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Note 4 - Segment Reporting Revenue and Other Segment Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums Earned, Net |  | $ 301,486,000 |  | $ 281,185,000 | $ 299,166,000 | $ 263,512,000 | $ 261,682,000 | $ 258,431,000 | $ 251,344,000 | $ 242,550,000 | $ 1,145,349,000 |  | $ 1,014,007,000 |  | $ 932,773,000 |
Services Revenue, Net |  | 40,031,000 |  | 42,509,000 | 39,303,000 | 32,753,000 | 38,414,000 | 36,566,000 | 36,828,000 | 33,164,000 | 154,596,000 |  | 144,972,000 |  | 155,103,000 |
Net investment income (Note 6) |  | 41,432,000 |  | 42,756,000 | 43,761,000 | 43,847,000 | 42,051,000 | 38,995,000 | 37,473,000 | 33,956,000 | 171,796,000 |  | 152,475,000 |  | 127,248,000 |
Other income |  |  |  |  |  |  |  |  |  |  | 3,495,000 |  | 4,028,000 |  | 2,886,000 |
Add: Net gains (losses) on investments and other financial instruments |  | 4,257,000 |  | $ 13,009,000 | $ 12,540,000 | $ 21,913,000 | (11,705,000) | $ (4,480,000) | $ (7,404,000) | $ (18,887,000) | 51,719,000 |  | (42,476,000) |  | 3,621,000 |
Total revenues |  |  |  |  |  |  |  |  |  |  | 1,526,955,000 |  | 1,273,006,000 |  | 1,221,631,000 |
Interest expense |  |  |  |  |  |  |  |  |  |  | 56,310,000 |  | 61,490,000 |  | 62,761,000 |
Depreciation |  |  |  |  |  |  |  |  |  |  | 7,800,000 |  | 8,000,000.0 |  | 6,900,000 |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | 124,412,000 |  | 94,815,000 |  | 72,764,000 |
Accounts Receivable, after Allowance for Credit Loss |  | 93,630,000 |  |  |  |  | 78,652,000 |  |  |  | 93,630,000 |  | 78,652,000 |  |  |
Unbilled Contracts Receivable |  | 13,772,000 |  |  |  |  | 19,917,000 |  |  |  | 13,772,000 |  | 19,917,000 |  |  |
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums Earned, Net |  |  |  |  |  |  |  |  |  |  | 1,145,349,000 |  | 1,014,007,000 |  | 932,773,000 |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | 158,629,000 |  | 148,217,000 |  | 161,833,000 |
Net investment income (Note 6) |  |  |  |  |  |  |  |  |  |  | 171,796,000 |  | 152,475,000 |  | 127,248,000 |
Other income |  |  |  |  |  |  |  |  |  |  | 3,495,000 |  | 4,028,000 |  | 2,886,000 |
Add: Net gains (losses) on investments and other financial instruments |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Total revenues |  |  |  |  |  |  |  |  |  |  | 1,479,269,000 |  | 1,318,727,000 |  | 1,224,740,000 |
Interest expense |  |  |  |  |  |  |  |  |  |  | 56,310,000 |  | 61,490,000 |  | 62,761,000 |
Depreciation |  |  |  |  |  |  |  |  |  |  | 19,001,000 |  | 18,792,000 |  | 17,073,000 |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | 121,021,000 | [1] | 92,108,000 | [2] | 69,760,000 | [3]
Operating Segments | Depreciation Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | 1,800,000 |  | 600,000 |  | 300,000 |
Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums Earned, Net |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | (4,033,000) |  | (3,245,000) |  | (6,730,000) |
Net investment income (Note 6) |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Other income |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Add: Net gains (losses) on investments and other financial instruments |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Total revenues |  |  |  |  |  |  |  |  |  |  | (4,033,000) |  | (3,245,000) |  | (6,730,000) |
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums Earned, Net |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Net investment income (Note 6) |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Other income |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Add: Net gains (losses) on investments and other financial instruments |  |  |  |  |  |  |  |  |  |  | 51,719,000 |  | (42,476,000) |  | 3,621,000 |
Total revenues |  |  |  |  |  |  |  |  |  |  | 51,719,000 |  | (42,476,000) |  | 3,621,000 |
Mortgage Insurance Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums Earned, Net |  |  |  |  |  |  |  |  |  |  | 1,134,214,000 |  | 1,006,721,000 |  | 932,773,000 |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Net investment income (Note 6) |  |  |  |  |  |  |  |  |  |  | 171,116,000 |  | 152,102,000 |  | 127,248,000 |
Other income |  |  |  |  |  |  |  |  |  |  | 3,495,000 |  | 2,794,000 |  | 2,886,000 |
