Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 350,371	$ 262,065
Swedish Kronor
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	80,790	48,555
Canadian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	55,044	15,645
British Pound Sterling
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	21,255	33,862
Brazil, Brazil Real
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	8,102	2,747
Australian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	2,034	1,653
Euro
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	179,979	156,352
Japanese Yen
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	2,896	3,251
Other
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 271	$ 0