Foreign Currency Forward Exchange Contracts - Notional Amount of Foreign Exchange Contracts (Details) - Commitments to buy or sell currencies - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
U.S. $ Equivalent	$ 25,046	$ 15,490
U.S. Equivalent Fair Value	$ 25,223	$ 15,479