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Severance and Other Charges - Summary of Activity (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
Severance and other charges  
Balance, start of period $ 1,738
Provision 0
Payments (390)
Balance, end of period 1,348
Severance  
Severance and other charges  
Balance, start of period 718
Provision 0
Payments (279)
Balance, end of period 439
Lease Exit Costs  
Severance and other charges  
Balance, start of period 1,020
Provision 0
Payments (111)
Balance, end of period $ 909