Zions Bancorporation, National Association (ZION) 10-Q 9 May 16 2016 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 29, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
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		204,623,502

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 517,803	$ 798,319
Money market investments:
Interest-bearing deposits	3,039,090	6,108,124
Federal funds sold and security resell agreements	1,587,212	619,758
Investment securities:
Available-for-sale, at fair value	8,701,885	7,643,116
Trading account, at fair value	65,838	48,168
Loans held for sale	108,764	149,880
Marketable securities, total	9,399,369	8,236,932
Loans and leases, net of unearned income and fees:
Loans and leases receivable, net of unearned income and fees	41,418,185	40,649,542
Less allowance for loan losses	611,894	606,048
Loans, net of allowance	40,806,291	40,043,494
Other noninterest-bearing investments	855,813	848,144
Premises and equipment, net	925,430	905,462
Goodwill	1,014,129	1,014,129
Core deposit and other intangibles	14,259	16,272
Other Real Estate, Foreclosed Assets, and Repossessed Assets	10,411	7,092
Other assets	901,342	916,937
Total assets	59,179,913	59,664,543
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing demand	21,872,274	22,276,664
Interest-bearing:
Deposits, Savings Deposits	25,723,996	25,672,356
Total deposits	49,887,857	50,374,091
Federal funds and other short-term borrowings	232,188	346,987
Long-term debt	802,448	812,366
Reserve for unfunded lending commitments	69,026	74,838
Other liabilities	562,657	548,742
Total liabilities	51,554,176	52,157,024
Shareholders' equity:
Preferred stock, without par value, authorized 4,400,000 shares	828,490	828,490
Common stock, without par value; authorized 350,000,000 shares; issued and outstanding 204,543,707 and 204,417,093 shares	4,777,630	4,766,731
Retained earnings	2,031,270	1,966,910
Accumulated other comprehensive income (loss)	(11,653)	(54,612)
Total shareholders' equity	7,625,737	7,507,519
Total liabilities and shareholders' equity	59,179,913	59,664,543
Reported Value Measurement [Member]
Investment securities:
Held-to-maturity, at amortized cost (approximate fair value $636,484 and $552,088)	631,646	545,648
Interest-bearing:
Time	2,071,688	2,130,680
Foreign	219,899	294,391
Long-term debt	$ 802,448	$ 812,366

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Preferred stock, authorized shares	4,400,000	4,400,000
Common stock, authorized shares	350,000,000	350,000,000
Common stock, issued shares	204,543,707	204,417,093
Common stock, outstanding shares	204,543,707	204,417,093
Estimate of Fair Value Measurement [Member]
Held-to-maturity, fair value	$ 636,484	$ 552,088

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income:
Interest and fees on loans	$ 420,508	$ 415,755
Interest on money market investments	7,029	5,218
Interest on Securities	47,364	27,473
Interest on securities:
Interest and Dividend Income, Operating	474,901	448,446
Interest expense:
Interest on deposits	11,845	12,104
Interest on short- and long-term borrowings	10,214	18,996
Total interest expense	22,059	31,100
Net interest income	452,842	417,346
Provision for loan losses	42,145	(1,494)
Net interest income after provision for loan losses	410,697	418,840
Noninterest income:
Service charges and fees on deposit accounts	41,261	41,194
Other service charges, commissions and fees	49,474	43,002
Wealth management income	7,954	7,615
Loan sales and servicing income	7,979	7,706
Capital markets and foreign exchange	5,667	5,501
Dividends and other investment income	4,639	9,372
Fair value and nonhedge derivative income (loss)	(2,585)	(1,088)
Equity securities gains (losses), net	(550)	3,353
Fixed income securities gains (losses), net	28	(239)
Other	2,894	922
Total noninterest income	116,761	117,338
Noninterest expense:
Salaries and employee benefits	258,338	243,519
Occupancy, net	29,779	29,339
Furniture, equipment and software	32,015	29,713
Other real estate expense, net	(1,329)	374
Credit-related expense	5,934	5,939
Provision for Unfunded Lending Commitments	5,812	(1,211)
Professional and legal services	11,471	11,483
Advertising	5,628	6,975
FDIC premiums	7,154	8,119
Amortization of core deposit and other intangibles	2,014	2,358
Debt extinguishment cost	247	0
Other	50,134	53,947
Total noninterest expense	395,573	392,977
Income before income taxes	131,885	143,201
Income taxes	41,448	51,176
Net income	90,437	92,025
Dividends on preferred stock	(11,660)	(16,746)
Net earnings applicable to common shareholders	$ 78,777	$ 75,279
Weighted average common shares outstanding during the period:
Basic shares	203,967	202,603
Diluted shares	204,096	202,944
Net earnings per common share:
Basic	$ 0.38	$ 0.37
Diluted	$ 0.38	$ 0.37

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net income for the period	$ 90,437	$ 92,025
Other comprehensive income, net of tax:
Unrealized holding gains on investment securities	32,168	486
Reclassification of HTM securities to AFS Securities	0	10,938
Reclassification to earnings for realized net fixed income securities losses (gains)	(17)	148
Net unrealized gains (losses) on other noninterest-bearing investments	430	(364)
Net unrealized holding gains on derivative instruments	12,901	2,553
Reclassification adjustment for increase in interest income recognized in earnings on derivatives instruments	(1,858)	(629)
Pension and Postretirement	665	0
Other comprehensive income	42,959	13,132
Comprehensive income	133,396	105,157
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	92,025			92,025
Other comprehensive income, net of tax	13,132				13,132
Subordinated debt converted to preferred stock	15	$ 21	$ (6)
Net activity under employee plans and related tax benefits	4,707		$ 4,707
Net activity under employee plans and related tax benefits, shares			178,088
Dividends on preferred stock	(16,746)			(16,746)
Dividends on common stock	(8,176)			(8,176)
Change in deferred compensation	(189)			(189)
Balance at Mar. 31, 2015	7,454,298	$ 1,004,032	$ 4,728,556	1,836,619	(114,909)
Balance (in shares) at Mar. 31, 2015			203,192,991
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	$ 90,437			90,437
Other comprehensive income, net of tax	42,959				42,959
Net activity under employee plans and related tax benefits	10,899		$ 10,899
Net activity under employee plans and related tax benefits, shares			126,614
Dividends on preferred stock	(11,660)			(11,660)
Dividends on common stock	(12,350)			(12,350)
Change in deferred compensation	(2,067)			(2,067)
Balance at Mar. 31, 2016	$ 7,625,737	$ 828,490	$ 4,777,630	$ 2,031,270	$ (11,653)
Balance (in shares) at Mar. 31, 2016	204,543,707		204,543,707

Consolidated Statements Of Cha7

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Dividends on common stock, per share	$ 0.06	$ 0.04

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income for the period	$ 90,437	$ 92,025
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	36,333	(283)
Depreciation and amortization	40,736	34,169
Fixed income securities losses (gains), net	(28)	239
Deferred income tax expense (benefit)	(4,680)	3,402
Net increase in trading securities	(17,670)	(1,021)
Net decrease in loans held for sale	38,566	3,517
Change in other liabilities	17,770	25,566
Change in other assets	7,301	(65,248)
Other, net	13,997	(3,549)
Net cash provided by operating activities	222,762	88,817
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in money market investments	2,101,580	253,274
Proceeds from maturities and paydowns of investment securities held-to-maturity	22,036	39,323
Purchases of investment securities held-to-maturity	(108,141)	(22,576)
Proceeds from sales, maturities, and paydowns of investment securities available-for-sale	2,098,526	228,894
Purchases of investment securities available-for-sale	(3,123,244)	(784,856)
Net change in loans and leases	(808,358)	(100,442)
Purchases of premises and equipment	(40,015)	(33,533)
Proceeds from sales of other real estate owned	4,304	3,401
Other, net	(10,565)	3,351
Net cash provided by (used in) investing activities	136,123	(413,164)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposits	(486,234)	275,285
Net change in short-term funds borrowed	(114,799)	(40,626)
Repayments of long-term debt	(10,636)	(8,185)
Proceeds from issuances of common stock	538	962
Dividends paid on common and preferred stock	(27,421)	(23,234)
Other, net	(849)	(939)
Net cash provided by (used in) financing activities	(639,401)	203,263
Net decrease in cash and due from banks	(280,516)	(121,084)
Cash and due from banks at beginning of period	798,319	841,942
Cash and due from banks at end of period	517,803	720,858
Cash paid for interest	18,430	22,119
Net refunds received for income taxes	$ (84)	$ (500)

Basis of Presentaion

Basis of Presentaion	3 Months Ended
	Mar. 31, 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 months ended March 31, 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)	3 Months Ended
	Mar. 31, 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) ASU 2016-08, Revenue from Contracts with Customers (Topic 606), Principal vs. Agent Considerations (Reporting Revenue Gross versus Net) 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, as extended in August 2015 by ASU 2015-14 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, 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 adopted by the Company ASU 2015-02, Amendments to the Consolidation Analysis (Topic 810) 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, Simplifying the Presentation of Debt Issuance Costs (Subtopic 835-30) 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, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement (Subtopic 350-40) 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, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or its Equivalent), (Topic 820) 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	3 Months Ended
	Mar. 31, 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 2016 2015 Loans and leases transferred to other real estate owned $ 5,998 $ 3,568 Loans held for sale reclassified as loans held for investment 1,976 13,138 Amortized cost of HTM securities reclassified as AFS securities — 79,276

Offsetting Assets and Liabiliti

Offsetting Assets and Liabilities (Notes)	3 Months Ended
	Mar. 31, 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: March 31, 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 $ 1,587,212 $ — $ 1,587,212 $ — $ — $ 1,587,212 Derivatives (included in other assets) 125,363 — 125,363 (22,322 ) — 103,041 $ 1,712,575 $ — $ 1,712,575 $ (22,322 ) $ — $ 1,690,253 Liabilities: Federal funds and other short-term borrowings $ 232,188 $ — $ 232,188 $ — $ — $ 232,188 Derivatives (included in other liabilities) 104,469 — 104,469 (22,322 ) (71,149 ) 10,998 $ 336,657 $ — $ 336,657 $ (22,322 ) $ (71,149 ) $ 243,186 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 (5,916 ) 71,722 $ 697,396 $ — $ 697,396 $ (5,916 ) $ — $ 691,480 Liabilities: Federal funds and other short-term borrowings $ 346,987 $ — $ 346,987 $ — $ — $ 346,987 Derivatives (included in other liabilities) 72,568 — 72,568 (5,916 ) (61,134 ) 5,518 $ 419,555 $ — $ 419,555 $ (5,916 ) $ (61,134 ) $ 352,505 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	3 Months Ended
	Mar. 31, 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. March 31, 2016 (In thousands) Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 631,646 $ 11,519 $ 6,681 $ 636,484 Available-for-sale U.S. Government agencies and corporations: Agency securities 1,497,652 14,055 856 1,510,851 Agency guaranteed mortgage-backed securities 4,487,279 17,801 9,091 4,495,989 Small Business Administration loan-backed securities 2,019,668 14,480 13,321 2,020,827 Municipal securities 552,872 4,391 1,190 556,073 Other debt securities 25,434 147 3,672 21,909 8,582,905 50,874 28,130 8,605,649 Money market mutual funds and other 96,132 104 — 96,236 8,679,037 50,978 28,130 8,701,885 Total $ 9,310,683 $ 62,497 $ 34,811 $ 9,338,369 December 31, 2015 (In thousands) Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair 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 March 31, 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 $ 69,225 $ 69,515 $ 1,187,108 $ 1,189,787 Principal return after one year through five years 238,605 242,328 3,483,268 3,491,732 Principal return after five years through ten years 203,989 207,198 2,769,584 2,781,632 Principal return after ten years 119,827 117,443 1,142,945 1,142,498 $ 631,646 $ 636,484 $ 8,582,905 $ 8,605,649 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: March 31, 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 $ 5,952 $ 193,737 $ 729 $ 12,480 $ 6,681 $ 206,217 Available-for-sale U.S. Government agencies and corporations: Agency securities 312 299,591 544 129,191 856 428,782 Agency guaranteed mortgage-backed securities 6,836 1,707,106 2,255 149,293 9,091 1,856,399 Small Business Administration loan-backed securities 4,549 539,651 8,772 528,850 13,321 1,068,501 Municipal securities 935 140,612 255 14,231 1,190 154,843 Other — — 3,672 11,331 3,672 11,331 12,632 2,686,960 15,498 832,896 28,130 3,519,856 Mutual funds and other — — — — — — 12,632 2,686,960 15,498 832,896 28,130 3,519,856 Total $ 18,584 $ 2,880,697 $ 16,227 $ 845,376 $ 34,811 $ 3,726,073 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 March 31, 2016 and December 31, 2015 , respectively, 157 and 187 HTM and 684 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 March 31, 2016 : OTTI – U.S. Government Agencies and Corporations Agency Guaranteed Mortgage-Backed Securities: These pass-through securities are comprised largely of fixed and floating-rate residential mortgage-backed securities issued by the Government National Mortgage Association (“GNMA”), the Federal National Mortgage Association (“FNMA”), or the Federal Home Loan Mortgage Corporation (“FHLMC”). They were generally purchased at premiums with maturity dates from 10 to 15 years for fixed-rate securities and 30 years for floating-rate securities. These securities benefit from certain guarantee provisions or, in the case of GNMA, direct U.S. government guarantees. Unrealized losses relate to changes in interest rates subsequent to purchase and are not attributable to credit. At March 31, 2016 , we did not have an intent to sell identified 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 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 March 31, 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 first quarter of 2016 . The following is a tabular rollforward of the total amount of credit-related OTTI: (In thousands) Three Months Ended Three Months Ended HTM AFS Total HTM AFS Total Balance of credit-related OTTI at beginning of period $ — $ — $ — $ (9,079 ) $ (95,472 ) $ (104,551 ) Reductions for securities sold or paid off during the period — — — — 1,313 1,313 Reclassification of securities from HTM to AFS — — — 9,079 (9,079 ) — Balance of credit-related OTTI at end of period $ — $ — $ — $ — $ (103,238 ) $ (103,238 ) The following summarizes gains and losses, including OTTI, that were recognized in the statement of income: Three Months Ended March 31, 2016 March 31, 2015 (In thousands) Gross gains Gross losses Gross gains Gross losses Investment securities: Held-to-maturity $ — $ — $ 1 $ — Available-for-sale 30 2 958 1,198 Other noninterest-bearing investments 3,187 3,737 3,595 242 3,217 3,739 4,554 1,440 Net gains (losses) $ (522 ) $ 3,114 Statement of income information: Equity securities gains (losses), net $ (550 ) $ 3,353 Fixed income securities gains (losses), net 28 (239 ) Net gains (losses) $ (522 ) $ 3,114 Interest income by security type is as follows: (In thousands) Three Months Ended Three Months Ended Taxable Nontaxable Total Taxable Nontaxable Total Investment securities: Held-to-maturity $ 2,604 $ 2,726 $ 5,330 $ 3,592 $ 2,862 $ 6,454 Available-for-sale 39,607 1,955 41,562 19,768 653 20,421 Trading 472 — 472 598 — 598 $ 42,683 $ 4,681 $ 47,364 $ 23,958 $ 3,515 $ 27,473 Investment securities with a carrying value of $2.0 billion at March 31, 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 (“VR”), 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 VR requiring divestiture by the Company were certain of its PEIs. Of the recorded PEIs of $134 million at March 31, 2016 , approximately $16 million remain prohibited by the VR. For the first quarter of 2016 , we did not sell any PEIs. We sold a total of approximately $9 million of PEIs during 2015 . All of these sales related to prohibited PEIs. The 2015 sales resulted in insignificant amounts of realized gains or losses. We will dispose of the remaining $16 million of prohibited PEIs before the required deadline. However, the required deadline has been extended to July 21, 2016 from July 21, 2015 and the Federal Reserve has announced its intention to grant banking entities an additional one-year extension to July 21, 2017. See other discussions in Notes 10 and 11. As discussed in Note 11, we have $20 million at March 31, 2016 of unfunded commitments for PEIs, of which approximately $6 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 VR.

