Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2014

Regulatory Capital Requirements [Abstract]

Schedule Of Capital Amounts And Ratios On Consolidated Basis

The following tables show the capital amounts and ratios for the Company (on a consolidated basis) and the Bank, together with the minimum and well-capitalized capital requirements, at the last two year ends.

	Actual				Minimum Capital Requirement				Well-Capitalized Capital Requirement
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2014
Total Capital (to risk-weightedassets):
Commerce Bancshares, Inc. (consolidated)	$	2,304,206	14.86	%	$	1,240,732	8.00	%	N.A.		N.A.
Commerce Bank	2,026,666		13.16		1,232,378		8.00		$	1,540,472	10.00	%
Tier I Capital (to risk-weightedassets):
Commerce Bancshares, Inc. (consolidated)	$	2,131,169	13.74	%	$	620,366	4.00	%	N.A.		N.A.
Commerce Bank	1,869,053		12.13		616,189		4.00		$	924,283	6.00	%
Tier I Capital (to adjusted quarterly average assets):
(Leverage Ratio)
Commerce Bancshares, Inc. (consolidated)	$	2,131,169	9.36	%	$	910,977	4.00	%	N.A.		N.A.
Commerce Bank	1,869,053		8.24		907,807		4.00		$	1,134,759	5.00	%
December 31, 2013
Total Capital (to risk-weightedassets):
Commerce Bancshares, Inc. (consolidated)	$	2,239,636	15.28	%	$	1,172,843	8.00	%	N.A.		N.A.
Commerce Bank	1,971,850		13.55		1,164,469		8.00		$	1,455,586	10.00	%
Tier I Capital (to risk-weightedassets):
Commerce Bancshares, Inc. (consolidated)	$	2,061,761	14.06	%	$	586,421	4.00	%	N.A.		N.A.
Commerce Bank	1,809,231		12.43		582,234		4.00		$	873,351	6.00	%
Tier I Capital (to adjusted quarterly average assets):
(Leverage Ratio)
Commerce Bancshares, Inc. (consolidated)	$	2,061,761	9.43	%	$	874,673	4.00	%	N.A.		N.A.
Commerce Bank	1,809,231		8.31		871,050		4.00		$	1,088,812	5.00	%