Commerce Bancshares (CBSH) 10-Q 4 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2019	Oct. 30, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	0-2989
Entity Registrant Name	COMMERCE BANCSHARES, INC.
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	43-0889454
Entity Address, Address Line One	1000 Walnut,
Entity Address, City or Town	Kansas City,
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	64106
City Area Code	816
Local Phone Number	234-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		107,314,511
Entity Central Index Key	0000022356
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock [Member] | NASDAQ/NGS (GLOBAL SELECT MARKET) [Member]
Entity Information [Line Items]
Title of 12(b) Security	$5 Par Value Common Stock
Trading Symbol	CBSH
Security Exchange Name	NASDAQ
Preferred Stock [Member] | NASDAQ/NGS (GLOBAL SELECT MARKET) [Member]
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shrs, each representing a 1/1000th intrst in a shr of 6.0% Non-Cum. Perp Pref Stock, Srs B
Trading Symbol	CBSHP
Security Exchange Name	NASDAQ

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Loans	$ 14,462,594	$ 14,140,298
Allowance for loan losses	(160,682)	(159,932)
Net loans	14,301,912	13,980,366
Loans held for sale	20,064	20,694
Investment securities:
Debt Securities, Available-for-sale	8,660,419	8,538,041
Trading	35,918	27,059
Equity securities	4,186	4,409
Other securities	147,211	129,157
Total investment securities	8,847,734	8,698,666
Federal funds sold and short-term securities purchased under agreements to resell	2,850	3,320
Long-term securities purchased under agreements to resell	850,000	700,000
Interest earning deposits with banks	344,129	689,876
Cash and due from banks	512,254	507,892
Premises and equipment, net	365,949	333,119
Goodwill	138,921	138,921
Other intangible assets, net	9,139	8,794
Other assets	483,527	382,194
Total assets	25,876,479	25,463,842
Deposits:
Non-interest bearing	6,816,527	6,980,298
Savings, interest checking and money market	11,424,404	11,685,239
Certificates of deposit of less than $100,000	627,630	586,091
Certificates of deposit of $100,000 and over	1,441,590	1,072,031
Total deposits	20,310,151	20,323,659
Federal funds purchased and securities sold under agreements to repurchase	1,641,274	1,956,389
Other borrowings	257,383	8,702
Other liabilities	561,657	237,943
Total liabilities	22,770,465	22,526,693
Commerce Bancshares, Inc. stockholders' equity:
Preferred stock	144,784	144,784
Common stock	559,432	559,432
Capital surplus	2,042,643	2,084,824
Retained earnings	463,231	241,163
Treasury stock, at cost	(251,663)	(34,236)
Accumulated other comprehensive income (loss)	144,173	(64,669)
Total Commerce Bancshares, Inc. stockholders' equity	3,102,600	2,931,298
Non-controlling interest	3,414	5,851
Total equity	3,106,014	2,937,149
Total liabilities and equity	$ 25,876,479	$ 25,463,842

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Mortgage Loans:
Mortgages Held-for-sale, Fair Value Disclosure	$ 14,393,000	$ 13,529,000
Investment Securities:
Available For Sale Securities Pledged To Secure Structured Repurchase Agreements	$ 205,554,000	$ 463,325,000
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	140,000,000	120,000,000
Common stock, shares issued	111,886,450	111,886,450
Treasury stock, shares	4,314,736	555,100

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INTEREST INCOME
Interest and fees on loans	$ 167,959	$ 159,182	$ 502,100	$ 460,332
Interest and fees on loans held for sale	308	315	1,003	991
Interest on investment securities	58,607	59,792	178,687	178,598
Interest on federal funds sold and short-term securities purchased under agreements to resell	7	69	51	426
Interest on long-term securities purchased under agreements to resell	3,621	3,915	11,066	11,814
Interest on deposits with banks	1,241	1,478	5,113	4,208
Total interest income	231,743	224,751	698,020	656,369
INTEREST EXPENSE
Savings, interest checking and money market	10,225	7,230	30,081	19,338
Certificates of deposit of less than $100,000	1,740	834	4,530	2,190
Certificates of deposit of $100,000 and over	7,540	3,899	20,473	10,221
Interest on federal funds purchased and securities sold under agreements to repurchase	8,273	5,022	23,839	12,979
Interest on other borrowings	453	12	463	36
Total interest expense	28,231	16,997	79,386	44,764
Net interest income	203,512	207,754	618,634	611,605
Provision for loan losses	10,963	9,999	35,232	30,438
Net interest income after provision for loan losses	192,549	197,755	583,402	581,167
NON-INTEREST INCOME
Bank card transaction fees	44,510	42,427	126,800	127,095
Trust fee revenue	39,592	37,400	115,223	110,498
Deposit fee revenue	24,032	23,755	71,009	70,630
Capital market fees	1,787	1,595	5,610	5,878
Consumer brokerage services	4,030	3,884	11,665	11,623
Loan fees and sales	4,755	3,579	12,302	9,670
Other	14,037	11,074	38,633	32,860
Total non-interest income	132,743	123,714	381,242	368,254
INVESTMENT SECURITIES GAINS (LOSSES), NET
Investment securities gains (losses), net	4,909	4,306	3,874	6,641
NON-INTEREST EXPENSE
Salaries and employee benefits	123,836	116,194	366,026	347,677
Net occupancy	12,293	11,631	34,939	34,333
Equipment	4,941	4,592	14,202	13,617
Supplies and communication	5,106	5,103	15,543	15,542
Data processing and software	23,457	22,056	68,965	63,762
Marketing	6,048	4,999	17,963	14,946
Deposit insurance	1,621	3,167	5,024	9,750
Community Service	564	580	2,008	1,965
Other	13,154	16,737	47,554	47,604
Total non-interest expense	191,020	185,059	572,224	549,196
Income before income taxes	139,181	140,716	396,294	406,866
Less income taxes	29,101	26,647	80,860	79,412
Net income	110,080	114,069	315,434	327,454
Less non-controlling interest expense (income)	838	1,493	1,083	3,564
Net income attributable to Commerce Bancshares, Inc.	109,242	112,576	314,351	323,890
Preferred Stock Dividends	2,250	2,250	6,750	6,750
Net Income (Loss) Available to Common Stockholders	$ 106,992	$ 110,326	$ 307,601	$ 317,140
Net income per common share — basic	$ 0.98	$ 0.99	$ 2.79	$ 2.83
Net income per common share — diluted	$ 0.98	$ 0.98	$ 2.79	$ 2.82

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 110,080	$ 114,069	$ 315,434	$ 327,454
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	(245)	53	(432)	(25)
Net unrealized gains (losses) on other securities	21,030	(32,232)	171,421	(125,442)
Pension loss amortization	389	393	1,166	1,180
Unrealized gains (losses) on cash flow hedge derivatives	14,101	(1,029)	36,687	(1,029)
Other comprehensive income (loss), net of tax	35,275	(32,815)	208,842	(125,316)
Comprehensive income	145,355	81,254	524,276	202,138
Non-controlling interest expense (income)	838	1,493	1,083	3,564
Comprehensive income attributable to Commerce Bancshares, Inc	$ 144,517	$ 79,761	$ 523,193	$ 198,574

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]
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2018-02 [Member]	$ 0				$ (2,932)		$ 2,932
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-01 [Member]	0				33,320		(33,320)
Balance at Dec. 31, 2017	2,718,184	$ 144,784	$ 535,407	$ 1,815,360	221,374	$ (14,473)	14,108	$ 1,624
Net income	327,454				323,890			3,564
Other comprehensive income (loss)	(125,316)						(125,316)
Distributions to non-controlling interest	(471)							(471)
Purchase of treasury stock	(39,575)					(39,575)
Issuance of stock, under purchase and equity compensation plans	(10)			(20,884)		20,874
Stock-based compensation	9,555			9,555
Cash dividends per share, Common Stock, Cash	(75,261)				(75,261)
Dividends per share, Preferred Stock, Cash	(6,750)				(6,750)
Balance at Sep. 30, 2018	2,807,810	144,784	535,407	1,804,031	493,641	(33,174)	(141,596)	4,717
Balance at Jun. 30, 2018	2,771,383	144,784	535,407	1,804,057	408,374	(15,854)	(108,781)	3,396
Net income	114,069				112,576			1,493
Other comprehensive income (loss)	(32,815)						(32,815)
Distributions to non-controlling interest	(172)							(172)
Purchase of treasury stock	(20,506)					(20,506)
Issuance of stock, under purchase and equity compensation plans	(1)			(3,187)		3,186
Stock-based compensation	3,161			3,161
Cash dividends per share, Common Stock, Cash	(25,059)				(25,059)
Dividends per share, Preferred Stock, Cash	(2,250)				(2,250)
Balance at Sep. 30, 2018	2,807,810	144,784	535,407	1,804,031	493,641	(33,174)	(141,596)	4,717
Balance at Dec. 31, 2018	2,937,149	144,784	559,432	2,084,824	241,163	(34,236)	(64,669)	5,851
Net income	315,434				314,351			1,083
Other comprehensive income (loss)	208,842						208,842
Distributions to non-controlling interest	(3,520)							(3,520)
Purchase of treasury stock	(119,970)					(119,970)
Accelerated Share Repurchases, Initial Price Paid	(150,000)			(37,500)		(112,500)
Issuance of stock, under purchase and equity compensation plans	(3)			(15,046)		15,043
Stock-based compensation	10,365			10,365
Cash dividends per share, Common Stock, Cash	(85,533)				(85,533)
Dividends per share, Preferred Stock, Cash	(6,750)				(6,750)
Balance at Sep. 30, 2019	3,106,014	144,784	559,432	2,042,643	463,231	(251,663)	144,173	3,414
Balance at Jun. 30, 2019	3,171,363	144,784	559,432	2,077,491	384,232	(106,106)	108,898	2,632
Net income	110,080				109,242			838
Other comprehensive income (loss)	35,275						35,275
Distributions to non-controlling interest	(56)							(56)
Purchase of treasury stock	(33,891)					(33,891)
Accelerated Share Repurchases, Initial Price Paid	(150,000)			(37,500)		(112,500)
Issuance of stock, under purchase and equity compensation plans	0			(834)		834
Stock-based compensation	3,486			3,486
Cash dividends per share, Common Stock, Cash	(27,993)				(27,993)
Dividends per share, Preferred Stock, Cash	(2,250)				(2,250)
Balance at Sep. 30, 2019	$ 3,106,014	$ 144,784	$ 559,432	$ 2,042,643	$ 463,231	$ (251,663)	$ 144,173	$ 3,414

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, per share, cash paid	$ 0.260	$ 0.224	$ 0.780	$ 0.671
Preferred Stock, Dividends, per share, cash paid	$ 0.375	$ 0.375	$ 1.125	$ 1.125

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
OPERATING ACTIVITIES:
Net income	$ 315,434	$ 327,454
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	35,232	30,438
Provision for depreciation and amortization	30,729	28,824
Amortization of investment security premiums, net	20,436	18,758
Investment securities (gains) losses, net	(3,874)	(6,641)
Net gains on sales of loans held for sale	(7,881)	(4,770)
Origination of loans held for sale	(187,792)	(149,397)
Proceeds from sales and repayments of held for sale	194,344	156,637
Net (increase) decrease in trading securities	(428)	(4,886)
Stock-based compensation	10,365	9,555
(Increase) decrease in interest receivable	229	(5,021)
Increase (decrease) in interest payable	5,938	689
Increase (decrease) in income taxes payable	23,530	30,107
Other changes, net	(58,928)	14,964
Net cash provided by (used in) operating activities	377,334	446,711
INVESTING ACTIVITIES:
Proceeds from sales of investment securities (A)	379,641	193,047
Proceeds from maturities/pay downs of investment securities (A)	1,007,553	1,222,998
Purchases of investment securities	(1,306,607)	(1,520,235)
Net (increase) decrease in loans	(357,438)	(3,588)
Long-term securities purchased under agreements to resell	(150,000)	(100,000)
Repayments of long-term securities purchased under agreements to resell	0	100,000
Purchases of land, buildings and equipment	(29,441)	(21,358)
Sales of land, buildings and equipment	2,029	2,342
Net cash provided by (used in) investing activities	(454,263)	(126,794)
FINANCING ACTIVITIES:
Net decrease in non-interest bearing, savings, interest checking and money market deposits	(230,229)	(177,368)
Net increase (decrease) in certificates of deposit	411,098	(94,906)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase	(315,115)	354,979
Repayment of long-term borrowings	(163)	(224)
Net increase in short-term borrowings	248,734	0
Purchases of treasury stock	(119,970)	(39,575)
Accelerated share repurchase agreement	(150,000)	0
Issuance of stock under equity compensation plans	(3)	(10)
Cash dividends paid on common stock	(85,533)	(75,261)
Cash dividends paid on preferred stock	(6,750)	(6,750)
Net cash provided by (used in) financing activities	(247,931)	(39,115)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease)	(324,860)	280,802
Cash, cash equivalents and restricted cash at beginning of year	1,209,240	524,352
Cash, cash equivalents and restricted cash at September 30	884,380	805,154
Supplemental Cash Flow Information:
Income tax payments, net	54,161	46,122
Interest paid on deposits and borrowings	73,448	44,074
Loans transferred to foreclosed real estate	$ 558	$ 1,312

Consolidated Statements Of Ca_2

Consolidated Statements Of Cash Flows Cash Flow Additional Information - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Restricted Cash and Cash Equivalents	$ 25.1	$ 13

Principles Of Consolidation And

Principles Of Consolidation And Presentation	9 Months Ended
	Sep. 30, 2019
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 2018 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, 2019 are not necessarily indicative of results to be attained for the full year or any other interim period.

