Commerce Bancshares (CBSH) 10-Q 7 Nov 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 02, 2016
Document And Entity Information [Abstract]
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Type	10-Q
Amendment Flag	false
Document Fiscal Period Focus	Q3
Entity Registrant Name	COMMERCE BANCSHARES INC /MO/
Current Fiscal Year End Date	--12-31
Entity Central Index Key	22,356
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		96,592,152

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Loans	$ 13,230,241	$ 12,436,692
Allowance for loan losses	(154,532)	(151,532)
Net loans	13,075,709	12,285,160
Loans held for sale	9,511	7,607
Investment securities:
Available-for-sale Securities	9,438,871	9,777,004
Trading	28,586	11,890
Non-marketable	108,224	112,786
Total investment securities	9,575,681	9,901,680
Federal funds sold and short-term securities purchased under agreements to resell	13,415	14,505
Long-term securities purchased under agreements to resell	725,000	875,000
Interest earning deposits with banks	56,767	23,803
Cash and due from banks	396,938	464,411
Land, buildings and equipment, net	339,196	352,581
Goodwill	138,921	138,921
Other intangible assets, net	6,621	6,669
Other assets	396,709	534,625
Total assets	24,734,468	24,604,962
Deposits:
Non-interest bearing	7,130,415	7,146,398
Savings, interest checking and money market	11,023,526	10,834,746
Time open and C.D.'s of less than $100,000	732,575	785,191
Time open and C.D.'s, $100,000 or More	1,279,644	1,212,518
Total deposits	20,166,160	19,978,853
Federal funds purchased and securities sold under agreements to repurchase	1,489,891	1,963,552
Other Borrowings	101,415	103,818
Other liabilities	416,189	191,321
Total liabilities	22,173,655	22,237,544
Commerce Bancshares, Inc. stockholders' equity:
Preferred stock	144,784	144,784
Common stock	489,862	489,862
Capital surplus	1,335,150	1,337,677
Retained earnings	515,081	383,313
Treasury stock, at cost	(50,538)	(26,116)
Accumulated other comprehensive income	121,082	32,470
Total Commerce Bancshares, Inc. stockholders' equity	2,555,421	2,361,990
Non-controlling interest	5,392	5,428
Total equity	2,560,813	2,367,418
Total liabilities and equity	$ 24,734,468	$ 24,604,962

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Mortgage Loans:
Mortgages Held-for-sale, Fair Value Disclosure	$ 4,447,000	$ 4,981,000
Investment Securities:
Available-for-sale Securities Pledged as Collateral	$ 578,090,000	$ 568,257,000
Stockholders' Equity:
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	6,000	6,000
Common stock, par value	$ 5	$ 5
Common Stock, Shares Authorized	120,000,000	120,000,000
Common stock, shares issued	97,972,433	97,972,433
Treasury stock, shares	1,212,837	603,003

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
INTEREST INCOME
Interest and fees on loans	$ 123,750	$ 114,954	$ 364,234		$ 339,707
Interest and fees on loans held for sale	334	48	1,161		108
Interest on investment securities	51,661	50,716	155,250		142,416
Interest on federal funds sold and short-term securities purchased under agreements to resell	20	21	63		45
Interest on long-term securities purchased under agreements to resell	3,328	3,273	10,157		9,994
Interest on deposits with banks	268	103	689		404
Total interest income	179,361	169,115	531,554		492,674
INTEREST EXPENSE
Savings, interest checking and money market	3,619	3,356	10,651		9,951
Time open and C.D.'s of less than $100,000	683	786	2,134		2,484
Time open and C.D.'s of $100,000 and over	2,186	1,554	6,519		4,468
Interest on federal funds purchased and securities sold under agreements to repurchase	724	483	2,337		1,271
Interest on other borrowings	906	898	3,066		2,667
Total interest expense	8,118	7,077	24,707		20,841
Net interest income	171,243	162,038	506,847		471,833
Provision for loan losses	7,263	8,364	25,918		19,541
Net interest income after provision for loan losses	163,980	153,674	480,929		452,292
NON-INTEREST INCOME
Bank card transaction fees	47,006	44,635	136,541		132,606
Trust fees	30,951	29,302	90,435		88,815
Deposit account charges and other fees	22,241	20,674	64,260		58,810
Capital market fees	2,751	2,620	7,976		8,360
Consumer brokerage services	3,375	3,687	10,375		10,530
Loan fees and sales	3,123	1,855	8,829		6,127
Other	9,872	8,515	36,497		26,849
Total non-interest income	119,319	111,288	354,913		332,097
INVESTMENT SECURITIES GAINS (LOSSES), NET
Investment securities gains (losses), net	(1,965)	(378)	(3,704)	[1]	7,800	[1]
NON-INTEREST EXPENSE
Salaries and employee benefits	107,004	100,874	318,671		298,603
Net occupancy	12,366	11,247	34,761		33,807
Equipment	4,842	4,789	14,257		14,171
Supplies and communication	5,968	5,609	18,490		16,416
Data processing and software	23,663	21,119	69,332		61,670
Marketing	4,399	4,343	12,601		12,568
Deposit insurance	3,576	2,981	9,884		9,001
Other	19,424	20,440	57,808		54,474
Total non-interest expense	181,242	171,402	535,804		500,710
Income before income taxes	100,092	93,182	296,334		291,479
Less income taxes	30,942	27,969	91,854		88,929
Net income	69,150	65,213	204,480		202,550
Less non-controlling interest expense (income)	605	601	668		2,530
Net income attributable to Commerce Bancshares, Inc.	68,545	64,612	203,812		200,020
Preferred Stock Dividends	2,250	2,250	6,750		6,750
Net Income (Loss) Available to Common Stockholders	$ 66,295	$ 62,362	$ 197,062		$ 193,270
Net income per common share - basic	$ 0.69	$ 0.63	$ 2.04		$ 1.93
Net income per common share - diluted	$ 0.68	$ 0.63	$ 2.03		$ 1.93
[1]	Available for sale and non-marketable securities

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 69,150	$ 65,213	$ 204,480	$ 202,550
Other comprehensive income (loss)
Net unrealized gains (losses) on securities for which a portion of an other-than-temporary impairment has been recorded in earnings	46	(327)	(352)	(306)
Net unrealized gains (losses) on other securities	(13,747)	16,891	87,887	2,754
Pension loss amortization	359	283	1,077	1,095
Other comprehensive income (loss), net of tax	(13,342)	16,847	88,612	3,543
Comprehensive income	55,808	82,060	293,092	206,093
Non-controlling interest expense (income)	605	601	668	2,530
Comprehensive income attributable to Commerce Bancshares, Inc	$ 55,203	$ 81,459	$ 292,424	$ 203,563

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Non-Controlling Interest [Member]
Balance at Dec. 31, 2014	$ 2,334,246	$ 144,784	$ 484,155	$ 1,229,075	$ 426,648	$ (16,562)	$ 62,093	$ 4,053
Net income	202,550				200,020			2,530
Other comprehensive income (loss)	3,543						3,543
Distributions to non-controlling interest	(845)							(845)
Purchase of treasury stock	(9,147)					(9,147)
Accelerated stock repurchase agreement	(100,000)			60,000		(160,000)
Issuance of stock under purchase and equity compensation plans	1,914			(15,302)		17,216
Net tax benefit related to equity compensation plans	1,871			1,871
Stock-based compensation	7,702			7,702
Cash dividends per share, Common Stock, Cash	(64,041)				(64,041)
Dividends per share, Preferred Stock, Cash	(6,750)				(6,750)
Balance at Sep. 30, 2015	2,371,043	144,784	484,155	1,283,346	555,877	(168,493)	65,636	5,738
Balance at Dec. 31, 2015	2,367,418	144,784	489,862	1,337,677	383,313	(26,116)	32,470	5,428
Net income	204,480				203,812			668
Other comprehensive income (loss)	88,612						88,612
Distributions to non-controlling interest	(704)							(704)
Purchase of treasury stock	(38,476)					(38,476)
Issuance of stock under purchase and equity compensation plans	(3)			(14,057)		14,054
Net tax benefit related to equity compensation plans	2,629			2,629
Stock-based compensation	8,901			8,901
Cash dividends per share, Common Stock, Cash	(65,294)				(65,294)
Dividends per share, Preferred Stock, Cash	(6,750)				(6,750)
Balance at Sep. 30, 2016	$ 2,560,813	$ 144,784	$ 489,862	$ 1,335,150	$ 515,081	$ (50,538)	$ 121,082	$ 5,392

Consolidated Statements Of Cha7

Consolidated Statements Of Changes In Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, per share, cash paid	$ 0.675	$ 0.643
Preferred Stock, Dividends, per share, cash paid	$ 1.125	$ 1.125

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES:
Net income		$ 204,480	$ 202,550
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		25,918	19,541
Provision for depreciation and amortization		30,997	32,100
Amortization of investment security premiums, net		23,357	23,249
Investment securities gains (losses), net	[1]	3,704	(7,800)
Net gains on sales of loans held for sale		(4,924)	(2,184)
Origination of loans held for sale		(115,768)	(75,589)
Proceeds from sales and repayments of held for sale		117,746	72,973
Net (increase) decrease in trading securities, excluding unsettled transactions		77,262	(5,042)
Stock-based compensation		8,901	7,702
(Increase) decrease in interest receivable		(331)	(2,652)
Increase (decrease) in interest payable		269	(96)
Increase (decrease) in income taxes payable		1,787	16,312
Net (excess) tax benefit related to equity compensation plans		(2,629)	(1,871)
Other changes, net		(24,602)	(365)
Net cash provided by (used in) operating activities		346,167	278,828
INVESTING ACTIVITIES:
Proceeds from sales of investment securities	[1]	7,946	684,893
Proceeds from maturities/pay downs of investment securities	[1]	1,659,778	1,923,785
Purchases of investment securities	[1]	(1,080,003)	(2,507,803)
Net (increase) decrease in loans		(817,886)	(782,559)
Repayments of long-term securities purchased under agreements to resell		150,000	75,000
Purchases of land, buildings and equipment		(18,479)	(22,718)
Sales of land, buildings and equipment		5,831	4,752
Net cash provided by (used in) investing activities		(92,813)	(624,650)
FINANCING ACTIVITIES:
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		280,495	(319,853)
Net increase (decrease) in time open and C.D.'s		14,510	(130,591)
Net increase (decrease) in federal funds purchased and short-term securities sold under agreements to repurchase		(473,661)	330,679
Repayment of long-term borrowings		(3,872)	(227)
Additional long-term borrowings		1,469	0
Purchases of treasury stock		(38,476)	(9,147)
Accelerated stock repurchase agreement net outflow		0	(100,000)
Issuance of stock under equity compensation plans		(3)	1,914
Excess (net) tax benefit related to equity compensation plans		2,629	1,871
Cash dividends paid on common stock		(65,294)	(64,041)
Cash dividends paid on preferred stock		(6,750)	(6,750)
Net cash provided by (used in) financing activities		(288,953)	(296,145)
Increase (decrease) in cash and cash equivalents		(35,599)	(641,967)
Cash and cash equivalents at beginning of year		502,719	1,100,717
Cash and cash equivalents at end of period		467,120	458,750
Supplemental Cash Flow Information:
Income tax payments, net		88,531	70,860
Interest paid on deposits and borrowings		24,438	20,937
Loans transferred to foreclosed real estate		1,031	2,459
Transfer of loans held for investment to held for sale		42,688	0
Settlement of accelerated share repurchase agreement and receipt of treasury stock		$ 0	$ 60,000
[1]	Available for sale and non-marketable securities

Principles Of Consolidation And

Principles Of Consolidation And Presentation	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles Of Consolidation And Presentation	Principles of Consolidation and Presentation The accompanying consolidated financial statements include the accounts of Commerce Bancshares, Inc. and all majority-owned subsidiaries (the Company). Most of the Company's operations are conducted by its subsidiary bank, Commerce Bank (the Bank). The consolidated financial statements in this report have not been audited by an independent registered public accounting firm, but in the opinion of management, all adjustments necessary to present fairly the financial position and the results of operations for the interim periods have been made. All such adjustments are of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated. Certain reclassifications were made to 2015 data to conform to current year presentation. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. Management has evaluated subsequent events for potential recognition or disclosure. The results of operations for the three and nine month periods ended September 30, 2016 are not necessarily indicative of results to be attained for the full year or any other interim period. The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission. Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the Company's most recent Annual Report on Form 10-K, containing the latest audited consolidated financial statements and notes thereto.

