,486	6,032
Dividends paid on common and preferred stock	(22,795)	(29,045)	(50,216)	(52,279)
Other, net	(4,862)	(6,512)	(5,711)	(7,451)
Net cash provided by (used in) financing activities	189,400	762,384	(450,001)	965,647
Net increae (decrease) in cash and due from banks	42,459	37,380	(238,057)	(83,704)
Cash and due from banks at beginning of period	517,803	720,858	798,319	841,942
Cash and due from banks at end of period	560,262	758,238	560,262	758,238
Cash paid for interest	24,622	28,938	43,052	51,057
Net cash paid for income taxes	$ 101,512	$ 92,326	$ 101,428	$ 91,826

Basis of Presentaion

Basis of Presentaion	6 Months Ended
	Jun. 30, 2016
Basis Of Presentation [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements of Zions Bancorporation (“the Parent”) and its majority-owned subsidiaries (collectively “the Company,” “Zions,” “we,” “our,” “us”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. References to GAAP, including standards promulgated by the Financial Accounting Standards Board (“FASB”), are made according to sections of the Accounting Standards Codification (“ASC”). Changes to the ASC are made with Accounting Standards Updates (“ASU”) that include consensus issues of the Emerging Issues Task Force (“EITF”). In certain cases, ASUs are issued jointly with International Financial Reporting Standards (“IFRS”). Operating results for the three and six months ended June 30, 2016 and 2015 are not necessarily indicative of the results that may be expected in future periods. In preparing the consolidated financial statements, we are required to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. The consolidated balance sheet at December 31, 2015 is from the audited financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s 2015 Annual Report on Form 10-K. Certain prior period amounts have been reclassified to conform with the current period presentation. These reclassifications did not affect net income or shareholders’ equity. Zions Bancorporation is a financial holding company headquartered in Salt Lake City, Utah, and with its subsidiaries, provides a full range of banking and related services. Following the close of business on December 31, 2015, the Company completed the merger of its subsidiary banks and other subsidiaries into a single bank, ZB, N.A. The Company continues to manage its banking operations through seven separately managed and branded segments in 11 Western and Southwestern states as follows: Zions Bank, in Utah, Idaho and Wyoming; Amegy Bank (“Amegy”), in Texas; California Bank & Trust (“CB&T”); National Bank of Arizona (“NBAZ”); Nevada State Bank (“NSB”); Vectra Bank Colorado (“Vectra”), in Colorado and New Mexico; and The Commerce Bank of Washington (“TCBW”), in Washington and Oregon. Pursuant to a Board resolution adopted November 21, 2014, The Commerce Bank of Oregon merged into TCBW following the close of business on March 31, 2015.

Certain Recent Accounting Prono

Certain Recent Accounting Pronouncements (Notes)	6 Months Ended
	Jun. 30, 2016
Certain Recent Accounting Pronouncements [Abstract]
Certain Recent Accounting Pronouncements [Text Block]	RECENT ACCOUNTING PRONOUNCEMENTS Standard Description Date of adoption Effect on the financial statements or other significant matters Standards not yet adopted by the Company ASU 2016-09, Stock Compensation (Topic 718): Improvements to Share-Based Payment Accounting The standard requires entities to recognize the income tax effects of share-based payment awards in the income statement when the awards vest or are settled (i.e. the additional paid-in capital pools will be eliminated). The guidance on employers’ accounting for an employee’s use of shares to satisfy the employer’s statutory income tax withholding obligation and for forfeitures is changing. The standard also provides an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. January 1, 2017 We are currently evaluating the potential impact of this new guidance on the Company’s financial statements. ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities The standard provides revised accounting guidance related to the accounting for and reporting of financial instruments. Some of the main provisions include: January 1, 2018 We do not currently expect this new guidance will have a material impact on the Company’s financial statements. ASU 2014-09, Revenue from Contracts with Customers (Topic 606), and subsequent related ASUs The core principle of the new guidance is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The banking industry does not expect significant changes because major sources of revenue are from financial instruments that have been excluded from the scope of the new standard, (including loans, derivatives, debt and equity securities, etc.). However, these new standards affect other fees charged by banks, such as asset management fees, credit card interchange fees, deposit account fees, etc. Adoption may be made on a full retrospective basis with practical expedients, or on a modified retrospective basis with a cumulative effect adjustment. Early adoption of the guidance is permitted as of January 1, 2017. January 1, 2018 While we currently do not expect these standards will have a material impact on the Company’s financial statements, we are still in process of conducting our evaluation. ASU 2016-02, Leases (Topic 842) The standard requires that a lessee recognize assets and liabilities for leases with lease terms of more than 12 months. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee primarily will depend on its classification as a finance or operating lease. However, the standard will require both types of leases to be recognized on the balance sheet. It also requires disclosures to better understand the amount, timing, and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative requirements, providing additional information about the amounts recorded in the financial statements. January 1, 2019 We are currently evaluating the potential impact of this new guidance on the Company’s financial statements. Standard Description Date of adoption Effect on the financial statements or other significant matters Standards not yet adopted by the Company (continued) ASU 2016-13, The standard significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard replaces today’s “incurred loss” approach with an “expected loss” model for instruments such as loans and held-to-maturity securities that are measured at amortized cost. The standard requires credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses rather than a reduction of the carrying amount. It also changes the accounting for purchased credit-impaired debt securities and loans. The standard retains many of the current disclosure requirements in current GAAP and expands certain disclosure requirements. Early adoption of the guidance is permitted as of January 1, 2019. January 1, 2020 While we expect this standard will have a material impact on the Company’s financial statements, we are still in process of conducting our evaluation. Standards adopted by the Company ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis The new standard changes certain criteria in the variable interest model and the voting model to determine whether certain legal entities are variable interest entities (“VIEs”) and whether they should be consolidated. Additional disclosures are required for entities not currently considered VIEs, but may become VIEs under the new guidance and may be subject to consolidation. Adoption may be retrospective or modified retrospective with a cumulative effect adjustment. January 1, 2016 We currently do not consolidate any VIEs and our adoption of this standard did not have a material impact on the Company’s financial statements. ASU 2015-03, Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs The standard requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of the associated debt liability, consistent with debt discounts. Adoption is retrospective. January 1, 2016 Our adoption of this standard did not have a material impact on the accompanying financial statements. ASU 2015-05, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement The standard provides guidance to determine whether an arrangement includes a software license. If it does, the customer accounts for it the same way as for other software licenses. If no software license is included, the customer accounts for it as a service contract. Adoption may be retrospective or prospective. January 1, 2016 We adopted this standard on a prospective basis and it did not have a material impact on the accompanying financial statements. ASU 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or its Equivalent) The guidance eliminates the current requirement to categorize within the fair value hierarchy investments whose fair values are measured at net asset value (“NAV”) using the practical expedient in ASC 820. Fair value disclosure of these investments will be made to facilitate reconciliation to amounts reported on the balance sheet. Other related disclosures will continue when the NAV practical expedient is used. Adoption is retrospective. January 1, 2016 Our adoption of this standard did not have a material impact on the accompanying financial statements.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2016
Supplemental Cash Flow Information [Abstract]
Cash Flow, Supplemental Disclosures [Text Block]	. SUPPLEMENTAL CASH FLOW INFORMATION Noncash activities are summarized as follows: (In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 Loans held for investment transferred to other real estate owned $ 1,318 $ 3,084 $ 7,316 $ 6,652 Loans held for sale reclassified to (from) loans held for investment 1,912 (2,395 ) 3,888 10,743 Adjusted cost of HTM securities reclassified as AFS securities — — — 79,276

Offsetting Assets and Liabiliti

Offsetting Assets and Liabilities (Notes)	6 Months Ended
	Jun. 30, 2016
Offsetting Assets and Liabilities [Abstract]
Cash, Cash Equivalents, and Short-term Investments [Text Block]	OFFSETTING ASSETS AND LIABILITIES Gross and net information for selected financial instruments in the balance sheet is as follows: June 30, 2016 (In thousands) Gross amounts not offset in the balance sheet Description Gross amounts recognized Gross amounts offset in the balance sheet Net amounts presented in the balance sheet Financial instruments Cash collateral received/pledged Net amount Assets: Federal funds sold and security resell agreements $ 620,469 $ — $ 620,469 $ — $ — $ 620,469 Derivatives (included in other assets) 152,466 — 152,466 (28,496 ) — 123,970 $ 772,935 $ — $ 772,935 $ (28,496 ) $ — $ 744,439 Liabilities: Federal funds and other short-term borrowings $ 270,255 $ — $ 270,255 $ — $ — $ 270,255 Derivatives (included in other liabilities) 127,757 — 127,757 (28,496 ) (89,151 ) 10,110 $ 398,012 $ — $ 398,012 $ (28,496 ) $ (89,151 ) $ 280,365 December 31, 2015 (In thousands) Gross amounts not offset in the balance sheet Description Gross amounts recognized Gross amounts offset in the balance sheet Net amounts presented in the balance sheet Financial instruments Cash collateral received/pledged Net amount Assets: Federal funds sold and security resell agreements $ 619,758 $ — $ 619,758 $ — $ — $ 619,758 Derivatives (included in other assets) 77,638 — 77,638 (6,990 ) 70,648 $ 697,396 $ — $ 697,396 $ (6,990 ) $ — $ 690,406 Liabilities: Federal funds and other short-term borrowings $ 346,987 $ — $ 346,987 $ — $ — $ 346,987 Derivatives (included in other liabilities) 72,568 — 72,568 (6,990 ) (60,923 ) 4,655 $ 419,555 $ — $ 419,555 $ (6,990 ) $ (60,923 ) $ 351,642 Security repurchase and reverse repurchase (“resell”) agreements are offset, when applicable, in the balance sheet according to master netting agreements. Security repurchase agreements are included with “Federal funds and other short-term borrowings.” Derivative instruments may be offset under their master netting agreements; however, for accounting purposes, we present these items on a gross basis in the Company’s balance sheet. See Note 7 for further information regarding derivative instruments.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2016
Investments [Abstract]
Investment Securities	INVESTMENTS Investment Securities Investment securities are summarized below. Note 10 discusses the process to estimate fair value for investment securities. June 30, 2016 (In thousands) Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 713,392 $ 12,522 $ 4,923 $ 720,991 Available-for-sale U.S. Government agencies and corporations: Agency securities 1,668,158 28,570 600 1,696,128 Agency guaranteed mortgage-backed securities 4,869,173 46,097 4,827 4,910,443 Small Business Administration loan-backed securities 2,092,969 11,383 14,930 2,089,422 Municipal securities 659,432 14,144 309 673,267 Other debt securities 25,402 141 3,987 21,556 9,315,134 100,335 24,653 9,390,816 Money market mutual funds and other 86,156 117 — 86,273 9,401,290 100,452 24,653 9,477,089 Total $ 10,114,682 $ 112,974 $ 29,576 $ 10,198,080 December 31, 2015 (In thousands) Amortized Gross unrealized gains Gross unrealized losses Estimated Held-to-maturity Municipal securities $ 545,648 $ 11,218 $ 4,778 $ 552,088 Available-for-sale U.S. Government agencies and corporations: Agency securities 1,231,740 4,313 2,658 1,233,395 Agency guaranteed mortgage-backed securities 3,964,593 7,919 36,037 3,936,475 Small Business Administration loan-backed securities 1,932,817 12,602 14,445 1,930,974 Municipal securities 417,374 2,177 856 418,695 Other debt securities 25,454 152 2,665 22,941 7,571,978 27,163 56,661 7,542,480 Money market mutual funds and other 100,612 61 37 100,636 7,672,590 27,224 56,698 7,643,116 Total $ 8,218,238 $ 38,442 $ 61,476 $ 8,195,204 CDO Sales and Paydowns During the second quarter of 2015 , we sold the remaining portfolio of our collateralized debt obligation (“CDO”) securities, or $574 million at amortized cost, and realized net losses of approximately $137 million . During the first quarter of 2015 , we reclassified all of the remaining held-to-maturity (“HTM”) CDO securities, or approximately $79 million at amortized cost, to Available-for-Sale (“AFS”) securities. The reclassification resulted from increased risk weights for these securities under the new Basel III capital rules, and was made in accordance with applicable accounting guidance that allows for such reclassifications when increased risk weights of debt securities must be used for regulatory risk-based capital purposes. No gain or loss was recognized in the statement of income at the time of reclassification. Maturities The amortized cost and estimated fair value of investment debt securities are shown subsequently as of June 30, 2016 by expected timing of principal payments. Actual principal payments may differ from contractual or expected principal payments because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Held-to-maturity Available-for-sale (In thousands) Amortized cost Estimated fair value Amortized cost Estimated fair value Principal return in one year or less $ 72,693 $ 72,938 $ 1,295,398 $ 1,305,827 Principal return after one year through five years 247,119 251,539 3,773,685 3,801,514 Principal return after five years through ten years 234,328 239,120 2,720,386 2,753,721 Principal return after ten years 159,252 157,394 1,525,665 1,529,754 $ 713,392 $ 720,991 $ 9,315,134 $ 9,390,816 The following is a summary of the amount of gross unrealized losses for investment securities and the estimated fair value by length of time the securities have been in an unrealized loss position: June 30, 2016 Less than 12 months 12 months or more Total (In thousands) Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 4,280 $ 145,639 $ 643 $ 12,387 $ 4,923 $ 158,026 Available-for-sale U.S. Government agencies and corporations: Agency securities 87 23,856 513 125,850 600 149,706 Agency guaranteed mortgage-backed securities 1,004 271,185 3,823 386,971 4,827 658,156 Small Business Administration loan-backed securities 4,256 582,167 10,674 552,261 14,930 1,134,428 Municipal securities 45 24,682 264 13,879 309 38,561 Other — — 3,987 11,016 3,987 11,016 5,392 901,890 19,261 1,089,977 24,653 1,991,867 Mutual funds and other — — — — — — 5,392 901,890 19,261 1,089,977 24,653 1,991,867 Total $ 9,672 $ 1,047,529 $ 19,904 $ 1,102,364 $ 29,576 $ 2,149,893 December 31, 2015 Less than 12 months 12 months or more Total (In thousands) Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 4,521 $ 122,197 $ 257 $ 13,812 $ 4,778 $ 136,009 Available-for-sale U.S. Government agencies and corporations: Agency securities 2,176 559,196 482 131,615 2,658 690,811 Agency guaranteed mortgage-backed securities 34,583 3,639,824 1,454 65,071 36,037 3,704,895 Small Business Administration loan-backed securities 5,348 567,365 9,097 535,376 14,445 1,102,741 Municipal securities 735 102,901 121 5,733 856 108,634 Other — — 2,665 12,337 2,665 12,337 42,842 4,869,286 13,819 750,132 56,661 5,619,418 Mutual funds and other 37 35,488 — — 37 35,488 42,879 4,904,774 13,819 750,132 56,698 5,654,906 Total $ 47,400 $ 5,026,971 $ 14,076 $ 763,944 $ 61,476 $ 5,790,915 At June 30, 2016 and December 31, 2015 , respectively, 135 and 187 HTM and 470 and 709 AFS investment securities were in an unrealized loss position. Other-Than-Temporary Impairment Ongoing Policy We review investment securities on a quarterly basis for the presence of other-than-temporary impairment (“OTTI”). We assess whether OTTI is present when the fair value of a debt security is less than its amortized cost basis at the balance sheet date (the majority of the investment portfolio are debt securities). Under these circumstances, OTTI is considered to have occurred if (1) we have formed a documented intent to sell identified securities or initiated such sales; (2) it is “more likely than not” we will be required to sell the security before recovery of its amortized cost basis; or (3) the present value of expected cash flows is not sufficient to recover the entire amortized cost basis. Noncredit-related OTTI in securities we intend to sell is recognized in earnings as is any credit-related OTTI in securities, regardless of our intent. Noncredit-related OTTI on AFS securities not expected to be sold is recognized in other comprehensive income (“OCI”). The amount of noncredit-related OTTI in a security is quantified as the difference in a security’s amortized cost after adjustment for credit impairment, and its lower fair value. Presentation of OTTI is made in the statement of income on a gross basis with an offset for the amount of OTTI recognized in OCI. OTTI Conclusions Our 2015 Annual Report on Form 10-K describes in more detail our OTTI evaluation process. The following summarizes the conclusions from our OTTI evaluation by each security type that has significant gross unrealized losses at June 30, 2016 : Small Business Administration (“SBA”) Loan-Backed Securities: These securities were generally purchased at premiums with maturities from 5 to 25 years and have principal cash flows guaranteed by the SBA. Unrealized losses relate to changes in interest rates subsequent to purchase and are not attributable to credit. At June 30, 2016 , we did not have an intent to sell identified SBA securities with unrealized losses or initiate such sales, and we believe it is more likely than not we would not be required to sell such securities before recovery of their amortized cost basis. Therefore, we did not record OTTI for these securities during the second quarter of 2016 . The following is a tabular rollforward of the total amount of credit-related OTTI: (In thousands) Three Months Ended Six Months Ended HTM AFS Total HTM AFS Total Balance of credit-related OTTI at beginning of period $ — $ — $ — $ — $ — $ — Reductions for securities sold or paid off during the period — — — — — — Reclassification of securities from HTM to AFS — — — — — — Balance of credit-related OTTI at end of period $ — $ — $ — $ — $ — $ — (In thousands) Three Months Ended Six Months Ended HTM AFS Total HTM AFS Total Balance of credit-related OTTI at beginning of period $ — $ (103,238 ) $ (103,238 ) $ (9,079 ) $ (95,472 ) $ (104,551 ) Reductions for securities sold or paid off during the period — 103,238 103,238 — 104,551 104,551 Reclassification of securities from HTM to AFS — — — 9,079 (9,079 ) — Balance of credit-related OTTI at end of period $ — $ — $ — $ — $ — $ — The following summarizes gains and losses, including OTTI, that were recognized in the statement of income: Three Months Ended Six Months Ended June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 (In thousands) Gross gains Gross losses Gross gains Gross losses Gross gains Gross losses Gross gains Gross losses Investment securities: Held-to-maturity $ — $ — $ — $ — $ — $ — $ 1 $ — Available-for-sale 30 5 7,402 146,315 60 7 8,360 147,513 Other noninterest-bearing investments 2,711 2 6,008 692 5,898 3,739 9,603 934 2,741 7 13,410 147,007 5,958 3,746 17,964 148,447 Net gains (losses) $ 2,734 $ (133,597 ) $ 2,212 $ (130,483 ) Statement of income information: Equity securities gains, net $ 2,709 $ 4,839 $ 2,159 $ 8,192 Fixed income securities gains (losses), net 25 (138,436 ) 53 (138,675 ) Net gains (losses) $ 2,734 $ (133,597 ) $ 2,212 $ (130,483 ) Interest income by security type is as follows: (In thousands) Three Months Ended Six Months Ended Taxable Nontaxable Total Taxable Nontaxable Total Investment securities: Held-to-maturity $ 2,572 $ 3,158 $ 5,730 $ 5,176 $ 5,884 $ 11,060 Available-for-sale 38,577 2,581 41,158 78,184 4,536 82,720 Trading 757 — 757 1,229 — 1,229 $ 41,906 $ 5,739 $ 47,645 $ 84,589 $ 10,420 $ 95,009 (In thousands) Three Months Ended Six Months Ended Taxable Nontaxable Total Taxable Nontaxable Total Investment securities: Held-to-maturity $ 3,093 $ 2,774 $ 5,867 $ 6,685 $ 5,636 $ 12,321 Available-for-sale 21,637 695 22,332 41,405 1,348 42,753 Trading 610 — 610 1,208 — 1,208 $ 25,340 $ 3,469 $ 28,809 $ 49,298 $ 6,984 $ 56,282 Investment securities with a carrying value of $1.7 billion at June 30, 2016 and $2.3 billion at December 31, 2015 were pledged to secure public and trust deposits, advances, and for other purposes as required by law. Securities are also pledged as collateral for security repurchase agreements. Private Equity Investments Effect of Volcker Rule The Volcker Rule, as published pursuant to the Dodd-Frank Act in December 2013 and amended in January 2014, significantly restricted certain activities by covered bank holding companies, including restrictions on certain types of securities, proprietary trading, and private equity investing. The Company’s private equity investments (“PEIs”) consist of Small Business Investment Companies (“SBICs”) and non-SBICs. Following the sales of its CDO securities, the only prohibited investments under the Volcker Rule requiring divestiture by the Company were certain of its PEIs. Of the recorded PEIs of $133 million at June 30, 2016 , approximately $7 million remain prohibited by the Volcker Rule. As of June 30, 2016 we have sold a total of $18 million of PEIs during 2016 and 2015 as follows: $9 million during 2016 and $9 million during 2015 . All of these sales were related to prohibited PEIs and resulted in insignificant amounts of realized gains or losses. We will dispose of the remaining $7 million of prohibited PEIs before the required deadline, which has been extended to July 21, 2017. See other discussions in Notes 10 and 11. As discussed in Note 11, we have $20 million at June 30, 2016 of unfunded commitments for PEIs, of which approximately $2 million relate to prohibited PEIs. Until we dispose of the prohibited PEIs, we expect to fund these commitments if and as the capital calls are made, as allowed under the Volcker Rule.

