Heritage Insurance (HRTG) 10-Q 6 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 04, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
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	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		29,534,375
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, 2019	Dec. 31, 2018
ASSETS
Fixed maturities, available-for-sale, at fair value (amortized cost of $604,821 and $518,391)	$ 616,084	$ 509,649
Federal Home Loan Bank (FHLB) stock, at cost	1,618	1,422
Equity securities, at fair value, (cost $18,698)		15,034
Other investments	27,372	2,488
Total investments	645,074	528,593
Cash and cash equivalents	229,996	250,117
Restricted cash	13,789	12,253
Accrued investment income	4,665	4,468
Premiums receivable, net	58,115	57,000
Reinsurance recoverable on paid and unpaid claims	274,116	317,930
Prepaid reinsurance premiums	270,645	233,071
Income taxes receivable	10,611	35,586
Deferred policy acquisition costs, net	75,613	73,055
Property and equipment, net	20,873	17,998
Intangibles, net	70,569	76,850
Goodwill	152,459	152,459
Other assets	16,354	9,333
Total Assets	1,842,879	1,768,713
LIABILITIES AND STOCKHOLDERS' EQUITY
Unpaid losses and loss adjustment expenses	417,586	432,359
Unearned premiums	484,849	472,357
Reinsurance payable	254,152	166,975
Long-term debt, net	130,849	148,794
Deferred income tax, net	14,278	7,705
Advance premiums	21,244	20,000
Accrued compensation	8,263	9,226
Accounts payable and other liabilities	66,428	85,964
Total Liabilities	1,397,649	1,343,380
Commitments and contingencies (Note 17)
Stockholders’ Equity:
Common stock, $0.0001 par value, 50,000,000 shares authorized, 29,534,375 shares issued and 28,963,841 shares outstanding at September 30, 2019; 30,083,559 shares issued and 29,477,756 shares outstanding at December 31, 2018	3	3
Additional paid-in capital	331,558	325,292
Accumulated other comprehensive income (loss)	8,550	(6,527)
Treasury stock, at cost, 8,036,560 and 7,214,797 shares, respectively	(101,078)	(89,185)
Retained earnings	206,197	195,750
Total Stockholders' Equity	445,230	425,333
Total Liabilities and Stockholders' Equity	$ 1,842,879	$ 1,768,713

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Fixed maturities, at amortized cost	$ 604,821	$ 518,391
Equity securities, cost		$ 18,698
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	29,534,375	30,083,559
Common stock, shares outstanding	28,963,841	29,477,756
Treasury stock, shares	8,036,560	7,214,797

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Other Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUES:
Gross premiums written	$ 237,303	$ 233,613	$ 702,491	$ 701,643
Change in gross unearned premiums	(5,686)	551	(12,326)	(9,345)
Gross premiums earned	231,617	234,164	690,165	692,298
Ceded premiums	(107,755)	(115,926)	(342,529)	(356,748)
Net premiums earned	123,862	118,238	347,636	335,550
Net investment income	3,655	3,847	11,157	9,704
Net realized and unrealized gains (losses)	805	(123)	3,132	(1,234)
Other revenue	3,377	3,333	10,878	11,273
Total revenues	131,699	125,295	372,803	355,293
EXPENSES:
Losses and loss adjustment expenses	70,052	58,695	206,490	177,775
Policy acquisition costs, net of ceding commission income for the three and nine months ended September 30, 2019 of $11.3 million and $36.8 million, respectively	26,686	26,569	79,793	58,167
General and administrative expenses, net of ceding commission income for the three and nine months ended September 30, 2019 of $3.7 million and $12 million, respectively	21,477	25,815	58,465	72,167
Total expenses	118,215	111,079	344,748	308,109
Operating income	13,484	14,216	28,055	47,184
Interest expense, net	2,401	5,225	6,502	15,431
Other non-operating (income)/loss, net			48	(542)
Income before income taxes	11,083	8,991	21,505	32,295
Provision for income taxes	2,950	3,002	5,687	9,068
Net income	8,133	5,989	15,818	23,227
OTHER COMPREHENSIVE INCOME
Change in net unrealized gains (losses) on investments	4,429	(2,895)	19,533	(9,918)
Reclassification adjustment for net realized investment losses	(103)	(5)	291	307
Income tax (expense) benefit related to items of other comprehensive income	(1,035)	1,665	(4,747)	3,249
Total comprehensive income	$ 11,424	$ 4,754	$ 30,895	$ 16,865
Weighted average shares outstanding
Basic	29,109,962	25,631,871	29,329,742	25,663,415
Diluted	29,168,392	26,046,938	29,352,756	26,340,759
Earnings per share
Basic	$ 0.28	$ 0.23	$ 0.54	$ 0.91
Diluted	$ 0.28	$ 0.23	$ 0.54	$ 0.88

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Operations and Other Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Ceding commission income	$ 15,062	$ 48,828
Policy Acquisition Costs [Member]
Ceding commission income	11,300	36,800
General and Administrative Expenses [Member]
Ceding commission income	$ 3,700	$ 12,000

