Commerce Bancshares (CBSH) 10-Q 6 Aug 15 2015 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document And Entity Information [Abstract]
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Type	10-Q
Amendment Flag	false
Document Fiscal Period Focus	Q2
Entity Registrant Name	COMMERCE BANCSHARES INC /MO/
Current Fiscal Year End Date	--12-31
Entity Central Index Key	22,356
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		93,335,596

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Loans	$ 11,928,481	$ 11,469,238
Allowance for loan losses	(151,532)	(156,532)
Net loans	11,776,949	11,312,706
Loans held for sale, at fair value	7,852	0
Investment securities:
Available for sale	9,221,821	9,523,560
Trading	18,971	15,357
Non-marketable	108,346	106,875
Total investment securities	9,349,138	9,645,792
Federal funds sold and short-term securities purchased under agreements to resell	26,875	32,485
Securities Purchased under Agreements to Resell	1,050,000	1,050,000
Interest earning deposits with banks	264,683	600,744
Cash and due from banks	409,791	467,488
Land, buildings and equipment, net	353,366	357,871
Goodwill	138,921	138,921
Other intangible assets, net	6,978	7,450
Other assets	321,382	380,823
Total assets	23,705,935	23,994,280
LIABILITIES AND EQUITY
Non-interest bearing	6,886,509	6,811,959
Savings, interest checking and money market	10,369,031	10,541,601
Time open and C.D.'s of less than $100,000	833,161	878,433
Time open and C.D.'s of $100,000 and over	1,200,008	1,243,785
Total deposits	19,288,709	19,475,778
Federal funds purchased and securities sold under agreements to repurchase	1,666,043	1,862,518
Other Borrowings	103,843	104,058
Other liabilities	331,980	217,680
Total liabilities	21,390,575	21,660,034
Commerce Bancshares, Inc. stockholders' equity:
Preferred Stock, Value, Outstanding	144,784	144,784
Common stock	484,155	484,155
Capital surplus	1,261,307	1,229,075
Retained earnings	514,451	426,648
Treasury stock, at cost	(143,565)	(16,562)
Accumulated other comprehensive income	48,789	62,093
Total Commerce Bancshares, Inc. stockholders' equity	2,309,921	2,330,193
Non-controlling interest	5,439	4,053
Total equity	2,315,360	2,334,246
Total liabilities and equity	$ 23,705,935	$ 23,994,280

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment Securities:
Available-for-sale Securities Pledged as Collateral	$ 465,491	$ 467,143
Stockholders' Equity:
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	6,000	6,000
Common stock, par value	$ 5	$ 5
Common Stock, Shares Authorized	120,000,000	120,000,000
Common stock, shares issued	96,830,977	96,830,977
Treasury stock, shares	3,362,811	367,487

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
INTEREST INCOME
Interest and fees on loans	$ 113,467	$ 111,496	$ 224,753		$ 222,198
Interest and fees on loans held for sale	39	0	60		0
Interest on investment securities	53,264	53,016	91,700		98,035
Interest on federal funds sold and short-term securities purchased under agreements to resell	15	24	24		50
Interest on long-term securities purchased under agreements to resell	3,670	2,943	6,721		7,094
Interest on deposits with banks	122	88	301		188
Total interest income	170,577	167,567	323,559		327,565
INTEREST EXPENSE
Savings, interest checking and money market	3,287	3,358	6,595		6,664
Time open and C.D.'s of less than $100,000	818	1,063	1,698		2,183
Time open and C.D.'s of $100,000 and over	1,504	1,515	2,914		2,967
Interest on federal funds purchased and securities sold under agreements to repurchase	421	263	788		466
Interest on other borrowings	890	875	1,769		1,726
Total interest expense	6,920	7,074	13,764		14,006
Net interest income	163,657	160,493	309,795		313,559
Provision for loan losses	6,757	7,555	11,177		17,215
Net interest income after provision for loan losses	156,900	152,938	298,618		296,344
NON-INTEREST INCOME
Bank card transaction fees	45,672	44,444	87,971		86,161
Trust fees	30,531	27,765	60,117		54,338
Deposit account charges and other fees	19,637	19,709	38,136		38,299
Capital market fees	2,738	3,246	5,740		7,116
Consumer brokerage services	3,364	2,972	6,552		5,719
Loan fees and sales	2,183	1,211	4,272		2,420
Other	9,967	9,416	17,730		17,337
Total non-interest income	114,092	108,763	220,518		211,390
INVESTMENT SECURITIES GAINS (LOSSES), NET
Change in fair value of other-than-temporary impaired securities	(88)	(785)	(315)		(848)
Portion recognized in other comprehensive income	(378)	154	(168)		(129)
Net impairment gains (losses) recognized in earnings	(466)	(631)	(483)		(977)
Realized gains (losses) on sales and fair value adjustments	2,609	(1,927)	8,661		8,456
Investment securities gains (losses), net	2,143	(2,558)	8,178	[1]	7,479	[1]
NON-INTEREST EXPENSE
Salaries and employee benefits	99,655	94,849	197,729		189,112
Net occupancy	10,999	11,151	22,560		22,767
Equipment	4,679	4,525	9,382		9,029
Supplies and communication	5,226	5,486	10,807		11,185
Data processing and software	21,045	19,578	40,551		38,665
Marketing	4,307	3,949	8,225		7,630
Deposit insurance	3,019	2,892	6,020		5,786
Other	16,390	20,123	33,743		40,341
Total non-interest expense	165,320	162,553	329,017		324,515
Income before income taxes	107,815	96,590	198,297		190,698
Less income taxes	32,492	30,690	60,960		60,677
Net income	75,323	65,900	137,337		130,021
Less non-controlling interest expense	970	(631)	1,929		(823)
Net income attributable to Commerce Bancshares, Inc.	74,353	66,531	135,408		130,844
Preferred Stock Dividends	2,250	0	4,500		0
Net Income (Loss) Available to Common Stockholders	$ 72,103	$ 66,531	$ 130,908		$ 130,844
Net income per common share - basic	$ 0.75	$ 0.67	$ 1.36		$ 1.31
Net income per common share - diluted	$ 0.75	$ 0.66	$ 1.36		$ 1.30
[1]	Available for sale and non-marketable securities

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 75,323	$ 65,900	$ 137,337	$ 130,021
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	149	(58)	21	108
Net unrealized gains (losses) on other securities	(43,483)	43,650	(14,137)	74,029
Pension loss amortization	406	223	812	446
Other comprehensive income (loss), net of tax	(42,928)	43,815	(13,304)	74,583
Comprehensive income	32,395	109,715	124,033	204,604
Non-controlling interest expense	970	(631)	1,929	(823)
Comprehensive income attributable to Commerce Bancshares, Inc	$ 31,425	$ 110,346	$ 122,104	$ 205,427

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Non-Controlling Interest [Member]
Balance at Dec. 31, 2013	$ 2,214,397	$ 0	$ 481,224	$ 1,279,948	$ 449,836	$ (10,097)	$ 9,731	$ 3,755
Net income	130,021				130,844			(823)
Other comprehensive income (loss)	74,583						74,583
Distributions to non-controlling interest	(554)							(554)
Issuance of preferred stock	144,816	144,816
Purchase of treasury stock	(208,989)					$ (208,989)
Accelerated share repurchase forward contract	(60,000)			$ (60,000)
Issuance of stock under purchase and equity compensation plans	5,241			(10,671)		15,912
Net tax benefit related to equity compensation plans	1,091			1,091
Stock-based compensation	4,468			4,468
Cash dividends per share, Common Stock, Cash	(42,921)				(42,921)
Balance at Jun. 30, 2014	2,262,153	144,816	$ 481,224	1,214,836	537,759	(203,174)	84,314	2,378
Balance at Dec. 31, 2014	2,334,246	144,784	484,155	1,229,075	426,648	(16,562)	62,093	4,053
Net income	137,337				135,408			1,929
Other comprehensive income (loss)	(13,304)						(13,304)
Distributions to non-controlling interest	(543)							(543)
Purchase of treasury stock	(143,575)					(143,575)
Accelerated share repurchase forward contract	(20,000)			(20,000)
Settlement of Accelerated Share Repurchase Forward Contract	(60,000)			(60,000)
Issuance of stock under purchase and equity compensation plans	1,890			(14,682)		16,572
Net tax benefit related to equity compensation plans	1,662			1,662
Stock-based compensation	5,252			5,252
Cash dividends per share, Common Stock, Cash	(43,105)				(43,105)
Dividends per share, Preferred Stock, Cash	(4,500)				(4,500)
Balance at Jun. 30, 2015	$ 2,315,360	$ 144,784	$ 484,155	$ 1,261,307	$ 514,451	$ (143,565)	$ 48,789	$ 5,439

Consolidated Statements Of Cha7

Consolidated Statements Of Changes In Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends, per share	$ 0.450	$ 0.429
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.750	$ 0

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
OPERATING ACTIVITIES:
Net income		$ 137,337	$ 130,021
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		11,177	17,215
Provision for depreciation and amortization		21,287	21,033
Amortization of investment security premiums, net		17,797	8,323
Investment securities gains (losses), net	[1]	(8,178)	(7,479)
Net gains on sales of loans held for sale		(1,234)	0
Origination Of Loans Held For Sale		(50,143)	0
Proceeds from sales of loans held for sale		43,593	0
Net decrease in trading securities		(1,310)	16,845
Stock-based compensation		5,252	4,468
(Increase) decrease in interest receivable		(618)	104
Increase (decrease) in interest payable		(201)	(11)
Increase (decrease) in income taxes payable		17,622	14,719
Net tax benefit related to equity compensation plans		(1,662)	(1,091)
Other changes, net		2,842	4,705
Net cash provided by (used in) operating activities		193,561	208,852
INVESTING ACTIVITIES:
Proceeds from sales of investment securities	[1]	683,202	63,899
Proceeds from maturities/pay downs of investment securities(A)	[1]	1,323,921	928,075
Purchases of investment securities	[1]	(1,710,977)	(1,196,956)
Net (increase) decrease in loans		(477,902)	(520,767)
Long-term securities purchased under agreements to resell		0	(250,000)
Repayments of long-term securities purchased under agreements to resell		0	450,000
Purchases of land, buildings and equipment		(15,523)	(14,583)
Sales of land, buildings and equipment		3,430	2,074
Net cash provided by (used in) investing activities		(193,849)	(538,258)
FINANCING ACTIVITIES:
Net increase (decrease) in non-interest bearing, savings, interest checking and money market deposits		34,287	(272,723)
Net increase (decrease) in time open and C.D.'s		(89,049)	252,702
Repayment of long-term securities sold under agreements to repurchase		0	(150,000)
Net increase (decrease) in federal funds purchased and short-term securities sold under agreements to repurchase		(196,475)	(42,235)
Repayment of long-term borrowings		(215)	(214)
Net increase (decrease) in other short-term borrowings		0	(2,000)
Proceeds from issuance of preferred stock		0	144,816
Purchases of treasury stock		(83,575)	(208,989)
Accelerated stock repurchase agreement		(20,000)	(60,000)
Issuance of stock under equity compensation plans		1,890	5,241
Net tax benefit related to equity compensation plans		1,662	1,091
Cash dividends paid on common stock		(43,105)	(42,921)
Cash dividends paid on preferred stock		(4,500)	0
Net cash provided by (used in) financing activities		(399,080)	(375,232)
Increase (decrease) in cash and cash equivalents		(399,368)	(704,638)
Cash and cash equivalents at beginning of year		1,100,717	1,269,514
Cash and cash equivalents at end of period		701,349	564,876
Supplemental Cash Flow Information:
Income tax payments, net		42,077	45,154
Interest paid on deposits and borrowings		13,964	13,942
Loans transferred to foreclosed real estate		2,133	3,769
Accelerated Share Repurchases, Settlement (Payment) or Receipt		$ 60,000	$ 0
[1]	Available for sale and non-marketable securities

Principles Of Consolidation And

Principles Of Consolidation And Presentation	6 Months Ended
	Jun. 30, 2015
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 2014 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 six month periods ended June 30, 2015 are not necessarily indicative of results to be attained for the full year or any other interim period. The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission. Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the Company's most recent Annual Report on Form 10-K, containing the latest audited consolidated financial statements and notes thereto. The Company invests in low-income housing partnerships which supply funds for the construction and operation of apartment complexes that provide affordable housing to lower income families. As permitted by ASU 2014-01, "Accounting for Investments in Qualified Affordable Housing Projects," issued by the Financial Accounting Standards Board, the Company adopted a new method of accounting for these investments on January 1, 2015. The new method is the practical expedient to the proportional amortization method, which allows the Company to record the amortization of its investments in income tax expense, rather than in non-interest expense. The Company made this change because it believes that presenting the investment performance net of taxes more fairly represents the economics and returns on such investments. The amortization recognized as a component of income tax expense for the six months ended June 30, 2015 was $995 thousand . As required by the ASU, all prior period information in this report has been revised to reflect the adoption, resulting in a decrease to non-interest expense and an increase to income tax expense (as originally reported) of $756 thousand for the six months ended June 30, 2014 .

