Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 130,633	$ 115,452
Other comprehensive income (loss)
Net unrealized gains (losses) on available for sale debt securities	118,288	(20,401)
Change in pension loss	172	176
Unrealized gains (losses) on cash flow hedge derivatives	5,875	(19,390)
Current period other comprehensive income (loss), net of tax	124,335	(39,615)
Comprehensive income (loss)	254,968	75,837
Less non-controlling interest (income) expense	(959)	2,789
Comprehensive income (loss) attributable to Commerce Bancshares, Inc.	$ 255,927	$ 73,048