Loans And Allowance For Loan Lo

Loans And Allowance For Loan Losses	9 Months Ended
	Sep. 30, 2019
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, 2019 and December 31, 2018 are as follows: (In thousands) September 30, 2019 December 31, 2018 Commercial: Business $ 5,393,268 $ 5,106,427 Real estate – construction and land 932,737 869,659 Real estate – business 2,833,146 2,875,788 Personal Banking: Real estate – personal 2,226,663 2,127,083 Consumer 1,953,690 1,955,572 Revolving home equity 349,111 376,399 Consumer credit card 766,743 814,134 Overdrafts 7,236 15,236 Total loans $ 14,462,594 $ 14,140,298 At September 30, 2019 , loans of $4.0 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, 2019 and 2018 , 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 $ 91,808 $ 69,374 $ 161,182 $ 92,869 $ 67,063 $ 159,932 Provision 553 10,410 10,963 55 35,177 35,232 Deductions: Loans charged off 490 13,990 14,480 1,436 42,233 43,669 Less recoveries on loans 199 2,818 3,017 582 8,605 9,187 Net loan charge-offs 291 11,172 11,463 854 33,628 34,482 Balance September 30, 2019 $ 92,070 $ 68,612 $ 160,682 $ 92,070 $ 68,612 $ 160,682 Balance at beginning of period $ 93,851 $ 65,681 $ 159,532 $ 93,704 $ 65,828 $ 159,532 Provision 411 9,588 9,999 2 30,436 30,438 Deductions: Loans charged off 485 12,515 13,000 1,213 39,203 40,416 Less recoveries on loans 314 2,887 3,201 1,598 8,580 10,178 Net loan charge-offs (recoveries) 171 9,628 9,799 (385 ) 30,623 30,238 Balance September 30, 2018 $ 94,091 $ 65,641 $ 159,732 $ 94,091 $ 65,641 $ 159,732 The following table shows the balance in the allowance for loan losses and the related loan balance at September 30, 2019 and December 31, 2018 , disaggregated on the basis of impairment methodology. Impaired loans evaluated under Accounting Standards Codification (ASC) 310-10-35 include loans on non-accrual status, which are individually evaluated for impairment, and other impaired loans deemed to have similar risk characteristics, which 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, 2019 Commercial $ 1,594 $ 66,399 $ 90,476 $ 9,092,752 Personal Banking 905 17,283 67,707 5,286,160 Total $ 2,499 $ 83,682 $ 158,183 $ 14,378,912 December 31, 2018 Commercial $ 1,780 $ 61,496 $ 91,089 $ 8,790,378 Personal Banking 916 17,120 66,147 5,271,304 Total $ 2,696 $ 78,616 $ 157,236 $ 14,061,682 Impaired loans The table below shows the Company’s investment in impaired loans at September 30, 2019 and December 31, 2018 . 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 below. (In thousands) Sept. 30, 2019 Dec. 31, 2018 Non-accrual loans $ 11,733 $ 12,536 Restructured loans (accruing) 71,949 66,080 Total impaired loans $ 83,682 $ 78,616 The following table provides additional information about impaired loans held by the Company at September 30, 2019 and December 31, 2018 , 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, 2019 With no related allowance recorded: Business $ 7,632 $ 14,100 $ — Real estate – business 1,364 1,364 — $ 8,996 $ 15,464 $ — With an allowance recorded: Business $ 27,975 $ 28,017 $ 744 Real estate – construction and land 48 52 1 Real estate – business 29,380 29,982 849 Real estate – personal 4,736 5,922 247 Consumer 4,825 4,824 29 Revolving home equity 36 36 1 Consumer credit card 7,686 7,686 628 $ 74,686 $ 76,519 $ 2,499 Total $ 83,682 $ 91,983 $ 2,499 December 31, 2018 With no related allowance recorded: Business $ 8,725 $ 14,477 $ — $ 8,725 $ 14,477 $ — With an allowance recorded: Business $ 40,286 $ 40,582 $ 1,223 Real estate – construction and land 416 421 11 Real estate – business 12,069 12,699 546 Real estate – personal 4,461 6,236 266 Consumer 5,510 5,510 38 Revolving home equity 40 40 1 Consumer credit card 7,109 7,109 611 $ 69,891 $ 72,597 $ 2,696 Total $ 78,616 $ 87,074 $ 2,696 Total average impaired loans for the three and nine month periods ended September 30, 2019 and 2018 , respectively, are shown in the table below. (In thousands) Commercial Personal Banking Total Average Impaired Loans: For the three months ended September 30, 2019 Non-accrual loans $ 9,655 $ 1,903 $ 11,558 Restructured loans (accruing) 53,517 15,644 69,161 Total $ 63,172 $ 17,547 $ 80,719 For the nine months ended September 30, 2019 Non-accrual loans $ 9,881 $ 2,074 $ 11,955 Restructured loans (accruing) 48,248 15,605 63,853 Total $ 58,129 $ 17,679 $ 75,808 For the three months ended September 30, 2018 Non-accrual loans $ 7,477 $ 1,862 $ 9,339 Restructured loans (accruing) 83,493 16,409 99,902 Total $ 90,970 $ 18,271 $ 109,241 For the nine months ended September 30, 2018 Non-accrual loans $ 7,888 $ 2,261 $ 10,149 Restructured loans (accruing) 81,543 17,426 98,969 Total $ 89,431 $ 19,687 $ 109,118 The table below shows interest income recognized during the three and nine month periods ended September 30, 2019 and 2018 , respectively, for impaired loans held at the end of each period. This interest all relates to accruing restructured loans, as discussed in the "Troubled debt restructurings" section below. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2019 2018 2019 2018 Interest income recognized on impaired loans: Business $ 222 $ 939 $ 665 $ 2,817 Real estate – construction and land 1 6 2 19 Real estate – business 363 110 1,088 329 Real estate – personal 31 47 92 142 Consumer 76 79 227 238 Revolving home equity 1 2 2 6 Consumer credit card 181 129 542 386 Total $ 875 $ 1,312 $ 2,618 $ 3,937 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, 2019 and December 31, 2018 . (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, 2019 Commercial: Business $ 5,365,188 $ 19,334 $ 993 $ 7,753 $ 5,393,268 Real estate – construction and land 925,805 6,918 11 3 932,737 Real estate – business 2,824,165 6,622 — 2,359 2,833,146 Personal Banking: Real estate – personal 2,216,292 6,354 2,399 1,618 2,226,663 Consumer 1,926,310 25,031 2,349 — 1,953,690 Revolving home equity 347,956 994 161 — 349,111 Consumer credit card 745,438 10,910 10,395 — 766,743 Overdrafts 6,910 326 — — 7,236 Total $ 14,358,064 $ 76,489 $ 16,308 $ 11,733 $ 14,462,594 December 31, 2018 Commercial: Business $ 5,086,912 $ 10,057 $ 473 $ 8,985 $ 5,106,427 Real estate – construction and land 867,692 1,963 — 4 869,659 Real estate – business 2,867,347 6,704 22 1,715 2,875,788 Personal Banking: Real estate – personal 2,118,045 6,041 1,165 1,832 2,127,083 Consumer 1,916,320 35,608 3,644 — 1,955,572 Revolving home equity 374,830 875 694 — 376,399 Consumer credit card 792,334 11,140 10,660 — 814,134 Overdrafts 14,937 299 — — 15,236 Total $ 14,038,417 $ 72,687 $ 16,658 $ 12,536 $ 14,140,298 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, 2019 Pass $ 5,225,204 $ 888,688 $ 2,665,880 $ 8,779,772 Special mention 86,152 43,155 102,219 231,526 Substandard 74,159 891 62,688 137,738 Non-accrual 7,753 3 2,359 10,115 Total $ 5,393,268 $ 932,737 $ 2,833,146 $ 9,159,151 December 31, 2018 Pass $ 4,915,042 $ 866,527 $ 2,777,374 $ 8,558,943 Special mention 84,391 1,917 51,845 138,153 Substandard 98,009 1,211 44,854 144,074 Non-accrual 8,985 4 1,715 10,704 Total $ 5,106,427 $ 869,659 $ 2,875,788 $ 8,851,874 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 section on "Delinquent and non-accrual loans." 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 real estate loans for which FICO scores are not obtained because the loans generally pertain to commercial customer activities and are often underwritten with other collateral considerations. These loans totaled $196.1 million at September 30, 2019 and $201.7 million at December 31, 2018 . The table also excludes consumer loans related to the Company's patient healthcare loan program, which totaled $178.4 million at September 30, 2019 and $170.3 million at December 31, 2018 . As the healthcare loans are guaranteed by the hospital, customer FICO scores are not obtained for these loans. The personal real estate loans and consumer loans excluded below totaled less than 8% of the Personal Banking portfolio. For the remainder of loans in the Personal Banking portfolio, the table below shows the percentage of balances outstanding at September 30, 2019 and December 31, 2018 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card September 30, 2019 FICO score: Under 600 1.2 % 3.0 % 1.0 % 5.4 % 600 - 659 2.0 4.9 2.1 14.4 660 - 719 10.0 15.8 9.6 33.2 720 - 779 28.0 25.7 22.5 26.8 780 and over 58.8 50.6 64.8 20.2 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2018 FICO score: Under 600 1.1 % 3.1 % 0.8 % 4.4 % 600 - 659 1.8 4.8 1.7 14.0 660 - 719 9.4 16.1 9.1 34.8 720 - 779 24.7 25.7 24.0 26.4 780 and over 63.0 50.3 64.4 20.4 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, as shown in the table below. 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. Commercial performing restructured loans are primarily comprised of certain business, construction and business real estate loans classified as substandard but renewed at rates judged to be non- market. These 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 and other small consumer loans under various debt management and assistance programs. Modifications to these loans generally involve removing the available line of credit, placing loans on amortizing status, and lowering the contractual interest rate. Certain personal real estate, revolving home equity, and consumer loans were classified as consumer bankruptcy troubled debt restructurings because they were not reaffirmed by the borrower in bankruptcy proceedings. Interest on these loans is being recognized on an accrual basis, as the borrowers are continuing to make payments. Other consumer loans classified as troubled debt restructurings consist of various other workout arrangements with consumer customers. (In thousands) September 30, 2019 December 31, 2018 Accruing restructured loans: Commercial $ 56,238 $ 50,904 Assistance programs 7,988 7,410 Consumer bankruptcy 3,838 4,103 Other consumer 3,885 3,663 Non-accrual loans 9,553 9,759 Total troubled debt restructurings $ 81,502 $ 75,839 The table below shows the balance of troubled debt restructurings by loan classification at September 30, 2019 , 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, 2019 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 35,139 $ — Real estate - construction and land 45 — Real estate - business 29,749 — Personal Banking: Real estate - personal 4,022 353 Consumer 4,825 48 Revolving home equity 36 — Consumer credit card 7,686 593 Total troubled debt restructurings $ 81,502 $ 994 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. However, the effects of modifications to loans under various debt management and assistance programs were estimated to decrease interest income by approximately $1.1 million on an annual, pre-tax basis, compared to amounts contractually owed. Other modifications to consumer loans mainly involve extensions and other small modifications that did not include the forgiveness of principal or interest. 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 having no other concessions granted other than being renewed at non-market interest rates are judged to 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 $5.2 million at September 30, 2019 to lend additional funds to borrowers with restructured loans. Loans held for sale The Company designates certain long-term fixed rate personal real estate loans 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 11. The loans are primarily sold to FNMA, FHLMC, and GNMA. At September 30, 2019 , the fair value of these loans was $14.4 million , and the unpaid principal balance was $14.0 million . The Company also designates 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 within 210 days after the last disbursement to the student. These loans are carried at lower of cost or fair value, which at September 30, 2019 totaled $5.7 million . At September 30, 2019 , none of the loans held for sale were on non-accrual status or 90 days past due and still accruing. Foreclosed real estate/repossessed assets The Company’s holdings of foreclosed real estate totaled $502 thousand and $1.4 million at September 30, 2019 and December 31, 2018 , respectively. Personal property acquired in repossession, generally autos, marine and recreational vehicles (RV), totaled $1.8 million and $2.0 million at September 30, 2019 and December 31, 2018 , 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, 2019
Investment Securities [Abstract]
Investment Securities	Investment Securities Investment securities consisted of the following at September 30, 2019 and December 31, 2018 . September 30, 2019 December 31, 2018 Available for sale debt securities $ 8,660,419 $ 8,538,041 Trading debt securities 35,918 27,059 Equity securities: Readily determinable fair value 2,902 2,585 No readily determinable fair value 1,284 1,824 Other: Federal Reserve Bank stock 33,770 33,498 Federal Home Loan Bank stock 20,000 10,000 Private equity investments 93,441 85,659 Total investment securities $ 8,847,734 $ 8,698,666 The Company has elected to measure equity securities with no readily determinable fair value at cost minus impairment, if any, plus or minus changes resulting from observable price changes for the identical or similar investment of the same issuer. The Company did not record any impairment or other adjustments to the carrying amount of these investments during the period. Other investment securities include Federal Reserve Bank (FRB) stock, Federal Home Loan Bank (FHLB) stock, and investments in portfolio concerns held by the Company's private equity subsidiaries. FRB stock and FHLB stock are held for debt and regulatory purposes. Investment in FRB 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. The private equity investments, in the absence of readily ascertainable market values, are carried at estimated fair value. The majority of the Company’s investment portfolio is comprised of available for sale debt securities, which are carried at fair value with changes in fair value reported in accumulated other comprehensive income (AOCI). A summary of the available for sale debt securities by maturity groupings as of September 30, 2019 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 commercial and 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 $ 57,175 $ 56,726 After 1 but within 5 years 516,924 533,605 After 5 but within 10 years 252,452 259,546 Total U.S. government and federal agency obligations 826,551 849,877 Government-sponsored enterprise obligations: Within 1 year 51,562 51,551 After 1 but within 5 years 55,049 55,162 After 5 but within 10 years 34,987 35,032 After 10 years 26,085 27,072 Total government-sponsored enterprise obligations 167,683 168,817 State and municipal obligations: Within 1 year 57,870 58,039 After 1 but within 5 years 709,484 728,639 After 5 but within 10 years 354,519 374,236 After 10 years 41,538 42,581 Total state and municipal obligations 1,163,411 1,203,495 Mortgage and asset-backed securities: Agency mortgage-backed securities 3,791,709 3,858,575 Non-agency mortgage-backed securities 921,080 936,577 Asset-backed securities 1,288,360 1,298,835 Total mortgage and asset-backed securities 6,001,149 6,093,987 Other debt securities: Within 1 year 43,894 43,965 After 1 but within 5 years 239,692 243,606 After 5 but within 10 years 54,613 56,672 Total other debt securities 338,199 344,243 Total available for sale debt securities $ 8,496,993 $ 8,660,419 Investments in U.S. government and federal agency obligations include U.S. Treasury inflation-protected securities, which totaled $458.6 million , at fair value, at September 30, 2019 . Interest paid on these securities increases with inflation and decreases with deflation, as measured by the Consumer Price Index. Included in state and municipal obligations are $9.9 million , at fair value, of auction rate securities, which were purchased from bank customers in 2008. Interest on these bonds is currently being paid at the maximum failed auction rates. For debt securities classified as available for sale, the following table shows the unrealized gains and losses (pre-tax) in AOCI, by security type. (In thousands) Amortized Cost Gross Gross Fair Value September 30, 2019 U.S. government and federal agency obligations $ 826,551 $ 23,878 $ (552 ) $ 849,877 Government-sponsored enterprise obligations 167,683 1,172 (38 ) 168,817 State and municipal obligations 1,163,411 40,097 (13 ) 1,203,495 Mortgage and asset-backed securities: Agency mortgage-backed securities 3,791,709 69,002 (2,136 ) 3,858,575 Non-agency mortgage-backed securities 921,080 16,528 (1,031 ) 936,577 Asset-backed securities 1,288,360 13,238 (2,763 ) 1,298,835 Total mortgage and asset-backed securities 6,001,149 98,768 (5,930 ) 6,093,987 Other debt securities 338,199 6,052 (8 ) 344,243 Total $ 8,496,993 $ 169,967 $ (6,541 ) $ 8,660,419 December 31, 2018 U.S. government and federal agency obligations $ 914,486 $ 4,545 $ (11,379 ) $ 907,652 Government-sponsored enterprise obligations 199,470 55 (3,747 ) 195,778 State and municipal obligations 1,322,785 10,284 (5,030 ) 1,328,039 Mortgage and asset-backed securities: Agency mortgage-backed securities 3,253,433 9,820 (48,268 ) 3,214,985 Non-agency mortgage-backed securities 1,053,854 6,641 (12,779 ) 1,047,716 Asset-backed securities 1,518,976 3,849 (11,211 ) 1,511,614 Total mortgage and asset-backed securities 5,826,263 20,310 (72,258 ) 5,774,315 Other debt securities 339,595 72 (7,410 ) 332,257 Total $ 8,602,599 $ 35,266 $ (99,824 ) $ 8,538,041 The Company’s impairment policy requires a review of all securities for which fair value is less than amortized cost. Special emphasis is placed on securities whose credit rating has fallen below Baa3 (Moody's) or BBB- (Standard & Poor's), whose fair values have fallen more than 20% below purchase price for an extended period of time, or who have been identified based on management’s judgment. These securities are placed on a watch list and cash flow analyses are prepared on an individual security basis. Inputs to these models include factors such as cash flow projections, contractual payments required, expected delinquency rates, credit support from other tranches, prepayment speeds, collateral loss severity rates (including loan to values), and various other information related to the underlying collateral (including current delinquencies). 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, 2019 , the fair value of securities on this watch list was $47.9 million compared to $57.7 million at December 31, 2018 . As of September 30, 2019 , the Company had recorded other-than-temporary impairment (OTTI) on certain non-agency mortgage-backed securities with a current par value of $18.4 million . These securities, which are part of the watch list mentioned above, had an aggregate fair value of $14.0 million at September 30, 2019 . The cumulative credit-related portion of the impairment on these securities, which was recorded in earnings, totaled $13.4 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, 2019 included the following: Significant Inputs Range Prepayment CPR 0% - 25% Projected cumulative default 6% - 52% Credit support 0% - 19% Loss severity 10% - 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) 2019 2018 Cumulative OTTI credit losses at January 1 $ 14,092 $ 14,199 Credit losses on debt securities for which impairment was not previously recognized 48 58 Credit losses on debt securities for which impairment was previously recognized 85 10 Increase in expected cash flows that are recognized over remaining life of security (831 ) (138 ) Cumulative OTTI credit losses at September 30 $ 13,394 $ 14,129 Debt securities with unrealized losses recorded in AOCI 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, 2019 U.S. government and federal agency obligations $ 90,662 $ 126 $ 52,930 $ 426 $ 143,592 $ 552 Government-sponsored enterprise obligations — — 36,409 38 36,409 38 State and municipal obligations 15,726 9 1,551 4 17,277 13 Mortgage and asset-backed securities: Agency mortgage-backed securities 343,820 1,271 182,805 865 526,625 2,136 Non-agency mortgage-backed securities 38,085 103 311,040 928 349,125 1,031 Asset-backed securities 369,537 1,979 140,726 784 510,263 2,763 Total mortgage and asset-backed securities 751,442 3,353 634,571 2,577 1,386,013 5,930 Other debt securities — — 8,492 8 8,492 8 Total $ 857,830 $ 3,488 $ 733,953 $ 3,053 $ 1,591,783 $ 6,541 December 31, 2018 U.S. government and federal agency obligations $ 317,699 $ 6,515 $ 116,728 $ 4,864 $ 434,427 $ 11,379 Government-sponsored enterprise obligations — — 188,846 3,747 188,846 3,747 State and municipal obligations 157,838 704 257,051 4,326 414,889 5,030 Mortgage and asset-backed securities: Agency mortgage-backed securities 330,933 1,502 1,927,268 46,766 2,258,201 48,268 Non-agency mortgage-backed securities 207,506 1,085 657,685 11,694 865,191 12,779 Asset-backed securities 147,997 728 813,427 10,483 961,424 11,211 Total mortgage and asset-backed securities 686,436 3,315 3,398,380 68,943 4,084,816 72,258 Other debt securities 51,836 564 260,682 6,846 312,518 7,410 Total $ 1,213,809 $ 11,098 $ 4,221,687 $ 88,726 $ 5,435,496 $ 99,824 The available for sale debt portfolio included $1.6 billion of securities that were in a loss position at September 30, 2019 , compared to $5.4 billion at December 31, 2018 . The total amount of unrealized loss on these securities was $6.5 million at September 30, 2019 , a decrease of $93.3 million compared to the loss at December 31, 2018 . This decrease in losses was mainly due to a declining interest rate environment at September 30, 2019 . The following tables present 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) 2019 2018 Proceeds from sales of securities: Available for sale debt securities $ 368,939 $ 153,066 Equity securities 3,459 39,981 Other 7,243 — Total proceeds $ 379,641 $ 193,047 Investment securities gains (losses), net: Available for sale debt securities: Gains realized on sales $ 2,287 $ 430 Losses realized on sales (1,559 ) — Other-than-temporary impairment recognized on debt securities (133 ) (68 ) Equity securities: Gains realized on sales 2,865 102 Losses realized on sales — (8,917 ) Fair value adjustments, net 318 2,723 Other: Gains realized on sales 1,094 — Fair value adjustments, net (998 ) 12,371 Total investment securities gains, net $ 3,874 $ 6,641 Net gains and losses on investment securities for the nine months ended September 30, 2019 included net gains of $728 thousand , $2.9 million and $1.1 million realized on sales of available for sale, equity and private equity securities, respectively, as well as net losses in fair value of $1.0 million on private equity investments. At September 30, 2019 , securities totaling $3.9 billion in fair value were pledged to secure public fund deposits, securities sold under agreements to repurchase, trust funds, and borrowings at the FRB and FHLB. Securities pledged under agreements pursuant to which the collateral may be sold or re-pledged by the secured parties approximated $205.6 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, 2019
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, 2019 December 31, 2018 (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 $ (29,366 ) $ — $ 1,904 $ 31,270 $ (28,954 ) $ — $ 2,316 Mortgage servicing rights 12,198 (4,559 ) (404 ) 7,235 10,339 (3,861 ) — 6,478 Total $ 43,468 $ (33,925 ) $ (404 ) $ 9,139 $ 41,609 $ (32,815 ) $ — $ 8,794 Aggregate amortization expense on intangible assets was $395 thousand and $318 thousand for the three month periods ended September 30, 2019 and 2018 , respectively, and $1.1 million and $952 thousand for the nine month periods ended September 30, 2019 and 2018 , 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, 2019 . 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) 2019 $ 1,494 2020 1,441 2021 1,210 2022 1,025 2023 851 Changes in the carrying amount of goodwill and net other intangible assets for the nine month period ended September 30, 2019 are as follows: (In thousands) Goodwill Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2019 $ 138,921 $ 2,316 $ 6,478 Originations — — 1,859 Amortization — (412 ) (698 ) Impairment — — (404 ) Balance September 30, 2019 $ 138,921 $ 1,904 $ 7,235 Goodwill allocated to the Company’s operating segments at September 30, 2019 and December 31, 2018 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, 2019
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, 2019 , that net liability was $1.9 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 $364.4 million at September 30, 2019 . 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, 2019 , 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 1 year to 11 years . At September 30, 2019 , the fair value of the Company's guarantee liabilities for RPAs was $248 thousand , and the notional amount of the underlying swaps was $100.6 million

Leases Leases

Leases Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Leases The Company adopted ASU 2016-02, "Leases", and its related amendments on January 1, 2019 using a modified retrospective approach. The Company's leasing activities include leasing certain real estate and equipment, providing lease financing to commercial customers, and leasing office space to third parties. The Company adopted the package of practical expedients permitted within the new standard, along with the lease component expedient for all lease classes and the disclosure expedient. The Company uses the FHLB fixed-advance rate at lease commencement or remeasurement event based on the remaining lease term to calculate the liability for each lease. Lessee The Company primarily has operating leases for branches, office space, ATM locations, and certain equipment. As of September 30, 2019 , the right-of-use asset, reported within premises and equipment, net, and lease liability, reported within other liabilities, recognized on the Company's consolidated balance sheets totaled $26.4 million and $27.1 million , respectively. For leases with a term of 12 months or less, an election was made not to recognize lease assets and lease liabilities for all asset classes, and to recognize lease expense for these leases on a straight-line basis over the lease term. Total lease cost for the three and nine months ended September 30, 2019 was $1.8 million and $5.5 million , respectively. The Company's leases have remaining terms of 1 month to 35 years , most of which contain renewal options. However, the renewal options are generally not included in the leased asset or liability because the option exercises are uncertain. The maturities of operating leases are included in the table below. (in thousands) Operating Leases (a) 2019 (excluding the nine months ended September 30, 2019) $ 1,452 2020 5,400 2021 4,579 2022 4,093 2023 3,772 After 2023 15,123 Total lease payments $ 34,419 Less: Interest (b) 7,337 Present value of lease liabilities $ 27,082 (a) Excludes $2.9 million of legally binding minimum lease payments for operating leases signed but not yet commenced. (b) Calculated using the interest rate for each lease. The following table presents the average lease term and discount rate of operating leases. September 30, 2019 Weighted-average remaining lease term 11.8 years Weighted-average discount rate 3.72 % Supplemental cash flow information related to operating leases is included in the table below. For the Three Months Ended September 30 For the Nine Months Ended September 30 (in thousands) 2019 2019 Operating cash paid toward lease liabilities $ 1,446 $ 4,487 Leased assets obtained in exchange for new lease liabilities $ 659 $ 2,751 The Company adopted the new lease standard using the effective date as the date of initial application as noted above, and as required, the table below provides the disclosure for periods prior to adoption. Future minimum lease payments as of December 31, 2018 are shown below, which include leases that have not yet commenced. (in thousands) Year Ended December 31 Total 2019 $ 5,763 2020 4,817 2021 4,055 2022 3,598 2023 3,273 After 15,161 Total minimum lease payments $ 36,667 Lessor The Company has net investments in direct financing and sales-type leases to commercial, industrial, and tax-exempt entities. These leases are included within business loans on the Company's consolidated balance sheets. The Company primarily leases various types of equipment, trucks and trailers, and office furniture and fixtures. Lease agreements may include options to renew or for the lessee to purchase the leased equipment at the end of the lease term. The Company has elected to adopt the lease component expedient in which the lease and nonlease components are combined into the total lease receivable. The Company also leases office space to third parties, and these leases are classified as operating leases. The leases may include options to renew or expand the leased space, and currently the leases have remaining terms of 1 month to 9 years . The following table provides the components of lease income. For the Three Months Ended September 30 For the Nine Months Ended September 30 (in thousands) 2019 2019 Direct financing and sales-type leases 6,092 17,988 Operating leases (a) 1,984 5,816 Total lease income $ 8,076 $ 23,804 (a) Includes rent of $19 thousand and $56 thousand , respectively, from Tower Properties Company, a related party, for the three and nine months ended September 30, 2019 . The following table presents the components of the net investments in direct financing and sales-type leases. (in thousands) September 30, 2019 Lease payment receivable $ 710,676 Unguaranteed residual assets 54,938 Total net investments in direct financing and sales-type leases $ 765,614 Deferred origination cost 3,546 Total net investment included within business loans $ 769,160 The maturities of lease receivables are included in the table below. (in thousands) Direct Financing and Sale-Type Leases Operating Leases Total 2019 (excluding the nine months ended September 30, 2019) $ 51,888 $ 1,918 $ 53,806 2020 200,390 7,057 207,447 2021 156,798 7,036 163,834 2022 117,779 13,314 131,093 2023 86,746 5,084 91,830 After 2023 160,852 13,096 173,948 Total lease receipts 774,453 $ 47,505 $ 821,958 Less: Net present value adjustment 63,777 Present value of lease receipts $ 710,676

Pension

Pension	9 Months Ended
	Sep. 30, 2019
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) 2019 2018 2019 2018 Service cost - benefits earned during the period $ 159 $ 127 $ 477 $ 432 Interest cost on projected benefit obligation 1,065 916 3,195 2,817 Expected return on plan assets (1,196 ) (1,067 ) (3,589 ) (3,942 ) Amortization of prior service cost (68 ) (68 ) (203 ) (203 ) Amortization of unrecognized net loss 586 592 1,757 1,776 Net periodic pension cost $ 546 $ 500 $ 1,637 $ 880 All benefits accrued under the Company’s defined benefit pension plan have been frozen since January 1, 2011. During the first nine months of 2019

Common Stock

Common Stock	9 Months Ended
	Sep. 30, 2019
Common Stock [Abstract]
Common Stock	Common 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 13. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands, except per share data) 2019 2018 2019 2018 Basic income per common share: Net income attributable to Commerce Bancshares, Inc. $ 109,242 $ 112,576 $ 314,351 $ 323,890 Less preferred stock dividends 2,250 2,250 6,750 6,750 Net income available to common shareholders 106,992 110,326 307,601 317,140 Less income allocated to nonvested restricted stock 1,040 1,161 2,996 3,421 Net income allocated to common stock $ 105,952 $ 109,165 $ 304,605 $ 313,719 Weighted average common shares outstanding 107,602 110,889 109,024 110,925 Basic income per common share $ .98 $ .99 $ 2.79 $ 2.83 Diluted income per common share: Net income available to common shareholders $ 106,992 $ 110,326 $ 307,601 $ 317,140 Less income allocated to nonvested restricted stock 1,039 1,159 2,991 3,413 Net income allocated to common stock $ 105,953 $ 109,167 $ 304,610 $ 313,727 Weighted average common shares outstanding 107,602 110,889 109,024 110,925 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 254 371 270 360 Weighted average diluted common shares outstanding 107,856 111,260 109,294 111,285 Diluted income per common share $ .98 $ .98 $ 2.79 $ 2.82 Unexercised stock appreciation rights of 360 thousand and 92 thousand for the three month periods ended September 30, 2019 and 2018 , respectively, and 334 thousand and 219 thousand for the nine month periods ended September 30, 2019 and 2018 , respectively, were excluded from the computation of diluted income per common share because their inclusion would have been anti-dilutive. On August 7, 2019, the Company entered into an accelerated share repurchase ("ASR") agreement with Morgan Stanley & Co. LLC (Morgan Stanley). Under this ASR agreement, the Company paid $150.0 million to Morgan Stanley and received from Morgan Stanley 1,994,327 shares of the Company’s common stock, representing approximately 75% of the estimated total number of shares to be delivered by Morgan Stanley at the conclusion of the program. The ASR is scheduled to end in December 2019, but it may conclude earlier at Morgan Stanley's option, at which time the Company will receive the remaining shares. The specific number of shares that the Company will ultimately repurchase is based on the volume-weighted-average price per share of the Company's common stock during the repurchase period. In the Annual Meeting of the Shareholders, held on April 17, 2019, a proposal to increase the shares of Company common stock authorized for issuance under its articles of incorporation was approved. The approval increased the authorized shares from 120,000,000 to 140,000,000 . * All prior year share and per share amounts in this note have been restated for the 5% common stock dividend distributed in December 2018.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2019
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 debt 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. Another 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. The remaining component is gains and losses in fair value on certain interest rate floors that have been designated as cash flow hedging instruments. Unrealized Gains (Losses) on Securities (1) Pension Loss Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2) Total Accumulated Other Comprehensive Income (Loss) (In thousands) OTTI Other Balance January 1, 2019 $ 3,861 $ (52,278 ) $ (23,107 ) $ 6,855 $ (64,669 ) Other comprehensive income (loss) before reclassifications to current earnings (709 ) 229,288 — 46,165 274,744 Amounts reclassified to current earnings from accumulated other comprehensive income 133 (728 ) 1,554 2,751 3,710 Current period other comprehensive income (loss), before tax (576 ) 228,560 1,554 48,916 278,454 Income tax (expense) benefit 144 (57,139 ) (388 ) (12,229 ) (69,612 ) Current period other comprehensive income (loss), net of tax (432 ) 171,421 1,166 36,687 208,842 Transfer of unrealized gain on securities for which impairment was not previously recognized 35 (35 ) — — — Balance September 30, 2019 $ 3,464 $ 119,108 $ (21,941 ) $ 43,542 $ 144,173 Balance January 1, 2018 $ 3,411 $ 30,326 $ (19,629 ) $ — $ 14,108 ASU 2018-02 Reclassification of tax rate change 715 6,359 (4,142 ) — 2,932 ASU 2016-01 Reclassification of unrealized gain on equity securities — (33,320 ) — — (33,320 ) Other comprehensive loss before reclassifications to current earnings (102 ) (166,824 ) — (1,625 ) (168,551 ) Amounts reclassified to current earnings from accumulated other comprehensive income 68 (431 ) 1,573 253 1,463 Current period other comprehensive income (loss), before tax (34 ) (167,255 ) 1,573 (1,372 ) (167,088 ) Income tax (expense) benefit 9 41,813 (393 ) 343 41,772 Current period other comprehensive income (loss), net of tax (25 ) (125,442 ) 1,180 (1,029 ) (125,316 ) Transfer of unrealized gain on securities for which impairment was not previously recognized 12 (12 ) — — — Balance September 30, 2018 $ 4,113 $ (122,089 ) $ (22,591 ) $ (1,029 ) $ (141,596 ) (1) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains, net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income. The requirement to revalue deferred tax assets and liabilities in the period of enactment stranded the effects of the tax rate change, mandated by the Tax Cuts and Jobs Act, in accumulated other comprehensive income. In response, the FASB issued ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” which the Company adopted on January 1, 2018. This ASU allowed the reclassification of the stranded tax effects from accumulated other comprehensive income (as shown in the table above) to retained earnings. New accounting guidance, which was effective January 1, 2018, required the reclassification of unrealized gains on equity securities from accumulated other comprehensive income to retained earnings (also shown above).