Loans And Allowance For Credit

Loans And Allowance For Credit Losses	6 Months Ended
	Jun. 30, 2016
Loans And Allowance For Credit Losses [Abstract]
Loans And Allowance For Credit Losses	LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans and Loans Held for Sale Loans are summarized as follows according to major portfolio segment and specific loan class: (In thousands) June 30, December 31, Loans held for sale $ 146,512 $ 149,880 Commercial: Commercial and industrial $ 13,757,123 $ 13,211,481 Leasing 426,449 441,666 Owner occupied 6,988,647 7,150,028 Municipal 756,145 675,839 Total commercial 21,928,364 21,479,014 Commercial real estate: Construction and land development 2,088,250 1,841,502 Term 9,229,683 8,514,401 Total commercial real estate 11,317,933 10,355,903 Consumer: Home equity credit line 2,507,176 2,416,357 1-4 family residential 5,680,050 5,382,099 Construction and other consumer real estate 419,299 385,240 Bankcard and other revolving plans 459,707 443,780 Other 189,046 187,149 Total consumer 9,255,278 8,814,625 Total loans $ 42,501,575 $ 40,649,542 Loan balances are presented net of unearned income and fees, which amounted to $149.7 million at June 30, 2016 and $150.3 million at December 31, 2015 . Owner occupied and commercial real estate (“CRE”) loans include unamortized premiums of approximately $23.0 million at June 30, 2016 and $26.2 million at December 31, 2015 . Municipal loans generally include loans to municipalities with the debt service being repaid from general funds or pledged revenues of the municipal entity, or to private commercial entities or 501(c)(3) not-for-profit entities utilizing a pass-through municipal entity to achieve favorable tax treatment. Land development loans included in the construction and land development loan class were $280.5 million at June 30, 2016 and $288.0 million at December 31, 2015 . Loans with a carrying value of approximately $26.0 billion at June 30, 2016 have been pledged at the Federal Reserve and the Federal Home Loan Bank (“FHLB”) of Des Moines as collateral for current and potential borrowings compared to $19.4 billion at December 31, 2015 at the Federal Reserve and various FHLBs. We sold loans totaling $317.5 million and $590.7 million for the three and six months ended June 30, 2016 , and $335.8 million and $636.2 million for the three and six months ended June 30, 2015 , respectively, that were classified as loans held for sale. The sold loans were derecognized from the balance sheet. Loans classified as loans held for sale primarily consist of conforming residential mortgages and the guaranteed portion of SBA loans. Amounts added to loans held for sale during these periods were $356.9 million and $592.6 million for the three and six months ended June 30, 2016 , and $359.0 million and $668.7 million for the three and six months ended June 30, 2015 , respectively. The principal balance of sold loans for which we retain servicing was approximately $1.2 billion at June 30, 2016 and $1.3 billion at December 31, 2015 . Income from loans sold, excluding servicing, was $5.9 million and $8.9 million for the three and six months ended June 30, 2016 , and $4.3 million and $8.9 million for the three and six months ended June 30, 2015 , respectively. Allowance for Credit Losses The allowance for credit losses (“ACL”) consists of the allowance for loan and lease losses (“ALLL”) (also referred to as the allowance for loan losses) and the reserve for unfunded lending commitments (“RULC”). Allowance for Loan and Lease Losses The ALLL represents our estimate of probable and estimable losses inherent in the loan and lease portfolio as of the balance sheet date. Losses are charged to the ALLL when recognized. Generally, commercial and CRE loans are charged off or charged down when they are determined to be uncollectible in whole or in part, or when 180 days past due unless the loan is well secured and in process of collection. Consumer loans are either charged off or charged down to net realizable value no later than the month in which they become 180 days past due. Closed-end consumer loans that are not secured by residential real estate are either charged off or charged down to net realizable value no later than the month in which they become 120 days past due. We establish the amount of the ALLL by analyzing the portfolio at least quarterly, and we adjust the provision for loan losses so the ALLL is at an appropriate level at the balance sheet date. We determine our ALLL as the best estimate within a range of estimated losses. The methodologies we use to estimate the ALLL depend upon the impairment status and loan portfolio. The methodology for impaired loans is discussed subsequently. For commercial and CRE loans with commitments equal to or greater than $750,000 , we assign internal risk grades using a comprehensive loan grading system based on financial and statistical models, individual credit analysis, and loan officer experience and judgment. The credit quality indicators discussed subsequently are based on this grading system. Estimated losses for these commercial and CRE loans are derived from a statistical analysis of our historical default and loss given default (“LGD”) experience over the period of January 2008 through the most recent full quarter. For consumer and small commercial and CRE loans with commitments less than $750,000 , we primarily use roll rate models to forecast probable inherent losses. Roll rate models measure the rate at which these loans migrate from one delinquency category to the next worse delinquency category, and eventually to loss. We estimate roll rates for these loans using recent delinquency and loss experience by segmenting our loan portfolios into separate pools based on common risk characteristics and separately calculating historical delinquency and loss experience for each pool. These roll rates are then applied to current delinquency levels to estimate probable inherent losses. The current status and historical changes in qualitative and environmental factors may not be reflected in our quantitative models. Thus, after applying historical loss experience, as described above, we review the quantitatively derived level of ALLL for each segment using qualitative criteria and use those criteria to determine our estimate within the range. We track various risk factors that influence our judgment regarding the level of the ALLL across the portfolio segments. These factors primarily include: • Changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, and recovery practices • Changes in international, national, regional, and local economic and business conditions • Changes in the nature and volume of the portfolio and in the terms of loans • Changes in the experience, ability, and depth of lending management and other relevant staff • Changes in the volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans • Changes in the quality of the loan review system • Changes in the value of underlying collateral for collateral-dependent loans • The existence and effect of any concentration of credit, and changes in the level of such concentrations • The effect of other external factors such as competition and legal and regulatory requirements The magnitude of the impact of these factors on our qualitative assessment of the ALLL changes from quarter to quarter according to changes made by management in its assessment of these factors, the extent these factors are already reflected in historic loss rates, and the extent changes in these factors diverge from one to another. We also consider the uncertainty inherent in the estimation process when evaluating the ALLL. Reserve for Unfunded Lending Commitments We also estimate a reserve for potential losses associated with off-balance sheet commitments, including standby letters of credit. We determine the RULC using the same procedures and methodologies that we use for the ALLL. The loss factors used in the RULC are the same as the loss factors used in the ALLL, and the qualitative adjustments used in the RULC are the same as the qualitative adjustments used in the ALLL. We adjust the Company’s unfunded lending commitments that are not unconditionally cancelable to an outstanding amount equivalent using credit conversion factors, and we apply the loss factors to the outstanding equivalents. Changes in ACL Assumptions During the first quarter of 2016, due to the consolidation of our separate banking charters, we enhanced our methodology to estimate the ACL on a Company-wide basis. As described previously, for large commercial and CRE loans, we began estimating historic loss factors by separately calculating historic default and LGD rates, instead of directly calculating loss rates for groupings of probability of default and LGD grades using a loss migration approach. For small commercial and CRE loans, we began using roll rate models to forecast probable inherent losses. For consumer loans, we began pooling loans by current loan-to-value, where applicable. The impact of these changes was largely neutral to the total ACL at implementation. Changes in the allowance for credit losses are summarized as follows: Three Months Ended June 30, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 463,987 $ 117,712 $ 30,195 $ 611,894 Additions: Provision for loan losses 25,186 9,621 (315 ) 34,492 Deductions: Gross loan and lease charge-offs (46,635 ) (7,839 ) (3,155 ) (57,629 ) Recoveries 14,526 2,073 2,989 19,588 Net loan and lease charge-offs (32,109 ) (5,766 ) (166 ) (38,041 ) Balance at end of period $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments Balance at beginning of period $ 56,267 $ 12,759 $ — $ 69,026 Provision credited to earnings (2,744 ) (1,502 ) — (4,246 ) Balance at end of period $ 53,523 $ 11,257 $ — $ 64,780 Total allowance for credit losses at end of period Allowance for loan losses $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments 53,523 11,257 — 64,780 Total allowance for credit losses $ 510,587 $ 132,824 $ 29,714 $ 673,125 Six Months Ended June 30, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 454,277 $ 113,992 $ 37,779 $ 606,048 Additions: Provision for loan losses 71,061 11,322 (5,746 ) 76,637 Deductions: Gross loan and lease charge-offs (89,865 ) (8,814 ) (7,060 ) (105,739 ) Recoveries 21,591 5,067 4,741 31,399 Net loan and lease charge-offs (68,274 ) (3,747 ) (2,319 ) (74,340 ) Balance at end of period $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments Balance at beginning of period $ 57,696 $ 16,526 $ 616 $ 74,838 Provision credited to earnings (4,173 ) (5,269 ) (616 ) (10,058 ) Balance at end of period $ 53,523 $ 11,257 $ — $ 64,780 Total allowance for credit losses at end of period Allowance for loan losses $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments 53,523 11,257 — 64,780 Total allowance for credit losses $ 510,587 $ 132,824 $ 29,714 $ 673,125 Three Months Ended June 30, 2015 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 442,072 $ 131,615 $ 46,326 $ 620,013 Additions: Provision for loan losses 5,941 (4,983 ) (392 ) 566 Adjustment for FDIC-supported/PCI loans (19 ) 57 — 38 Deductions: Gross loan and lease charge-offs (23,822 ) (3,943 ) (3,283 ) (31,048 ) Recoveries 13,598 3,050 3,158 19,806 Net loan and lease charge-offs (10,224 ) (893 ) (125 ) (11,242 ) Balance at end of period $ 437,770 $ 125,796 $ 45,809 $ 609,375 Reserve for unfunded lending commitments Balance at beginning of period $ 62,775 $ 18,937 $ 575 $ 82,287 Provision credited to earnings (2,001 ) (298 ) (27 ) (2,326 ) Balance at end of period $ 60,774 $ 18,639 $ 548 $ 79,961 Total allowance for credit losses at end of period Allowance for loan losses $ 437,770 $ 125,796 $ 45,809 $ 609,375 Reserve for unfunded lending commitments 60,774 18,639 548 79,961 Total allowance for credit losses $ 498,544 $ 144,435 $ 46,357 $ 689,336 Six Months Ended June 30, 2015 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 412,514 $ 145,009 $ 47,140 $ 604,663 Additions: Provision for loan losses 30,875 (31,870 ) 67 (928 ) Adjustment for FDIC-supported/PCI loans (57 ) 57 — — Deductions: Gross loan and lease charge-offs (39,773 ) (4,569 ) (6,894 ) (51,236 ) Recoveries 34,211 17,169 5,496 56,876 Net loan and lease charge-offs (5,562 ) 12,600 (1,398 ) 5,640 Balance at end of period $ 437,770 $ 125,796 $ 45,809 $ 609,375 Reserve for unfunded lending commitments Balance at beginning of period $ 58,931 $ 21,517 $ 628 $ 81,076 Provision charged (credited) to earnings 1,843 (2,878 ) (80 ) (1,115 ) Balance at end of period $ 60,774 $ 18,639 $ 548 $ 79,961 Total allowance for credit losses at end of period Allowance for loan losses $ 437,770 $ 125,796 $ 45,809 $ 609,375 Reserve for unfunded lending commitments 60,774 18,639 548 79,961 Total allowance for credit losses $ 498,544 $ 144,435 $ 46,357 $ 689,336 The ALLL and outstanding loan balances according to the Company’s impairment method are summarized as follows: June 30, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses: Individually evaluated for impairment $ 53,644 $ 3,648 $ 6,796 $ 64,088 Collectively evaluated for impairment 402,559 117,288 22,890 542,737 Purchased loans with evidence of credit deterioration 861 631 28 1,520 Total $ 457,064 $ 121,567 $ 29,714 $ 608,345 Outstanding loan balances: Individually evaluated for impairment $ 452,250 $ 102,806 $ 78,307 $ 633,363 Collectively evaluated for impairment 21,432,102 11,170,511 9,168,216 41,770,829 Purchased loans with evidence of credit deterioration 44,012 44,616 8,755 97,383 Total $ 21,928,364 $ 11,317,933 $ 9,255,278 $ 42,501,575 December 31, 2015 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses: Individually evaluated for impairment $ 36,909 $ 3,154 $ 9,462 $ 49,525 Collectively evaluated for impairment 417,295 110,417 27,866 555,578 Purchased loans with evidence of credit deterioration 73 421 451 945 Total $ 454,277 $ 113,992 $ 37,779 $ 606,048 Outstanding loan balances: Individually evaluated for impairment $ 289,629 $ 107,341 $ 92,605 $ 489,575 Collectively evaluated for impairment 21,129,125 10,193,840 8,712,079 40,035,044 Purchased loans with evidence of credit deterioration 60,260 54,722 9,941 124,923 Total $ 21,479,014 $ 10,355,903 $ 8,814,625 $ 40,649,542 Nonaccrual and Past Due Loans Loans are generally placed on nonaccrual status when payment in full of principal and interest is not expected, or the loan is 90 days or more past due as to principal or interest, unless the loan is both well secured and in the process of collection. Factors we consider in determining whether a loan is placed on nonaccrual include delinquency status, collateral value, borrower or guarantor financial statement information, bankruptcy status, and other information which would indicate that the full and timely collection of interest and principal is uncertain. A nonaccrual loan may be returned to accrual status when all delinquent interest and principal become current in accordance with the terms of the loan agreement; the loan, if secured, is well secured; the borrower has paid according to the contractual terms for a minimum of six months; and analysis of the borrower indicates a reasonable assurance of the ability and willingness to maintain payments. Payments received on nonaccrual loans are applied as a reduction to the principal outstanding. Closed-end loans with payments scheduled monthly are reported as past due when the borrower is in arrears for two or more monthly payments. Similarly, open-end credit such as charge-card plans and other revolving credit plans are reported as past due when the minimum payment has not been made for two or more billing cycles. Other multi-payment obligations (i.e., quarterly, semiannual, etc.), single payment, and demand notes are reported as past due when either principal or interest is due and unpaid for a period of 30 days or more. Nonaccrual loans are summarized as follows: (In thousands) June 30, December 31, Loans held for sale $ 13,570 $ — Commercial: Commercial and industrial $ 340,883 $ 163,906 Leasing 13,914 3,829 Owner occupied 69,646 73,881 Municipal 893 951 Total commercial 425,336 242,567 Commercial real estate: Construction and land development 4,610 7,045 Term 51,209 40,253 Total commercial real estate 55,819 47,298 Consumer: Home equity credit line 11,698 8,270 1-4 family residential 38,600 50,254 Construction and other consumer real estate 627 748 Bankcard and other revolving plans 1,667 537 Other 85 186 Total consumer loans 52,677 59,995 Total $ 533,832 $ 349,860 Past due loans (accruing and nonaccruing) are summarized as follows: June 30, 2016 (In thousands) Current 30-89 days past due 90+ days past due Total past due Total loans Accruing loans 90+ days past due Nonaccrual loans that are current 1 Loans held for sale $ 132,942 $ — $ 13,570 $ 13,570 $ 146,512 $ — $ — Commercial: Commercial and industrial $ 13,622,079 $ 73,002 $ 62,042 $ 135,044 $ 13,757,123 $ 10,210 $ 275,451 Leasing 424,112 — 2,337 2,337 426,449 1,826 13,403 Owner occupied 6,937,243 23,486 27,918 51,404 6,988,647 4,241 39,773 Municipal 756,145 — — — 756,145 — 893 Total commercial 21,739,579 96,488 92,297 188,785 21,928,364 16,277 329,520 Commercial real estate: Construction and land development 2,062,760 23,699 1,791 25,490 2,088,250 — 2,558 Term 9,193,382 13,119 23,182 36,301 9,229,683 11,254 36,774 Total commercial real estate 11,256,142 36,818 24,973 61,791 11,317,933 11,254 39,332 Consumer: Home equity credit line 2,495,556 6,230 5,390 11,620 2,507,176 — 4,687 1-4 family residential 5,649,946 10,936 19,168 30,104 5,680,050 288 15,742 Construction and other consumer real estate 411,212 7,504 583 8,087 419,299 314 308 Bankcard and other revolving plans 456,443 2,217 1,047 3,264 459,707 861 1,332 Other 188,322 715 9 724 189,046 — 52 Total consumer loans 9,201,479 27,602 26,197 53,799 9,255,278 1,463 22,121 Total $ 42,197,200 $ 160,908 $ 143,467 $ 304,375 $ 42,501,575 $ 28,994 $ 390,973 December 31, 2015 (In thousands) Current 30-89 days past due 90+ days past due Total past due Total loans Accruing loans 90+ days past due Nonaccrual loans that are current 1 Commercial: Commercial and industrial $ 13,114,045 $ 60,523 $ 36,913 $ 97,436 $ 13,211,481 $ 3,065 $ 117,942 Leasing 440,963 183 520 703 441,666 — 3,309 Owner occupied 7,085,086 37,776 27,166 64,942 7,150,028 3,626 43,984 Municipal 668,207 7,586 46 7,632 675,839 46 951 Total commercial 21,308,301 106,068 64,645 170,713 21,479,014 6,737 166,186 Commercial real estate: Construction and land development 1,835,360 842 5,300 6,142 1,841,502 — 1,745 Term 8,469,390 10,424 34,587 45,011 8,514,401 21,697 24,867 Total commercial real estate 10,304,750 11,266 39,887 51,153 10,355,903 21,697 26,612 Consumer: Home equity credit line 2,407,972 4,717 3,668 8,385 2,416,357 — 3,053 1-4 family residential 5,340,549 14,828 26,722 41,550 5,382,099 1,036 20,939 Construction and other consumer real estate 374,987 8,593 1,660 10,253 385,240 1,337 408 Bankcard and other revolving plans 440,358 1,861 1,561 3,422 443,780 1,217 146 Other 186,436 647 66 713 187,149 — 83 Total consumer loans 8,750,302 30,646 33,677 64,323 8,814,625 3,590 24,629 Total $ 40,363,353 $ 147,980 $ 138,209 $ 286,189 $ 40,649,542 $ 32,024 $ 217,427 1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected. Credit Quality Indicators In addition to the past due and nonaccrual criteria, we also analyze loans using loan risk grading systems, which vary based on the size and type of credit risk exposure. The internal risk grades assigned to loans follow our definitions of Pass, Special Mention, Substandard, and Doubtful, which are consistent with published definitions of regulatory risk classifications. Definitions of Pass, Special Mention, Substandard, and Doubtful are summarized as follows: Pass – A Pass asset is higher quality and does not fit any of the other categories described below. The likelihood of loss is considered low. Special Mention – A Special Mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the bank’s credit position at some future date. Substandard – A Substandard asset is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified have well-defined weaknesses and are characterized by the distinct possibility that the bank may sustain some loss if deficiencies are not corrected. Doubtful – A Doubtful asset has all the weaknesses inherent in a Substandard asset with the added characteristics that the weaknesses make collection or liquidation in full highly questionable and improbable. We generally assign internal risk grades to commercial and CRE loans with commitments equal to or greater than $750,000 based on financial and statistical models, individual credit analysis, and loan officer experience and judgment. For these larger loans, we assign one of multiple grades within the Pass classification or one of the following four grades: Special Mention, Substandard, Doubtful, and Loss. Loss indicates that the outstanding balance has been charged off. We confirm our internal risk grades quarterly, or as soon as we identify information that affects the credit risk of the loan. For consumer loans and certain small commercial and CRE loans with commitments less than $750,000 , we generally assign internal risk grades similar to those described previously based on automated rules that depend on refreshed credit scores, payment performance, and other risk indicators. These are generally assigned either a Pass or Substandard grade and are reviewed as we identify information that might warrant a grade change. Outstanding loan balances (accruing and nonaccruing) categorized by these credit quality indicators are summarized as follows: June 30, 2016 (In thousands) Pass Special Mention Sub- standard Doubtful Total loans Total allowance Commercial: Commercial and industrial $ 12,393,067 $ 316,850 $ 1,047,206 $ — $ 13,757,123 Leasing 394,633 1,601 30,215 — 426,449 Owner occupied 6,549,125 149,434 290,088 — 6,988,647 Municipal 741,826 — 14,319 — 756,145 Total commercial 20,078,651 467,885 1,381,828 — 21,928,364 $ 457,064 Commercial real estate: Construction and land development 2,015,546 64,383 8,321 — 2,088,250 Term 9,020,963 51,872 156,848 — 9,229,683 Total commercial real estate 11,036,509 116,255 165,169 — 11,317,933 121,567 Consumer: Home equity credit line 2,493,134 — 14,042 — 2,507,176 1-4 family residential 5,636,600 — 43,450 — 5,680,050 Construction and other consumer real estate 417,723 — 1,576 — 419,299 Bankcard and other revolving plans 455,721 — 3,986 — 459,707 Other 188,834 — 212 — 189,046 Total consumer loans 9,192,012 — 63,266 — 9,255,278 29,714 Total $ 40,307,172 $ 584,140 $ 1,610,263 $ — $ 42,501,575 $ 608,345 December 31, 2015 (In thousands) Pass Special Mention Sub- standard Doubtful Total loans Total allowance Commercial: Commercial and industrial $ 12,007,076 $ 399,847 $ 804,403 $ 155 $ 13,211,481 Leasing 411,131 5,166 25,369 — 441,666 Owner occupied 6,720,052 139,784 290,192 — 7,150,028 Municipal 663,903 — 11,936 — 675,839 Total commercial 19,802,162 544,797 1,131,900 155 21,479,014 $ 454,277 Commercial real estate: Construction and land development 1,786,610 42,348 12,544 — 1,841,502 Term 8,319,348 47,245 139,036 8,772 8,514,401 Total commercial real estate 10,105,958 89,593 151,580 8,772 10,355,903 113,992 Consumer: Home equity credit line 2,404,635 — 11,722 — 2,416,357 1-4 family residential 5,325,519 — 56,580 — 5,382,099 Construction and other consumer real estate 381,738 — 3,502 — 385,240 Bankcard and other revolving plans 440,282 — 3,498 — 443,780 Other 186,836 — 313 — 187,149 Total consumer loans 8,739,010 — 75,615 — 8,814,625 37,779 Total $ 38,647,130 $ 634,390 $ 1,359,095 $ 8,927 $ 40,649,542 $ 606,048 Impaired Loans Loans are considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due in accordance with the contractual terms of the loan agreement, including scheduled interest payments. For our non-purchased credit-impaired loans, if a nonaccrual loan has a balance greater than $1 million , or if a loan is a troubled debt restructuring (“TDR”), including TDRs that subsequently default, or if the loan is no longer reported as a TDR, we individually evaluate the loan for impairment and estimate a specific reserve for the loan for all portfolio segments under applicable accounting guidance. Smaller nonaccrual loans are pooled for ALLL estimation purposes. Purchase credit-impaired (“PCI”) loans are included in impaired loans and are accounted for under separate accounting guidance. See subsequent discussion under Purchased Loans. When a loan is impaired, we estimate a specific reserve for the loan based on the projected present value of the loan’s future cash flows discounted at the loan’s effective interest rate, the observable market price of the loan, or the fair value of the loan’s underlying collateral. The process of estimating future cash flows also incorporates the same determining factors discussed previously under nonaccrual loans. When we base the impairment amount on the fair value of the loan’s underlying collateral, we generally charge off the portion of the balance that is impaired, such that these loans do not have a specific reserve in the ALLL. Payments received on impaired loans that are accruing are recognized in interest income, according to the contractual loan agreement. Payments received on impaired loans that are on nonaccrual are not recognized in interest income, but are applied as a reduction to the principal outstanding. The amount of interest income recognized on a cash basis during the time the loans were impaired within the three and six months ended June 30, 2016 and 2015 was not significant. Information on impaired loans individually evaluated is summarized as follows, including the average recorded investment and interest income recognized for the three and six months ended June 30, 2016 and 2015 : June 30, 2016 (In thousands) Unpaid principal balance Recorded investment Total recorded investment Related allowance with no allowance with allowance Commercial: Commercial and industrial $ 422,844 $ 81,883 $ 293,498 $ 375,381 $ 49,385 Owner occupied 117,779 66,143 41,654 107,797 4,166 Municipal 1,372 893 — 893 — Total commercial 541,995 148,919 335,152 484,071 53,551 Commercial real estate: Construction and land development 18,714 3,152 8,155 11,307 746 Term 125,446 84,530 22,277 106,807 1,545 Total commercial real estate 144,160 87,682 30,432 118,114 2,291 Consumer: Home equity credit line 27,658 20,796 4,175 24,971 206 1-4 family residential 58,960 26,423 29,691 56,114 6,393 Construction and other consumer real estate 3,400 963 1,853 2,816 103 Other 2,307 160 1,598 1,758 17 Total consumer loans 92,325 48,342 37,317 85,659 6,719 Total $ 778,480 $ 284,943 $ 402,901 $ 687,844 $ 62,561 December 31, 2015 (In thousands) Unpaid principal balance Recorded investment Total recorded investment Related allowance with no allowance with allowance Commercial: Commercial and industrial $ 272,161 $ 44,190 $ 163,729 $ 207,919 $ 30,538 Owner occupied 141,526 83,024 43,243 126,267 5,486 Municipal 1,430 951 — 951 — Total commercial 415,117 128,165 206,972 335,137 36,024 Commercial real estate: Construction and land development 22,791 5,076 9,558 14,634 618 Term 142,239 82,864 34,361 117,225 2,604 Total commercial real estate 165,030 87,940 43,919 131,859 3,222 Consumer: Home equity credit line 27,064 18,980 5,319 24,299 243 1-4 family residential 74,009 29,540 41,155 70,695 8,736 Construction and other consumer real estate 2,741 989 1,014 2,003 173 Other 3,187 36 2,570 2,606 299 Total consumer loans 107,001 49,545 50,058 99,603 9,451 Total $ 687,148 $ 265,650 $ 300,949 $ 566,599 $ 48,697 Three Months Ended Six Months Ended (In thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial: Commercial and industrial $ 429,681 $ 1,176 $ 317,211 $ 2,505 Owner occupied 111,165 3,131 113,198 5,557 Municipal 901 — 916 — Total commercial 541,747 4,307 431,325 8,062 Commercial real estate: Construction and land development 11,658 695 11,922 1,202 Term 98,234 3,512 96,925 6,871 Total commercial real estate 109,892 4,207 108,847 8,073 Consumer: Home equity credit line 24,609 367 24,227 744 1-4 family residential 61,481 455 60,372 901 Construction and other consumer real estate 2,829 48 2,814 95 Bankcard and other revolving plans — 1 — 17 Other 2,086 92 2,294 200 Total consumer loans 91,005 963 89,707 1,957 Total $ 742,644 $ 9,477 $ 629,879 $ 18,092 Three Months Ended Six Months Ended (In thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial: Commercial and industrial $ 174,911 $ 2,831 $ 155,584 $ 4,255 Owner occupied 144,613 3,186 142,817 6,970 Municipal 1,008 — 1,021 — Total commercial 320,532 6,017 299,422 11,225 Commercial real estate: Construction and land development 35,562 1,628 36,215 2,177 Term 144,054 5,063 142,439 10,038 Total commercial real estate 179,616 6,691 178,654 12,215 Consumer: Home equity credit line 25,400 416 24,948 821 1-4 family residential 69,874 534 68,464 1,041 Construction and other consumer real estate 2,497 22 2,529 64 Bankcard and other revolving plans — 1 1 100 Other 4,176 230 4,463 516 Total consumer loans 101,947 1,203 100,405 2,542 Total $ 602,095 $ 13,911 $ 578,481 $ 25,982 Modified and Restructured Loans Loans may be modified in the normal course of business for competitive reasons or to strengthen the Company’s position. Loan modifications and restructurings may also occur when the borrower experiences financial difficulty and needs temporary or permanent relief from the original contractual terms of the loan. These modifications are structured on a loan-by-loan basis and, depending on the circumstances, may include extended payment terms, a modified interest rate, forgiveness of principal, or other concessions. Loans that have been modified to accommodate a borrower who is experiencing financial difficulties, and for which the Company has granted a concession that it would not otherwise consider, are considered TDRs. We consider many factors in determining whether to agree to a loan modification involving concessions, and seek a solution that will both minimize potential loss to the Company and attempt to help the borrower. We evaluate borrowers’ current and forecasted future cash flows, their ability and willingness to make current contractual or proposed modified payments, the value of the underlying collateral (if applicable), the possibility of obtaining additional security or guarantees, and the potential costs related to a repossession or foreclosure and the subsequent sale of the collateral. TDRs are classified as either accrual or nonaccrual loans. A loan on nonaccrual and restructured as a TDR will remain on nonaccrual status until the borrower has proven the ability to perform under the modified structure for a minimum of six months, and there is evidence that such payments can and are likely to continue as agreed. Performance prior to the restructuring, or significant events that coincide with the restructuring, are included in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual at the time of restructuring or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains classified as a nonaccrual loan. A TDR loan that specifies an interest rate that at the time of the restructuring is greater than or equal to the rate the bank is willing to accept for a new loan with comparable risk may not be reported as a TDR or an impaired loan in the calendar years subsequent to the restructuring if it is in compliance with its modified terms. Selected information on TDRs that includes the recorded investment on an accruing and nonaccruing basis by loan

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	6 Months Ended
	Jun. 30, 2016
Summary of Derivative Instruments [Abstract]
Derivative Instruments And Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Objectives Our objectives in using derivatives are to add stability to interest income or expense, to modify the duration of specific assets or liabilities as we consider advisable, to manage exposure to interest rate movements or other identified risks, and/or to directly offset derivatives sold to our customers. We apply hedge accounting to certain derivatives executed for risk management purposes as described in more detail subsequently. However, we do not apply hedge accounting to all of the derivatives involved in our risk management activities. Derivatives not designated as accounting hedges are not speculative and are used to economically manage our exposure to interest rate movements and other identified risks, but do not meet the strict hedge accounting requirements. Accounting We record all derivatives on the balance sheet at fair value. Note 10 discusses the process to estimate fair value for derivatives. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting accounting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected cash flows, or other types of forecasted transactions, are considered cash flow hedges. For derivatives designated as fair value hedges, changes in the fair value of the derivative are recognized in earnings together with changes in the fair value of the related hedged item. The net amount, if any, representing hedge ineffectiveness, is reflected in earnings. In previous years, we used fair value hedges to manage interest rate exposure to certain long-term debt. These hedges have been terminated and their remaining balances were completely amortized into earnings during 2015. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative are recorded in OCI and recognized in earnings when the hedged transaction affects earnings. The ineffective portion of changes in the fair value of cash flow hedges is recognized directly in earnings. We use interest rate swaps as part of our cash flow hedging strategy to hedge the variable cash flows associated with designated commercial loans. These interest rate swap agreements designated as cash flow hedges involve the receipt of fixed-rate amounts in exchange for variable-rate payments over the life of the agreements without exchange of the underlying notional amount. No derivatives have been designated as hedges of net investments in foreign operations. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows on the derivative hedging instrument with the changes in fair value or cash flows on the designated hedged item or transaction. For derivatives not designated as accounting hedges, changes in fair value are recognized in earnings. The remaining balances of any derivative instruments terminated prior to maturity, including amounts in accumulated other comprehensive income (“AOCI”) for swap hedges, are accreted or amortized to interest income or expense over the period to their previously stated maturity dates. Amounts in AOCI are reclassified to interest income as interest is earned on related variable-rate loans and as amounts for terminated hedges are accreted or amortized to earnings. For the 12 months following June 30, 2016 , we estimate that an additional $8.7 million will be reclassified. Collateral and Credit Risk Exposure to credit risk arises from the possibility of nonperformance by counterparties. Financial institutions which are well capitalized and well established are the counterparties for those derivatives entered into for asset liability management and to offset derivatives sold to our customers. The Company reduces its counterparty exposure for derivative contracts by centrally clearing all eligible derivatives. For those derivatives that are not centrally cleared, the counterparties are typically financial institutions or customers of the Company. For those that are financial institutions, we manage our credit exposure through the use of a Credit Support Annex (“CSA”) to International Swaps and Derivative Association (“ISDA”) master agreements. Eligible collateral types are documented by the CSA and controlled under the Company’s general credit policies. Collateral balances are typically monitored on a daily basis. A valuation haircut policy reflects the fact that collateral may fall in value between the date the collateral is called and the date of liquidation or enforcement. In practice, all of the Company’s collateral held as credit risk mitigation under a CSA is cash. We offer interest rate swaps to our customers to assist them in managing their exposure to changing interest rates. Upon issuance, all of these customer swaps are immediately offset through matching derivative contracts, such that the Company minimizes its interest rate risk exposure resulting from such transactions. Most of these customers do not have the capability for centralized clearing. Therefore, we manage the credit risk through loan underwriting, which includes a credit risk exposure formula for the swap, the same collateral and guarantee protection applicable to the loan and credit approvals, limits, and monitoring procedures. Fee income from customer swaps is included in other service charges, commissions and fees. No significant losses on derivative instruments have occurred as a result of counterparty nonperformance. Nevertheless, the related credit risk is considered and measured when and where appropriate. See Note 6 for further discussion of our underwriting, collateral requirements, and other procedures used to address credit risk. Our derivative contracts require us to pledge collateral for derivatives that are in a net liability position at a given balance sheet date. Certain of these derivative contracts contain credit-risk-related contingent features that include the requirement to maintain a minimum debt credit rating. We may be required to pledge additional collateral if a credit-risk-related feature were triggered, such as a downgrade of our credit rating. However, in past situations, not all counterparties have demanded that additional collateral be pledged when provided for under their contracts. At June 30, 2016 , the fair value of our derivative liabilities was $127.8 million , for which we were required to pledge cash collateral of approximately $110.7 million in the normal course of business. If our credit rating were downgraded one notch by either Standard & Poor’s or Moody’s at June 30, 2016 , the additional amount of collateral we could be required to pledge is approximately $2.9 million . As a result of the Dodd-Frank Act, all newly eligible derivatives entered into are cleared through a central clearinghouse. Derivatives that are centrally cleared do not have credit-risk-related features that require additional collateral if our credit rating were downgraded. Derivative Amounts Selected information with respect to notional amounts and recorded gross fair values at June 30, 2016 and December 31, 2015 , and the related gain (loss) of derivative instruments for the six months ended June 30, 2016 and 2015 is summarized as follows: June 30, 2016 December 31, 2015 Notional amount Fair value Notional amount Fair value (In thousands) Other assets Other liabilities Other assets Other liabilities Derivatives designated as hedging instruments Cash flow hedges: Interest rate swaps $ 1,387,500 $ 27,073 $ — $ 1,387,500 $ 5,461 $ 956 Total derivatives designated as hedging instruments 1,387,500 27,073 — 1,387,500 5,461 956 Derivatives not designated as hedging instruments Interest rate swaps and forwards 219,708 2,678 406 40,314 — 8 Interest rate swaps for customers 1 3,755,129 104,996 111,994 3,256,190 51,353 53,843 Foreign exchange 503,426 17,719 15,357 463,064 20,824 17,761 Total derivatives not designated as hedging instruments 4,478,263 125,393 127,757 3,759,568 72,177 71,612 Total derivatives $ 5,865,763 $ 152,466 $ 127,757 $ 5,147,068 $ 77,638 $ 72,568 1 Notional amounts include both the customer swaps and the offsetting derivative contracts. Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Amount of derivative gain (loss) recognized/reclassified (In thousands) OCI Reclassified from AOCI to interest income 2 Noninterest income (expense) Offset to interest expense OCI Reclassified from AOCI to interest income 3 Noninterest income (expense) Offset to interest expense Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ 7,794 $ 2,938 $ 28,490 $ 5,935 7,794 2,938 28,490 5,935 Fair value hedges: Terminated swaps on long-term debt $ — $ — Total derivatives designated as hedging instruments 7,794 2,938 — 28,490 5,935 — Derivatives not designated as hedging instruments Interest rate swaps and forward contracts $ 1,921 $ 2,156 Interest rate swaps for customers 1,237 728 Foreign exchange 2,432 4,668 Total derivatives not designated as hedging instruments 5,590 7,552 Total derivatives $ 7,794 $ 2,938 $ 5,590 $ — $ 28,490 $ 5,935 $ 7,552 $ — Three Months Ended June 30, 2015 Six Months Ended June 30, 2015 Amount of derivative gain (loss) recognized/reclassified (In thousands) OCI Reclassified from AOCI to interest income 2 Noninterest income (expense) Offset to interest expense OCI Reclassified from AOCI to interest income 3 Noninterest income (expense) Offset to interest expense Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ (424 ) $ 1,218 $ 3,829 $ 2,234 (424 ) 1,218 3,829 2,234 Fair value hedges: Terminated swaps on long-term debt $ 465 $ 933 Total derivatives designated as hedging instruments (424 ) 1,218 465 3,829 2,234 933 Derivatives not designated as hedging instruments Interest rate swaps for customers $ 3,873 $ 4,390 Futures contracts — 1 Foreign exchange 1,697 4,432 Total derivatives not designated as hedging instruments 5,570 8,823 Total derivatives $ (424 ) $ 1,218 $ 5,570 $ 465 $ 3,829 $ 2,234 $ 8,823 $ 933 Note: These schedules are not intended to present at any given time the Company’s long/short position with respect to its derivative contracts. 1 Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the change in fair value of the derivative. 2 Amounts for the three and six months ended June 30 , of $2.9 million and $5.9 million in 2016 , and $1.2 million and $2.2 million in 2015 , respectively, are the amounts of reclassification to earnings from AOCI presented in Note 8. The fair value of derivative assets was reduced by a net credit valuation adjustment of $7.0 million and $1.7 million at June 30 , 2016 and 2015 , respectively. The adjustment for derivative liabilities was not significant at June 30 , 2016 and 2015 . These adjustments are required to reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk.

Debt And Shareholders' Equity

Debt And Shareholders' Equity	6 Months Ended
	Jun. 30, 2016
Capitalization, Long-term Debt and Equity [Abstract]
Debt And Shareholders' Equity	DEBT AND SHAREHOLDERS’ EQUITY Long-term debt is summarized as follows: (In thousands) June 30, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,357 246,170 Senior notes 286,578 400,334 Capital lease obligations 827 912 Total $ 698,712 $ 812,366 The preceding carrying values represent the par value of the debt adjusted for any unamortized premium or discount or unamortized debt issuance costs. The amount of long-term debt as of December 31, 2015 presented in the schedule differs from the amount in our 2015 10-K as a result of the reclassification of unamortized debt issuance costs to long-term debt in compliance with ASU 2015-03. Debt Redemptions and Maturities During the first six months of 2016, $89 million of our 4.0% senior notes matured. In addition, we purchased $15 million of our 4.5% senior notes and redeemed $11 million of our 3.6% senior medium-term notes. We have elected to exercise our right to redeem the junior subordinated debentures related to trust preferred securities issued to the following trusts, or intend to make such election when notice provisions allow. Redemptions will occur at the next payment date. (In thousands) Balance Coupon rate 1 Next payment date Amegy Statutory Trust I $ 51,547 3mL+2.85% September 17, 2016 Amegy Statutory Trust II 36,083 3mL+1.90% October 7, 2016 Amegy Statutory Trust III 61,856 3mL+1.78% September 15, 2016 Stockmen’s Statutory Trust II 7,732 3mL+3.15% September 26, 2016 Stockmen’s Statutory Trust III 7,732 3mL+2.89% September 17, 2016 Total $ 164,950 1 Designation of “3mL” is three-month London Interbank Offered Rate (“LIBOR”). Shareholders’ Equity On April 25, 2016, we launched a tender offer to purchase up to $120 million par amount of certain outstanding preferred stock. Our preferred stock decreased by $119 million in the second quarter of 2016 as a result of the tender offer, including the purchase of $27 million of its Series I preferred stock, $59 million of its Series J preferred stock, and $33 million of its Series G preferred stock for an aggregate cash payment of 126 million . The total one-time reduction to net earnings applicable to common shareholders associated with the preferred stock redemption was $9.8 million . Accumulated other comprehensive income (loss) increased to $24 million at June 30, 2016 from $(12) million at March 31, 2016 and $(55) million at December 31, 2015, primarily as a result of improvement in the fair value of the Company’s AFS securities portfolio due largely to changes in the interest rate environment. Basel III Capital Framework Effective January 1, 2015, we adopted the new Basel III capital framework that was issued by the Federal Reserve for U.S. banking organizations. We adopted the new capital rules on a phase-in basis and will adopt the fully phased-in requirements effective January 1, 2019. Accumulated Other Comprehensive Income Changes in AOCI by component are as follows: (In thousands) Net unrealized gains (losses) on investment securities Net unrealized gains (losses) on derivatives and other Pension and post-retirement Total Six Months Ended June 30, 2016 Balance at December 31, 2015 $ (18,369 ) $ 1,546 $ (37,789 ) $ (54,612 ) Other comprehensive income (loss) before reclassifications, net of tax 65,027 17,615 (665 ) 81,977 Amounts reclassified from AOCI, net of tax (33 ) (3,680 ) — (3,713 ) Other comprehensive income (loss) 64,994 13,935 (665 ) 78,264 Balance at June 30, 2016 $ 46,625 $ 15,481 $ (38,454 ) $ 23,652 Income tax expense included in other comprehensive income $ 40,322 $ 8,407 $ 665 $ 49,394 Six Months Ended June 30, 2015 Balance at December 31, 2014 $ (91,921 ) $ 2,226 $ (38,346 ) $ (128,041 ) Other comprehensive income before reclassifications, net of tax 4,131 4,308 — 8,439 Amounts reclassified from AOCI, net of tax 85,812 (1,382 ) — 84,430 Other comprehensive income 89,943 2,926 — 92,869 Balance at June 30, 2015 $ (1,978 ) $ 5,152 $ (38,346 ) $ (35,172 ) Income tax expense included in other comprehensive income $ 58,778 $ 1,867 $ — $ 60,645 Amounts reclassified from AOCI 1 Statement of income (SI) Balance sheet (BS) (In thousands) Three Months Ended Six Months Ended Details about AOCI components 2016 2015 2016 2015 Affected line item Net realized gains (losses) on investment securities $ 25 $ (138,436 ) $ 53 $ (138,675 ) SI Fixed income securities gains (losses), net Income tax expense (benefit) 9 (52,772 ) 20 (52,863 ) Amounts reclassified from AOCI $ 16 $ (85,664 ) $ 33 $ (85,812 ) Net unrealized gains on derivative instruments $ 2,938 $ 1,218 $ 5,935 $ 2,234 SI Interest and fees on loans Income tax expense 1,116 465 2,255 852 Amounts Reclassified from AOCI $ 1,822 $ 753 $ 3,680 $ 1,382 1 Negative reclassification amounts indicate decreases to earnings in the statement of income and increases to balance sheet assets. The opposite applies to positive reclassification amounts.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The effective income tax rate of 34.6% for the second quarter of 2016 was higher than the 2015 second quarter rate of 28.3% . The tax rates for both the second quarter of 2016 and 2015 were benefited primarily by the non-taxability of certain income items. The tax rate for the second quarter of 2016 was higher compared to the same period in 2015 due to a decrease in the proportion of nontaxable items relative to pretax income for that period. On a year-to-date basis, the 2016 tax rate of 33.2% was lower than the 2015 tax rate of 34.8% . The year-to-date tax rates for 2016 and 2015 were similarly impacted by the above-discussed permanent items. However, the 2016 effective tax rate was further benefited by the release of various state uncertain tax positions. Net deferred tax assets were approximately $164 million at June 30, 2016 and $203 million at December 31, 2015 . We evaluate deferred tax assets on a regular basis to determine whether an additional valuation allowance is required. Based on this evaluation, and considering the weight of the positive evidence compared to the negative evidence, we have concluded that an additional valuation allowance is not required as of June 30, 2016 .

