Subsequent Events (Details) (USD $)	3 Months Ended			9 Months Ended				3 Months Ended		3 Months Ended	9 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Dec. 31, 2013 Senior Subordinated Notes [Member]	Oct. 18, 2013 Senior Subordinated Notes [Member]	Sep. 30, 2013 Subordinated Debt [Member]	Sep. 30, 2013 Subordinated Debt [Member]	Oct. 18, 2013 Subordinated Debt [Member]	Aug. 01, 2013 Subordinated Debt [Member]	Mar. 08, 2013 Subordinated Debt [Member]	Dec. 31, 2012 Subordinated Debt [Member]	Mar. 10, 2010 Subordinated Debt [Member]	Aug. 01, 2013 IPO Proceeds [Member] Subordinated Debt [Member]	Aug. 01, 2013 Term Loan Incremental Borrowings [Member] Subordinated Debt [Member]
Subsequent Event [Line Items]
Debt Instrument, Repurchased Face Amount												$ 155,000,000	$ 324,000,000	$ 50,000,000		$ 28,500,000	$ 146,000,000	$ 178,000,000
Redemption Premium, percentage of par value									104.178%				106.268%	106.268%
Extinguishment of Debt, Accrued Interest Paid to Lenders												200,000	12,000,000	2,500,000
Debt, short-term and long-term						1,532,800,000	1,339,500,000			247,500,000	247,500,000	92,500,000			621,500,000
Net loss on extinguishments of long-term debt		41,300,000	0	55,500,000	9,400,000			8,500,000		24,600,000	3,900,000
Extinguishment of Debt, Fees Paid to Lenders									6,500,000				20,300,000	3,100,000
Write off of unamortized deferred financing costs								$ 2,000,000		$ 4,300,000	$ 800,000
Common Stock, Dividends, Per Share, Declared	$ 0.0425