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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The provision (benefit) for income taxes consists of the following:

 
Three months ended
 
Six months ended
 
June 30,
2018
 
June 30,
2017
 
June 30,
2018
 
June 30,
2017
 
(in thousands)
Current
$
2,873

 
$
6,326

 
$
3,433

 
$
9,917

Deferred
18

 
(356
)
 
438

 
364

 
$
2,891

 
$
5,970

 
$
3,871

 
$
10,281

Schedule of Effective Income Tax Rate Reconciliation
The reconciliation of the Federal statutory income tax rate to the effective income tax rate is as follows:

 
Three months ended
 
Six months ended
 
June 30,
2018
 
June 30,
2017
 
June 30,
2018
 
June 30,
2017
Federal statutory rate
21.0
 %
 
35.0
 %
 
21.0
 %
 
35.0
 %
State income taxes, net of Federal benefit
6.8

 
4.5

 
6.8

 
4.0

Domestic manufacturing deduction

 
(3.1
)
 

 
(3.0
)
Excess tax benefits
(2.4
)
 
(4.8
)
 
(4.1
)
 
(5.8
)
Indian Depreciation
(4.4
)
 

 
(3.2
)
 

Other
(1.2
)
 
(1.4
)
 
(1.0
)
 
(0.2
)
Effective tax rate
19.8
 %
 
30.2
 %
 
19.5
 %
 
30.0
 %