Fair Value and Derivative Financial Instruments Fair Value and Derivative Financial Instruments (loss related to foreign exchange swaps recognized in the statements of operations) (Details) (Currency Swap [Member], Other, net [Member], Cash Flow Hedging [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Currency Swap [Member] | Other, net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange swaps not designated as hedging instruments, gain (loss), net	$ (403)	$ (887)	$ (645)	$ (719)