Loans And Allowance For Loan Lo

Loans And Allowance For Loan Losses	6 Months Ended
	Jun. 30, 2015
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 June 30, 2015 and December 31, 2014 are as follows: (In thousands) June 30, 2015 December 31, 2014 Commercial: Business $ 4,267,997 $ 3,969,952 Real estate – construction and land 448,887 403,507 Real estate – business 2,276,231 2,288,215 Personal Banking: Real estate – personal 1,901,671 1,883,092 Consumer 1,848,457 1,705,134 Revolving home equity 430,880 430,873 Consumer credit card 750,731 782,370 Overdrafts 3,627 6,095 Total loans $ 11,928,481 $ 11,469,238 At June 30, 2015 , loans of $3.5 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 $1.3 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 six months ended June 30, 2015 and 2014 , respectively, follows: For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total Balance at beginning of period $ 88,906 $ 64,626 $ 153,532 $ 89,622 $ 66,910 $ 156,532 Provision (2,361 ) 9,118 6,757 (4,113 ) 15,290 11,177 Deductions: Loans charged off 1,408 11,297 12,705 2,132 22,873 25,005 Less recoveries on loans 1,192 2,756 3,948 2,952 5,876 8,828 Net loan charge-offs (recoveries) 216 8,541 8,757 (820 ) 16,997 16,177 Balance June 30, 2015 $ 86,329 $ 65,203 $ 151,532 $ 86,329 $ 65,203 $ 151,532 Balance at beginning of period $ 97,881 $ 63,651 $ 161,532 $ 94,189 $ 67,343 $ 161,532 Provision 486 7,069 7,555 4,553 12,662 17,215 Deductions: Loans charged off 1,218 11,752 12,970 2,348 24,503 26,851 Less recoveries on loans 1,779 3,636 5,415 2,534 7,102 9,636 Net loan charge-offs (recoveries) (561 ) 8,116 7,555 (186 ) 17,401 17,215 Balance June 30, 2014 $ 98,928 $ 62,604 $ 161,532 $ 98,928 $ 62,604 $ 161,532 The following table shows the balance in the allowance for loan losses and the related loan balance at June 30, 2015 and December 31, 2014 , disaggregated on the basis of impairment methodology. Impaired loans evaluated under ASC 310-10-35 include loans on non-accrual status, which are individually evaluated for impairment, and other impaired loans discussed below, which are deemed to have similar risk characteristics and are collectively evaluated. All other loans are collectively evaluated for impairment under ASC 450-20. Impaired Loans All Other Loans (In thousands) Allowance for Loan Losses Loans Outstanding Allowance for Loan Losses Loans Outstanding June 30, 2015 Commercial $ 1,943 $ 31,276 $ 84,386 $ 6,961,839 Personal Banking 1,813 24,300 63,390 4,911,066 Total $ 3,756 $ 55,576 $ 147,776 $ 11,872,905 December 31, 2014 Commercial $ 4,527 $ 55,551 $ 85,095 $ 6,606,123 Personal Banking 2,314 25,537 64,596 4,782,027 Total $ 6,841 $ 81,088 $ 149,691 $ 11,388,150 Impaired loans The table below shows the Company’s investment in impaired loans at June 30, 2015 and December 31, 2014 . 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 under ASC 310-40. These restructured loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. They are discussed further in the "Troubled debt restructurings" section on page 14. (In thousands) June 30, 2015 Dec. 31, 2014 Non-accrual loans $ 26,645 $ 40,775 Restructured loans (accruing) 28,931 40,313 Total impaired loans $ 55,576 $ 81,088 The following table provides additional information about impaired loans held by the Company at June 30, 2015 and December 31, 2014 , 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 June 30, 2015 With no related allowance recorded: Business $ 9,779 $ 11,911 $ — Real estate – construction and land 3,102 8,554 — Real estate – business 2,213 3,629 — Real estate – personal 618 815 — $ 15,712 $ 24,909 $ — With an allowance recorded: Business $ 7,303 $ 9,408 $ 836 Real estate – construction and land 3,658 5,129 321 Real estate – business 5,221 9,299 786 Real estate – personal 8,710 11,832 1,030 Consumer 5,378 5,492 91 Revolving home equity 523 523 21 Consumer credit card 9,071 9,071 671 $ 39,864 $ 50,754 $ 3,756 Total $ 55,576 $ 75,663 $ 3,756 December 31, 2014 With no related allowance recorded: Business $ 9,237 $ 11,532 $ — Real estate – construction and land 4,552 8,493 — Real estate – business 13,453 17,258 — Revolving home equity 1,227 1,384 — $ 28,469 $ 38,667 $ — With an allowance recorded: Business $ 12,326 $ 13,846 $ 1,844 Real estate – construction and land 8,148 9,610 1,081 Real estate – business 7,835 15,025 1,602 Real estate – personal 9,096 12,465 1,441 Consumer 4,244 4,244 50 Revolving home equity 529 529 9 Consumer credit card 10,441 10,441 814 $ 52,619 $ 66,160 $ 6,841 Total $ 81,088 $ 104,827 $ 6,841 Total average impaired loans for the three and six month periods ended June 30, 2015 and 2014 , respectively, are shown in the table below. (In thousands) Commercial Personal Banking Total Average Impaired Loans: For the three months ended June 30, 2015 Non-accrual loans $ 25,063 $ 5,948 $ 31,011 Restructured loans (accruing) 14,254 18,968 33,222 Total $ 39,317 $ 24,916 $ 64,233 For the six months ended June 30, 2015 Non-accrual loans $ 28,155 $ 6,102 $ 34,257 Restructured loans (accruing) 18,245 19,176 37,421 Total $ 46,400 $ 25,278 $ 71,678 For the three months ended June 30, 2014 Non-accrual loans $ 35,908 $ 7,131 $ 43,039 Restructured loans (accruing) 40,167 20,745 60,912 Total $ 76,075 $ 27,876 $ 103,951 For the six months ended June 30, 2014 Non-accrual loans $ 38,093 $ 7,347 $ 45,440 Restructured loans (accruing) 39,285 21,086 60,371 Total $ 77,378 $ 28,433 $ 105,811 The table below shows interest income recognized during the three and six month periods ended June 30, 2015 and 2014 , respectively, for impaired loans held at the end of each respective period. This interest all relates to accruing restructured loans, as discussed in the "Troubled debt restructurings" section on page 14. For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2015 2014 2015 2014 Interest income recognized on impaired loans: Business $ 42 $ 181 $ 84 $ 361 Real estate – construction and land 42 142 84 283 Real estate – business 15 46 30 91 Real estate – personal 48 58 96 115 Consumer 85 71 169 142 Revolving home equity 6 7 11 14 Consumer credit card 179 228 357 456 Total $ 417 $ 733 $ 831 $ 1,462 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 June 30, 2015 and December 31, 2014 . (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 June 30, 2015 Commercial: Business $ 4,252,087 $ 3,643 $ 411 $ 11,856 $ 4,267,997 Real estate – construction and land 438,905 4,903 1,479 3,600 448,887 Real estate – business 2,264,297 6,291 — 5,643 2,276,231 Personal Banking: Real estate – personal 1,885,544 8,480 2,201 5,446 1,901,671 Consumer 1,832,142 14,179 2,036 100 1,848,457 Revolving home equity 427,644 1,912 1,324 — 430,880 Consumer credit card 736,213 7,751 6,767 — 750,731 Overdrafts 3,345 282 — — 3,627 Total $ 11,840,177 $ 47,441 $ 14,218 $ 26,645 $ 11,928,481 December 31, 2014 Commercial: Business $ 3,946,144 $ 11,152 $ 1,096 $ 11,560 $ 3,969,952 Real estate – construction and land 397,488 827 35 5,157 403,507 Real estate – business 2,266,688 3,661 — 17,866 2,288,215 Personal Banking: Real estate – personal 1,868,606 6,618 1,676 6,192 1,883,092 Consumer 1,687,285 16,053 1,796 — 1,705,134 Revolving home equity 428,478 1,552 843 — 430,873 Consumer credit card 764,599 9,559 8,212 — 782,370 Overdrafts 5,721 374 — — 6,095 Total $ 11,365,009 $ 49,796 $ 13,658 $ 40,775 $ 11,469,238 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 June 30, 2015 Pass $ 4,179,038 $ 439,769 $ 2,210,059 $ 6,828,866 Special mention 46,321 1,111 15,842 63,274 Substandard 30,782 4,407 44,687 79,876 Non-accrual 11,856 3,600 5,643 21,099 Total $ 4,267,997 $ 448,887 $ 2,276,231 $ 6,993,115 December 31, 2014 Pass $ 3,871,569 $ 385,831 $ 2,184,541 $ 6,441,941 Special mention 62,904 3,865 40,668 107,437 Substandard 23,919 8,654 45,140 77,713 Non-accrual 11,560 5,157 17,866 34,583 Total $ 3,969,952 $ 403,507 $ 2,288,215 $ 6,661,674 The credit quality of Personal Banking loans is monitored primarily on the basis of aging/delinquency, and this information is provided in the table in the above "Delinquent and non-accrual loans" section. In addition, FICO scores are obtained and updated on a quarterly basis for most of the loans in the Personal Banking portfolio. This is a published credit score designed to measure the risk of default by taking into account various factors from a borrower's financial history. The Bank normally obtains a FICO score at the loan's origination and renewal dates, and updates are obtained on a quarterly basis. Excluded from the table below are certain Personal Banking loans for which FICO scores are not obtained because they generally pertain to commercial customer activities and are often underwritten with other collateral considerations. At June 30, 2015 , these were comprised of $246.3 million in personal real estate loans, or 5.0% of the Personal Banking portfolio, compared to $244.3 million at December 31, 2014 . For the remainder of loans in the Personal Banking portfolio, the table below shows the percentage of balances outstanding at June 30, 2015 and December 31, 2014 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card June 30, 2015 FICO score: Under 600 1.6 % 4.8 % 1.8 % 3.9 % 600 - 659 3.2 9.7 3.9 11.7 660 - 719 9.7 22.5 13.3 32.4 720 - 779 26.8 26.9 25.7 28.0 780 and over 58.7 36.1 55.3 24.0 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2014 FICO score: Under 600 1.4 % 5.2 % 1.8 % 4.1 % 600 - 659 3.1 10.2 4.4 11.8 660 - 719 9.9 22.9 13.7 32.4 720 - 779 26.7 28.0 32.8 27.8 780 and over 58.9 33.7 47.3 23.9 Total 100.0 % 100.0 % 100.0 % 100.0 % Troubled debt restructurings As mentioned previously, the Company's impaired loans include loans which have been classified as troubled debt restructurings. Total restructured loans amounted to $45.4 million at June 30, 2015 . Restructured loans are those extended to borrowers who are experiencing financial difficulty and who have been granted a concession. Restructured loans are placed on non-accrual status if the Company does not believe it probable that amounts due under the contractual terms will be collected, and those non-accrual loans totaled $16.4 million at June 30, 2015 . Other performing restructured loans totaled $28.9 million at June 30, 2015 . These include certain business, construction and business real estate loans classified as substandard. Upon maturity, the loans renewed at interest rates judged not to be market rates for new debt with similar risk and as a result the loans were classified as troubled debt restructurings. These commercial loans totaled $10.9 million at June 30, 2015 . These restructured loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. Troubled debt restructurings also include certain credit card loans under various debt management and assistance programs, which totaled $9.1 million at June 30, 2015 . Modifications to credit card loans generally involve removing the available line of credit, placing loans on amortizing status, and lowering the contractual interest rate. The Company has classified additional loans as troubled debt restructurings because they were not reaffirmed by the borrower in bankruptcy proceedings. At June 30, 2015 , these loans totaled $8.5 million in personal real estate, revolving home equity, and consumer loans. Interest on these loans is being recognized on an accrual basis, as the borrowers are continuing to make payments under the terms of the loan agreements. The following table shows the outstanding balances of loans classified as troubled debt restructurings at June 30, 2015 , 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) June 30, 2015 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 14,945 $ — Real estate - construction and land 6,418 181 Real estate - business 3,495 — Personal Banking: Real estate - personal 5,606 192 Consumer 5,303 84 Revolving home equity 523 91 Consumer credit card 9,071 693 Total restructured loans $ 45,361 $ 1,241 For those loans on non-accrual status also classified as restructured, the modification did not create any further financial effect on the Company as those loans were already recorded at net realizable value. For those performing commercial loans classified as restructured, there were no concessions involving forgiveness of principal or interest and, therefore, there was no financial impact to the Company as a result of modification to these loans. No financial impact resulted from those performing loans where the debt was not reaffirmed in bankruptcy, as no changes to loan terms occurred in that process. The effects of modifications to consumer credit card loans were estimated to decrease interest income by approximately $1.0 million on an annual, pre-tax basis, compared to amounts contractually owed. The allowance for loan losses related to troubled debt restructurings on non-accrual status is determined by individual evaluation, including collateral adequacy, using the same process as loans on non-accrual status which are not classified as troubled debt restructurings. Those performing loans classified as troubled debt restructurings are accruing loans which management expects to collect under contractual terms. Performing commercial loans have had no other concessions granted other than being renewed at an interest rate judged not to be market. As such, they have similar risk characteristics as non-troubled debt commercial loans and are collectively evaluated based on internal risk rating, loan type, delinquency, historical experience and current economic factors. Performing personal banking loans classified as troubled debt restructurings resulted from the borrower not reaffirming the debt during bankruptcy and have had no other concession granted, other than the Bank's future limitations on collecting payment deficiencies or in pursuing foreclosure actions. As such, they have similar risk characteristics as non-troubled debt personal banking loans and are evaluated collectively based on loan type, delinquency, historical experience and current economic factors. If a troubled debt restructuring defaults and is already on non-accrual status, the allowance for loan losses continues to be based on individual evaluation, using discounted expected cash flows or the fair value of collateral. If an accruing troubled debt restructuring defaults, the loan's risk rating is downgraded to non-accrual status and the loan's related allowance for loan losses is determined based on individual evaluation, or if necessary, the loan is charged off and collection efforts begun. The Company had commitments of $2.2 million at June 30, 2015 to lend additional funds to borrowers with restructured loans. Loans held for sale Beginning January 1, 2015, certain long-term fixed rate personal real estate loan originations have been designated as held for sale, and the Company has elected the fair value option for these loans. The election of the fair value option aligns the accounting for these loans with the related economic hedges discussed in Note 10. At June 30, 2015 , the fair value of these loans was $7.9 million , and the unpaid principal balance was $7.8 million . The unrealized gain in fair value was recognized in loan fees and sales in the consolidated statement of income. None of these loans were on non-accrual status or 90 days or more past due. Interest income with respect to loans held for sale is accrued based on the principal amount outstanding and the loan's contractual interest rate. Foreclosed real estate/repossessed assets The Company’s holdings of foreclosed real estate totaled $4.2 million and $5.5 million at June 30, 2015 and December 31, 2014 , respectively. Personal property acquired in repossession, generally autos and marine and recreational vehicles, totaled $2.8 million and $2.4 million at June 30, 2015 and December 31, 2014 , respectively. These assets are carried at the lower of the amount recorded at acquisition date or the current fair value less estimated costs to sell.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2015
Investment Securities [Abstract]
Investment Securities	Investment Securities Investment securities, at fair value, consisted of the following at June 30, 2015 and December 31, 2014 . (In thousands) June 30, 2015 Dec. 31, 2014 Available for sale $ 9,221,821 $ 9,523,560 Trading 18,971 15,357 Non-marketable 108,346 106,875 Total investment securities $ 9,349,138 $ 9,645,792 Most of the Company’s investment securities are classified as available for sale, and this portfolio is discussed in more detail below. Securities which are classified as non-marketable include Federal Home Loan Bank (FHLB) stock and Federal Reserve Bank stock held for debt and regulatory purposes, which totaled $46.7 million at June 30, 2015 and $46.6 million at December 31, 2014 . Investment in Federal Reserve Bank stock is based on the capital structure of the investing bank, and investment in FHLB stock is tied to the level of borrowings from the FHLB. Non-marketable securities also include private equity investments, which amounted to $61.3 million at June 30, 2015 and $60.2 million at December 31, 2014 . A summary of the available for sale investment securities by maturity groupings as of June 30, 2015 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. 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 $ 90,775 $ 91,331 After 1 but within 5 years 167,145 174,685 After 5 but within 10 years 117,077 119,760 After 10 years 52,624 49,090 Total U.S. government and federal agency obligations 427,621 434,866 Government-sponsored enterprise obligations: Within 1 year 43,033 43,300 After 1 but within 5 years 481,824 484,932 After 5 but within 10 years 357,783 352,912 After 10 years 5,630 5,357 Total government-sponsored enterprise obligations 888,270 886,501 State and municipal obligations: Within 1 year 139,111 139,708 After 1 but within 5 years 657,544 673,868 After 5 but within 10 years 851,707 848,846 After 10 years 159,222 154,679 Total state and municipal obligations 1,807,584 1,817,101 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,531,365 2,587,693 Non-agency mortgage-backed securities 682,114 690,938 Asset-backed securities 2,494,905 2,498,506 Total mortgage and asset-backed securities 5,708,384 5,777,137 Other debt securities: Within 1 year 3,999 4,063 After 1 but within 5 years 62,023 62,069 After 5 but within 10 years 191,771 187,374 After 10 years 12,000 11,601 Total other debt securities 269,793 265,107 Equity securities 5,678 41,109 Total available for sale investment securities $ 9,107,330 $ 9,221,821 Investments in U.S. government and federal agency obligations are comprised mainly of U.S. Treasury inflation-protected securities, which totaled $434.8 million , at fair value, at June 30, 2015 . 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 $92.9 million , at fair value, of auction rate securities, which were previously purchased from bank customers. Included in equity securities is common and preferred stock held by the holding company, Commerce Bancshares, Inc. (the Parent), with a fair value of $41.1 million at June 30, 2015 . For securities classified as available for sale, the following table shows the unrealized gains and losses (pre-tax) in accumulated other comprehensive income, by security type. (In thousands) Amortized Cost Gross Gross Fair Value June 30, 2015 U.S. government and federal agency obligations $ 427,621 $ 11,597 $ (4,352 ) $ 434,866 Government-sponsored enterprise obligations 888,270 4,462 (6,231 ) 886,501 State and municipal obligations 1,807,584 22,700 (13,183 ) 1,817,101 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,531,365 63,083 (6,755 ) 2,587,693 Non-agency mortgage-backed securities 682,114 11,079 (2,255 ) 690,938 Asset-backed securities 2,494,905 7,410 (3,809 ) 2,498,506 Total mortgage and asset-backed securities 5,708,384 81,572 (12,819 ) 5,777,137 Other debt securities 269,793 416 (5,102 ) 265,107 Equity securities 5,678 35,431 — 41,109 Total $ 9,107,330 $ 156,178 $ (41,687 ) $ 9,221,821 December 31, 2014 U.S. government and federal agency obligations $ 497,336 $ 9,095 $ (5,024 ) $ 501,407 Government-sponsored enterprise obligations 968,574 2,593 (8,040 ) 963,127 State and municipal obligations 1,789,215 32,340 (8,354 ) 1,813,201 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,523,377 75,923 (5,592 ) 2,593,708 Non-agency mortgage-backed securities 372,911 11,061 (1,228 ) 382,744 Asset-backed securities 3,090,174 6,922 (5,103 ) 3,091,993 Total mortgage and asset-backed securities 5,986,462 93,906 (11,923 ) 6,068,445 Other debt securities 140,784 420 (2,043 ) 139,161 Equity securities 3,931 34,288 — 38,219 Total $ 9,386,302 $ 172,642 $ (35,384 ) $ 9,523,560 The Company’s impairment policy requires a review of all securities for which fair value is less than amortized cost. Special emphasis and analysis is placed on securities whose credit rating has fallen below A3 (Moody's) or A- (Standard & Poor's), whose fair values have fallen more than 20% below purchase price for an extended period of time, or have been identified based on management’s judgment. These securities are placed on a watch list, and for all such securities, detailed cash flow models are prepared which use inputs specific to each security. Inputs to these models include factors such as cash flow received, contractual payments required, and various other information related to the underlying collateral (including current delinquencies), collateral loss severity rates (including loan to values), expected delinquency rates, credit support from other tranches, and prepayment speeds. Stress tests are performed at varying levels of delinquency rates, prepayment speeds and loss severities in order to gauge probable ranges of credit loss. At June 30, 2015 , the fair value of securities on this watch list was $109.2 million compared to $123.9 million at December 31, 2014 . As of June 30, 2015 , the Company had recorded other-than-temporary impairment (OTTI) on certain non-agency mortgage-backed securities, part of the watch list mentioned above, which had an aggregate fair value of $50.7 million . The cumulative credit-related portion of the impairment on these securities, which was recorded in earnings, totaled $14.2 million . The Company does not intend to sell these securities and believes it is not likely that it will be required to sell the securities before the recovery of their amortized cost. The credit-related portion of the loss on these securities was based on the cash flows projected to be received over the estimated life of the securities, discounted to present value, and compared to the current amortized cost bases of the securities. Significant inputs to the cash flow models used to calculate the credit losses on these securities at June 30, 2015 included the following: Significant Inputs Range Prepayment CPR 1% - 25% Projected cumulative default 18% - 54% Credit support 0% - 20% Loss severity 21% - 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 Six Months Ended June 30 (In thousands) 2015 2014 Cumulative OTTI credit losses at January 1 $ 13,734 $ 12,499 Credit losses on debt securities for which impairment was not previously recognized 76 — Credit losses on debt securities for which impairment was previously recognized 407 977 Increase in expected cash flows that are recognized over remaining life of security (51 ) (66 ) Cumulative OTTI credit losses at June 30 $ 14,166 $ 13,410 Securities with unrealized losses recorded in accumulated other comprehensive income are shown in the table below, along with the length of the impairment period. Less than 12 months 12 months or longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses June 30, 2015 U.S. government and federal agency obligations $ 24,495 $ 482 $ 31,984 $ 3,870 $ 56,479 $ 4,352 Government-sponsored enterprise obligations 193,644 882 157,187 5,349 350,831 6,231 State and municipal obligations 515,521 5,907 124,227 7,276 639,748 13,183 Mortgage and asset-backed securities: Agency mortgage-backed securities 214,715 1,417 315,002 5,338 529,717 6,755 Non-agency mortgage-backed securities 369,784 1,861 54,265 394 424,049 2,255 Asset-backed securities 806,300 1,259 144,478 2,550 950,778 3,809 Total mortgage and asset-backed securities 1,390,799 4,537 513,745 8,282 1,904,544 12,819 Other debt securities 202,489 3,998 25,411 1,104 227,900 5,102 Total $ 2,326,948 $ 15,806 $ 852,554 $ 25,881 $ 3,179,502 $ 41,687 December 31, 2014 U.S. government and federal agency obligations $ 90,261 $ 818 $ 32,077 $ 4,206 $ 122,338 $ 5,024 Government-sponsored enterprise obligations 224,808 922 224,779 7,118 449,587 8,040 State and municipal obligations 172,980 646 215,702 7,708 388,682 8,354 Mortgage and asset-backed securities: Agency mortgage-backed securities 55,128 429 381,617 5,163 436,745 5,592 Non-agency mortgage-backed securities 141,655 609 43,659 619 185,314 1,228 Asset-backed securities 1,424,457 2,009 159,098 3,094 1,583,555 5,103 Total mortgage and asset-backed securities 1,621,240 3,047 584,374 8,876 2,205,614 11,923 Other debt securities 16,434 55 80,203 1,988 96,637 2,043 Total $ 2,125,723 $ 5,488 $ 1,137,135 $ 29,896 $ 3,262,858 $ 35,384 The total available for sale portfolio consisted of approximately 2,000 individual securities at June 30, 2015 . The portfolio included 514 securities, having an aggregate fair value of $3.2 billion , that were in an unrealized loss position at June 30, 2015 , compared to 363 securities, with a fair value of $3.3 billion , at December 31, 2014 . The total amount of unrealized losses on these securities increased $6.3 million to $41.7 million at June 30, 2015 . At June 30, 2015 , the fair value of securities in an unrealized loss position for 12 months or longer totaled $852.6 million , or 9.2% of the total portfolio value, and did not include any securities identified as other-than-temporarily impaired. The Company’s holdings of state and municipal obligations included gross unrealized losses of $13.2 million at June 30, 2015 . Of these losses, $6.0 million related to auction rate securities and $7.2 million related to other state and municipal obligations. This portfolio, exclusive of auction rate securities, totaled $1.7 billion at fair value, or 18.7% of total available for sale securities. The average credit quality of the portfolio, excluding auction rate securities, is Aa2 as rated by Moody’s. The portfolio is diversified in order to reduce risk, and information about the top five largest holdings, by state and economic sector, is shown in the table below. The Company has processes and procedures in place to monitor its holdings, identify signs of financial distress and, if necessary, exit its positions in a timely manner. % of Portfolio Average Life (in years) Average Rating (Moody’s) At June 30, 2015 Texas 12.6 % 5.8 Aa2 Florida 7.7 4.0 Aa3 Ohio 6.5 5.7 Aa2 New York 6.2 6.4 Aa2 Washington 5.3 5.1 Aa2 General obligation 34.7 % 5.6 Aa2 Lease 19.1 5.6 Aa3 Housing 12.5 3.8 Aa1 Transportation 12.1 4.8 A1 Limited tax 8.4 6.6 Aa2 The following table presents proceeds from sales of securities and the components of investment securities gains and losses which have been recognized in earnings. For the Six Months Ended June 30 (In thousands) 2015 2014 Proceeds from sales of available for sale securities $ 675,870 $ 30,998 Proceeds from sales of non-marketable securities 7,332 32,901 Total proceeds $ 683,202 $ 63,899 Available for sale: Gains realized on sales $ 2,813 $ — Losses realized on sales — (5,197 ) Gain realized on donation — 1,570 Other-than-temporary impairment recognized on debt securities (483 ) (977 ) Non-marketable: Gains realized on sales 1,673 1,472 Losses realized on sales — (134 ) Fair value adjustments, net 4,175 10,745 Investment securities gains, net $ 8,178 $ 7,479 At June 30, 2015 , securities totaling $4.6 billion in fair value were pledged to secure public fund deposits, securities sold under agreements to repurchase, trust funds, and borrowings at the Federal Reserve Bank and FHLB. Securities pledged under agreements pursuant to which the collateral may be sold or re-pledged by the secured parties approximated $465.5 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	6 Months Ended
	Jun. 30, 2015
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. June 30, 2015 December 31, 2014 (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 $ (25,534 ) $ — $ 5,736 $ 31,270 $ (24,698 ) $ — $ 6,572 Mortgage servicing rights 4,113 (2,827 ) (44 ) 1,242 3,693 (2,718 ) (97 ) 878 Total $ 35,383 $ (28,361 ) $ (44 ) $ 6,978 $ 34,963 $ (27,416 ) $ (97 ) $ 7,450 Aggregate amortization expense on intangible assets was $472 thousand and $549 thousand , respectively, for the three month periods ended June 30, 2015 and 2014 , and $945 thousand and $1.1 million for the six month periods ended June 30, 2015 and 2014 . 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 June 30, 2015 . 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) 2015 $ 1,713 2016 1,339 2017 1,004 2018 762 2019 629 Changes in the carrying amount of goodwill and net other intangible assets for the six month period ended June 30, 2015 is as follows. (In thousands) Goodwill Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2015 $ 138,921 $ 6,572 $ 878 Originations — — 420 Amortization — (836 ) (109 ) Impairment reversal — — 53 Balance June 30, 2015 $ 138,921 $ 5,736 $ 1,242 Goodwill allocated to the Company’s operating segments at June 30, 2015 and December 31, 2014 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Guarantees

Guarantees	6 Months Ended
	Jun. 30, 2015
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 June 30, 2015 , that net liability was $3.4 million , which will be accreted into income over the remaining life of the respective commitments. The contractual amount of these letters of credit, which represents the maximum potential future payments guaranteed by the Company, was $330.4 million at June 30, 2015 . The Company periodically enters into 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 June 30, 2015 , believes sufficient collateral is available to cover potential swap losses. The RPAs are carried at fair value throughout their term with all changes in fair value, including those due to a change in the third party’s creditworthiness, recorded in current earnings. The terms of the RPAs, which correspond to the terms of the underlying swaps, range from 3 to 11 years. At June 30, 2015 , the fair value of the Company's guarantee liabilities for RPAs was $177 thousand , and the notional amount of the underlying swaps was $67.8 million . The maximum potential future payment guaranteed by the Company cannot be readily estimated but is dependent upon the fair value of the interest rate swaps at the time of default.

Pension

Pension	6 Months Ended
	Jun. 30, 2015
Pension [Abstract]
Pension	Pension The amount of net pension cost is shown in the table below: For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2015 2014 2015 2014 Service cost - benefits earned during the period $ 126 $ 133 $ 252 $ 266 Interest cost on projected benefit obligation 1,216 1,262 2,432 2,523 Expected return on plan assets (1,523 ) (1,561 ) (3,046 ) (3,122 ) Amortization of unrecognized net loss 654 360 1,309 720 Net periodic pension cost $ 473 $ 194 $ 947 $ 387 Substantially all benefits accrued under the Company’s defined benefit pension plan were frozen effective January 1, 2005, and the remaining benefits were frozen effective January 1, 2011. During the first six months of 2015 , the Company made no funding contributions to its defined benefit pension plan and made minimal funding contributions to a supplemental executive retirement plan (the CERP), which carries no segregated assets. The Company has no plans to make any further contributions, other than those related to the CERP, during the remainder of 2015 .

Common Stock

Common Stock	6 Months Ended
	Jun. 30, 2015
Common Stock [Abstract]
Common Stock	Common and Preferred Stock * Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that contain nonforfeitable rights to dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 12. For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands, except per share data) 2015 2014 2015 2014 Basic income per common share: Net income attributable to Commerce Bancshares, Inc. $ 74,353 $ 66,531 $ 135,408 $ 130,844 Less preferred stock dividends 2,250 — 4,500 — Net income available to common shareholders 72,103 66,531 130,908 130,844 Less income allocated to nonvested restricted stock 997 856 1,793 1,658 Net income allocated to common stock $ 71,106 $ 65,675 $ 129,115 $ 129,186 Weighted average common shares outstanding 94,380 98,206 94,832 98,855 Basic income per common share $ .75 $ .67 $ 1.36 $ 1.31 Diluted income per common share: Net income available to common shareholders $ 72,103 $ 66,531 $ 130,908 $ 130,844 Less income allocated to nonvested restricted stock 995 854 1,789 1,653 Net income allocated to common stock $ 71,108 $ 65,677 $ 129,119 $ 129,191 Weighted average common shares outstanding 94,380 98,206 94,832 98,855 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 322 403 311 423 Weighted average diluted common shares outstanding 94,702 98,609 95,143 99,278 Diluted income per common share $ .75 $ .66 $ 1.36 $ 1.30 Unexercised stock options and stock appreciation rights of 359 thousand and 138 thousand were excluded in the computation of diluted income per common share for the six month periods ended June 30, 2015 and 2014 , respectively, because their inclusion would have been anti-dilutive. On June 19, 2014, t he Company issued and sold 6,000,000 depositary shares, representing 6,000 shares of 6.00% Series B Non-Cumulative Perpetual Preferred Stock, par value $1.00 per share, having an aggregate liquidation preference of $150.0 million (“Series B Preferred Stock”). Each depositary share has a liquidation preference of $25 per share. Dividends on the Series B Preferred Stock, if declared, accrue and are payable quarterly, in arrears, at a rate of 6.00%. The Series B Preferred Stock qualifies as Tier 1 capital for the purposes of the regulatory capital calculations. In the event that the Company does not declare and pay dividends on the Series B Preferred Stock for the most recent dividend period, the ability of the Company to declare or pay dividends on, purchase, redeem or otherwise acquire shares of its common stock or any securities of the Company that rank junior to the Series B Preferred Stock is subject to certain restrictions under the terms of the Series B Preferred Stock. The net proceeds from the issuance and sale of the Series B Preferred Stock, totaling approximately $144.8 million , were used to fund an accelerated share repurchase (ASR) program. Under this ASR agreement, the Company paid $200.0 million to Morgan Stanley & Co. LLC (Morgan Stanley) and received from Morgan Stanley 3,208,206 shares of the Company’s common stock on June 20, 2014. Final settlement occurred on June 24, 2015, at which time the remaining shares, totaling 1,480,378 , were received by the Company. The specific number of shares that the Company ultimately repurchased was based on the volume-weighted-average price per share of the Company's common stock during the repurchase period. The Company entered into a second ASR agreement on May 21, 2015, under which it paid $100.0 million to Morgan Stanley and received from Morgan Stanley 1,803,427 shares of common stock, representing approximately 80% of the estimated total number of shares to be delivered by Morgan Stanley at the conclusion of the program. Upon final settlement, which is expected to occur in November 2015, the Company expects to receive the balance of the shares. * All prior year share and per share amounts in this note have been restated for the 5% common stock dividend distributed in December 2014.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The table below shows the activity and accumulated balances for components of other comprehensive income. The largest component is the unrealized holding gains and losses on available for sale securities. Unrealized gains and losses on debt securities for which an other-than-temporary impairment (OTTI) has been recorded in current earnings are shown separately below. The other component is the amortization from other comprehensive income of losses associated with pension benefits, which occurs as the losses are included in current net periodic pension cost. Unrealized Gains (Losses) on Securities (1) Pension Loss (2) Total Accumulated Other Comprehensive Income (In thousands) OTTI Other Balance January 1, 2015 $ 3,791 $ 81,310 $ (23,008 ) $ 62,093 Other comprehensive income (loss) before reclassifications (449 ) (19,988 ) — (20,437 ) Amounts reclassified from accumulated other comprehensive income 483 (2,813 ) 1,309 (1,021 ) Current period other comprehensive income (loss), before tax 34 (22,801 ) 1,309 (21,458 ) Income tax (expense) benefit (13 ) 8,664 (497 ) 8,154 Current period other comprehensive income (loss), net of tax 21 (14,137 ) 812 (13,304 ) Transfer of unrealized gain on securities for which impairment was not previously recognized 43 (43 ) — — Balance June 30, 2015 $ 3,855 $ 67,130 $ (22,196 ) $ 48,789 Balance January 1, 2014 $ 4,203 $ 21,303 $ (15,775 ) $ 9,731 Other comprehensive income (loss) before reclassifications (803 ) 115,774 — 114,971 Amounts reclassified from accumulated other comprehensive income 977 3,627 720 5,324 Current period other comprehensive income, before tax 174 119,401 720 120,295 Income tax expense (66 ) (45,372 ) (274 ) (45,712 ) Current period other comprehensive income, net of tax 108 74,029 446 74,583 Balance June 30, 2014 $ 4,311 $ 95,332 $ (15,329 ) $ 84,314 (1) The pre-tax amounts reclassified from accumulated other comprehensive income are included in "investment securities gains (losses), net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income are included in the computation of net periodic pension cost as "amortization of unrecognized net loss" (see Note 6), for inclusion in the consolidated statements of income.