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Fair Value Measurement Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. To measure fair value, a hierarchy has been established that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows: Level 1 – Quoted prices in active markets for identical assets or liabilities in active markets that the Company has the ability to access; Level 2 – Observable inputs other than Level 1 including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in less active markets, observable inputs other than quoted prices that are used in the valuation of an asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means; and Level 3 – Unobservable inputs supported by little or no market activity for financial instruments whose value is determined by pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. The level in the fair value hierarchy within which the fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measure in its entirety. Market activity is presumed to be orderly in the absence of evidence of forced or disorderly sales, although such sales may still be indicative of fair value. Applicable accounting guidance precludes the use of blockage factors or liquidity adjustments due to the quantity of securities held by an entity. We use fair value to measure certain assets and liabilities on a recurring basis when fair value is the primary measure for accounting. Fair value is used on a nonrecurring basis to measure certain assets when adjusting carrying values, such as the application of lower of cost or fair value accounting, including recognition of impairment on assets. Fair value is also used when providing required disclosures for certain financial instruments. Fair Value Policies and Procedures We have various policies, processes and controls in place to ensure that fair values are reasonably developed, reviewed and approved for use. These include a Securities Valuation Committee (“SVC”) comprised of executive management appointed by the Board of Directors. The SVC reviews and approves on a quarterly basis the key components of fair value estimation, including critical valuation assumptions for Level 3 modeling. A Model Risk Management Group conducts model validations, including internal models, and sets policies and procedures for revalidation, including the timing of revalidation. Third Party Service Providers We use a third party pricing service to fair value measurements for approximately 89% of our AFS Level 2 securities. Fair value measurements for other AFS Level 2 generally use certain inputs corroborated by market data and include standard form discounted cash flow modeling. For Level 2 securities, the third party pricing service provides documentation on an ongoing basis that presents market corroborative data, including detail pricing information and market reference data. The documentation includes benchmark yields, reported trades, broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data, including information from the vendor trading platform. We review, test and validate this information as appropriate. Absent observable trade data, we do not adjust prices from our third party sources. The following describes the hierarchy designations, valuation methodologies, and key inputs to measure fair value on a recurring basis for designated financial instruments: Available-for-Sale U.S. Treasury, Agencies and Corporations U.S. Treasury securities are measured under Level 1 using quoted market prices when available. U.S. agencies and corporations are measured under Level 2 generally using the previously discussed third party pricing service. Municipal Securities Municipal securities are measured under Level 2 generally using the third party pricing service or an internal model. Valuation inputs include Baa municipal curves, as well as FHLB and LIBOR swap curves. Our valuation methodology for non-rated municipal securities changed at year-end to utilize more observable inputs, primarily municipal market yield curves, compared to our previous valuation method. The resulting values were determined to be Level 2. Money Market Mutual Funds and Other Money market mutual funds and other securities are measured under Level 1 or Level 2. For Level 1, quoted market prices are used which may include NAVs or their equivalents. Level 2 valuations generally use quoted prices for similar securities. Trading Account Securities in the trading account are generally measured under Level 2 using third party pricing service providers as described previously. Bank-Owned Life Insurance Bank-owned life insurance (“BOLI”) is measured under Level 2 according to cash surrender values (“CSVs”) of the insurance policies that are provided by a third party service. Nearly all policies are general account policies with CSVs based on the Company’s claims on the assets of the insurance companies. The insurance companies’ investments include predominantly fixed income securities consisting of investment-grade corporate bonds and various types of mortgage instruments. Management regularly reviews its BOLI investment performance, including concentrations among insurance providers. Private Equity Investments Private equity investments are measured under Level 3. The Equity Investments Committee, consisting of executives familiar with the investments, reviews periodic financial information, including audited financial statements when available. Certain analytics may be employed that include current and projected financial performance, recent financing activities, economic and market conditions, market comparables, market liquidity, sales restrictions, and other factors. The amount of unfunded commitments to invest is disclosed in Note 11. Certain restrictions apply for the redemption of these investments and certain investments are prohibited by the Volcker Rule. See discussions in Notes 5 and 11. Agriculture Loan Servicing This asset results from our servicing of agriculture loans approved and funded by Federal Agricultural Mortgage Corporation (“FAMC”). We provide this servicing under an agreement with FAMC for loans they own. The asset’s fair value represents our projection of the present value of future cash flows measured under Level 3 using discounted cash flow methodologies. Interest-Only Strips Interest-only strips are created as a by-product of the securitization process. When the guaranteed portions of SBA 7(a) loans are pooled, interest-only strips may be created in the pooling process. The asset’s fair value represents our projection of the present value of future cash flows measured under Level 3 using discounted cash flow methodologies. Deferred Compensation Plan Assets and Obligations Invested assets in the deferred compensation plan consist of shares of registered investment companies. These mutual funds are valued under Level 1 at quoted market prices, which represents the NAV of shares held by the plan at the end of the period. Derivatives Derivatives are measured according to their classification as either exchange-traded or over-the-counter (“OTC”). Exchange-traded derivatives consist of foreign currency exchange contracts measured under Level 1 because they are traded in active markets. OTC derivatives, including those for customers, consist of interest rate swaps and options. These derivatives are measured under Level 2 using third party services. Observable market inputs include yield curves (the LIBOR swap curve and relevant overnight index swap curves), foreign exchange rates, commodity prices, option volatilities, counterparty credit risk, and other related data. Credit valuation adjustments are required to reflect nonperformance risk for both the Company and the respective counterparty. These adjustments are determined generally by applying a credit spread to the total expected exposure of the derivative. Securities Sold, Not Yet Purchased Securities sold, not yet purchased, included in “Federal funds and other short-term borrowings” on the balance sheet, are measured under Level 1 using quoted market prices. If not available, quoted prices under Level 2 for similar securities are used. Quantitative Disclosure of Fair Value Measurements Assets and liabilities measured at fair value by class on a recurring basis are summarized as follows: (In thousands) June 30, 2016 Level 1 Level 2 Level 3 Total ASSETS Investment securities: Available-for-sale: U.S. Treasury, agencies and corporations $ — $ 8,695,993 $ — $ 8,695,993 Municipal securities 673,267 673,267 Other debt securities 21,556 21,556 Money market mutual funds and other 85,545 728 86,273 85,545 9,391,544 — 9,477,089 Trading account 118,775 118,775 Other noninterest-bearing investments: Bank-owned life insurance 491,725 491,725 Private equity investments 122,257 122,257 Other assets: Agriculture loan servicing and interest-only strips 18,228 18,228 Deferred compensation plan assets 83,706 83,706 Derivatives: Interest rate swaps and forwards 29,751 29,751 Interest rate swaps for customers 104,996 104,996 Foreign currency exchange contracts 17,719 17,719 17,719 134,747 — 152,466 $ 186,970 $ 10,136,791 $ 140,485 $ 10,464,246 LIABILITIES Securities sold, not yet purchased $ 1,609 $ — $ — $ 1,609 Other liabilities: Deferred compensation plan obligations 83,706 83,706 Derivatives: Interest rate swaps and forwards 406 406 Interest rate swaps for customers 111,994 111,994 Foreign currency exchange contracts 15,357 15,357 15,357 112,400 — 127,757 $ 100,672 $ 112,400 $ — $ 213,072 (In thousands) December 31, 2015 Level 1 Level 2 Level 3 Total ASSETS Investment securities: Available-for-sale: U.S. Treasury, agencies and corporations $ — $ 7,100,844 $ — $ 7,100,844 Municipal securities 418,695 418,695 Other debt securities 22,941 22,941 Money market mutual funds and other 61,807 38,829 100,636 61,807 7,581,309 — 7,643,116 Trading account 48,168 48,168 Other noninterest-bearing investments: Bank-owned life insurance 485,978 485,978 Private equity investments 120,027 120,027 Other assets: Agriculture loan servicing and interest-only strips 13,514 13,514 Deferred compensation plan assets 84,570 84,570 Derivatives: Interest rate swaps and forwards 5,966 5,966 Interest rate swaps for customers 51,353 51,353 Foreign currency exchange contracts 20,824 20,824 20,824 57,319 — 78,143 $ 167,201 $ 8,172,774 $ 133,541 $ 8,473,516 LIABILITIES Securities sold, not yet purchased $ 30,158 $ — $ — $ 30,158 Other liabilities: Deferred compensation plan obligations 84,570 84,570 Derivatives: Interest rate swaps and forwards 835 835 Interest rate swaps for customers 53,843 53,843 Foreign currency exchange contracts 17,761 17,761 17,761 54,678 — 72,439 $ 132,489 $ 54,678 $ — $ 187,167 Reconciliation of Level 3 Fair Value Measurements The following reconciles the beginning and ending balances of assets and liabilities that are measured at fair value by class on a recurring basis using Level 3 inputs: Level 3 Instruments Three Months Ended June 30, 2016 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at March 31, 2016 $ — $ — $ — $ 119,222 $ 17,067 $ — Net gains (losses) included in: Statement of income: Dividends and other investment income 130 Equity securities gains, net 2,555 Other noninterest income 1,531 Purchases 4,515 Sales (3,378 ) Redemptions and paydowns (787 ) (370 ) Balance at June 30, 2016 $ — $ — $ — $ 122,257 $ 18,228 $ — Level 3 Instruments Six Months Ended June 30, 2016 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at December 31, 2015 $ — $ — $ — $ 120,027 $ 13,514 $ — Net gains (losses) included in: Statement of income: Dividends and other investment losses (1,354 ) Equity securities gains, net 546 Other noninterest income 4,991 Purchases 7,316 368 Sales (3,414 ) Redemptions and paydowns (864 ) (645 ) Balance at June 30, 2016 $ — $ — $ — $ 122,257 $ 18,228 $ — Level 3 Instruments Three Months Ended June 30, 2015 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at March 31, 2015 $ 2,465 $ 438,338 $ 4,803 $ 105,232 $ 12,001 $ — Net gains (losses) included in: Statement of income: Accretion of purchase discount on securities available-for-sale 1 214 Dividends and other investment losses (1,633 ) Equity securities gains, net 714 Fixed income securities losses, net (375 ) (136,368 ) (606 ) Other noninterest income 1,483 Other comprehensive income (loss) 560 148,496 (116 ) Purchases 7,262 210 Sales (2,651 ) (437,442 ) (4,081 ) (991 ) Redemptions and paydowns (13,238 ) (469 ) (192 ) Balance at June 30, 2015 $ — $ — $ — $ 110,115 $ 13,502 $ — Level 3 Instruments Six Months Ended June 30, 2015 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at December 31, 2014 $ 4,164 $ 393,007 $ 4,761 $ 97,649 $ 12,227 $ (13 ) Net gains (losses) included in: Statement of income: Accretion of purchase discount on securities available-for-sale 3 471 Dividends and other investment losses (559 ) Equity securities gains, net 3,967 Fixed income securities losses, net (344 ) (136,691 ) (606 ) Other noninterest income 1,487 Other noninterest expense 13 Other comprehensive income (loss) 687 141,547 (74 ) Fair value of HTM securities reclassified as AFS 57,308 Purchases 12,314 381 Sales (2,651 ) (440,055 ) (4,081 ) (2,508 ) Redemptions and paydowns (1,859 ) (15,587 ) (748 ) (593 ) Balance at June 30, 2015 $ — $ — $ — $ 110,115 $ 13,502 $ — No transfers of assets or liabilities occurred among Levels 1, 2 or 3 for the three and six months ended June 30, 2016 and 2015 . The preceding reconciling amounts using Level 3 inputs include the following realized amounts in the statement of income: (In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 Dividends and other investment income $ — $ 4 $ — $ 4 Fixed income securities losses, net — (137,349 ) — (137,641 ) Equity securities gains (losses), net 93 (674 ) 93 (674 ) Nonrecurring Fair Value Measurements Included in the balance sheet amounts are the following amounts of assets that had fair value changes during the year-to-date period measured on a nonrecurring basis. (In thousands) Fair value at June 30, 2016 Fair value at December 31, 2015 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total ASSETS Private equity investments, carried at cost $ — $ — $ 1,477 $ 1,477 $ — $ — $ 10,707 $ 10,707 Impaired loans — 51,033 — 51,033 — 10,991 — 10,991 Other real estate owned — 3,660 — 3,660 — 2,388 — 2,388 $ — $ 54,693 $ 1,477 $ 56,170 $ — $ 13,379 $ 10,707 $ 24,086 The previous fair values may not be current as of the dates indicated, but rather as of the date the fair value change occurred, such as a charge for impairment. Accordingly, carrying values may not equal current fair value. Gains (losses) from fair value changes (In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 ASSETS Private equity investments, carried at cost $ — $ (1,125 ) $ (342 ) $ (2,278 ) Impaired loans (14,796 ) (2,808 ) (29,487 ) (5,357 ) Other real estate owned (563 ) (310 ) (600 ) (1,318 ) $ (15,359 ) $ (4,243 ) $ (30,429 ) $ (8,953 ) During the three and six months ended June 30, we recognized net gains of $1.0 million and $2.9 million in 2016 and $1.1 million and $1.9 million in 2015 from the sale of other real estate owned (“OREO”) properties that had a carrying value at the time of sale of approximately $4.7 million and $10.1 million during the six months ended June 30, 2016 and 2015 , respectively. Previous to their sale in these periods, we recognized impairment on these properties of an insignificant amount in 2016 and 2015 . Private equity investments carried at cost were measured at fair value for impairment purposes according to the methodology previously discussed for these investments. Amounts of PEIs carried at cost were $17.9 million at June 30, 2016 and $25.3 million at December 31, 2015 . Amounts of other noninterest-bearing investments carried at cost were $191.2 million at June 30, 2016 and $191.5 million at December 31, 2015 , which were comprised of Federal Reserve and FHLB stock. Impaired (or nonperforming) loans that are collateral-dependent were measured at fair value based on the fair value of the collateral. OREO was measured initially at fair value based on property appraisals at the time of transfer and subsequently at the lower of cost or fair value. Measurement of fair value for collateral-dependent loans and OREO was based on third party appraisals that utilize one or more valuation techniques (income, market and/or cost approaches). Any adjustments to calculated fair value were made based on recently completed and validated third party appraisals, third party appraisal services, automated valuation services, or our informed judgment. Evaluations were made to determine that the appraisal process met the relevant concepts and requirements of applicable accounting guidance. Automated valuation services may be used primarily for residential properties when values from any of the previous methods were not available within 90 days of the balance sheet date. These services use models based on market, economic, and demographic values. The use of these models has only occurred in a very few instances and the related property valuations have not been sufficiently significant to consider disclosure under Level 3 rather than Level 2. Impaired loans that are not collateral-dependent were measured based on the present value of future cash flows discounted at the expected coupon rates over the lives of the loans. Because the loans were not discounted at market interest rates, the valuations do not represent fair value and have been excluded from the nonrecurring fair value balance in the preceding schedules. Fair Value of Certain Financial Instruments Following is a summary of the carrying values and estimated fair values of certain financial instruments: June 30, 2016 December 31, 2015 (In thousands) Carrying value Estimated fair value Level Carrying value Estimated fair value Level Financial assets: HTM investment securities $ 713,392 $ 720,991 2 $ 545,648 $ 552,088 2 Loans and leases (including loans held for sale), net of allowance 42,039,742 42,184,148 3 40,193,374 39,535,365 3 Financial liabilities: Time deposits 2,336,088 2,343,427 2 2,130,680 2,129,742 2 Foreign deposits 117,708 117,690 2 294,391 294,321 2 Long-term debt 698,712 738,760 2 812,366 838,796 2 This summary excludes financial assets and liabilities for which carrying value approximates fair value and financial instruments that are recorded at fair value on a recurring basis. Financial instruments for which carrying values approximate fair value include cash and due from banks, money market investments, demand, savings and money market deposits, federal funds purchased and security repurchase agreements. The estimated fair value of demand, savings and money market deposits is the amount payable on demand at the reporting date. Carrying value is used because the accounts have no stated maturity and the customer has the ability to withdraw funds immediately. HTM investment securities primarily consist of municipal securities. They were measured at fair value according to the methodology previously discussed. Loans are measured at fair value according to their status as nonimpaired or impaired. For nonimpaired loans, fair value is estimated by discounting future cash flows using the LIBOR yield curve adjusted by a factor which reflects the credit and interest rate risk inherent in the loan. These future cash flows are then reduced by the estimated “life-of-the-loan” aggregate credit losses in the loan portfolio. These adjustments for lifetime future credit losses are derived from the methods used to estimate the ALLL for our loan portfolio and are adjusted quarterly as necessary to reflect the most recent loss experience. Impaired loans that are collateral-dependent are already considered to be held at fair value. Impaired loans that are not collateral-dependent have future cash flows reduced by the estimated “life-of-the-loan” credit loss derived from methods used to estimate the ALLL for these loans. See Impaired Loans in Note 6 for details on the impairment measurement method for impaired loans. Loans, other than those held for sale, are not normally purchased and sold by the Company, and there are no active trading markets for most of this portfolio. Time and foreign deposits, and any other short-term borrowings, are measured at fair value by discounting future cash flows using the LIBOR yield curve to the given maturity dates. Long-term debt is measured at fair value based on actual market trades (i.e., an asset value) when available, or discounting cash flows to maturity using the LIBOR yield curve adjusted for credit spreads. These fair value disclosures represent our best estimates based on relevant market information and information about the financial instruments. Fair value estimates are based on judgments regarding current economic conditions, future expected loss experience, risk characteristics of the various instruments, and other factors. These estimates are subjective in nature, involve uncertainties and matters of significant judgment, and cannot be determined with precision. Changes in these methodologies and assumptions could significantly affect the estimates.

Commitments, Guarantees, And Co

Commitments, Guarantees, And Contingent Liabilities	6 Months Ended
	Jun. 30, 2016
Guarantees, Commitments And Contingencies [Abstract]
Guarantees, Commitments And Contingencies	COMMITMENTS, GUARANTEES AND CONTINGENT LIABILITIES Commitments and Guarantees Contractual amounts of off-balance sheet financial instruments used to meet the financing needs of our customers are as follows: (In thousands) June 30, December 31, Net unfunded commitments to extend credit 1 $ 17,524,020 $ 17,169,785 Standby letters of credit: Financial 771,167 661,554 Performance 204,922 216,843 Commercial letters of credit 46,254 18,447 Total unfunded lending commitments $ 18,546,363 $ 18,066,629 1 Net of participations The Company’s 2015 Annual Report on Form 10-K contains further information about these commitments and guarantees including their terms and collateral requirements. At June 30, 2016 , the Company had recorded approximately $4.7 million as a liability for the guarantees associated with the standby letters of credit, which consisted of $1.9 million attributable to the RULC and $2.8 million of deferred commitment fees. At June 30, 2016 , the Parent has guaranteed $165 million of debt of affiliated trusts issuing trust preferred securities. At June 30, 2016 , we had unfunded commitments for PEIs of approximately $20 million . These obligations have no stated maturity. Certain PEIs related to these commitments are prohibited by the Volcker Rule. See related discussions about these investments in Notes 5 and 10. Legal Matters We are subject to litigation in court and arbitral proceedings, as well as proceedings, investigations, examinations and other actions brought or considered by governmental and self-regulatory agencies. Litigation may relate to lending, deposit and other customer relationships, vendor and contractual issues, employee matters, intellectual property matters, personal injuries and torts, regulatory and legal compliance, and other matters. While most matters relate to individual claims, we are also subject to putative class action claims and similar broader claims. Proceedings, investigations, examinations and other actions brought or considered by governmental and self-regulatory agencies may relate to our banking, investment advisory, trust, securities, and other products and services; our customers’ involvement in money laundering, fraud, securities violations and other illicit activities or our policies and practices relating to such customer activities; and our compliance with the broad range of banking, securities and other laws and regulations applicable to us. At any given time, we may be in the process of responding to subpoenas, requests for documents, data and testimony relating to such matters and engaging in discussions to resolve the matters. As of June 30, 2016 , we were subject to the following material litigation and governmental inquiries: • a class action case, Reyes v. Zions First National Bank, et. al., which was brought in the United States District Court for the Eastern District of Pennsylvania in early 2010. This case relates to payment processing services provided by Modern Payments, a small subsidiary of Zions, to ten of its customers that allegedly engaged in wrongful telemarketing practices. The plaintiff has been seeking a trebled monetary award under the federal RICO Act. During the second quarter of 2016, the parties reached an agreement in principle to settle the case for $37.50 million to $37.75 million , (with the amount within that range dependent upon the outcome of certain contingencies). A definitive settlement agreement on those terms was executed by the parties and preliminarily approved by the District Court in July 2016. The settlement agreement is subject to further court process and final approval by the District Court. These further steps are likely to take place over the remainder of 2016. There can be no assurance that the settlement agreement will ultimately be approved by the District Court or become effective. As of December 31, 2015, we had fully reserved for our obligations with respect to the settlement, so the settlement did not cause us to incur additional settlement expenses in the second quarter. A portion of the settlement amount is covered by our insurance policies and will be funded by our insurers. • a governmental inquiry into our payment processing practices relating primarily to the allegedly fraudulent telemarketers at issue in the Reyes case, discussed above (conducted by the Department of Justice). Our first contact with the Department of Justice relating to this matter occurred in early 2013. We understand that the Department of Justice desires to pursue claims against us. We have engaged in preliminary settlement discussions with the Department of Justice. There can be no assurance, however, that the parties will be able to settle this matter. • a governmental inquiry into possible money laundering activities of one of our bank customers and our anti-money laundering practices relating to that customer (conducted by the United States Attorney’s Office for the Southern District of New York). Our first contact with the United States Attorney’s Office relating to this matter occurred in early 2012. We are unclear about the status of this inquiry. • a civil suit, Liu Aifang, et al. v. Velocity VIII, et al. , (“ Aifang ”) brought against us in the United States District Court for the Central District of California in April 2015. The case relates to our banking relationships with customers who were approved promoters of an EB-5 Visa Immigrant Investment Program that allegedly misappropriated investors’ funds. On September 30, 2015, the Court granted in part and denied in part our motion to dismiss plaintiffs’ claims. The plaintiffs’ remaining claims assert negligence, conversion and that the bank aided and abetted the promoter customers’ conversion of the investors’ funds deposited with us. Fact discovery has been completed and trial is scheduled for mid-September 2016. In early August 2016 we entered into a settlement agreement with the plaintiffs. The settlement is subject to additional court process and there can be no assurance that it will ultimately become effective. We do not believe the settlement will have a material effect on our financial results. • a civil suit, Shou-En Wang v. CB&T (“Wang”), brought against us in Superior Court for Los Angeles County, Central District in April 2016. This recently filed case makes similar allegations to those in the Aifang case, but is brought by other plaintiffs. At least quarterly, we review outstanding and new legal matters, utilizing then available information. In accordance with applicable accounting guidance, if we determine that a loss from a matter is probable and the amount of the loss can be reasonably estimated, we establish an accrual for the loss. In the absence of such a determination, no accrual is made. Once established, accruals are adjusted to reflect developments relating to the matters. In our review, we also assess whether we can determine the range of reasonably possible losses for significant matters in which we are unable to determine that the likelihood of a loss is remote. Because of the difficulty of predicting the outcome of legal matters, discussed subsequently, we are able to meaningfully estimate such a range only for a limited number of matters. Based on information available as of June 30, 2016 , we estimated that the aggregate range of reasonably possible losses for those matters to be from $0 million to roughly $20 million in excess of amounts accrued. The matters underlying the estimated range will change from time to time, and actual results may vary significantly from this estimate. Those matters for which a meaningful estimate is not possible are not included within this estimated range and, therefore, this estimated range does not represent our maximum loss exposure. Based on our current knowledge, we believe that our current estimated liability for litigation and other legal actions and claims, reflected in our accruals and determined in accordance with applicable accounting guidance, is adequate and that liabilities in excess of the amounts currently accrued, if any, arising from litigation and other legal actions and claims for which an estimate as previously described is possible, will not have a material impact on our financial condition, results of operations, or cash flows. However, in light of the significant uncertainties involved in these matters, and the very large or indeterminate damages sought in some of these matters, an adverse outcome in one or more of these matters could be material to our financial condition, results of operations, or cash flows for any given reporting period. Any estimate or determination relating to the future resolution of litigation, arbitration, governmental or self-regulatory examinations, investigations or actions or similar matters is inherently uncertain and involves significant judgment. This is particularly true in the early stages of a legal matter, when legal issues and facts have not been well articulated, reviewed, analyzed, and vetted through discovery, preparation for trial or hearings, substantive and productive mediation or settlement discussions, or other actions. It is also particularly true with respect to class action and similar claims involving multiple defendants, matters with complex procedural requirements or substantive issues or novel legal theories, and examinations, investigations and other actions conducted or brought by governmental and self-regulatory agencies, in which the normal adjudicative process is not applicable. Accordingly, we usually are unable to determine whether a favorable or unfavorable outcome is remote, reasonably likely, or probable, or to estimate the amount or range of a probable or reasonably likely loss, until relatively late in the course of a legal matter, sometimes not until a number of years have elapsed. Accordingly, our judgments and estimates relating to claims will change from time to time in light of developments and actual outcomes will differ from our estimates. These differences may be material.

Retirement Plans

Retirement Plans	6 Months Ended
	Jun. 30, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Retirement Plans	RETIREMENT PLANS The following discloses the net periodic benefit cost (credit) and its components for the Company’s pension and postretirement plans: Pension benefits Supplemental retirement benefits Postretirement benefits Pension benefits Supplemental retirement benefits Postretirement benefits (In thousands) Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 Service cost $ — $ — $ — $ — $ 5 $ 8 $ — $ — $ — $ — $ 10 $ 16 Interest cost 1,762 1,783 101 101 10 10 3,525 3,566 201 201 19 20 Expected return on plan assets (2,754 ) (3,090 ) — — — — (5,509 ) (6,180 ) — — — — Amortization of net actuarial (gain) loss 1,659 1,574 29 31 (17 ) (13 ) 3,319 3,147 59 62 (33 ) (26 ) Net periodic benefit cost (credit) $ 667 $ 267 $ 130 $ 132 $ (2 ) $ 5 $ 1,335 $ 533 $ 260 $ 263 $ (4 ) $ 10 As disclosed in the Company’s 2015 Annual Report on Form 10-K, the Company has frozen its participation and benefit accruals for the pension plan and its contributions for individual benefit payments in the postretirement benefit plan.

Operating Segment Information

Operating Segment Information	6 Months Ended
	Jun. 30, 2016
Operating Segment Information [Abstract]
Operating Segment Information	. OPERATING SEGMENT INFORMATION We manage our operations and prepare management reports and other information with a primary focus on geographical area. Following the close of business on December 31, 2015, we completed the merger of our subsidiary banks and certain non-banking subsidiaries, including Zions Management Services Company (“ZMSC”), with and into a single bank, ZB, N.A. We continue to manage our banking operations under our existing brand names, including Zions Bank, Amegy Bank, California Bank & Trust, National Bank of Arizona, Nevada State Bank, Vectra Bank Colorado, and The Commerce Bank of Washington. Performance assessment and resource allocation are based upon this geographical structure. Due to the charter consolidation, we have moved to an internal funds transfer pricing allocation system to report results of operations for business segments. This process continues to be refined. Total average loans and deposits presented for the banking segments do not include intercompany amounts between banking segments, but may include deposits with the Other segment. Prior period amounts have been reclassified to reflect these changes. As of June 30, 2016 , Zions Bank operates 99 branches in Utah, 24 branches in Idaho, and one branch in Wyoming. Amegy operates 75 branches in Texas. CB&T operates 94 branches in California. NBAZ operates 65 branches in Arizona. NSB operates 49 branches in Nevada. Vectra operates 36 branches in Colorado and one branch in New Mexico. TCBW operates one branch in Washington and one branch in Oregon. Effective April 1, 2015, TCBO was merged into TCBW. The operating segment identified as “Other” includes the Parent, ZMSC, certain nonbank financial service subsidiaries, and eliminations of transactions between segments. The Parent’s operations are significant to the Other segment. The Company’s net interest income is substantially affected by the Parent’s interest expense on long-term debt. The condensed statement of income identifies the components of income and expense which affect the operating amounts presented in the Other segment. The accounting policies of the individual operating segments are the same as those of the Company. Transactions between operating segments are primarily conducted at fair value, resulting in profits that are eliminated for reporting consolidated results of operations. Operating segments pay for centrally provided services based upon estimated or actual usage of those services. The following schedule presents selected operating segment information for the three months ended June 30, 2016 and 2015 : (In millions) Zions Bank Amegy CB&T NBAZ NSB 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 158.8 $ 154.1 $ 122.0 $ 115.5 $ 114.0 $ 107.1 $ 48.3 $ 45.5 $ 30.6 $ 31.3 Provision for loan losses 0.1 (8.4 ) 30.7 13.9 4.1 (3.5 ) — 2.7 0.8 (3.0 ) Net interest income after provision for loan losses 158.7 162.5 91.3 101.6 109.9 110.6 48.3 42.8 29.8 34.3 Noninterest income 36.7 33.7 28.1 30.5 16.4 18.2 10.0 9.7 9.7 9.5 Noninterest expense 97.9 109.3 75.1 93.3 64.0 79.0 32.2 37.1 30.8 34.1 Net Income (loss) before taxes $ 97.5 $ 86.9 $ 44.3 $ 38.8 $ 62.3 $ 49.8 $ 26.1 $ 15.4 $ 8.7 $ 9.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,600 $ 12,091 $ 10,761 $ 10,159 $ 9,260 $ 8,472 $ 4,008 $ 3,846 $ 2,274 $ 2,357 Total deposits 15,977 15,953 10,959 11,246 10,882 9,865 4,582 4,292 4,103 3,902 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 29.7 $ 29.7 $ 9.5 $ 8.9 $ (48.1 ) $ (68.4 ) $ 464.8 $ 423.7 Provision for loan losses (2.7 ) (0.3 ) 1.4 (0.8 ) — — 34.4 0.6 Net interest income after provision for loan losses 32.4 30.0 8.1 9.7 (48.1 ) (68.4 ) 430.4 423.1 Noninterest income 5.5 5.3 1.4 1.0 17.9 (112.6 ) 125.7 (4.7 ) Noninterest expense 21.1 24.4 5.1 (1.5 ) 55.7 23.3 381.9 399.0 Net Income (loss) before taxes $ 16.8 $ 10.9 $ 4.4 $ 12.2 $ (85.9 ) $ (204.3 ) $ 174.2 $ 19.4 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,415 $ 2,401 $ 777 $ 721 $ 13 $ 84 $ 42,108 $ 40,131 Total deposits 2,667 2,831 947 852 (167 ) (816 ) 49,950 48,125 The following schedule presents selected operating segment information for the six months ended June 30, 2016 and 2015 : (In millions) Zions Bank Amegy CB&T NBAZ NSB 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 313.4 $ 307.1 $ 240.1 $ 232.8 $ 220.5 $ 210.7 $ 94.8 $ 89.6 $ 61.2 $ 62.2 Provision for loan losses (30.5 ) (13.0 ) 135.2 25.1 1.0 (7.6 ) 1.8 3.4 (24.7 ) (11.7 ) Net interest income after provision for loan losses 343.9 320.1 104.9 207.7 219.5 218.3 93.0 86.2 85.9 73.9 Noninterest income 72.7 64.7 57.2 59.7 32.5 32.3 19.5 17.9 19.2 18.3 Noninterest expense 195.0 216.9 160.8 186.3 132.5 153.0 64.7 74.2 61.6 66.5 Net Income (loss) before taxes $ 221.6 $ 167.9 $ 1.3 $ 81.1 $ 119.5 $ 97.6 $ 47.8 $ 29.9 $ 43.5 $ 25.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,453 $ 12,096 $ 10,566 $ 10,217 $ 9,083 $ 8,487 $ 3,936 $ 3,805 $ 2,269 $ 2,371 Total deposits 15,839 15,871 11,116 11,384 10,681 9,783 4,513 4,235 4,057 3,829 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 60.3 $ 58.5 $ 18.8 $ 17.0 $ (91.4 ) $ (136.8 ) $ 917.7 $ 841.1 Provision for loan losses (5.9 ) 3.5 (0.4 ) (0.6 ) 0.1 — 76.6 (0.9 ) Net interest income after provision for loan losses 66.2 55.0 19.2 17.6 (91.5 ) (136.8 ) 841.1 842.0 Noninterest income 11.3 10.4 2.3 2.0 27.8 (92.6 ) 242.5 112.7 Noninterest expense 42.6 48.4 10.1 6.3 110.2 40.4 777.5 792.0 Net Income (loss) before taxes $ 34.9 $ 17.0 $ 11.4 $ 13.3 $ (173.9 ) $ (269.8 ) $ 306.1 $ 162.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,434 $ 2,379 $ 755 $ 717 $ 60 $ 83 $ 41,556 $ 40,155 Total deposits 2,725 2,700 950 841 (128 ) (837 ) 49,753 47,806

Basis of Presentaion Organizati

Basis of Presentaion Organization and Presentation (Policies)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements of Zions Bancorporation (“the Parent”) and its majority-owned subsidiaries (collectively “the Company,” “Zions,” “we,” “our,” “us”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. References to GAAP, including standards promulgated by the Financial Accounting Standards Board (“FASB”), are made according to sections of the Accounting Standards Codification (“ASC”). Changes to the ASC are made with Accounting Standards Updates (“ASU”) that include consensus issues of the Emerging Issues Task Force (“EITF”). In certain cases, ASUs are issued jointly with International Financial Reporting Standards (“IFRS”). Operating results for the three and six months ended June 30, 2016 and 2015 are not necessarily indicative of the results that may be expected in future periods. In preparing the consolidated financial statements, we are required to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. The consolidated balance sheet at December 31, 2015 is from the audited financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s 2015 Annual Report on Form 10-K. Certain prior period amounts have been reclassified to conform with the current period presentation. These reclassifications did not affect net income or shareholders’ equity. Zions Bancorporation is a financial holding company headquartered in Salt Lake City, Utah, and with its subsidiaries, provides a full range of banking and related services. Following the close of business on December 31, 2015, the Company completed the merger of its subsidiary banks and other subsidiaries into a single bank, ZB, N.A. The Company continues to manage its banking operations through seven separately managed and branded segments in 11 Western and Southwestern states as follows: Zions Bank, in Utah, Idaho and Wyoming; Amegy Bank (“Amegy”), in Texas; California Bank & Trust (“CB&T”); National Bank of Arizona (“NBAZ”); Nevada State Bank (“NSB”); Vectra Bank Colorado (“Vectra”), in Colorado and New Mexico; and The Commerce Bank of Washington (“TCBW”), in Washington and Oregon. Pursuant to a Board resolution adopted November 21, 2014, The Commerce Bank of Oregon merged into TCBW following the close of business on March 31, 2015.

