Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 120,553	$ 120,026
Other comprehensive income (loss)
Net unrealized gains (losses) on available for sale debt securities	142,466	(507,265)
Change in pension loss	270	323
Unrealized gains (losses) on cash flow hedge derivatives	3,630	(4,538)
Current period other comprehensive income (loss), net of tax	146,366	(511,480)
Comprehensive income (loss)	266,919	(391,454)
Less non-controlling interest (income) expense	1,101	1,872
Comprehensive income (loss) attributable to Commerce Bancshares, Inc.	$ 265,818	$ (393,326)