Heritage Insurance (HRTG) 10-Q 8 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 02, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	Heritage Insurance Holdings, Inc.
Entity Central Index Key	0001598665
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		27,880,203
Entity File Number	001-36462
Entity Tax Identification Number	45-5338504
Entity Address, Address Line One	2600 McCormick Drive
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Clearwater
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33759
City Area Code	727
Local Phone Number	362-7200
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Title of each class	Common Stock, par value $0.0001 per share
Trading Symbol(s)	HRTG
Name of each exchange on which registered	NYSE

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Fixed maturities, available-for-sale, at fair value (amortized cost of $661,396 and $553,172)	$ 660,819	$ 561,011
Equity securities, at cost	1,415	1,599
Other investments	23,887	26,409
Total investments	686,121	589,019
Cash and cash equivalents	393,411	440,956
Restricted cash	5,415	5,427
Accrued investment income	3,042	2,737
Premiums receivable, net	74,877	77,471
Reinsurance recoverable on paid and unpaid claims, net of allowance for estimated uncollectible reinsurance of $45	346,374	355,037
Prepaid reinsurance premiums	338,172	245,818
Income taxes receivable	35,490	32,224
Deferred policy acquisition costs, net	95,425	89,265
Property and equipment, net	17,950	18,685
Right-of-use lease asset, net	28,652	6,461
Intangibles, net	57,514	62,277
Goodwill	152,459	152,459
Other assets	13,220	11,544
Total Assets	2,248,122	2,089,379
LIABILITIES AND STOCKHOLDERS' EQUITY
Unpaid losses and loss adjustment expenses	636,146	659,341
Unearned premiums	605,304	569,618
Reinsurance payable	324,730	161,918
Long-term debt, net	121,481	120,998
Deferred income tax liability, net	13,665	18,477
Advance premiums	33,341	18,268
Accrued compensation	9,430	9,325
Lease liability	31,964	8,155
Accounts payable and other liabilities	67,036	80,935
Total Liabilities	1,843,097	1,647,035
Commitments and contingencies (Note 17)
Stockholders’ Equity:
Common stock, $0.0001 par value, 50,000,000 shares authorized, 27,852,626 shares issued and 27,802,626 shares outstanding at September 30, 2021; 27,833,873 shares issued and 27,748,606 shares outstanding at December 31, 2020	3	3
Additional paid-in capital	332,562	331,867
Accumulated other comprehensive income	(405)	6,057
Treasury stock, at cost, 9,427,948 and 9,279,839 shares at September 30, 2021 and December 31, 2020	(116,370)	(115,365)
Retained earnings	189,235	219,782
Total Stockholders' Equity	405,025	442,344
Total Liabilities and Stockholders' Equity	$ 2,248,122	$ 2,089,379

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Fixed maturities, at amortized cost	$ 661,396	$ 553,172
Reinsurance recoverable net of allowance for estimated uncollectible reinsurance	$ 45	$ 45
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	27,852,626	27,833,873
Common stock, shares outstanding	27,802,626	27,748,606
Treasury stock, shares	9,427,948	9,279,839

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Other Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES:
Gross premiums written		$ 274,178	$ 278,242	$ 886,059	$ 797,776
Change in gross unearned premiums		20,231	(23,260)	(35,593)	(66,287)
Gross premiums earned		294,409	254,982	850,466	731,489
Ceded premiums		(131,964)	(116,752)	(399,323)	(338,197)
Net premiums earned		162,445	138,230	451,143	393,292
Net investment income		1,548	2,817	3,797	9,783
Net realized and unrealized (losses) gains		(6)	20,355	(926)	20,377
Other revenue		3,421	3,717	10,835	10,385
Total revenues		167,408	165,119	464,849	433,837
EXPENSES:
Losses and loss adjustment expenses		129,632	119,718	328,376	266,769
Policy acquisition costs, net of ceding commission income	[1]	35,984	31,960	109,183	92,243
General and administrative expenses, net of ceding commission income	[2]	17,169	17,923	52,490	59,583
Total expenses		182,785	169,601	490,049	418,595
Operating (loss) income		(15,377)	(4,482)	(25,200)	15,242
Interest expense, net		2,150	2,251	5,953	5,939
(Loss) income before income taxes		(17,527)	(6,733)	(31,153)	9,303
(Benefit) provision for income taxes		(1,117)	(1,500)	(5,644)	2,784
Net (loss) income		(16,410)	(5,233)	(25,509)	6,519
OTHER COMPREHENSIVE (LOSS) INCOME
Change in net unrealized (losses) gains on investments		(1,344)	2,480	(8,316)	19,330
Reclassification adjustment for net realized investment losses (gains)		6	(20,355)	(96)	(20,377)
Income tax benefit related to items of other comprehensive income		310	4,137	(1,950)	242
Total comprehensive (loss) income		$ (17,438)	$ (18,971)	$ (31,971)	$ 5,714
Weighted average shares outstanding
Basic		27,938,028	27,739,839	27,902,814	28,053,959
Diluted		27,938,028	27,739,839	27,902,814	28,073,570
(Loss) earnings per share
Basic		$ (0.59)	$ (0.19)	$ (0.91)	$ 0.23
Diluted		$ (0.59)	$ (0.19)	$ (0.91)	$ 0.23
[1]	Policy acquisition costs includes $ 12.0 million and $ 35.2 million of ceding commission income for the three and nine months ended September 30, 2021 and $ 10.6 million and $ 32.3 million for the three months and nine months ended September 30, 2020, respectively.
[2]	General and administration includes $ 4.0 million and $ 11.6 million of ceding commission income for the three and nine months ended September 30, 2021 and $ 3.5 million and $ 10.6 million for the three months and nine months ended September 30, 2020, respectively.

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Operations and Other Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Ceding commission income	$ 15,978	$ 14,129	$ 46,821	$ 42,950
Policy Acquisition Costs [Member]
Ceding commission income	12,000	10,600	35,200	32,300
General and Administrative Expenses [Member]
Ceding commission income	$ 4,000	$ 3,500	$ 11,600	$ 10,600

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member]	Common Stock [Member]Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member]Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Treasury Shares [Member]	Treasury Shares [Member]Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member]Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Beginning Balance at Dec. 31, 2019	$ 448,799		$ 448,765	$ 3	$ 3	$ 329,568	$ 329,568	$ 217,266		$ 217,232	$ (105,368)	$ (105,368)	$ 7,330	$ 7,330
Beginning Balance (ASU 2016-13 [Member]) at Dec. 31, 2019		$ (34)							$ (34)
Beginning Balance, Shares at Dec. 31, 2019				28,650,918	28,650,918
Net unrealized change in investments, net of tax	1,512												1,512
Shares tendered for income taxes withholding	(233)					(233)
Shares tendered for income taxes withholding, Shares				(17,500)
Restricted stock vested, Shares				25,000
Stock-based compensation on restricted stock	1,345					1,345
Stock buy-back	(7,986)										(7,986)
Stock buy-back, Shares				(766,900)
Cash dividends declared	(1,726)							(1,726)
Net (loss) income	7,620							7,620
Ending balance at Mar. 31, 2020	449,297			$ 3		330,680		223,126			(113,354)		8,842
Ending balance, Shares at Mar. 31, 2020				27,891,518
Beginning Balance at Dec. 31, 2019	448,799		448,765	$ 3	$ 3	329,568	329,568	217,266		217,232	(105,368)	(105,368)	7,330	7,330
Beginning Balance (ASU 2016-13 [Member]) at Dec. 31, 2019		(34)							(34)
Beginning Balance, Shares at Dec. 31, 2019				28,650,918	28,650,918
Net (loss) income	6,519
Ending balance at Sep. 30, 2020	443,140			$ 3		333,332		218,645			(115,365)		6,525
Ending balance, Shares at Sep. 30, 2020				27,748,606
Beginning Balance at Dec. 31, 2019	448,799		$ 448,765	$ 3	$ 3	329,568	$ 329,568	217,266		$ 217,232	(105,368)	$ (105,368)	7,330	$ 7,330
Beginning Balance (ASU 2016-13 [Member]) at Dec. 31, 2019		$ (34)							$ (34)
Beginning Balance, Shares at Dec. 31, 2019				28,650,918	28,650,918
Stock buy-back	$ (26,200)
Stock buy-back, Shares	(2,065,042)
Ending balance at Dec. 31, 2020	$ 442,344			$ 3		331,867		219,782			(115,365)		6,057
Ending balance, Shares at Dec. 31, 2020				27,748,606
Beginning Balance at Mar. 31, 2020	449,297			$ 3		330,680		223,126			(113,354)		8,842
Beginning Balance, Shares at Mar. 31, 2020				27,891,518
Net unrealized change in investments, net of tax	11,421												11,421
Deferred tax adjustment for credit expected losses	4							4
Restricted stock vested, Shares				10,000
Stock-based compensation on restricted stock	1,357					1,357
Stock buy-back	(2,011)										(2,011)
Stock buy-back, Shares				(163,456)
Cash dividends declared	(1,693)							(1,693)
Net (loss) income	4,132							4,132
Ending balance at Jun. 30, 2020	462,499			$ 3		332,037		225,561			(115,365)		20,263
Ending balance, Shares at Jun. 30, 2020				27,738,062
Net unrealized change in investments, net of tax	(13,738)												(13,738)
Shares tendered for income taxes withholding	(64)					(64)
Shares tendered for income taxes withholding, Shares				(4,723)
Restricted stock vested, Shares				10,267
Issued restricted stock, Shares				5,000
Stock-based compensation on restricted stock	1,359					1,359
Cash dividends declared	(1,683)							(1,683)
Net (loss) income	(5,233)							(5,233)
Ending balance at Sep. 30, 2020	443,140			$ 3		333,332		218,645			(115,365)		6,525
Ending balance, Shares at Sep. 30, 2020				27,748,606
Beginning Balance at Dec. 31, 2020	442,344			$ 3		331,867		219,782			(115,365)		6,057
Beginning Balance, Shares at Dec. 31, 2020				27,748,606
Net unrealized change in investments, net of tax	(8,202)												(8,202)
Shares tendered for income taxes withholding	(127)					(127)
Shares tendered for income taxes withholding, Shares				(12,500)
Restricted stock vested, Shares				25,000
Issued restricted stock, Shares				143,817
Stock-based compensation on restricted stock	260					260
Cash dividends declared	(1,679)							(1,679)
Net (loss) income	(5,148)							(5,148)
Ending balance at Mar. 31, 2021	427,448			$ 3		332,000		212,955			(115,365)		(2,145)
Ending balance, Shares at Mar. 31, 2021				27,904,923
Beginning Balance at Dec. 31, 2020	442,344			$ 3		331,867		219,782			(115,365)		6,057
Beginning Balance, Shares at Dec. 31, 2020				27,748,606
Stock buy-back	$ (1,000)
Stock buy-back, Shares	(148,109)
Net (loss) income	$ (25,509)
Ending balance at Sep. 30, 2021	405,025			$ 3		332,562		189,235			(116,370)		(405)
Ending balance, Shares at Sep. 30, 2021				27,802,626
Beginning Balance at Mar. 31, 2021	427,448			$ 3		332,000		212,955			(115,365)		(2,145)
Beginning Balance, Shares at Mar. 31, 2021				27,904,923
Net unrealized change in investments, net of tax	2,768												2,768
Issued restricted stock, Shares				42,018
Stock-based compensation on restricted stock	287					287
Cash dividends declared	(1,680)							(1,680)
Net (loss) income	(3,950)							(3,950)
Ending balance at Jun. 30, 2021	424,873			$ 3		332,287		207,325			(115,365)		623
Ending balance, Shares at Jun. 30, 2021				27,946,941
Net unrealized change in investments, net of tax	(1,028)												(1,028)
Shares tendered for income taxes withholding	(45)					(45)
Shares tendered for income taxes withholding, Shares				6,473
Restricted stock vested, Shares				10,267
Stock-based compensation on restricted stock	320					320
Stock buy-back	(1,005)										1,005
Stock buy-back, Shares				148,109
Cash dividends declared	(1,680)							1,680
Net (loss) income	(16,410)							(16,410)
Ending balance at Sep. 30, 2021	$ 405,025			$ 3		$ 332,562		$ 189,235			$ (116,370)		$ (405)
Ending balance, Shares at Sep. 30, 2021				27,802,626

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - Parenthetical - $ / shares	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Statement Of Stockholders Equity [Abstract]
Common stock, dividends, per share, declared	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES
Net (loss) income	$ (25,509)	$ 6,519
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Stock-based compensation	866	4,061
Bond amortization and accretion	3,018	4,247
Operating lease asset amortization	0	71
Amortization of original issuance discount on debt	1,454	1,056
Depreciation and amortization	6,345	6,078
Allowance for bad debt	106	0
Net loss from sale of asset	0	155
Net realized gains	(96)	(20,377)
Net change for unrealized losses in other investments	1,022	0
Deferred income taxes	(2,862)	67
Changes in operating assets and liabilities:
Accrued investment income	(305)	1,740
Premiums receivable	(2,488)	(6,353)
Prepaid reinsurance premiums	(92,354)	(83,895)
Reinsurance recoverable on paid and unpaid claims	8,663	4,703
Income taxes receivable	(3,266)	(13,079)
Deferred policy acquisition costs, net	(6,160)	(8,929)
Right-of-use leased asset, net	(22,192)	761
Other assets	(1,676)	451
Unpaid losses and loss adjustment expenses	(23,195)	49,464
Unearned premiums	35,686	66,407
Reinsurance payable	162,812	84,506
Accrued interest	(15)	787
Accrued compensation	105	6,270
Advance premiums	15,073	15,114
Operating lease liabilities	23,809
Other liabilities	(13,667)	(1,263)
Net cash provided by operating activities	70,150	118,561
INVESTING ACTIVITIES
Fixed maturity securities sales, maturities and paydowns	147,406	411,004
Fixed maturity securities purchases	(258,548)	(254,145)
Equity securities redemption	184	25
Paydowns on other investments	1,500	0
Limited partnership interest purchases	0	(20,400)
Equity securities purchases	0	(6)
Proceeds from sale of assets	45	792
Cost of property and equipment acquired	(892)	(628)
Net cash (used in) provided by investing activities	(110,305)	136,642
FINANCING ACTIVITIES
Principal payments on term loan facility	(3,750)	(7,500)
Proceeds from term loan facility	2,781	0
Mortgage loan payments	(228)	(215)
Purchase of treasury stock	(1,005)	(9,997)
Tax withholdings on share-based compensation awards	(171)	(297)
Dividends paid	(5,029)	(5,169)
Net cash used in financing activities	(7,402)	(23,178)
(Decrease) increase in cash, cash equivalents, and restricted cash	(47,557)	232,025
Cash, cash equivalents and restricted cash, beginning of period	446,383	283,008
Cash, cash equivalents and restricted cash, end of period	398,826	515,033
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Income taxes paid	489	16,252
Interest paid	$ 4,214	$ 4,794

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 393,411	$ 440,956
Restricted cash	5,415	5,427
Total	$ 398,826	$ 446,383	$ 515,033	$ 283,008

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation and Significant Accounting Policies	NOTE 1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The condensed consolidated financial statements include the accounts of Heritage Insurance Holdings, Inc. (together with its subsidiaries, the “Company”). These statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain financial information that is normally included in annual consolidated financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been omitted. In the opinion of the Company’s management, all material intercompany transactions and balances have been eliminated and all adjustments consisting of normal recurring accruals which are necessary for a fair statement of the financial condition and results of operations for the interim periods have been reflected. The accompanying interim condensed consolidated financial statements and related footnotes should be read in conjunction with the Company’s audited consolidated financial statements and related footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Form 10-K”) . Significant accounting policies The accounting policies of the Company are set forth in Note 1 to condensed consolidated financial statements contained in the Company’s 2020 Form 10-K. Reclassification Certain prior year amounts reported on the condensed consolidated balance sheet have been reclassified to conform to the current year presentation. Accounting Pronouncements not yet adopted The Company has documented the summary of its significant accounting policies in its Notes to the Audited Consolidated Financial Statements annual report on Form 10-K for the year ended December 31, 2020, filed on March 9, 2021. There have been no material changes to the Company’s accounting policies since the filing of that report. No other new accounting pronouncements issued but not yet effective have had, or are expected to have, a material impact on the Company’s results of operations or financial position.

