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Note 3 - Segment Reporting Schedule of Segment Reporting Information by Segment (Details) | 3 Months Ended
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Mar. 31, 2019 USD ($) segment | Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |  |  |
Number of Operating Segments | segment |  | 2 |  |
Net premiums written—insurance |  | $ 253,320,000 |  | $ 237,980,000
Net premiums earned—insurance |  | 263,512,000 |  | 242,550,000
Services revenue |  | 32,753,000 |  | 33,164,000
Net investment income |  | 43,847,000 |  | 33,956,000
Other income |  | 1,604,000 |  | 807,000
Policy acquisition costs |  | 5,893,000 |  | 7,117,000
Cost of services |  | 24,157,000 |  | 23,126,000
Other operating expenses before corporate allocations |  | 78,805,000 |  | 63,243,000
Restructuring and other exit costs |  | 0 |  | 551,000
Adjusted pretax operating income (loss) |  | 202,070,000 |  | 164,103,000
Net gains (losses) on investments and other financial instruments |  | 21,913,000 |  | (18,887,000)
Mortgage Insurance Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net premiums written—insurance | [1] | 251,586,000 |  | 237,980,000
(Increase) decrease in unearned premiums |  | 10,192,000 |  | 4,570,000
Net premiums earned—insurance |  | 261,778,000 |  | 242,550,000
Net investment income |  | 43,665,000 |  | 33,956,000
Other income |  | 1,196,000 |  | 807,000
Total | [2] | 306,639,000 |  | 277,313,000
Provision for losses |  | 20,844,000 |  | 37,391,000
Policy acquisition costs |  | 5,893,000 |  | 7,117,000
Other operating expenses before corporate allocations |  | 30,410,000 |  | 31,888,000
Total | [3] | 57,147,000 |  | 76,396,000
Adjusted pretax operating income (loss) before corporate allocations |  | 249,492,000 |  | 200,917,000
Allocation of corporate operating expenses |  | 25,625,000 |  | 18,577,000
Allocation of interest expense |  | 15,697,000 |  | 10,629,000
Adjusted pretax operating income (loss) | [4] | 208,170,000 |  | 171,711,000
Inter-segment expenses |  | 970,000 |  | 1,002,000
Mortgage and Real Estate Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Corporate Cash and Investments Allocated to Segments |  | 0 |  |
Net premiums earned—insurance | [5] | 1,734,000 |  | 0
Services revenue | [6] | 33,723,000 |  | 34,166,000
Net investment income | [5] | 182,000 |  | 0
Other income | [5] | 408,000 |  | 0
Total | [6] | 36,047,000 |  | 34,166,000
Provision for losses | [5] | (18,000) |  | 0
Cost of services |  | 24,559,000 |  | 23,270,000
Other operating expenses before corporate allocations |  | 13,435,000 |  | 10,744,000
Restructuring and other exit costs |  | 0 |  | 525,000
Total |  | 37,976,000 |  | 34,539,000
Adjusted pretax operating income (loss) before corporate allocations |  | (1,929,000) |  | (373,000)
Allocation of corporate operating expenses |  | 4,171,000 |  | 2,784,000
Allocation of interest expense |  | 0 | [7] | 4,451,000
Adjusted pretax operating income (loss) | [4] | (6,100,000) |  | (7,608,000)
Inter-segment revenues |  | $ 970,000 |  | $ 1,002,000
[1] | Net of ceded premiums written under our reinsurance programs. See Note 7 for additional information.
[2] | Excludes net gains on investments and other financial instruments of $21.9 million for the three months ended March 31, 2019, and net losses on investments and other financial instruments of $18.9 million for the three months ended March 31, 2018, not included in adjusted pretax operating income.
[3] | Includes inter-segment expenses as follows:
| Three Months Ended March 31,
(In thousands) | 2019 |  | 2018
Inter-segment expenses | $ | 970 |  |  | $ | 1,002 |
[4] | Includes inter-segment expenses and revenues as listed in the notes to the preceding tables.
[5] | Results from inclusion of the operations of EnTitle Direct, a national title insurance and settlement services company, acquired in March 2018.
[6] | Includes inter-segment revenues as follows:
| Three Months Ended March 31,
(In thousands) | 2019 |  | 2018
Inter-segment revenues | $ | 970 |  |  | $ | 1,002 |
[7] | Effective January 1, 2019, the Clayton Intercompany Note was repaid using proceeds from an additional capital contribution from Radian Group. As a result of the intercompany note repayment, the Services segment no longer incurs interest expense on the intercompany note.

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