Note 13 - Statutory Information Risk To Capital Calculation (Details) (Radian Guaranty [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Radian Guaranty [Member]
Risk to Capital Line Items [Line Items]
Risk to Capital Ratio, Entity's Intended Maximum	20
Risk In Force	$ 27,075.0	[1]	$ 26,128.2	[1]
Statutory surplus	1,305.5		1,317.8
Statutory contingency reserve	108.2		23.0
Statutory position	$ 1,413.7		$ 1,340.8
Risk-to-capital	19.2		19.5

[1] Excludes risk ceded through reinsurance contracts (to third parties and affiliates) and RIF on defaulted loans.