Fair Value Of Financial Instruments (Schedule Of Assets And Liabilities, Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 7.8	$ 9.0
Restricted cash and cash equivalents	116.3	92.4
Restricted securities available for sale	47.5	46.1
Net investment in Loans receivable	2,044.7	1,951.4
Revolving secured line of credit	115.9	43.5
Secured financing	872.8	863.0
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	7.8	9.0
Restricted cash and cash equivalents	116.3	92.4
Restricted securities available for sale	27.6	27.3
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted securities available for sale	19.9	18.8
Revolving secured line of credit	115.9	43.5
Secured financing	872.8	863.0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net investment in Loans receivable	2,044.7	1,951.4
Mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes	4.0	4.0
Mortgages [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes	4.0	4.0
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes	380.6	381.9
Senior Notes [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes	$ 380.6	$ 381.9