Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 132,858	$ 167,107	$ 195,310	$ 311,415
Other Comprehensive Income (Loss), before Tax [Abstract]
Net change in unrealized gain (loss)	(242,536)	8,480	(881,577)	(141,651)
Reclassification Adjustments Included in Earnings [Abstract]
Gain on available for sale securities, net	(1,188)	(1,430)	(2,125)	(1,897)
Interest revenues, Investment securities	(2,455)	0	(2,455)	0
Other comprehensive income (loss) before income taxes	(241,269)	7,050	(881,247)	(143,548)
Federal and state income taxes	(56,467)	1,691	(206,248)	(34,448)
Other comprehensive income (loss), net of income taxes	(184,802)	5,359	(674,999)	(109,100)
Comprehensive income (loss)	(51,944)	172,466	(479,689)	202,315
Comprehensive income (loss) attributable to non-controlling interests	12	686	(24)	(1,066)
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$ (51,956)	$ 171,780	$ (479,665)	$ 203,381