Segments

Segments	9 Months Ended
	Sep. 30, 2019
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 consists of various consumer loan and deposit products offered through its retail branch network of approximately 165 locations. This segment also includes indirect and other consumer loan financing businesses, along with debit and credit card loan and fee businesses. Residential mortgage origination, sales and servicing functions are included in this Consumer segment, but residential mortgage loans retained by the Company are not considered part of this segment. The Commercial segment provides corporate lending, leasing, and international services, along with business and governmental deposit products and commercial cash management services. This segment includes both merchant and commercial bank card products. It also includes the Capital Markets Group, which sells fixed income securities and provides safekeeping and accounting services to its business and correspondent bank customers. The Wealth segment provides traditional trust and estate planning, advisory and discretionary investment management, and brokerage services. This segment also provides various loan and deposit related services to its private banking customers. 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 changes are reflected in prior year information presented below. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended September 30, 2019 Net interest income $ 80,111 $ 84,857 $ 11,548 $ 176,516 $ 26,996 $ 203,512 Provision for loan losses (10,757 ) (345 ) (197 ) (11,299 ) 336 (10,963 ) Non-interest income 36,049 53,462 46,410 135,921 (3,178 ) 132,743 Investment securities gains, net — — — — 4,909 4,909 Non-interest expense (73,948 ) (76,058 ) (30,538 ) (180,544 ) (10,476 ) (191,020 ) Income before income taxes $ 31,455 $ 61,916 $ 27,223 $ 120,594 $ 18,587 $ 139,181 Nine Months Ended September 30, 2019 Net interest income $ 236,215 $ 255,781 $ 35,800 $ 527,796 $ 90,838 $ 618,634 Provision for loan losses (33,061 ) (1,053 ) (165 ) (34,279 ) (953 ) (35,232 ) Non-interest income 98,840 151,655 135,774 386,269 (5,027 ) 381,242 Investment securities gains, net — — — — 3,874 3,874 Non-interest expense (223,580 ) (231,586 ) (92,647 ) (547,813 ) (24,411 ) (572,224 ) Income before income taxes $ 78,414 $ 174,797 $ 78,762 $ 331,973 $ 64,321 $ 396,294 Three Months Ended September 30, 2018 Net interest income $ 74,594 $ 87,979 $ 11,704 $ 174,277 $ 33,477 $ 207,754 Provision for loan losses (9,592 ) (166 ) 80 (9,678 ) (321 ) (9,999 ) Non-interest income 31,397 49,679 43,790 124,866 (1,152 ) 123,714 Investment securities gains, net — — — — 4,306 4,306 Non-interest expense (70,861 ) (73,696 ) (30,436 ) (174,993 ) (10,066 ) (185,059 ) Income before income taxes $ 25,538 $ 63,796 $ 25,138 $ 114,472 $ 26,244 $ 140,716 Nine Months Ended September 30, 2018 Net interest income $ 218,719 $ 255,790 $ 35,006 $ 509,515 $ 102,090 $ 611,605 Provision for loan losses (30,252 ) 322 32 (29,898 ) (540 ) (30,438 ) Non-interest income 93,729 150,535 128,794 373,058 (4,804 ) 368,254 Investment securities gains, net — — — — 6,641 6,641 Non-interest expense (212,442 ) (221,854 ) (92,546 ) (526,842 ) (22,354 ) (549,196 ) Income before income taxes $ 69,754 $ 184,793 $ 71,286 $ 325,833 $ 81,033 $ 406,866 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, 2019
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. At September 30, 2019 , with the exception of the interest rate floors (discussed below), 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, 2019 December 31, 2018 Interest rate swaps $ 2,353,450 $ 2,006,280 Interest rate floors 1,500,000 1,000,000 Interest rate caps 59,782 62,163 Credit risk participation agreements 195,930 143,460 Foreign exchange contracts 5,481 6,206 Mortgage loan commitments 24,889 14,544 Mortgage loan forward sale contracts 4,124 5,768 Forward TBA contracts 34,500 16,500 Total notional amount $ 4,178,156 $ 3,254,921 The largest group of notional amounts relate to interest rate swap contracts sold to commercial customers who wish to modify their interest rate sensitivity. The customers are engaged in a variety of businesses, including real estate, manufacturing, retail product distribution, education, and retirement communities. These customer 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. As of September 30, 2019 , the Company has entered into three interest rate floors with a combined notional value of $1.5 billion , to hedge the risk of declining interest rates on certain floating rate commercial loans indexed to one month LIBOR. The first interest rate floor has a purchased strike rate of 2.25% and is effective on January 1, 2020 and matures on January 1, 2026 . The second interest rate floor has a purchased strike rate of 2.50% and is effective on June 1, 2020 and matures on June 1, 2026 . The third interest rate floor has a purchased strike rate of 2.00% and is effective December 15, 2020 and matures on December 15, 2026 . The premiums paid for these floors totaled $31.3 million . As of September 30, 2019 , the maximum length of time over which the Company is hedging its exposure to the variability in future cash flows is approximately 7.0 years . The interest rate floors qualified and were designated as cash flow hedges and were assessed for effectiveness using regression analysis. The change in the fair value of the interest rate floors are recorded in AOCI, net of the amortization of the premium paid, which is recorded against interest and fees on loans in the consolidated statements of income. As of September 30, 2019 , net deferred gains on the interest rate floors totaled $58.1 million (pre-tax) and was recorded in AOCI in the consolidated balance sheet. As of September 30, 2019 , it is expected that $4.1 million (pre-tax) of interest rate floor premium amortization will be reclassified from AOCI into earnings over the next twelve months. 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. Under its program to sell residential mortgage loans in the secondary market, the Company designates certain newly-originated residential mortgage loans as held for sale. Derivative instruments arising from this activity include mortgage loan commitments and forward loan sale contracts. 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. Information about the valuation methods used to determine fair value is provided in Note 16 on Fair Value Measurements in the 2018 Annual Report on Form 10-K. The Company's policy is to present its derivative assets and derivative liabilities on a gross basis in its consolidated balance sheets, and these are reported in other assets and other liabilities. Effective January 2017, certain collateral posted to and from the Company's clearing counterparty has been offset against the fair values of cleared swaps, such that at September 30, 2019 in the table below, the positive fair values of cleared swaps were reduced by $207 thousand and the negative fair values of cleared swaps were reduced by $36.6 million . At December 31, 2018 , the positive fair values of cleared swaps were reduced by $8.1 million and the negative fair values of cleared swaps were reduced by $6.5 million . Asset Derivatives Liability Derivatives Sept. 30, 2019 Dec. 31, 2018 Sept. 30, 2019 Dec. 31, 2018 (In thousands ) Fair Value Fair Value Derivatives designated as hedging instruments: Interest rate floors $ 85,876 $ 29,031 $ — $ — Total derivatives designated as hedging instruments $ 85,876 $ 29,031 $ — $ — Derivative instruments not designated as hedging instruments: Interest rate swaps $ 47,894 $ 11,537 $ (11,451 ) $ (13,110 ) Interest rate caps 4 24 (4 ) (24 ) Credit risk participation agreements 192 47 (248 ) (93 ) Foreign exchange contracts 26 20 (16 ) (8 ) Mortgage loan commitments 823 536 — — Mortgage loan forward sale contracts 13 15 (5 ) (8 ) Forward TBA contracts 46 — (32 ) (178 ) Total derivatives not designated as hedging instruments $ 48,998 $ 12,179 $ (11,756 ) $ (13,421 ) Total $ 134,874 $ 41,210 $ (11,756 ) $ (13,421 ) The pre-tax effects of derivative instruments on the consolidated statements of income are shown in the tables below. Amount of Gain or (Loss) Recognized in OCI Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income (In thousands) Total Included Component Excluded Component Total Included Component Excluded Component For the Three Months Ended September 30, 2019 Derivatives in cash flow hedging relationships: Interest rate floors $ 17,760 $ 31,422 $ (13,662 ) Interest and fees on loans $ (1,042 ) $ — $ (1,042 ) Total $ 17,760 $ 31,422 $ (13,662 ) Total $ (1,042 ) $ — $ (1,042 ) For the Nine Months Ended September 30, 2019 Derivatives in cash flow hedging relationships: Interest rate floors $ 46,165 $ 77,559 $ (31,394 ) Interest and fees on loans $ (2,751 ) $ — $ (2,751 ) Total $ 46,165 $ 77,559 $ (31,394 ) Total $ (2,751 ) $ — $ (2,751 ) For the Three Months Ended September 30, 2018 Derivatives in cash flow hedging relationships: Interest rate floors $ (1,625 ) $ — $ (1,625 ) Interest and fees on loans $ (253 ) $ — $ (253 ) Total $ (1,625 ) $ — $ (1,625 ) Total $ (253 ) $ — $ (253 ) For the Nine Months Ended September 30, 2018 Derivatives in cash flow hedging relationships: Interest rate floors $ (1,625 ) $ — $ (1,625 ) Interest and fees on loans $ (253 ) $ — $ (253 ) Total $ (1,625 ) $ — $ (1,625 ) Total $ (253 ) $ — $ (253 ) 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) 2019 2018 2019 2018 Derivative instruments: Interest rate swaps Other non-interest income $ 1,519 $ 692 $ 2,646 $ 2,924 Credit risk participation agreements Other non-interest income 37 (7 ) 78 173 Foreign exchange contracts Other non-interest income (5 ) (120 ) (2 ) 62 Mortgage loan commitments Loan fees and sales (112 ) (50 ) 287 99 Mortgage loan forward sale contracts Loan fees and sales (2 ) — 1 6 Forward TBA contracts Loan fees and sales (1,412 ) 113 (819 ) 646 Total $ 25 $ 628 $ 2,191 $ 3,910 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. Collateral exchanged between the Company and dealer bank counterparties is generally subject to thresholds and transfer minimums, and usually consists of marketable securities. By contract, these 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 or securities to its clearing agent. 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, 2019 Assets: Derivatives subject to master netting agreements 133,971 — 133,971 (10,081 ) (75,373 ) 48,517 Derivatives not subject to master netting agreements 903 — 903 Total derivatives 134,874 — 134,874 Liabilities: Derivatives subject to master netting agreements 11,555 — 11,555 (10,081 ) (533 ) 941 Derivatives not subject to master netting agreements 201 — 201 Total derivatives 11,756 — 11,756 December 31, 2018 Assets: Derivatives subject to master netting agreements $ 40,613 $ — $ 40,613 $ (2,992 ) $ (26,174 ) $ 11,447 Derivatives not subject to master netting agreements 597 — 597 Total derivatives 41,210 — 41,210 Liabilities: Derivatives subject to master netting agreements $ 13,333 $ — $ 13,333 $ (2,992 ) $ (261 ) $ 10,080 Derivatives not subject to master netting agreements 88 — 88 Total derivatives 13,421 — 13,421

Resale and Repurchase Agreement

Resale and Repurchase Agreements (Notes)	9 Months Ended
	Sep. 30, 2019
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 $200.0 million at September 30, 2019 and $450.0 million at December 31, 2018 . At September 30, 2019 , the Company had posted collateral of $204.9 million in marketable securities, consisting of agency mortgage-backed bonds, and had accepted $209.8 million in agency mortgage-backed 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, 2019 Total resale agreements, subject to master netting arrangements $ 1,050,000 $ (200,000 ) $ 850,000 $ — $ (850,000 ) $ — Total repurchase agreements, subject to master netting arrangements 1,583,944 (200,000 ) 1,383,944 — (1,383,944 ) — December 31, 2018 Total resale agreements, subject to master netting arrangements $ 1,150,000 $ (450,000 ) $ 700,000 $ — $ (700,000 ) $ — Total repurchase agreements, subject to master netting arrangements 2,393,219 (450,000 ) 1,943,219 — (1,943,219 ) — The table below shows the remaining contractual maturities of repurchase agreements outstanding at September 30, 2019 and December 31, 2018 , in addition to the various types of marketable securities that have been pledged by the Company 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, 2019 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 347,904 $ — $ — $ 347,904 Government-sponsored enterprise obligations 48,209 — — 48,209 Agency mortgage-backed securities 547,537 41,821 231,604 820,962 Non-agency mortgage-backed securities 127,689 — — 127,689 Asset-backed securities 67,962 45,000 40,000 152,962 Other debt securities 86,218 — — 86,218 Total repurchase agreements, gross amount recognized $ 1,225,519 $ 86,821 $ 271,604 $ 1,583,944 December 31, 2018 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 387,541 $ 150,000 $ 100,000 $ 637,541 Government-sponsored enterprise obligations 18,466 — — 18,466 Agency mortgage-backed securities 882,744 31,774 213,752 1,128,270 Non-agency mortgage-backed securities 187,740 — — 187,740 Asset-backed securities 322,680 — — 322,680 Other debt securities 98,522 — — 98,522 Total repurchase agreements, gross amount recognized $ 1,897,693 $ 181,774 $ 313,752 $ 2,393,219

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement, Noncash Expense [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 $3.5 million and $3.2 million in the three months ended September 30, 2019 and 2018 , respectively, and $10.4 million and $9.6 million in the nine months ended September 30, 2019 and 2018 , respectively. Nonvested stock awards granted generally vest in 4 years 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, 2019 , and changes during the nine month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2019 1,180,940 $43.24 Granted 199,252 61.57 Vested (312,122 ) 33.00 Forfeited (11,894 ) 49.17 Nonvested at September 30, 2019 1,056,176 $49.65 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 contractual terms of 10 years . 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 $11.92 Assumptions: Dividend yield 1.7 % Volatility 19.8 % Risk-free interest rate 2.6 % Expected term 6.0 years A summary of SAR activity during the first nine months of 2019 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, 2019 1,066,438 $40.22 Granted 186,943 61.76 Forfeited (5,383 ) 52.00 Expired (1,837 ) 38.88 Exercised (127,447 ) 34.10 Outstanding at September 30, 2019 1,118,714 $44.47 6.7 years $ 18,310

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers The core principle of ASU 2014-09, "Revenue from Contracts with Customers," is that an entity should recognize revenue to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. For the nine months ended September 30, 2019 , approximately 62% of the Company’s total revenue was comprised of net interest income, which is not within the scope of this guidance. Of the remaining revenue, those items that were subject to this guidance mainly included fees for bank card, trust, deposit account services and consumer brokerage services. The following table disaggregates non-interest income subject to ASU 2014-09 by major product line. Three Months Ended September 30 Nine Months Ended September 30 (In thousands) 2019 2018 2019 2018 Bank card transaction fees $ 44,510 $ 42,427 $ 126,800 $ 127,095 Trust fees 39,592 37,400 115,223 110,498 Deposit account charges and other fees 24,032 23,755 71,009 70,630 Consumer brokerage services 4,030 3,884 11,665 11,623 Other non-interest income 9,809 6,977 27,003 21,140 Total non-interest income from contracts with customers 121,973 114,443 351,700 340,986 Other non-interest income (a) 10,770 9,271 29,542 27,268 Total non-interest income $ 132,743 $ 123,714 $ 381,242 $ 368,254 (a) This revenue is not within the scope of ASU 2014-09, and includes fees relating to capital market activities, loan fees and sales, derivative instruments, standby letters of credit and various other transactions. For bank card transaction fees, the majority of debit and credit card fees are earned in the Consumer segment, while corporate card and merchant fees are earned in the Commercial segment. The Consumer and Commercial segments each contribute approximately half of the Company's deposit account charge revenue. All trust fees and nearly all of the consumer brokerage services income are earned in the Wealth segment. The following table presents the opening and closing receivable balances for the nine month periods ended September 30, 2019 and 2018 for the Company’s significant revenue categories subject to ASU 2014-09. (In thousands) September 30, 2019 December 31, 2018 September 30, 2018 December 31, 2017 Bank card transaction fees $ 10,871 $ 13,035 $ 10,591 $ 13,315 Trust fees 2,666 2,721 2,533 2,802 Deposit account charges and other fees 5,154 6,107 5,176 5,597 Consumer brokerage services 655 559 521 380 For these revenue categories, none of the transaction price has been allocated to performance obligations that are unsatisfied as of the end of a reporting period.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
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 debt securities, equity securities, trading debt securities, certain investments 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 2018 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, 2019 and December 31, 2018 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 2019 or the year ended December 31, 2018 . 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, 2019 Assets: Residential mortgage loans held for sale $ 14,393 $ — $ 14,393 $ — Available for sale debt securities: U.S. government and federal agency obligations 849,877 849,877 — — Government-sponsored enterprise obligations 168,817 — 168,817 — State and municipal obligations 1,203,495 — 1,193,598 9,897 Agency mortgage-backed securities 3,858,575 — 3,858,575 — Non-agency mortgage-backed securities 936,577 — 936,577 — Asset-backed securities 1,298,835 — 1,298,835 — Other debt securities 344,243 — 344,243 — Trading debt securities 35,918 — 35,918 — Equity securities 2,902 2,902 — — Private equity investments 93,441 — — 93,441 Derivatives * 134,874 — 133,859 1,015 Assets held in trust for deferred compensation plan 15,571 15,571 — — Total assets 8,957,518 868,350 7,984,815 104,353 Liabilities: Derivatives * 11,756 — 11,508 248 Liabilities held in trust for deferred compensation plan 15,571 15,571 — — Total liabilities $ 27,327 $ 15,571 $ 11,508 $ 248 December 31, 2018 Assets: Residential mortgage loans held for sale $ 13,529 $ — $ 13,529 $ — Available for sale debt securities: U.S. government and federal agency obligations 907,652 907,652 — — Government-sponsored enterprise obligations 195,778 — 195,778 — State and municipal obligations 1,328,039 — 1,313,881 14,158 Agency mortgage-backed securities 3,214,985 — 3,214,985 — Non-agency mortgage-backed securities 1,047,716 — 1,047,716 — Asset-backed securities 1,511,614 — 1,511,614 — Other debt securities 332,257 — 332,257 — Trading debt securities 27,059 — 27,059 — Equity securities 2,585 2,585 — — Private equity investments 85,659 — — 85,659 Derivatives * 41,210 — 40,627 583 Assets held in trust for deferred compensation plan 12,968 12,968 — — Total assets 8,721,051 923,205 7,697,446 100,400 Liabilities: Derivatives * 13,421 — 13,328 93 Liabilities held in trust for deferred compensation plan 12,968 12,968 — — Total liabilities $ 26,389 $ 12,968 $ 13,328 $ 93 * The fair value of each class of derivative is shown in Note 11. 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, 2019 Balance June 30, 2019 $ 11,641 $ 86,411 $ 883 $ 98,935 Total gains or losses (realized/unrealized): Included in earnings — 2,020 (75 ) 1,945 Included in other comprehensive income * (65 ) — — (65 ) Investment securities called (1,715 ) — — (1,715 ) Discount accretion 36 — — 36 Purchases of private equity investments — 5,010 — 5,010 Purchase of risk participation agreement — — 200 200 Sale of risk participation agreement — — (241 ) (241 ) Balance September 30, 2019 $ 9,897 $ 93,441 $ 767 $ 104,105 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, 2019 $ — $ 2,020 $ 860 $ 2,880 For the nine months ended September 30, 2019 Balance January 1, 2019 $ 14,158 $ 85,659 $ 490 $ 100,307 Total gains or losses (realized/unrealized): Included in earnings — (998 ) 365 (633 ) Included in other comprehensive income * 294 — — 294 Investment securities called (4,635 ) — — (4,635 ) Discount accretion 80 — — 80 Purchases of private equity investments — 14,899 — 14,899 Sale/pay down of private equity investments — (6,150 ) — (6,150 ) Capitalized interest/dividends — 31 — 31 Purchase of risk participation agreement — — 226 226 Sale of risk participation agreement — — (314 ) (314 ) Balance September 30, 2019 $ 9,897 $ 93,441 $ 767 $ 104,105 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, 2019 $ — $ (2,448 ) $ 916 $ (1,532 ) Fair Value Measurements Using (In thousands) State and Municipal Obligations Private Equity Derivatives Total For the three months ended September 30, 2018 Balance June 30, 2018 $ 15,073 $ 68,940 $ 684 $ 84,697 Total gains or losses (realized/unrealized): Included in earnings — 4,275 (58 ) 4,217 Included in other comprehensive income * 167 — — 167 Investment securities sold (518 ) — — (518 ) Discount accretion 7 — — 7 Purchases of private equity investments — 10,407 — 10,407 Purchase of risk participation agreement — — 50 50 Sale of risk participation agreement — — (31 ) (31 ) Balance September 30, 2018 $ 14,729 $ 83,622 $ 645 $ 98,996 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, 2018 $ — $ 4,275 $ 672 $ 4,947 For the nine months ended September 30, 2018 Balance January 1, 2018 $ 17,016 $ 55,752 $ 503 $ 73,271 Total gains or losses (realized/unrealized): Included in earnings — 12,371 271 12,642 Included in other comprehensive income * (79 ) — — (79 ) Investment securities sold (2,233 ) — — (2,233 ) Discount accretion 25 — — 25 Purchases of private equity investments — 15,650 — 15,650 Sale/pay down of private equity investments — (186 ) — (186 ) Capitalized interest/dividends — 35 — 35 Purchase of risk participation agreement — — 50 50 Sale of risk participation agreement — — (179 ) (179 ) Balance September 30, 2018 $ 14,729 $ 83,622 $ 645 $ 98,996 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, 2018 $ — $ 12,371 $ 852 $ 13,223 * 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, 2019 Total gains or losses included in earnings $ (112 ) $ 37 $ 2,020 $ 1,945 Change in unrealized gains or losses relating to assets still held at September 30, 2019 $ 823 $ 37 $ 2,020 $ 2,880 For the nine months ended September 30, 2019 Total gains or losses included in earnings $ 287 $ 78 $ (998 ) $ (633 ) Change in unrealized gains or losses relating to assets still held at September 30, 2019 $ 823 $ 93 $ (2,448 ) $ (1,532 ) For the three months ended September 30, 2018 Total gains or losses included in earnings $ (51 ) $ (7 ) $ 4,275 $ 4,217 Change in unrealized gains or losses relating to assets still held at September 30, 2018 $ 679 $ (7 ) $ 4,275 $ 4,947 For the nine months ended September 30, 2018 Total gains or losses included in earnings $ 98 $ 173 $ 12,371 $ 12,642 Change in unrealized gains or losses relating to assets still held at September 30, 2018 $ 679 $ 173 $ 12,371 $ 13,223 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 $9.9 million at September 30, 2019 , while private equity investments, included in other securities, totaled $93.4 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 3.4% - 3.8% Private equity investments Market comparable companies EBITDA multiple 4.0 - 6.0 Mortgage loan commitments Discounted cash flow Probability of funding 46.0% - 99.9% 81.4% Embedded servicing value —% - 2.3% 1.2% 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 2019 and 2018 , and still held as of September 30, 2019 and 2018 , 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, 2019 and 2018 . 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 September 30, 2019 Collateral dependent impaired loans $ 171 $ — $ — $ 171 $ (139 ) Mortgage servicing rights 7,235 — — 7,235 (404 ) Long-lived assets 820 — — 820 (318 ) September 30, 2018 Collateral dependent impaired loans $ 230 $ — $ — $ 230 $ (197 ) Mortgage servicing rights 6,008 — — 6,008 9 Long-lived assets 2,319 — — 2,319 (858 )