Loans And Allowance For Credit

Loans And Allowance For Credit Losses	3 Months Ended
	Mar. 31, 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) March 31, December 31, Loans held for sale $ 108,764 $ 149,880 Commercial: Commercial and industrial $ 13,590,238 $ 13,211,481 Leasing 437,150 441,666 Owner occupied 7,022,429 7,150,028 Municipal 695,436 675,839 Total commercial 21,745,253 21,479,014 Commercial real estate: Construction and land development 1,967,702 1,841,502 Term 8,826,375 8,514,401 Total commercial real estate 10,794,077 10,355,903 Consumer: Home equity credit line 2,432,632 2,416,357 1-4 family residential 5,417,810 5,382,099 Construction and other consumer real estate 401,422 385,240 Bankcard and other revolving plans 438,540 443,780 Other 188,451 187,149 Total consumer 8,878,855 8,814,625 Total loans $ 41,418,185 $ 40,649,542 Loan balances are presented net of unearned income and fees, which amounted to $148.5 million at March 31, 2016 and $150.3 million at December 31, 2015 . Owner occupied and commercial real estate (“CRE”) loans include unamortized premiums of approximately $24.9 million at March 31, 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 $286.8 million at March 31, 2016 and $288.0 million at December 31, 2015 . Loans with a carrying value of approximately $25.3 billion at March 31, 2016 and $19.4 billion at December 31, 2015 have been pledged at the Federal Reserve and various Federal Home Loan Banks (“FHLBs”) as collateral for potential borrowings. We sold loans totaling $273.2 million and $300.4 million for the three months ended March 31, 2016 and 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 $235.7 million and $309.7 million , respectively. The principal balance of sold loans for which we retain servicing was approximately $1.3 billion at both March 31, 2016 and December 31, 2015 . Income from loans sold, excluding servicing, for the three months ended March 31, 2016 and 2015 was $3.0 million and $4.6 million , 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 March 31, 2016. Changes in the allowance for credit losses are summarized as follows: Three Months Ended March 31, 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 45,875 1,701 (5,431 ) 42,145 Adjustment for FDIC-supported/PCI loans — — — — Deductions: Gross loan and lease charge-offs (43,230 ) (975 ) (3,905 ) (48,110 ) Recoveries 7,065 2,994 1,752 11,811 Net loan and lease charge-offs (36,165 ) 2,019 (2,153 ) (36,299 ) Balance at end of period $ 463,987 $ 117,712 $ 30,195 $ 611,894 Reserve for unfunded lending commitments Balance at beginning of period $ 57,696 $ 16,526 $ 616 $ 74,838 Provision credited to earnings (1,429 ) (3,767 ) (616 ) (5,812 ) Balance at end of period $ 56,267 $ 12,759 $ — $ 69,026 Total allowance for credit losses at end of period Allowance for loan losses $ 463,987 $ 117,712 $ 30,195 $ 611,894 Reserve for unfunded lending commitments 56,267 12,759 — 69,026 Total allowance for credit losses $ 520,254 $ 130,471 $ 30,195 $ 680,920 Three Months Ended March 31, 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 24,934 (26,887 ) 459 (1,494 ) Adjustment for FDIC-supported/PCI loans (38 ) (38 ) Deductions: Gross loan and lease charge-offs (15,951 ) (626 ) (3,611 ) (20,188 ) Recoveries 20,613 14,119 2,338 37,070 Net loan and lease charge-offs 4,662 13,493 (1,273 ) 16,882 Balance at end of period $ 442,072 $ 131,615 $ 46,326 $ 620,013 Reserve for unfunded lending commitments Balance at beginning of period $ 58,931 $ 21,517 $ 628 $ 81,076 Provision charged (credited) to earnings 3,844 (2,580 ) (53 ) 1,211 Balance at end of period $ 62,775 $ 18,937 $ 575 $ 82,287 Total allowance for credit losses at end of period Allowance for loan losses $ 442,072 $ 131,615 $ 46,326 $ 620,013 Reserve for unfunded lending commitments 62,775 18,937 575 82,287 Total allowance for credit losses $ 504,847 $ 150,552 $ 46,901 $ 702,300 The ALLL and outstanding loan balances according to the Company’s impairment method are summarized as follows: March 31, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses: Individually evaluated for impairment $ 76,987 $ 3,047 $ 7,230 $ 87,264 Collectively evaluated for impairment 386,943 114,448 22,882 524,273 Purchased loans with evidence of credit deterioration 57 217 83 357 Total $ 463,987 $ 117,712 $ 30,195 $ 611,894 Outstanding loan balances: Individually evaluated for impairment $ 477,363 $ 95,784 $ 86,957 $ 660,104 Collectively evaluated for impairment 21,219,580 10,649,342 8,782,839 40,651,761 Purchased loans with evidence of credit deterioration 48,310 48,951 9,059 106,320 Total $ 21,745,253 $ 10,794,077 $ 8,878,855 $ 41,418,185 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) March 31, December 31, Commercial: Commercial and industrial $ 356,034 $ 163,906 Leasing 14,107 3,829 Owner occupied 74,369 73,881 Municipal 926 951 Total commercial 445,436 242,567 Commercial real estate: Construction and land development 6,152 7,045 Term 33,051 40,253 Total commercial real estate 39,203 47,298 Consumer: Home equity credit line 10,700 8,270 1-4 family residential 43,791 50,254 Construction and other consumer real estate 645 748 Bankcard and other revolving plans 1,791 537 Other 202 186 Total consumer loans 57,129 59,995 Total $ 541,768 $ 349,860 Past due loans (accruing and nonaccruing) are summarized as follows: March 31, 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 Commercial: Commercial and industrial $ 13,464,106 $ 90,610 $ 35,522 $ 126,132 $ 13,590,238 $ 4,388 $ 287,662 Leasing 436,597 59 494 553 437,150 — 13,613 Owner occupied 6,965,082 21,987 35,360 57,347 7,022,429 13,350 46,289 Municipal 695,436 — — — 695,436 — 926 Total commercial 21,561,221 112,656 71,376 184,032 21,745,253 17,738 348,490 Commercial real estate: Construction and land development 1,960,562 2,573 4,567 7,140 1,967,702 — 1,533 Term 8,782,301 10,173 33,901 44,074 8,826,375 18,295 15,791 Total commercial real estate 10,742,863 12,746 38,468 51,214 10,794,077 18,295 17,324 Consumer: Home equity credit line 2,420,364 7,015 5,253 12,268 2,432,632 — 4,604 1-4 family residential 5,386,087 10,617 21,106 31,723 5,417,810 321 20,131 Construction and other consumer real estate 397,809 3,365 248 3,613 401,422 — 355 Bankcard and other revolving plans 435,092 2,241 1,207 3,448 438,540 848 1,340 Other 187,760 630 61 691 188,451 — 78 Total consumer loans 8,827,112 23,868 27,875 51,743 8,878,855 1,169 26,508 Total $ 41,131,196 $ 149,270 $ 137,719 $ 286,989 $ 41,418,185 $ 37,202 $ 392,322 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 remote. 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: March 31, 2016 (In thousands) Pass Special Mention Sub- standard Doubtful Total loans Total allowance Commercial: Commercial and industrial $ 12,245,903 $ 390,768 $ 953,316 $ 251 $ 13,590,238 Leasing 402,160 7,106 27,884 — 437,150 Owner occupied 6,577,162 156,723 288,544 — 7,022,429 Municipal 678,377 7,888 9,171 — 695,436 Total commercial 19,903,602 562,485 1,278,915 251 21,745,253 $ 463,987 Commercial real estate: Construction and land development 1,921,338 14,540 31,824 — 1,967,702 Term 8,634,484 41,331 150,560 — 8,826,375 Total commercial real estate 10,555,822 55,871 182,384 — 10,794,077 117,712 Consumer: Home equity credit line 2,418,415 — 14,217 — 2,432,632 1-4 family residential 5,368,085 — 49,725 — 5,417,810 Construction and other consumer real estate 399,765 — 1,657 — 401,422 Bankcard and other revolving plans 433,989 — 4,551 — 438,540 Other 188,099 — 352 — 188,451 Total consumer loans 8,808,353 — 70,502 — 8,878,855 30,195 Total $ 39,267,777 $ 618,356 $ 1,531,801 $ 251 $ 41,418,185 $ 611,894 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 months ended March 31, 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 months ended March 31, 2016 and 2015 : March 31, 2016 (In thousands) Unpaid principal balance Recorded investment Total recorded investment Related allowance with no allowance with allowance Commercial: Commercial and industrial $ 457,773 $ 68,388 $ 329,801 $ 398,189 $ 71,962 Owner occupied 124,637 74,158 39,778 113,936 4,162 Municipal 1,405 926 — 926 — Total commercial 583,815 143,472 369,579 513,051 76,124 Commercial real estate: Construction and land development 22,202 4,806 9,319 14,125 883 Term 134,297 81,795 26,275 108,070 1,706 Total commercial real estate 156,499 86,601 35,594 122,195 2,589 Consumer: Home equity credit line 28,148 21,128 4,295 25,423 145 1-4 family residential 66,860 32,652 31,720 64,372 6,805 Construction and other consumer real estate 3,446 988 1,876 2,864 168 Other 2,565 35 1,900 1,935 53 Total consumer loans 101,019 54,803 39,791 94,594 7,171 Total $ 841,333 $ 284,876 $ 444,964 $ 729,840 $ 85,884 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 Three Months Ended (In thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial: Commercial and industrial $ 281,841 $ 1,472 $ 160,013 $ 1,451 Owner occupied 122,241 2,431 177,568 4,092 Municipal 932 — 1,033 — Total commercial 405,014 3,903 338,614 5,543 Commercial real estate: Construction and land development 14,293 513 38,736 569 Term 106,236 3,458 143,496 5,008 Total commercial real estate 120,529 3,971 182,232 5,577 Consumer: Home equity credit line 24,730 386 25,386 413 1-4 family residential 63,166 477 66,711 510 Construction and other consumer real estate 2,917 48 2,560 42 Bankcard and other revolving plans — 16 2 100 Other 2,502 107 4,748 285 Total consumer loans 93,315 1,034 99,407 1,350 Total $ 618,858 $ 8,908 $ 620,253 $ 12,470 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 class and modification type is summarized in the following schedules: March 31, 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 $ 198 $ 26,309 $ 12 $ 91 $ 1,085 $ 33,894 $ 61,589 Owner occupied 2,227 1,458 920 — 7,882 16,318 28,805 Total commercial 2,425 27,767 932 91 8,967 50,212 90,394 Commercial real estate: Construction and land development 44 — — — — 9,316 9,360 Term 4,660 7,397 161 980 4,037 13,749 30,984 Total commercial real estate 4,704 7,397 161 980 4,037 23,065 40,344 Consumer: Home equity credit line 198 2,414 10,570 — 164 3,027 16,373 1-4 family residential 2,030 349 6,498 257 3,213 33,404 45,751 Construction and other consumer real estate 171 357 — 1,143 — 949 2,620 Total consumer loans 2,399 3,120 17,068 1,400 3,377 37,380 64,744 Total accruing 9,528 38,284 18,161 2,471 16,381 110,657 195,482 Nonaccruing Commercial: Commercial and industrial 26 396 — 1,116 18,551 63,047 83,136 Owner occupied 1,122 1,209 — 3,064 275 16,881 22,551 Municipal — 926 — — — — 926 Total commercial 1,148 2,531 — 4,180 18,826 79,928 106,613 Commercial real estate: Construction and land development — 312 — — 3,135 209 3,656 Term 1,797 1,163 — — 2,920 3,892 9,772 Total commercial real estate 1,797 1,475 — — 6,055 4,101 13,428 Consumer: Home equity credit line — 299 1,359 51 — 705 2,414 1-4 family residential — 325 1,944 302 829 6,452 9,852 Construction and other consumer real estate — 97 16 42 — 62 217 Total consumer loans — 721 3,319 395 829 7,219 12,483 Total nonaccruing 2,945 4,727 3,319 4,575 25,710 91,248 132,524 Total $ 12,473 $ 43,011 $ 21,480 $ 7,046 $ 42,091 $ 201,905 $ 328,006 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 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 Constructio

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	3 Months Ended
	Mar. 31, 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 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 March 31, 2016 , we estimate that an additional $7.7 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. They 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 March 31, 2016 , the fair value of our derivative liabilities was $104.5 million , for which we were required to pledge cash collateral of approximately $86.0 million in the normal course of business. If our credit rating were downgraded one notch by either Standard & Poor’s or Moody’s at March 31, 2016 , the additional amount of collateral we could be required to pledge is approximately $1.9 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 March 31, 2016 and December 31, 2015 , and the related gain (loss) of derivative instruments for the three months ended March 31, 2016 and 2015 is summarized as follows: March 31, 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 $ 22,218 $ — $ 1,387,500 $ 5,461 $ 956 Total derivatives designated as hedging instruments 1,387,500 22,218 — 1,387,500 5,461 956 Derivatives not designated as hedging instruments Interest rate swaps and forwards 103,989 740 250 40,314 — 8 Interest rate swaps for customers 1 3,449,818 84,684 89,771 3,256,190 51,353 53,843 Foreign exchange 349,891 17,721 14,448 463,064 20,824 17,761 Total derivatives not designated as hedging instruments 3,903,698 103,145 104,469 3,759,568 72,177 71,612 Total derivatives $ 5,291,198 $ 125,363 $ 104,469 $ 5,147,068 $ 77,638 $ 72,568 1 Notional amounts include both the customer swaps and the offsetting derivative contracts. Three Months Ended March 31, 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 Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ 20,696 $ 2,997 20,696 2,997 Fair value hedges: Terminated swaps on long-term debt $ — Total derivatives designated as hedging instruments 20,696 2,997 — Derivatives not designated as hedging instruments Interest rate swaps and forward contracts $ 235 Interest rate swaps for customers (509 ) Foreign exchange 2,236 Total derivatives not designated as hedging instruments 1,962 Total derivatives $ 20,696 $ 2,997 $ 1,962 $ — Three Months Ended March 31, 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 Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ 4,253 $ 1,016 4,253 1,016 Fair value hedges: Terminated swaps on long-term debt $ 468 Total derivatives designated as hedging instruments 4,253 1,016 468 Derivatives not designated as hedging instruments Interest rate swaps for customers $ 517 Futures contracts 1 Foreign exchange 2,735 Total derivatives not designated as hedging instruments 3,253 Total derivatives $ 4,253 $ 1,016 $ 3,253 $ 468 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 months ended March 31 , of $3.0 million in 2016 , and $1.0 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 $5.1 million and $3.3 million at March 31 , 2016 and 2015 , respectively. The adjustment for derivative liabilities was not significant at March 31 , 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	3 Months Ended
	Mar. 31, 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) March 31, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,262 246,170 Senior notes 390,367 400,334 Capital lease obligations 869 912 Total $ 802,448 $ 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. Preferred Stock On April 25, 2016, the Company launched a tender offer to purchase up to $120 million par amount of certain outstanding preferred stock. The tender offer will expire on May 20, 2016 . 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 Three Months Ended March 31, 2016 Balance at December 31, 2015 $ (18,369 ) $ 1,546 $ (37,789 ) $ (54,612 ) Other comprehensive income (loss) before reclassifications, net of tax 32,168 13,331 (665 ) 44,834 Amounts reclassified from AOCI, net of tax (17 ) (1,858 ) — (1,875 ) Other comprehensive income (loss) 32,151 11,473 (665 ) 42,959 Balance at March 31, 2016 $ 13,782 $ 13,019 $ (38,454 ) $ (11,653 ) Income tax expense included in other comprehensive income (loss) $ 20,192 $ 6,920 $ 665 $ 27,777 Three Months Ended March 31, 2015 Balance at December 31, 2014 $ (91,921 ) $ 2,226 $ (38,346 ) $ (128,041 ) Other comprehensive income before reclassifications, net of tax 11,424 2,189 — 13,613 Amounts reclassified from AOCI, net of tax 148 (629 ) — (481 ) Other comprehensive income 11,572 1,560 — 13,132 Balance at March 31, 2015 $ (80,349 ) $ 3,786 $ (38,346 ) $ (114,909 ) Income tax expense included in other comprehensive income $ 6,957 $ 1,088 $ — $ 8,045 Amounts reclassified from AOCI 1 Statement of income (SI) Balance sheet (BS) (In thousands) Three Months Ended Details about AOCI components 2016 2015 Affected line item Net realized gains (losses) on investment securities $ 28 $ (239 ) SI Fixed income securities gains (losses), net Income tax expense (benefit) 11 (91 ) 17 (148 ) Net unrealized gains on derivative instruments $ 2,997 $ 1,016 SI Interest and fees on loans Income tax expense 1,139 387 $ 1,858 $ 629 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	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The effective income tax rate of 31.4% for the first quarter of 2016 was lower than the 2015 first quarter rate of 35.7% . The tax rates for both the first quarter of 2016 and 2015 were benefited primarily by the non-taxability of certain income items. However, the 2016 effective tax rate was further benefited by the release of various uncertain state tax positions. Net deferred tax assets were approximately $180 million at March 31, 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 March 31, 2016 .

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 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 90% 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 London Interbank Offered Rate (“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 VR. 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) March 31, 2016 Level 1 Level 2 Level 3 Total ASSETS Investment securities: Available-for-sale: U.S. Treasury, agencies and corporations $ — $ 8,027,667 $ — $ 8,027,667 Municipal securities 556,073 556,073 Other debt securities 21,909 21,909 Money market mutual funds and other 59,925 36,311 96,236 59,925 8,641,960 — 8,701,885 Trading account 65,838 65,838 Other noninterest-bearing investments: Bank-owned life insurance 489,297 489,297 Private equity investments 119,222 119,222 Other assets: Agriculture loan servicing and interest-only strips 17,067 17,067 Deferred compensation plan assets 82,179 82,179 Derivatives: Interest rate swaps and forwards 22,958 22,958 Interest rate swaps for customers 84,684 84,684 Foreign currency exchange contracts 17,721 17,721 17,721 107,642 — 125,363 $ 159,825 $ 9,304,737 $ 136,289 $ 9,600,851 LIABILITIES Securities sold, not yet purchased $ 6,515 $ — $ — $ 6,515 Other liabilities: Deferred compensation plan obligations 82,179 82,179 Derivatives: Interest rate swaps and forwards 250 250 Interest rate swaps for customers 89,771 89,771 Foreign currency exchange contracts 14,448 14,448 14,448 90,021 — 104,469 $ 103,142 $ 90,021 $ — $ 193,163 (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 March 31, 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 (1,484 ) Equity securities losses, net (2,009 ) Other noninterest income 3,460 Purchases 2,801 368 Sales (36 ) Redemptions and paydowns (77 ) (275 ) Balance at March 31, 2016 $ — $ — $ — $ 119,222 $ 17,067 $ — Level 3 Instruments Three Months Ended March 31, 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 $ 4,786 $ 99,865 $ 12,227 $ (13 ) Net gains (losses) included in: Statement of income: Accretion of purchase discount on securities available-for-sale 2 257 Dividends and other investment income 1,074 Equity securities gains, net 3,253 Fixed income securities gains (losses), net 31 (323 ) Other noninterest income 4 Other noninterest expense 13 Other comprehensive income (loss) 127 (6,949 ) 42 Fair value of HTM securities transferred to AFS 57,308 Purchases 5,052 171 Sales (2,613 ) (1,517 ) Redemptions and paydowns (1,859 ) (2,349 ) (2 ) (279 ) (401 ) Balance at March 31, 2015 $ 2,465 $ 438,338 $ 4,826 $ 107,448 $ 12,001 $ — No transfers of assets or liabilities occurred among Levels 1, 2 or 3 for the three months ended March 31, 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 2016 2015 Fixed income securities losses, net $ — $ (292 ) 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 March 31, 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 — 32,162 — 32,162 — 10,991 — 10,991 Other real estate owned — 1,695 — 1,695 — 2,388 — 2,388 $ — $ 33,857 $ 1,477 $ 35,334 $ — $ 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 2016 2015 ASSETS Private equity investments, carried at cost $ (342 ) $ (1,153 ) Impaired loans (14,728 ) (2,924 ) Other real estate owned (37 ) (1,008 ) $ (15,107 ) $ (5,085 ) During the three months ended March 31, we recognized net gains of $1.8 million in 2016 and $0.7 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 $2.1 million and $4.1 million , 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 $23.2 million at March 31, 2016 and $25.3 million at December 31, 2015 . Amounts of other noninterest-bearing investments carried at cost were $196.6 million at March 31, 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: March 31, 2016 December 31, 2015 (In thousands) Carrying value Estimated fair value Level Carrying value Estimated fair value Level Financial assets: HTM investment securities $ 631,646 $ 636,484 2 $ 545,648 $ 552,088 2 Loans and leases (including loans held for sale), net of allowance 40,915,055 40,715,842 3 40,193,374 39,535,365 3 Financial liabilities: Time deposits 2,071,688 2,075,729 2 2,130,680 2,129,742 2 Foreign deposits 219,899 219,836 2 294,391 294,321 2 Long-term debt (less fair value hedges) 802,448 831,621 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, and 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. At March 31, 2016 and December 31, 2015, oil and gas-related loan fair value measurements incorporated an illiquidity risk premium in addition to credit and interest rate risk adjustments. 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	3 Months Ended
	Mar. 31, 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) March 31, December 31, Net unfunded commitments to extend credit 1 $ 17,310,427 $ 17,169,785 Standby letters of credit: Financial 643,514 661,554 Performance 203,657 216,843 Commercial letters of credit 58,567 18,447 Total unfunded lending commitments $ 18,216,165 $ 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 March 31, 2016 , the Company had recorded approximately $5.1 million as a liability for the guarantees associated with the standby letters of credit, which consisted of $2.1 million attributable to the RULC and $3.0 million of deferred commitment fees. At March 31, 2016 , the Parent has guaranteed $165 million of debt of affiliated trusts issuing trust preferred securities. At March 31, 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 March 31, 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 our banking relationships with customers that allegedly engaged in wrongful telemarketing practices. The plaintiff is seeking a trebled monetary award under the federal RICO Act. In the third quarter of 2013, the District Court denied the plaintiff’s motion for class certification in the Reyes case. The plaintiff appealed the District Court decision to the Third Circuit Court of Appeals. In the third quarter of 2015, the Third Circuit vacated the District Court’s decision denying class certification and remanded the matter to the District Court with instructions to reconsider the class certification determination in light of particular standards articulated by the Third Circuit in its opinion. A class certification hearing is currently scheduled for late May 2016. Following the Third Circuit’s decision, the parties participated in a number of mediation sessions, which could result in a settlement. Any such settlement would be subject to court approval. 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 governmental inquiry into our payment processing practices relating primarily to certain allegedly fraudulent telemarketers and other customer types (conducted by the Department of Justice). Similar inquiries directed towards banks unrelated to us have resulted in a number of enforcement actions. 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 civil suit, Liu Aifang, et al. v. Velocity VIII, et al. , 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 and that the bank aided and abetted the promoter customers’ conversion of the investors’ funds deposited with us. Discovery is ongoing and trial is scheduled for September 2016. 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 March 31, 2016 , we estimated that the aggregate range of reasonably possible losses for those matters to be from $0 million to roughly $60 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	3 Months Ended
	Mar. 31, 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 (In thousands) Three Months Ended March 31, 2016 2015 2016 2015 2016 2015 Service cost $ — $ — $ — $ — $ 5 $ 8 Interest cost 1,762 1,783 100 101 10 10 Expected return on plan assets (2,754 ) (3,090 ) — — — — Amortization of net actuarial (gain) loss 1,659 1,574 31 31 (17 ) (13 ) Net periodic benefit cost (credit) $ 667 $ 267 $ 131 $ 132 $ (2 ) $ 5 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	3 Months Ended
	Mar. 31, 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. 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 March 31, 2016 , Zions Bank operates 99 branches in Utah, 24 branches in Idaho, and one branch in Wyoming. Amegy operates 76 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 March 31, 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 $ 153.3 $ 152.0 $ 119.2 $ 117.8 $ 108.1 $ 103.8 $ 46.8 $ 44.2 $ 30.9 $ 31.1 Provision for loan losses (30.6 ) (4.6 ) 104.5 11.1 (3.1 ) (4.1 ) 1.9 0.8 (25.6 ) (8.7 ) Net interest income after provision for loan losses 183.9 156.6 14.7 106.7 111.2 107.9 44.9 43.4 56.5 39.8 Noninterest income 36.0 31.5 29.1 29.2 16.1 14.2 9.5 8.2 9.5 8.9 Noninterest expense 97.0 107.5 85.6 93.0 68.5 74.1 32.4 37.2 30.8 32.6 Net Income (loss) before taxes $ 122.9 $ 80.6 $ (41.8 ) $ 42.9 $ 58.8 $ 48.0 $ 22.0 $ 14.4 $ 35.2 $ 16.1 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,306 $ 12,101 $ 10,370 $ 10,276 $ 8,905 $ 8,502 $ 3,863 $ 3,764 $ 2,263 $ 2,384 Total deposits 15,700 15,787 11,274 11,524 10,479 9,701 4,445 4,178 4,005 3,755 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 30.5 $ 28.5 $ 9.4 $ 8.4 $ (45.4 ) $ (68.4 ) $ 452.8 $ 417.4 Provision for loan losses (3.2 ) 3.9 (1.8 ) 0.2 — (0.1 ) 42.1 (1.5 ) Net interest income after provision for loan losses 33.7 24.6 11.2 8.2 (45.4 ) (68.3 ) 410.7 418.9 Noninterest income 5.8 5.0 0.9 0.9 9.9 19.4 116.8 117.3 Noninterest expense 21.4 24.0 5.0 7.8 54.9 16.8 395.6 393.0 Net Income (loss) before taxes $ 18.1 $ 5.6 $ 7.1 $ 1.3 $ (90.4 ) $ (65.7 ) $ 131.9 $ 143.2 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,453 $ 2,358 $ 733 $ 713 $ 110 $ 81 $ 41,003 $ 40,179 Total deposits 2,759 2,456 953 830 (60 ) (747 ) 49,555 47,484