Investments

Investments	9 Months Ended
	Sep. 30, 2021
Investments Debt And Equity Securities [Abstract]
Investments	NOTE 2. INVESTMENTS Securities Available-for-Sale The amortized cost, gross unrealized gains and losses, and fair value of the Company’s debt securities available-for-sale are as follows for the periods: September 30, 2021 Cost or Adjusted / Gross Unrealized Gross Unrealized Fair Value Debt Securities Available-for-sale (In thousands) U.S. government and agency securities (1) $ 43,734 $ 284 $ 9 $ 44,009 States, municipalities and political subdivisions 106,019 359 657 105,721 Special revenue 311,752 1,624 1,881 311,495 Hybrid securities 99 1 — 100 Industrial and miscellaneous 199,792 1,244 1,542 199,494 Total $ 661,396 $ 3,512 $ 4,089 $ 660,819 (1) Includes securities at September 30, 2021 with a carrying amount of $ 22.7 million that were pledged as collateral for the advance agreement entered into with a financial institution in 2018. The Company is permitted to withdraw or exchange any portion of the pledged collateral over the minimum requirement at any time. December 31, 2020 Cost or Adjusted / Gross Unrealized Gross Unrealized Fair Value Debt Securities Available-for-sale (In thousands) U.S. government and agency securities (1) $ 29,985 $ 609 $ 1 $ 30,593 States, municipalities and political subdivisions 84,597 1,077 4 85,670 Special revenue 271,194 3,154 27 274,321 Hybrid securities 100 — — 100 Industrial and miscellaneous 167,296 3,070 39 170,327 Total $ 553,172 $ 7,910 $ 71 $ 561,011 (1) Includes securities at December 31, 2020 with a carrying amount of $ 21.6 million that were pledged as collateral for the advance agreement entered into with a financial institution in 2018. The Company is permitted to withdraw or exchange any portion of the pledged collateral over the minimum requirement at any time. The following table presents net realized (losses) gains on the Company’s debt securities available-for-sale for the three and nine months ended September 30, 2021 and 2020, respectively : 2021 2020 Three Months Ended September 30, Gains Fair Value at Sale Gains Fair Value at Sale (In thousands) Debt Securities Available-for-Sale Total realized gains $ 2 $ 3,470 $ 20,355 $ 290,643 Total realized losses ( 8 ) 226 — — Net realized (losses) gains $ ( 6 ) $ 3,696 $ 20,355 $ 290,643 2021 2020 Nine Months Ended September 30, Gains Fair Value at Sale Gains Fair Value at Sale (In thousands) Debt Securities Available-for-Sale Total realized gains $ 106 $ 24,265 $ 20,492 $ 305,791 Total realized losses ( 10 ) 1,043 ( 115 ) 2,716 Net realized gains $ 96 $ 25,308 $ 20,377 $ 308,507 The table below summarizes the Company’s debt securities at September 30, 2021 by contractual maturity periods. Actual results may differ as issuers may have the right to call or prepay obligations, with or without penalties, prior to the contractual maturity of those obligations. At September 30, 2021 Cost or Amortized Cost Percent of Total Fair Value Percent of Total Maturity dates: (In thousands) (In thousands) Due in one year or less $ 44,447 7 % $ 44,628 7 % Due after one year through five years 253,398 38 % 254,377 38 % Due after five years through ten years 220,450 33 % 218,373 33 % Due after ten years 143,101 22 % 143,441 22 % Total $ 661,396 100 % $ 660,819 100 % The following table summarizes the Company’s net investment income by major investment category for the three and nine months ended September 30, 2021 and 2020, respectively: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) (In thousands) Debt securities $ 1,986 $ 2,170 $ 5,164 $ 8,567 Equity securities — — — — Cash and cash equivalents 17 651 72 1,610 Other investments 514 221 1,101 486 Net investment income 2,517 3,042 6,337 10,663 Less: Investment expenses 969 225 2,540 880 Net investment income, less investment expenses $ 1,548 $ 2,817 $ 3,797 $ 9,783 The following tables present, for all debt securities available-for-sale in an unrealized loss position (including securities pledged) and for which no credit loss allowance been established to date, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position at September 30, 2021 and December 31, 2020, respectively: Less Than Twelve Months Twelve Months or More September 30, 2021 Number of Gross Fair Value Number of Gross Fair Value Debt Securities Available-for-sale U.S. government and agency securities 10 $ 9 $ 14,441 — $ — $ — States, municipalities and political subdivisions 75 657 66,885 — — — Special revenue 188 1,877 150,757 11 4 101 Industrial and miscellaneous 133 1,542 99,327 — — — Total fixed maturity securities 406 $ 4,085 $ 331,410 11 $ 4 $ 101 Less Than Twelve Months Twelve Months or More December 31, 2020 Number of Gross Fair Value Number of Gross Fair Value Debt Securities Available-for-sale U.S. government and agency securities 3 $ 1 $ 73 1 $ — $ 7 States, municipalities and political subdivisions 6 4 5,158 — — — Special revenue 27 24 16,439 9 3 73 Industrial and miscellaneous 26 39 16,025 — — — Total fixed maturity securities 62 $ 68 $ 37,695 10 $ 3 $ 80 The Company’s unrealized losses on corporate bonds have not been recognized because the bonds are of high credit quality with investment grade ratings of A- or higher, the Company does not intend to sell and it is unlikely the Company will be required to sell the securities prior to their anticipated recovery, and the decline in fair value is not deemed to relate to credit but to changes in interest rates and other market conditions. The bond issuers continue to make timely principal and interest payments on the bonds. Based on the Company’s expected credit loss criteria and analysis results, the Company did no t record a credit allowance for securities that were in an unrealized loss position at September 30, 2021. There were neither any credit events nor credit allowances recorded at December 31, 2020. Other Investments Non-Consolidating Variable Interest Entities (“VIEs”) The Company makes passive investments in limited partnerships (“LPs”), limited liability companies (“LLCs”), and a Real Estate Investment Trust (“REIT”). These investments are accounted for using the equity method, with income reported in net realized and unrealized gains and losses or the measurement alternative method, which is reported at cost less impairment (if any), plus or minus changes from observable price changes. These investments are generally of a passive nature and the Company has determined it is not the primary beneficiary as it has no ability to direct activities that could significantly affect the economic performance of the investments. Investments in these entities are by nature less liquid and may involve more risk than other investments. In 2020, the Company entered into agreements for preferred units in the amounts of $ 7.5 million and $ 9.9 million. The preferred units are measured at amortized cost under the guidance of ASC 320 and are subject to a fixed principal and interest payment schedule with maturity dates of February 1, 2023 and April 1, 2024 , respectively. For the nine months ended September 30, 2021 and 2020, the Company received $ 937,000 and $ 353,000 in interest payments from the preferred units. As of September 30, 2021, the Company received in aggregate $ 1.2 million in fixed principal payments in relation to the $ 7.5 million preferred units agreement. There is no active market for these investments. The following table summarizes the carrying value and maximum loss exposure of the Company’s non-consolidated VIEs at September 30, 2021 and December 31, 2020: At September 30, 2021 At December 31, 2020 Carrying Value Maximum Loss Exposure Carrying Value Maximum Loss Exposure (in thousands) Investments in non-consolidated VIEs $ 23,887 $ 24,909 $ 26,409 $ 26,409 During the second quarter of 2021, the Company recorded on its condensed consolidated statement of operations in net realized and unrealized (losses) gains an impairment of approximately $ 1.0 million on its REIT investment. As of September 30, 2021, the carrying value of the REIT less the impairment is approximately $ 3.0 million. No agreements exist requiring the Company to provide additional funding to any of the non-consolidated VIEs in excess of the Company’s initial investment.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	NOTE 3. FAIR VALUE OF FINANCIAL MEASUREMENTS Fair value is determined based on the exchange price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. The Company is required to use an established hierarchy for fair value measurements based upon the inputs to the valuation and degree to which they are observable or not observable in the market. The three levels in the hierarchy are as follows:  Level 1 – Unadjusted quoted prices are available in active markets for identical assets/liabilities as of the reporting date.  Level 2 – Valuations based on observable inputs, such as quoted prices for similar assets or liabilities at the measurement date; quoted prices in the markets that are not active; or other inputs that are observable, either directly or indirectly.  Level 3 – Pricing inputs are unobservable and significant to the overall fair value measurement, and the determination of fair value requires significant management judgment or estimation. The highest priority is assigned to Level 1 inputs and the lowest priority to Level 3 inputs. The Company did not hold any Level 3 assets or liabilities as of September 30, 2021 or December 31, 2020. The following tables present information about the Company’s assets measured at fair value on a recurring basis. The Company assesses the levels for the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Company’s accounting policy regarding the recognitions of transfers between levels of the fair value hierarchy. The tables below present the balances of the Company’s invested assets measured at fair value on a recurring basis: September 30, 2021 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Invested Assets: (in thousands) Debt Securities Available-for-sale U.S. government and agency securities $ 44,009 $ 366 $ 43,643 $ — States, municipalities and political subdivisions 105,721 — 105,721 — Special revenue 311,495 — 311,495 — Hybrid securities 100 — 100 — Industrial and miscellaneous 199,494 — 199,494 — Total investments $ 660,819 $ 366 $ 660,453 $ — December 31, 2020 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Invested Assets: (in thousands) Debt Securities Available-for-sale U.S. government and agency securities $ 30,593 $ 371 $ 30,222 $ — States, municipalities and political subdivisions 85,670 — 85,670 — Special revenue 274,321 — 274,321 — Hybrid securities 100 — 100 — Industrial and miscellaneous 170,327 — 170,327 — Total investments $ 561,011 $ 371 $ 560,640 $ — Financial Instruments excluded from the fair value hierarchy The carrying value of premium receivables and accounts payable, accrued expense, revolving loans and borrowings under the Company’s senior secured credit facility approximate their fair value. The rate at which revolving loans and borrowings under the Company’s senior secured credit facility bear interest resets periodically at market interest rates. Non-recurring fair value measurements Assets and liabilities that are measured at fair value on a non-recurring basis include intangible assets and goodwill which are recognized at fair value during the period in which an acquisition is completed, from updated estimates and assumptions during the measurement period, or when they are considered to be impaired. These non-recurring fair value measurements, primarily for intangible assets acquired, were based on Level 3 unobservable inputs. For the quarters ended September 30, 2021 and 2020, these non-recurring fair values inputs consisted of brand, agent relationships, renewal rights, customer relations, trade names, non-compete and goodwill. To evaluate such assets for a potential impairment, the Company determines the fair value of the goodwill and intangible assets using a combination of a discounted cash flow approach and market approaches, which contain significant unobservable inputs and therefore are considered a Level 3 fair value measurement. The unobservable inputs in the analysis generally include future cash flow projections and a discount rate. There were no non-recurring fair value adjustments to intangible assets and goodwill during the third quarters of 2021 and 2020. The Company records any measurement period adjustments to the fair value of assets acquired and liabilities assumed, with the corresponding offset to goodwill.

Other Comprehensive (Loss) Inco

Other Comprehensive (Loss) Income	9 Months Ended
	Sep. 30, 2021
Comprehensive Income Net Of Tax [Abstract]
Other Comprehensive (Loss) Income	NOTE 4. OTHER COMPREHENSIVE (LOSS) INCOME The following table is a summary of other comprehensive (loss) income and discloses the tax impact of each component of other comprehensive (loss) income for the three and nine months ended September 30, 2021 and 2020, respectively: For the Three Months Ended September 30, 2021 2020 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive (loss) income Change in unrealized (losses) gains on investments, net $ ( 1,344 ) $ 311 $ ( 1,033 ) $ 2,480 $ ( 574 ) $ 1,906 Reclassification adjustment of realized losses (gains) included in net income 6 ( 1 ) 5 ( 20,355 ) 4,711 ( 15,644 ) Effect on other comprehensive (loss) income $ ( 1,338 ) $ 310 $ ( 1,028 ) $ ( 17,875 ) $ 4,137 $ ( 13,738 ) For the Nine Months Ended September 30, 2021 2020 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive (loss) income Change in unrealized (losses) gains on investments, net $ ( 8,316 ) $ 1,928 $ ( 6,388 ) $ 19,330 $ ( 4,471 ) $ 14,859 Reclassification adjustment of realized gains included in net income ( 96 ) 22 ( 74 ) ( 20,377 ) 4,713 ( 15,664 ) Effect on other comprehensive (loss) income $ ( 8,412 ) $ 1,950 $ ( 6,462 ) $ ( 1,047 ) $ 242 $ ( 805 )

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	NOTE 5. LEASES The Company has entered into operating and financing leases primarily for real estate and vehicles. The Company will determine whether an arrangement is a lease at inception of the agreement. The operating leases have terms of one to ten years , and often include one or more options to renew . These renewal terms can extend the lease term from two to ten years , and are included in the lease term when it is reasonably certain that the Company will exercise the option. The Company considers these options in determining the lease term used in establishing the Company’s right-of-use assets and lease obligations. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. Because the rate implicit in each operating lease is not readily determinable, the Company uses its incremental borrowing rate to determine present value of the lease payments. The Company used the implicit rates within the finance leases. Components of the Company’s lease costs for the three and nine months ended September 30, 2021 and 2020 were as follows (in thousands): Three Months Ended Three Months Ended Amortization of ROU assets - Finance leases $ 647 $ 21 Interest on lease liabilities - Finance leases 263 5 Variable lease cost (cost excluded from lease payments) 112 128 Operating lease cost (cost resulting from lease payments) 339 340 Total lease cost $ 1,361 $ 494 Nine Months Ended Nine Months Ended Amortization of ROU assets - Finance leases $ 1,321 $ 64 Interest on lease liabilities - Finance leases 524 16 Variable lease cost (cost excluded from lease payments) 373 391 Operating lease cost (cost resulting from lease payments) 1,018 1,023 Total lease cost $ 3,236 $ 1,494 Supplemental cash flow information and non-cash activity related to the Company’s operating and financing leases were as follows (in thousands): At September 30, 2021 At September 30, 2020 Finance lease - Operating cash flows $ 31 $ 16 Finance lease - Financing cash flows $ 100 $ 55 Operating lease - Operating cash flows (fixed payments) $ 1,123 $ 1,080 Operating lease - Operating cash flows (liability reduction) $ 840 $ 761 Supplemental balance sheet information related to the Company’s operating and financing leases as of September 30, 2021 were as follows (in thousands): Balance Sheet September 30, 2021 Right-of-use lease assets - operating Right-of-use lease asset, net $ 5,286 Right-of-use lease assets - finance Right-of-use lease asset, net $ 23,366 Lease liability - operating Lease liability $ 6,844 Lease liability - finance Lease liability $ 25,120 Weighted-average remaining lease term and discount rate for the Company’s operating and financing leases as of September 30, 2021 were as follows: September 30, 2021 Weighted average lease term - Finance leases 9.34 yrs. Weighted average lease term - Operating leases 6.40 yrs. Weighted average discount rate - Finance leases 4.2 % Weighted average discount rate - Operating leases 5.3 % Maturities of lease liabilities by fiscal year for the Company’s operating and financing leases were as follows (in thousands): September 30, 2021 2021 remaining $ 1,142 2022 4,566 2023 4,500 2024 4,194 2025 3,970 Thereafter 20,213 Total lease payments 38,585 Less: imputed interest ( 6,621 ) Present value of lease liabilities $ 31,964

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2021
Property Plant And Equipment [Abstract]
Property and Equipment, Net	NOTE 6. PROPERTY AND EQUIPMENT, NET Property and equipment, net consisted of the following at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (In thousands) Land $ 2,582 $ 2,582 Building 10,141 10,141 Computer hardware and software 7,147 6,358 Office furniture and equipment 2,038 2,027 Tenant and leasehold improvements 8,225 8,133 Vehicle fleet 720 850 Total, at cost 30,853 30,091 Less: accumulated depreciation and amortization ( 12,903 ) ( 11,406 ) Property and equipment, net $ 17,950 $ 18,685 Depreciation and amortization expense for property and equipment was approximately $ 736,000 and $ 442,000 for the three months ended September 30, 2021 and 2020, respectively and $ 1.6 million and $ 1.3 million for the nine months ended September 30, 2021 and 2020, respectively. The Company’s real estate consists of 15 acres of land and 5 buildings with a gross area of 191,200 square feet and a parking garage. Approximately 75 % of the building in Clearwater is leased to unaffiliated tenants. Following the Company’s planned relocation to its new Tampa headquarters, which is expected to occur in late 2021, the Company intends to sublease the remaining available space at the Clearwater location to unaffiliated tenants.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 7. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets At September 30, 2021 and December 31, 2020, goodwill was $ 152.5 million and intangible assets were $ 57.5 million and $ 62.3 million, respectively. The Company has determined the useful life of the other intangible assets to range between 2.5 - 15 years . Intangible assets include $ 1.3 million relating to insurance licenses which is classified as an indefinite lived intangible and is subject to annual impairment testing concurrent with goodwill. Goodwill (in thousands) Balance as of December 31, 2020 $ 152,459 Goodwill acquired — Impairment — Balance as of September 30, 2021 $ 152,459 Other Intangible Assets The Company’s intangible assets consist of brand, agent relationships, renewal rights, customer relations, trade names, non-competes and insurance licenses. Amortization expense of the Company’s intangible assets for the respective three month periods ended September 30, 2021 and 2020 was $ 1.6 million and for the respective nine month periods ended September 30, 2021 and 2020 was $ 4.8 million. No impairment in the value of amortizing or non-amortizing intangible assets was recognized during the nine months ended September 30, 2021 or 2020. Estimated annual pretax amortization of intangible assets for each of the next five years and thereafter is as follows (in thousands): Year Amount (1) 2021 - remaining $ 1,588 2022 $ 6,351 2023 $ 6,351 2024 $ 6,351 2025 $ 6,315 Thereafter $ 29,243 Total $ 56,199 (1) Excludes insurance licenses valued at $ 1.3 million and classified as an indefinite lived intangible which is subject to annual impairment testing and not amortized.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 8. EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per share (“EPS”) for the periods indicated. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Basic (loss) earnings per share: Net (loss) income attributable to common stockholders (000's) $ ( 16,410 ) $ ( 5,233 ) $ ( 25,509 ) $ 6,519 Weighted average shares outstanding 27,938,028 27,739,839 27,902,814 28,053,959 Basic (loss) earnings per share: $ ( 0.59 ) $ ( 0.19 ) $ ( 0.91 ) $ 0.23 Diluted (loss) earnings per share: Net (loss) income attributable to common stockholders (000's) $ ( 16,410 ) $ ( 5,233 ) $ ( 25,509 ) $ 6,519 Weighted average shares outstanding 27,938,028 27,739,839 27,902,814 28,053,959 Weighted average dilutive shares — — — 19,611 Total weighted average dilutive shares 27,938,028 27,739,839 27,902,814 28,073,570 Diluted (loss) earnings per share: $ ( 0.59 ) $ ( 0.19 ) $ ( 0.91 ) $ 0.23 Due to the net loss for the three and nine months ended September 30, 2021, the number of dilutive shares is the same as the number of basic shares due to the antidilutive impact of the convertible debt and restricted stock under the if-converted method. The convertible notes were excluded from the computations because the conversion price on these notes was greater than the average market price of the Company’s common shares during each of the respective periods, and therefore, would be anti-dilutive to earnings per share under the treasury method. The Company had 2,677,355 and 1,819,503 antidilutive shares as of September 30, 2021 and 2020, respectively.

