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Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Accumulated other comprehensive loss at December 31, 2014     $ (12,807)  
Net current-period other comprehensive income (loss) $ 1,953 $ 1,945 608 $ 1,284
Accumulated other comprehensive loss at June 30, 2015 (12,199)   (12,199)  
Foreign currency translation adjustments [Member]        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Accumulated other comprehensive loss at December 31, 2014     (12,807)  
Net current-period other comprehensive income (loss)     608  
Accumulated other comprehensive loss at June 30, 2015 $ (12,199)   $ (12,199)