Basis of Presentaion Organizati

Basis of Presentaion Organization and Presentation (Policies)	3 Months Ended
	Mar. 31, 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 months ended March 31, 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)	3 Months Ended
	Mar. 31, 2016
Supplemental Cash Flow Information [Abstract]
Schedule of Other Significant Noncash Transactions [Table Text Block]	(In thousands) Three Months Ended 2016 2015 Loans and leases transferred to other real estate owned $ 5,998 $ 3,568 Loans held for sale reclassified as loans held for investment 1,976 13,138 Amortized cost of HTM securities reclassified as AFS securities — 79,276

Offsetting Assets and Liabili24

Offsetting Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2016
Offsetting Assets and Liabilities [Abstract]
Fair Value, by Balance Sheet Grouping [Table Text Block]	March 31, 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 $ 1,587,212 $ — $ 1,587,212 $ — $ — $ 1,587,212 Derivatives (included in other assets) 125,363 — 125,363 (22,322 ) — 103,041 $ 1,712,575 $ — $ 1,712,575 $ (22,322 ) $ — $ 1,690,253 Liabilities: Federal funds and other short-term borrowings $ 232,188 $ — $ 232,188 $ — $ — $ 232,188 Derivatives (included in other liabilities) 104,469 — 104,469 (22,322 ) (71,149 ) 10,998 $ 336,657 $ — $ 336,657 $ (22,322 ) $ (71,149 ) $ 243,186 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 (5,916 ) 71,722 $ 697,396 $ — $ 697,396 $ (5,916 ) $ — $ 691,480 Liabilities: Federal funds and other short-term borrowings $ 346,987 $ — $ 346,987 $ — $ — $ 346,987 Derivatives (included in other liabilities) 72,568 — 72,568 (5,916 ) (61,134 ) 5,518 $ 419,555 $ — $ 419,555 $ (5,916 ) $ (61,134 ) $ 352,505 March 31, 2016 December 31, 2015 (In thousands) Carrying value Estimated fair value Level Carrying value Estimated fair value Level Financial assets: HTM investment securities $ 631,646 $ 636,484 2 $ 545,648 $ 552,088 2 Loans and leases (including loans held for sale), net of allowance 40,915,055 40,715,842 3 40,193,374 39,535,365 3 Financial liabilities: Time deposits 2,071,688 2,075,729 2 2,130,680 2,129,742 2 Foreign deposits 219,899 219,836 2 294,391 294,321 2 Long-term debt (less fair value hedges) 802,448 831,621 2 812,366 838,796 2

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Summary Of Investment Securities	March 31, 2016 (In thousands) Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair value Held-to-maturity Municipal securities $ 631,646 $ 11,519 $ 6,681 $ 636,484 Available-for-sale U.S. Government agencies and corporations: Agency securities 1,497,652 14,055 856 1,510,851 Agency guaranteed mortgage-backed securities 4,487,279 17,801 9,091 4,495,989 Small Business Administration loan-backed securities 2,019,668 14,480 13,321 2,020,827 Municipal securities 552,872 4,391 1,190 556,073 Other debt securities 25,434 147 3,672 21,909 8,582,905 50,874 28,130 8,605,649 Money market mutual funds and other 96,132 104 — 96,236 8,679,037 50,978 28,130 8,701,885 Total $ 9,310,683 $ 62,497 $ 34,811 $ 9,338,369 December 31, 2015 (In thousands) Amortized cost Gross unrealized gains Gross unrealized losses Estimated fair 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 $ 69,225 $ 69,515 $ 1,187,108 $ 1,189,787 Principal return after one year through five years 238,605 242,328 3,483,268 3,491,732 Principal return after five years through ten years 203,989 207,198 2,769,584 2,781,632 Principal return after ten years 119,827 117,443 1,142,945 1,142,498 $ 631,646 $ 636,484 $ 8,582,905 $ 8,605,649
Summary Of Amount Of Gross Unrealized Losses For Debt Securities And Estimated Fair Value	March 31, 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 $ 5,952 $ 193,737 $ 729 $ 12,480 $ 6,681 $ 206,217 Available-for-sale U.S. Government agencies and corporations: Agency securities 312 299,591 544 129,191 856 428,782 Agency guaranteed mortgage-backed securities 6,836 1,707,106 2,255 149,293 9,091 1,856,399 Small Business Administration loan-backed securities 4,549 539,651 8,772 528,850 13,321 1,068,501 Municipal securities 935 140,612 255 14,231 1,190 154,843 Other — — 3,672 11,331 3,672 11,331 12,632 2,686,960 15,498 832,896 28,130 3,519,856 Mutual funds and other — — — — — — 12,632 2,686,960 15,498 832,896 28,130 3,519,856 Total $ 18,584 $ 2,880,697 $ 16,227 $ 845,376 $ 34,811 $ 3,726,073	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 Three Months Ended HTM AFS Total HTM AFS Total Balance of credit-related OTTI at beginning of period $ — $ — $ — $ (9,079 ) $ (95,472 ) $ (104,551 ) Reductions for securities sold or paid off during the period — — — — 1,313 1,313 Reclassification of securities from HTM to AFS — — — 9,079 (9,079 ) — Balance of credit-related OTTI at end of period $ — $ — $ — $ — $ (103,238 ) $ (103,238 )
Gains And Losses, Including OTTI, Recognized In Statement Of Income	Three Months Ended March 31, 2016 March 31, 2015 (In thousands) Gross gains Gross losses Gross gains Gross losses Investment securities: Held-to-maturity $ — $ — $ 1 $ — Available-for-sale 30 2 958 1,198 Other noninterest-bearing investments 3,187 3,737 3,595 242 3,217 3,739 4,554 1,440 Net gains (losses) $ (522 ) $ 3,114 Statement of income information: Equity securities gains (losses), net $ (550 ) $ 3,353 Fixed income securities gains (losses), net 28 (239 ) Net gains (losses) $ (522 ) $ 3,114
Tax and Nontaxable Interest Income by Investment Type [Table Text Block]	(In thousands) Three Months Ended Three Months Ended Taxable Nontaxable Total Taxable Nontaxable Total Investment securities: Held-to-maturity $ 2,604 $ 2,726 $ 5,330 $ 3,592 $ 2,862 $ 6,454 Available-for-sale 39,607 1,955 41,562 19,768 653 20,421 Trading 472 — 472 598 — 598 $ 42,683 $ 4,681 $ 47,364 $ 23,958 $ 3,515 $ 27,473

Loans And Allowance For Credi26

Loans And Allowance For Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment of accuring and nonaccruing troubled debt restructuring [Text Block]	Three Months Ended Three Months Ended (In thousands) Accruing Nonaccruing Total Accruing Nonaccruing Total Commercial: Commercial and industrial $ — $ 2,992 $ 2,992 $ — $ 44 $ 44 Owner occupied 3,350 244 3,594 — 986 986 Total commercial 3,350 3,236 6,586 — 1,030 1,030 Commercial real estate: Construction and land development — — — — 1,284 1,284 Term — — — — — — Total commercial real estate — — — — 1,284 1,284 Consumer: Home equity credit line — — — — — — 1-4 family residential — 160 160 110 — 110 Construction and other consumer real estate — — — — — — Total consumer loans — 160 160 110 — 110 Total $ 3,350 $ 3,396 $ 6,746 $ 110 $ 2,314 $ 2,424 Note: Total loans modified as TDRs during the 12 months previous to March 31, 2016 and 2015 were $180.3 million and $74.5 million , respectively.
Quantitative Information about Transferred Financial Assets that have been Derecognized and Other Financial Assets Managed Together [Table Text Block]	(In billions) March 31, December 31, Loan Servicing Assets $ 1.3 $ 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: March 31, 2016 (In thousands) Commercial Commercial real estate Consumer Total Allowance for loan losses: Individually evaluated for impairment $ 76,987 $ 3,047 $ 7,230 $ 87,264 Collectively evaluated for impairment 386,943 114,448 22,882 524,273 Purchased loans with evidence of credit deterioration 57 217 83 357 Total $ 463,987 $ 117,712 $ 30,195 $ 611,894 Outstanding loan balances: Individually evaluated for impairment $ 477,363 $ 95,784 $ 86,957 $ 660,104 Collectively evaluated for impairment 21,219,580 10,649,342 8,782,839 40,651,761 Purchased loans with evidence of credit deterioration 48,310 48,951 9,059 106,320 Total $ 21,745,253 $ 10,794,077 $ 8,878,855 $ 41,418,185 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) March 31, December 31, Loans held for sale $ 108,764 $ 149,880 Commercial: Commercial and industrial $ 13,590,238 $ 13,211,481 Leasing 437,150 441,666 Owner occupied 7,022,429 7,150,028 Municipal 695,436 675,839 Total commercial 21,745,253 21,479,014 Commercial real estate: Construction and land development 1,967,702 1,841,502 Term 8,826,375 8,514,401 Total commercial real estate 10,794,077 10,355,903 Consumer: Home equity credit line 2,432,632 2,416,357 1-4 family residential 5,417,810 5,382,099 Construction and other consumer real estate 401,422 385,240 Bankcard and other revolving plans 438,540 443,780 Other 188,451 187,149 Total consumer 8,878,855 8,814,625 Total loans $ 41,418,185 $ 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 March 31, 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 45,875 1,701 (5,431 ) 42,145 Adjustment for FDIC-supported/PCI loans — — — — Deductions: Gross loan and lease charge-offs (43,230 ) (975 ) (3,905 ) (48,110 ) Recoveries 7,065 2,994 1,752 11,811 Net loan and lease charge-offs (36,165 ) 2,019 (2,153 ) (36,299 ) Balance at end of period $ 463,987 $ 117,712 $ 30,195 $ 611,894 Reserve for unfunded lending commitments Balance at beginning of period $ 57,696 $ 16,526 $ 616 $ 74,838 Provision credited to earnings (1,429 ) (3,767 ) (616 ) (5,812 ) Balance at end of period $ 56,267 $ 12,759 $ — $ 69,026 Total allowance for credit losses at end of period Allowance for loan losses $ 463,987 $ 117,712 $ 30,195 $ 611,894 Reserve for unfunded lending commitments 56,267 12,759 — 69,026 Total allowance for credit losses $ 520,254 $ 130,471 $ 30,195 $ 680,920 Three Months Ended March 31, 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 24,934 (26,887 ) 459 (1,494 ) Adjustment for FDIC-supported/PCI loans (38 ) (38 ) Deductions: Gross loan and lease charge-offs (15,951 ) (626 ) (3,611 ) (20,188 ) Recoveries 20,613 14,119 2,338 37,070 Net loan and lease charge-offs 4,662 13,493 (1,273 ) 16,882 Balance at end of period $ 442,072 $ 131,615 $ 46,326 $ 620,013 Reserve for unfunded lending commitments Balance at beginning of period $ 58,931 $ 21,517 $ 628 $ 81,076 Provision charged (credited) to earnings 3,844 (2,580 ) (53 ) 1,211 Balance at end of period $ 62,775 $ 18,937 $ 575 $ 82,287 Total allowance for credit losses at end of period Allowance for loan losses $ 442,072 $ 131,615 $ 46,326 $ 620,013 Reserve for unfunded lending commitments 62,775 18,937 575 82,287 Total allowance for credit losses $ 504,847 $ 150,552 $ 46,901 $ 702,300
Summary Of Nonaccrual Loans	Nonaccrual loans are summarized as follows: (In thousands) March 31, December 31, Commercial: Commercial and industrial $ 356,034 $ 163,906 Leasing 14,107 3,829 Owner occupied 74,369 73,881 Municipal 926 951 Total commercial 445,436 242,567 Commercial real estate: Construction and land development 6,152 7,045 Term 33,051 40,253 Total commercial real estate 39,203 47,298 Consumer: Home equity credit line 10,700 8,270 1-4 family residential 43,791 50,254 Construction and other consumer real estate 645 748 Bankcard and other revolving plans 1,791 537 Other 202 186 Total consumer loans 57,129 59,995 Total $ 541,768 $ 349,860
Summary Of Past Due Loans (Accruing And Nonaccruing)	Past due loans (accruing and nonaccruing) are summarized as follows: March 31, 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 Commercial: Commercial and industrial $ 13,464,106 $ 90,610 $ 35,522 $ 126,132 $ 13,590,238 $ 4,388 $ 287,662 Leasing 436,597 59 494 553 437,150 — 13,613 Owner occupied 6,965,082 21,987 35,360 57,347 7,022,429 13,350 46,289 Municipal 695,436 — — — 695,436 — 926 Total commercial 21,561,221 112,656 71,376 184,032 21,745,253 17,738 348,490 Commercial real estate: Construction and land development 1,960,562 2,573 4,567 7,140 1,967,702 — 1,533 Term 8,782,301 10,173 33,901 44,074 8,826,375 18,295 15,791 Total commercial real estate 10,742,863 12,746 38,468 51,214 10,794,077 18,295 17,324 Consumer: Home equity credit line 2,420,364 7,015 5,253 12,268 2,432,632 — 4,604 1-4 family residential 5,386,087 10,617 21,106 31,723 5,417,810 321 20,131 Construction and other consumer real estate 397,809 3,365 248 3,613 401,422 — 355 Bankcard and other revolving plans 435,092 2,241 1,207 3,448 438,540 848 1,340 Other 187,760 630 61 691 188,451 — 78 Total consumer loans 8,827,112 23,868 27,875 51,743 8,878,855 1,169 26,508 Total $ 41,131,196 $ 149,270 $ 137,719 $ 286,989 $ 41,418,185 $ 37,202 $ 392,322 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	March 31, 2016 (In thousands) Pass Special Mention Sub- standard Doubtful Total loans Total allowance Commercial: Commercial and industrial $ 12,245,903 $ 390,768 $ 953,316 $ 251 $ 13,590,238 Leasing 402,160 7,106 27,884 — 437,150 Owner occupied 6,577,162 156,723 288,544 — 7,022,429 Municipal 678,377 7,888 9,171 — 695,436 Total commercial 19,903,602 562,485 1,278,915 251 21,745,253 $ 463,987 Commercial real estate: Construction and land development 1,921,338 14,540 31,824 — 1,967,702 Term 8,634,484 41,331 150,560 — 8,826,375 Total commercial real estate 10,555,822 55,871 182,384 — 10,794,077 117,712 Consumer: Home equity credit line 2,418,415 — 14,217 — 2,432,632 1-4 family residential 5,368,085 — 49,725 — 5,417,810 Construction and other consumer real estate 399,765 — 1,657 — 401,422 Bankcard and other revolving plans 433,989 — 4,551 — 438,540 Other 188,099 — 352 — 188,451 Total consumer loans 8,808,353 — 70,502 — 8,878,855 30,195 Total $ 39,267,777 $ 618,356 $ 1,531,801 $ 251 $ 41,418,185 $ 611,894 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	March 31, 2016 (In thousands) Unpaid principal balance Recorded investment Total recorded investment Related allowance with no allowance with allowance Commercial: Commercial and industrial $ 457,773 $ 68,388 $ 329,801 $ 398,189 $ 71,962 Owner occupied 124,637 74,158 39,778 113,936 4,162 Municipal 1,405 926 — 926 — Total commercial 583,815 143,472 369,579 513,051 76,124 Commercial real estate: Construction and land development 22,202 4,806 9,319 14,125 883 Term 134,297 81,795 26,275 108,070 1,706 Total commercial real estate 156,499 86,601 35,594 122,195 2,589 Consumer: Home equity credit line 28,148 21,128 4,295 25,423 145 1-4 family residential 66,860 32,652 31,720 64,372 6,805 Construction and other consumer real estate 3,446 988 1,876 2,864 168 Other 2,565 35 1,900 1,935 53 Total consumer loans 101,019 54,803 39,791 94,594 7,171 Total $ 841,333 $ 284,876 $ 444,964 $ 729,840 $ 85,884 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 Three Months Ended (In thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial: Commercial and industrial $ 281,841 $ 1,472 $ 160,013 $ 1,451 Owner occupied 122,241 2,431 177,568 4,092 Municipal 932 — 1,033 — Total commercial 405,014 3,903 338,614 5,543 Commercial real estate: Construction and land development 14,293 513 38,736 569 Term 106,236 3,458 143,496 5,008 Total commercial real estate 120,529 3,971 182,232 5,577 Consumer: Home equity credit line 24,730 386 25,386 413 1-4 family residential 63,166 477 66,711 510 Construction and other consumer real estate 2,917 48 2,560 42 Bankcard and other revolving plans — 16 2 100 Other 2,502 107 4,748 285 Total consumer loans 93,315 1,034 99,407 1,350 Total $ 618,858 $ 8,908 $ 620,253 $ 12,470
Summary Of Selected Information On TDRs That Includes Recorded Investment On An Accruing And Nonaccruing Basis By Loan Class And Modification Type	March 31, 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 $ 198 $ 26,309 $ 12 $ 91 $ 1,085 $ 33,894 $ 61,589 Owner occupied 2,227 1,458 920 — 7,882 16,318 28,805 Total commercial 2,425 27,767 932 91 8,967 50,212 90,394 Commercial real estate: Construction and land development 44 — — — — 9,316 9,360 Term 4,660 7,397 161 980 4,037 13,749 30,984 Total commercial real estate 4,704 7,397 161 980 4,037 23,065 40,344 Consumer: Home equity credit line 198 2,414 10,570 — 164 3,027 16,373 1-4 family residential 2,030 349 6,498 257 3,213 33,404 45,751 Construction and other consumer real estate 171 357 — 1,143 — 949 2,620 Total consumer loans 2,399 3,120 17,068 1,400 3,377 37,380 64,744 Total accruing 9,528 38,284 18,161 2,471 16,381 110,657 195,482 Nonaccruing Commercial: Commercial and industrial 26 396 — 1,116 18,551 63,047 83,136 Owner occupied 1,122 1,209 — 3,064 275 16,881 22,551 Municipal — 926 — — — — 926 Total commercial 1,148 2,531 — 4,180 18,826 79,928 106,613 Commercial real estate: Construction and land development — 312 — — 3,135 209 3,656 Term 1,797 1,163 — — 2,920 3,892 9,772 Total commercial real estate 1,797 1,475 — — 6,055 4,101 13,428 Consumer: Home equity credit line — 299 1,359 51 — 705 2,414 1-4 family residential — 325 1,944 302 829 6,452 9,852 Construction and other consumer real estate — 97 16 42 — 62 217 Total consumer loans — 721 3,319 395 829 7,219 12,483 Total nonaccruing 2,945 4,727 3,319 4,575 25,710 91,248 132,524 Total $ 12,473 $ 43,011 $ 21,480 $ 7,046 $ 42,091 $ 201,905 $ 328,006 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 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 (In thousands) 2016 2015 Commercial: Commercial and industrial $ (73 ) $ (57 ) Owner occupied (49 ) (112 ) Total commercial (122 ) (169 ) Commercial real estate: Construction and land development (1 ) (37 ) Term (79 ) (109 ) Total commercial real estate (80 ) (146 ) Consumer: Home equity credit line (1 ) (1 ) 1-4 family residential (230 ) (271 ) Construction and other consumer real estate (5 ) (7 ) Total consumer loans (236 ) (279 ) Total decrease to interest income 1 $ (438 ) $ (594 ) 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) March 31, 2016 December 31, 2015 Commercial $ 55,997 $ 72,440 Commercial real estate 60,456 65,167 Consumer 9,961 11,082 Outstanding balance $ 126,414 $ 148,689 Carrying amount $ 106,320 $ 125,029 Less ALLL 357 945 Carrying amount, net $ 105,963 $ 124,084
Schedule Of Changes In The Accretable Yield For PCI Loans	(In thousands) Three Months Ended 2016 2015 Balance at beginning of period $ 39,803 $ 45,055 Accretion (6,138 ) (9,583 ) Reclassification from nonaccretable difference 8,430 13,281 Disposals and other 1,010 2,178 Balance at end of period $ 43,105 $ 50,931 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)	3 Months Ended
	Mar. 31, 2016
Summary of Derivative Instruments [Abstract]
Schedule of Derivative Instruments	March 31, 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 $ 22,218 $ — $ 1,387,500 $ 5,461 $ 956 Total derivatives designated as hedging instruments 1,387,500 22,218 — 1,387,500 5,461 956 Derivatives not designated as hedging instruments Interest rate swaps and forwards 103,989 740 250 40,314 — 8 Interest rate swaps for customers 1 3,449,818 84,684 89,771 3,256,190 51,353 53,843 Foreign exchange 349,891 17,721 14,448 463,064 20,824 17,761 Total derivatives not designated as hedging instruments 3,903,698 103,145 104,469 3,759,568 72,177 71,612 Total derivatives $ 5,291,198 $ 125,363 $ 104,469 $ 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 March 31, 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 Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ 20,696 $ 2,997 20,696 2,997 Fair value hedges: Terminated swaps on long-term debt $ — Total derivatives designated as hedging instruments 20,696 2,997 — Derivatives not designated as hedging instruments Interest rate swaps and forward contracts $ 235 Interest rate swaps for customers (509 ) Foreign exchange 2,236 Total derivatives not designated as hedging instruments 1,962 Total derivatives $ 20,696 $ 2,997 $ 1,962 $ — Three Months Ended March 31, 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 Derivatives designated as hedging instruments Cash flow hedges 1 : Interest rate swaps $ 4,253 $ 1,016 4,253 1,016 Fair value hedges: Terminated swaps on long-term debt $ 468 Total derivatives designated as hedging instruments 4,253 1,016 468 Derivatives not designated as hedging instruments Interest rate swaps for customers $ 517 Futures contracts 1 Foreign exchange 2,735 Total derivatives not designated as hedging instruments 3,253 Total derivatives $ 4,253 $ 1,016 $ 3,253 $ 468 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 months ended March 31 , of $3.0 million in 2016 , and $1.0 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)	3 Months Ended
	Mar. 31, 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) March 31, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,262 246,170 Senior notes 390,367 400,334 Capital lease obligations 869 912 Total $ 802,448 $ 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 Details about AOCI components 2016 2015 Affected line item Net realized gains (losses) on investment securities $ 28 $ (239 ) SI Fixed income securities gains (losses), net Income tax expense (benefit) 11 (91 ) 17 (148 ) Net unrealized gains on derivative instruments $ 2,997 $ 1,016 SI Interest and fees on loans Income tax expense 1,139 387 $ 1,858 $ 629 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 Three Months Ended March 31, 2016 Balance at December 31, 2015 $ (18,369 ) $ 1,546 $ (37,789 ) $ (54,612 ) Other comprehensive income (loss) before reclassifications, net of tax 32,168 13,331 (665 ) 44,834 Amounts reclassified from AOCI, net of tax (17 ) (1,858 ) — (1,875 ) Other comprehensive income (loss) 32,151 11,473 (665 ) 42,959 Balance at March 31, 2016 $ 13,782 $ 13,019 $ (38,454 ) $ (11,653 ) Income tax expense included in other comprehensive income (loss) $ 20,192 $ 6,920 $ 665 $ 27,777 Three Months Ended March 31, 2015 Balance at December 31, 2014 $ (91,921 ) $ 2,226 $ (38,346 ) $ (128,041 ) Other comprehensive income before reclassifications, net of tax 11,424 2,189 — 13,613 Amounts reclassified from AOCI, net of tax 148 (629 ) — (481 ) Other comprehensive income 11,572 1,560 — 13,132 Balance at March 31, 2015 $ (80,349 ) $ 3,786 $ (38,346 ) $ (114,909 ) Income tax expense included in other comprehensive income $ 6,957 $ 1,088 $ — $ 8,045

