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Earnings Per Share
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
Earnings Per Share
 
(In thousands, except share and per share amounts)
 
Three Months Ended
March 31,
 
 
2017
 
2016
Numerator:
 
 
 
 
Net income attributable to BOK Financial Corp. shareholders
 
$
88,356

 
$
42,564

Less: Earnings allocated to participating securities
 
1,003

 
538

Numerator for basic earnings per share – income available to common shareholders
 
87,353

 
42,026

Effect of reallocating undistributed earnings of participating securities
 
—

 
—

Numerator for diluted earnings per share – income available to common shareholders
 
$
87,353

 
$
42,026

 
 
 
 
 
Denominator:
 
 

 
 

Weighted average shares outstanding
 
65,457,772

 
66,131,166

Less:  Participating securities included in weighted average shares outstanding
 
741,808

 
834,625

Denominator for basic earnings per common share
 
64,715,964

 
65,296,541

Dilutive effect of employee stock compensation plans1
 
67,773

 
34,887

Denominator for diluted earnings per common share
 
64,783,737

 
65,331,428

 
 
 
 
 
Basic earnings per share
 
$
1.35

 
$
0.64

Diluted earnings per share
 
$
1.35

 
$
0.64

1  Excludes employee stock options with exercise prices greater than current market price.
 
—

 
244,019