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Note 4 - Segment Reporting - Revenue (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Revenues |  | $ 375,234,000 | $ 380,338,000 | $ 1,068,756,000 | $ 1,138,931,000 |
Net gains (losses) on investments and other financial instruments |  | 17,652,000 | 13,009,000 | 42,901,000 | 47,462,000 |
Other Nonoperating Income |  | 0 | 0 | 247,000 | 0 |
Interest Income, Related Party |  | (1,500,000) |  | (4,000,000.0) |  |
Services Revenue, Net |  | 33,943,000 | 42,509,000 | 93,945,000 | 114,565,000 |
Radian Group Inc. |  |  |  |  |  |
Marketable Securities | $ 200,000,000 |  |  |  |  |
Radian Guaranty |  |  |  |  |  |
Surplus Note | $ 200,000,000 | 300,000,000.0 |  | 300,000,000.0 |  | $ 100,000,000.0
Related Party Transaction, Rate | 3.00% |  |  |  |  |
Mortgage segment |  |  |  |  |  |
Revenues |  | 320,013,000 | 317,646,000 | 922,040,000 | 956,660,000 |
Real Estate segment |  |  |  |  |  |
Revenues |  | 33,328,000 | 30,139,000 | 88,003,000 | 80,789,000 |
Accounts and notes receivable related to revenue service contracts |  | 28,900,000 |  | 28,900,000 |  | $ 10,800,000
Bad debt expense |  | 0 | 0 | 0 | 0 |
All Other activities segment |  |  |  |  |  |
Revenues |  | 5,858,000 | 19,812,000 | 19,984,000 | 55,170,000 |
Valuation services |  |  |  |  |  |
Services Revenue, Net |  | 11,881,000 | 14,772,000 | 31,519,000 | 40,836,000 |
Title services |  |  |  |  |  |
Services Revenue, Net |  | 9,081,000 | 4,590,000 | 25,445,000 | 11,189,000 |
Asset management services |  |  |  |  |  |
Services Revenue, Net |  | 8,453,000 | 6,567,000 | 21,791,000 | 19,300,000 |
Real estate agent services |  |  |  |  |  |
Services Revenue, Net |  | 614,000 | 335,000 | 1,364,000 | 407,000 |
Mortgage services |  |  |  |  |  |
Services Revenue, Net |  | 3,914,000 | 2,340,000 | 10,965,000 | 4,856,000 |
All Other services |  |  |  |  |  |
Services Revenue, Net |  | 0 | 13,905,000 | 2,861,000 | 37,977,000 |
Operating Segments |  |  |  |  |  |
Revenues |  | 353,341,000 | 347,785,000 | 1,010,043,000 | 1,037,449,000 |
Intersegment Eliminations |  |  |  |  |  |
Revenues |  | $ (1,617,000) | $ (268,000) | $ (4,419,000) | $ (1,150,000) |

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- Definition This concept represents the gains and losses on investments and other financial instruments for the period excluding the impact of changes in the present value of insurance claims and recoveries on insured credit derivatives and VIEs, based on the company's ongoing insurance loss monitoring, which are a component of segment expenses. Also includes other than temporarily impaired losses recognized in earnings. + References No definition available. + Details
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