Debt And Shareholders' Equity S

Debt And Shareholders' Equity Schedule of Long-term Debt Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt is summarized as follows: (In thousands) March 31, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,262 246,170 Senior notes 390,367 400,334 Capital lease obligations 869 912 Total $ 802,448 $ 812,366

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis	(In thousands) March 31, 2016 Level 1 Level 2 Level 3 Total ASSETS Investment securities: Available-for-sale: U.S. Treasury, agencies and corporations $ — $ 8,027,667 $ — $ 8,027,667 Municipal securities 556,073 556,073 Other debt securities 21,909 21,909 Money market mutual funds and other 59,925 36,311 96,236 59,925 8,641,960 — 8,701,885 Trading account 65,838 65,838 Other noninterest-bearing investments: Bank-owned life insurance 489,297 489,297 Private equity investments 119,222 119,222 Other assets: Agriculture loan servicing and interest-only strips 17,067 17,067 Deferred compensation plan assets 82,179 82,179 Derivatives: Interest rate swaps and forwards 22,958 22,958 Interest rate swaps for customers 84,684 84,684 Foreign currency exchange contracts 17,721 17,721 17,721 107,642 — 125,363 $ 159,825 $ 9,304,737 $ 136,289 $ 9,600,851 LIABILITIES Securities sold, not yet purchased $ 6,515 $ — $ — $ 6,515 Other liabilities: Deferred compensation plan obligations 82,179 82,179 Derivatives: Interest rate swaps and forwards 250 250 Interest rate swaps for customers 89,771 89,771 Foreign currency exchange contracts 14,448 14,448 14,448 90,021 — 104,469 $ 103,142 $ 90,021 $ — $ 193,163 (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 March 31, 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 (1,484 ) Equity securities losses, net (2,009 ) Other noninterest income 3,460 Purchases 2,801 368 Sales (36 ) Redemptions and paydowns (77 ) (275 ) Balance at March 31, 2016 $ — $ — $ — $ 119,222 $ 17,067 $ — Level 3 Instruments Three Months Ended March 31, 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 $ 4,786 $ 99,865 $ 12,227 $ (13 ) Net gains (losses) included in: Statement of income: Accretion of purchase discount on securities available-for-sale 2 257 Dividends and other investment income 1,074 Equity securities gains, net 3,253 Fixed income securities gains (losses), net 31 (323 ) Other noninterest income 4 Other noninterest expense 13 Other comprehensive income (loss) 127 (6,949 ) 42 Fair value of HTM securities transferred to AFS 57,308 Purchases 5,052 171 Sales (2,613 ) (1,517 ) Redemptions and paydowns (1,859 ) (2,349 ) (2 ) (279 ) (401 ) Balance at March 31, 2015 $ 2,465 $ 438,338 $ 4,826 $ 107,448 $ 12,001 $ —
Schedule Of Realized Gains (Losses) Using Level 3 Inputs	(In thousands) Three Months Ended 2016 2015 Fixed income securities losses, net $ — $ (292 )
Schedule Of Assets With Fair Value Changes On Nonrecurring Basis	(In thousands) Fair value at March 31, 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 — 32,162 — 32,162 — 10,991 — 10,991 Other real estate owned — 1,695 — 1,695 — 2,388 — 2,388 $ — $ 33,857 $ 1,477 $ 35,334 $ — $ 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 2016 2015 ASSETS Private equity investments, carried at cost $ (342 ) $ (1,153 ) Impaired loans (14,728 ) (2,924 ) Other real estate owned (37 ) (1,008 ) $ (15,107 ) $ (5,085 )
Fair Value, by Balance Sheet Grouping [Table Text Block]	March 31, 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 $ 1,587,212 $ — $ 1,587,212 $ — $ — $ 1,587,212 Derivatives (included in other assets) 125,363 — 125,363 (22,322 ) — 103,041 $ 1,712,575 $ — $ 1,712,575 $ (22,322 ) $ — $ 1,690,253 Liabilities: Federal funds and other short-term borrowings $ 232,188 $ — $ 232,188 $ — $ — $ 232,188 Derivatives (included in other liabilities) 104,469 — 104,469 (22,322 ) (71,149 ) 10,998 $ 336,657 $ — $ 336,657 $ (22,322 ) $ (71,149 ) $ 243,186 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 (5,916 ) 71,722 $ 697,396 $ — $ 697,396 $ (5,916 ) $ — $ 691,480 Liabilities: Federal funds and other short-term borrowings $ 346,987 $ — $ 346,987 $ — $ — $ 346,987 Derivatives (included in other liabilities) 72,568 — 72,568 (5,916 ) (61,134 ) 5,518 $ 419,555 $ — $ 419,555 $ (5,916 ) $ (61,134 ) $ 352,505 March 31, 2016 December 31, 2015 (In thousands) Carrying value Estimated fair value Level Carrying value Estimated fair value Level Financial assets: HTM investment securities $ 631,646 $ 636,484 2 $ 545,648 $ 552,088 2 Loans and leases (including loans held for sale), net of allowance 40,915,055 40,715,842 3 40,193,374 39,535,365 3 Financial liabilities: Time deposits 2,071,688 2,075,729 2 2,130,680 2,129,742 2 Foreign deposits 219,899 219,836 2 294,391 294,321 2 Long-term debt (less fair value hedges) 802,448 831,621 2 812,366 838,796 2

Commitments, Guarantees, And 31

Commitments, Guarantees, And Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2016
Guarantees, Commitments And Contingencies [Abstract]
Schedule Of Guarantees Issued	(In thousands) March 31, December 31, Net unfunded commitments to extend credit 1 $ 17,310,427 $ 17,169,785 Standby letters of credit: Financial 643,514 661,554 Performance 203,657 216,843 Commercial letters of credit 58,567 18,447 Total unfunded lending commitments $ 18,216,165 $ 18,066,629

Retirement Plans (Tables)

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 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 (In thousands) Three Months Ended March 31, 2016 2015 2016 2015 2016 2015 Service cost $ — $ — $ — $ — $ 5 $ 8 Interest cost 1,762 1,783 100 101 10 10 Expected return on plan assets (2,754 ) (3,090 ) — — — — Amortization of net actuarial (gain) loss 1,659 1,574 31 31 (17 ) (13 ) Net periodic benefit cost (credit) $ 667 $ 267 $ 131 $ 132 $ (2 ) $ 5

Operating Segment Information (

Operating Segment Information (Tables)	3 Months Ended
	Mar. 31, 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. 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 March 31, 2016 , Zions Bank operates 99 branches in Utah, 24 branches in Idaho, and one branch in Wyoming. Amegy operates 76 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 March 31, 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 $ 153.3 $ 152.0 $ 119.2 $ 117.8 $ 108.1 $ 103.8 $ 46.8 $ 44.2 $ 30.9 $ 31.1 Provision for loan losses (30.6 ) (4.6 ) 104.5 11.1 (3.1 ) (4.1 ) 1.9 0.8 (25.6 ) (8.7 ) Net interest income after provision for loan losses 183.9 156.6 14.7 106.7 111.2 107.9 44.9 43.4 56.5 39.8 Noninterest income 36.0 31.5 29.1 29.2 16.1 14.2 9.5 8.2 9.5 8.9 Noninterest expense 97.0 107.5 85.6 93.0 68.5 74.1 32.4 37.2 30.8 32.6 Net Income (loss) before taxes $ 122.9 $ 80.6 $ (41.8 ) $ 42.9 $ 58.8 $ 48.0 $ 22.0 $ 14.4 $ 35.2 $ 16.1 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,306 $ 12,101 $ 10,370 $ 10,276 $ 8,905 $ 8,502 $ 3,863 $ 3,764 $ 2,263 $ 2,384 Total deposits 15,700 15,787 11,274 11,524 10,479 9,701 4,445 4,178 4,005 3,755 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 30.5 $ 28.5 $ 9.4 $ 8.4 $ (45.4 ) $ (68.4 ) $ 452.8 $ 417.4 Provision for loan losses (3.2 ) 3.9 (1.8 ) 0.2 — (0.1 ) 42.1 (1.5 ) Net interest income after provision for loan losses 33.7 24.6 11.2 8.2 (45.4 ) (68.3 ) 410.7 418.9 Noninterest income 5.8 5.0 0.9 0.9 9.9 19.4 116.8 117.3 Noninterest expense 21.4 24.0 5.0 7.8 54.9 16.8 395.6 393.0 Net Income (loss) before taxes $ 18.1 $ 5.6 $ 7.1 $ 1.3 $ (90.4 ) $ (65.7 ) $ 131.9 $ 143.2 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,453 $ 2,358 $ 733 $ 713 $ 110 $ 81 $ 41,003 $ 40,179 Total deposits 2,759 2,456 953 830 (60 ) (747 ) 49,555 47,484
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 $ 153.3 $ 152.0 $ 119.2 $ 117.8 $ 108.1 $ 103.8 $ 46.8 $ 44.2 $ 30.9 $ 31.1 Provision for loan losses (30.6 ) (4.6 ) 104.5 11.1 (3.1 ) (4.1 ) 1.9 0.8 (25.6 ) (8.7 ) Net interest income after provision for loan losses 183.9 156.6 14.7 106.7 111.2 107.9 44.9 43.4 56.5 39.8 Noninterest income 36.0 31.5 29.1 29.2 16.1 14.2 9.5 8.2 9.5 8.9 Noninterest expense 97.0 107.5 85.6 93.0 68.5 74.1 32.4 37.2 30.8 32.6 Net Income (loss) before taxes $ 122.9 $ 80.6 $ (41.8 ) $ 42.9 $ 58.8 $ 48.0 $ 22.0 $ 14.4 $ 35.2 $ 16.1 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 12,306 $ 12,101 $ 10,370 $ 10,276 $ 8,905 $ 8,502 $ 3,863 $ 3,764 $ 2,263 $ 2,384 Total deposits 15,700 15,787 11,274 11,524 10,479 9,701 4,445 4,178 4,005 3,755 Vectra TCBW Other Consolidated Company 2016 2015 2016 2015 2016 2015 2016 2015 SELECTED INCOME STATEMENT DATA Net interest income $ 30.5 $ 28.5 $ 9.4 $ 8.4 $ (45.4 ) $ (68.4 ) $ 452.8 $ 417.4 Provision for loan losses (3.2 ) 3.9 (1.8 ) 0.2 — (0.1 ) 42.1 (1.5 ) Net interest income after provision for loan losses 33.7 24.6 11.2 8.2 (45.4 ) (68.3 ) 410.7 418.9 Noninterest income 5.8 5.0 0.9 0.9 9.9 19.4 116.8 117.3 Noninterest expense 21.4 24.0 5.0 7.8 54.9 16.8 395.6 393.0 Net Income (loss) before taxes $ 18.1 $ 5.6 $ 7.1 $ 1.3 $ (90.4 ) $ (65.7 ) $ 131.9 $ 143.2 SELECTED AVERAGE BALANCE SHEET DATA Total loans $ 2,453 $ 2,358 $ 733 $ 713 $ 110 $ 81 $ 41,003 $ 40,179 Total deposits 2,759 2,456 953 830 (60 ) (747 ) 49,555 47,484

Basis of Presentaion (Details)

Basis of Presentaion (Details)	Mar. 31, 2016States
Basis Of Presentation [Abstract]
Number of States in which Entity Operates	11

Supplemental Cash Flow Inform35

Supplemental Cash Flow Information (Schedule Of Noncash Activities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Significant Noncash Transactions [Line Items]
Loans and Leases Transfered to Other Real Estate Owned	$ 5,998	$ 3,568
Loans Held for Sale Reclassified as Loans Held For Investment	1,976	13,138
Amortized Cost of HTM Securities Reclassified as AFS Securities	$ 0	$ 79,276

Offsetting Assets and Liabili36

Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 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	$ 1,587,212	$ 619,758
Gross amounts recognized	1,587,212	619,758
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	1,587,212	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	103,041	71,722
Gross amounts recognized	125,363	77,638
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	125,363	77,638
Gross amounts not offset in the balance sheet	(22,322)	$ (5,916)
Cash Collateral Received/Pledged	0
Assets, Total [Member] | Assets [Member]
Offsetting Assets [Line Items]
Net amount	1,690,253	$ 691,480
Gross amounts recognized	1,712,575	697,396
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	1,712,575	697,396
Gross amounts not offset in the balance sheet	(22,322)	(5,916)
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	232,188	346,987
Gross amounts recognized	232,188	346,987
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	232,188	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	10,998	5,518
Gross amounts recognized	104,469	72,568
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	104,469	72,568
Gross amounts not offset in the balance sheet	(22,322)	(5,916)
Cash Collateral Received/Pledged	(71,149)	(61,134)
Liabilities, Total [Member] | Other Liabilities [Member]
Offsetting Assets [Line Items]
Net amount	243,186	352,505
Gross amounts recognized	336,657	419,555
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	336,657	419,555
Gross amounts not offset in the balance sheet	(22,322)	(5,916)
Cash Collateral Received/Pledged	$ (71,149)	$ (61,134)

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Thousands	Mar. 31, 2016USD ($)Securitiesyr	Dec. 31, 2015USD ($)Securities	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)Securities
Investment [Line Items]
Sale of CDO, Amortized Cost			$ 574,000
Held-to-maturity, Amortized cost	$ 631,646
Private equity investments prohibited by Volker rule	$ 16,000
Number of HTM investment securities in an unrealized loss position | Securities	157	187		187
Number of AFS investment securities in an unrealized loss position | Securities	684	709		709
Carrying value of pledged securities	$ 2,000,000	$ 2,300,000		$ 2,300,000
Private Equity Investments	134,000
Realized Losses on Sales of CDOs			(137,000)
Private Equity Investments Sold Prohibited by Volcker Rule				9,000
Commitments for Private Equity and Other Noninterest-bearing Investments	20,000
Commitments for Private Equity or Other Non-Interest Bearing Investments Prohibited by the Volcker Rule	$ 6,000
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	$ 631,646	545,648		$ 545,648
Held To Maturity Securities Gross Unrealized Losses	$ 6,681	$ 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	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015
Investment [Line Items]
Held-to-maturity, Amortized cost	$ 631,646
Available-for-sale Debt Securities, Amortized Cost Basis	8,582,905	$ 7,571,978
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	50,874	27,163
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	28,130	56,661
Available-for-sale debt securities, Estimated fair value	8,605,649	7,542,480
Available-for-sale Securities, Gross Unrealized Gain	50,978	27,224
Available-for-sale, Amortized cost	8,679,037	7,672,590
Available-for-sale, Gross unrealized losses, Recognized in OCI	28,130	56,698
Available-for-sale securities, Estimated fair value	8,701,885	7,643,116
amortized cost of investment securities	9,310,683	8,218,238
Gross Unrealized Gains of Investment Securities Recognized in OCI	62,497	38,442
Gross Unrealized Losses of Investment Securities Recognized in OCI	34,811	61,476
Estimated Fair Value of Investment Securities	9,338,369	8,195,204
Mutual Funds And Stock [Member]
Investment [Line Items]
Available-for-sale Securities, Gross Unrealized Gain	104	61
Available-for-sale, Amortized cost	96,132	100,612
Available-for-sale, Gross unrealized losses, Recognized in OCI	0	37
Available-for-sale securities, Estimated fair value	96,236	100,636
Municipal Securities [Member]
Investment [Line Items]
Held-to-maturity, fair value	636,484	552,088
Held-to-maturity, Amortized cost	631,646	545,648
Available-for-sale Debt Securities, Amortized Cost Basis	552,872	417,374
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	4,391	2,177
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	1,190	856
Available-for-sale debt securities, Estimated fair value	556,073	418,695
Held-to-maturity Securities, Unrecognized Holding Gain	11,519	11,218
Held-to-maturity Securities, Unrecognized Holding Loss	6,681	4,778
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	25,434	25,454
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	3,672	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	147	152
Available-for-sale debt securities, Estimated fair value	21,909	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	1,497,652	1,231,740
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	14,055	4,313
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	856	2,658
Available-for-sale debt securities, Estimated fair value	1,510,851	1,233,395
Agency Guaranteed Mortgage-Backed Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	4,487,279	3,964,593
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	17,801	7,919
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	9,091	36,037
Available-for-sale debt securities, Estimated fair value	4,495,989	3,936,475
Small Business Administration Loan-Backed Securities [Member]
Investment [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	2,019,668	1,932,817
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	14,480	12,602
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	13,321	14,445
Available-for-sale debt securities, Estimated fair value	$ 2,020,827	$ 1,930,974

Investment Securities (Contract

Investment Securities (Contractual Maturities Debt Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments [Abstract]
Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost	$ 69,225
Held-to-maturity, Due in one year or less, Estimated fair value	69,515
Held-to-maturity, Due after one year through five years, Amortized cost	238,605
Held-to-maturity, Due after one year through five years, Estimated fair value	242,328
Held-to-maturity, Due after five years through ten years, Amortized cost	203,989
Held-to-maturity, Due after five years through ten years, Estimated fair value	207,198
Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Amortized Cost	119,827
Held-to-maturity, Due after ten years, Estimated fair value	117,443
Held-to-maturity, Amortized cost	631,646
Held-to-maturity, fair value	636,484
Available-for-sale, Due in one year or less, Amortized cost	1,187,108
Available-for-sale, Due in one year or less, Estimated fair value	1,189,787
Available-for-sale, Due after one year through five years, Amortized cost	3,483,268
Available-for-sale, Due after one year through five years, Estimated fair value	3,491,732
Available-for-sale, Due after five years through ten years, Amortized cost	2,769,584
Available-for-sale, Due after five years through ten years, Estimated fair value	2,781,632
Available-for-sale, Due after ten years, Amortized cost	1,142,945
Available-for-sale, Due after ten years, Estimated fair value	1,142,498
Available-for-sale, Amortized cost	8,582,905	$ 7,571,978
Available-for-sale, Estimated fair value	$ 8,605,649	$ 7,542,480

