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Accounts Payable and Accrued Liabilities
9 Months Ended
Sep. 30, 2018
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Liabilities
Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities at September 30, 2018 and December 31, 2017 consisted of the following (in thousands):
 
September 30,
 
December 31,
 
2018
 
2017
Accounts payable
$
17,064

 
$
33,912

Accrued compensation
28,557

 
25,510

Accrued property and other taxes
13,685

 
16,908

Accrued severance and other charges
704

 
1,444

Income taxes
41

 
8,091

Accrued purchase orders and other
34,433

 
23,020

Total accounts payable and accrued liabilities
$
94,484

 
$
108,885