Derivatives (Gain Loss on Debt and Swap) (Details) (Fair Value Hedging [Member], Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Net impact on Condensed Consolidated Statements of Comprehensive Income (Loss)	$ (666)		$ 205	$ 3,082	$ 697
Other Income (Expense) [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net impact on Condensed Consolidated Statements of Comprehensive Income (Loss)	(666)		205	(420)	697
Old Rate Agreement [Member] | Loss on Redemption of Debt [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on carrying value adjustment on debt related to interest rate swap	$ 0	$ 3,502	$ 0	$ 3,502	$ 0