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Note 2 - Investments - The Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Due within one year, Amortized Cost	$ 69,498
Due within one year, Fair Value	69,428
Due after one year through five years, Amortized Cost	250,894
Due after one year through five years, Fair Value	248,447
Due after five years through ten years, Amortized Cost	214,429
Due after five years through ten years, Fair Value	213,039
Due after ten years, Amortized Cost	113,846
Due after ten years, Fair Value	107,604
Mortgage and asset-backed securities, Amortized Cost	482,070
Mortgage and asset-backed securities, Fair Value	474,848
Amortized Cost	1,130,737	$ 973,330
Total, Fair Value	$ 1,113,366	$ 939,046

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