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Note 6 - Investments Investments Trading Securities (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 9 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 | Sep. 30, 2014 Securities (Assets) | Dec. 31, 2013 Securities (Assets) | Sep. 30, 2014 US government and agency securities | Dec. 31, 2013 US government and agency securities | Sep. 30, 2014 State and municipal obligations | Dec. 31, 2013 State and municipal obligations | Sep. 30, 2014 Corporate bonds and notes | Dec. 31, 2013 Corporate bonds and notes | Sep. 30, 2014 RMBS | Dec. 31, 2013 RMBS | Sep. 30, 2014 CMBS | Dec. 31, 2013 CMBS | Sep. 30, 2014 Other ABS | Dec. 31, 2013 Other ABS | Sep. 30, 2014 Foreign government securities | Dec. 31, 2013 Foreign government securities | Sep. 30, 2014 Equity securities | Dec. 31, 2013 Equity securities | Sep. 30, 2014 Other investments | Dec. 31, 2013 Other investments | Sep. 30, 2014 Portugal, Ireland, Italy, Greece, Spain and Hungary Government Securities [Member] Foreign government securities | Dec. 31, 2013 Portugal, Ireland, Italy, Greece, Spain and Hungary Government Securities [Member] Foreign government securities | Sep. 30, 2014 Non European Countries Outside U.S. Under Economic Stress [Member] Foreign government securities | Dec. 31, 2013 Non European Countries Outside U.S. Under Economic Stress [Member] Foreign government securities | Aug. 31, 2013 2013 Freddie Mac Agreement [Member] Mortgage Insurance Segment | Sep. 30, 2014 2013 Freddie Mac Agreement [Member] Mortgage Insurance Segment Primary Mortgage Product [Member] First Lien Position [Member] | Dec. 31, 2013 2013 Freddie Mac Agreement [Member] Mortgage Insurance Segment Primary Mortgage Product [Member] First Lien Position [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Portfolio | $ 4,975,401,000 |  | $ 4,975,401,000 |  | $ 4,931,157,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Trading Securities | 2,479,496,000 |  | 2,479,496,000 |  | 3,117,429,000 |  |  | 249,102,000 | 393,815,000 | 605,255,000 | 595,070,000 | 881,362,000 | 1,024,574,000 | 221,820,000 | 487,239,000 | 272,281,000 | 288,895,000 | 136,802,000 | 195,816,000 | 23,744,000 | 40,657,000 | 88,397,000 | 90,604,000 | 733,000 | 759,000 |  |  |  |  |  |  |
Trading Securities, Unrealized Holding Gain | (7,663,000) | (12,666,000) | 107,865,000 | (169,107,000) |  | 87,400,000 | (140,900,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Investments Held as Collateral for Master Transaction Agreement, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 205,000,000 | $ 209,000,000 | $ 205,000,000

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- Definition Sum of the carrying amounts as of the balance sheet date of all investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(h)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph h -Article 7 + Details
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