Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative, Notional Amount	$ 148,788	$ 119,008
Swedish kronor
Derivative, Notional Amount	71,088	67,809
British pound sterling
Derivative, Notional Amount	41,396	14,928
Canada, Dollars
Derivative, Notional Amount	20,852	17,446
Brazil, Brazil Real
Derivative, Notional Amount	6,240	2,449
Australian dollar
Derivative, Notional Amount	3,830	6,566
Japan, Yen
Derivative, Notional Amount	3,765	3,718
Euro
Derivative, Notional Amount	1,441	5,391
Other
Derivative, Notional Amount	$ 176	$ 701