Loans And Allowance For Loan Lo

Loans And Allowance For Loan Losses	9 Months Ended
	Sep. 30, 2016
Loans And Allowance For Loan Losses [Abstract]
Loans And Allowance For Loan Losses	Loans and Allowance for Loan Losses Major classifications within the Company’s held for investment loan portfolio at September 30, 2016 and December 31, 2015 are as follows: (In thousands) September 30, 2016 December 31, 2015 Commercial: Business $ 4,770,883 $ 4,397,893 Real estate – construction and land 800,545 624,070 Real estate – business 2,520,528 2,355,544 Personal Banking: Real estate – personal 1,968,005 1,915,953 Consumer 1,972,969 1,924,365 Revolving home equity 417,591 432,981 Consumer credit card 760,022 779,744 Overdrafts 19,698 6,142 Total loans $ 13,230,241 $ 12,436,692 At September 30, 2016 , loans of $3.6 billion were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. Additional loans of $1.6 billion were pledged at the Federal Reserve Bank as collateral for discount window borrowings. Allowance for loan losses A summary of the activity in the allowance for loan losses during the three and nine months ended September 30, 2016 and 2015 , respectively, follows: For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total Balance at beginning of period $ 89,198 $ 64,634 $ 153,832 $ 82,086 $ 69,446 $ 151,532 Provision (1,411 ) 8,674 7,263 4,309 21,609 25,918 Deductions: Loans charged off 291 11,872 12,163 2,465 35,633 38,098 Less recoveries on loans 2,759 2,841 5,600 6,325 8,855 15,180 Net loan charge-offs (recoveries) (2,468 ) 9,031 6,563 (3,860 ) 26,778 22,918 Balance September 30, 2016 $ 90,255 $ 64,277 $ 154,532 $ 90,255 $ 64,277 $ 154,532 Balance at beginning of period $ 86,329 $ 65,203 $ 151,532 $ 89,622 $ 66,910 $ 156,532 Provision (1,976 ) 10,340 8,364 (6,089 ) 25,630 19,541 Deductions: Loans charged off 903 11,321 12,224 3,035 34,194 37,229 Less recoveries on loans 1,167 2,693 3,860 4,119 8,569 12,688 Net loan charge-offs (recoveries) (264 ) 8,628 8,364 (1,084 ) 25,625 24,541 Balance September 30, 2015 $ 84,617 $ 66,915 $ 151,532 $ 84,617 $ 66,915 $ 151,532 The following table shows the balance in the allowance for loan losses and the related loan balance at September 30, 2016 and December 31, 2015 , disaggregated on the basis of impairment methodology. Impaired loans evaluated under ASC 310-10-35 include loans on non-accrual status, which are individually evaluated for impairment, and other impaired loans discussed below, which are deemed to have similar risk characteristics and are collectively evaluated. All other loans are collectively evaluated for impairment under ASC 450-20. Impaired Loans All Other Loans (In thousands) Allowance for Loan Losses Loans Outstanding Allowance for Loan Losses Loans Outstanding September 30, 2016 Commercial $ 1,816 $ 44,526 $ 88,439 $ 8,047,430 Personal Banking 1,253 20,594 63,024 5,117,691 Total $ 3,069 $ 65,120 $ 151,463 $ 13,165,121 December 31, 2015 Commercial $ 1,927 $ 43,027 $ 80,159 $ 7,334,480 Personal Banking 1,557 22,287 67,889 5,036,898 Total $ 3,484 $ 65,314 $ 148,048 $ 12,371,378 Impaired loans The table below shows the Company’s investment in impaired loans at September 30, 2016 and December 31, 2015 . These loans consist of all loans on non-accrual status and other restructured loans whose terms have been modified and classified as troubled debt restructurings. These restructured loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. They are discussed further in the "Troubled debt restructurings" section on page 14. (In thousands) Sept. 30, 2016 Dec. 31, 2015 Non-accrual loans $ 15,645 $ 26,575 Restructured loans (accruing) 49,475 38,739 Total impaired loans $ 65,120 $ 65,314 The following table provides additional information about impaired loans held by the Company at September 30, 2016 and December 31, 2015 , segregated between loans for which an allowance for credit losses has been provided and loans for which no allowance has been provided. (In thousands) Recorded Investment Unpaid Principal Balance Related Allowance September 30, 2016 With no related allowance recorded: Business $ 7,053 $ 10,018 $ — Real estate – construction and land 1,228 1,594 — $ 8,281 $ 11,612 $ — With an allowance recorded: Business $ 28,369 $ 30,171 $ 1,284 Real estate – construction and land 214 219 18 Real estate – business 7,662 9,077 514 Real estate – personal 6,703 9,564 602 Consumer 5,537 5,537 66 Revolving home equity 636 646 18 Consumer credit card 7,718 7,718 567 $ 56,839 $ 62,932 $ 3,069 Total $ 65,120 $ 74,544 $ 3,069 December 31, 2015 With no related allowance recorded: Business $ 9,330 $ 11,777 $ — Real estate – construction and land 2,961 8,956 — Real estate – business 4,793 6,264 — Real estate – personal 373 373 — $ 17,457 $ 27,370 $ — With an allowance recorded: Business $ 18,227 $ 20,031 $ 1,119 Real estate – construction and land 1,227 2,804 63 Real estate – business 6,489 9,008 745 Real estate – personal 7,667 10,530 831 Consumer 5,599 5,599 63 Revolving home equity 704 852 67 Consumer credit card 7,944 7,944 596 $ 47,857 $ 56,768 $ 3,484 Total $ 65,314 $ 84,138 $ 3,484 Total average impaired loans for the three and nine month periods ended September 30, 2016 and 2015 , respectively, are shown in the table below. (In thousands) Commercial Personal Banking Total Average Impaired Loans: For the three months ended September 30, 2016 Non-accrual loans $ 15,106 $ 3,928 $ 19,034 Restructured loans (accruing) 31,372 17,082 48,454 Total $ 46,478 $ 21,010 $ 67,488 For the nine months ended September 30, 2016 Non-accrual loans $ 19,387 $ 4,336 $ 23,723 Restructured loans (accruing) 29,117 17,359 46,476 Total $ 48,504 $ 21,695 $ 70,199 For the three months ended September 30, 2015 Non-accrual loans $ 21,119 $ 5,179 $ 26,298 Restructured loans (accruing) 13,399 18,221 31,620 Total $ 34,518 $ 23,400 $ 57,918 For the nine months ended September 30, 2015 Non-accrual loans $ 25,784 $ 5,791 $ 31,575 Restructured loans (accruing) 16,612 18,854 35,466 Total $ 42,396 $ 24,645 $ 67,041 The table below shows interest income recognized during the three and nine month periods ended September 30, 2016 and 2015 , respectively, for impaired loans held at the end of each respective period. This interest all relates to accruing restructured loans, as discussed in the "Troubled debt restructurings" section on page 14. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2016 2015 2016 2015 Interest income recognized on impaired loans: Business $ 277 $ 63 $ 830 $ 188 Real estate – construction and land 2 22 7 66 Real estate – business 42 33 126 99 Real estate – personal 39 47 118 142 Consumer 89 87 267 261 Revolving home equity 7 6 22 17 Consumer credit card 174 186 522 558 Total $ 630 $ 444 $ 1,892 $ 1,331 Delinquent and non-accrual loans The following table provides aging information on the Company’s past due and accruing loans, in addition to the balances of loans on non-accrual status, at September 30, 2016 and December 31, 2015 . (In thousands) Current or Less Than 30 Days Past Due 30 – 89 Days Past Due 90 Days Past Due and Still Accruing Non-accrual Total September 30, 2016 Commercial: Business $ 4,758,519 $ 3,100 $ 506 $ 8,758 $ 4,770,883 Real estate – construction and land 794,731 2,357 2,147 1,310 800,545 Real estate – business 2,513,270 5,011 327 1,920 2,520,528 Personal Banking: Real estate – personal 1,954,889 6,901 2,581 3,634 1,968,005 Consumer 1,951,011 19,510 2,448 — 1,972,969 Revolving home equity 414,251 2,246 1,071 23 417,591 Consumer credit card 742,820 9,366 7,836 — 760,022 Overdrafts 19,254 444 — — 19,698 Total $ 13,148,745 $ 48,935 $ 16,916 $ 15,645 $ 13,230,241 December 31, 2015 Commercial: Business $ 4,384,149 $ 2,306 $ 564 $ 10,874 $ 4,397,893 Real estate – construction and land 617,838 3,142 — 3,090 624,070 Real estate – business 2,340,919 6,762 — 7,863 2,355,544 Personal Banking: Real estate – personal 1,901,330 7,117 3,081 4,425 1,915,953 Consumer 1,903,389 18,273 2,703 — 1,924,365 Revolving home equity 427,998 2,641 2,019 323 432,981 Consumer credit card 762,750 8,894 8,100 — 779,744 Overdrafts 5,834 308 — — 6,142 Total $ 12,344,207 $ 49,443 $ 16,467 $ 26,575 $ 12,436,692 Credit quality The following table provides information about the credit quality of the Commercial loan portfolio, using the Company’s internal rating system as an indicator. The internal rating system is a series of grades reflecting management’s risk assessment, based on its analysis of the borrower’s financial condition. The “pass” category consists of a range of loan grades that reflect increasing, though still acceptable, risk. Movement of risk through the various grade levels in the “pass” category is monitored for early identification of credit deterioration. The “special mention” rating is applied to loans where the borrower exhibits negative financial trends due to borrower specific or systemic conditions that, if left uncorrected, threaten its capacity to meet its debt obligations. The borrower is believed to have sufficient financial flexibility to react to and resolve its negative financial situation. It is a transitional grade that is closely monitored for improvement or deterioration. The “substandard” rating is applied to loans where the borrower exhibits well-defined weaknesses that jeopardize its continued performance and are of a severity that the distinct possibility of default exists. Loans are placed on “non-accrual” when management does not expect to collect payments consistent with acceptable and agreed upon terms of repayment. Commercial Loans (In thousands) Business Real Estate-Construction Real Estate- Business Total September 30, 2016 Pass $ 4,625,175 $ 798,168 $ 2,421,327 $ 7,844,670 Special mention 76,105 860 46,281 123,246 Substandard 60,845 207 51,000 112,052 Non-accrual 8,758 1,310 1,920 11,988 Total $ 4,770,883 $ 800,545 $ 2,520,528 $ 8,091,956 December 31, 2015 Pass $ 4,278,857 $ 618,788 $ 2,281,565 $ 7,179,210 Special mention 49,302 1,033 15,009 65,344 Substandard 58,860 1,159 51,107 111,126 Non-accrual 10,874 3,090 7,863 21,827 Total $ 4,397,893 $ 624,070 $ 2,355,544 $ 7,377,507 The credit quality of Personal Banking loans is monitored primarily on the basis of aging/delinquency, and this information is provided in the table in the above "Delinquent and non-accrual loans" section. In addition, FICO scores are obtained and updated on a quarterly basis for most of the loans in the Personal Banking portfolio. This is a published credit score designed to measure the risk of default by taking into account various factors from a borrower's financial history. The Bank normally obtains a FICO score at the loan's origination and renewal dates, and updates are obtained on a quarterly basis. Excluded from the table below are certain Personal Banking loans for which FICO scores are not obtained because they generally pertain to commercial customer activities and are often underwritten with other collateral considerations. At September 30, 2016 , these were comprised of $251.7 million in personal real estate loans, or 4.9% of the Personal Banking portfolio, compared to $257.8 million at December 31, 2015 . For the remainder of loans in the Personal Banking portfolio, the table below shows the percentage of balances outstanding at September 30, 2016 and December 31, 2015 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card September 30, 2016 FICO score: Under 600 1.4 % 4.2 % 1.2 % 4.0 % 600 - 659 3.0 8.5 3.8 11.9 660 - 719 10.3 21.0 13.2 31.4 720 - 779 24.8 26.5 28.1 28.4 780 and over 60.5 39.8 53.7 24.3 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2015 FICO score: Under 600 1.5 % 4.5 % 1.5 % 3.9 % 600 - 659 3.0 9.7 3.9 12.0 660 - 719 9.1 21.8 13.6 31.7 720 - 779 25.0 26.4 28.4 27.9 780 and over 61.4 37.6 52.6 24.5 Total 100.0 % 100.0 % 100.0 % 100.0 % Troubled debt restructurings As mentioned previously, the Company's impaired loans include loans which have been classified as troubled debt restructurings. Total restructured loans amounted to $59.0 million at September 30, 2016 . Restructured loans are those extended to borrowers who are experiencing financial difficulty and who have been granted a concession. Restructured loans are placed on non-accrual status if the Company does not believe it probable that amounts due under the contractual terms will be collected, and those non-accrual loans totaled $9.6 million at September 30, 2016 . Other performing restructured loans totaled $49.5 million at September 30, 2016 . These include certain business, construction and business real estate loans classified as substandard. Upon maturity, the loans renewed at interest rates judged not to be market rates for new debt with similar risk and as a result the loans were classified as troubled debt restructurings. These commercial loans totaled $33.2 million at September 30, 2016 . These restructured loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. Troubled debt restructurings also include certain credit card loans under various debt management and assistance programs, which totaled $7.7 million at September 30, 2016 . Modifications to credit card loans generally involve removing the available line of credit, placing loans on amortizing status, and lowering the contractual interest rate. The Company has classified additional loans as troubled debt restructurings because they were not reaffirmed by the borrower in bankruptcy proceedings. At September 30, 2016 , these loans totaled $8.2 million in personal real estate, revolving home equity, and consumer loans. Interest on these loans is being recognized on an accrual basis, as the borrowers are continuing to make payments under the terms of the loan agreements. The following table shows the outstanding balances of loans classified as troubled debt restructurings at September 30, 2016 , in addition to the outstanding balances of these restructured loans which the Company considers to have been in default at any time during the past twelve months. For purposes of this disclosure, the Company considers "default" to mean 90 days or more past due as to interest or principal. (In thousands) September 30, 2016 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 34,227 $ — Real estate - construction and land 784 676 Real estate - business 5,742 751 Personal Banking: Real estate - personal 4,387 358 Consumer 5,560 62 Revolving home equity 613 67 Consumer credit card 7,718 537 Total restructured loans $ 59,031 $ 2,451 For those loans on non-accrual status also classified as restructured, the modification did not create any further financial effect on the Company as those loans were already recorded at net realizable value. For those performing commercial loans classified as restructured, there were no concessions involving forgiveness of principal or interest and, therefore, there was no financial impact to the Company as a result of modification to these loans. No financial impact resulted from those performing loans where the debt was not reaffirmed in bankruptcy, as no changes to loan terms occurred in that process. The effects of modifications to consumer credit card loans were estimated to decrease interest income by approximately $926 thousand on an annual, pre-tax basis, compared to amounts contractually owed. The allowance for loan losses related to troubled debt restructurings on non-accrual status is determined by individual evaluation, including collateral adequacy, using the same process as loans on non-accrual status which are not classified as troubled debt restructurings. Those performing loans classified as troubled debt restructurings are accruing loans which management expects to collect under contractual terms. Performing commercial loans have had no other concessions granted other than being renewed at an interest rate judged not to be market. As such, they have similar risk characteristics as non-troubled debt commercial loans and are collectively evaluated based on internal risk rating, loan type, delinquency, historical experience and current economic factors. Performing personal banking loans classified as troubled debt restructurings resulted from the borrower not reaffirming the debt during bankruptcy and have had no other concession granted, other than the Bank's future limitations on collecting payment deficiencies or in pursuing foreclosure actions. As such, they have similar risk characteristics as non-troubled debt personal banking loans and are evaluated collectively based on loan type, delinquency, historical experience and current economic factors. If a troubled debt restructuring defaults and is already on non-accrual status, the allowance for loan losses continues to be based on individual evaluation, using discounted expected cash flows or the fair value of collateral. If an accruing troubled debt restructuring defaults, the loan's risk rating is downgraded to non-accrual status and the loan's related allowance for loan losses is determined based on individual evaluation, or if necessary, the loan is charged off and collection efforts begun. The Company had commitments of $11.5 million at September 30, 2016 to lend additional funds to borrowers with restructured loans. Loans held for sale Beginning January 1, 2015, certain long-term fixed rate personal real estate loan originations have been designated as held for sale, and the Company has elected the fair value option for these loans. The election of the fair value option aligns the accounting for these loans with the related economic hedges discussed in Note 10. At September 30, 2016 , the fair value of these loans was $4.4 million , and the unpaid principal balance was $4.3 million . Beginning in the third quarter of 2015, the Company has designated certain student loan originations as held for sale. The borrowers are credit-worthy students who are attending colleges and universities. The loans are intended to be sold in the secondary market, and the Company maintains contracts with Sallie Mae to sell the loans at various times while the student is attending school or shortly after graduation. At September 30, 2016 , the balance of these loans was $5.1 million . These loans are carried at lower of cost or fair value. In March 2016, the Company designated certain loans secured by automobiles as held for sale in order to rebalance the auto loan portfolio in relation to the Company's other loan categories. The loans were sold in the second and third quarters and totaled $33.6 million , resulting in a net gain of $56 thousand . The group of loans were representative of the overall auto loan portfolio and were sold to other financial institutions. At September 30, 2016 , none of the loans held for sale were on non-accrual status or 90 days past due and still accruing. Interest income with respect to loans held for sale is accrued based on the principal amount outstanding and the loan's contractual interest rate. Gains and losses in fair value resulting from the application of the fair value option, or lower of cost or fair value accounting, are recognized in loan fees and sales in the consolidated statements of income. Foreclosed real estate/repossessed assets The Company’s holdings of foreclosed real estate totaled $950 thousand and $2.8 million at September 30, 2016 and December 31, 2015 , respectively. Personal property acquired in repossession, generally autos and marine and recreational vehicles, totaled $2.5 million and $3.3 million at September 30, 2016 and December 31, 2015 , respectively. Upon acquisition, these assets are recorded at fair value less estimated selling costs at the date of foreclosure, establishing a new cost basis. They are subsequently carried at the lower of this cost basis or fair value less estimated selling costs.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2016
Investment Securities [Abstract]
Investment Securities	Investment Securities Investment securities, at fair value, consisted of the following at September 30, 2016 and December 31, 2015 . (In thousands) Sept. 30, 2016 Dec. 31, 2015 Available for sale $ 9,438,871 $ 9,777,004 Trading 28,586 11,890 Non-marketable 108,224 112,786 Total investment securities $ 9,575,681 $ 9,901,680 Most of the Company’s investment securities are classified as available for sale, and this portfolio is discussed in more detail below. The available for sale and the trading portfolios are carried at fair value. Securities which are classified as non-marketable include Federal Home Loan Bank (FHLB) stock and Federal Reserve Bank stock held for debt and regulatory purposes, which totaled $46.9 million at September 30, 2016 and $46.8 million at December 31, 2015 . Investment in Federal Reserve Bank stock is based on the capital structure of the investing bank, and investment in FHLB stock is tied to the level of borrowings from the FHLB. These holdings are carried at cost. Non-marketable securities also include private equity investments, which amounted to $61.0 million at September 30, 2016 and $65.6 million at December 31, 2015 . In the absence of readily ascertainable market values, these securities are carried at estimated fair value. A summary of the available for sale investment securities by maturity groupings as of September 30, 2016 is shown below. The investment portfolio includes agency mortgage-backed securities, which are guaranteed by agencies such as the FHLMC, FNMA, GNMA and FDIC, in addition to non-agency mortgage-backed securities, which have no guarantee but are collateralized by residential mortgages. Also included are certain other asset-backed securities, which are primarily collateralized by credit cards, automobiles, student loans, and commercial loans. These securities differ from traditional debt securities primarily in that they may have uncertain maturity dates and are priced based on estimated prepayment rates on the underlying collateral. (In thousands) Amortized Cost Fair Value U.S. government and federal agency obligations: Within 1 year $ 59,068 $ 60,028 After 1 but within 5 years 500,823 514,620 After 5 but within 10 years 106,427 110,802 After 10 years 72,340 70,199 Total U.S. government and federal agency obligations 738,658 755,649 Government-sponsored enterprise obligations: Within 1 year 11,589 11,627 After 1 but within 5 years 419,071 424,410 After 5 but within 10 years 14,988 15,205 Total government-sponsored enterprise obligations 445,648 451,242 State and municipal obligations: Within 1 year 153,968 155,078 After 1 but within 5 years 626,147 641,498 After 5 but within 10 years 941,494 983,236 After 10 years 55,248 56,189 Total state and municipal obligations 1,776,857 1,836,001 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,590,902 2,663,677 Non-agency mortgage-backed securities 922,302 937,208 Asset-backed securities 2,403,019 2,409,324 Total mortgage and asset-backed securities 5,916,223 6,010,209 Other debt securities: Within 1 year 5,997 6,025 After 1 but within 5 years 97,136 98,939 After 5 but within 10 years 214,311 222,376 After 10 years 11,588 11,472 Total other debt securities 329,032 338,812 Equity securities 5,678 46,958 Total available for sale investment securities $ 9,212,096 $ 9,438,871 Investments in U.S. government and federal agency obligations include U.S. Treasury inflation-protected securities, which totaled $437.9 million , at fair value, at September 30, 2016 . Interest paid on these securities increases with inflation and decreases with deflation, as measured by the Consumer Price Index. Included in equity securities is common and preferred stock held by the holding company, Commerce Bancshares, Inc. (the Parent), with a fair value of $46.9 million at September 30, 2016 . For securities classified as available for sale, the following table shows the unrealized gains and losses (pre-tax) in accumulated other comprehensive income, by security type. (In thousands) Amortized Cost Gross Gross Fair Value September 30, 2016 U.S. government and federal agency obligations $ 738,658 $ 19,132 $ (2,141 ) $ 755,649 Government-sponsored enterprise obligations 445,648 5,637 (43 ) 451,242 State and municipal obligations 1,776,857 59,760 (616 ) 1,836,001 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,590,902 72,803 (28 ) 2,663,677 Non-agency mortgage-backed securities 922,302 15,145 (239 ) 937,208 Asset-backed securities 2,403,019 14,026 (7,721 ) 2,409,324 Total mortgage and asset-backed securities 5,916,223 101,974 (7,988 ) 6,010,209 Other debt securities 329,032 9,946 (166 ) 338,812 Equity securities 5,678 41,280 — 46,958 Total $ 9,212,096 $ 237,729 $ (10,954 ) $ 9,438,871 December 31, 2015 U.S. government and federal agency obligations $ 729,846 $ 5,051 $ (7,821 ) $ 727,076 Government-sponsored enterprise obligations 794,912 2,657 (4,546 ) 793,023 State and municipal obligations 1,706,635 37,061 (1,739 ) 1,741,957 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,579,031 47,856 (8,606 ) 2,618,281 Non-agency mortgage-backed securities 879,186 8,596 (7,819 ) 879,963 Asset-backed securities 2,660,201 1,287 (17,107 ) 2,644,381 Total mortgage and asset-backed securities 6,118,418 57,739 (33,532 ) 6,142,625 Other debt securities 335,925 377 (4,982 ) 331,320 Equity securities 5,678 35,325 — 41,003 Total $ 9,691,414 $ 138,210 $ (52,620 ) $ 9,777,004 The Company’s impairment policy requires a review of all securities for which fair value is less than amortized cost. Special emphasis and analysis is placed on securities whose credit rating has fallen below A3 (Moody's) or A- (Standard & Poor's), whose fair values have fallen more than 20% below purchase price for an extended period of time, or have been identified based on management’s judgment. These securities are placed on a watch list, and for all such securities, cash flow analyses are prepared. For more complex analyses, detailed cash flow models are prepared which use inputs specific to each security. Inputs to these models include factors such as cash flow received, contractual payments required, and various other information related to the underlying collateral (including current delinquencies), collateral loss severity rates (including loan to values), expected delinquency rates, credit support from other tranches, and prepayment speeds. Stress tests are performed at varying levels of delinquency rates, prepayment speeds and loss severities in order to gauge probable ranges of credit loss. At September 30, 2016 , the fair value of securities on this watch list was $103.7 million compared to $95.8 million at December 31, 2015 . As of September 30, 2016 , the Company had recorded other-than-temporary impairment (OTTI) on certain non-agency mortgage-backed securities, part of the watch list mentioned above, which had an aggregate fair value of $34.6 million . The cumulative credit-related portion of the impairment on these securities, which was recorded in earnings, totaled $14.2 million . The Company does not intend to sell these securities and believes it is not likely that it will be required to sell the securities before the recovery of their amortized cost. The credit-related portion of the loss on these securities was based on the cash flows projected to be received over the estimated life of the securities, discounted to present value, and compared to the current amortized cost bases of the securities. Significant inputs to the cash flow models used to calculate the credit losses on these securities at September 30, 2016 included the following: Significant Inputs Range Prepayment CPR 0% - 25% Projected cumulative default 18% - 51% Credit support 0% - 30% Loss severity 17% - 63% The following table presents a rollforward of the cumulative OTTI credit losses recognized in earnings on all available for sale debt securities. For the Nine Months Ended September 30 (In thousands) 2016 2015 Cumulative OTTI credit losses at January 1 $ 14,129 $ 13,734 Credit losses on debt securities for which impairment was not previously recognized — 76 Credit losses on debt securities for which impairment was previously recognized 270 407 Increase in expected cash flows that are recognized over remaining life of security (171 ) (73 ) Cumulative OTTI credit losses at September 30 $ 14,228 $ 14,144 Securities with unrealized losses recorded in accumulated other comprehensive income are shown in the table below, along with the length of the impairment period. Less than 12 months 12 months or longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2016 U.S. government and federal agency obligations $ 36,586 $ 61 $ 33,613 $ 2,080 $ 70,199 $ 2,141 Government-sponsored enterprise obligations 49,901 43 — — 49,901 43 State and municipal obligations 26,335 227 16,276 389 42,611 616 Mortgage and asset-backed securities: Agency mortgage-backed securities 24,564 23 2,304 5 26,868 28 Non-agency mortgage-backed securities 61,283 127 39,070 112 100,353 239 Asset-backed securities 279,282 1,510 365,402 6,211 644,684 7,721 Total mortgage and asset-backed securities 365,129 1,660 406,776 6,328 771,905 7,988 Other debt securities 7,936 36 12,458 130 20,394 166 Total $ 485,887 $ 2,027 $ 469,123 $ 8,927 $ 955,010 $ 10,954 December 31, 2015 U.S. government and federal agency obligations $ 491,998 $ 3,098 $ 31,012 $ 4,723 $ 523,010 $ 7,821 Government-sponsored enterprise obligations 157,830 1,975 110,250 2,571 268,080 4,546 State and municipal obligations 66,998 544 31,120 1,195 98,118 1,739 Mortgage and asset-backed securities: Agency mortgage-backed securities 530,035 2,989 291,902 5,617 821,937 8,606 Non-agency mortgage-backed securities 653,603 7,059 54,536 760 708,139 7,819 Asset-backed securities 2,207,922 12,492 223,311 4,615 2,431,233 17,107 Total mortgage and asset-backed securities 3,391,560 22,540 569,749 10,992 3,961,309 33,532 Other debt securities 244,452 3,687 25,218 1,295 269,670 4,982 Total $ 4,352,838 $ 31,844 $ 767,349 $ 20,776 $ 5,120,187 $ 52,620 The total available for sale portfolio consisted of approximately 2,000 individual securities at September 30, 2016 . The portfolio included 152 securities, having an aggregate fair value of $955.0 million , that were in an unrealized loss position at September 30, 2016 , compared to 466 securities, with a fair value of $5.1 billion , at December 31, 2015 . The total amount of unrealized losses on these securities decreased $41.7 million to $11.0 million at September 30, 2016 , largely due to a lower rate environment. At September 30, 2016 , the fair value of securities in an unrealized loss position for 12 months or longer totaled $469.1 million , or 5.0% of the total portfolio value. The Company’s holdings of state and municipal obligations included gross unrealized losses of $616 thousand at September 30, 2016 , of which $378 thousand related to auction rate securities. This portfolio totaled $1.8 billion at fair value, or 19.5% of total available for sale securities. The average credit quality of the portfolio, excluding auction rate securities, is Aa2 as rated by Moody’s. The portfolio is diversified in order to reduce risk, and the Company has processes and procedures in place to monitor its holdings, identify signs of financial distress and, if necessary, exit its positions in a timely manner. The following table presents proceeds from sales of securities and the components of investment securities gains and losses which have been recognized in earnings. For the Nine Months Ended September 30 (In thousands) 2016 2015 Proceeds from sales of available for sale securities $ — $ 675,870 Proceeds from sales of non-marketable securities 7,946 9,023 Total proceeds $ 7,946 $ 684,893 Available for sale: Gains realized on sales $ — $ 2,813 Other-than-temporary impairment recognized on debt securities (270 ) (483 ) Non-marketable: Gains realized on sales 3,717 2,516 Losses realized on sales (502 ) — Fair value adjustments, net (6,649 ) 2,954 Investment securities gains (losses), net $ (3,704 ) $ 7,800 At September 30, 2016 , securities totaling $4.0 billion in fair value were pledged to secure public fund deposits, securities sold under agreements to repurchase, trust funds, and borrowings at the Federal Reserve Bank and FHLB. Securities pledged under agreements pursuant to which the collateral may be sold or re-pledged by the secured parties approximated $578.1 million , while the remaining securities were pledged under agreements pursuant to which the secured parties may not sell or re-pledge the collateral. Except for obligations of various government-sponsored enterprises such as FNMA, FHLB and FHLMC, no investment in a single issuer exceeded 10% of stockholders’ equity.

Goodwill And Other Intangible A

Goodwill And Other Intangible Assets	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Other Intangible Assets	Goodwill and Other Intangible Assets The following table presents information about the Company's intangible assets which have estimable useful lives. September 30, 2016 December 31, 2015 (In thousands) Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Amortizable intangible assets: Core deposit premium $ 31,270 $ (27,182 ) $ — $ 4,088 $ 31,270 $ (26,239 ) $ — $ 5,031 Mortgage servicing rights 5,260 (2,691 ) (36 ) 2,533 4,638 (2,971 ) (29 ) 1,638 Total $ 36,530 $ (29,873 ) $ (36 ) $ 6,621 $ 35,908 $ (29,210 ) $ (29 ) $ 6,669 Aggregate amortization expense on intangible assets was $374 thousand and $445 thousand for the three month periods ended September 30, 2016 and 2015 , respectively, and $1.2 million and $1.4 million for the nine month periods ended September 30, 2016 and 2015 , respectively. The following table shows the estimated annual amortization expense for the next five fiscal years. This expense is based on existing asset balances and the interest rate environment as of September 30, 2016 . The Company’s actual amortization expense in any given period may be different from the estimated amounts depending upon the acquisition of intangible assets, changes in mortgage interest rates, prepayment rates and other market conditions. (In thousands) 2016 $ 1,584 2017 1,210 2018 931 2019 770 2020 630 Changes in the carrying amount of goodwill and net other intangible assets for the nine month period ended September 30, 2016 is as follows: (In thousands) Goodwill Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2016 $ 138,921 $ 5,031 $ 1,638 Originations — — 1,127 Amortization — (943 ) (225 ) Impairment — — (7 ) Balance September 30, 2016 $ 138,921 $ 4,088 $ 2,533 Goodwill allocated to the Company’s operating segments at September 30, 2016 and December 31, 2015 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Guarantees

Guarantees	9 Months Ended
	Sep. 30, 2016
Guarantees [Abstract]
Guarantees	Guarantees The Company, as a provider of financial services, routinely issues financial guarantees in the form of financial and performance standby letters of credit. Standby letters of credit are contingent commitments issued by the Company generally to guarantee the payment or performance obligation of a customer to a third party. While these represent a potential outlay by the Company, a significant amount of the commitments may expire without being drawn upon. The Company has recourse against the customer for any amount it is required to pay to a third party under a standby letter of credit. The letters of credit are subject to the same credit policies, underwriting standards and approval process as loans made by the Company. Most of the standby letters of credit are secured, and in the event of nonperformance by customers, the Company has rights to the underlying collateral, which could include commercial real estate, physical plant and property, inventory, receivables, cash and marketable securities. Upon issuance of standby letters of credit, the Company recognizes a liability for the fair value of the obligation undertaken, which is estimated to be equivalent to the amount of fees received from the customer over the life of the agreement. At September 30, 2016 , that net liability was $2.4 million , which will be accreted into income over the remaining life of the respective commitments. The contractual amount of these letters of credit, which represents the maximum potential future payments guaranteed by the Company, was $352.1 million at September 30, 2016 . The Company periodically enters into credit risk participation agreements (RPAs) as a guarantor to other financial institutions, in order to mitigate those institutions’ credit risk associated with interest rate swaps with third parties. The RPA stipulates that, in the event of default by the third party on the interest rate swap, the Company will reimburse a portion of the loss borne by the financial institution. These interest rate swaps are normally collateralized (generally with real property, inventories and equipment) by the third party, which limits the credit risk associated with the Company’s RPAs. The third parties usually have other borrowing relationships with the Company. The Company monitors overall borrower collateral and at September 30, 2016 , believes sufficient collateral is available to cover potential swap losses. The RPAs are carried at fair value throughout their term with all changes in fair value, including those due to a change in the third party’s creditworthiness, recorded in current earnings. The terms of the RPAs, which correspond to the terms of the underlying swaps, range from 3 to 11 years. At September 30, 2016 , the fair value of the Company's guarantee liabilities for RPAs was $272 thousand , and the notional amount of the underlying swaps was $60.2 million . The maximum potential future payment guaranteed by the Company cannot be readily estimated but is dependent upon the fair value of the interest rate swaps at the time of default.