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	9 Months Ended
	Sep. 30, 2019
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 Company prospectively adopted ASU 2016-01 on January 1, 2018. In accordance with its requirements, the fair value of loans as of September 30, 2019 and December 31, 2018 were measured using an exit price notion. 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 at September 30, 2019 and December 31, 2018 : Carrying Amount Estimated Fair Value at September 30, 2019 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 5,393,268 $ — $ — $ 5,375,226 $ 5,375,226 Real estate - construction and land 932,737 — — 929,954 929,954 Real estate - business 2,833,146 — — 2,859,958 2,859,958 Real estate - personal 2,226,663 — — 2,228,234 2,228,234 Consumer 1,953,690 — — 1,921,227 1,921,227 Revolving home equity 349,111 — — 346,065 346,065 Consumer credit card 766,743 — — 709,327 709,327 Overdrafts 7,236 — — 5,164 5,164 Total loans 14,462,594 — — 14,375,155 14,375,155 Loans held for sale 20,064 — 20,064 — 20,064 Investment securities 8,847,734 852,779 7,836,563 158,392 8,847,734 Federal funds sold 2,850 2,850 — — 2,850 Securities purchased under agreements to resell 850,000 — — 876,225 876,225 Interest earning deposits with banks 344,129 344,129 — — 344,129 Cash and due from banks 512,254 512,254 — — 512,254 Derivative instruments 134,874 — 133,859 1,015 134,874 Assets held in trust for deferred compensation plan 15,571 15,571 — — 15,571 Total $ 25,190,070 $ 1,727,583 $ 7,990,486 $ 15,410,787 $ 25,128,856 Financial Liabilities Non-interest bearing deposits $ 6,816,527 $ 6,816,527 $ — $ — $ 6,816,527 Savings, interest checking and money market deposits 11,424,404 11,424,404 — — 11,424,404 Certificates of deposit 2,069,220 — — 2,086,278 2,086,278 Federal funds purchased 257,330 257,330 — — 257,330 Securities sold under agreements to repurchase 1,383,944 — — 1,384,859 1,384,859 Other borrowings 255,796 — 5,008 251,221 256,229 Derivative instruments 11,756 — 11,508 248 11,756 Liabilities held in trust for deferred compensation plan 15,571 15,571 — — 15,571 Total $ 22,234,548 $ 18,513,832 $ 16,516 $ 3,722,606 $ 22,252,954 Carrying Amount Estimated Fair Value at December 31, 2018 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 5,106,427 $ — $ — $ 5,017,694 $ 5,017,694 Real estate - construction and land 869,659 — — 868,274 868,274 Real estate - business 2,875,788 — — 2,846,095 2,846,095 Real estate - personal 2,127,083 — — 2,084,370 2,084,370 Consumer 1,955,572 — — 1,916,627 1,916,627 Revolving home equity 376,399 — — 365,069 365,069 Consumer credit card 814,134 — — 756,651 756,651 Overdrafts 15,236 — — 11,223 11,223 Total loans 14,140,298 — — 13,866,003 13,866,003 Loans held for sale 20,694 — 20,694 — 20,694 Investment securities 8,698,666 910,237 7,643,290 145,139 8,698,666 Federal funds sold 3,320 3,320 — — 3,320 Securities purchased under agreements to resell 700,000 — — 693,228 693,228 Interest earning deposits with banks 689,876 689,876 — — 689,876 Cash and due from banks 507,892 507,892 — — 507,892 Derivative instruments 41,210 — 40,627 583 41,210 Assets held in trust for deferred compensation plan 12,968 12,968 — — 12,968 Total $ 24,814,924 $ 2,124,293 $ 7,704,611 $ 14,704,953 $ 24,533,857 Financial Liabilities Non-interest bearing deposits $ 6,980,298 $ 6,980,298 $ — $ — $ 6,980,298 Savings, interest checking and money market deposits 11,685,239 11,685,239 — — 11,685,239 Certificates of deposit 1,658,122 — — 1,663,748 1,663,748 Federal funds purchased 13,170 13,170 — — 13,170 Securities sold under agreements to repurchase 1,943,219 — — 1,944,458 1,944,458 Other borrowings 8,702 — 7,751 951 8,702 Derivative instruments 13,421 — 13,328 93 13,421 Liabilities held in trust for deferred compensation plan 12,968 12,968 — — 12,968 Total $ 22,315,139 $ 18,691,675 $ 21,079 $ 3,609,250 $ 22,322,004

Legal and Regulatory Proceeding

Legal and Regulatory Proceedings (Notes)	9 Months Ended
	Sep. 30, 2019
Legal Proceedings [Abstract]
Legal Matters and Contingencies [Text Block]	Legal and Regulatory Proceedings The Company has various legal proceedings pending at September 30, 2019 , 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 _2

Loans And Allowance For Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
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, 2019 and December 31, 2018 are as follows: (In thousands) September 30, 2019 December 31, 2018 Commercial: Business $ 5,393,268 $ 5,106,427 Real estate – construction and land 932,737 869,659 Real estate – business 2,833,146 2,875,788 Personal Banking: Real estate – personal 2,226,663 2,127,083 Consumer 1,953,690 1,955,572 Revolving home equity 349,111 376,399 Consumer credit card 766,743 814,134 Overdrafts 7,236 15,236 Total loans $ 14,462,594 $ 14,140,298
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, 2019 and 2018 , 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 $ 91,808 $ 69,374 $ 161,182 $ 92,869 $ 67,063 $ 159,932 Provision 553 10,410 10,963 55 35,177 35,232 Deductions: Loans charged off 490 13,990 14,480 1,436 42,233 43,669 Less recoveries on loans 199 2,818 3,017 582 8,605 9,187 Net loan charge-offs 291 11,172 11,463 854 33,628 34,482 Balance September 30, 2019 $ 92,070 $ 68,612 $ 160,682 $ 92,070 $ 68,612 $ 160,682 Balance at beginning of period $ 93,851 $ 65,681 $ 159,532 $ 93,704 $ 65,828 $ 159,532 Provision 411 9,588 9,999 2 30,436 30,438 Deductions: Loans charged off 485 12,515 13,000 1,213 39,203 40,416 Less recoveries on loans 314 2,887 3,201 1,598 8,580 10,178 Net loan charge-offs (recoveries) 171 9,628 9,799 (385 ) 30,623 30,238 Balance September 30, 2018 $ 94,091 $ 65,641 $ 159,732 $ 94,091 $ 65,641 $ 159,732
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, 2019 and December 31, 2018 , disaggregated on the basis of impairment methodology. Impaired loans evaluated under Accounting Standards Codification (ASC) 310-10-35 include loans on non-accrual status, which are individually evaluated for impairment, and other impaired loans deemed to have similar risk characteristics, which 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, 2019 Commercial $ 1,594 $ 66,399 $ 90,476 $ 9,092,752 Personal Banking 905 17,283 67,707 5,286,160 Total $ 2,499 $ 83,682 $ 158,183 $ 14,378,912 December 31, 2018 Commercial $ 1,780 $ 61,496 $ 91,089 $ 8,790,378 Personal Banking 916 17,120 66,147 5,271,304 Total $ 2,696 $ 78,616 $ 157,236 $ 14,061,682
Investment In Impaired Loans	The table below shows the Company’s investment in impaired loans at September 30, 2019 and December 31, 2018 . 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 below. (In thousands) Sept. 30, 2019 Dec. 31, 2018 Non-accrual loans $ 11,733 $ 12,536 Restructured loans (accruing) 71,949 66,080 Total impaired loans $ 83,682 $ 78,616
Additional Information About Impaired Loans Held	The following table provides additional information about impaired loans held by the Company at September 30, 2019 and December 31, 2018 , 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, 2019 With no related allowance recorded: Business $ 7,632 $ 14,100 $ — Real estate – business 1,364 1,364 — $ 8,996 $ 15,464 $ — With an allowance recorded: Business $ 27,975 $ 28,017 $ 744 Real estate – construction and land 48 52 1 Real estate – business 29,380 29,982 849 Real estate – personal 4,736 5,922 247 Consumer 4,825 4,824 29 Revolving home equity 36 36 1 Consumer credit card 7,686 7,686 628 $ 74,686 $ 76,519 $ 2,499 Total $ 83,682 $ 91,983 $ 2,499 December 31, 2018 With no related allowance recorded: Business $ 8,725 $ 14,477 $ — $ 8,725 $ 14,477 $ — With an allowance recorded: Business $ 40,286 $ 40,582 $ 1,223 Real estate – construction and land 416 421 11 Real estate – business 12,069 12,699 546 Real estate – personal 4,461 6,236 266 Consumer 5,510 5,510 38 Revolving home equity 40 40 1 Consumer credit card 7,109 7,109 611 $ 69,891 $ 72,597 $ 2,696 Total $ 78,616 $ 87,074 $ 2,696
Total Average Impaired Loans	Total average impaired loans for the three and nine month periods ended September 30, 2019 and 2018 , respectively, are shown in the table below. (In thousands) Commercial Personal Banking Total Average Impaired Loans: For the three months ended September 30, 2019 Non-accrual loans $ 9,655 $ 1,903 $ 11,558 Restructured loans (accruing) 53,517 15,644 69,161 Total $ 63,172 $ 17,547 $ 80,719 For the nine months ended September 30, 2019 Non-accrual loans $ 9,881 $ 2,074 $ 11,955 Restructured loans (accruing) 48,248 15,605 63,853 Total $ 58,129 $ 17,679 $ 75,808 For the three months ended September 30, 2018 Non-accrual loans $ 7,477 $ 1,862 $ 9,339 Restructured loans (accruing) 83,493 16,409 99,902 Total $ 90,970 $ 18,271 $ 109,241 For the nine months ended September 30, 2018 Non-accrual loans $ 7,888 $ 2,261 $ 10,149 Restructured loans (accruing) 81,543 17,426 98,969 Total $ 89,431 $ 19,687 $ 109,118
Interest Income Recognized On Impaired Loans	The table below shows interest income recognized during the three and nine month periods ended September 30, 2019 and 2018 , respectively, for impaired loans held at the end of each period. This interest all relates to accruing restructured loans, as discussed in the "Troubled debt restructurings" section below. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands) 2019 2018 2019 2018 Interest income recognized on impaired loans: Business $ 222 $ 939 $ 665 $ 2,817 Real estate – construction and land 1 6 2 19 Real estate – business 363 110 1,088 329 Real estate – personal 31 47 92 142 Consumer 76 79 227 238 Revolving home equity 1 2 2 6 Consumer credit card 181 129 542 386 Total $ 875 $ 1,312 $ 2,618 $ 3,937
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, 2019 and December 31, 2018 . (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, 2019 Commercial: Business $ 5,365,188 $ 19,334 $ 993 $ 7,753 $ 5,393,268 Real estate – construction and land 925,805 6,918 11 3 932,737 Real estate – business 2,824,165 6,622 — 2,359 2,833,146 Personal Banking: Real estate – personal 2,216,292 6,354 2,399 1,618 2,226,663 Consumer 1,926,310 25,031 2,349 — 1,953,690 Revolving home equity 347,956 994 161 — 349,111 Consumer credit card 745,438 10,910 10,395 — 766,743 Overdrafts 6,910 326 — — 7,236 Total $ 14,358,064 $ 76,489 $ 16,308 $ 11,733 $ 14,462,594 December 31, 2018 Commercial: Business $ 5,086,912 $ 10,057 $ 473 $ 8,985 $ 5,106,427 Real estate – construction and land 867,692 1,963 — 4 869,659 Real estate – business 2,867,347 6,704 22 1,715 2,875,788 Personal Banking: Real estate – personal 2,118,045 6,041 1,165 1,832 2,127,083 Consumer 1,916,320 35,608 3,644 — 1,955,572 Revolving home equity 374,830 875 694 — 376,399 Consumer credit card 792,334 11,140 10,660 — 814,134 Overdrafts 14,937 299 — — 15,236 Total $ 14,038,417 $ 72,687 $ 16,658 $ 12,536 $ 14,140,298
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, 2019 Pass $ 5,225,204 $ 888,688 $ 2,665,880 $ 8,779,772 Special mention 86,152 43,155 102,219 231,526 Substandard 74,159 891 62,688 137,738 Non-accrual 7,753 3 2,359 10,115 Total $ 5,393,268 $ 932,737 $ 2,833,146 $ 9,159,151 December 31, 2018 Pass $ 4,915,042 $ 866,527 $ 2,777,374 $ 8,558,943 Special mention 84,391 1,917 51,845 138,153 Substandard 98,009 1,211 44,854 144,074 Non-accrual 8,985 4 1,715 10,704 Total $ 5,106,427 $ 869,659 $ 2,875,788 $ 8,851,874
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, 2019 and December 31, 2018 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card September 30, 2019 FICO score: Under 600 1.2 % 3.0 % 1.0 % 5.4 % 600 - 659 2.0 4.9 2.1 14.4 660 - 719 10.0 15.8 9.6 33.2 720 - 779 28.0 25.7 22.5 26.8 780 and over 58.8 50.6 64.8 20.2 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2018 FICO score: Under 600 1.1 % 3.1 % 0.8 % 4.4 % 600 - 659 1.8 4.8 1.7 14.0 660 - 719 9.4 16.1 9.1 34.8 720 - 779 24.7 25.7 24.0 26.4 780 and over 63.0 50.3 64.4 20.4 Total 100.0 % 100.0 % 100.0 % 100.0 %
Additional Information about Troubled Debt Restructurings [Table Text Block]	(In thousands) September 30, 2019 December 31, 2018 Accruing restructured loans: Commercial $ 56,238 $ 50,904 Assistance programs 7,988 7,410 Consumer bankruptcy 3,838 4,103 Other consumer 3,885 3,663 Non-accrual loans 9,553 9,759 Total troubled debt restructurings $ 81,502 $ 75,839
Outstanding Balance Of Loans Classified As Troubled Debt Restructurings	The table below shows the balance of troubled debt restructurings by loan classification at September 30, 2019 , 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, 2019 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 35,139 $ — Real estate - construction and land 45 — Real estate - business 29,749 — Personal Banking: Real estate - personal 4,022 353 Consumer 4,825 48 Revolving home equity 36 — Consumer credit card 7,686 593 Total troubled debt restructurings $ 81,502 $ 994

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investment Securities [Abstract]
Investment Securities, At Fair Value	September 30, 2019 December 31, 2018 Available for sale debt securities $ 8,660,419 $ 8,538,041 Trading debt securities 35,918 27,059 Equity securities: Readily determinable fair value 2,902 2,585 No readily determinable fair value 1,284 1,824 Other: Federal Reserve Bank stock 33,770 33,498 Federal Home Loan Bank stock 20,000 10,000 Private equity investments 93,441 85,659 Total investment securities $ 8,847,734 $ 8,698,666
Summary Of Available For Sale Investment Securities By Maturity Groupings	A summary of the available for sale debt securities by maturity groupings as of September 30, 2019 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 commercial and 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 $ 57,175 $ 56,726 After 1 but within 5 years 516,924 533,605 After 5 but within 10 years 252,452 259,546 Total U.S. government and federal agency obligations 826,551 849,877 Government-sponsored enterprise obligations: Within 1 year 51,562 51,551 After 1 but within 5 years 55,049 55,162 After 5 but within 10 years 34,987 35,032 After 10 years 26,085 27,072 Total government-sponsored enterprise obligations 167,683 168,817 State and municipal obligations: Within 1 year 57,870 58,039 After 1 but within 5 years 709,484 728,639 After 5 but within 10 years 354,519 374,236 After 10 years 41,538 42,581 Total state and municipal obligations 1,163,411 1,203,495 Mortgage and asset-backed securities: Agency mortgage-backed securities 3,791,709 3,858,575 Non-agency mortgage-backed securities 921,080 936,577 Asset-backed securities 1,288,360 1,298,835 Total mortgage and asset-backed securities 6,001,149 6,093,987 Other debt securities: Within 1 year 43,894 43,965 After 1 but within 5 years 239,692 243,606 After 5 but within 10 years 54,613 56,672 Total other debt securities 338,199 344,243 Total available for sale debt securities $ 8,496,993 $ 8,660,419
Available For Sale Securities Unrealized Gains And Losses By Security Type	For debt securities classified as available for sale, the following table shows the unrealized gains and losses (pre-tax) in AOCI, by security type. (In thousands) Amortized Cost Gross Gross Fair Value September 30, 2019 U.S. government and federal agency obligations $ 826,551 $ 23,878 $ (552 ) $ 849,877 Government-sponsored enterprise obligations 167,683 1,172 (38 ) 168,817 State and municipal obligations 1,163,411 40,097 (13 ) 1,203,495 Mortgage and asset-backed securities: Agency mortgage-backed securities 3,791,709 69,002 (2,136 ) 3,858,575 Non-agency mortgage-backed securities 921,080 16,528 (1,031 ) 936,577 Asset-backed securities 1,288,360 13,238 (2,763 ) 1,298,835 Total mortgage and asset-backed securities 6,001,149 98,768 (5,930 ) 6,093,987 Other debt securities 338,199 6,052 (8 ) 344,243 Total $ 8,496,993 $ 169,967 $ (6,541 ) $ 8,660,419 December 31, 2018 U.S. government and federal agency obligations $ 914,486 $ 4,545 $ (11,379 ) $ 907,652 Government-sponsored enterprise obligations 199,470 55 (3,747 ) 195,778 State and municipal obligations 1,322,785 10,284 (5,030 ) 1,328,039 Mortgage and asset-backed securities: Agency mortgage-backed securities 3,253,433 9,820 (48,268 ) 3,214,985 Non-agency mortgage-backed securities 1,053,854 6,641 (12,779 ) 1,047,716 Asset-backed securities 1,518,976 3,849 (11,211 ) 1,511,614 Total mortgage and asset-backed securities 5,826,263 20,310 (72,258 ) 5,774,315 Other debt securities 339,595 72 (7,410 ) 332,257 Total $ 8,602,599 $ 35,266 $ (99,824 ) $ 8,538,041
Cash Flow Model Inputs Used To Calculate Credit Losses	Significant inputs to the cash flow models used to calculate the credit losses on these securities at September 30, 2019 included the following: Significant Inputs Range Prepayment CPR 0% - 25% Projected cumulative default 6% - 52% Credit support 0% - 19% Loss severity 10% - 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) 2019 2018 Cumulative OTTI credit losses at January 1 $ 14,092 $ 14,199 Credit losses on debt securities for which impairment was not previously recognized 48 58 Credit losses on debt securities for which impairment was previously recognized 85 10 Increase in expected cash flows that are recognized over remaining life of security (831 ) (138 ) Cumulative OTTI credit losses at September 30 $ 13,394 $ 14,129
Securities With Unrealized Losses And Length Of Impairment Period	Debt securities with unrealized losses recorded in AOCI 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, 2019 U.S. government and federal agency obligations $ 90,662 $ 126 $ 52,930 $ 426 $ 143,592 $ 552 Government-sponsored enterprise obligations — — 36,409 38 36,409 38 State and municipal obligations 15,726 9 1,551 4 17,277 13 Mortgage and asset-backed securities: Agency mortgage-backed securities 343,820 1,271 182,805 865 526,625 2,136 Non-agency mortgage-backed securities 38,085 103 311,040 928 349,125 1,031 Asset-backed securities 369,537 1,979 140,726 784 510,263 2,763 Total mortgage and asset-backed securities 751,442 3,353 634,571 2,577 1,386,013 5,930 Other debt securities — — 8,492 8 8,492 8 Total $ 857,830 $ 3,488 $ 733,953 $ 3,053 $ 1,591,783 $ 6,541 December 31, 2018 U.S. government and federal agency obligations $ 317,699 $ 6,515 $ 116,728 $ 4,864 $ 434,427 $ 11,379 Government-sponsored enterprise obligations — — 188,846 3,747 188,846 3,747 State and municipal obligations 157,838 704 257,051 4,326 414,889 5,030 Mortgage and asset-backed securities: Agency mortgage-backed securities 330,933 1,502 1,927,268 46,766 2,258,201 48,268 Non-agency mortgage-backed securities 207,506 1,085 657,685 11,694 865,191 12,779 Asset-backed securities 147,997 728 813,427 10,483 961,424 11,211 Total mortgage and asset-backed securities 686,436 3,315 3,398,380 68,943 4,084,816 72,258 Other debt securities 51,836 564 260,682 6,846 312,518 7,410 Total $ 1,213,809 $ 11,098 $ 4,221,687 $ 88,726 $ 5,435,496 $ 99,824
Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses	The following tables present 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) 2019 2018 Proceeds from sales of securities: Available for sale debt securities $ 368,939 $ 153,066 Equity securities 3,459 39,981 Other 7,243 — Total proceeds $ 379,641 $ 193,047 Investment securities gains (losses), net: Available for sale debt securities: Gains realized on sales $ 2,287 $ 430 Losses realized on sales (1,559 ) — Other-than-temporary impairment recognized on debt securities (133 ) (68 ) Equity securities: Gains realized on sales 2,865 102 Losses realized on sales — (8,917 ) Fair value adjustments, net 318 2,723 Other: Gains realized on sales 1,094 — Fair value adjustments, net (998 ) 12,371 Total investment securities gains, net $ 3,874 $ 6,641

Goodwill And Other Intangible_2

Goodwill And Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
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, 2019 December 31, 2018 (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 $ (29,366 ) $ — $ 1,904 $ 31,270 $ (28,954 ) $ — $ 2,316 Mortgage servicing rights 12,198 (4,559 ) (404 ) 7,235 10,339 (3,861 ) — 6,478 Total $ 43,468 $ (33,925 ) $ (404 ) $ 9,139 $ 41,609 $ (32,815 ) $ — $ 8,794
Schedule of Estimated Annual Amortization Expense	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, 2019 . 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) 2019 $ 1,494 2020 1,441 2021 1,210 2022 1,025 2023 851
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, 2019 are as follows: (In thousands) Goodwill Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2019 $ 138,921 $ 2,316 $ 6,478 Originations — — 1,859 Amortization — (412 ) (698 ) Impairment — — (404 ) Balance September 30, 2019 $ 138,921 $ 1,904 $ 7,235
Schedule Of Goodwill Allocated By Operating Segments	Goodwill allocated to the Company’s operating segments at September 30, 2019 and December 31, 2018 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Leases Leases (Tables)

