Note 8 - Losses and LAE Losses and LAE for Mortgage Insurance (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Reserve for losses and loss adjustment expenses
Liability for Claims and Claims Adjustment Expense	$ 2,716,490		$ 3,149,936
Mortgage Insurance Segment
Reserve for losses and loss adjustment expenses
Liability for Claims and Claims Adjustment Expense, Property Casualty Liability	2,690,861		3,083,608	3,155,343
Financial Guaranty Segment
Reserve for losses and loss adjustment expenses
Liability for Claims and Claims Adjustment Expense, Financial Guarantee Insurance Contracts	25,629		66,328	94,937
Liability for Claims and Claims Adjustment Expense	$ 23,611	$ 22,469	$ 64,291	$ 92,645	$ 83,049	$ 60,550