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Note 21 - Quarterly Financial Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
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Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Jun. 30, 2015 | Sep. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Net premiums earned—insurance | $ 226,443 |  | $ 227,433 |  | $ 237,437 |  | $ 224,595 |  | $ 224,293 |  | $ 217,827 |  | $ 203,646 |  | $ 198,762 |  |  |  | $ 915,908 |  | $ 844,528 |  | $ 781,420
Services revenue | 37,493 |  | 42,189 |  | 43,503 |  | 30,630 | [1] | 34,450 |  | 42,243 |  | 0 |  |  |  |  |  | 153,815 |  | 76,693 |  | 0
Net investment income | 22,833 |  | 22,091 |  | 19,285 |  | 17,328 |  | 16,531 |  | 17,143 |  | 16,663 |  | 15,318 |  |  |  | 81,537 |  | 65,655 |  | 68,121
Net gains (losses) on other financial instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 612 |  | (3,880) |  | (7,580)
Provision for losses | 56,805 |  | 64,192 |  | 32,560 |  | 45,028 |  | 82,867 |  | 48,942 |  | 64,648 |  | 49,626 |  |  |  | 198,585 |  | 246,083 |  | 562,747
Policy acquisition costs | 4,831 |  | 2,880 |  | 6,963 |  | 7,750 |  | 6,443 |  | 4,240 |  | 6,746 |  | 7,017 |  |  |  | 22,424 |  | 24,446 |  | 28,485
Policy Acquisition Amortization Expense And Other Operating Expenses | 59,570 |  | 65,082 |  | 67,731 |  | 53,774 |  | 85,800 |  | 51,225 |  | 60,751 |  | 54,507 |  |  |  | 246,157 |  | 252,283 |  |
Loss on induced conversion and debt extinguishment | 2,320 |  | 11 |  | 91,876 |  | 0 |  |  |  |  |  |  |  |  |  |  |  | 94,207 |  | 0 |  | 0
Direct cost of services | 22,241 |  | 24,949 |  | 23,520 |  | 19,253 |  | 19,709 |  | 23,896 |  | 0 |  | 0 |  |  |  | 89,963 |  | 43,605 |  | 0
Increase (Decrease) in Goodwill and Intangible Assets | 3,409 |  | 3,273 |  | 3,281 |  | 3,023 |  | 5,354 |  | 3,294 |  | 0 |  | 0 |  |  |  | 12,986 |  | 8,648 |  | 0
Income (Loss) from Continuing Operations Attributable to Parent | 74,528 |  | 70,091 |  | 45,193 |  | 91,727 |  | 878,026 | [2] | 132,031 | [2] | 103,537 | [2] | 145,980 | [2] |  |  | 281,539 |  | 1,259,574 | [2] | (141,851)
Loss from discontinued operations, net of tax | 0 | [3] | 0 | [3] | 4,855 | [3] | 530 | [3] | (449,691) | [3],[4] | 21,559 | [3],[4] | 71,296 | [3],[4] | 56,779 | [3],[4] |  |  | 5,385 | [3] | (300,057) | [3],[4] | (55,134)
Net income (loss) | $ 74,528 |  | $ 70,091 |  | $ 50,048 |  | $ 92,257 |  | $ 428,335 |  | $ 153,590 |  | $ 174,833 |  | $ 202,759 |  |  |  | $ 286,924 |  | $ 959,517 |  | $ (196,985)
Net (loss) income per share—diluted | $ 0.32 | [5],[6] | $ 0.29 | [5],[6] | $ 0.22 | [5],[6] | $ 0.39 | [5],[6] | $ 1.78 | [5],[6] | $ 0.67 | [5],[6] | $ 0.78 | [5],[6] | $ 0.94 | [5],[6] |  |  | $ 1.22 | [5],[6] | $ 4.16 | [5],[6] | $ (1.18)
Weighted-average number of common and common equivalent shares outstanding—diluted | 247,981 | [5] | 250,795 | [5] | 246,650 | [5] | 243,048 | [5] | 242,801 | [5] | 238,067 | [5] | 230,779 | [5] | 222,668 | [5] |  |  | 246,332 | [5] | 233,902 | [5] | 166,366
Net Cash Provided by (Used in) Operating Activities, Continuing Operations |  |  |  |  |  |  | $ 666 |  |  |  |  |  |  |  |  |  |  |  | $ 15,514 |  | $ (153,245) |  | $ (619,040)
Cash Provided by (Used in) Operating Activities, Discontinued Operations |  |  |  |  |  |  | (1,759) |  |  |  |  |  |  |  |  |  |  |  | (1,759) |  | 17,071 |  | (45,897)
Cash Provided by (Used in) Investing Activities, Discontinued Operations |  |  |  |  |  |  | (4,999) |  |  |  |  |  |  |  |  |  |  |  | 4,999 |  | 156,839 |  | 107,790
Cash and Cash Equivalents, Period Increase (Decrease) Including Discontinued Operations |  |  |  |  |  |  | 29,979 |  |  |  |  |  |  |  |  |  |  |  | (16,012) |  | (8,142) |  | 7,697
Net Cash Provided by (Used in) Discontinued Operations |  |  |  |  |  |  | 3,240 |  |  |  |  |  |  |  |  |  |  |  | (421) |  | 557 |  | (1,169)
Proceeds from sales of fixed-maturity investments available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,621 | $ 16,208 | 20,100 |  | 19,672 |  | 17,185
Payments to Acquire Available-for-sale Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (671,952) | 1,006,985 | 1,486,318 |  | 519,166 |  | 21,432
Net gains (losses) on investments and other financial instruments | $ (13,402) | [7] | $ 3,868 | [7] | $ 28,448 | [7] | 16,779 | [7] | $ 17,983 | [7] | $ (6,294) | [7] | $ 25,332 | [7] | $ 42,968 | [7] |  |  | 35,693 | [7],[8] | 79,989 | [7],[8] | (106,525)
