Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Loans	$ 9,177,478	$ 9,410,982
Allowance for loan losses	(184,532)	(197,538)
Net loans	8,992,946	9,213,444
Loans held for sale	31,076	63,751
Investment securities:
Available for sale ($418,046,000 and $429,439,000 pledged in 2011 and 2010, respectively, to secure structured repurchase agreements)	9,224,702	7,294,303
Trading	17,853	11,710
Non-marketable	115,832	103,521
Total investment securities	9,358,387	7,409,534
Short-term federal funds sold and securities purchased under agreements to resell	11,870	10,135
Long-term securities purchased under agreements to resell	850,000	450,000
Interest earning deposits with banks	39,853	122,076
Cash and due from banks	465,828	328,464
Land, buildings and equipment - net	360,146	383,397
Goodwill	125,585	125,585
Other intangible assets - net	7,714	10,937
Other assets	405,962	385,016
Total assets	20,649,367	18,502,339
LIABILITIES AND STOCKHOLDERS' EQUITY
Non-interest bearing	5,377,549	4,494,028
Savings, interest checking and money market	8,933,941	7,846,831
Time open and C.D.'s of less than $100,000	1,166,104	1,465,050
Time open and C.D.'s of $100,000 and over	1,322,289	1,279,112
Total deposits	16,799,883	15,085,021
Federal funds purchased and securities sold under agreements to repurchase	1,256,081	982,827
Other borrowings	111,817	112,273
Other liabilities	311,225	298,754
Total liabilities	18,479,006	16,478,875
Commerce Bancshares, Inc. stockholders' equity:
Preferred stock, $1 par value Authorized and unissued 2,000,000 shares
Common stock, $5 par value Authorized 100,000,000 shares; issued 89,277,398 and 86,788,322 shares in 2011 and 2010, respectively	446,387	433,942
Capital surplus	1,042,065	971,293
Retained earnings	575,419	555,778
Treasury stock of 217,755 and 61,839 shares in 2011 and 2010, respectively, at cost	(8,362)	(2,371)
Accumulated other comprehensive income	110,538	63,345
Total Commerce Bancshares, Inc. stockholders' equity	2,166,047	2,021,987
Non-controlling interest	4,314	1,477
Total equity	2,170,361	2,023,464
Total liabilities and equity	$ 20,649,367	$ 18,502,339