Derivatives (Narrative - Interest Rate Swaps) (Details) (Fair Value Hedging [Member], USD $)	3 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012 Interest rate contracts [Member] Old Rate Agreement [Member]	Jun. 30, 2012 Interest Expense [Member] Interest rate contracts [Member] Old Rate Agreement [Member]	Apr. 18, 2012 Senior Notes [Member] Interest rate contracts [Member] Old Rate Agreement [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Other (Expense) Income [Member] Interest rate contracts [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Other (Expense) Income [Member] Interest rate contracts [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Other (Expense) Income [Member] Interest rate contracts [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Other (Expense) Income [Member] Interest rate contracts [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Loss on Redemption of Debt [Member] Interest rate contracts [Member] Old Rate Agreement [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Loss on Redemption of Debt [Member] Interest rate contracts [Member] Old Rate Agreement [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Loss on Redemption of Debt [Member] Interest rate contracts [Member] Old Rate Agreement [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Loss on Redemption of Debt [Member] Interest rate contracts [Member] Old Rate Agreement [Member]
Derivative [Line Items]
Derivative, notional amount			$ 0
Proceeds from termination of hedge	3,600,000
Gain (loss) on carrying value adjustment on debt related to interest rate swap		100,000										3,502,000	0	3,502,000	0
Net impact on Condensed Consolidated Statements of Comprehensive Income (Loss)				$ 3,329,000	$ (144,000)	$ 3,748,000	$ 492,000	$ (173,000)	$ (144,000)	$ 246,000	$ 492,000