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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning of year $ (48,091) $ (15,823)  
End of year (57,982) (48,091) $ (15,823)
Net derivative instruments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning of year 0 0 0
Net derivative instrument loss, net of tax (17) 0 0
End of year (17) 0 0
Cumulative translation adjustments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning of year (48,091) (15,823) 25,860
Translation adjustments (9,874) (32,268) (41,683)
End of year $ (57,965) $ (48,091) $ (15,823)