Segments

Segments	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segments	Segments The Company segregates financial information for use in assessing its performance and allocating resources among three operating segments: Consumer, Commercial and Wealth. The Consumer segment includes the consumer portion of the retail branch network (loans, deposits, and other personal banking services), indirect and other consumer financing, and consumer debit and credit bank cards. The Commercial segment provides corporate lending (including the Small Business Banking product line within the branch network), leasing, international services, and business, government deposit, and related commercial cash management services, as well as merchant and commercial bank card products. The Commercial segment includes the Capital Markets Group, which sells fixed income securities and provides investment safekeeping and bond accounting services. The Wealth segment provides traditional trust and estate tax planning, advisory and discretionary investment management, and brokerage services, and includes the Private Banking product portfolio. Effective January 1, 2015, certain personal real estate loans, which are held for investment and totaled approximately $340 million , were removed from the Consumer segment. These loans were transferred to the "Other/Elimination" category, outside of segment totals. Management's performance evaluation of the residential mortgage business within the Consumer segment is based on originations and sales of mortgages and the related fees. Information for prior periods presented below have been revised to reflect the transfer of the held for investment loans and their related income and expense, in order to provide comparable data. 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. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended June 30, 2015 Net interest income $ 66,517 $ 73,631 $ 10,739 $ 150,887 $ 12,770 $ 163,657 Provision for loan losses (8,572 ) (201 ) 1 (8,772 ) 2,015 (6,757 ) Non-interest income 30,206 49,618 34,737 114,561 (469 ) 114,092 Investment securities gains, net — — — — 2,143 2,143 Non-interest expense (67,587 ) (65,714 ) (27,004 ) (160,305 ) (5,015 ) (165,320 ) Income before income taxes $ 20,564 $ 57,334 $ 18,473 $ 96,371 $ 11,444 $ 107,815 Six Months Ended June 30, 2015 Net interest income $ 132,182 $ 144,378 $ 21,530 $ 298,090 $ 11,705 $ 309,795 Provision for loan losses (16,895 ) 676 8 (16,211 ) 5,034 (11,177 ) Non-interest income 56,600 97,199 68,294 222,093 (1,575 ) 220,518 Investment securities gains, net — — — — 8,178 8,178 Non-interest expense (134,250 ) (130,317 ) (54,287 ) (318,854 ) (10,163 ) (329,017 ) Income before income taxes $ 37,637 $ 111,936 $ 35,545 $ 185,118 $ 13,179 $ 198,297 Three Months Ended June 30, 2014 Net interest income $ 66,440 $ 71,301 $ 9,991 $ 147,732 $ 12,761 $ 160,493 Provision for loan losses (8,312 ) 323 533 (7,456 ) (99 ) (7,555 ) Non-interest income 28,825 47,533 31,507 107,865 898 108,763 Investment securities losses, net — — — — (2,558 ) (2,558 ) Non-interest expense (66,366 ) (63,048 ) (23,991 ) (153,405 ) (9,148 ) (162,553 ) Income before income taxes $ 20,587 $ 56,109 $ 18,040 $ 94,736 $ 1,854 $ 96,590 Six Months Ended June 30, 2014 Net interest income $ 131,968 $ 142,387 $ 19,902 $ 294,257 $ 19,302 $ 313,559 Provision for loan losses (17,510 ) (60 ) 492 (17,078 ) (137 ) (17,215 ) Non-interest income 54,632 94,637 61,502 210,771 619 211,390 Investment securities gains, net — — — — 7,479 7,479 Non-interest expense (131,320 ) (124,681 ) (48,773 ) (304,774 ) (19,741 ) (324,515 ) Income before income taxes $ 37,770 $ 112,283 $ 33,123 $ 183,176 $ 7,522 $ 190,698 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 policies, which have been developed to reflect the underlying economics of the businesses. The policies address the methodologies 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	6 Months Ended
	Jun. 30, 2015
Derivative Instrument Detail [Abstract]
Derivative Instruments	Derivative Instruments The notional amounts of the Company’s derivative instruments are shown in the table below. These contractual amounts, along with other terms of the derivative, are used to determine amounts to be exchanged between counterparties and are not a measure of loss exposure. The Company’s derivative instruments are accounted for as free-standing derivatives, and changes in their fair value are recorded in current earnings. (In thousands) June 30, 2015 December 31, 2014 Interest rate swaps $ 874,809 $ 647,709 Interest rate caps 49,914 53,587 Credit risk participation agreements 75,484 75,943 Foreign exchange contracts 13,047 19,791 Mortgage loan commitments 13,683 — Mortgage loan forward sale contracts 6,267 — Forward TBA contracts 13,000 — Total notional amount $ 1,046,204 $ 797,030 The largest group of notional amounts relate to interest rate swap contracts sold to commercial customers who wish to modify their interest rate sensitivity. These swaps are offset by matching contracts purchased by the Company from other financial dealer institutions. Contracts with dealers that require central clearing are novated to a clearing agency who becomes the Company's counterparty. Because of the matching terms of the offsetting contracts, in addition to collateral provisions which mitigate the impact of non-performance risk, changes in fair value subsequent to initial recognition have a minimal effect on earnings. Many of the Company’s interest rate swap contracts with large financial institutions contain contingent features relating to debt ratings or capitalization levels. Under these provisions, if the Company’s debt rating falls below investment grade or if the Company ceases to be “well-capitalized” under risk-based capital guidelines, certain counterparties can require immediate and ongoing collateralization on interest rate swaps in net liability positions or instant settlement of the contracts. The Company maintains debt ratings and capital well above these minimum requirements. The banking customer counterparties are engaged in a variety of businesses, including real estate and building materials, manufacturing, education, communications, retail product distribution, and retirement communities. At June 30, 2015 , the largest potential loss exposures were in the groups related to education, real estate, and distribution. If the counterparties in these groups failed to perform, and if the underlying collateral proved to be of no value, the Company estimates that it would incur losses of $ 1.1 million (education), $ 3.8 million (real estate), and $ 1.6 million (distribution) at June 30, 2015 . The Company also contracts with other financial institutions, as a guarantor or beneficiary, to share credit risk associated with certain interest rate swaps through risk participation agreements. The Company’s risks and responsibilities as guarantor are further discussed in Note 5 on Guarantees. In addition, the Company enters into foreign exchange contracts, which are mainly comprised of contracts to purchase or deliver foreign currencies for customers at specific future dates. In 2015, the Company initiated a program of secondary market sales of residential mortgage loans and has designated certain newly-originated residential mortgage loans as held for sale. Derivative instruments arising from this activity include mortgage loan commitments and forward sale commitments. Changes in the fair values of the loan commitments and funded loans prior to sale that are due to changes in interest rates are economically hedged with forward contracts to sell residential mortgage-backed securities in the to-be-announced (TBA) market. These forward contracts are also considered to be derivatives and are settled in cash at the security settlement date. The fair values of the Company's derivative instruments, whose notional amounts are listed above, are shown in the table below. Derivative instruments with a positive fair value (asset derivatives) are reported in other assets in the consolidated balance sheets, while derivative instruments with a negative fair value (liability derivatives) are reported in other liabilities in the consolidated balance sheets. Information about the valuation methods used to determine fair value is provided in Note 13 on Fair Value Measurements. Asset Derivatives Liability Derivatives June 30, 2015 Dec. 31, 2014 June 30, 2015 Dec. 31, 2014 (In thousands ) Fair Value Fair Value Derivative instruments: Interest rate swaps $ 10,067 $ 10,144 $ (10,067 ) $ (10,166 ) Interest rate caps 30 62 (30 ) (62 ) Credit risk participation agreements 2 3 (177 ) (226 ) Foreign exchange contracts 109 248 (33 ) (494 ) Mortgage loan commitments 353 — (8 ) — Mortgage loan forward sale contracts 14 — (13 ) — Forward TBA contracts 46 — (20 ) — Total $ 10,621 $ 10,457 $ (10,348 ) $ (10,948 ) The effects of derivative instruments on the consolidated statements of income are shown in the table below. Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2015 2014 2015 2014 Derivative instruments: Interest rate swaps Other non-interest income $ 1,627 $ 366 $ 2,810 $ 811 Credit risk participation agreements Other non-interest income 75 93 48 198 Foreign exchange contracts Other non-interest income 761 128 322 (42 ) Mortgage loan commitments Loan fees and sales (63 ) — 345 — Mortgage loan forward sale contracts Loan fees and sales 4 — 1 — Forward TBA contracts Loan fees and sales 390 — 385 — Total $ 2,794 $ 587 $ 3,911 $ 967 The following table shows the extent to which assets and liabilities relating to derivative instruments have been offset in the consolidated balance sheets. They also provide 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 these tables 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 tables were transacted under master netting arrangements that contain a conditional right of offset, such as close-out netting, upon default. The Company is party to master netting arrangements with most of its swap derivative counterparties; however, the Company does not offset derivative assets and liabilities under these arrangements on its consolidated balance sheet. Collateral, usually in the form of marketable securities, is exchanged between the Company and dealer bank counterparties and is generally subject to thresholds and transfer minimums. By contract, it may be sold or re-pledged by the secured party until recalled at a subsequent valuation date by the pledging party. For those swap transactions requiring central clearing, the Company posts cash and securities to its clearing agency. At June 30, 2015 , the Company had a net liability position with dealer bank and clearing agency counterparties totaling $7.0 million , and had posted securities with a fair value of $3.4 million and cash totaling $9.9 million . Collateral positions are valued daily, and adjustments to amounts received and pledged by the Company are made as appropriate to maintain proper collateralization for these transactions. Swap derivative transactions with customers are generally secured by rights to non-financial collateral, such as real and personal property, which is not shown in the table below. Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Collateral Received/Pledged Net Amount June 30, 2015 Assets: Derivatives subject to master netting agreements $ 10,145 $ — $ 10,145 $ (45 ) $ — $ 10,100 Derivatives not subject to master netting agreements 476 — 476 Total derivatives 10,621 — 10,621 Liabilities: Derivatives subject to master netting agreements $ 10,294 $ — $ 10,294 $ (45 ) $ (7,580 ) $ 2,669 Derivatives not subject to master netting agreements 54 — 54 Total derivatives 10,348 — 10,348 December 31, 2014 Assets: Derivatives subject to master netting agreements $ 10,209 $ — $ 10,209 $ (251 ) $ — $ 9,958 Derivatives not subject to master netting agreements 248 — 248 Total derivatives 10,457 — 10,457 Liabilities: Derivatives subject to master netting agreements $ 10,454 $ — $ 10,454 $ (251 ) $ (8,738 ) $ 1,465 Derivatives not subject to master netting agreements 494 — 494 Total derivatives 10,948 — 10,948

Resale and Repurchase Agreement

Resale and Repurchase Agreements (Notes)	6 Months Ended
	Jun. 30, 2015
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 balance sheet, as permitted under the netting provisions of ASC 210-20-45. The collateral swaps totaled $450.0 million at both June 30, 2015 and December 31, 2014 . At June 30, 2015 , the Company had posted collateral of $462.0 million in marketable securities, consisting mainly of agency mortgage-backed bonds, and had accepted $490.7 million in investment grade asset-backed, commercial mortgage-backed, and corporate bonds. Gross Amounts Not Offset in the Balance Sheet (In thousands) Gross Amount Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Securities Collateral Received/Pledged Net Amount June 30, 2015 Total resale agreements, subject to master netting arrangements $ 1,500,000 $ (450,000 ) $ 1,050,000 $ — $ (1,050,000 ) $ — Total repurchase agreements, subject to master netting arrangements 2,115,693 (450,000 ) 1,665,693 — (1,665,693 ) — December 31, 2014 Total resale agreements, subject to master netting arrangements $ 1,500,000 $ (450,000 ) $ 1,050,000 $ — $ (1,049,370 ) $ 630 Total repurchase agreements, subject to master netting arrangements 2,308,678 (450,000 ) 1,858,678 — (1,858,678 ) — The table below shows the remaining contractual maturities of repurchase agreements outstanding at June 30 2015, in addition to the various types of marketable securities that have been pledged as collateral for these borrowings. Remaining Contractual Maturity of the Agreements (In thousands) Overnight and continuous Up to 90 days Greater than 90 days Total June 30, 2015 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 124,241 $ 24,799 $ 10,219 $ 159,259 Government-sponsored enterprise obligations 349,799 41,830 22,122 413,751 Agency mortgage-backed securities 340,790 103,537 324,659 768,986 Asset-backed securities 653,697 120,000 — 773,697 Total repurchase agreements, gross amount recognized $ 1,468,527 $ 290,166 $ 357,000 $ 2,115,693

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2015
Share-based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company has historically issued stock-based compensation in the form of nonvested restricted stock, stock options and stock appreciation rights (SARs). During the first six months of 2015 , stock-based compensation was issued in the form of nonvested restricted stock and SARs. The stock-based compensation expense that has been charged against income was $2.5 million and $2.2 million in the three month periods ended June 30, 2015 and 2014 , respectively, and $5.3 million and $4.5 million in the six months ended June 30, 2015 and 2014 , respectively. Nonvested stock awards generally vest in 4 to 7 years and contain restrictions as to transferability, sale, pledging, or assigning, among others, prior to the end of the vesting period. Dividend and voting rights are conferred upon grant. A summary of the status of the Company’s nonvested share awards as of June 30, 2015 , and changes during the six month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2015 1,259,689 $34.41 Granted 208,623 41.60 Vested (136,747 ) 29.95 Forfeited (8,368 ) 34.46 Nonvested at June 30, 2015 1,323,197 $36.00 SARs and stock options are granted with exercise prices equal to the market price of the Company’s stock at the date of grant. SARs vest ratably over 4 years of continuous service and have 10 -year contractual terms. All SARs must be settled in stock under provisions of the plan. Stock options, which have not been granted since 2005, vested ratably over 3 years of continuous service and also have 10 -year contractual terms. In determining compensation cost, the Black-Scholes option-pricing model is used to estimate the fair value of SARs and options on date of grant. The current year per share average fair value and the model assumptions are shown in the table below. Weighted per share average fair value at grant date $7.58 Assumptions: Dividend yield 2.2 % Volatility 21.3 % Risk-free interest rate 1.8 % Expected term 7.2 years A summary of SAR activity during the first six months of 2015 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, 2015 1,780,578 $33.96 Granted 240,267 41.40 Forfeited (3,485 ) 39.37 Expired (668 ) 37.33 Exercised (362,378 ) 32.88 Outstanding at June 30, 2015 1,654,314 $35.27 4.5 years $ 19,029 A summary of option activity during the first six months of 2015 is presented below. (Dollars in thousands, except per share data) Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2015 68,675 $29.27 Granted — — Forfeited — — Expired — — Exercised (67,865 ) 29.25 Outstanding at June 30, 2015 810 $31.26 0.2 years $ 13

