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Supplemental Cash Flow Information (Tables)
 9 Months Ended
Sep. 30, 2019
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:
 
 
Nine Months Ended 
 September 30,
(in thousands)
 
2019
 
2018
 
 
 
 
 
Accounts receivable
 
$
(22,567
)
 
$
(9,317
)
Other current assets
 
(7,508
)
 
(5,219
)
Accounts payable
 
15,156

 
14,154

Accrued employee compensation and benefits
 
(5,119
)
 
(6,320
)
Other accrued liabilities
 
6,583

 
6,322

Unearned revenue
 
(2,511
)
 
10,339

Other, net
 
(18,011
)
 
281

Total
 
$
(33,977
)
 
$
10,240