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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Changes in accumulated other comprehensive income, net of tax        
Balance at the beginning of period     $ (1,431)  
Other comprehensive income and pension reclassification $ 962 $ (1,654) 1,607 $ (2,297)
Balance at the end of period 176   176  
Foreign currency        
Changes in accumulated other comprehensive income, net of tax        
Balance at the beginning of period     (744)  
Other comprehensive income and pension reclassification     1,529  
Balance at the end of period 785   785  
Defined benefit pension plan        
Changes in accumulated other comprehensive income, net of tax        
Balance at the beginning of period     (687)  
Other comprehensive income and pension reclassification     78  
Balance at the end of period $ (609)   $ (609)