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2015
Fair Value Measurements [Abstract]
Fair Value Measurements	Fair Value Measurements The Company uses fair value measurements to record fair value adjustments to certain financial and nonfinancial assets and liabilities and to determine fair value disclosures. Various financial instruments such as available for sale and trading securities, certain non-marketable securities relating to private equity activities, and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets and liabilities on a nonrecurring basis, such as mortgage servicing rights and certain other investment securities. These nonrecurring fair value adjustments typically involve lower of cost or fair value accounting or write-downs of individual assets. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, the Company uses various valuation techniques and assumptions when estimating fair value. For accounting disclosure purposes, a three-level valuation hierarchy of fair value measurements has been established. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows: • Level 1 – inputs to the valuation methodology are quoted prices for identical assets or liabilities in active markets. • Level 2 – inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, and inputs that are observable for the assets or liabilities, either directly or indirectly (such as interest rates, yield curves, and prepayment speeds). • Level 3 – inputs to the valuation methodology are unobservable and significant to the fair value. These may be internally developed, using the Company’s best information and assumptions that a market participant would consider. When determining the fair value measurements for assets and liabilities required or permitted to be recorded or disclosed at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability. When possible, the Company looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to observable market data for similar assets and liabilities. Nevertheless, certain assets and liabilities are not actively traded in observable markets, and the Company must use alternative valuation techniques to derive an estimated fair value measurement. Instruments Measured at Fair Value on a Recurring Basis The table below presents the June 30, 2015 and December 31, 2014 carrying values of assets and liabilities measured at fair value on a recurring basis. There were no transfers among levels during the first six months of 2015 or the year ended December 31, 2014 . 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) June 30, 2015 Assets: Residential mortgage loans held for sale $ 7,852 $ — $ 7,852 $ — Available for sale securities: U.S. government and federal agency obligations 434,866 434,866 — — Government-sponsored enterprise obligations 886,501 — 886,501 — State and municipal obligations 1,817,101 — 1,724,161 92,940 Agency mortgage-backed securities 2,587,693 — 2,587,693 — Non-agency mortgage-backed securities 690,938 — 690,938 — Asset-backed securities 2,498,506 — 2,498,506 — Other debt securities 265,107 — 265,107 — Equity securities 41,109 20,272 20,837 — Trading securities 18,971 — 18,971 — Private equity investments 58,726 — — 58,726 Derivatives * 10,621 — 10,266 355 Assets held in trust 9,375 9,375 — — Total assets $ 9,327,366 $ 464,513 $ 8,710,832 $ 152,021 Liabilities: Derivatives * $ 10,348 $ — $ 10,163 $ 185 Total liabilities $ 10,348 $ — $ 10,163 $ 185 December 31, 2014 Assets: Available for sale securities: U.S. government and federal agency obligations $ 501,407 $ 501,407 $ — $ — Government-sponsored enterprise obligations 963,127 — 963,127 — State and municipal obligations 1,813,201 — 1,718,058 95,143 Agency mortgage-backed securities 2,593,708 — 2,593,708 — Non-agency mortgage-backed securities 382,744 — 382,744 — Asset-backed securities 3,091,993 — 3,091,993 — Other debt securities 139,161 — 139,161 — Equity securities 38,219 17,975 20,244 — Trading securities 15,357 — 15,357 — Private equity investments 57,581 — — 57,581 Derivatives * 10,457 — 10,454 3 Assets held in trust 8,848 8,848 — — Total assets $ 9,615,803 $ 528,230 $ 8,934,846 $ 152,727 Liabilities: Derivatives * $ 10,948 $ — $ 10,722 $ 226 Total liabilities $ 10,948 $ — $ 10,722 $ 226 * The fair value of each class of derivative is shown in Note 10. Valuation methods for instruments measured at fair value on a recurring basis Following is a description of the Company’s valuation methodologies used for instruments measured at fair value on a recurring basis. Residential mortgage loans held for sale Loans held for sale are comprised of fixed rate, first lien residential mortgage loans that are intended for sale in the secondary market. Fair value is based on quoted secondary market prices for loans with similar characteristics, which are adjusted to include the embedded servicing value in the loans. This adjustment represents an unobservable input to the valuation but is not considered significant given the relative insensitivity of the valuation to changes in this input. Accordingly, these loan measurements are classified as Level 2. Available for sale investment securities For available for sale securities, changes in fair value, including that portion of other-than-temporary impairment unrelated to credit loss, are recorded in other comprehensive income. As mentioned in Note 3 on Investment Securities, the Company records the credit-related portion of other-than-temporary impairment in current earnings. This portfolio comprises the majority of the assets which the Company records at fair value. Most of the portfolio, which includes government-sponsored enterprise, mortgage-backed and asset-backed securities, are priced utilizing industry-standard models that consider various assumptions, including time value, yield curves, volatility factors, prepayment speeds, default rates, loss severity, current market and contractual prices for the underlying financial instruments, as well as other relevant economic measures. Substantially all of these assumptions are observable in the marketplace, can be derived from observable data, or are supported by observable levels at which transactions are executed in the marketplace. These measurements are classified as Level 2 in the fair value hierarchy. Where quoted prices are available in an active market, the measurements are classified as Level 1. Most of the Level 1 measurements apply to common stock and U.S. Treasury obligations. The fair values of Level 1 and 2 securities (excluding equity securities) in the available for sale portfolio are prices provided by a third-party pricing service. The prices provided by the third-party pricing service are based on observable market inputs, as described in the sections below. On a quarterly basis, the Company compares a sample of these prices to other independent sources for the same and similar securities. Variances are analyzed, and, if appropriate, additional research is conducted with the third-party pricing service. Based on this research, the pricing service may affirm or revise its quoted price. No significant adjustments have been made to the prices provided by the pricing service. The pricing service also provides documentation on an ongoing basis that includes reference data, inputs and methodology by asset class, which is reviewed to ensure that security placement within the fair value hierarchy is appropriate. Valuation methods and inputs, by class of security: • U.S. government and federal agency obligations U.S. treasury bills, bonds and notes, including inflation-protected securities, are valued using live data from active market makers and inter-dealer brokers. Valuations for stripped coupon and principal issues are derived from yield curves generated from various dealer contacts and live data sources. • Government-sponsored enterprise obligations Government-sponsored enterprise obligations are evaluated using cash flow valuation models. Inputs used are live market data, cash settlements, Treasury market yields, and floating rate indices such as LIBOR, CMT, and Prime. • State and municipal obligations, excluding auction rate securities A yield curve is generated and applied to bond sectors, and individual bond valuations are extrapolated. Inputs used to generate the yield curve are bellwether issue levels, established trading spreads between similar issuers or credits, historical trading spreads over widely accepted market benchmarks, new issue scales, and verified bid information. Bid information is verified by corroborating the data against external sources such as broker-dealers, trustees/paying agents, issuers, or non-affiliated bondholders. • Mortgage and asset-backed securities Collateralized mortgage obligations and other asset-backed securities are valued at the tranche level. For each tranche valuation, the process generates predicted cash flows for the tranche, applies a market based (or benchmark) yield/spread for each tranche, and incorporates deal collateral performance and tranche level attributes to determine tranche-specific spreads to adjust the benchmark yield. Tranche cash flows are generated from new deal files and prepayment/default assumptions. Tranche spreads are based on tranche characteristics such as average life, type, volatility, ratings, underlying collateral and performance, and prevailing market conditions. The appropriate tranche spread is applied to the corresponding benchmark, and the resulting value is used to discount the cash flows to generate an evaluated price. Valuation of agency pass-through securities, typically issued under GNMA, FNMA, FHLMC, and SBA programs, are primarily derived from information from the To Be Announced (TBA) market. This market consists of generic mortgage pools which have not been received for settlement. Snapshots of the TBA market, using live data feeds distributed by multiple electronic platforms, and in conjunction with other indices, are used to compute a price based on discounted cash flow models. • Other debt securities Other debt securities are valued using active markets and inter-dealer brokers as well as bullet spread scales and option adjusted spreads. The spreads and models use yield curves, terms and conditions of the bonds, and any special features (i.e., call or put options, redemption features, etc.). • Equity securities Equity securities are priced using the market prices for each security from the major stock exchanges or other electronic quotation systems. These are generally classified as Level 1 measurements. Stocks which trade infrequently are classified as Level 2. The available for sale portfolio includes certain auction rate securities. The auction process by which auction rate securities are normally priced has not functioned in recent years, and due to the illiquidity in the market, the fair value of these securities cannot be based on observable market prices. The fair values of the auction rate securities are estimated using a discounted cash flows analysis which is discussed more fully in the Level 3 Inputs section of this note. Because several of the inputs significant to the measurement are not observable, these measurements are classified as Level 3 measurements. Trading securities The securities in the Company’s trading portfolio are priced by averaging several broker quotes for similar instruments and are classified as Level 2 measurements. Private equity investments These securities are held by the Company’s private equity subsidiaries and are included in non-marketable investment securities in the consolidated balance sheets. Due to the absence of quoted market prices, valuation of these nonpublic investments requires significant management judgment. These fair value measurements, which are discussed in the Level 3 Inputs section of this note, are classified as Level 3. Derivatives The Company’s derivative instruments include interest rate swaps, foreign exchange forward contracts, certain credit risk guarantee agreements, and various instruments related to residential loan sale activity. When appropriate, the impact of credit standing, as well as any potential credit enhancements such as collateral, has been considered in the fair value measurement. • Valuations for interest rate swaps are derived from a proprietary model whose significant inputs are readily observable market parameters, primarily yield curves used to calculate current exposure. Counterparty credit risk is incorporated into the model and calculated by applying a net credit spread over LIBOR to the swap's total expected exposure over time. The net credit spread is comprised of spreads for both the Company and its counterparty, derived from probability of default and other loss estimate information obtained from a third party credit data provider or from the Company's Credit Department when not otherwise available. The credit risk component is not significant compared to the overall fair value of the swaps. The results of the model are constantly validated through comparison to active trading in the marketplace. These fair value measurements are classified as Level 2. • Fair value measurements for foreign exchange contracts are derived from a model whose primary inputs are quotations from global market makers and are classified as Level 2. • The Company’s contracts related to credit risk guarantees are valued under a proprietary model which uses unobservable inputs and assumptions about the creditworthiness of the counterparty (generally a Bank customer). Customer credit spreads, which are based on probability of default and other loss estimates, are calculated internally by the Company's Credit Department, as mentioned above, and are based on the Company's internal risk rating for each customer. Because these inputs are significant to the measurements, they are classified as Level 3. • Derivatives relating to residential mortgage loan sale activity include commitments to originate mortgage loans held for sale, forward loan sale contracts, and forward commitments to sell TBA securities. The fair values of loan commitments and sale contracts are estimated using quoted market prices for loans similar to the underlying loans in these instruments. The valuations of loan commitments are further adjusted to include embedded servicing value and the probability of funding. These assumptions are considered Level 3 inputs and are significant to the loan commitment valuation; accordingly, the measurement of loan commitments is classified as Level 3. The fair value measurement of TBA contracts is based on security prices published on trading platforms and is classified as Level 2. Assets held in trust Assets held in an outside trust for the Company’s deferred compensation plan consist of investments in mutual funds. The fair value measurements are based on quoted prices in active markets and classified as Level 1. The Company has recorded an asset representing the total investment amount. The Company has also recorded a corresponding nonfinancial liability, representing the Company’s liability to the plan participants. 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 June 30, 2015 Balance March 31, 2015 $ 93,271 $ 61,162 $ 158 $ 154,591 Total gains or losses (realized/unrealized): Included in earnings — 875 12 887 Included in other comprehensive income * (352 ) — — (352 ) Discount accretion 21 — — 21 Purchases of private equity investments — 1,437 — 1,437 Sale/pay down of private equity investments — (4,800 ) — (4,800 ) Capitalized interest/dividends — 52 — 52 Balance June 30, 2015 $ 92,940 $ 58,726 $ 170 $ 151,836 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 June 30, 2015 $ — $ 875 $ 420 $ 1,295 For the six months ended June 30, 2015 Balance January 1, 2015 $ 95,143 $ 57,581 $ (223 ) $ 152,501 Total gains or losses (realized/unrealized): Included in earnings — 4,175 393 4,568 Included in other comprehensive income * (354 ) — — (354 ) Investment securities called (2,000 ) — — (2,000 ) Discount accretion 151 — — 151 Purchases of private equity investments — 1,653 — 1,653 Sale/pay down of private equity investments — (4,800 ) — (4,800 ) Capitalized interest/dividends — 117 — 117 Balance June 30, 2015 $ 92,940 $ 58,726 $ 170 $ 151,836 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2015 $ — $ 4,175 $ 393 $ 4,568 For the three months ended June 30, 2014 Balance March 31, 2014 $ 126,979 $ 76,446 $ (67 ) $ 203,358 Total gains or losses (realized/unrealized): Included in earnings — (4,858 ) 93 (4,765 ) Included in other comprehensive income * 5,088 — — 5,088 Discount accretion 41 — — 41 Purchases of private equity investments — 4,000 — 4,000 Sale/pay down of private equity investments — (31,409 ) — (31,409 ) Capitalized interest/dividends — 13 — 13 Sale of risk participation agreement — — (214 ) (214 ) Balance June 30, 2014 $ 132,108 $ 44,192 $ (188 ) $ 176,112 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 June 30, 2014 $ — $ (4,858 ) $ 89 $ (4,769 ) For the six months ended June 30, 2014 Balance January 1, 2014 $ 127,724 $ 56,612 $ (65 ) $ 184,271 Total gains or losses (realized/unrealized): Included in earnings — 11,936 198 12,134 Included in other comprehensive income * 4,304 — — 4,304 Discount accretion 80 — — 80 Purchases of private equity investments — 7,000 — 7,000 Sale/pay down of private equity investments — (31,423 ) — (31,423 ) Capitalized interest/dividends — 67 — 67 Sale of risk participation agreement — — (321 ) (321 ) Balance June 30, 2014 $ 132,108 $ 44,192 $ (188 ) $ 176,112 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2014 $ — $ (6,457 ) $ 194 $ (6,263 ) * 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 June 30, 2015 Total gains or losses included in earnings $ (63 ) $ 75 $ 875 $ 887 Change in unrealized gains or losses relating to assets still held at June 30, 2015 $ 345 $ 75 $ 875 $ 1,295 For the six months ended June 30, 2015 Total gains or losses included in earnings $ 345 $ 48 $ 4,175 $ 4,568 Change in unrealized gains or losses relating to assets still held at June 30, 2015 $ 345 $ 48 $ 4,175 $ 4,568 For the three months ended June 30, 2014 Total gains or losses included in earnings $ — $ 93 $ (4,858 ) $ (4,765 ) Change in unrealized gains or losses relating to assets still held at June 30, 2014 $ — $ 89 $ (4,858 ) $ (4,769 ) For the six months ended June 30, 2014 Total gains or losses included in earnings $ — $ 198 $ 11,936 $ 12,134 Change in unrealized gains or losses relating to assets still held at June 30, 2014 $ — $ 194 $ (6,457 ) $ (6,263 ) Level 3 Inputs As shown above, 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 $92.9 million at June 30, 2015 , while private equity investments, included in non-marketable securities, totaled $58.7 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 3 - 5 years Estimated market rate 2.0% - 5.0% Private equity investments Market comparable companies EBITDA multiple 4.0 - 5.5 Mortgage loan commitments Discounted cash flow Probability of funding 64.7% - 100.0% 85.2% Embedded servicing value .7% - 1.0% 1.0% The fair values of ARS are estimated using a discounted cash flows analysis in which estimated cash flows are based on mandatory interest rates paid under failing auctions and projected over an estimated market recovery period. Under normal conditions, ARS traded in weekly auctions and were considered liquid investments. The Company's estimate of when these auctions might resume is highly judgmental and subject to variation depending on current and projected market conditions. Few auctions of these securities are held, and most sales are privately arranged. Estimated cash flows during the period over which the Company expects to hold the securities are discounted at an estimated market rate. These securities are comprised of bonds issued by various states and municipalities for healthcare and student lending purposes, and market rates are derived for each type. Market rates are calculated at each valuation date using a LIBOR or Treasury based rate plus spreads representing adjustments for liquidity premium and nonperformance risk. The spreads are developed internally by employees in the Company's bond department. An increase in the holding period alone would result in a higher fair value measurement, while an increase in the estimated market rate (the discount rate) alone would result in a lower fair value measurement. The valuation of the ARS portfolio is reviewed on a quarterly basis by the Company's chief investment officers. The fair values of the Company's private equity investments are based on a determination of fair value of the investee company less preference payments assuming the sale of the investee company. Investee companies are normally non-public entities. The fair value of the investee company is determined by reference to the investee's total earnings before interest, depreciation/amortization, and income taxes (EBITDA) multiplied by an EBITDA factor. EBITDA is normally determined based on a trailing prior period adjusted for specific factors including current economic outlook, investee management, and specific unique circumstances such as sales order information, major customer status, regulatory changes, etc. The EBITDA multiple is based on management's review of published trading multiples for recent private equity transactions and other judgments and is derived for each individual investee. The fair value of the Company's investment (which is usually a partial interest in the investee company) is then calculated based on its ownership percentage in the investee company. On a quarterly basis, these fair value analyses are reviewed by a valuation committee consisting of investment managers and senior Company management. The significant unobservable inputs used in the fair value measurement of the Company’s derivative commitments to originate residential mortgage loans are the percentage of commitments that are actually funded and the mortgage servicing value that is inherent in the underlying loan value. A significant increase in the rate of loans that fund would result in a larger derivative asset or liability. A significant increase in the inherent mortgage servicing value would result in an increase in the derivative asset or a reduction in the derivative liability. The probability of funding and the inherent mortgage servicing values are directly impacted by changes in market rates and will generally move in the same direction as interest rates. Instruments Measured at Fair Value on a Nonrecurring Basis For assets measured at fair value on a nonrecurring basis during the first six months of 2015 and 2014 , and still held as of June 30, 2015 and 2014 , 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 June 30, 2015 and 2014 . 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 Six Months Ended June 30 June 30, 2015 Collateral dependent impaired loans $ 3,897 $ — $ — $ 3,897 $ (1,340 ) Mortgage servicing rights 1,242 — — 1,242 53 Foreclosed assets 608 — — 608 (162 ) Long-lived assets 2,425 — — 2,425 (1,667 ) June 30, 2014 Collateral dependent impaired loans $ 10,603 $ — $ — $ 10,603 $ (3,124 ) Private equity investments 1,309 — — 1,309 (1,191 ) Mortgage servicing rights 793 — — 793 1 Foreclosed assets 1,191 — — 1,191 (319 ) Long-lived assets 7,246 — — 7,246 (1,408 ) Valuation methods for instruments measured at fair value on a nonrecurring basis Following is a description of the Company’s valuation methodologies used for other financial and nonfinancial instruments measured at fair value on a nonrecurring basis. Collateral dependent impaired loans While the overall loan portfolio is not carried at fair value, the Company periodically records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans. Nonrecurring adjustments also include certain impairment amounts for collateral dependent loans when establishing the allowance for loan losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan. In determining the value of real estate collateral, the Company relies on external and internal appraisals of property values depending on the size and complexity of the real estate collateral. The Company maintains a staff of qualified appraisers who also review third party appraisal reports for reasonableness. In the case of non-real estate collateral, reliance is placed on a variety of sources, including external estimates of value and judgments based on the experience and expertise of internal specialists. Values of all loan collateral are regularly reviewed by credit administration. Unobservable inputs to these measurements, which include estimates and judgments often used in conjunction with appraisals, are not readily quantifiable. These measurements are classified as Level 3. Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company at June 30, 2015 and 2014 are shown in the table above. Private equity investments and restricted stock These assets are included in non-marketable investment securities in the consolidated balance sheets. They include certain investments in private equity concerns held by the Parent company which are carried at cost, reduced by other-than-temporary impairment. These investments are periodically evaluated for impairment based on their estimated fair value as determined by review of available information, most of which is provided as monthly or quarterly internal financial statements, annual audited financial statements, investee tax returns, and in certain situations, through research into and analysis of the assets and investments held by those private equity concerns. Restricted stock consists of stock issued by the Federal Reserve Bank and FHLB and is held by the bank subsidiary as required for regulatory purposes. Generally, there are restrictions on the sale and/or liquidation of these investments, and they are carried at cost, reduced by other-than-temporary impairment. Fair value measurements for these securities are classified as Level 3. Mortgage servicing rights The Company initially measures its mortgage servicing rights at fair value and amortizes them over the period of estimated net servicing income. They are periodically assessed for impairment based on fair value at the reporting date. Mortgage servicing rights do not trade in an active market with readily observable prices. Accordingly, the fair value is estimated based on a valuation model which calculates the present value of estimated future net servicing income. The model incorporates assumptions that market participants use in estimating future net servicing income, including estimates of prepayment speeds, market discount rates, cost to service, float earnings rates, and other ancillary income, including late fees. The fair value measurements are classified as Level 3. Foreclosed assets Foreclosed assets consist of loan collateral which has been repossessed through foreclosure. This collateral is comprised of commercial and residential real estate and other non-real estate property, including auto, marine and recreational vehicles. Foreclosed assets are recorded as held for sale initially at the lower of the loan balance or fair value of the collateral less estimated selling costs. Subsequent to foreclosure, valuations are updated periodically, and the assets may be marked down further, reflecting a new cost basis. Fair value measurements may be based upon appraisals, third-party price opinions, or internally developed pricing methods. These measurements are classified as Level 3. Long-lived assets In accordance with ASC 360-10-35, investments in branch facilities and various office buildings are written down to estimated fair value, or if the property is held for sale, they are written down to estimated fair value less cost to sell. Fair value is estimated in a process which considers current local commercial real estate market conditions and the judgment of the sales agent and often involves obtaining third party appraisals from certified real estate appraisers. The carrying amounts of these real estate holdings are regularly monitored by real estate professionals employed by the Company. These fair value measurements are classified as Level 3. Unobservable inputs to these measurements, which include estimates and judgments often used in conjunction with appraisals, are not readily quantifiable. The measurements in 2015 pertained mainly to two branch facility sites which are currently being marketed for sale or re-developed.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	6 Months Ended
	Jun. 30, 2015
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	Fair Value of Financial Instruments The carrying amounts and estimated fair values of financial instruments held by the Company are set forth below. Fair value estimates are made at a specific point in time based on relevant market information. They do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for many of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, risk characteristics and economic conditions. These estimates are subjective, involve uncertainties, and cannot be determined with precision. Changes in assumptions could significantly affect the estimates. The methods and inputs used in the estimation of fair value for the financial instruments in the table below are discussed in the preceding Fair Value Measurements note and in the Fair Value of Financial Instruments note in the Company's 2014 Annual Report on Form 10-K. There have been no significant changes in these methods and inputs since December 31, 2014 . The estimated fair values of the Company’s financial instruments and the classification of their fair value measurement within the valuation hierarchy are as follows: Fair Value Hierarchy Level June 30, 2015 December 31, 2014 (In thousands) Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Financial Assets Loans: Business Level 3 $ 4,267,997 $ 4,282,667 $ 3,969,952 $ 3,982,531 Real estate - construction and land Level 3 448,887 454,531 403,507 407,905 Real estate - business Level 3 2,276,231 2,308,581 2,288,215 2,315,378 Real estate - personal Level 3 1,901,671 1,932,967 1,883,092 1,933,456 Consumer Level 3 1,848,457 1,843,240 1,705,134 1,701,037 Revolving home equity Level 3 430,880 433,447 430,873 433,508 Consumer credit card Level 3 750,731 763,226 782,370 794,929 Overdrafts Level 3 3,627 3,627 6,095 6,095 Loans held for sale Level 2 7,852 7,852 — — Investment securities: Available for sale Level 1 455,138 455,138 519,382 519,382 Available for sale Level 2 8,673,743 8,673,743 8,909,035 8,909,035 Available for sale Level 3 92,940 92,940 95,143 95,143 Trading Level 2 18,971 18,971 15,357 15,357 Non-marketable Level 3 108,346 108,346 106,875 106,875 Federal funds sold Level 1 26,875 26,875 32,485 32,485 Securities purchased under agreements to resell Level 3 1,050,000 1,050,400 1,050,000 1,048,866 Interest earning deposits with banks Level 1 264,683 264,683 600,744 600,744 Cash and due from banks Level 1 409,791 409,791 467,488 467,488 Derivative instruments Level 2 10,266 10,266 10,454 10,454 Derivative instruments Level 3 355 355 3 3 Financial Liabilities Non-interest bearing deposits Level 1 $ 6,886,509 $ 6,886,509 $ 6,811,959 $ 6,811,959 Savings, interest checking and money market deposits Level 1 10,369,031 10,369,031 10,541,601 10,541,601 Time open and certificates of deposit Level 3 2,033,169 2,031,121 2,122,218 2,121,114 Federal funds purchased Level 1 350 350 3,840 3,840 Securities sold under agreements to repurchase Level 3 1,665,693 1,665,751 1,858,678 1,858,731 Other borrowings Level 3 103,843 110,087 104,058 111,102 Derivative instruments Level 2 10,163 10,163 10,722 10,722 Derivative instruments Level 3 185 185 226 226

Legal Proceedings (Notes)

Legal Proceedings (Notes)	6 Months Ended
	Jun. 30, 2015
Legal Proceedings [Abstract]
Legal Matters and Contingencies [Text Block]	Legal Proceedings On August 15, 2014, a customer filed a purported class action complaint against the Bank in the Circuit Court, Jackson County, Missouri. The case is Cassandra Warren, et al v. Commerce Bank (Case No. 1416-CV19197). In the case, the customer alleges violation of the Missouri usury statute in connection with the Bank charging overdraft fees in connection with point-of-sale/debit and automated-teller machine cards. The case seeks class-action status for Missouri customers of the Bank who may have been similarly affected. The Company believes the complaint lacks merit and will defend itself vigorously. The amount of any ultimate exposure cannot be determined with certainty at this time. The Company has various other lawsuits pending at June 30, 2015 , 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 matters for which it deems a loss is probable and can be reasonably estimated. Some legal matters, which are at early stages in the legal process, have not yet progressed to the point where a loss amount can be determined to be probable and estimable.

