Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator: [Abstract]
Net income attributable to BOK Financial Corp. shareholders	$ 163,713	$ 151,308	$ 247,416	$ 313,676
Less: Earnings allocated to participating securities	1,602	1,202	2,278	2,457
Numerator for basic earnings per share – income available to common shareholders	162,111	150,106	245,138	311,219
Effect of reallocating undistributed earnings of participating securities	0	0	0	0
Numerator for diluted earnings per share – income available to common shareholders	$ 162,111	$ 150,106	$ 245,138	$ 311,219
Denominator: [Abstract]
Weighted average shares outstanding (in shares)	64,343,898	66,521,728	64,578,226	66,684,603
Less: Participating securities included in weighted average shares (in shares)	629,694	527,596	576,072	522,555
Denominator for basic earnings per common share (in shares)	63,714,204	65,994,132	64,002,154	66,162,048
Dilutive effect of employee stock compensation plans (in shares)	0	0	0	0
Denominator for diluted earnings per common share (in shares)	63,714,204	65,994,132	64,002,154	66,162,048
Basic earnings per share	$ 2.54	$ 2.27	$ 3.83	$ 4.70
Diluted earnings per share	$ 2.54	$ 2.27	$ 3.83	$ 4.70