Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 95,896	$ 152,984
Swedish Kronor
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	3,608	59,373
Canadian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	19,685	7,426
British Pound Sterling
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	609	34,317
Brazil, Brazil Real
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	8,598	7,794
Australian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	1,131	2,817
Euro
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	61,452	34,800
Japanese Yen
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	405	3,362
Other
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 408	$ 3,095