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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, 2017 | Dec. 31, 2016
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Assets, Fair Value Disclosure [Abstract] |  |  |
Cash and cash equivalents | [1] | $ 8.2 | $ 14.6
Restricted cash and cash equivalents | [1] | 255.6 | 224.7
Restricted securities available for sale | [2] | 46.1 | 45.3
Net investment in Loans receivable | [1] | 4,741.5 | 3,955.9
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Revolving secured line of credit | [1] | 13.9 | 0.0
Secured financing | [1] | 2,527.6 | 2,072.0
Senior notes | [1] | 569.4 | 560.5
Carrying Amount [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Cash and cash equivalents |  | 8.2 | 14.6
Restricted cash and cash equivalents |  | 255.6 | 224.7
Restricted securities available for sale |  | 46.1 | 45.3
Net investment in Loans receivable |  | 4,619.6 | 3,886.6
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Revolving secured line of credit |  | 13.9 | 0.0
Secured financing |  | 2,514.1 | 2,062.4
Senior notes |  | 542.8 | 541.3
Estimated Fair Value [Member] |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |
Cash and cash equivalents |  | 8.2 | 14.6
Restricted cash and cash equivalents |  | 255.6 | 224.7
Restricted securities available for sale |  | 46.1 | 45.3
Net investment in Loans receivable |  | 4,741.5 | 3,955.9
Liabilities, Fair Value Disclosure [Abstract] |  |  |
Revolving secured line of credit |  | 13.9 | 0.0
Secured financing |  | 2,527.6 | 2,072.0
Senior notes |  | $ 569.4 | $ 560.5
[1] | at amortized cost with fair value disclosed.
[2] | Measured at fair value on a recurring basis.

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- Definition The carrying amount of securities categorized neither as held-to-maturity nor trading which serve as security for borrowings or other arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(f)) -URI http://asc.fasb.org/extlink&oid=6488002&loc=d3e600178-122990 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX210.4-08(b)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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