Leases Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	The maturities of operating leases are included in the table below. (in thousands) Operating Leases (a) 2019 (excluding the nine months ended September 30, 2019) $ 1,452 2020 5,400 2021 4,579 2022 4,093 2023 3,772 After 2023 15,123 Total lease payments $ 34,419 Less: Interest (b) 7,337 Present value of lease liabilities $ 27,082 (a) Excludes $2.9 million of legally binding minimum lease payments for operating leases signed but not yet commenced. (b) Calculated using the interest rate for each lease.
Lease, Cost [Table Text Block]	The following table presents the average lease term and discount rate of operating leases. September 30, 2019 Weighted-average remaining lease term 11.8 years Weighted-average discount rate 3.72 %
Schedule of Supplemental Cash Flow Information Related to Operating Leases [Table Text Block]	Supplemental cash flow information related to operating leases is included in the table below. For the Three Months Ended September 30 For the Nine Months Ended September 30 (in thousands) 2019 2019 Operating cash paid toward lease liabilities $ 1,446 $ 4,487 Leased assets obtained in exchange for new lease liabilities $ 659 $ 2,751
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The Company adopted the new lease standard using the effective date as the date of initial application as noted above, and as required, the table below provides the disclosure for periods prior to adoption. Future minimum lease payments as of December 31, 2018 are shown below, which include leases that have not yet commenced. (in thousands) Year Ended December 31 Total 2019 $ 5,763 2020 4,817 2021 4,055 2022 3,598 2023 3,273 After 15,161 Total minimum lease payments $ 36,667
Lessor, Components of Lease Income [Table Text Block]	The following table provides the components of lease income. For the Three Months Ended September 30 For the Nine Months Ended September 30 (in thousands) 2019 2019 Direct financing and sales-type leases 6,092 17,988 Operating leases (a) 1,984 5,816 Total lease income $ 8,076 $ 23,804 (a) Includes rent of $19 thousand and $56 thousand , respectively, from Tower Properties Company, a related party, for the three and nine months ended September 30, 2019 .
Net Investment in Sales-type and Direct Financing Leases [Table Text Block]	The following table presents the components of the net investments in direct financing and sales-type leases. (in thousands) September 30, 2019 Lease payment receivable $ 710,676 Unguaranteed residual assets 54,938 Total net investments in direct financing and sales-type leases $ 765,614 Deferred origination cost 3,546 Total net investment included within business loans $ 769,160
Lessor, Schedule of Maturity of Lease Receivables [Table Text Block]	The maturities of lease receivables are included in the table below. (in thousands) Direct Financing and Sale-Type Leases Operating Leases Total 2019 (excluding the nine months ended September 30, 2019) $ 51,888 $ 1,918 $ 53,806 2020 200,390 7,057 207,447 2021 156,798 7,036 163,834 2022 117,779 13,314 131,093 2023 86,746 5,084 91,830 After 2023 160,852 13,096 173,948 Total lease receipts 774,453 $ 47,505 $ 821,958 Less: Net present value adjustment 63,777 Present value of lease receipts $ 710,676

Pension (Tables)

Pension (Tables)	9 Months Ended
	Sep. 30, 2019
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) 2019 2018 2019 2018 Service cost - benefits earned during the period $ 159 $ 127 $ 477 $ 432 Interest cost on projected benefit obligation 1,065 916 3,195 2,817 Expected return on plan assets (1,196 ) (1,067 ) (3,589 ) (3,942 ) Amortization of prior service cost (68 ) (68 ) (203 ) (203 ) Amortization of unrecognized net loss 586 592 1,757 1,776 Net periodic pension cost $ 546 $ 500 $ 1,637 $ 880

Common Stock (Tables)

Common Stock (Tables)	9 Months Ended
	Sep. 30, 2019
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 13. For the Three Months Ended September 30 For the Nine Months Ended September 30 (In thousands, except per share data) 2019 2018 2019 2018 Basic income per common share: Net income attributable to Commerce Bancshares, Inc. $ 109,242 $ 112,576 $ 314,351 $ 323,890 Less preferred stock dividends 2,250 2,250 6,750 6,750 Net income available to common shareholders 106,992 110,326 307,601 317,140 Less income allocated to nonvested restricted stock 1,040 1,161 2,996 3,421 Net income allocated to common stock $ 105,952 $ 109,165 $ 304,605 $ 313,719 Weighted average common shares outstanding 107,602 110,889 109,024 110,925 Basic income per common share $ .98 $ .99 $ 2.79 $ 2.83 Diluted income per common share: Net income available to common shareholders $ 106,992 $ 110,326 $ 307,601 $ 317,140 Less income allocated to nonvested restricted stock 1,039 1,159 2,991 3,413 Net income allocated to common stock $ 105,953 $ 109,167 $ 304,610 $ 313,727 Weighted average common shares outstanding 107,602 110,889 109,024 110,925 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 254 371 270 360 Weighted average diluted common shares outstanding 107,856 111,260 109,294 111,285 Diluted income per common share $ .98 $ .98 $ 2.79 $ 2.82

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2018
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 debt 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. Another 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. The remaining component is gains and losses in fair value on certain interest rate floors that have been designated as cash flow hedging instruments. Unrealized Gains (Losses) on Securities (1) Pension Loss Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2) Total Accumulated Other Comprehensive Income (Loss) (In thousands) OTTI Other Balance January 1, 2019 $ 3,861 $ (52,278 ) $ (23,107 ) $ 6,855 $ (64,669 ) Other comprehensive income (loss) before reclassifications to current earnings (709 ) 229,288 — 46,165 274,744 Amounts reclassified to current earnings from accumulated other comprehensive income 133 (728 ) 1,554 2,751 3,710 Current period other comprehensive income (loss), before tax (576 ) 228,560 1,554 48,916 278,454 Income tax (expense) benefit 144 (57,139 ) (388 ) (12,229 ) (69,612 ) Current period other comprehensive income (loss), net of tax (432 ) 171,421 1,166 36,687 208,842 Transfer of unrealized gain on securities for which impairment was not previously recognized 35 (35 ) — — — Balance September 30, 2019 $ 3,464 $ 119,108 $ (21,941 ) $ 43,542 $ 144,173 Balance January 1, 2018 $ 3,411 $ 30,326 $ (19,629 ) $ — $ 14,108 ASU 2018-02 Reclassification of tax rate change 715 6,359 (4,142 ) — 2,932 ASU 2016-01 Reclassification of unrealized gain on equity securities — (33,320 ) — — (33,320 ) Other comprehensive loss before reclassifications to current earnings (102 ) (166,824 ) — (1,625 ) (168,551 ) Amounts reclassified to current earnings from accumulated other comprehensive income 68 (431 ) 1,573 253 1,463 Current period other comprehensive income (loss), before tax (34 ) (167,255 ) 1,573 (1,372 ) (167,088 ) Income tax (expense) benefit 9 41,813 (393 ) 343 41,772 Current period other comprehensive income (loss), net of tax (25 ) (125,442 ) 1,180 (1,029 ) (125,316 ) Transfer of unrealized gain on securities for which impairment was not previously recognized 12 (12 ) — — — Balance September 30, 2018 $ 4,113 $ (122,089 ) $ (22,591 ) $ (1,029 ) $ (141,596 ) (1) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains, net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Schedule Of Financial Information By Segment	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 changes are reflected in prior year information presented below. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended September 30, 2019 Net interest income $ 80,111 $ 84,857 $ 11,548 $ 176,516 $ 26,996 $ 203,512 Provision for loan losses (10,757 ) (345 ) (197 ) (11,299 ) 336 (10,963 ) Non-interest income 36,049 53,462 46,410 135,921 (3,178 ) 132,743 Investment securities gains, net — — — — 4,909 4,909 Non-interest expense (73,948 ) (76,058 ) (30,538 ) (180,544 ) (10,476 ) (191,020 ) Income before income taxes $ 31,455 $ 61,916 $ 27,223 $ 120,594 $ 18,587 $ 139,181 Nine Months Ended September 30, 2019 Net interest income $ 236,215 $ 255,781 $ 35,800 $ 527,796 $ 90,838 $ 618,634 Provision for loan losses (33,061 ) (1,053 ) (165 ) (34,279 ) (953 ) (35,232 ) Non-interest income 98,840 151,655 135,774 386,269 (5,027 ) 381,242 Investment securities gains, net — — — — 3,874 3,874 Non-interest expense (223,580 ) (231,586 ) (92,647 ) (547,813 ) (24,411 ) (572,224 ) Income before income taxes $ 78,414 $ 174,797 $ 78,762 $ 331,973 $ 64,321 $ 396,294 Three Months Ended September 30, 2018 Net interest income $ 74,594 $ 87,979 $ 11,704 $ 174,277 $ 33,477 $ 207,754 Provision for loan losses (9,592 ) (166 ) 80 (9,678 ) (321 ) (9,999 ) Non-interest income 31,397 49,679 43,790 124,866 (1,152 ) 123,714 Investment securities gains, net — — — — 4,306 4,306 Non-interest expense (70,861 ) (73,696 ) (30,436 ) (174,993 ) (10,066 ) (185,059 ) Income before income taxes $ 25,538 $ 63,796 $ 25,138 $ 114,472 $ 26,244 $ 140,716 Nine Months Ended September 30, 2018 Net interest income $ 218,719 $ 255,790 $ 35,006 $ 509,515 $ 102,090 $ 611,605 Provision for loan losses (30,252 ) 322 32 (29,898 ) (540 ) (30,438 ) Non-interest income 93,729 150,535 128,794 373,058 (4,804 ) 368,254 Investment securities gains, net — — — — 6,641 6,641 Non-interest expense (212,442 ) (221,854 ) (92,546 ) (526,842 ) (22,354 ) (549,196 ) Income before income taxes $ 69,754 $ 184,793 $ 71,286 $ 325,833 $ 81,033 $ 406,866

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instrument Detail [Abstract]
Schedule Of Notional Amounts Of Derivative Instruments	(In thousands) September 30, 2019 December 31, 2018 Interest rate swaps $ 2,353,450 $ 2,006,280 Interest rate floors 1,500,000 1,000,000 Interest rate caps 59,782 62,163 Credit risk participation agreements 195,930 143,460 Foreign exchange contracts 5,481 6,206 Mortgage loan commitments 24,889 14,544 Mortgage loan forward sale contracts 4,124 5,768 Forward TBA contracts 34,500 16,500 Total notional amount $ 4,178,156 $ 3,254,921
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. Information about the valuation methods used to determine fair value is provided in Note 16 on Fair Value Measurements in the 2018 Annual Report on Form 10-K. The Company's policy is to present its derivative assets and derivative liabilities on a gross basis in its consolidated balance sheets, and these are reported in other assets and other liabilities. Effective January 2017, certain collateral posted to and from the Company's clearing counterparty has been offset against the fair values of cleared swaps, such that at September 30, 2019 in the table below, the positive fair values of cleared swaps were reduced by $207 thousand and the negative fair values of cleared swaps were reduced by $36.6 million . At December 31, 2018 , the positive fair values of cleared swaps were reduced by $8.1 million and the negative fair values of cleared swaps were reduced by $6.5 million . Asset Derivatives Liability Derivatives Sept. 30, 2019 Dec. 31, 2018 Sept. 30, 2019 Dec. 31, 2018 (In thousands ) Fair Value Fair Value Derivatives designated as hedging instruments: Interest rate floors $ 85,876 $ 29,031 $ — $ — Total derivatives designated as hedging instruments $ 85,876 $ 29,031 $ — $ — Derivative instruments not designated as hedging instruments: Interest rate swaps $ 47,894 $ 11,537 $ (11,451 ) $ (13,110 ) Interest rate caps 4 24 (4 ) (24 ) Credit risk participation agreements 192 47 (248 ) (93 ) Foreign exchange contracts 26 20 (16 ) (8 ) Mortgage loan commitments 823 536 — — Mortgage loan forward sale contracts 13 15 (5 ) (8 ) Forward TBA contracts 46 — (32 ) (178 ) Total derivatives not designated as hedging instruments $ 48,998 $ 12,179 $ (11,756 ) $ (13,421 ) Total $ 134,874 $ 41,210 $ (11,756 ) $ (13,421 )
Summary of Cash Flow Hedge Activity [Table Text Block]	The pre-tax effects of derivative instruments on the consolidated statements of income are shown in the tables below. Amount of Gain or (Loss) Recognized in OCI Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income (In thousands) Total Included Component Excluded Component Total Included Component Excluded Component For the Three Months Ended September 30, 2019 Derivatives in cash flow hedging relationships: Interest rate floors $ 17,760 $ 31,422 $ (13,662 ) Interest and fees on loans $ (1,042 ) $ — $ (1,042 ) Total $ 17,760 $ 31,422 $ (13,662 ) Total $ (1,042 ) $ — $ (1,042 ) For the Nine Months Ended September 30, 2019 Derivatives in cash flow hedging relationships: Interest rate floors $ 46,165 $ 77,559 $ (31,394 ) Interest and fees on loans $ (2,751 ) $ — $ (2,751 ) Total $ 46,165 $ 77,559 $ (31,394 ) Total $ (2,751 ) $ — $ (2,751 ) For the Three Months Ended September 30, 2018 Derivatives in cash flow hedging relationships: Interest rate floors $ (1,625 ) $ — $ (1,625 ) Interest and fees on loans $ (253 ) $ — $ (253 ) Total $ (1,625 ) $ — $ (1,625 ) Total $ (253 ) $ — $ (253 ) For the Nine Months Ended September 30, 2018 Derivatives in cash flow hedging relationships: Interest rate floors $ (1,625 ) $ — $ (1,625 ) Interest and fees on loans $ (253 ) $ — $ (253 ) Total $ (1,625 ) $ — $ (1,625 ) Total $ (253 ) $ — $ (253 )
Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income	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) 2019 2018 2019 2018 Derivative instruments: Interest rate swaps Other non-interest income $ 1,519 $ 692 $ 2,646 $ 2,924 Credit risk participation agreements Other non-interest income 37 (7 ) 78 173 Foreign exchange contracts Other non-interest income (5 ) (120 ) (2 ) 62 Mortgage loan commitments Loan fees and sales (112 ) (50 ) 287 99 Mortgage loan forward sale contracts Loan fees and sales (2 ) — 1 6 Forward TBA contracts Loan fees and sales (1,412 ) 113 (819 ) 646 Total $ 25 $ 628 $ 2,191 $ 3,910
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, 2019 Assets: Derivatives subject to master netting agreements 133,971 — 133,971 (10,081 ) (75,373 ) 48,517 Derivatives not subject to master netting agreements 903 — 903 Total derivatives 134,874 — 134,874 Liabilities: Derivatives subject to master netting agreements 11,555 — 11,555 (10,081 ) (533 ) 941 Derivatives not subject to master netting agreements 201 — 201 Total derivatives 11,756 — 11,756 December 31, 2018 Assets: Derivatives subject to master netting agreements $ 40,613 $ — $ 40,613 $ (2,992 ) $ (26,174 ) $ 11,447 Derivatives not subject to master netting agreements 597 — 597 Total derivatives 41,210 — 41,210 Liabilities: Derivatives subject to master netting agreements $ 13,333 $ — $ 13,333 $ (2,992 ) $ (261 ) $ 10,080 Derivatives not subject to master netting agreements 88 — 88 Total derivatives 13,421 — 13,421

Resale and Repurchase Agreeme_2

Resale and Repurchase Agreements (Tables)	9 Months Ended
	Sep. 30, 2019
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, 2019 Total resale agreements, subject to master netting arrangements $ 1,050,000 $ (200,000 ) $ 850,000 $ — $ (850,000 ) $ — Total repurchase agreements, subject to master netting arrangements 1,583,944 (200,000 ) 1,383,944 — (1,383,944 ) — December 31, 2018 Total resale agreements, subject to master netting arrangements $ 1,150,000 $ (450,000 ) $ 700,000 $ — $ (700,000 ) $ — Total repurchase agreements, subject to master netting arrangements 2,393,219 (450,000 ) 1,943,219 — (1,943,219 ) —
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, 2019 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 347,904 $ — $ — $ 347,904 Government-sponsored enterprise obligations 48,209 — — 48,209 Agency mortgage-backed securities 547,537 41,821 231,604 820,962 Non-agency mortgage-backed securities 127,689 — — 127,689 Asset-backed securities 67,962 45,000 40,000 152,962 Other debt securities 86,218 — — 86,218 Total repurchase agreements, gross amount recognized $ 1,225,519 $ 86,821 $ 271,604 $ 1,583,944 December 31, 2018 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 387,541 $ 150,000 $ 100,000 $ 637,541 Government-sponsored enterprise obligations 18,466 — — 18,466 Agency mortgage-backed securities 882,744 31,774 213,752 1,128,270 Non-agency mortgage-backed securities 187,740 — — 187,740 Asset-backed securities 322,680 — — 322,680 Other debt securities 98,522 — — 98,522 Total repurchase agreements, gross amount recognized $ 1,897,693 $ 181,774 $ 313,752 $ 2,393,219

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement, Noncash Expense [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, 2019 , and changes during the nine month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2019 1,180,940 $43.24 Granted 199,252 61.57 Vested (312,122 ) 33.00 Forfeited (11,894 ) 49.17 Nonvested at September 30, 2019 1,056,176 $49.65
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 $11.92 Assumptions: Dividend yield 1.7 % Volatility 19.8 % Risk-free interest rate 2.6 % Expected term 6.0 years
Summary Of SAR Activity	A summary of SAR activity during the first nine months of 2019 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, 2019 1,066,438 $40.22 Granted 186,943 61.76 Forfeited (5,383 ) 52.00 Expired (1,837 ) 38.88 Exercised (127,447 ) 34.10 Outstanding at September 30, 2019 1,118,714 $44.47 6.7 years $ 18,310

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table disaggregates non-interest income subject to ASU 2014-09 by major product line. Three Months Ended September 30 Nine Months Ended September 30 (In thousands) 2019 2018 2019 2018 Bank card transaction fees $ 44,510 $ 42,427 $ 126,800 $ 127,095 Trust fees 39,592 37,400 115,223 110,498 Deposit account charges and other fees 24,032 23,755 71,009 70,630 Consumer brokerage services 4,030 3,884 11,665 11,623 Other non-interest income 9,809 6,977 27,003 21,140 Total non-interest income from contracts with customers 121,973 114,443 351,700 340,986 Other non-interest income (a) 10,770 9,271 29,542 27,268 Total non-interest income $ 132,743 $ 123,714 $ 381,242 $ 368,254 (a) This revenue is not within the scope of ASU 2014-09, and includes fees relating to capital market activities, loan fees and sales, derivative instruments, standby letters of credit and various other transactions.
Contract with Customer, Asset and Liability [Table Text Block]	The following table presents the opening and closing receivable balances for the nine month periods ended September 30, 2019 and 2018 for the Company’s significant revenue categories subject to ASU 2014-09. (In thousands) September 30, 2019 December 31, 2018 September 30, 2018 December 31, 2017 Bank card transaction fees $ 10,871 $ 13,035 $ 10,591 $ 13,315 Trust fees 2,666 2,721 2,533 2,802 Deposit account charges and other fees 5,154 6,107 5,176 5,597 Consumer brokerage services 655 559 521 380

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Measurements [Abstract]
Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The table below presents the September 30, 2019 and December 31, 2018 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 2019 or the year ended December 31, 2018 . 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, 2019 Assets: Residential mortgage loans held for sale $ 14,393 $ — $ 14,393 $ — Available for sale debt securities: U.S. government and federal agency obligations 849,877 849,877 — — Government-sponsored enterprise obligations 168,817 — 168,817 — State and municipal obligations 1,203,495 — 1,193,598 9,897 Agency mortgage-backed securities 3,858,575 — 3,858,575 — Non-agency mortgage-backed securities 936,577 — 936,577 — Asset-backed securities 1,298,835 — 1,298,835 — Other debt securities 344,243 — 344,243 — Trading debt securities 35,918 — 35,918 — Equity securities 2,902 2,902 — — Private equity investments 93,441 — — 93,441 Derivatives * 134,874 — 133,859 1,015 Assets held in trust for deferred compensation plan 15,571 15,571 — — Total assets 8,957,518 868,350 7,984,815 104,353 Liabilities: Derivatives * 11,756 — 11,508 248 Liabilities held in trust for deferred compensation plan 15,571 15,571 — — Total liabilities $ 27,327 $ 15,571 $ 11,508 $ 248 December 31, 2018 Assets: Residential mortgage loans held for sale $ 13,529 $ — $ 13,529 $ — Available for sale debt securities: U.S. government and federal agency obligations 907,652 907,652 — — Government-sponsored enterprise obligations 195,778 — 195,778 — State and municipal obligations 1,328,039 — 1,313,881 14,158 Agency mortgage-backed securities 3,214,985 — 3,214,985 — Non-agency mortgage-backed securities 1,047,716 — 1,047,716 — Asset-backed securities 1,511,614 — 1,511,614 — Other debt securities 332,257 — 332,257 — Trading debt securities 27,059 — 27,059 — Equity securities 2,585 2,585 — — Private equity investments 85,659 — — 85,659 Derivatives * 41,210 — 40,627 583 Assets held in trust for deferred compensation plan 12,968 12,968 — — Total assets 8,721,051 923,205 7,697,446 100,400 Liabilities: Derivatives * 13,421 — 13,328 93 Liabilities held in trust for deferred compensation plan 12,968 12,968 — — Total liabilities $ 26,389 $ 12,968 $ 13,328 $ 93
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, 2019 Balance June 30, 2019 $ 11,641 $ 86,411 $ 883 $ 98,935 Total gains or losses (realized/unrealized): Included in earnings — 2,020 (75 ) 1,945 Included in other comprehensive income * (65 ) — — (65 ) Investment securities called (1,715 ) — — (1,715 ) Discount accretion 36 — — 36 Purchases of private equity investments — 5,010 — 5,010 Purchase of risk participation agreement — — 200 200 Sale of risk participation agreement — — (241 ) (241 ) Balance September 30, 2019 $ 9,897 $ 93,441 $ 767 $ 104,105 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, 2019 $ — $ 2,020 $ 860 $ 2,880 For the nine months ended September 30, 2019 Balance January 1, 2019 $ 14,158 $ 85,659 $ 490 $ 100,307 Total gains or losses (realized/unrealized): Included in earnings — (998 ) 365 (633 ) Included in other comprehensive income * 294 — — 294 Investment securities called (4,635 ) — — (4,635 ) Discount accretion 80 — — 80 Purchases of private equity investments — 14,899 — 14,899 Sale/pay down of private equity investments — (6,150 ) — (6,150 ) Capitalized interest/dividends — 31 — 31 Purchase of risk participation agreement — — 226 226 Sale of risk participation agreement — — (314 ) (314 ) Balance September 30, 2019 $ 9,897 $ 93,441 $ 767 $ 104,105 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, 2019 $ — $ (2,448 ) $ 916 $ (1,532 ) Fair Value Measurements Using (In thousands) State and Municipal Obligations Private Equity Derivatives Total For the three months ended September 30, 2018 Balance June 30, 2018 $ 15,073 $ 68,940 $ 684 $ 84,697 Total gains or losses (realized/unrealized): Included in earnings — 4,275 (58 ) 4,217 Included in other comprehensive income * 167 — — 167 Investment securities sold (518 ) — — (518 ) Discount accretion 7 — — 7 Purchases of private equity investments — 10,407 — 10,407 Purchase of risk participation agreement — — 50 50 Sale of risk participation agreement — — (31 ) (31 ) Balance September 30, 2018 $ 14,729 $ 83,622 $ 645 $ 98,996 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, 2018 $ — $ 4,275 $ 672 $ 4,947 For the nine months ended September 30, 2018 Balance January 1, 2018 $ 17,016 $ 55,752 $ 503 $ 73,271 Total gains or losses (realized/unrealized): Included in earnings — 12,371 271 12,642 Included in other comprehensive income * (79 ) — — (79 ) Investment securities sold (2,233 ) — — (2,233 ) Discount accretion 25 — — 25 Purchases of private equity investments — 15,650 — 15,650 Sale/pay down of private equity investments — (186 ) — (186 ) Capitalized interest/dividends — 35 — 35 Purchase of risk participation agreement — — 50 50 Sale of risk participation agreement — — (179 ) (179 ) Balance September 30, 2018 $ 14,729 $ 83,622 $ 645 $ 98,996 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, 2018 $ — $ 12,371 $ 852 $ 13,223
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, 2019 Total gains or losses included in earnings $ (112 ) $ 37 $ 2,020 $ 1,945 Change in unrealized gains or losses relating to assets still held at September 30, 2019 $ 823 $ 37 $ 2,020 $ 2,880 For the nine months ended September 30, 2019 Total gains or losses included in earnings $ 287 $ 78 $ (998 ) $ (633 ) Change in unrealized gains or losses relating to assets still held at September 30, 2019 $ 823 $ 93 $ (2,448 ) $ (1,532 ) For the three months ended September 30, 2018 Total gains or losses included in earnings $ (51 ) $ (7 ) $ 4,275 $ 4,217 Change in unrealized gains or losses relating to assets still held at September 30, 2018 $ 679 $ (7 ) $ 4,275 $ 4,947 For the nine months ended September 30, 2018 Total gains or losses included in earnings $ 98 $ 173 $ 12,371 $ 12,642 Change in unrealized gains or losses relating to assets still held at September 30, 2018 $ 679 $ 173 $ 12,371 $ 13,223
Summary Of Quantitative Information About Level 3 Fair Value Measurements	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 $9.9 million at September 30, 2019 , while private equity investments, included in other securities, totaled $93.4 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 3.4% - 3.8% Private equity investments Market comparable companies EBITDA multiple 4.0 - 6.0 Mortgage loan commitments Discounted cash flow Probability of funding 46.0% - 99.9% 81.4% Embedded servicing value —% - 2.3% 1.2%
Schedule Of Fair Value Disclosures Measured On Nonrecurring Basis [Table Text Block]	For assets measured at fair value on a nonrecurring basis during the first nine months of 2019 and 2018 , and still held as of September 30, 2019 and 2018 , 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, 2019 and 2018 . 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 September 30, 2019 Collateral dependent impaired loans $ 171 $ — $ — $ 171 $ (139 ) Mortgage servicing rights 7,235 — — 7,235 (404 ) Long-lived assets 820 — — 820 (318 ) September 30, 2018 Collateral dependent impaired loans $ 230 $ — $ — $ 230 $ (197 ) Mortgage servicing rights 6,008 — — 6,008 9 Long-lived assets 2,319 — — 2,319 (858 )