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Shares Issued [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Shares [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]
Beginning Balance at Dec. 31, 2017	$ 379,816	$ 3	$ 294,836	$ 175,226	$ (87,185)	$ (3,064)
Beginning Balance, Shares at Dec. 31, 2017		25,885,006
Cumulative effective of change in accounting principle (ASU 2016-01), net of tax at Dec. 31, 2017				(267)		267
Beginning balance as adjusted at Dec. 31, 2017	379,816	$ 3	294,836	174,959	(87,185)	(2,797)
Net unrealized change in investments, net of tax	(4,428)					(4,428)
Stock buy-back	(2,000)				(2,000)
Stock buy-back, Shares		(115,200)
Stock-based compensation	1,306		1,306
Reclassification of income taxes upon early adoption of ASU 2018-02				424		(424)
APIC deferred tax adj	970		970
Dividends declared on common stock	(1,601)			(1,601)
Net income	14,830			14,830
Ending balance at Mar. 31, 2018	388,893	$ 3	297,112	188,612	(89,185)	(7,649)
Ending balance, Shares at Mar. 31, 2018		25,769,806
Beginning Balance at Dec. 31, 2017	379,816	$ 3	294,836	175,226	(87,185)	(3,064)
Beginning Balance, Shares at Dec. 31, 2017		25,885,006
Cumulative effective of change in accounting principle (ASU 2016-01), net of tax at Dec. 31, 2017				(267)		267
Beginning balance as adjusted at Dec. 31, 2017	379,816	$ 3	294,836	174,959	(87,185)	(2,797)
Net income	23,227
Ending balance at Sep. 30, 2018	390,556	$ 3	295,500	193,821	(89,185)	(9,583)
Ending balance, Shares at Sep. 30, 2018		25,769,806
Beginning Balance at Mar. 31, 2018	388,893	$ 3	297,112	188,612	(89,185)	(7,649)
Beginning Balance, Shares at Mar. 31, 2018		25,769,806
Net unrealized change in investments, net of tax	(699)					(699)
Stock-based compensation on vested restricted stock	1,306		1,306
Convertible Option debt extinguishment, net of tax	(4,235)		(4,235)
Dividends declared on common stock	(1,593)			(1,593)
Net income	2,408			2,408
Ending balance at Jun. 30, 2018	386,080	$ 3	294,183	189,427	(89,185)	(8,348)
Ending balance, Shares at Jun. 30, 2018		25,769,806
Net unrealized change in investments, net of tax	(1,235)					(1,235)
Stock-based compensation on vested restricted stock	1,317		1,317
Dividends declared on common stock	(1,595)			(1,595)
Net income	5,989			5,989
Ending balance at Sep. 30, 2018	390,556	$ 3	295,500	193,821	(89,185)	(9,583)
Ending balance, Shares at Sep. 30, 2018		25,769,806
Beginning Balance at Dec. 31, 2018	425,333	$ 3	325,292	195,750	(89,185)	(6,527)
Beginning Balance, Shares at Dec. 31, 2018		29,477,756
Net unrealized change in investments, net of tax	5,963					5,963
Restricted stock vested, net of surrendered shares	(118)		(118)
Restricted stock vested, net of surrendered shares, Shares		17,000
Stock-based compensation on vested restricted stock	1,345		1,345
Convertible Option debt extinguishment, net of tax	(1,840)		(1,840)
Stock issued on convertible note conversion	4,210		4,210
Stock issued on convertible note conversion, Shares		285,201
Stock buy-back	(5,011)				(5,011)
Stock buy-back, Shares		(347,740)
Tax rate change	48		48
Dividends declared on common stock	(1,807)			(1,807)
Net income	6,964			6,964
Ending balance at Mar. 31, 2019	435,087	$ 3	328,937	200,907	(94,196)	(564)
Ending balance, Shares at Mar. 31, 2019		29,432,217
Beginning Balance at Dec. 31, 2018	425,333	$ 3	325,292	195,750	(89,185)	(6,527)
Beginning Balance, Shares at Dec. 31, 2018		29,477,756
Net income	15,818
Ending balance at Sep. 30, 2019	445,230	$ 3	331,558	206,197	(101,078)	8,550
Ending balance, Shares at Sep. 30, 2019		28,963,841
Beginning Balance at Mar. 31, 2019	435,087	$ 3	328,937	200,907	(94,196)	(564)
Beginning Balance, Shares at Mar. 31, 2019		29,432,217
Net unrealized change in investments, net of tax	5,823					5,823
Stock-based compensation on vested restricted stock	1,344		1,344
Stock buy-back	(2,333)				(2,333)
Stock buy-back, Shares		(157,640)
Dividends declared on common stock	(1,792)			(1,792)
Net income	721			721
Ending balance at Jun. 30, 2019	438,850	$ 3	330,281	199,836	(96,529)	5,259
Ending balance, Shares at Jun. 30, 2019		29,274,577
Net unrealized change in investments, net of tax	3,291					3,291
Restricted stock vested, net of surrendered shares	(68)		(68)
Restricted stock vested, net of surrendered shares, Shares		5,647
Stock-based compensation on vested restricted stock	1,345		1,345
Stock buy-back	$ (4,549)				(4,549)
Stock buy-back, Shares	(316,383)	(316,383)
Dividends declared on common stock	$ (1,772)			(1,772)
Net income	8,133			8,133
Ending balance at Sep. 30, 2019	$ 445,230	$ 3	$ 331,558	$ 206,197	$ (101,078)	$ 8,550
Ending balance, Shares at Sep. 30, 2019		28,963,841

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
OPERATING ACTIVITIES
Net income	$ 15,818,000	$ 23,227,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation	4,034,000	3,929,000
Bond amortization and accretion	3,896,000	4,935,000
Amortization of original issuance discount on debt	1,073,000	3,188,000
Depreciation and amortization	8,274,000	21,408,000
Net realized losses	291,000	307,000
Net unrealized investment gains	(3,423,000)
Net (gain)/loss from repurchase of debt	48,000	(542,000)
Deferred income taxes	185,000	(17,301,000)
Changes in operating assets and liabilities:
Accrued investment income	(197,000)	1,304,000
Premiums receivable, net	(1,115,000)	(1,332,000)
Prepaid reinsurance premiums	(37,574,000)	(54,885,000)
Reinsurance recoverable on paid and unpaid claims	43,814,000	32,531,000
Income taxes receivable	24,975,000	1,089,000
Deferred policy acquisition costs, net	(2,558,000)	(34,024,000)
Other assets	(7,021,000)	4,698,000
Unpaid losses and loss adjustment expenses	(14,773,000)	(48,988,000)
Unearned premiums	12,492,000	9,346,000
Reinsurance payable	87,177,000	199,445,000
Accrued interest	176,000	(757,000)
Accrued compensation	(963,000)	(5,991,000)
Advance premiums	1,244,000	9,787,000
Income taxes payable	(8,196,000)
Other liabilities	(11,524,000)	(91,031,000)
Net cash provided by operating activities	116,153,000	60,343,000
INVESTING ACTIVITIES
Fixed maturity securities sales, maturities and paydowns	106,830,000	228,457,000
Fixed maturity securities purchases	(200,540,000)	(208,303,000)
Equity securities sales	26,521,000	4,209,000
Equity securities purchases	(4,583,000)	(3,804,000)
Limited partnership interest	(24,006,000)
Proceeds from sale of assets	65,000
Cost of property and equipment acquired	(4,933,000)	(1,425,000)
Net cash (used in) provided by investing activities	(100,646,000)	19,134,000
FINANCING ACTIVITIES
Repayment of term note	(13,750,000)
Mortgage loan payments	(206,000)	(196,000)
Repurchase of convertible notes	(2,869,000)	(13,248,000)
Purchase of treasury stock	(11,893,000)	(2,000,000)
Tax withholdings on share-based compensation awards	(186,000)
Dividends paid	(5,188,000)	(4,789,000)
Net cash used in financing activities	(34,092,000)	(20,233,000)
(Decrease) increase in cash, cash equivalents, and restricted cash	(18,585,000)	59,244,000
Cash, cash equivalents and restricted cash, beginning of period	262,370,000	174,530,000
Cash, cash equivalents and restricted cash, end of period	243,785,000	233,774,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Income taxes paid	13,849,000	25,267,000
Interest paid	5,206,000	$ 14,265,000
Issuance of shares on conversion of convertible notes	$ 4,210,000