Pension

Pension	9 Months Ended
	Sep. 30, 2016
Pension [Abstract]
Pension	Pension The amount of net pension cost is shown in the table below: For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2016 2015 2016 2015 Service cost - benefits earned during the period $ 135 $ 127 $ 406 $ 379 Interest cost on projected benefit obligation 986 1,139 2,958 3,571 Expected return on plan assets (1,437 ) (1,523 ) (4,313 ) (4,569 ) Amortization of prior service cost (68 ) (203 ) (203 ) (203 ) Amortization of unrecognized net loss 647 660 1,940 1,969 Net periodic pension cost $ 263 $ 200 $ 788 $ 1,147 Substantially all benefits accrued under the Company’s defined benefit pension plan were frozen effective January 1, 2005, and the remaining benefits were frozen effective January 1, 2011. During the first nine months of 2016 , the Company made no funding contributions to its defined benefit pension plan and made minimal funding contributions to a supplemental executive retirement plan (the CERP), which carries no segregated assets. The Company has no plans to make any further contributions, other than those related to the CERP, during the remainder of 2016 . Effective January 1, 2016, the Company changed the method used to estimate the interest cost component of net periodic pension cost for its defined benefit pension plan. Prior to the change, the interest cost component was estimated by utilizing a single weighted average discount rate derived from the yield curve used to measure the projected benefit obligation. Under the new method, the interest cost component is estimated by applying the specific annual spot rates along the yield curve used in the determination of the projected benefit obligation to the relevant projected cash flows. This change provides a more precise measurement of the interest cost by improving the correlation between projected benefit cash flows and the corresponding spot yield curve rates. The Company accounted for this change prospectively as a change in accounting estimate. The change resulted in a decrease of approximately $851 thousand in the estimated annual net periodic pension cost for 2016.

Common Stock

Common Stock	9 Months Ended
	Sep. 30, 2016
Common Stock [Abstract]
Common Stock	Common and Preferred Stock * Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that contain nonforfeitable rights to dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 12. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands, except per share data) 2016 2015 2016 2015 Basic income per common share: Net income available to common shareholders $ 66,295 $ 62,362 $ 197,062 $ 193,270 Less income allocated to nonvested restricted stock 913 884 2,747 2,677 Net income allocated to common stock $ 65,382 $ 61,478 $ 194,315 $ 190,593 Weighted average common shares outstanding 95,426 96,589 95,458 98,568 Basic income per common share $ .69 $ .63 $ 2.04 $ 1.93 Diluted income per common share: Net income available to common shareholders $ 66,295 $ 62,362 $ 197,062 $ 193,270 Less income allocated to nonvested restricted stock 912 883 2,743 2,672 Net income allocated to common stock $ 65,383 $ 61,479 $ 194,319 $ 190,598 Weighted average common shares outstanding 95,426 96,589 95,458 98,568 Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods 243 293 236 315 Weighted average diluted common shares outstanding 95,669 96,882 95,694 98,883 Diluted income per common share $ .68 $ .63 $ 2.03 $ 1.93 Unexercised stock options and stock appreciation rights of 84 thousand and 395 thousand were excluded in the computation of diluted income per common share for the nine month periods ended September 30, 2016 and 2015 , respectively, because their inclusion would have been anti-dilutive. The Company also has 6,000,000 depositary shares outstanding, representing 6,000 shares of 6.00% Series B Non-Cumulative Perpetual Preferred Stock, par value $1.00 per share, having an aggregate liquidation preference of $150.0 million (“Series B Preferred Stock”). Each depositary share has a liquidation preference of $25.00 per share. Dividends on the Series B Preferred Stock, if declared, accrue and are payable quarterly, in arrears, at a rate of 6.00%. The Series B Preferred Stock qualifies as Tier 1 capital for the purposes of the regulatory capital calculations. In the event that the Company does not declare and pay dividends on the Series B Preferred Stock for the most recent dividend period, the ability of the Company to declare or pay dividends on, purchase, redeem or otherwise acquire shares of its common stock or any securities of the Company that rank junior to the Series B Preferred Stock is subject to certain restrictions under the terms of the Series B Preferred Stock. * All prior year share and per share amounts in this note have been restated for the 5% common stock dividend distributed in December 2015.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The table below shows the activity and accumulated balances for components of other comprehensive income. The largest component is the unrealized holding gains and losses on available for sale securities. Unrealized gains and losses on debt securities for which an other-than-temporary impairment (OTTI) has been recorded in current earnings are shown separately below. The other component is the amortization from other comprehensive income of losses associated with pension benefits, which occurs as the losses are included in current net periodic pension cost. Unrealized Gains (Losses) on Securities (1) Pension Loss (2) Total Accumulated Other Comprehensive Income (In thousands) OTTI Other Balance January 1, 2016 $ 3,316 $ 49,750 $ (20,596 ) $ 32,470 Other comprehensive income (loss) before reclassifications (837 ) 141,752 — 140,915 Amounts reclassified from accumulated other comprehensive income 270 — 1,737 2,007 Current period other comprehensive income (loss), before tax (567 ) 141,752 1,737 142,922 Income tax (expense) benefit 215 (53,865 ) (660 ) (54,310 ) Current period other comprehensive income (loss), net of tax (352 ) 87,887 1,077 88,612 Balance September 30, 2016 $ 2,964 $ 137,637 $ (19,519 ) $ 121,082 Balance January 1, 2015 $ 3,791 $ 81,310 $ (23,008 ) $ 62,093 Other comprehensive income (loss) before reclassifications (976 ) 7,255 — 6,279 Amounts reclassified from accumulated other comprehensive income 483 (2,813 ) 1,766 (564 ) Current period other comprehensive income (loss), before tax (493 ) 4,442 1,766 5,715 Income tax (expense) benefit 187 (1,688 ) (671 ) (2,172 ) Current period other comprehensive income (loss), net of tax (306 ) 2,754 1,095 3,543 Transfer of unrealized gain on securities for which impairment was not previously recognized 43 (43 ) — — Balance September 30, 2015 $ 3,528 $ 84,021 $ (21,913 ) $ 65,636 (1) The pre-tax amounts reclassified from accumulated other comprehensive income are included in "investment securities gains (losses), net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income are included in the computation of net periodic pension cost as "amortization of prior service cost" and "amortization of unrecognized net loss" (see Note 6), for inclusion in the consolidated statements of income.

Segments

Segments	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segments	Segments The Company segregates financial information for use in assessing its performance and allocating resources among three operating segments: Consumer, Commercial and Wealth. The Consumer segment includes the consumer portion of the retail branch network (loans, deposits, and other personal banking services), indirect and other consumer financing, and consumer debit and credit bank cards. The Commercial segment provides corporate lending (including the Small Business Banking product line within the branch network), leasing, international services, and business, government deposit, and related commercial cash management services, as well as merchant and commercial bank card products. The Commercial segment includes the Capital Markets Group, which sells fixed income securities and provides investment safekeeping and bond accounting services. The Wealth segment provides traditional trust and estate tax planning, advisory and discretionary investment management, and brokerage services, and includes the Private Banking product portfolio. The following table presents selected financial information by segment and reconciliations of combined segment totals to consolidated totals. There were no material intersegment revenues among the three segments. Management periodically makes changes to methods of assigning costs and income to its business segments to better reflect operating results. If appropriate, these change are reflected in prior year information presented below. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended September 30, 2016 Net interest income $ 67,375 $ 78,537 $ 10,782 $ 156,694 $ 14,549 $ 171,243 Provision for loan losses (9,033 ) 2,432 (5 ) (6,606 ) (657 ) (7,263 ) Non-interest income 34,229 49,832 36,675 120,736 (1,417 ) 119,319 Investment securities losses, net — — — — (1,965 ) (1,965 ) Non-interest expense (70,113 ) (71,425 ) (28,185 ) (169,723 ) (11,519 ) (181,242 ) Income before income taxes $ 22,458 $ 59,376 $ 19,267 $ 101,101 $ (1,009 ) $ 100,092 Nine Months Ended September 30, 2016 Net interest income $ 201,166 $ 231,552 $ 32,604 $ 465,322 $ 41,525 $ 506,847 Provision for loan losses (26,533 ) 3,919 (120 ) (22,734 ) (3,184 ) (25,918 ) Non-interest income 97,165 149,240 107,696 354,101 812 354,913 Investment securities losses, net — — — — (3,704 ) (3,704 ) Non-interest expense (209,649 ) (211,961 ) (85,025 ) (506,635 ) (29,169 ) (535,804 ) Income before income taxes $ 62,149 $ 172,750 $ 55,155 $ 290,054 $ 6,280 $ 296,334 Three Months Ended September 30, 2015 Net interest income $ 67,085 $ 74,476 $ 10,427 $ 151,988 $ 10,050 $ 162,038 Provision for loan losses (8,605 ) 166 106 (8,333 ) (31 ) (8,364 ) Non-interest income 31,099 47,486 33,980 112,565 (1,277 ) 111,288 Investment securities losses, net — — — — (378 ) (378 ) Non-interest expense (69,158 ) (68,713 ) (27,182 ) (165,053 ) (6,349 ) (171,402 ) Income before income taxes $ 20,421 $ 53,415 $ 17,331 $ 91,167 $ 2,015 $ 93,182 Nine Months Ended September 30, 2015 Net interest income $ 199,265 $ 218,699 $ 31,921 $ 449,885 $ 21,948 $ 471,833 Provision for loan losses (25,500 ) 842 114 (24,544 ) 5,003 (19,541 ) Non-interest income 87,462 144,685 102,517 334,664 (2,567 ) 332,097 Investment securities gains, net — — — — 7,800 7,800 Non-interest expense (203,440 ) (199,097 ) (81,432 ) (483,969 ) (16,741 ) (500,710 ) Income before income taxes $ 57,787 $ 165,129 $ 53,120 $ 276,036 $ 15,443 $ 291,479 The information presented above was derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. This information is based on internal management accounting procedures and methods, which have been developed to reflect the underlying economics of the businesses. The methodologies are applied in connection with funds transfer pricing and assignment of overhead costs among segments. Funds transfer pricing was used in the determination of net interest income by assigning a standard cost (credit) for funds used (provided) by assets and liabilities based on their maturity, prepayment and/or repricing characteristics. The segment activity, as shown above, includes both direct and allocated items. Amounts in the “Other/Elimination” column include activity not related to the segments, such as that relating to administrative functions, the investment securities portfolio, and the effect of certain expense allocations to the segments. The provision for loan losses in this category contains the difference between net loan charge-offs assigned directly to the segments and the recorded provision for loan loss expense. Included in this category’s net interest income are earnings of the investment portfolio, which are not allocated to a segment. The performance measurement of the operating segments is based on the management structure of the Company and is not necessarily comparable with similar information for any other financial institution. The information is also not necessarily indicative of the segments' financial condition and results of operations if they were independent entities.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2016
Derivative Instrument Detail [Abstract]
Derivative Instruments	Derivative Instruments The notional amounts of the Company’s derivative instruments are shown in the table below. These contractual amounts, along with other terms of the derivative, are used to determine amounts to be exchanged between counterparties and are not a measure of loss exposure. The Company’s derivative instruments are accounted for as free-standing derivatives, and changes in their fair value are recorded in current earnings. (In thousands) September 30, 2016 December 31, 2015 Interest rate swaps $ 1,320,674 $ 1,020,310 Interest rate caps 60,954 66,118 Credit risk participation agreements 63,117 62,456 Foreign exchange contracts 3,792 15,535 Mortgage loan commitments 24,301 8,605 Mortgage loan forward sale contracts 518 642 Forward TBA contracts 25,500 11,000 Total notional amount $ 1,498,856 $ 1,184,666 The largest group of notional amounts relate to interest rate swap contracts sold to commercial customers who wish to modify their interest rate sensitivity. These swaps are offset by matching contracts purchased by the Company from other financial dealer institutions. Contracts with dealers that require central clearing are novated to a clearing agency who becomes the Company's counterparty. Because of the matching terms of the offsetting contracts, in addition to collateral provisions which mitigate the impact of non-performance risk, changes in fair value subsequent to initial recognition have a minimal effect on earnings. Many of the Company’s interest rate swap contracts with large financial institutions contain contingent features relating to debt ratings or capitalization levels. Under these provisions, if the Company’s debt rating falls below investment grade or if the Company ceases to be “well-capitalized” under risk-based capital guidelines, certain counterparties can require immediate and ongoing collateralization on interest rate swaps in net liability positions or instant settlement of the contracts. The Company maintains debt ratings and capital well above these minimum requirements. The banking customer counterparties are engaged in a variety of businesses, including real estate and building materials, manufacturing, education, communications, retail product distribution, and retirement communities. At September 30, 2016 , the largest potential loss exposures were in the groups related to real estate, distribution, and retirement communities. If the counterparties in these groups failed to perform, and if the underlying collateral proved to be of no value, the Company estimates that it would incur losses of $15.7 million (real estate), $3.5 million (retirement communities), and $3.4 million (distribution) at September 30, 2016 . The Company also contracts with other financial institutions, as a guarantor or beneficiary, to share credit risk associated with certain interest rate swaps through risk participation agreements. The Company’s risks and responsibilities as guarantor are further discussed in Note 5 on Guarantees. In addition, the Company enters into foreign exchange contracts, which are mainly comprised of contracts to purchase or deliver foreign currencies for customers at specific future dates. In 2015, the Company initiated a program of secondary market sales of residential mortgage loans and has designated certain newly-originated residential mortgage loans as held for sale. Derivative instruments arising from this activity include mortgage loan commitments and forward loan sale commitments. Changes in the fair values of the loan commitments and funded loans prior to sale that are due to changes in interest rates are economically hedged with forward contracts to sell residential mortgage-backed securities in the to-be-announced (TBA) market. These forward TBA contracts are also considered to be derivatives and are settled in cash at the security settlement date. The fair values of the Company's derivative instruments, whose notional amounts are listed above, are shown in the table below. Derivative instruments with a positive fair value (asset derivatives) are reported in other assets in the consolidated balance sheets, while derivative instruments with a negative fair value (liability derivatives) are reported in other liabilities in the consolidated balance sheets. Information about the valuation methods used to determine fair value is provided in Note 13 on Fair Value Measurements. Asset Derivatives Liability Derivatives Sept. 30, 2016 Dec. 31, 2015 Sept. 30, 2016 Dec. 31, 2015 (In thousands ) Fair Value Fair Value Derivative instruments: Interest rate swaps $ 31,135 $ 11,993 $ (31,343 ) $ (11,993 ) Interest rate caps 36 73 (36 ) (73 ) Credit risk participation agreements 1 1 (272 ) (195 ) Foreign exchange contracts 5 437 (10 ) (430 ) Mortgage loan commitments 876 263 — — Mortgage loan forward sale contracts 1 — — — Forward TBA contracts 2 4 (111 ) (38 ) Total $ 32,056 $ 12,771 $ (31,772 ) $ (12,729 ) The effects of derivative instruments on the consolidated statements of income are shown in the table below. Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2016 2015 2016 2015 Derivative instruments: Interest rate swaps Other non-interest income $ 203 $ 741 $ 3,198 $ 3,551 Credit risk participation agreements Other non-interest income 50 (57 ) (8 ) (9 ) Foreign exchange contracts Other non-interest income (20 ) (55 ) (12 ) 267 Mortgage loan commitments Loan fees and sales 86 106 613 451 Mortgage loan forward sale contracts Loan fees and sales 1 (6 ) 1 (5 ) Forward TBA contracts Loan fees and sales (172 ) (370 ) (898 ) 15 Total $ 148 $ 359 $ 2,894 $ 4,270 The following table shows the extent to which assets and liabilities relating to derivative instruments have been offset in the consolidated balance sheets. It also provides information about these instruments which are subject to an enforceable master netting arrangement, irrespective of whether they are offset, and the extent to which the instruments could potentially be offset. Also shown is collateral received or pledged in the form of other financial instruments, which is generally cash or marketable securities. The collateral amounts in this table are limited to the outstanding balances of the related asset or liability (after netting is applied); thus amounts of excess collateral are not shown. Most of the derivatives in the following table were transacted under master netting arrangements that contain a conditional right of offset, such as close-out netting, upon default. The Company is party to master netting arrangements with most of its swap derivative counterparties; however, the Company does not offset derivative assets and liabilities under these arrangements on its consolidated balance sheet. Collateral, usually in the form of marketable securities, is exchanged between the Company and dealer bank counterparties and is generally subject to thresholds and transfer minimums. By contract, it may be sold or re-pledged by the secured party until recalled at a subsequent valuation date by the pledging party. For those swap transactions requiring central clearing, the Company posts cash and securities to its clearing agency. At September 30, 2016 , the Company had a net liability position with dealer bank and clearing agency counterparties totaling $31.3 million , and had posted securities with a fair value of $5.1 million and cash totaling $36.8 million . Collateral positions are valued daily, and adjustments to amounts received and pledged by the Company are made as appropriate to maintain proper collateralization for these transactions. Swap derivative transactions with customers are generally secured by rights to non-financial collateral, such as real and personal property, which is not shown in the table below. Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Collateral Received/Pledged Net Amount September 30, 2016 Assets: Derivatives subject to master netting agreements $ 31,174 $ — $ 31,174 $ (38 ) $ — $ 31,136 Derivatives not subject to master netting agreements 882 — 882 Total derivatives 32,056 — 32,056 Liabilities: Derivatives subject to master netting agreements $ 31,762 $ — $ 31,762 $ (38 ) $ (30,319 ) $ 1,405 Derivatives not subject to master netting agreements 10 — 10 Total derivatives 31,772 — 31,772 December 31, 2015 Assets: Derivatives subject to master netting agreements $ 12,071 $ — $ 12,071 $ (94 ) $ — $ 11,977 Derivatives not subject to master netting agreements 700 — 700 Total derivatives 12,771 — 12,771 Liabilities: Derivatives subject to master netting agreements $ 12,299 $ — $ 12,299 $ (94 ) $ (10,927 ) $ 1,278 Derivatives not subject to master netting agreements 430 — 430 Total derivatives 12,729 — 12,729

Resale and Repurchase Agreement

Resale and Repurchase Agreements (Notes)	9 Months Ended
	Sep. 30, 2016
Resale and Repurchase Agreements [Abstract]
Resale and Repurchase Agreements [Text Block]	Resale and Repurchase Agreements The following table shows the extent to which assets and liabilities relating to securities purchased under agreements to resell (resale agreements) and securities sold under agreements to repurchase (repurchase agreements) have been offset in the consolidated balance sheets, in addition to the extent to which they could potentially be offset. Also shown is collateral received or pledged, which consists of marketable securities. The collateral amounts in the table are limited to the outstanding balances of the related asset or liability (after netting is applied); thus amounts of excess collateral are not shown. The agreements in the following table were transacted under master netting arrangements that contain a conditional right of offset, such as close-out netting, upon default. Resale and repurchase agreements are agreements to purchase/sell securities subject to an obligation to resell/repurchase the same or similar securities. They are accounted for as collateralized financing transactions, not as sales and purchases of the securities portfolio. The securities collateral accepted or pledged in resale and repurchase agreements with other financial institutions also may be sold or re-pledged by the secured party, but is usually delivered to and held by third party trustees. The Company generally retains custody of securities pledged for repurchase agreements with customers. The Company is party to several agreements commonly known as collateral swaps. These agreements involve the exchange of collateral under simultaneous repurchase and resale agreements with the same financial institution counterparty. These repurchase and resale agreements have the same principal amounts, inception dates, and maturity dates and have been offset against each other in the consolidated balance sheets, as permitted under the netting provisions of ASC 210-20-45. The collateral swaps totaled $550.0 million at both September 30, 2016 and December 31, 2015 . At September 30, 2016 , the Company had posted collateral of $572.9 million in marketable securities, consisting of agency mortgage-backed bonds and treasuries, and had accepted $564.7 million in investment grade asset-backed, commercial mortgage-backed, and corporate bonds. Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Securities Collateral Received/Pledged Net Amount September 30, 2016 Total resale agreements, subject to master netting arrangements $ 1,275,000 $ (550,000 ) $ 725,000 $ — $ (725,000 ) $ — Total repurchase agreements, subject to master netting arrangements 1,746,251 (550,000 ) 1,196,251 — (1,196,251 ) — December 31, 2015 Total resale agreements, subject to master netting arrangements $ 1,425,000 $ (550,000 ) $ 875,000 $ — $ (875,000 ) $ — Total repurchase agreements, subject to master netting arrangements 1,956,582 (550,000 ) 1,406,582 — (1,406,582 ) — The table below shows the remaining contractual maturities of repurchase agreements outstanding at September 30, 2016 and December 31, 2015 , in addition to the various types of marketable securities that have been pledged as collateral for these borrowings. Remaining Contractual Maturity of the Agreements (In thousands) Overnight and continuous Up to 90 days Greater than 90 days Total September 30, 2016 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 228,435 $ — $ 300,000 $ 528,435 Government-sponsored enterprise obligations 185,224 — 2,728 187,952 Agency mortgage-backed securities 367,145 2,908 252,982 623,035 Asset-backed securities 306,829 100,000 — 406,829 Total repurchase agreements, gross amount recognized $ 1,087,633 $ 102,908 $ 555,710 $ 1,746,251 December 31, 2015 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 210,346 $ — $ 300,000 $ 510,346 Government-sponsored enterprise obligations 356,970 — 24,096 381,066 Agency mortgage-backed securities 579,974 2,292 225,904 808,170 Asset-backed securities 212,000 45,000 — 257,000 Total repurchase agreements, gross amount recognized $ 1,359,290 $ 47,292 $ 550,000 $ 1,956,582

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2016
Share-based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company issues stock-based compensation in the form of nonvested restricted stock and stock appreciation rights (SARs). Most of the awards are issued during the first quarter of each year. The stock-based compensation expense that has been charged against income was $2.6 million and $2.4 million in the three month periods ended September 30, 2016 and 2015 , respectively, and $8.9 million and $7.7 million in the nine months ended September 30, 2016 and 2015 , respectively. Nonvested stock awards generally vest in 4 to 7 years and contain restrictions as to transferability, sale, pledging, or assigning, among others, prior to the end of the vesting period. Dividend and voting rights are conferred upon grant. A summary of the status of the Company’s nonvested share awards as of September 30, 2016 , and changes during the nine month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2016 1,384,417 $34.38 Granted 221,222 42.17 Vested (249,953 ) 30.51 Forfeited (28,618 ) 36.52 Nonvested at September 30, 2016 1,327,068 $36.36 SARs are granted with exercise prices equal to the market price of the Company’s stock at the date of grant. SARs vest ratably over 4 years of continuous service and have 10 -year contractual terms. All SARs must be settled in stock under provisions of the plan. In determining compensation cost, the Black-Scholes option-pricing model is used to estimate the fair value of SARs on date of grant. The current year per share average fair value and the model assumptions are shown in the table below. Weighted per share average fair value at grant date $7.49 Assumptions: Dividend yield 2.2 % Volatility 21.2 % Risk-free interest rate 1.8 % Expected term 7.2 years A summary of SAR activity during the first nine months of 2016 is presented below. (Dollars in thousands, except per share data) Rights Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2016 1,588,457 $33.74 Granted 251,982 41.35 Forfeited (13,916 ) 38.06 Expired (1,375 ) 37.19 Exercised (469,903 ) 31.37 Outstanding at September 30, 2016 1,355,245 $35.93 5.6 years $ 18,068