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Of Financial Instruments [Abstract]
Fair value of financial instruments [Table Text Block]	Carrying Amount Estimated Fair Value at September 30, 2019 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 5,393,268 $ — $ — $ 5,375,226 $ 5,375,226 Real estate - construction and land 932,737 — — 929,954 929,954 Real estate - business 2,833,146 — — 2,859,958 2,859,958 Real estate - personal 2,226,663 — — 2,228,234 2,228,234 Consumer 1,953,690 — — 1,921,227 1,921,227 Revolving home equity 349,111 — — 346,065 346,065 Consumer credit card 766,743 — — 709,327 709,327 Overdrafts 7,236 — — 5,164 5,164 Total loans 14,462,594 — — 14,375,155 14,375,155 Loans held for sale 20,064 — 20,064 — 20,064 Investment securities 8,847,734 852,779 7,836,563 158,392 8,847,734 Federal funds sold 2,850 2,850 — — 2,850 Securities purchased under agreements to resell 850,000 — — 876,225 876,225 Interest earning deposits with banks 344,129 344,129 — — 344,129 Cash and due from banks 512,254 512,254 — — 512,254 Derivative instruments 134,874 — 133,859 1,015 134,874 Assets held in trust for deferred compensation plan 15,571 15,571 — — 15,571 Total $ 25,190,070 $ 1,727,583 $ 7,990,486 $ 15,410,787 $ 25,128,856 Financial Liabilities Non-interest bearing deposits $ 6,816,527 $ 6,816,527 $ — $ — $ 6,816,527 Savings, interest checking and money market deposits 11,424,404 11,424,404 — — 11,424,404 Certificates of deposit 2,069,220 — — 2,086,278 2,086,278 Federal funds purchased 257,330 257,330 — — 257,330 Securities sold under agreements to repurchase 1,383,944 — — 1,384,859 1,384,859 Other borrowings 255,796 — 5,008 251,221 256,229 Derivative instruments 11,756 — 11,508 248 11,756 Liabilities held in trust for deferred compensation plan 15,571 15,571 — — 15,571 Total $ 22,234,548 $ 18,513,832 $ 16,516 $ 3,722,606 $ 22,252,954 Carrying Amount Estimated Fair Value at December 31, 2018 (In thousands) Level 1 Level 2 Level 3 Total Financial Assets Loans: Business $ 5,106,427 $ — $ — $ 5,017,694 $ 5,017,694 Real estate - construction and land 869,659 — — 868,274 868,274 Real estate - business 2,875,788 — — 2,846,095 2,846,095 Real estate - personal 2,127,083 — — 2,084,370 2,084,370 Consumer 1,955,572 — — 1,916,627 1,916,627 Revolving home equity 376,399 — — 365,069 365,069 Consumer credit card 814,134 — — 756,651 756,651 Overdrafts 15,236 — — 11,223 11,223 Total loans 14,140,298 — — 13,866,003 13,866,003 Loans held for sale 20,694 — 20,694 — 20,694 Investment securities 8,698,666 910,237 7,643,290 145,139 8,698,666 Federal funds sold 3,320 3,320 — — 3,320 Securities purchased under agreements to resell 700,000 — — 693,228 693,228 Interest earning deposits with banks 689,876 689,876 — — 689,876 Cash and due from banks 507,892 507,892 — — 507,892 Derivative instruments 41,210 — 40,627 583 41,210 Assets held in trust for deferred compensation plan 12,968 12,968 — — 12,968 Total $ 24,814,924 $ 2,124,293 $ 7,704,611 $ 14,704,953 $ 24,533,857 Financial Liabilities Non-interest bearing deposits $ 6,980,298 $ 6,980,298 $ — $ — $ 6,980,298 Savings, interest checking and money market deposits 11,685,239 11,685,239 — — 11,685,239 Certificates of deposit 1,658,122 — — 1,663,748 1,663,748 Federal funds purchased 13,170 13,170 — — 13,170 Securities sold under agreements to repurchase 1,943,219 — — 1,944,458 1,944,458 Other borrowings 8,702 — 7,751 951 8,702 Derivative instruments 13,421 — 13,328 93 13,421 Liabilities held in trust for deferred compensation plan 12,968 12,968 — — 12,968 Total $ 22,315,139 $ 18,691,675 $ 21,079 $ 3,609,250 $ 22,322,004

Loans And Allowance For Loan _3

Loans And Allowance For Loan Losses (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
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	$ 4,000,000,000
Loans Pledged to the Federal Reserve Bank as collateral for discount window borrowings	$ 1,600,000,000
Period after which loans are deemed in default (in days)	90 days
Effect on Interest Income Resulting From Modification to Credit Card Loans	$ (1,100,000)
Commitments to lend additional funds to customers with restructured loans	5,200,000
Fair Value of Personal Real Estate Loans Held for Sale	14,400,000
Unpaid Principal Balance on Personal Real Estate Loans Held for Sale	14,000,000
Student Loans Held for Sale, Lower of Cost or Fair Value	5,700,000
HFS Loans on non accrual status	0
HFS loans past due and still accruing	0
Foreclosed real estate	502,000	$ 1,400,000
Impaired Financing Receivable, with No Related Allowance, Allowance	0	0
Personal property acquired in repossession	$ 1,800,000	$ 2,000,000

Loans And Allowance For Loan _4

Loans And Allowance For Loan Losses (Summary Classification Of Held To Maturity Loan Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 14,462,594	$ 14,140,298
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	5,393,268	5,106,427
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	932,737	869,659
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	2,833,146	2,875,788
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	2,226,663	2,127,083
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	1,953,690	1,955,572
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	349,111	376,399
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	766,743	814,134
Overdrafts [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 7,236	$ 15,236

Loans And Allowance For Loan _5

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	$ 161,182	$ 159,532	$ 159,932	$ 159,532
Provision	10,963	9,999	35,232	30,438
Loans charged off	14,480	13,000	43,669	40,416
Less recoveries on loans	3,017	3,201	9,187	10,178
Net loan charge-offs (recoveries)	11,463	9,799	34,482	30,238
Balance at end of period	160,682	159,732	160,682	159,732
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	91,808	93,851	92,869	93,704
Provision	553	411	55	2
Loans charged off	490	485	1,436	1,213
Less recoveries on loans	199	314	582	1,598
Net loan charge-offs (recoveries)	291	171	854	(385)
Balance at end of period	92,070	94,091	92,070	94,091
Personal Banking Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	69,374	65,681	67,063	65,828
Provision	10,410	9,588	35,177	30,436
Loans charged off	13,990	12,515	42,233	39,203
Less recoveries on loans	2,818	2,887	8,605	8,580
Net loan charge-offs (recoveries)	11,172	9,628	33,628	30,623
Balance at end of period	$ 68,612	$ 65,641	$ 68,612	$ 65,641

Loans And Allowance For Loan _6

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, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, Related Allowance	$ 2,499	$ 2,696
Impaired Financing Receivable, Recorded Investment	83,682	78,616
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	158,183	157,236
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	14,378,912	14,061,682
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, Related Allowance	1,594	1,780
Impaired Financing Receivable, Recorded Investment	66,399	61,496
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	90,476	91,089
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	9,092,752	8,790,378
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, Related Allowance	905	916
Impaired Financing Receivable, Recorded Investment	17,283	17,120
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	67,707	66,147
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	$ 5,286,160	$ 5,271,304

Loans And Allowance For Loan _7

Loans And Allowance For Loan Losses (Investment In Impaired Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Abstract]
Non-accrual loans	$ 11,733	$ 12,536
Restructured loans (accruing)	71,949	66,080
Total impaired loans	$ 83,682	$ 78,616

Loans And Allowance For Loan _8

Loans And Allowance For Loan Losses (Additional Information About Impaired Loans Held) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 8,996	$ 8,725
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	15,464	14,477
Impaired Financing Receivable, with No Related Allowance, Allowance	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	74,686	69,891
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	76,519	72,597
Impaired Financing Receivable, Related Allowance	2,499	2,696
Impaired Financing Receivable, Recorded Investment	83,682	78,616
Impaired Financing Receivable, Unpaid Principal Balance	91,983	87,074
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	7,632	8,725
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	14,100	14,477
Impaired Financing Receivable, with No Related Allowance, Allowance	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	27,975	40,286
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	28,017	40,582
Impaired Financing Receivable, Related Allowance	744	1,223
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	48	416
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	52	421
Impaired Financing Receivable, Related Allowance	1	11
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,364	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,364	0
Impaired Financing Receivable, with No Related Allowance, Allowance	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	29,380	12,069
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	29,982	12,699
Impaired Financing Receivable, Related Allowance	849	546
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,736	4,461
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,922	6,236
Impaired Financing Receivable, Related Allowance	247	266
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,825	5,510
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	4,824	5,510
Impaired Financing Receivable, Related Allowance	29	38
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	36	40
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	36	40
Impaired Financing Receivable, Related Allowance	1	1
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	7,686	7,109
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	7,686	7,109
Impaired Financing Receivable, Related Allowance	$ 628	$ 611

Loans And Allowance For Loan _9

Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 11,558	$ 9,339	$ 11,955	$ 10,149
Restructured loans (accruing)	69,161	99,902	63,853	98,969
Total	80,719	109,241	75,808	109,118
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	9,655	7,477	9,881	7,888
Restructured loans (accruing)	53,517	83,493	48,248	81,543
Total	63,172	90,970	58,129	89,431
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	1,903	1,862	2,074	2,261
Restructured loans (accruing)	15,644	16,409	15,605	17,426
Total	$ 17,547	$ 18,271	$ 17,679	$ 19,687

Loans And Allowance For Loan_10

Loans And Allowance For Loan Losses (Interest Income Recognized on Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 875	$ 1,312	$ 2,618	$ 3,937
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	222	939	665	2,817
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	1	6	2	19
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	363	110	1,088	329
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	31	47	92	142
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	76	79	227	238
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	1	2	2	6
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 181	$ 129	$ 542	$ 386

Loans And Allowance For Loan_11

Loans And Allowance For Loan Losses (Aging Information On Past Due And Accruing Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	$ 14,358,064	$ 14,038,417
30 - 89 Days Past Due	76,489	72,687
90 Days Past Due and Still Accruing	16,308	16,658
Non-accrual loans	11,733	12,536
Total	14,462,594	14,140,298
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	5,393,268	5,106,427
Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	5,365,188	5,086,912
30 - 89 Days Past Due	19,334	10,057
90 Days Past Due and Still Accruing	993	473
Non-accrual loans	7,753	8,985
Total	5,393,268	5,106,427
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	932,737	869,659
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	925,805	867,692
30 - 89 Days Past Due	6,918	1,963
90 Days Past Due and Still Accruing	11	0
Non-accrual loans	3	4
Total	932,737	869,659
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	2,833,146	2,875,788
Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	2,824,165	2,867,347
30 - 89 Days Past Due	6,622	6,704
90 Days Past Due and Still Accruing	0	22
Non-accrual loans	2,359	1,715
Total	2,833,146	2,875,788
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	2,226,663	2,127,083
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	2,216,292	2,118,045
30 - 89 Days Past Due	6,354	6,041
90 Days Past Due and Still Accruing	2,399	1,165
Non-accrual loans	1,618	1,832
Total	2,226,663	2,127,083
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	1,953,690	1,955,572
Consumer [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	1,926,310	1,916,320
30 - 89 Days Past Due	25,031	35,608
90 Days Past Due and Still Accruing	2,349	3,644
Non-accrual loans	0	0
Total	1,953,690	1,955,572
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	349,111	376,399
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	347,956	374,830
30 - 89 Days Past Due	994	875
90 Days Past Due and Still Accruing	161	694
Non-accrual loans	0	0
Total	349,111	376,399
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	766,743	814,134
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	745,438	792,334
30 - 89 Days Past Due	10,910	11,140
90 Days Past Due and Still Accruing	10,395	10,660
Non-accrual loans	0	0
Total	766,743	814,134
Overdrafts [Member]
Loans And Allowance For Loan Losses [Line Items]
Total	7,236	15,236
Overdrafts [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Current or Less than 30 Days Past Due	6,910	14,937
30 - 89 Days Past Due	326	299
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	0	0
Total	$ 7,236	$ 15,236

Loans And Allowance For Loan_12

Loans And Allowance For Loan Losses (Credit Quality Of Commercial Loan Portfolio) (Details) - Commercial Portfolio Segment [Member] - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	$ 9,159,151	$ 8,851,874
Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	8,779,772	8,558,943
Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	231,526	138,153
Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	137,738	144,074
Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	10,115	10,704
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	5,393,268	5,106,427
Business [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	5,225,204	4,915,042
Business [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	86,152	84,391
Business [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	74,159	98,009
Business [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	7,753	8,985
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	932,737	869,659
Real Estate - Construction And Land [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	888,688	866,527
Real Estate - Construction And Land [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	43,155	1,917
Real Estate - Construction And Land [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	891	1,211
Real Estate - Construction And Land [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	3	4
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	2,833,146	2,875,788
Real Estate - Business [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	2,665,880	2,777,374
Real Estate - Business [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	102,219	51,845
Real Estate - Business [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	62,688	44,854
Real Estate - Business [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Commercial Loan Portfolio Gross Carrying Amount	$ 2,359	$ 1,715

Loans And Allowance For Loan_13

Loans And Allowance For Loan Losses (Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding ) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Credit Quality Personal Real Estate Loans Excluded	$ 196.1	$ 201.7
Consumer Healthcare Loans Excluded	$ 178.4	$ 170.3
Credit quality personal banking loan table percentage loans excluded	8.00%
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	1.20%	1.10%
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	2.00%	1.80%
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	10.00%	9.40%
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	28.00%	24.70%
Real Estate - Personal [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	58.80%	63.00%
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	3.00%	3.10%
Consumer [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.90%	4.80%
Consumer [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	15.80%	16.10%
Consumer [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	25.70%	25.70%
Consumer [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	50.60%	50.30%
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	1.00%	0.80%
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	2.10%	1.70%
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	9.60%	9.10%
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	22.50%	24.00%
Revolving Home Equity [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	64.80%	64.40%
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	5.40%	4.40%
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	14.40%	14.00%
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	33.20%	34.80%
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	26.80%	26.40%
Consumer Credit Card [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	20.20%	20.40%

Loans And Allowance For Loan_14

Loans And Allowance For Loan Losses Loans And Allowance For Loan Losses (Troubled Debt Restructurings by Type of Modification) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring	$ 81,502	$ 75,839
Performing/Accruing TDR - Commercial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring	56,238	50,904
Performing/Accruing TDR - Assistance programs [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring	7,988	7,410
Performing/Accruing TDR - Consumer Bankruptcy [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring	3,838	4,103
Performing/Accruing TDR - Other Consumer [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring	3,885	3,663
TDR Non-accrual loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring	$ 9,553	$ 9,759

Loans And Allowance For Loan_15

Loans And Allowance For Loan Losses (Outstanding Balance Of Loans Classified As Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	$ 81,502	$ 75,839
Balance 90 days past due at any time during previous 12 months	994
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	35,139
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]
Financing Receivable, Troubled Debt Restructuring	45
Balance 90 days past due at any time during previous 12 months	0
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	29,749
Balance 90 days past due at any time during previous 12 months	0
Personal Banking Portfolio Segment [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	4,022
Balance 90 days past due at any time during previous 12 months	353
Personal Banking Portfolio Segment [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	4,825
Balance 90 days past due at any time during previous 12 months	48
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	36
Balance 90 days past due at any time during previous 12 months	0
Personal Banking Portfolio Segment [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Troubled Debt Restructuring	7,686
Balance 90 days past due at any time during previous 12 months	$ 593

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Investment [Line Items]
Percentage decrease requiring a review for impairment	20.00%
Fair value of securities on other-than-temporary impairment watch list	$ 47,900	$ 57,700
Credit-related portion of impairments included in earnings, for securities on watch list	13,394	14,092	$ 14,129	$ 14,199
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,591,783	5,435,496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	6,541	99,824
AFS securities in loss position at period-end, change in unrealized loss	(93,300)
Securities pledged as collateral	3,900,000
Securities pledged as collateral and may be sold or re-pledged	$ 205,600
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%
U.S. Government and Federal Agency Obligations [Member]
Investment [Line Items]
U.S. Treasury inflation-protected securities held, at fair value	$ 458,600
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	143,592	434,427
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	552	11,379
State and Municipal Obligations [Member]
Investment [Line Items]
Auction rate securities held at fair value	9,900
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	17,277	414,889
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	13	5,030
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Par value securities with other-than-temporary impairment	18,400
Fair Value Securities with Other-Than-Temporary Impairment	14,000
Credit-related portion of impairments included in earnings, for securities on watch list	13,400
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	349,125	865,191
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,031	$ 12,779
Private Equity Funds [Member]
Investment [Line Items]
Other Securities Gain On Sale	1,100
Fair value adjustments, net	(1,000)
Equity Securities [Member]
Investment [Line Items]
Equity Securities, FV-NI, Realized Gain	2,900
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale Securities, Gain (Loss) realized on sales	$ 728

Investment Securities (Investme

Investment Securities (Investment Securities, At Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investment Securities [Abstract]
Debt Securities, Available-for-sale	$ 8,660,419	$ 8,538,041
Trading securities	35,918	27,059
Equity securities with a readily determinable fair value	2,902	2,585
Equtiy Securities without Readily Determinable Fair Values	1,284	1,824
Federal Reserve Bank Stock	33,770	33,498
Federal Home Loan Bank Stock	20,000	10,000
Private equity investments	93,441	85,659
Total investment securities	$ 8,847,734	$ 8,698,666

Investment Securities (Summary

Investment Securities (Summary Of Available For Sale Investment Securities By Maturity Groupings) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 8,496,993	$ 8,602,599
Debt Securities, Available-for-sale, Fair Value	8,660,419	8,538,041
U.S. Government and Federal Agency Obligations [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	826,551	914,486
Debt Securities, Available-for-sale, Fair Value	849,877	907,652
U.S. Government and Federal Agency Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	57,175
Debt Securities, Available-for-sale, Fair Value	56,726
U.S. Government and Federal Agency Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	516,924
Debt Securities, Available-for-sale, Fair Value	533,605
U.S. Government and Federal Agency Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	252,452
Debt Securities, Available-for-sale, Fair Value	259,546
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	167,683	199,470
Debt Securities, Available-for-sale, Fair Value	168,817	195,778
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	51,562
Debt Securities, Available-for-sale, Fair Value	51,551
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	55,049
Debt Securities, Available-for-sale, Fair Value	55,162
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	34,987
Debt Securities, Available-for-sale, Fair Value	35,032
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	26,085
Debt Securities, Available-for-sale, Fair Value	27,072
State and Municipal Obligations [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,163,411	1,322,785
Debt Securities, Available-for-sale, Fair Value	1,203,495	1,328,039
State and Municipal Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	57,870
Debt Securities, Available-for-sale, Fair Value	58,039
State and Municipal Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	709,484
Debt Securities, Available-for-sale, Fair Value	728,639
State and Municipal Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	354,519
Debt Securities, Available-for-sale, Fair Value	374,236
State and Municipal Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	41,538
Debt Securities, Available-for-sale, Fair Value	42,581
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,791,709	3,253,433
Debt Securities, Available-for-sale, Fair Value	3,858,575	3,214,985
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	921,080	1,053,854
Debt Securities, Available-for-sale, Fair Value	936,577	1,047,716
Asset-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,288,360	1,518,976
Debt Securities, Available-for-sale, Fair Value	1,298,835	1,511,614
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	6,001,149	5,826,263
Debt Securities, Available-for-sale, Fair Value	6,093,987	5,774,315
Other Debt Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	338,199	339,595
Debt Securities, Available-for-sale, Fair Value	344,243	$ 332,257
Other Debt Securities [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	43,894
Debt Securities, Available-for-sale, Fair Value	43,965
Other Debt Securities [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	239,692
Debt Securities, Available-for-sale, Fair Value	243,606
Other Debt Securities [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	54,613
Debt Securities, Available-for-sale, Fair Value	$ 56,672