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 229,996	$ 250,117
Restricted cash	13,789	12,253
Total	$ 243,785	$ 262,370	$ 233,774	$ 174,530

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
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, 2018 (the “ 2018 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 2018 Annual Report on Form 10-K. We include herein certain updates to those policies. Leases At the inception of a contract, we assess whether the contract is, or contains, a lease. The assessment is based on (1) whether the contract involves the use of distinct identified assets, (2) whether the Company obtains the right to substantially all the economic benefit from the use of the asset throughout the period, and (3) whether the Company has the right to direct the use of the asset. All significant lease arrangements are generally recognized at lease commencement. A right of use (“ROU”) asset and corresponding lease liability are not recorded for leases with an initial term of 12 months or less (short term leases) and we recognize lease expense for these leases as incurred over the lease term. ROU assets represent our right to use an underlying asset during the reasonably certain lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Our lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise the option. Operating lease ROU assets and liabilities are recognized based on the present value of lease payments not yet paid. Lease payments may be fixed or variable, however, only fixed payments or in-substance fixed payments are included in determining the lease liability. Variable lease payments are recognized in operating expenses in the period in which the obligation for those payments are incurred. The operating lease ROU asset also includes any lease payments related to initial direct cost and prepayments and excludes lease incentives. Lease expense is recognized on a straight-line basis over the term of the lease. We have lease agreements with lease and non-lease components, which are generally accounted for separately. We primarily use our incremental borrowing rates for our operating leases (rates are not readily determinable) and implicit rates for our financing leases in determining the present value of lease payments. In the first quarter of 2019, the Company adopted ASU 2016 -02 and did not recognize an opening adjustment to retained earnings as a result of the adoption of FASB 842. Refer to Note 5-Leases herein for further information. Reclassification Certain prior year amounts have been reclassified to conform to the current year presentation. Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases We adopted the guidance prospectively during the first quarter of 2019. As part of our adoption, we elected not to reassess historical lease classification or recognize short-term leases on our balance sheet. At implementation, we recorded approximately $2.8 million as right-of-use operating and financing We did not recognize an opening adjustment to retained earnings. Note 5 Accounting Pronouncements Not Yet Adopted In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments Financial Instruments-Overall Recognition and Measurement of Financial Assets and Financial Liabilities FASB ASU 2016-13 Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments The Company’s implementation activities, which remain in process, include the development of models, methodologies, data input and assumptions to be used in estimating expected credit losses. The implementation primarily impacts the Company’s debt securities and reinsurance recoverable balances. The adoption of this standard is not expected to be material to our financial position, results of operations or cash flows. For information regarding other accounting standards that the Company has not yet adopted, refer to our Annual Report on Form 10-K, filed on March 12, 2019, the section of Note 1 of the notes to the consolidated financial statements entitled the “Accounting Pronouncement Not Yet Adopted”.

