Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Earnings Per Share [Table Text Block]

(In thousands, except share and per share amounts)	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Numerator:
Net income attributable to BOK Financial Corp. shareholders	$	85,649	$	74,277	$	262,152	$	182,642
Less: Earnings allocated to participating securities	888		916		2,817		2,275
Numerator for basic earnings per share – income available to common shareholders	84,761		73,361		259,335		180,367
Effect of reallocating undistributed earnings of participating securities	1		1		2		1
Numerator for diluted earnings per share – income available to common shareholders	$	84,762	$	73,362	$	259,337	$	180,368
Denominator:
Weighted average shares outstanding	65,423,258		65,895,430		65,432,313		66,031,497
Less:  Participating securities included in weighted average shares outstanding	680,436		810,038		702,922		822,723
Denominator for basic earnings per common share	64,742,822		65,085,392		64,729,391		65,208,774
Dilutive effect of employee stock compensation plans1	62,350		72,449		64,502		54,792
Denominator for diluted earnings per common share	64,805,172		65,157,841		64,793,893		65,263,566
Basic earnings per share	$	1.31	$	1.13	$	4.01	$	2.77
Diluted earnings per share	$	1.31	$	1.13	$	4.00	$	2.76
1  Excludes employee stock options with exercise prices greater than current market price.	—		—		—		—