Segment Information - Summary of Segment Information Reconciled to Consolidated Statements of Income (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024		Mar. 31, 2023
Revenue:
Gross premiums earned		$ 256,644	[1]	$ 180,068	[2]
Premiums ceded		(68,106)		(70,509)
Net premiums earned		188,538		109,559
Net income from investment portfolio		16,702		17,095
Gain from sales of real estate investments				0
Policy fee income		1,019		1,090
Other		355		1,285
Total revenue		206,614		129,029
Expenses:
Losses and loss adjustment expenses		79,922		60,565
Amortization of deferred policy acquisition costs		20,931		21,484
Other policy acquisition expenses		1,208		1,236
Stock-based compensation expense		1,582		2,106
Interest expense		3,149		2,801
Depreciation and amortization		1,490		1,387
Loss on extinguishment of debt		0		(177)
Personnel and other operating expenses		20,902		16,314
Total expenses		129,184		105,893
Income (loss) before income taxes		77,430		23,136
Gross premiums written		254,986		199,854
Operating Segments [Member] | HCPCI Insurance Operations [Member]
Revenue:
Gross premiums earned		155,382	[1]	96,991	[2]
Premiums ceded		(43,326)		(40,195)
Net premiums earned		112,056		56,796
Net income from investment portfolio		8,228		2,954
Gain from sales of real estate investments				0
Policy fee income		504		563
Other		3,538		4,653
Total revenue		124,326		64,966
Expenses:
Losses and loss adjustment expenses		39,014		28,782
Amortization of deferred policy acquisition costs		10,136		9,621
Other policy acquisition expenses		579		655
Stock-based compensation expense		369		496
Interest expense		0		0
Depreciation and amortization		138		139
Loss on extinguishment of debt				0
Personnel and other operating expenses		11,748		9,919
Total expenses		61,984		49,612
Income (loss) before income taxes		62,342		15,354
Total revenue from non-affiliates		114,956	[3]	56,929	[4]
Gross premiums written		91,875		85,153
Operating Segments [Member] | TypTap Group [Member]
Revenue:
Gross premiums earned		103,748	[1]	87,612	[2]
Premiums ceded		(28,673)		(34,823)
Net premiums earned		75,075		52,789
Net income from investment portfolio		4,543		3,379
Gain from sales of real estate investments				0
Policy fee income		515		527
Other		1,495		1,643
Total revenue		81,628		58,338
Expenses:
Losses and loss adjustment expenses		40,553		33,056
Amortization of deferred policy acquisition costs		10,795		11,863
Other policy acquisition expenses		519		611
Stock-based compensation expense		701		829
Interest expense		1,500		431
Depreciation and amortization		1,088		956
Loss on extinguishment of debt				0
Personnel and other operating expenses		9,970		9,433
Total expenses		65,126		57,179
Income (loss) before income taxes		16,502		1,159
Total revenue from non-affiliates		88,083	[3]	61,286	[4]
Gross premiums written		143,624		114,701
Operating Segments [Member] | Reciprocal Exchange Operations [Member]
Revenue:
Gross premiums earned		3,625
Premiums ceded		(2,218)
Net premiums earned		1,407
Net income from investment portfolio		56
Policy fee income		0
Other		0
Total revenue		1,463
Expenses:
Losses and loss adjustment expenses		1,268
Amortization of deferred policy acquisition costs		0
Other policy acquisition expenses		546
Stock-based compensation expense		0
Interest expense		812
Depreciation and amortization		0
Personnel and other operating expenses		54
Total expenses		2,680
Income (loss) before income taxes		(1,217)
Total revenue from non-affiliates		1,916
Gross premiums written		19,487
Operating Segments [Member] | Real Estate Operations [Member]