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Measurements [Abstract]
Fair Value Measurements	Fair Value Measurements The Company uses fair value measurements to record fair value adjustments to certain financial and nonfinancial assets and liabilities and to determine fair value disclosures. Various financial instruments such as available for sale and trading securities, certain non-marketable securities relating to private equity activities, and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets and liabilities on a nonrecurring basis, such as mortgage servicing rights and certain other investment securities. These nonrecurring fair value adjustments typically involve lower of cost or fair value accounting or write-downs of individual assets. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, the Company uses various valuation techniques and assumptions when estimating fair value. For accounting disclosure purposes, a three-level valuation hierarchy of fair value measurements has been established. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows: • Level 1 – inputs to the valuation methodology are quoted prices for identical assets or liabilities in active markets. • Level 2 – inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, and inputs that are observable for the assets or liabilities, either directly or indirectly (such as interest rates, yield curves, and prepayment speeds). • Level 3 – inputs to the valuation methodology are unobservable and significant to the fair value. These may be internally developed, using the Company’s best information and assumptions that a market participant would consider. The valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis are described in the Fair Value Measurements note in the Company's 2015 Annual Report on Form 10-K. There have been no significant changes in these methodologies since then. Instruments Measured at Fair Value on a Recurring Basis The table below presents the September 30, 2016 and December 31, 2015 carrying values of assets and liabilities measured at fair value on a recurring basis. There were no transfers among levels during the first nine months of 2016 or the year ended December 31, 2015 . Fair Value Measurements Using (In thousands) Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2016 Assets: Residential mortgage loans held for sale $ 4,447 $ — $ 4,447 $ — Available for sale securities: U.S. government and federal agency obligations 755,649 755,649 — — Government-sponsored enterprise obligations 451,242 — 451,242 — State and municipal obligations 1,836,001 — 1,819,093 16,908 Agency mortgage-backed securities 2,663,677 — 2,663,677 — Non-agency mortgage-backed securities 937,208 — 937,208 — Asset-backed securities 2,409,324 — 2,409,324 — Other debt securities 338,812 — 338,812 — Equity securities 46,958 23,045 23,913 — Trading securities 28,586 — 28,586 — Private equity investments 59,486 — — 59,486 Derivatives * 32,056 — 31,179 877 Assets held in trust for deferred compensation plan 10,028 10,028 — — Total assets 9,573,474 788,722 8,707,481 77,271 Liabilities: Derivatives * 31,772 — 31,500 272 Liabilities held in trust for deferred compensation plan 10,028 10,028 — — Total liabilities $ 41,800 $ 10,028 $ 31,500 $ 272 December 31, 2015 Assets: Residential mortgage loans held for sale $ 4,981 $ — $ 4,981 $ — Available for sale securities: U.S. government and federal agency obligations 727,076 727,076 — — Government-sponsored enterprise obligations 793,023 — 793,023 — State and municipal obligations 1,741,957 — 1,724,762 17,195 Agency mortgage-backed securities 2,618,281 — 2,618,281 — Non-agency mortgage-backed securities 879,963 — 879,963 — Asset-backed securities 2,644,381 — 2,644,381 — Other debt securities 331,320 — 331,320 — Equity securities 41,003 20,263 20,740 — Trading securities 11,890 — 11,890 — Private equity investments 63,032 — — 63,032 Derivatives * 12,771 — 12,507 264 Assets held in trust for deferred compensation plan 9,278 9,278 — — Total assets 9,878,956 756,617 9,041,848 80,491 Liabilities: Derivatives * 12,729 — 12,534 195 Liabilities held in trust for deferred compensation plan 9,278 9,278 — — Total liabilities $ 22,007 $ 9,278 $ 12,534 $ 195 * The fair value of each class of derivative is shown in Note 10. The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are summarized as follows: Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (In thousands) State and Municipal Obligations Private Equity Investments Derivatives Total For the three months ended September 30, 2016 Balance June 30, 2016 $ 17,679 $ 62,813 $ 502 $ 80,994 Total gains or losses (realized/unrealized): Included in earnings — (2,921 ) 136 (2,785 ) Included in other comprehensive income * 317 — — 317 Investment securities called (1,100 ) — — (1,100 ) Discount accretion 12 — — 12 Purchases of private equity investments — 2,894 — 2,894 Sale/pay down of private equity investments — (3,315 ) — (3,315 ) Capitalized interest/dividends — 15 — 15 Sale of risk participation agreement — — (33 ) (33 ) Balance September 30, 2016 $ 16,908 $ 59,486 $ 605 $ 76,999 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2016 $ — $ (2,921 ) $ 926 $ (1,995 ) For the nine months ended September 30, 2016 Balance January 1, 2016 $ 17,195 $ 63,032 $ 69 $ 80,296 Total gains or losses (realized/unrealized): Included in earnings — (6,645 ) 605 (6,040 ) Included in other comprehensive income * 819 — — 819 Investment securities called (1,200 ) — — (1,200 ) Discount accretion 94 — — 94 Purchases of private equity investments — 8,735 — 8,735 Sale/pay down of private equity investments — (5,713 ) — (5,713 ) Capitalized interest/dividends — 77 — 77 Sale of risk participation agreement — — (69 ) (69 ) Balance September 30, 2016 $ 16,908 $ 59,486 $ 605 $ 76,999 Total gains or losses for the nine months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2016 $ — $ (6,545 ) $ 868 $ (5,677 ) For the three months ended September 30, 2015 Balance June 30, 2015 $ 92,940 $ 58,726 $ 170 $ 151,836 Total gains or losses (realized/unrealized): Included in earnings — (1,221 ) 49 (1,172 ) Included in other comprehensive income * 227 — — 227 Discount accretion 22 — — 22 Purchases of private equity investments — 9,370 — 9,370 Balance September 30, 2015 $ 93,189 $ 66,875 $ 219 $ 160,283 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2015 $ — $ (1,221 ) $ 394 $ (827 ) For the nine months ended September 30, 2015 Balance January 1, 2015 $ 95,143 $ 57,581 $ (223 ) $ 152,501 Total gains or losses (realized/unrealized): Included in earnings — 2,954 442 3,396 Included in other comprehensive income * (127 ) — — (127 ) Investment securities called (2,000 ) — — (2,000 ) Discount accretion 173 — — 173 Purchases of private equity investments — 11,023 — 11,023 Sale/pay down of private equity investments — (4,800 ) — (4,800 ) Capitalized interest/dividends — 117 — 117 Balance September 30, 2015 $ 93,189 $ 66,875 $ 219 $ 160,283 Total gains or losses for the nine months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2015 $ — $ 2,954 $ 442 $ 3,396 * Included in "net unrealized gains (losses) on other securities" in the consolidated statements of comprehensive income. Gains and losses included in earnings for the Level 3 assets and liabilities in the previous table are reported in the following line items in the consolidated statements of income: (In thousands) Loan Fees and Sales Other Non-Interest Income Investment Securities Gains (Losses), Net Total For the three months ended September 30, 2016 Total gains or losses included in earnings $ 86 $ 50 $ (2,921 ) $ (2,785 ) Change in unrealized gains or losses relating to assets still held at September 30, 2016 $ 876 $ 50 $ (2,921 ) $ (1,995 ) For the nine months ended September 30, 2016 Total gains or losses included in earnings $ 613 $ (8 ) $ (6,645 ) $ (6,040 ) Change in unrealized gains or losses relating to assets still held at September 30, 2016 $ 876 $ (8 ) $ (6,545 ) $ (5,677 ) For the three months ended September 30, 2015 Total gains or losses included in earnings $ 106 $ (57 ) $ (1,221 ) $ (1,172 ) Change in unrealized gains or losses relating to assets still held at September 30, 2015 $ 451 $ (57 ) $ (1,221 ) $ (827 ) For the nine months ended September 30, 2015 Total gains or losses included in earnings $ 451 $ (9 ) $ 2,954 $ 3,396 Change in unrealized gains or losses relating to assets still held at September 30, 2015 $ 451 $ (9 ) $ 2,954 $ 3,396 Level 3 Inputs The Company's significant Level 3 measurements which employ unobservable inputs that are readily quantifiable pertain to auction rate securities (ARS) held by the Bank, investments in portfolio concerns held by the Company's private equity subsidiaries, and held for sale residential mortgage loan commitments. ARS are included in state and municipal securities and totaled $16.9 million at September 30, 2016 , while private equity investments, included in non-marketable securities, totaled $59.5 million . Information about these inputs is presented in the table and discussions below. Quantitative Information about Level 3 Fair Value Measurements Weighted Valuation Technique Unobservable Input Range Average Auction rate securities Discounted cash flow Estimated market recovery period 5 years Estimated market rate 2.4% - 3.3% Private equity investments Market comparable companies EBITDA multiple 4.0 - 5.5 Mortgage loan commitments Discounted cash flow Probability of funding 55.3% - 97.7% 76.8% Embedded servicing value .9% - 1.0% 1.0% Instruments Measured at Fair Value on a Nonrecurring Basis For assets measured at fair value on a nonrecurring basis during the first nine months of 2016 and 2015 , and still held as of September 30, 2016 and 2015 , the following table provides the adjustments to fair value recognized during the respective periods, the level of valuation inputs used to determine each adjustment, and the carrying value of the related individual assets or portfolios at September 30, 2016 and 2015 . Fair Value Measurements Using (In thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Gains (Losses) Recognized During the Nine Months Ended September 30, 2016 September 30, 2016 Collateral dependent impaired loans $ 1,756 $ — $ — $ 1,756 $ (1,626 ) Mortgage servicing rights 2,533 — — 2,533 (7 ) Foreclosed assets 47 — — 47 (66 ) Long-lived assets 2,232 — — 2,232 (1,001 ) September 30, 2015 Collateral dependent impaired loans $ 6,860 $ — $ — $ 6,860 $ (1,794 ) Mortgage servicing rights 1,461 — — 1,461 59 Foreclosed assets 479 — — 479 (193 ) Long-lived assets 937 — — 937 (1,366 )

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	9 Months Ended
	Sep. 30, 2016
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	Fair Value of Financial Instruments The carrying amounts and estimated fair values of financial instruments held by the Company are set forth below. Fair value estimates are made at a specific point in time based on relevant market information. They do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for many of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, risk characteristics and economic conditions. These estimates are subjective, involve uncertainties, and cannot be determined with precision. Changes in assumptions could significantly affect the estimates. The methods and inputs used in the estimation of fair value for the financial instruments in the table below are discussed in the Fair Value Measurements and the Fair Value of Financial Instruments notes in the Company's 2015 Annual Report on Form 10-K. There have been no significant changes in these methods and inputs since December 31, 2015 . The estimated fair values of the Company’s financial instruments and the classification of their fair value measurement within the valuation hierarchy are as follows: Fair Value Hierarchy Level September 30, 2016 December 31, 2015 (In thousands) Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Financial Assets Loans: Business Level 3 $ 4,770,883 $ 4,819,577 $ 4,397,893 $ 4,421,237 Real estate - construction and land Level 3 800,545 810,403 624,070 633,083 Real estate - business Level 3 2,520,528 2,561,306 2,355,544 2,387,101 Real estate - personal Level 3 1,968,005 1,998,235 1,915,953 1,940,863 Consumer Level 3 1,972,969 1,972,559 1,924,365 1,916,747 Revolving home equity Level 3 417,591 419,543 432,981 434,607 Consumer credit card Level 3 760,022 780,059 779,744 793,428 Overdrafts Level 3 19,698 19,698 6,142 6,142 Loans held for sale Level 2 9,511 9,511 7,607 7,607 Investment securities: Available for sale Level 1 778,694 778,694 747,339 747,339 Available for sale Level 2 8,643,269 8,643,269 9,012,470 9,012,470 Available for sale Level 3 16,908 16,908 17,195 17,195 Trading Level 2 28,586 28,586 11,890 11,890 Non-marketable Level 3 108,224 108,224 112,786 112,786 Federal funds sold Level 1 13,415 13,415 14,505 14,505 Securities purchased under agreements to resell Level 3 725,000 731,362 875,000 879,546 Interest earning deposits with banks Level 1 56,767 56,767 23,803 23,803 Cash and due from banks Level 1 396,938 396,938 464,411 464,411 Derivative instruments Level 2 31,179 31,179 12,507 12,507 Derivative instruments Level 3 877 877 264 264 Assets held in trust for deferred compensation plan Level 1 10,028 10,028 9,278 9,278 Financial Liabilities Non-interest bearing deposits Level 1 $ 7,130,415 $ 7,130,415 $ 7,146,398 $ 7,146,398 Savings, interest checking and money market deposits Level 1 11,023,526 11,023,526 10,834,746 10,834,746 Time open and certificates of deposit Level 3 2,012,219 2,009,071 1,997,709 1,993,521 Federal funds purchased Level 1 293,640 293,640 556,970 556,970 Securities sold under agreements to repurchase Level 3 1,196,251 1,196,339 1,406,582 1,406,670 Other borrowings Level 3 101,415 104,490 103,818 108,542 Derivative instruments Level 2 31,500 31,500 12,534 12,534 Derivative instruments Level 3 272 272 195 195 Liabilities held in trust for deferred compensation plan Level 1 10,028 10,028 9,278 9,278

Legal and Regulatory Proceeding

Legal and Regulatory Proceedings (Notes)	9 Months Ended
	Sep. 30, 2016
Legal Proceedings [Abstract]
Legal Matters and Contingencies [Text Block]	Legal and Regulatory Proceedings On August 15, 2014, a customer filed a class action complaint against the Bank in the Circuit Court, Jackson County, Missouri. The case is Cassandra Warren, et al v. Commerce Bank (Case No. 1416-CV19197). In the case, the customer alleges violation of the Missouri usury statute in connection with the Bank charging overdraft fees in connection with point-of-sale/debit and automated-teller machine cards. The class was certified and consists of Missouri customers of the Bank who may have been similarly affected. The case has been stayed pending the final outcome of a similar case in which a ruling has been made in favor of the bank defendant. The Company believes that the stay will remain in effect until any appeals in the similar case have run their course. The Company believes the Warren complaint lacks merit and will defend itself vigorously. The amount of any ultimate exposure cannot be determined with certainty at this time. The Company is in ongoing discussions with the U.S. Department of Labor concerning an investigation involving ERISA regulations related to a managed trust account. Currently, no assurances can be given as to the timing for the resolution of the investigation or its outcome, including any ultimate liability. The Company has various other legal proceedings pending at September 30, 2016 , arising in the normal course of business. While some matters pending against the Company specify damages claimed by plaintiffs, others do not seek a specified amount of damages or are at very early stages of the legal process. The Company records a loss accrual for all legal and regulatory matters for which it deems a loss is probable and can be reasonably estimated. Some matters, which are in the early stages, have not yet progressed to the point where a loss amount can be determined to be probable and estimable.

Loans And Allowance For Loan 24

Loans And Allowance For Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2016
Loans And Allowance For Loan Losses [Abstract]
Summary Classification Of Held To Maturity Loan Portfolio	Major classifications within the Company’s held for investment loan portfolio at September 30, 2016 and December 31, 2015 are as follows: (In thousands) September 30, 2016 December 31, 2015 Commercial: Business $ 4,770,883 $ 4,397,893 Real estate – construction and land 800,545 624,070 Real estate – business 2,520,528 2,355,544 Personal Banking: Real estate – personal 1,968,005 1,915,953 Consumer 1,972,969 1,924,365 Revolving home equity 417,591 432,981 Consumer credit card 760,022 779,744 Overdrafts 19,698 6,142 Total loans $ 13,230,241 $ 12,436,692
Summary Of Activity In The Allowance For Loan Losses	A summary of the activity in the allowance for loan losses during the three and nine months ended September 30, 2016 and 2015 , respectively, follows: For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total Balance at beginning of period $ 89,198 $ 64,634 $ 153,832 $ 82,086 $ 69,446 $ 151,532 Provision (1,411 ) 8,674 7,263 4,309 21,609 25,918 Deductions: Loans charged off 291 11,872 12,163 2,465 35,633 38,098 Less recoveries on loans 2,759 2,841 5,600 6,325 8,855 15,180 Net loan charge-offs (recoveries) (2,468 ) 9,031 6,563 (3,860 ) 26,778 22,918 Balance September 30, 2016 $ 90,255 $ 64,277 $ 154,532 $ 90,255 $ 64,277 $ 154,532 Balance at beginning of period $ 86,329 $ 65,203 $ 151,532 $ 89,622 $ 66,910 $ 156,532 Provision (1,976 ) 10,340 8,364 (6,089 ) 25,630 19,541 Deductions: Loans charged off 903 11,321 12,224 3,035 34,194 37,229 Less recoveries on loans 1,167 2,693 3,860 4,119 8,569 12,688 Net loan charge-offs (recoveries) (264 ) 8,628 8,364 (1,084 ) 25,625 24,541 Balance September 30, 2015 $ 84,617 $ 66,915 $ 151,532 $ 84,617 $ 66,915 $ 151,532
Allowance For Loan Losses And Related Loan Balance Disaggregated On The Basis Of Impairment Methodology	The following table shows the balance in the allowance for loan losses and the related loan balance at September 30, 2016 and December 31, 2015 , disaggregated on the basis of impairment methodology. Impaired loans evaluated under ASC 310-10-35 include loans on non-accrual status, which are individually evaluated for impairment, and other impaired loans discussed below, which are deemed to have similar risk characteristics and are collectively evaluated. All other loans are collectively evaluated for impairment under ASC 450-20. Impaired Loans All Other Loans (In thousands) Allowance for Loan Losses Loans Outstanding Allowance for Loan Losses Loans Outstanding September 30, 2016 Commercial $ 1,816 $ 44,526 $ 88,439 $ 8,047,430 Personal Banking 1,253 20,594 63,024 5,117,691 Total $ 3,069 $ 65,120 $ 151,463 $ 13,165,121 December 31, 2015 Commercial $ 1,927 $ 43,027 $ 80,159 $ 7,334,480 Personal Banking 1,557 22,287 67,889 5,036,898 Total $ 3,484 $ 65,314 $ 148,048 $ 12,371,378
Investment In Impaired Loans	The table below shows the Company’s investment in impaired loans at September 30, 2016 and December 31, 2015 . These loans consist of all loans on non-accrual status and other restructured loans whose terms have been modified and classified as troubled debt restructurings. These restructured loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. They are discussed further in the "Troubled debt restructurings" section on page 14. (In thousands) Sept. 30, 2016 Dec. 31, 2015 Non-accrual loans $ 15,645 $ 26,575 Restructured loans (accruing) 49,475 38,739 Total impaired loans $ 65,120 $ 65,314
Additional Information About Impaired Loans Held	The following table provides additional information about impaired loans held by the Company at September 30, 2016 and December 31, 2015 , segregated between loans for which an allowance for credit losses has been provided and loans for which no allowance has been provided. (In thousands) Recorded Investment Unpaid Principal Balance Related Allowance September 30, 2016 With no related allowance recorded: Business $ 7,053 $ 10,018 $ — Real estate – construction and land 1,228 1,594 — $ 8,281 $ 11,612 $ — With an allowance recorded: Business $ 28,369 $ 30,171 $ 1,284 Real estate – construction and land 214 219 18 Real estate – business 7,662 9,077 514 Real estate – personal 6,703 9,564 602 Consumer 5,537 5,537 66 Revolving home equity 636 646 18 Consumer credit card 7,718 7,718 567 $ 56,839 $ 62,932 $ 3,069 Total $ 65,120 $ 74,544 $ 3,069 December 31, 2015 With no related allowance recorded: Business $ 9,330 $ 11,777 $ — Real estate – construction and land 2,961 8,956 — Real estate – business 4,793 6,264 — Real estate – personal 373 373 — $ 17,457 $ 27,370 $ — With an allowance recorded: Business $ 18,227 $ 20,031 $ 1,119 Real estate – construction and land 1,227 2,804 63 Real estate – business 6,489 9,008 745 Real estate – personal 7,667 10,530 831 Consumer 5,599 5,599 63 Revolving home equity 704 852 67 Consumer credit card 7,944 7,944 596 $ 47,857 $ 56,768 $ 3,484 Total $ 65,314 $ 84,138 $ 3,484
Total Average Impaired Loans	Total average impaired loans for the three and nine month periods ended September 30, 2016 and 2015 , respectively, are shown in the table below. (In thousands) Commercial Personal Banking Total Average Impaired Loans: For the three months ended September 30, 2016 Non-accrual loans $ 15,106 $ 3,928 $ 19,034 Restructured loans (accruing) 31,372 17,082 48,454 Total $ 46,478 $ 21,010 $ 67,488 For the nine months ended September 30, 2016 Non-accrual loans $ 19,387 $ 4,336 $ 23,723 Restructured loans (accruing) 29,117 17,359 46,476 Total $ 48,504 $ 21,695 $ 70,199 For the three months ended September 30, 2015 Non-accrual loans $ 21,119 $ 5,179 $ 26,298 Restructured loans (accruing) 13,399 18,221 31,620 Total $ 34,518 $ 23,400 $ 57,918 For the nine months ended September 30, 2015 Non-accrual loans $ 25,784 $ 5,791 $ 31,575 Restructured loans (accruing) 16,612 18,854 35,466 Total $ 42,396 $ 24,645 $ 67,041
Interest Income Recognized On Impaired Loans	The table below shows interest income recognized during the three and nine month periods ended September 30, 2016 and 2015 , respectively, for impaired loans held at the end of each respective period. This interest all relates to accruing restructured loans, as discussed in the "Troubled debt restructurings" section on page 14. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2016 2015 2016 2015 Interest income recognized on impaired loans: Business $ 277 $ 63 $ 830 $ 188 Real estate – construction and land 2 22 7 66 Real estate – business 42 33 126 99 Real estate – personal 39 47 118 142 Consumer 89 87 267 261 Revolving home equity 7 6 22 17 Consumer credit card 174 186 522 558 Total $ 630 $ 444 $ 1,892 $ 1,331
Aging Information On Past Due And Nonaccrual Loans	The following table provides aging information on the Company’s past due and accruing loans, in addition to the balances of loans on non-accrual status, at September 30, 2016 and December 31, 2015 . (In thousands) Current or Less Than 30 Days Past Due 30 – 89 Days Past Due 90 Days Past Due and Still Accruing Non-accrual Total September 30, 2016 Commercial: Business $ 4,758,519 $ 3,100 $ 506 $ 8,758 $ 4,770,883 Real estate – construction and land 794,731 2,357 2,147 1,310 800,545 Real estate – business 2,513,270 5,011 327 1,920 2,520,528 Personal Banking: Real estate – personal 1,954,889 6,901 2,581 3,634 1,968,005 Consumer 1,951,011 19,510 2,448 — 1,972,969 Revolving home equity 414,251 2,246 1,071 23 417,591 Consumer credit card 742,820 9,366 7,836 — 760,022 Overdrafts 19,254 444 — — 19,698 Total $ 13,148,745 $ 48,935 $ 16,916 $ 15,645 $ 13,230,241 December 31, 2015 Commercial: Business $ 4,384,149 $ 2,306 $ 564 $ 10,874 $ 4,397,893 Real estate – construction and land 617,838 3,142 — 3,090 624,070 Real estate – business 2,340,919 6,762 — 7,863 2,355,544 Personal Banking: Real estate – personal 1,901,330 7,117 3,081 4,425 1,915,953 Consumer 1,903,389 18,273 2,703 — 1,924,365 Revolving home equity 427,998 2,641 2,019 323 432,981 Consumer credit card 762,750 8,894 8,100 — 779,744 Overdrafts 5,834 308 — — 6,142 Total $ 12,344,207 $ 49,443 $ 16,467 $ 26,575 $ 12,436,692
Credit Quality Of Commercial Loan Portfolio	The following table provides information about the credit quality of the Commercial loan portfolio, using the Company’s internal rating system as an indicator. The internal rating system is a series of grades reflecting management’s risk assessment, based on its analysis of the borrower’s financial condition. The “pass” category consists of a range of loan grades that reflect increasing, though still acceptable, risk. Movement of risk through the various grade levels in the “pass” category is monitored for early identification of credit deterioration. The “special mention” rating is applied to loans where the borrower exhibits negative financial trends due to borrower specific or systemic conditions that, if left uncorrected, threaten its capacity to meet its debt obligations. The borrower is believed to have sufficient financial flexibility to react to and resolve its negative financial situation. It is a transitional grade that is closely monitored for improvement or deterioration. The “substandard” rating is applied to loans where the borrower exhibits well-defined weaknesses that jeopardize its continued performance and are of a severity that the distinct possibility of default exists. Loans are placed on “non-accrual” when management does not expect to collect payments consistent with acceptable and agreed upon terms of repayment. Commercial Loans (In thousands) Business Real Estate-Construction Real Estate- Business Total September 30, 2016 Pass $ 4,625,175 $ 798,168 $ 2,421,327 $ 7,844,670 Special mention 76,105 860 46,281 123,246 Substandard 60,845 207 51,000 112,052 Non-accrual 8,758 1,310 1,920 11,988 Total $ 4,770,883 $ 800,545 $ 2,520,528 $ 8,091,956 December 31, 2015 Pass $ 4,278,857 $ 618,788 $ 2,281,565 $ 7,179,210 Special mention 49,302 1,033 15,009 65,344 Substandard 58,860 1,159 51,107 111,126 Non-accrual 10,874 3,090 7,863 21,827 Total $ 4,397,893 $ 624,070 $ 2,355,544 $ 7,377,507
Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding	For the remainder of loans in the Personal Banking portfolio, the table below shows the percentage of balances outstanding at September 30, 2016 and December 31, 2015 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card September 30, 2016 FICO score: Under 600 1.4 % 4.2 % 1.2 % 4.0 % 600 - 659 3.0 8.5 3.8 11.9 660 - 719 10.3 21.0 13.2 31.4 720 - 779 24.8 26.5 28.1 28.4 780 and over 60.5 39.8 53.7 24.3 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2015 FICO score: Under 600 1.5 % 4.5 % 1.5 % 3.9 % 600 - 659 3.0 9.7 3.9 12.0 660 - 719 9.1 21.8 13.6 31.7 720 - 779 25.0 26.4 28.4 27.9 780 and over 61.4 37.6 52.6 24.5 Total 100.0 % 100.0 % 100.0 % 100.0 %
Outstanding Balance Of Loans Classified As Troubled Debt Restructurings	The following table shows the outstanding balances of loans classified as troubled debt restructurings at September 30, 2016 , in addition to the outstanding balances of these restructured loans which the Company considers to have been in default at any time during the past twelve months. For purposes of this disclosure, the Company considers "default" to mean 90 days or more past due as to interest or principal. (In thousands) September 30, 2016 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 34,227 $ — Real estate - construction and land 784 676 Real estate - business 5,742 751 Personal Banking: Real estate - personal 4,387 358 Consumer 5,560 62 Revolving home equity 613 67 Consumer credit card 7,718 537 Total restructured loans $ 59,031 $ 2,451

