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Federal and State Income Taxes
 9 Months Ended
Sep. 30, 2014
Income Tax Disclosure [Abstract]  
Federal and State Income Taxes
(13) Federal and State Income Taxes

The reconciliations of income (loss) attributable to continuing operations at the U.S. federal statutory tax rate to income tax expense are as follows (in thousands):
 
 
Three Months Ended
 
Nine Months Ended
 
 
September 30,
 
September 30,
 
 
2014
 
2013
 
2014
 
2013
Amount:
 
 
 
 
 
 
 
 
Federal statutory tax
 
$
37,802

 
$
38,333

 
$
117,778

 
$
128,446

Tax exempt revenue
 
(2,164
)
 
(1,860
)
 
(6,254
)
 
(5,405
)
Effect of state income taxes, net of federal benefit
 
2,328

 
2,072

 
7,655

 
8,572

Utilization of tax credits
 
(2,746
)
 
(1,669
)
 
(8,213
)
 
(5,217
)
Bank-owned life insurance
 
(806
)
 
(871
)
 
(2,358
)
 
(2,749
)
Reduction of tax accrual
 
(2,281
)
 
(1,400
)
 
(2,281
)
 
(1,400
)
Charitable contributions to BOKF Foundation
 
—

 
(1,115
)
 
(427
)
 
(1,115
)
Other, net
 
(254
)
 
(29
)
 
710

 
848

Total
 
$
31,879

 
$
33,461

 
$
106,610

 
$
121,980


 
 
Three Months Ended
 
Nine Months Ended
 
 
September 30,
 
September 30,
 
 
2014
 
2013
 
2014
 
2013
Percent of pretax income:
 
 
 
 
 
 
 
 
Federal statutory tax
 
35
 %
 
35
 %
 
35
 %
 
35
 %
Tax exempt revenue
 
(2
)
 
(2
)
 
(2
)
 
(1
)
Effect of state income taxes, net of federal benefit
 
3

 
2

 
3

 
2

Utilization of tax credits
 
(3
)
 
(1
)
 
(2
)
 
(1
)
Bank-owned life insurance
 
(1
)
 
(1
)
 
(1
)
 
(1
)
Reduction of tax accrual
 
(2
)
 
(1
)
 
(1
)
 
(1
)
Charitable contributions to BOKF Foundation
 
—

 
(1
)
 
—

 
—

Other, net
 
—

 
—

 
—

 
—

Total
 
30
 %
 
31
 %
 
32
 %
 
33
 %