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Divestiture (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 06, 2017
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Long Lived Assets Held-for-sale [Line Items]            
Long-lived assets   $ 0   $ 0    
Outside professional fees related to anticipated divestiture           $ 700
Proceeds from the sale of facility and related business lines $ 12,457     $ 12,457 $ 0  
Non-cash loss on assets held for sale   $ 600 $ 11,000      
Selling, General and Administrative Expenses [Member]            
Long Lived Assets Held-for-sale [Line Items]            
Impairment charges           $ 10,800