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Note 13 - Commitments and Contingencies - Legal Proceedings (Details)	3 Months Ended
	Mar. 31, 2021 matter
Unasserted Claim | Minimum
Loss Contingencies [Line Items]
Minimum Number of Pending or Threatened Matters That Could Affect Our Results	1
Insurance Claims | Total primary reserves
Loss Contingencies [Line Items]
Loss Contingency, Legal Actions Commencement, Period	2 years
Insurance Claims | Pool Insurance Mortgage Insurance Product
Loss Contingencies [Line Items]
Loss Contingency, Legal Actions Commencement, Period	3 years

X

- Definition

Under Our Master Insurance Policy Any Suit Or Action Arising From Any Right Of The Insured Under The Policy Must Be Commenced Within This Number Of Years After Such Right First Arose

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

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- Details

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