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Note 14 - Selected Financial Information of Registrant Selected Financial Information of Registrant (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014
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Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Total assets | $ 6,813,855 us-gaap_Assets | [1] | $ 6,859,963 us-gaap_Assets | $ 5,528,985 us-gaap_Assets | [1]
Long-term debt | 1,218,972 us-gaap_LongTermDebt |  | 1,209,926 us-gaap_LongTermDebt |  |
Total liabilities | 4,537,961 us-gaap_Liabilities |  | 4,688,213 us-gaap_Liabilities |  |
Equity component of currently redeemable convertible senior notes | 68,982 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests |  | 74,690 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests |  |
Total stockholders' equity | 2,206,912 us-gaap_StockholdersEquity |  | 2,097,060 us-gaap_StockholdersEquity |  |
Total liabilities and stockholders' equity | 6,813,855 us-gaap_LiabilitiesAndStockholdersEquity |  | 6,859,963 us-gaap_LiabilitiesAndStockholdersEquity |  |
Parent Company |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Investments in subsidiaries, at equity in net assets | 2,960,604 us-gaap_InvestmentsInAndAdvancesToAffiliatesAmountOfEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 2,746,915 us-gaap_InvestmentsInAndAdvancesToAffiliatesAmountOfEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total assets | 3,870,760 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 3,759,275 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Long-term debt | 1,218,972 us-gaap_LongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 1,209,926 us-gaap_LongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total liabilities | 1,594,866 us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 1,587,525 us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Equity component of currently redeemable convertible senior notes | 68,982 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 74,690 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total stockholders' equity | 2,206,912 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 2,097,060 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total liabilities and stockholders' equity | $ 3,870,760 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | $ 3,759,275 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
[1] | Assets held for sale are not part of the Mortgage Insurance or Services segments.

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition Amount of Equity in net profit and loss for the period. Give totals for each group. If operations of any controlled companies are different in character from those of the company, group such affiliates (1) within divisions and (2) by type of activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph 2,6 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph Column C -Article 12 + Details
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