Deferred Reinsurance Ceding Com

Deferred Reinsurance Ceding Commission	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Deferred Reinsurance Ceding Commission	NOTE 9. DEFERRED REINSURANCE CEDING COMMISSION The Company defers reinsurance ceding commission income, which is amortized over the effective period of the related insurance policies. For the three months ended September 30, 2021 and 2020, the Company allocated ceding commission income of $ 12.0 million and $ 10.6 million to policy acquisition costs and $ 4.0 million and $ 3.5 million to general and administrative expense, respectively. For the nine months ended September 30, 2021 and 2020, the Company allocated ceding commission income of $ 35.2 million and $ 32.3 million to policy acquisition costs and $ 11.6 million and $ 10.6 million to general and administrative expenses, respectively. The table below depicts the activity regarding deferred reinsurance ceding commission during the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) Beginning balance of deferred ceding commission income $ 39,940 $ 34,562 $ 39,995 $ 37,464 Ceding commission deferred 17,659 17,294 48,447 43,213 Less: ceding commission earned ( 15,978 ) ( 14,129 ) ( 46,821 ) ( 42,950 ) Ending balance of deferred ceding commission income (1) $ 41,621 $ 37,727 $ 41,621 $ 37,727 1. Deferred ceding commission income is classified in “Accounts payable and other liabilities” on the Company’s condensed consolidated balance sheet.

Deferred Policy Acquisition Cos

Deferred Policy Acquisition Costs	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Deferred Policy Acquisition Costs	NOTE 10. DEFERRED POLICY ACQUISITION COSTS The Company defers certain costs in connection with written policies, called deferred policy acquisition costs (“DPAC”), which are amortized over the effective period of the related insurance policies. The Company anticipates that its DPAC will be fully recoverable in the near term. The table below depicts the activity regarding DPAC for the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) Beginning Balance $ 95,967 $ 81,590 $ 89,265 $ 77,211 Policy acquisition costs deferred 47,976 42,096 144,380 128,400 Amortization ( 48,518 ) ( 37,546 ) ( 138,220 ) ( 119,471 ) Ending Balance $ 95,425 $ 86,140 $ 95,425 $ 86,140

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 11. INCOME TAXES For the three months ended September 30, 2021 and 2020, the Company recorded an income tax benefits of $( 1.1 ) million and $( 1.5 ) million, respectively, which corresponds to effective tax rates of 6.4 % and 22.3 %, respectively. For the nine months ended September 30, 2021 and 2020, the Company recorded an income tax benefit of $( 5.6 ) million and an income tax expense of $ 2.8 million, respectively, which corresponds to effective rates of 18.1 % and 29.9 %, respectively. Effective tax rates are dependent upon components of pre-tax earnings and the related tax effects. The effective tax rate for each period was affected by various permanent tax differences, predominately disallowed executive compensation deductions which were further limited in 2018 and future years upon the enactment of H.R.1, commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”). Additionally, the state effective income tax rate can also fluctuate as a result of changes in the geographic dispersion of the Company’s business. The effective tax rate can fluctuate throughout the year as estimates used in the tax provision for each quarter are updated as more information becomes available throughout the year. The table below summarizes the significant components of the Company’s net deferred tax liability: September 30, 2021 December 31, 2020 Deferred tax assets: (In thousands) Unearned premiums $ 13,101 $ 15,303 Unearned commission 9,649 9,272 Net operating loss 1,880 1,885 Tax-related discount on loss reserve 3,809 3,322 Stock-based compensation 225 113 Accrued expenses 1,456 982 Leases 738 394 Unrealized losses 373 — Other 719 343 Total deferred tax asset 31,950 31,614 Deferred tax liabilities: Deferred acquisition costs 22,122 20,694 Prepaid expenses 184 236 Unrealized gains — 1,814 Property and equipment 1,398 1,669 Note discount 203 326 Basis in purchased investments 37 53 Basis in purchased intangibles 14,652 15,693 Internal revenue code 481(a)-Accounting method change 5,361 8,577 Other 1,658 1,029 Total deferred tax liabilities 45,615 50,091 Net deferred tax liability $ ( 13,665 ) $ ( 18,477 ) The statute of limitations related to the Company’s federal and state income tax returns remains open from the Company’s filings for 2018 through 2020. In April 2019, the Company was notified by the tax authority that the federal income tax returns for the years 2015, 2016 and 2017 would be examined. In August 2020, the Company received a notice from the tax authority for the examined tax years, reporting that the returns were accepted as final. No further action will be required, and no other tax years are under examination. At September 30, 2021 and December 31, 2020, we had no significant uncertain tax positions or unrecognized tax benefits that, if recognized, would impact the effective income tax rate.

Reinsurance

Reinsurance	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Reinsurance	NOTE 12. REINSURANCE Overview In order to limit the Company’s potential exposure to individual risks and catastrophic events, the Company purchases significant reinsurance from third party reinsurers. Purchasing reinsurance is an important part of the Company’s risk strategy, and premiums ceded to reinsurers is one of the Company’s largest costs. The Company has strong relationships with reinsurers, which it attributes to its management’s industry experience, disciplined underwriting, and claims management capabilities. For each of the twelve months beginning June 1, 2020 and 2021, the Company purchased reinsurance from the following sources: (i) the Florida Hurricane Catastrophe Fund, a state-mandated catastrophe fund (“FHCF”) for Florida policies only, (ii) private reinsurers, all of which were rated “A-” or higher by A.M. Best Company, Inc. (“A.M. Best”) or Standard & Poor’s Financial Services LLC (“S&P”) or were fully collateralized, and (iii) the Company’s wholly-owned reinsurance subsidiary, Osprey Re Ltd. (“Osprey”). In addition to purchasing excess of loss catastrophe reinsurance, the Company also purchased quota share, property per risk and facultative reinsurance. The Company’s quota share program limits its exposure on catastrophe and non-catastrophe losses and provides ceding commission income. The Company’s per risk programs limit its net exposure in the event of a severe non-catastrophe loss impacting a single location or risk. The Company also utilizes facultative reinsurance to supplement its per risk reinsurance program where the Company capacity needs dictate. Purchasing a sufficient amount of reinsurance to cover catastrophic losses from single or multiple events or significant non-catastrophe losses is an important part of the Company’s risk strategy. Reinsurance involves transferring, or “ceding”, a portion of the risk exposure on policies we write to another insurer, known as a reinsurer. To the extent that the Company’s reinsurers are unable to meet the obligations they assume under the Company’s reinsurance agreements, the Company remains liable for the entire insured loss. The Company’s reinsurance agreements are prospective contracts. The Company record an asset, prepaid reinsurance premiums, and a liability, reinsurance payable, for the entire contract amount upon commencement of the Company’s new reinsurance agreements. The Company generally amortizes its catastrophe reinsurance premiums ratably over the 12-month contract period, which is June 1 through May 31. Its quota share reinsurance is amortized over the 12-month contract period and may be purchased on a calendar or fiscal year basis. In the event that the Company incurs losses and loss adjustment expenses recoverable under its reinsurance program, the Company records amounts recoverable from its reinsurers on paid losses plus an estimate of amounts recoverable on unpaid losses. The estimate of amounts recoverable on unpaid losses is a function of its liability for unpaid losses associated with the reinsured policies; therefore, the amount changes in conjunction with any changes to its estimate of unpaid losses. As a result, a reasonable possibility exists that an estimated recovery may change significantly in the near term from the amounts included in the Company’s condensed consolidated financial statements. The Company’s insurance regulators require all insurance companies, like us, to have a certain amount of capital and reinsurance coverage in order to cover losses and loss adjustment expenses upon the occurrence of a catastrophic event. The Company’s reinsurance program provides reinsurance in excess of its state regulator requirements, which are based on the probable maximum loss that it would incur from an individual catastrophic event estimated to occur once in every 100 years based on its portfolio of insured risks. The nature, severity and location of the event giving rise to such a probable maximum loss differs for each insurer depending on the insurer’s portfolio of insured risks, including, among other things, the geographic concentration of insured value within such portfolio. As a result, a particular catastrophic event could be a one-in-100-year loss event for one insurance company while having a greater or lesser probability of occurrence for another insurance company. The Company also purchases reinsurance coverage to protect against the potential for multiple catastrophic events occurring in the same year. The Company shares portions of its reinsurance program coverage among its insurance company affiliates. 2021-2022 Reinsurance Program Catastrophe Excess of Loss Reinsurance Effective June 1, 2021, the Company entered into catastrophe excess of loss reinsurance agreements covering Heritage Property & Casualty Insurance Company (“Heritage P&C”), Zephyr Insurance Company (“Zephyr”) and Narragansett Bay Insurance Company (“NBIC”). The catastrophe reinsurance programs are allocated among traditional reinsurers, the Florida Hurricane Catastrophe Fund (“FHCF”) and Osprey Re Ltd (“Osprey”), the Company’s captive reinsurer. The FHCF covers Florida risks only and the Company elected to participate at 90 %. For the 2021 hurricane season, Osprey Re will provide reinsurance only for a portion of the Heritage P&C program, covering the southeastern region. The Company’s third-party reinsurers are either rated “A-” or higher by A.M. Best or S&P or are fully collateralized, to reduce credit risk. The reinsurance program, which is segmented into layers of coverage, protects the Company for excess property catastrophe losses and loss adjustment expenses. The 2021-2022 reinsurance program provides first event coverage up to $ 1.43 billion for Heritage P&C, first event coverage up to $ 1.1 billion for NBIC, and first event coverage up to $ 680.0 million for Zephyr. The Company’s first event retention in a 1 in 100 year event would include retention for the respective insurance company as well as any retention by Osprey. The first event maximum retention up to a 1 in 100 year event for each insurance company subsidiary is as follows: Heritage P&C – $ 32.0 million, which would be 100 % ceded to Osprey; Zephyr – $ 32 million; and NBIC – $ 20.7 million. The majority of the Company’s program was placed on a cascading basis which provides greater horizontal protection in a multiple small events scenario and features additional coverage enhancements. The Company is responsible for all losses and loss adjustment expenses in excess of our reinsurance program. For second or subsequent catastrophic events, the Company’s total available coverage depends on the magnitude of the first event, as the Company may have coverage remaining from layers that were not previously fully exhausted. An aggregate of $ 2.8 billion of limit purchased in 2021 includes reinstatement through the purchase of reinstatement premium protection. The amount of coverage, however, will be subject to the severity and frequency of such events. The Company's estimated net cost for the 2021-2022 catastrophe reinsurance programs is approximately $ 312.0 million. Net Quota Share Reinsurance The Company’s Net Quota Share coverage is proportional reinsurance, which applies to business underwritten by NBIC, for which certain of the Company’s other reinsurance (property catastrophe excess of loss and the second layer of the general excess of loss) inures to the quota share program. An occurrence limit of $ 20.0 million for catastrophe losses is in effect on the quota share program, subject to certain aggregate loss limits that vary by reinsurer. The amount and rate of ceding commissions slide, within a prescribed minimum and maximum, depending on loss performance. The Net Quota Share program was renewed on December 31, 2020 ceding 56.5 % of the net premiums and losses and 3 % of the prior year quota share is in run off. The Company placed 100 % of an occurrence contract for the Company’s business underwritten by NBIC which covers all catastrophe losses excluding named storms, on December 31, 2020, expiring December 31, 2021 . The limit on the contract is $ 20.0 million with a retention of $ 20.0 million and has one reinstatement available. Per Risk Coverage For losses arising from business underwritten by Heritage P&C and losses arising from commercial residential business underwritten by NBIC, excluding losses from named storms, the Company purchased property per risk coverage for losses and loss adjustment expenses in excess of $ 1.0 million per claim. The limit recovered for an individual loss is $ 9.0 million and total limit for all losses is $ 27.0 million. There are two reinstatements available with additional premium due based on the amount of the layer exhausted. For losses arising from commercial residential business underwritten by NBIC, the Company purchased property per risk coverage for losses and loss adjustments expenses in excess of $ 750,000 per claim. The limit recovered for an individual loss is $ 250,000 and total limit for all losses is $ 750,000 . There are two reinstatements available with additional premium due based on the amount of the layer exhausted. In addition, the Company purchased facultative reinsurance for losses in excess of $ 10.0 million for any properties it insured where the total insured value exceeded $ 10.0 million. This coverage applies to losses arising from business underwritten by Heritage P&C and losses arising commercial residential business underwritten by NBIC, excluding losses from named storms. General Excess of Loss The Company’s general excess of loss reinsurance protects business underwritten by NBIC and Zephyr multi-peril policies from single risk losses. For the contract period of July 1, 2021 through June 30, 2022, the coverage is in two layers in excess of the Company’s retention of the first $ 500,000 of loss. The first layer is $ 250,000 excess $ 500,000 for property and casualty losses and the second layer for property losses is $ 2.75 million excess $ 750,000 . The second layer for casualty losses is $ 1.25 million excess $ 750,000 In addition, the Company purchased facultative reinsurance for losses underwritten by NBIC in excess of $ 3.5 million. For a detailed discussion of the Company’s 2020-2021 Reinsurance Program please Refer to Part II, Item 8, “Financial Statements and Supplementary Data” and “ Note 12. Reinsurance ” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, which was filed with the SEC on March 9, 2021. Effect of Reinsurance The Company’s reinsurance arrangements had the following effect on certain items in the condensed consolidated statement of income for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) (In thousands) Premium written: Direct $ 274,178 $ 278,242 $ 886,059 $ 797,776 Ceded ( 53,505 ) ( 63,493 ) ( 491,677 ) ( 422,092 ) Net $ 220,673 $ 214,749 $ 394,382 $ 375,684 Premiums earned: Direct $ 294,409 $ 254,982 $ 850,466 $ 731,489 Ceded ( 131,964 ) ( 116,752 ) ( 399,323 ) ( 338,197 ) Net $ 162,445 $ 138,230 $ 451,143 $ 393,292 Loss and Loss Adjustment Expenses Direct $ 195,099 $ 205,337 $ 483,382 $ 452,014 Ceded ( 65,467 ) ( 85,619 ) ( 155,006 ) ( 185,245 ) Net $ 129,632 $ 119,718 $ 328,376 $ 266,769

