Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 336,946	$ 262,065
Swedish Kronor
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	74,191	48,555
Canadian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	56,475	15,645
Brazil, Brazil Real
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	9,562	2,747
Australian Dollar
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	2,129	1,653
United Kingdom, Pounds
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	668	33,862
Euro
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	190,451	156,352
Japanese Yen
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	2,985	3,251
Other
Derivative [Line Items]
Notional amounts of foreign currency forward contracts	$ 485	$ 0