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Restructuring and Other Charges (Narratives) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Restructuring and Other Charges        
Restructuring and other charges $ 366 $ 3,004 $ 823 $ 11,069
Employee termination benefits   2,268   9,269
Employee Severance Liability        
Restructuring and Other Charges        
Accrued Liabilities 300   300  
Spin-off        
Restructuring and Other Charges        
Restructuring and other charges $ 400 $ 700 823 $ 1,800
Retention benefits        
Restructuring and Other Charges        
Expected retention payments, current year     $ 600