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Long-term Debt - Debt Issuance Costs (Details) (USD $)	12 Months Ended
Long-term Debt - Debt Issuance Costs (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs	$ 9,100,000	$ 11,800,000
Amortization of Debt Issuance Costs	2,490,000	2,910,000	2,960,000
Senior secured notes [Member]
Debt Instrument [Line Items]
Unamortized Discount on the Senior Notes		4,100,000
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction	$ 35,700,000

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

The amount of debt issuance costs that were incurred during a noncash or partial noncash transaction.