Supplemental Cash Flow Inform23

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2016
Supplemental Cash Flow Information [Abstract]
Schedule of Other Significant Noncash Transactions [Table Text Block]	(In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 Loans held for investment transferred to other real estate owned $ 1,318 $ 3,084 $ 7,316 $ 6,652 Loans held for sale reclassified to (from) loans held for investment 1,912 (2,395 ) 3,888 10,743 Adjusted cost of HTM securities reclassified as AFS securities — — — 79,276

Offsetting Assets and Liabili24

Offsetting Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2016
Offsetting Assets and Liabilities [Abstract]
Fair Value, by Balance Sheet Grouping [Table Text Block]	June 30, 2016 (In thousands) Gross amounts not offset in the balance sheet Description Gross amounts recognized Gross amounts offset in the balance sheet Net amounts presented in the balance sheet Financial instruments Cash collateral received/pledged Net amount Assets: Federal funds sold and security resell agreements $ 620,469 $ — $ 620,469 $ — $ — $ 620,469 Derivatives (included in other assets) 152,466 — 152,466 (28,496 ) — 123,970 $ 772,935 $ — $ 772,935 $ (28,496 ) $ — $ 744,439 Liabilities: Federal funds and other short-term borrowings $ 270,255 $ — $ 270,255 $ — $ — $ 270,255 Derivatives (included in other liabilities) 127,757 — 127,757 (28,496 ) (89,151 ) 10,110 $ 398,012 $ — $ 398,012 $ (28,496 ) $ (89,151 ) $ 280,365 December 31, 2015 (In thousands) Gross amounts not offset in the balance sheet Description Gross amounts recognized Gross amounts offset in the balance sheet Net amounts presented in the balance sheet Financial instruments Cash collateral received/pledged Net amount Assets: Federal funds sold and security resell agreements $ 619,758 $ — $ 619,758 $ — $ — $ 619,758 Derivatives (included in other assets) 77,638 — 77,638 (6,990 ) 70,648 $ 697,396 $ — $ 697,396 $ (6,990 ) $ — $ 690,406 Liabilities: Federal funds and other short-term borrowings $ 346,987 $ — $ 346,987 $ — $ — $ 346,987 Derivatives (included in other liabilities) 72,568 — 72,568 (6,990 ) (60,923 ) 4,655 $ 419,555 $ — $ 419,555 $ (6,990 ) $ (60,923 ) $ 351,642 June 30, 2016 December 31, 2015 (In thousands) Carrying value Estimated fair value Level Carrying value Estimated fair value Level Financial assets: HTM investment securities $ 713,392 $ 720,991 2 $ 545,648 $ 552,088 2 Loans and leases (including loans held for sale), net of allowance 42,039,742 42,184,148 3 40,193,374 39,535,365 3 Financial liabilities: Time deposits 2,336,088 2,343,427 2 2,130,680 2,129,742 2 Foreign deposits 117,708 117,690 2 294,391 294,321 2 Long-term debt 698,712 738,760 2 812,366 838,796 2

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Summary Of Investment Securities	June 30, 2016 (In thousands) Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 713,392 $ 12,522 $ 4,923 $ 720,991 Available-for-sale U.S. Government agencies and corporations: Agency securities 1,668,158 28,570 600 1,696,128 Agency guaranteed mortgage-backed securities 4,869,173 46,097 4,827 4,910,443 Small Business Administration loan-backed securities 2,092,969 11,383 14,930 2,089,422 Municipal securities 659,432 14,144 309 673,267 Other debt securities 25,402 141 3,987 21,556 9,315,134 100,335 24,653 9,390,816 Money market mutual funds and other 86,156 117 — 86,273 9,401,290 100,452 24,653 9,477,089 Total $ 10,114,682 $ 112,974 $ 29,576 $ 10,198,080 December 31, 2015 (In thousands) Amortized Gross unrealized gains Gross unrealized losses Estimated Held-to-maturity Municipal securities $ 545,648 $ 11,218 $ 4,778 $ 552,088 Available-for-sale U.S. Government agencies and corporations: Agency securities 1,231,740 4,313 2,658 1,233,395 Agency guaranteed mortgage-backed securities 3,964,593 7,919 36,037 3,936,475 Small Business Administration loan-backed securities 1,932,817 12,602 14,445 1,930,974 Municipal securities 417,374 2,177 856 418,695 Other debt securities 25,454 152 2,665 22,941 7,571,978 27,163 56,661 7,542,480 Money market mutual funds and other 100,612 61 37 100,636 7,672,590 27,224 56,698 7,643,116 Total $ 8,218,238 $ 38,442 $ 61,476 $ 8,195,204
Contractual Maturities Debt Securities	Held-to-maturity Available-for-sale (In thousands) Amortized cost Estimated fair value Amortized cost Estimated fair value Principal return in one year or less $ 72,693 $ 72,938 $ 1,295,398 $ 1,305,827 Principal return after one year through five years 247,119 251,539 3,773,685 3,801,514 Principal return after five years through ten years 234,328 239,120 2,720,386 2,753,721 Principal return after ten years 159,252 157,394 1,525,665 1,529,754 $ 713,392 $ 720,991 $ 9,315,134 $ 9,390,816
Summary Of Amount Of Gross Unrealized Losses For Debt Securities And Estimated Fair Value	June 30, 2016 Less than 12 months 12 months or more Total (In thousands) Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 4,280 $ 145,639 $ 643 $ 12,387 $ 4,923 $ 158,026 Available-for-sale U.S. Government agencies and corporations: Agency securities 87 23,856 513 125,850 600 149,706 Agency guaranteed mortgage-backed securities 1,004 271,185 3,823 386,971 4,827 658,156 Small Business Administration loan-backed securities 4,256 582,167 10,674 552,261 14,930 1,134,428 Municipal securities 45 24,682 264 13,879 309 38,561 Other — — 3,987 11,016 3,987 11,016 5,392 901,890 19,261 1,089,977 24,653 1,991,867 Mutual funds and other — — — — — — 5,392 901,890 19,261 1,089,977 24,653 1,991,867 Total $ 9,672 $ 1,047,529 $ 19,904 $ 1,102,364 $ 29,576 $ 2,149,893	December 31, 2015 Less than 12 months 12 months or more Total (In thousands) Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 4,521 $ 122,197 $ 257 $ 13,812 $ 4,778 $ 136,009 Available-for-sale U.S. Government agencies and corporations: Agency securities 2,176 559,196 482 131,615 2,658 690,811 Agency guaranteed mortgage-backed securities 34,583 3,639,824 1,454 65,071 36,037 3,704,895 Small Business Administration loan-backed securities 5,348 567,365 9,097 535,376 14,445 1,102,741 Municipal securities 735 102,901 121 5,733 856 108,634 Other — — 2,665 12,337 2,665 12,337 42,842 4,869,286 13,819 750,132 56,661 5,619,418 Mutual funds and other 37 35,488 — — 37 35,488 42,879 4,904,774 13,819 750,132 56,698 5,654,906 Total $ 47,400 $ 5,026,971 $ 14,076 $ 763,944 $ 61,476 $ 5,790,915
Rollforward Of Total Amount Of Credit-Related OTTI	(In thousands) Three Months Ended Six Months Ended HTM AFS Total HTM AFS Total Balance of credit-related OTTI at beginning of period $ — $ — $ — $ — $ — $ — Reductions for securities sold or paid off during the period — — — — — — Reclassification of securities from HTM to AFS — — — — — — Balance of credit-related OTTI at end of period $ — $ — $ — $ — $ — $ — (In thousands) Three Months Ended Six Months Ended HTM AFS Total HTM AFS Total Balance of credit-related OTTI at beginning of period $ — $ (103,238 ) $ (103,238 ) $ (9,079 ) $ (95,472 ) $ (104,551 ) Reductions for securities sold or paid off during the period — 103,238 103,238 — 104,551 104,551 Reclassification of securities from HTM to AFS — — — 9,079 (9,079 ) — Balance of credit-related OTTI at end of period $ — $ — $ — $ — $ — $ —
Gains And Losses, Including OTTI, Recognized In Statement Of Income	Three Months Ended Six Months Ended June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 (In thousands) Gross gains Gross losses Gross gains Gross losses Gross gains Gross losses Gross gains Gross losses Investment securities: Held-to-maturity $ — $ — $ — $ — $ — $ — $ 1 $ — Available-for-sale 30 5 7,402 146,315 60 7 8,360 147,513 Other noninterest-bearing investments 2,711 2 6,008 692 5,898 3,739 9,603 934 2,741 7 13,410 147,007 5,958 3,746 17,964 148,447 Net gains (losses) $ 2,734 $ (133,597 ) $ 2,212 $ (130,483 ) Statement of income information: Equity securities gains, net $ 2,709 $ 4,839 $ 2,159 $ 8,192 Fixed income securities gains (losses), net 25 (138,436 ) 53 (138,675 ) Net gains (losses) $ 2,734 $ (133,597 ) $ 2,212 $ (130,483 )
Tax and Nontaxable Interest Income by Investment Type [Table Text Block]	(In thousands) Three Months Ended Six Months Ended Taxable Nontaxable Total Taxable Nontaxable Total Investment securities: Held-to-maturity $ 2,572 $ 3,158 $ 5,730 $ 5,176 $ 5,884 $ 11,060 Available-for-sale 38,577 2,581 41,158 78,184 4,536 82,720 Trading 757 — 757 1,229 — 1,229 $ 41,906 $ 5,739 $ 47,645 $ 84,589 $ 10,420 $ 95,009

Loans And Allowance For Credi26

Loans And Allowance For Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment of accuring and nonaccruing troubled debt restructuring [Text Block]	Three Months Ended Six Months Ended (In thousands) Accruing Nonaccruing Total Accruing Nonaccruing Total Commercial: Commercial and industrial $ — $ 15,306 $ 15,306 $ — $ 17,433 $ 17,433 Owner occupied — 3,488 3,488 — 3,488 3,488 Total commercial — 18,794 18,794 — 20,921 20,921 Commercial real estate: Construction and land development — — — — — — Term — — — — — — Total commercial real estate — — — — — — Consumer: Home equity credit line — — — — — — 1-4 family residential — 318 318 — 318 318 Construction and other consumer real estate — — — — — — Total consumer loans — 318 318 — 318 318 Total $ — $ 19,112 $ 19,112 $ — $ 21,239 $ 21,239 Three Months Ended Six Months Ended (In thousands) Accruing Nonaccruing Total Accruing Nonaccruing Total Commercial: Commercial and industrial $ — $ 135 $ 135 $ — $ 135 $ 135 Owner occupied — 1,098 1,098 — 2,057 2,057 Total commercial — 1,233 1,233 — 2,192 2,192 Commercial real estate: Construction and land development — — — — — — Term — 846 846 — 846 846 Total commercial real estate — 846 846 — 846 846 Consumer: Home equity credit line — — — — — — 1-4 family residential — 107 107 — 107 107 Construction and other consumer real estate — — — — — — Total consumer loans — 107 107 — 107 107 Total $ — $ 2,186 $ 2,186 $ — $ 3,145 $ 3,145 Note: Total loans modified as TDRs during the 12 months previous to June 30, 2016 and 2015 were $161.6 million and $88.7 million , respectively.
Quantitative Information about Transferred Financial Assets that have been Derecognized and Other Financial Assets Managed Together [Table Text Block]	(In billions) June 30, December 31, Loan Servicing Assets $ 1.2 $ 1.3
allowance for loan losses by impairment [Table Text Block]	The ALLL and outstanding loan balances according to the Company’s impairment method are summarized as follows: June 30, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses: Individually evaluated for impairment $ 53,644 $ 3,648 $ 6,796 $ 64,088 Collectively evaluated for impairment 402,559 117,288 22,890 542,737 Purchased loans with evidence of credit deterioration 861 631 28 1,520 Total $ 457,064 $ 121,567 $ 29,714 $ 608,345 Outstanding loan balances: Individually evaluated for impairment $ 452,250 $ 102,806 $ 78,307 $ 633,363 Collectively evaluated for impairment 21,432,102 11,170,511 9,168,216 41,770,829 Purchased loans with evidence of credit deterioration 44,012 44,616 8,755 97,383 Total $ 21,928,364 $ 11,317,933 $ 9,255,278 $ 42,501,575 December 31, 2015 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses: Individually evaluated for impairment $ 36,909 $ 3,154 $ 9,462 $ 49,525 Collectively evaluated for impairment 417,295 110,417 27,866 555,578 Purchased loans with evidence of credit deterioration 73 421 451 945 Total $ 454,277 $ 113,992 $ 37,779 $ 606,048 Outstanding loan balances: Individually evaluated for impairment $ 289,629 $ 107,341 $ 92,605 $ 489,575 Collectively evaluated for impairment 21,129,125 10,193,840 8,712,079 40,035,044 Purchased loans with evidence of credit deterioration 60,260 54,722 9,941 124,923 Total $ 21,479,014 $ 10,355,903 $ 8,814,625 $ 40,649,542
Summary Of Major Portfolio Segment And Specific Loan Class	(In thousands) June 30, December 31, Loans held for sale $ 146,512 $ 149,880 Commercial: Commercial and industrial $ 13,757,123 $ 13,211,481 Leasing 426,449 441,666 Owner occupied 6,988,647 7,150,028 Municipal 756,145 675,839 Total commercial 21,928,364 21,479,014 Commercial real estate: Construction and land development 2,088,250 1,841,502 Term 9,229,683 8,514,401 Total commercial real estate 11,317,933 10,355,903 Consumer: Home equity credit line 2,507,176 2,416,357 1-4 family residential 5,680,050 5,382,099 Construction and other consumer real estate 419,299 385,240 Bankcard and other revolving plans 459,707 443,780 Other 189,046 187,149 Total consumer 9,255,278 8,814,625 Total loans $ 42,501,575 $ 40,649,542
Summary Of Changes in The Allowance For Credit Losses	Changes in the allowance for credit losses are summarized as follows: Three Months Ended June 30, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 463,987 $ 117,712 $ 30,195 $ 611,894 Additions: Provision for loan losses 25,186 9,621 (315 ) 34,492 Deductions: Gross loan and lease charge-offs (46,635 ) (7,839 ) (3,155 ) (57,629 ) Recoveries 14,526 2,073 2,989 19,588 Net loan and lease charge-offs (32,109 ) (5,766 ) (166 ) (38,041 ) Balance at end of period $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments Balance at beginning of period $ 56,267 $ 12,759 $ — $ 69,026 Provision credited to earnings (2,744 ) (1,502 ) — (4,246 ) Balance at end of period $ 53,523 $ 11,257 $ — $ 64,780 Total allowance for credit losses at end of period Allowance for loan losses $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments 53,523 11,257 — 64,780 Total allowance for credit losses $ 510,587 $ 132,824 $ 29,714 $ 673,125 Six Months Ended June 30, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 454,277 $ 113,992 $ 37,779 $ 606,048 Additions: Provision for loan losses 71,061 11,322 (5,746 ) 76,637 Deductions: Gross loan and lease charge-offs (89,865 ) (8,814 ) (7,060 ) (105,739 ) Recoveries 21,591 5,067 4,741 31,399 Net loan and lease charge-offs (68,274 ) (3,747 ) (2,319 ) (74,340 ) Balance at end of period $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments Balance at beginning of period $ 57,696 $ 16,526 $ 616 $ 74,838 Provision credited to earnings (4,173 ) (5,269 ) (616 ) (10,058 ) Balance at end of period $ 53,523 $ 11,257 $ — $ 64,780 Total allowance for credit losses at end of period Allowance for loan losses $ 457,064 $ 121,567 $ 29,714 $ 608,345 Reserve for unfunded lending commitments 53,523 11,257 — 64,780 Total allowance for credit losses $ 510,587 $ 132,824 $ 29,714 $ 673,125 Three Months Ended June 30, 2015 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses Balance at beginning of period $ 442,072 $ 131,615 $ 46,326 $ 620,013 Additions: Provision for loan losses 5,941 (4,983 ) (392 ) 566 Adjustment for FDIC-supported/PCI loans (19 ) 57 — 38 Deductions: Gross loan and lease charge-offs (23,822 ) (3,943 ) (3,283 ) (31,048 ) Recoveries 13,598 3,050 3,158 19,806 Net loan and lease charge-offs (10,224 ) (893 ) (125 ) (11,242 ) Balance at end of period $ 437,770 $ 125,796 $ 45,809 $ 609,375 Reserve for unfunded lending commitments Balance at beginning of period $ 62,775 $ 18,937 $ 575 $ 82,287 Provision credited to earnings (2,001 ) (298 ) (27 ) (2,326 ) Balance at end of period $ 60,774 $ 18,639 $ 548 $ 79,961 Total allowance for credit losses at end of period Allowance for loan losses $ 437,770 $ 125,796 $ 45,809 $ 609,375 Reserve for unfunded lending commitments 60,774 18,639 548 79,961 Total allowance for credit losses $ 498,544 $ 144,435 $ 46,357 $ 689,336
Summary Of Nonaccrual Loans	Nonaccrual loans are summarized as follows: (In thousands) June 30, December 31, Loans held for sale $ 13,570 $ — Commercial: Commercial and industrial $ 340,883 $ 163,906 Leasing 13,914 3,829 Owner occupied 69,646 73,881 Municipal 893 951 Total commercial 425,336 242,567 Commercial real estate: Construction and land development 4,610 7,045 Term 51,209 40,253 Total commercial real estate 55,819 47,298 Consumer: Home equity credit line 11,698 8,270 1-4 family residential 38,600 50,254 Construction and other consumer real estate 627 748 Bankcard and other revolving plans 1,667 537 Other 85 186 Total consumer loans 52,677 59,995 Total $ 533,832 $ 349,860
Summary Of Past Due Loans (Accruing And Nonaccruing)	Past due loans (accruing and nonaccruing) are summarized as follows: June 30, 2016 (In thousands) Current 30-89 days past due 90+ days past due Total past due Total loans Accruing loans 90+ days past due Nonaccrual loans that are current 1 Loans held for sale $ 132,942 $ — $ 13,570 $ 13,570 $ 146,512 $ — $ — Commercial: Commercial and industrial $ 13,622,079 $ 73,002 $ 62,042 $ 135,044 $ 13,757,123 $ 10,210 $ 275,451 Leasing 424,112 — 2,337 2,337 426,449 1,826 13,403 Owner occupied 6,937,243 23,486 27,918 51,404 6,988,647 4,241 39,773 Municipal 756,145 — — — 756,145 — 893 Total commercial 21,739,579 96,488 92,297 188,785 21,928,364 16,277 329,520 Commercial real estate: Construction and land development 2,062,760 23,699 1,791 25,490 2,088,250 — 2,558 Term 9,193,382 13,119 23,182 36,301 9,229,683 11,254 36,774 Total commercial real estate 11,256,142 36,818 24,973 61,791 11,317,933 11,254 39,332 Consumer: Home equity credit line 2,495,556 6,230 5,390 11,620 2,507,176 — 4,687 1-4 family residential 5,649,946 10,936 19,168 30,104 5,680,050 288 15,742 Construction and other consumer real estate 411,212 7,504 583 8,087 419,299 314 308 Bankcard and other revolving plans 456,443 2,217 1,047 3,264 459,707 861 1,332 Other 188,322 715 9 724 189,046 — 52 Total consumer loans 9,201,479 27,602 26,197 53,799 9,255,278 1,463 22,121 Total $ 42,197,200 $ 160,908 $ 143,467 $ 304,375 $ 42,501,575 $ 28,994 $ 390,973 December 31, 2015 (In thousands) Current 30-89 days past due 90+ days past due Total past due Total loans Accruing loans 90+ days past due Nonaccrual loans that are current 1 Commercial: Commercial and industrial $ 13,114,045 $ 60,523 $ 36,913 $ 97,436 $ 13,211,481 $ 3,065 $ 117,942 Leasing 440,963 183 520 703 441,666 — 3,309 Owner occupied 7,085,086 37,776 27,166 64,942 7,150,028 3,626 43,984 Municipal 668,207 7,586 46 7,632 675,839 46 951 Total commercial 21,308,301 106,068 64,645 170,713 21,479,014 6,737 166,186 Commercial real estate: Construction and land development 1,835,360 842 5,300 6,142 1,841,502 — 1,745 Term 8,469,390 10,424 34,587 45,011 8,514,401 21,697 24,867 Total commercial real estate 10,304,750 11,266 39,887 51,153 10,355,903 21,697 26,612 Consumer: Home equity credit line 2,407,972 4,717 3,668 8,385 2,416,357 — 3,053 1-4 family residential 5,340,549 14,828 26,722 41,550 5,382,099 1,036 20,939 Construction and other consumer real estate 374,987 8,593 1,660 10,253 385,240 1,337 408 Bankcard and other revolving plans 440,358 1,861 1,561 3,422 443,780 1,217 146 Other 186,436 647 66 713 187,149 — 83 Total consumer loans 8,750,302 30,646 33,677 64,323 8,814,625 3,590 24,629 Total $ 40,363,353 $ 147,980 $ 138,209 $ 286,189 $ 40,649,542 $ 32,024 $ 217,427 1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.
Summary Of Outstanding Loan Balances (Accruing And Nonaccruing) Categorized By Credit Quality Indicators	June 30, 2016 (In thousands) Pass Special Mention Sub- standard Doubtful Total loans Total allowance Commercial: Commercial and industrial $ 12,393,067 $ 316,850 $ 1,047,206 $ — $ 13,757,123 Leasing 394,633 1,601 30,215 — 426,449 Owner occupied 6,549,125 149,434 290,088 — 6,988,647 Municipal 741,826 — 14,319 — 756,145 Total commercial 20,078,651 467,885 1,381,828 — 21,928,364 $ 457,064 Commercial real estate: Construction and land development 2,015,546 64,383 8,321 — 2,088,250 Term 9,020,963 51,872 156,848 — 9,229,683 Total commercial real estate 11,036,509 116,255 165,169 — 11,317,933 121,567 Consumer: Home equity credit line 2,493,134 — 14,042 — 2,507,176 1-4 family residential 5,636,600 — 43,450 — 5,680,050 Construction and other consumer real estate 417,723 — 1,576 — 419,299 Bankcard and other revolving plans 455,721 — 3,986 — 459,707 Other 188,834 — 212 — 189,046 Total consumer loans 9,192,012 — 63,266 — 9,255,278 29,714 Total $ 40,307,172 $ 584,140 $ 1,610,263 $ — $ 42,501,575 $ 608,345 December 31, 2015 (In thousands) Pass Special Mention Sub- standard Doubtful Total loans Total allowance Commercial: Commercial and industrial $ 12,007,076 $ 399,847 $ 804,403 $ 155 $ 13,211,481 Leasing 411,131 5,166 25,369 — 441,666 Owner occupied 6,720,052 139,784 290,192 — 7,150,028 Municipal 663,903 — 11,936 — 675,839 Total commercial 19,802,162 544,797 1,131,900 155 21,479,014 $ 454,277 Commercial real estate: Construction and land development 1,786,610 42,348 12,544 — 1,841,502 Term 8,319,348 47,245 139,036 8,772 8,514,401 Total commercial real estate 10,105,958 89,593 151,580 8,772 10,355,903 113,992 Consumer: Home equity credit line 2,404,635 — 11,722 — 2,416,357 1-4 family residential 5,325,519 — 56,580 — 5,382,099 Construction and other consumer real estate 381,738 — 3,502 — 385,240 Bankcard and other revolving plans 440,282 — 3,498 — 443,780 Other 186,836 — 313 — 187,149 Total consumer loans 8,739,010 — 75,615 — 8,814,625 37,779 Total $ 38,647,130 $ 634,390 $ 1,359,095 $ 8,927 $ 40,649,542 $ 606,048
Summary Of Information On Impaired Loans	June 30, 2016 (In thousands) Unpaid principal balance Recorded investment Total recorded investment Related allowance with no allowance with allowance Commercial: Commercial and industrial $ 422,844 $ 81,883 $ 293,498 $ 375,381 $ 49,385 Owner occupied 117,779 66,143 41,654 107,797 4,166 Municipal 1,372 893 — 893 — Total commercial 541,995 148,919 335,152 484,071 53,551 Commercial real estate: Construction and land development 18,714 3,152 8,155 11,307 746 Term 125,446 84,530 22,277 106,807 1,545 Total commercial real estate 144,160 87,682 30,432 118,114 2,291 Consumer: Home equity credit line 27,658 20,796 4,175 24,971 206 1-4 family residential 58,960 26,423 29,691 56,114 6,393 Construction and other consumer real estate 3,400 963 1,853 2,816 103 Other 2,307 160 1,598 1,758 17 Total consumer loans 92,325 48,342 37,317 85,659 6,719 Total $ 778,480 $ 284,943 $ 402,901 $ 687,844 $ 62,561 December 31, 2015 (In thousands) Unpaid principal balance Recorded investment Total recorded investment Related allowance with no allowance with allowance Commercial: Commercial and industrial $ 272,161 $ 44,190 $ 163,729 $ 207,919 $ 30,538 Owner occupied 141,526 83,024 43,243 126,267 5,486 Municipal 1,430 951 — 951 — Total commercial 415,117 128,165 206,972 335,137 36,024 Commercial real estate: Construction and land development 22,791 5,076 9,558 14,634 618 Term 142,239 82,864 34,361 117,225 2,604 Total commercial real estate 165,030 87,940 43,919 131,859 3,222 Consumer: Home equity credit line 27,064 18,980 5,319 24,299 243 1-4 family residential 74,009 29,540 41,155 70,695 8,736 Construction and other consumer real estate 2,741 989 1,014 2,003 173 Other 3,187 36 2,570 2,606 299 Total consumer loans 107,001 49,545 50,058 99,603 9,451 Total $ 687,148 $ 265,650 $ 300,949 $ 566,599 $ 48,697 Three Months Ended Six Months Ended (In thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial: Commercial and industrial $ 429,681 $ 1,176 $ 317,211 $ 2,505 Owner occupied 111,165 3,131 113,198 5,557 Municipal 901 — 916 — Total commercial 541,747 4,307 431,325 8,062 Commercial real estate: Construction and land development 11,658 695 11,922 1,202 Term 98,234 3,512 96,925 6,871 Total commercial real estate 109,892 4,207 108,847 8,073 Consumer: Home equity credit line 24,609 367 24,227 744 1-4 family residential 61,481 455 60,372 901 Construction and other consumer real estate 2,829 48 2,814 95 Bankcard and other revolving plans — 1 — 17 Other 2,086 92 2,294 200 Total consumer loans 91,005 963 89,707 1,957 Total $ 742,644 $ 9,477 $ 629,879 $ 18,092
Summary Of Selected Information On TDRs That Includes Recorded Investment On An Accruing And Nonaccruing Basis By Loan Class And Modification Type	June 30, 2016 Recorded investment resulting from the following modification types: (In thousands) Interest rate below market Maturity or term extension Principal forgiveness Payment deferral Other 1 Multiple modification types 2 Total Accruing Commercial: Commercial and industrial $ 293 $ 13,341 $ 11 $ 80 $ 854 $ 38,413 $ 52,992 Owner occupied 2,181 1,106 909 — 7,793 16,919 28,908 Total commercial 2,474 14,447 920 80 8,647 55,332 81,900 Commercial real estate: Construction and land development 42 — — — — 8,146 8,188 Term 4,606 467 158 978 1,794 13,591 21,594 Total commercial real estate 4,648 467 158 978 1,794 21,737 29,782 Consumer: Home equity credit line 197 2,315 9,955 — 164 2,702 15,333 1-4 family residential 2,009 344 5,727 256 3,180 30,592 42,108 Construction and other consumer real estate 168 350 15 1,142 — 932 2,607 Other — — 124 — — — 124 Total consumer loans 2,374 3,009 15,821 1,398 3,344 34,226 60,172 Total accruing 9,496 17,923 16,899 2,456 13,785 111,295 171,854 Nonaccruing Commercial: Commercial and industrial 70 308 — 1,182 17,879 71,189 90,628 Owner occupied 1,090 859 — 2,968 266 16,761 21,944 Municipal — 893 — — — — 893 Total commercial 1,160 2,060 — 4,150 18,145 87,950 113,465 Commercial real estate: Construction and land development — 290 — — 1,726 — 2,016 Term 1,752 1,128 — — 1,967 9,531 14,378 Total commercial real estate 1,752 1,418 — — 3,693 9,531 16,394 Consumer: Home equity credit line — 601 1,589 46 — 764 3,000 1-4 family residential — 280 2,060 292 802 6,904 10,338 Construction and other consumer real estate — 92 — 37 — 53 182 Total consumer loans — 973 3,649 375 802 7,721 13,520 Total nonaccruing 2,912 4,451 3,649 4,525 22,640 105,202 143,379 Total $ 12,408 $ 22,374 $ 20,548 $ 6,981 $ 36,425 $ 216,497 $ 315,233 December 31, 2015 Recorded investment resulting from the following modification types: (In thousands) Interest rate below market Maturity or term extension Principal forgiveness Payment deferral Other 1 Multiple modification types 2 Total Accruing Commercial: Commercial and industrial $ 202 $ 3,236 $ 13 $ 100 $ 23,207 $ 34,473 $ 61,231 Owner occupied 1,999 681 929 — 9,879 16,339 29,827 Total commercial 2,201 3,917 942 100 33,086 50,812 91,058 Commercial real estate: Construction and land development 94 — — — — 9,698 9,792 Term 4,696 638 166 976 2,249 20,833 29,558 Total commercial real estate 4,790 638 166 976 2,249 30,531 39,350 Consumer: Home equity credit line 192 2,147 9,763 — 164 3,155 15,421 1-4 family residential 2,669 353 6,747 433 3,440 32,903 46,545 Construction and other consumer real estate 174 384 — — — 1,152 1,710 Other — — — — — — — Total consumer loans 3,035 2,884 16,510 433 3,604 37,210 63,676 Total accruing 10,026 7,439 17,618 1,509 38,939 118,553 194,084 Nonaccruing Commercial: Commercial and industrial 28 455 — 1,879 3,577 49,617 55,556 Owner occupied 685 1,669 — 724 34 16,335 19,447 Municipal — 951 — — — — 951 Total commercial 713 3,075 — 2,603 3,611 65,952 75,954 Commercial real estate: Construction and land development — 333 — — 3,156 208 3,697 Term 1,844 — — — 2,960 5,203 10,007 Total commercial real estate 1,844 333 — — 6,116 5,411 13,704 Consumer: Home equity credit line 7 500 1,400 54 — 233 2,194 1-4 family residential — 275 2,052 136 1,180 7,299 10,942 Construction and other consumer real estate — 101 17 48 — 44 210 Total consumer loans 7 876 3,469 238 1,180 7,576 13,346 Total nonaccruing 2,564 4,284 3,469 2,841 10,907 78,939 103,004 Total $ 12,590 $ 11,723 $ 21,087 $ 4,350 $ 49,846 $ 197,492 $ 297,088 1 Includes TDRs that resulted from other modification types including, but not limited to, a legal judgment awarded on different terms, a bankruptcy plan confirmed on different terms, a settlement that includes the delivery of collateral in exchange for debt reduction, etc. 2 Includes TDRs that resulted from a combination of any of the previous modification types.
Schedule Of Net Financial Impact On Interest Income Due To Interest Rate Modifications Below Market For Accruing TDR Loans	Three Months Ended Six Months Ended (In thousands) 2016 2015 2016 2015 Commercial: Commercial and industrial $ (79 ) $ (64 ) $ (151 ) $ (119 ) Owner occupied (50 ) (72 ) (99 ) (184 ) Total commercial (129 ) (136 ) (250 ) (303 ) Commercial real estate: Construction and land development (1 ) (26 ) (2 ) (63 ) Term (73 ) (103 ) (153 ) (212 ) Total commercial real estate (74 ) (129 ) (155 ) (275 ) Consumer: Home equity credit line — — (1 ) (1 ) 1-4 family residential (206 ) (267 ) (436 ) (538 ) Construction and other consumer real estate (5 ) (7 ) (10 ) (14 ) Total consumer loans (211 ) (274 ) (447 ) (553 ) Total decrease to interest income 1 $ (414 ) $ (539 ) $ (852 ) $ (1,131 ) 1 Calculated based on the difference between the modified rate and the premodified rate applied to the recorded investment.
Schedule Of Outstanding Balances Of All Required Payments And The Related Carrying Amounts For PCI Loans	(In thousands) June 30, 2016 December 31, 2015 Commercial $ 50,951 $ 72,440 Commercial real estate 53,083 65,167 Consumer 9,482 11,082 Outstanding balance $ 113,516 $ 148,689 Carrying amount $ 97,383 $ 125,029 Less ALLL 1,520 945 Carrying amount, net $ 95,863 $ 124,084
Schedule Of Changes In The Accretable Yield For PCI Loans	(In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 Balance at beginning of period $ 43,105 $ 50,931 $ 39,803 $ 45,055 Accretion (7,255 ) (11,674 ) (13,393 ) (21,257 ) Reclassification from nonaccretable difference 1,140 4,579 9,570 17,860 Disposals and other 1,043 2,866 2,053 5,044 Balance at end of period $ 38,033 $ 46,702 $ 38,033 $ 46,702 Note: Amounts have been adjusted based on refinements to the original estimates of the accretable yield.

