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Accumulated Other Comprehensive Loss (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
Beginning Balance $ (53,225)
Other comprehensive income 8,351
Ending Balance (44,874)
Foreign Currency Translation Adjustment [Member]  
Beginning Balance (50,450)
Other comprehensive income 8,331
Ending Balance (42,119)
Defined Benefit Pension Plan [Member]  
Beginning Balance (2,775)
Other comprehensive income 20
Ending Balance $ (2,755)