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investment Securities [Abstract]
Investment Securities, At Fair Value	nvestment securities, at fair value, consisted of the following at September 30, 2016 and December 31, 2015 . (In thousands) Sept. 30, 2016 Dec. 31, 2015 Available for sale $ 9,438,871 $ 9,777,004 Trading 28,586 11,890 Non-marketable 108,224 112,786 Total investment securities $ 9,575,681 $ 9,901,680
Summary Of Available For Sale Investment Securities By Maturity Groupings	A summary of the available for sale investment securities by maturity groupings as of September 30, 2016 is shown below. The investment portfolio includes agency mortgage-backed securities, which are guaranteed by agencies such as the FHLMC, FNMA, GNMA and FDIC, in addition to non-agency mortgage-backed securities, which have no guarantee but are collateralized by residential mortgages. Also included are certain other asset-backed securities, which are primarily collateralized by credit cards, automobiles, student loans, and commercial loans. These securities differ from traditional debt securities primarily in that they may have uncertain maturity dates and are priced based on estimated prepayment rates on the underlying collateral. (In thousands) Amortized Cost Fair Value U.S. government and federal agency obligations: Within 1 year $ 59,068 $ 60,028 After 1 but within 5 years 500,823 514,620 After 5 but within 10 years 106,427 110,802 After 10 years 72,340 70,199 Total U.S. government and federal agency obligations 738,658 755,649 Government-sponsored enterprise obligations: Within 1 year 11,589 11,627 After 1 but within 5 years 419,071 424,410 After 5 but within 10 years 14,988 15,205 Total government-sponsored enterprise obligations 445,648 451,242 State and municipal obligations: Within 1 year 153,968 155,078 After 1 but within 5 years 626,147 641,498 After 5 but within 10 years 941,494 983,236 After 10 years 55,248 56,189 Total state and municipal obligations 1,776,857 1,836,001 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,590,902 2,663,677 Non-agency mortgage-backed securities 922,302 937,208 Asset-backed securities 2,403,019 2,409,324 Total mortgage and asset-backed securities 5,916,223 6,010,209 Other debt securities: Within 1 year 5,997 6,025 After 1 but within 5 years 97,136 98,939 After 5 but within 10 years 214,311 222,376 After 10 years 11,588 11,472 Total other debt securities 329,032 338,812 Equity securities 5,678 46,958 Total available for sale investment securities $ 9,212,096 $ 9,438,871
Available For Sale Securities Unrealized Gains And Losses By Security Type	For securities classified as available for sale, the following table shows the unrealized gains and losses (pre-tax) in accumulated other comprehensive income, by security type. (In thousands) Amortized Cost Gross Gross Fair Value September 30, 2016 U.S. government and federal agency obligations $ 738,658 $ 19,132 $ (2,141 ) $ 755,649 Government-sponsored enterprise obligations 445,648 5,637 (43 ) 451,242 State and municipal obligations 1,776,857 59,760 (616 ) 1,836,001 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,590,902 72,803 (28 ) 2,663,677 Non-agency mortgage-backed securities 922,302 15,145 (239 ) 937,208 Asset-backed securities 2,403,019 14,026 (7,721 ) 2,409,324 Total mortgage and asset-backed securities 5,916,223 101,974 (7,988 ) 6,010,209 Other debt securities 329,032 9,946 (166 ) 338,812 Equity securities 5,678 41,280 — 46,958 Total $ 9,212,096 $ 237,729 $ (10,954 ) $ 9,438,871 December 31, 2015 U.S. government and federal agency obligations $ 729,846 $ 5,051 $ (7,821 ) $ 727,076 Government-sponsored enterprise obligations 794,912 2,657 (4,546 ) 793,023 State and municipal obligations 1,706,635 37,061 (1,739 ) 1,741,957 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,579,031 47,856 (8,606 ) 2,618,281 Non-agency mortgage-backed securities 879,186 8,596 (7,819 ) 879,963 Asset-backed securities 2,660,201 1,287 (17,107 ) 2,644,381 Total mortgage and asset-backed securities 6,118,418 57,739 (33,532 ) 6,142,625 Other debt securities 335,925 377 (4,982 ) 331,320 Equity securities 5,678 35,325 — 41,003 Total $ 9,691,414 $ 138,210 $ (52,620 ) $ 9,777,004
Cash Flow Model Inputs Used To Calculate Credit Losses	ignificant inputs to the cash flow models used to calculate the credit losses on these securities at September 30, 2016 included the following: Significant Inputs Range Prepayment CPR 0% - 25% Projected cumulative default 18% - 51% Credit support 0% - 30% Loss severity 17% - 63%
Changes In Recorded Credit Losses	The following table presents a rollforward of the cumulative OTTI credit losses recognized in earnings on all available for sale debt securities. For the Nine Months Ended September 30 (In thousands) 2016 2015 Cumulative OTTI credit losses at January 1 $ 14,129 $ 13,734 Credit losses on debt securities for which impairment was not previously recognized — 76 Credit losses on debt securities for which impairment was previously recognized 270 407 Increase in expected cash flows that are recognized over remaining life of security (171 ) (73 ) Cumulative OTTI credit losses at September 30 $ 14,228 $ 14,144
Securities With Unrealized Losses And Length Of Impairment Period	Securities with unrealized losses recorded in accumulated other comprehensive income are shown in the table below, along with the length of the impairment period. Less than 12 months 12 months or longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2016 U.S. government and federal agency obligations $ 36,586 $ 61 $ 33,613 $ 2,080 $ 70,199 $ 2,141 Government-sponsored enterprise obligations 49,901 43 — — 49,901 43 State and municipal obligations 26,335 227 16,276 389 42,611 616 Mortgage and asset-backed securities: Agency mortgage-backed securities 24,564 23 2,304 5 26,868 28 Non-agency mortgage-backed securities 61,283 127 39,070 112 100,353 239 Asset-backed securities 279,282 1,510 365,402 6,211 644,684 7,721 Total mortgage and asset-backed securities 365,129 1,660 406,776 6,328 771,905 7,988 Other debt securities 7,936 36 12,458 130 20,394 166 Total $ 485,887 $ 2,027 $ 469,123 $ 8,927 $ 955,010 $ 10,954 December 31, 2015 U.S. government and federal agency obligations $ 491,998 $ 3,098 $ 31,012 $ 4,723 $ 523,010 $ 7,821 Government-sponsored enterprise obligations 157,830 1,975 110,250 2,571 268,080 4,546 State and municipal obligations 66,998 544 31,120 1,195 98,118 1,739 Mortgage and asset-backed securities: Agency mortgage-backed securities 530,035 2,989 291,902 5,617 821,937 8,606 Non-agency mortgage-backed securities 653,603 7,059 54,536 760 708,139 7,819 Asset-backed securities 2,207,922 12,492 223,311 4,615 2,431,233 17,107 Total mortgage and asset-backed securities 3,391,560 22,540 569,749 10,992 3,961,309 33,532 Other debt securities 244,452 3,687 25,218 1,295 269,670 4,982 Total $ 4,352,838 $ 31,844 $ 767,349 $ 20,776 $ 5,120,187 $ 52,620
Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses	The following table presents proceeds from sales of securities and the components of investment securities gains and losses which have been recognized in earnings. For the Nine Months Ended September 30 (In thousands) 2016 2015 Proceeds from sales of available for sale securities $ — $ 675,870 Proceeds from sales of non-marketable securities 7,946 9,023 Total proceeds $ 7,946 $ 684,893 Available for sale: Gains realized on sales $ — $ 2,813 Other-than-temporary impairment recognized on debt securities (270 ) (483 ) Non-marketable: Gains realized on sales 3,717 2,516 Losses realized on sales (502 ) — Fair value adjustments, net (6,649 ) 2,954 Investment securities gains (losses), net $ (3,704 ) $ 7,800

Goodwill And Other Intangible26

Goodwill And Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule Of Intangible Assets With Estimable Useful Lives	The following table presents information about the Company's intangible assets which have estimable useful lives. September 30, 2016 December 31, 2015 (In thousands) Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Gross Carrying Amount Accumulated Amortization Valuation Allowance Net Amount Amortizable intangible assets: Core deposit premium $ 31,270 $ (27,182 ) $ — $ 4,088 $ 31,270 $ (26,239 ) $ — $ 5,031 Mortgage servicing rights 5,260 (2,691 ) (36 ) 2,533 4,638 (2,971 ) (29 ) 1,638 Total $ 36,530 $ (29,873 ) $ (36 ) $ 6,621 $ 35,908 $ (29,210 ) $ (29 ) $ 6,669
Schedule of Estimated Annual Amortization Expense	he following table shows the estimated annual amortization expense for the next five fiscal years. This expense is based on existing asset balances and the interest rate environment as of September 30, 2016 . The Company’s actual amortization expense in any given period may be different from the estimated amounts depending upon the acquisition of intangible assets, changes in mortgage interest rates, prepayment rates and other market conditions. (In thousands) 2016 $ 1,584 2017 1,210 2018 931 2019 770 2020 630
Schedule Of Changes In CArrying Amount Of Goodwill And Net Other Intangible Assets	Changes in the carrying amount of goodwill and net other intangible assets for the nine month period ended September 30, 2016 is as follows: (In thousands) Goodwill Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2016 $ 138,921 $ 5,031 $ 1,638 Originations — — 1,127 Amortization — (943 ) (225 ) Impairment — — (7 ) Balance September 30, 2016 $ 138,921 $ 4,088 $ 2,533
Schedule Of Goodwill Allocated By Operating Segments	Goodwill allocated to the Company’s operating segments at September 30, 2016 and December 31, 2015 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Pension (Tables)

Pension (Tables)	9 Months Ended
	Sep. 30, 2016
Pension [Abstract]
Net Pension Cost	The amount of net pension cost is shown in the table below: For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2016 2015 2016 2015 Service cost - benefits earned during the period $ 135 $ 127 $ 406 $ 379 Interest cost on projected benefit obligation 986 1,139 2,958 3,571 Expected return on plan assets (1,437 ) (1,523 ) (4,313 ) (4,569 ) Amortization of prior service cost (68 ) (203 ) (203 ) (203 ) Amortization of unrecognized net loss 647 660 1,940 1,969 Net periodic pension cost $ 263 $ 200 $ 788 $ 1,147

Common Stock (Tables)

Common Stock (Tables)	9 Months Ended
	Sep. 30, 2016
Common Stock [Abstract]
Summary Of Components Used To Calculate Basic And Diluted Income Per Share	Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that contain nonforfeitable rights to dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 12. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands, except per share data) 2016 2015 2016 2015 Basic income per common share: Net income available to common shareholders $ 66,295 $ 62,362 $ 197,062 $ 193,270 Less income allocated to nonvested restricted stock 913 884 2,747 2,677 Net income allocated to common stock $ 65,382 $ 61,478 $ 194,315 $ 190,593 Weighted average common shares outstanding 95,426 96,589 95,458 98,568 Basic income per common share $ .69 $ .63 $ 2.04 $ 1.93 Diluted income per common share: Net income available to common shareholders $ 66,295 $ 62,362 $ 197,062 $ 193,270 Less income allocated to nonvested restricted stock 912 883 2,743 2,672 Net income allocated to common stock $ 65,383 $ 61,479 $ 194,319 $ 190,598 Weighted average common shares outstanding 95,426 96,589 95,458 98,568 Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods 243 293 236 315 Weighted average diluted common shares outstanding 95,669 96,882 95,694 98,883 Diluted income per common share $ .68 $ .63 $ 2.03 $ 1.93

Accumulated Other Comprehensi29

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of Accumulated Other Comprehensive Income	The table below shows the activity and accumulated balances for components of other comprehensive income. The largest component is the unrealized holding gains and losses on available for sale securities. Unrealized gains and losses on debt securities for which an other-than-temporary impairment (OTTI) has been recorded in current earnings are shown separately below. The other component is the amortization from other comprehensive income of losses associated with pension benefits, which occurs as the losses are included in current net periodic pension cost. Unrealized Gains (Losses) on Securities (1) Pension Loss (2) Total Accumulated Other Comprehensive Income (In thousands) OTTI Other Balance January 1, 2016 $ 3,316 $ 49,750 $ (20,596 ) $ 32,470 Other comprehensive income (loss) before reclassifications (837 ) 141,752 — 140,915 Amounts reclassified from accumulated other comprehensive income 270 — 1,737 2,007 Current period other comprehensive income (loss), before tax (567 ) 141,752 1,737 142,922 Income tax (expense) benefit 215 (53,865 ) (660 ) (54,310 ) Current period other comprehensive income (loss), net of tax (352 ) 87,887 1,077 88,612 Balance September 30, 2016 $ 2,964 $ 137,637 $ (19,519 ) $ 121,082 Balance January 1, 2015 $ 3,791 $ 81,310 $ (23,008 ) $ 62,093 Other comprehensive income (loss) before reclassifications (976 ) 7,255 — 6,279 Amounts reclassified from accumulated other comprehensive income 483 (2,813 ) 1,766 (564 ) Current period other comprehensive income (loss), before tax (493 ) 4,442 1,766 5,715 Income tax (expense) benefit 187 (1,688 ) (671 ) (2,172 ) Current period other comprehensive income (loss), net of tax (306 ) 2,754 1,095 3,543 Transfer of unrealized gain on securities for which impairment was not previously recognized 43 (43 ) — — Balance September 30, 2015 $ 3,528 $ 84,021 $ (21,913 ) $ 65,636

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Schedule Of Financial Information By Segment	he following table presents selected financial information by segment and reconciliations of combined segment totals to consolidated totals. There were no material intersegment revenues among the three segments. Management periodically makes changes to methods of assigning costs and income to its business segments to better reflect operating results. If appropriate, these change are reflected in prior year information presented below. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended September 30, 2016 Net interest income $ 67,375 $ 78,537 $ 10,782 $ 156,694 $ 14,549 $ 171,243 Provision for loan losses (9,033 ) 2,432 (5 ) (6,606 ) (657 ) (7,263 ) Non-interest income 34,229 49,832 36,675 120,736 (1,417 ) 119,319 Investment securities losses, net — — — — (1,965 ) (1,965 ) Non-interest expense (70,113 ) (71,425 ) (28,185 ) (169,723 ) (11,519 ) (181,242 ) Income before income taxes $ 22,458 $ 59,376 $ 19,267 $ 101,101 $ (1,009 ) $ 100,092 Nine Months Ended September 30, 2016 Net interest income $ 201,166 $ 231,552 $ 32,604 $ 465,322 $ 41,525 $ 506,847 Provision for loan losses (26,533 ) 3,919 (120 ) (22,734 ) (3,184 ) (25,918 ) Non-interest income 97,165 149,240 107,696 354,101 812 354,913 Investment securities losses, net — — — — (3,704 ) (3,704 ) Non-interest expense (209,649 ) (211,961 ) (85,025 ) (506,635 ) (29,169 ) (535,804 ) Income before income taxes $ 62,149 $ 172,750 $ 55,155 $ 290,054 $ 6,280 $ 296,334 Three Months Ended September 30, 2015 Net interest income $ 67,085 $ 74,476 $ 10,427 $ 151,988 $ 10,050 $ 162,038 Provision for loan losses (8,605 ) 166 106 (8,333 ) (31 ) (8,364 ) Non-interest income 31,099 47,486 33,980 112,565 (1,277 ) 111,288 Investment securities losses, net — — — — (378 ) (378 ) Non-interest expense (69,158 ) (68,713 ) (27,182 ) (165,053 ) (6,349 ) (171,402 ) Income before income taxes $ 20,421 $ 53,415 $ 17,331 $ 91,167 $ 2,015 $ 93,182 Nine Months Ended September 30, 2015 Net interest income $ 199,265 $ 218,699 $ 31,921 $ 449,885 $ 21,948 $ 471,833 Provision for loan losses (25,500 ) 842 114 (24,544 ) 5,003 (19,541 ) Non-interest income 87,462 144,685 102,517 334,664 (2,567 ) 332,097 Investment securities gains, net — — — — 7,800 7,800 Non-interest expense (203,440 ) (199,097 ) (81,432 ) (483,969 ) (16,741 ) (500,710 ) Income before income taxes $ 57,787 $ 165,129 $ 53,120 $ 276,036 $ 15,443 $ 291,479

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instrument Detail [Abstract]
Schedule Of Notional Amounts Of Derivative Instruments	(In thousands) September 30, 2016 December 31, 2015 Interest rate swaps $ 1,320,674 $ 1,020,310 Interest rate caps 60,954 66,118 Credit risk participation agreements 63,117 62,456 Foreign exchange contracts 3,792 15,535 Mortgage loan commitments 24,301 8,605 Mortgage loan forward sale contracts 518 642 Forward TBA contracts 25,500 11,000 Total notional amount $ 1,498,856 $ 1,184,666
Schedule Of Fair Values Of Derivative Instruments	The fair values of the Company's derivative instruments, whose notional amounts are listed above, are shown in the table below. Derivative instruments with a positive fair value (asset derivatives) are reported in other assets in the consolidated balance sheets, while derivative instruments with a negative fair value (liability derivatives) are reported in other liabilities in the consolidated balance sheets. Information about the valuation methods used to determine fair value is provided in Note 13 on Fair Value Measurements. Asset Derivatives Liability Derivatives Sept. 30, 2016 Dec. 31, 2015 Sept. 30, 2016 Dec. 31, 2015 (In thousands ) Fair Value Fair Value Derivative instruments: Interest rate swaps $ 31,135 $ 11,993 $ (31,343 ) $ (11,993 ) Interest rate caps 36 73 (36 ) (73 ) Credit risk participation agreements 1 1 (272 ) (195 ) Foreign exchange contracts 5 437 (10 ) (430 ) Mortgage loan commitments 876 263 — — Mortgage loan forward sale contracts 1 — — — Forward TBA contracts 2 4 (111 ) (38 ) Total $ 32,056 $ 12,771 $ (31,772 ) $ (12,729 )
Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income	The effects of derivative instruments on the consolidated statements of income are shown in the table below. Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2016 2015 2016 2015 Derivative instruments: Interest rate swaps Other non-interest income $ 203 $ 741 $ 3,198 $ 3,551 Credit risk participation agreements Other non-interest income 50 (57 ) (8 ) (9 ) Foreign exchange contracts Other non-interest income (20 ) (55 ) (12 ) 267 Mortgage loan commitments Loan fees and sales 86 106 613 451 Mortgage loan forward sale contracts Loan fees and sales 1 (6 ) 1 (5 ) Forward TBA contracts Loan fees and sales (172 ) (370 ) (898 ) 15 Total $ 148 $ 359 $ 2,894 $ 4,270
Balance Sheet Offsetting, Derivatives [Table Text Block]	Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Collateral Received/Pledged Net Amount September 30, 2016 Assets: Derivatives subject to master netting agreements $ 31,174 $ — $ 31,174 $ (38 ) $ — $ 31,136 Derivatives not subject to master netting agreements 882 — 882 Total derivatives 32,056 — 32,056 Liabilities: Derivatives subject to master netting agreements $ 31,762 $ — $ 31,762 $ (38 ) $ (30,319 ) $ 1,405 Derivatives not subject to master netting agreements 10 — 10 Total derivatives 31,772 — 31,772 December 31, 2015 Assets: Derivatives subject to master netting agreements $ 12,071 $ — $ 12,071 $ (94 ) $ — $ 11,977 Derivatives not subject to master netting agreements 700 — 700 Total derivatives 12,771 — 12,771 Liabilities: Derivatives subject to master netting agreements $ 12,299 $ — $ 12,299 $ (94 ) $ (10,927 ) $ 1,278 Derivatives not subject to master netting agreements 430 — 430 Total derivatives 12,729 — 12,729

