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Severance and Other Charges (Tables)
 9 Months Ended
Sep. 30, 2016
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
Below is a reconciliation of the beginning and ending liability balance (in thousands):

 
International Services
 
U.S. Services
 
Tubular Sales
 
Total
Beginning balance, December 31, 2015
$
78

 
$
22,166

 
$
—

 
$
22,244

Additions for costs expensed
10,608

 
8,065

 
185

 
18,858

Other adjustments
—

 
(535
)
 
535

 
—

Severance and other payments
(3,886
)
 
(21,254
)
 
(526
)
 
(25,666
)
Ending balance, September 30, 2016
$
6,800

 
$
8,442

 
$
194

 
$
15,436