Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator: [Abstract]
Net income attributable to BOK Financial Corp. shareholders	$ 83,703	$ 162,368
Less: Earnings allocated to participating securities	676	1,255
Numerator for basic earnings per share – income available to common shareholders	83,027	161,113
Effect of reallocating undistributed earnings of participating securities	0	0
Numerator for diluted earnings per share – income available to common shareholders	$ 83,027	$ 161,113
Denominator: [Abstract]
Weighted average shares outstanding (in shares)	64,812,555	66,849,288
Less: Participating securities included in weighted average shares (in shares)	522,450	517,513
Denominator for basic earnings per common share (in shares)	64,290,105	66,331,775
Dilutive effect of employee stock compensation plans (in shares)	0	0
Denominator for diluted earnings per common share (in shares)	64,290,105	66,331,775
Basic earnings per share	$ 1.29	$ 2.43
Diluted earnings per share	$ 1.29	$ 2.43