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Note 7 - Reinsurance Reinsurance Transactions (Details) - Reinsurer Concentration Risk [Member] - Radian Guaranty [Member] $ in Thousands | 3 Months Ended | 12 Months Ended | 15 Months Ended | 24 Months Ended | 33 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2015 | Mar. 31, 2013 | Dec. 31, 2017 USD ($) | Dec. 31, 2015 | Dec. 31, 2012 transaction
Quota Share Reinsurance Transactions [Member] |  |  |  |  |  |  |
Ceded Credit Risk [Line Items] |  |  |  |  |  |  |
First Lien Primary Mortgage Insurance Risk In Force Ceded | $ 2,018,468 | $ 2,575,060 |  |  |  |  |
Ceded Premiums Written | 7,962 | 10,596 |  |  |  |  |
Ceded Premiums Earned | 11,325 | 14,786 |  |  |  |  |
Accrued Liabilities for Commissions, Expense and Taxes | 2,270 | 3,165 |  |  |  |  |
Fees and Commissions | $ 5,739 | 6,664 |  |  |  |  |
Number of Quota Share Reinsurance Agreements | transaction |  |  |  |  |  |  | 2
Ceded Insurance Commission Percentage | 30.00% |  | 35.00% |  |  |  |
Single Premium QSR Transaction [Member] |  |  |  |  |  |  |
Ceded Credit Risk [Line Items] |  |  |  |  |  |  |
First Lien Primary Mortgage Insurance Risk In Force Ceded | $ 3,308,057 | 0 |  |  |  |  |
Ceded Premiums Written | 197,593 | 0 |  |  |  |  |
Ceded Premiums Earned | 5,994 | 0 |  |  |  |  |
Accrued Liabilities for Commissions, Expense and Taxes | 50,932 | 0 |  |  |  |  |
Fees and Commissions | $ 3,032 | $ 0 |  |  |  |  |
Ceded Insurance Commission Percentage | 25.00% |  |  |  |  |  |
Percentage of NIW Able to be Ceded under QSA |  |  |  | 20.00% |  | 35.00% |
Scenario, Forecast [Member] | Single Premium QSR Transaction [Member] |  |  |  |  |  |  |
Ceded Credit Risk [Line Items] |  |  |  |  |  |  |
Ceded Premiums Written |  |  |  |  | $ 195,000 |  |
Percentage of NIW Able to be Ceded under QSA |  |  |  |  | 35.00% |  |
Maximum [Member] | Single Premium QSR Transaction [Member] |  |  |  |  |  |  |
Ceded Credit Risk [Line Items] |  |  |  |  |  |  |
Loss Ratio | 55.00% |  |  |  |  |  |

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- Definition First Lien Primary Mortgage Insurance Risk In Force Ceded + References No definition available. + Details
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- Definition This concept represents the number of quota share reinsurance agreements the company has entered into with third party reinsurance providers. + References No definition available. + Details
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- Definition The carrying amount for commissions, taxes and other expenses that were incurred but unpaid as of the balance sheet date. + 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 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of earned premiums ceded to other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.1) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b),(c)(2) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486662&loc=d3e27175-158546 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 + Details
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- Definition Amount of fees and commissions from financial services and banking activities and correspondent clearing. Includes fees from depositor accounts, credit cards, merchant discounts, and fiduciary and trust activities, guarantee fees, investment advisory, management, and administrative fees, transfer agent fees, and insurance commissions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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