Reserve For Unpaid Losses

Reserve For Unpaid Losses	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Reserve for Unpaid Losses	NOTE 13. RESERVE FOR UNPAID LOSSES The Company determines the reserve for unpaid losses on an individual-case basis for all incidents reported. The liability also includes amounts which are commonly referred to as incurred but not reported, or “IBNR”, claims as of the balance sheet date. The Company estimates its IBNR reserves by projecting its ultimate losses using industry accepted actuarial methods and then deducting actual loss payments and case reserves from the projected ultimate losses. The table below summarizes the activity related to the Company’s reserve for unpaid losses: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) Balance, beginning of period $ 625,979 $ 620,718 $ 659,341 $ 613,533 Less: reinsurance recoverable on unpaid losses 366,879 404,370 397,688 393,630 Net balance, beginning of period 259,100 216,348 261,653 219,903 Incurred related to: Current year 130,425 125,544 331,374 281,698 Prior years ( 793 ) ( 5,826 ) ( 2,998 ) ( 14,929 ) Total incurred 129,632 119,718 328,376 266,769 Paid related to: Current year 75,508 71,955 171,128 148,563 Prior years 27,273 18,371 132,950 92,369 Total paid 102,781 90,326 304,078 240,932 Net balance, end of period 285,951 245,740 285,951 245,740 Plus: reinsurance recoverable on unpaid losses 350,195 417,257 350,195 417,257 Balance, end of period $ 636,146 $ 662,997 $ 636,146 $ 662,997 As of September 30, 2021, the Company reported $ 286.0 million in unpaid losses and loss adjustment expenses, net of reinsurance which included $ 213.5 million attributable to IBNR net of reinsurance recoverable, or 74.7 % of net reserves for unpaid losses and loss adjustment expenses.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 14. LONG-TERM DEBT Convertible Senior Notes In August 2017 and September 2017, the Company issued in aggregate $ 136.8 million of 5.875 % Convertible Senior Notes (“Convertible Notes”) maturing on August 1, 2037 , unless earlier repurchased, redeemed or converted. Interest is payable semi-annually in arrears, on February 1, and August 1 of each year. As of September 30, 2021, the Company had $ 22.7 million of the Convertible Notes outstanding, net of issuance and debt discount costs in aggregate of approximately $ 716,900 . For each of the respective nine month periods ended September 30, 2021 and 2020, the Company made interest payments, net of affiliated Convertible Notes of approximately $ 1.3 million on the Convertible Notes. Senior Secured Credit Facility In December 2018, the Company entered into a five-year , $ 125.0 million credit agreement (the “Credit Agreement”) with a syndicate of lenders consisting of $ 75.0 million senior secured term loan facility (the “Term Loan Facility”) and a $ 50.0 million senior secured revolving credit facility (the “Revolving Credit Facility” and together with the Term Loan Facility, the “Credit Facilities”). O n July 28, 2021, the Company entered into the Fifth Amendment to the Credit Agreement (the “Fifth Amendment”) with the guarantors and lenders party thereto. The Fifth Amendment amended the Credit Agreement to, among other things, (i) increase the Revolving Credit Facility from $ 50 million to $ 75 million and make related changes to the Credit Agreement, (ii) provide for a $ 13.75 million advance under the existing $ 75 million Term Loan Facility for an aggregate of $ 70 million principal amount outstanding as of the date of the Fifth Amendment, extend the maturity of the Term Loan Facility from December of 2023 to July 2026 and reduce the amortization of the Term Loan Facility, (iii) reduce the applicable margin for loans under the Credit Agreement to 2.5 % to 3.0 % per annum for LIBOR loans (reduced from the prior range of 3.25 % to 3.75 %) and 1.5% to 2.0% per annum for base rate loans (reduced from the prior range of 2.25 % to 2.75 %) , in each case based on a consolidated leverage ratio ranging from less than or equal to 1.25 -to-1 to greater than 2.25 -to-1 (previously less than or equal to 2.0 -to-1 to greater than 3.0 -to-1) , (iv) reduce the restriction on negative covenants thereby allowing the Company greater flexibility and (iv) provide mechanics relating to a transition away from LIBOR as a benchmark interest rate. All other material terms of the Credit Agreement remain unchanged. Term Loan Facility: The principal amount of the Term Loan Facility, as amended, amortizes in quarterly installments, beginning with the close of the fiscal quarter ending March 31, 2019, in an amount equal to (i) $ 1.9 million per quarter prior to July 29, 2021, (ii) $ 875,000 per quarter commencing with the quarter ending December 31, 2021 and (iii) $ 1.3 million thereafter, with the remaining balance payable at maturity. As of December 31, 2020, there was $ 60.0 million in aggregate principal outstanding on the Term Loan Facility. On July 28, 2021, the principal amount of the term loan outstanding under the Term Loan Facility was increased by $ 13.75 million to a total of $ 70.0 million from $ 56.3 million prior to the advance. For the nine months ended September 30, 2021 and 2020, the Company made interest payments of approximately $ 1.5 million and $ 2.1 million on the term loan, respectively. Revolving Credit Facility : The Revolving Credit Facility, as amended, allows for borrowings of up to $ 75.0 million inclusive of a $ 5.0 million sublimit for the issuance of letters of credit and a $ 10.0 million sublimit for swingline loans. As of September 30, 2021, and December 31, 2020, the Company had $ 0 and $ 10 million of borrowings and no letters of credit outstanding under the Revolving Credit Facility, respectively. In connection with the Fifth Amendment of the Credit Agreement, the Revolving Credit Facility's outstanding balance of $ 10 million was paid in full. For the nine months ended September 30, 2021 and 2020, the Company made interest payments of $ 196,500 and $ 451,500 under the Revolving Credit Facility, respectively. At September 30, 2021, the effective interest rate for the Term Loan and for the Revolving Credit Facility was 2.87 %. On March 31, 2021, the Company closed the July 1, 2020 standby letter of credit in the amount of $ 31.5 million that was issued by Regions Bank. On June 1, 2020, the Company amended the Credit Agreement by entering into the Third Amendment to Credit Agreement (the “Third Amendment”) with the lenders from time to time party to the Credit Agreement, and Regions Bank, as administrative agent and collateral agent. The Third Amendment modified the Credit Agreement to increase the letter of credit sublimit from $ 5 million to $ 40 million and to make related modifications to certain of the negative covenants in the Credit Agreement. On April 27, 2020, the Company amended the Credit Agreement by entering into the Second Amendment to Credit Agreement (the “Second Amendment”) with the lenders from time to time party to the Credit Agreement, and Regions Bank, as administrative agent and collateral agent. The Second Amendment modified the negative covenants in the Credit Agreement to permit the Company to make acquisitions and investments if, after giving effect to the acquisition or investment, either (1) the Company has an aggregate of $ 25.0 million in cash and availability under the revolving credit facility or (2) the consolidated leverage ratio under the Credit Agreement is at least a quarter turn less than the required ratio for the trailing four quarters. The amendment gives the Company more flexibility to make acquisitions and investments in the future. All other material terms of the Credit Agreement remain unchanged. Mortgage Loan In October 2017, the Company and its subsidiary, Skye Lane Properties LLC, jointly obtained a commercial real estate mortgage loan in the amount of $ 12.7 million, bearing interest of 4.95 % per annum and maturing on October 30, 2027 . On October 30, 2022, the interest rate shall adjust to an interest rate equal to the annualized interest rate of the United States 5-year Treasury Notes as reported by Federal Reserve on a weekly average basis plus 3.10 %. The Company makes monthly principal and interest payments towards the loan. For each of the respective nine-month periods ended September 30, 2021 and 2020, the Company made principal and interest payments of approximately $ 670,000 on the mortgage loan. FHLB Loan Agreements In December 2018, a subsidiary of the Company received a 3.094 % fixed interest rate cash loan of $ 19.2 million from the Federal Home Loan Bank (“FHLB”) Atlanta. In connection with the loan agreement, the subsidiary became a member of FHLB. Membership in the FHLB required an investment in FHLB’s common stock which was purchased in December 2018 and valued at $ 1.4 million. Additionally, the transaction required the acquired FHLB common stock and certain other investments to be pledged as collateral. As of September 30, 2021, the fair value of the collateralized securities was $ 22.7 million and the equity investment in FHLB common stock was $ 1.2 million. As of September 30, 2021, and 2020, the Company made quarterly interest payments as per the terms of the loan agreement of approximately $ 450,500 and $ 457,100 , respectively. As of September 30, 2021, and December 31, 2020, the Company also holds other common stock from FHLB Des Moines, and FHLB Boston valued at $ 215,900 and $ 222,900 , respectively. The following table summarizes the Company’s debt and credit facilities as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (in thousands) Convertible debt $ 23,413 $ 23,413 Mortgage loan 11,599 11,827 Term loan facility 70,000 60,000 Revolving credit facility — 10,000 FHLB loan agreement 19,200 19,200 Total principal amount $ 124,212 $ 124,440 Less: unamortized discount and issuance costs $ 2,731 $ 3,442 Total long-term debt $ 121,481 $ 120,998 As of the date of this report, the Company was in compliance with the applicable terms of all its covenants and other requirements under the Credit Agreement, Convertible Notes indenture, cash borrowings and other loans. The Company’s ability to secure future debt financing depends, in part, on its ability to remain in such compliance. Provided there is no default or an event of default, the Company is permitted to payout dividends in an aggregate amount not to exceed $ 10.0 million in any fiscal year. The covenants and other requirements under the revolving agreement represent the most restrictive provisions that the Company is subject to with respect to its long-term debt. The schedule of principal payments on long-term debt as of September 30, 2021 is as follows: Year Amount (In thousands) 2021 remaining $ 953 2022 3,822 2023 23,039 2024 4,292 2025 5,624 Thereafter 86,482 Total $ 124,212

Accounts Payable and Other Liab

Accounts Payable and Other Liabilities	9 Months Ended
	Sep. 30, 2021
Other Liabilities Disclosure [Abstract]
Accounts Payable and Other Liabilities	NOTE 15. ACCOUNTS PAYABLE AND OTHER LIABILITIES Accounts payable and other liabilities consist of the following as of September 30, 2021 and December 31, 2020: Description September 30, 2021 December 31, 2020 (In thousands) Deferred ceding commission $ 41,621 $ 39,995 Outstanding claim checks — 10,864 Accounts payable and other payables 6,951 9,248 Accrued interest and issuance costs 592 833 Accrued dividends 1,680 1,670 Other liabilities 257 80 Premium tax 1,531 — Commission payables 14,404 18,245 Total other liabilities $ 67,036 $ 80,935

Statutory Accounting and Regula

Statutory Accounting and Regulations	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Statutory Accounting and Regulations	NOTE 16. STATUTORY ACCOUNTING AND REGULATIONS State laws and regulations, as well as national regulatory agency requirements, govern the operations of all insurers such as the Company’s insurance subsidiaries. The various laws and regulations require that insurers maintain minimum amounts of statutory surplus and risk-based capital, restrict insurers’ ability to pay dividends, restrict the allowable investment types and investment mixes, and subject the Company’s insurers to assessments. The Company’s insurance subsidiaries Heritage Property & Casualty Insurance Company (“Heritage P&C)”, Narragansett Bay Insurance Company (“NBIC”), Zephyr Insurance Company (“Zephyr”), and Pawtucket Insurance Company (“PIC”) must maintain capital and surplus ratios or balances as determined by the regulatory authority of the states in which they are domiciled. Heritage P&C is required to maintain capital and surplus equal to the greater of $ 15 million or 10 % of their respective liabilities. Zephyr is required to maintain a deposit of $ 750,000 in a federally insured financial institution. NBIC is required to maintain capital and surplus of $ 3.0 million. The combined statutory surplus for Heritage P&C, Zephyr, NBIC and PIC was $ 290.0 million at September 30, 2021 and $ 333.3 million at December 31, 2020. State law also requires the Company’s insurance subsidiaries to adh ere to prescribed premium-to-capital surplus ratios, and risk-based capital requirements with which the Company is in compliance. At September 30, 2021, the Company’s insurance subsidiaries met the financial and regulatory requirements of each of the states in which they conduct business.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 17. COMMITMENTS AND CONTINGENCIES The Company is involved in claims-related legal actions arising in the ordinary course of business. The Company accrues amounts resulting from claims-related legal actions in unpaid losses and loss adjustment expenses during the period that it determines an unfavorable outcome becomes probable and it can estimate the amounts. Management makes revisions to its estimates based on its analysis of subsequent information that the Company receives regarding various factors, including: (i) per claim information; (ii) company and industry historical loss experience; (iii) judicial decisions and legal developments in the awarding of damages; and (iv) trends in general economic conditions, including the effects of inflation.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 18. RELATED PARTY TRANSACTIONS From time to time the Company has been party to various related party transactions involving certain of its officers, directors and significant stockholders, including as set forth below. The Company has entered into each of these arrangements without obligation to continue its effect in the future and the associated expense was immaterial to its results of operations or financial position as of September 30, 2021 and 2020.  In July 2019, the Board of Directors appointed Mark Berset to the Board of Directors of the Company. Mr. Berset is also the Chief Executive Officer of Comegys Insurance Agency, Inc. (“Comegys”), an independent insurance agency that writes policies for Company. The Company pays commission to Comegys based upon standard industry rates consistent with those provided to the Company’s other insurance agencies. There are no arrangements or understandings between Mr. Berset and any other persons with respect to his appointment as a director. For the three and nine months ended September 30, 2021 and 2020, the Company paid agency commission to Comegys of approximately $ 53,900 and $ 46,300 and $ 595,700 and $ 592,400 , respectively.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	NOTE 19. EMPLOYEE BENEFIT PLANS The Company provides a 401(k) plan for substantially all employees. The Company provides a matching contribution of 100 % on the first 3% of employees’ contribution and 50 % on the next 2% of the employees’ contribution to the plan. The maximum match is 4 %. For the three months ended September 30, 2021 and 2020, the contributions made to the plan on behalf of the participating employees were approximately $ 293,000 and $ 265,000 and for the nine months ended September 30, 2021 and 2020, contributions made to the plan were approximately $ 985,000 and $ 897,000 , respectively. Effective September 1, 2021, the Company terminated its self-insured healthcare plan and enrolled in a flex healthcare plan which allows employees the choice of three medical plans with a range of coverage levels and costs. For the three months ended September 30, 2021 and 2020, the Company incurred medical premium costs including the new 2021-2022 healthcare premiums, of $ 1.6 million and $ 941,000 , respectively. For the nine months ended September 30, 2021 and 2020, the Company incurred medical premium costs of $ 2.6 million and $ 3.0 million, respectively. An additional liability from the Company's self-insured healthcare plan was accrued for approximately $ 442,000 and $ 1.4 million for unpaid claims as of September 30, 2021 and December 31, 2020, respectively.