Add: Net gains (losses) on investments and other financial instruments |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Total revenues |  |  |  |  |  |  |  |  |  |  | 1,308,825,000 |  | 1,161,617,000 |  | 1,062,907,000 |
Interest expense |  |  |  |  |  |  |  |  |  |  | 56,310,000 |  | 43,685,000 |  | 45,016,000 |
Depreciation |  |  |  |  |  |  |  |  |  |  | 15,317,000 |  | 15,229,000 |  | 13,315,000 |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | 104,078,000 | [1] | 80,134,000 | [2] | 55,441,000 | [3]
Mortgage Insurance Segment | Depreciation Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | 1,600,000 |  | 500,000 |  | 200,000 |
Mortgage and Real Estate Services Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums Earned, Net |  |  |  |  |  |  |  |  |  |  | 11,135,000 |  | 7,286,000 |  | 0 |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | 158,629,000 |  | 148,217,000 |  | 161,833,000 |
Net investment income (Note 6) |  |  |  |  |  |  |  |  |  |  | 680,000 |  | 373,000 |  | 0 |
Other income |  |  |  |  |  |  |  |  |  |  | 0 |  | 1,234,000 |  | 0 |
Add: Net gains (losses) on investments and other financial instruments |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Total revenues |  |  |  |  |  |  |  |  |  |  | 170,444,000 |  | 157,110,000 |  | 161,833,000 |
Interest expense |  |  |  |  |  |  |  |  |  |  | 0 |  | 17,805,000 |  | 17,745,000 |
Depreciation |  |  |  |  |  |  |  |  |  |  | 3,684,000 |  | 3,563,000 |  | 3,758,000 |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | 16,943,000 | [1] | 11,974,000 | [2] | 14,319,000 | [3]
Bad debt expense |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss |  | 10,773,000 | [4] |  |  |  | 15,461,000 |  |  |  | 10,773,000 | [4] | 15,461,000 |  |  |
Unbilled Contracts Receivable |  | 13,772,000 | [4] |  |  |  | 19,917,000 |  |  |  | 13,772,000 | [4] | 19,917,000 |  |  |
Deferred Revenue |  | 1,784,000 | [4] |  |  |  | $ 3,204,000 |  |  |  | 1,784,000 | [4] | 3,204,000 |  |  |
Mortgage and Real Estate Services Segment | Held-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss |  | 10,500,000 |  |  |  |  |  |  |  |  | 10,500,000 |  |  |  |  |
Unbilled Contracts Receivable |  | $ 3,900,000 |  |  |  |  |  |  |  |  | 3,900,000 |  |  |  |  |
Mortgage and Real Estate Services Segment | Mortgage Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services Revenue, Net | [5] |  |  |  |  |  |  |  |  |  | 74,007,000 |  | 76,050,000 |  | 77,121,000 |
Mortgage and Real Estate Services Segment | Mortgage Services | Clayton Services LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services Revenue, Net | [5] |  |  |  |  |  |  |  |  |  | 48,400,000 |  | 50,800,000 |  | 46,100,000 |
Mortgage and Real Estate Services Segment | Real Estate Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | 64,945,000 |  | 60,059,000 |  | 54,649,000 |
Mortgage and Real Estate Services Segment | Title Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services Revenue, Net |  |  |  |  |  |  |  |  |  |  | 15,644,000 |  | 8,863,000 |  | 23,333,000 |
Mortgage and Real Estate Services Segment | Depreciation Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of corporate operating expenses (1) |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  | $ 100,000 |  | $ 100,000 |
[1] | Includes additional depreciation expense of $1.6 million, $0.2 million and $1.8 million allocated to Mortgage Insurance, Services and Reportable Segment Total, respectively.
[2] | Includes additional depreciation expense of $0.5 million, $0.1 million and $0.6 million allocated to Mortgage Insurance, Services and Reportable Segment Total, respectively.
[3] | Includes additional depreciation expense of $0.2 million, $0.1 million and $0.3 million allocated to Mortgage Insurance, Services and Reportable Segment Total, respectively.
[4] | Excludes $10.5 million and $3.9 million of accounts receivable and unbilled receivables, respectively, that are related to Clayton and classified as held-for-sale.
[5] | Includes $48.4 million, $50.8 million and $46.1 million for the years ended December 31, 2019, 2018 and 2017, respectively, related to Clayton, which was sold in January 2020.

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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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