Note 10 - Losses and Loss Adjustment Expense Reserve for Losses and LAE by Segment (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense (Note 10)		$ 398,141	$ 401,361
Mortgage Insurance Segment
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense (Note 10)		394,087	397,891	$ 408,980	$ 507,588
Mortgage and Real Estate Services Segment
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense (Note 10)	[1]	$ 4,054	$ 3,470

[1] The Services loss reserves relate to Radian Title Insurance and the majority is subject to reinsurance, with the related reinsurance recoverables reported in other assets in our condensed consolidated balance sheets. For all periods presented, total incurred losses and paid claims for Radian Title Insurance were not material. See Note 8 of Notes to Consolidated Financial Statements in our 2018 Form 10-K for additional information about our use of reinsurance in our title insurance business.