Equity

Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Equity	NOTE 20. EQUITY The total amount of authorized capital stock consists of 50,000,000 shares of common stock and 5,000,000 shares of preferred stock. As of September 30, 2021, the Company had 27,802,626 shares of common stock outstanding, 9,427,948 treasury shares of common stock and 240,835 unvested restricted common stock with accrued dividends reflecting total paid-in capital of $ 332.6 million as of such date. As more fully disclosed in the Company’s audited consolidated financial statements for the year ended December 31, 2020, there were, 27,748,606 shares of common stock outstanding, 9,279,839 treasury shares of common stock and 100,267 unvested shares of restricted common stock, representing $ 331.9 million of additional paid-in capital. Common Stock Holders of common stock are entitled to one vote for each share held on all matters subject to a vote of stockholders, subject to the rights of holders of any outstanding preferred stock. Accordingly, holders of a majority of the shares of common stock entitled to vote in any election of directors may elect all of the directors standing for election, subject to the rights of holders of any outstanding preferred stock. Holders of common stock will be entitled to receive ratably any dividends that the board of directors may declare out of funds legally available therefor, subject to any preferential dividend rights of outstanding preferred stock. Upon the Company’s liquidation, dissolution or winding up, the holders of common stock will be entitled to receive ratably its net assets available after the payment of all debts and other liabilities and subject to the prior rights of holders of any outstanding preferred stock. Holders of common stock have no preemptive, subscription, redemption or conversion rights. There is no redemption or sinking fund provisions applicable to the common stock. All outstanding shares of the Company’s capital stock are fully paid and non-assessable. Stock Repurchase Program On August 1, 2019, the Company announced that its Board of Directors ratified a stock repurchase program authorizing the Company to repurchase up to $ 50.0 million of its common stock which had expired on December 31, 2020 . As of December 31, 2020, the Company repurchased in aggregate 2,065,042 shares of its common stock since authorizing the stock repurchase program for $ 26.2 million. On November 2, 2020, the Board of Directors extended the Company’s existing share repurchase program from December 31, 2020 to December 31, 2021 and increased the authorization under the program from the $ 23.8 million remaining to $ 50.0 million, which repurchases may be made under the Company’s current Rule 10b5-1 trading plan, which allows the Company to purchase shares below a predetermined price per share, or otherwise. As of September 30, 2021, the Company repurchased in aggregate 148,109 shares of its common stock under its repurchase program for $ 1.0 million. At September 30, 2021, the Company has the capacity under its stock repurchase program to repurchase $ 49 million of its common shares until December 31, 2021. Dividends On March 3, 2021, the Company’s Board of Directors declared a $ 0.06 per share quarterly dividend payable on April 6, 2021 , to stockholders of record as of March 15, 2021 . On May 5, 2021, the Board of Directors declared a $ 0.06 per share quarterly dividend payable on July 6, 2021 to stockholders of record as of June 15, 2021 . On August 5, 2021, the Company announced that its Board of Directors declared a $ 0.06 per share quarterly dividend payable on October 6, 2021 to stockholders of record as of September 15, 2021 . The declaration and payment of any future dividends will be subject to the discretion of the Board of Directors and will depend on a variety of factors including the Company’s financial condition and results of operations.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	NOTE 21. STOCK-BASED COMPENSATION Common, Restricted and Performance-based Stock The Company has adopted the Heritage Insurance Holdings, Inc., Omnibus Incentive Plan (the “Plan”) effective on May 22, 2014. The Plan authorized 2,981,737 shares of common stock for issuance under the Plan for future grants. The Company’s plan allows for a variety of equity awards including stock options, restricted stock awards and performance-based awards. At September 30, 2021 there were 939,691 shares available for grant under the Plan. The Company recognizes compensation expense under ASC 718 for its stock-based payments based on the fair value of the awards. During the quarter ended March 31, 2021, the Company issued to its Chief Executive Officer 95,878 performance-based restricted shares with a market value at the time of grant of $ 10.43 per share. The performance-based restricted shares have a three-year performance period beginning on January 1, 2021 and ending on December 31, 2023 and will vest following the end of the performance period but no later than March 5, 2024. The number of shares that will be earned at the end of the performance period is subject to decrease based on the results of the performance condition. In addition, the Company issued this executive 47,939 time-based restricted shares with a market value at the time of grant of $ 10.43 per share. The time-based restricted shares will vest in three equal installments of 15,979 on December 31, 2021, and 15,980 on December 31, 2022 and 2023, respectively. During the second quarter ended June 30, 2021, the Company issued to its Chief Financial Officer 28,012 performance-based restricted shares with a market value at the time of grant of 10.71 per share. The performance-based restricted shares have a three-year performance period beginning on January 1, 2021 and ending December 31, 2023 and will vest following the end of the performance period but no later than March 5, 2024. The number of shares that will be earned at the end of the performance period is subject to decrease based on the results of the performance condition. In addition, the Company issued this executive 14,006 time-based restricted shares with a market value at the time of grant of $ 10.71 per share. The time-based restricted shares will vest in three equal installments 4,668 on December 31, 2021 and 4,669 on December 31, 2022 and 2023, respectively. For awards with performance-based vesting conditions expense is not recognized until it is determined that it is probable the performance-based conditions will be met. When achievement of a performance-based condition is probable, a catch-up of expense will be recorded as if the award had been vesting on a straight-line basis from the award date. The award will continue to be expensed on a straight-line basis until probability of achieving the performance-based conditions changes, if applicable. For awards with only a service condition, the Company expenses stock-based compensation using the straight-line method over the requisite service period for the entire award. The Plan authorizes the Company to grant stock options at exercise prices equal to the fair market value of the Company’s stock on the dates the options are granted. Any options granted would typically have a maximum term of ten years from the date of grant and vest primarily in equal annual installments over a range of one to five-year periods following the date of grant for employee options. The Company has not granted any stock options since 2015 and all unexercised stock options have since been forfeited. The Company has also granted shares of its common stock subject to certain restrictions under the Plan. Restricted stock awards granted to employee’s vest in equal installments generally over a five-year period from the grant date subject to the recipient’s continued employment. The fair value of restricted stock awards is estimated by the market price at the date of grant and amortized on a straight-line basis to expense over the period of vesting. Recipients of restricted stock awards have the right to receive dividends. Restricted stock activity for the nine months ended September 30, 2021 is as follows: Number of shares Weighted-Average Grant-Date Fair Value per Share Non-vested, at December 31, 2020 100,267 $ 15.37 Granted - Performance-based restricted stock 123,890 10.49 Granted - Time-based restricted stock 61,945 10.49 Vested ( 26,294 ) 12.07 Canceled and surrendered ( 18,973 ) 13.04 Non-vested, at September 30, 2021 240,835 $ 12.15 Awards are being amortized to expense over the one to five-year vesting period. The Company recognized $ 320,000 and $ 1.4 million of compensation expense for the three months ended September 30, 2021 and 2020, respectively. For the nine months ended September 30, 2021 and 2020, the Company recognized compensation expense of $ 867,000 and $ 4.1 million, respectively. For the nine months ended September 30, 2021, 40,267 shares of restricted stock were vested and released, all of which had been granted to employees. Of the shares released to employees, 18,973 shares were withheld by the Company to cover withholding taxes of $ 171,000 . For the comparable period of 2020, 35,267 shares were vested and released of which 22,223 shares were withheld by the Company to cover withholding taxes of $ 297,000 . At September 30, 2021, there was approximately $ 1.0 million unrecognized expense related to time-based non-vested restricted stock and an additional $ 1.1 million for performance-based restricted stock, which is expected to be recognized over the remaining restriction periods as described in the table below. For the comparable period in 2020, there was $ 1.6 million of unrecognized expense. Additional information regarding the Company’s outstanding non-vested time-based restricted stock and performance-based restricted stock at September 30, 2021 is as follows: Grant date Restricted shares unvested Share Value at Grant Date Per Share Remaining Restriction Period (Years) February 12, 2018 50,000 $ 16.35 1.25 April 24, 2020 5,000 $ 10.60 0.60 January 4, 2021 143,817 $ 10.43 2.25 April 13, 2021 42,018 $ 10.71 2.25 240,835

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	NOTE 22. SUBSEQUENT EVENTS The Company performed an evaluation of subsequent events through the date the condensed consolidated financial statements were issued and determined there were no recognized or unrecognized subsequent events that would require an adjustment or additional disclosure in the condensed consolidated financial statements as of September 30, 2021. On November 4, 2021 , the Company announced that its Board of Directors declared a $ 0.06 per share quarterly dividend payable on January 6, 2022 to stockholders of record as of December 15, 2021 .

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements include the accounts of Heritage Insurance Holdings, Inc. (together with its subsidiaries, the “Company”). These statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain financial information that is normally included in annual consolidated financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been omitted. In the opinion of the Company’s management, all material intercompany transactions and balances have been eliminated and all adjustments consisting of normal recurring accruals which are necessary for a fair statement of the financial condition and results of operations for the interim periods have been reflected. The accompanying interim condensed consolidated financial statements and related footnotes should be read in conjunction with the Company’s audited consolidated financial statements and related footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Form 10-K”)
Reclassification	Reclassification Certain prior year amounts reported on the condensed consolidated balance sheet have been reclassified to conform to the current year presentation.
Accounting Pronouncements Not Yet Adopted	Accounting Pronouncements not yet adopted The Company has documented the summary of its significant accounting policies in its Notes to the Audited Consolidated Financial Statements annual report on Form 10-K for the year ended December 31, 2020, filed on March 9, 2021. There have been no material changes to the Company’s accounting policies since the filing of that report. No other new accounting pronouncements issued but not yet effective have had, or are expected to have, a material impact on the Company’s results of operations or financial position.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2021
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Debt Securities Available-for-Sale	The amortized cost, gross unrealized gains and losses, and fair value of the Company’s debt securities available-for-sale are as follows for the periods: September 30, 2021 Cost or Adjusted / Gross Unrealized Gross Unrealized Fair Value Debt Securities Available-for-sale (In thousands) U.S. government and agency securities (1) $ 43,734 $ 284 $ 9 $ 44,009 States, municipalities and political subdivisions 106,019 359 657 105,721 Special revenue 311,752 1,624 1,881 311,495 Hybrid securities 99 1 — 100 Industrial and miscellaneous 199,792 1,244 1,542 199,494 Total $ 661,396 $ 3,512 $ 4,089 $ 660,819 (1) Includes securities at September 30, 2021 with a carrying amount of $ 22.7 million that were pledged as collateral for the advance agreement entered into with a financial institution in 2018. The Company is permitted to withdraw or exchange any portion of the pledged collateral over the minimum requirement at any time. December 31, 2020 Cost or Adjusted / Gross Unrealized Gross Unrealized Fair Value Debt Securities Available-for-sale (In thousands) U.S. government and agency securities (1) $ 29,985 $ 609 $ 1 $ 30,593 States, municipalities and political subdivisions 84,597 1,077 4 85,670 Special revenue 271,194 3,154 27 274,321 Hybrid securities 100 — — 100 Industrial and miscellaneous 167,296 3,070 39 170,327 Total $ 553,172 $ 7,910 $ 71 $ 561,011 (1) Includes securities at December 31, 2020 with a carrying amount of $ 21.6 million that were pledged as collateral for the advance agreement entered into with a financial institution in 2018. The Company is permitted to withdraw or exchange any portion of the pledged collateral over the minimum requirement at any time.
Schedule of Net Realized (Losses) Gains on Debt Securities Available-for-sale	The following table presents net realized (losses) gains on the Company’s debt securities available-for-sale for the three and nine months ended September 30, 2021 and 2020, respectively : 2021 2020 Three Months Ended September 30, Gains Fair Value at Sale Gains Fair Value at Sale (In thousands) Debt Securities Available-for-Sale Total realized gains $ 2 $ 3,470 $ 20,355 $ 290,643 Total realized losses ( 8 ) 226 — — Net realized (losses) gains $ ( 6 ) $ 3,696 $ 20,355 $ 290,643 2021 2020 Nine Months Ended September 30, Gains Fair Value at Sale Gains Fair Value at Sale (In thousands) Debt Securities Available-for-Sale Total realized gains $ 106 $ 24,265 $ 20,492 $ 305,791 Total realized losses ( 10 ) 1,043 ( 115 ) 2,716 Net realized gains $ 96 $ 25,308 $ 20,377 $ 308,507
Summary of Debt Securities by Contractual Maturity Periods	The table below summarizes the Company’s debt securities at September 30, 2021 by contractual maturity periods. Actual results may differ as issuers may have the right to call or prepay obligations, with or without penalties, prior to the contractual maturity of those obligations. At September 30, 2021 Cost or Amortized Cost Percent of Total Fair Value Percent of Total Maturity dates: (In thousands) (In thousands) Due in one year or less $ 44,447 7 % $ 44,628 7 % Due after one year through five years 253,398 38 % 254,377 38 % Due after five years through ten years 220,450 33 % 218,373 33 % Due after ten years 143,101 22 % 143,441 22 % Total $ 661,396 100 % $ 660,819 100 %
Summary of Net Investment Income	The following table summarizes the Company’s net investment income by major investment category for the three and nine months ended September 30, 2021 and 2020, respectively: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) (In thousands) Debt securities $ 1,986 $ 2,170 $ 5,164 $ 8,567 Equity securities — — — — Cash and cash equivalents 17 651 72 1,610 Other investments 514 221 1,101 486 Net investment income 2,517 3,042 6,337 10,663 Less: Investment expenses 969 225 2,540 880 Net investment income, less investment expenses $ 1,548 $ 2,817 $ 3,797 $ 9,783
Schedule of Debt Securities Available-for-Sale in an Unrealized Loss Position, Aggregate Fair Value	The following tables present, for all debt securities available-for-sale in an unrealized loss position (including securities pledged) and for which no credit loss allowance been established to date, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position at September 30, 2021 and December 31, 2020, respectively: Less Than Twelve Months Twelve Months or More September 30, 2021 Number of Gross Fair Value Number of Gross Fair Value Debt Securities Available-for-sale U.S. government and agency securities 10 $ 9 $ 14,441 — $ — $ — States, municipalities and political subdivisions 75 657 66,885 — — — Special revenue 188 1,877 150,757 11 4 101 Industrial and miscellaneous 133 1,542 99,327 — — — Total fixed maturity securities 406 $ 4,085 $ 331,410 11 $ 4 $ 101 Less Than Twelve Months Twelve Months or More December 31, 2020 Number of Gross Fair Value Number of Gross Fair Value Debt Securities Available-for-sale U.S. government and agency securities 3 $ 1 $ 73 1 $ — $ 7 States, municipalities and political subdivisions 6 4 5,158 — — — Special revenue 27 24 16,439 9 3 73 Industrial and miscellaneous 26 39 16,025 — — — Total fixed maturity securities 62 $ 68 $ 37,695 10 $ 3 $ 80
Summary of Carrying Value and Maximum Loss Exposure of Company's Non-consolidated VIEs by Category	The following table summarizes the carrying value and maximum loss exposure of the Company’s non-consolidated VIEs at September 30, 2021 and December 31, 2020: At September 30, 2021 At December 31, 2020 Carrying Value Maximum Loss Exposure Carrying Value Maximum Loss Exposure (in thousands) Investments in non-consolidated VIEs $ 23,887 $ 24,909 $ 26,409 $ 26,409

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value Measurements	The following tables present information about the Company’s assets measured at fair value on a recurring basis. The Company assesses the levels for the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Company’s accounting policy regarding the recognitions of transfers between levels of the fair value hierarchy. The tables below present the balances of the Company’s invested assets measured at fair value on a recurring basis: September 30, 2021 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Invested Assets: (in thousands) Debt Securities Available-for-sale U.S. government and agency securities $ 44,009 $ 366 $ 43,643 $ — States, municipalities and political subdivisions 105,721 — 105,721 — Special revenue 311,495 — 311,495 — Hybrid securities 100 — 100 — Industrial and miscellaneous 199,494 — 199,494 — Total investments $ 660,819 $ 366 $ 660,453 $ — December 31, 2020 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Invested Assets: (in thousands) Debt Securities Available-for-sale U.S. government and agency securities $ 30,593 $ 371 $ 30,222 $ — States, municipalities and political subdivisions 85,670 — 85,670 — Special revenue 274,321 — 274,321 — Hybrid securities 100 — 100 — Industrial and miscellaneous 170,327 — 170,327 — Total investments $ 561,011 $ 371 $ 560,640 $ —

Other Comprehensive (Loss) In_2

Other Comprehensive (Loss) Income (Tables)	9 Months Ended
	Sep. 30, 2021
Comprehensive Income Net Of Tax [Abstract]
Summary of Other Comprehensive (Loss) Income and Tax Impact of Each Component of Other Comprehensive (Loss) Income	The following table is a summary of other comprehensive (loss) income and discloses the tax impact of each component of other comprehensive (loss) income for the three and nine months ended September 30, 2021 and 2020, respectively: For the Three Months Ended September 30, 2021 2020 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive (loss) income Change in unrealized (losses) gains on investments, net $ ( 1,344 ) $ 311 $ ( 1,033 ) $ 2,480 $ ( 574 ) $ 1,906 Reclassification adjustment of realized losses (gains) included in net income 6 ( 1 ) 5 ( 20,355 ) 4,711 ( 15,644 ) Effect on other comprehensive (loss) income $ ( 1,338 ) $ 310 $ ( 1,028 ) $ ( 17,875 ) $ 4,137 $ ( 13,738 ) For the Nine Months Ended September 30, 2021 2020 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive (loss) income Change in unrealized (losses) gains on investments, net $ ( 8,316 ) $ 1,928 $ ( 6,388 ) $ 19,330 $ ( 4,471 ) $ 14,859 Reclassification adjustment of realized gains included in net income ( 96 ) 22 ( 74 ) ( 20,377 ) 4,713 ( 15,664 ) Effect on other comprehensive (loss) income $ ( 8,412 ) $ 1,950 $ ( 6,462 ) $ ( 1,047 ) $ 242 $ ( 805 )

