Subsequent Events (Details) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2011 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Dec. 31, 2011 Term Loan [Member]	Dec. 31, 2013 Subordinated Debt [Member]	Dec. 31, 2012 Subordinated Debt [Member]	Dec. 31, 2010 Subordinated Debt [Member]	Mar. 08, 2013 Subordinated Debt [Member]	Dec. 21, 2012 Subordinated Debt [Member]	Mar. 10, 2010 Subordinated Debt [Member]
Subsequent Event [Line Items]
Term Loan, Repayments				$ 132,000,000	$ 40,000,000	$ 201,000,000
Senior Subordinated Notes, Amount Repurchased											50,000,000	100,000,000	28,500,000
Premium, percentage of par value											106.27%	106.27%
Gains (Losses) on Extinguishment of Debt	$ 17,200,000	$ 118,900,000	$ (2,000,000)				$ 3,200,000	$ 3,900,000	$ 7,800,000	$ (9,200,000)