Annual report pursuant to Section 13 and 15(d)

Accounts and Other Receivables (Details)

v3.6.0.2
Accounts and Other Receivables (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Accounts and Other Receivables          
Trade accounts receivable       $ 121,663 $ 98,164
Other receivables       14,171 21,724
Allowance for doubtful accounts $ (717) $ (761) $ (461) (1,090) (717)
Total accounts and other receivables, net       $ 134,744 $ 119,171
Allowance for Doubtful Accounts Receivable [Roll Forward]          
Balance at Beginning of Period (717) (761) (461)    
Additions Charged to Expense 373 126 300    
Deductions 0 (170) 0    
Balance at End of Period $ (1,090) $ (717) $ (761)