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Components of Lease Costs	Components of the Company’s lease costs for the three and nine months ended September 30, 2021 and 2020 were as follows (in thousands): Three Months Ended Three Months Ended Amortization of ROU assets - Finance leases $ 647 $ 21 Interest on lease liabilities - Finance leases 263 5 Variable lease cost (cost excluded from lease payments) 112 128 Operating lease cost (cost resulting from lease payments) 339 340 Total lease cost $ 1,361 $ 494 Nine Months Ended Nine Months Ended Amortization of ROU assets - Finance leases $ 1,321 $ 64 Interest on lease liabilities - Finance leases 524 16 Variable lease cost (cost excluded from lease payments) 373 391 Operating lease cost (cost resulting from lease payments) 1,018 1,023 Total lease cost $ 3,236 $ 1,494
Supplemental Cash Flow Information and Non-Cash Activity Related to Operating and Financing Leases	Supplemental cash flow information and non-cash activity related to the Company’s operating and financing leases were as follows (in thousands): At September 30, 2021 At September 30, 2020 Finance lease - Operating cash flows $ 31 $ 16 Finance lease - Financing cash flows $ 100 $ 55 Operating lease - Operating cash flows (fixed payments) $ 1,123 $ 1,080 Operating lease - Operating cash flows (liability reduction) $ 840 $ 761
Supplemental Balance Sheet Information Related to Operating and Financing Leases	Supplemental balance sheet information related to the Company’s operating and financing leases as of September 30, 2021 were as follows (in thousands): Balance Sheet September 30, 2021 Right-of-use lease assets - operating Right-of-use lease asset, net $ 5,286 Right-of-use lease assets - finance Right-of-use lease asset, net $ 23,366 Lease liability - operating Lease liability $ 6,844 Lease liability - finance Lease liability $ 25,120
Weighted-Average Remaining Lease Term and Discount Rate for Operating and Financing Leases	Weighted-average remaining lease term and discount rate for the Company’s operating and financing leases as of September 30, 2021 were as follows: September 30, 2021 Weighted average lease term - Finance leases 9.34 yrs. Weighted average lease term - Operating leases 6.40 yrs. Weighted average discount rate - Finance leases 4.2 % Weighted average discount rate - Operating leases 5.3 %
Maturities of Lease Liabilities by Fiscal Year for Operating and Financing Leases	Maturities of lease liabilities by fiscal year for the Company’s operating and financing leases were as follows (in thousands): September 30, 2021 2021 remaining $ 1,142 2022 4,566 2023 4,500 2024 4,194 2025 3,970 Thereafter 20,213 Total lease payments 38,585 Less: imputed interest ( 6,621 ) Present value of lease liabilities $ 31,964

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2021
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net consisted of the following at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (In thousands) Land $ 2,582 $ 2,582 Building 10,141 10,141 Computer hardware and software 7,147 6,358 Office furniture and equipment 2,038 2,027 Tenant and leasehold improvements 8,225 8,133 Vehicle fleet 720 850 Total, at cost 30,853 30,091 Less: accumulated depreciation and amortization ( 12,903 ) ( 11,406 ) Property and equipment, net $ 17,950 $ 18,685

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill (in thousands) Balance as of December 31, 2020 $ 152,459 Goodwill acquired — Impairment — Balance as of September 30, 2021 $ 152,459
Schedule of Estimated Amortization of Intangible Assets	Estimated annual pretax amortization of intangible assets for each of the next five years and thereafter is as follows (in thousands): Year Amount (1) 2021 - remaining $ 1,588 2022 $ 6,351 2023 $ 6,351 2024 $ 6,351 2025 $ 6,315 Thereafter $ 29,243 Total $ 56,199 (1) Excludes insurance licenses valued at $ 1.3 million and classified as an indefinite lived intangible which is subject to annual impairment testing and not amortized.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Earnings Per Share (EPS)	The following table sets forth the computation of basic and diluted earnings per share (“EPS”) for the periods indicated. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Basic (loss) earnings per share: Net (loss) income attributable to common stockholders (000's) $ ( 16,410 ) $ ( 5,233 ) $ ( 25,509 ) $ 6,519 Weighted average shares outstanding 27,938,028 27,739,839 27,902,814 28,053,959 Basic (loss) earnings per share: $ ( 0.59 ) $ ( 0.19 ) $ ( 0.91 ) $ 0.23 Diluted (loss) earnings per share: Net (loss) income attributable to common stockholders (000's) $ ( 16,410 ) $ ( 5,233 ) $ ( 25,509 ) $ 6,519 Weighted average shares outstanding 27,938,028 27,739,839 27,902,814 28,053,959 Weighted average dilutive shares — — — 19,611 Total weighted average dilutive shares 27,938,028 27,739,839 27,902,814 28,073,570 Diluted (loss) earnings per share: $ ( 0.59 ) $ ( 0.19 ) $ ( 0.91 ) $ 0.23

Deferred Reinsurance Ceding C_2

Deferred Reinsurance Ceding Commission (Tables)	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Schedule of Activity with Regard to Deferred Reinsurance Ceding Commission	The table below depicts the activity regarding deferred reinsurance ceding commission during the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) Beginning balance of deferred ceding commission income $ 39,940 $ 34,562 $ 39,995 $ 37,464 Ceding commission deferred 17,659 17,294 48,447 43,213 Less: ceding commission earned ( 15,978 ) ( 14,129 ) ( 46,821 ) ( 42,950 ) Ending balance of deferred ceding commission income (1) $ 41,621 $ 37,727 $ 41,621 $ 37,727 1. Deferred ceding commission income is classified in “Accounts payable and other liabilities” on the Company’s condensed consolidated balance sheet.

Deferred Policy Acquisition C_2

Deferred Policy Acquisition Costs (Tables)	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Summary of Activity in Deferred Policy Acquisition Costs (DPAC)	The Company defers certain costs in connection with written policies, called deferred policy acquisition costs (“DPAC”), which are amortized over the effective period of the related insurance policies. The Company anticipates that its DPAC will be fully recoverable in the near term. The table below depicts the activity regarding DPAC for the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) Beginning Balance $ 95,967 $ 81,590 $ 89,265 $ 77,211 Policy acquisition costs deferred 47,976 42,096 144,380 128,400 Amortization ( 48,518 ) ( 37,546 ) ( 138,220 ) ( 119,471 ) Ending Balance $ 95,425 $ 86,140 $ 95,425 $ 86,140

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Components of Deferred Tax Liability	The table below summarizes the significant components of the Company’s net deferred tax liability: September 30, 2021 December 31, 2020 Deferred tax assets: (In thousands) Unearned premiums $ 13,101 $ 15,303 Unearned commission 9,649 9,272 Net operating loss 1,880 1,885 Tax-related discount on loss reserve 3,809 3,322 Stock-based compensation 225 113 Accrued expenses 1,456 982 Leases 738 394 Unrealized losses 373 — Other 719 343 Total deferred tax asset 31,950 31,614 Deferred tax liabilities: Deferred acquisition costs 22,122 20,694 Prepaid expenses 184 236 Unrealized gains — 1,814 Property and equipment 1,398 1,669 Note discount 203 326 Basis in purchased investments 37 53 Basis in purchased intangibles 14,652 15,693 Internal revenue code 481(a)-Accounting method change 5,361 8,577 Other 1,658 1,029 Total deferred tax liabilities 45,615 50,091 Net deferred tax liability $ ( 13,665 ) $ ( 18,477 )

Reinsurance (Tables)

Reinsurance (Tables)	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Schedule of Effect of Reinsurance Arrangements in Consolidated Statement of Income	Effect of Reinsurance The Company’s reinsurance arrangements had the following effect on certain items in the condensed consolidated statement of income for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) (In thousands) Premium written: Direct $ 274,178 $ 278,242 $ 886,059 $ 797,776 Ceded ( 53,505 ) ( 63,493 ) ( 491,677 ) ( 422,092 ) Net $ 220,673 $ 214,749 $ 394,382 $ 375,684 Premiums earned: Direct $ 294,409 $ 254,982 $ 850,466 $ 731,489 Ceded ( 131,964 ) ( 116,752 ) ( 399,323 ) ( 338,197 ) Net $ 162,445 $ 138,230 $ 451,143 $ 393,292 Loss and Loss Adjustment Expenses Direct $ 195,099 $ 205,337 $ 483,382 $ 452,014 Ceded ( 65,467 ) ( 85,619 ) ( 155,006 ) ( 185,245 ) Net $ 129,632 $ 119,718 $ 328,376 $ 266,769

Reserve for Unpaid Losses (Tabl

Reserve for Unpaid Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Insurance [Abstract]
Summary of Reserve for Unpaid Losses	The table below summarizes the activity related to the Company’s reserve for unpaid losses: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (In thousands) Balance, beginning of period $ 625,979 $ 620,718 $ 659,341 $ 613,533 Less: reinsurance recoverable on unpaid losses 366,879 404,370 397,688 393,630 Net balance, beginning of period 259,100 216,348 261,653 219,903 Incurred related to: Current year 130,425 125,544 331,374 281,698 Prior years ( 793 ) ( 5,826 ) ( 2,998 ) ( 14,929 ) Total incurred 129,632 119,718 328,376 266,769 Paid related to: Current year 75,508 71,955 171,128 148,563 Prior years 27,273 18,371 132,950 92,369 Total paid 102,781 90,326 304,078 240,932 Net balance, end of period 285,951 245,740 285,951 245,740 Plus: reinsurance recoverable on unpaid losses 350,195 417,257 350,195 417,257 Balance, end of period $ 636,146 $ 662,997 $ 636,146 $ 662,997

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Company's Debt and Credit Facilities	The following table summarizes the Company’s debt and credit facilities as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (in thousands) Convertible debt $ 23,413 $ 23,413 Mortgage loan 11,599 11,827 Term loan facility 70,000 60,000 Revolving credit facility — 10,000 FHLB loan agreement 19,200 19,200 Total principal amount $ 124,212 $ 124,440 Less: unamortized discount and issuance costs $ 2,731 $ 3,442 Total long-term debt $ 121,481 $ 120,998
Schedule of Principal Payments on Long-Term Debt	The schedule of principal payments on long-term debt as of September 30, 2021 is as follows: Year Amount (In thousands) 2021 remaining $ 953 2022 3,822 2023 23,039 2024 4,292 2025 5,624 Thereafter 86,482 Total $ 124,212

Accounts Payable and Other Li_2

Accounts Payable and Other Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Other Liabilities Disclosure [Abstract]
Schedule of Accounts Payable and Other Liabilities	Accounts payable and other liabilities consist of the following as of September 30, 2021 and December 31, 2020: Description September 30, 2021 December 31, 2020 (In thousands) Deferred ceding commission $ 41,621 $ 39,995 Outstanding claim checks — 10,864 Accounts payable and other payables 6,951 9,248 Accrued interest and issuance costs 592 833 Accrued dividends 1,680 1,670 Other liabilities 257 80 Premium tax 1,531 — Commission payables 14,404 18,245 Total other liabilities $ 67,036 $ 80,935

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Restricted Stock Activity	Restricted stock activity for the nine months ended September 30, 2021 is as follows: Number of shares Weighted-Average Grant-Date Fair Value per Share Non-vested, at December 31, 2020 100,267 $ 15.37 Granted - Performance-based restricted stock 123,890 10.49 Granted - Time-based restricted stock 61,945 10.49 Vested ( 26,294 ) 12.07 Canceled and surrendered ( 18,973 ) 13.04 Non-vested, at September 30, 2021 240,835 $ 12.15
Additional Information Regarding Outstanding Non-vested Time-based Restricted Stock and Performance-based Restricted Stock	Additional information regarding the Company’s outstanding non-vested time-based restricted stock and performance-based restricted stock at September 30, 2021 is as follows: Grant date Restricted shares unvested Share Value at Grant Date Per Share Remaining Restriction Period (Years) February 12, 2018 50,000 $ 16.35 1.25 April 24, 2020 5,000 $ 10.60 0.60 January 4, 2021 143,817 $ 10.43 2.25 April 13, 2021 42,018 $ 10.71 2.25 240,835

Investments - Schedule of Amort

Investments - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Debt Securities Available-for-Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	$ 661,396	$ 553,172
Debt Securities Available-for-sale, Gross Unrealized Gains	3,512	7,910
Debt Securities Available-for-sale, Gross Unrealized Losses	4,089	71
Available For Sale Securities Debt Securities	660,819	561,011
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	43,734	29,985
Debt Securities Available-for-sale, Gross Unrealized Gains	284	609
Debt Securities Available-for-sale, Gross Unrealized Losses	9	1
Available For Sale Securities Debt Securities	44,009	30,593
States, Municipalities and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	106,019	84,597
Debt Securities Available-for-sale, Gross Unrealized Gains	359	1,077
Debt Securities Available-for-sale, Gross Unrealized Losses	657	4
Available For Sale Securities Debt Securities	105,721	85,670
Special Revenue [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	311,752	271,194
Debt Securities Available-for-sale, Gross Unrealized Gains	1,624	3,154
Debt Securities Available-for-sale, Gross Unrealized Losses	1,881	27
Available For Sale Securities Debt Securities	311,495	274,321
Hybrid Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	99	100
Debt Securities Available-for-sale, Gross Unrealized Gains	1
Available For Sale Securities Debt Securities	100	100
Industrial and Miscellaneous [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	199,792	167,296
Debt Securities Available-for-sale, Gross Unrealized Gains	1,244	3,070
Debt Securities Available-for-sale, Gross Unrealized Losses	1,542	39
Available For Sale Securities Debt Securities	$ 199,494	$ 170,327

Investments - Schedule of Amo_2

Investments - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Debt Securities Available-for-Sale (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Carrying amount	$ 22.7	$ 21.6

Investments - Schedule of Net R

Investments - Schedule of Net Realized (Losses) Gains on Debt Securities Available-for-sale (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities Available-for-Sale
Total realized gains	$ 2	$ 20,355	$ 106	$ 20,492
Total realized losses	(8)		(10)	(115)
Net realized (losses) gains	(6)	20,355	96	20,377
Debt Securities Available-for-sale, Fair Value at Sale
Total realized gains, Fair Value at Sale	3,470	290,643	24,265	305,791
Total realized losses, Fair Value at Sale	226		1,043	2,716
Net realized gains (losses), Fair Value at Sale	$ 3,696	$ 290,643	$ 25,308	$ 308,507

Investments - Summary of Debt S

Investments - Summary of Debt Securities by Contractual Maturity Periods (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]
Maturity date Due in one year or less, Cost or Amortized Cost	$ 44,447
Maturity date Due after one year through five years, Cost or Amortized Cost	253,398
Maturity date Due after five years through ten years, Cost or Amortized Cost	220,450
Maturity date Due after ten years, Cost or Amortized Cost	143,101
Debt Securities Available-for-sale, Cost or Adjusted /Amortized Cost	$ 661,396	$ 553,172
Maturity date Due in one year or less, Percentage of Total	7.00%
Maturity date Due after one year through five years, Percentage of Total	38.00%
Maturity date Due after five years through ten years, Percentage of Total	33.00%
Maturity date Due after ten years, Percentage of Total	22.00%
Maturity date Total, Percentage	100.00%
Maturity date Due in one year or less, Fair Value	$ 44,628
Maturity date Due after one year through five years, Fair Value	254,377
Maturity date Due after five years through ten years, Fair Value	218,373
Maturity date Due after ten years, Fair Value	143,441
Maturity date Total, Fair Value	$ 660,819	$ 561,011
Maturity date Due in one year or less, Percentage of Total	7.00%
Maturity date Due after one year through five years, Percentage of Total	38.00%
Maturity date Due after five years through ten years, Percentage of Total	33.00%
Maturity date Due after ten years, Percentage of Total	22.00%
Maturity date Total, Percentage	100.00%

Investments - Summary of Net In

Investments - Summary of Net Investment Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	$ 2,517	$ 3,042	$ 6,337	$ 10,663
Less: Investment expenses	969	225	2,540	880
Net investment income, less investment expenses	1,548	2,817	3,797	9,783
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	1,986	2,170	5,164	8,567
Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	17	651	72	1,610
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	$ 514	$ 221	$ 1,101	$ 486

Investments - Schedule of Debt

Investments - Schedule of Debt Securities Available-for-Sale in an Unrealized Loss Position, Aggregate Fair Value (Detail) $ in Thousands	Sep. 30, 2021USD ($)Security	Dec. 31, 2020USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale Less Than Twelve Months, Number of Securities | Security	406	62
Debt Securities Available-for-sale Less Than Twelve Months, Gross Unrealized Losses	$ 4,085	$ 68
Debt Securities Available-for-sale Less Than Twelve Months, Fair Value	$ 331,410	$ 37,695
Debt Securities Available-for-sale Twelve Months or More, Number of Securities | Security	11,000	10,000
Debt Securities Available-for-sale Twelve Months or More, Gross Unrealized Losses	$ 4	$ 3
Debt Securities Available-for-sale Twelve Months or More, Fair Value	$ 101	$ 80
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale Less Than Twelve Months, Number of Securities | Security	10	3
Debt Securities Available-for-sale Less Than Twelve Months, Gross Unrealized Losses	$ 9	$ 1
Debt Securities Available-for-sale Less Than Twelve Months, Fair Value	$ 14,441	$ 73
Debt Securities Available-for-sale Twelve Months or More, Number of Securities | Security		1,000
Debt Securities Available-for-sale Twelve Months or More, Fair Value		$ 7
States, Municipalities and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale Less Than Twelve Months, Number of Securities | Security	75	6
Debt Securities Available-for-sale Less Than Twelve Months, Gross Unrealized Losses	$ 657	$ 4
Debt Securities Available-for-sale Less Than Twelve Months, Fair Value	$ 66,885	$ 5,158
Special Revenue [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale Less Than Twelve Months, Number of Securities | Security	188	27
Debt Securities Available-for-sale Less Than Twelve Months, Gross Unrealized Losses	$ 1,877	$ 24
Debt Securities Available-for-sale Less Than Twelve Months, Fair Value	$ 150,757	$ 16,439
Debt Securities Available-for-sale Twelve Months or More, Number of Securities | Security	11,000	9,000
Debt Securities Available-for-sale Twelve Months or More, Gross Unrealized Losses	$ 4	$ 3
Debt Securities Available-for-sale Twelve Months or More, Fair Value	$ 101	$ 73
Industrial and Miscellaneous [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities Available-for-sale Less Than Twelve Months, Number of Securities | Security	133	26
Debt Securities Available-for-sale Less Than Twelve Months, Gross Unrealized Losses	$ 1,542	$ 39
Debt Securities Available-for-sale Less Than Twelve Months, Fair Value	$ 99,327	$ 16,025

