Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 616,325	$ 435,071	$ 500,685
Other comprehensive income (loss), before income taxes: [Abstract]
Net change in unrealized gain (loss)	(341,369)	313,796	241,047
Reclassification adjustments included in earnings: [Abstract]
Gain on available for sale securities, net	(3,704)	(9,910)	(5,597)
Other comprehensive gain (loss), before income taxes	(345,073)	303,886	235,450
Federal and state income taxes	(81,576)	72,941	57,942
Other comprehensive gain (loss), net of income taxes	(263,497)	230,945	177,508
Comprehensive income	352,828	666,016	678,193
Comprehensive income (loss) attributable to non-controlling interests	(1,796)	41	(73)
Comprehensive income attributable to BOK Financial Corp. shareholders	$ 354,624	$ 665,975	$ 678,266