Loans And Allowance For Loan 24

Loans And Allowance For Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2015
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 June 30, 2015 and December 31, 2014 are as follows: (In thousands) June 30, 2015 December 31, 2014 Commercial: Business $ 4,267,997 $ 3,969,952 Real estate – construction and land 448,887 403,507 Real estate – business 2,276,231 2,288,215 Personal Banking: Real estate – personal 1,901,671 1,883,092 Consumer 1,848,457 1,705,134 Revolving home equity 430,880 430,873 Consumer credit card 750,731 782,370 Overdrafts 3,627 6,095 Total loans $ 11,928,481 $ 11,469,238
Summary Of Activity In The Allowance For Loan Losses	A summary of the activity in the allowance for loan losses during the three and six months ended June 30, 2015 and 2014 , respectively, follows: For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) Commercial Personal Banking Total Commercial Personal Banking Total Balance at beginning of period $ 88,906 $ 64,626 $ 153,532 $ 89,622 $ 66,910 $ 156,532 Provision (2,361 ) 9,118 6,757 (4,113 ) 15,290 11,177 Deductions: Loans charged off 1,408 11,297 12,705 2,132 22,873 25,005 Less recoveries on loans 1,192 2,756 3,948 2,952 5,876 8,828 Net loan charge-offs (recoveries) 216 8,541 8,757 (820 ) 16,997 16,177 Balance June 30, 2015 $ 86,329 $ 65,203 $ 151,532 $ 86,329 $ 65,203 $ 151,532 Balance at beginning of period $ 97,881 $ 63,651 $ 161,532 $ 94,189 $ 67,343 $ 161,532 Provision 486 7,069 7,555 4,553 12,662 17,215 Deductions: Loans charged off 1,218 11,752 12,970 2,348 24,503 26,851 Less recoveries on loans 1,779 3,636 5,415 2,534 7,102 9,636 Net loan charge-offs (recoveries) (561 ) 8,116 7,555 (186 ) 17,401 17,215 Balance June 30, 2014 $ 98,928 $ 62,604 $ 161,532 $ 98,928 $ 62,604 $ 161,532
Allowance For Loan Losses And Related Loan Balance Disaggregated On The Basis Of Impairment Methodology	The following table shows the balance in the allowance for loan losses and the related loan balance at June 30, 2015 and December 31, 2014 , disaggregated on the basis of impairment methodology. Impaired loans evaluated under ASC 310-10-35 include loans on non-accrual status, which are individually evaluated for impairment, and other impaired loans discussed below, which are deemed to have similar risk characteristics and are collectively evaluated. All other loans are collectively evaluated for impairment under ASC 450-20. Impaired Loans All Other Loans (In thousands) Allowance for Loan Losses Loans Outstanding Allowance for Loan Losses Loans Outstanding June 30, 2015 Commercial $ 1,943 $ 31,276 $ 84,386 $ 6,961,839 Personal Banking 1,813 24,300 63,390 4,911,066 Total $ 3,756 $ 55,576 $ 147,776 $ 11,872,905 December 31, 2014 Commercial $ 4,527 $ 55,551 $ 85,095 $ 6,606,123 Personal Banking 2,314 25,537 64,596 4,782,027 Total $ 6,841 $ 81,088 $ 149,691 $ 11,388,150
Investment In Impaired Loans	The table below shows the Company’s investment in impaired loans at June 30, 2015 and December 31, 2014 . 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 under ASC 310-40. These restructured loans are performing in accordance with their modified terms, and because the Company believes it probable that all amounts due under the modified terms of the agreements will be collected, interest on these loans is being recognized on an accrual basis. They are discussed further in the "Troubled debt restructurings" section on page 14. (In thousands) June 30, 2015 Dec. 31, 2014 Non-accrual loans $ 26,645 $ 40,775 Restructured loans (accruing) 28,931 40,313 Total impaired loans $ 55,576 $ 81,088
Additional Information About Impaired Loans Held	The following table provides additional information about impaired loans held by the Company at June 30, 2015 and December 31, 2014 , 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 June 30, 2015 With no related allowance recorded: Business $ 9,779 $ 11,911 $ — Real estate – construction and land 3,102 8,554 — Real estate – business 2,213 3,629 — Real estate – personal 618 815 — $ 15,712 $ 24,909 $ — With an allowance recorded: Business $ 7,303 $ 9,408 $ 836 Real estate – construction and land 3,658 5,129 321 Real estate – business 5,221 9,299 786 Real estate – personal 8,710 11,832 1,030 Consumer 5,378 5,492 91 Revolving home equity 523 523 21 Consumer credit card 9,071 9,071 671 $ 39,864 $ 50,754 $ 3,756 Total $ 55,576 $ 75,663 $ 3,756 December 31, 2014 With no related allowance recorded: Business $ 9,237 $ 11,532 $ — Real estate – construction and land 4,552 8,493 — Real estate – business 13,453 17,258 — Revolving home equity 1,227 1,384 — $ 28,469 $ 38,667 $ — With an allowance recorded: Business $ 12,326 $ 13,846 $ 1,844 Real estate – construction and land 8,148 9,610 1,081 Real estate – business 7,835 15,025 1,602 Real estate – personal 9,096 12,465 1,441 Consumer 4,244 4,244 50 Revolving home equity 529 529 9 Consumer credit card 10,441 10,441 814 $ 52,619 $ 66,160 $ 6,841 Total $ 81,088 $ 104,827 $ 6,841
Total Average Impaired Loans	Total average impaired loans for the three and six month periods ended June 30, 2015 and 2014 , respectively, are shown in the table below. (In thousands) Commercial Personal Banking Total Average Impaired Loans: For the three months ended June 30, 2015 Non-accrual loans $ 25,063 $ 5,948 $ 31,011 Restructured loans (accruing) 14,254 18,968 33,222 Total $ 39,317 $ 24,916 $ 64,233 For the six months ended June 30, 2015 Non-accrual loans $ 28,155 $ 6,102 $ 34,257 Restructured loans (accruing) 18,245 19,176 37,421 Total $ 46,400 $ 25,278 $ 71,678 For the three months ended June 30, 2014 Non-accrual loans $ 35,908 $ 7,131 $ 43,039 Restructured loans (accruing) 40,167 20,745 60,912 Total $ 76,075 $ 27,876 $ 103,951 For the six months ended June 30, 2014 Non-accrual loans $ 38,093 $ 7,347 $ 45,440 Restructured loans (accruing) 39,285 21,086 60,371 Total $ 77,378 $ 28,433 $ 105,811
Interest Income Recognized On Impaired Loans	The table below shows interest income recognized during the three and six month periods ended June 30, 2015 and 2014 , respectively, for impaired loans held at the end of each respective period. This interest all relates to accruing restructured loans, as discussed in the "Troubled debt restructurings" section on page 14. For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2015 2014 2015 2014 Interest income recognized on impaired loans: Business $ 42 $ 181 $ 84 $ 361 Real estate – construction and land 42 142 84 283 Real estate – business 15 46 30 91 Real estate – personal 48 58 96 115 Consumer 85 71 169 142 Revolving home equity 6 7 11 14 Consumer credit card 179 228 357 456 Total $ 417 $ 733 $ 831 $ 1,462
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 June 30, 2015 and December 31, 2014 . (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 June 30, 2015 Commercial: Business $ 4,252,087 $ 3,643 $ 411 $ 11,856 $ 4,267,997 Real estate – construction and land 438,905 4,903 1,479 3,600 448,887 Real estate – business 2,264,297 6,291 — 5,643 2,276,231 Personal Banking: Real estate – personal 1,885,544 8,480 2,201 5,446 1,901,671 Consumer 1,832,142 14,179 2,036 100 1,848,457 Revolving home equity 427,644 1,912 1,324 — 430,880 Consumer credit card 736,213 7,751 6,767 — 750,731 Overdrafts 3,345 282 — — 3,627 Total $ 11,840,177 $ 47,441 $ 14,218 $ 26,645 $ 11,928,481 December 31, 2014 Commercial: Business $ 3,946,144 $ 11,152 $ 1,096 $ 11,560 $ 3,969,952 Real estate – construction and land 397,488 827 35 5,157 403,507 Real estate – business 2,266,688 3,661 — 17,866 2,288,215 Personal Banking: Real estate – personal 1,868,606 6,618 1,676 6,192 1,883,092 Consumer 1,687,285 16,053 1,796 — 1,705,134 Revolving home equity 428,478 1,552 843 — 430,873 Consumer credit card 764,599 9,559 8,212 — 782,370 Overdrafts 5,721 374 — — 6,095 Total $ 11,365,009 $ 49,796 $ 13,658 $ 40,775 $ 11,469,238
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 June 30, 2015 Pass $ 4,179,038 $ 439,769 $ 2,210,059 $ 6,828,866 Special mention 46,321 1,111 15,842 63,274 Substandard 30,782 4,407 44,687 79,876 Non-accrual 11,856 3,600 5,643 21,099 Total $ 4,267,997 $ 448,887 $ 2,276,231 $ 6,993,115 December 31, 2014 Pass $ 3,871,569 $ 385,831 $ 2,184,541 $ 6,441,941 Special mention 62,904 3,865 40,668 107,437 Substandard 23,919 8,654 45,140 77,713 Non-accrual 11,560 5,157 17,866 34,583 Total $ 3,969,952 $ 403,507 $ 2,288,215 $ 6,661,674
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 June 30, 2015 and December 31, 2014 by FICO score. Personal Banking Loans % of Loan Category Real Estate - Personal Consumer Revolving Home Equity Consumer Credit Card June 30, 2015 FICO score: Under 600 1.6 % 4.8 % 1.8 % 3.9 % 600 - 659 3.2 9.7 3.9 11.7 660 - 719 9.7 22.5 13.3 32.4 720 - 779 26.8 26.9 25.7 28.0 780 and over 58.7 36.1 55.3 24.0 Total 100.0 % 100.0 % 100.0 % 100.0 % December 31, 2014 FICO score: Under 600 1.4 % 5.2 % 1.8 % 4.1 % 600 - 659 3.1 10.2 4.4 11.8 660 - 719 9.9 22.9 13.7 32.4 720 - 779 26.7 28.0 32.8 27.8 780 and over 58.9 33.7 47.3 23.9 Total 100.0 % 100.0 % 100.0 % 100.0 %
Outstanding Balance Of Loans Classified As Troubled Debt Restructurings	The following table shows the outstanding balances of loans classified as troubled debt restructurings at June 30, 2015 , 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) June 30, 2015 Balance 90 days past due at any time during previous 12 months Commercial: Business $ 14,945 $ — Real estate - construction and land 6,418 181 Real estate - business 3,495 — Personal Banking: Real estate - personal 5,606 192 Consumer 5,303 84 Revolving home equity 523 91 Consumer credit card 9,071 693 Total restructured loans $ 45,361 $ 1,241

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2015
Investment Securities [Abstract]
Investment Securities, At Fair Value	nvestment securities, at fair value, consisted of the following at June 30, 2015 and December 31, 2014 . (In thousands) June 30, 2015 Dec. 31, 2014 Available for sale $ 9,221,821 $ 9,523,560 Trading 18,971 15,357 Non-marketable 108,346 106,875 Total investment securities $ 9,349,138 $ 9,645,792
Summary Of Available For Sale Investment Securities By Maturity Groupings	A summary of the available for sale investment securities by maturity groupings as of June 30, 2015 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. 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 $ 90,775 $ 91,331 After 1 but within 5 years 167,145 174,685 After 5 but within 10 years 117,077 119,760 After 10 years 52,624 49,090 Total U.S. government and federal agency obligations 427,621 434,866 Government-sponsored enterprise obligations: Within 1 year 43,033 43,300 After 1 but within 5 years 481,824 484,932 After 5 but within 10 years 357,783 352,912 After 10 years 5,630 5,357 Total government-sponsored enterprise obligations 888,270 886,501 State and municipal obligations: Within 1 year 139,111 139,708 After 1 but within 5 years 657,544 673,868 After 5 but within 10 years 851,707 848,846 After 10 years 159,222 154,679 Total state and municipal obligations 1,807,584 1,817,101 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,531,365 2,587,693 Non-agency mortgage-backed securities 682,114 690,938 Asset-backed securities 2,494,905 2,498,506 Total mortgage and asset-backed securities 5,708,384 5,777,137 Other debt securities: Within 1 year 3,999 4,063 After 1 but within 5 years 62,023 62,069 After 5 but within 10 years 191,771 187,374 After 10 years 12,000 11,601 Total other debt securities 269,793 265,107 Equity securities 5,678 41,109 Total available for sale investment securities $ 9,107,330 $ 9,221,821
Available For Sale Securities Unrealized Gains And Losses By Security Type	For securities classified as available for sale, the following table shows the unrealized gains and losses (pre-tax) in accumulated other comprehensive income, by security type. (In thousands) Amortized Cost Gross Gross Fair Value June 30, 2015 U.S. government and federal agency obligations $ 427,621 $ 11,597 $ (4,352 ) $ 434,866 Government-sponsored enterprise obligations 888,270 4,462 (6,231 ) 886,501 State and municipal obligations 1,807,584 22,700 (13,183 ) 1,817,101 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,531,365 63,083 (6,755 ) 2,587,693 Non-agency mortgage-backed securities 682,114 11,079 (2,255 ) 690,938 Asset-backed securities 2,494,905 7,410 (3,809 ) 2,498,506 Total mortgage and asset-backed securities 5,708,384 81,572 (12,819 ) 5,777,137 Other debt securities 269,793 416 (5,102 ) 265,107 Equity securities 5,678 35,431 — 41,109 Total $ 9,107,330 $ 156,178 $ (41,687 ) $ 9,221,821 December 31, 2014 U.S. government and federal agency obligations $ 497,336 $ 9,095 $ (5,024 ) $ 501,407 Government-sponsored enterprise obligations 968,574 2,593 (8,040 ) 963,127 State and municipal obligations 1,789,215 32,340 (8,354 ) 1,813,201 Mortgage and asset-backed securities: Agency mortgage-backed securities 2,523,377 75,923 (5,592 ) 2,593,708 Non-agency mortgage-backed securities 372,911 11,061 (1,228 ) 382,744 Asset-backed securities 3,090,174 6,922 (5,103 ) 3,091,993 Total mortgage and asset-backed securities 5,986,462 93,906 (11,923 ) 6,068,445 Other debt securities 140,784 420 (2,043 ) 139,161 Equity securities 3,931 34,288 — 38,219 Total $ 9,386,302 $ 172,642 $ (35,384 ) $ 9,523,560
Cash Flow Model Inputs Used To Calculate Credit Losses	ignificant inputs to the cash flow models used to calculate the credit losses on these securities at June 30, 2015 included the following: Significant Inputs Range Prepayment CPR 1% - 25% Projected cumulative default 18% - 54% Credit support 0% - 20% Loss severity 21% - 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 Six Months Ended June 30 (In thousands) 2015 2014 Cumulative OTTI credit losses at January 1 $ 13,734 $ 12,499 Credit losses on debt securities for which impairment was not previously recognized 76 — Credit losses on debt securities for which impairment was previously recognized 407 977 Increase in expected cash flows that are recognized over remaining life of security (51 ) (66 ) Cumulative OTTI credit losses at June 30 $ 14,166 $ 13,410
Securities With Unrealized Losses And Length Of Impairment Period	Securities with unrealized losses recorded in accumulated other comprehensive income are shown in the table below, along with the length of the impairment period. Less than 12 months 12 months or longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses June 30, 2015 U.S. government and federal agency obligations $ 24,495 $ 482 $ 31,984 $ 3,870 $ 56,479 $ 4,352 Government-sponsored enterprise obligations 193,644 882 157,187 5,349 350,831 6,231 State and municipal obligations 515,521 5,907 124,227 7,276 639,748 13,183 Mortgage and asset-backed securities: Agency mortgage-backed securities 214,715 1,417 315,002 5,338 529,717 6,755 Non-agency mortgage-backed securities 369,784 1,861 54,265 394 424,049 2,255 Asset-backed securities 806,300 1,259 144,478 2,550 950,778 3,809 Total mortgage and asset-backed securities 1,390,799 4,537 513,745 8,282 1,904,544 12,819 Other debt securities 202,489 3,998 25,411 1,104 227,900 5,102 Total $ 2,326,948 $ 15,806 $ 852,554 $ 25,881 $ 3,179,502 $ 41,687 December 31, 2014 U.S. government and federal agency obligations $ 90,261 $ 818 $ 32,077 $ 4,206 $ 122,338 $ 5,024 Government-sponsored enterprise obligations 224,808 922 224,779 7,118 449,587 8,040 State and municipal obligations 172,980 646 215,702 7,708 388,682 8,354 Mortgage and asset-backed securities: Agency mortgage-backed securities 55,128 429 381,617 5,163 436,745 5,592 Non-agency mortgage-backed securities 141,655 609 43,659 619 185,314 1,228 Asset-backed securities 1,424,457 2,009 159,098 3,094 1,583,555 5,103 Total mortgage and asset-backed securities 1,621,240 3,047 584,374 8,876 2,205,614 11,923 Other debt securities 16,434 55 80,203 1,988 96,637 2,043 Total $ 2,125,723 $ 5,488 $ 1,137,135 $ 29,896 $ 3,262,858 $ 35,384
State And Municipal Obligations, By State And Economic Sector	The portfolio is diversified in order to reduce risk, and information about the top five largest holdings, by state and economic sector, is shown in the table below. The Company has processes and procedures in place to monitor its holdings, identify signs of financial distress and, if necessary, exit its positions in a timely manner. % of Portfolio Average Life (in years) Average Rating (Moody’s) At June 30, 2015 Texas 12.6 % 5.8 Aa2 Florida 7.7 4.0 Aa3 Ohio 6.5 5.7 Aa2 New York 6.2 6.4 Aa2 Washington 5.3 5.1 Aa2 General obligation 34.7 % 5.6 Aa2 Lease 19.1 5.6 Aa3 Housing 12.5 3.8 Aa1 Transportation 12.1 4.8 A1 Limited tax 8.4 6.6 Aa2
Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses	The following table presents proceeds from sales of securities and the components of investment securities gains and losses which have been recognized in earnings. For the Six Months Ended June 30 (In thousands) 2015 2014 Proceeds from sales of available for sale securities $ 675,870 $ 30,998 Proceeds from sales of non-marketable securities 7,332 32,901 Total proceeds $ 683,202 $ 63,899 Available for sale: Gains realized on sales $ 2,813 $ — Losses realized on sales — (5,197 ) Gain realized on donation — 1,570 Other-than-temporary impairment recognized on debt securities (483 ) (977 ) Non-marketable: Gains realized on sales 1,673 1,472 Losses realized on sales — (134 ) Fair value adjustments, net 4,175 10,745 Investment securities gains, net $ 8,178 $ 7,479

Goodwill And Other Intangible26

Goodwill And Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2015
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. June 30, 2015 December 31, 2014 (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 $ (25,534 ) $ — $ 5,736 $ 31,270 $ (24,698 ) $ — $ 6,572 Mortgage servicing rights 4,113 (2,827 ) (44 ) 1,242 3,693 (2,718 ) (97 ) 878 Total $ 35,383 $ (28,361 ) $ (44 ) $ 6,978 $ 34,963 $ (27,416 ) $ (97 ) $ 7,450
Schedule of Estimated Annual Amortization Expense	he following table shows the estimated annual amortization expense for the next five fiscal years. This expense is based on existing asset balances and the interest rate environment as of June 30, 2015 . 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) 2015 $ 1,713 2016 1,339 2017 1,004 2018 762 2019 629
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 six month period ended June 30, 2015 is as follows. (In thousands) Goodwill Core Deposit Premium Mortgage Servicing Rights Balance January 1, 2015 $ 138,921 $ 6,572 $ 878 Originations — — 420 Amortization — (836 ) (109 ) Impairment reversal — — 53 Balance June 30, 2015 $ 138,921 $ 5,736 $ 1,242
Schedule Of Goodwill Allocated By Operating Segments	Goodwill allocated to the Company’s operating segments at June 30, 2015 and December 31, 2014 is shown below. (In thousands) Consumer segment $ 70,721 Commercial segment 67,454 Wealth segment 746 Total goodwill $ 138,921

Pension (Tables)

Pension (Tables)	6 Months Ended
	Jun. 30, 2015
Pension [Abstract]
Net Pension Cost	The amount of net pension cost is shown in the table below: For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2015 2014 2015 2014 Service cost - benefits earned during the period $ 126 $ 133 $ 252 $ 266 Interest cost on projected benefit obligation 1,216 1,262 2,432 2,523 Expected return on plan assets (1,523 ) (1,561 ) (3,046 ) (3,122 ) Amortization of unrecognized net loss 654 360 1,309 720 Net periodic pension cost $ 473 $ 194 $ 947 $ 387

Common Stock (Tables)

Common Stock (Tables)	6 Months Ended
	Jun. 30, 2015
Common Stock [Abstract]
Summary Of Components Used To Calculate Basic And Diluted Income Per Share	Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested share-based awards that contain nonforfeitable rights to dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested share-based awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 12. For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands, except per share data) 2015 2014 2015 2014 Basic income per common share: Net income attributable to Commerce Bancshares, Inc. $ 74,353 $ 66,531 $ 135,408 $ 130,844 Less preferred stock dividends 2,250 — 4,500 — Net income available to common shareholders 72,103 66,531 130,908 130,844 Less income allocated to nonvested restricted stock 997 856 1,793 1,658 Net income allocated to common stock $ 71,106 $ 65,675 $ 129,115 $ 129,186 Weighted average common shares outstanding 94,380 98,206 94,832 98,855 Basic income per common share $ .75 $ .67 $ 1.36 $ 1.31 Diluted income per common share: Net income available to common shareholders $ 72,103 $ 66,531 $ 130,908 $ 130,844 Less income allocated to nonvested restricted stock 995 854 1,789 1,653 Net income allocated to common stock $ 71,108 $ 65,677 $ 129,119 $ 129,191 Weighted average common shares outstanding 94,380 98,206 94,832 98,855 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 322 403 311 423 Weighted average diluted common shares outstanding 94,702 98,609 95,143 99,278 Diluted income per common share $ .75 $ .66 $ 1.36 $ 1.30

Accumulated Other Comprehensi29

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of Accumulated Other Comprehensive Income	The table below shows the activity and accumulated balances for components of other comprehensive income. The largest component is the unrealized holding gains and losses on available for sale securities. Unrealized gains and losses on debt securities for which an other-than-temporary impairment (OTTI) has been recorded in current earnings are shown separately below. The other component is the amortization from other comprehensive income of losses associated with pension benefits, which occurs as the losses are included in current net periodic pension cost. Unrealized Gains (Losses) on Securities (1) Pension Loss (2) Total Accumulated Other Comprehensive Income (In thousands) OTTI Other Balance January 1, 2015 $ 3,791 $ 81,310 $ (23,008 ) $ 62,093 Other comprehensive income (loss) before reclassifications (449 ) (19,988 ) — (20,437 ) Amounts reclassified from accumulated other comprehensive income 483 (2,813 ) 1,309 (1,021 ) Current period other comprehensive income (loss), before tax 34 (22,801 ) 1,309 (21,458 ) Income tax (expense) benefit (13 ) 8,664 (497 ) 8,154 Current period other comprehensive income (loss), net of tax 21 (14,137 ) 812 (13,304 ) Transfer of unrealized gain on securities for which impairment was not previously recognized 43 (43 ) — — Balance June 30, 2015 $ 3,855 $ 67,130 $ (22,196 ) $ 48,789 Balance January 1, 2014 $ 4,203 $ 21,303 $ (15,775 ) $ 9,731 Other comprehensive income (loss) before reclassifications (803 ) 115,774 — 114,971 Amounts reclassified from accumulated other comprehensive income 977 3,627 720 5,324 Current period other comprehensive income, before tax 174 119,401 720 120,295 Income tax expense (66 ) (45,372 ) (274 ) (45,712 ) Current period other comprehensive income, net of tax 108 74,029 446 74,583 Balance June 30, 2014 $ 4,311 $ 95,332 $ (15,329 ) $ 84,314

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2015
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. (In thousands) Consumer Commercial Wealth Segment Totals Other/Elimination Consolidated Totals Three Months Ended June 30, 2015 Net interest income $ 66,517 $ 73,631 $ 10,739 $ 150,887 $ 12,770 $ 163,657 Provision for loan losses (8,572 ) (201 ) 1 (8,772 ) 2,015 (6,757 ) Non-interest income 30,206 49,618 34,737 114,561 (469 ) 114,092 Investment securities gains, net — — — — 2,143 2,143 Non-interest expense (67,587 ) (65,714 ) (27,004 ) (160,305 ) (5,015 ) (165,320 ) Income before income taxes $ 20,564 $ 57,334 $ 18,473 $ 96,371 $ 11,444 $ 107,815 Six Months Ended June 30, 2015 Net interest income $ 132,182 $ 144,378 $ 21,530 $ 298,090 $ 11,705 $ 309,795 Provision for loan losses (16,895 ) 676 8 (16,211 ) 5,034 (11,177 ) Non-interest income 56,600 97,199 68,294 222,093 (1,575 ) 220,518 Investment securities gains, net — — — — 8,178 8,178 Non-interest expense (134,250 ) (130,317 ) (54,287 ) (318,854 ) (10,163 ) (329,017 ) Income before income taxes $ 37,637 $ 111,936 $ 35,545 $ 185,118 $ 13,179 $ 198,297 Three Months Ended June 30, 2014 Net interest income $ 66,440 $ 71,301 $ 9,991 $ 147,732 $ 12,761 $ 160,493 Provision for loan losses (8,312 ) 323 533 (7,456 ) (99 ) (7,555 ) Non-interest income 28,825 47,533 31,507 107,865 898 108,763 Investment securities losses, net — — — — (2,558 ) (2,558 ) Non-interest expense (66,366 ) (63,048 ) (23,991 ) (153,405 ) (9,148 ) (162,553 ) Income before income taxes $ 20,587 $ 56,109 $ 18,040 $ 94,736 $ 1,854 $ 96,590 Six Months Ended June 30, 2014 Net interest income $ 131,968 $ 142,387 $ 19,902 $ 294,257 $ 19,302 $ 313,559 Provision for loan losses (17,510 ) (60 ) 492 (17,078 ) (137 ) (17,215 ) Non-interest income 54,632 94,637 61,502 210,771 619 211,390 Investment securities gains, net — — — — 7,479 7,479 Non-interest expense (131,320 ) (124,681 ) (48,773 ) (304,774 ) (19,741 ) (324,515 ) Income before income taxes $ 37,770 $ 112,283 $ 33,123 $ 183,176 $ 7,522 $ 190,698

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Derivative Instrument Detail [Abstract]
Schedule Of Notional Amounts Of Derivative Instruments	(In thousands) June 30, 2015 December 31, 2014 Interest rate swaps $ 874,809 $ 647,709 Interest rate caps 49,914 53,587 Credit risk participation agreements 75,484 75,943 Foreign exchange contracts 13,047 19,791 Mortgage loan commitments 13,683 — Mortgage loan forward sale contracts 6,267 — Forward TBA contracts 13,000 — Total notional amount $ 1,046,204 $ 797,030
Schedule Of Fair Values Of Derivative Instruments	The fair values of the Company's derivative instruments, whose notional amounts are listed above, are shown in the table below. Derivative instruments with a positive fair value (asset derivatives) are reported in other assets in the consolidated balance sheets, while derivative instruments with a negative fair value (liability derivatives) are reported in other liabilities in the consolidated balance sheets. Information about the valuation methods used to determine fair value is provided in Note 13 on Fair Value Measurements. Asset Derivatives Liability Derivatives June 30, 2015 Dec. 31, 2014 June 30, 2015 Dec. 31, 2014 (In thousands ) Fair Value Fair Value Derivative instruments: Interest rate swaps $ 10,067 $ 10,144 $ (10,067 ) $ (10,166 ) Interest rate caps 30 62 (30 ) (62 ) Credit risk participation agreements 2 3 (177 ) (226 ) Foreign exchange contracts 109 248 (33 ) (494 ) Mortgage loan commitments 353 — (8 ) — Mortgage loan forward sale contracts 14 — (13 ) — Forward TBA contracts 46 — (20 ) — Total $ 10,621 $ 10,457 $ (10,348 ) $ (10,948 )
Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income	The effects of derivative instruments on the consolidated statements of income are shown in the table below. Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives For the Three Months Ended June 30 For the Six Months Ended June 30 (In thousands) 2015 2014 2015 2014 Derivative instruments: Interest rate swaps Other non-interest income $ 1,627 $ 366 $ 2,810 $ 811 Credit risk participation agreements Other non-interest income 75 93 48 198 Foreign exchange contracts Other non-interest income 761 128 322 (42 ) Mortgage loan commitments Loan fees and sales (63 ) — 345 — Mortgage loan forward sale contracts Loan fees and sales 4 — 1 — Forward TBA contracts Loan fees and sales 390 — 385 — Total $ 2,794 $ 587 $ 3,911 $ 967
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 Collateral Received/Pledged Net Amount June 30, 2015 Assets: Derivatives subject to master netting agreements $ 10,145 $ — $ 10,145 $ (45 ) $ — $ 10,100 Derivatives not subject to master netting agreements 476 — 476 Total derivatives 10,621 — 10,621 Liabilities: Derivatives subject to master netting agreements $ 10,294 $ — $ 10,294 $ (45 ) $ (7,580 ) $ 2,669 Derivatives not subject to master netting agreements 54 — 54 Total derivatives 10,348 — 10,348 December 31, 2014 Assets: Derivatives subject to master netting agreements $ 10,209 $ — $ 10,209 $ (251 ) $ — $ 9,958 Derivatives not subject to master netting agreements 248 — 248 Total derivatives 10,457 — 10,457 Liabilities: Derivatives subject to master netting agreements $ 10,454 $ — $ 10,454 $ (251 ) $ (8,738 ) $ 1,465 Derivatives not subject to master netting agreements 494 — 494 Total derivatives 10,948 — 10,948