Derivative Instruments And He27

Derivative Instruments And Hedging Activities Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2016
Summary of Derivative Instruments [Abstract]
Schedule of Derivative Instruments	June 30, 2016 December 31, 2015 Notional amount Fair value Notional amount Fair value (In thousands) Other assets Other liabilities Other assets Other liabilities Derivatives designated as hedging instruments Cash flow hedges: Interest rate swaps $ 1,387,500 $ 27,073 $ — $ 1,387,500 $ 5,461 $ 956 Total derivatives designated as hedging instruments 1,387,500 27,073 — 1,387,500 5,461 956 Derivatives not designated as hedging instruments Interest rate swaps and forwards 219,708 2,678 406 40,314 — 8 Interest rate swaps for customers 1 3,755,129 104,996 111,994 3,256,190 51,353 53,843 Foreign exchange 503,426 17,719 15,357 463,064 20,824 17,761 Total derivatives not designated as hedging instruments 4,478,263 125,393 127,757 3,759,568 72,177 71,612 Total derivatives $ 5,865,763 $ 152,466 $ 127,757 $ 5,147,068 $ 77,638 $ 72,568 1 Notional amounts include both the customer swaps and the offsetting derivative contracts.
Schedule Of Gain (Loss) Of Derivative Instruments	Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Amount of derivative gain (loss) recognized/reclassified (In thousands) OCI Reclassified from AOCI to interest income 2 Noninterest income (expense) Offset to interest expense OCI Reclassified from AOCI to interest income 3 Noninterest income (expense) Offset to interest expense Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ 7,794 $ 2,938 $ 28,490 $ 5,935 7,794 2,938 28,490 5,935 Fair value hedges: Terminated swaps on long-term debt $ — $ — Total derivatives designated as hedging instruments 7,794 2,938 — 28,490 5,935 — Derivatives not designated as hedging instruments Interest rate swaps and forward contracts $ 1,921 $ 2,156 Interest rate swaps for customers 1,237 728 Foreign exchange 2,432 4,668 Total derivatives not designated as hedging instruments 5,590 7,552 Total derivatives $ 7,794 $ 2,938 $ 5,590 $ — $ 28,490 $ 5,935 $ 7,552 $ — Three Months Ended June 30, 2015 Six Months Ended June 30, 2015 Amount of derivative gain (loss) recognized/reclassified (In thousands) OCI Reclassified from AOCI to interest income 2 Noninterest income (expense) Offset to interest expense OCI Reclassified from AOCI to interest income 3 Noninterest income (expense) Offset to interest expense Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ (424 ) $ 1,218 $ 3,829 $ 2,234 (424 ) 1,218 3,829 2,234 Fair value hedges: Terminated swaps on long-term debt $ 465 $ 933 Total derivatives designated as hedging instruments (424 ) 1,218 465 3,829 2,234 933 Derivatives not designated as hedging instruments Interest rate swaps for customers $ 3,873 $ 4,390 Futures contracts — 1 Foreign exchange 1,697 4,432 Total derivatives not designated as hedging instruments 5,570 8,823 Total derivatives $ (424 ) $ 1,218 $ 5,570 $ 465 $ 3,829 $ 2,234 $ 8,823 $ 933 Note: These schedules are not intended to present at any given time the Company’s long/short position with respect to its derivative contracts. 1 Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the change in fair value of the derivative. 2 Amounts for the three and six months ended June 30 , of $2.9 million and $5.9 million in 2016 , and $1.2 million and $2.2 million in 2015 , respectively, are the amounts of reclassification to earnings from AOCI presented in Note 8.

Debt And Shareholders' Equity (

Debt And Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Minimum and Maximum Interest Rate on debt repayment [Table Text Block]	Interest rate Minimum interest rate Maximum interest rate Minimum and maximum Interest rates on long-term senior debt redemptions during 1st and 2nd quarters
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt is summarized as follows: (In thousands) June 30, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,357 246,170 Senior notes 286,578 400,334 Capital lease obligations 827 912 Total $ 698,712 $ 812,366
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Amounts reclassified from AOCI 1 Statement of income (SI) Balance sheet (BS) (In thousands) Three Months Ended Six Months Ended Details about AOCI components 2016 2015 2016 2015 Affected line item Net realized gains (losses) on investment securities $ 25 $ (138,436 ) $ 53 $ (138,675 ) SI Fixed income securities gains (losses), net Income tax expense (benefit) 9 (52,772 ) 20 (52,863 ) Amounts reclassified from AOCI $ 16 $ (85,664 ) $ 33 $ (85,812 ) Net unrealized gains on derivative instruments $ 2,938 $ 1,218 $ 5,935 $ 2,234 SI Interest and fees on loans Income tax expense 1,116 465 2,255 852 Amounts Reclassified from AOCI $ 1,822 $ 753 $ 3,680 $ 1,382 1 Negative reclassification amounts indicate decreases to earnings in the statement of income and increases to balance sheet assets. The opposite applies to positive reclassification amounts.
Schedule Of Changes In Accumulated Other Comprehensive Income (Loss)	(In thousands) Net unrealized gains (losses) on investment securities Net unrealized gains (losses) on derivatives and other Pension and post-retirement Total Six Months Ended June 30, 2016 Balance at December 31, 2015 $ (18,369 ) $ 1,546 $ (37,789 ) $ (54,612 ) Other comprehensive income (loss) before reclassifications, net of tax 65,027 17,615 (665 ) 81,977 Amounts reclassified from AOCI, net of tax (33 ) (3,680 ) — (3,713 ) Other comprehensive income (loss) 64,994 13,935 (665 ) 78,264 Balance at June 30, 2016 $ 46,625 $ 15,481 $ (38,454 ) $ 23,652 Income tax expense included in other comprehensive income $ 40,322 $ 8,407 $ 665 $ 49,394 Six Months Ended June 30, 2015 Balance at December 31, 2014 $ (91,921 ) $ 2,226 $ (38,346 ) $ (128,041 ) Other comprehensive income before reclassifications, net of tax 4,131 4,308 — 8,439 Amounts reclassified from AOCI, net of tax 85,812 (1,382 ) — 84,430 Other comprehensive income 89,943 2,926 — 92,869 Balance at June 30, 2015 $ (1,978 ) $ 5,152 $ (38,346 ) $ (35,172 ) Income tax expense included in other comprehensive income $ 58,778 $ 1,867 $ — $ 60,645

Debt And Shareholders' Equity S

Debt And Shareholders' Equity Schedule of Long-term Debt Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt is summarized as follows: (In thousands) June 30, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,357 246,170 Senior notes 286,578 400,334 Capital lease obligations 827 912 Total $ 698,712 $ 812,366

Debt And Shareholders' Equity J

Debt And Shareholders' Equity Junior Subordinated Notes (Tables)	6 Months Ended
	Jun. 30, 2016
Subordinated Debt [Member]
Subordinated Borrowing [Line Items]
JUNIORSUBORDINATEDNOTES1 [Table Text Block]	(In thousands) Balance Coupon rate 1 Next payment date Amegy Statutory Trust I $ 51,547 3mL+2.85% September 17, 2016 Amegy Statutory Trust II 36,083 3mL+1.90% October 7, 2016 Amegy Statutory Trust III 61,856 3mL+1.78% September 15, 2016 Stockmen’s Statutory Trust II 7,732 3mL+3.15% September 26, 2016 Stockmen’s Statutory Trust III 7,732 3mL+2.89% September 17, 2016 Total $ 164,950

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis	(In thousands) June 30, 2016 Level 1 Level 2 Level 3 Total ASSETS Investment securities: Available-for-sale: U.S. Treasury, agencies and corporations $ — $ 8,695,993 $ — $ 8,695,993 Municipal securities 673,267 673,267 Other debt securities 21,556 21,556 Money market mutual funds and other 85,545 728 86,273 85,545 9,391,544 — 9,477,089 Trading account 118,775 118,775 Other noninterest-bearing investments: Bank-owned life insurance 491,725 491,725 Private equity investments 122,257 122,257 Other assets: Agriculture loan servicing and interest-only strips 18,228 18,228 Deferred compensation plan assets 83,706 83,706 Derivatives: Interest rate swaps and forwards 29,751 29,751 Interest rate swaps for customers 104,996 104,996 Foreign currency exchange contracts 17,719 17,719 17,719 134,747 — 152,466 $ 186,970 $ 10,136,791 $ 140,485 $ 10,464,246 LIABILITIES Securities sold, not yet purchased $ 1,609 $ — $ — $ 1,609 Other liabilities: Deferred compensation plan obligations 83,706 83,706 Derivatives: Interest rate swaps and forwards 406 406 Interest rate swaps for customers 111,994 111,994 Foreign currency exchange contracts 15,357 15,357 15,357 112,400 — 127,757 $ 100,672 $ 112,400 $ — $ 213,072 (In thousands) December 31, 2015 Level 1 Level 2 Level 3 Total ASSETS Investment securities: Available-for-sale: U.S. Treasury, agencies and corporations $ — $ 7,100,844 $ — $ 7,100,844 Municipal securities 418,695 418,695 Other debt securities 22,941 22,941 Money market mutual funds and other 61,807 38,829 100,636 61,807 7,581,309 — 7,643,116 Trading account 48,168 48,168 Other noninterest-bearing investments: Bank-owned life insurance 485,978 485,978 Private equity investments 120,027 120,027 Other assets: Agriculture loan servicing and interest-only strips 13,514 13,514 Deferred compensation plan assets 84,570 84,570 Derivatives: Interest rate swaps and forwards 5,966 5,966 Interest rate swaps for customers 51,353 51,353 Foreign currency exchange contracts 20,824 20,824 20,824 57,319 — 78,143 $ 167,201 $ 8,172,774 $ 133,541 $ 8,473,516 LIABILITIES Securities sold, not yet purchased $ 30,158 $ — $ — $ 30,158 Other liabilities: Deferred compensation plan obligations 84,570 84,570 Derivatives: Interest rate swaps and forwards 835 835 Interest rate swaps for customers 53,843 53,843 Foreign currency exchange contracts 17,761 17,761 17,761 54,678 — 72,439 $ 132,489 $ 54,678 $ — $ 187,167
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs	Level 3 Instruments Three Months Ended June 30, 2016 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at March 31, 2016 $ — $ — $ — $ 119,222 $ 17,067 $ — Net gains (losses) included in: Statement of income: Dividends and other investment income 130 Equity securities gains, net 2,555 Other noninterest income 1,531 Purchases 4,515 Sales (3,378 ) Redemptions and paydowns (787 ) (370 ) Balance at June 30, 2016 $ — $ — $ — $ 122,257 $ 18,228 $ — Level 3 Instruments Six Months Ended June 30, 2016 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at December 31, 2015 $ — $ — $ — $ 120,027 $ 13,514 $ — Net gains (losses) included in: Statement of income: Dividends and other investment losses (1,354 ) Equity securities gains, net 546 Other noninterest income 4,991 Purchases 7,316 368 Sales (3,414 ) Redemptions and paydowns (864 ) (645 ) Balance at June 30, 2016 $ — $ — $ — $ 122,257 $ 18,228 $ — Level 3 Instruments Three Months Ended June 30, 2015 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at March 31, 2015 $ 2,465 $ 438,338 $ 4,803 $ 105,232 $ 12,001 $ — Net gains (losses) included in: Statement of income: Accretion of purchase discount on securities available-for-sale 1 214 Dividends and other investment losses (1,633 ) Equity securities gains, net 714 Fixed income securities losses, net (375 ) (136,368 ) (606 ) Other noninterest income 1,483 Other comprehensive income (loss) 560 148,496 (116 ) Purchases 7,262 210 Sales (2,651 ) (437,442 ) (4,081 ) (991 ) Redemptions and paydowns (13,238 ) (469 ) (192 ) Balance at June 30, 2015 $ — $ — $ — $ 110,115 $ 13,502 $ — Level 3 Instruments Six Months Ended June 30, 2015 (In thousands) Municipal securities Trust preferred – banks and insurance Other Private equity investments Ag loan svcg and int-only strips Derivatives and other liabilities Balance at December 31, 2014 $ 4,164 $ 393,007 $ 4,761 $ 97,649 $ 12,227 $ (13 ) Net gains (losses) included in: Statement of income: Accretion of purchase discount on securities available-for-sale 3 471 Dividends and other investment losses (559 ) Equity securities gains, net 3,967 Fixed income securities losses, net (344 ) (136,691 ) (606 ) Other noninterest income 1,487 Other noninterest expense 13 Other comprehensive income (loss) 687 141,547 (74 ) Fair value of HTM securities reclassified as AFS 57,308 Purchases 12,314 381 Sales (2,651 ) (440,055 ) (4,081 ) (2,508 ) Redemptions and paydowns (1,859 ) (15,587 ) (748 ) (593 ) Balance at June 30, 2015 $ — $ — $ — $ 110,115 $ 13,502 $ —
Schedule Of Realized Gains (Losses) Using Level 3 Inputs	(In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 Dividends and other investment income $ — $ 4 $ — $ 4 Fixed income securities losses, net — (137,349 ) — (137,641 ) Equity securities gains (losses), net 93 (674 ) 93 (674 )
Schedule Of Assets With Fair Value Changes On Nonrecurring Basis	(In thousands) Fair value at June 30, 2016 Fair value at December 31, 2015 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total ASSETS Private equity investments, carried at cost $ — $ — $ 1,477 $ 1,477 $ — $ — $ 10,707 $ 10,707 Impaired loans — 51,033 — 51,033 — 10,991 — 10,991 Other real estate owned — 3,660 — 3,660 — 2,388 — 2,388 $ — $ 54,693 $ 1,477 $ 56,170 $ — $ 13,379 $ 10,707 $ 24,086 The previous fair values may not be current as of the dates indicated, but rather as of the date the fair value change occurred, such as a charge for impairment. Accordingly, carrying values may not equal current fair value. Gains (losses) from fair value changes (In thousands) Three Months Ended Six Months Ended 2016 2015 2016 2015 ASSETS Private equity investments, carried at cost $ — $ (1,125 ) $ (342 ) $ (2,278 ) Impaired loans (14,796 ) (2,808 ) (29,487 ) (5,357 ) Other real estate owned (563 ) (310 ) (600 ) (1,318 ) $ (15,359 ) $ (4,243 ) $ (30,429 ) $ (8,953 )
Fair Value, by Balance Sheet Grouping [Table Text Block]	June 30, 2016 (In thousands) Gross amounts not offset in the balance sheet Description Gross amounts recognized Gross amounts offset in the balance sheet Net amounts presented in the balance sheet Financial instruments Cash collateral received/pledged Net amount Assets: Federal funds sold and security resell agreements $ 620,469 $ — $ 620,469 $ — $ — $ 620,469 Derivatives (included in other assets) 152,466 — 152,466 (28,496 ) — 123,970 $ 772,935 $ — $ 772,935 $ (28,496 ) $ — $ 744,439 Liabilities: Federal funds and other short-term borrowings $ 270,255 $ — $ 270,255 $ — $ — $ 270,255 Derivatives (included in other liabilities) 127,757 — 127,757 (28,496 ) (89,151 ) 10,110 $ 398,012 $ — $ 398,012 $ (28,496 ) $ (89,151 ) $ 280,365 December 31, 2015 (In thousands) Gross amounts not offset in the balance sheet Description Gross amounts recognized Gross amounts offset in the balance sheet Net amounts presented in the balance sheet Financial instruments Cash collateral received/pledged Net amount Assets: Federal funds sold and security resell agreements $ 619,758 $ — $ 619,758 $ — $ — $ 619,758 Derivatives (included in other assets) 77,638 — 77,638 (6,990 ) 70,648 $ 697,396 $ — $ 697,396 $ (6,990 ) $ — $ 690,406 Liabilities: Federal funds and other short-term borrowings $ 346,987 $ — $ 346,987 $ — $ — $ 346,987 Derivatives (included in other liabilities) 72,568 — 72,568 (6,990 ) (60,923 ) 4,655 $ 419,555 $ — $ 419,555 $ (6,990 ) $ (60,923 ) $ 351,642 June 30, 2016 December 31, 2015 (In thousands) Carrying value Estimated fair value Level Carrying value Estimated fair value Level Financial assets: HTM investment securities $ 713,392 $ 720,991 2 $ 545,648 $ 552,088 2 Loans and leases (including loans held for sale), net of allowance 42,039,742 42,184,148 3 40,193,374 39,535,365 3 Financial liabilities: Time deposits 2,336,088 2,343,427 2 2,130,680 2,129,742 2 Foreign deposits 117,708 117,690 2 294,391 294,321 2 Long-term debt 698,712 738,760 2 812,366 838,796 2

Commitments, Guarantees, And 32

Commitments, Guarantees, And Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2016
Guarantees, Commitments And Contingencies [Abstract]
Schedule Of Guarantees Issued	(In thousands) June 30, December 31, Net unfunded commitments to extend credit 1 $ 17,524,020 $ 17,169,785 Standby letters of credit: Financial 771,167 661,554 Performance 204,922 216,843 Commercial letters of credit 46,254 18,447 Total unfunded lending commitments $ 18,546,363 $ 18,066,629

Retirement Plans (Tables)

Retirement Plans (Tables)	6 Months Ended
	Jun. 30, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans	Pension benefits Supplemental retirement benefits Postretirement benefits Pension benefits Supplemental retirement benefits Postretirement benefits (In thousands) Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 Service cost $ — $ — $ — $ — $ 5 $ 8 $ — $ — $ — $ — $ 10 $ 16 Interest cost 1,762 1,783 101 101 10 10 3,525 3,566 201 201 19 20 Expected return on plan assets (2,754 ) (3,090 ) — — — — (5,509 ) (6,180 ) — — — — Amortization of net actuarial (gain) loss 1,659 1,574 29 31 (17 ) (13 ) 3,319 3,147 59 62 (33 ) (26 ) Net periodic benefit cost (credit) $ 667 $ 267 $ 130 $ 132 $ (2 ) $ 5 $ 1,335 $ 533 $ 260 $ 263 $ (4 ) $ 10

Operating Segment Information (

Operating Segment Information (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting Information [Line Items]
Operating Segment Information	. OPERATING SEGMENT INFORMATION We manage our operations and prepare management reports and other information with a primary focus on geographical area. Following the close of business on December 31, 2015, we completed the merger of our subsidiary banks and certain non-banking subsidiaries, including Zions Management Services Company (“ZMSC”), with and into a single bank, ZB, N.A. We continue to manage our banking operations under our existing brand names, including Zions Bank, Amegy Bank, California Bank & Trust, National Bank of Arizona, Nevada State Bank, Vectra Bank Colorado, and The Commerce Bank of Washington. Performance assessment and resource allocation are based upon this geographical structure. Due to the charter consolidation, we have moved to an internal funds transfer pricing allocation system to report results of operations for business segments. This process continues to be refined. Total average loans and deposits presented for the banking segments do not include intercompany amounts between banking segments, but may include deposits with the Other segment. Prior period amounts have been reclassified to reflect these changes. As of June 30, 2016 , Zions Bank operates 99 branches in Utah, 24 branches in Idaho, and one branch in Wyoming. Amegy operates 75 branches in Texas. CB&T operates 94 branches in California. NBAZ operates 65 branches in Arizona. NSB operates 49 branches in Nevada. Vectra operates 36 branches in Colorado and one branch in New Mexico. TCBW operates one branch in Washington and one branch in Oregon. Effective April 1, 2015, TCBO was merged into TCBW. The operating segment identified as “Other” includes the Parent, ZMSC, certain nonbank financial service subsidiaries, and eliminations of transactions between segments. The Parent’s operations are significant to the Other segment. The Company’s net interest income is substantially affected by the Parent’s interest expense on long-term debt. The condensed statement of income identifies the components of income and expense which affect the operating amounts presented in the Other segment. The accounting policies of the individual operating segments are the same as those of the Company. Transactions between operating segments are primarily conducted at fair value, resulting in profits that are eliminated for reporting consolidated results of operations. Operating segments pay for centrally provided services based upon estimated or actual usage of those services. The following schedule presents selected operating segment information for the three months ended June 30, 2016 and 2015 : (In millions) Zions Bank Amegy CB&T NBAZ NSB 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 158.8 $ 154.1 $ 122.0 $ 115.5 $ 114.0 $ 107.1 $ 48.3 $ 45.5 $ 30.6 $ 31.3 Provision for loan losses 0.1 (8.4 ) 30.7 13.9 4.1 (3.5 ) — 2.7 0.8 (3.0 ) Net interest income after provision for loan losses 158.7 162.5 91.3 101.6 109.9 110.6 48.3 42.8 29.8 34.3 Noninterest income 36.7 33.7 28.1 30.5 16.4 18.2 10.0 9.7 9.7 9.5 Noninterest expense 97.9 109.3 75.1 93.3 64.0 79.0 32.2 37.1 30.8 34.1 Net Income (loss) before taxes $ 97.5 $ 86.9 $ 44.3 $ 38.8 $ 62.3 $ 49.8 $ 26.1 $ 15.4 $ 8.7 $ 9.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,600 $ 12,091 $ 10,761 $ 10,159 $ 9,260 $ 8,472 $ 4,008 $ 3,846 $ 2,274 $ 2,357 Total deposits 15,977 15,953 10,959 11,246 10,882 9,865 4,582 4,292 4,103 3,902 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 29.7 $ 29.7 $ 9.5 $ 8.9 $ (48.1 ) $ (68.4 ) $ 464.8 $ 423.7 Provision for loan losses (2.7 ) (0.3 ) 1.4 (0.8 ) — — 34.4 0.6 Net interest income after provision for loan losses 32.4 30.0 8.1 9.7 (48.1 ) (68.4 ) 430.4 423.1 Noninterest income 5.5 5.3 1.4 1.0 17.9 (112.6 ) 125.7 (4.7 ) Noninterest expense 21.1 24.4 5.1 (1.5 ) 55.7 23.3 381.9 399.0 Net Income (loss) before taxes $ 16.8 $ 10.9 $ 4.4 $ 12.2 $ (85.9 ) $ (204.3 ) $ 174.2 $ 19.4 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,415 $ 2,401 $ 777 $ 721 $ 13 $ 84 $ 42,108 $ 40,131 Total deposits 2,667 2,831 947 852 (167 ) (816 ) 49,950 48,125 The following schedule presents selected operating segment information for the six months ended June 30, 2016 and 2015 : (In millions) Zions Bank Amegy CB&T NBAZ NSB 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 313.4 $ 307.1 $ 240.1 $ 232.8 $ 220.5 $ 210.7 $ 94.8 $ 89.6 $ 61.2 $ 62.2 Provision for loan losses (30.5 ) (13.0 ) 135.2 25.1 1.0 (7.6 ) 1.8 3.4 (24.7 ) (11.7 ) Net interest income after provision for loan losses 343.9 320.1 104.9 207.7 219.5 218.3 93.0 86.2 85.9 73.9 Noninterest income 72.7 64.7 57.2 59.7 32.5 32.3 19.5 17.9 19.2 18.3 Noninterest expense 195.0 216.9 160.8 186.3 132.5 153.0 64.7 74.2 61.6 66.5 Net Income (loss) before taxes $ 221.6 $ 167.9 $ 1.3 $ 81.1 $ 119.5 $ 97.6 $ 47.8 $ 29.9 $ 43.5 $ 25.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,453 $ 12,096 $ 10,566 $ 10,217 $ 9,083 $ 8,487 $ 3,936 $ 3,805 $ 2,269 $ 2,371 Total deposits 15,839 15,871 11,116 11,384 10,681 9,783 4,513 4,235 4,057 3,829 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 60.3 $ 58.5 $ 18.8 $ 17.0 $ (91.4 ) $ (136.8 ) $ 917.7 $ 841.1 Provision for loan losses (5.9 ) 3.5 (0.4 ) (0.6 ) 0.1 — 76.6 (0.9 ) Net interest income after provision for loan losses 66.2 55.0 19.2 17.6 (91.5 ) (136.8 ) 841.1 842.0 Noninterest income 11.3 10.4 2.3 2.0 27.8 (92.6 ) 242.5 112.7 Noninterest expense 42.6 48.4 10.1 6.3 110.2 40.4 777.5 792.0 Net Income (loss) before taxes $ 34.9 $ 17.0 $ 11.4 $ 13.3 $ (173.9 ) $ (269.8 ) $ 306.1 $ 162.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,434 $ 2,379 $ 755 $ 717 $ 60 $ 83 $ 41,556 $ 40,155 Total deposits 2,725 2,700 950 841 (128 ) (837 ) 49,753 47,806
Schedule of Segment Reporting Information, by Segment	(In millions) Zions Bank Amegy CB&T NBAZ NSB 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 158.8 $ 154.1 $ 122.0 $ 115.5 $ 114.0 $ 107.1 $ 48.3 $ 45.5 $ 30.6 $ 31.3 Provision for loan losses 0.1 (8.4 ) 30.7 13.9 4.1 (3.5 ) — 2.7 0.8 (3.0 ) Net interest income after provision for loan losses 158.7 162.5 91.3 101.6 109.9 110.6 48.3 42.8 29.8 34.3 Noninterest income 36.7 33.7 28.1 30.5 16.4 18.2 10.0 9.7 9.7 9.5 Noninterest expense 97.9 109.3 75.1 93.3 64.0 79.0 32.2 37.1 30.8 34.1 Net Income (loss) before taxes $ 97.5 $ 86.9 $ 44.3 $ 38.8 $ 62.3 $ 49.8 $ 26.1 $ 15.4 $ 8.7 $ 9.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,600 $ 12,091 $ 10,761 $ 10,159 $ 9,260 $ 8,472 $ 4,008 $ 3,846 $ 2,274 $ 2,357 Total deposits 15,977 15,953 10,959 11,246 10,882 9,865 4,582 4,292 4,103 3,902 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 29.7 $ 29.7 $ 9.5 $ 8.9 $ (48.1 ) $ (68.4 ) $ 464.8 $ 423.7 Provision for loan losses (2.7 ) (0.3 ) 1.4 (0.8 ) — — 34.4 0.6 Net interest income after provision for loan losses 32.4 30.0 8.1 9.7 (48.1 ) (68.4 ) 430.4 423.1 Noninterest income 5.5 5.3 1.4 1.0 17.9 (112.6 ) 125.7 (4.7 ) Noninterest expense 21.1 24.4 5.1 (1.5 ) 55.7 23.3 381.9 399.0 Net Income (loss) before taxes $ 16.8 $ 10.9 $ 4.4 $ 12.2 $ (85.9 ) $ (204.3 ) $ 174.2 $ 19.4 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,415 $ 2,401 $ 777 $ 721 $ 13 $ 84 $ 42,108 $ 40,131 Total deposits 2,667 2,831 947 852 (167 ) (816 ) 49,950 48,125 The following schedule presents selected operating segment information for the six months ended June 30, 2016 and 2015 : (In millions) Zions Bank Amegy CB&T NBAZ NSB 2016 2015 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 313.4 $ 307.1 $ 240.1 $ 232.8 $ 220.5 $ 210.7 $ 94.8 $ 89.6 $ 61.2 $ 62.2 Provision for loan losses (30.5 ) (13.0 ) 135.2 25.1 1.0 (7.6 ) 1.8 3.4 (24.7 ) (11.7 ) Net interest income after provision for loan losses 343.9 320.1 104.9 207.7 219.5 218.3 93.0 86.2 85.9 73.9 Noninterest income 72.7 64.7 57.2 59.7 32.5 32.3 19.5 17.9 19.2 18.3 Noninterest expense 195.0 216.9 160.8 186.3 132.5 153.0 64.7 74.2 61.6 66.5 Net Income (loss) before taxes $ 221.6 $ 167.9 $ 1.3 $ 81.1 $ 119.5 $ 97.6 $ 47.8 $ 29.9 $ 43.5 $ 25.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,453 $ 12,096 $ 10,566 $ 10,217 $ 9,083 $ 8,487 $ 3,936 $ 3,805 $ 2,269 $ 2,371 Total deposits 15,839 15,871 11,116 11,384 10,681 9,783 4,513 4,235 4,057 3,829 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 60.3 $ 58.5 $ 18.8 $ 17.0 $ (91.4 ) $ (136.8 ) $ 917.7 $ 841.1 Provision for loan losses (5.9 ) 3.5 (0.4 ) (0.6 ) 0.1 — 76.6 (0.9 ) Net interest income after provision for loan losses 66.2 55.0 19.2 17.6 (91.5 ) (136.8 ) 841.1 842.0 Noninterest income 11.3 10.4 2.3 2.0 27.8 (92.6 ) 242.5 112.7 Noninterest expense 42.6 48.4 10.1 6.3 110.2 40.4 777.5 792.0 Net Income (loss) before taxes $ 34.9 $ 17.0 $ 11.4 $ 13.3 $ (173.9 ) $ (269.8 ) $ 306.1 $ 162.7 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,434 $ 2,379 $ 755 $ 717 $ 60 $ 83 $ 41,556 $ 40,155 Total deposits 2,725 2,700 950 841 (128 ) (837 ) 49,753 47,806

Basis of Presentaion (Details)

Basis of Presentaion (Details)	Jun. 30, 2016States
Basis Of Presentation [Abstract]
Number of States in which Entity Operates	11

Supplemental Cash Flow Inform36

Supplemental Cash Flow Information (Schedule Of Noncash Activities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Significant Noncash Transactions [Line Items]
Loans and Leases Transfered to Other Real Estate Owned	$ 1,318	$ 3,084	$ 7,316	$ 6,652
Loans Held for Sale Reclassified as Loans Held For Investment	(1,912)	(2,395)	(3,888)	(10,743)
Amortized Cost of HTM Securities Reclassified as AFS Securities	$ 0	$ 0	$ 0	$ 79,276

Offsetting Assets and Liabili37

Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member] | Assets [Member]
Offsetting Assets [Line Items]
Net amount	$ 620,469	$ 619,758
Gross amounts recognized	620,469	619,758
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	620,469	619,758
Gross amounts not offset in the balance sheet	0	0
Cash Collateral Received/Pledged	0	0
Derivative Financial Instruments, Assets [Member] | Assets [Member]
Offsetting Assets [Line Items]
Net amount	123,970	70,648
Gross amounts recognized	152,466	77,638
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	152,466	77,638
Gross amounts not offset in the balance sheet	(28,496)	(6,990)
Cash Collateral Received/Pledged	0
Assets, Total [Member] | Assets [Member]
Offsetting Assets [Line Items]
Net amount	744,439	690,406
Gross amounts recognized	772,935	697,396
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	772,935	697,396
Gross amounts not offset in the balance sheet	(28,496)	(6,990)
Cash Collateral Received/Pledged	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member] | Other Liabilities [Member]
Offsetting Assets [Line Items]
Net amount	270,255	346,987
Gross amounts recognized	270,255	346,987
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	270,255	346,987
Gross amounts not offset in the balance sheet	0	0
Cash Collateral Received/Pledged	0	0
Derivative Financial Instruments, Liabilities [Member] | Other Liabilities [Member]
Offsetting Assets [Line Items]
Net amount	10,110	4,655
Gross amounts recognized	127,757	72,568
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	127,757	72,568
Gross amounts not offset in the balance sheet	(28,496)	(6,990)
Cash Collateral Received/Pledged	(89,151)	(60,923)
Liabilities, Total [Member] | Other Liabilities [Member]
Offsetting Assets [Line Items]
Net amount	280,365	351,642
Gross amounts recognized	398,012	419,555
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	398,012	419,555
Gross amounts not offset in the balance sheet	(28,496)	(6,990)
Cash Collateral Received/Pledged	$ (89,151)	$ (60,923)

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Thousands	Jun. 30, 2016USD ($)Securitiesyr	Dec. 31, 2015USD ($)Securities	Jun. 30, 2016USD ($)Securities	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)Securities	Jun. 30, 2016USD ($)Securities
Investment [Line Items]
Sale of CDO, Amortized Cost				$ 574,000
Held-to-maturity, Amortized cost	$ 713,392		$ 713,392			$ 713,392
Private equity investments prohibited by Volker rule	$ 7,000		$ 7,000			$ 7,000
Number of HTM investment securities in an unrealized loss position | Securities	135	187	135		187	135
Number of AFS investment securities in an unrealized loss position | Securities	470	709	470		709	470
Carrying value of pledged securities	$ 1,700,000	$ 2,300,000	$ 1,700,000		$ 2,300,000	$ 1,700,000
Private Equity Investments	133,000		133,000			133,000
Realized Losses on Sales of CDOs				(137,000)
Private Equity Investments Sold Prohibited by Volcker Rule			9,000		9,000	18,000
Commitments for Private Equity and Other Noninterest-bearing Investments	20,000		20,000			20,000
Commitments for Private Equity or Other Non-Interest Bearing Investments Prohibited by the Volcker Rule	$ 2,000		2,000			2,000
Small Business Administration Loan-Backed Securities [Member] | Minimum [Member]
Investment [Line Items]
Investment term of maturity | yr	5
Small Business Administration Loan-Backed Securities [Member] | Maximum [Member]
Investment [Line Items]
Investment term of maturity | yr	25
Municipal Securities [Member]
Investment [Line Items]
Held-to-maturity, Amortized cost	$ 713,392	545,648	$ 713,392		$ 545,648	$ 713,392
Held To Maturity Securities Gross Unrealized Losses	$ 4,923	$ 4,778
Asset-backed Securities [Member] | Trust Preferred Securities - Banks And Insurance [Member]
Investment [Line Items]
Held-to-maturity, Amortized cost				$ 79,000

