Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator: [Abstract]:
Net income attributable to BOK Financial Corp. shareholders	$ 523,569	$ 530,746	$ 520,273
Less: Earnings allocated to participating securities	4,991	4,253	3,803
Numerator for basic earnings per share - income available to common shareholders	518,578	526,493	516,470
Effect of reallocating undistributed earnings of participating securities	0	0	0
Numerator for diluted earnings per share - income available to common shareholders	$ 518,578	$ 526,493	$ 516,470
Denominator: [Abstract]
Weighted average shares outstanding	64,348,373	66,184,832	67,706,014
Less: Participating securities included in weighted average shares outstanding (in shares)	603,285	533,263	493,286
Denominator for basic earnings per common share (in shares)	63,745,088	65,651,569	67,212,728
Dilutive effect of employee stock compensation plans (in shares)	0	0	7
Denominator for diluted earnings per common share (in shares)	63,745,088	65,651,569	67,212,735
Basic (in dollars per share)	$ 8.14	$ 8.02	$ 7.68
Diluted earnings per share (per share)	$ 8.14	$ 8.02	$ 7.68