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Loss Reserves - Delinquent Items (Details) - loan | Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Dec. 31, 2016
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Aging of the Primary Delinquent Inventory [Abstract] |  |  |  |
3 months or less (in loans) | 8,770 | 17,119 | 9,184 |
3 months or less (as a percent) | 21.00% | 37.00% | 20.00% |
4 - 11 months (in loans) | 16,429 | 12,050 | 13,617 |
4 - 11 months (as a percent) | 40.00% | 26.00% | 30.00% |
12 months or more (in loans) | 16,044 | 17,387 | 22,548 |
12 months or more (as a percent) | 39.00% | 37.00% | 50.00% |
Total primary delinquent inventory (in loans) | 41,243 | 46,556 | 45,349 | 50,282
Total primary delinquent inventory (as a percent) | 100.00% | 100.00% | 100.00% |
Primary claims received inventory included in ending delinquent inventory (in loans) | 819 | 954 | 1,390 |
Primary claims received inventory included in ending delinquent inventory (as a percent) | 2.00% | 2.00% | 3.00% |
Percent of 12 months or more delinquent inventory, delinquent for more than 36 months (as a percent) | 44.00% | 45.00% | 48.00% |
Number of payments delinquent [Abstract] |  |  |  |
3 payments or less (in loans) | 16,023 | 21,678 | 15,692 |
3 payments or less (as a percent) | 39.00% | 46.00% | 35.00% |
4 - 11 payments (in loans) | 13,734 | 12,446 | 12,275 |
4 - 11 payments (as a percent) | 33.00% | 27.00% | 27.00% |
12 payments or more (in loans) | 11,486 | 12,432 | 17,382 |
12 payments or more (as a percent) | 28.00% | 27.00% | 38.00% |
Total primary delinquent inventory (in loans) | 41,243 | 46,556 | 45,349 | 50,282
Total primary delinquent inventory (as a percent) | 100.00% | 100.00% | 100.00% |
Percent of 12 payments or more delinquent inventory, 36 payments or more delinquent (as a percent) | 42.00% | 43.00% | 45.00% |
Pool insurance delinquent inventory (in loans) | 1,200 | 1,309 | 1,714 |

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- References No definition available. + Details
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- Definition The number of loans in the primary default inventory that have been delinquent for twelve payments or more. + References No definition available. + Details
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- Definition The percentage of loans in the primary default inventory that have been delinquent for twelve payments or more. + References No definition available. + Details
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- Definition The number of loans in the primary default inventory that have been delinquent for three payments or less. + References No definition available. + Details
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- Definition The percentage of loans in the primary default inventory that have been delinquent for three payments or less. + References No definition available. + Details
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- Definition The number of loans in the primary default inventory that have been delinquent for at least four payments but no more than eleven payments. + References No definition available. + Details
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- Definition The percentage of loans in the primary default inventory that have been delinquent for at least four payments but no more than eleven payments. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The number of loans included in the pool insurance notice inventory as of the end of the reporting period. + References No definition available. + Details
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- Definition The number of loans in the primary default inventory. + References No definition available. + Details
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- Definition The number of loans in the primary default inventory that are in the claims received inventory. + References No definition available. + Details
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- Definition The percentage of loans in the primary default inventory that are in the claims received inventory. + References No definition available. + Details
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- Definition The number of loans that have been in the primary default inventory for at least four months but no greater than eleven months as of the balance sheet date. + References No definition available. + Details
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- Definition The percentage of loans that have been in the primary default inventory for at least four months but no greater than eleven months as of the balance sheet date. + References No definition available. + Details
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- Definition The percentage of loans in the primary default inventory. + References No definition available. + Details
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- Definition The number of loans that have been in the primary default inventory for three months or less as of the balance sheet date. + References No definition available. + Details
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- Definition The percentage of loans that have been in the primary default inventory for three months or less as of the balance sheet date. + References No definition available. + Details
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- Definition The number of loans that have been in the primary default inventory for twelve months or more as of the balance sheet date. + References No definition available. + Details
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- Definition Primary Default Inventory Twelve Months Or More, Percent Of Primary Default Inventory In Default For Twelve Months Or More In Default For More Than Thirty Six Consecutive Months + References No definition available. + Details
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- Definition The percentage of loans that have been in the primary default inventory for twelve months or more as of the balance sheet date. + References No definition available. + Details
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- Definition Primary Delinquent Inventory Twelve Payments Or More, Percent Of Primary Delinquent Inventory Delinquent For Twelve Payments or More Delinquent For Thirty Six Payments or More + References No definition available. + Details
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