Investment Securities (Summar40

Investment Securities (Summary Of Amount Of Gross Unrealized Losses For Debt Securities And Estimated Fair Value) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	$ 12,632	$ 42,879
Available-for-sale, Less than 12 months - Estimated fair value	2,686,960	4,904,774
Available-for-sale, 12 months or more - Gross unrealized losses	15,498	13,819
Available-for-sale, 12 months or more - Estimated fair value	832,896	750,132
Available-for-sale, Total - Gross unrealized losses	28,130	56,698
Available-for-sale, Total - Estimated fair value	3,519,856	5,654,906
Investment Securities Gross Unrealized Losses Less Than 12 Months	18,584	47,400
Investment Securities Estimated Fair Value Less Than 12 Months	2,880,697	5,026,971
Investment Securities Gross Unrealized Losses 12 Months or More	16,227	14,076
Investment Securities Estimated Fair Value 12 Months or More	845,376	763,944
Investment Securities Gross Unrealized Losses Total	34,811	61,476
Investment Securities Estimated Fair Value Total	3,726,073	5,790,915
Municipal Securities [Member]
Investment [Line Items]
Held-to-maturity, Less than 12 months - Gross unrealized losses	5,952	4,521
Held-to-maturity, Less than 12 months - Estimated fair value	193,737	122,197
Held-to-maturity, 12 months or more - Gross unrealized losses	729	257
Held-to-maturity, 12 months or more - Estimated fair value	12,480	13,812
Held-to-maturity, Total - Gross unrealized losses	6,681	4,778
Held-to-maturity, Total - Estimated fair value	206,217	136,009
Available-for-sale, Less than 12 months - Gross unrealized losses	935	735
Available-for-sale, Less than 12 months - Estimated fair value	140,612	102,901
Available-for-sale, 12 months or more - Gross unrealized losses	255	121
Available-for-sale, 12 months or more - Estimated fair value	14,231	5,733
Available-for-sale, Total - Gross unrealized losses	1,190	856
Available-for-sale, Total - Estimated fair value	154,843	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	312	2,176
Available-for-sale, Less than 12 months - Estimated fair value	299,591	559,196
Available-for-sale, 12 months or more - Gross unrealized losses	544	482
Available-for-sale, 12 months or more - Estimated fair value	129,191	131,615
Available-for-sale, Total - Gross unrealized losses	856	2,658
Available-for-sale, Total - Estimated fair value	428,782	690,811
Agency Guaranteed Mortgage-Backed Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	6,836	34,583
Available-for-sale, Less than 12 months - Estimated fair value	1,707,106	3,639,824
Available-for-sale, 12 months or more - Gross unrealized losses	2,255	1,454
Available-for-sale, 12 months or more - Estimated fair value	149,293	65,071
Available-for-sale, Total - Gross unrealized losses	9,091	36,037
Available-for-sale, Total - Estimated fair value	1,856,399	3,704,895
Small Business Administration Loan-Backed Securities [Member]
Investment [Line Items]
Available-for-sale, Less than 12 months - Gross unrealized losses	4,549	5,348
Available-for-sale, Less than 12 months - Estimated fair value	539,651	567,365
Available-for-sale, 12 months or more - Gross unrealized losses	8,772	9,097
Available-for-sale, 12 months or more - Estimated fair value	528,850	535,376
Available-for-sale, Total - Gross unrealized losses	13,321	14,445
Available-for-sale, Total - Estimated fair value	1,068,501	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	12,632	42,842
Available-for-sale, Less than 12 months - Estimated fair value	2,686,960	4,869,286
Available-for-sale, 12 months or more - Gross unrealized losses	15,498	13,819
Available-for-sale, 12 months or more - Estimated fair value	832,896	750,132
Available-for-sale, Total - Gross unrealized losses	28,130	56,661
Available-for-sale, Total - Estimated fair value	3,519,856	5,619,418
Available-for-sale Securities [Member] | Municipal Securities [Member]
Investment [Line Items]
Available-for-sale, 12 months or more - Gross unrealized losses	3,672
Available-for-sale, 12 months or more - Estimated fair value	11,331
Available-for-sale, Total - Gross unrealized losses	3,672	2,665
Available-for-sale, Total - Estimated fair value	$ 11,331	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
	Mar. 31, 2016	Mar. 31, 2015
Investment [Line Items]
Balance of credit-related OTTI at beginning of period	$ 0	$ 104,551
Reductions for securities sold during the period	0	1,313
Balance of credit-related OTTI at end of period	0	(103,238)
Transfer of Securities from HTM to AFS	0	0
Held-to-maturity Securities [Member]
Investment [Line Items]
Balance of credit-related OTTI at beginning of period	0	9,079
Reductions for securities sold during the period	0	0
Balance of credit-related OTTI at end of period	0	0
Transfer of Securities from HTM to AFS	0	9,079
Available-for-sale Securities [Member]
Investment [Line Items]
Balance of credit-related OTTI at beginning of period	0	95,472
Reductions for securities sold during the period	0	1,313
Balance of credit-related OTTI at end of period	0	(103,238)
Transfer of Securities from HTM to AFS	$ 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
	Mar. 31, 2016	Mar. 31, 2015
Investments [Abstract]
Investment securities, Held-to-maturity, Gross gains	$ 0	$ 1
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities	0	0
Investment securities, Available-for-sale, Gross gains	30	958
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	2	1,198
Other noninterest-bearing investments, Nonmarketable equity securities, Gross gains	3,187	3,595
Other noninterest-bearing investments, Nonmarketable equity securities, Gross losses	3,737	242
Total investment securities and other noninterest-bearing investments, Gross gains	3,217	4,554
Total investment securities and other noninterest-bearing investments, Gross losses	3,739	1,440
Net losses	(522)	3,114
Equity securities gains (losses)	(550)	3,353
Fixed income securities gains (losses), net	$ 28	$ (239)

Investment Securities Taxable a

Investment Securities Taxable and Nontaxable Interest Income by Investment Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Noninterest Income	$ 47,364	$ 27,473
Taxable [Member]
Noninterest Income	42,683	23,958
Nontaxable [Member]
Noninterest Income	4,681	3,515
Held-to-maturity Securities [Member]
Noninterest Income	5,330	6,454
Held-to-maturity Securities [Member] | Taxable [Member]
Noninterest Income	2,604	3,592
Held-to-maturity Securities [Member] | Nontaxable [Member]
Noninterest Income	2,726	2,862
Available-for-sale Securities [Member]
Noninterest Income	41,562	20,421
Available-for-sale Securities [Member] | Taxable [Member]
Noninterest Income	39,607	19,768
Available-for-sale Securities [Member] | Nontaxable [Member]
Noninterest Income	1,955	653
Trading Securities [Member]
Noninterest Income	472	598
Trading Securities [Member] | Taxable [Member]
Noninterest Income	472	598
Trading Securities [Member] | Nontaxable [Member]
Noninterest Income	$ 0	$ 0

Loans And Allowance For Credi44

Loans And Allowance For Credit Losses (Narrative) (Details)		3 Months Ended		12 Months Ended
		Mar. 31, 2016USD ($)moBilling_CyclesdPayments	Mar. 31, 2015USD ($)	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Loans And Allowance For Credit Losses [Line Items]
Unfunded Lending Commitments on Troubled Debt Restructuring		$ 1,600,000		$ 1,600,000		$ 7,500,000
Loans and Leases Receivable, Gross		41,418,185,000		41,418,185,000		40,649,542,000
Financing Receivable, Recorded Investment, Current		41,131,196,000		41,131,196,000		40,363,353,000
Threshold for Internal risk grades assigned to commercial and commercial real estate loans		750,000		750,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses		(400,000)	$ (800,000)
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		6,746,000	2,424,000	180,300,000	$ 74,500,000
Unearned income and fees, net of related costs		148,500,000		148,500,000		150,300,000
Owner occupied and commercial real estate loans, unamortized premiums		24,900,000		24,900,000		26,200,000
Land Development Loans		286,800,000		286,800,000		288,000,000
Loans at carrying value pledged as collateral for current and potential borrowings		25,300,000,000		25,300,000,000		19,400,000,000
Payments for Origination and Purchases of Loans Held-for-sale		235,700,000	309,700,000
Loans and Leases Receivable, Gain (Loss) on Sales, Net		3,000,000	4,600,000
Principle amount of loans held for sale sold		273,200,000	300,400,000
Servicing Asset at Amortized Cost		$ 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		$ 174,500,000		174,500,000		188,000,000
Total reversal amount to ALLL		400,000	1,400,000
Additional interest income due to increased cash flows from acquired loans		4,500,000	7,400,000
Provision for Loan and Lease Losses		42,145,000	(1,494,000)
Provision for Unfunded Lending Commitments		5,812,000	(1,211,000)
Other Real Estate, Foreclosed Assets, and Repossessed Assets		3,400,000		3,400,000		500,000
Other Real Estate, In Process of Forecloseing Assets		11,300,000		11,300,000		12,500,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		149,270,000		149,270,000		147,980,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		137,719,000		137,719,000		138,209,000
Financing Receivable, Recorded Investment, Past Due		286,989,000		286,989,000		286,189,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		37,202,000		37,202,000		32,024,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	392,322,000		392,322,000		217,427,000
Commercial [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		$ 21,745,253,000		21,745,253,000		21,479,014,000
Subsequent payment default period, number of days | d		90
Provision for Loan and Lease Losses		$ 45,875,000	24,934,000
Provision for Unfunded Lending Commitments		1,429,000	(3,844,000)
Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		$ 8,878,855,000		8,878,855,000		8,814,625,000
Subsequent payment default period, number of days | d		60
Provision for Loan and Lease Losses		$ (5,431,000)	459,000
Provision for Unfunded Lending Commitments		616,000	53,000
Financing Receivable, Recorded Investment, Nonaccrual Status		202,000		202,000		186,000
Consumer Loan [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		8,878,855,000		8,878,855,000		8,814,625,000
Financing Receivable, Recorded Investment, Current		8,827,112,000		8,827,112,000		8,750,302,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,868,000		23,868,000		30,646,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		27,875,000		27,875,000		33,677,000
Financing Receivable, Recorded Investment, Past Due		51,743,000		51,743,000		64,323,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,169,000		1,169,000		3,590,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	26,508,000		26,508,000		24,629,000
Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		188,451,000		188,451,000		187,149,000
Financing Receivable, Recorded Investment, Current		187,760,000		187,760,000		186,436,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		630,000		630,000		647,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		61,000		61,000		66,000
Financing Receivable, Recorded Investment, Past Due		691,000		691,000		713,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	78,000		78,000		83,000
Commercial and Industrial Sector [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		13,590,238,000		13,590,238,000		13,211,481,000
Financing Receivable, Recorded Investment, Current		13,464,106,000		13,464,106,000		13,114,045,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		90,610,000		90,610,000		60,523,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		35,522,000		35,522,000		36,913,000
Financing Receivable, Recorded Investment, Past Due		126,132,000		126,132,000		97,436,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		4,388,000		4,388,000		3,065,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	287,662,000		287,662,000		117,942,000
Finance Leases Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		437,150,000		437,150,000		441,666,000
Financing Receivable, Recorded Investment, Current		436,597,000		436,597,000		440,963,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		59,000		59,000		183,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		494,000		494,000		520,000
Financing Receivable, Recorded Investment, Past Due		553,000		553,000		703,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	13,613,000		13,613,000		3,309,000
Owner Occupied [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		7,022,429,000		7,022,429,000		7,150,028,000
Financing Receivable, Recorded Investment, Current		6,965,082,000		6,965,082,000		7,085,086,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		21,987,000		21,987,000		37,776,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		35,360,000		35,360,000		27,166,000
Financing Receivable, Recorded Investment, Past Due		57,347,000		57,347,000		64,942,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		13,350,000		13,350,000		3,626,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	46,289,000		46,289,000		43,984,000
Municipal [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		695,436,000		695,436,000		675,839,000
Financing Receivable, Recorded Investment, Current		695,436,000		695,436,000		668,207,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		7,586,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		0		0		46,000
Financing Receivable, Recorded Investment, Past Due		0		0		7,632,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		46,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	926,000		926,000		951,000
Commercial Loan [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		21,745,253,000		21,745,253,000		21,479,014,000
Financing Receivable, Recorded Investment, Current		21,561,221,000		21,561,221,000		21,308,301,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		112,656,000		112,656,000		106,068,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		71,376,000		71,376,000		64,645,000
Financing Receivable, Recorded Investment, Past Due		184,032,000		184,032,000		170,713,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		17,738,000		17,738,000		6,737,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	348,490,000		348,490,000		166,186,000
Commercial Real Estate [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		1,967,702,000		1,967,702,000		1,841,502,000
Financing Receivable, Recorded Investment, Current		1,960,562,000		1,960,562,000		1,835,360,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,573,000		2,573,000		842,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		4,567,000		4,567,000		5,300,000
Financing Receivable, Recorded Investment, Past Due		7,140,000		7,140,000		6,142,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,533,000		1,533,000		1,745,000
Term [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		8,826,375,000		8,826,375,000		8,514,401,000
Financing Receivable, Recorded Investment, Current		8,782,301,000		8,782,301,000		8,469,390,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,173,000		10,173,000		10,424,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		33,901,000		33,901,000		34,587,000
Financing Receivable, Recorded Investment, Past Due		44,074,000		44,074,000		45,011,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		18,295,000		18,295,000		21,697,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	15,791,000		15,791,000		24,867,000
Commercial Real Estate [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		10,794,077,000		10,794,077,000		10,355,903,000
Financing Receivable, Recorded Investment, Current		10,742,863,000		10,742,863,000		10,304,750,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		12,746,000		12,746,000		11,266,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		38,468,000		38,468,000		39,887,000
Financing Receivable, Recorded Investment, Past Due		51,214,000		51,214,000		51,153,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		18,295,000		18,295,000		21,697,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	17,324,000		17,324,000		26,612,000
Home Equity Line of Credit [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		2,432,632,000		2,432,632,000		2,416,357,000
Financing Receivable, Recorded Investment, Current		2,420,364,000		2,420,364,000		2,407,972,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		7,015,000		7,015,000		4,717,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		5,253,000		5,253,000		3,668,000
Financing Receivable, Recorded Investment, Past Due		12,268,000		12,268,000		8,385,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	4,604,000		4,604,000		3,053,000
One Through Four Family Residential [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		5,417,810,000		5,417,810,000		5,382,099,000
Financing Receivable, Recorded Investment, Current		5,386,087,000		5,386,087,000		5,340,549,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,617,000		10,617,000		14,828,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		21,106,000		21,106,000		26,722,000
Financing Receivable, Recorded Investment, Past Due		31,723,000		31,723,000		41,550,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		321,000		321,000		1,036,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	20,131,000		20,131,000		20,939,000
Construction And Other Consumer Real Estate [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		401,422,000		401,422,000		385,240,000
Financing Receivable, Recorded Investment, Current		397,809,000		397,809,000		374,987,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		3,365,000		3,365,000		8,593,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		248,000		248,000		1,660,000
Financing Receivable, Recorded Investment, Past Due		3,613,000		3,613,000		10,253,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		1,337,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	355,000		355,000		408,000
Revolving Credit Facility [Member]
Loans And Allowance For Credit Losses [Line Items]
Loans and Leases Receivable, Gross		438,540,000		438,540,000		443,780,000
Financing Receivable, Recorded Investment, Current		435,092,000		435,092,000		440,358,000
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,241,000		2,241,000		1,861,000
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,207,000		1,207,000		1,561,000
Financing Receivable, Recorded Investment, Past Due		3,448,000		3,448,000		3,422,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		848,000		848,000		1,217,000
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,340,000		1,340,000		146,000
Accruing [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		195,482,000		195,482,000		194,084,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350,000	110,000
Nonaccruing [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		328,006,000		328,006,000		297,088,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,396,000	$ 2,314,000
Nonaccruing [Member] | Consumer Portfolio Segment [Member]
Loans And Allowance For Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 12,483,000		$ 12,483,000		$ 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 Credi45

Loans And Allowance For Credit Losses (Summary Of Major Portfolio Segment And Specific Loan Class) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 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	$ (400)	$ (800)
Balance at end of period	611,894	620,013
Loans held for sale	108,764		$ 149,880
Commercial and industrial	13,590,238		13,211,481
Leasing	437,150		441,666
Owner occupied	7,022,429		7,150,028
Municipal	695,436		675,839
Construction and land development	1,967,702		1,841,502
Term	8,826,375		8,514,401
Provision for loan losses	(42,145)	1,494
Change In Allowance Covered By F D I C Indemnification	0	38
Allowance for Loan and Lease Losses, Write-offs	(48,110)	(20,188)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	11,811	37,070
Net loan and lease charge-offs	(36,299)	16,882
Reserve for unfunded lending commitments	69,026	82,287	74,838	$ 81,076
Provision for Unfunded Lending Commitments	5,812	(1,211)
Total allowance for credit losses	680,920	702,300
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	30,195	46,326
Provision for loan losses	5,431	$ (459)
Change In Allowance Covered By F D I C Indemnification	0
Allowance for Loan and Lease Losses, Write-offs	(3,905)	$ (3,611)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	1,752	2,338
Net loan and lease charge-offs	(2,153)	(1,273)
Reserve for unfunded lending commitments	0	575	616	628
Provision for Unfunded Lending Commitments	616	53
Total allowance for credit losses	30,195	46,901
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	117,712	131,615
Construction and land development	1,967,702		1,841,502
Term	8,826,375		8,514,401
Provision for loan losses	(1,701)	$ 26,887
Change In Allowance Covered By F D I C Indemnification	0
Allowance for Loan and Lease Losses, Write-offs	(975)	$ (626)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	2,994	14,119
Net loan and lease charge-offs	2,019	13,493
Reserve for unfunded lending commitments	12,759	18,937	16,526	21,517
Provision for Unfunded Lending Commitments	3,767	2,580
Total allowance for credit losses	130,471	150,552
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	463,987	442,072
Commercial and industrial	13,590,238		13,211,481
Leasing	437,150		441,666
Owner occupied	7,022,429		7,150,028
Municipal	695,436		675,839
Provision for loan losses	(45,875)	(24,934)
Change In Allowance Covered By F D I C Indemnification	0	38
Allowance for Loan and Lease Losses, Write-offs	(43,230)	(15,951)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	7,065	20,613
Net loan and lease charge-offs	(36,165)	4,662
Reserve for unfunded lending commitments	56,267	62,775	$ 57,696	$ 58,931
Provision for Unfunded Lending Commitments	1,429	(3,844)
Total allowance for credit losses	$ 520,254	$ 504,847

Loans And Allowance For Credi46

Loans And Allowance For Credit Losses (Summary Of Changes In The Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Dec. 31, 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	$ (42,145)	$ 1,494
Change In Allowance Covered By F D I C Indemnification	0	(38)
Allowance for Loan and Lease Losses, Write-offs	(48,110)	(20,188)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	606,048	604,663
Net loan and lease charge-offs	(36,299)	16,882
Balance at end of period	69,026	82,287
Allowance for loan losses	606,048	604,663	$ 611,894	$ 606,048	$ 620,013	$ 604,663
Reserve for unfunded lending commitments	69,026	82,287	69,026	74,838	82,287	81,076
Total allowance for credit losses			680,920		702,300
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	11,811	37,070
Provision for Unfunded Lending Commitments	(5,812)	1,211
Balance at end of period	611,894	620,013
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(45,875)	(24,934)
Change In Allowance Covered By F D I C Indemnification	0	(38)
Allowance for Loan and Lease Losses, Write-offs	(43,230)	(15,951)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	454,277	412,514
Net loan and lease charge-offs	(36,165)	4,662
Balance at end of period	56,267	62,775
Allowance for loan losses	454,277	412,514	463,987	454,277	442,072	412,514
Reserve for unfunded lending commitments	56,267	62,775	56,267	57,696	62,775	58,931
Total allowance for credit losses			520,254		504,847
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	7,065	20,613
Provision for Unfunded Lending Commitments	(1,429)	3,844
Balance at end of period	463,987	442,072
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(1,701)	$ 26,887
Change In Allowance Covered By F D I C Indemnification	0
Allowance for Loan and Lease Losses, Write-offs	(975)	$ (626)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	113,992	145,009
Net loan and lease charge-offs	2,019	13,493
Balance at end of period	12,759	18,937
Allowance for loan losses	113,992	145,009	117,712	113,992	131,615	145,009
Reserve for unfunded lending commitments	12,759	18,937	12,759	16,526	18,937	21,517
Total allowance for credit losses			130,471		150,552
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	2,994	14,119
Provision for Unfunded Lending Commitments	(3,767)	(2,580)
Balance at end of period	117,712	131,615
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	5,431	$ (459)
Change In Allowance Covered By F D I C Indemnification	0
Allowance for Loan and Lease Losses, Write-offs	(3,905)	$ (3,611)
Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	37,779	47,140
Net loan and lease charge-offs	(2,153)	(1,273)
Balance at end of period	0	575
Allowance for loan losses	37,779	47,140	30,195	37,779	46,326	47,140
Reserve for unfunded lending commitments	0	575	0	$ 616	575	$ 628
Total allowance for credit losses			$ 30,195		$ 46,901
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	1,752	2,338
Provision for Unfunded Lending Commitments	(616)	(53)
Balance at end of period	$ 30,195	$ 46,326