Revenue:
Gross premiums earned		0	[1],[5]	0	[2],[6]
Premiums ceded		0	[5]	0	[6]
Net premiums earned		0	[5]	0	[6]
Net income from investment portfolio		0	[5]	0	[6]
Gain from sales of real estate investments	[6]			8,936
Policy fee income		0	[5]	0	[6]
Other		3,447	[5]	2,923	[6]
Total revenue		3,447	[5]	11,859	[6]
Expenses:
Losses and loss adjustment expenses		0	[5]	0	[6]
Amortization of deferred policy acquisition costs		0	[5]	0	[6]
Other policy acquisition expenses		0	[5]	0	[6]
Stock-based compensation expense		0	[5]	0	[6]
Interest expense		223	[5]	203	[6]
Depreciation and amortization		380	[5]	627	[6]
Loss on extinguishment of debt	[6]			177
Personnel and other operating expenses		1,434	[5]	1,554	[6]
Total expenses		2,037	[5]	2,561	[6]
Income (loss) before income taxes		1,410	[5]	9,298	[6]
Total revenue from non-affiliates		2,606	[3],[5]	11,051	[4],[6]
Operating Segments [Member] | Corporate and Other [Member]
Revenue:
Gross premiums earned		0	[1],[7]	0	[2],[8]
Premiums ceded		0	[7]	0	[8]
Net premiums earned		0	[7]	0	[8]
Net income from investment portfolio		4,694	[7]	1,900	[8]
Gain from sales of real estate investments	[8]			0
Policy fee income		0	[7]	0	[8]
Other		1,030	[7]	595	[8]
Total revenue		5,724	[7]	2,495	[8]
Expenses:
Losses and loss adjustment expenses		0	[7]	0	[8]
Amortization of deferred policy acquisition costs		0	[7]	0	[8]
Other policy acquisition expenses		0	[7]	0	[8]
Stock-based compensation expense		512	[7]	781	[8]
Interest expense		2,926	[7]	2,598	[8]
Depreciation and amortization		160	[7]	202	[8]
Loss on extinguishment of debt	[8]			0
Personnel and other operating expenses		3,733	[7]	1,589	[8]
Total expenses		7,331	[7]	5,170	[8]
Income (loss) before income taxes		(1,607)	[7]	(2,675)	[8]
Total revenue from non-affiliates		4,085	[3],[7]	1,926	[4],[8]
Intersegment Eliminations [Member]
Revenue:
Gross premiums earned		(6,111)	[1]	(4,535)	[2]
Premiums ceded		6,111		4,509
Net premiums earned		0		(26)
Net income from investment portfolio		(819)		8,862
Gain from sales of real estate investments				(8,936)
Policy fee income		0		0
Other		(9,155)		(8,529)
Total revenue		(9,974)		(8,629)
Expenses:
Losses and loss adjustment expenses		(913)		(1,273)
Amortization of deferred policy acquisition costs		0		0
Other policy acquisition expenses		(436)		(30)
Stock-based compensation expense		0		0
Interest expense		(2,312)		(431)
Depreciation and amortization		(276)		(537)
Loss on extinguishment of debt				(177)
Personnel and other operating expenses		(6,037)		(6,181)
Total expenses		(9,974)		(8,629)
Income (loss) before income taxes		$ 0		$ 0

[1] Gross premiums earned under HCPCI Insurance Operations consist of $149,271 from HCPCI and $6,111 from a reinsurance company.

[2] Gross premiums earned under HCPCI Insurance Operations consist of $92,456 from HCPCI and $4,535 from a reinsurance company.

[3] Represents amounts before reclassification of certain revenue and expenses to conform with an insurance company’s presentation.

[4] Represents amounts before reclassification of certain revenue and expenses to conform with an insurance company’s presentation.

[5] Other revenue under real estate primarily consisted of rental income from investment properties.

[6] Other revenue under real estate primarily consisted of rental income from investment properties.

[7] Other revenue under corporate and other primarily consisted of revenue from marina business and management fees for attorney-in-fact services.

[8] Other revenue under corporate and other primarily consisted of revenue from marina business.