Note 9 - Losses and LAE Rescissions And Denials (Details) - Mortgage Insurance Segment - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Rescissions And Denials [Line Items]
Claim Rescissions And Denials, Net of Reinstatements	$ (2.9)	$ 53.5	$ (57.7)	$ 93.3
Decrease To Our Loss Reserves Due To Estimated Rescissions And Denials	87.0		87.0		$ 125.0
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	50.4		50.4		163.6
Gross Exposure Related to Denied Claims From Previous Twelve Months			50.6
Gross Exposure Related to Rescinded Policies Within Twenty Four Months			52.1
Net Exposure Related to Claim Curtailments Within Twenty Four Months			25.7
Accrued Liability For Premiums Expected To Be Refunded From Rescissions	3.2		3.2		9.0
Claims Denied in the Last Twelve Months [Member]
Rescissions And Denials [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	11.8		11.8
Curtailed Claim Payments in the Last Twenty Four Months [Member]
Rescissions And Denials [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	1.8		1.8
Policies Rescinded in the Last Twenty Four Months [Member]
Rescissions And Denials [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	0.3		0.3
Bank of America Settlement Agreement [Member]
Rescissions And Denials [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	$ 29.1		$ 29.1		$ 133.0
Loss Contingency, Settlement Agreement, Percentage of Subject Loans Not Held by Insureds or Are Non-GSE Investors	12.00%		12.00%