Loans And Allowance For Credi47

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
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 618,858	$ 620,253
Impaired Financing Receivable, Interest Income, Accrual Method	8,908	12,470
Allowance for loan losses: Individually evaluated for impairment	(87,264)		$ (49,525)
Allowance for loan losses: Collectively evaluated for impairment	524,273		555,578
Allowance for loan losses: Purchased loans with evidence of credit deterioration	357		945
Allowance for loan losses: Total	611,894	620,013	606,048	$ 604,663
Outstanding loan balances: Individually evaluated for impairment	660,104		489,575
Outstanding loan balances: Collectively evaluated for impairment	40,651,761		40,035,044
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	106,320		124,923
Total loans	41,418,185		40,649,542
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	281,841	160,013
Impaired Financing Receivable, Interest Income, Accrual Method	1,472	1,451
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	122,241	177,568
Impaired Financing Receivable, Interest Income, Accrual Method	2,431	4,092
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Individually evaluated for impairment	(76,987)		(36,909)
Allowance for loan losses: Collectively evaluated for impairment	386,943		417,295
Allowance for loan losses: Purchased loans with evidence of credit deterioration	57		73
Allowance for loan losses: Total	463,987	442,072	454,277	412,514
Outstanding loan balances: Individually evaluated for impairment	477,363		289,629
Outstanding loan balances: Collectively evaluated for impairment	21,219,580		21,129,125
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	48,310		60,260
Total loans	21,745,253		21,479,014
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	14,293	38,736
Impaired Financing Receivable, Interest Income, Accrual Method	513	569
Allowance for loan losses: Total	117,712	131,615	113,992	145,009
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	2,502	4,748
Impaired Financing Receivable, Interest Income, Accrual Method	107	285
Allowance for loan losses: Individually evaluated for impairment	(7,230)		(9,462)
Allowance for loan losses: Collectively evaluated for impairment	22,882		27,866
Allowance for loan losses: Purchased loans with evidence of credit deterioration	83		451
Allowance for loan losses: Total	30,195	46,326	37,779	$ 47,140
Outstanding loan balances: Individually evaluated for impairment	86,957		92,605
Outstanding loan balances: Collectively evaluated for impairment	8,782,839		8,712,079
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	9,059		9,941
Total loans	8,878,855		8,814,625
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	405,014	338,614
Impaired Financing Receivable, Interest Income, Accrual Method	3,903	5,543
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	106,236	143,496
Impaired Financing Receivable, Interest Income, Accrual Method	3,458	5,008
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	120,529	182,232
Impaired Financing Receivable, Interest Income, Accrual Method	3,971	5,577
Allowance for loan losses: Individually evaluated for impairment	(3,047)		(3,154)
Allowance for loan losses: Collectively evaluated for impairment	114,448		110,417
Allowance for loan losses: Purchased loans with evidence of credit deterioration	217		421
Allowance for loan losses: Total	117,712		113,992
Outstanding loan balances: Individually evaluated for impairment	95,784		107,341
Outstanding loan balances: Collectively evaluated for impairment	10,649,342		10,193,840
Financing Receivable Allowance For Credit Losses and Receivables Acquired With Deteriorated Credit Quality	48,951		54,722
Total loans	10,794,077		$ 10,355,903
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	24,730	25,386
Impaired Financing Receivable, Interest Income, Accrual Method	386	413
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	63,166	66,711
Impaired Financing Receivable, Interest Income, Accrual Method	477	510
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	2,917	2,560
Impaired Financing Receivable, Interest Income, Accrual Method	48	42
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	0	2
Impaired Financing Receivable, Interest Income, Accrual Method	16	100
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	93,315	99,407
Impaired Financing Receivable, Interest Income, Accrual Method	1,034	1,350
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Average Recorded Investment	932	1,033
Impaired Financing Receivable, Interest Income, Accrual Method	$ 0	$ 0

Loans And Allowance For Credi48

Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	[1]	$ 392,322	$ 217,427
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		6,152	7,045
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		202	186
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		356,034	163,906
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		14,107	3,829
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		74,369	73,881
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		926	951
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		445,436	242,567
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		33,051	40,253
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		39,203	47,298
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		10,700	8,270
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		43,791	50,254
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		645	748
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		1,791	537
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		57,129	59,995
Financing Receivables, Total [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		$ 541,768	$ 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 Credi49

Loans And Allowance For Credit Losses (Summary Of Past Due Loans (Accruing And Nonaccruing)) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 6,746	$ 2,424	$ 180,300	$ 74,500
Financing Receivable, Recorded Investment, Current		41,131,196		41,131,196		$ 40,363,353
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		149,270		149,270		147,980
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		137,719		137,719		138,209
Total past due		286,989		286,989		286,189
Total loans		41,418,185		41,418,185		40,649,542
Accruing loans 90+ days past due		37,202		37,202		32,024
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	392,322		392,322		217,427
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		2,992	44
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		21,745,253		21,745,253		21,479,014
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		6,586	1,030
Financing Receivable, Recorded Investment, Nonaccrual Status		445,436		445,436		242,567
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Financing Receivable, Recorded Investment, Nonaccrual Status		6,152		6,152		7,045
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		8,878,855		8,878,855		8,814,625
Financing Receivable, Recorded Investment, Nonaccrual Status		202		202		186
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Financing Receivable, Recorded Investment, Nonaccrual Status		57,129		57,129		59,995
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		356,034		356,034		163,906
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		14,107		14,107		3,829
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,594	986
Financing Receivable, Recorded Investment, Nonaccrual Status		74,369		74,369		73,881
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		926		926		951
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status		33,051		33,051		40,253
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Total loans		10,794,077		10,794,077		10,355,903
Financing Receivable, Recorded Investment, Nonaccrual Status		39,203		39,203		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
Financing Receivable, Recorded Investment, Nonaccrual Status		10,700		10,700		8,270
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Financing Receivable, Recorded Investment, Nonaccrual Status		43,791		43,791		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
Financing Receivable, Recorded Investment, Nonaccrual Status		645		645		748
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		1,791		$ 1,791		$ 537
Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	110
Accruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Accruing [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		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
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
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
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
Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,396	2,314
Nonaccruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		2,992	44
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,236	1,030
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	0
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		244	986
Nonaccruing [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
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
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	0
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
[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 Outstanding Loan Balances (Accruing And Nonaccruing) Categorized By Credit Quality Indicators) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 6,746	$ 2,424	$ 180,300	$ 74,500
Financing Receivable, Recorded Investment, Current		41,131,196		41,131,196		$ 40,363,353
Loans held for sale		108,764		108,764		149,880
Commercial and industrial		13,590,238		13,590,238		13,211,481
Leasing		437,150		437,150		441,666
Owner occupied		7,022,429		7,022,429		7,150,028
Municipal		695,436		695,436		675,839
Total commercial		21,745,253		21,745,253		21,479,014
Construction and land development		1,967,702		1,967,702		1,841,502
Term		8,826,375		8,826,375		8,514,401
Loans Receivable, Gross, Commercial, Real Estate		10,794,077		10,794,077		10,355,903
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,432,632		2,432,632		2,416,357
1-4 family residential		5,417,810		5,417,810		5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction		401,422		401,422		385,240
Bankcard and other revolving plans		438,540		438,540		443,780
Other		188,451		188,451		187,149
Total consumer		8,878,855		8,878,855		8,814,625
Total loans		41,418,185		41,418,185		40,649,542
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		149,270		149,270		147,980
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		137,719		137,719		138,209
Financing Receivable, Recorded Investment, Past Due		286,989		286,989		286,189
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		37,202		37,202		32,024
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	392,322		392,322		217,427
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,432,632		2,432,632		2,416,357
1-4 family residential		5,417,810		5,417,810		5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction		401,422		401,422		385,240
Bankcard and other revolving plans		438,540		438,540		443,780
Other		188,451		188,451		187,149
Total consumer		8,878,855		8,878,855		8,814,625
Total loans		8,878,855		8,878,855		8,814,625
Financing Receivable, Recorded Investment, Nonaccrual Status		202		202		186
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	$ 1,284
Construction and land development		1,967,702		1,967,702		1,841,502
Term		8,826,375		8,826,375		8,514,401
Loans Receivable, Gross, Commercial, Real Estate		10,794,077		10,794,077		10,355,903
Financing Receivable, Recorded Investment, Nonaccrual Status		6,152		6,152		7,045
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		13,590,238		13,590,238		13,211,481
Leasing		437,150		437,150		441,666
Owner occupied		7,022,429		7,022,429		7,150,028
Municipal		695,436		695,436		675,839
Total commercial		21,745,253		21,745,253		21,479,014
Total loans		21,745,253		21,745,253		21,479,014
Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		39,267,777		39,267,777		38,647,130
Pass [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,418,415		2,418,415		2,404,635
1-4 family residential		5,368,085		5,368,085		5,325,519
Loans and Leases Receivable, Gross, Consumer, Construction		399,765		399,765		381,738
Bankcard and other revolving plans		433,989		433,989		440,282
Other		188,099		188,099		186,836
Total consumer		8,808,353		8,808,353		8,739,010
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		1,921,338		1,921,338		1,786,610
Term		8,634,484		8,634,484		8,319,348
Loans Receivable, Gross, Commercial, Real Estate		10,555,822		10,555,822		10,105,958
Pass [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		12,245,903		12,245,903		12,007,076
Leasing		402,160		402,160		411,131
Owner occupied		6,577,162		6,577,162		6,720,052
Municipal		678,377		678,377		663,903
Total commercial		19,903,602		19,903,602		19,802,162
Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		618,356		618,356		634,390
Special Mention [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		0
1-4 family residential		0		0		0
Loans and Leases Receivable, Gross, Consumer, Construction		0		0		0
Bankcard and other revolving plans		0		0		0
Other		0		0		0
Total consumer		0		0		0
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		14,540		14,540		42,348
Term		41,331		41,331		47,245
Loans Receivable, Gross, Commercial, Real Estate		55,871		55,871		89,593
Special Mention [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		390,768		390,768		399,847
Leasing		7,106		7,106		5,166
Owner occupied		156,723		156,723		139,784
Municipal		7,888		7,888		0
Total commercial		562,485		562,485		544,797
Total Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		611,894		611,894		606,048
Total Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer		30,195		30,195		37,779
Total Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		117,712		117,712		113,992
Total Allowance [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial		463,987		463,987		454,277
Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		251		251		8,927
Doubtful [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		0
1-4 family residential		0		0		0
Loans and Leases Receivable, Gross, Consumer, Construction		0		0		0
Bankcard and other revolving plans		0		0		0
Other		0		0		0
Total consumer		0		0		0
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		0		0		0
Term		0		0		8,772
Loans Receivable, Gross, Commercial, Real Estate		0		0		8,772
Doubtful [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		251		251		155
Leasing		0		0		0
Owner occupied		0		0		0
Municipal		0		0		0
Total commercial		251		251		155
Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		1,531,801		1,531,801		1,359,095
Substandard [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		14,217		14,217		11,722
1-4 family residential		49,725		49,725		56,580
Loans and Leases Receivable, Gross, Consumer, Construction		1,657		1,657		3,502
Bankcard and other revolving plans		4,551		4,551		3,498
Other		352		352		313
Total consumer		70,502		70,502		75,615
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Construction and land development		31,824		31,824		12,544
Term		150,560		150,560		139,036
Loans Receivable, Gross, Commercial, Real Estate		182,384		182,384		151,580
Substandard [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and industrial		953,316		953,316		804,403
Leasing		27,884		27,884		25,369
Owner occupied		288,544		288,544		290,192
Municipal		9,171		9,171		11,936
Total commercial		1,278,915		1,278,915		1,131,900
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		8,827,112		8,827,112		8,750,302
Total loans		8,878,855		8,878,855		8,814,625
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,868		23,868		30,646
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		27,875		27,875		33,677
Financing Receivable, Recorded Investment, Past Due		51,743		51,743		64,323
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,169		1,169		3,590
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	26,508		26,508		24,629
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		187,760		187,760		186,436
Total loans		188,451		188,451		187,149
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		630		630		647
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		61		61		66
Financing Receivable, Recorded Investment, Past Due		691		691		713
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	78		78		83
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		8,782,301		8,782,301		8,469,390
Total loans		8,826,375		8,826,375		8,514,401
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,173		10,173		10,424
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		33,901		33,901		34,587
Financing Receivable, Recorded Investment, Past Due		44,074		44,074		45,011
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		18,295		18,295		21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	15,791		15,791		24,867
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		1,960,562		1,960,562		1,835,360
Total loans		1,967,702		1,967,702		1,841,502
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,573		2,573		842
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		4,567		4,567		5,300
Financing Receivable, Recorded Investment, Past Due		7,140		7,140		6,142
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,533		1,533		1,745
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		13,464,106		13,464,106		13,114,045
Total loans		13,590,238		13,590,238		13,211,481
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		90,610		90,610		60,523
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		35,522		35,522		36,913
Financing Receivable, Recorded Investment, Past Due		126,132		126,132		97,436
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		4,388		4,388		3,065
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	287,662		287,662		117,942
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		436,597		436,597		440,963
Total loans		437,150		437,150		441,666
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		59		59		183
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		494		494		520
Financing Receivable, Recorded Investment, Past Due		553		553		703
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	13,613		13,613		3,309
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		6,965,082		6,965,082		7,085,086
Total loans		7,022,429		7,022,429		7,150,028
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		21,987		21,987		37,776
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		35,360		35,360		27,166
Financing Receivable, Recorded Investment, Past Due		57,347		57,347		64,942
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		13,350		13,350		3,626
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	46,289		46,289		43,984
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		695,436		695,436		668,207
Total loans		695,436		695,436		675,839
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		0		0		7,586
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		0		0		46
Financing Receivable, Recorded Investment, Past Due		0		0		7,632
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		46
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	926		926		951
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		10,742,863		10,742,863		10,304,750
Total loans		10,794,077		10,794,077		10,355,903
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		12,746		12,746		11,266
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		38,468		38,468		39,887
Financing Receivable, Recorded Investment, Past Due		51,214		51,214		51,153
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		18,295		18,295		21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	17,324		17,324		26,612
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		2,420,364		2,420,364		2,407,972
Total loans		2,432,632		2,432,632		2,416,357
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		7,015		7,015		4,717
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		5,253		5,253		3,668
Financing Receivable, Recorded Investment, Past Due		12,268		12,268		8,385
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	4,604		4,604		3,053
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		21,561,221		21,561,221		21,308,301
Total loans		21,745,253		21,745,253		21,479,014
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		112,656		112,656		106,068
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		71,376		71,376		64,645
Financing Receivable, Recorded Investment, Past Due		184,032		184,032		170,713
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		17,738		17,738		6,737
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	348,490		348,490		166,186
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		5,386,087		5,386,087		5,340,549
Total loans		5,417,810		5,417,810		5,382,099
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,617		10,617		14,828
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		21,106		21,106		26,722
Financing Receivable, Recorded Investment, Past Due		31,723		31,723		41,550
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		321		321		1,036
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	20,131		20,131		20,939
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Current		397,809		397,809		374,987
Total loans		401,422		401,422		385,240
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		3,365		3,365		8,593
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		248		248		1,660
Financing Receivable, Recorded Investment, Past Due		3,613		3,613		10,253
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0		0		1,337
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	$ 355		$ 355		$ 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 Credi51

Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	$ 2,432,632		$ 2,416,357
Unpaid principal balance	841,333		687,148
Recorded investment	729,840		566,599
Impaired Financing Receivable, Related Allowance	85,884		48,697
Average recorded investment	618,858	$ 620,253
Interest income recognized	8,908	12,470
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	457,773		272,161
Recorded investment	398,189		207,919
Impaired Financing Receivable, Related Allowance	71,962		30,538
Average recorded investment	281,841	160,013
Interest income recognized	1,472	1,451
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	124,637		141,526
Recorded investment	113,936		126,267
Impaired Financing Receivable, Related Allowance	4,162		5,486
Average recorded investment	122,241	177,568
Interest income recognized	2,431	4,092
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	1,405		1,430
Recorded investment	926		951
Impaired Financing Receivable, Related Allowance	0		0
Average recorded investment	932	1,033
Interest income recognized	0	0
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	583,815		415,117
Recorded investment	513,051		335,137
Impaired Financing Receivable, Related Allowance	76,124		36,024
Average recorded investment	405,014	338,614
Interest income recognized	3,903	5,543
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	22,202		22,791
Recorded investment	14,125		14,634
Impaired Financing Receivable, Related Allowance	883		618
Average recorded investment	14,293	38,736
Interest income recognized	513	569
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	134,297		142,239
Recorded investment	108,070		117,225
Impaired Financing Receivable, Related Allowance	1,706		2,604
Average recorded investment	106,236	143,496
Interest income recognized	3,458	5,008
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	156,499		165,030
Recorded investment	122,195		131,859
Impaired Financing Receivable, Related Allowance	2,589		3,222
Average recorded investment	120,529	182,232
Interest income recognized	3,971	5,577
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	28,148		27,064
Recorded investment	25,423		24,299
Impaired Financing Receivable, Related Allowance	145		243
Average recorded investment	24,730	25,386
Interest income recognized	386	413
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,432,632		2,416,357
Unpaid principal balance	2,565		3,187
Recorded investment	1,935		2,606
Impaired Financing Receivable, Related Allowance	53		299
Average recorded investment	2,502	4,748
Interest income recognized	107	285
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	66,860		74,009
Recorded investment	64,372		70,695
Impaired Financing Receivable, Related Allowance	6,805		8,736
Average recorded investment	63,166	66,711
Interest income recognized	477	510
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	3,446		2,741
Recorded investment	2,864		2,003
Impaired Financing Receivable, Related Allowance	168		173
Average recorded investment	2,917	2,560
Interest income recognized	48	42
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Average recorded investment	0	2
Interest income recognized	16	100
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	101,019		107,001
Recorded investment	94,594		99,603
Impaired Financing Receivable, Related Allowance	7,171		9,451
Average recorded investment	93,315	99,407
Interest income recognized	1,034	$ 1,350
Impaired Financing Receivable Related Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	444,964		300,949
Impaired Financing Receivable Related Allowance [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	329,801		163,729
Impaired Financing Receivable Related Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	39,778		43,243
Impaired Financing Receivable Related Allowance [Member] | Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	0		0
Impaired Financing Receivable Related Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	369,579		206,972
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	9,319		9,558
Impaired Financing Receivable Related Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	26,275		34,361
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	35,594		43,919
Impaired Financing Receivable Related Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	4,295		5,319
Impaired Financing Receivable Related Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	1,900		2,570
Impaired Financing Receivable Related Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	31,720		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	1,876		1,014
Impaired Financing Receivable Related Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	39,791		50,058
Impaired Financing Receivable Recorded Investment With No Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	284,876		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	68,388		44,190
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	74,158		83,024
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	926		951
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	143,472		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	4,806		5,076
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	81,795		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	86,601		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	21,128		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	35		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	32,652		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	988		989
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	$ 54,803		$ 49,545