Resale and Repurchase Agreeme32

Resale and Repurchase Agreements (Tables)	9 Months Ended
	Sep. 30, 2016
Resale and Repurchase Agreements [Abstract]
Resale and Repurchase Agreements [Table Text Block]	Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Available for Offset Securities Collateral Received/Pledged Net Amount September 30, 2016 Total resale agreements, subject to master netting arrangements $ 1,275,000 $ (550,000 ) $ 725,000 $ — $ (725,000 ) $ — Total repurchase agreements, subject to master netting arrangements 1,746,251 (550,000 ) 1,196,251 — (1,196,251 ) — December 31, 2015 Total resale agreements, subject to master netting arrangements $ 1,425,000 $ (550,000 ) $ 875,000 $ — $ (875,000 ) $ — Total repurchase agreements, subject to master netting arrangements 1,956,582 (550,000 ) 1,406,582 — (1,406,582 ) —
Schedule of Underlying Assets of Repurchase Agreements [Table Text Block]	Remaining Contractual Maturity of the Agreements (In thousands) Overnight and continuous Up to 90 days Greater than 90 days Total September 30, 2016 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 228,435 $ — $ 300,000 $ 528,435 Government-sponsored enterprise obligations 185,224 — 2,728 187,952 Agency mortgage-backed securities 367,145 2,908 252,982 623,035 Asset-backed securities 306,829 100,000 — 406,829 Total repurchase agreements, gross amount recognized $ 1,087,633 $ 102,908 $ 555,710 $ 1,746,251 December 31, 2015 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 210,346 $ — $ 300,000 $ 510,346 Government-sponsored enterprise obligations 356,970 — 24,096 381,066 Agency mortgage-backed securities 579,974 2,292 225,904 808,170 Asset-backed securities 212,000 45,000 — 257,000 Total repurchase agreements, gross amount recognized $ 1,359,290 $ 47,292 $ 550,000 $ 1,956,582

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Share-based Compensation [Abstract]
Summary Of The Status Of Nonvested Share Awards	A summary of the status of the Company’s nonvested share awards as of September 30, 2016 , and changes during the nine month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2016 1,384,417 $34.38 Granted 221,222 42.17 Vested (249,953 ) 30.51 Forfeited (28,618 ) 36.52 Nonvested at September 30, 2016 1,327,068 $36.36
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The current year per share average fair value and the model assumptions are shown in the table below. Weighted per share average fair value at grant date $7.49 Assumptions: Dividend yield 2.2 % Volatility 21.2 % Risk-free interest rate 1.8 % Expected term 7.2 years
Summary Of SAR Activity	A summary of SAR activity during the first nine months of 2016 is presented below. (Dollars in thousands, except per share data) Rights Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2016 1,588,457 $33.74 Granted 251,982 41.35 Forfeited (13,916 ) 38.06 Expired (1,375 ) 37.19 Exercised (469,903 ) 31.37 Outstanding at September 30, 2016 1,355,245 $35.93 5.6 years $ 18,068

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Measurements [Abstract]
Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The table below presents the September 30, 2016 and December 31, 2015 carrying values of assets and liabilities measured at fair value on a recurring basis. There were no transfers among levels during the first nine months of 2016 or the year ended December 31, 2015 . Fair Value Measurements Using (In thousands) Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2016 Assets: Residential mortgage loans held for sale $ 4,447 $ — $ 4,447 $ — Available for sale securities: U.S. government and federal agency obligations 755,649 755,649 — — Government-sponsored enterprise obligations 451,242 — 451,242 — State and municipal obligations 1,836,001 — 1,819,093 16,908 Agency mortgage-backed securities 2,663,677 — 2,663,677 — Non-agency mortgage-backed securities 937,208 — 937,208 — Asset-backed securities 2,409,324 — 2,409,324 — Other debt securities 338,812 — 338,812 — Equity securities 46,958 23,045 23,913 — Trading securities 28,586 — 28,586 — Private equity investments 59,486 — — 59,486 Derivatives * 32,056 — 31,179 877 Assets held in trust for deferred compensation plan 10,028 10,028 — — Total assets 9,573,474 788,722 8,707,481 77,271 Liabilities: Derivatives * 31,772 — 31,500 272 Liabilities held in trust for deferred compensation plan 10,028 10,028 — — Total liabilities $ 41,800 $ 10,028 $ 31,500 $ 272 December 31, 2015 Assets: Residential mortgage loans held for sale $ 4,981 $ — $ 4,981 $ — Available for sale securities: U.S. government and federal agency obligations 727,076 727,076 — — Government-sponsored enterprise obligations 793,023 — 793,023 — State and municipal obligations 1,741,957 — 1,724,762 17,195 Agency mortgage-backed securities 2,618,281 — 2,618,281 — Non-agency mortgage-backed securities 879,963 — 879,963 — Asset-backed securities 2,644,381 — 2,644,381 — Other debt securities 331,320 — 331,320 — Equity securities 41,003 20,263 20,740 — Trading securities 11,890 — 11,890 — Private equity investments 63,032 — — 63,032 Derivatives * 12,771 — 12,507 264 Assets held in trust for deferred compensation plan 9,278 9,278 — — Total assets 9,878,956 756,617 9,041,848 80,491 Liabilities: Derivatives * 12,729 — 12,534 195 Liabilities held in trust for deferred compensation plan 9,278 9,278 — — Total liabilities $ 22,007 $ 9,278 $ 12,534 $ 195
Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are summarized as follows: Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (In thousands) State and Municipal Obligations Private Equity Investments Derivatives Total For the three months ended September 30, 2016 Balance June 30, 2016 $ 17,679 $ 62,813 $ 502 $ 80,994 Total gains or losses (realized/unrealized): Included in earnings — (2,921 ) 136 (2,785 ) Included in other comprehensive income * 317 — — 317 Investment securities called (1,100 ) — — (1,100 ) Discount accretion 12 — — 12 Purchases of private equity investments — 2,894 — 2,894 Sale/pay down of private equity investments — (3,315 ) — (3,315 ) Capitalized interest/dividends — 15 — 15 Sale of risk participation agreement — — (33 ) (33 ) Balance September 30, 2016 $ 16,908 $ 59,486 $ 605 $ 76,999 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2016 $ — $ (2,921 ) $ 926 $ (1,995 ) For the nine months ended September 30, 2016 Balance January 1, 2016 $ 17,195 $ 63,032 $ 69 $ 80,296 Total gains or losses (realized/unrealized): Included in earnings — (6,645 ) 605 (6,040 ) Included in other comprehensive income * 819 — — 819 Investment securities called (1,200 ) — — (1,200 ) Discount accretion 94 — — 94 Purchases of private equity investments — 8,735 — 8,735 Sale/pay down of private equity investments — (5,713 ) — (5,713 ) Capitalized interest/dividends — 77 — 77 Sale of risk participation agreement — — (69 ) (69 ) Balance September 30, 2016 $ 16,908 $ 59,486 $ 605 $ 76,999 Total gains or losses for the nine months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2016 $ — $ (6,545 ) $ 868 $ (5,677 ) For the three months ended September 30, 2015 Balance June 30, 2015 $ 92,940 $ 58,726 $ 170 $ 151,836 Total gains or losses (realized/unrealized): Included in earnings — (1,221 ) 49 (1,172 ) Included in other comprehensive income * 227 — — 227 Discount accretion 22 — — 22 Purchases of private equity investments — 9,370 — 9,370 Balance September 30, 2015 $ 93,189 $ 66,875 $ 219 $ 160,283 Total gains or losses for the three months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2015 $ — $ (1,221 ) $ 394 $ (827 ) For the nine months ended September 30, 2015 Balance January 1, 2015 $ 95,143 $ 57,581 $ (223 ) $ 152,501 Total gains or losses (realized/unrealized): Included in earnings — 2,954 442 3,396 Included in other comprehensive income * (127 ) — — (127 ) Investment securities called (2,000 ) — — (2,000 ) Discount accretion 173 — — 173 Purchases of private equity investments — 11,023 — 11,023 Sale/pay down of private equity investments — (4,800 ) — (4,800 ) Capitalized interest/dividends — 117 — 117 Balance September 30, 2015 $ 93,189 $ 66,875 $ 219 $ 160,283 Total gains or losses for the nine months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2015 $ — $ 2,954 $ 442 $ 3,396
Summary Of Gains And Losses On Level 3 Assets And Liabilities	Gains and losses included in earnings for the Level 3 assets and liabilities in the previous table are reported in the following line items in the consolidated statements of income: (In thousands) Loan Fees and Sales Other Non-Interest Income Investment Securities Gains (Losses), Net Total For the three months ended September 30, 2016 Total gains or losses included in earnings $ 86 $ 50 $ (2,921 ) $ (2,785 ) Change in unrealized gains or losses relating to assets still held at September 30, 2016 $ 876 $ 50 $ (2,921 ) $ (1,995 ) For the nine months ended September 30, 2016 Total gains or losses included in earnings $ 613 $ (8 ) $ (6,645 ) $ (6,040 ) Change in unrealized gains or losses relating to assets still held at September 30, 2016 $ 876 $ (8 ) $ (6,545 ) $ (5,677 ) For the three months ended September 30, 2015 Total gains or losses included in earnings $ 106 $ (57 ) $ (1,221 ) $ (1,172 ) Change in unrealized gains or losses relating to assets still held at September 30, 2015 $ 451 $ (57 ) $ (1,221 ) $ (827 ) For the nine months ended September 30, 2015 Total gains or losses included in earnings $ 451 $ (9 ) $ 2,954 $ 3,396 Change in unrealized gains or losses relating to assets still held at September 30, 2015 $ 451 $ (9 ) $ 2,954 $ 3,396
Summary Of Quantitative Information About Level 3 Fair Value Measurements	s The Company's significant Level 3 measurements which employ unobservable inputs that are readily quantifiable pertain to auction rate securities (ARS) held by the Bank, investments in portfolio concerns held by the Company's private equity subsidiaries, and held for sale residential mortgage loan commitments. ARS are included in state and municipal securities and totaled $16.9 million at September 30, 2016 , while private equity investments, included in non-marketable securities, totaled $59.5 million . Information about these inputs is presented in the table and discussions below. Quantitative Information about Level 3 Fair Value Measurements Weighted Valuation Technique Unobservable Input Range Average Auction rate securities Discounted cash flow Estimated market recovery period 5 years Estimated market rate 2.4% - 3.3% Private equity investments Market comparable companies EBITDA multiple 4.0 - 5.5 Mortgage loan commitments Discounted cash flow Probability of funding 55.3% - 97.7% 76.8% Embedded servicing value .9% - 1.0% 1.0%
Schedule Of Fair Value Disclosures Measured On Nonrecurring Basis [Table Text Block]	s For assets measured at fair value on a nonrecurring basis during the first nine months of 2016 and 2015 , and still held as of September 30, 2016 and 2015 , the following table provides the adjustments to fair value recognized during the respective periods, the level of valuation inputs used to determine each adjustment, and the carrying value of the related individual assets or portfolios at September 30, 2016 and 2015 . Fair Value Measurements Using (In thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Gains (Losses) Recognized During the Nine Months Ended September 30, 2016 September 30, 2016 Collateral dependent impaired loans $ 1,756 $ — $ — $ 1,756 $ (1,626 ) Mortgage servicing rights 2,533 — — 2,533 (7 ) Foreclosed assets 47 — — 47 (66 ) Long-lived assets 2,232 — — 2,232 (1,001 ) September 30, 2015 Collateral dependent impaired loans $ 6,860 $ — $ — $ 6,860 $ (1,794 ) Mortgage servicing rights 1,461 — — 1,461 59 Foreclosed assets 479 — — 479 (193 ) Long-lived assets 937 — — 937 (1,366 )

Fair Value Of Financial Instr35

Fair Value Of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Of Financial Instruments [Abstract]
Fair value of financial instruments [Table Text Block]	Fair Value Hierarchy Level September 30, 2016 December 31, 2015 (In thousands) Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Financial Assets Loans: Business Level 3 $ 4,770,883 $ 4,819,577 $ 4,397,893 $ 4,421,237 Real estate - construction and land Level 3 800,545 810,403 624,070 633,083 Real estate - business Level 3 2,520,528 2,561,306 2,355,544 2,387,101 Real estate - personal Level 3 1,968,005 1,998,235 1,915,953 1,940,863 Consumer Level 3 1,972,969 1,972,559 1,924,365 1,916,747 Revolving home equity Level 3 417,591 419,543 432,981 434,607 Consumer credit card Level 3 760,022 780,059 779,744 793,428 Overdrafts Level 3 19,698 19,698 6,142 6,142 Loans held for sale Level 2 9,511 9,511 7,607 7,607 Investment securities: Available for sale Level 1 778,694 778,694 747,339 747,339 Available for sale Level 2 8,643,269 8,643,269 9,012,470 9,012,470 Available for sale Level 3 16,908 16,908 17,195 17,195 Trading Level 2 28,586 28,586 11,890 11,890 Non-marketable Level 3 108,224 108,224 112,786 112,786 Federal funds sold Level 1 13,415 13,415 14,505 14,505 Securities purchased under agreements to resell Level 3 725,000 731,362 875,000 879,546 Interest earning deposits with banks Level 1 56,767 56,767 23,803 23,803 Cash and due from banks Level 1 396,938 396,938 464,411 464,411 Derivative instruments Level 2 31,179 31,179 12,507 12,507 Derivative instruments Level 3 877 877 264 264 Assets held in trust for deferred compensation plan Level 1 10,028 10,028 9,278 9,278 Financial Liabilities Non-interest bearing deposits Level 1 $ 7,130,415 $ 7,130,415 $ 7,146,398 $ 7,146,398 Savings, interest checking and money market deposits Level 1 11,023,526 11,023,526 10,834,746 10,834,746 Time open and certificates of deposit Level 3 2,012,219 2,009,071 1,997,709 1,993,521 Federal funds purchased Level 1 293,640 293,640 556,970 556,970 Securities sold under agreements to repurchase Level 3 1,196,251 1,196,339 1,406,582 1,406,670 Other borrowings Level 3 101,415 104,490 103,818 108,542 Derivative instruments Level 2 31,500 31,500 12,534 12,534 Derivative instruments Level 3 272 272 195 195 Liabilities held in trust for deferred compensation plan Level 1 10,028 10,028 9,278 9,278

Loans And Allowance For Loan 36

Loans And Allowance For Loan Losses (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Abstract]
Loans pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits	$ 3,600,000,000
Loans Pledged to the Federal Reserve Bank as collateral for discount window borrowings	1,600,000,000
Troubled Debt Restructured Loans	59,000,000
Accruing Restructured Loans	49,475,000	$ 38,739,000
Restructured Loans NonAccrual	9,600,000
Restructured commercial loans performing under their modified terms	33,200,000
Aggregate restructured credit card loans held	7,700,000
Restructured Loans Due to Bankruptcy Proceeding	$ 8,200,000
Period after which loans are deemed in default (in days)	90 days
Effect on Interest Income Resulting From Modification to Credit Card Loans	$ (926,000)
Commitments to lend additional funds to customers with restructured loans	11,500,000
Fair Value of Personal Real Estate Loans Held for Sale	4,400,000
Unpaid Principal Balance on Personal Real Estate Loans Held for Sale	4,300,000
Student Loans Held for Sale, Lower of Cost or Fair Value	5,100,000
Cost of Auto Loans Sold	33,600,000
Gain (Loss) on Sales of Loans, Net	56,000
Non-accrual HFS loans	0
Loans HFS 90 Days Past Due and Still Accruing	0
Foreclosed real estate	950,000	2,800,000
Personal property acquired in repossession	$ 2,500,000	$ 3,300,000

Loans And Allowance For Loan 37

Loans And Allowance For Loan Losses (Summary Classification Of Held To Maturity Loan Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 13,230,241	$ 12,436,692
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	4,770,883	4,397,893
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	800,545	624,070
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	2,520,528	2,355,544
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	1,968,005	1,915,953
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	1,972,969	1,924,365
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	417,591	432,981
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	760,022	779,744
Overdrafts [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 19,698	$ 6,142

Loans And Allowance For Loan 38

Loans And Allowance For Loan Losses (Summary Of Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 153,832	$ 151,532	$ 151,532	$ 156,532
Provision	7,263	8,364	25,918	19,541
Loans charged off	12,163	12,224	38,098	37,229
Less recoveries on loans	5,600	3,860	15,180	12,688
Net loan charge-offs (recoveries)	6,563	8,364	22,918	24,541
Balance at end of period	154,532	151,532	154,532	151,532
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	89,198	86,329	82,086	89,622
Provision	(1,411)	(1,976)	4,309	(6,089)
Loans charged off	291	903	2,465	3,035
Less recoveries on loans	2,759	1,167	6,325	4,119
Net loan charge-offs (recoveries)	(2,468)	(264)	(3,860)	(1,084)
Balance at end of period	90,255	84,617	90,255	84,617
Personal Banking Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	64,634	65,203	69,446	66,910
Provision	8,674	10,340	21,609	25,630
Loans charged off	11,872	11,321	35,633	34,194
Less recoveries on loans	2,841	2,693	8,855	8,569
Net loan charge-offs (recoveries)	9,031	8,628	26,778	25,625
Balance at end of period	$ 64,277	$ 66,915	$ 64,277	$ 66,915

Loans And Allowance For Loan 39

Loans And Allowance For Loan Losses (Allowance For Loan Losses And Related Loan Balance Disaggregated On The Basis Of Impairment Methodology) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Line Items]
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	$ 13,165,121	$ 12,371,378
Impaired Financing Receivable, Recorded Investment	65,120	65,314
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	151,463	148,048
Impaired Financing Receivable, Related Allowance	3,069	3,484
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	8,047,430	7,334,480
Impaired Financing Receivable, Recorded Investment	44,526	43,027
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	88,439	80,159
Impaired Financing Receivable, Related Allowance	1,816	1,927
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	5,117,691	5,036,898
Impaired Financing Receivable, Recorded Investment	20,594	22,287
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	63,024	67,889
Impaired Financing Receivable, Related Allowance	$ 1,253	$ 1,557

Loans And Allowance For Loan 40

Loans And Allowance For Loan Losses (Investment In Impaired Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Abstract]
Non-accrual loans	$ 15,645	$ 26,575
Restructured loans (accruing)	49,475	38,739
Total impaired loans	$ 65,120	$ 65,314

Loans And Allowance For Loan 41

Loans And Allowance For Loan Losses (Additional Information About Impaired Loans Held) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 8,281	$ 17,457
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	11,612	27,370
Impaired Financing Receivable, with Related Allowance, Recorded Investment	56,839	47,857
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	62,932	56,768
Impaired Financing Receivable, Related Allowance	3,069	3,484
Impaired Financing Receivable, Recorded Investment	65,120	65,314
Impaired Financing Receivable, Unpaid Principal Balance	74,544	84,138
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	7,053	9,330
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	10,018	11,777
Impaired Financing Receivable, with Related Allowance, Recorded Investment	28,369	18,227
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	30,171	20,031
Impaired Financing Receivable, Related Allowance	1,284	1,119
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,228	2,961
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,594	8,956
Impaired Financing Receivable, with Related Allowance, Recorded Investment	214	1,227
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	219	2,804
Impaired Financing Receivable, Related Allowance	18	63
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	4,793
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	6,264
Impaired Financing Receivable, with Related Allowance, Recorded Investment	7,662	6,489
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	9,077	9,008
Impaired Financing Receivable, Related Allowance	514	745
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	373
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	373
Impaired Financing Receivable, with Related Allowance, Recorded Investment	6,703	7,667
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	9,564	10,530
Impaired Financing Receivable, Related Allowance	602	831
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,537	5,599
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,537	5,599
Impaired Financing Receivable, Related Allowance	66	63
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	636	704
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	646	852
Impaired Financing Receivable, Related Allowance	18	67
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	7,718	7,944
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	7,718	7,944
Impaired Financing Receivable, Related Allowance	$ 567	$ 596

Loans And Allowance For Loan 42

Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 19,034	$ 26,298	$ 23,723	$ 31,575
Restructured loans (accruing)	48,454	31,620	46,476	35,466
Total	67,488	57,918	70,199	67,041
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	15,106	21,119	19,387	25,784
Restructured loans (accruing)	31,372	13,399	29,117	16,612
Total	46,478	34,518	48,504	42,396
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	3,928	5,179	4,336	5,791
Restructured loans (accruing)	17,082	18,221	17,359	18,854
Total	$ 21,010	$ 23,400	$ 21,695	$ 24,645

Loans And Allowance For Loan 43

Loans And Allowance For Loan Losses (Interest Income Recognized on Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 630	$ 444	$ 1,892	$ 1,331
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	277	63	830	188
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	2	22	7	66
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	42	33	126	99
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	39	47	118	142
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	89	87	267	261
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	7	6	22	17
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 174	$ 186	$ 522	$ 558

Loans And Allowance For Loan 44

Loans And Allowance For Loan Losses (Aging Information On Past Due And Accruing Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	$ 13,148,745	$ 12,344,207
30 - 89 Days Past Due	48,935	49,443
90 Days Past Due and Still Accruing	16,916	16,467
Non-accrual loans	15,645	26,575
Total	13,230,241	12,436,692
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	4,770,883	4,397,893
Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	4,758,519	4,384,149
30 - 89 Days Past Due	3,100	2,306
90 Days Past Due and Still Accruing	506	564
Non-accrual loans	8,758	10,874
Total	4,770,883	4,397,893
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	800,545	624,070
Real Estate - Construction And Land [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	794,731	617,838
30 - 89 Days Past Due	2,357	3,142
90 Days Past Due and Still Accruing	2,147	0
Non-accrual loans	1,310	3,090
Total	800,545	624,070
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	2,520,528	2,355,544
Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	2,513,270	2,340,919
30 - 89 Days Past Due	5,011	6,762
90 Days Past Due and Still Accruing	327	0
Non-accrual loans	1,920	7,863
Total	2,520,528	2,355,544
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	1,968,005	1,915,953
Real Estate - Personal [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	1,954,889	1,901,330
30 - 89 Days Past Due	6,901	7,117
90 Days Past Due and Still Accruing	2,581	3,081
Non-accrual loans	3,634	4,425
Total	1,968,005	1,915,953
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	1,972,969	1,924,365
Consumer [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	1,951,011	1,903,389
30 - 89 Days Past Due	19,510	18,273
90 Days Past Due and Still Accruing	2,448	2,703
Non-accrual loans	0	0
Total	1,972,969	1,924,365
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	417,591	432,981
Revolving Home Equity [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	414,251	427,998
30 - 89 Days Past Due	2,246	2,641
90 Days Past Due and Still Accruing	1,071	2,019
Non-accrual loans	23	323
Total	417,591	432,981
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	760,022	779,744
Consumer Credit Card [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	742,820	762,750
30 - 89 Days Past Due	9,366	8,894
90 Days Past Due and Still Accruing	7,836	8,100
Non-accrual loans	0	0
Total	760,022	779,744
Overdrafts [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	19,698	6,142
Overdrafts [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	19,254	5,834
30 - 89 Days Past Due	444	308
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	0	0
Total	$ 19,698	$ 6,142

