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Note 11 - Losses and LAE - Reserve for Losses and LAE by Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Reserve for losses and LAE | $ 848,413 | $ 404,765 |  |
Mortgage insurance loss reserves |  |  |  |
Reserve for losses and LAE | 844,107 | 401,273 | $ 397,891 | $ 507,588
Services loss reserves |  |  |  |
Reserve for losses and LAE | 4,306 | 3,492 |  |
Primary Case Reserves | Prime Mortgage Insurance Product | Mortgage insurance loss reserves |  |  |  |
Reserve for losses and LAE | $ 799,500 | $ 339,800 |  |

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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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