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Segment Information - Summary of Financial Information by Reportable Segment (Detail) - Successor [Member] - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Revenues: |  |  |
Total revenues before expenses and reorganization items | $ 126,228 | $ 16,902 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (105,860) | 12,854 |
Total assets | 22,763,560 | 23,718,591 | $ 22,635,702
Net investment income | 81,559 | 60,821 |
Amortization of insurance intangible assets | 37,525 | 50,890 |
Interest expense | 31,572 | 30,430 |
Unaffiliated Customers [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 125,030 | 15,770 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (107,058) | 11,722 |
Equity Method Investee [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 1,198 | 1,132 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 1,198 | 1,132 |
Inter-segment Eliminations [Member] |  |  |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  | 0 |
Financial Guarantee [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 132,758 | 96,602 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (97,560) | 96,794 |
Financial Services [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (2,542) | (83,552) |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (3,190) | (84,301) |
Corporate, Non-Segment [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (3,586) | 3,890 |
Inter-segment Eliminations [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (402) | (38) |
Operating Segments [Member] | Financial Guarantee [Member] |  |  |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  | (1,623) |
Total assets | 22,388,190 | 23,045,239 |
Net investment income | 78,342 | 57,713 |
Amortization of insurance intangible assets | 37,525 | 50,890 |
Interest expense | 31,394 | 30,284 |
Operating Segments [Member] | Financial Guarantee [Member] | Unaffiliated Customers [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 131,850 | 97,374 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (97,337) | 98,417 |
Operating Segments [Member] | Financial Guarantee [Member] | Equity Method Investee [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 0 | 0 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 0 | 0 |
Operating Segments [Member] | Financial Guarantee [Member] | Inter-segment Eliminations [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 908 | (772) |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (223) |  |
Operating Segments [Member] | Financial Services [Member] |  |  |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  | (454) |
Total assets | 139,637 | 390,661 |
Net investment income | 154 | 203 |
Amortization of insurance intangible assets | 0 | 0 |
Interest expense | 178 | 146 |
Operating Segments [Member] | Financial Services [Member] | Unaffiliated Customers [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (1,706) | (83,214) |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (2,252) | (83,847) |
Operating Segments [Member] | Financial Services [Member] | Equity Method Investee [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 0 | 0 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 0 | 0 |
Operating Segments [Member] | Financial Services [Member] | Inter-segment Eliminations [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (836) | (338) |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (938) |  |
Inter-segment Eliminations [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 0 | 0 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 0 | 0 |
Total assets | (153,847) | 5,806 |
Net investment income | 0 | 0 |
Amortization of insurance intangible assets | 0 | 0 |
Interest expense | 0 | 0 |
Inter-segment Eliminations [Member] | Unaffiliated Customers [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 0 | 0 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 0 | 0 |
Inter-segment Eliminations [Member] | Equity Method Investee [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 0 | 0 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 0 | 0 |
Inter-segment Eliminations [Member] | Inter-segment Eliminations [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (402) | (38) |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 0 | 0 |
Inter-segment Eliminations [Member] | Corporate, Non-Segment [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 330 | 1,148 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 1,161 | 2,077 |
Corporate, Non-Segment [Member] |  |  |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (5,110) | 361 |
Total assets | 389,580 | 276,885 |
Net investment income | 3,063 | 2,905 |
Amortization of insurance intangible assets | 0 | 0 |
Corporate, Non-Segment [Member] | Unaffiliated Customers [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | (5,114) | 1,610 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (7,469) | (2,848) |
Corporate, Non-Segment [Member] | Equity Method Investee [Member] |  |  |
Revenues: |  |  |
Total revenues before expenses and reorganization items | 1,198 | 1,132 |
Pre-tax income (loss) from continuing operations: |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 1,198 | 1,132 |
Corporate, Non-Segment [Member] | Corporate, Non-Segment [Member] |  |  |
Pre-tax income (loss) from continuing operations: |  |  |
Interest expense | $ 0 | $ 0 |

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