Loans And Allowance For Loan 45

Loans And Allowance For Loan Losses (Credit Quality Of Commercial Loan Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Line Items]
Loans	$ 13,230,241	$ 12,436,692
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	4,770,883	4,397,893
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	800,545	624,070
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	2,520,528	2,355,544
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	8,091,956	7,377,507
Commercial Portfolio Segment [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	7,844,670	7,179,210
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	123,246	65,344
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	112,052	111,126
Commercial Portfolio Segment [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	11,988	21,827
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	4,770,883	4,397,893
Commercial Portfolio Segment [Member] | Business [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	4,625,175	4,278,857
Commercial Portfolio Segment [Member] | Business [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	76,105	49,302
Commercial Portfolio Segment [Member] | Business [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	60,845	58,860
Commercial Portfolio Segment [Member] | Business [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	8,758	10,874
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	800,545	624,070
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	798,168	618,788
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	860	1,033
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	207	1,159
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	1,310	3,090
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	2,520,528	2,355,544
Commercial Portfolio Segment [Member] | Real Estate - Business [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	2,421,327	2,281,565
Commercial Portfolio Segment [Member] | Real Estate - Business [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	46,281	15,009
Commercial Portfolio Segment [Member] | Real Estate - Business [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	51,000	51,107
Commercial Portfolio Segment [Member] | Real Estate - Business [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	$ 1,920	$ 7,863

Loans And Allowance For Loan 46

Loans And Allowance For Loan Losses (Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding ) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Loans And Allowance For Loan Losses [Line Items]
Credit Quality Personal Real Estate Loans Excluded	$ 251.7	$ 257.8
Credit quality personal banking loan table percentage loans excluded	4.90%
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Real Estate - Personal [Member] | Fico Under Six Hundred [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	1.40%	1.50%
Real Estate - Personal [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.00%	3.00%
Real Estate - Personal [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	10.30%	9.10%
Real Estate - Personal [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	24.80%	25.00%
Real Estate - Personal [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	60.50%	61.40%
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer [Member] | Fico Under Six Hundred [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.20%	4.50%
Consumer [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	8.50%	9.70%
Consumer [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	21.00%	21.80%
Consumer [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	26.50%	26.40%
Consumer [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	39.80%	37.60%
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Revolving Home Equity [Member] | Fico Under Six Hundred [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	1.20%	1.50%
Revolving Home Equity [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.80%	3.90%
Revolving Home Equity [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	13.20%	13.60%
Revolving Home Equity [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	28.10%	28.40%
Revolving Home Equity [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	53.70%	52.60%
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer Credit Card [Member] | Fico Under Six Hundred [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.00%	3.90%
Consumer Credit Card [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.90%	12.00%
Consumer Credit Card [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	31.40%	31.70%
Consumer Credit Card [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	28.40%	27.90%
Consumer Credit Card [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	24.30%	24.50%

Loans And Allowance For Loan 47

Loans And Allowance For Loan Losses (Outstanding Balance Of Loans Classified As Troubled Debt Restructurings) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	$ 59,031
Balance 90 days past due at any time during previous 12 months	2,451
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	34,227
Balance 90 days past due at any time during previous 12 months	0
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	784
Balance 90 days past due at any time during previous 12 months	676
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	5,742
Balance 90 days past due at any time during previous 12 months	751
Personal Banking Portfolio Segment [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	4,387
Balance 90 days past due at any time during previous 12 months	358
Personal Banking Portfolio Segment [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	5,560
Balance 90 days past due at any time during previous 12 months	62
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	613
Balance 90 days past due at any time during previous 12 months	67
Personal Banking Portfolio Segment [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	7,718
Balance 90 days past due at any time during previous 12 months	$ 537

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)Securities	Dec. 31, 2015USD ($)Securities	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Investment [Line Items]
Non-marketable FHLB and FRB stock held for debt and regulatory purposes	$ 46,900	$ 46,800
Non-marketable private equity investments held	61,000	65,600
U.S. Treasury inflation-protected securities held, at fair value	$ 437,900
Percentage decrease requiring a review for impairment	20.00%
Fair value of securities on other-than-temporary impairment watch list	$ 103,700	95,800
Credit-related portion of impairments included in earnings, for securities on watch list	$ 14,228	$ 14,129	$ 14,144	$ 13,734
Number of individual securities held in the available for sale portfolio | Securities	2,000
Securities in Unrealized Loss Positions, Number of Positions | Securities	152	466
Fair value of securities in an unrealized loss position	$ 955,010	$ 5,120,187
AFS securities in loss position at period-end, change in unrealized loss	(41,700)
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 10,954	52,620
Minimum period that OTTI securities have been in a loss position	12 months
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 469,123	767,349
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Percent of Portfolio	5.00%
Securities pledged as collateral	$ 4,000,000
Securities pledged as collateral and may be sold or re-pledged	$ 578,100
Number of investments in a single issuer that exceed 10% of stockholder's equity	0
No investment in a single issuer exceeds this percentage of stockholder's equity	10.00%
State And Municipal Obligations [Member]
Investment [Line Items]
Fair value of securities in an unrealized loss position	$ 42,611	98,118
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	616	1,739
Auction Rate Securities Available For Sale	378
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	16,276	31,120
Available-for-sale Securities, Excluding Auction Rate Securities	$ 1,800,000
State and municipal obligation portfolio, excluding auction rate securities, as a percentage of total available for sale securities	19.50%
Equity Securities [Member]
Investment [Line Items]
Common stock held by the holding company	$ 46,900
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Fair value of securities on other-than-temporary impairment watch list	34,600
Credit-related portion of impairments included in earnings, for securities on watch list	14,200
Fair value of securities in an unrealized loss position	100,353	708,139
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	239	7,819
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 39,070	$ 54,536

Investment Securities (Investme

Investment Securities (Investment Securities, At Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment Securities [Abstract]
Available for sale securities	$ 9,438,871	$ 9,777,004
Trading securities	28,586	11,890
Non-marketable	108,224	112,786
Total investment securities	$ 9,575,681	$ 9,901,680

Investment Securities (Summary

Investment Securities (Summary Of Available For Sale Investment Securities By Maturity Groupings) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Amortized Cost	$ 9,212,096	$ 9,691,414
Fair Value	9,438,871	9,777,004
U.S. Government And Federal Agency Obligations [Member]
Investment [Line Items]
Amortized Cost	738,658	729,846
Fair Value	755,649	727,076
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	59,068
Fair Value	60,028
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	500,823
Fair Value	514,620
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	106,427
Fair Value	110,802
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	72,340
Fair Value	70,199
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Amortized Cost	445,648	794,912
Fair Value	451,242	793,023
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	11,589
Fair Value	11,627
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	419,071
Fair Value	424,410
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	14,988
Fair Value	15,205
State And Municipal Obligations [Member]
Investment [Line Items]
Amortized Cost	1,776,857	1,706,635
Fair Value	1,836,001	1,741,957
State And Municipal Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	153,968
Fair Value	155,078
State And Municipal Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	626,147
Fair Value	641,498
State And Municipal Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	941,494
Fair Value	983,236
State And Municipal Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	55,248
Fair Value	56,189
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,590,902	2,579,031
Fair Value	2,663,677	2,618,281
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	922,302	879,186
Fair Value	937,208	879,963
Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,403,019	2,660,201
Fair Value	2,409,324	2,644,381
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	5,916,223	6,118,418
Fair Value	6,010,209	6,142,625
Other Debt Securities [Member]
Investment [Line Items]
Amortized Cost	329,032	335,925
Fair Value	338,812	331,320
Other Debt Securities [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	5,997
Fair Value	6,025
Other Debt Securities [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	97,136
Fair Value	98,939
Other Debt Securities [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	214,311
Fair Value	222,376
Other Debt Securities [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	11,588
Fair Value	11,472
Equity Securities [Member]
Investment [Line Items]
Amortized Cost	5,678	5,678
Fair Value	$ 46,958	$ 41,003

Investment Securities (Availabl

Investment Securities (Available For Sale Securities Unrealized Gains And Losses, By Security Type) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Amortized Cost	$ 9,212,096	$ 9,691,414
Gross unreailzed gain in accumulated other comprehensive income at period end	237,729	138,210
Gross unreailzed losses in accumulated other comprehensive income at period end	(10,954)	(52,620)
Fair Value	9,438,871	9,777,004
U.S. Government And Federal Agency Obligations [Member]
Investment [Line Items]
Amortized Cost	738,658	729,846
Gross unreailzed gain in accumulated other comprehensive income at period end	19,132	5,051
Gross unreailzed losses in accumulated other comprehensive income at period end	(2,141)	(7,821)
Fair Value	755,649	727,076
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Amortized Cost	445,648	794,912
Gross unreailzed gain in accumulated other comprehensive income at period end	5,637	2,657
Gross unreailzed losses in accumulated other comprehensive income at period end	(43)	(4,546)
Fair Value	451,242	793,023
State And Municipal Obligations [Member]
Investment [Line Items]
Amortized Cost	1,776,857	1,706,635
Gross unreailzed gain in accumulated other comprehensive income at period end	59,760	37,061
Gross unreailzed losses in accumulated other comprehensive income at period end	(616)	(1,739)
Fair Value	1,836,001	1,741,957
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,590,902	2,579,031
Gross unreailzed gain in accumulated other comprehensive income at period end	72,803	47,856
Gross unreailzed losses in accumulated other comprehensive income at period end	(28)	(8,606)
Fair Value	2,663,677	2,618,281
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	922,302	879,186
Gross unreailzed gain in accumulated other comprehensive income at period end	15,145	8,596
Gross unreailzed losses in accumulated other comprehensive income at period end	(239)	(7,819)
Fair Value	937,208	879,963
Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,403,019	2,660,201
Gross unreailzed gain in accumulated other comprehensive income at period end	14,026	1,287
Gross unreailzed losses in accumulated other comprehensive income at period end	(7,721)	(17,107)
Fair Value	2,409,324	2,644,381
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	5,916,223	6,118,418
Gross unreailzed gain in accumulated other comprehensive income at period end	101,974	57,739
Gross unreailzed losses in accumulated other comprehensive income at period end	(7,988)	(33,532)
Fair Value	6,010,209	6,142,625
Other Debt Securities [Member]
Investment [Line Items]
Amortized Cost	329,032	335,925
Gross unreailzed gain in accumulated other comprehensive income at period end	9,946	377
Gross unreailzed losses in accumulated other comprehensive income at period end	(166)	(4,982)
Fair Value	338,812	331,320
Equity Securities [Member]
Investment [Line Items]
Amortized Cost	5,678	5,678
Gross unreailzed gain in accumulated other comprehensive income at period end	41,280	35,325
Gross unreailzed losses in accumulated other comprehensive income at period end	0	0
Fair Value	$ 46,958	$ 41,003

Investment Securities (Cash Flo

Investment Securities (Cash Flow Model Inputs Used To Calculate Credit Losses) (Details)	Sep. 30, 2016
Minimum [Member]
Investment [Line Items]
Prepayment CPR	0.00%
Projected cumulative default	18.00%
Credit support	0.00%
Loss severity	17.00%
Maximum [Member]
Investment [Line Items]
Prepayment CPR	25.00%
Projected cumulative default	51.00%
Credit support	30.00%
Loss severity	63.00%

Investment Securities (Changes

Investment Securities (Changes In Recorded Credit Losses) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 14,228	$ 14,144	$ 14,129	$ 13,734
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	0	76
Credit losses on debt securities for which impairment was previously recognized	270	407
Increase in expected cash flows that are recognized over remaining life of security	$ (171)	$ (73)

Investment Securities (Securiti

Investment Securities (Securities With Unrealized Losses And Length Of Impairment Period) (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Less than 12 months, Fair Value	$ 485,887,000	$ 4,352,838,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,027,000	31,844,000
12 months or longer, Fair Value	469,123,000	767,349,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8,927,000	20,776,000
Total, Fair Value	955,010,000	5,120,187,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	10,954,000	52,620,000
U.S. Government And Federal Agency Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	36,586,000	491,998,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	61,000	3,098,000
12 months or longer, Fair Value	33,613,000	31,012,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2,080,000	4,723,000
Total, Fair Value	70,199,000	523,010,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,141,000	7,821,000
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	49,901,000	157,830,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	43,000	1,975,000
12 months or longer, Fair Value	0	110,250,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	2,571,000
Total, Fair Value	49,901,000	268,080,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	43,000	4,546,000
State And Municipal Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	26,335,000	66,998,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	227,000	544,000
12 months or longer, Fair Value	16,276,000	31,120,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	389,000	1,195,000
Total, Fair Value	42,611,000	98,118,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	616,000	1,739,000
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	24,564,000	530,035,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	23,000	2,989,000
12 months or longer, Fair Value	2,304,000	291,902,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	5,000	5,617,000
Total, Fair Value	26,868,000	821,937,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	28,000	8,606,000
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	61,283,000	653,603,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	127,000	7,059,000
12 months or longer, Fair Value	39,070,000	54,536,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	112,000	760,000
Total, Fair Value	100,353,000	708,139,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	239,000	7,819,000
Asset-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	279,282,000	2,207,922,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,510,000	12,492,000
12 months or longer, Fair Value	365,402,000	223,311,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	6,211,000	4,615,000
Total, Fair Value	644,684,000	2,431,233,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	7,721,000	17,107,000
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	365,129,000	3,391,560,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,660,000	22,540,000
12 months or longer, Fair Value	406,776,000	569,749,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	6,328,000	10,992,000
Total, Fair Value	771,905,000	3,961,309,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	7,988,000	33,532,000
Debt Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	7,936,000	244,452,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	36,000	3,687,000
12 months or longer, Fair Value	12,458,000	25,218,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	130,000	1,295,000
Total, Fair Value	20,394,000	269,670,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 166,000	$ 4,982,000

Investment Securities (Proceeds

Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Investment [Line Items]
Proceeds from sales of available for sale securities				$ 0		$ 675,870
Proceeds from sales of non-marketable securities				7,946		9,023
Total proceeds	[1]			7,946		684,893
Investment securities gains (losses), net		$ (1,965)	$ (378)	(3,704)	[1]	7,800	[1]
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale Securities, gross realized gains on sales				0		2,813
Other-than-temporary impairment recognized on debt securities				(270)		(483)
Non-Marketable [Member]
Investment [Line Items]
Gains realized on sales				3,717		2,516
Nonmarketable Securities Loss On Sale				(502)		0
Fair value adjustments, net				$ (6,649)		$ 2,954
[1]	Available for sale and non-marketable securities

Goodwill And Other Intangible56

Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 374	$ 445	$ 1,200	$ 1,400

Goodwill And Other Intangible57

Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Estimable Useful Lives) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,530	$ 35,908
Accumulated Amortization	(29,873)	(29,210)
Valuation Allowance	(36)	(29)
Net Amount	6,621	6,669
Core Deposit Premium [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,270	31,270
Accumulated Amortization	(27,182)	(26,239)
Valuation Allowance	0	0
Net Amount	4,088	5,031
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,260	4,638
Accumulated Amortization	(2,691)	(2,971)
Valuation Allowance	(36)	(29)
Net Amount	$ 2,533	$ 1,638

Goodwill And Other Intangible58

Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,016	$ 1,584
2,017	1,210
2,018	931
2,019	770
2,020	$ 630

Goodwill And Other Intangible59

Goodwill And Other Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill And Net Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Goodwill and Intangible Assets [Roll Forward]
Amortization	$ (374)	$ (445)	$ (1,200)	$ (1,400)
Goodwill [Member]
Goodwill and Intangible Assets [Roll Forward]
Originations			0
Amortization			0
Impairment reversal			0
Intangible Assets, Net (Including Goodwill)	138,921		138,921		$ 138,921
Core Deposit Premium [Member]
Goodwill and Intangible Assets [Roll Forward]
Originations			0
Amortization			(943)
Impairment reversal			0
Intangible Assets, Net (Including Goodwill)	4,088		4,088		5,031
Mortgage Servicing Rights [Member]
Goodwill and Intangible Assets [Roll Forward]
Originations			1,127
Amortization			(225)
Impairment reversal			(7)
Intangible Assets, Net (Including Goodwill)	$ 2,533		$ 2,533		$ 1,638

Goodwill And Other Intangible60

Goodwill And Other Intangible Assets (Schedule Of Goodwill Allocated By Operating Segments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 138,921	$ 138,921
Consumer Segment [Member]
Goodwill [Line Items]
Goodwill	70,721	70,721
Commercial Segment [Member]
Goodwill [Line Items]
Goodwill	67,454	67,454
Wealth Segment [Member]
Goodwill [Line Items]
Goodwill	$ 746	$ 746

Guarantees (Details)

Guarantees (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Guarantor Obligations [Line Items]
Derivative Liabilities	$ 31,772	$ 12,729
Notional amount of underlying interest rate swaps associated with risk participation agreements	1,498,856	$ 1,184,666
Financial Standby Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Standby letters of credit, net liability	2,400
Contractual amount of letters of credit, guaranteed maximum potential future payments	352,100
Risk Participation Agreement [Member] | Indirect Guarantee Of Indebtedness [Member]
Guarantor Obligations [Line Items]
Derivative Liabilities	272
Notional amount of underlying interest rate swaps associated with risk participation agreements	$ 60,200
Minimum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years	3 years
Maximum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years	11 years

Pension Pension (Narrative) (De

Pension Pension (Narrative) (Details)	9 Months Ended
	Sep. 30, 2016USD ($)
Pension (Narrative) [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$ 0
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0

Pension (Net Pension Cost) (Det

Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pension [Abstract]
Service cost - benefits earned during the period	$ 135	$ 127	$ 406	$ 379
Interest cost on projected benefit obligation	986	1,139	2,958	3,571
Expected Return on Plan Assets	(1,437)	(1,523)	(4,313)	(4,569)
Amortization of Prior Service Cost	(68)	(203)	(203)	(203)
Amortization of unrecognized net loss	647	660	1,940	1,969
Net periodic pension cost	$ 263	$ 200	$ 788	$ 1,147

Pension Pension (Change in Acco

Pension Pension (Change in Accounting Estimate) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Change in Accounting Estimate [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	$ 263	$ 200	$ 788	$ 1,147
Change in Assumptions for Pension Plans [Member]
Change in Accounting Estimate [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost			$ (851)

Common Stock (Summary Of Compon

Common Stock (Summary Of Components Used To Calculate Basic And Diluted Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Commerce Bancshares, Inc.	$ 68,545	$ 64,612	$ 203,812	$ 200,020
Preferred Stock Dividends	2,250	2,250	6,750	6,750
Net Income (Loss) Available to Common Stockholders	$ 66,295	$ 62,362	$ 197,062	$ 193,270
Basic income per common share	$ 0.69	$ 0.63	$ 2.04	$ 1.93
Diluted income per common share	$ 0.68	$ 0.63	$ 2.03	$ 1.93
Basic Income Per Common Share [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Available to Common Stockholders	$ 66,295	$ 62,362	$ 197,062	$ 193,270
Less income allocated to nonvested restricted stockholders	913	884	2,747	2,677
Net income available to common stockholders	$ 65,382	$ 61,478	$ 194,315	$ 190,593
Weighted average common shares outstanding	95,426	96,589	95,458	98,568
Basic income per common share	$ 0.69	$ 0.63	$ 2.04	$ 1.93
Diluted Income Per Common Share [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Available to Common Stockholders, Diluted	$ 66,295	$ 62,362	$ 197,062	$ 193,270
Less income allocated to nonvested restricted stockholders	912	883	2,743	2,672
Net income available to common stockholders	$ 65,383	$ 61,479	$ 194,319	$ 190,598
Weighted average common shares outstanding	95,426	96,589	95,458	98,568
Net effect of the assumed exercise of stock-based awards - based on the treasury stock method using the average market price for the respective periods	243	293	236	315
Weighted average diluted common shares outstanding	95,669	96,882	95,694	98,883
Diluted income per common share	$ 0.68	$ 0.63	$ 2.03	$ 1.93

Common Stock Common Stock (Anti

Common Stock Common Stock (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	84	395

Common Stock Common Stock (Pref

Common Stock Common Stock (Preferred Stock Issuance) (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Common Stock (Preferred Stock) [Abstract]
Depositary shares issued	6,000,000
Preferred stock, shares issued	6,000	6,000
Preferred stock, par value	$ 1	$ 1
Preferred Stock, Liquidation Preference, Value	$ 150
Preferred Stock, Liquidation Preference Per Share	$ 25

Accumulated Other Comprehensi68

Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Accumulated other comprehensive income		$ 121,082	$ 65,636	$ 121,082	$ 65,636	$ 32,470	$ 62,093
Other Comprehensive Income Before Reclassifications				140,915	6,279
Reclassified from Accumulated Oher Comprehensive Income				2,007	(564)
Other Comprehensive Income (Loss), before Tax				142,922	5,715
Other Comprehensive Income (Loss), Tax				(54,310)	(2,172)
Other comprehensive income (loss), net of tax		(13,342)	16,847	88,612	3,543
Reclassification Where Impairment Was Not Previously Recognized				0	0
Unrealized Gain Loss on Securities OTTI [Member]
Accumulated other comprehensive income	[1]	2,964	3,528	2,964	3,528	3,316	3,791
Other Comprehensive Income Before Reclassifications	[1]			(837)	(976)
Reclassified from Accumulated Oher Comprehensive Income	[1]			270	483
Other Comprehensive Income (Loss), before Tax	[1]			(567)	(493)
Other Comprehensive Income (Loss), Tax	[1]			215	187
Other comprehensive income (loss), net of tax	[1]			(352)	(306)
Reclassification Where Impairment Was Not Previously Recognized	[1]			0	43
Unrealized Gain Loss on Securities Other [Member]
Accumulated other comprehensive income	[1]	137,637	84,021	137,637	84,021	49,750	81,310
Other Comprehensive Income Before Reclassifications	[1]			141,752	7,255
Reclassified from Accumulated Oher Comprehensive Income	[1]			0	(2,813)
Other Comprehensive Income (Loss), before Tax	[1]			141,752	4,442
Other Comprehensive Income (Loss), Tax	[1]			(53,865)	(1,688)
Other comprehensive income (loss), net of tax	[1]			87,887	2,754
Reclassification Where Impairment Was Not Previously Recognized	[1]			0	(43)
Pension Loss [Member]
Accumulated other comprehensive income	[2]	$ (19,519)	$ (21,913)	(19,519)	(21,913)	$ (20,596)	$ (23,008)
Other Comprehensive Income Before Reclassifications	[2]			0	0
Reclassified from Accumulated Oher Comprehensive Income	[2]			1,737	1,766
Other Comprehensive Income (Loss), before Tax	[2]			1,737	1,766
Other Comprehensive Income (Loss), Tax	[2]			(660)	(671)
Other comprehensive income (loss), net of tax	[2]			1,077	1,095
Reclassification Where Impairment Was Not Previously Recognized	[2]			$ 0	$ 0
[1]	The pre-tax amounts reclassified from accumulated other comprehensive income are included in "investment securities gains (losses), net" in the consolidated statements of income.
[2]	The pre-tax amounts reclassified from accumulated other comprehensive income are included in the computation of net periodic pension cost as "amortization of prior service cost" and "amortization of unrecognized net loss" (see Note 6), for inclusion in the consolidated statements of income.

