Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
INTEREST INCOME
Interest and fees on loans	$ 111,286	$ 110,702
Interest and fees on loans held for sale	21	0
Interest on investment securities	38,436	45,019
Interest on federal funds sold and short-term securities purchased under agreements to resell	9	26
Interest on long-term securities purchased under agreements to resell	3,051	4,151
Interest on deposits with banks	179	100
Total interest income	152,982	159,998
INTEREST EXPENSE
Savings, interest checking and money market	3,308	3,306
Time open and C.D.'s of less than $100,000	880	1,120
Time open and C.D.'s of $100,000 and over	1,410	1,452
Interest on federal funds purchased and securities sold under agreements to repurchase	367	203
Interest on other borrowings	879	851
Total interest expense	6,844	6,932
Net interest income	146,138	153,066
Provision for loan losses	4,420	9,660
Net interest income after provision for loan losses	141,718	143,406
NON-INTEREST INCOME
Bank card transaction fees	42,299	41,717
Trust fees	29,586	26,573
Deposit account charges and other fees	18,499	18,590
Consumer brokerage services	3,188	2,747
Capital market fees	3,002	3,870
Loan fees and sales	2,089	1,209
Other	7,763	7,921
Total non-interest income	106,426	102,627
INVESTMENT SECURITIES GAINS (LOSSES), NET
Change in fair value of other-than-temporary impaired securities	(227)	(63)
Portion recognized in other comprehensive income	210	(283)
Net impairment gains (losses) recognized in earnings	(17)	(346)
Realized gains (losses) on sales and fair value adjustments	6,052	10,383
Investment securities gains (losses), net	6,035	10,037
NON-INTEREST EXPENSE
Salaries and employee benefits	98,074	94,263
Net occupancy	11,561	11,616
Equipment	4,703	4,504
Supplies and communication	5,581	5,699
Data processing and software	19,506	19,087
Marketing	3,918	3,681
Deposit insurance	3,001	2,894
Other	17,353	20,218
Total non-interest expense	163,697	161,962
Income before income taxes	90,482	94,108
Less income taxes	28,468	29,987
Net income	62,014	64,121
Less non-controlling interest expense	959	(192)
Net income attributable to Commerce Bancshares, Inc.	61,055	64,313
Preferred Stock Dividends	2,250	0
Net Income (Loss) Available to Common Stockholders	$ 58,805	$ 64,313
Net income per common share - basic	$ 0.61	$ 0.64
Net income per common share - diluted	$ 0.61	$ 0.64