Derivative Financial Instruments - Narratives (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 instrument	Dec. 31, 2015 USD ($)	Sep. 30, 2012 USD ($) instrument	Jun. 24, 2012 USD ($) instrument
Derivative
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax	$ 486
Foreign exchange derivative
Derivative
Derivative Asset	548
Derivative Liability	26
Cash Flow Hedge | Designated As Hedging | Foreign currency forward contracts
Derivative
Foreign currency cash flow hedge gain to be reclassified during next 12 months	0
Derivative, notional amount	16,500
Derivative Asset	522
Derivative Liability		$ 601		$ 0
Cash Flow Hedge | Designated As Hedging | Interest rate swap
Derivative
Derivative, notional amount					$ 25,000	$ 50,000
Number of derivative instruments held | instrument			3		4	4
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months	64
Derivative Liability	$ (822)	$ (753)		$ 768