Investment Securities (Summary

Investment Securities (Summary Of Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Investment [Line Items]
Held-to-maturity, fair value	$ 720,991	$ 552,088
Held-to-maturity, Amortized cost	713,392
Available-for-sale Debt Securities, Amortized Cost Basis	9,315,134	7,571,978
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	100,335	27,163
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	24,653	56,661
Available-for-sale debt securities, Estimated fair value	9,390,816	7,542,480
Available-for-sale Securities, Gross Unrealized Gain	100,452	27,224
Available-for-sale, Amortized cost	9,401,290	7,672,590
Available-for-sale, Gross unrealized losses, Recognized in OCI	24,653	56,698
Available-for-sale securities, Estimated fair value	9,477,089	7,643,116
amortized cost of investment securities	10,114,682	8,218,238
Gross Unrealized Gains of Investment Securities Recognized in OCI	112,974	38,442
Gross Unrealized Losses of Investment Securities Recognized in OCI	29,576	61,476
Estimated Fair Value of Investment Securities	10,198,080	8,195,204
Mutual Funds And Stock [Member]
Investment [Line Items]
Available-for-sale Securities, Gross Unrealized Gain	117	61
Available-for-sale, Amortized cost	86,156	100,612
Available-for-sale, Gross unrealized losses, Recognized in OCI	0	37
Available-for-sale securities, Estimated fair value	86,273	100,636
Municipal Securities [Member]
Investment [Line Items]
Held-to-maturity, fair value	720,991	552,088
Held-to-maturity, Amortized cost	713,392	545,648
Available-for-sale Debt Securities, Amortized Cost Basis	659,432	417,374
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	14,144	2,177
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	309	856
Available-for-sale debt securities, Estimated fair value	673,267	418,695
Held-to-maturity Securities, Unrecognized Holding Gain	12,522	11,218
Held-to-maturity Securities, Unrecognized Holding Loss	4,923	4,778
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	25,402	25,454
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	3,987	2,665
Available-for-sale, Other debt securities [Member]
Investment [Line Items]
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	141	152
Available-for-sale debt securities, Estimated fair value	21,556	22,941
Trust Preferred Securities - Banks And Insurance [Member] | Asset-backed Securities [Member]
Investment [Line Items]
Held-to-maturity, Amortized cost			$ 79,000
Agency Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,668,158	1,231,740
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	28,570	4,313
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	600	2,658
Available-for-sale debt securities, Estimated fair value	1,696,128	1,233,395
Agency Guaranteed Mortgage-Backed Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	4,869,173	3,964,593
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	46,097	7,919
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	4,827	36,037
Available-for-sale debt securities, Estimated fair value	4,910,443	3,936,475
Small Business Administration Loan-Backed Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	2,092,969	1,932,817
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	11,383	12,602
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	14,930	14,445
Available-for-sale debt securities, Estimated fair value	$ 2,089,422	$ 1,930,974

Investment Securities (Contract

Investment Securities (Contractual Maturities Debt Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments [Abstract]
Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost	$ 72,693
Held-to-maturity, Due in one year or less, Estimated fair value	72,938
Held-to-maturity, Due after one year through five years, Amortized cost	247,119
Held-to-maturity, Due after one year through five years, Estimated fair value	251,539
Held-to-maturity, Due after five years through ten years, Amortized cost	234,328
Held-to-maturity, Due after five years through ten years, Estimated fair value	239,120
Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Amortized Cost	159,252
Held-to-maturity, Due after ten years, Estimated fair value	157,394
Held-to-maturity, Amortized cost	713,392
Held-to-maturity, fair value	720,991
Available-for-sale, Due in one year or less, Amortized cost	1,295,398
Available-for-sale, Due in one year or less, Estimated fair value	1,305,827
Available-for-sale, Due after one year through five years, Amortized cost	3,773,685
Available-for-sale, Due after one year through five years, Estimated fair value	3,801,514
Available-for-sale, Due after five years through ten years, Amortized cost	2,720,386
Available-for-sale, Due after five years through ten years, Estimated fair value	2,753,721
Available-for-sale, Due after ten years, Amortized cost	1,525,665
Available-for-sale, Due after ten years, Estimated fair value	1,529,754
Available-for-sale, Amortized cost	9,315,134	$ 7,571,978
Available-for-sale, Estimated fair value	$ 9,390,816	$ 7,542,480

Investment Securities (Summar41

Investment Securities (Summary Of Amount Of Gross Unrealized Losses For Debt Securities And Estimated Fair Value) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	$ 5,392	$ 42,879
Available-for-sale, Less than 12 months - Estimated fair value	901,890	4,904,774
Available-for-sale, 12 months or more - Gross unrealized losses	19,261	13,819
Available-for-sale, 12 months or more - Estimated fair value	1,089,977	750,132
Available-for-sale, Total - Gross unrealized losses	24,653	56,698
Available-for-sale, Total - Estimated fair value	1,991,867	5,654,906
Investment Securities Gross Unrealized Losses Less Than 12 Months	9,672	47,400
Investment Securities Estimated Fair Value Less Than 12 Months	1,047,529	5,026,971
Investment Securities Gross Unrealized Losses 12 Months or More	19,904	14,076
Investment Securities Estimated Fair Value 12 Months or More	1,102,364	763,944
Investment Securities Gross Unrealized Losses Total	29,576	61,476
Investment Securities Estimated Fair Value Total	2,149,893	5,790,915
Municipal Securities [Member]
Investment [Line Items]
Held-to-maturity, Less than 12 months - Gross unrealized losses	4,280	4,521
Held-to-maturity, Less than 12 months - Estimated fair value	145,639	122,197
Held-to-maturity, 12 months or more - Gross unrealized losses	643	257
Held-to-maturity, 12 months or more - Estimated fair value	12,387	13,812
Held-to-maturity, Total - Gross unrealized losses	4,923	4,778
Held-to-maturity, Total - Estimated fair value	158,026	136,009
Available-for-sale, Less than 12 months - Gross unrealized losses	45	735
Available-for-sale, Less than 12 months - Estimated fair value	24,682	102,901
Available-for-sale, 12 months or more - Gross unrealized losses	264	121
Available-for-sale, 12 months or more - Estimated fair value	13,879	5,733
Available-for-sale, Total - Gross unrealized losses	309	856
Available-for-sale, Total - Estimated fair value	38,561	108,634
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	0
Available-for-sale, Less than 12 months - Estimated fair value	0
Agency Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	87	2,176
Available-for-sale, Less than 12 months - Estimated fair value	23,856	559,196
Available-for-sale, 12 months or more - Gross unrealized losses	513	482
Available-for-sale, 12 months or more - Estimated fair value	125,850	131,615
Available-for-sale, Total - Gross unrealized losses	600	2,658
Available-for-sale, Total - Estimated fair value	149,706	690,811
Agency Guaranteed Mortgage-Backed Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	1,004	34,583
Available-for-sale, Less than 12 months - Estimated fair value	271,185	3,639,824
Available-for-sale, 12 months or more - Gross unrealized losses	3,823	1,454
Available-for-sale, 12 months or more - Estimated fair value	386,971	65,071
Available-for-sale, Total - Gross unrealized losses	4,827	36,037
Available-for-sale, Total - Estimated fair value	658,156	3,704,895
Small Business Administration Loan-Backed Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	4,256	5,348
Available-for-sale, Less than 12 months - Estimated fair value	582,167	567,365
Available-for-sale, 12 months or more - Gross unrealized losses	10,674	9,097
Available-for-sale, 12 months or more - Estimated fair value	552,261	535,376
Available-for-sale, Total - Gross unrealized losses	14,930	14,445
Available-for-sale, Total - Estimated fair value	1,134,428	1,102,741
Mutual Funds And Other [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	0	37
Available-for-sale, Less than 12 months - Estimated fair value	0	35,488
Available-for-sale, 12 months or more - Gross unrealized losses	0	0
Available-for-sale, 12 months or more - Estimated fair value	0	0
Available-for-sale, Total - Gross unrealized losses	0	37
Available-for-sale, Total - Estimated fair value	0	35,488
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	5,392	42,842
Available-for-sale, Less than 12 months - Estimated fair value	901,890	4,869,286
Available-for-sale, 12 months or more - Gross unrealized losses	19,261	13,819
Available-for-sale, 12 months or more - Estimated fair value	1,089,977	750,132
Available-for-sale, Total - Gross unrealized losses	24,653	56,661
Available-for-sale, Total - Estimated fair value	1,991,867	5,619,418
Available-for-sale Securities [Member] | Municipal Securities [Member]
Investment [Line Items]
Available-for-sale, 12 months or more - Gross unrealized losses	3,987
Available-for-sale, 12 months or more - Estimated fair value	11,016
Available-for-sale, Total - Gross unrealized losses	3,987	2,665
Available-for-sale, Total - Estimated fair value	$ 11,016	12,337
Asset-backed Securities [Member] | Other Credit Derivatives [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses		0
Available-for-sale, Less than 12 months - Estimated fair value		0
Available-for-sale, 12 months or more - Gross unrealized losses		2,665
Available-for-sale, 12 months or more - Estimated fair value		$ 12,337

Investment Securities (Rollforw

Investment Securities (Rollforward Of Total Amount Of Credit-Related OTTI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investment [Line Items]
Balance of credit-related OTTI at beginning of period	$ 0	$ (103,238)	$ 0	$ 104,551
Reductions for securities sold during the period	0	103,238	0	104,551
Balance of credit-related OTTI at end of period	0	0	0	0
Transfer of Securities from HTM to AFS	0	0	0	0
Held-to-maturity Securities [Member]
Investment [Line Items]
Balance of credit-related OTTI at beginning of period	0	0	0	9,079
Reductions for securities sold during the period	0	0	0	0
Balance of credit-related OTTI at end of period	0	0	0	0
Transfer of Securities from HTM to AFS	0	0	0	9,079
Available-for-sale Securities [Member]
Investment [Line Items]
Balance of credit-related OTTI at beginning of period	0	(103,238)	0	95,472
Reductions for securities sold during the period	0	103,238	0	104,551
Balance of credit-related OTTI at end of period	0	0	0	0
Transfer of Securities from HTM to AFS	$ 0	$ 0	$ 0	$ (9,079)

Investment Securities (Gains An

Investment Securities (Gains And Losses, Including OTTI, Recognized In Statement Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investments [Abstract]
Investment securities, Held-to-maturity, Gross gains	$ 0	$ 0	$ 0	$ 1
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities	0	0	0	0
Investment securities, Available-for-sale, Gross gains	30	7,402	60	8,360
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	5	146,315	7	147,513
Other noninterest-bearing investments, Nonmarketable equity securities, Gross gains	2,711	6,008	5,898	9,603
Other noninterest-bearing investments, Nonmarketable equity securities, Gross losses	2	692	3,739	934
Total investment securities and other noninterest-bearing investments, Gross gains	2,741	13,410	5,958	17,964
Total investment securities and other noninterest-bearing investments, Gross losses	7	147,007	3,746	148,447
Net losses	2,734	(133,597)	2,212	(130,483)
Equity securities gains	2,709	4,839	2,159	8,192
Fixed income securities gains (losses), net	$ 25	$ (138,436)	$ 53	$ (138,675)

Investment Securities Taxable a

Investment Securities Taxable and Nontaxable Interest Income by Investment Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Noninterest Income	$ 47,645	$ 28,809	$ 95,009	$ 56,282
Taxable [Member]
Noninterest Income	41,906	25,340	84,589	49,298
Nontaxable [Member]
Noninterest Income	5,739	3,469	10,420	6,984
Held-to-maturity Securities [Member]
Noninterest Income	5,730	5,867	11,060	12,321
Held-to-maturity Securities [Member] | Taxable [Member]
Noninterest Income	2,572	3,093	5,176	6,685
Held-to-maturity Securities [Member] | Nontaxable [Member]
Noninterest Income	3,158	2,774	5,884	5,636
Available-for-sale Securities [Member]
Noninterest Income	41,158	22,332	82,720	42,753
Available-for-sale Securities [Member] | Taxable [Member]
Noninterest Income	38,577	21,637	78,184	41,405
Available-for-sale Securities [Member] | Nontaxable [Member]
Noninterest Income	2,581	695	4,536	1,348
Trading Securities [Member]
Noninterest Income	757	610	1,229	1,208
Trading Securities [Member] | Taxable [Member]
Noninterest Income	757	610	1,229	1,208
Trading Securities [Member] | Nontaxable [Member]
Noninterest Income	$ 0	$ 0	$ 0	$ 0

Loans And Allowance For Credi45

Loans And Allowance For Credit Losses (Narrative) (Details)		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)moBilling_CyclesdPayments	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)	Jun. 30, 2015USD ($)
Loans And Allowance For Credit Losses [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance		$ 1,700,000		$ 1,700,000		$ 1,700,000
Unfunded Lending Commitments on Troubled Debt Restructuring		2,300,000		2,300,000		2,300,000	$ 7,500,000
Loans and Leases Receivable, Gross		42,501,575,000		42,501,575,000		42,501,575,000	40,649,542,000
Financing Receivable, Recorded Investment, Current		42,197,200,000		42,197,200,000		42,197,200,000	40,363,353,000
Threshold for Internal risk grades assigned to commercial and commercial real estate loans		750,000		750,000		750,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses		1,300,000	$ 300,000	900,000	$ (500,000)
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		19,112,000	2,186,000	21,239,000	3,145,000	161,600,000		$ 88,700,000
Unearned income and fees, net of related costs		149,700,000		149,700,000		149,700,000	150,300,000
Owner occupied and commercial real estate loans, unamortized premiums		23,000,000		23,000,000		23,000,000	26,200,000
Land Development Loans		280,500,000		280,500,000		280,500,000	288,000,000
Loans at carrying value pledged as collateral for current and potential borrowings		26,000,000,000		26,000,000,000		26,000,000,000	19,400,000,000
Payments for Origination and Purchases of Loans Held-for-sale		356,900,000	359,000,000	592,600,000	668,700,000
Principal Balance of Loans Sold, Serviced Loans				1,200,000,000			1,300,000,000
Loans and Leases Receivable, Gain (Loss) on Sales, Net		5,900,000	4,300,000	8,900,000	8,900,000
Principle amount of loans held for sale sold		317,500,000	335,800,000	590,700,000	636,200,000
Servicing Asset at Amortized Cost		0		$ 0		0	0
Number of days for consumer loans to be charged off | d				180
Number of days for closed-end loans to be charged off | d				120
Minimum number of days past due for nonaccrual status | d				90
Minimum number of monthly payments in arrears when reporting past due | Payments				2
Minimum number of billing cycles in arrears when reported as past due | Billing_Cycles				2
Minimum number of days unpaid when reported as past due | d				30
Threshold for nonaccrual loans for evaluation of impairment				$ 1,000,000
Minimum number of months for borrower to meet terms For TDR status | mo				6
Recorded investment in TDR loans modified with interest rates below market		167,400,000		$ 167,400,000		167,400,000	188,000,000
Total reversal amount to ALLL		100,000	1,100,000	500,000	2,500,000
Additional interest income due to increased cash flows from acquired loans		5,600,000	9,300,000	10,100,000	16,700,000
Provision for Loan and Lease Losses		34,492,000	566,000	76,637,000	(928,000)
Provision for Unfunded Lending Commitments		4,246,000	2,326,000	10,058,000	1,115,000
Other Real Estate, Foreclosed Assets, and Repossessed Assets		2,800,000		2,800,000		2,800,000	500,000
Other Real Estate, In Process of Forecloseing Assets		8,500,000		8,500,000		8,500,000	12,500,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		160,908,000		160,908,000		160,908,000	147,980,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		143,467,000		143,467,000		143,467,000	138,209,000
Financing Receivable, Recorded Investment, Past Due		304,375,000		304,375,000		304,375,000	286,189,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		28,994,000		28,994,000		28,994,000	32,024,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	390,973,000		390,973,000		390,973,000	217,427,000
Commercial [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		21,928,364,000		$ 21,928,364,000		21,928,364,000	21,479,014,000
Subsequent payment default period, number of days | d				90
Provision for Loan and Lease Losses		25,186,000	5,941,000	$ 71,061,000	30,875,000
Provision for Unfunded Lending Commitments		2,744,000	2,001,000	4,173,000	(1,843,000)
Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		9,255,278,000		$ 9,255,278,000		9,255,278,000	8,814,625,000
Subsequent payment default period, number of days | d				60
Provision for Loan and Lease Losses		(315,000)	(392,000)	$ (5,746,000)	67,000
Provision for Unfunded Lending Commitments		0	27,000	616,000	80,000
Financing Receivable, Recorded Investment, Nonaccrual Status		85,000		85,000		85,000	186,000
Consumer Loan [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		9,255,278,000		9,255,278,000		9,255,278,000	8,814,625,000
Financing Receivable, Recorded Investment, Current		9,201,479,000		9,201,479,000		9,201,479,000	8,750,302,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		27,602,000		27,602,000		27,602,000	30,646,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		26,197,000		26,197,000		26,197,000	33,677,000
Financing Receivable, Recorded Investment, Past Due		53,799,000		53,799,000		53,799,000	64,323,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,463,000		1,463,000		1,463,000	3,590,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	22,121,000		22,121,000		22,121,000	24,629,000
Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		189,046,000		189,046,000		189,046,000	187,149,000
Financing Receivable, Recorded Investment, Current		188,322,000		188,322,000		188,322,000	186,436,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		715,000		715,000		715,000	647,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		9,000		9,000		9,000	66,000
Financing Receivable, Recorded Investment, Past Due		724,000		724,000		724,000	713,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	52,000		52,000		52,000	83,000
Commercial and Industrial Sector [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		13,757,123,000		13,757,123,000		13,757,123,000	13,211,481,000
Financing Receivable, Recorded Investment, Current		13,622,079,000		13,622,079,000		13,622,079,000	13,114,045,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		73,002,000		73,002,000		73,002,000	60,523,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		62,042,000		62,042,000		62,042,000	36,913,000
Financing Receivable, Recorded Investment, Past Due		135,044,000		135,044,000		135,044,000	97,436,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		10,210,000		10,210,000		10,210,000	3,065,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	275,451,000		275,451,000		275,451,000	117,942,000
Finance Leases Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		426,449,000		426,449,000		426,449,000	441,666,000
Financing Receivable, Recorded Investment, Current		424,112,000		424,112,000		424,112,000	440,963,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		0	183,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		2,337,000		2,337,000		2,337,000	520,000
Financing Receivable, Recorded Investment, Past Due		2,337,000		2,337,000		2,337,000	703,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,826,000		1,826,000		1,826,000	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	13,403,000		13,403,000		13,403,000	3,309,000
Owner Occupied [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		6,988,647,000		6,988,647,000		6,988,647,000	7,150,028,000
Financing Receivable, Recorded Investment, Current		6,937,243,000		6,937,243,000		6,937,243,000	7,085,086,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,486,000		23,486,000		23,486,000	37,776,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		27,918,000		27,918,000		27,918,000	27,166,000
Financing Receivable, Recorded Investment, Past Due		51,404,000		51,404,000		51,404,000	64,942,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		4,241,000		4,241,000		4,241,000	3,626,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	39,773,000		39,773,000		39,773,000	43,984,000
Municipal [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		756,145,000		756,145,000		756,145,000	675,839,000
Financing Receivable, Recorded Investment, Current		756,145,000		756,145,000		756,145,000	668,207,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		0	7,586,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		0		0		0	46,000
Financing Receivable, Recorded Investment, Past Due		0		0		0	7,632,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0	46,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	893,000		893,000		893,000	951,000
Commercial Loan [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		21,928,364,000		21,928,364,000		21,928,364,000	21,479,014,000
Financing Receivable, Recorded Investment, Current		21,739,579,000		21,739,579,000		21,739,579,000	21,308,301,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		96,488,000		96,488,000		96,488,000	106,068,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		92,297,000		92,297,000		92,297,000	64,645,000
Financing Receivable, Recorded Investment, Past Due		188,785,000		188,785,000		188,785,000	170,713,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		16,277,000		16,277,000		16,277,000	6,737,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	329,520,000		329,520,000		329,520,000	166,186,000
Commercial Real Estate Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		2,088,250,000		2,088,250,000		2,088,250,000	1,841,502,000
Financing Receivable, Recorded Investment, Current		2,062,760,000		2,062,760,000		2,062,760,000	1,835,360,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,699,000		23,699,000		23,699,000	842,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,791,000		1,791,000		1,791,000	5,300,000
Financing Receivable, Recorded Investment, Past Due		25,490,000		25,490,000		25,490,000	6,142,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	2,558,000		2,558,000		2,558,000	1,745,000
Term [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		9,229,683,000		9,229,683,000		9,229,683,000	8,514,401,000
Financing Receivable, Recorded Investment, Current		9,193,382,000		9,193,382,000		9,193,382,000	8,469,390,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		13,119,000		13,119,000		13,119,000	10,424,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		23,182,000		23,182,000		23,182,000	34,587,000
Financing Receivable, Recorded Investment, Past Due		36,301,000		36,301,000		36,301,000	45,011,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		11,254,000		11,254,000		11,254,000	21,697,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	36,774,000		36,774,000		36,774,000	24,867,000
Commercial Real Estate [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		11,317,933,000		11,317,933,000		11,317,933,000	10,355,903,000
Financing Receivable, Recorded Investment, Current		11,256,142,000		11,256,142,000		11,256,142,000	10,304,750,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		36,818,000		36,818,000		36,818,000	11,266,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		24,973,000		24,973,000		24,973,000	39,887,000
Financing Receivable, Recorded Investment, Past Due		61,791,000		61,791,000		61,791,000	51,153,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		11,254,000		11,254,000		11,254,000	21,697,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	39,332,000		39,332,000		39,332,000	26,612,000
Home Equity Line of Credit [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		2,507,176,000		2,507,176,000		2,507,176,000	2,416,357,000
Financing Receivable, Recorded Investment, Current		2,495,556,000		2,495,556,000		2,495,556,000	2,407,972,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		6,230,000		6,230,000		6,230,000	4,717,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		5,390,000		5,390,000		5,390,000	3,668,000
Financing Receivable, Recorded Investment, Past Due		11,620,000		11,620,000		11,620,000	8,385,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	4,687,000		4,687,000		4,687,000	3,053,000
One Through Four Family Residential [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		5,680,050,000		5,680,050,000		5,680,050,000	5,382,099,000
Financing Receivable, Recorded Investment, Current		5,649,946,000		5,649,946,000		5,649,946,000	5,340,549,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,936,000		10,936,000		10,936,000	14,828,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		19,168,000		19,168,000		19,168,000	26,722,000
Financing Receivable, Recorded Investment, Past Due		30,104,000		30,104,000		30,104,000	41,550,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		288,000		288,000		288,000	1,036,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	15,742,000		15,742,000		15,742,000	20,939,000
Construction And Other Consumer Real Estate [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		419,299,000		419,299,000		419,299,000	385,240,000
Financing Receivable, Recorded Investment, Current		411,212,000		411,212,000		411,212,000	374,987,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		7,504,000		7,504,000		7,504,000	8,593,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		583,000		583,000		583,000	1,660,000
Financing Receivable, Recorded Investment, Past Due		8,087,000		8,087,000		8,087,000	10,253,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		314,000		314,000		314,000	1,337,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	308,000		308,000		308,000	408,000
Revolving Credit Facility [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		459,707,000		459,707,000		459,707,000	443,780,000
Financing Receivable, Recorded Investment, Current		456,443,000		456,443,000		456,443,000	440,358,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,217,000		2,217,000		2,217,000	1,861,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,047,000		1,047,000		1,047,000	1,561,000
Financing Receivable, Recorded Investment, Past Due		3,264,000		3,264,000		3,264,000	3,422,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		861,000		861,000		861,000	1,217,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,332,000		1,332,000		1,332,000	146,000
Accruing [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		171,854,000		171,854,000		171,854,000	194,084,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		124,000		124,000		124,000	0
Nonaccruing [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		315,233,000		315,233,000		315,233,000	297,088,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		19,112,000	$ 2,186,000	21,239,000	$ 3,145,000
Nonaccruing [Member] | Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 13,520,000		$ 13,520,000		$ 13,520,000	$ 13,346,000
[1]	1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.

Loans And Allowance For Credi46

Loans And Allowance For Credit Losses (Summary Of Major Portfolio Segment And Specific Loan Class) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	$ 1,300	$ 300	$ 900	$ (500)
Balance at end of period	608,345	609,375	608,345	609,375
Loans held for sale	146,512		146,512			$ 149,880
Commercial and industrial	13,757,123		13,757,123			13,211,481
Leasing	426,449		426,449			441,666
Owner occupied	6,988,647		6,988,647			7,150,028
Municipal	756,145		756,145			675,839
Construction and land development	2,088,250		2,088,250			1,841,502
Term	9,229,683		9,229,683			8,514,401
Provision for loan losses	(34,492)	(566)	(76,637)	928
Change In Allowance Covered By F D I C Indemnification		(38)		0
Allowance for Loan and Lease Losses, Write-offs	(57,629)	(31,048)	(105,739)	(51,236)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	19,588	19,806	31,399	56,876
Net loan and lease charge-offs	(38,041)	(11,242)	(74,340)	5,640
Reserve for unfunded lending commitments	64,780	79,961	64,780	79,961	$ 69,026	74,838	$ 82,287	$ 81,076
Provision for Unfunded Lending Commitments	4,246	2,326	10,058	1,115
Total allowance for credit losses	673,125	$ 689,336	673,125	$ 689,336
Loans Receivable, Gross, Commercial, Real Estate	11,317,933		11,317,933			10,355,903
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,507,176		2,507,176			2,416,357
Loans and Leases Receivable, Gross, Consumer, Mortgage	5,680,050		5,680,050			5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction	419,299		419,299			385,240
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	459,707		459,707			443,780
Loans and Leases Receivable, Gross, Consumer, Other	189,046		189,046			187,149
Loans and Leases Receivable, Gross	42,501,575		42,501,575			40,649,542
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross	21,928,364		21,928,364			21,479,014
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross	$ 9,255,278		$ 9,255,278			$ 8,814,625

Loans And Allowance For Credi47

Loans And Allowance For Credit Losses (Summary Of Changes In The Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	$ (34,492)	$ (566)	$ (76,637)	$ 928
Change In Allowance Covered By F D I C Indemnification		38		0
Allowance for Loan and Lease Losses, Write-offs	(57,629)	(31,048)	(105,739)	(51,236)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	611,894	620,013	606,048	604,663
Net loan and lease charge-offs	(38,041)	(11,242)	(74,340)	5,640
Balance at end of period	64,780	79,961	64,780	79,961
Allowance for loan losses	611,894	620,013	606,048	604,663	$ 608,345	$ 611,894	$ 606,048	$ 609,375	$ 620,013	$ 604,663
Reserve for unfunded lending commitments	64,780	79,961	64,780	79,961	64,780	69,026	74,838	79,961	82,287	81,076
Total allowance for credit losses					673,125			689,336
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	19,588	19,806	31,399	56,876
Provision for Unfunded Lending Commitments	(4,246)	(2,326)	(10,058)	(1,115)
Balance at end of period	608,345	609,375	608,345	609,375
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(25,186)	(5,941)	(71,061)	(30,875)
Change In Allowance Covered By F D I C Indemnification		(19)		(57)
Allowance for Loan and Lease Losses, Write-offs	(46,635)	(23,822)	(89,865)	(39,773)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	463,987	442,072	454,277	412,514
Net loan and lease charge-offs	(32,109)	(10,224)	(68,274)	(5,562)
Balance at end of period	53,523	60,774	53,523	60,774
Allowance for loan losses	463,987	442,072	454,277	412,514	457,064	463,987	454,277	437,770	442,072	412,514
Reserve for unfunded lending commitments	53,523	60,774	53,523	60,774	53,523	56,267	57,696	60,774	62,775	58,931
Total allowance for credit losses					510,587			498,544
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	14,526	13,598	21,591	34,211
Provision for Unfunded Lending Commitments	(2,744)	(2,001)	(4,173)	1,843
Balance at end of period	457,064	437,770	457,064	437,770
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(9,621)	4,983	(11,322)	31,870
Change In Allowance Covered By F D I C Indemnification		57		57
Allowance for Loan and Lease Losses, Write-offs	(7,839)	(3,943)	(8,814)	(4,569)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	117,712	131,615	113,992	145,009
Net loan and lease charge-offs	(5,766)	(893)	(3,747)	12,600
Balance at end of period	11,257	18,639	11,257	18,639
Allowance for loan losses	117,712	131,615	113,992	145,009	121,567	117,712	113,992	125,796	131,615	145,009
Reserve for unfunded lending commitments	11,257	18,639	11,257	18,639	11,257	12,759	16,526	18,639	18,937	21,517
Total allowance for credit losses					132,824			144,435
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	2,073	3,050	5,067	17,169
Provision for Unfunded Lending Commitments	(1,502)	(298)	(5,269)	(2,878)
Balance at end of period	121,567	125,796	121,567	125,796
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	315	392	5,746	(67)
Change In Allowance Covered By F D I C Indemnification		0		0
Allowance for Loan and Lease Losses, Write-offs	(3,155)	(3,283)	(7,060)	(6,894)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	30,195	46,326	37,779	47,140
Net loan and lease charge-offs	(166)	(125)	(2,319)	(1,398)
Balance at end of period	0	548	0	548
Allowance for loan losses	30,195	46,326	37,779	47,140	29,714	30,195	37,779	45,809	46,326	47,140
Reserve for unfunded lending commitments	0	548	0	548	0	$ 0	$ 616	548	$ 575	$ 628
Total allowance for credit losses					$ 29,714			$ 46,357
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	2,989	3,158	4,741	5,496
Provision for Unfunded Lending Commitments	0	(27)	(616)	(80)
Balance at end of period	$ 29,714	$ 45,809	$ 29,714	$ 45,809

Loans And Allowance For Credi48

Loans And Allowance For Credit Losses (Summary Of ALLL And Outstanding Loan Balances According To The Company's Impairment Method) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 742,644	$ 602,095	$ 629,879	$ 578,481
Impaired Financing Receivable, Interest Income, Accrual Method	9,477	13,911	18,092	25,982
Allowance for loan losses: Individually evaluated for impairment	(64,088)		(64,088)			$ (49,525)
Allowance for loan losses: Collectively evaluated for impairment	542,737		542,737			555,578
Allowance for loan losses: Purchased loans with evidence of credit deterioration	1,520		1,520			945
Allowance for loan losses: Total	608,345	609,375	608,345	609,375	$ 611,894	606,048	$ 620,013	$ 604,663
Outstanding loan balances: Individually evaluated for impairment	633,363		633,363			489,575
Outstanding loan balances: Collectively evaluated for impairment	41,770,829		41,770,829			40,035,044
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	97,383		97,383			124,923
Total loans	42,501,575		42,501,575			40,649,542
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	429,681	174,911	317,211	155,584
Impaired Financing Receivable, Interest Income, Accrual Method	1,176	2,831	2,505	4,255
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	111,165	144,613	113,198	142,817
Impaired Financing Receivable, Interest Income, Accrual Method	3,131	3,186	5,557	6,970
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Individually evaluated for impairment	(53,644)		(53,644)			(36,909)
Allowance for loan losses: Collectively evaluated for impairment	402,559		402,559			417,295
Allowance for loan losses: Purchased loans with evidence of credit deterioration	861		861			73
Allowance for loan losses: Total	457,064	437,770	457,064	437,770	463,987	454,277	442,072	412,514
Outstanding loan balances: Individually evaluated for impairment	452,250		452,250			289,629
Outstanding loan balances: Collectively evaluated for impairment	21,432,102		21,432,102			21,129,125
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	44,012		44,012			60,260
Total loans	21,928,364		21,928,364			21,479,014
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	11,658	35,562	11,922	36,215
Impaired Financing Receivable, Interest Income, Accrual Method	695	1,628	1,202	2,177
Allowance for loan losses: Total	121,567	125,796	121,567	125,796	117,712	113,992	131,615	145,009
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	2,086	4,176	2,294	4,463
Impaired Financing Receivable, Interest Income, Accrual Method	92	230	200	516
Allowance for loan losses: Individually evaluated for impairment	(6,796)		(6,796)			(9,462)
Allowance for loan losses: Collectively evaluated for impairment	22,890		22,890			27,866
Allowance for loan losses: Purchased loans with evidence of credit deterioration	28		28			451
Allowance for loan losses: Total	29,714	45,809	29,714	45,809	$ 30,195	37,779	$ 46,326	$ 47,140
Outstanding loan balances: Individually evaluated for impairment	78,307		78,307			92,605
Outstanding loan balances: Collectively evaluated for impairment	9,168,216		9,168,216			8,712,079
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	8,755		8,755			9,941
Total loans	9,255,278		9,255,278			8,814,625
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	541,747	320,532	431,325	299,422
Impaired Financing Receivable, Interest Income, Accrual Method	4,307	6,017	8,062	11,225
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	98,234	144,054	96,925	142,439
Impaired Financing Receivable, Interest Income, Accrual Method	3,512	5,063	6,871	10,038
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	109,892	179,616	108,847	178,654
Impaired Financing Receivable, Interest Income, Accrual Method	4,207	6,691	8,073	12,215
Allowance for loan losses: Individually evaluated for impairment	(3,648)		(3,648)			(3,154)
Allowance for loan losses: Collectively evaluated for impairment	117,288		117,288			110,417
Allowance for loan losses: Purchased loans with evidence of credit deterioration	631		631			421
Allowance for loan losses: Total	121,567		121,567			113,992
Outstanding loan balances: Individually evaluated for impairment	102,806		102,806			107,341
Outstanding loan balances: Collectively evaluated for impairment	11,170,511		11,170,511			10,193,840
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	44,616		44,616			54,722
Total loans	11,317,933		11,317,933			$ 10,355,903
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	24,609	25,400	24,227	24,948
Impaired Financing Receivable, Interest Income, Accrual Method	367	416	744	821
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	61,481	69,874	60,372	68,464
Impaired Financing Receivable, Interest Income, Accrual Method	455	534	901	1,041
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	2,829	2,497	2,814	2,529
Impaired Financing Receivable, Interest Income, Accrual Method	48	22	95	64
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	0	0	0	1
Impaired Financing Receivable, Interest Income, Accrual Method	1	1	17	100
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	91,005	101,947	89,707	100,405
Impaired Financing Receivable, Interest Income, Accrual Method	963	1,203	1,957	2,542
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	901	1,008	916	1,021
Impaired Financing Receivable, Interest Income, Accrual Method	$ 0	$ 0	$ 0	$ 0

Loans And Allowance For Credi49

Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	[1]	$ 390,973	$ 217,427
loans held for sale [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		13,570	0
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		4,610	7,045
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		85	186
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		340,883	163,906
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		13,914	3,829
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		69,646	73,881
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		893	951
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		425,336	242,567
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		51,209	40,253
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		55,819	47,298
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		11,698	8,270
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		38,600	50,254
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		627	748
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		1,667	537
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		52,677	59,995
Financing Receivables, Total [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		$ 533,832	$ 349,860
[1]	1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.

