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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share [Table Text Block]
(In thousands, except share and per share amounts)
 
Three Months Ended
 
 
March 31,
 
 
2013
 
2012
Numerator:
 
 
 
 
Net income attributable to BOK Financial Corp.
 
$
87,964

 
$
83,615

Earnings allocated to participating securities
 
(971
)
 
(740
)
Numerator for basic earnings per share – income available to common shareholders
 
86,993

 
82,875

Effect of reallocating undistributed earnings of participating securities
 
5

 
2

Numerator for diluted earnings per share – income available to common shareholders
 
$
86,998

 
$
82,877

 
 
 
 
 
Denominator:
 
 

 
 

Weighted average shares outstanding
 
68,569,475

 
68,268,458

Less:  Participating securities included in weighted average shares outstanding
 
(754,925
)
 
(603,158
)
Denominator for basic earnings per common share
 
67,814,550

 
67,665,300

Dilutive effect of employee stock compensation plans1
 
225,630

 
276,595

Denominator for diluted earnings per common share
 
68,040,180

 
67,941,895

 
 
 
 
 
Basic earnings per share
 
$
1.28

 
$
1.22

Diluted earnings per share
 
$
1.28

 
$
1.22

1  Excludes employee stock options with exercise prices greater than current market price.
 
87,377

 
356,708