Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 115,452	$ 120,553
Other comprehensive income (loss)
Net unrealized gains (losses) on available for sale debt securities	(20,401)	142,466
Change in pension loss	176	270
Unrealized gains (losses) on cash flow hedge derivatives	(19,390)	3,630
Current period other comprehensive income (loss), net of tax	(39,615)	146,366
Comprehensive income (loss)	75,837	266,919
Less non-controlling interest (income) expense	2,789	1,101
Comprehensive income (loss) attributable to Commerce Bancshares, Inc.	$ 73,048	$ 265,818