v3.8.0.1
Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2017
Accrued Liabilities, Current [Abstract]  
Accrued Liabilities
Accrued liabilities consist of the following as of December 31:
In Thousands
2017
 
2016
Sales volume discounts payable
$
17,386

 
$
13,590

Property taxes payable
3,802

 
3,932

Accrued salaries
8,318

 
6,198

Other accrued liabilities
5,499

 
4,266

Total accrued liabilities
$
35,005

 
$
27,986