Investments

Investments	9 Months Ended
	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Investments	NOTE 2. INVESTMENTS Securities Available-for-Sale The following table details the difference between cost or adjusted/amortized cost and estimated fair value, by major investment category, at September 30, 2019 and December 31, 2018: September 30, 2019 Cost or Adjusted / Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities (1) $ 62,492 $ 521 $ 24 $ 62,989 States, municipalities and political subdivisions 79,141 2,090 20 81,211 Special revenue 264,897 4,782 160 269,519 Industrial and miscellaneous 198,291 4,118 44 202,365 Total $ 604,821 $ 11,511 $ 248 $ 616,084 December 31, 2018 Cost or Adjusted / Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities (1) $ 48,739 $ 40 $ 738 $ 48,041 States, municipalities and political subdivisions 60,028 46 785 59,289 Special revenue 249,026 210 3,881 245,355 Industrial and miscellaneous 155,678 81 3,302 152,457 Redeemable preferred stocks 4,920 — 413 4,507 Total $ 518,391 $ 377 $ 9,119 $ 509,649 (1) U.S. government and agency securities include pledged fixed maturity securities with an estimated fair value of $24.5 million and $31.0 million under the terms and condition of the advance agreement entered into with a financial institution as of September 30, 2019 and December 31, 2018, respectively. The Company is permitted to withdraw or exchange any portion of the pledged collateral over the minimum requirement at any time. The Company calculates the gain or loss realized on the sale of investments by comparing the sales price (fair value) to the cost or adjusted/amortized cost of the security sold. The Company determines the cost or adjusted/amortized cost of the security sold using the specific-identification method. The following tables detail the Company’s net realized gains (losses) by major investment category for the three and nine months ended September 30, 2019 and 2018. 2019 2018 Gains (Losses) Fair Value at Sale Gains (Losses) Fair Value at Sale Three Months Ended September 30, (In thousands) Fixed maturity securities $ 108 $ 43,255 $ — $ 15 Equity securities — — 1 173 Total realized gains 108 43,255 1 173 Fixed maturity securities — 2,317 — — Equity securities — — (8 ) 263 Total realized losses — 2,317 (8 ) 263 Net realized gains and (losses) $ 108 $ 45,572 $ (7 ) $ 436 2019 2018 Gains (Losses) Fair Value at Sale Gains (Losses) Fair Value at Sale Nine Months Ended September 30, (In thousands) Fixed maturity securities $ 958 $ 45,143 $ 78 $ 27,443 Equity securities 1,323 22,604 1 169 Total realized gains 2,281 67,747 79 27,612 Fixed maturity securities (76 ) 2,611 (237 ) 49,025 Equity securities (67 ) 2,374 (185 ) 4,193 Total realized losses (143 ) 4,985 (422 ) 53,218 Net realized gains and (losses) $ 2,138 $ 72,732 $ (343 ) $ 80,830 Gains (losses) on equity investments consists of realized and unrealized holding gains or losses on marketable equity investments and fair value adjustment, including, if any, impairments on nonmarketable equity investments. For the three and nine months ended September 30, 2018, the Company reclassed $128,000 and $927,000 from changes in the fair value of equity investments from Other revenue to Net realized and unrealized gains (losses) to conform to current presentation, respectively. For the three months ended September 30, 2019 the Company sold no equity securities nor did it hold any marketable equity securities as of that date. For the three months ended September 30, 2018, the Company received proceeds from the sale of marketable equity securities of approximately $428,000. The Company recorded a gross gain of $7,900 and a gross loss from these sales of approximately $14,700. For the nine months ended September 30, 2019 and 2018, the Company received proceeds from the sale of its holdings in marketable equity securities of approximately $26.5 million and $4.2 million. These sales resulted in a gross gain of $2.4 million and a gross loss of $1.2 million respectively, and a gross gain of approximately $1,100 and a gross loss of $184,500, respectively, related primarily to unrealized holding gains or losses in certain marketable equity securities. For the nine months ended September 30, 2019, the Company had unrealized net holding gains of $993,600 recognized on nonmarketable other investments still held at September 30, 2019. The table below summarizes the Company’s fixed maturity securities at September 30, 2019 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, 2019 Cost or Amortized Cost Percent of Total Fair Value Percent of Total Maturity dates: (In thousands) (In thousands) Due in one year or less $ 67,878 11 % $ 68,007 11 % Due after one year through five years 199,455 33 % 201,696 33 % Due after five years through ten years 139,435 23 % 144,386 23 % Due after ten years 198,053 33 % 201,995 33 % Total $ 604,821 100 % $ 616,084 100 % The following table summarizes the Company’s net investment income by major investment category for the three and nine months ended September 30, 2019 and 2018, respectively: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Fixed maturity securities $ 3,492 $ 3,020 $ 10,625 $ 8,018 Equity securities 22 547 944 1,252 Cash and cash equivalents 558 284 1,288 861 Other investments 324 425 258 1,168 Net investment income 4,396 4,276 13,115 11,299 Less: Investment expenses 741 429 1,958 1,595 Net investment income, less investment expenses $ 3,655 $ 3,847 $ 11,157 $ 9,704 The following tables present an aging of our unrealized losses on fixed maturity investments by investment class as of September 30, 2019 and December 31, 2018: Less Than Twelve Months Twelve Months or More September 30, 2019 Number of Securities Gross Unrealized Losses Fair Value Number of Securities Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities 4 2 $ 450 25 $ 22 $ 4,523 States, municipalities and political subdivisions 2 14 6,026 4 6 2,456 Industrial and miscellaneous 20 14 6,027 31 30 10,195 Special revenue 52 22 13,154 123 138 18,524 Total fixed maturity securities 78 $ 52 $ 25,657 183 $ 196 $ 35,698 Less Than Twelve Months Twelve Months or More December 31, 2018 Number of Securities Gross Unrealized Losses Fair Number of Securities Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities 17 $ 129 $ 10,485 66 $ 609 $ 20,488 States, municipalities and political subdivisions 13 103 12,864 42 682 39,979 Industrial and miscellaneous 214 1,479 70,156 232 1,822 70,375 Special revenue 105 1,260 76,335 323 2,621 108,319 Redeemable preferred stocks 55 193 2,541 27 221 1,965 Total fixed maturity securities 404 $ 3,164 $ 172,381 690 $ 5,955 $ 241,126 The Company is required to maintain assets on deposit with various regulatory authorities or in trust accounts to support its insurance and reinsurance operations. As of September 30, 2019, the Company evaluated its fixed maturity securities for impairment and determined that none of its investments in fixed maturity securities that reflected an unrealized loss position were other-than-temporarily impaired. The issuers of the fixed maturity securities in which the Company invests continue to make interest payments on a timely basis and have not suffered any credit rating reductions. The Company does not intend to sell, nor is it likely that it would be required to sell, the fixed maturity securities before the Company recovers its amortized cost basis. Limited Partnerships, REIT’s and Limited Liability Company Investments The Company has interests in limited partnerships (“LPs”) that are not registered or readily tradable on a securities exchange. The investments are private equity funds managed by general partners who make financial policy and operational decisions. The Company is not the primary beneficiary and does not consolidate these partnerships. As of September 30, 2019, the estimated fair value of our investments in the LPs interests was $21.0 million. The general partner's objective is to achieve capital appreciation through investments in marketable securities and broad markets, preferred stock, industry-focused and fixed income exchange-traded funds (ETFs). These funds are carried at net asset value, which approximates fair value with changes in fair value recorded in net realized gains (losses) on the Company’s condensed consolidated statement of income and comprehensive income. Realized gains (losses) on sales of these investments are reported within net realized and unrealized gains (losses) on the Company’s condensed consolidated statement of income and comprehensive income . The Company has an interest in limited liability companies (“LLCs”) that are not registered or readily tradable on a securities exchange. The investments are in LLCs that maintains a specific ownership account for each investor, similar to a partnership capital account structure, and are viewed as similar to an investment in a LP for purposes of determining whether a noncontrolling investment in an LLC shall be accounted for using the cost method or the equity method. The Company receives monthly returns of capital from the LLCs which reduces the fair value of the Company’s investments. As of September 30, 2019, the estimated fair value of the Company’s investments in the LLCs was $6.4 million. The interest expenses from these funds are recorded to net investment income. For the nine months ended September 30, 2019, the Company invested $24.9 million in LPs and LLCs. For the comparable period of 2018, the Company did not make acquisition of this category of assets. For the nine month period ended September 30, 2019, the Company recognized net investment gains in LPs in aggregate of $1.0 million. As of the third quarter of 2019 and 2018, the Company received cash distributions, net of allocations from its LLC investments of approximately $272,000 and $94,000, respectively, representing return of capital on its investments. The Company incurred approximately $565,000 of allocated costs during the third quarter of 2019 and $1,300 for the comparable period of 2018.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	NOTE 3. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company performs fair value measurements in accordance with FASB Accounting Standards Codification (ASC) 820, Fair Value Measurement For the Company’s investments in U.S. government securities that do not have prices in active markets, agency securities, state and municipal governments, and corporate bonds, the Company obtains the fair values from its third-party valuation service and evaluates the relevant inputs, assumptions, methodologies and conclusions associated with such valuations. The valuation service calculates prices for the Company’s investments in the aforementioned security types on a month-end basis by using several matrix-pricing methodologies that incorporate inputs from various sources. The model the valuation service uses to price U.S. government securities and securities of states and municipalities incorporates inputs from active market makers and inter-dealer brokers. To price corporate bonds and agency securities, the valuation service calculates non-call yield spreads on all issuers, uses option-adjusted yield spreads to account for any early redemption features, then adds final spreads to the U.S. Treasury curve as of quarter end. The inputs the valuation service uses in their calculations are not quoted prices in active markets, but are observable inputs, and therefore represent Level 2 inputs. As of September 30, 2019, and December 31, 2018, there were no transfers in or out of Level 1, 2, and 3. Investments excluded from the fair value hierarchy The Company also invests in real estate investment trusts (“REIT”), private LPs and LLCs. This investment categorization has the potential for higher returns but also the potential for higher degrees of risk, including less than stable rates of returns and may provide less liquidity. Fair value estimates of the LPs and LLCs are based on their net asset values, as reported by the manager of the LP or LLC. The fair value of these investments is measured at net asset value and is excluded from the fair value hierarchy. For the current LPs, the Company may, as of the last day of each calendar quarter, upon at least 65 days’ prior written notice, withdraw all or any portion of the balance in its investment. There is a 3% withdrawal fee if made during the first year of investment that expires in February 2020. September 30, 2019 Total Level 1 Level 2 Level 3 Invested Assets: (In thousands) Fixed maturity securities, available-for-sale: U.S. government and agency securities $ 62,989 $ 366 $ 62,623 $ — States, municipalities and political subdivisions 81,211 — 81,211 — Special revenue 269,519 — 269,519 — Industrial and miscellaneous 202,365 — 202,365 — Total fixed maturity securities 616,084 366 615,718 — Investments reported at NAV (1) 28,990 — — — Total investments $ 645,074 $ 366 $ 615,718 $ — December 31, 2018 Total Level 1 Level 2 Level 3 Invested Assets: (In thousands) Fixed maturity securities, available-for-sale: U.S. government and agency securities $ 48,041 $ 354 $ 47,687 $ — States, municipalities and political subdivisions 59,289 — 59,289 — Special revenue 245,355 — 245,355 — Industrial and miscellaneous 152,457 — 152,457 — Redeemable preferred stocks 4,507 4,507 — — Total fixed maturity securities 509,649 4,861 504,788 — Equity securities Common stock 2,264 2,264 — — Non-redeemable preferred stock 12,770 12,770 — — Total equity securities 15,034 15,034 — — Investments reported at NAV (1) 3,910 — — — Total investments $ 528,593 $ 19,895 $ 504,788 $ — (1) Includes $1.6 million and $1.4 million of Federal Home Loan Banks membership shares held by the Company as of September 30, 2019 and December 31, 2018, respectively. 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, 2019 and 2018, 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, we determine 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 2019 and 2018. We record any measurement period adjustments to the fair value of assets acquired and liabilities assumed, with the corresponding offset to goodwill.