Loans And Allowance For Credi52

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		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 6,746	$ 2,424	$ 180,300	$ 74,500
1-4 family residential		5,417,810		5,417,810		$ 5,382,099
Construction and other consumer real estate		401,422		401,422		385,240
Commercial and industrial		13,590,238		13,590,238		13,211,481
Home equity credit line		2,432,632		2,432,632		2,416,357
Bankcard and other revolving plans		438,540		438,540		443,780
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		13,590,238		13,590,238		13,211,481
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		5,417,810		5,417,810		5,382,099
Construction and other consumer real estate		401,422		401,422		385,240
Home equity credit line		2,432,632		2,432,632		2,416,357
Bankcard and other revolving plans		438,540		438,540		443,780
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		2,992	44
Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,594	986
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		6,586	1,030
Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	110
Recorded investment resulting from the following modification types		195,482		195,482		194,084
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Recorded investment resulting from the following modification types		9,360		9,360		9,792
Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		2,620		2,620		1,710
Accruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Commercial and industrial		61,589		61,589		61,231
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Recorded investment resulting from the following modification types		28,805		28,805		29,827
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Recorded investment resulting from the following modification types		90,394		90,394		91,058
Accruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Recorded investment resulting from the following modification types		30,984		30,984		29,558
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Recorded investment resulting from the following modification types		40,344		40,344		39,350
Accruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
Home equity credit line		16,373		16,373		15,421
Accruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
1-4 family residential		45,751		45,751		46,545
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
Recorded investment resulting from the following modification types		64,744		64,744		63,676
Accruing [Member] | Interest Rate Below Market [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		9,528		9,528		10,026
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		44		44		94
Accruing [Member] | Interest Rate Below Market [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		171		171		174
Accruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		198		198		202
Accruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,227		2,227		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		2,425		2,425		2,201
Accruing [Member] | Interest Rate Below Market [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,660		4,660		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		4,704		4,704		4,790
Accruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		198		198		192
Accruing [Member] | Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		2,030		2,030		2,669
Accruing [Member] | Interest Rate Below Market [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,399		2,399		3,035
Accruing [Member] | Maturity Or Team Extension [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		38,284		38,284		7,439
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0
Accruing [Member] | Maturity Or Team Extension [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		357		357		384
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		26,309		26,309		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		1,458		1,458		681
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		27,767		27,767		3,917
Accruing [Member] | Maturity Or Team Extension [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		7,397		7,397		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		7,397		7,397		638
Accruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		2,414		2,414		2,147
Accruing [Member] | Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		349		349		353
Accruing [Member] | Maturity Or Team Extension [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,120		3,120		2,884
Accruing [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		18,161		18,161		17,618
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0
Accruing [Member] | Principal Forgiveness [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		0		0		0
Accruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		12		12		13
Accruing [Member] | Principal Forgiveness [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		920		920		929
Accruing [Member] | Principal Forgiveness [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		932		932		942
Accruing [Member] | Principal Forgiveness [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		161		161		166
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		161		161		166
Accruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		10,570		10,570		9,763
Accruing [Member] | Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		6,498		6,498		6,747
Accruing [Member] | Principal Forgiveness [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		17,068		17,068		16,510
Accruing [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,471		2,471		1,509
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0
Accruing [Member] | Payment Deferral [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		1,143		1,143		0
Accruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		91		91		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
Accruing [Member] | Payment Deferral [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		91		91		100
Accruing [Member] | Payment Deferral [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		980		980		976
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		980		980		976
Accruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		0		0		0
Accruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		257		257		433
Accruing [Member] | Payment Deferral [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,400		1,400		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]	16,381		16,381		38,939
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]	0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate	[1]	0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[1]	1,085		1,085		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]	7,882		7,882		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]	8,967		8,967		33,086
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]	4,037		4,037		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]	4,037		4,037		2,249
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[1]	164		164		164
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[1]	3,213		3,213		3,440
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]	3,377		3,377		3,604
Accruing [Member] | Multiple Modification Types [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	110,657		110,657		118,553
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	9,316		9,316		9,698
Accruing [Member] | Multiple Modification Types [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate	[2]	949		949		1,152
Accruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[2]	33,894		33,894		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]	16,318		16,318		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]	50,212		50,212		50,812
Accruing [Member] | Multiple Modification Types [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	13,749		13,749		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]	23,065		23,065		30,531
Accruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[2]	3,027		3,027		3,155
Accruing [Member] | Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[2]	33,404		33,404		32,903
Accruing [Member] | Multiple Modification Types [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	37,380		37,380		37,210
Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,396	2,314
Recorded investment resulting from the following modification types		328,006		328,006		297,088
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Recorded investment resulting from the following modification types		3,656		3,656		3,697
Nonaccruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		12,483		12,483		13,346
Nonaccruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		2,992	44
Commercial and industrial		83,136		83,136		55,556
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		244	986
Recorded investment resulting from the following modification types		22,551		22,551		19,447
Nonaccruing [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		926		926		951
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,236	1,030
Recorded investment resulting from the following modification types		106,613		106,613		75,954
Nonaccruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Recorded investment resulting from the following modification types		9,772		9,772		10,007
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Recorded investment resulting from the following modification types		13,428		13,428		13,704
Nonaccruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Nonaccruing [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		2,414		2,414		2,194
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	0
1-4 family residential		9,852		9,852		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
Construction and other consumer real estate		217		217		210
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	$ 0
Recorded investment resulting from the following modification types		132,524		132,524		103,004
Nonaccruing [Member] | Interest Rate Below Market [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		12,473		12,473		12,590
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		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		7
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		26		26		28
Nonaccruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,122		1,122		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
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,148		1,148		713
Nonaccruing [Member] | Interest Rate Below Market [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,797		1,797		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		1,797		1,797		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		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
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
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,945		2,945		2,564
Nonaccruing [Member] | Maturity Or Team Extension [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		43,011		43,011		11,723
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		312		312		333
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		721		721		876
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		396		396		455
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,209		1,209		1,669
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		926		926		951
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		2,531		2,531		3,075
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		1,163		1,163		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		1,475		1,475		333
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		299		299		500
Nonaccruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		325		325		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		97		97		101
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,727		4,727		4,284
Nonaccruing [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		21,480		21,480		21,087
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
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,319		3,319		3,469
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		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
Nonaccruing [Member] | Principal Forgiveness [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		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
Nonaccruing [Member] | Principal Forgiveness [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		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
Nonaccruing [Member] | Principal Forgiveness [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		1,359		1,359		1,400
Nonaccruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		1,944		1,944		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		16		16		17
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,319		3,319		3,469
Nonaccruing [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		7,046		7,046		4,350
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
Nonaccruing [Member] | Payment Deferral [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		395		395		238
Nonaccruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial		1,116		1,116		1,879
Nonaccruing [Member] | Payment Deferral [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		3,064		3,064		724
Nonaccruing [Member] | Payment Deferral [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,180		4,180		2,603
Nonaccruing [Member] | Payment Deferral [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		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
Nonaccruing [Member] | Payment Deferral [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line		51		51		54
Nonaccruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential		302		302		136
Nonaccruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Construction and other consumer real estate		42		42		48
Nonaccruing [Member] | Payment Deferral [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types		4,575		4,575		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]	42,091		42,091		49,846
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]	3,135		3,135		3,156
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]	829		829		1,180
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[1]	18,551		18,551		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]	275		275		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
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]	18,826		18,826		3,611
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]	2,920		2,920		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]	6,055		6,055		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
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]	829		829		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
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]	25,710		25,710		10,907
Nonaccruing [Member] | Multiple Modification Types [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	201,905		201,905		197,492
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	209		209		208
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	7,219		7,219		7,576
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Commercial and industrial	[2]	63,047		63,047		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]	16,881		16,881		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
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	79,928		79,928		65,952
Nonaccruing [Member] | Multiple Modification Types [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	3,892		3,892		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]	4,101		4,101		5,411
Nonaccruing [Member] | Multiple Modification Types [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Home equity credit line	[2]	705		705		233
Nonaccruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
1-4 family residential	[2]	6,452		6,452		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]	62		62		44
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment resulting from the following modification types	[2]	$ 91,248		$ 91,248		$ 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 Credi53

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		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 6,746	$ 2,424	$ 180,300	$ 74,500
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,432,632		2,432,632		$ 2,416,357
Net financial impact on interest income		438	594
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Net financial impact on interest income		122	169
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Net financial impact on interest income		(1)	(37)
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,432,632		2,432,632		2,416,357
Net financial impact on interest income		236	279
Commercial and Industrial Sector [Member]
Financing Receivable, Modifications [Line Items]
Net financial impact on interest income		(73)	(57)
Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,594	986
Net financial impact on interest income		(49)	(112)
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		6,586	1,030
Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Net financial impact on interest income		(79)	(109)
One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Net financial impact on interest income		(230)	(271)
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Net financial impact on interest income		(5)	(7)
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Net financial impact on interest income		80	146
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Net financial impact on interest income		(1)	(1)
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,396	2,314
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		244	986
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,236	1,030
Nonaccruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	0
Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Nonaccruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	0
Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	110
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Accruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
Loans and Leases Receivable, Gross, Consumer, Home Equity		16,373		16,373		15,421
Accruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	$ 110
Accruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		10,570		10,570		9,763
Accruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		198		198		192
Accruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,414		2,414		2,147
Accruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	[1]	164		164		164
Accruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	[2]	$ 3,027		$ 3,027		$ 3,155
[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 (Schedule Of Investment Of Accruing And Nonaccruing Loans Modified As Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 6,746	$ 2,424	$ 180,300	$ 74,500
Loans Receivable, Gross, Commercial and Industrial		13,590,238		13,590,238		$ 13,211,481
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,432,632		2,432,632		2,416,357
Loans and Leases Receivable, Gross, Consumer, Mortgage		5,417,810		5,417,810		5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction		401,422		401,422		385,240
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card		438,540		438,540		443,780
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		13,590,238		13,590,238		13,211,481
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		2,992	44
Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,594	986
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		6,586	1,030
Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,432,632		2,432,632		2,416,357
Loans and Leases Receivable, Gross, Consumer, Mortgage		5,417,810		5,417,810		5,382,099
Loans and Leases Receivable, Gross, Consumer, Construction		401,422		401,422		385,240
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card		438,540		438,540		443,780
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	110
Accruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	110
Financing Receivable, Modifications, Recorded Investment		195,482		195,482		194,084
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Financing Receivable, Modifications, Recorded Investment		9,360		9,360		9,792
Accruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Loans Receivable, Gross, Commercial and Industrial		61,589		61,589		61,231
Accruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Financing Receivable, Modifications, Recorded Investment		28,805		28,805		29,827
Accruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,350	0
Financing Receivable, Modifications, Recorded Investment		90,394		90,394		91,058
Accruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Financing Receivable, Modifications, Recorded Investment		30,984		30,984		29,558
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Financing Receivable, Modifications, Recorded Investment		40,344		40,344		39,350
Accruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Accruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
Loans and Leases Receivable, Gross, Consumer, Home Equity		16,373		16,373		15,421
Accruing [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Loans and Leases Receivable, Gross, Consumer, Mortgage		45,751		45,751		46,545
Accruing [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		2,620		2,620		1,710
Accruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	110
Financing Receivable, Modifications, Recorded Investment		64,744		64,744		63,676
Accruing [Member] | Interest Rate Below Market [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		9,528		9,528		10,026
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		44		44		94
Accruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		198		198		202
Accruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		2,227		2,227		1,999
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		2,425		2,425		2,201
Accruing [Member] | Interest Rate Below Market [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		4,660		4,660		4,696
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		4,704		4,704		4,790
Accruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		198		198		192
Accruing [Member] | Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		2,030		2,030		2,669
Accruing [Member] | Interest Rate Below Market [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		171		171		174
Accruing [Member] | Interest Rate Below Market [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		2,399		2,399		3,035
Accruing [Member] | Multiple Modification Types [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	110,657		110,657		118,553
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	9,316		9,316		9,698
Accruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial	[1]	33,894		33,894		34,473
Accruing [Member] | Multiple Modification Types [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	16,318		16,318		16,339
Accruing [Member] | Multiple Modification Types [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	50,212		50,212		50,812
Accruing [Member] | Multiple Modification Types [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	13,749		13,749		20,833
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	23,065		23,065		30,531
Accruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	[1]	3,027		3,027		3,155
Accruing [Member] | Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	[1]	33,404		33,404		32,903
Accruing [Member] | Multiple Modification Types [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction	[1]	949		949		1,152
Accruing [Member] | Multiple Modification Types [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	37,380		37,380		37,210
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	16,381		16,381		38,939
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial	[2]	1,085		1,085		23,207
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	7,882		7,882		9,879
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	8,967		8,967		33,086
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	4,037		4,037		2,249
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	4,037		4,037		2,249
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	[2]	164		164		164
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	[2]	3,213		3,213		3,440
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction	[2]	0		0		0
Accruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	3,377		3,377		3,604
Accruing [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		2,471		2,471		1,509
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Accruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		91		91		100
Accruing [Member] | Payment Deferral [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Accruing [Member] | Payment Deferral [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		91		91		100
Accruing [Member] | Payment Deferral [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		980		980		976
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		980		980		976
Accruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		0
Accruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		257		257		433
Accruing [Member] | Payment Deferral [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		1,143		1,143		0
Accruing [Member] | Payment Deferral [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,400		1,400		433
Accruing [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		18,161		18,161		17,618
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Accruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		12		12		13
Accruing [Member] | Principal Forgiveness [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		920		920		929
Accruing [Member] | Principal Forgiveness [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		932		932		942
Accruing [Member] | Principal Forgiveness [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		161		161		166
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		161		161		166
Accruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		10,570		10,570		9,763
Accruing [Member] | Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		6,498		6,498		6,747
Accruing [Member] | Principal Forgiveness [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		0		0		0
Accruing [Member] | Principal Forgiveness [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		17,068		17,068		16,510
Accruing [Member] | Maturity Or Team Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		38,284		38,284		7,439
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		26,309		26,309		3,236
Accruing [Member] | Maturity Or Team Extension [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,458		1,458		681
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		27,767		27,767		3,917
Accruing [Member] | Maturity Or Team Extension [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		7,397		7,397		638
Accruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		7,397		7,397		638
Accruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,414		2,414		2,147
Accruing [Member] | Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		349		349		353
Accruing [Member] | Maturity Or Team Extension [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		357		357		384
Accruing [Member] | Maturity Or Team Extension [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		3,120		3,120		2,884
Nonaccruing [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,396	2,314
Financing Receivable, Modifications, Recorded Investment		328,006		328,006		297,088
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Financing Receivable, Modifications, Recorded Investment		3,656		3,656		3,697
Nonaccruing [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		2,992	44
Loans Receivable, Gross, Commercial and Industrial		83,136		83,136		55,556
Nonaccruing [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		244	986
Financing Receivable, Modifications, Recorded Investment		22,551		22,551		19,447
Nonaccruing [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		926		926		951
Nonaccruing [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		3,236	1,030
Financing Receivable, Modifications, Recorded Investment		106,613		106,613		75,954
Nonaccruing [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Financing Receivable, Modifications, Recorded Investment		9,772		9,772		10,007
Nonaccruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	1,284
Financing Receivable, Modifications, Recorded Investment		13,428		13,428		13,704
Nonaccruing [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		2,414		2,414		2,194
Nonaccruing [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		0	0
Nonaccruing [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	0
Loans and Leases Receivable, Gross, Consumer, Mortgage		9,852		9,852		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
Loans and Leases Receivable, Gross, Consumer, Construction		217		217		210
Nonaccruing [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		12,483		12,483		13,346
Nonaccruing [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		160	$ 0
Financing Receivable, Modifications, Recorded Investment		132,524		132,524		103,004
Nonaccruing [Member] | Interest Rate Below Market [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		12,473		12,473		12,590
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		26		26		28
Nonaccruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,122		1,122		685
Nonaccruing [Member] | Interest Rate Below Market [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,148		1,148		713
Nonaccruing [Member] | Interest Rate Below Market [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,797		1,797		1,844
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,797		1,797		1,844
Nonaccruing [Member] | Interest Rate Below Market [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		0		0		7
Nonaccruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		0		0		0
Nonaccruing [Member] | Interest Rate Below Market [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		7
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		2,945		2,945		2,564
Nonaccruing [Member] | Multiple Modification Types [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	201,905		201,905		197,492
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	209		209		208
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial	[1]	63,047		63,047		49,617
Nonaccruing [Member] | Multiple Modification Types [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	16,881		16,881		16,335
Nonaccruing [Member] | Multiple Modification Types [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	79,928		79,928		65,952
Nonaccruing [Member] | Multiple Modification Types [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	3,892		3,892		5,203
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	4,101		4,101		5,411
Nonaccruing [Member] | Multiple Modification Types [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	[1]	705		705		233
Nonaccruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	[1]	6,452		6,452		7,299
Nonaccruing [Member] | Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction	[1]	62		62		44
Nonaccruing [Member] | Multiple Modification Types [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	7,219		7,219		7,576
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[1]	91,248		91,248		78,939
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	42,091		42,091		49,846
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	3,135		3,135		3,156
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial	[2]	18,551		18,551		3,577
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	275		275		34
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	18,826		18,826		3,611
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	2,920		2,920		2,960
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	6,055		6,055		6,116
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	[2]	0		0		0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	[2]	829		829		1,180
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction	[2]	0		0		0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	829		829		1,180
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	[2]	25,710		25,710		10,907
Nonaccruing [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		7,046		7,046		4,350
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		1,116		1,116		1,879
Nonaccruing [Member] | Payment Deferral [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		3,064		3,064		724
Nonaccruing [Member] | Payment Deferral [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		4,180		4,180		2,603
Nonaccruing [Member] | Payment Deferral [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Payment Deferral [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		51		51		54
Nonaccruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		302		302		136
Nonaccruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		42		42		48
Nonaccruing [Member] | Payment Deferral [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		395		395		238
Nonaccruing [Member] | Payment Deferral [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		4,575		4,575		2,841
Nonaccruing [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		21,480		21,480		21,087
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		0		0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		1,359		1,359		1,400
Nonaccruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		1,944		1,944		2,052
Nonaccruing [Member] | Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		16		16		17
Nonaccruing [Member] | Principal Forgiveness [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		3,319		3,319		3,469
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		3,319		3,319		3,469
Nonaccruing [Member] | Maturity Or Team Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		43,011		43,011		11,723
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		312		312		333
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Loans Receivable, Gross, Commercial and Industrial		396		396		455
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,209		1,209		1,669
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Municipal [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		926		926		951
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		2,531		2,531		3,075
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Term [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,163		1,163		0
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		1,475		1,475		333
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Home Equity Credit Line [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity		299		299		500
Nonaccruing [Member] | Maturity Or Team Extension [Member] | One Through Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage		325		325		275
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Gross, Consumer, Construction		97		97		101
Nonaccruing [Member] | Maturity Or Team Extension [Member] | ERROR in label resolution.
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		721		721		876
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 4,727		$ 4,727		$ 4,284
[1]	2 Includes TDRs that resulted from a combination of any of the previous modification types.
[2]	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.

Loans And Allowance For Credi55

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		Mar. 31, 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		$ 286,989	$ 286,189
Financing Receivable, Recorded Investment, Current		41,131,196	40,363,353
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		149,270	147,980
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		137,719	138,209
Loans and Leases Receivable, Gross		41,418,185	40,649,542
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		37,202	32,024
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	392,322	217,427
Commercial		55,997	72,440
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Commercial Real Estate		60,456	65,167
Consumer		9,961	11,082
Outstanding balance		126,414	148,689
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Carrying Amount, Net		106,320	125,029
ALLL		357	945
Carrying amount, net		105,963	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		126,132	97,436
Financing Receivable, Recorded Investment, Current		13,464,106	13,114,045
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		90,610	60,523
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		35,522	36,913
Loans and Leases Receivable, Gross		13,590,238	13,211,481
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		4,388	3,065
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	287,662	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		553	703
Financing Receivable, Recorded Investment, Current		436,597	440,963
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		59	183
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		494	520
Loans and Leases Receivable, Gross		437,150	441,666
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	13,613	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		57,347	64,942
Financing Receivable, Recorded Investment, Current		6,965,082	7,085,086
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		21,987	37,776
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		35,360	27,166
Loans and Leases Receivable, Gross		7,022,429	7,150,028
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		13,350	3,626
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	46,289	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		695,436	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		695,436	675,839
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	46
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	926	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		184,032	170,713
Financing Receivable, Recorded Investment, Current		21,561,221	21,308,301
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		112,656	106,068
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		71,376	64,645
Loans and Leases Receivable, Gross		21,745,253	21,479,014
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		17,738	6,737
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	348,490	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		7,140	6,142
Financing Receivable, Recorded Investment, Current		1,960,562	1,835,360
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,573	842
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		4,567	5,300
Loans and Leases Receivable, Gross		1,967,702	1,841,502
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,533	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		44,074	45,011
Financing Receivable, Recorded Investment, Current		8,782,301	8,469,390
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,173	10,424
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		33,901	34,587
Loans and Leases Receivable, Gross		8,826,375	8,514,401
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		18,295	21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	15,791	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		51,214	51,153
Financing Receivable, Recorded Investment, Current		10,742,863	10,304,750
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		12,746	11,266
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		38,468	39,887
Loans and Leases Receivable, Gross		10,794,077	10,355,903
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		18,295	21,697
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	17,324	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		12,268	8,385
Financing Receivable, Recorded Investment, Current		2,420,364	2,407,972
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		7,015	4,717
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		5,253	3,668
Loans and Leases Receivable, Gross		2,432,632	2,416,357
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	4,604	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		31,723	41,550
Financing Receivable, Recorded Investment, Current		5,386,087	5,340,549
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		10,617	14,828
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		21,106	26,722
Loans and Leases Receivable, Gross		5,417,810	5,382,099
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		321	1,036
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	20,131	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		3,613	10,253
Financing Receivable, Recorded Investment, Current		397,809	374,987
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		3,365	8,593
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		248	1,660
Loans and Leases Receivable, Gross		401,422	385,240
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	1,337
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	355	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		3,448	3,422
Financing Receivable, Recorded Investment, Current		435,092	440,358
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		2,241	1,861
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		1,207	1,561
Loans and Leases Receivable, Gross		438,540	443,780
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		848	1,217
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	1,340	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		691	713
Financing Receivable, Recorded Investment, Current		187,760	186,436
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		630	647
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		61	66
Loans and Leases Receivable, Gross		188,451	187,149
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	78	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		51,743	64,323
Financing Receivable, Recorded Investment, Current		8,827,112	8,750,302
Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due		23,868	30,646
Financing Receivable Recorded Investments, Equal To and Greater Than 90 Days Past Due		27,875	33,677
Loans and Leases Receivable, Gross		8,878,855	8,814,625
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		1,169	3,590
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	$ 26,508	$ 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 Credi56

