Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 291,077	$ 262,065
Swedish Kronor
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	75,879	48,555
Canadian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	46,374	15,645
Brazil, Brazil Real
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	10,386	2,747
Australian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	1,960	1,653
United Kingdom, Pounds
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	24,954	33,862
Euro
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	129,730	156,352
Japanese Yen
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	898	3,251
Other
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 896	$ 0