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Note 2 - Investments (Tables)

6 Months Ended

Jun. 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
June 30, 2025		Cost				Gains				Losses				Losses				Value
		(in thousands)
Fixed maturities:
U.S. Governments		$	20,635			$	51			$	(348	)		$	—			$	20,338
U.S. States, Territories, and Political Subdivisions			19,832				58				(1,518	)			—				18,372
Special revenue excluding mortgage/asset-backed securities			19,406				13				(2,446	)			—				16,973
Corporate and other			588,794				5,904				(11,863	)			—				582,835
Mortgage/asset-backed securities			482,070				3,298				(10,520	)			—				474,848
Total available-for-sale investments		$	1,130,737			$	9,324			$	(26,695	)		$	—			$	1,113,366

		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 June 30, 2025 and December 31, 2024, are as follows:

		Less Than 12 Months								More Than 12 Months								Total
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
June 30, 2025		Value				Losses				Value				Losses				Value				Losses
		(in thousands)
Fixed maturity securities:
U.S. Governments		$	7,152			$	(3	)		$	10,029			$	(345	)		$	17,181			$	(348	)
U.S. States, Territories, and Political Subdivisions			7,358				(1,099	)			8,069				(419	)			15,427				(1,518	)
Special revenue excluding mortgage/asset-backed securities			1,618				(99	)			14,481				(2,347	)			16,099				(2,446	)
Corporate and other			111,899				(3,475	)			143,214				(8,388	)			255,113				(11,863	)
Mortgage/asset-backed securities			102,968				(1,122	)			88,382				(9,398	)			191,350				(10,520	)
Total available-for-sale investments		$	230,995			$	(5,798	)		$	264,175			$	(20,897	)		$	495,170			$	(26,695	)

		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 June 30, 2025, by contractual maturity, are shown below.

		Amortized				Fair
		Cost				Value
		(in thousands)
Due within one year		$	69,498			$	69,428
Due after one year through five years			250,894				248,447
Due after five years through ten years			214,429				213,039
Due after ten years			113,846				107,604
Mortgage and asset-backed securities			482,070				474,848
		$	1,130,737			$	1,113,366

Investment Income [Table Text Block]

Net investment income is summarized as follows:

		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2025				2024				2025				2024
		(in thousands)								(in thousands)
Interest income		$	13,344			$	7,626			$	25,308			$	14,952
Dividend income			242				257				559				455
Investment income (expense)			(216	)			77				(426	)			(309	)
Net investment income		$	13,370			$	7,960			$	25,441			$	15,098

Gain (Loss) on Securities [Table Text Block]

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

		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2025				2024				2025				2024
		(in thousands)								(in thousands)
Realized gains:
Gains on sales of fixed maturity securities		$	409			$	18			$	434			$	18
Gains on sales of equity securities			218				—				234				—
Total realized gains			627				18				668				18
Realized losses:
Losses on sales of fixed maturity securities			(298	)			—				(758	)			(2	)
Losses on sales of equity securities			(225	)			—				(234	)			(1,204	)
Total realized losses			(523	)			—				(992	)			(1,206	)
Net realized investment gains (losses)			104				18				(324	)			(1,188	)
Change in allowance for credit losses			—				(327	)			244				(327	)
Net unrealized gains on equity securities			5,659				388				3,327				4,617
Net unrealized gains (losses) on equity method investment			2,286				(245	)			2,268				(266	)
Net unrealized gains on other investments			257				198				453				198
Net realized and unrealized gains on investments		$	8,306			$	32			$	5,968			$	3,034

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