Fair Value Measurements and Derivative Instruments - Balance Sheet Hedging Instruments (Details) - Foreign currency debt - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Derivative Instruments
Carrying Value of Non-derivative instrument Designated as hedging instrument	$ 345,352	$ 311,225
Long Term Debt Current
Derivative Instruments
Carrying Value of Non-derivative instrument Designated as hedging instrument	62,431	61,601
Long-term Debt
Derivative Instruments
Carrying Value of Non-derivative instrument Designated as hedging instrument	$ 282,921	$ 249,624