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Management Actions (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]        
Approximate time anticipated savings will offset the restructuring charge   1 year 1 year  
Restructuring Reserve [Roll Forward]        
Restructuring Charges, net of noncash expenses       $ 9,558
Restructuring Reserve beginning balance $ 3,436      
Cash Payments (714)     (6,312)
Foreign currency adjustments 104     190
Restructuring Reserve ending balance $ 2,826 $ 3,436   $ 3,436
Selling and Administrative Expense        
Restructuring Cost and Reserve [Line Items]        
Restructuring Charges   $ 2,501 $ 8,018  
Other associated restructuring charges     $ 961