Note 8 - Losses and LAE Losses and LAE for Mortgage Insurance (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	$ 2,919,073	$ 3,149,936
Mortgage Insurance Segment
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	2,894,500	3,083,608	3,230,938
Financial Guaranty Segment
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	$ 24,573	$ 66,328	$ 85,426