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Fair Value Of Financial Instruments (Schedule Of Comparison Of The Carrying Value And Estimated Fair Value Of These Financial Instruments) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Assets, Fair Value Disclosure [Abstract] |  |  |  |
Cash and cash equivalents | [1] | $ 25.7 |  | $ 8.2
Restricted cash and cash equivalents | [1] | 303.6 |  | 255.6
Restricted securities available for sale | [2] | 58.6 |  | 46.1
Net investment in Loans receivable | [1] | 5,855.1 |  | 4,741.5
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |
Revolving secured line of credit | [1] | 171.9 |  | 13.9
Secured financing | [1] | 3,100.9 |  | 2,527.6
Senior notes | [1] | 556.3 |  | 569.4
Other Borrowings |  | 11.9 | [1] | 0.0
Carrying Amount [Member] |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Cash and cash equivalents |  | 25.7 |  | 8.2
Restricted cash and cash equivalents |  | 303.6 |  | 255.6
Restricted securities available for sale |  | 58.6 |  | 46.1
Net investment in Loans receivable |  | 5,763.3 |  | 4,619.6
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |
Revolving secured line of credit |  | 171.9 |  | 13.9
Secured financing |  | 3,092.7 |  | 2,514.1
Senior notes |  | 544.4 |  | 542.8
Estimated Fair Value [Member] |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Cash and cash equivalents |  | 25.7 |  | 8.2
Restricted cash and cash equivalents |  | 303.6 |  | 255.6
Restricted securities available for sale |  | 58.6 |  | 46.1
Net investment in Loans receivable |  | 5,855.1 |  | 4,741.5
Liabilities, Fair Value Disclosure [Abstract] |  |  |  |
Revolving secured line of credit |  | 171.9 |  | 13.9
Secured financing |  | 3,100.9 |  | 2,527.6
Senior notes |  | $ 556.3 |  | $ 569.4
[1] | Measured at amortized cost with fair value disclosed.
[2] | Measured at fair value on a recurring basis.

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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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