Resale and Repurchase Agreeme32

Resale and Repurchase Agreements (Tables)	6 Months Ended
	Jun. 30, 2015
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 Securities Collateral Received/Pledged Net Amount June 30, 2015 Total resale agreements, subject to master netting arrangements $ 1,500,000 $ (450,000 ) $ 1,050,000 $ — $ (1,050,000 ) $ — Total repurchase agreements, subject to master netting arrangements 2,115,693 (450,000 ) 1,665,693 — (1,665,693 ) — December 31, 2014 Total resale agreements, subject to master netting arrangements $ 1,500,000 $ (450,000 ) $ 1,050,000 $ — $ (1,049,370 ) $ 630 Total repurchase agreements, subject to master netting arrangements 2,308,678 (450,000 ) 1,858,678 — (1,858,678 ) —
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 June 30, 2015 Repurchase agreements, secured by: U.S. government and federal agency obligations $ 124,241 $ 24,799 $ 10,219 $ 159,259 Government-sponsored enterprise obligations 349,799 41,830 22,122 413,751 Agency mortgage-backed securities 340,790 103,537 324,659 768,986 Asset-backed securities 653,697 120,000 — 773,697 Total repurchase agreements, gross amount recognized $ 1,468,527 $ 290,166 $ 357,000 $ 2,115,693

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2015
Share-based Compensation [Abstract]
Summary Of The Status Of Nonvested Share Awards	A summary of the status of the Company’s nonvested share awards as of June 30, 2015 , and changes during the six month period then ended, is presented below. Shares Weighted Average Grant Date Fair Value Nonvested at January 1, 2015 1,259,689 $34.41 Granted 208,623 41.60 Vested (136,747 ) 29.95 Forfeited (8,368 ) 34.46 Nonvested at June 30, 2015 1,323,197 $36.00
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The current year per share average fair value and the model assumptions are shown in the table below. Weighted per share average fair value at grant date $7.58 Assumptions: Dividend yield 2.2 % Volatility 21.3 % Risk-free interest rate 1.8 % Expected term 7.2 years
Summary Of Option Activity	A summary of option activity during the first six months of 2015 is presented below. (Dollars in thousands, except per share data) Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2015 68,675 $29.27 Granted — — Forfeited — — Expired — — Exercised (67,865 ) 29.25 Outstanding at June 30, 2015 810 $31.26 0.2 years $ 13
Summary Of SAR Activity	A summary of SAR activity during the first six months of 2015 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, 2015 1,780,578 $33.96 Granted 240,267 41.40 Forfeited (3,485 ) 39.37 Expired (668 ) 37.33 Exercised (362,378 ) 32.88 Outstanding at June 30, 2015 1,654,314 $35.27 4.5 years $ 19,029

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Measurements [Abstract]
Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The table below presents the June 30, 2015 and December 31, 2014 carrying values of assets and liabilities measured at fair value on a recurring basis. There were no transfers among levels during the first six months of 2015 or the year ended December 31, 2014 . 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) June 30, 2015 Assets: Residential mortgage loans held for sale $ 7,852 $ — $ 7,852 $ — Available for sale securities: U.S. government and federal agency obligations 434,866 434,866 — — Government-sponsored enterprise obligations 886,501 — 886,501 — State and municipal obligations 1,817,101 — 1,724,161 92,940 Agency mortgage-backed securities 2,587,693 — 2,587,693 — Non-agency mortgage-backed securities 690,938 — 690,938 — Asset-backed securities 2,498,506 — 2,498,506 — Other debt securities 265,107 — 265,107 — Equity securities 41,109 20,272 20,837 — Trading securities 18,971 — 18,971 — Private equity investments 58,726 — — 58,726 Derivatives * 10,621 — 10,266 355 Assets held in trust 9,375 9,375 — — Total assets $ 9,327,366 $ 464,513 $ 8,710,832 $ 152,021 Liabilities: Derivatives * $ 10,348 $ — $ 10,163 $ 185 Total liabilities $ 10,348 $ — $ 10,163 $ 185 December 31, 2014 Assets: Available for sale securities: U.S. government and federal agency obligations $ 501,407 $ 501,407 $ — $ — Government-sponsored enterprise obligations 963,127 — 963,127 — State and municipal obligations 1,813,201 — 1,718,058 95,143 Agency mortgage-backed securities 2,593,708 — 2,593,708 — Non-agency mortgage-backed securities 382,744 — 382,744 — Asset-backed securities 3,091,993 — 3,091,993 — Other debt securities 139,161 — 139,161 — Equity securities 38,219 17,975 20,244 — Trading securities 15,357 — 15,357 — Private equity investments 57,581 — — 57,581 Derivatives * 10,457 — 10,454 3 Assets held in trust 8,848 8,848 — — Total assets $ 9,615,803 $ 528,230 $ 8,934,846 $ 152,727 Liabilities: Derivatives * $ 10,948 $ — $ 10,722 $ 226 Total liabilities $ 10,948 $ — $ 10,722 $ 226
Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis	Assets held in an outside trust for the Company’s deferred compensation plan consist of investments in mutual funds. The fair value measurements are based on quoted prices in active markets and classified as Level 1. The Company has recorded an asset representing the total investment amount. The Company has also recorded a corresponding nonfinancial liability, representing the Company’s liability to the plan participants. 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 June 30, 2015 Balance March 31, 2015 $ 93,271 $ 61,162 $ 158 $ 154,591 Total gains or losses (realized/unrealized): Included in earnings — 875 12 887 Included in other comprehensive income * (352 ) — — (352 ) Discount accretion 21 — — 21 Purchases of private equity investments — 1,437 — 1,437 Sale/pay down of private equity investments — (4,800 ) — (4,800 ) Capitalized interest/dividends — 52 — 52 Balance June 30, 2015 $ 92,940 $ 58,726 $ 170 $ 151,836 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 June 30, 2015 $ — $ 875 $ 420 $ 1,295 For the six months ended June 30, 2015 Balance January 1, 2015 $ 95,143 $ 57,581 $ (223 ) $ 152,501 Total gains or losses (realized/unrealized): Included in earnings — 4,175 393 4,568 Included in other comprehensive income * (354 ) — — (354 ) Investment securities called (2,000 ) — — (2,000 ) Discount accretion 151 — — 151 Purchases of private equity investments — 1,653 — 1,653 Sale/pay down of private equity investments — (4,800 ) — (4,800 ) Capitalized interest/dividends — 117 — 117 Balance June 30, 2015 $ 92,940 $ 58,726 $ 170 $ 151,836 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2015 $ — $ 4,175 $ 393 $ 4,568 For the three months ended June 30, 2014 Balance March 31, 2014 $ 126,979 $ 76,446 $ (67 ) $ 203,358 Total gains or losses (realized/unrealized): Included in earnings — (4,858 ) 93 (4,765 ) Included in other comprehensive income * 5,088 — — 5,088 Discount accretion 41 — — 41 Purchases of private equity investments — 4,000 — 4,000 Sale/pay down of private equity investments — (31,409 ) — (31,409 ) Capitalized interest/dividends — 13 — 13 Sale of risk participation agreement — — (214 ) (214 ) Balance June 30, 2014 $ 132,108 $ 44,192 $ (188 ) $ 176,112 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 June 30, 2014 $ — $ (4,858 ) $ 89 $ (4,769 ) For the six months ended June 30, 2014 Balance January 1, 2014 $ 127,724 $ 56,612 $ (65 ) $ 184,271 Total gains or losses (realized/unrealized): Included in earnings — 11,936 198 12,134 Included in other comprehensive income * 4,304 — — 4,304 Discount accretion 80 — — 80 Purchases of private equity investments — 7,000 — 7,000 Sale/pay down of private equity investments — (31,423 ) — (31,423 ) Capitalized interest/dividends — 67 — 67 Sale of risk participation agreement — — (321 ) (321 ) Balance June 30, 2014 $ 132,108 $ 44,192 $ (188 ) $ 176,112 Total gains or losses for the six months included in earnings attributable to the change in unrealized gains or losses relating to assets still held at June 30, 2014 $ — $ (6,457 ) $ 194 $ (6,263 )
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 June 30, 2015 Total gains or losses included in earnings $ (63 ) $ 75 $ 875 $ 887 Change in unrealized gains or losses relating to assets still held at June 30, 2015 $ 345 $ 75 $ 875 $ 1,295 For the six months ended June 30, 2015 Total gains or losses included in earnings $ 345 $ 48 $ 4,175 $ 4,568 Change in unrealized gains or losses relating to assets still held at June 30, 2015 $ 345 $ 48 $ 4,175 $ 4,568 For the three months ended June 30, 2014 Total gains or losses included in earnings $ — $ 93 $ (4,858 ) $ (4,765 ) Change in unrealized gains or losses relating to assets still held at June 30, 2014 $ — $ 89 $ (4,858 ) $ (4,769 ) For the six months ended June 30, 2014 Total gains or losses included in earnings $ — $ 198 $ 11,936 $ 12,134 Change in unrealized gains or losses relating to assets still held at June 30, 2014 $ — $ 194 $ (6,457 ) $ (6,263 )
Summary Of Quantitative Information About Level 3 Fair Value Measurements	s As shown above, 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 $92.9 million at June 30, 2015 , while private equity investments, included in non-marketable securities, totaled $58.7 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 3 - 5 years Estimated market rate 2.0% - 5.0% Private equity investments Market comparable companies EBITDA multiple 4.0 - 5.5 Mortgage loan commitments Discounted cash flow Probability of funding 64.7% - 100.0% 85.2% Embedded servicing value .7% - 1.0% 1.0%
Schedule Of Fair Value Disclosures Measured On Nonrecurring Basis [Table Text Block]	s For assets measured at fair value on a nonrecurring basis during the first six months of 2015 and 2014 , and still held as of June 30, 2015 and 2014 , 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 June 30, 2015 and 2014 . 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 Six Months Ended June 30 June 30, 2015 Collateral dependent impaired loans $ 3,897 $ — $ — $ 3,897 $ (1,340 ) Mortgage servicing rights 1,242 — — 1,242 53 Foreclosed assets 608 — — 608 (162 ) Long-lived assets 2,425 — — 2,425 (1,667 ) June 30, 2014 Collateral dependent impaired loans $ 10,603 $ — $ — $ 10,603 $ (3,124 ) Private equity investments 1,309 — — 1,309 (1,191 ) Mortgage servicing rights 793 — — 793 1 Foreclosed assets 1,191 — — 1,191 (319 ) Long-lived assets 7,246 — — 7,246 (1,408 )

Fair Value Of Financial Instr35

Fair Value Of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Of Financial Instruments [Abstract]
Fair value of financial instruments [Table Text Block]	Fair Value Hierarchy Level June 30, 2015 December 31, 2014 (In thousands) Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Financial Assets Loans: Business Level 3 $ 4,267,997 $ 4,282,667 $ 3,969,952 $ 3,982,531 Real estate - construction and land Level 3 448,887 454,531 403,507 407,905 Real estate - business Level 3 2,276,231 2,308,581 2,288,215 2,315,378 Real estate - personal Level 3 1,901,671 1,932,967 1,883,092 1,933,456 Consumer Level 3 1,848,457 1,843,240 1,705,134 1,701,037 Revolving home equity Level 3 430,880 433,447 430,873 433,508 Consumer credit card Level 3 750,731 763,226 782,370 794,929 Overdrafts Level 3 3,627 3,627 6,095 6,095 Loans held for sale Level 2 7,852 7,852 — — Investment securities: Available for sale Level 1 455,138 455,138 519,382 519,382 Available for sale Level 2 8,673,743 8,673,743 8,909,035 8,909,035 Available for sale Level 3 92,940 92,940 95,143 95,143 Trading Level 2 18,971 18,971 15,357 15,357 Non-marketable Level 3 108,346 108,346 106,875 106,875 Federal funds sold Level 1 26,875 26,875 32,485 32,485 Securities purchased under agreements to resell Level 3 1,050,000 1,050,400 1,050,000 1,048,866 Interest earning deposits with banks Level 1 264,683 264,683 600,744 600,744 Cash and due from banks Level 1 409,791 409,791 467,488 467,488 Derivative instruments Level 2 10,266 10,266 10,454 10,454 Derivative instruments Level 3 355 355 3 3 Financial Liabilities Non-interest bearing deposits Level 1 $ 6,886,509 $ 6,886,509 $ 6,811,959 $ 6,811,959 Savings, interest checking and money market deposits Level 1 10,369,031 10,369,031 10,541,601 10,541,601 Time open and certificates of deposit Level 3 2,033,169 2,031,121 2,122,218 2,121,114 Federal funds purchased Level 1 350 350 3,840 3,840 Securities sold under agreements to repurchase Level 3 1,665,693 1,665,751 1,858,678 1,858,731 Other borrowings Level 3 103,843 110,087 104,058 111,102 Derivative instruments Level 2 10,163 10,163 10,722 10,722 Derivative instruments Level 3 185 185 226 226

Principles Of Consolidation A36

Principles Of Consolidation And Presentation Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amortization Method Qualified Affordable Housing Project Investments Amortization	$ 995	$ 756

Loans And Allowance For Loan 37

Loans And Allowance For Loan Losses (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Abstract]
Loans pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits	$ 3,500,000
Loans Pledged to the Federal Reserve Bank as collateral for discount window borrowings	1,300,000
Troubled Debt Restructured Loans	45,400
Accruing Restructured Loans	28,931	$ 40,313
Restructured Loans NonAccrual	16,400
Restructured loans performing under their modified terms	10,900
Aggregate restructured credit card loans held	9,100
Restructured Loans Due to Bankruptcy Proceeding	$ 8,500
Period after which loans are deemed in default (in days)	90 days
Effect on Interest Income Resulting From Modification to Credit Card Loans	$ (1,000)
Commitments to lend additional funds to customers with restructured loans	2,200
Fair Value of Personal Real Estate Loans Held for Sale	7,900
Unpaid Principal Balance on Personal Real Estate Loans Held for Sale	7,800
Foreclosed real estate	4,200	5,500
Personal property acquired in repossession	$ 2,800	$ 2,400

Loans And Allowance For Loan 38

Loans And Allowance For Loan Losses (Summary Classification Of Held To Maturity Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 11,928,481	$ 11,469,238
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	4,267,997	3,969,952
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	448,887	403,507
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	2,276,231	2,288,215
Personal Banking Portfolio Segment [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	1,901,671	1,883,092
Personal Banking Portfolio Segment [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	1,848,457	1,705,134
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	430,880	430,873
Personal Banking Portfolio Segment [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	750,731	782,370
Personal Banking Portfolio Segment [Member] | Overdrafts [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 3,627	$ 6,095

Loans And Allowance For Loan 39

Loans And Allowance For Loan Losses (Summary Of Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 153,532	$ 161,532	$ 156,532	$ 161,532
Provision	6,757	7,555	11,177	17,215
Loans charged off	12,705	12,970	25,005	26,851
Less recoveries on loans	3,948	5,415	8,828	9,636
Net loan charge-offs	8,757	7,555	16,177	17,215
Balance at end of period	151,532	161,532	151,532	161,532
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	88,906	97,881	89,622	94,189
Provision	(2,361)	486	(4,113)	4,553
Loans charged off	1,408	1,218	2,132	2,348
Less recoveries on loans	1,192	1,779	2,952	2,534
Net loan charge-offs	216	(561)	(820)	(186)
Balance at end of period	86,329	98,928	86,329	98,928
Personal Banking Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	64,626	63,651	66,910	67,343
Provision	9,118	7,069	15,290	12,662
Loans charged off	11,297	11,752	22,873	24,503
Less recoveries on loans	2,756	3,636	5,876	7,102
Net loan charge-offs	8,541	8,116	16,997	17,401
Balance at end of period	$ 65,203	$ 62,604	$ 65,203	$ 62,604

Loans And Allowance For Loan 40

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	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Line Items]
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	$ 11,872,905	$ 11,388,150
Impaired Financing Receivable, Recorded Investment	55,576	81,088
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	147,776	149,691
Impaired Financing Receivable, Related Allowance	3,756	6,841
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	6,961,839	6,606,123
Impaired Financing Receivable, Recorded Investment	31,276	55,551
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	84,386	85,095
Impaired Financing Receivable, Related Allowance	1,943	4,527
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans And Leases Receivable Excluding Impaired Financing Receivables Recorded Investment	4,911,066	4,782,027
Impaired Financing Receivable, Recorded Investment	24,300	25,537
Loans and Leases Receivable Allowance Excluding Impaired Financing Receivable Related Allowance	63,390	64,596
Impaired Financing Receivable, Related Allowance	$ 1,813	$ 2,314

Loans And Allowance For Loan 41

Loans And Allowance For Loan Losses (Investment In Impaired Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Abstract]
Non-accrual loans	$ 26,645	$ 40,775
Restructured loans (accruing)	28,931	40,313
Total impaired loans	$ 55,576	$ 81,088

Loans And Allowance For Loan 42

Loans And Allowance For Loan Losses (Additional Information About Impaired Loans Held) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 15,712	$ 28,469
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	24,909	38,667
Impaired Financing Receivable, with Related Allowance, Recorded Investment	39,864	52,619
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	50,754	66,160
Impaired Financing Receivable, Related Allowance	3,756	6,841
Impaired Financing Receivable, Recorded Investment	55,576	81,088
Impaired Financing Receivable, Unpaid Principal Balance	75,663	104,827
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	9,779	9,237
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	11,911	11,532
Impaired Financing Receivable, with Related Allowance, Recorded Investment	7,303	12,326
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	9,408	13,846
Impaired Financing Receivable, Related Allowance	836	1,844
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,102	4,552
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	8,554	8,493
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,658	8,148
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,129	9,610
Impaired Financing Receivable, Related Allowance	321	1,081
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,213	13,453
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	3,629	17,258
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,221	7,835
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	9,299	15,025
Impaired Financing Receivable, Related Allowance	786	1,602
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	618	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	815	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	8,710	9,096
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	11,832	12,465
Impaired Financing Receivable, Related Allowance	1,030	1,441
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,378	4,244
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,492	4,244
Impaired Financing Receivable, Related Allowance	91	50
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	1,227
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	1,384
Impaired Financing Receivable, with Related Allowance, Recorded Investment	523	529
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	523	529
Impaired Financing Receivable, Related Allowance	21	9
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	9,071	10,441
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	9,071	10,441
Impaired Financing Receivable, Related Allowance	$ 671	$ 814

Loans And Allowance For Loan 43

Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 31,011	$ 43,039	$ 34,257	$ 45,440
Restructured loans (accruing)	33,222	60,912	37,421	60,371
Total	64,233	103,951	71,678	105,811
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	25,063	35,908	28,155	38,093
Restructured loans (accruing)	14,254	40,167	18,245	39,285
Total	39,317	76,075	46,400	77,378
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	5,948	7,131	6,102	7,347
Restructured loans (accruing)	18,968	20,745	19,176	21,086
Total	$ 24,916	$ 27,876	$ 25,278	$ 28,433

Loans And Allowance For Loan 44

Loans And Allowance For Loan Losses (Interest Income Recognized on Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 417	$ 733	$ 831	$ 1,462
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	42	181	84	361
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	42	142	84	283
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	15	46	30	91
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	48	58	96	115
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	85	71	169	142
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	6	7	11	14
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 179	$ 228	$ 357	$ 456

Loans And Allowance For Loan 45

Loans And Allowance For Loan Losses (Aging Information On Past Due And Accruing Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	$ 11,840,177	$ 11,365,009
30 - 89 Days Past Due	47,441	49,796
90 Days Past Due and Still Accruing	14,218	13,658
Non-accrual	26,645	40,775
Total	11,928,481	11,469,238
Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	4,252,087	3,946,144
30 - 89 Days Past Due	3,643	11,152
90 Days Past Due and Still Accruing	411	1,096
Non-accrual	11,856	11,560
Total	4,267,997	3,969,952
Real Estate - Construction And Land [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	438,905	397,488
30 - 89 Days Past Due	4,903	827
90 Days Past Due and Still Accruing	1,479	35
Non-accrual	3,600	5,157
Total	448,887	403,507
Real Estate - Business [Member] | Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	2,264,297	2,266,688
30 - 89 Days Past Due	6,291	3,661
90 Days Past Due and Still Accruing	0	0
Non-accrual	5,643	17,866
Total	2,276,231	2,288,215
Real Estate - Personal [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	1,885,544	1,868,606
30 - 89 Days Past Due	8,480	6,618
90 Days Past Due and Still Accruing	2,201	1,676
Non-accrual	5,446	6,192
Total	1,901,671	1,883,092
Consumer [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	1,832,142	1,687,285
30 - 89 Days Past Due	14,179	16,053
90 Days Past Due and Still Accruing	2,036	1,796
Non-accrual	100	0
Total	1,848,457	1,705,134
Revolving Home Equity [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	427,644	428,478
30 - 89 Days Past Due	1,912	1,552
90 Days Past Due and Still Accruing	1,324	843
Non-accrual	0	0
Total	430,880	430,873
Consumer Credit Card [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	736,213	764,599
30 - 89 Days Past Due	7,751	9,559
90 Days Past Due and Still Accruing	6,767	8,212
Non-accrual	0	0
Total	750,731	782,370
Overdrafts [Member] | Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due	3,345	5,721
30 - 89 Days Past Due	282	374
90 Days Past Due and Still Accruing	0	0
Non-accrual	0	0
Total	$ 3,627	$ 6,095

Loans And Allowance For Loan 46

Loans And Allowance For Loan Losses (Credit Quality Of Commercial Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	$ 6,993,115	$ 6,661,674
Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	6,828,866	6,441,941
Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	63,274	107,437
Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	79,876	77,713
Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	21,099	34,583
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	4,267,997	3,969,952
Business [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	4,179,038	3,871,569
Business [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	46,321	62,904
Business [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	30,782	23,919
Business [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	11,856	11,560
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	448,887	403,507
Real Estate - Construction And Land [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	439,769	385,831
Real Estate - Construction And Land [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	1,111	3,865
Real Estate - Construction And Land [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	4,407	8,654
Real Estate - Construction And Land [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	3,600	5,157
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	2,276,231	2,288,215
Real Estate - Business [Member] | Pass [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	2,210,059	2,184,541
Real Estate - Business [Member] | Special Mention [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	15,842	40,668
Real Estate - Business [Member] | Substandard [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	44,687	45,140
Real Estate - Business [Member] | Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	$ 5,643	$ 17,866