Loans And Allowance For Credi50

Loans And Allowance For Credit Losses (Summary Of Past Due Loans (Accruing And Nonaccruing)) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 19,112	$ 2,186	$ 21,239	$ 3,145	$ 161,600	$ 88,700
Financing Receivable, Recorded Investment, Current		42,197,200		42,197,200		42,197,200		$ 40,363,353
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		160,908		160,908		160,908		147,980
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		143,467		143,467		143,467		138,209
Total past due		304,375		304,375		304,375		286,189
Total loans		42,501,575		42,501,575		42,501,575		40,649,542
Accruing loans 90+ days past due		28,994		28,994		28,994		32,024
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	390,973		390,973		390,973		217,427
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		15,306	135	17,433	135
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		21,928,364		21,928,364		21,928,364		21,479,014
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		18,794	1,233	20,921	2,192
Financing Receivable, Recorded Investment, Nonaccrual Status		425,336		425,336		425,336		242,567
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status		4,610		4,610		4,610		7,045
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		9,255,278		9,255,278		9,255,278		8,814,625
Financing Receivable, Recorded Investment, Nonaccrual Status		85		85		85		186
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
Financing Receivable, Recorded Investment, Nonaccrual Status		52,677		52,677		52,677		59,995
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		340,883		340,883		340,883		163,906
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		13,914		13,914		13,914		3,829
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,488	1,098	3,488	2,057
Financing Receivable, Recorded Investment, Nonaccrual Status		69,646		69,646		69,646		73,881
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		893		893		893		951
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Financing Receivable, Recorded Investment, Nonaccrual Status		51,209		51,209		51,209		40,253
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Total loans		11,317,933		11,317,933		11,317,933		10,355,903
Financing Receivable, Recorded Investment, Nonaccrual Status		55,819		55,819		55,819		47,298
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status		11,698		11,698		11,698		8,270
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
Financing Receivable, Recorded Investment, Nonaccrual Status		38,600		38,600		38,600		50,254
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status		627		627		627		748
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		1,667		1,667		$ 1,667		$ 537
Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Accruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		19,112	2,186	21,239	3,145
Nonaccruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		15,306	135	17,433	135
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		18,794	1,233	20,921	2,192
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,488	1,098	3,488	2,057
Nonaccruing [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Nonaccruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 0	$ 0	$ 0	$ 0
[1]	1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.

Loans And Allowance For Credi51

Loans And Allowance For Credit Losses (Summary Of Outstanding Loan Balances (Accruing And Nonaccruing) Categorized By Credit Quality Indicators) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 19,112	$ 2,186	$ 21,239	$ 3,145	$ 161,600	$ 88,700
Financing Receivable, Recorded Investment, Current		42,197,200		42,197,200		42,197,200		$ 40,363,353
Loans held for sale		146,512		146,512		146,512		149,880
Commercial and industrial		13,757,123		13,757,123		13,757,123		13,211,481
Leasing		426,449		426,449		426,449		441,666
Owner occupied		6,988,647		6,988,647		6,988,647		7,150,028
Municipal		756,145		756,145		756,145		675,839
Construction and land development		2,088,250		2,088,250		2,088,250		1,841,502
Term		9,229,683		9,229,683		9,229,683		8,514,401
Loans Receivable, Gross, Commercial, Real Estate		11,317,933		11,317,933		11,317,933		10,355,903
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,507,176		2,507,176		2,507,176		2,416,357
1-4 family residential		5,680,050		5,680,050		5,680,050		5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction		419,299		419,299		419,299		385,240
Bankcard and other revolving plans		459,707		459,707		459,707		443,780
Other		189,046		189,046		189,046		187,149
Total loans		42,501,575		42,501,575		42,501,575		40,649,542
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		160,908		160,908		160,908		147,980
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		143,467		143,467		143,467		138,209
Financing Receivable, Recorded Investment, Past Due		304,375		304,375		304,375		286,189
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		28,994		28,994		28,994		32,024
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	390,973		390,973		390,973		217,427
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		9,255,278		9,255,278		9,255,278		8,814,625
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,507,176		2,507,176		2,507,176		2,416,357
1-4 family residential		5,680,050		5,680,050		5,680,050		5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction		419,299		419,299		419,299		385,240
Bankcard and other revolving plans		459,707		459,707		459,707		443,780
Other		189,046		189,046		189,046		187,149
Total loans		9,255,278		9,255,278		9,255,278		8,814,625
Financing Receivable, Recorded Investment, Nonaccrual Status		85		85		85		186
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	$ 0	0	$ 0
Construction and land development		2,088,250		2,088,250		2,088,250		1,841,502
Term		9,229,683		9,229,683		9,229,683		8,514,401
Loans Receivable, Gross, Commercial, Real Estate		11,317,933		11,317,933		11,317,933		10,355,903
Financing Receivable, Recorded Investment, Nonaccrual Status		4,610		4,610		4,610		7,045
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		13,757,123		13,757,123		13,757,123		13,211,481
Leasing		426,449		426,449		426,449		441,666
Owner occupied		6,988,647		6,988,647		6,988,647		7,150,028
Municipal		756,145		756,145		756,145		675,839
Loans and Leases Receivable before Fees, Gross		21,928,364		21,928,364		21,928,364		21,479,014
Total loans		21,928,364		21,928,364		21,928,364		21,479,014
Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		40,307,172		40,307,172		40,307,172		38,647,130
Pass [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		9,192,012		9,192,012		9,192,012		8,739,010
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,493,134		2,493,134		2,493,134		2,404,635
1-4 family residential		5,636,600		5,636,600		5,636,600		5,325,519
Loans and Leases Receivable, Gross, Consumer, Construction		417,723		417,723		417,723		381,738
Bankcard and other revolving plans		455,721		455,721		455,721		440,282
Other		188,834		188,834		188,834		186,836
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		2,015,546		2,015,546		2,015,546		1,786,610
Term		9,020,963		9,020,963		9,020,963		8,319,348
Loans Receivable, Gross, Commercial, Real Estate		11,036,509		11,036,509		11,036,509		10,105,958
Pass [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		12,393,067		12,393,067		12,393,067		12,007,076
Leasing		394,633		394,633		394,633		411,131
Owner occupied		6,549,125		6,549,125		6,549,125		6,720,052
Municipal		741,826		741,826		741,826		663,903
Loans and Leases Receivable before Fees, Gross		20,078,651		20,078,651		20,078,651		19,802,162
Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		584,140		584,140		584,140		634,390
Special Mention [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		0		0		0		0
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		0		0
1-4 family residential		0		0		0		0
Loans and Leases Receivable, Gross, Consumer, Construction		0		0		0		0
Bankcard and other revolving plans		0		0		0		0
Other		0		0		0		0
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		64,383		64,383		64,383		42,348
Term		51,872		51,872		51,872		47,245
Loans Receivable, Gross, Commercial, Real Estate		116,255		116,255		116,255		89,593
Special Mention [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		316,850		316,850		316,850		399,847
Leasing		1,601		1,601		1,601		5,166
Owner occupied		149,434		149,434		149,434		139,784
Municipal		0		0		0		0
Loans and Leases Receivable before Fees, Gross		467,885		467,885		467,885		544,797
Total Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		608,345		608,345		608,345		606,048
Total Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		29,714		29,714		29,714		37,779
Total Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		121,567		121,567		121,567		113,992
Total Allowance [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		457,064		457,064		457,064		454,277
Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		0		0		0		8,927
Doubtful [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		0		0		0		0
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		0		0
1-4 family residential		0		0		0		0
Loans and Leases Receivable, Gross, Consumer, Construction		0		0		0		0
Bankcard and other revolving plans		0		0		0		0
Other		0		0		0		0
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		0		0		0		0
Term		0		0		0		8,772
Loans Receivable, Gross, Commercial, Real Estate		0		0		0		8,772
Doubtful [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		0		0		0		155
Leasing		0		0		0		0
Owner occupied		0		0		0		0
Municipal		0		0		0		0
Loans and Leases Receivable before Fees, Gross		0		0		0		155
Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		1,610,263		1,610,263		1,610,263		1,359,095
Substandard [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable before Fees, Gross		63,266		63,266		63,266		75,615
Loans and Leases Receivable, Gross, Consumer, Home Equity		14,042		14,042		14,042		11,722
1-4 family residential		43,450		43,450		43,450		56,580
Loans and Leases Receivable, Gross, Consumer, Construction		1,576		1,576		1,576		3,502
Bankcard and other revolving plans		3,986		3,986		3,986		3,498
Other		212		212		212		313
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		8,321		8,321		8,321		12,544
Term		156,848		156,848		156,848		139,036
Loans Receivable, Gross, Commercial, Real Estate		165,169		165,169		165,169		151,580
Substandard [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		1,047,206		1,047,206		1,047,206		804,403
Leasing		30,215		30,215		30,215		25,369
Owner occupied		290,088		290,088		290,088		290,192
Municipal		14,319		14,319		14,319		11,936
Loans and Leases Receivable before Fees, Gross		1,381,828		1,381,828		1,381,828		1,131,900
loans held for sale [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		132,942		132,942		132,942
Total loans		146,512		146,512		146,512
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		0
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		13,570		13,570		13,570
Financing Receivable, Recorded Investment, Past Due		13,570		13,570		13,570
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	0		0		0
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		9,201,479		9,201,479		9,201,479		8,750,302
Total loans		9,255,278		9,255,278		9,255,278		8,814,625
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		27,602		27,602		27,602		30,646
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		26,197		26,197		26,197		33,677
Financing Receivable, Recorded Investment, Past Due		53,799		53,799		53,799		64,323
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,463		1,463		1,463		3,590
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	22,121		22,121		22,121		24,629
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		188,322		188,322		188,322		186,436
Total loans		189,046		189,046		189,046		187,149
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		715		715		715		647
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		9		9		9		66
Financing Receivable, Recorded Investment, Past Due		724		724		724		713
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	52		52		52		83
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		9,193,382		9,193,382		9,193,382		8,469,390
Total loans		9,229,683		9,229,683		9,229,683		8,514,401
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		13,119		13,119		13,119		10,424
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		23,182		23,182		23,182		34,587
Financing Receivable, Recorded Investment, Past Due		36,301		36,301		36,301		45,011
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		11,254		11,254		11,254		21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	36,774		36,774		36,774		24,867
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		2,062,760		2,062,760		2,062,760		1,835,360
Total loans		2,088,250		2,088,250		2,088,250		1,841,502
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,699		23,699		23,699		842
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,791		1,791		1,791		5,300
Financing Receivable, Recorded Investment, Past Due		25,490		25,490		25,490		6,142
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	2,558		2,558		2,558		1,745
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		13,622,079		13,622,079		13,622,079		13,114,045
Total loans		13,757,123		13,757,123		13,757,123		13,211,481
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		73,002		73,002		73,002		60,523
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		62,042		62,042		62,042		36,913
Financing Receivable, Recorded Investment, Past Due		135,044		135,044		135,044		97,436
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		10,210		10,210		10,210		3,065
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	275,451		275,451		275,451		117,942
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		424,112		424,112		424,112		440,963
Total loans		426,449		426,449		426,449		441,666
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		0		183
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		2,337		2,337		2,337		520
Financing Receivable, Recorded Investment, Past Due		2,337		2,337		2,337		703
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,826		1,826		1,826		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	13,403		13,403		13,403		3,309
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		6,937,243		6,937,243		6,937,243		7,085,086
Total loans		6,988,647		6,988,647		6,988,647		7,150,028
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,486		23,486		23,486		37,776
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		27,918		27,918		27,918		27,166
Financing Receivable, Recorded Investment, Past Due		51,404		51,404		51,404		64,942
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		4,241		4,241		4,241		3,626
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	39,773		39,773		39,773		43,984
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		756,145		756,145		756,145		668,207
Total loans		756,145		756,145		756,145		675,839
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		0		7,586
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		0		0		0		46
Financing Receivable, Recorded Investment, Past Due		0		0		0		7,632
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0		46
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	893		893		893		951
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		11,256,142		11,256,142		11,256,142		10,304,750
Total loans		11,317,933		11,317,933		11,317,933		10,355,903
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		36,818		36,818		36,818		11,266
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		24,973		24,973		24,973		39,887
Financing Receivable, Recorded Investment, Past Due		61,791		61,791		61,791		51,153
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		11,254		11,254		11,254		21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	39,332		39,332		39,332		26,612
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		2,495,556		2,495,556		2,495,556		2,407,972
Total loans		2,507,176		2,507,176		2,507,176		2,416,357
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		6,230		6,230		6,230		4,717
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		5,390		5,390		5,390		3,668
Financing Receivable, Recorded Investment, Past Due		11,620		11,620		11,620		8,385
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	4,687		4,687		4,687		3,053
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		21,739,579		21,739,579		21,739,579		21,308,301
Total loans		21,928,364		21,928,364		21,928,364		21,479,014
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		96,488		96,488		96,488		106,068
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		92,297		92,297		92,297		64,645
Financing Receivable, Recorded Investment, Past Due		188,785		188,785		188,785		170,713
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		16,277		16,277		16,277		6,737
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	329,520		329,520		329,520		166,186
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		5,649,946		5,649,946		5,649,946		5,340,549
Total loans		5,680,050		5,680,050		5,680,050		5,382,099
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,936		10,936		10,936		14,828
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		19,168		19,168		19,168		26,722
Financing Receivable, Recorded Investment, Past Due		30,104		30,104		30,104		41,550
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		288		288		288		1,036
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	15,742		15,742		15,742		20,939
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		411,212		411,212		411,212		374,987
Total loans		419,299		419,299		419,299		385,240
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		7,504		7,504		7,504		8,593
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		583		583		583		1,660
Financing Receivable, Recorded Investment, Past Due		8,087		8,087		8,087		10,253
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		314		314		314		1,337
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	$ 308		$ 308		$ 308		$ 408
[1]	1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.

Loans And Allowance For Credi52

Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	$ 2,507,176		$ 2,507,176		$ 2,416,357
Unpaid principal balance	778,480		778,480		687,148
Recorded investment	687,844		687,844		566,599
Impaired Financing Receivable, Related Allowance	62,561		62,561		48,697
Average recorded investment	742,644	$ 602,095	629,879	$ 578,481
Interest income recognized	9,477	13,911	18,092	25,982
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	422,844		422,844		272,161
Recorded investment	375,381		375,381		207,919
Impaired Financing Receivable, Related Allowance	49,385		49,385		30,538
Average recorded investment	429,681	174,911	317,211	155,584
Interest income recognized	1,176	2,831	2,505	4,255
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	117,779		117,779		141,526
Recorded investment	107,797		107,797		126,267
Impaired Financing Receivable, Related Allowance	4,166		4,166		5,486
Average recorded investment	111,165	144,613	113,198	142,817
Interest income recognized	3,131	3,186	5,557	6,970
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	1,372		1,372		1,430
Recorded investment	893		893		951
Impaired Financing Receivable, Related Allowance	0		0		0
Average recorded investment	901	1,008	916	1,021
Interest income recognized	0	0	0	0
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	541,995		541,995		415,117
Recorded investment	484,071		484,071		335,137
Impaired Financing Receivable, Related Allowance	53,551		53,551		36,024
Average recorded investment	541,747	320,532	431,325	299,422
Interest income recognized	4,307	6,017	8,062	11,225
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	18,714		18,714		22,791
Recorded investment	11,307		11,307		14,634
Impaired Financing Receivable, Related Allowance	746		746		618
Average recorded investment	11,658	35,562	11,922	36,215
Interest income recognized	695	1,628	1,202	2,177
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	125,446		125,446		142,239
Recorded investment	106,807		106,807		117,225
Impaired Financing Receivable, Related Allowance	1,545		1,545		2,604
Average recorded investment	98,234	144,054	96,925	142,439
Interest income recognized	3,512	5,063	6,871	10,038
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	144,160		144,160		165,030
Recorded investment	118,114		118,114		131,859
Impaired Financing Receivable, Related Allowance	2,291		2,291		3,222
Average recorded investment	109,892	179,616	108,847	178,654
Interest income recognized	4,207	6,691	8,073	12,215
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	27,658		27,658		27,064
Recorded investment	24,971		24,971		24,299
Impaired Financing Receivable, Related Allowance	206		206		243
Average recorded investment	24,609	25,400	24,227	24,948
Interest income recognized	367	416	744	821
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,507,176		2,507,176		2,416,357
Unpaid principal balance	2,307		2,307		3,187
Recorded investment	1,758		1,758		2,606
Impaired Financing Receivable, Related Allowance	17		17		299
Average recorded investment	2,086	4,176	2,294	4,463
Interest income recognized	92	230	200	516
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	58,960		58,960		74,009
Recorded investment	56,114		56,114		70,695
Impaired Financing Receivable, Related Allowance	6,393		6,393		8,736
Average recorded investment	61,481	69,874	60,372	68,464
Interest income recognized	455	534	901	1,041
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	3,400		3,400		2,741
Recorded investment	2,816		2,816		2,003
Impaired Financing Receivable, Related Allowance	103		103		173
Average recorded investment	2,829	2,497	2,814	2,529
Interest income recognized	48	22	95	64
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Average recorded investment	0	0	0	1
Interest income recognized	1	1	17	100
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	92,325		92,325		107,001
Recorded investment	85,659		85,659		99,603
Impaired Financing Receivable, Related Allowance	6,719		6,719		9,451
Average recorded investment	91,005	101,947	89,707	100,405
Interest income recognized	963	$ 1,203	1,957	$ 2,542
Impaired Financing Receivable Related Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	402,901		402,901		300,949
Impaired Financing Receivable Related Allowance [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	293,498		293,498		163,729
Impaired Financing Receivable Related Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	41,654		41,654		43,243
Impaired Financing Receivable Related Allowance [Member] | Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	0		0		0
Impaired Financing Receivable Related Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	335,152		335,152		206,972
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	8,155		8,155		9,558
Impaired Financing Receivable Related Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	22,277		22,277		34,361
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	30,432		30,432		43,919
Impaired Financing Receivable Related Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	4,175		4,175		5,319
Impaired Financing Receivable Related Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	1,598		1,598		2,570
Impaired Financing Receivable Related Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	29,691		29,691		41,155
Impaired Financing Receivable Related Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	1,853		1,853		1,014
Impaired Financing Receivable Related Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	37,317		37,317		50,058
Impaired Financing Receivable Recorded Investment With No Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	284,943		284,943		265,650
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	81,883		81,883		44,190
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	66,143		66,143		83,024
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	893		893		951
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	148,919		148,919		128,165
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	3,152		3,152		5,076
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	84,530		84,530		82,864
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	87,682		87,682		87,940
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	20,796		20,796		18,980
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	160		160		36
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	26,423		26,423		29,540
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	963		963		989
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	$ 48,342		$ 48,342		$ 49,545

Loans And Allowance For Credi53

Loans And Allowance For Credit Losses (Summary Of Selected Information On TDRs That Includes Recorded Investment On An Accruing And Nonaccruing Basis By Loan Class And Modification Type) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 19,112	$ 2,186	$ 21,239	$ 3,145	$ 161,600	$ 88,700
1-4 family residential		5,680,050		5,680,050		5,680,050		$ 5,382,099
Construction and other consumer real estate		419,299		419,299		419,299		385,240
Commercial and industrial		13,757,123		13,757,123		13,757,123		13,211,481
Home equity credit line		2,507,176		2,507,176		2,507,176		2,416,357
Bankcard and other revolving plans		459,707		459,707		459,707		443,780
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		15,306	135	17,433	135
Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,488	1,098	3,488	2,057
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		18,794	1,233	20,921	2,192
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		5,680,050		5,680,050		5,680,050		5,382,099
Construction and other consumer real estate		419,299		419,299		419,299		385,240
Home equity credit line		2,507,176		2,507,176		2,507,176		2,416,357
Bankcard and other revolving plans		459,707		459,707		459,707		443,780
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		171,854		171,854		171,854		194,084
Accruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Commercial and industrial		52,992		52,992		52,992		61,231
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		28,908		28,908		28,908		29,827
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		81,900		81,900		81,900		91,058
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		8,188		8,188		8,188		9,792
Accruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		21,594		21,594		21,594		29,558
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		29,782		29,782		29,782		39,350
Accruing [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		15,333		15,333		15,333		15,421
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
1-4 family residential		42,108		42,108		42,108		46,545
Accruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Construction and other consumer real estate		2,607		2,607		2,607		1,710
Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		124		124		124		0
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		60,172		60,172		60,172		63,676
Accruing [Member] | Interest Rate Below Market [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		9,496		9,496		9,496		10,026
Accruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		293		293		293		202
Accruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,181		2,181		2,181		1,999
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,474		2,474		2,474		2,201
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		42		42		42		94
Accruing [Member] | Interest Rate Below Market [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,606		4,606		4,606		4,696
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,648		4,648		4,648		4,790
Accruing [Member] | Interest Rate Below Market [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		197		197		197		192
Accruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		2,009		2,009		2,009		2,669
Accruing [Member] | Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		168		168		168		174
Accruing [Member] | Interest Rate Below Market [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Interest Rate Below Market [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,374		2,374		2,374		3,035
Accruing [Member] | Maturity Or Team Extension [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		17,923		17,923		17,923		7,439
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		13,341		13,341		13,341		3,236
Accruing [Member] | Maturity Or Team Extension [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,106		1,106		1,106		681
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		14,447		14,447		14,447		3,917
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Maturity Or Team Extension [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		467		467		467		638
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		467		467		467		638
Accruing [Member] | Maturity Or Team Extension [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		2,315		2,315		2,315		2,147
Accruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		344		344		344		353
Accruing [Member] | Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		350		350		350		384
Accruing [Member] | Maturity Or Team Extension [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Maturity Or Team Extension [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,009		3,009		3,009		2,884
Accruing [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		16,899		16,899		16,899		17,618
Accruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		11		11		11		13
Accruing [Member] | Principal Forgiveness [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		909		909		909		929
Accruing [Member] | Principal Forgiveness [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		920		920		920		942
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Principal Forgiveness [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		158		158		158		166
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		158		158		158		166
Accruing [Member] | Principal Forgiveness [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		9,955		9,955		9,955		9,763
Accruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		5,727		5,727		5,727		6,747
Accruing [Member] | Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		15		15		15		0
Accruing [Member] | Principal Forgiveness [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		124		124		124		0
Accruing [Member] | Principal Forgiveness [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		15,821		15,821		15,821		16,510
Accruing [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,456		2,456		2,456		1,509
Accruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		80		80		80		100
Accruing [Member] | Payment Deferral [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Payment Deferral [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		80		80		80		100
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Payment Deferral [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		978		978		978		976
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		978		978		978		976
Accruing [Member] | Payment Deferral [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		0		0		0		0
Accruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		256		256		256		433
Accruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		1,142		1,142		1,142		0
Accruing [Member] | Payment Deferral [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Accruing [Member] | Payment Deferral [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,398		1,398		1,398		433
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	13,785		13,785		13,785		38,939
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[1]	854		854		854		23,207
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	7,793		7,793		7,793		9,879
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	8,647		8,647		8,647		33,086
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	0		0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	1,794		1,794		1,794		2,249
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	1,794		1,794		1,794		2,249
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[1]	164		164		164		164
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[1]	3,180		3,180		3,180		3,440
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate	[1]	0		0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	0		0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	3,344		3,344		3,344		3,604
Accruing [Member] | Multiple Modification Types [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	111,295		111,295		111,295		118,553
Accruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[2]	38,413		38,413		38,413		34,473
Accruing [Member] | Multiple Modification Types [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	16,919		16,919		16,919		16,339
Accruing [Member] | Multiple Modification Types [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	55,332		55,332		55,332		50,812
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	8,146		8,146		8,146		9,698
Accruing [Member] | Multiple Modification Types [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	13,591		13,591		13,591		20,833
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	21,737		21,737		21,737		30,531
Accruing [Member] | Multiple Modification Types [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[2]	2,702		2,702		2,702		3,155
Accruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[2]	30,592		30,592		30,592		32,903
Accruing [Member] | Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate	[2]	932		932		932		1,152
Accruing [Member] | Multiple Modification Types [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	0		0		0		0
Accruing [Member] | Multiple Modification Types [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	34,226		34,226		34,226		37,210
Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		19,112	2,186	21,239	3,145
Recorded investment resulting from the following modification types		315,233		315,233		315,233		297,088
Nonaccruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		15,306	135	17,433	135
Commercial and industrial		90,628		90,628		90,628		55,556
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,488	1,098	3,488	2,057
Recorded investment resulting from the following modification types		21,944		21,944		21,944		19,447
Nonaccruing [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		893		893		893		951
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		18,794	1,233	20,921	2,192
Recorded investment resulting from the following modification types		113,465		113,465		113,465		75,954
Nonaccruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Recorded investment resulting from the following modification types		2,016		2,016		2,016		3,697
Nonaccruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Recorded investment resulting from the following modification types		14,378		14,378		14,378		10,007
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	846	0	846
Recorded investment resulting from the following modification types		16,394		16,394		16,394		13,704
Nonaccruing [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		3,000		3,000		3,000		2,194
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	107	318	107
1-4 family residential		10,338		10,338		10,338		10,942
Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0	0	0
Construction and other consumer real estate		182		182		182		210
Nonaccruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		13,520		13,520		13,520		13,346
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		318	$ 107	318	$ 107
Recorded investment resulting from the following modification types		143,379		143,379		143,379		103,004
Nonaccruing [Member] | Interest Rate Below Market [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		12,408		12,408		12,408		12,590
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		70		70		70		28
Nonaccruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,090		1,090		1,090		685
Nonaccruing [Member] | Interest Rate Below Market [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,160		1,160		1,160		713
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,752		1,752		1,752		1,844
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,752		1,752		1,752		1,844
Nonaccruing [Member] | Interest Rate Below Market [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		0		0		0		7
Nonaccruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		0		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		0		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		7
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,912		2,912		2,912		2,564
Nonaccruing [Member] | Maturity Or Team Extension [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		22,374		22,374		22,374		11,723
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		308		308		308		455
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		859		859		859		1,669
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		893		893		893		951
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,060		2,060		2,060		3,075
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		290		290		290		333
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,128		1,128		1,128		0
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,418		1,418		1,418		333
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		601		601		601		500
Nonaccruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		280		280		280		275
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		92		92		92		101
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		973		973		973		876
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,451		4,451		4,451		4,284
Nonaccruing [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		20,548		20,548		20,548		21,087
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		1,589		1,589		1,589		1,400
Nonaccruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		2,060		2,060		2,060		2,052
Nonaccruing [Member] | Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		0		0		0		17
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,649		3,649		3,649		3,469
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,649		3,649		3,649		3,469
Nonaccruing [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		6,981		6,981		6,981		4,350
Nonaccruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		1,182		1,182		1,182		1,879
Nonaccruing [Member] | Payment Deferral [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,968		2,968		2,968		724
Nonaccruing [Member] | Payment Deferral [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,150		4,150		4,150		2,603
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		46		46		46		54
Nonaccruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		292		292		292		136
Nonaccruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		37		37		37		48
Nonaccruing [Member] | Payment Deferral [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		375		375		375		238
Nonaccruing [Member] | Payment Deferral [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,525		4,525		4,525		2,841
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	36,425		36,425		36,425		49,846
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[1]	17,879		17,879		17,879		3,577
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	266		266		266		34
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	18,145		18,145		18,145		3,611
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	1,726		1,726		1,726		3,156
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	1,967		1,967		1,967		2,960
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	3,693		3,693		3,693		6,116
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[1]	0		0		0		0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[1]	802		802		802		1,180
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate	[1]	0		0		0		0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	802		802		802		1,180
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[1]	22,640		22,640		22,640		10,907
Nonaccruing [Member] | Multiple Modification Types [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	216,497		216,497		216,497		197,492
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[2]	71,189		71,189		71,189		49,617
Nonaccruing [Member] | Multiple Modification Types [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	16,761		16,761		16,761		16,335
Nonaccruing [Member] | Multiple Modification Types [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0		0
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	87,950		87,950		87,950		65,952
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	0		0		0		208
Nonaccruing [Member] | Multiple Modification Types [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	9,531		9,531		9,531		5,203
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	9,531		9,531		9,531		5,411
Nonaccruing [Member] | Multiple Modification Types [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[2]	764		764		764		233
Nonaccruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[2]	6,904		6,904		6,904		7,299
Nonaccruing [Member] | Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate	[2]	53		53		53		44
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	7,721		7,721		7,721		7,576
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	$ 105,202		$ 105,202		$ 105,202		$ 78,939
[1]	1 Includes TDRs that resulted from other modification types including, but not limited to, a legal judgment awarded on different terms, a bankruptcy plan confirmed on different terms, a settlement that includes the delivery of collateral in exchange for debt reduction, etc.
[2]	2 Includes TDRs that resulted from a combination of any of the previous modification types.

Loans And Allowance For Credi54

Loans And Allowance For Credit Losses (Summary Of Net Financial Impact On Interest Income Due To Interest Rate Modifications Below Market For Accruing TDR Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 19,112	$ 2,186	$ 21,239	$ 3,145	$ 161,600	$ 88,700
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,507,176		2,507,176		2,507,176		$ 2,416,357
Net financial impact on interest income	414	539	852	1,131
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Net financial impact on interest income	129	136	250	303
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Net financial impact on interest income	(1)	(26)	(2)	(63)
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,507,176		2,507,176		$ 2,507,176		$ 2,416,357
Net financial impact on interest income	211	274	447	553
Commercial and Industrial Sector [Member]
Financing Receivable, Modifications [Line Items]
Net financial impact on interest income	(79)	(64)	(151)	(119)
Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	3,488	1,098	3,488	2,057
Net financial impact on interest income	(50)	(72)	(99)	(184)
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	18,794	1,233	20,921	2,192
Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Net financial impact on interest income	(73)	(103)	(153)	(212)
One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
Net financial impact on interest income	(206)	(267)	(436)	(538)
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Net financial impact on interest income	(5)	(7)	(10)	(14)
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Net financial impact on interest income	74	129	155	275
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Net financial impact on interest income	0	0	(1)	(1)
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	19,112	2,186	21,239	3,145
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	3,488	1,098	3,488	2,057
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	18,794	1,233	20,921	2,192
Nonaccruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Nonaccruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0	$ 0

Loans And Allowance For Credi55

Loans And Allowance For Credit Losses (Schedule Of Investment Of Accruing And Nonaccruing Loans Modified As Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 19,112	$ 2,186	$ 21,239	$ 3,145	$ 161,600	$ 88,700
Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	19,112	2,186	21,239	3,145
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	15,306	135	17,433	135
Commercial And Industrial [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Commercial And Industrial [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	15,306	135	17,433	135
Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	3,488	1,098	3,488	2,057
Owner Occupied [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Owner Occupied [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	3,488	1,098	3,488	2,057
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	18,794	1,233	20,921	2,192
Commercial Loan [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Commercial Loan [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	18,794	1,233	20,921	2,192
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Term [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Term [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Commercial Real Estate [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Commercial Real Estate [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	846	0	846
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Home Equity Line of Credit [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Home Equity Line of Credit [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
One Through Four Family Residential [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
One Through Four Family Residential [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Construction And Other Consumer Real Estate [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	318	107	318	107
Consumer Loan [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0
Consumer Loan [Member] | Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 318	$ 107	$ 318	$ 107

Loans And Allowance For Credi56

Loans And Allowance For Credit Losses (Schedule Of Outstanding Balances Of All Required Payments And The Related Carrying Amounts For PCI Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		$ 304,375	$ 286,189
Financing Receivable, Recorded Investment, Current		42,197,200	40,363,353
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		160,908	147,980
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		143,467	138,209
Loans and Leases Receivable, Gross		42,501,575	40,649,542
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		28,994	32,024
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	390,973	217,427
Commercial		50,951	72,440
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Commercial Real Estate		53,083	65,167
Consumer		9,482	11,082
Outstanding balance		113,516	148,689
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Carrying Amount, Net		97,383	125,029
ALLL		1,520	945
Carrying amount, net		95,863	124,084
Commercial and Industrial Sector [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		135,044	97,436
Financing Receivable, Recorded Investment, Current		13,622,079	13,114,045
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		73,002	60,523
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		62,042	36,913
Loans and Leases Receivable, Gross		13,757,123	13,211,481
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		10,210	3,065
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	275,451	117,942
Finance Leases Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		2,337	703
Financing Receivable, Recorded Investment, Current		424,112	440,963
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0	183
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		2,337	520
Loans and Leases Receivable, Gross		426,449	441,666
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,826	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	13,403	3,309
Owner Occupied [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		51,404	64,942
Financing Receivable, Recorded Investment, Current		6,937,243	7,085,086
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,486	37,776
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		27,918	27,166
Loans and Leases Receivable, Gross		6,988,647	7,150,028
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		4,241	3,626
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	39,773	43,984
Municipal [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		0	7,632
Financing Receivable, Recorded Investment, Current		756,145	668,207
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0	7,586
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		0	46
Loans and Leases Receivable, Gross		756,145	675,839
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	46
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	893	951
Commercial Loan [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		188,785	170,713
Financing Receivable, Recorded Investment, Current		21,739,579	21,308,301
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		96,488	106,068
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		92,297	64,645
Loans and Leases Receivable, Gross		21,928,364	21,479,014
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		16,277	6,737
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	329,520	166,186
Commercial Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		25,490	6,142
Financing Receivable, Recorded Investment, Current		2,062,760	1,835,360
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,699	842
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,791	5,300
Loans and Leases Receivable, Gross		2,088,250	1,841,502
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	2,558	1,745
Term [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		36,301	45,011
Financing Receivable, Recorded Investment, Current		9,193,382	8,469,390
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		13,119	10,424
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		23,182	34,587
Loans and Leases Receivable, Gross		9,229,683	8,514,401
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		11,254	21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	36,774	24,867
Commercial Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		61,791	51,153
Financing Receivable, Recorded Investment, Current		11,256,142	10,304,750
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		36,818	11,266
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		24,973	39,887
Loans and Leases Receivable, Gross		11,317,933	10,355,903
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		11,254	21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	39,332	26,612
Home Equity Line of Credit [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		11,620	8,385
Financing Receivable, Recorded Investment, Current		2,495,556	2,407,972
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		6,230	4,717
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		5,390	3,668
Loans and Leases Receivable, Gross		2,507,176	2,416,357
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	4,687	3,053
One Through Four Family Residential [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		30,104	41,550
Financing Receivable, Recorded Investment, Current		5,649,946	5,340,549
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,936	14,828
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		19,168	26,722
Loans and Leases Receivable, Gross		5,680,050	5,382,099
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		288	1,036
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	15,742	20,939
Construction And Other Consumer Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		8,087	10,253
Financing Receivable, Recorded Investment, Current		411,212	374,987
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		7,504	8,593
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		583	1,660
Loans and Leases Receivable, Gross		419,299	385,240
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		314	1,337
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	308	408
Revolving Credit Facility [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		3,264	3,422
Financing Receivable, Recorded Investment, Current		456,443	440,358
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,217	1,861
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,047	1,561
Loans and Leases Receivable, Gross		459,707	443,780
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		861	1,217
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,332	146
Consumer Portfolio Segment [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		724	713
Financing Receivable, Recorded Investment, Current		188,322	186,436
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		715	647
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		9	66
Loans and Leases Receivable, Gross		189,046	187,149
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	52	83
Consumer Loan [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Financing Receivable, Recorded Investment, Past Due		53,799	64,323
Financing Receivable, Recorded Investment, Current		9,201,479	8,750,302
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		27,602	30,646
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		26,197	33,677
Loans and Leases Receivable, Gross		9,255,278	8,814,625
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,463	3,590
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	$ 22,121	$ 24,629
[1]	1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.