Scenario, Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations |  |  |  |  |  |  | 80 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Provided by (Used in) Operating Activities, Discontinued Operations |  |  |  |  |  |  | (12,168) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Provided by (Used in) Investing Activities, Discontinued Operations |  |  |  |  |  |  | (9,514) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Period Increase (Decrease) Including Discontinued Operations |  |  |  |  |  |  | 23,499 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Cash Provided by (Used in) Discontinued Operations |  |  |  |  |  |  | (3,240) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of fixed-maturity investments available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,309 | 96,684 |  |  |  |  |
Payments to Acquire Available-for-sale Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (725,640) | $ 1,087,461 |  |  |  |  |
Parent Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net investment income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,917 |  | 9,515 |  | 4,300
Loss on induced conversion and debt extinguishment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94,207 |  | 0 |  | 0
Income (Loss) from Continuing Operations Attributable to Parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 286,720 |  | 977,544 |  | (196,985)
Loss from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 204 |  | (18,027) |  | 0
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 286,924 |  | 959,517 |  | (196,985)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (128,879) |  | (27,153) |  | 105,681
Cash Provided by (Used in) Operating Activities, Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | (18,027) |  | 0
Payments to Acquire Available-for-sale Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 39,667 |  | $ 0 |  | $ 0
Adjustments for Error Correction [Domain] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services revenue |  |  |  |  |  |  | $ 101 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Services revenue for the first quarter includes $101 thousand that had previously been included in other income.
[2] | This amount reflects a reversal of substantially all of our tax valuation allowance in the fourth quarter of 2014.
[3] | Radian completed the sale of Radian Asset Assurance to Assured on April 1, 2015, pursuant to the Radian Asset Assurance Stock Purchase Agreement dated as of December 22, 2014. Until the April 1, 2015 sale date, the operating results of Radian Asset Assurance were classified as discontinued operations for all periods presented in our consolidated statements of operations. See Note 3 for additional information.
[4] | Reflects a $468 million loss on reclassification of Radian Asset Assurance as assets held for sale in the fourth quarter of 2014.
[5] | Diluted net income per share and average shares outstanding per the accounting standard regarding earnings per share.
[6] | Diluted net income per share is computed independently for each period presented. Consequently, the sum of the quarters may not equal the total net income per share for the year. For all calculations, the determination of whether potential common shares are dilutive or anti-dilutive is based on net income from continuing operations.
[7] | The 2015 and 2014 amounts reflect primarily unrealized (losses) gains, respectively, on our trading securities.
[8] | The change in expected economic loss or recovery associated with our previously owned VIEs is included in adjusted pretax operating income above, although it represents amounts that are not included in net income. Therefore, for purposes of this reconciliation, net gains (losses) on investments and other financial instruments has been adjusted by income of $0.1 million and $0.6 million for the years ended December 31, 2014 and 2013, respectively, to reverse this item.

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- Definition Amount of increase (decrease) in cash and cash equivalents including discontinued operations. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References No definition available. + Details
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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. + References No definition available. + Details
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- Definition Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred and also includes the change in reserve for premium deficiency. The change in premium deficiency is the increase (decrease) in the present value of expected future paid losses and expenses for a particular product that exceeds the present value of expected future premiums and existing reserves for that product. + References No definition available. + Details
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