Loans And Allowance For Loan 47

Loans And Allowance For Loan Losses (Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding ) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Loans And Allowance For Loan Losses [Line Items]
Credit Quality Personal Real Estate Loans Excluded	$ 246.3	$ 244.3
Credit quality personal banking loan table percentage loans excluded	5.00%
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	1.60%	1.40%
Real Estate - Personal [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.20%	3.10%
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	9.70%	9.90%
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	26.80%	26.70%
Real Estate - Personal [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	58.70%	58.90%
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer [Member] | Fico Under Six Hundred [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.80%	5.20%
Consumer [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	9.70%	10.20%
Consumer [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	22.50%	22.90%
Consumer [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	26.90%	28.00%
Consumer [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	36.10%	33.70%
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	1.80%	1.80%
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	3.90%	4.40%
Revolving Home Equity [Member] | Fico Six Hundred Sixty To Seven Hundred Nineteen [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	13.30%	13.70%
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	25.70%	32.80%
Revolving Home Equity [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	55.30%	47.30%
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	3.90%	4.10%
Consumer Credit Card [Member] | Fico Six Hundred To Six Hundred Fifty Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.70%	11.80%
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	32.40%	32.40%
Consumer Credit Card [Member] | Fico Seven Hundred Twenty To Seven Hundred Seventy Nine [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	28.00%	27.80%
Consumer Credit Card [Member] | Fico Seven Hundred Eighty And Above [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	24.00%	23.90%

Loans And Allowance For Loan 48

Loans And Allowance For Loan Losses (Outstanding Balance Of Loans Classified As Troubled Debt Restructurings) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	$ 45,361
Balance 90 days past due at any time during previous 12 months	1,241
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	14,945
Balance 90 days past due at any time during previous 12 months	0
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	6,418
Balance 90 days past due at any time during previous 12 months	181
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	3,495
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]
Restructured loans	5,606
Balance 90 days past due at any time during previous 12 months	192
Personal Banking Portfolio Segment [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	5,303
Balance 90 days past due at any time during previous 12 months	84
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	523
Balance 90 days past due at any time during previous 12 months	91
Personal Banking Portfolio Segment [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	9,071
Balance 90 days past due at any time during previous 12 months	$ 693

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)Securities	Dec. 31, 2014USD ($)Securities	Jun. 30, 2014USD ($)	Dec. 31, 2013USD ($)
Investment [Line Items]
Non-marketable FHLB and FRB stock held for debt and regulatory purposes	$ 46,700	$ 46,600
Non-marketable private equity investments held	61,300	60,200
U.S. Treasury inflation-protected securities held	$ 434,800
Percentage decrease requiring a review for impairment	20.00%
Fair value of securities on other-than-temporary impairment watch list	$ 109,200	123,900
Credit-related portion of impairments included in earnings, for securities on watch list	$ 14,166	$ 13,734	$ 13,410	$ 12,499
Number of individual securities held in the available for sale portfolio | Securities	2,000
Securities in Unrealized Loss Positions, Number of Positions | Securities	514	363
Fair value of securities in an unrealized loss position	$ 3,179,502	$ 3,262,858
AFS securities in loss position at period-end, change in unrealized loss	6,300
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 41,687	35,384
Minimum period that OTTI securities have been in a loss position	12 months
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 852,554	1,137,135
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Percent of Portfolio	9.20%
Securities pledged as collateral	$ 4,600,000
Securities pledged as collateral and may be sold or re-pledged	$ 465,500
Number of investments in a single issuer that exceed 10% of stockholder's equity	0
No investment in a single issuer exceeds this percentage of stockholder's equity	10.00%
State And Municipal Obligations [Member]
Investment [Line Items]
Auction rate securities held at fair value	$ 92,900
Fair value of securities in an unrealized loss position	639,748	388,682
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	13,183	8,354
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	124,227	215,702
Unrealized losses included in auction rate securities held	6,000
Unrealized losses included in other state and municipal obligations held	7,200
Aggregate fair value of state and municipal obligations excluding auction rate securities	$ 1,700,000
State and municipal obligation portfolio, excluding auction rate securities, as a percentage of total available for sale securities	18.70%
Equity Securities [Member]
Investment [Line Items]
Common stock held by the holding company	$ 41,100
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Fair value of securities on other-than-temporary impairment watch list	50,700
Credit-related portion of impairments included in earnings, for securities on watch list	14,200
Fair value of securities in an unrealized loss position	424,049	185,314
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,255	1,228
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 54,265	$ 43,659

Investment Securities (Investme

Investment Securities (Investment Securities, At Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment Securities [Abstract]
Available for sale securities	$ 9,221,821	$ 9,523,560
Trading securities	18,971	15,357
Non-marketable	108,346	106,875
Total investment securities	$ 9,349,138	$ 9,645,792

Investment Securities (Summary

Investment Securities (Summary Of Available For Sale Investment Securities By Maturity Groupings) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Amortized Cost	$ 9,107,330	$ 9,386,302
Fair Value	9,221,821	9,523,560
U.S. Government And Federal Agency Obligations [Member]
Investment [Line Items]
Amortized Cost	427,621	497,336
Fair Value	434,866	501,407
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	90,775
Fair Value	91,331
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	167,145
Fair Value	174,685
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	117,077
Fair Value	119,760
U.S. Government And Federal Agency Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	52,624
Fair Value	49,090
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Amortized Cost	888,270	968,574
Fair Value	886,501	963,127
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	43,033
Fair Value	43,300
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	481,824
Fair Value	484,932
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	357,783
Fair Value	352,912
Government-Sponsored Enterprise Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	5,630
Fair Value	5,357
State And Municipal Obligations [Member]
Investment [Line Items]
Amortized Cost	1,807,584	1,789,215
Fair Value	1,817,101	1,813,201
State And Municipal Obligations [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	139,111
Fair Value	139,708
State And Municipal Obligations [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	657,544
Fair Value	673,868
State And Municipal Obligations [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	851,707
Fair Value	848,846
State And Municipal Obligations [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	159,222
Fair Value	154,679
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,531,365	2,523,377
Fair Value	2,587,693	2,593,708
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	682,114	372,911
Fair Value	690,938	382,744
Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,494,905	3,090,174
Fair Value	2,498,506	3,091,993
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	5,708,384	5,986,462
Fair Value	5,777,137	6,068,445
Other Debt Securities [Member]
Investment [Line Items]
Amortized Cost	269,793	140,784
Fair Value	265,107	139,161
Other Debt Securities [Member] | Available For Sale Securities Maturity Within1 Year [Member]
Investment [Line Items]
Amortized Cost	3,999
Fair Value	4,063
Other Debt Securities [Member] | Available For Sale Securities Maturity After1 But Within5 Years [Member]
Investment [Line Items]
Amortized Cost	62,023
Fair Value	62,069
Other Debt Securities [Member] | Available For Sale Securities Maturity After5 But Within10 Years [Member]
Investment [Line Items]
Amortized Cost	191,771
Fair Value	187,374
Other Debt Securities [Member] | Available For Sale Maturity After10 Years [Member]
Investment [Line Items]
Amortized Cost	12,000
Fair Value	11,601
Equity Securities [Member]
Investment [Line Items]
Amortized Cost	5,678	3,931
Fair Value	$ 41,109	$ 38,219

Investment Securities (Availabl

Investment Securities (Available For Sale Securities Unrealized Gains And Losses, By Security Type) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Amortized Cost	$ 9,107,330	$ 9,386,302
Gross unreailzed gain in accumulated other comprehensive income at period end	156,178	172,642
Gross unreailzed losses in accumulated other comprehensive income at period end	(41,687)	(35,384)
Fair Value	9,221,821	9,523,560
U.S. Government And Federal Agency Obligations [Member]
Investment [Line Items]
Amortized Cost	427,621	497,336
Gross unreailzed gain in accumulated other comprehensive income at period end	11,597	9,095
Gross unreailzed losses in accumulated other comprehensive income at period end	(4,352)	(5,024)
Fair Value	434,866	501,407
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Amortized Cost	888,270	968,574
Gross unreailzed gain in accumulated other comprehensive income at period end	4,462	2,593
Gross unreailzed losses in accumulated other comprehensive income at period end	(6,231)	(8,040)
Fair Value	886,501	963,127
State And Municipal Obligations [Member]
Investment [Line Items]
Amortized Cost	1,807,584	1,789,215
Gross unreailzed gain in accumulated other comprehensive income at period end	22,700	32,340
Gross unreailzed losses in accumulated other comprehensive income at period end	(13,183)	(8,354)
Fair Value	1,817,101	1,813,201
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,531,365	2,523,377
Gross unreailzed gain in accumulated other comprehensive income at period end	63,083	75,923
Gross unreailzed losses in accumulated other comprehensive income at period end	(6,755)	(5,592)
Fair Value	2,587,693	2,593,708
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	682,114	372,911
Gross unreailzed gain in accumulated other comprehensive income at period end	11,079	11,061
Gross unreailzed losses in accumulated other comprehensive income at period end	(2,255)	(1,228)
Fair Value	690,938	382,744
Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	2,494,905	3,090,174
Gross unreailzed gain in accumulated other comprehensive income at period end	7,410	6,922
Gross unreailzed losses in accumulated other comprehensive income at period end	(3,809)	(5,103)
Fair Value	2,498,506	3,091,993
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Amortized Cost	5,708,384	5,986,462
Gross unreailzed gain in accumulated other comprehensive income at period end	81,572	93,906
Gross unreailzed losses in accumulated other comprehensive income at period end	(12,819)	(11,923)
Fair Value	5,777,137	6,068,445
Other Debt Securities [Member]
Investment [Line Items]
Amortized Cost	269,793	140,784
Gross unreailzed gain in accumulated other comprehensive income at period end	416	420
Gross unreailzed losses in accumulated other comprehensive income at period end	(5,102)	(2,043)
Fair Value	265,107	139,161
Equity Securities [Member]
Investment [Line Items]
Amortized Cost	5,678	3,931
Gross unreailzed gain in accumulated other comprehensive income at period end	35,431	34,288
Gross unreailzed losses in accumulated other comprehensive income at period end	0	0
Fair Value	$ 41,109	$ 38,219

Investment Securities (Cash Flo

Investment Securities (Cash Flow Model Inputs Used To Calculate Credit Losses) (Details)	Jun. 30, 2015
Minimum [Member]
Investment [Line Items]
Prepayment CPR	1.00%
Projected cumulative default	18.00%
Credit support	0.00%
Loss severity	21.00%
Maximum [Member]
Investment [Line Items]
Prepayment CPR	25.00%
Projected cumulative default	54.00%
Credit support	20.00%
Loss severity	63.00%

Investment Securities (Changes

Investment Securities (Changes In Recorded Credit Losses) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 14,166	$ 13,410	$ 13,734	$ 12,499
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	76	0
Credit losses on debt securities for which impairment was previously recognized	407	977
Increase in expected cash flows that are recognized over remaining life of security	$ (51)	$ (66)

Investment Securities (Securiti

Investment Securities (Securities With Unrealized Losses And Length Of Impairment Period) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Less than 12 months, Fair Value	$ 2,326,948	$ 2,125,723
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	15,806	5,488
12 months or longer, Fair Value	852,554	1,137,135
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	25,881	29,896
Total, Fair Value	3,179,502	3,262,858
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	41,687	35,384
U.S. Government And Federal Agency Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	24,495	90,261
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	482	818
12 months or longer, Fair Value	31,984	32,077
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3,870	4,206
Total, Fair Value	56,479	122,338
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	4,352	5,024
Government-Sponsored Enterprise Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	193,644	224,808
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	882	922
12 months or longer, Fair Value	157,187	224,779
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	5,349	7,118
Total, Fair Value	350,831	449,587
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	6,231	8,040
State And Municipal Obligations [Member]
Investment [Line Items]
Less than 12 months, Fair Value	515,521	172,980
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5,907	646
12 months or longer, Fair Value	124,227	215,702
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	7,276	7,708
Total, Fair Value	639,748	388,682
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	13,183	8,354
Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	214,715	55,128
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,417	429
12 months or longer, Fair Value	315,002	381,617
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	5,338	5,163
Total, Fair Value	529,717	436,745
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	6,755	5,592
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	369,784	141,655
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,861	609
12 months or longer, Fair Value	54,265	43,659
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	394	619
Total, Fair Value	424,049	185,314
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,255	1,228
Asset-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	806,300	1,424,457
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,259	2,009
12 months or longer, Fair Value	144,478	159,098
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2,550	3,094
Total, Fair Value	950,778	1,583,555
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	3,809	5,103
Total Mortgage And Asset-Backed Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	1,390,799	1,621,240
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4,537	3,047
12 months or longer, Fair Value	513,745	584,374
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8,282	8,876
Total, Fair Value	1,904,544	2,205,614
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	12,819	11,923
Debt Securities [Member]
Investment [Line Items]
Less than 12 months, Fair Value	202,489	16,434
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3,998	55
12 months or longer, Fair Value	25,411	80,203
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1,104	1,988
Total, Fair Value	227,900	96,637
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 5,102	$ 2,043

Investment Securities (State An

Investment Securities (State And Municipal Obligations, By State And Economic Sector) (Details) - Jun. 30, 2015 - yr	Total
Sector Classification, Texas [Member]
Investment [Line Items]
% of Portfolio	12.60%
Average Life (in years)	5.8
Average Rating (Moody's)	Aa2
Sector Classification, Florida [Member]
Investment [Line Items]
% of Portfolio	7.70%
Average Life (in years)	4
Average Rating (Moody's)	Aa3
Sector Classification Ohio [Member]
Investment [Line Items]
% of Portfolio	6.50%
Average Life (in years)	5.7
Average Rating (Moody's)	Aa2
Sector Classification New York [Member]
Investment [Line Items]
% of Portfolio	6.20%
Average Life (in years)	6.4
Average Rating (Moody's)	Aa2
Sector Classification, Washington [Member]
Investment [Line Items]
% of Portfolio	5.30%
Average Life (in years)	5.1
Average Rating (Moody's)	Aa2
Sector Classification, General Obligation [Member]
Investment [Line Items]
% of Portfolio	34.70%
Average Life (in years)	5.6
Average Rating (Moody's)	Aa2
Sector Classification, Lease [Member]
Investment [Line Items]
% of Portfolio	19.10%
Average Life (in years)	5.6
Average Rating (Moody's)	Aa3
Sector Classification, Housing [Member]
Investment [Line Items]
% of Portfolio	12.50%
Average Life (in years)	3.8
Average Rating (Moody's)	Aa1
Sector Classification, Transportation [Member]
Investment [Line Items]
% of Portfolio	12.10%
Average Life (in years)	4.8
Average Rating (Moody's)	A1
Sector Classification, Limited Tax [Member]
Investment [Line Items]
% of Portfolio	8.40%
Average Life (in years)	6.6
Average Rating (Moody's)	Aa2

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		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Investment [Line Items]
Proceeds from sales of available for sale securities				$ 675,870		$ 30,998
Proceeds from sales of non-marketable securities				7,332		32,901
Total proceeds	[1]			683,202		63,899
Investment securities gains (losses), net		$ 2,143	$ (2,558)	8,178	[1]	7,479	[1]
Available-for-sale Securities [Member]
Investment [Line Items]
Available-for-sale Securities, gross realized gains on sales				2,813		0
Available-for-sale Securities, gross realized loss on sales				0		(5,197)
Gain realized on donation				0		1,570
Other-than-temporary impairment recognized on debt securities				(483)		(977)
Non-Marketable [Member]
Investment [Line Items]
Gains realized on sales				1,673		1,472
Losses realized on sales				0		(134)
Fair value adjustments, net				$ 4,175		$ 10,745
[1]	Available for sale and non-marketable securities

Goodwill And Other Intangible58

Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 472	$ 549	$ 945	$ 1,100

Goodwill And Other Intangible59

Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Estimable Useful Lives) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 35,383	$ 34,963
Accumulated Amortization	(28,361)	(27,416)
Valuation Allowance	(44)	(97)
Net Amount	6,978	7,450
Core Deposit Premium [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,270	31,270
Accumulated Amortization	(25,534)	(24,698)
Valuation Allowance	0	0
Net Amount	5,736	6,572
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,113	3,693
Accumulated Amortization	(2,827)	(2,718)
Valuation Allowance	(44)	(97)
Net Amount	$ 1,242	$ 878

Goodwill And Other Intangible60

Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,015	$ 1,713
2,016	1,339
2,017	1,004
2,018	762
2,019	$ 629

Goodwill And Other Intangible61

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Goodwill and Intangible Assets [Roll Forward]
Amortization	$ (472)	$ (549)	$ (945)	$ (1,100)
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			(836)
Impairment reversal			0
Intangible Assets, Net (Including Goodwill)	5,736		5,736		6,572
Mortgage Servicing Rights [Member]
Goodwill and Intangible Assets [Roll Forward]
Originations			420
Amortization			(109)
Impairment reversal			53
Intangible Assets, Net (Including Goodwill)	$ 1,242		$ 1,242		$ 878

Goodwill And Other Intangible62

Goodwill And Other Intangible Assets (Schedule Of Goodwill Allocated By Operating Segments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
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	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Guarantor Obligations [Line Items]
Derivative Liabilities	$ (10,348)	$ (10,948)
Notional amount of underlying interest rate swaps associated with risk participation agreements	1,046,204	$ 797,030
Financial Standby Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Standby letters of credit, net liability	3,400
Contractual amount of letters of credit, guaranteed maximum potential future payments	330,400
Risk Participation Agreement [Member] | Indirect Guarantee Of Indebtedness [Member]
Guarantor Obligations [Line Items]
Derivative Liabilities	(177)
Notional amount of underlying interest rate swaps associated with risk participation agreements	$ 67,800
Minimum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years	3 years
Maximum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years	11 years

Pension Pension (Narrative) (De

Pension Pension (Narrative) (Details)	6 Months Ended
	Jun. 30, 2015USD ($)
Pension (Narrative) [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$ 0
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0

Pension (Net Pension Cost) (Det

Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pension [Abstract]
Service cost - benefits earned during the period	$ 126	$ 133	$ 252	$ 266
Interest cost on projected benefit obligation	1,216	1,262	2,432	2,523
Expected Return on Plan Assets	(1,523)	(1,561)	(3,046)	(3,122)
Amortization of unrecognized net loss	654	360	1,309	720
Net periodic pension cost	$ 473	$ 194	$ 947	$ 387

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to Commerce Bancshares, Inc.	$ 74,353	$ 66,531	$ 135,408	$ 130,844
Preferred Stock Dividends	2,250	0	4,500	0
Net Income (Loss) Available to Common Stockholders	$ 72,103	$ 66,531	$ 130,908	$ 130,844
Basic income per common share	$ 0.75	$ 0.67	$ 1.36	$ 1.31
Diluted income per common share	$ 0.75	$ 0.66	$ 1.36	$ 1.30
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.	$ 74,353	$ 66,531	$ 135,408	$ 130,844
Preferred Stock Dividends	2,250	0	4,500	0
Net Income (Loss) Available to Common Stockholders	72,103	66,531	130,908	130,844
Less income allocated to nonvested restricted stockholders	997	856	1,793	1,658
Net income available to common stockholders	$ 71,106	$ 65,675	$ 129,115	$ 129,186
Weighted average common shares outstanding	94,380	98,206	94,832	98,855
Basic income per common share	$ 0.75	$ 0.67	$ 1.36	$ 1.31
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	$ 72,103	$ 66,531	$ 130,908	$ 130,844
Less income allocated to nonvested restricted stockholders	995	854	1,789	1,653
Net income available to common stockholders	$ 71,108	$ 65,677	$ 129,119	$ 129,191
Weighted average common shares outstanding	94,380	98,206	94,832	98,855
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	322	403	311	423
Weighted average diluted common shares outstanding	94,702	98,609	95,143	99,278
Diluted income per common share	$ 0.75	$ 0.66	$ 1.36	$ 1.30

Common Stock Common Stock (Anti

Common Stock Common Stock (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	359	138

Common Stock Common Stock (Pref

Common Stock Common Stock (Preferred Stock Issuance) (Details) - USD ($) $ / shares in Units, $ in Thousands	Jun. 19, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Common Stock (Preferred Stock) [Abstract]
Depositary shares issued	6,000,000
Preferred stock, shares issued	6,000	6,000		6,000
Preferred stock, par value	$ 1	$ 1		$ 1
Preferred Stock, Liquidation Preference, Value	$ 150,000
Preferred Stock, Liquidation Preference Per Share	$ 25
Proceeds from issuance of preferred stock	$ 144,800	$ 0	$ 144,816

Common Stock Common Stock (Acce

Common Stock Common Stock (Accelerated Share Repurchase) (Details) - USD ($) $ in Millions	Jun. 24, 2015	May. 21, 2015	Jun. 20, 2014
Common Stock (Accelerated Share Repurchase) [Abstract]
Accelerated Share Repurchase Program Repurchase Amount		$ 100	$ 200
Shares received under accelerated share repurchase program	1,480,378	1,803,427	3,208,206
Shares to be Delivered, Percentage Initially Delivered at Onset of ASR		80.00%

Accumulated Other Comprehensi70

Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014		Dec. 31, 2014	Dec. 31, 2013
Accumulated other comprehensive income		$ 48,789		$ 84,314		$ 48,789		$ 84,314		$ 62,093	$ 9,731
Other Comprehensive Income Before Reclassifications						(20,437)		114,971
Reclassified from Accumulated Oher Comprehensive Income						(1,021)		5,324
Other Comprehensive Income (Loss), before Tax						(21,458)		120,295
Other Comprehensive Income (Loss), Tax						8,154		(45,712)
Other comprehensive income (loss), net of tax		(42,928)		43,815		(13,304)		74,583
Transfer of Unrealized Gain on Securities For Which Impairment Was Not Previously Recognized						0		0
Unrealized Gain Loss on Securities OTTI [Member]
Accumulated other comprehensive income		3,855	[1]	4,311	[1]	3,855	[1]	4,311	[1]	3,791	4,203
Other Comprehensive Income Before Reclassifications						(449)		(803)
Reclassified from Accumulated Oher Comprehensive Income						483		977
Other Comprehensive Income (Loss), before Tax	[1]					34		174
Other Comprehensive Income (Loss), Tax						(13)		(66)
Other comprehensive income (loss), net of tax	[1]					21		108
Transfer of Unrealized Gain on Securities For Which Impairment Was Not Previously Recognized						43		0
Unrealized Gain Loss on Securities Other [Member]
Accumulated other comprehensive income		67,130	[1]	95,332	[1]	67,130	[1]	95,332	[1]	81,310	21,303
Other Comprehensive Income Before Reclassifications						(19,988)		115,774
Reclassified from Accumulated Oher Comprehensive Income						(2,813)		3,627
Other Comprehensive Income (Loss), before Tax	[1]					(22,801)		119,401
Other Comprehensive Income (Loss), Tax						8,664		(45,372)
Other comprehensive income (loss), net of tax	[1]					(14,137)		74,029
Transfer of Unrealized Gain on Securities For Which Impairment Was Not Previously Recognized						(43)		0
Pension Loss [Member]
Accumulated other comprehensive income		$ (22,196)	[2]	$ (15,329)	[2]	(22,196)	[2]	(15,329)	[2]	$ (23,008)	$ (15,775)
Other Comprehensive Income Before Reclassifications						0		0
Reclassified from Accumulated Oher Comprehensive Income						1,309		720
Other Comprehensive Income (Loss), before Tax	[2]					1,309		720
Other Comprehensive Income (Loss), Tax						(497)		(274)
Other comprehensive income (loss), net of tax	[2]					812		446
Transfer of Unrealized Gain on Securities For Which Impairment Was Not Previously Recognized						$ 0		$ 0
[1]	The pre-tax amounts reclassified from accumulated other comprehensive income are included in "investment securities gains (losses), net" in the consolidated statements of income.
[2]	The pre-tax amounts reclassified from accumulated other comprehensive income are included in the computation of net periodic pension cost as "amortization of unrecognized net loss" (see Note 6), for inclusion in the consolidated statements of income.

