Note 2 - Significant Accounting Policies Accounting Policy (Details) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2019 USD ($) group payment days $ / shares		Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Losses and LAE Mortgage Insurance [Abstract]
Number Of Payments Missed For Insured Loans | payment		2
Unbilled Contracts Receivable		$ 13,772			$ 19,917
Second-Lien Reserve for Premium Deficiency		$ 200			900
Period That the Policyholder Has to Challenge a Notice of Rescission | days		30
Investments [Abstract]
Number of Investment Categories | group		3
Maximum Maturity Duration for Short Term Investment Grouping		12 months
Property, Plant and Equipment, Net [Abstract]
Operating Lease, Liability	[1],[2]	$ 59,452
Operating Lease, Right-of-Use Asset	[4]	37,866	[2],[3]		$ 0
Operating Lease, Liability, Not Yet Commenced		$ 0
Minimum
Losses and LAE Mortgage Insurance [Abstract]
Number Of Payments Missed For Insured Loans | payment		2
Maximum
Losses and LAE Mortgage Insurance [Abstract]
Lessee, Operating Lease, Term of Contract		12 months
Computer Equipment | Minimum
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Useful Life		3 years
Furniture and Fixtures | Maximum
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Useful Life		7 years
Mortgage Insurance Segment
Losses and LAE Mortgage Insurance [Abstract]
Premium receivable for deferred monthly premiums		$ 17,400
Contractual deferred monthly premiums		$ 78,400
Percent of LTV at which HPA Must Be Canceled Automatically		0.78
Increase in Net Premium Earned		$ 32,900
Increase in Net Premiums Earned Per Share | $ / shares		$ 0.12
Number of Mortgage Insurance Product Categories | group		2
ASU 2016-02
Property, Plant and Equipment, Net [Abstract]
Operating Lease, Liability				$ 73,500
Operating Lease, Right-of-Use Asset				49,400
Adjustment for Unamortized Allowances and Incentives				$ 24,100

[1] Classified in other liabilities in our consolidated balance sheets.

[2] Operating lease right-of-use assets and liabilities of $2.6 million and $3.8 million, respectively, are classified as held for sale and are excluded from the amounts in this disclosure.

[3] Classified in other assets in our consolidated balance sheets. See Note 9.

[4] Represents right-of-use assets recognized as a result of our adoption, as of January 1, 2019, of the new accounting and disclosure requirements for leases of property, plant and equipment. See Note 2 for additional information. Right-of-use assets are shown less accumulated amortization of $8.5 million at December 31, 2019.