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Severance and Other Charges (Tables)
 3 Months Ended
Mar. 31, 2017
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
 
Total
Beginning balance, December 31, 2016
$
4,464

 
$
1,686

 
$
6,150

Additions for costs expensed
270

 
767

 
1,037

Other adjustments
5

 
58

 
63

Severance and other payments
(1,376
)
 
(1,457
)
 
(2,833
)
Ending balance, March 31, 2017
$
3,363

 
$
1,054

 
$
4,417