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Restructuring Activities (Tables)
 3 Months Ended
Mar. 31, 2017
Restructuring and Related Activities [Abstract]  
Reconciliation of severance-related accrual activity
The following is a reconciliation of the severance-related accrual activity for the period:
 
Accrued Severance and Other Employee Costs
Beginning Balance
$
—

Accrued restructuring expenses
8,565

Payments
(4,781
)
Ending Balance
$
3,784