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($)	Apr. 01, 2024	Feb. 01, 2023	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Feb. 01, 2022	Jun. 01, 2021
Investments [Line Items]
Credit allowance for securities			$ 0			$ 0
Net realized and unrealized (losses) gains			$ (6,000)		$ 20,355,000	(926,000)	$ 20,377,000
Real Estate Investment Trust [Member]
Investments [Line Items]
Net realized and unrealized (losses) gains				$ 1,000,000
Carrying value of debt securities less impairment						3,000,000
REIT and LLCs [Member] | Preferred Units [Member]
Investments [Line Items]
Amortized cost									$ 7,500,000
Preferred units interest payments received						937,000	$ 353,000
Fixed principal payments received						$ 1,200,000
REIT and LLCs [Member] | Preferred Units [Member] | Scenario Forecast [Member]
Investments [Line Items]
Amortized cost								$ 9,900,000
Preferred Units Maturity Date	Apr. 1, 2024	Feb. 1, 2023

Investments - Summary of Carryi

Investments - Summary of Carrying Value and Maximum Loss Exposure of Company's Non-consolidated VIEs (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Carrying Value	$ 23,887	$ 26,409
Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Value	23,887	26,409
Maximum Loss Exposure	$ 24,909	$ 26,409

Fair Value of Financial Measure

Fair Value of Financial Measurements - Schedule of Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	$ 660,819	$ 561,011
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	366	371
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	660,453	560,640
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
U.S. government and agency securities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	44,009	30,593
U.S. government and agency securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	366	371
U.S. government and agency securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	43,643	30,222
U.S. government and agency securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
States, Municipalities and Political Subdivisions [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	105,721	85,670
States, Municipalities and Political Subdivisions [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
States, Municipalities and Political Subdivisions [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	105,721	85,670
States, Municipalities and Political Subdivisions [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
Special Revenue [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	311,495	274,321
Special Revenue [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
Special Revenue [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	311,495	274,321
Special Revenue [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
Hybrid Securities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	100	100
Hybrid Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
Hybrid Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	100	100
Hybrid Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
Industrial and Miscellaneous [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	199,494	170,327
Industrial and Miscellaneous [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	0	0
Industrial and Miscellaneous [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	199,494	170,327
Industrial and Miscellaneous [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt securities, available-for-sale	$ 0	$ 0

Fair Value of Financial Measu_2

Fair Value of Financial Measurements - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Nonrecurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Non-recurring fair value adjustments	$ 0	$ 0

Other Comprehensive (Loss) In_3

Other Comprehensive (Loss) Income - Summary of Other Comprehensive (Loss) Income and Tax Impact of Each Component of Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other comprehensive (loss) income
Change in unrealized (losses) gains on investments, net, Pre-tax	$ (1,344)	$ 2,480	$ (8,316)	$ 19,330
Reclassification adjustment of realized losses (gains) included in net income	6	(20,355)	(96)	(20,377)
Effect on other comprehensive (loss) income, Pre-tax	(1,338)	(17,875)	(8,412)	(1,047)
Change in unrealized (losses) gains on investments, net, Tax	311	(574)	1,928	(4,471)
Reclassification adjustment of realized gains included in net income, Tax	(1)	4,711	22	4,713
Effect on other comprehensive (loss) income, Tax	310	4,137	1,950	242
Change in unrealized (losses) gains on investments, net, After-tax	(1,033)	1,906	(6,388)	14,859
Reclassification adjustment of realized gains included in net income, After-tax	5	(15,644)	(74)	(15,664)
Effect on other comprehensive (loss) income, After-tax	$ (1,028)	$ (13,738)	$ (6,462)	$ (805)

Leases - Additional Information

Leases - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021
Lessee Lease Description [Line Items]
Lease renewal, Description	one or more options to renew
Minimum [Member]
Lessee Lease Description [Line Items]
Lease terms	1 year
Renewal terms of lease	2 years
Maximum [Member]
Lessee Lease Description [Line Items]
Lease terms	10 years
Renewal terms of lease	10 years

Leases - Components of Lease Co

Leases - Components of Lease Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Amortization of ROU assets - Finance leases	$ 647	$ 21	$ 1,321	$ 64
Interest on lease liabilities - Finance leases	263	5	524	16
Variable lease cost (cost excluded from lease payments)	112	128	373	391
Operating lease cost (cost resulting from lease payments)	339	340	1,018	1,023
Total lease cost	$ 1,361	$ 494	$ 3,236	$ 1,494

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information and Non-Cash Activity Related to Operating and Financing Leases (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Finance lease - Operating cash flows	$ 31	$ 16
Finance lease - Financing cash flows	100	55
Operating lease - Operating cash flows (fixed payments)	1,123	1,080
Operating lease - Operating cash flows (liability reduction)	$ 840	$ 761

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information Related to Operating and Financing Leases (Detail) $ in Thousands	Sep. 30, 2021USD ($)
Leases [Abstract]
Right-of-use lease assets - operating	$ 5,286
Right-of-use lease assets - finance	$ 23,366
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Right-of-use lease asset, net
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Right-of-use lease asset, net
Lease Liability - operating	$ 6,844
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Lease liability
Lease liability - finance	$ 25,120
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Lease liability

Leases - Weighted-Average Remai

Leases - Weighted-Average Remaining Lease Term and Discount Rate for Operating and Financing Leases (Detail)	Sep. 30, 2021
Leases [Abstract]
Weighted average lease term - Finance leases	9 years 4 months 2 days
Weighted average lease term - Operating leases	6 years 4 months 24 days
Weighted average discount rate - Finance leases	4.20%
Weighted average discount rate - Operating leases	5.30%

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities by Fiscal Year for Operating and Financing Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
2021 remaining	$ 1,142
2022	4,566
2023	4,500
2024	4,194
2025	3,970
Thereafter	20,213
Total lease payments	38,585
Less: imputed interest	6,621
Lessee Operating And Finance Lease Liability Present Value Of Net Minimum Payments, Total	$ 31,964	$ 8,155

Property and Equipment, Net - S

Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total, at cost	$ 30,853	$ 30,091
Less: accumulated depreciation and amortization	(12,903)	(11,406)
Property and equipment, net	17,950	18,685
Land [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	2,582	2,582
Building [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	10,141	10,141
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	7,147	6,358
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	2,038	2,027
Tenant and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	8,225	8,133
Vehicle Fleet [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	$ 720	$ 850

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)Building	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)aft²Building	Sep. 30, 2020USD ($)
Property Plant And Equipment Useful Life And Values [Abstract]
Depreciation and amortization expense | $	$ 736,000	$ 442,000	$ 1,600,000	$ 1,300,000
Number of acres of land purchased | a			15
Number of buildings | Building	5		5
Gross area of acquired property | ft²			191,200
Percentage of building in clearwater leased to unaffiliated tenants			75.00%

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 152,459		$ 152,459		$ 152,459
Intangibles, net	57,514		57,514		$ 62,277
Indefinite lived intangible, insurance licenses	1,300		1,300
Amortization of intangible assets	$ 1,600	$ 1,600	4,800	$ 4,800
Impairment of intangible assets			$ 0	$ 0
Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Useful life of intangible asset			15 years
Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Useful life of intangible asset			2 years 6 months

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 152,459
Goodwill acquired	0
Impairment	0
Ending balance	$ 152,459

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization of Intangible Assets (Details) $ in Thousands	Sep. 30, 2021USD ($)	[1]
Goodwill And Intangible Assets Disclosure [Abstract]
2021 - remaining	$ 1,588
2022	6,351
2023	6,351
2024	6,351
2025	6,315
Thereafter	29,243
Total	$ 56,199
[1]	Excludes insurance licenses valued at $ 1.3 million and classified as an indefinite lived intangible which is subject to annual impairment testing and not amortized.

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization of Intangible Assets (Parenthetical) (Details) $ in Millions	Sep. 30, 2021USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Indefinite lived intangible, insurance licenses	$ 1.3

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (EPS) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic (loss) earnings per share:
Net (loss) income attributable to common stockholders (000's)	$ (16,410)	$ (5,233)	$ (25,509)	$ 6,519
Weighted average shares outstanding	27,938,028	27,739,839	27,902,814	28,053,959
Basic	$ (0.59)	$ (0.19)	$ (0.91)	$ 0.23
Diluted (loss) earnings per share:
Net (loss) income attributable to common stockholders (000's)	$ (16,410)	$ (5,233)	$ (25,509)	$ 6,519
Weighted average shares outstanding	27,938,028	27,739,839	27,902,814	28,053,959
Weighted average dilutive shares				19,611
Total weighted average dilutive shares	27,938,028	27,739,839	27,902,814	28,073,570
Diluted	$ (0.59)	$ (0.19)	$ (0.91)	$ 0.23

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Antidilutive securities excluded from diluted earnings per share	2,677,355	1,819,503

Deferred Reinsurance Ceding C_3

Deferred Reinsurance Ceding Commission - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Policy Acquisition Costs [Member]
Deferred Reinsurance Ceding Commission [Line Items]
Ceding commission income	$ 12	$ 10.6	$ 35.2	$ 32.3
General and Administrative Expenses [Member]
Deferred Reinsurance Ceding Commission [Line Items]
Ceding commission income	$ 4	$ 3.5	$ 11.6	$ 10.6

Deferred Reinsurance Ceding C_4

Deferred Reinsurance Ceding Commission - Schedule of Activity with Regard to Deferred Reinsurance Ceding Commission (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Insurance [Abstract]
Beginning balance of deferred ceding commission income		$ 39,940	$ 34,562	$ 39,995	$ 37,464
Ceding commission deferred		17,659	17,294	48,447	43,213
Less: ceding commission earned		(15,978)	(14,129)	(46,821)	(42,950)
Ending balance of deferred ceding commission income	[1]	$ 41,621	$ 37,727	$ 41,621	$ 37,727
[1]	Deferred ceding commission income is classified in “Accounts payable and other liabilities” on the Company’s condensed consolidated balance sheet.

Deferred Policy Acquisition C_3

Deferred Policy Acquisition Costs - Summary of Activity in Deferred Policy Acquisition Costs (DPAC) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Insurance [Abstract]
Beginning Balance	$ 95,967	$ 81,590	$ 89,265	$ 77,211
Policy acquisition costs deferred	47,976	42,096	144,380	128,400
Amortization	(48,518)	(37,546)	(138,220)	(119,471)
Ending Balance	$ 95,425	$ 86,140	$ 95,425	$ 86,140

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Tax Expense Benefit	$ (1,117)	$ (1,500)	$ (5,644)	$ 2,784
Annual effective tax rate	6.40%	22.30%	18.10%	29.90%
Uncertain tax positions	$ 0		$ 0		$ 0

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Liability (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deferred tax assets:
Unearned premiums	$ 13,101	$ 15,303
Unearned commission	9,649	9,272
Net operating loss	1,880	1,885
Tax-related discount on loss reserve	3,809	3,322
Stock-based compensation	225	113
Accrued expenses	1,456	982
Leases	738	394
Unrealized losses	373	0
Other	719	343
Total deferred tax asset	31,950	31,614
Deferred tax liabilities:
Deferred acquisition costs	22,122	20,694
Prepaid expenses	184	236
Unrealized gains		1,814
Property and equipment	1,398	1,669
Note discount	203	326
Basis in purchased investments	37	53
Basis in purchased intangibles	14,652	15,693
Internal revenue code 481(a)-Accounting method change	5,361	8,577
Other	1,658	1,029
Total deferred tax liabilities	45,615	50,091
Net deferred tax liability	$ (13,665)	$ (18,477)

Reinsurance - Additional inform

Reinsurance - Additional information (Detail)	9 Months Ended
	Sep. 30, 2021
Catastrophe [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance premium, amortization period	12 months
Quota Share [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance premium, amortization period	12 months

Reinsurance - 2021-2022 Reinsur

Reinsurance - 2021-2022 Reinsurance Program - Catastrophe Excess of Loss Reinsurance - Additional information - (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable	$ 324,730	$ 161,918
FHCF [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance Retention Policy Reinsured Risk Percentage	90.00%
2021-2022 Excess of Loss Reinsurance Programs [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance purchase limit	$ 2,800,000
Reinsurance payable	312,000
2021-2022 Excess of Loss Reinsurance Programs [Member] | NBIC [Member] | First Catastrophe [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage	1,100,000
First event retention for insurance company subsidiary	20,700
2021-2022 Excess of Loss Reinsurance Programs [Member] | Heritage P&C [Member] | First Catastrophe [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage	1,430,000
First event retention for insurance company subsidiary	32,000
2021-2022 Excess of Loss Reinsurance Programs [Member] | Zephyr [Member] | First Catastrophe [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage	680,000
First event retention for insurance company subsidiary	$ 32,000
2021-2022 Excess of Loss Reinsurance Programs [Member] | Osprey [Member] | First Catastrophe [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance Retention Policy Reinsured Risk Percentage	100.00%

Reinsurance - 2021-2022 Reins_2

Reinsurance - 2021-2022 Reinsurance Program - Gross Quota and Net Quota Share Reinsurance - Additional information - (Detail) - NBIC [Member] - 2021-2022 Net Quota Share Reinsurance [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Net lines quota share occurrence limit	$ 20
Percentage of renewed ceded net premium and losses		56.50%	3.00%

Reinsurance - 2021-2022 Reins_3

Reinsurance - 2021-2022 Reinsurance Program - Aggregate Coverage - Additional information - (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)Reinsurer	Dec. 31, 2020
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Number of reinstatements available | Reinsurer	2
NBIC [Member] | 100.00% Aggregate Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit | $	$ 20
Excess retention amount reinsured | $	$ 20
Number of reinstatements available | Reinsurer	1
Aggregate contract expiration date	Dec. 31, 2021
Percentage of aggregate contract		100.00%

Reinsurance - 2021-2022 Reins_4

Reinsurance - 2021-2022 Reinsurance Program - Additional information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)Reinsurer	Sep. 30, 2021USD ($)Layer	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Unpaid losses and loss adjustment expenses	$ 636,146,000	$ 636,146,000	$ 625,979,000	$ 659,341,000	$ 662,997,000	$ 620,718,000	$ 613,533,000
Reinsurance payable	$ 324,730,000	324,730,000		$ 161,918,000
Number of reinstatements available | Reinsurer	2
Facultative Reinsurance [Member] | Minimum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Facultative reinsurance purchase amount	$ 10,000,000
Facultative Reinsurance [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable	10,000,000	$ 10,000,000
NBIC [Member] | General Excess of Loss 2021-2022 Reinsurance Program [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Number of layers in excess of retention loss | Layer		2
Retention under program to provide reinsurance coverage		$ 500,000
NBIC [Member] | General Excess of Loss 2021-2022 Reinsurance Program [Member] | First Layer Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage		250,000
Excess retention amount reinsured		500,000
NBIC [Member] | General Excess of Loss 2021-2022 Reinsurance Program [Member] | Second Layer Coverage for Property Losses [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage		2,750,000
Excess retention amount reinsured		750,000
NBIC [Member] | General Excess of Loss 2021-2022 Reinsurance Program [Member] | Casualty Losses for Second Layer [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage		1,250,000
Excess retention amount reinsured		750,000
NBIC [Member] | Facultative 2021 - 2022 Excess of Loss Reinsurance Program [Member] | Minimum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable	$ 3,500,000	3,500,000
Commercial Residential Losses [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Number of reinstatements available | Reinsurer	2
Insurance Claims [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Unpaid losses and loss adjustment expenses	$ 1,000,000	1,000,000
Insurance Claims [Member] | Commercial Residential Losses [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Unpaid losses and loss adjustment expenses	750,000	750,000
Property Per Risk Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Coverage limit	9,000,000
Reinsurance payable	27,000,000	27,000,000
Property Per Risk Coverage [Member] | Commercial Residential Losses [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Coverage limit	250,000
Reinsurance payable	$ 750,000	$ 750,000

