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Note 3 - Investments - The Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Due within one year, Amortized Cost	$ 62,232
Due within one year, Fair Value	62,241
Due after one year through five years, Amortized Cost	267,553
Due after one year through five years, Fair Value	267,430
Due after five years through ten years, Amortized Cost	226,631
Due after five years through ten years, Fair Value	229,466
Due after ten years, Amortized Cost	113,073
Due after ten years, Fair Value	109,012
Mortgage and asset-backed securities, Amortized Cost	558,116
Mortgage and asset-backed securities, Fair Value	556,038
Amortized Cost	1,227,605	$ 973,330
Total, Fair Value	$ 1,224,187	$ 939,046

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