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Fair Value Measurements - Summary of Financial Liability Measured at Fair Value on a Recurring Basis (Details) - Designated As Hedging - Cash Flow Hedge - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Interest rate swap      
Recurring financial liability that was measured at carrying value      
Derivative liability $ (480) $ (768) $ (1,020)
Realized gain (loss) on cash flow hedge 472 768  
Foreign currency hedges      
Recurring financial liability that was measured at carrying value      
Derivative Asset 34 0  
Realized gain (loss) on cash flow hedge 3    
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap      
Recurring financial liability that was measured at carrying value      
Derivative liability (480) (768)  
Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency hedges      
Recurring financial liability that was measured at carrying value      
Derivative Asset 34    
Recurring | Carrying Value | Interest rate swap      
Recurring financial liability that was measured at carrying value      
Derivative liability (480) $ (768)  
Recurring | Carrying Value | Foreign currency hedges      
Recurring financial liability that was measured at carrying value      
Derivative Asset $ 34