Investment Securities (Availabl

Investment Securities (Available For Sale Securities Unrealized Gains And Losses, By Security Type) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 8,496,993	$ 8,602,599
Available For Sale Securities, Gross Unreailzed Gain at Period End	169,967	35,266
Available For Sale Securities, Gross Unrealized Loss at Period End	(6,541)	(99,824)
Debt Securities, Available-for-sale, Fair Value	8,660,419	8,538,041
U.S. Government and Federal Agency Obligations [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	826,551	914,486
Available For Sale Securities, Gross Unreailzed Gain at Period End	23,878	4,545
Available For Sale Securities, Gross Unrealized Loss at Period End	(552)	(11,379)
Debt Securities, Available-for-sale, Fair Value	849,877	907,652
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	167,683	199,470
Available For Sale Securities, Gross Unreailzed Gain at Period End	1,172	55
Available For Sale Securities, Gross Unrealized Loss at Period End	(38)	(3,747)
Debt Securities, Available-for-sale, Fair Value	168,817	195,778
State and Municipal Obligations [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,163,411	1,322,785
Available For Sale Securities, Gross Unreailzed Gain at Period End	40,097	10,284
Available For Sale Securities, Gross Unrealized Loss at Period End	(13)	(5,030)
Debt Securities, Available-for-sale, Fair Value	1,203,495	1,328,039
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,791,709	3,253,433
Available For Sale Securities, Gross Unreailzed Gain at Period End	69,002	9,820
Available For Sale Securities, Gross Unrealized Loss at Period End	(2,136)	(48,268)
Debt Securities, Available-for-sale, Fair Value	3,858,575	3,214,985
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	921,080	1,053,854
Available For Sale Securities, Gross Unreailzed Gain at Period End	16,528	6,641
Available For Sale Securities, Gross Unrealized Loss at Period End	(1,031)	(12,779)
Debt Securities, Available-for-sale, Fair Value	936,577	1,047,716
Asset-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,288,360	1,518,976
Available For Sale Securities, Gross Unreailzed Gain at Period End	13,238	3,849
Available For Sale Securities, Gross Unrealized Loss at Period End	(2,763)	(11,211)
Debt Securities, Available-for-sale, Fair Value	1,298,835	1,511,614
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	6,001,149	5,826,263
Available For Sale Securities, Gross Unreailzed Gain at Period End	98,768	20,310
Available For Sale Securities, Gross Unrealized Loss at Period End	(5,930)	(72,258)
Debt Securities, Available-for-sale, Fair Value	6,093,987	5,774,315
Other Debt Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	338,199	339,595
Available For Sale Securities, Gross Unreailzed Gain at Period End	6,052	72
Available For Sale Securities, Gross Unrealized Loss at Period End	(8)	(7,410)
Debt Securities, Available-for-sale, Fair Value	$ 344,243	$ 332,257

Investment Securities (Cash Flo

Investment Securities (Cash Flow Model Inputs Used To Calculate Credit Losses) (Details)	Sep. 30, 2019
Minimum [Member]
Investment [Line Items]
Prepayment CPR	0.00%
Projected cumulative default	6.00%
Credit support	0.00%
Loss severity	10.00%
Maximum [Member]
Investment [Line Items]
Prepayment CPR	25.00%
Projected cumulative default	52.00%
Credit support	19.00%
Loss severity	63.00%

Investment Securities (Changes

Investment Securities (Changes In Recorded Credit Losses) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
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	$ 13,394	$ 14,129	$ 14,092	$ 14,199
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	48	58
Credit losses on debt securities for which impairment was previously recognized	85	10
Increase in expected cash flows that are recognized over remaining life of security	$ (831)	$ (138)

Investment Securities (Securiti

Investment Securities (Securities With Unrealized Losses And Length Of Impairment Period) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investment [Line Items]
Less than 12 months, Fair Value	$ 857,830	$ 1,213,809
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3,488	11,098
12 months or longer, Fair Value	733,953	4,221,687
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3,053	88,726
Total, Fair Value	1,591,783	5,435,496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	6,541	99,824
U.S. Government and Federal Agency Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	90,662	317,699
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	126	6,515
12 months or longer, Fair Value	52,930	116,728
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	426	4,864
Total, Fair Value	143,592	434,427
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	552	11,379
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
12 months or longer, Fair Value	36,409	188,846
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	38	3,747
Total, Fair Value	36,409	188,846
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	38	3,747
State and Municipal Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	15,726	157,838
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	9	704
12 months or longer, Fair Value	1,551	257,051
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	4	4,326
Total, Fair Value	17,277	414,889
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	13	5,030
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	343,820	330,933
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,271	1,502
12 months or longer, Fair Value	182,805	1,927,268
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	865	46,766
Total, Fair Value	526,625	2,258,201
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,136	48,268
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	38,085	207,506
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	103	1,085
12 months or longer, Fair Value	311,040	657,685
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	928	11,694
Total, Fair Value	349,125	865,191
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,031	12,779
Asset-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	369,537	147,997
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,979	728
12 months or longer, Fair Value	140,726	813,427
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	784	10,483
Total, Fair Value	510,263	961,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,763	11,211
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	751,442	686,436
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3,353	3,315
12 months or longer, Fair Value	634,571	3,398,380
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2,577	68,943
Total, Fair Value	1,386,013	4,084,816
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	5,930	72,258
Debt Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	0	51,836
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	564
12 months or longer, Fair Value	8,492	260,682
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8	6,846
Total, Fair Value	8,492	312,518
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 8	$ 7,410

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investment [Line Items]
Proceeds from Sale of Available-for-sale Securities			$ 368,939	$ 153,066
Proceeds from Sale of Equity Securities			3,459	39,981
Proceeds From Sale Of Other Securities			7,243	0
Total proceeds			379,641	193,047
Investment securities gains (losses), net	$ 4,909	$ 4,306	3,874	6,641
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale Securities, Gains realized on sales			2,287	430
Available-for-sale Securities, Losses realized on sales			(1,559)	0
Other-than-temporary impairment recognized on debt securities			(133)	(68)
Equity Securities [Member]
Investment [Line Items]
Gain realized on sales			2,865	102
Loss realized on sales			0	(8,917)
Fair value adjustments, net			318	2,723
Other Investments [Member]
Investment [Line Items]
Other Securities Gain On Sale			1,094	0
Fair value adjustments, net			$ (998)	$ 12,371

Goodwill And Other Intangible_3

Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 395	$ 318	$ 1,100	$ 952

Goodwill And Other Intangible_4

Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Estimable Useful Lives) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 43,468	$ 41,609
Accumulated Amortization	(33,925)	(32,815)
Valuation Allowance	(404)	0
Net Amount	9,139	8,794
Core Deposit Premium [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,270	31,270
Accumulated Amortization	(29,366)	(28,954)
Valuation Allowance	0	0
Net Amount	1,904	2,316
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,198	10,339
Accumulated Amortization	(4,559)	(3,861)
Valuation Allowance	(404)	0
Net Amount	$ 7,235	$ 6,478

Goodwill And Other Intangible_5

Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 1,494
2020	1,441
2021	1,210
2022	1,025
2023	$ 851

Goodwill And Other Intangible_6

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill and Intangible Assets [Roll Forward]
Amortization	$ 395	$ 318	$ 1,100	$ 952
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			(412)
Impairment reversal			0
Intangible Assets, Net (Including Goodwill)	1,904		1,904		2,316
Mortgage Servicing Rights [Member]
Goodwill and Intangible Assets [Roll Forward]
Originations			1,859
Amortization			(698)
Impairment reversal			(404)
Intangible Assets, Net (Including Goodwill)	$ 7,235		$ 7,235		$ 6,478

Goodwill And Other Intangible_7

Goodwill And Other Intangible Assets (Schedule Of Goodwill Allocated By Operating Segments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
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, 2019	Dec. 31, 2018
Guarantor Obligations [Line Items]
Derivative Liabilities	$ 11,756	$ 13,421
Notional amount of underlying interest rate swaps associated with risk participation agreements	4,178,156	$ 3,254,921
Financial Standby Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Standby letters of credit, net liability	1,900
Contractual amount of letters of credit, guaranteed maximum potential future payments	364,400
Risk Participation Agreement [Member] | Indirect Guarantee Of Indebtedness [Member]
Guarantor Obligations [Line Items]
Derivative Liabilities	248
Notional amount of underlying interest rate swaps associated with risk participation agreements	$ 100,600
Minimum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years	1 year
Maximum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years	11 years

Leases Leases (Narrative - Less

Leases Leases (Narrative - Lessee) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 26,400	$ 26,400
Operating Lease, Present value of lease liabilities	27,082	27,082
Lease, Cost	$ 1,800	$ 5,500
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	1 month	1 month
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	35 years	35 years

Leases Leases (Schedule of Matu

Leases Leases (Schedule of Maturity of Operating Lease Liabilities) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of 2019	$ 1,452
Lessee, Operating Lease, Liability, Payments, 2020	5,400
Lessee, Operating Lease, Liability, Payments, 2021	4,579
Lessee, Operating Lease, Liability, Payments, 2022	4,093
Lessee, Operating Lease, Liability, Payments, 2023	3,772
Lessee, Operating Lease, Liability, Payments, Due after 2023	15,123
Lessee, Operating Lease, Liability, Payments, Total	34,419
Lessee, Operating Lease, Liability, Interest	7,337
Operating Lease, Present value of lease liabilities	27,082
Minimum lease payment for operating leases signed but not yet commenced	$ 2,900

Leases Leases (Schedule of Oper

Leases Leases (Schedule of Operating Lease Term and Discount Rate) (Details)	Sep. 30, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	11 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	3.72%

Leases Leases (Schedule of Supp

Leases Leases (Schedule of Supplemental Cash Flow Information Related to Operating Leases) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating Lease, Operating cash paid toward lease liabilities	$ 1,446	$ 4,487
Leased assets obtained in exchange for new lease liabilities, operating lease	$ 659	$ 2,751

Leases Leases (Summary of Minim

Leases Leases (Summary of Minimum Lease Commitments Under ASC 840) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, 2019	$ 5,763
Operating Leases, Future Minimum Payments, 2020	4,817
Operating Leases, Future Minimum Payments, 2021	4,055
Operating Leases, Future Minimum Payments, 2022	3,598
Operating Leases, Future Minimum Payments, 2023	3,273
Operating Leases, Future Minimum Payments, After 2023	15,161
Operating Leases, Future Minimum Payments Due	$ 36,667

Leases Leases (Narrative - Le_2

Leases Leases (Narrative - Lessor) (Details)	Sep. 30, 2019
Minimum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term	1 month
Maximum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term	9 years

Leases Leases (Components of Le

Leases Leases (Components of Lease Income) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Operating Lease Income [Line Items]
Sales-type and Direct Financing Leases, Lease Income	$ 6,092	$ 17,988
Operating Lease, Lease Income	1,984	5,816
Lease Income	8,076	23,804
Operating Lease Income from Related Party [Member]
Operating Lease Income [Line Items]
Operating Lease, Lease Income	$ 19	$ 56

Leases Leases (Net Investment i

Leases Leases (Net Investment in Sales-type and Direct Financing Leases) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable	$ 710,676
Sales-type and Direct Financing Leases, Unguaranteed Residual Asset	54,938
Net investment in direct financing and sales-type leases	765,614
Deferred Costs, Leasing, Net	3,546
Net Investment in Direct Financing and Sales Type Leases included within Business Loans	$ 769,160

Leases Leases (Schedule of Ma_2

Leases Leases (Schedule of Maturity of Lease Receivables) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of 2019	$ 51,888
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2020	200,390
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2021	156,798
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2022	117,779
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2023	86,746
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, After 2023	160,852
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	774,453
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	63,777
Sales-type and Direct Financing Leases, Lease Receivable	710,676
Lessor, Operating Lease, Payments to be Received, Remainder of 2019	1,918
Lessor, Operating Lease, Payments to be Received, 2020	7,057
Lessor, Operating Lease, Payments to be Received, 2021	7,036
Lessor, Operating Lease, Payments to be Received, 2022	13,314
Lessor, Operating Lease, Payments to be Received, 2023	5,084
Lessor, Operating Lease, Payments to be Received, After 2023	13,096
Lessor, Operating Lease, Payments to be Received	47,505
Lessor, Total Payments to be Received, Remainder of 2019	53,806
Lessor, Total Payments to be Received, 2020	207,447
Lessor, Total Payments to be Received, 2021	163,834
Lessor, Total Payments to be Received, 2022	131,093
Lessor, Total Payments to be Received, 2023	91,830
Lessor, Total Payments to be Received, After 2023	173,948
Lessor, Total Payments to be Received	$ 821,958

Pension Pension (Narrative) (De

Pension Pension (Narrative) (Details)	9 Months Ended
	Sep. 30, 2019USD ($)
Pension (Narrative) [Abstract]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0

Pension (Net Pension Cost) (Det

Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension [Abstract]
Service cost - benefits earned during the period	$ 159	$ 127	$ 477	$ 432
Interest cost on projected benefit obligation	1,065	916	3,195	2,817
Expected Return on Plan Assets	(1,196)	(1,067)	(3,589)	(3,942)
Amortization of Prior Service Cost	(68)	(68)	(203)	(203)
Defined Benefit Plan, Amortization of (Gain) Loss	586	592	1,757	1,776
Net periodic pension cost	$ 546	$ 500	$ 1,637	$ 880

Common Stock Common Stock (Narr

Common Stock Common Stock (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Aug. 07, 2019	Apr. 17, 2019	Dec. 31, 2018
Common Stock (Narrative) [Abstract]
Accelerated Share Repurchases, Settlement (Payment) or Receipt		$ 150
Treasury shares received in ASR		1,994,327
PercentagofTotalSharestobeDelivered		75.00%
Common Stock, Shares Authorized	140,000,000		140,000,000	120,000,000

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Commerce Bancshares, Inc.	$ 109,242	$ 112,576	$ 314,351	$ 323,890
Preferred Stock Dividends	2,250	2,250	6,750	6,750
Net Income (Loss) Available to Common Stockholders	$ 106,992	$ 110,326	$ 307,601	$ 317,140
Basic income per common share	$ 0.98	$ 0.99	$ 2.79	$ 2.83
Diluted income per common share	$ 0.98	$ 0.98	$ 2.79	$ 2.82
Basic Income Per Common Share [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Commerce Bancshares, Inc.	$ 109,242	$ 112,576	$ 314,351	$ 323,890
Preferred Stock Dividends	2,250	2,250	6,750	6,750
Net Income (Loss) Available to Common Stockholders	106,992	110,326	307,601	317,140
Less income allocated to nonvested restricted stockholders	1,040	1,161	2,996	3,421
Net income available to common stockholders	$ 105,952	$ 109,165	$ 304,605	$ 313,719
Weighted average common shares outstanding	107,602	110,889	109,024	110,925
Basic income per common share	$ 0.98	$ 0.99	$ 2.79	$ 2.83
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	$ 106,992	$ 110,326	$ 307,601	$ 317,140
Less income allocated to nonvested restricted stockholders	1,039	1,159	2,991	3,413
Net income available to common stockholders	$ 105,953	$ 109,167	$ 304,610	$ 313,727
Weighted average common shares outstanding	107,602	110,889	109,024	110,925
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	254	371	270	360
Weighted average diluted common shares outstanding	107,856	111,260	109,294	111,285
Diluted income per common share	$ 0.98	$ 0.98	$ 2.79	$ 2.82

Common Stock Common Stock (Anti

Common Stock Common Stock (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	360	92	334	219

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018		Dec. 31, 2018	Dec. 31, 2017
Accumulated other comprehensive income (loss)	$ 144,173,000		$ (141,596,000)		$ 144,173,000		$ (141,596,000)		$ (64,669,000)	$ 14,108,000
Other Comprehensive Income Before Reclassifications					274,744,000		(168,551,000)
Reclassified from Accumulated Oher Comprehensive Income					3,710,000		1,463,000
Other Comprehensive Income (Loss), before Tax					278,454,000		(167,088,000)
Other Comprehensive Income (Loss), Tax					(69,612,000)		41,772,000
Other comprehensive income (loss), net of tax	35,275,000		(32,815,000)		208,842,000		(125,316,000)
Reclassification Where Impairment Was Not Previously Recognized					0		0
Unrealized Gain Loss on Securities OTTI [Member]
Accumulated other comprehensive income (loss)	3,464,000	[1]	4,113,000	[1]	3,464,000	[1]	4,113,000	[1]	3,861,000	3,411,000
Other Comprehensive Income Before Reclassifications					(709,000)		(102,000)
Reclassified from Accumulated Oher Comprehensive Income					133,000		68,000
Other Comprehensive Income (Loss), before Tax					(576,000)		(34,000)
Other Comprehensive Income (Loss), Tax					144,000		9,000
Other comprehensive income (loss), net of tax					(432,000)		(25,000)
Reclassification Where Impairment Was Not Previously Recognized					35,000		12,000
Unrealized Gain Loss on Securities Other [Member]
Accumulated other comprehensive income (loss)	119,108,000	[1]	(122,089,000)	[1]	119,108,000	[1]	(122,089,000)	[1]	(52,278,000)	30,326,000
Other Comprehensive Income Before Reclassifications					229,288,000		(166,824,000)
Reclassified from Accumulated Oher Comprehensive Income					(728,000)		(431,000)
Other Comprehensive Income (Loss), before Tax					228,560,000		(167,255,000)
Other Comprehensive Income (Loss), Tax					(57,139,000)		41,813,000
Other comprehensive income (loss), net of tax					171,421,000		(125,442,000)
Reclassification Where Impairment Was Not Previously Recognized					(35,000)		(12,000)
Pension Loss [Member]
Accumulated other comprehensive income (loss)	(21,941,000)	[2]	(22,591,000)	[2]	(21,941,000)	[2]	(22,591,000)	[2]	(23,107,000)	(19,629,000)
Other Comprehensive Income Before Reclassifications					0		0
Reclassified from Accumulated Oher Comprehensive Income					1,554,000		1,573,000
Other Comprehensive Income (Loss), before Tax					1,554,000		1,573,000
Other Comprehensive Income (Loss), Tax					(388,000)		(393,000)
Other comprehensive income (loss), net of tax					1,166,000		1,180,000
Reclassification Where Impairment Was Not Previously Recognized					0		0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated other comprehensive income (loss)	$ 43,542,000	[2]	$ (1,029,000)	[2]	43,542,000	[2]	(1,029,000)	[2]	$ 6,855,000	$ 0
Other Comprehensive Income Before Reclassifications					46,165,000		(1,625,000)
Reclassified from Accumulated Oher Comprehensive Income					2,751,000		253,000
Other Comprehensive Income (Loss), before Tax					48,916,000		(1,372,000)
Other Comprehensive Income (Loss), Tax					(12,229,000)		343,000
Other comprehensive income (loss), net of tax					36,687,000		(1,029,000)
Reclassification Where Impairment Was Not Previously Recognized					$ 0		0
Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							2,932,000
Accounting Standards Update 2018-02 [Member] | Unrealized Gain Loss on Securities OTTI [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							715,000
Accounting Standards Update 2018-02 [Member] | Unrealized Gain Loss on Securities Other [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							6,359,000
Accounting Standards Update 2018-02 [Member] | Pension Loss [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							(4,142,000)
Accounting Standards Update 2018-02 [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							0
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							(33,320,000)
Accounting Standards Update 2016-01 [Member] | Unrealized Gain Loss on Securities OTTI [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							0
Accounting Standards Update 2016-01 [Member] | Unrealized Gain Loss on Securities Other [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							(33,320,000)
Accounting Standards Update 2016-01 [Member] | Pension Loss [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							0
Accounting Standards Update 2016-01 [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification							$ 0
[1]	The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains, net" in the consolidated statements of income.
[2]	The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.

Segments Segments (Narrative) (

Segments Segments (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)Locations	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)Locations	Sep. 30, 2018USD ($)
Segments [Abstract]
Number of Operating Segments			3
Segment Reporting Information, Intersegment Revenue | $	$ 0	$ 0	$ 0	$ 0
Number Of Locations | Locations	165		165

Segments (Schedule Of Financial

Segments (Schedule Of Financial Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Net interest income	$ 203,512	$ 207,754	$ 618,634	$ 611,605
Provision for loan losses	(10,963)	(9,999)	(35,232)	(30,438)
Non-interest income	132,743	123,714	381,242	368,254
Investment securities gains (losses), net	4,909	4,306	3,874	6,641
Non-interest expense	(191,020)	(185,059)	(572,224)	(549,196)
Income before income taxes	139,181	140,716	396,294	406,866
Consumer Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	80,111	74,594	236,215	218,719
Provision for loan losses	(10,757)	(9,592)	(33,061)	(30,252)
Non-interest income	36,049	31,397	98,840	93,729
Investment securities gains (losses), net	0	0	0	0
Non-interest expense	(73,948)	(70,861)	(223,580)	(212,442)
Income before income taxes	31,455	25,538	78,414	69,754
Commercial Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	84,857	87,979	255,781	255,790
Provision for loan losses	(345)	(166)	(1,053)	322
Non-interest income	53,462	49,679	151,655	150,535
Investment securities gains (losses), net	0	0	0	0
Non-interest expense	(76,058)	(73,696)	(231,586)	(221,854)
Income before income taxes	61,916	63,796	174,797	184,793
Wealth Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	11,548	11,704	35,800	35,006
Provision for loan losses	(197)	80	(165)	32
Non-interest income	46,410	43,790	135,774	128,794
Investment securities gains (losses), net	0	0	0	0
Non-interest expense	(30,538)	(30,436)	(92,647)	(92,546)
Income before income taxes	27,223	25,138	78,762	71,286
Segment Totals [Member]
Segment Reporting Information [Line Items]
Net interest income	176,516	174,277	527,796	509,515
Provision for loan losses	(11,299)	(9,678)	(34,279)	(29,898)
Non-interest income	135,921	124,866	386,269	373,058
Investment securities gains (losses), net	0	0	0	0
Non-interest expense	(180,544)	(174,993)	(547,813)	(526,842)
Income before income taxes	120,594	114,472	331,973	325,833
Other Elimination [Member]
Segment Reporting Information [Line Items]
Net interest income	26,996	33,477	90,838	102,090
Provision for loan losses	336	(321)	(953)	(540)
Non-interest income	(3,178)	(1,152)	(5,027)	(4,804)
Investment securities gains (losses), net	4,909	4,306	3,874	6,641
Non-interest expense	(10,476)	(10,066)	(24,411)	(22,354)
Income before income taxes	$ 18,587	$ 26,244	$ 64,321	$ 81,033

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, Notional Amount	$ 4,178,156	$ 3,254,921
Interest Rate Floor [Member]
Derivative [Line Items]
Derivative, Notional Amount	1,500,000	1,000,000
Premium paid for interest rate floor cash flow hedge	$ 31,300
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	7 years
Unrealized gain (loss) on interest rate cash flow hedges, net of tax, amount recorded in accumulated other comprehensive income	$ 58,100
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ (4,100)
Interest Rate Floor [Member] | Interest Rate Floor 1 [Member]
Derivative [Line Items]
Derivative, Floor Interest Rate	2.25%
Derivative, Effective Date	Jan. 1, 2020
Derivative, Maturity Date	Jan. 1, 2026
Interest Rate Floor [Member] | Interest Rate Floor 2 [Member]
Derivative [Line Items]
Derivative, Floor Interest Rate	2.50%
Derivative, Effective Date	Jun. 1, 2020
Derivative, Maturity Date	Jun. 1, 2026
Interest Rate Floor [Member] | Interest Rate Floor 3 [Member]
Derivative [Line Items]
Derivative, Floor Interest Rate	2.00%
Derivative, Effective Date	Dec. 15, 2020
Derivative, Maturity Date	Dec. 15, 2026
Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 2,353,450	2,006,280
Variation Margin Impact to Positive Fair Values of Cleared Swaps	(207)	(8,100)
Variation Margin Impact to Negative Fair Values of Cleared Swaps	$ (36,600)	$ (6,500)

Derivative Instruments (Schedul

Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, Notional Amount	$ 4,178,156	$ 3,254,921
Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, Notional Amount	2,353,450	2,006,280
Interest Rate Floor [Member]
Derivative [Line Items]
Derivative, Notional Amount	1,500,000	1,000,000
Interest Rate Caps [Member]
Derivative [Line Items]
Derivative, Notional Amount	59,782	62,163
Credit Risk Participation Agreements [Member]
Derivative [Line Items]
Derivative, Notional Amount	195,930	143,460
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	5,481	6,206
Mortgage Loan Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	24,889	14,544
Mortgage Loan Forward Sale Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	4,124	5,768
Forward TBA Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 34,500	$ 16,500

