Consolidated Statements of Income (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011		Jun. 30, 2010
INTEREST INCOME
Interest and fees on loans	$ 116,769	$ 128,781	$ 235,146		$ 259,703
Interest and fees on loans held for sale	309	2,261	607		4,165
Interest on investment securities	57,712	53,801	112,601		108,964
Interest on short-term federal funds sold and securities purchased under agreements to resell	22	13	32		28
Interest on long-term securities purchased under agreements to resell	3,165		5,327
Interest on deposits with banks	110	201	200		266
Total interest income	178,087	185,057	353,913		373,126
INTEREST EXPENSE
Savings, interest checking and money market	6,372	7,711	13,272		14,807
Time open and C.D.'s of less than $100,000	2,965	6,059	6,708		12,874
Time open and C.D.'s of $100,000 and over	2,434	3,562	5,107		7,485
Interest on federal funds purchased and securities sold under agreements to repurchase	687	826	1,309		1,646
Interest on other borrowings	919	3,791	1,834		10,496
Total interest expense	13,377	21,949	28,230		47,308
Net interest income	164,710	163,108	325,683		325,818
Provision for loan losses	12,188	22,187	27,977		56,509
Net interest income after provision for loan losses	152,522	140,921	297,706		269,309
NON-INTEREST INCOME
Bank card transaction fees	41,304	37,659	78,766		70,149
Trust fees	22,544	20,358	44,116		39,676
Deposit account charges and other fees	20,789	25,472	40,089		49,453
Bond trading income	4,979	5,387	9,699		10,391
Consumer brokerage services	2,880	2,372	5,543		4,489
Loan fees and sales	2,075	3,472	3,899		5,311
Other	6,773	6,738	15,138		15,178
Total non-interest income	101,344	101,458	197,250		194,647
INVESTMENT SECURITIES GAINS (LOSSES), NET
Impairment (losses) reversals on debt securities	(2,119)	4,415	4,186		5,710
Noncredit-related losses (reversals) on securities not expected to be sold	1,469	(5,091)	(5,110)		(7,843)
Net impairment losses	(650)	(676)	(924)		(2,133)
Realized gains (losses) on sales and fair value adjustments	2,606	1,336	4,207		(872)
Investment securities gains (losses), net	1,956	660	3,283	[1]	(3,005)	[1]
NON-INTEREST EXPENSE
Salaries and employee benefits	84,223	87,108	171,615		174,546
Net occupancy	11,213	11,513	23,250		23,611
Equipment	5,702	5,938	11,279		11,839
Supplies and communication	5,692	6,829	11,224		14,167
Data processing and software	17,531	17,497	33,998		34,103
Marketing	4,495	5,002	8,753		9,720
Deposit insurance	2,780	4,939	7,671		9,689
Indemnification obligation		(1,683)	(1,359)		(1,683)
Other	21,877	18,650	41,042		35,525
Total non-interest expense	153,513	155,793	307,473		311,517
Income before income taxes	102,309	87,246	190,766		149,434
Less income taxes	32,692	27,428	60,199		45,805
Net income	69,617	59,818	130,567		103,629
Less non-controlling interest expense (income)	583	84	1,080		(275)
Net income attributable to Commerce Bancshares, Inc.	$ 69,034	$ 59,734	$ 129,487		$ 103,904
Net income per common share - basic	$ 0.80	$ 0.69	$ 1.49		$ 1.19
Net income per common share - diluted	$ 0.79	$ 0.68	$ 1.48		$ 1.18

[1] Available for sale and non-marketable securities