Segments (Schedule Of Financial

Segments (Schedule Of Financial Information By Segment) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)		Sep. 30, 2015USD ($)
Segment Reporting Information [Line Items]
Segment Reporting Information, Intersegment Revenue	$ 0	$ 0	$ 0		$ 0
Number of operating segments			3		3
Net interest income	171,243,000	162,038,000	$ 506,847,000		$ 471,833,000
Provision for loan losses	(7,263,000)	(8,364,000)	(25,918,000)		(19,541,000)
Non-interest income	119,319,000	111,288,000	354,913,000		332,097,000
Investment securities gains (losses), net	(1,965,000)	(378,000)	(3,704,000)	[1]	7,800,000	[1]
Non-interest expense	(181,242,000)	(171,402,000)	(535,804,000)		(500,710,000)
Income before income taxes	100,092,000	93,182,000	296,334,000		291,479,000
Consumer Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	67,375,000	67,085,000	201,166,000		199,265,000
Provision for loan losses	(9,033,000)	(8,605,000)	(26,533,000)		(25,500,000)
Non-interest income	34,229,000	31,099,000	97,165,000		87,462,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(70,113,000)	(69,158,000)	(209,649,000)		(203,440,000)
Income before income taxes	22,458,000	20,421,000	62,149,000		57,787,000
Commercial Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	78,537,000	74,476,000	231,552,000		218,699,000
Provision for loan losses	2,432,000	166,000	3,919,000		842,000
Non-interest income	49,832,000	47,486,000	149,240,000		144,685,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(71,425,000)	(68,713,000)	(211,961,000)		(199,097,000)
Income before income taxes	59,376,000	53,415,000	172,750,000		165,129,000
Wealth Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	10,782,000	10,427,000	32,604,000		31,921,000
Provision for loan losses	(5,000)	106,000	(120,000)		114,000
Non-interest income	36,675,000	33,980,000	107,696,000		102,517,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(28,185,000)	(27,182,000)	(85,025,000)		(81,432,000)
Income before income taxes	19,267,000	17,331,000	55,155,000		53,120,000
Segment Totals [Member]
Segment Reporting Information [Line Items]
Net interest income	156,694,000	151,988,000	465,322,000		449,885,000
Provision for loan losses	(6,606,000)	(8,333,000)	(22,734,000)		(24,544,000)
Non-interest income	120,736,000	112,565,000	354,101,000		334,664,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(169,723,000)	(165,053,000)	(506,635,000)		(483,969,000)
Income before income taxes	101,101,000	91,167,000	290,054,000		276,036,000
Other Elimination [Member]
Segment Reporting Information [Line Items]
Net interest income	14,549,000	10,050,000	41,525,000		21,948,000
Provision for loan losses	(657,000)	(31,000)	(3,184,000)		5,003,000
Non-interest income	(1,417,000)	(1,277,000)	812,000		(2,567,000)
Investment securities gains (losses), net	(1,965,000)	(378,000)	(3,704,000)		7,800,000
Non-interest expense	(11,519,000)	(6,349,000)	(29,169,000)		(16,741,000)
Income before income taxes	$ (1,009,000)	$ 2,015,000	$ 6,280,000		$ 15,443,000
[1]	Available for sale and non-marketable securities

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) $ in Millions	Sep. 30, 2016USD ($)
Real Estate [Member]
Derivative [Line Items]
Derivative loss from industry concentration	$ 15.7
Retirement communities [Member]
Derivative [Line Items]
Derivative loss from industry concentration	3.5
Distribution [Member]
Derivative [Line Items]
Derivative loss from industry concentration	3.4
Swaps with Central Clearing Agency and Dealer Counterparties [Member]
Derivative [Line Items]
Swap Net Liability Position Fair Value	31.3
Investment Securities [Member] | Swaps with Central Clearing Agency and Dealer Counterparties [Member]
Derivative [Line Items]
Value Of Collateral Posted	5.1
Cash [Member] | Swaps with Central Clearing Agency and Dealer Counterparties [Member]
Derivative [Line Items]
Value Of Collateral Posted	$ 36.8

Derivative Instruments (Schedul

Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional Amount of Derivatives	$ 1,498,856	$ 1,184,666
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	1,320,674	1,020,310
Interest Rate Caps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	60,954	66,118
Credit Risk Participation Agreements [Member]
Derivative [Line Items]
Notional Amount of Derivatives	63,117	62,456
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	3,792	15,535
Mortgage Loan Commitments [Member]
Derivative [Line Items]
Notional Amount of Derivatives	24,301	8,605
Mortgage Loan Forward Sale Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	518	642
Forward TBA Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	$ 25,500	$ 11,000

Derivative Instruments (Sched72

Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Other assets	$ 32,056	$ 12,771
Other liabilities	(31,772)	(12,729)
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	31,135	11,993
Other liabilities	(31,343)	(11,993)
Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	36	73
Other liabilities	(36)	(73)
Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	1
Other liabilities	(272)	(195)
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	5	437
Other liabilities	(10)	(430)
Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	876	263
Other liabilities	0	0
Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	0
Other liabilities	0	0
Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	2	4
Other liabilities	$ (111)	$ (38)

Derivative Instruments (Summary

Derivative Instruments (Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ 148	$ 359	$ 2,894	$ 4,270
Other Non-Interest Income [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	203	741	3,198	3,551
Other Non-Interest Income [Member] | Credit Risk Participation Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	50	(57)	(8)	(9)
Other Non-Interest Income [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(20)	(55)	(12)	267
Loans Fees And Sales [Member] | Mortgage Loan Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	86	106	613	451
Loans Fees And Sales [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	1	(6)	1	(5)
Loans Fees And Sales [Member] | Forward TBA Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ (172)	$ (370)	$ (898)	$ 15

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivative Asset, Amount Offset by Liabiilty	$ 0	$ 0
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	32,056	12,771
Derivative Assets	32,056	12,771
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	31,772	12,729
Derivative Liabilities	31,772	12,729
Derivative Subject to Master Netting Agreement [Member]
Derivative Asset, Fair Value, Gross Asset	31,174	12,071
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Asset, Net Amount Presented in the Balance Sheet	31,174	12,071
Derivative Asset, Not Offset, Policy Election Deduction	(38)	(94)
derivatve asset, fair value of collateral	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	31,136	11,977
Derivative Liability, Fair Value, Gross Liability	31,762	12,299
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Net Amount Presented in the Balance Sheet	31,762	12,299
Derivative Liability, Not Offset, Policy Election Deduction	(38)	(94)
Derivative Liability, Fair Value of Collateral	(30,319)	(10,927)
Derivative Liability, Fair Value, Amount Offset Against Collateral	1,405	1,278
Derivative Not Subject to Master Netting Agreement [Member]
Derivative Asset, Fair Value, Gross Asset	882	700
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Asset, Not Subject to Master Netting Arrangement	882	700
Derivative Liability, Fair Value, Gross Liability	10	430
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Not Subject to Master Netting Arrangement	$ 10	$ 430

Resale and Repurchase Agreeme75

Resale and Repurchase Agreements Resale and Repurchase Agreements (Narrative) (Details) - Collateral Swap [Member] - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Balance Sheet Offsetting [Line Items]
Collateral Swap Agreements	$ 550	$ 550
Collateral Already Posted, Aggregate Fair Value	572.9
Collateral Accepted, Aggregate Fair Value	$ 564.7

Resale and Repurchase Agreeme76

Resale and Repurchase Agreements Resale and Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Balance Sheet Offsetting [Line Items]
Securities purchased under agreements to resell	$ 725,000	$ 875,000
Resale agreement [Member]
Balance Sheet Offsetting [Line Items]
Securities Purchased under Agreements to Resell, Gross	1,275,000	1,425,000
Securities Purchased under Agreements to Resell, Liability	(550,000)	(550,000)
Securities purchased under agreements to resell	725,000	875,000
Securities Purchased under Agreements to Resell, Not Subject to Master Netting Arrangement	0	0
Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities	(725,000)	(875,000)
Securities Purchased under Agreements to Resell, Amount Offset Against Collateral	0	0
Repurchase agreement [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	1,746,251	1,956,582
Securities Sold under Agreements to Repurchase, Asset	(550,000)	(550,000)
Securities Sold under Agreements to Repurchase	1,196,251	1,406,582
Securities Sold under Agreements to Repurchase, Not Subject to Master Netting Arrangement	0	0
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(1,196,251)	(1,406,582)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	$ 0	$ 0

Resale and Repurchase Agreeme77

Resale and Repurchase Agreements Remaining Contractual Maturities of Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
U.S. Government And Federal Agency Obligations [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 228,435	$ 210,346
U.S. Government And Federal Agency Obligations [Member] | Maturity up to 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
U.S. Government And Federal Agency Obligations [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	300,000	300,000
U.S. Government And Federal Agency Obligations [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	528,435	510,346
Government-Sponsored Enterprise Obligations [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	185,224	356,970
Government-Sponsored Enterprise Obligations [Member] | Maturity up to 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Government-Sponsored Enterprise Obligations [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	2,728	24,096
Government-Sponsored Enterprise Obligations [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	187,952	381,066
Agency Mortgage-Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	367,145	579,974
Agency Mortgage-Backed Securities [Member] | Maturity up to 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	2,908	2,292
Agency Mortgage-Backed Securities [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	252,982	225,904
Agency Mortgage-Backed Securities [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	623,035	808,170
Asset-Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	306,829	212,000
Asset-Backed Securities [Member] | Maturity up to 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	100,000	45,000
Asset-Backed Securities [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0	0
Asset-Backed Securities [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	406,829	257,000
Repurchase Agreements [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	1,087,633	1,359,290
Repurchase Agreements [Member] | Maturity up to 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	102,908	47,292
Repurchase Agreements [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	555,710	550,000
Repurchase Agreements [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 1,746,251	$ 1,956,582

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 2.6	$ 2.4	$ 8.9	$ 7.7
Nonvested Stock Award [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			4 years
Nonvested Stock Award [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			7 years
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			4 years
Contractual terms of stock options granted (in years)			10 years

Stock-Based Compensation (Summa

Stock-Based Compensation (Summary Of The Status Of Nonvested Share Awards) (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Nonvested Share Awards [Roll Forward]
Nonvested, Shares, Beginning Balance | shares	1,384,417
Granted, Shares | shares	221,222
Vested, Shares | shares	(249,953)
Forfeited, Shares | shares	(28,618)
Nonvested, Shares, Ending Balance | shares	1,327,068
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 34.38
Granted , Weighted Average Grant Date Fair Value | $ / shares	42.17
Vested , Weighted Average Grant Date Fair Value | $ / shares	30.51
Forfeited , Weighted Average Grant Date Fair Value | $ / shares	36.52
Nonvested , Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 36.36

Stock-Based Compensation Stock-

Stock-Based Compensation Stock-Based Compensation (Current Year Per Share Average Fair Value and Valuation Model Assumptions) (Details)	9 Months Ended
	Sep. 30, 2016$ / shares
Current Year Per Share Average Fair Value and Valuation Model Assumptions [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 7.49
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	2.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	21.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years 2 months

Stock-Based Compensation (Sum81

Stock-Based Compensation (Summary Of SAR Activity) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Stock Appreciation Rights [Roll Forward]
Outstanding, Shares, Beginning Balance | shares	1,588,457
Granted, Shares | shares	251,982
Forfeited, Shares | shares	(13,916)
Expired, Shares | shares	(1,375)
Exercised, Shares | shares	(469,903)
Outstanding, Shares, Ending Balance | shares	1,355,245
Outstanding, Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 33.74
Granted, Weighted Average Exercise Price | $ / shares	41.35
Forfeited, Weighted Average Exercise Price | $ / shares	38.06
Expired, Weighted Average Exercise Price | $ / shares	37.19
Exercised, Weighted Average Exercise Price | $ / shares	31.37
Outstanding, Weighted Average Exercise Price, Ending Balance | $ / shares	$ 35.93
Outstanding, Weighted Average Remaining Contractual Term (in years)	5 years 7 months
Outstanding, Aggregate Intrinsic Value, Ending Balance | $	$ 18,068

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Private equity investments	$ 59,486	$ 63,032
Fair Value Hierarchy, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction Rate Securities Available For Sale	16,900
Private equity investments	$ 59,486	$ 63,032

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 4,447,000	$ 4,981,000
U.S. government and federal agency obligations	755,649,000	727,076,000
Government-sponsored enterprise obligations	451,242,000	793,023,000
State and municipal obligations	1,836,001,000	1,741,957,000
Agency mortgage-backed securities	2,663,677,000	2,618,281,000
Non-agency mortgage-backed securities	937,208,000	879,963,000
Other asset-backed securities	2,409,324,000	2,644,381,000
Other debt securities	338,812,000	331,320,000
Equity securities	46,958,000	41,003,000
Trading securities	28,586,000	11,890,000
Private equity investments	59,486,000	63,032,000
Derivative Assets	32,056,000	12,771,000
Assets held in trust for deferred compensation plan	10,028,000	9,278,000
Total Assets	9,573,474,000	9,878,956,000
Derivative Liabilities	31,772,000	12,729,000
Liabilities held in trust for deferred compensation plan	10,028,000	9,278,000
Total Liabilities	41,800,000	22,007,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
U.S. government and federal agency obligations	755,649,000	727,076,000
Government-sponsored enterprise obligations	0	0
State and municipal obligations	0	0
Agency mortgage-backed securities	0	0
Non-agency mortgage-backed securities	0	0
Other asset-backed securities	0	0
Other debt securities	0	0
Equity securities	23,045,000	20,263,000
Trading securities	0	0
Private equity investments	0	0
Derivative Assets	0	0
Assets held in trust for deferred compensation plan	10,028,000	9,278,000
Total Assets	788,722,000	756,617,000
Derivative Liabilities	0	0
Liabilities held in trust for deferred compensation plan	10,028,000	9,278,000
Total Liabilities	10,028,000	9,278,000
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	4,447,000	4,981,000
U.S. government and federal agency obligations	0	0
Government-sponsored enterprise obligations	451,242,000	793,023,000
State and municipal obligations	1,819,093,000	1,724,762,000
Agency mortgage-backed securities	2,663,677,000	2,618,281,000
Non-agency mortgage-backed securities	937,208,000	879,963,000
Other asset-backed securities	2,409,324,000	2,644,381,000
Other debt securities	338,812,000	331,320,000
Equity securities	23,913,000	20,740,000
Trading securities	28,586,000	11,890,000
Private equity investments	0	0
Derivative Assets	31,179,000	12,507,000
Assets held in trust for deferred compensation plan	0	0
Total Assets	8,707,481,000	9,041,848,000
Derivative Liabilities	31,500,000	12,534,000
Liabilities held in trust for deferred compensation plan	0	0
Total Liabilities	31,500,000	12,534,000
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
U.S. government and federal agency obligations	0	0
Government-sponsored enterprise obligations	0	0
State and municipal obligations	16,908,000	17,195,000
Agency mortgage-backed securities	0	0
Non-agency mortgage-backed securities	0	0
Other asset-backed securities	0	0
Other debt securities	0	0
Equity securities	0	0
Trading securities	0	0
Private equity investments	59,486,000	63,032,000
Derivative Assets	877,000	264,000
Assets held in trust for deferred compensation plan	0	0
Total Assets	77,271,000	80,491,000
Derivative Liabilities	272,000	195,000
Liabilities held in trust for deferred compensation plan	0	0
Total Liabilities	$ 272,000	$ 195,000

Fair Value Measurements (Summ84

Fair Value Measurements (Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 80,994	$ 151,836	$ 80,296	$ 152,501
Total gains or losses (realized /unrealized), included in earnings	(2,785)	(1,172)	(6,040)	3,396
Total gains or losses (realized /unrealized), included in other comprehensive income	317	227	819	(127)
Investment securities called	(1,100)	0	(1,200)	(2,000)
Discount accretion	12	22	94	173
Purchase of private equity securities	2,894	9,370	8,735	11,023
Sales And Repayments Of Private Equity Securities	(3,315)	0	(5,713)	(4,800)
Capitalized interest/dividends	15	0	77	117
Sale Of Risk Participation Agreement	(33)	0	(69)	0
Ending balance	76,999	160,283	76,999	160,283
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	(1,995)	(827)	(5,677)	3,396
State And Municipal Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	17,679	92,940	17,195	95,143
Total gains or losses (realized /unrealized), included in earnings	0	0	0	0
Total gains or losses (realized /unrealized), included in other comprehensive income	317	227	819	(127)
Investment securities called	(1,100)	0	(1,200)	(2,000)
Discount accretion	12	22	94	173
Purchase of private equity securities	0	0	0	0
Sales And Repayments Of Private Equity Securities	0	0	0	0
Capitalized interest/dividends	0	0	0	0
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	16,908	93,189	16,908	93,189
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	0	0	0	0
Private Equity Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	62,813	58,726	63,032	57,581
Total gains or losses (realized /unrealized), included in earnings	(2,921)	(1,221)	(6,645)	2,954
Total gains or losses (realized /unrealized), included in other comprehensive income	0	0	0	0
Investment securities called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	2,894	9,370	8,735	11,023
Sales And Repayments Of Private Equity Securities	(3,315)	0	(5,713)	(4,800)
Capitalized interest/dividends	15	0	77	117
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	59,486	66,875	59,486	66,875
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	(2,921)	(1,221)	(6,545)	2,954
Derivative Level Three Unobservable Inputs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	502	170	69	(223)
Total gains or losses (realized /unrealized), included in earnings	136	49	605	442
Total gains or losses (realized /unrealized), included in other comprehensive income	0	0	0	0
Investment securities called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	0	0	0	0
Sales And Repayments Of Private Equity Securities	0	0	0	0
Capitalized interest/dividends	0	0	0	0
Sale Of Risk Participation Agreement	(33)	0	(69)	0
Ending balance	605	219	605	219
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	$ 926	$ 394	$ 868	$ 442

Fair Value Measurements (Summ85

Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ (2,785)	$ (1,172)	$ (6,040)	$ 3,396
Change in unrealized gains or losses relating to assets still held	(1,995)	(827)	(5,677)	3,396
Loans Fees And Sales [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	86	106	613	451
Change in unrealized gains or losses relating to assets still held	876	451	876	451
Other Non-Interest Income [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	50	(57)	(8)	(9)
Change in unrealized gains or losses relating to assets still held	50	(57)	(8)	(9)
Investment Securities Gains (Losses), Net [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	(2,921)	(1,221)	(6,645)	2,954
Change in unrealized gains or losses relating to assets still held	$ (2,921)	$ (1,221)	$ (6,545)	$ 2,954

Fair Value Measurements (Summ86

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details)	9 Months Ended
	Sep. 30, 2016Rate
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Unobservable Input, Estimated market recovery period	5 years
Auction Rate Securities [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable Input, Estimated market rate	2.40%
Auction Rate Securities [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable Input, Estimated market rate	3.30%
Private Equity Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique, Market comparable companies	Market comparable companies
Private Equity Investments [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	4
Private Equity Investments [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	5.5
Mortgage Loan Commitments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Weighted Average, Probability of Funding	76.80%
Weighted Average, Embedded Servicing Value	1.00%
Mortgage Loan Commitments [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Probability of Funding	55.30%
Embedded Servicing Value	0.90%
Mortgage Loan Commitments [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Probability of Funding	97.70%
Embedded Servicing Value	1.00%

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 1,756	$ 6,860
Mortgage servicing rights	2,533	1,461
Foreclosed assets	47	479
Long-lived assets	2,232	937
Fair Value, Inputs, Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	1,756	6,860
Mortgage servicing rights	2,533	1,461
Foreclosed assets	47	479
Long-lived assets	2,232	937
Gain (Loss) on Investments [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans Nonrecurring Basis Gains Losses	(1,626)	(1,794)
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	(7)	59
Foreclosed Assets Nonrecurring Basis Gains Losses	(66)	(193)
Long Lived Assets Nonrecurring Basis Gains Losses	$ (1,001)	$ (1,366)

Fair Value Of Financial Instr88

Fair Value Of Financial Instruments (Schedule Of Estimated Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Personal Real Estate Loans Held for Sale	$ 4,400
Available for sale securities	9,438,871	$ 9,777,004
Trading securities	28,586	11,890
Non-marketable	108,224	112,786
Securities purchased under agreements to resell	725,000	875,000
Cash and due from banks	396,938	464,411
Derivative Assets	32,056	12,771
Assets held in trust for deferred compensation plan	10,028	9,278
Non-interest bearing deposits	7,130,415	7,146,398
Savings, interest checking and money market deposits	11,023,526	10,834,746
Derivative Liabilities	31,772	12,729
Liabilities held in trust for deferred compensation plan	10,028	9,278
Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Derivative Assets	0	0
Assets held in trust for deferred compensation plan	10,028	9,278
Derivative Liabilities	0	0
Liabilities held in trust for deferred compensation plan	10,028	9,278
Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	28,586	11,890
Derivative Assets	31,179	12,507
Assets held in trust for deferred compensation plan	0	0
Derivative Liabilities	31,500	12,534
Liabilities held in trust for deferred compensation plan	0	0
Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Derivative Assets	877	264
Assets held in trust for deferred compensation plan	0	0
Derivative Liabilities	272	195
Liabilities held in trust for deferred compensation plan	0	0
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	778,694	747,339
Federal funds sold	13,415	14,505
Interest earning deposits with banks	56,767	23,803
Cash and due from banks	396,938	464,411
Assets held in trust for deferred compensation plan	10,028	9,278
Non-interest bearing deposits	7,130,415	7,146,398
Savings, interest checking and money market deposits	11,023,526	10,834,746
Federal Funds Purchased	293,640	556,970
Liabilities held in trust for deferred compensation plan	10,028	9,278
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Personal Real Estate Loans Held for Sale	9,511	7,607
Available for sale securities	8,643,269	9,012,470
Trading securities	28,586	11,890
Derivative Assets	31,179	12,507
Derivative Liabilities	31,500	12,534
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	16,908	17,195
Non-marketable	108,224	112,786
Securities purchased under agreements to resell	725,000	875,000
Derivative Assets	877	264
Time open and certificates of deposits	2,012,219	1,997,709
Securities Sold under Agreements to Repurchase	1,196,251	1,406,582
Other borrowings	101,415	103,818
Derivative Liabilities	272	195
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,770,883	4,397,893
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	800,545	624,070
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,520,528	2,355,544
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,968,005	1,915,953
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,972,969	1,924,365
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	417,591	432,981
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Consumer Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	760,022	779,744
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	19,698	6,142
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	778,694	747,339
Federal funds sold	13,415	14,505
Interest earning deposits with banks	56,767	23,803
Cash and due from banks	396,938	464,411
Assets held in trust for deferred compensation plan	10,028	9,278
Non-interest bearing deposits	7,130,415	7,146,398
Savings, interest checking and money market deposits	11,023,526	10,834,746
Federal Funds Purchased	293,640	556,970
Liabilities held in trust for deferred compensation plan	10,028	9,278
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Personal Real Estate Loans Held for Sale	9,511	7,607
Available for sale securities	8,643,269	9,012,470
Trading securities	28,586	11,890
Derivative Assets	31,179	12,507
Derivative Liabilities	31,500	12,534
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	16,908	17,195
Non-marketable	108,224	112,786
Securities purchased under agreements to resell	731,362	879,546
Derivative Assets	877	264
Time open and certificates of deposits	2,009,071	1,993,521
Securities Sold under Agreements to Repurchase	1,196,339	1,406,670
Other borrowings	104,490	108,542
Derivative Liabilities	272	195
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,819,577	4,421,237
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	810,403	633,083
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,561,306	2,387,101
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,998,235	1,940,863
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,972,559	1,916,747
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	419,543	434,607
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Consumer Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	780,059	793,428
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	$ 19,698	$ 6,142