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Debt (Schedule Of Outstanding Debt Amount) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Revolving secured line of credit principal balance outstanding |  | $ 2.6 | $ 95.9 |
Secured Financings Principal balance outstanding |  | 3,811.5 | 3,711.6 |
Senior notes principal balance outstanding |  | 792.5 | 790.6 |
Mortgage note principal outstanding balance | [1] | 9.7 | 10.5 |
Restricted cash and cash equivalents pledged as collateral |  | 410.9 | 380.2 | $ 330.3
Revolving Secured Line Of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Revolving secured line of credit principal balance outstanding |  | 2.6 | 95.9 |
Amount available for borrowing | [2] | $ 432.4 | $ 244.1 |
Interest rate |  | 1.98% | 2.02% |
Warehouse Facility II [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 75.0 |
Loans pledged as collateral |  | 0.0 | 91.8 |
Restricted cash and cash equivalents pledged as collateral |  | 1.0 | 3.0 |
Amount available for borrowing | [2] | $ 400.0 | $ 325.0 |
Interest rate |  | 0.00% | 1.90% |
Warehouse Facility IV [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  |  | $ 0.0 |
Loans pledged as collateral |  |  | 0.0 |
Restricted cash and cash equivalents pledged as collateral |  | $ 1.0 | 1.0 |
Amount available for borrowing | [2] | $ 300.0 | $ 300.0 |
Interest rate |  | 0.00% | 0.00% |
Warehouse Facility V [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 |  |
Loans pledged as collateral |  | 0.0 |  |
Restricted cash and cash equivalents pledged as collateral |  | 1.0 | $ 1.0 |
Amount available for borrowing | [2] | $ 125.0 | $ 125.0 |
Interest rate |  | 0.00% | 0.00% |
Warehouse Facility VI [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 0.0 |
Loans pledged as collateral |  | 0.0 | 0.0 |
Restricted cash and cash equivalents pledged as collateral |  | 0.0 | 0.0 |
Amount available for borrowing | [2] | $ 75.0 | $ 75.0 |
Interest rate |  | 0.00% | 0.00% |
Warehouse Facility VII [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 0.0 |
Loans pledged as collateral |  | 0.0 | 0.0 |
Restricted cash and cash equivalents pledged as collateral |  | 0.0 | 1.0 |
Amount available for borrowing | [2] | $ 0.0 | $ 150.0 |
Interest rate |  | 0.00% | 0.00% |
Warehouse Facility VIII [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 0.0 |
Loans pledged as collateral |  | 0.0 | 0.0 |
Restricted cash and cash equivalents pledged as collateral |  | 0.0 | 0.0 |
Amount available for borrowing | [2] | $ 200.0 | $ 200.0 |
Interest rate |  | 0.00% | 0.00% |
Term ABS 2017-3 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 70.9 |
Loans pledged as collateral |  | 0.0 | 215.8 |
Restricted cash and cash equivalents pledged as collateral |  | $ 0.0 | $ 23.2 |
Interest rate |  | 0.00% | 3.41% |
Term ABS 2018-1 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 196.4 |
Loans pledged as collateral |  | 0.0 | 394.1 |
Restricted cash and cash equivalents pledged as collateral |  | $ 0.0 | $ 36.2 |
Interest rate |  | 0.00% | 3.61% |
Term ABS 2018-2 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 254.3 |
Loans pledged as collateral |  | 0.0 | 410.0 |
Restricted cash and cash equivalents pledged as collateral |  | $ 0.0 | $ 34.6 |
Interest rate |  | 0.00% | 3.85% |
Term ABS 2018-3 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 0.0 | $ 296.1 |
Loans pledged as collateral |  | 0.0 | 408.8 |
Restricted cash and cash equivalents pledged as collateral |  | $ 0.0 | $ 32.9 |
Interest rate |  | 0.00% | 3.78% |
Term ABS 2019-1 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 124.6 | $ 402.5 |
Loans pledged as collateral |  | 292.4 | 482.3 |
Restricted cash and cash equivalents pledged as collateral |  | $ 31.8 | $ 35.4 |
Interest rate |  | 3.86% | 3.53% |
Term ABS 2019-2 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 500.0 | $ 500.0 |
Loans pledged as collateral |  | 582.1 | 575.4 |
Restricted cash and cash equivalents pledged as collateral |  | $ 50.7 | $ 41.2 |
Interest rate |  | 3.13% | 3.13% |
Term ABS 2019-3 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 323.9 | $ 351.7 |
Loans pledged as collateral |  | 382.9 | 420.9 |
Restricted cash and cash equivalents pledged as collateral |  | $ 36.5 | $ 30.8 |
Interest rate |  | 2.58% | 2.56% |
Term ABS 2020-1 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 500.0 | $ 500.0 |
Loans pledged as collateral |  | 591.6 | 749.3 |
Restricted cash and cash equivalents pledged as collateral |  | $ 51.9 | $ 48.8 |
Interest rate |  | 2.18% | 2.18% |
Term ABS 2020-2 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 481.8 | $ 481.8 |
Loans pledged as collateral |  | 579.5 | 606.6 |
Restricted cash and cash equivalents pledged as collateral |  | $ 50.1 | $ 41.1 |
Interest rate |  | 1.65% | 1.65% |
Term ABS 2020-3 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 600.0 | $ 600.0 |
Loans pledged as collateral |  | 688.1 | 759.1 |
Restricted cash and cash equivalents pledged as collateral |  | $ 58.4 | $ 49.3 |
Interest rate |  | 1.44% | 1.44% |
Term ABS 2021-1 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 100.0 |  |
Loans pledged as collateral |  | 143.7 |  |
Restricted cash and cash equivalents pledged as collateral |  | $ 10.2 |  |
Interest rate |  | 2.10% |  |
Term ABS 2021-2 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 500.0 |  |
Loans pledged as collateral |  | 618.7 |  |
Restricted cash and cash equivalents pledged as collateral |  | $ 49.2 |  |
Interest rate |  | 1.12% |  |
Term ABS 2021-3 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 450.0 |  |
Loans pledged as collateral |  | 619.8 |  |
Restricted cash and cash equivalents pledged as collateral |  | $ 46.5 |  |
Interest rate |  | 1.14% |  |
Term ABS 2021-4 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Secured Financings Principal balance outstanding |  | $ 250.1 |  |
Loans pledged as collateral |  | 281.2 |  |
Restricted cash and cash equivalents pledged as collateral |  | $ 22.1 |  |
Interest rate |  | 1.44% |  |
2024 Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Senior notes principal balance outstanding |  | $ 400.0 | $ 400.0 |
Interest rate |  | 5.125% | 5.125% |
2026 Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Senior notes principal balance outstanding |  | $ 400.0 | $ 400.0 |
Interest rate |  | 6.625% | 6.625% |
Mortgage [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgage note principal outstanding balance |  | $ 9.7 | $ 10.5 |
Interest rate |  | 1.60% | 1.65% |
[1] | Measured at amortized cost with fair value disclosed.
[2] | (1) Availability may be limited by the amount of assets pledged as collateral.

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