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Supplemental Cash Flow Information (Tables)
 3 Months Ended
Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]  
Change in certain working capital accounts
The following table presents additional information about the change in certain working capital accounts:
 
 
Three Months Ended 
 March 31,
(in thousands)
 
2017
 
2016
 
 
 
 
 
Accounts and notes receivable
 
$
2,421

 
$
(892
)
Accounts payable
 
3,535

 
(970
)
Accrued employee compensation and benefits
 
(13,290
)
 
(14,932
)
Other accrued liabilities
 
718

 
(2,424
)
Other, net
 
(1,336
)
 
(1,983
)
Total
 
$
(7,952
)
 
$
(21,201
)