Reinsurance - Schedule of Effec

Reinsurance - Schedule of Effect of Reinsurance Arrangements in Consolidated Statement of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Premiums Written
Premiums Written, Direct	$ 274,178	$ 278,242	$ 886,059	$ 797,776
Premiums Written, Ceded	(53,505)	(63,493)	(491,677)	(422,092)
Premiums Written, Net	220,673	214,749	394,382	375,684
Premiums Earned
Premiums Earned, Direct	294,409	254,982	850,466	731,489
Premiums Earned, Ceded	(131,964)	(116,752)	(399,323)	(338,197)
Net premiums earned	162,445	138,230	451,143	393,292
Losses and Loss Adjustment Expenses
Losses and Loss Adjustment Expenses, Direct	195,099	205,337	483,382	452,014
Losses and Loss Adjustment Expenses, Ceded	(65,467)	(85,619)	(155,006)	(185,245)
Losses and Loss Adjustment Expenses, Net	$ 129,632	$ 119,718	$ 328,376	$ 266,769

Reserve for Unpaid Losses - Sum

Reserve for Unpaid Losses - Summary of Reserve for Unpaid Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Insurance [Abstract]
Balance, beginning of period	$ 625,979	$ 620,718	$ 659,341	$ 613,533
Less: reinsurance recoverable on unpaid losses	366,879	404,370	397,688	393,630
Net balance, beginning of period	259,100	216,348	261,653	219,903
Incurred related to:
Current year	130,425	125,544	331,374	281,698
Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense	(793)	(5,826)	(2,998)	(14,929)
Total incurred	129,632	119,718	328,376	266,769
Paid related to:
Current year	75,508	71,955	171,128	148,563
Prior years	27,273	18,371	132,950	92,369
Total paid	102,781	90,326	304,078	240,932
Net balance, end of period	285,951	245,740	285,951	245,740
Plus: reinsurance recoverable on unpaid losses	350,195	417,257	350,195	417,257
Balance, end of period	$ 636,146	$ 662,997	$ 636,146	$ 662,997

Reserve for Unpaid Losses - Add

Reserve for Unpaid Losses - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Insurance [Abstract]
Unpaid losses and loss adjustment expenses	$ 285,951	$ 259,100	$ 261,653	$ 245,740	$ 216,348	$ 219,903
Unpaid losses and loss adjustment expenses attributable to IBNR net of reinsurance recoverable	$ 213,500
Net reserves for unpaid losses and loss adjustment expenses, percentage	74.70%

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	Jul. 28, 2021	Jul. 27, 2021	Mar. 31, 2021	Dec. 31, 2018	Oct. 31, 2017	Sep. 30, 2021	Sep. 30, 2020	Jun. 01, 2021	Dec. 31, 2020	Apr. 27, 2020	Sep. 30, 2017
Debt Instrument [Line Items]
Long-term debt, net						$ 121,481,000			$ 120,998,000
Issuance and debt discount costs						2,731,000			3,442,000
Payout dividends, aggregate amount						5,029,000	$ 5,169,000
Maximum [Member]
Debt Instrument [Line Items]
Payout dividends, aggregate amount						10,000,000
Federal Home Loan Bank Of Atlanta [Member]
Debt Instrument [Line Items]
Interest paid						450,500	457,100
FHLB advance Interest rate				3.094%
Cash loan received under advance from FHLB				$ 19,200,000
Required fair value of reinvestment in FHLB common stock.				$ 1,400,000		1,200,000
Estimated fair value of collateral with FHLB						22,700,000
Federal Home Loan Bank Des Moines [Member]
Debt Instrument [Line Items]
Required fair value of reinvestment in FHLB common stock.						215,900			215,900
Federal Home Loan Bank Boston [Member]
Debt Instrument [Line Items]
Required fair value of reinvestment in FHLB common stock.						$ 222,900			222,900
Standby Letters of Credit [Member] | Regions Bank [Member]
Debt Instrument [Line Items]
Repayment of line of credit			$ 31,500,000
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount											$ 136,800,000
Interest rate											5.875%
Notes maturity date						Aug. 1, 2037
Interest payments term						Interest is payable semi-annually in arrears, on February 1, and August 1 of each year.
Long-term debt, net						$ 22,700,000
Issuance and debt discount costs						716,900
Interest paid						$ 1,300,000	1,300,000
Loan or advance maturity date						Aug. 1, 2037
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Notes maturity period				5 years
Maximum borrowing capacity				$ 125,000,000
Senior Secured Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio		2.00%
Senior Secured Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio		3.00%
Senior Secured Credit Facility [Member] | Second Amendment [Member]
Debt Instrument [Line Items]
Covenant description						The Second Amendment modified the negative covenants in the Credit Agreement to permit the Company to make acquisitions and investments if, after giving effect to the acquisition or investment, either (1) the Company has an aggregate of $25.0 million in cash and availability under the revolving credit facility or (2) the consolidated leverage ratio under the Credit Agreement is at least a quarter turn less than the required ratio for the trailing four quarters.
Senior Secured Credit Facility [Member] | Credit Agreement Fifth Amendment [Member]
Debt Instrument [Line Items]
Credit agreement range percentage description						reduce the applicable margin for loans under the Credit Agreement to 2.5% to 3.0% per annum for LIBOR loans (reduced from the prior range of 3.25% to 3.75%) and 1.5% to 2.0% per annum for base rate loans (reduced from the prior range of 2.25% to 2.75%)
Leverage ratio description						in each case based on a consolidated leverage ratio ranging from less than or equal to 1.25-to-1 to greater than 2.25-to-1 (previously less than or equal to 2.0-to-1 to greater than 3.0-to-1)
Senior Secured Credit Facility [Member] | Credit Agreement Fifth Amendment [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit agreement loans margin percentage	3.00%
Base rate loan percentage	3.75%
Base rate loan reduction percentage	2.75%
Consolidated leverage ratio	1.25%
Senior Secured Credit Facility [Member] | Credit Agreement Fifth Amendment [Member] | Minimum [Member]
Debt Instrument [Line Items]
Credit agreement loans margin percentage	2.50%
Base rate loan percentage	3.25%
Base rate loan reduction percentage	2.25%
Consolidated leverage ratio	2.25%
Senior Secured Credit Facility [Member] | Credit Agreement Fifth Amendment [Member] | London Interbank Offered Rate L I B O R [Member] | Maximum [Member]
Debt Instrument [Line Items]
LIBOR loans percentage	3.00%
Senior Secured Credit Facility [Member] | Credit Agreement Fifth Amendment [Member] | London Interbank Offered Rate L I B O R [Member] | Minimum [Member]
Debt Instrument [Line Items]
LIBOR loans percentage	2.50%
Senior Secured Credit Facility [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount		$ 56,300,000							60,000,000
Interest paid						$ 1,500,000	2,100,000
Maximum borrowing capacity				75,000,000
Effective interest rate						2.87%
Senior Secured Credit Facility [Member] | Term Loan Facility [Member] | Credit Agreement Fifth Amendment [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 70,000,000
Term loan, Increase in the period	13,750,000
Maximum borrowing capacity		75,000,000
Line of credit facility, advance amount	13,750,000
Senior Secured Credit Facility [Member] | Term Loan Facility [Member] | Term Loan Payable Prior to July 29, 2021 [Member] | Credit Agreement Fifth Amendment [Member]
Debt Instrument [Line Items]
Term loan, Quarterly principal payments	1,900,000
Senior Secured Credit Facility [Member] | Term Loan Facility [Member] | Term Loan Payable in December 2021 [Member] | Credit Agreement Fifth Amendment [Member]
Debt Instrument [Line Items]
Term loan, Quarterly principal payments	875,000
Senior Secured Credit Facility [Member] | Term Loan Facility [Member] | Term Loan Payable After December 2021 [Member] | Credit Agreement Fifth Amendment [Member]
Debt Instrument [Line Items]
Term loan, Quarterly principal payments	1,300,000
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest paid						$ 196,500	451,500
Maximum borrowing capacity				$ 50,000,000
Outstanding borrowing capacity amount						0			10,000,000
Letters of credit outstanding amount						$ 0			$ 0
Effective interest rate						2.87%
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member] | Second Amendment [Member]
Debt Instrument [Line Items]
Aggregate availability amount										$ 25,000,000
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member] | Credit Agreement Fifth Amendment [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	75,000,000	$ 50,000,000
Repayment of line of credit	$ 10,000,000
Senior Secured Credit Facility [Member] | Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 5,000,000		$ 5,000,000
Senior Secured Credit Facility [Member] | Standby Letters of Credit [Member] | Third Amendment [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 40,000,000
Senior Secured Credit Facility [Member] | Swingline Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 10,000,000
Collateral Financial Arrangement [Member] | Skye Lane Properties LLC [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Aggregate principal amount					$ 12,700,000
Interest rate					4.95%
Notes maturity date					Oct. 30, 2027
Frequency of periodic principal and interest payments						monthly
Loan or advance maturity date					Oct. 30, 2027
Payment of principal and interest						$ 670,000	$ 670,000
Collateral Financial Arrangement [Member] | Skye Lane Properties LLC [Member] | Mortgage Loan [Member] | 5-year Treasury Security [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					3.10%

Long-Term Debt - Schedule of Co

Long-Term Debt - Schedule of Company's Debt and Credit Facilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal amount	$ 124,212	$ 124,440
Less: unamortized discount and issuance costs	2,731	3,442
Total long-term debt	121,481	120,998
Term Loan Facility [Member]
Debt Instrument [Line Items]
Principal amount	70,000	60,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	0	10,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Principal amount	23,413	23,413
FHLB Loan Agreement [Member]
Debt Instrument [Line Items]
Principal amount	19,200	19,200
Mortgage Loan [Member]
Debt Instrument [Line Items]
Principal amount	$ 11,599	$ 11,827

Long-Term Debt - Schedule of Pr

Long-Term Debt - Schedule of Principal Payments on Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
2021 remaining	$ 953
2022	3,822
2023	23,039
2024	4,292
2025	5,624
Thereafter	86,482
Total	$ 124,212	$ 124,440

Accounts Payable and Other Li_3

Accounts Payable and Other Liabilities - Schedule of Accounts Payable and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Deferred ceding commission	$ 41,621	$ 39,995
Outstanding claim checks	0	10,864
Accounts payable and other payables	6,951	9,248
Accrued interest and issuance costs	592	833
Accrued dividends	1,680	1,670
Other liabilities	257	80
Premium tax	1,531	0
Commission payables	14,404	18,245
Total other liabilities	$ 67,036	$ 80,935

Statutory Accounting and Regu_2

Statutory Accounting and Regulations - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Heritage P&C [Member]
Statutory Accounting Practices [Line Items]
Statutory accounting practices, capital and surplus requirements of insurance subsidiary	greater of $15 million or 10% of their respective liabilities.
Minimum required amount of capital and surplus maintained by the insurance subsidiary	$ 15,000,000
Statutory capital and surplus requirements, percentage	10.00%
Zephyr [Member]
Statutory Accounting Practices [Line Items]
Deposits held	$ 750,000
NBIC [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	3,000,000
Heritage P&C, Zephyr, NBIC and PIC [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	$ 290,000,000	$ 333,300,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Comegys Insurance Agency, Inc. [Member]
Related Party Transaction [Line Items]
Agency commission	$ 53,900	$ 595,700	$ 46,300	$ 592,400

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Defined Contribution Plan Disclosure [Line Items]
Contribution for participating employees	$ 293,000	$ 265,000	$ 985,000	$ 897,000
Defined Contribution Plan, Plan Name			401(k)
Medical premium cost	1,600,000	$ 941,000	$ 2,600,000	$ 3,000,000
Additional liability for unpaid claims	$ 442,000		$ 442,000		$ 1,400,000
Maximum [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of contribution on employee salary			4.00%
First 3% of Employees [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of contribution on employee salary			100.00%
Next 2% of the Employees [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of contribution on employee salary			50.00%

Equity - Additional Information

Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Aug. 05, 2021	May 05, 2021	Mar. 03, 2021	Nov. 02, 2020	Aug. 01, 2019	Sep. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Common stock, shares authorized						50,000,000			50,000,000	50,000,000
Preferred stock, shares authorized						5,000,000			5,000,000
Common stock, shares outstanding						27,802,626			27,802,626	27,748,606
Treasury stock, shares						9,427,948			9,427,948	9,279,839
Additional paid-in capital						$ 332,562			$ 332,562	$ 331,867
Common stock voting rights									one vote
Stock repurchase program, authorized amount				$ 23,800	$ 50,000	49,000			$ 49,000
Stock repurchase program, expiration date				Dec. 31, 2020	Dec. 31, 2020				Dec. 31, 2021
Treasury shares repurchased, shares									148,109	2,065,042
Treasury shares repurchased, value						$ 1,005	$ 2,011	$ 7,986	$ 1,000	$ 26,200
Cash dividend per common share	$ 0.06	$ 0.06	$ 0.06
Cash dividend, payable date	Oct. 6, 2021	Jul. 6, 2021	Apr. 6, 2021
Dividend payable, record date	Sep. 15, 2021	Jun. 15, 2021	Mar. 15, 2021
Restricted Stock [Member]
Class Of Stock [Line Items]
Unvested restricted common stock issued						240,835			240,835	100,267

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 22, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum tenure of stock option from the date of grant					10 years
Unrecognized expense related to non-vested stock				$ 1,600,000		$ 1,600,000
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					1 year
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					5 years
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 320,000			$ 1,400,000	$ 867,000	$ 4,100,000
Restricted stock vested and released					40,267	35,267
Shares withheld to cover withholding taxes					18,973	22,223
Shares withheld to cover withholding taxes, value					$ 171,000,000	$ 297,000,000
Restricted Stock [Member] | Employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					5 years
Restricted Stock [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					1 year
Restricted Stock [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					5 years
Performance-Based Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized expense related to non-vested stock	1,100,000				$ 1,100,000
Time-Based Non-Vested Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized expense related to non-vested stock	$ 1,000,000				$ 1,000,000
Omnibus Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance										2,981,737
Shares available for grant	939,691				939,691
Omnibus Incentive Plan [Member] | Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested restricted shares issued		28,012	95,878
Grant date fair value per share		$ 10.71	$ 10.43
Vesting period		3 years	3 years
Omnibus Incentive Plan [Member] | Time-Based Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested restricted shares issued		14,006	47,939
Grant date fair value per share		$ 10.71	$ 10.43
Omnibus Incentive Plan [Member] | Time-Based Shares [Member] | Scenario Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vesting in equal instalments							15,980	15,980	15,979
Omnibus Incentive Plan [Member] | Time-Based Shares [Member] | Scenario Forecast [Member] | Chief Financial Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vesting in equal instalments							4,669	4,669	4,668

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Restricted Stock Activity (Detail) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance, Number of shares | shares	100,267
Vested, Number of shares | shares	(26,294)
Canceled and surrendered, Number of shares | shares	(18,973)
Ending balance, Number of shares | shares	240,835
Beginning balance, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 15.37
Vested, Weighted-Average Grant-Date Fair Value per Share | $ / shares	12.07
Canceled and surrendered, Weighted-Average Grant-Date Fair Value per Share | $ / shares	13.04
Ending balance, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 12.15
Performance-Based Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted, Number of shares | shares	123,890
Granted, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 10.49
Time-Based Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted, Number of shares | shares	61,945
Granted, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 10.49

Stock-Based Compensation - Ad_2

Stock-Based Compensation - Additional Information Regarding Outstanding Non-vested Time-based Restricted Stock and Performance-based Restricted Stock (Details) - Restricted Stock [Member] - $ / shares	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested restricted common stock issued	240,835	100,267
February 12, 2018 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant date	Feb. 12, 2018
Unvested restricted common stock issued	50,000
Share Value at Grant Date Per Share	$ 16.35
Remaining Restriction Period (Years)	1 year 3 months
April 24, 2020 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant date	Apr. 24, 2020
Unvested restricted common stock issued	5,000
Share Value at Grant Date Per Share	$ 10.60
Remaining Restriction Period (Years)	7 months 6 days
January 4, 2021 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant date	Jan. 4, 2021
Unvested restricted common stock issued	143,817
Share Value at Grant Date Per Share	$ 10.43
Remaining Restriction Period (Years)	2 years 3 months
April 13, 2021 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant date	Apr. 13, 2021
Unvested restricted common stock issued	42,018
Share Value at Grant Date Per Share	$ 10.71
Remaining Restriction Period (Years)	2 years 3 months

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - $ / shares	Nov. 04, 2021	Aug. 05, 2021	May 05, 2021	Mar. 03, 2021
Subsequent Event [Line Items]
Cash dividend per common share		$ 0.06	$ 0.06	$ 0.06
Cash dividend, payable date		Oct. 6, 2021	Jul. 6, 2021	Apr. 6, 2021
Dividend payable, record date		Sep. 15, 2021	Jun. 15, 2021	Mar. 15, 2021
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividend, declared date	Nov. 4, 2021
Cash dividend per common share	$ 0.06
Cash dividend, payable date	Jan. 6, 2022
Dividend payable, record date	Dec. 15, 2021