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, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest rate swap
Recurring financial liability that was measured at carrying value
Derivative liability	$ 643	$ 753	$ (768)
Realized gain (loss) on cash flow hedge	0		928
Foreign currency hedges
Recurring financial liability that was measured at carrying value
Derivative liability		(601)	$ 0
Realized gain (loss) on cash flow hedge	144	(18)
Derivative Asset	390
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap
Recurring financial liability that was measured at carrying value
Derivative liability	643	753
Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency hedges
Recurring financial liability that was measured at carrying value
Derivative liability		601
Derivative Asset	390
Recurring | Carrying Value | Interest rate swap
Recurring financial liability that was measured at carrying value
Derivative liability	643	753
Recurring | Carrying Value | Foreign currency hedges
Recurring financial liability that was measured at carrying value
Derivative liability		$ 601
Derivative Asset	$ 390