Derivative Instruments (Sched_2

Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Other assets	$ 134,874	$ 41,210
Derivative Liabilities	(11,756)	(13,421)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other assets	85,876	29,031
Derivative Liabilities	0	0
Designated as Hedging Instrument [Member] | Interest Rate Floor [Member]
Derivatives, Fair Value [Line Items]
Other assets	85,876	29,031
Derivative Liabilities	0	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other assets	48,998	12,179
Derivative Liabilities	(11,756)	(13,421)
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	47,894	11,537
Derivative Liabilities	(11,451)	(13,110)
Not Designated as Hedging Instrument [Member] | Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	4	24
Derivative Liabilities	(4)	(24)
Not Designated as Hedging Instrument [Member] | Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	192	47
Derivative Liabilities	(248)	(93)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	26	20
Derivative Liabilities	(16)	(8)
Not Designated as Hedging Instrument [Member] | Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	823	536
Derivative Liabilities	0	0
Not Designated as Hedging Instrument [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	13	15
Derivative Liabilities	(5)	(8)
Not Designated as Hedging Instrument [Member] | Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	46	0
Derivative Liabilities	$ (32)	$ (178)

Derivative Instruments Deriva_2

Derivative Instruments Derivative Instruments (Summary of Cash Flow Hedge Activity) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of Cash Flow Hedge Activity [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 17,760	$ (1,625)	$ 46,165	$ (1,625)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	31,422	0	77,559	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax	(13,662)	(1,625)	(31,394)	(1,625)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(1,042)	(253)	(2,751)	(253)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0	0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(1,042)	(253)	(2,751)	(253)
Interest Rate Floor [Member]
Summary of Cash Flow Hedge Activity [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	17,760	(1,625)	46,165	(1,625)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	31,422	0	77,559	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax	(13,662)	(1,625)	(31,394)	(1,625)
Interest and Fee Income on Loans [Member] | Interest Rate Floor [Member]
Summary of Cash Flow Hedge Activity [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(1,042)	(253)	(2,751)	(253)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0	0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (1,042)	$ (253)	$ (2,751)	$ (253)

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 25	$ 628	$ 2,191	$ 3,910
Other Non-Interest Income [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	1,519	692	2,646	2,924
Other Non-Interest Income [Member] | Credit Risk Participation Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	37	(7)	78	173
Other Non-Interest Income [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(5)	(120)	(2)	62
Loans Fees And Sales [Member] | Mortgage Loan Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(112)	(50)	287	99
Loans Fees And Sales [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(2)	0	1	6
Loans Fees And Sales [Member] | Forward TBA Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (1,412)	$ 113	$ (819)	$ 646

Derivative Instruments Deriva_3

Derivative Instruments Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	$ 134,874	$ 41,210
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Assets	134,874	41,210
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	11,756	13,421
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liabilities	11,756	13,421
Derivative Subject to Master Netting Agreement [Member]
Derivative Asset, Fair Value, Gross Asset	133,971	40,613
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Asset, Net Amount Presented in the Balance Sheet	133,971	40,613
Derivative Asset, Not Offset, Policy Election Deduction	(10,081)	(2,992)
derivatve asset, fair value of collateral	(75,373)	(26,174)
Derivative Asset, Fair Value, Amount Offset Against Collateral	48,517	11,447
Derivative Liability, Fair Value, Gross Liability	11,555	13,333
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Net Amount Presented in the Balance Sheet	11,555	13,333
Derivative Liability, Not Offset, Policy Election Deduction	(10,081)	(2,992)
Derivative Liability, Fair Value of Collateral	(533)	(261)
Derivative Liability, Fair Value, Amount Offset Against Collateral	941	10,080
Derivative Not Subject to Master Netting Agreement [Member]
Derivative Asset, Fair Value, Gross Asset	903	597
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Asset, Not Subject to Master Netting Arrangement	903	597
Derivative Liability, Fair Value, Gross Liability	201	88
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Not Subject to Master Netting Arrangement	$ 201	$ 88

Resale and Repurchase Agreeme_3

Resale and Repurchase Agreements Resale and Repurchase Agreements (Narrative) (Details) - Collateral Swap [Member] - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Balance Sheet Offsetting [Line Items]
Collateral Swap Agreements	$ 200	$ 450
Collateral Already Posted, Aggregate Fair Value	204.9
Collateral Accepted, Aggregate Fair Value	$ 209.8

Resale and Repurchase Agreeme_4

Resale and Repurchase Agreements Resale and Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Balance Sheet Offsetting [Line Items]
Securities purchased under agreements to resell	$ 850,000	$ 700,000
Resale agreement [Member]
Balance Sheet Offsetting [Line Items]
Securities Purchased under Agreements to Resell, Gross	1,050,000	1,150,000
Securities Purchased under Agreements to Resell, Liability	(200,000)	(450,000)
Securities purchased under agreements to resell	850,000	700,000
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	(850,000)	(700,000)
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	1,583,944	2,393,219
Securities Sold under Agreements to Repurchase, Asset	(200,000)	(450,000)
Securities Sold under Agreements to Repurchase	1,383,944	1,943,219
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	(1,383,944)	(1,943,219)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	$ 0	$ 0

Resale and Repurchase Agreeme_5

Resale and Repurchase Agreements Remaining Contractual Maturities of Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
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	$ 347,904	$ 387,541
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	150,000
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	0	100,000
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	347,904	637,541
Government-Sponsored Enterprise Obligations [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	48,209	18,466
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	0	0
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	48,209	18,466
Agency Mortgage-Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	547,537	882,744
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	41,821	31,774
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	231,604	213,752
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	820,962	1,128,270
Non Agency Mortgage Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	127,689	187,740
Non 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	0	0
Non 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	0	0
Non 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	127,689	187,740
Asset-Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	67,962	322,680
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	45,000	0
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	40,000	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	152,962	322,680
Other Debt Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	86,218	98,522
Other Debt Securities [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
Other Debt 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
Other Debt Securities [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	86,218	98,522
Repurchase Agreements [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	1,225,519	1,897,693
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	86,821	181,774
Repurchase Agreements [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	271,604	313,752
Repurchase Agreements [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 1,583,944	$ 2,393,219

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 3.5	$ 3.2	$ 10.4	$ 9.6
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, 2019$ / sharesshares
Nonvested Share Awards [Roll Forward]
Nonvested, Shares, Beginning Balance | shares	1,180,940
Granted, Shares | shares	199,252
Vested, Shares | shares	(312,122)
Forfeited, Shares | shares	(11,894)
Nonvested, Shares, Ending Balance | shares	1,056,176
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 43.24
Granted , Weighted Average Grant Date Fair Value | $ / shares	61.57
Vested , Weighted Average Grant Date Fair Value | $ / shares	33
Forfeited , Weighted Average Grant Date Fair Value | $ / shares	49.17
Nonvested , Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 49.65

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, 2019$ / 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	$ 11.92
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	1.70%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	19.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	2.60%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	6 years

Stock-Based Compensation (Sum_2

Stock-Based Compensation (Summary Of SAR Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Stock Appreciation Rights [Roll Forward]
Outstanding, Shares	1,118,714	1,066,438
Granted, Shares	186,943
Forfeited, Shares	(5,383)
Expired, Shares	(1,837)
Exercised, Shares	(127,447)
Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 40.22
Granted, Weighted Average Exercise Price	61.76
Forfeited, Weighted Average Exercise Price	52
Expired, Weighted Average Exercise Price	38.88
Exercised, Weighted Average Exercise Price	34.10
Outstanding, Weighted Average Exercise Price, Ending Balance	$ 44.47
Outstanding, Weighted Average Remaining Contractual Term (in years)	6 years 8 months 12 days
Outstanding, Aggregate Intrinsic Value, Ending Balance	$ 18,310

Revenue from Contracts with C_3

Revenue from Contracts with Customers Revenue from Contracts with Customers (Narrative) (Details)	9 Months Ended
	Sep. 30, 2019Rate
Revenue from Contract with Customer [Abstract]
Percent of Revenue not in scope of ASC 606	62.00%

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Non-interest income	$ 132,743	$ 123,714	$ 381,242	$ 368,254
Revenue from Contracts with Customers In Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	121,973	114,443	351,700	340,986
Revenue from Contracts with Customers In Scope of ASC 606 [Member] | Bank Card Transaction Fees [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	44,510	42,427	126,800	127,095
Revenue from Contracts with Customers In Scope of ASC 606 [Member] | Trust Fees [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	39,592	37,400	115,223	110,498
Revenue from Contracts with Customers In Scope of ASC 606 [Member] | Deposit Account Charges and Other Fees [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	24,032	23,755	71,009	70,630
Revenue from Contracts with Customers In Scope of ASC 606 [Member] | Consumer Brokerage Services [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	4,030	3,884	11,665	11,623
Revenue from Contracts with Customers In Scope of ASC 606 [Member] | Other Non-Interest Income [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	9,809	6,977	27,003	21,140
Revenue Not In Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Non-interest income	$ 10,770	$ 9,271	$ 29,542	$ 27,268

Revenue from Contracts with C_5

Revenue from Contracts with Customers Revenue from Contracts with Customers (Schedule of Contract with Customer, Asset and Liability) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Bank Card Transaction Fees [Member]
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	$ 10,871	$ 13,035	$ 10,591	$ 13,315
Trust Fees [Member]
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	2,666	2,721	2,533	2,802
Deposit Account Charges and Other Fees [Member]
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	5,154	6,107	5,176	5,597
Consumer Brokerage Services [Member]
Contract with Customer, Asset and Liability [Line Items]
Contract with Customer, Receivable	$ 655	$ 559	$ 521	$ 380

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Private equity investments	$ 93,441	$ 85,659
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	9,900
Private equity investments	$ 93,441	$ 85,659

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 14,393,000	$ 13,529,000
U.S. government and federal agency obligations	849,877,000	907,652,000
Government-sponsored enterprise obligations	168,817,000	195,778,000
State and municipal obligations	1,203,495,000	1,328,039,000
Agency mortgage-backed securities	3,858,575,000	3,214,985,000
Non-agency mortgage-backed securities	936,577,000	1,047,716,000
Other asset-backed securities	1,298,835,000	1,511,614,000
Other debt securities	344,243,000	332,257,000
Trading securities	35,918,000	27,059,000
Equity securities with a readily determinable fair value	2,902,000	2,585,000
Private equity investments	93,441,000	85,659,000
Derivative Assets	134,874,000	41,210,000
Assets held in trust for deferred compensation plan	15,571,000	12,968,000
Assets, Fair Value Disclosure	8,957,518,000	8,721,051,000
Derivative Liabilities	11,756,000	13,421,000
Liabilities held in trust for deferred compensation plan	15,571,000	12,968,000
Total Liabilities	27,327,000	26,389,000
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	849,877,000	907,652,000
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
Trading securities	0	0
Equity securities with a readily determinable fair value	2,902,000	2,585,000
Private equity investments	0	0
Derivative Assets	0	0
Assets held in trust for deferred compensation plan	15,571,000	12,968,000
Assets, Fair Value Disclosure	868,350,000	923,205,000
Derivative Liabilities	0	0
Liabilities held in trust for deferred compensation plan	15,571,000	12,968,000
Total Liabilities	15,571,000	12,968,000
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	14,393,000	13,529,000
U.S. government and federal agency obligations	0	0
Government-sponsored enterprise obligations	168,817,000	195,778,000
State and municipal obligations	1,193,598,000	1,313,881,000
Agency mortgage-backed securities	3,858,575,000	3,214,985,000
Non-agency mortgage-backed securities	936,577,000	1,047,716,000
Other asset-backed securities	1,298,835,000	1,511,614,000
Other debt securities	344,243,000	332,257,000
Trading securities	35,918,000	27,059,000
Equity securities with a readily determinable fair value	0	0
Private equity investments	0	0
Derivative Assets	133,859,000	40,627,000
Assets held in trust for deferred compensation plan	0	0
Assets, Fair Value Disclosure	7,984,815,000	7,697,446,000
Derivative Liabilities	11,508,000	13,328,000
Liabilities held in trust for deferred compensation plan	0	0
Total Liabilities	11,508,000	13,328,000
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	9,897,000	14,158,000
Agency mortgage-backed securities	0	0
Non-agency mortgage-backed securities	0	0
Other asset-backed securities	0	0
Other debt securities	0	0
Trading securities	0	0
Equity securities with a readily determinable fair value	0	0
Private equity investments	93,441,000	85,659,000
Derivative Assets	1,015,000	583,000
Assets held in trust for deferred compensation plan	0	0
Assets, Fair Value Disclosure	104,353,000	100,400,000
Derivative Liabilities	248,000	93,000
Liabilities held in trust for deferred compensation plan	0	0
Total Liabilities	$ 248,000	$ 93,000

Fair Value Measurements (Summ_2

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 98,935	$ 84,697	$ 100,307	$ 73,271
Total gains or losses (realized /unrealized), included in earnings	1,945	4,217	(633)	12,642
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(65)	167	294	(79)
Investment Securities Sold	0	(518)	0	(2,233)
Investment Securities Called	(1,715)	0	(4,635)	0
Discount accretion	36	7	80	25
Purchase of private equity securities	5,010	10,407	14,899	15,650
Sales And Repayments Of Private Equity Securities	0	0	(6,150)	(186)
Capitalized interest/dividends	0	0	31	35
Purchase Of Risk Participation Agreement	200	50	226	50
Sale Of Risk Participation Agreement	(241)	(31)	(314)	(179)
Ending balance	104,105	98,996	104,105	98,996
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	2,880	4,947	(1,532)	13,223
State and Municipal Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	11,641	15,073	14,158	17,016
Total gains or losses (realized /unrealized), included in earnings	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(65)	167	294	(79)
Investment Securities Sold	0	(518)	0	(2,233)
Investment Securities Called	(1,715)	0	(4,635)	0
Discount accretion	36	7	80	25
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
Purchase Of Risk Participation Agreement	0	0	0	0
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	9,897	14,729	9,897	14,729
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	86,411	68,940	85,659	55,752
Total gains or losses (realized /unrealized), included in earnings	2,020	4,275	(998)	12,371
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Investment Securities Sold	0	0	0	0
Investment Securities Called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	5,010	10,407	14,899	15,650
Sales And Repayments Of Private Equity Securities	0	0	(6,150)	(186)
Capitalized interest/dividends	0	0	31	35
Purchase Of Risk Participation Agreement	0	0	0	0
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	93,441	83,622	93,441	83,622
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	2,020	4,275	(2,448)	12,371
Derivative Level Three Unobservable Inputs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	883	684	490	503
Total gains or losses (realized /unrealized), included in earnings	(75)	(58)	365	271
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Investment Securities Sold	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
Purchase Of Risk Participation Agreement	200	50	226	50
Sale Of Risk Participation Agreement	(241)	(31)	(314)	(179)
Ending balance	767	645	767	645
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	$ 860	$ 672	$ 916	$ 852

Fair Value Measurements (Summ_3

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ 1,945	$ 4,217	$ (633)	$ 12,642
Change in unrealized gains or losses relating to assets still held	2,880	4,947	(1,532)	13,223
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	(112)	(51)	287	98
Change in unrealized gains or losses relating to assets still held	823	679	823	679
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	37	(7)	78	173
Change in unrealized gains or losses relating to assets still held	37	(7)	93	173
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	2,020	4,275	(998)	12,371
Change in unrealized gains or losses relating to assets still held	$ 2,020	$ 4,275	$ (2,448)	$ 12,371

Fair Value Measurements (Summ_4

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details)	9 Months Ended
	Sep. 30, 2019Rate
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	3.40%
Auction Rate Securities [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable Input, Estimated market rate	3.80%
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, amortization (EBITDA) 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, amortization (EBITDA) multiple	6
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	81.40%
Weighted Average, Embedded Servicing Value	1.20%
Mortgage Loan Commitments [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Probability of Funding	46.00%
Embedded Servicing Value	0.00%
Mortgage Loan Commitments [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Probability of Funding	99.90%
Embedded Servicing Value	2.30%

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, 2019	Sep. 30, 2018
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 171	$ 230
Loans Nonrecurring Basis Gains (Losses)	(139)	(197)
Mortgage servicing rights	7,235	6,008
Mortgage Servicing Rights Nonrecurring Basis Gains (Losses)	(404)	9
Long-lived assets	820	2,319
Long Lived Assets Nonrecurring Basis Gains (Losses)	(318)	(858)
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
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
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	171	230
Mortgage servicing rights	7,235	6,008
Long-lived assets	$ 820	$ 2,319

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Schedule Of Estimated Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	$ 14,400
Securities purchased under agreements to resell	850,000	$ 700,000
Interest earning deposits with banks	344,129	689,876
Cash and due from banks	512,254	507,892
Derivative Assets	134,874	41,210
Assets held in trust for deferred compensation plan	15,571	12,968
Assets, Fair Value Disclosure	8,957,518	8,721,051
Non-interest bearing deposits	6,816,527	6,980,298
Savings, interest checking and money market deposits	11,424,404	11,685,239
Other borrowings	257,383	8,702
Derivative Liabilities	11,756	13,421
Liabilities held in trust for deferred compensation plan	15,571	12,968
Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	0	0
Assets held in trust for deferred compensation plan	15,571	12,968
Assets, Fair Value Disclosure	868,350	923,205
Derivative Liabilities	0	0
Liabilities held in trust for deferred compensation plan	15,571	12,968
Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	133,859	40,627
Assets held in trust for deferred compensation plan	0	0
Assets, Fair Value Disclosure	7,984,815	7,697,446
Derivative Liabilities	11,508	13,328
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]
Derivative Assets	1,015	583
Assets held in trust for deferred compensation plan	0	0
Assets, Fair Value Disclosure	104,353	100,400
Derivative Liabilities	248	93
Liabilities held in trust for deferred compensation plan	0	0
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,462,594	14,140,298
Loans held for sale	20,064	20,694
Investments, Fair Value Disclosure	8,847,734	8,698,666
Federal funds sold	2,850	3,320
Securities purchased under agreements to resell	850,000	700,000
Interest earning deposits with banks	344,129	689,876
Cash and due from banks	512,254	507,892
Derivative Assets	134,874	41,210
Assets held in trust for deferred compensation plan	15,571	12,968
Assets, Fair Value Disclosure	25,190,070	24,814,924
Non-interest bearing deposits	6,816,527	6,980,298
Savings, interest checking and money market deposits	11,424,404	11,685,239
Certificates of deposits	2,069,220	1,658,122
Federal Funds Purchased, Fair Value Disclosure	257,330	13,170
SecuritiesSold under Agreements to Repurchase, Fair Value Disclosure	1,383,944	1,943,219
Other borrowings	255,796	8,702
Derivative Liabilities	11,756	13,421
Liabilities held in trust for deferred compensation plan	15,571	12,968
Financial Liabilities Fair Value Disclosure	22,234,548	22,315,139
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,393,268	5,106,427
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	932,737	869,659
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,833,146	2,875,788
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,226,663	2,127,083
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,953,690	1,955,572
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	349,111	376,399
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Consumer Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	766,743	814,134
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	7,236	15,236
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,375,155	13,866,003
Loans held for sale	20,064	20,694
Investments, Fair Value Disclosure	8,847,734	8,698,666
Federal funds sold	2,850	3,320
Securities purchased under agreements to resell	876,225	693,228
Interest earning deposits with banks	344,129	689,876
Cash and due from banks	512,254	507,892
Derivative Assets	134,874	41,210
Assets held in trust for deferred compensation plan	15,571	12,968
Assets, Fair Value Disclosure	25,128,856	24,533,857
Non-interest bearing deposits	6,816,527	6,980,298
Savings, interest checking and money market deposits	11,424,404	11,685,239
Certificates of deposits	2,086,278	1,663,748
Federal Funds Purchased, Fair Value Disclosure	257,330	13,170
SecuritiesSold under Agreements to Repurchase, Fair Value Disclosure	1,384,859	1,944,458
Other borrowings	256,229	8,702
Derivative Liabilities	11,756	13,421
Liabilities held in trust for deferred compensation plan	15,571	12,968
Financial Liabilities Fair Value Disclosure	22,252,954	22,322,004
Estimate of Fair Value, Fair Value Disclosure [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,375,226	5,017,694
Estimate of Fair Value, Fair Value Disclosure [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	929,954	868,274
Estimate of Fair Value, Fair Value Disclosure [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,859,958	2,846,095
Estimate of Fair Value, Fair Value Disclosure [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,228,234	2,084,370
Estimate of Fair Value, Fair Value Disclosure [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,921,227	1,916,627
Estimate of Fair Value, Fair Value Disclosure [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	346,065	365,069
Estimate of Fair Value, Fair Value Disclosure [Member] | Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	709,327	756,651
Estimate of Fair Value, Fair Value Disclosure [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,164	11,223
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Loans held for sale	0	0
Investments, Fair Value Disclosure	852,779	910,237
Federal funds sold	2,850	3,320
Securities purchased under agreements to resell	0	0
Interest earning deposits with banks	344,129	689,876
Cash and due from banks	512,254	507,892
Derivative Assets	0	0
Assets held in trust for deferred compensation plan	15,571	12,968
Assets, Fair Value Disclosure	1,727,583	2,124,293
Non-interest bearing deposits	6,816,527	6,980,298
Savings, interest checking and money market deposits	11,424,404	11,685,239
Certificates of deposits	0	0
Federal Funds Purchased, Fair Value Disclosure	257,330	13,170
SecuritiesSold under Agreements to Repurchase, Fair Value Disclosure	0	0
Other borrowings	0	0
Derivative Liabilities	0	0
Liabilities held in trust for deferred compensation plan	15,571	12,968
Financial Liabilities Fair Value Disclosure	18,513,832	18,691,675
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Loans held for sale	20,064	20,694
Investments, Fair Value Disclosure	7,836,563	7,643,290
Federal funds sold	0	0
Securities purchased under agreements to resell	0	0
Interest earning deposits with banks	0	0
Cash and due from banks	0	0
Derivative Assets	133,859	40,627
Assets held in trust for deferred compensation plan	0	0
Assets, Fair Value Disclosure	7,990,486	7,704,611
Non-interest bearing deposits	0	0
Savings, interest checking and money market deposits	0	0
Certificates of deposits	0	0
Federal Funds Purchased, Fair Value Disclosure	0	0
SecuritiesSold under Agreements to Repurchase, Fair Value Disclosure	0	0
Other borrowings	5,008	7,751
Derivative Liabilities	11,508	13,328
Liabilities held in trust for deferred compensation plan	0	0
Financial Liabilities Fair Value Disclosure	16,516	21,079
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,375,155	13,866,003
Loans held for sale	0	0
Investments, Fair Value Disclosure	158,392	145,139
Federal funds sold	0	0
Securities purchased under agreements to resell	876,225	693,228
Interest earning deposits with banks	0	0
Cash and due from banks	0	0
Derivative Assets	1,015	583
Assets held in trust for deferred compensation plan	0	0
Assets, Fair Value Disclosure	15,410,787	14,704,953
Non-interest bearing deposits	0	0
Savings, interest checking and money market deposits	0	0
Certificates of deposits	2,086,278	1,663,748
Federal Funds Purchased, Fair Value Disclosure	0	0
SecuritiesSold under Agreements to Repurchase, Fair Value Disclosure	1,384,859	1,944,458
Other borrowings	251,221	951
Derivative Liabilities	248	93
Liabilities held in trust for deferred compensation plan	0	0
Financial Liabilities Fair Value Disclosure	3,722,606	3,609,250
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	5,375,226	5,017,694
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	929,954	868,274
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	2,859,958	2,846,095
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	2,228,234	2,084,370
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	1,921,227	1,916,627
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	346,065	365,069
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	709,327	756,651
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	$ 5,164	$ 11,223