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Restructuring - Restructuring Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Restructuring Reserve [Roll Forward]        
Restructuring Reserve     $ 1,857  
Restructuring charges $ 104 $ 0 1,405 $ 2,930
Reclassification to operating lease liabilities     (554)  
Payments for Restructuring     (2,324)  
Restructuring Reserve 384   384  
Employee Severance [Member]        
Restructuring Reserve [Roll Forward]        
Restructuring Reserve     1,266  
Restructuring charges     1,405  
Reclassification to operating lease liabilities     0  
Payments for Restructuring     (2,317)  
Restructuring Reserve 354   354  
Facility Closing [Member]        
Restructuring Reserve [Roll Forward]        
Restructuring Reserve     591  
Restructuring charges     0  
Reclassification to operating lease liabilities     (554)  
Payments for Restructuring     (7)  
Restructuring Reserve $ 30   $ 30