Note 8 - Losses and LAE Losses and LAE for Mortgage Insurance (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	$ 3,119,597	$ 3,310,902
Total Reserve for Losses and LAE [Member]
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	3,119,597	3,310,902
Mortgage Insurance Segment
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	3,046,706	3,247,900
Financial Guaranty Segment [Member]
Reserve for losses and loss adjustment expenses
Reserve for Losses and Loss Adjustment Expenses	$ 72,891	$ 63,002