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Note 10 - Losses and Loss Adjustment Expense Mortgage Insurance Reserve for Losses and LAE Rollforward (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Loss reserve [Roll Forward] |  |  |  |
Balance at beginning of period |  | $ 404,765 |  |
Deduct paid claims and LAE related to [Abstract] |  |  |  |
Balance at end of period |  | 418,202 |  |
Mortgage Insurance Segment |  |  |  |
Loss reserve [Roll Forward] |  |  |  |
Balance at beginning of period |  | 401,273 | [1] | $ 397,891
Less: Reinsurance recoverables | [2] | 14,594 |  | 11,009
Balance at beginning of period, net of reinsurance recoverables |  | 386,679 |  | 386,882
Add losses and LAE incurred in respect of default notices reported and unreported in [Abstract] |  |  |  |
Incurred Losses and LAE Current year | [3] | 41,242 |  | 38,922
Incurred Losses and LAE Prior years |  | (5,876) |  | (18,173)
Total incurred losses and LAE |  | 35,366 |  | 20,749
Deduct paid claims and LAE related to [Abstract] |  |  |  |
Paid Losses and LAE Current year | [3] | 0 |  | 295
Paid losses and LAE Prior years |  | 23,391 |  | 34,294
Total paid losses and LAE |  | 23,391 |  | 34,589
Balance at end of period, net of reinsurance recoverables |  | 398,654 |  | 373,042
Add: Reinsurance recoverables | [2] | 16,024 |  | 12,319
Balance at end of period |  | $ 414,678 | [1] | $ 385,361
[1] | Primarily comprises first lien primary case reserves of $353.2 million and $339.8 million at March 31, 2020 and December 31, 2019, respectively.
[2] | Related to ceded losses recoverable, if any, on reinsurance transactions. See Note 7 for additional information.
[3] | Related to underlying defaulted loans with a most recent default notice dated in the year indicated. For example, if a loan had defaulted in a prior year, but then subsequently cured and later re-defaulted in the current year, that default would be considered a current year default.

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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs. + 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 (c) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs. + 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 (c) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred and costs incurred in the claim settlement process. + 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 (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(13)(a)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 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 Reference 3: 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 + Details
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