Note 14 - Statutory Information Risk To Capital Calculation (Details) (Radian Guaranty [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Radian Guaranty [Member]
Risk to Capital Line Items [Line Items]
Risk In Force	$ 29,713.4	[1]	$ 26,128.2	[1]
Statutory capital	1,326.1		1,317.8
Contingency reserve	291.4		23.0
Statutory Accounting Practice, Statutory Position	$ 1,617.5		$ 1,340.8
Risk-to-capital	18.4		19.5
Risk to Capital Ratio, Entity's Intended Maximum	20

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