Loans And Allowance For Credi57

Loans And Allowance For Credit Losses (Schedule Of Changes In The Accretable Yield For PCI Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Loans And Allowance For Credit Losses [Abstract]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	$ (7,255)	$ (11,674)	$ (13,393)	$ (21,257)
Changes in Accretable Yield [Roll Forward]
Balance at beginning of period	43,105	50,931	39,803	45,055
Disposals and other	1,043	2,866	2,053	5,044
Balance at end of period	38,033	46,702	38,033	46,702
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 1,140	$ 4,579	$ 9,570	$ 17,860

Derivative Instruments And He58

Derivative Instruments And Hedging Activities (Narrative) (Details) - USD ($)		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ 7,794,000		$ (424,000)		$ 28,490,000	$ 3,829,000
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value		0				0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2,938,000		1,218,000		5,935,000	2,234,000
Fair values of derivative assets reduced (increased) by net credit valuation adjustments		7,000,000		1,700,000		7,000,000	1,700,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Future Expected		8,700,000				8,700,000
Total derivatives, Notional amount		5,865,763,000				5,865,763,000		$ 5,147,068,000
Cash collateral pledged for derivative liabilities		110,700,000				110,700,000
Additional collateral that would be required to be pledge if credit rating was downgraded by one notch		2,900,000				2,900,000
Derivative Instrument, Noninterest Income (Expense)		5,590,000		5,570,000		7,552,000	8,823,000
Derivatives Designated As Hedging Instrument Offset To Interest Expense		0		465,000		0	933,000
Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		7,794,000		(424,000)		28,490,000	3,829,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2,938,000		1,218,000		5,935,000	2,234,000
Total derivatives, Notional amount		1,387,500,000				1,387,500,000		1,387,500,000
Derivatives Designated As Hedging Instrument Offset To Interest Expense		0		465,000		0	933,000
Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	[1]	7,794,000		(424,000)		28,490,000	3,829,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[1]	2,938,000		1,218,000		5,935,000	2,234,000
Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		7,794,000		(424,000)		28,490,000	3,829,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2,938,000	[1]	1,218,000	[1]	5,935,000	2,234,000
Total derivatives, Notional amount		1,387,500,000				1,387,500,000		1,387,500,000
Derivatives Designated As Hedging Instruments [Member] | Fair Value Hedging [Member] | Terminated Swaps On Long Term Debt [Member]
Derivative [Line Items]
Derivatives Designated As Hedging Instrument Offset To Interest Expense		0		465,000		0	933,000
Derivatives Not Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total derivatives, Notional amount		4,478,263,000				4,478,263,000		3,759,568,000
Derivative Instrument, Noninterest Income (Expense)		5,590,000		5,570,000		7,552,000	8,823,000
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Total derivatives, Notional amount		219,708,000				219,708,000		40,314,000
Derivative Instrument, Noninterest Income (Expense)		1,921,000				2,156,000
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]
Derivative [Line Items]
Total derivatives, Notional amount		3,755,129,000				3,755,129,000		3,256,190,000
Derivative Instrument, Noninterest Income (Expense)		1,237,000		3,873,000		728,000	4,390,000
Derivatives Not Designated As Hedging Instruments [Member] | Future [Member]
Derivative [Line Items]
Derivative Instrument, Noninterest Income (Expense)				0			1,000
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Total derivatives, Notional amount		503,426,000				503,426,000		463,064,000
Derivative Instrument, Noninterest Income (Expense)		2,432,000		$ 1,697,000		4,668,000	$ 4,432,000
Other Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		127,757,000				127,757,000		72,568,000
Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		0				0		956,000
Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		0				0		956,000
Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		127,757,000				127,757,000		71,612,000
Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		406,000				406,000		8,000
Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		111,994,000				111,994,000		53,843,000
Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		15,357,000				15,357,000		17,761,000
Other Liabilities [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative [Line Items]
Gross amounts recognized		$ 127,757,000				$ 127,757,000		$ 72,568,000
[1]	Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the change in fair value of the derivative.

Derivative Instruments And He59

Derivative Instruments And Hedging Activities (Schedule Of Notional Amounts And Recorded Gross Fair Values And Related Gain (Loss) Of Derivative Instruments) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Derivative [Line Items]
Total derivatives, Notional amount		$ 5,865,763				$ 5,865,763		$ 5,147,068
Amount of derivative gain (loss), recognized in OCI		7,794		$ (424)		28,490	$ 3,829
Amount of derivative gain (loss), Reclassified from AOCI to interest income		2,938		1,218		5,935	2,234
Derivatives instruments, Noninterest income (expense)		5,590		5,570		7,552	8,823
Derivatives designated as hedging instruments, Offset to interest expense		0		465		0	933
Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		152,466				152,466		77,638
Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		127,757				127,757		72,568
Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total derivatives, Notional amount		1,387,500				1,387,500		1,387,500
Amount of derivative gain (loss), recognized in OCI		7,794		(424)		28,490	3,829
Amount of derivative gain (loss), Reclassified from AOCI to interest income		2,938		1,218		5,935	2,234
Derivatives designated as hedging instruments, Offset to interest expense		0		465		0	933
Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Amount of derivative gain (loss), recognized in OCI	[1]	7,794		(424)		28,490	3,829
Amount of derivative gain (loss), Reclassified from AOCI to interest income	[1]	2,938		1,218		5,935	2,234
Derivatives Designated As Hedging Instruments [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		27,073				27,073		5,461
Derivatives Designated As Hedging Instruments [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		0				0		956
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Total derivatives, Notional amount		1,387,500				1,387,500		1,387,500
Amount of derivative gain (loss), recognized in OCI		7,794		(424)		28,490	3,829
Amount of derivative gain (loss), Reclassified from AOCI to interest income		2,938	[1]	1,218	[1]	5,935	2,234
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		27,073				27,073		5,461
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		0				0		956
Derivatives Designated As Hedging Instruments [Member] | Terminated Swaps On Long-Term Debt [Member] | Fair Value Hedges [Member]
Derivative [Line Items]
Derivatives designated as hedging instruments, Offset to interest expense		0		465		0	933
Derivatives Not Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total derivatives, Notional amount		4,478,263				4,478,263		3,759,568
Derivatives instruments, Noninterest income (expense)		5,590		5,570		7,552	8,823
Derivatives Not Designated As Hedging Instruments [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		125,393				125,393		72,177
Derivatives Not Designated As Hedging Instruments [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		127,757				127,757		71,612
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Total derivatives, Notional amount		503,426				503,426		463,064
Derivatives instruments, Noninterest income (expense)		2,432		1,697		4,668	4,432
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		17,719				17,719		20,824
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		15,357				15,357		17,761
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Total derivatives, Notional amount		219,708				219,708		40,314
Derivatives instruments, Noninterest income (expense)		1,921				2,156
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		2,678				2,678		0
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		406				406		8
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]
Derivative [Line Items]
Total derivatives, Notional amount		3,755,129				3,755,129		3,256,190
Derivatives instruments, Noninterest income (expense)		1,237		3,873		728	4,390
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		104,996				104,996		51,353
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		$ 111,994				$ 111,994		$ 53,843
Derivatives Not Designated As Hedging Instruments [Member] | Future [Member]
Derivative [Line Items]
Derivatives instruments, Noninterest income (expense)				$ 0			$ 1
[1]	Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the change in fair value of the derivative.

Debt And Shareholders' Equity60

Debt And Shareholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	Apr. 25, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt And Shareholders' Equity [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]				Long-term debt is summarized as follows: (In thousands) June 30, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,357 246,170 Senior notes 286,578 400,334 Capital lease obligations 827 912 Total $ 698,712 $ 812,366
Junior Subordinated Notes		$ 164,950		$ 164,950			$ 164,950
Subordinated Debt		246,357		246,357			246,170
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				81,977	$ 8,439
Stockholders' Equity [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				(3,713)	84,430
Senior Notes		286,578		286,578			400,334
Capital Lease Obligations		827		827			912
Long-term Debt, Gross		698,712		698,712			812,366
Preferred Stock, Tender Offer	$ 120,000
Preferred Stock, Liquidation Preference, Value		119,000		119,000
Payments for Repurchase of Redeemable Preferred Stock		126,144	$ 0	126,144	0
Preferred Stock, Redemption		9,759	0	9,759	0
Accumulated Other Comprehensive Income (Loss), Net of Tax		23,652	(35,172)	23,652	(35,172)	$ (12,000)	$ (54,612)	$ (128,041)
Repayments of Long-term Debt		104,447	$ 44,420	115,083	$ 52,605
Senior Notes [Member]
Stockholders' Equity [Abstract]
Repayments of Long-term Debt				89,000
Senior Debt Obligations [Member]
Stockholders' Equity [Abstract]
Early Repayment of Senior Debt				15,000
Medium-term Notes [Member]
Stockholders' Equity [Abstract]
Early Repayment of Senior Debt				11,000
SERIES I PREFERRED STOCK [Member]
Stockholders' Equity [Abstract]
Preferred Stock, Liquidation Preference, Value		27,000		27,000
SERIES J STOCK [Member]
Stockholders' Equity [Abstract]
Preferred Stock, Liquidation Preference, Value		59,000		59,000
Series G Preferred Stock [Member]
Stockholders' Equity [Abstract]
Preferred Stock, Liquidation Preference, Value		$ 33,000		$ 33,000

Debt And Shareholders' Equity61

Debt And Shareholders' Equity (Schedule Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Debt And Shareholders' Equity [Line Items]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax			$ 40,322	$ 58,778
Interest income expense, net, after tax	$ 90,647	$ (1,100)	169,424	74,179
Income Tax Expense (Benefit)	60,231	5,499	101,679	56,675
Interest Income (Expense), Net	464,849	423,704	917,691	841,050
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			81,977	8,439
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(3,713)	84,430
Beginning balance	(12,000)		(54,612)	(128,041)
Other comprehensive income (loss)	35,305	79,737	78,264	92,869
Ending balance	23,652	(35,172)	23,652	(35,172)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax			8,407	1,867
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax			665	0
Other Comprehensive Income (Loss), Tax			49,394	60,645
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Debt And Shareholders' Equity [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			65,027	4,131
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(33)	85,812
Beginning balance			(18,369)	(91,921)
Other comprehensive income (loss)			64,994	89,943
Ending balance	46,625	(1,978)	46,625	(1,978)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Debt And Shareholders' Equity [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			17,615	4,308
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(3,680)	(1,382)
Beginning balance			1,546	2,226
Other comprehensive income (loss)			13,935	2,926
Ending balance	15,481	5,152	15,481	5,152
Accumulated Defined Benefit Plans Adjustment [Member]
Debt And Shareholders' Equity [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(665)	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0	0
Beginning balance			(37,789)	(38,346)
Other comprehensive income (loss)			(665)	0
Ending balance	(38,454)	(38,346)	(38,454)	(38,346)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Debt And Shareholders' Equity [Line Items]
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	25	(138,436)	53	(138,675)
Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Debt And Shareholders' Equity [Line Items]
Interest income expense, net, after tax	1,822	753	3,680	1,382
Income Tax Expense (Benefit)	1,116	465	2,255	852
Interest Income (Expense), Net	2,938	1,218	5,935	2,234
Fixed income securities gain loss [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Debt And Shareholders' Equity [Line Items]
Interest income expense, net, after tax	16	(85,664)	33	(85,812)
Income Tax Expense (Benefit)	$ 9	$ (52,772)	$ 20	$ (52,863)

Debt And Shareholders' Equity62

Debt And Shareholders' Equity Schedule of Long-Term Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 164,950	$ 164,950
Subordinated Debt	246,357	246,170
Senior Notes	286,578	400,334
Capital Lease Obligations	827	912
Long-term Debt, Gross	$ 698,712	$ 812,366

Debt And Shareholders' Equity63

Debt And Shareholders' Equity JUNIOR SUBORDINATED NOTES (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 164,950	$ 164,950	$ 164,950
AMEGY STATUTORY TRUST ONE [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 51,547	$ 51,547
Coupon Rate	3mL+2.85%
Debt Instrument, Date of First Required Payment		Sep. 17, 2016
AMEGY STATUTORY TRUSTS 2 [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 36,083	$ 36,083
Coupon Rate	3mL+1.90%
Debt Instrument, Date of First Required Payment		Oct. 7, 2016
AMEGY STATUTORY TRUSTS 3 [Member] [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 61,856	$ 61,856
Coupon Rate	3mL+1.78%
Debt Instrument, Date of First Required Payment		Sep. 15, 2016
STOCKMEN S STATUTORY TRUST 2 [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 7,732	$ 7,732
Coupon Rate	3mL+3.15%
Debt Instrument, Date of First Required Payment		Sep. 26, 2016
STOCKMEN S STATUTORY TRUST 3 [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 7,732	$ 7,732
Coupon Rate	3mL+2.89%
Debt Instrument, Date of First Required Payment		Sep. 17, 2016

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	34.60%	28.30%	33.20%	34.80%
Deferred Tax Assets, Net	$ 164		$ 164		$ 203

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Other noninterest-bearing investments valued under the cost method	$ 17,900		$ 17,900		$ 25,300
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	191,200		191,200		191,500
Net gains on sale of OREO properties	527	$ 445	1,856	$ 71
Principal amount of other real estate owned property sold			4,700	10,100
OREO Properties [Member]
Derivatives, Fair Value [Line Items]
Net gains on sale of OREO properties	1,000	$ 1,100	2,900	$ 1,900
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair value of AFS securities	9,391,544		9,391,544		7,581,309
Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Fair value of AFS securities	0		0		$ 0
Third Party Pricing Service [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair value of AFS securities	$ 0		$ 0

Fair Value (Schedule Of Assets

Fair Value (Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading account	$ 118,775	$ 48,168
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	140,485	133,541
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	10,136,791	8,172,774
Total liabilities	112,400	54,678
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	186,970	167,201
Total liabilities	100,672	132,489
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	9,477,089	7,643,116
Trading account	118,775	48,168
Total assets	10,464,246	8,473,516
Securities sold, not yet purchased	1,609	30,158
Total liabilities	213,072	187,167
Mutual Funds And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	86,273	100,636
Bank-owned life insurance [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	491,725	485,978
Private Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	122,257	120,027
Interest-Only-Strip [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	18,228	13,514
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	83,706	84,570
Other Liabilities, Fair Value Disclosure	83,706	84,570
Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	8,695,993	7,100,844
Available-for-sale Securities [Member] | Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	673,267	418,695
Available-for-sale Securities [Member] | Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	21,556
Asset-Backed Securities [Member] | Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		22,941
Derivatives [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	152,466	78,143
Other Liabilities, Fair Value Disclosure	127,757	72,439
Derivatives [Member] | Interest Rate Related And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	29,751	5,966
Other Liabilities, Fair Value Disclosure	406	835
Derivatives [Member] | Interest Rate Swaps [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	104,996	51,353
Other Liabilities, Fair Value Disclosure	111,994	53,843
Derivatives [Member] | Foreign Currency Exchange Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	17,719	20,824
Other Liabilities, Fair Value Disclosure	15,357	17,761
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	9,391,544	7,581,309
Trading account	118,775	48,168
Securities sold, not yet purchased	0	0
Fair Value, Inputs, Level 2 [Member] | Mutual Funds And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	728	38,829
Fair Value, Inputs, Level 2 [Member] | Bank-owned life insurance [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	491,725	485,978
Fair Value, Inputs, Level 2 [Member] | Private Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments
Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	8,695,993	7,100,844
Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	673,267	418,695
Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member] | Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	21,556
Fair Value, Inputs, Level 2 [Member] | Asset-Backed Securities [Member] | Other (Including ABS CDOs) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		22,941
Fair Value, Inputs, Level 2 [Member] | Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	134,747	57,319
Other Liabilities, Fair Value Disclosure	112,400	54,678
Fair Value, Inputs, Level 2 [Member] | Derivatives [Member] | Interest Rate Related And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	29,751	5,966
Other Liabilities, Fair Value Disclosure	406	835
Fair Value, Inputs, Level 2 [Member] | Derivatives [Member] | Interest Rate Swaps [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	104,996	51,353
Other Liabilities, Fair Value Disclosure	111,994	53,843
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Securities sold, not yet purchased	0	0
Fair Value, Inputs, Level 3 [Member] | Private Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	122,257	120,027
Fair Value, Inputs, Level 3 [Member] | Interest-Only-Strip [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	18,228	13,514
Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure
Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member] | Other (Including ABS CDOs) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure
Fair Value, Inputs, Level 3 [Member] | Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	85,545	61,807
Securities sold, not yet purchased	1,609	30,158
Fair Value, Inputs, Level 1 [Member] | Mutual Funds And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	85,545	61,807
Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	83,706	84,570
Other Liabilities, Fair Value Disclosure	83,706	84,570
Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	17,719	20,824
Other Liabilities, Fair Value Disclosure	15,357	17,761
Fair Value, Inputs, Level 1 [Member] | Derivatives [Member] | Foreign Currency Exchange Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	17,719	20,824
Other Liabilities, Fair Value Disclosure	$ 15,357	$ 17,761

Fair Value (Schedule Of Asset67

Fair Value (Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total net gains (losses) included in, Other noninterest expense	$ 50,148	$ 48,244	$ 100,282	$ 102,191
Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	0	2,465	0	4,164
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale		1		3
Total net gains (losses) included in, Fixed income securities gains (losses), net		(375)		(344)
Total net gains (losses) included in, Other comprehensive income (loss)		560		687
Total net gains (losses) included in, Sales		2,651		2,651
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements				(1,859)
Fair value of assets, Ending balance	0	0	0	0
Banks, Trust and Insurance, Equities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	0	438,338	0	393,007
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale		214		471
Total net gains (losses) included in, Fixed income securities gains (losses), net		(136,368)		(136,691)
Total net gains (losses) included in, Other comprehensive income (loss)		148,496		141,547
Fair Value of Securities Reclassified from HTM to AFS				57,308
Total net gains (losses) included in, Sales		437,442		440,055
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(13,238)		(15,587)
Fair value of assets, Ending balance	0	0	0	0
Other Asset-Backed [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	0	4,803	0	4,761
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale
Total net gains (losses) included in, Fixed income securities gains (losses), net		(606)		(606)
Total net gains (losses) included in, Other comprehensive income (loss)		(116)		(74)
Total net gains (losses) included in, Sales		4,081		4,081
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements
Fair value of assets, Ending balance	0	0	0	0
Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	119,222	105,232	120,027	97,649
Total net gains (losses) included in, Dividends and other investment income	130	(1,633)	(1,354)	(559)
Total net gains (losses) included in, Equity securities gains, net	2,555	714	546	3,967
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	4,515	7,262	7,316	12,314
Total net gains (losses) included in, Sales	(3,378)	(991)	(3,414)	(2,508)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(787)	(469)	(864)	(748)
Fair value of assets, Ending balance	122,257	110,115	122,257	110,115
Servicing Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of liabilities, Beginning balance	17,067	12,001	13,514	12,227
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Noninterest Income	1,531	1,483	4,991	1,487
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		210	368	381
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(370)	(192)	(645)	(593)
Fair value of liabilities, Ending balance	18,228	13,502	18,228	13,502
Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of liabilities, Beginning balance	0	0	0	(13)
Total net gains (losses) included in, Other noninterest expense				13
Total net gains (losses) included in, Purchases
Fair value of liabilities, Ending balance	0	$ 0	0	$ 0
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	83,706		83,706		$ 84,570
Other Liabilities, Fair Value Disclosure	83,706		83,706		84,570
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	83,706		83,706		84,570
Other Liabilities, Fair Value Disclosure	$ 83,706		$ 83,706		$ 84,570

Fair Value (Schedule Of Realize

Fair Value (Schedule Of Realized Gains (Losses) Using Level 3 Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Dividends and Other Investment Income (Loss) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Realized gains (losses) from Level 3 inputs	$ 0	$ 4	$ 0	$ 4
Fixed Income Securities Gains (Losses), Net [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Realized gains (losses) from Level 3 inputs	0	(137,349)	0	(137,641)
Level 3 Equity Securities Gains (Losses), Net [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Realized gains (losses) from Level 3 inputs	93	(674)	93	(674)
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assets Measured On Recurring Basis And Gain Loss Included In Fixed Income Securities Gains (Losses), Net		(375)		(344)
Fair Value, Assets Measured On Recurring Basis, And Gain (Loss) Included In Accretion Of Purchase Discount On Securities Available-For-Sale		$ 1		$ 3
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	83,706		83,706		$ 84,570
Other Liabilities, Fair Value Disclosure	$ 83,706		$ 83,706		$ 84,570

Fair Value Fair Value (Summary

Fair Value Fair Value (Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Credit Derivatives [Member] | Asset-Backed Securities [Member]
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]
Investments, Fair Value Disclosure		$ 22,941
Level 3 [Member]
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0

Fair Value (Schedule Of Asset70

Fair Value (Schedule Of Assets With Fair Value Changes On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Principal amount of other real estate owned property sold			$ 4,700	$ 10,100
Gains (losses) from fair value changes	$ (15,359)	$ (4,243)	(30,429)	(8,953)
Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains (losses) from fair value changes	(14,796)	(2,808)	(29,487)	(5,357)
Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains (losses) from fair value changes	0	(1,125)	(342)	(2,278)
Other Real Estate Owned [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains (losses) from fair value changes	(563)	$ (310)	(600)	$ (1,318)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		$ 0
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		0
Fair Value, Inputs, Level 1 [Member] | Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		0
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	54,693		54,693		13,379
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	51,033		51,033		10,991
Fair Value, Inputs, Level 2 [Member] | Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		0
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	3,660		3,660		2,388
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	1,477		1,477		10,707
Level 3 [Member] | Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		0
Level 3 [Member] | Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	1,477		1,477		10,707
Level 3 [Member] | Other Real Estate Owned [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	0		0		0
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	56,170		56,170		24,086
Estimate of Fair Value Measurement [Member] | Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	51,033		51,033		10,991
Estimate of Fair Value Measurement [Member] | Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	1,477		1,477		10,707
Estimate of Fair Value Measurement [Member] | Other Real Estate Owned [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	$ 3,660		$ 3,660		$ 2,388

Fair Value (Schedule Of Carryin

Fair Value (Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Held-to-maturity Securities	$ 713,392	$ 545,648
Held-to-maturity, fair value	720,991	552,088
Time deposits	2,336,088	2,130,680
Interest-bearing Deposit Liabilities, Foreign	117,708	294,391
Long-term debt (less fair value hedges)	698,712	812,366
Reported Value Measurement [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Loans and leases (including loans held for sale), net of allowance	42,039,742	40,193,374
Long-term debt (less fair value hedges)	698,712	812,366
Estimate of Fair Value Measurement [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Loans and leases (including loans held for sale), net of allowance	42,184,148	39,535,365
Time deposits	2,343,427	2,129,742
Foreign deposits	117,690	294,321
Long-term debt (less fair value hedges)	$ 738,760	$ 838,796

Commitments, Guarantees, And 72

Commitments, Guarantees, And Contingent Liabilities (Narrative) (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2016USD ($)
Guarantor Obligations [Line Items]
Letters of credit, accrued liability	$ 4,700
Reserve for unfunded lending commitments	1,900
Deferred commitment fees	2,800
Guarantee of trust preferred securities issued by affiliated trusts	165,000
Commitments for Private Equity and Other Noninterest-bearing Investments	20,000
Minimum [Member]
Guarantor Obligations [Line Items]
Litigation Settlement, Amount	37,500
Loss Contingency, Estimate of Possible Loss	0
Maximum [Member]
Guarantor Obligations [Line Items]
Litigation Settlement, Amount	37,750
Loss Contingency, Estimate of Possible Loss	$ 20,000

Commitments, Guarantees, And 73

Commitments, Guarantees, And Contingent Liabilities (Schedule Of Guarantees Issued) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Unused Commitments to Extend Credit	$ 17,524,020	$ 17,169,785
Commercial Letters Of Credit	46,254	18,447
Total Unfunded Lending Commitments	18,546,363	18,066,629
Financial [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Standby letters of credit	771,167	661,554
Performance [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Standby letters of credit	204,922	$ 216,843
Minimum [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Litigation Settlement, Amount	37,500
Loss Contingency, Estimate of Possible Loss	0
Maximum [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Litigation Settlement, Amount	37,750
Loss Contingency, Estimate of Possible Loss	$ 20,000

Retirement Plans (Schedule Of N

Retirement Plans (Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	1,762	1,783	3,525	3,566
Expected return on plan assets	(2,754)	(3,090)	(5,509)	(6,180)
Amortization of net actuarial (gain) loss	1,659	1,574	3,319	3,147
Net periodic benefit cost (credit)	667	267	1,335	533
Supplemental Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	101	101	201	201
Expected return on plan assets	0	0	0	0
Amortization of net actuarial (gain) loss	29	31	59	62
Net periodic benefit cost (credit)	130	132	260	263
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	8	10	16
Interest cost	10	10	19	20
Expected return on plan assets	0	0	0	0
Amortization of net actuarial (gain) loss	(17)	(13)	(33)	(26)
Net periodic benefit cost (credit)	$ (2)	$ 5	$ (4)	$ 10

Operating Segment Information75

Operating Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)Branches	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)Branches	Jun. 30, 2015USD ($)
Segment Reporting Information [Line Items]
Realized Losses on Sales of CDOs				$ 137,000
Net interest income	$ 464,849	$ 423,704	$ 917,691	841,050
Provision for loan losses	34,492	566	76,637	(928)
Net interest income after provision for loan losses	430,357	423,138	841,054	841,978
Other noninterest income	1,142	5,693	4,036	6,615
Noninterest expense	381,894	398,997	777,467	791,974
Income before income taxes	174,180	19,459	306,065	162,660
Income Tax Expense (Benefit)	60,231	5,499	101,679	56,675
Zions Bank [Member]
Segment Reporting Information [Line Items]
Net interest income	158,800	154,100	313,400	307,100
Provision for loan losses	100	(8,400)	(30,500)	(13,000)
Net interest income after provision for loan losses	158,700	162,500	343,900	320,100
Other noninterest income	36,700	33,700	72,700	64,700
Noninterest expense	97,900	109,300	195,000	216,900
Income before income taxes	97,500	86,900	221,600	167,900
Total loans	12,600,000	12,091,000	12,453,000	12,096,000
Total deposits	15,977,000	15,953,000	15,839,000	15,871,000
Amegy [Member]
Segment Reporting Information [Line Items]
Net interest income	122,000	115,500	240,100	232,800
Provision for loan losses	30,700	13,900	135,200	25,100
Net interest income after provision for loan losses	91,300	101,600	104,900	207,700
Other noninterest income	28,100	30,500	57,200	59,700
Noninterest expense	75,100	93,300	160,800	186,300
Income before income taxes	44,300	38,800	1,300	81,100
Total loans	10,761,000	10,159,000	10,566,000	10,217,000
Total deposits	$ 10,959,000	11,246,000	$ 11,116,000	11,384,000
Number of branches | Branches	75		75
California Bank Trust [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 114,000	107,100	$ 220,500	210,700
Provision for loan losses	4,100	(3,500)	1,000	(7,600)
Net interest income after provision for loan losses	109,900	110,600	219,500	218,300
Other noninterest income	16,400	18,200	32,500	32,300
Noninterest expense	64,000	79,000	132,500	153,000
Income before income taxes	62,300	49,800	119,500	97,600
Total loans	9,260,000	8,472,000	9,083,000	8,487,000
Total deposits	$ 10,882,000	9,865,000	$ 10,681,000	9,783,000
Number of branches | Branches	94		94
NBA [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 48,300	45,500	$ 94,800	89,600
Provision for loan losses	0	2,700	1,800	3,400
Net interest income after provision for loan losses	48,300	42,800	93,000	86,200
Other noninterest income	10,000	9,700	19,500	17,900
Noninterest expense	32,200	37,100	64,700	74,200
Income before income taxes	26,100	15,400	47,800	29,900
Total loans	4,008,000	3,846,000	3,936,000	3,805,000
Total deposits	$ 4,582,000	4,292,000	$ 4,513,000	4,235,000
Number of branches | Branches	65		65
Nevada State Bank [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 30,600	31,300	$ 61,200	62,200
Provision for loan losses	800	(3,000)	(24,700)	(11,700)
Net interest income after provision for loan losses	29,800	34,300	85,900	73,900
Other noninterest income	9,700	9,500	19,200	18,300
Noninterest expense	30,800	34,100	61,600	66,500
Income before income taxes	8,700	9,700	43,500	25,700
Total loans	2,274,000	2,357,000	2,269,000	2,371,000
Total deposits	$ 4,103,000	3,902,000	$ 4,057,000	3,829,000
Number of branches | Branches	49		49
Vectra Bank Colorado [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 29,700	29,700	$ 60,300	58,500
Provision for loan losses	(2,700)	(300)	(5,900)	3,500
Net interest income after provision for loan losses	32,400	30,000	66,200	55,000
Other noninterest income	5,500	5,300	11,300	10,400
Noninterest expense	21,100	24,400	42,600	48,400
Income before income taxes	16,800	10,900	34,900	17,000
Total loans	2,415,000	2,401,000	2,434,000	2,379,000
Total deposits	2,667,000	2,831,000	2,725,000	2,700,000
TCBW [Member]
Segment Reporting Information [Line Items]
Net interest income	9,500	8,900	18,800	17,000
Provision for loan losses	1,400	(800)	(400)	(600)
Net interest income after provision for loan losses	8,100	9,700	19,200	17,600
Other noninterest income	1,400	1,000	2,300	2,000
Noninterest expense	5,100	(1,500)	10,100	6,300
Income before income taxes	4,400	12,200	11,400	13,300
Total loans	777,000	721,000	755,000	717,000
Total deposits	947,000	852,000	950,000	841,000
Other Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	(48,100)	(68,400)	(91,400)	(136,800)
Provision for loan losses	0	0	100	0
Net interest income after provision for loan losses	(48,100)	(68,400)	(91,500)	(136,800)
Other noninterest income	17,900	(112,600)	27,800	(92,600)
Noninterest expense	55,700	23,300	110,200	40,400
Income before income taxes	(85,900)	(204,300)	(173,900)	(269,800)
Total loans	13,000	84,000	60,000	83,000
Total deposits	$ (167,000)	(816,000)	$ (128,000)	(837,000)
Utah [Member] | Zions Bank [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	99		99
Idaho [Member] | Zions Bank [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	24		24
WYOMING | Zions Bank [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1		1
Colorado [Member] | Vectra Bank Colorado [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	36		36
New Mexico [Member] | Vectra Bank Colorado [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1		1
WASHINGTON | TCBW [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1		1
OREGON | TCBW [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1		1
Consolidated Entities [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 464,800	423,700	$ 917,700	841,100
Provision for loan losses	34,400	600	76,600	(900)
Net interest income after provision for loan losses	430,400	423,100	841,100	842,000
Other noninterest income	125,700	(4,700)	242,500	112,700
Noninterest expense	381,900	399,000	777,500	792,000
Income before income taxes	174,200	19,400	306,100	162,700
Total loans	42,108,000	40,131,000	41,556,000	40,155,000
Total deposits	$ 49,950,000	$ 48,125,000	$ 49,753,000	$ 47,806,000