Discontinued Operations - Schedule of Results of Ops IIC and UPC (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
REVENUE:
Gross premiums written	$ 612,522	$ 647,805	$ 635,709
Change in gross unearned premiums	(35,738)	9,197	31,026
Gross premiums earned	648,260	638,608	604,683
Ceded premiums earned	(341,408)	(364,618)	(342,623)
Net premiums earned	306,852	273,990	262,060
Net investment income	22,206	20,795	8,300
Net realized investment gains	1,382	(124)	(6,789)
Net unrealized gains on equity securities	4,999	1,996	814
Other revenue	0	0	15
Total revenue	335,439	296,657	264,400
EXPENSES:
Losses and loss adjustment expenses	46,040	69,319	46,678
Policy acquisition costs	97,844	70,990	75,436
General and administrative expenses	40,463	44,756	37,559
Interest expense	10,815	11,996	10,875
Total expenses	195,162	197,061	170,548
Income before other income	140,277	99,596	93,852
Other loss	2,457	2,063	2,228
Provision (benefit) for income taxes	35,939	25,340	10,876
Discontinued Operations | Interboro Insurance
REVENUE:
Gross premiums written	13,120	39,704	34,334
Change in gross unearned premiums	(3,336)	(3,337)	(3,053)
Gross premiums earned	9,784	36,367	31,281
Ceded premiums earned	(2,528)	(10,044)	(11,457)
Net premiums earned	7,256	26,323	19,824
Net investment income	538	2,093	2,274
Net realized investment gains	(2)	(66)	(19)
Other revenue	16	62	64
Total revenue	7,808	28,412	22,143
EXPENSES:
Losses and loss adjustment expenses	3,179	18,738	16,183
Policy acquisition costs	1,906	8,336	7,910
General and administrative expenses	546	3,483	2,170
Total expenses	5,631	30,557	26,263
Income before other income	2,177	(2,145)	(4,120)
Other loss	0	0	11
Income (loss) before income taxes	2,177	(2,145)	(4,109)
Provision (benefit) for income taxes	540	(1,544)	(1,103)
Income (loss) from discontinued operations, net of tax	$ 1,637	$ (601)	(3,006)
Discontinued Operations | UPC Insurance
REVENUE:
Gross premiums written			(120,608)
Change in gross unearned premiums			198,154
Gross premiums earned			77,546
Ceded premiums earned			(48,203)
Net premiums earned			29,343
Net investment income			2,182
Net realized investment gains			1,343
Net unrealized gains on equity securities			2,080
Other revenue			2,717
Total revenue			37,665
EXPENSES:
Losses and loss adjustment expenses			36,898
Policy acquisition costs			(1,522)
General and administrative expenses			11,307
Interest expense			22
Total expenses			46,705
Income before other income			(9,040)
Other loss			(2,004)
Income (loss) before income taxes			(11,044)
Provision (benefit) for income taxes			(317)
Income (loss) from discontinued operations, net of tax			$ (10,727)