Derivatives (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets	$ 1,328	$ 3,315
Derivative Liabilities	(3,160)	(1,970)
Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets	0	0
Derivative Liabilities	(1,551)	(1,818)
Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets	1,293	945
Derivative Liabilities	0	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Assets	35	2,370
Derivative Liabilities	$ (1,609)	$ (152)