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Federal and State Income Taxes Federal and State Income Taxes
 6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]
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
June 30,
 
Six Months Ended
June 30,
 
 
2017
 
2016
 
2017
 
2016
Amount:
 
 
 
 
 
 
 
 
Federal statutory tax
 
$
47,800

 
$
33,869

 
$
92,168

 
$
55,715

Tax exempt revenue
 
(3,224
)
 
(2,568
)
 
(6,335
)
 
(5,100
)
Effect of state income taxes, net of federal benefit
 
2,944

 
1,557

 
5,389

 
3,858

Utilization of tax credits:
 
 
 
 
 
 
 
 
Low-income housing tax credit, net of amortization
 
(526
)
 
(572
)
 
(2,249
)
 
(1,882
)
Other tax credits
 
(363
)
 
(521
)
 
(727
)
 
(1,042
)
Bank-owned life insurance
 
(775
)
 
(810
)
 
(1,547
)
 
(1,601
)
Share-based compensation
 
1,636

 
—

 
(2,301
)
 
—

Other, net
 
213

 
(458
)
 
1,410

 
1,977

Total income tax expense
 
$
47,705

 
$
30,497

 
$
85,808

 
$
51,925



 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
 
2017
 
2016
 
2017
 
2016
Percent of pretax income:
 
 
 
 
 
 
 
 
Federal statutory tax
 
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
Tax exempt revenue
 
(2.4
)
 
(2.7
)
 
(2.4
)
 
(3.2
)
Effect of state income taxes, net of federal benefit
 
2.2

 
1.6

 
2.0

 
2.4

Utilization of tax credits:
 
 
 
 
 
 
 
 
Low-income housing tax credit, net of amortization
 
(0.4
)
 
(0.6
)
 
(0.8
)
 
(1.2
)
Other tax credits
 
(0.3
)
 
(0.5
)
 
(0.3
)
 
(0.6
)
Bank-owned life insurance
 
(0.6
)
 
(0.8
)
 
(0.6
)
 
(1.0
)
Share-based compensation
 
1.2

 
—

 
(0.9
)
 
—

Other, net
 
0.2

 
(0.5
)
 
0.6

 
1.2

Total
 
34.9
 %
 
31.5
 %
 
32.6
 %
 
32.6
 %