Segments Segments (Narrative) (

Segments Segments (Narrative) (Details) $ in Millions	Jan. 01, 2015USD ($)
Segments (Narrative) [Abstract]
Mortgage Loans on Real Estate transferred from Consumer segment to Other/Elimination	$ 340

Segments (Schedule Of Financial

Segments (Schedule Of Financial Information By Segment) (Details)	3 Months Ended		6 Months Ended				12 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)		Jun. 30, 2014USD ($)		Dec. 31, 2014
Segment Reporting Information [Line Items]
Segment Reporting Information, Intersegment Revenue	$ 0	$ 0	$ 0		$ 0
Number of operating segments			3				3
Net interest income	163,657,000	160,493,000	$ 309,795,000		313,559,000
Provision for loan losses	(6,757,000)	(7,555,000)	(11,177,000)		(17,215,000)
Non-interest income	114,092,000	108,763,000	220,518,000		211,390,000
Investment securities gains (losses), net	2,143,000	(2,558,000)	8,178,000	[1]	7,479,000	[1]
Non-interest expense	(165,320,000)	(162,553,000)	(329,017,000)		(324,515,000)
Income before income taxes	107,815,000	96,590,000	198,297,000		190,698,000
Consumer Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	66,517,000	66,440,000	132,182,000		131,968,000
Provision for loan losses	(8,572,000)	(8,312,000)	(16,895,000)		(17,510,000)
Non-interest income	30,206,000	28,825,000	56,600,000		54,632,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(67,587,000)	(66,366,000)	(134,250,000)		(131,320,000)
Income before income taxes	20,564,000	20,587,000	37,637,000		37,770,000
Commercial Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	73,631,000	71,301,000	144,378,000		142,387,000
Provision for loan losses	(201,000)	323,000	676,000		(60,000)
Non-interest income	49,618,000	47,533,000	97,199,000		94,637,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(65,714,000)	(63,048,000)	(130,317,000)		(124,681,000)
Income before income taxes	57,334,000	56,109,000	111,936,000		112,283,000
Wealth Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	10,739,000	9,991,000	21,530,000		19,902,000
Provision for loan losses	1,000	533,000	8,000		492,000
Non-interest income	34,737,000	31,507,000	68,294,000		61,502,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(27,004,000)	(23,991,000)	(54,287,000)		(48,773,000)
Income before income taxes	18,473,000	18,040,000	35,545,000		33,123,000
Segment Totals [Member]
Segment Reporting Information [Line Items]
Net interest income	150,887,000	147,732,000	298,090,000		294,257,000
Provision for loan losses	(8,772,000)	(7,456,000)	(16,211,000)		(17,078,000)
Non-interest income	114,561,000	107,865,000	222,093,000		210,771,000
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(160,305,000)	(153,405,000)	(318,854,000)		(304,774,000)
Income before income taxes	96,371,000	94,736,000	185,118,000		183,176,000
Other Elimination [Member]
Segment Reporting Information [Line Items]
Net interest income	12,770,000	12,761,000	11,705,000		19,302,000
Provision for loan losses	2,015,000	(99,000)	5,034,000		(137,000)
Non-interest income	(469,000)	898,000	(1,575,000)		619,000
Investment securities gains (losses), net	2,143,000	(2,558,000)	8,178,000		7,479,000
Non-interest expense	(5,015,000)	(9,148,000)	(10,163,000)		(19,741,000)
Income before income taxes	$ 11,444,000	$ 1,854,000	$ 13,179,000		$ 7,522,000
[1]	Available for sale and non-marketable securities

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional Amount of Derivatives	$ 1,046,204	$ 797,030
Education [Member]
Derivative [Line Items]
Derivative loss from industry concentration	1,100
Real Estate [Member]
Derivative [Line Items]
Derivative loss from industry concentration	3,800
Distribution [Member]
Derivative [Line Items]
Derivative loss from industry concentration	1,600
Swaps with Central Clearing Agency [Member]
Derivative [Line Items]
Swap Net Liability Position Fair Value	7,000
Cash [Member] | Swaps with Central Clearing Agency [Member]
Derivative [Line Items]
Value Of Collateral Posted	9,900
Investment Securities [Member] | Swaps with Central Clearing Agency [Member]
Derivative [Line Items]
Value Of Collateral Posted	$ 3,400

Derivative Instruments (Schedul

Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional Amount of Derivatives	$ 1,046,204	$ 797,030
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	874,809	647,709
Interest Rate Caps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	49,914	53,587
Credit Risk Participation Agreements [Member]
Derivative [Line Items]
Notional Amount of Derivatives	75,484	75,943
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	13,047	19,791
Mortgage Loan Commitments [Member]
Derivative [Line Items]
Notional Amount of Derivatives	13,683	0
Mortgage Loan Forward Sale Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	6,267	0
Forward TBA Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	$ 13,000	$ 0

Derivative Instruments (Sched75

Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Other assets	$ 10,621	$ 10,457
Other liabilities	(10,348)	(10,948)
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	10,067	10,144
Other liabilities	(10,067)	(10,166)
Not Designated as Hedging Instrument [Member] | Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	30	62
Other liabilities	(30)	(62)
Not Designated as Hedging Instrument [Member] | Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	2	3
Other liabilities	(177)	(226)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	109	248
Other liabilities	(33)	(494)
Not Designated as Hedging Instrument [Member] | Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	353	0
Other liabilities	(8)	0
Not Designated as Hedging Instrument [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	14	0
Other liabilities	(13)	0
Not Designated as Hedging Instrument [Member] | Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	46	0
Other liabilities	$ (20)	$ 0

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ 2,794	$ 587	$ 3,911	$ 967
Other Non-Interest Income [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	1,627	366	2,810	811
Other Non-Interest Income [Member] | Credit Risk Participation Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	75	93	48	198
Other Non-Interest Income [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	761	128	322	(42)
Loans Fees And Sales [Member] | Mortgage Loan Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(63)	0	345	0
Loans Fees And Sales [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	4	0	1	0
Loans Fees And Sales [Member] | Forward TBA Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ 390	$ 0	$ 385	$ 0

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative Asset, Amount Offset by Liabiilty	$ 0	$ 0
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	10,621	10,457
Derivative Assets	10,621	10,457
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	10,348	10,948
Derivative Liabilities	10,348	10,948
Derivative Subject to Master Netting Agreement [Member]
Derivative Asset, Fair Value, Gross Asset	10,145	10,209
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Asset, Net Amount Presented in the Balance Sheet	10,145	10,209
Derivative Asset, Not Offset, Policy Election Deduction	(45)	(251)
derivatve asset, fair value of collateral	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	10,100	9,958
Derivative Liability, Fair Value, Gross Liability	10,294	10,454
Derivative Liability, Amount Offset by Asset	0	0
Derivative Liability, Net Amount Presented in the Balance Sheet	10,294	10,454
Derivative Liability, Not Offset, Policy Election Deduction	(45)	(251)
Derivative Liability, Fair Value of Collateral	(7,580)	(8,738)
Derivative Liability, Fair Value, Amount Offset Against Collateral	2,669	1,465
Derivative Not Subject to Master Netting Agreement [Member]
Derivative Asset, Fair Value, Gross Asset	476	248
Derivative Asset, Amount Offset by Liabiilty	0	0
Derivative Asset, Not Subject to Master Netting Arrangement	476	248
Derivative Liability, Fair Value, Gross Liability	54	494
Derivative Liability, Amount Offset by Asset	0	0
Derivative, Fair Value, Net	$ 54	$ 494

Resale and Repurchase Agreeme78

Resale and Repurchase Agreements Resale and Repurchase Agreements (Narrative) (Details) - Collateral Swap [Member] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Balance Sheet Offsetting [Line Items]
Collateral Swap Agreements	$ 450	$ 450
Collateral Already Posted, Aggregate Fair Value	462
Collateral Accepted, Aggregate Fair Value	$ 490.7

Resale and Repurchase Agreeme79

Resale and Repurchase Agreements Resale and Repurchase Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Balance Sheet Offsetting [Line Items]
Securities Purchased under Agreements to Resell	$ 1,050,000	$ 1,050,000
Resale agreement [Member]
Balance Sheet Offsetting [Line Items]
Securities Purchased under Agreements to Resell, Gross	1,500,000	1,500,000
Securities Purchased under Agreements to Resell, Liability	(450,000)	(450,000)
Securities Purchased under Agreements to Resell	1,050,000	1,050,000
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	(1,050,000)	(1,049,370)
Securities Purchased under Agreements to Resell, Amount Offset Against Collateral	0	630
Repurchase agreement [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	2,115,693	2,308,678
Securities Sold under Agreements to Repurchase, Asset	(450,000)	(450,000)
Securities Sold under Agreements to Repurchase	1,665,693	1,858,678
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	(1,665,693)	(1,858,678)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	$ 0	$ 0

Resale and Repurchase Agreeme80

Resale and Repurchase Agreements Remaining Contractual Maturities of Repurchase Agreements (Details) $ in Thousands	Jun. 30, 2015USD ($)
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	$ 124,241
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	24,799
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	10,219
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	159,259
Government-Sponsored Enterprise Obligations [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	349,799
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	41,830
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	22,122
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	413,751
Agency Mortgage-Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	340,790
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	103,537
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	324,659
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	768,986
Asset-Backed Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	653,697
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	120,000
Asset-Backed Securities [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	0
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	773,697
Repurchase Agreements [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	1,468,527
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	290,166
Repurchase Agreements [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	357,000
Repurchase Agreements [Member] | Total Repurchase Agreements [Member] [Domain]
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase, Repurchase Liability	$ 2,115,693

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 2.5	$ 2.2	$ 5.3	$ 4.5
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 Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 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) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Nonvested Share Awards [Roll Forward]
Nonvested, Shares, Beginning Balance	1,259,689
Granted, Shares	208,623
Vested, Shares	(136,747)
Forfeited, Shares	(8,368)
Nonvested, Shares, Ending Balance	1,323,197
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance	$ 34.41
Granted , Weighted Average Grant Date Fair Value	41.60
Vested , Weighted Average Grant Date Fair Value	29.95
Forfeited , Weighted Average Grant Date Fair Value	34.46
Nonvested , Weighted Average Grant Date Fair Value, Ending Balance	$ 36

Stock-Based Compensation Stock-

Stock-Based Compensation Stock-Based Compensation (Current Year Per Share Average Fair Value and Valuation Model Assumptions) (Details) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Current Year Per Share Average Fair Value and Valuation Model Assumptions [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 7.58
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	2.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	21.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years 2 months

Stock-Based Compensation (Sum84

Stock-Based Compensation (Summary Of SAR Activity) (Details) - Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Thousands	Total
Stock Appreciation Rights [Roll Forward]
Outstanding, Shares, Beginning Balance	1,780,578
Granted, Shares	240,267
Forfeited, Shares	(3,485)
Expired, Shares	(668)
Exercised, Shares	(362,378)
Outstanding, Shares, Ending Balance	1,654,314
Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 33.96
Granted, Weighted Average Exercise Price	41.40
Forfeited, Weighted Average Exercise Price	39.37
Expired, Weighted Average Exercise Price	37.33
Exercised, Weighted Average Exercise Price	32.88
Outstanding, Weighted Average Exercise Price, Ending Balance	$ 35.27
Outstanding, Weighted Average Remaining Contractual Term (in years)	4 years 6 months
Outstanding, Aggregate Intrinsic Value, Ending Balance	$ 19,029

Stock-Based Compensation (Sum85

Stock-Based Compensation (Summary Of Option Activity) (Details) - Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Thousands	Total
Stock Options [Roll Forward]
Outstanding, Shares, Beginning Balance	68,675
Granted, shares	0
Foreited, shares	0
Expired, Shares	0
Exercised, Shares	(67,865)
Outstanding, Shares, Ending Balance	810
Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 29.27
Granted, Weighted Average Exercise Price	0
Forfeited, Weighted Average Exercise Price	0
Expired, Weighted Average Exercise Price	0
Exercised, Weighted Average Exercise Price	29.25
Outstanding, Weighted Average Exercise Price, Ending Balance	$ 31.26
Outstanding, Weighted Average Remaining Contractual Term (in years)	2 months
Outstanding, Aggregate Intrinsic Value, Ending Balance	$ 13

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - Fair Value Hierarchy, Level 3 [Member] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Auction Rate Securities Available For Sale	$ 92,900
Private equity investments	$ 58,726	$ 57,581

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 18,971	$ 15,357
Derivative Assets	10,621	10,457
Derivative Liabilities	10,348	10,948
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	7,852	0
U.S. government and federal agency obligations	434,866	501,407
Government-sponsored enterprise obligations	886,501	963,127
State and municipal obligations	1,817,101	1,813,201
Agency mortgage-backed securities	2,587,693	2,593,708
Non-agency mortgage-backed securities	690,938	382,744
Other asset-backed securities	2,498,506	3,091,993
Other debt securities	265,107	139,161
Equity securities	41,109	38,219
Trading securities	18,971	15,357
Private equity investments	58,726	57,581
Derivative Assets	10,621	10,457
Assets held in trust	9,375	8,848
Total Assets	9,327,366	9,615,803
Derivative Liabilities	10,348	10,948
Total Liabilities	10,348	10,948
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	434,866	501,407
Government-sponsored enterprise obligations	0	0
State and municipal obligations	0	0
Agency mortgage-backed securities	0	0
Non-agency mortgage-backed securities	0	0
Other asset-backed securities	0	0
Other debt securities	0	0
Equity securities	20,272	17,975
Trading securities	0	0
Private equity investments	0	0
Derivative Assets	0	0
Assets held in trust	9,375	8,848
Total Assets	464,513	528,230
Derivative Liabilities	0	0
Total Liabilities	0	0
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	7,852	0
U.S. government and federal agency obligations	0	0
Government-sponsored enterprise obligations	886,501	963,127
State and municipal obligations	1,724,161	1,718,058
Agency mortgage-backed securities	2,587,693	2,593,708
Non-agency mortgage-backed securities	690,938	382,744
Other asset-backed securities	2,498,506	3,091,993
Other debt securities	265,107	139,161
Equity securities	20,837	20,244
Trading securities	18,971	15,357
Private equity investments	0	0
Derivative Assets	10,266	10,454
Assets held in trust	0	0
Total Assets	8,710,832	8,934,846
Derivative Liabilities	10,163	10,722
Total Liabilities	10,163	10,722
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	92,940	95,143
Agency mortgage-backed securities	0	0
Non-agency mortgage-backed securities	0	0
Other asset-backed securities	0	0
Other debt securities	0	0
Equity securities	0	0
Trading securities	0	0
Private equity investments	58,726	57,581
Derivative Assets	355	3
Assets held in trust	0	0
Total Assets	152,021	152,727
Derivative Liabilities	185	226
Total Liabilities	$ 185	$ 226

Fair Value Measurements (Summ88

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 154,591	$ 203,358	$ 152,501	$ 184,271
Total gains or losses (realized /unrealized), included in earnings	887	(4,765)	4,568	12,134
Total gains or losses (realized /unrealized), included in other comprehensive income	(352)	5,088	(354)	4,304
Investment securities called	0	0	(2,000)	0
Discount accretion	21	41	151	80
Purchase of private equity securities	1,437	4,000	1,653	7,000
Sales And Repayments Of Private Equity Securities	(4,800)	(31,409)	(4,800)	(31,423)
Capitalized interest/dividends	52	13	117	67
Sale Of Risk Participation Agreement	0	(214)	0	(321)
Ending balance	151,836	176,112	151,836	176,112
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	1,295	(4,769)	4,568	(6,263)
State And Municipal Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	93,271	126,979	95,143	127,724
Total gains or losses (realized /unrealized), included in earnings	0	0	0	0
Total gains or losses (realized /unrealized), included in other comprehensive income	(352)	5,088	(354)	4,304
Investment securities called	0	0	(2,000)	0
Discount accretion	21	41	151	80
Purchase of private equity securities	0	0	0	0
Sales And Repayments Of Private Equity Securities	0	0	0	0
Capitalized interest/dividends	0	0	0	0
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	92,940	132,108	92,940	132,108
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	61,162	76,446	57,581	56,612
Total gains or losses (realized /unrealized), included in earnings	875	(4,858)	4,175	11,936
Total gains or losses (realized /unrealized), included in other comprehensive income	0	0	0	0
Investment securities called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	1,437	4,000	1,653	7,000
Sales And Repayments Of Private Equity Securities	(4,800)	(31,409)	(4,800)	(31,423)
Capitalized interest/dividends	52	13	117	67
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	58,726	44,192	58,726	44,192
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	875	(4,858)	4,175	(6,457)
Derivative Level Three Unobservable Inputs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	158	(67)	(223)	(65)
Total gains or losses (realized /unrealized), included in earnings	12	93	393	198
Total gains or losses (realized /unrealized), included in other comprehensive income	0	0	0	0
Investment securities called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	0	0	0	0
Sales And Repayments Of Private Equity Securities	0	0	0	0
Capitalized interest/dividends	0	0	0	0
Sale Of Risk Participation Agreement	0	(214)	0	(321)
Ending balance	170	(188)	170	(188)
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	$ 420	$ 89	$ 393	$ 194

Fair Value Measurements (Summ89

Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ 887	$ (4,765)	$ 4,568	$ 12,134
Change in unrealized gains or losses relating to assets still held	1,295	(4,769)	4,568	(6,263)
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	(63)	0	345	0
Change in unrealized gains or losses relating to assets still held	345	0	345	0
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	75	93	48	198
Change in unrealized gains or losses relating to assets still held	75	89	48	194
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	875	(4,858)	4,175	11,936
Change in unrealized gains or losses relating to assets still held	$ 875	$ (4,858)	$ 4,175	$ (6,457)

Fair Value Measurements (Summ90

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) - 6 months ended Jun. 30, 2015	Total
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Auction Rate Securities [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable Input, Estimated market recovery period	3 years
Unobservable Input, Estimated market rate	2.00%
Auction Rate Securities [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable Input, Estimated market recovery period	5 years
Unobservable Input, Estimated market rate	5.00%
Private Equity Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique, Market comparable companies	Market comparable companies
Private Equity Investments [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	4
Private Equity Investments [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	5.5
Mortgage Loan Commitments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Technique, Discounted cash flow	Discounted cash flow
Weighted Average, Probability of Funding	85.20%
Weighted Average, Embedded Servicing Value	1.00%
Mortgage Loan Commitments [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Probability of Funding	64.70%
Embedded Servicing Value	0.70%
Mortgage Loan Commitments [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Probability of Funding	100.00%
Embedded Servicing Value	1.00%

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Fair Value [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 3,897	$ 10,603
Private Equity Investments Nonrecurring Basis	0	1,309
Mortgage servicing rights	1,242	793
Foreclosed assets	608	1,191
Long-lived assets	2,425	7,246
Fair Value, Inputs, Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	0	0
Private Equity Investments Nonrecurring Basis	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	0	0
Private Equity Investments Nonrecurring Basis	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	3,897	10,603
Private Equity Investments Nonrecurring Basis	0	1,309
Mortgage servicing rights	1,242	793
Foreclosed assets	608	1,191
Long-lived assets	2,425	7,246
Total Gains (Losses) Recognized During The Period [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans Nonrecurring Basis Gains Losses	(1,340)	(3,124)
Private Equity Investments Nonrecurring Basis Gains Losses	0	(1,191)
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	53	1
Foreclosed Assets Nonrecurring Basis Gains Losses	(162)	(319)
Long Lived Assets Nonrecurring Basis Gains Losses	$ (1,667)	$ (1,408)

Fair Value Of Financial Instr92

Fair Value Of Financial Instruments (Schedule Of Estimated Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Personal Real Estate Loans Held for Sale	$ 7,900
Available for sale securities	9,221,821	$ 9,523,560
Trading securities	18,971	15,357
Non-marketable	108,346	106,875
Securities purchased under agreements to resell	1,050,000	1,050,000
Cash and due from banks	409,791	467,488
Derivative Assets	10,621	10,457
Non-interest bearing deposits	6,886,509	6,811,959
Savings, interest checking and money market deposits	10,369,031	10,541,601
Derivative Liabilities	10,348	10,948
Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Derivative Assets	0	0
Derivative Liabilities	0	0
Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	18,971	15,357
Derivative Assets	10,266	10,454
Derivative Liabilities	10,163	10,722
Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Derivative Assets	355	3
Derivative Liabilities	185	226
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	455,138	519,382
Federal funds sold	26,875	32,485
Interest earning deposits with banks	264,683	600,744
Cash and due from banks	409,791	467,488
Non-interest bearing deposits	6,886,509	6,811,959
Savings, interest checking and money market deposits	10,369,031	10,541,601
Federal Funds Purchased	350	3,840
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Personal Real Estate Loans Held for Sale	7,852	0
Available for sale securities	8,673,743	8,909,035
Trading securities	18,971	15,357
Derivative Assets	10,266	10,454
Derivative Liabilities	10,163	10,722
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	92,940	95,143
Non-marketable	108,346	106,875
Securities purchased under agreements to resell	1,050,000	1,050,000
Derivative Assets	355	3
Time open and certificates of deposits	2,033,169	2,122,218
Securities Sold under Agreements to Repurchase	1,665,693	1,858,678
Other borrowings	103,843	104,058
Derivative Liabilities	185	226
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,267,997	3,969,952
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Construction And Land [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	448,887	403,507
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,276,231	2,288,215
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,901,671	1,883,092
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Consumer [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,848,457	1,705,134
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Revolving Home Equity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	430,880	430,873
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Consumer Credit Card [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	750,731	782,370
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Overdrafts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,627	6,095
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	455,138	519,382
Federal funds sold	26,875	32,485
Interest earning deposits with banks	264,683	600,744
Cash and due from banks	409,791	467,488
Non-interest bearing deposits	6,886,509	6,811,959
Savings, interest checking and money market deposits	10,369,031	10,541,601
Federal Funds Purchased	350	3,840
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Personal Real Estate Loans Held for Sale	7,852	0
Available for sale securities	8,673,743	8,909,035
Trading securities	18,971	15,357
Derivative Assets	10,266	10,454
Derivative Liabilities	10,163	10,722
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	92,940	95,143
Non-marketable	108,346	106,875
Securities purchased under agreements to resell	1,050,400	1,048,866
Derivative Assets	355	3
Time open and certificates of deposits	2,031,121	2,121,114
Securities Sold under Agreements to Repurchase	1,665,751	1,858,731
Other borrowings	110,087	111,102
Derivative Liabilities	185	226
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Business [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,282,667	3,982,531
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	454,531	407,905
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	2,308,581	2,315,378
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value Hierarchy, Level 3 [Member] | Real Estate - Personal [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,932,967	1,933,456
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	1,843,240	1,701,037
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	433,447	433,508
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	763,226	794,929
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	$ 3,627	$ 6,095

Uncategorized Items - cbsh-2015

Label	Element	Value
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	$ 65,900
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	$ 75,323