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
	Sep. 30, 2019
Comprehensive Income Net Of Tax [Abstract]
Other Comprehensive Income	NOTE 4. OTHER COMPREHENSIVE INCOME Other comprehensive income (loss) was $15.1 million and $(6.4) million for the nine months ended September 30, 2019 and 2018, respectively. The difference between net income as reported and comprehensive income was due to the changes in unrealized gains and losses, net of taxes on fixed maturities securities. For the Three Months Ended September 30, 2019 2018 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive income Change in unrealized losses on investments, net $ 4,429 $ (1,060 ) $ 3,369 $ (2,895 ) $ 1,666 $ (1,229 ) Reclassification adjustment of realized losses (gains) included in net income (103 ) 25 (78 ) (5 ) (1 ) (6 ) Effect on other comprehensive income $ 4,326 $ (1,035 ) $ 3,291 $ (2,900 ) $ 1,665 $ (1,235 ) For the Nine Months Ended September 30, 2019 2018 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive income Change in unrealized losses on investments, net $ 19,533 $ (4,677 ) $ 14,856 $ (9,918 ) $ 3,185 $ (6,733 ) Reclassification adjustment of realized losses (gains) included in net income 291 (70 ) 221 307 64 371 Effect on other comprehensive income $ 19,824 $ (4,747 ) $ 15,077 $ (9,611 ) $ 3,249 $ (6,362 )

Leases

Leases	9 Months Ended
	Sep. 30, 2019
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 our right-of-use assets and lease obligations. Our 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 our lease costs for the three and nine months ended September 30, 2019 are as follows (in thousands): Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Amortization of ROU assets - Finance leases $ 19 $ 58 Interest on lease liabilities - Finance leases 6 17 Variable lease cost (cost excluded from lease payments) 113 337 Operating lease cost (cost resulting from lease payments) 331 918 Total lease cost $ 469 $ 1,330 Supplemental cash flow information and non-cash activity related to our operating and financing leases as of September 30, 2019 are as follows (in thousands): Nine Months Ended September 30, 2019 Finance lease - Operating cash flows $ 20 Finance lease - Financing cash flows $ 66 Operating lease - Operating cash flows (fixed payments) $ 613 Operating lease - Operating cash flows (liability reduction) $ 465 Supplemental balance sheet information related to our operating and financing leases as of September 30, 2019 are as follows (in thousands): Balance Sheet Classification September 30, 2019 Right-of-use assets - operating Other assets $ 6,567 Right-of-use assets - finance Other assets $ 323 Lease Liability (1) Accounts payable and other liabilities $ (8,293 ) Lease Liability - finance Accounts payable and other liabilities $ (342 ) (1) Includes $1.3 million in lease incentives received in the first quarter of 2019. Weighted-average remaining lease term and discount rate for our operating and financing leases as of September 30, 2019 are as follows: September 30, 2019 Weighted average lease term - Finance leases 3.91 yrs. Weighted average lease term - Operating leases 8.19 yrs. Weighted average discount rate - Finance leases 7.09 % Weighted average discount rate - Operating leases 5.32 % Maturities of lease liabilities by fiscal year for our operating and financing leases as of September 30, 2019 are as follows (in thousands): September 30, 2019 2019 remaining $ 380 2020 1,442 2021 1,401 2022 1,425 2023 1,371 2024 and thereafter 4,695 Total lease payments 10,714 Less: imputed interest (2,079 ) Present value of lease liabilities $ 8,635

