v3.8.0.1
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]  
Summary of Income Tax Expenses
The provisions for income tax expense are summarized as follows for the years ended December 31:
In Thousands
2017
 
2016
 
2015
Current:
 
 
 
 
 
Federal
$
24,421

 
$
17,139

 
$
7,918

State
1,411

 
1,098

 
546

Deferred:
 
 
 
 
 
Federal
(13,289
)
 
(905
)
 
16,486

State
316

 
(357
)
 
(171
)
Total Income Tax Expense
$
12,859

 
$
16,975

 
$
24,779

Summary of Differences Between Provision for Income Taxes and Income Taxes Computed Using Federal Income Tax Rate
The differences between the provision for income taxes and income taxes computed using the federal income tax rate are as follows for the years ended December 31:
In Thousands
2017
 
2016
 
2015
Amount computed using the statutory rate
$
27,956

 
$
17,769

 
$
25,334

State income taxes, net of federal tax benefit
1,166

 
482

 
244

Qualified domestic production activity deduction
(2,464
)
 
(1,712
)
 
(859
)
Effect of 2018 deferred rate change
(13,463
)
 

 

Other
(336
)
 
436

 
60

Total Income Tax Expense
$
12,859

 
$
16,975

 
$
24,779

Summary of Net Deferred Tax Liability
The tax effect of each type of temporary difference giving rise to the net deferred tax liability at December 31, 2017 and 2016 is as follows:
In Thousands
2017
 
2016
Depreciation
$
(22,121
)
 
$
(30,845
)
Inventory
(486
)
 
(5,807
)
Allowance for doubtful accounts
457

 
738

Uniform capitalization rules
610

 
932

Other
541

 
1,009

Deferred income tax liability
$
(20,999
)
 
$
(33,973
)