| Segment Reporting Disclosure [Text Block] |
Segment Reporting Our mortgage insurance and financial guaranty segments are strategic business units that are managed separately on an operating basis. We allocate corporate income and expenses to our mortgage insurance and financial guaranty segments based on either an allocated percentage of time spent or internally allocated capital. We allocate corporate cash and investments to our segments based on internally allocated capital. The results for each segment for each reporting period can cause significant volatility in allocated capital. Summarized financial information concerning our operating segments, as of and for the periods indicated, are as follows: | | | | | | | | | | | | | | | | | | Three Months Ended
June 30, | | Six Months Ended
June 30, | (In thousands) | 2012 | | 2011 | | 2012 | | 2011 | Mortgage Insurance | | | | | | | | Net premiums written—insurance | $ | 182,518 |
| | $ | 164,194 |
| | $ | 379,371 |
| | $ | 345,040 |
| Net premiums earned—insurance | $ | 170,763 |
| | $ | 164,325 |
| | $ | 344,214 |
| | $ | 350,459 |
| Net investment income | 17,608 |
| | 24,853 |
| | 35,619 |
| | 51,686 |
| Net gains on investments | 26,662 |
| | 27,425 |
| | 58,840 |
| | 45,187 |
| Net impairment losses recognized in earnings | — |
| | (11 | ) | | — |
| | (11 | ) | Change in fair value of derivative instruments | (52 | ) | | 258 |
| | (31 | ) | | (136 | ) | Net gains (losses) on other financial instruments | 42 |
| | (631 | ) | | (667 | ) | | 1,835 |
| Gain on sale of affiliate | — |
| | — |
| | — |
| | — |
| Other income | 1,304 |
| | 1,124 |
| | 2,648 |
| | 2,524 |
| Total revenues | 216,327 |
| | 217,343 |
| | 440,623 |
| | 451,544 |
| Provision for losses | 208,078 |
| | 269,992 |
| | 442,807 |
| | 683,965 |
| Change in reserve for premium deficiency | 559 |
| | (3,102 | ) | | 539 |
| | (4,485 | ) | Policy acquisition costs | 7,890 |
| | 8,601 |
| | 16,536 |
| | 18,817 |
| Other operating expenses | 31,272 |
| | 33,913 |
| | 67,537 |
| | 68,050 |
| Interest expense | 1,723 |
| | 146 |
| | 3,445 |
| | 9,935 |
| Total expenses | 249,522 |
| | 309,550 |
| | 530,864 |
| | 776,282 |
| Equity in net (loss) income of affiliates | — |
| | — |
| | — |
| | — |
| Pretax loss | (33,195 | ) | | (92,207 | ) | | (90,241 | ) | | (324,738 | ) | Income tax (benefit) provision | (10,209 | ) | | 5,374 |
| | (22,008 | ) | | 8,875 |
| Net loss | $ | (22,986 | ) | | $ | (97,581 | ) | | $ | (68,233 | ) | | $ | (333,613 | ) | Cash and investments | $ | 3,176,027 |
| | $ | 3,334,789 |
| | | | | Deferred policy acquisition costs | 44,240 |
| | 44,509 |
| | | | | Total assets | 3,388,524 |
| | 3,688,720 |
| | | | | Unearned premiums | 290,880 |
| | 191,737 |
| | | | | Reserve for losses and LAE | 3,155,343 |
| | 3,268,582 |
| | | | | VIE debt | 7,500 |
| | 56,239 |
| | | | | Derivative liabilities | — |
| | — |
| | | | | | | | | | | | | NIW (in millions) | $ | 8,335 |
| | $ | 2,280 |
| | $ | 14,800 |
| | $ | 4,866 |
|
| | | | | | | | | | | | | | | | | | Three Months Ended
June 30, | | Six Months Ended
June 30, | (In thousands) | 2012 | | 2011 | | 2012 | | 2011 | Financial Guaranty | | | | | | | | Net premiums written—insurance | $ | (586 | ) | | $ | (11,416 | ) | | $ | (119,761 | ) | | $ | (9,513 | ) | Net premiums earned—insurance | $ | 16,016 |
| | $ | 24,609 |
| | $ | 9,930 |
| | $ | 41,498 |
| Net investment income | 13,269 |
| | 18,970 |
| | 29,971 |
| | 34,377 |
| Net (losses) gains on investments | (243 | ) | | 16,811 |
| | 35,038 |
| | 36,484 |
| Net impairment losses recognized in earnings | — |
| | — |
| | — |
| | — |
| Change in fair value of derivative instruments | (33,072 | ) | | 188,468 |
| | (105,850 | ) | | 432,754 |
| Net (losses) gains on other financial instruments | (61,904 | ) | | 5,678 |
| | (79,047 | ) | | 78,463 |
| Gain on sale of affiliate | 7,708 |
| | — |
| | 7,708 |
| | — |
| Other income | 91 |
| | 72 |
| | 187 |
| | 120 |
| Total revenues | (58,135 | ) | | 254,608 |
| | (102,063 | ) | | 623,696 |
| Provision for losses | 2,790 |
| | (6,426 | ) | | 34,215 |
| | 6,974 |
| Change in reserve for premium deficiency | — |
| | — |
| | — |
| | — |
| Policy acquisition costs | 2,915 |
| | 5,786 |
| | 22,315 |
| | 9,701 |
| Other operating expenses | 8,921 |
| | 12,041 |
| | 22,810 |
| | 24,123 |
| Interest expense | 10,858 |
| | 15,933 |
| | 23,284 |
| | 23,168 |
| Total expenses | 25,484 |
| | 27,334 |
| | 102,624 |
| | 63,966 |
| Equity in net (loss) income of affiliates | (2 | ) | | — |
| | (13 | ) | | 65 |
| Pretax (loss) income | (83,621 | ) | | 227,274 |
| | (204,700 | ) | | 559,795 |
| Income tax provision (benefit) | 12,652 |
| | (7,422 | ) | | 15,558 |
| | (13,939 | ) | Net (loss) income | $ | (96,273 | ) | | $ | 234,696 |
| | $ | (220,258 | ) | | $ | 573,734 |
| Cash and investments | $ | 2,137,956 |
| | $ | 2,703,740 |
| | | | | Deferred policy acquisition costs | 55,146 |
| | 94,417 |
| | | | | Total assets | 2,643,006 |
| | 3,240,076 |
| | | | | Unearned premiums | 297,551 |
| | 438,076 |
| | | | | Reserve for losses and LAE | 94,937 |
| | 75,042 |
| | | | | VIE debt | 100,333 |
| | 337,501 |
| | | | | Derivative liabilities | 219,960 |
| | 313,708 |
| | | | |
A reconciliation of segment net (loss) income to consolidated net (loss) income is as follows: | | | | | | | | | | | | | | | | | | Three Months Ended
June 30, | | Six Months Ended
June 30, | (In thousands) | 2012 | | 2011 | | 2012 | | 2011 | Consolidated | | | | | | | | Net (loss) income: | | | | | | | | Mortgage Insurance | $ | (22,986 | ) | | $ | (97,581 | ) | | $ | (68,233 | ) | | $ | (333,613 | ) | Financial Guaranty | (96,273 | ) | | 234,696 |
| | (220,258 | ) | | 573,734 |
| Total | $ | (119,259 | ) | | $ | 137,115 |
| | $ | (288,491 | ) | | $ | 240,121 |
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