Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Share [Table Text Block]

(In thousands, except share and per share amounts)	Three Months Ended March 31,
	2018		2017
Numerator:
Net income attributable to BOK Financial Corp. shareholders	$	105,562	$	88,356
Less: Earnings allocated to participating securities	1,022		1,003
Numerator for basic earnings per share – income available to common shareholders	104,540		87,353
Effect of reallocating undistributed earnings of participating securities	—		—
Numerator for diluted earnings per share – income available to common shareholders	$	104,540	$	87,353
Denominator:
Weighted average shares outstanding	65,479,482		65,457,772
Less:  Participating securities included in weighted average shares outstanding	632,148		741,808
Denominator for basic earnings per common share	64,847,334		64,715,964
Dilutive effect of employee stock compensation plans1	40,699		67,773
Denominator for diluted earnings per common share	64,888,033		64,783,737
Basic earnings per share	$	1.61	$	1.35
Diluted earnings per share	$	1.61	$	1.35
1  Excludes employee stock options with exercise prices greater than current market price.	—		—