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Note 2 - Investments (Tables)

9 Months Ended

Sep. 30, 2025

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

The Company’s available‑for‑sale investments are summarized as follows:

		Amortized				Gross				Gross				Allowance for
		Cost or				Unrealized				Unrealized				Credit				Fair
September 30, 2025		Cost				Gains				Losses				Losses				Value
		(in thousands)
Fixed maturities:
U.S. Governments		$	24,831			$	85			$	(279	)		$	—			$	24,637
U.S. States, Territories, and Political Subdivisions			19,789				104				(1,178	)			—				18,715
Special revenue excluding mortgage/asset-backed securities			19,292				36				(2,125	)			—				17,203
Corporate and other			601,329				10,080				(8,526	)			—				602,883
Mortgage/asset-backed securities			481,614				5,212				(8,897	)			—				477,929
Total available-for-sale investments		$	1,146,855			$	15,517			$	(21,005	)		$	—			$	1,141,367

		Amortized				Gross				Gross				Allowance for
		Cost or				Unrealized				Unrealized				Credit				Fair
December 31, 2024		Cost				Gains				Losses				Losses				Value
		(in thousands)
Fixed maturities:
U.S. Governments		$	33,449			$	6			$	(649	)		$	—			$	32,806
U.S. States, Territories, and Political Subdivisions			10,606				29				(857	)			—				9,778
Special revenue excluding mortgage/asset-backed securities			30,283				85				(3,734	)			—				26,634
Corporate and other			492,395				1,689				(18,349	)			(244	)			475,491
Mortgage/asset-backed securities			406,597				1,408				(13,668	)			—				394,337
Total available-for-sale investments		$	973,330			$	3,217			$	(37,257	)		$	(244	)		$	939,046

Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]

The aggregate fair value and gross unrealized losses of the Company’s investments aggregated by investment category and the length of time these individual securities have been in a continuous unrealized loss position as of September 30, 2025 and December 31, 2024, are as follows:

		Less Than 12 Months								More Than 12 Months								Total
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
September 30, 2025		Value				Losses				Value				Losses				Value				Losses
		(in thousands)
Fixed maturity securities:
U.S. Governments		$	1,600			$	(45	)		$	8,161			$	(234	)		$	9,761			$	(279	)
U.S. States, Territories, and Political Subdivisions			5,181				(541	)			9,342				(637	)			14,523				(1,178	)
Special revenue excluding mortgage/asset-backed securities			230				(7	)			14,939				(2,118	)			15,169				(2,125	)
Corporate and other			61,100				(1,392	)			143,594				(7,134	)			204,694				(8,526	)
Mortgage/asset-backed securities			35,994				(497	)			88,658				(8,400	)			124,652				(8,897	)
Total available-for-sale investments		$	104,105			$	(2,482	)		$	264,694			$	(18,523	)		$	368,799			$	(21,005	)

		Less Than 12 Months								More Than 12 Months								Total
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
December 31, 2024		Value				Losses				Value				Losses				Value				Losses
		(in thousands)
Fixed maturity securities:
U.S. Governments		$	16,507			$	(65	)		$	14,291			$	(584	)		$	30,798			$	(649	)
U.S. States, Territories, and Political Subdivisions			2,614				(419	)			5,076				(438	)			7,690				(857	)
Special revenue excluding mortgage/asset-backed securities			2,182				(426	)			21,733				(3,308	)			23,915				(3,734	)
Corporate and other			181,179				(4,996	)			176,531				(13,353	)			357,710				(18,349	)
Mortgage/asset-backed securities			152,287				(2,820	)			91,572				(10,848	)			243,859				(13,668	)
Total available-for-sale investments		$	354,769			$	(8,726	)		$	309,203			$	(28,531	)		$	663,972			$	(37,257	)

Investments Classified by Contractual Maturity Date [Table Text Block]

The amortized cost and fair value of fixed maturity securities at September 30, 2025, by contractual maturity, are shown below.

		Amortized				Fair
		Cost				Value
		(in thousands)
Due within one year		$	71,849			$	71,977
Due after one year through five years			260,401				260,035
Due after five years through ten years			226,631				228,747
Due after ten years			106,360				102,679
Mortgage and asset-backed securities			481,614				477,929
		$	1,146,855			$	1,141,367

Investment Income [Table Text Block]

Net investment income is summarized as follows:

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2025				2024				2025				2024
		(in thousands)								(in thousands)
Interest income		$	14,515			$	9,365			$	39,824			$	24,317
Dividend income			298				220				857				675
Investment expense			(241	)			(177	)			(667	)			(486	)
Net investment income		$	14,572			$	9,408			$	40,014			$	24,506

Gain (Loss) on Securities [Table Text Block]

The following table presents net realized and unrealized investment gains and losses:

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2025				2024				2025				2024
		(in thousands)								(in thousands)
Realized gains:
Gains on sales of fixed maturity securities		$	29			$	42			$	463			$	59
Gains on sales of equity securities			—				—				234				—
Total realized gains			29				42				697				59
Realized losses:
Losses on sales of fixed maturity securities			(25	)			(328	)			(783	)			(330	)
Losses on sales of equity securities			—				—				(235	)			(1,204	)
Total realized losses			(25	)			(328	)			(1,018	)			(1,534	)
Net realized investment gains (losses)			4				(286	)			(321	)			(1,475	)
Change in allowance for credit losses			—				327				244				—
Net unrealized gains on equity securities			2,862				2,434				6,190				7,052
Net unrealized gains (losses) on equity method investment			—				148				2,268				(118	)
Net unrealized gains on other investments			627				111				1,080				309
Net realized and unrealized gains on investments		$	3,493			$	2,734			$	9,461			$	5,768

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