Segment Information - Summary of Segment Information Reconciled to Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Gross premiums earned													$ 765,512	$ 724,716	$ 577,044
Premiums ceded													(269,627)	(261,144)	(199,741)
Net premiums earned	$ 148,614	$ 122,156	$ 115,556	$ 109,559	$ 105,918	$ 106,972	$ 124,919	$ 125,763	$ 102,224	$ 94,232	$ 93,004	$ 87,843	495,885	463,572	377,303
Net income from investment portfolio													47,453	24,107	20,170
Policy fee income													4,704	4,279	3,995
Gain from remeasurement of contingent liabilities													0	3,117	0
Other													2,628	4,488	6,447
Total revenue	162,670	131,644	127,327	129,029	119,943	126,654	125,926	127,040	112,320	99,217	101,504	94,874	550,670	499,563	407,915
Expenses:
Losses and loss adjustment expenses	65,398	66,726	61,890	60,565	72,135	139,794	86,830	72,704	63,193	62,664	55,917	45,751	254,579	371,463	227,525
Amortization of deferred policy acquisition costs													86,214	100,669	86,963
Other policy acquisition expenses													4,712	4,308	6,951
Interest expense	2,822	2,827	2,667	2,801	2,839	2,813	1,515	601	657	1,664	2,000	2,079	11,117	7,768	6,400
Depreciation and amortization													5,722	4,779	2,184
Debt conversion expense													0	0	1,754
Loss on extinguishment of debt													177	0	0
Impairment loss													0	2,284	0
Stock-based compensation expense													9,348	15,107	13,754
Personnel and other operating expenses													61,328	61,603	51,151
Total expenses	108,510	111,556	107,061	105,893	117,200	190,256	137,486	123,039	109,782	105,721	96,407	84,772	433,020	567,981	396,682
(Loss) income before income taxes	$ 54,160	$ 20,088	$ 20,266	$ 23,136	$ 2,743	$ (63,602)	$ (11,560)	$ 4,001	$ 2,538	$ (6,504)	$ 5,097	$ 10,102	117,650	(68,418)	11,233
Premiums Written, Gross													898,622	726,019	674,389
Operating Segments [Member] | H C P C I Insurance Operations [Member]
Revenue:
Gross premiums earned													438,234	439,499	404,362
Premiums ceded													(168,128)	(162,112)	(140,902)
Net premiums earned													270,106	277,387	263,460
Net income from investment portfolio													17,253	1,641	8,130
Policy fee income													2,163	2,482	2,794
Gain from remeasurement of contingent liabilities														585
Other													15,530	25,155	6,356
Total revenue													305,052	307,250	280,740
Expenses:
Losses and loss adjustment expenses													118,367	204,549	147,198
Amortization of deferred policy acquisition costs													40,349	56,841	56,470
Other policy acquisition expenses													2,401	2,557	2,851
Interest expense														0	0
Depreciation and amortization													559	626	86
Debt conversion expense															0
Impairment loss														652
Stock-based compensation expense													1,718	3,879	3,553
Personnel and other operating expenses													35,063	44,752	20,647
Total expenses													198,457	313,856	230,805
(Loss) income before income taxes													106,595	(6,606)	49,935
Total revenue from non-affiliates													270,873	273,222	277,333
Premiums Written, Gross													535,070	377,860	426,910
Operating Segments [Member] | Real Estate Operations [Member]
Revenue:
Gross premiums earned													0	0	0
Premiums ceded													0	0	0
Net premiums earned													0	0	0
Net income from investment portfolio													1	0	0
Gain from sales of real estate investments													8,811
Policy fee income														0	0
Gain on involuntary conversion														13,402
Gain from remeasurement of contingent liabilities														0
Other													9,897	10,365	12,226
Total revenue													18,709	23,767	12,226
Expenses:
Losses and loss adjustment expenses													0	0	0
Amortization of deferred policy acquisition costs														0	0
Other policy acquisition expenses														0	0
Interest expense													720	892	1,202
Depreciation and amortization													1,610	2,501	2,319
Debt conversion expense															0
