Note 10 - Losses and Loss Adjustment Expense Mortgage Insurance Reserve Assumptions (Details) - Mortgage Insurance Segment	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Default To Claim Rate Estimate, Gross, For New Defaults		9.00%
Primary Mortgage Product
Weighted Average Default To Claim Rate Assumption Net Of Denials Rescissions and Reinstatements	33.00%
Default To Claim Rate Estimate, Gross, For New Defaults	8.00%
Default To Claim Rate Estimate, Gross, For Pre-Foreclosure Stage Defaults	68.00%
Default To Claim Estimate, Gross, For Foreclosure Stage Defaults	72.00%