Debt (Tender Offer and Redemption of Notes) (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 10.25% Senior notes due 2014	Apr. 03, 2012 10.25% Senior notes due 2014	Jun. 30, 2012 8.25% Senior subordinated notes due 2016	Jun. 30, 2012 Premium Paid Over Par 10.25% Senior notes due 2014	Jun. 30, 2012 Premium Paid Over Par 8.25% Senior subordinated notes due 2016	Jun. 30, 2012 Write-off of Deferred Debt Issuance Cost and Net Discount 10.25% Senior notes due 2014
Debt Instrument
Aggregate principal amount of tender offer					$ 150,000,000
Repayments of Unsecured Debt					181,500,000
Loss on extinguishment of debt	(41,526,000)	0	(41,526,000)	0	(30,900,000)		(10,600,000)	(26,400,000)	(8,300,000)	(4,500,000)
Remaining unsecured debt after redemption						205,300,000
Extinguishment of Debt, Amount							200,000,000
Repayments of Subordinated Debt							215,500,000
Write off of Deferred Debt Issuance Cost							$ 2,300,000