Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 156,591	$ 187,721	$ 351,901	$ 499,136
Other Comprehensive Income (Loss), before Tax [Abstract]
Net change in unrealized loss	(412,084)	(74,525)	(1,293,661)	(216,176)
Reclassification Adjustments Included in Earnings [Abstract]
Interest revenue, Investment securities	21,675	0	24,130	0
Operating expense, Personnel	(3,483)	0	(3,483)	0
Gain on available for sale securities, net	(892)	(1,255)	(3,017)	(3,152)
Other comprehensive loss before income taxes	(394,784)	(75,780)	(1,276,031)	(219,328)
Federal and state income taxes	(92,467)	(18,184)	(298,715)	(52,632)
Other comprehensive loss, net of income taxes	(302,317)	(57,596)	(977,316)	(166,696)
Comprehensive income (loss)	(145,726)	130,125	(625,415)	332,440
Comprehensive income (loss) attributable to non-controlling interests	81	(601)	57	(1,667)
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$ (145,807)	$ 130,726	$ (625,472)	$ 334,107