Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
INTEREST INCOME
Interest and fees on loans	$ 110,702	$ 107,786
Interest and fees on loans held for sale	0	85
Interest on investment securities	45,019	44,959
Interest on short-term federal funds sold and securities purchased under agreements to resell	26	9
Interest on long-term securities purchased under agreements to resell	4,151	5,829
Interest on deposits with banks	100	77
Total interest income	159,998	158,745
INTEREST EXPENSE
Savings, interest checking and money market	3,306	3,924
Time open and C.D.'s of less than $100,000	1,120	1,749
Time open and C.D.'s of $100,000 and over	1,452	1,699
Interest on federal funds purchased and securities sold under agreements to repurchase	203	218
Interest on other borrowings	851	812
Total interest expense	6,932	8,402
Net interest income	153,066	150,343
Provision for loan losses	9,660	3,285
Net interest income after provision for loan losses	143,406	147,058
NON-INTEREST INCOME
Bank card transaction fees	41,717	38,550
Trust fees	26,573	25,169
Deposit account charges and other fees	18,590	18,712
Capital market fees	3,870	4,391
Consumer brokerage services	2,747	2,686
Loan fees and sales	1,209	1,473
Other	7,921	8,896
Total non-interest income	102,627	99,877
INVESTMENT SECURITIES GAINS (LOSSES), NET
Impairment (losses) reversals on debt securities	(63)	1,389
Noncredit-related losses (reversals) on securities not expected to be sold	(283)	(1,831)
Net impairment gains (losses)	(346)	(442)
Realized gains (losses) on sales and fair value adjustments	10,383	(1,723)
Investment securities gains, net	10,037	(2,165)
NON-INTEREST EXPENSE
Salaries and employee benefits	94,263	90,881
Net occupancy	11,616	11,235
Equipment	4,504	4,683
Supplies and communication	5,699	5,589
Data processing and software	19,087	18,951
Marketing	3,681	3,359
Deposit insurance	2,894	2,767
Other	20,596	17,572
Total non-interest expense	162,340	155,037
Income before income taxes	93,730	89,733
Less income taxes	29,609	28,925
Net income	64,121	60,808
Less non-controlling interest expense	(192)	(209)
Net income attributable to Commerce Bancshares, Inc.	$ 64,313	$ 61,017
Net income per common share - basic	$ 0.67	$ 0.64
Net income per common share - diluted	$ 0.67	$ 0.63