Note 9 - Losses and LAE Rescissions And Denials (Details) - Mortgage Insurance Segment - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Claims Rescissions and Denials [Abstract]
Rescissions, Net of Reinstatements		$ 3.4	$ 7.6	$ 7.2	$ 14.0
Claim Denials, Net of Reinstatements		3.6	6.4	9.2	25.3
Rescissions and Claim Denials Related to Settlement Agreement, Net of Reinstatements		(47.1)	(2.5)	(71.2)	0.5
Claim Rescissions And Denials, Net of Reinstatements	[1]	(40.1)	$ 11.5	(54.8)	$ 39.8
Decrease To Our Loss Reserves Due To Estimated Rescissions And Denials		108.0		108.0		$ 125.0
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount		66.7		66.7		163.6
Gross Exposure Related to Denied Claims From Previous Twelve Months				65.1
Gross Exposure Related to Rescinded Policies Within Twenty Four Months				67.2
Net Exposure Related to Claim Curtailments Within Twenty Four Months				28.3
Accrued Liability For Premiums Expected To Be Refunded From Rescissions		8.1		8.1		9.0
Claims Denied in the Last Twelve Months [Member]
Claims Rescissions and Denials [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount		10.8		10.8
Curtailed Claim Payments in the Last Twenty Four Months [Member]
Claims Rescissions and Denials [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount		2.2		2.2
Policies Rescinded in the Last Twenty Four Months [Member]
Claims Rescissions and Denials [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount		0.6		0.6
Bank of America Settlement Agreement [Member]
Claims Rescissions and Denials [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount		$ 46.9		$ 46.9		$ 133.0
Loss Contingency, Settlement Agreement, Percentage of Subject Loans Not Held by Insureds or Are Non-GSE Investors		12.00%		12.00%

[1] Includes an amount related to a small number of submitted claims that were subsequently withdrawn by the insured.