Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 531,133	$ 520,293	$ 616,325
Other comprehensive income (loss), before income taxes: [Abstract]
Net change in unrealized gain (loss)	218,293	(1,227,414)	(341,369)
Reclassification adjustments included in earnings: [Abstract]
Interest revenue, Investment securities	60,394	42,514	0
Operating expense, Personnel	0	(3,483)	0
Loss (gain) on available for sale securities, net	30,636	971	(3,704)
Other comprehensive gain (loss), before income taxes	309,323	(1,187,412)	(345,073)
Federal and state income taxes	71,468	(278,086)	(81,576)
Other comprehensive gain (loss), net of income taxes	237,855	(909,326)	(263,497)
Comprehensive income (loss)	768,988	(389,033)	352,828
Comprehensive income (loss) attributable to non-controlling interests	387	20	(1,796)
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$ 768,601	$ (389,053)	$ 354,624