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2019
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, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 (In thousands) Land $ 2,582 $ 2,582 Building 11,390 11,390 Computer hardware and software 5,539 4,901 Office furniture and equipment 1,973 1,397 Tenant and leasehold improvements 8,082 4,477 Vehicle fleet 789 854 Total, at cost 30,355 25,601 Less: accumulated depreciation and amortization (9,482 ) (7,603 ) Property and equipment, net $ 20,873 $ 17,998 Depreciation and amortization expense for property and equipment was $649,000 and $1.0 million for the three months ended September 30, 2019 and 2018 and $1.9 million and $1.7 million for the nine months ended September 30, 2019 and 2018, respectively. The Company’s real estate consists of 15 acres of land and five buildings with a gross area of 229,000 square feet and a parking garage.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2019
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, 2019 and December 31, 2018 goodwill was $152.5 million and intangible assets were $70.6 million and $76.9 million, respectively. The Company has determined the useful life of the other intangible assets to range between 2.5-15 years. The Company has recorded $1.3 million relating to insurance licenses and has classified the licenses as an indefinite lived intangible which is subject to annual impairment testing concurrent with goodwill. Goodwill (in thousands) Balance as of December 31, 2018 $ 152,459 Goodwill acquired — Impairment — Balance as of September 30, 2019 $ 152,459 Other Intangible Assets Our intangible assets resulted primarily from the acquisitions of Zephyr Acquisition Company in March 2016 and NBIC Holdings, Inc. in November 2017 and consist of brand, agent relationships, renewal rights, customer relations, trade names, non-competes and insurance licenses. Finite-lived intangibles assets are amortized over their useful lives from 2.5 to fifteen years. Amortization expense of our intangible assets was $2.1 million and $6.4 million for the three months ended September 30, 2019 and $6.3 million and $19.7 million for the nine months ended September 30, 2019 and 2018, respectively. No impairment in the value of amortizing or non-amortizing intangible assets was recognized during the three and nine months ended September 30, 2019 or 2018. Estimated annual pretax amortization of intangible assets for each of the next five years and thereafter is as follows (in thousands): Year Amount (1) 2019 remaining $ 1,927 2020 $ 6,365 2021 $ 6,351 2022 $ 6,351 2023 $ 6,351 2024 $ 6,351 Thereafter $ 35,558 Total $ 69,254 (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, 2019
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, 2019 2018 2019 2018 Basic earnings per share: Net income attributable to common stockholders (000's) $ 8,133 $ 5,989 $ 15,818 $ 23,227 Weighted average shares outstanding 29,109,962 25,631,871 29,329,742 25,663,415 Basic earnings per share: $ 0.28 $ 0.23 $ 0.54 $ 0.91 Diluted earnings per share: Net income attributable to common stockholders (000's) $ 8,133 $ 5,989 $ 15,818 $ 23,227 Weighted average shares outstanding 29,109,962 25,631,871 29,329,742 25,663,415 Weighted average dilutive shares 58,430 415,067 23,014 677,344 Total weighted average dilutive shares 29,168,392 26,046,938 29,352,756 26,340,759 Diluted earnings per share: $ 0.28 $ 0.23 $ 0.54 $ 0.88

Deferred Reinsurance Ceding Com

Deferred Reinsurance Ceding Commission	9 Months Ended
	Sep. 30, 2019
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 quarter ended September 30, 2019 and 2018, the Company allocated ceding commission income of $11.3 million and $13.7 million to policy acquisition costs and $3.7 million and $4.5 million to general and administrative expense, respectively. For the nine months ended September 30, 2019 and 2018, the Company allocated ceding commission income of $36.8 million and $42.1 million to policy acquisition costs and $12 million and $13.8 million to general and administrative expense, respectively. The table below depicts the activity with regard to deferred reinsurance ceding commission during the three and nine months ended September 30, 2019 and 2018. Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Beginning balance of deferred ceding commission income $ 34,705 $ 42,666 $ 44,996 $ 42,665 Ceding commission deferred 15,542 18,932 39,017 56,495 Less: ceding commission earned (15,062 ) (18,307 ) (48,828 ) (55,869 ) Ending balance of deferred ceding commission income $ 35,185 $ 43,291 $ 35,185 $ 43,291

Deferred Policy Acquisition Cos

Deferred Policy Acquisition Costs	9 Months Ended
	Sep. 30, 2019
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 costs will be fully recoverable in the near term. The table below depicts the activity with regard to DPAC during the three and nine months ended September 30, 2019 and 2018. Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Beginning Balance $ 74,064 $ 69,648 $ 73,055 $ 41,678 Policy acquisition costs deferred 26,856 12,108 100,757 68,048 Amortization (25,307 ) (6,054 ) (98,199 ) (34,024 ) Ending Balance $ 75,613 $ 75,702 $ 75,613 $ 75,702

