Note 9 - Losses and LAE Rescissions And Denials (Details) (Mortgage Insurance Segment, USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2014 servicers percentagepoint		Jun. 30, 2013		Jun. 30, 2014 servicers percentagepoint		Jun. 30, 2013		Dec. 31, 2013
Rescissions And Denials [Line Items]
Decrease To Our Loss Reserves Due To Estimated Rescissions And Denials	$ 192				$ 192				$ 247
Increase To Our Loss Reserves Due To Estimated Future Reinstatements Of Previously Rescinded Policies And Denied Claims	272				272				283
Claims Rescissions and Denials [Abstract]
Claim rescissions	17.7		19.6		33.8		34.9
Claim denials	(6.2)		100.0		6.0		127.2
Total rescissions and denials	11.5	[1]	119.6	[1]	39.8	[1]	162.1	[1]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	269.1				269.1				281.9
Number of Servicers With Which the Entity is in Settlement Discussions With	1				1
Accrued Liability For Premiums Expected To Be Refunded From Rescissions	12.6				12.6				17.0
Percentage Point Change In Severity Used In Assumption Shift Analysis	1				1
First Lien Primary Claim Severity					28.00%
Impact To Loss Reserves Based On One Percentage Change In Primary Claim Severity	44				44
First Lien Pool Claim Severity					43.00%
Impact To Loss Reserves Based On One Percentage Change In Pool Claim Severity	2				2
Weighted Average Default To Claim Rate Assumption Net Of Denials And Rescissions					45.00%				47.00%
Impact To Loss Reserves Based On One Percentage Change in Default To Claim Rate	29				29
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	145.1				145.1
Gross Exposure Related to Denied Claims From Previous Twelve Months					202.3
Number of Months That the Gross Reinstatement Rate Used in Estimating Claim Liability Declines					12 months
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	6.5				6.5
Claim Curtailments [Member]
Claims Rescissions and Denials [Abstract]
Claim Curtailments, Gross					77.1
Policies Rescinded in the Last Twenty Four Months [Member]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	104.4				104.4
Gross Exposure Related to Rescinded Policies Within Twenty Four Months					$ 289.4
Number of Months That the Gross Reinstatement Rate Used in Estimating Claim Liability Declines					24 months
Maximum [Member] | Claims Denied in the Last Twelve Months [Member]
Claims Rescissions and Denials [Abstract]
Gross Reinstatement Percentage Assumption for Denied Claims	60.00%				60.00%
Maximum [Member] | Curtailed Claim Payments in the Last Twenty Four Months [Member]
Claims Rescissions and Denials [Abstract]
Gross Reinstatement Percentage Assumption on Claim Curtailments	30.00%				30.00%
Maximum [Member] | Policies Rescinded in the Last Twenty Four Months [Member]
Claims Rescissions and Denials [Abstract]
Gross Reinstatement Percentage Assumption on Rescinded Policies	20.00%				20.00%
Minimum [Member] | Claims Denied in the Last Twelve Months [Member]
Claims Rescissions and Denials [Abstract]
Gross Reinstatement Percentage Assumption for Denied Claims	0.00%				0.00%
Minimum [Member] | Policies Rescinded in the Last Twenty Four Months [Member]
Claims Rescissions and Denials [Abstract]
Gross Reinstatement Percentage Assumption on Rescinded Policies	0.00%				0.00%

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