Securitizations and Variable Interest Entities Schedule of Interest in Variable Interest Entity (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2013 Salus Capital Partners LLC	Feb. 28, 2013 Salus Capital Partners LLC	Feb. 14, 2013 Salus Capital Partners LLC	Sep. 30, 2014 Salus Capital Partners LLC Variable Interest Entity, Primary Beneficiary	Sep. 30, 2013 Salus Capital Partners LLC Variable Interest Entity, Primary Beneficiary	Sep. 23, 2013 Salus Capital Partners LLC Variable Interest Entity, Primary Beneficiary	Feb. 28, 2013 Salus Capital Partners LLC Variable Interest Entity, Primary Beneficiary	Sep. 30, 2014 Salus Capital Partners LLC Variable Interest Entity, Primary Beneficiary Unaffiliated long-term debt of consolidated variable-interest entity	Sep. 30, 2013 Salus Capital Partners LLC Variable Interest Entity, Primary Beneficiary Unaffiliated long-term debt of consolidated variable-interest entity
Variable Interest Entity [Line Items]
Asset-based loans	$ 811,600,000	$ 560,400,000	$ 136,500,000	$ 166,900,000	$ 331,100,000	$ 331,100,000		$ 325,000,000	$ 175,500,000
Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement					182,900,000	192,000,000	181,800,000
Debt Instrument, Unamortized Discount										1,000,000	1,100,000
Variable Interest Entity, Consolidated, Carrying Amount, Asset-Backed Loans Receivable, Portion Sellers Interest						292,000,000	302,100,000
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount						455,900,000	337,800,000
Variable Interest Entity, Consolidated, Carrying Amount, Asset-Backed Loans Receivable						455,900,000	337,800,000
Variable Interest Entity, Consolidated, Carrying Amount, Other Assets						35,500,000	156,700,000
Variable Interest Entity, Consolidated, Carrying Amount, Assets						491,400,000	494,500,000
VIE, consolidated carrying amount obligations						484,000,000	485,000,000
Variable Interest Entity, Consolidated, Carrying Amount, Other Liabilities						6,700,000	2,900,000
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities						$ 490,700,000	$ 487,900,000