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 11. INCOME TAXES For the three months ended September 30, 2019 and 2018, the Company recorded $3.0 million and $3.0 million, respectively, of income tax expenses which corresponds to effective tax rates of 26.6% and 33.4%, respectively. Lower pre-tax income for the prior year quarter had an adverse impact on the effective tax rate due to the impact of permanent tax differences. During the nine months ended September 30, 2019 and 2018, the Company recorded $5.7 million and $9.1 million, respectively, of income tax expense which corresponds to an estimated annual effective tax rate of 26.4% and 28.1%, respectively. Effective tax rates are dependent upon components of pre-tax earnings and the related tax effects. The effective tax rate can fluctuate throughout the year as estimates used in the tax provision are updated as more information becomes available. The table below summarizes the significant components of our net deferred tax assets (liabilities): September 30, 2019 December 31, 2018 Deferred tax assets: (In thousands) Unearned premiums $ 10,752 $ 12,090 Unearned commission 8,426 10,733 Net operating loss 109 109 Tax-related discount on loss reserve 2,669 2,329 Unrealized loss — 2,631 Stock-based compensation 1,190 297 Accrued expenses 1,296 2,321 Other 2,466 1,443 Total deferred tax asset 26,908 31,953 Deferred tax liabilities: Deferred acquisition costs 18,107 17,494 Prepaid expenses 192 112 Unrealized gains 2,936 — Property and equipment 304 664 Note discount 468 710 Basis in purchased investments 114 163 Basis in purchased intangibles 17,564 18,982 Other 1,501 1,533 Total deferred tax liabilities 41,186 39,658 Net deferred tax liability $ (14,278 ) $ (7,705 ) In April 2019, the Company was notified by the tax authority that the federal income tax returns for the years 2015, 2016 and 2017 will be examined. The Company does not believe the examination results will have an adverse impact on the condensed consolidated financial statements. At September 30, 2019 and December 31, 2018, 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, 2019
Insurance [Abstract]
Reinsurance	NOTE 12. REINSURANCE Overview The Company’s reinsurance program is designed, utilizing the Company’s risk management methodology, to address its exposure to catastrophes or large non-catastrophic losses. The Company’s program provides reinsurance protection for catastrophes including hurricanes, tropical storms, tornadoes and winter storms. The Company’s reinsurance agreements are part of its catastrophe management strategy, which is intended to provide its stockholders an acceptable return on the risks assumed in its property business, and to reduce variability of earnings, while providing protection to the Company’s policyholders. In order to limit our potential exposure to catastrophic events, we purchase significant reinsurance from third party reinsurers and sponsor catastrophe bonds issued by Citrus Re Ltd. The catastrophe reinsurance may be on an excess of loss or quota share basis. We also purchase reinsurance for non-catastrophe losses on a quota share, per risk or facultative basis. Purchasing a sufficient amount of reinsurance to consider catastrophic losses from single or multiple events or significant non-catastrophe losses is an important part of our risk strategy, and premiums paid (or ceded) to reinsurers is one of our largest cost components. 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 our reinsurers are unable to meet the obligations they assume under our reinsurance agreements, we remain liable for the entire insured loss. Our reinsurance agreements are prospective contracts. We record an asset, prepaid reinsurance premiums, and a liability, reinsurance payable, for the entire contract amount upon commencement of our new reinsurance agreements. We generally amortize our catastrophe reinsurance premiums over the 12-month contract period on a straight-line basis, which is June 1 through May 31. Our 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 we incur losses and loss adjustment expenses recoverable under our reinsurance program, we record amounts recoverable from our 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 our liability for unpaid losses associated with the reinsured policies; therefore, the amount changes in conjunction with any changes to our 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 our condensed consolidated financial statements. Our 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. Our reinsurance program provides reinsurance in excess of our state regulator requirements, which are based on the probable maximum loss that we would incur from an individual catastrophic event estimated to occur once in every 100 years based on our 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. We also purchase reinsurance coverage to protect against the potential for multiple catastrophic events occurring in the same year. We share portions of our reinsurance program coverage among our insurance company affiliates. Significant Reinsurance Contracts 2019-2020 Excess of Loss Reinsurance Programs Catastrophe Excess of Loss Reinsurance Effective June 1, 2019, we 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 amongst traditional reinsurers, catastrophe bonds issued by Citrus Re Ltd., a Bermuda special purpose insurer formed in 2014 (“Citrus Re”), the Florida Hurricane Catastrophe Fund (“FHCF”) and Osprey Re Ltd, our captive reinsurer. The FHCF covers Florida risks only and we participate at 90%. Our 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 2019-2020 reinsurance program provides first event coverage up to $1.5 billion for Heritage P&C, first event coverage up to $708.0 million for Zephyr, and first event coverage up to $936.0 million for NBIC. Our first event retention for each insurance company subsidiary follows: Heritage P&C - $20.0 million; Zephyr - $20.0 million; NBIC – $13.8 million. Our program was placed on a cascading basis which provides greater horizontal protection in a multiple small events scenario and features additional coverage enhancements. This coverage exceeds the requirements established by the ratings agency of our insurance company affiliates, Demotech, Inc., the Florida Office of Insurance Regulation, the Hawaii Insurance Division, and the Rhode Island Department of Business Regulation. We are responsible for all losses and loss adjustment expenses in excess of our reinsurance program. For second or subsequent catastrophic events, our total available coverage depends on the magnitude of the first event, as we may have coverage remaining from layers that were not previously fully exhausted. An aggregate of $2.6 billion of limit purchased in 2019 includes reinstatement through the purchase of reinstatement premium protection. In total, we have purchased $2.6 billion of potential reinsurance coverage, including our retention, for multiple catastrophic events. Our ability to access this coverage, however, will be subject to the severity and frequency of such events. The Company's estimated net cost for the 2019-2020 catastrophe reinsurance programs is approximately $249.2 million. Gross Quota Share Reinsurance NBIC did not enter into a gross quota share reinsurance program for its fiscal year beginning June 1, 2019. For its previous fiscal year, NBIC purchased an 8% gross quota share reinsurance treaty effective June 1, 2018 which provided ground up loss recoveries of up to $1.0 billion. Net Quota Share Reinsurance NBIC’s Net Quota Share coverage is proportional reinsurance for which