Loans And Allowance For Credit Losses (Schedule Of Changes In The Accretable Yield For PCI Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Loans And Allowance For Credit Losses [Abstract]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	$ (6,138)	$ (9,583)
Changes in Accretable Yield [Roll Forward]
Balance at beginning of period	39,803	45,055
Disposals and other	1,010	2,178
Balance at end of period	43,105	50,931
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 8,430	$ 13,281

Derivative Instruments And He57

Derivative Instruments And Hedging Activities (Narrative) (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ 20,696,000	$ 4,253,000
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2,997,000	1,016,000
Fair values of derivative assets reduced (increased) by net credit valuation adjustments		5,100,000	3,300,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Future Expected		7,700,000
Total derivatives, Notional amount		5,291,198,000		$ 5,147,068,000
Cash collateral pledged for derivative liabilities		86,000,000
Additional collateral that would be required to be pledge if credit rating was downgraded by one notch		1,900,000
Derivative Instrument, Noninterest Income (Expense)		1,962,000	3,253,000
Derivatives Designated As Hedging Instrument Offset To Interest Expense		$ 0	468,000
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Instrument, Noninterest Income (Expense)	[1]
Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ 20,696,000	4,253,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2,997,000	1,016,000
Total derivatives, Notional amount		$ 1,387,500,000		1,387,500,000
Derivative Instrument, Noninterest Income (Expense)
Derivatives Designated As Hedging Instrument Offset To Interest Expense		$ 0	468,000
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]	20,696,000	4,253,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[1]	2,997,000	1,016,000
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		20,696,000	4,253,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[1]	2,997,000	1,016,000
Total derivatives, Notional amount		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	468,000
Derivatives Not Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total derivatives, Notional amount		3,903,698,000		3,759,568,000
Derivative Instrument, Noninterest Income (Expense)		1,962,000	3,253,000
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Total derivatives, Notional amount		103,989,000		40,314,000
Derivative Instrument, Noninterest Income (Expense)		235,000
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]
Derivative [Line Items]
Total derivatives, Notional amount		3,449,818,000		3,256,190,000
Derivative Instrument, Noninterest Income (Expense)		(509,000)	517,000
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		349,891,000		463,064,000
Derivative Instrument, Noninterest Income (Expense)		2,236,000	$ 2,735,000
Other Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		104,469,000		72,568,000
Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		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		956,000
Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		104,469,000		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		250,000		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		89,771,000		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		14,448,000		17,761,000
Other Liabilities [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative [Line Items]
Gross amounts recognized		$ 104,469,000		$ 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 He58

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
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative [Line Items]
Total derivatives, Notional amount		$ 5,291,198		$ 5,147,068
Amount of derivative gain (loss), recognized in OCI		20,696	$ 4,253
Amount of derivative gain (loss), Reclassified from AOCI to interest income		2,997	1,016
Derivatives instruments, Noninterest income (expense)		1,962	3,253
Derivatives designated as hedging instruments, Offset to interest expense		$ 0	468
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivatives instruments, Noninterest income (expense)	[1]
Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		$ 125,363		77,638
Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		104,469		72,568
Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total derivatives, Notional amount		1,387,500		1,387,500
Amount of derivative gain (loss), recognized in OCI		20,696	4,253
Amount of derivative gain (loss), Reclassified from AOCI to interest income		$ 2,997	1,016
Derivatives instruments, Noninterest income (expense)
Derivatives designated as hedging instruments, Offset to interest expense		$ 0	468
Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Amount of derivative gain (loss), recognized in OCI	[1]	20,696	4,253
Amount of derivative gain (loss), Reclassified from AOCI to interest income	[1]	2,997	1,016
Derivatives Designated As Hedging Instruments [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		22,218		5,461
Derivatives Designated As Hedging Instruments [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		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
Amount of derivative gain (loss), recognized in OCI		20,696	4,253
Amount of derivative gain (loss), Reclassified from AOCI to interest income	[1]	2,997	1,016
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		22,218		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		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	468
Derivatives Not Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total derivatives, Notional amount		3,903,698		3,759,568
Derivatives instruments, Noninterest income (expense)		1,962	3,253
Derivatives Not Designated As Hedging Instruments [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		103,145		72,177
Derivatives Not Designated As Hedging Instruments [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		104,469		71,612
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Total derivatives, Notional amount		349,891		463,064
Derivatives instruments, Noninterest income (expense)		2,236	2,735
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		17,721		20,824
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		14,448		17,761
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Total derivatives, Notional amount		103,989		40,314
Derivatives instruments, Noninterest income (expense)		235
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		740		0
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivatives hedging instruments, liabilities		250		8
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]
Derivative [Line Items]
Total derivatives, Notional amount		3,449,818		3,256,190
Derivatives instruments, Noninterest income (expense)		(509)	517
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member] | Other Assets [Member]
Derivative [Line Items]
Derivatives hedging instruments, assets		84,684		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		89,771		$ 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' Equity59

Debt And Shareholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	Apr. 25, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Debt And Shareholders' Equity [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]		Long-term debt is summarized as follows: (In thousands) March 31, December 31, 2015 Junior subordinated debentures related to trust preferred securities $ 164,950 $ 164,950 Subordinated notes 246,262 246,170 Senior notes 390,367 400,334 Capital lease obligations 869 912 Total $ 802,448 $ 812,366
Junior Subordinated Notes		$ 164,950		$ 164,950
Subordinated Debt		246,262		246,170
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		44,834	$ 13,613
Stockholders' Equity [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(1,875)	$ (481)
Senior Notes		390,367		400,334
Capital Lease Obligations		869		912
Long-term Debt, Gross		$ 802,448		$ 812,366
Preferred Stock, Tender Offer	$ 120,000

Debt And Shareholders' Equity60

Debt And Shareholders' Equity (Schedule Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Debt And Shareholders' Equity [Line Items]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ 20,192	$ 6,957
Interest income expense, net, after tax	78,777	75,279
Income Tax Expense (Benefit)	41,448	51,176
Interest Income (Expense), Net	452,842	417,346
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	44,834	13,613
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(1,875)	(481)
Beginning balance	(54,612)	(128,041)
Other comprehensive income (loss)	42,959	13,132
Ending balance	(11,653)	(114,909)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	6,920	1,088
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	665	0
Other Comprehensive Income (Loss), Tax	27,777	8,045
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Debt And Shareholders' Equity [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	32,168	11,424
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(17)	148
Beginning balance	(18,369)	(91,921)
Other comprehensive income (loss)	32,151	11,572
Ending balance	13,782	(80,349)
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	13,331	2,189
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(1,858)	(629)
Beginning balance	1,546	2,226
Other comprehensive income (loss)	11,473	1,560
Ending balance	13,019	3,786
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)
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	28	(239)
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	1,858	629
Income Tax Expense (Benefit)	1,139	387
Interest Income (Expense), Net	2,997	1,016
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	17	(148)
Income Tax Expense (Benefit)	$ 11	$ (91)

Debt And Shareholders' Equity61

Debt And Shareholders' Equity Schedule of Long-Term Debt Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 164,950	$ 164,950
Subordinated Debt	246,262	246,170
Senior Notes	390,367	400,334
Capital Lease Obligations	869	912
Long-term Debt, Gross	$ 802,448	$ 812,366

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	31.40%	35.70%
Deferred Tax Assets, Net	$ 180		$ 203

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Other noninterest-bearing investments valued under the cost method	$ 23,200		$ 25,300
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	196,600		191,500
Net gains on sale of OREO properties	1,329	$ (374)
Principal amount of other real estate owned property sold	2,100	4,100
OREO Properties [Member]
Derivatives, Fair Value [Line Items]
Net gains on sale of OREO properties	1,800	$ 700
Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair value of AFS securities	8,641,960		7,581,309
Level 3 [Member]
Derivatives, Fair Value [Line Items]
Fair value of AFS securities	0		$ 0
Third Party Pricing Service [Member] | Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair value of AFS securities	$ 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	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading account	$ 65,838	$ 48,168
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	8,641,960	7,581,309
Trading account	65,838	48,168
Total assets	9,304,737	8,172,774
Securities sold, not yet purchased	0	0
Total liabilities	90,021	54,678
Level 2 [Member] | Mutual Funds And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	36,311	38,829
Level 2 [Member] | Bank-owned life insurance [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	$ 489,297	$ 485,978
Level 2 [Member] | Private Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments
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	$ 8,027,667	$ 7,100,844
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	556,073	418,695
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	21,909
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
Level 2 [Member] | Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	107,642	57,319
Other Liabilities, Fair Value Disclosure	90,021	54,678
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	22,958	5,966
Other Liabilities, Fair Value Disclosure	250	835
Level 2 [Member] | Derivatives [Member] | Interest Rate Swaps [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	84,684	51,353
Other Liabilities, Fair Value Disclosure	89,771	53,843
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Total assets	136,289	133,541
Securities sold, not yet purchased	0	0
Total liabilities	0	0
Level 3 [Member] | Private Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	119,222	120,027
Level 3 [Member] | Interest-Only-Strip [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	17,067	13,514
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
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
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
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
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	8,701,885	7,643,116
Trading account	65,838	48,168
Total assets	9,600,851	8,473,516
Securities sold, not yet purchased	6,515	30,158
Total liabilities	193,163	187,167
Estimate of Fair Value Measurement [Member] | Mutual Funds And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	96,236	100,636
Estimate of Fair Value Measurement [Member] | Bank-owned life insurance [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	489,297	485,978
Estimate of Fair Value Measurement [Member] | Private Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other noninterest-bearing investments	119,222	120,027
Estimate of Fair Value Measurement [Member] | Interest-Only-Strip [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	17,067	13,514
Estimate of Fair Value Measurement [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	8,027,667	7,100,844
Estimate of Fair Value Measurement [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	556,073	418,695
Estimate of Fair Value Measurement [Member] | Available-for-sale Securities [Member] | Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	21,909
Estimate of Fair Value Measurement [Member] | Asset-Backed Securities [Member] | Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		22,941
Estimate of Fair Value Measurement [Member] | Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	125,363	78,143
Other Liabilities, Fair Value Disclosure	104,469	72,439
Estimate of Fair Value Measurement [Member] | Derivatives [Member] | Interest Rate Related And Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	22,958	5,966
Other Liabilities, Fair Value Disclosure	250	835
Estimate of Fair Value Measurement [Member] | Derivatives [Member] | Interest Rate Swaps [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	84,684	51,353
Other Liabilities, Fair Value Disclosure	89,771	53,843
Estimate of Fair Value Measurement [Member] | Derivatives [Member] | Foreign Currency Exchange Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	17,721	20,824
Other Liabilities, Fair Value Disclosure	14,448	17,761
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	59,925	61,807
Total assets	159,825	167,201
Securities sold, not yet purchased	6,515	30,158
Total liabilities	103,142	132,489
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	59,925	61,807
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	17,721	20,824
Other Liabilities, Fair Value Disclosure	14,448	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	17,721	20,824
Other Liabilities, Fair Value Disclosure	$ 14,448	$ 17,761

Fair Value (Schedule Of Asset65

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
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total net gains (losses) included in, Other noninterest expense	$ 50,134	$ 53,947
Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	$ 0	4,164
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale		2
Total net gains (losses) included in, Fixed income securities gains (losses), net		31
Total net gains (losses) included in, Other comprehensive income (loss)		127
Total net gains (losses) included in, Sales
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(1,859)
Fair value of assets, Ending balance	$ 0	2,465
Banks, Trust and Insurance, Equities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	$ 0	393,007
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale		257
Total net gains (losses) included in, Fixed income securities gains (losses), net		(323)
Total net gains (losses) included in, Other comprehensive income (loss)		(6,949)
Fair Value of Securities Reclassified from HTM to AFS		57,308
Total net gains (losses) included in, Sales		2,613
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(2,349)
Fair value of assets, Ending balance	$ 0	438,338
Other Asset-Backed [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	$ 0	$ 4,786
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
Total net gains (losses) included in, Other comprehensive income (loss)		$ 42
Total net gains (losses) included in, Sales
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		$ (2)
Fair value of assets, Ending balance	$ 0	4,826
Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets, Beginning balance	120,027	99,865
Total net gains (losses) included in, Dividends and other investment income	(1,484)	1,074
Total net gains (losses) included in, Equity securities gains, net	(2,009)	3,253
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	2,801	5,052
Total net gains (losses) included in, Sales	(36)	(1,517)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(77)	(279)
Fair value of assets, Ending balance	119,222	107,448
Servicing Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of liabilities, Beginning balance	13,514	12,227
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Noninterest Income	3,460	4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	368	171
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(275)	(401)
Fair value of liabilities, Ending balance	17,067	12,001
Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of liabilities, Beginning balance	$ 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
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	82,179		$ 84,570
Other Liabilities, Fair Value Disclosure	82,179		84,570
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	82,179		84,570
Other Liabilities, Fair Value Disclosure	$ 82,179		$ 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
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
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	$ (292)
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		31
Fair Value, Assets Measured On Recurring Basis, And Gain (Loss) Included In Accretion Of Purchase Discount On Securities Available-For-Sale		$ 2
Estimate of Fair Value Measurement [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	82,179		$ 84,570
Other Liabilities, Fair Value Disclosure	$ 82,179		$ 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	Mar. 31, 2016	Dec. 31, 2015
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 Asset68

Fair Value (Schedule Of Assets With Fair Value Changes On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Principal amount of other real estate owned property sold	$ 2,100	$ 4,100
Gains (losses) from fair value changes	(15,107)	(5,085)
Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains (losses) from fair value changes	(14,728)	(2,924)
Private Equity Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains (losses) from fair value changes	(342)	(1,153)
Other Real Estate Owned [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains (losses) from fair value changes	(37)	$ (1,008)
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
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
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
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
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	33,857		13,379
Level 2 [Member] | Impaired Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	32,162		10,991
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
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	1,695		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		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
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		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
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of assets measured on nonrecurring basis	35,334		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	32,162		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		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	$ 1,695		$ 2,388

Fair Value (Schedule Of Carryin

Fair Value (Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Long-term debt (less fair value hedges)	$ 802,448	$ 812,366
Carrying Value [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Loans and leases (including loans held for sale), net of allowance	40,915,055	40,193,374
Time deposits	2,071,688	2,130,680
Interest-bearing Deposit Liabilities, Foreign	219,899	294,391
Long-term debt (less fair value hedges)	802,448	812,366
Estimate of Fair Value Measurement [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Held-to-maturity, fair value	636,484	552,088
Loans and leases (including loans held for sale), net of allowance	40,715,842	39,535,365
Time deposits	2,075,729	2,129,742
Foreign deposits	219,836	294,321
Long-term debt (less fair value hedges)	$ 831,621	$ 838,796

Commitments, Guarantees, And 70

Commitments, Guarantees, And Contingent Liabilities (Narrative) (Details) $ in Millions	Mar. 31, 2016USD ($)
Guarantor Obligations [Line Items]
Letters of credit, accrued liability	$ 5.1
Reserve for unfunded lending commitments	2.1
Deferred commitment fees	3
Guarantee of trust preferred securities issued by affiliated trusts	165
Commitments for Private Equity and Other Noninterest-bearing Investments	20
Range of possible loss, minimum	0
Range of possible loss, maximum	$ 60

Commitments, Guarantees, And 71

Commitments, Guarantees, And Contingent Liabilities (Schedule Of Guarantees Issued) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Unused Commitments to Extend Credit	$ 17,310,427	$ 17,169,785
Commercial Letters Of Credit	58,567	18,447
Total Unfunded Lending Commitments	18,216,165	18,066,629
Financial [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Standby letters of credit	643,514	661,554
Performance [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Standby letters of credit	$ 203,657	$ 216,843

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
	Mar. 31, 2016	Mar. 31, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	1,762	1,783
Expected return on plan assets	(2,754)	(3,090)
Amortization of net actuarial (gain) loss	1,659	1,574
Net periodic benefit cost (credit)	667	267
Supplemental Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	100	101
Amortization of prior service cost (credit)	0	0
Amortization of net actuarial (gain) loss	31	31
Net periodic benefit cost (credit)	131	132
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	8
Interest cost	10	10
Amortization of prior service cost (credit)	0	0
Amortization of net actuarial (gain) loss	(17)	(13)
Net periodic benefit cost (credit)	$ (2)	$ 5

Operating Segment Information73

Operating Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016USD ($)Branches	Mar. 31, 2015USD ($)	Jun. 30, 2015USD ($)
Segment Reporting Information [Line Items]
Realized Losses on Sales of CDOs			$ 137,000
Net interest income	$ 452,842	$ 417,346
Provision for loan losses	42,145	(1,494)
Net interest income after provision for loan losses	410,697	418,840
Other noninterest income	2,894	922
Noninterest expense	395,573	392,977
Income before income taxes	131,885	143,201
Income Tax Expense (Benefit)	41,448	51,176
Net income	90,437	92,025
Zions Bank [Member]
Segment Reporting Information [Line Items]
Net interest income	153,300	152,000
Provision for loan losses	(30,600)	(4,600)
Net interest income after provision for loan losses	183,900	156,600
Other noninterest income	36,000	31,500
Noninterest expense	97,000	107,500
Net income	122,900	80,600
Total loans	12,306,000	12,101,000
Total deposits	15,700,000	15,787,000
Amegy [Member]
Segment Reporting Information [Line Items]
Net interest income	119,200	117,800
Provision for loan losses	104,500	11,100
Net interest income after provision for loan losses	14,700	106,700
Other noninterest income	29,100	29,200
Noninterest expense	85,600	93,000
Net income	(41,800)	42,900
Total loans	10,370,000	10,276,000
Total deposits	$ 11,274,000	11,524,000
Number of branches | Branches	76
California Bank Trust [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 108,100	103,800
Provision for loan losses	(3,100)	(4,100)
Net interest income after provision for loan losses	111,200	107,900
Other noninterest income	16,100	14,200
Noninterest expense	68,500	74,100
Net income	58,800	48,000
Total loans	8,905,000	8,502,000
Total deposits	$ 10,479,000	9,701,000
Number of branches | Branches	94
NBA [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 46,800	44,200
Provision for loan losses	1,900	800
Net interest income after provision for loan losses	44,900	43,400
Other noninterest income	9,500	8,200
Noninterest expense	32,400	37,200
Net income	22,000	14,400
Total loans	3,863,000	3,764,000
Total deposits	$ 4,445,000	4,178,000
Number of branches | Branches	65
Nevada State Bank [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 30,900	31,100
Provision for loan losses	(25,600)	(8,700)
Net interest income after provision for loan losses	56,500	39,800
Other noninterest income	9,500	8,900
Noninterest expense	30,800	32,600
Net income	35,200	16,100
Total loans	2,263,000	2,384,000
Total deposits	$ 4,005,000	3,755,000
Number of branches | Branches	49
Vectra Bank Colorado [Member]
Segment Reporting Information [Line Items]
Net interest income	$ 30,500	28,500
Provision for loan losses	(3,200)	3,900
Net interest income after provision for loan losses	33,700	24,600
Other noninterest income	5,800	5,000
Noninterest expense	21,400	24,000
Net income	18,100	5,600
Total loans	2,453,000	2,358,000
Total deposits	2,759,000	2,456,000
TCBW [Member]
Segment Reporting Information [Line Items]
Net interest income	9,400	8,400
Provision for loan losses	(1,800)	200
Net interest income after provision for loan losses	11,200	8,200
Other noninterest income	900	900
Noninterest expense	5,000	7,800
Net income	7,100	1,300
Total loans	733,000	713,000
Total deposits	953,000	830,000
Other Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	(45,400)	(68,400)
Provision for loan losses	0	(100)
Net interest income after provision for loan losses	(45,400)	(68,300)
Other noninterest income	9,900	19,400
Noninterest expense	54,900	16,800
Net income	(90,400)	(65,700)
Total loans	110,000	81,000
Total deposits	(60,000)	(747,000)
Consolidated Entities [Member]
Segment Reporting Information [Line Items]
Net interest income	452,800	417,400
Provision for loan losses	42,100	(1,500)
Net interest income after provision for loan losses	410,700	418,900
Other noninterest income	116,800	117,300
Noninterest expense	395,600	393,000
Net income	131,900	143,200
Total loans	41,003,000	40,179,000
Total deposits	$ 49,555,000	$ 47,484,000
Utah [Member] | Zions Bank [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	99
Idaho [Member] | Zions Bank [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	24
WYOMING | Zions Bank [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1
Colorado [Member] | Vectra Bank Colorado [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	36
New Mexico [Member] | Vectra Bank Colorado [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1
WASHINGTON | TCBW [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1
OREGON | TCBW [Member]
Segment Reporting Information [Line Items]
Number of branches | Branches	1