Loss on extinguishment of debt													(177)
Impairment loss														0
Stock-based compensation expense														0	0
Personnel and other operating expenses													6,054	4,884	4,424
Total expenses													8,561	8,277	7,945
(Loss) income before income taxes													10,148	15,490	4,281
Total revenue from non-affiliates													15,416	22,413	10,872
Operating Segments [Member] | Corporate and Other [Member]
Revenue:
Gross premiums earned													0	0	0
Premiums ceded													0	0	0
Net premiums earned													0	0	0
Net income from investment portfolio													8,112	2,736	6,613
Policy fee income														0	0
Gain from remeasurement of contingent liabilities														0
Other													2,250	3,752	1,794
Total revenue													10,362	6,488	8,407
Expenses:
Losses and loss adjustment expenses													0	0	0
Amortization of deferred policy acquisition costs														0	0
Other policy acquisition expenses														0	0
Interest expense													10,397	6,875	5,467
Depreciation and amortization													707	868	884
Debt conversion expense															1,754
Impairment loss														0
Stock-based compensation expense													4,703	7,716	6,821
Personnel and other operating expenses													6,061	6,548	6,308
Total expenses													21,868	22,007	21,234
(Loss) income before income taxes													(11,506)	(15,519)	(12,827)
Total revenue from non-affiliates													8,087	3,937	7,406
Operating Segments [Member] | TypTap Group [Member]
Revenue:
Gross premiums earned													348,310	298,215	175,907
Premiums ceded													(122,501)	(110,299)	(61,534)
Net premiums earned													225,809	187,916	114,373
Net income from investment portfolio													13,602	3,991	1,306
Policy fee income													2,541	1,797	1,201
Gain from remeasurement of contingent liabilities														2,532
Other													5,211	2,302	1,606
Total revenue													247,163	198,538	118,486
Expenses:
Losses and loss adjustment expenses													139,049	173,828	80,863
Amortization of deferred policy acquisition costs													45,865	43,828	30,493
Other policy acquisition expenses													2,311	1,905	4,100
Interest expense													1,722	883	113
Depreciation and amortization													4,097	3,185	1,336
Debt conversion expense															0
Impairment loss														1,632
Stock-based compensation expense													2,927	3,512	3,380
Personnel and other operating expenses													38,779	31,548	28,357
Total expenses													234,750	260,321	148,642
(Loss) income before income taxes													12,413	(61,783)	(30,156)
Total revenue from non-affiliates													263,215	207,728	119,703
Premiums Written, Gross													363,552	348,159	247,479
Intersegment Eliminations [Member]
Revenue:
Gross premiums earned													(21,032)	(12,998)	(3,225)
Premiums ceded													21,002	11,267	(2,695)
Net premiums earned													(30)	(1,731)	(530)
Net income from investment portfolio													8,485	15,739	4,121
Gain from sales of real estate investments													(8,811)
Policy fee income														0	0
Gain on involuntary conversion														(13,402)
Gain from remeasurement of contingent liabilities														0
Other													(30,260)	(37,086)	(15,535)
Total revenue													(30,616)	(36,480)	(11,944)
Expenses:
Losses and loss adjustment expenses													(2,837)	(6,914)	(536)
Amortization of deferred policy acquisition costs														0	0
Other policy acquisition expenses														(154)	0
Interest expense													(1,722)	(882)	(382)
Depreciation and amortization													(1,251)	(2,401)	(2,441)
Debt conversion expense															0
Loss on extinguishment of debt													177
Impairment loss														0
Stock-based compensation expense														0	0
Personnel and other operating expenses													(24,629)	(26,129)	(8,585)
Total expenses													(30,616)	(36,480)	(11,944)
(Loss) income before income taxes													$ 0	$ 0	$ 0