certain of our other reinsurance inures to the quota share (property catastrophe excess of loss and reinstatement premium protection and the second layer of the general excess of loss). An occurrence limit of $20.0 million for catastrophe losses is in effect on the quota share, subject to certain aggregate loss limits that vary by reinsurer. The amount and rate of reinsurance commissions slide, within a prescribed minimum and maximum, depending on loss performance. The Net Quota Share program was renewed on December 31, 2018 ceding 52% of the net premiums and losses and 10% of the prior year quota share will run off. Aggregate Coverage A $931.0 million of limit is structured on an aggregate basis (Top and Aggregate, Layer 1, Layer 2, Layer 3, Layer 4, Layer 5, Stub layers, Multi-Zonal and 2017-1 Notes). To the extent that this coverage is not fully exhausted in the first catastrophic event, it provides coverage commencing at its reduced retention for second and subsequent events where underlying coverage has been previously exhausted. The Company purchased reinstatement premium protection for $627.0 million of this coverage, which can be reinstated one time. Layers (with exception to FHCF) are “net” of a $40.0 million attachment point. Layers inure to the subsequent layers if the aggregate limit of the preceding layer(s) is exhausted, and the subsequent layer cascades down in its place. NBIC placed 40% of an aggregate contract, which covers all catastrophe losses excluding named storms, on December 31, 2018, expiring May 31, 2019. The limit on the contract is $20.0 million, with a retention of $20.0 million and franchise deductible of $1.0 million. NBIC placed 100% of an occurrence contract, which covers all catastrophe losses excluding named storms, on December 31, 2018, expiring December 31, 2019. 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 southeast losses and northeast commercial residential losses, 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 Northeast commercial residential losses only, 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 Southeast losses and Northeast commercial residential losses, excluding losses from named storms. General Excess of Loss NBIC’s general excess of loss reinsurance protects NBIC from single risk losses, both property and casualty. The casualty coverage provided by this reinsurance contract also responds on a “Clash” basis, meaning that multiple policies involved in a single loss occurrence can be aggregated into one loss and applied to the reinsurance contract. The coverage is in two layers in excess of NBIC’s retention of the first $400,000 of loss. The first layer is $350,000 excess $400,000 and the second layer is $2.75 million excess $750,000 (Casualty second layer is $1.25 million excess $750,000). Both layers are 100% placed. Semi-Automatic Facultative Excess of Loss NBIC’s automatic property facultative reinsurance protects NBIC from single risk losses, for property risks with a total insured value excess of $3.5 million subject to a limit. 2018 – 2019 Reinsurance Program Catastrophe Excess of Loss Reinsurance Effective June 1, 2018, we entered into catastrophe excess of loss reinsurance agreements covering Heritage P&C, Zephyr and NBIC. The catastrophe reinsurance programs are allocated amongst traditional reinsurers, catastrophe bonds issued by Citrus Re and FHCF. The FHCF covers Florida risks only and we participate at 45%. Citrus Re, which provides fully collateralized multi-year coverage, covers catastrophe losses incurred by Heritage P&C only through the 2016 Class D and 2017-1 Notes, and covers catastrophe losses incurred by Heritage P&C, Zephyr and NBIC through the 2016 Class E Note. Our 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 2018-2019 reinsurance program provides first event coverage up to $1.6 billion for Heritage P&C, first event coverage up to $801.0 million for Zephyr, and first event coverage up to $1.0 billion for NBIC. Our first event retention for each insurance company subsidiary follows: Heritage P&C - $20.0 million; Zephyr - $20.0 million; NBIC – $12.8 million. Our second and third event retentions for each insurance company subsidiary follows: Heritage P&C - $16.0 million; Zephyr - $16.0 million; NBIC – $8.8 million. Our program was placed on a cascading basis which provides greater horizontal protection in a multiple small events scenario and features additional coverage enhancements. This coverage exceeds the requirements established by the Companies’ rating agency, Demotech, Inc., the Florida Office of Insurance Regulation, the Hawaii Insurance Division, and the Rhode Island Department of Business Regulation. For the twelve months ending May 31, 2019, no single uncollateralized private reinsurer represented more than 10% of the overall limit purchased from our total reinsurance coverage. We are responsible for all losses and loss adjustment expenses in excess of our reinsurance program. For second or subsequent catastrophic events, our total available coverage depends on the magnitude of the first event, as we may have coverage remaining from layers that were not previously fully exhausted. An aggregate of $3.4 billion of limit purchased in 2018 includes reinstatement through the purchase of reinstatement premium protection. In total, we have purchased $3.5 billion of potential reinsurance coverage, including our retention, for multiple catastrophic events. Our ability to access this coverage, however, will be subject to the severity and frequency of such events. The Company's estimated net cost for the 2018-2019 catastrophe reinsurance programs is approximately $252.0 million. Gross Quota Share Reinsurance NBIC purchased an 8% gross quota share reinsurance treaty effective June 1, 2018 which provides ground up loss recoveries of up to $1.0 billion. Prior to this treaty, NBIC’s gross quota share treaty was 18.75%. Net Quota Share Reinsurance NBIC’s Net Quota Share coverage is proportional reinsurance for which certain of our other reinsurance inures to the quota share (property catastrophe excess of loss and reinstatement premium protection and the second layer of the general excess of loss). An occurrence limit of $20.0 million for catastrophe losses is in effect on the quota share, subject to certain aggregate loss limits that vary by reinsurer. The amount and rate of reinsurance commissions slide, within a prescribed minimum and maximum, depending on loss performance. NBIC ceded 49.5% of net premiums and losses during 2018 to the Net Quota Share and 8% of the 2017 Net Quota Share was in runoff. The Net Quota Share program was renewed on December 31, 2018 ceding 52% of the net premiums and losses and 10% of the prior year quota share will run off. Aggregate Coverage A $1.1 billion of limit is structured on an aggregate basis (Top and Aggregate, Layer 1, Layer 2, Layer 3, Layer 4, Stub layers, Multi-Zonal, 2017-1 Notes and 2016 Class E Notes). To the extent that this coverage is not fully exhausted in the first catastrophic event, it provides coverage commencing at its reduced retention for second and subsequent events where underlying coverage has been previously exhausted. The Company purchased reinstatement premium protection for $669.0 million of this coverage, which can be reinstated one time. Layers (with exception to FHCF and 2016 Class D Notes) are “net” of a $40.0 million attachment point. Layers inure to the subsequent layers if the aggregate limit of the preceding layer(s) is exhausted, and the subsequent layer cascades down in its place. NBIC placed 42.5% of an aggregate contract, which covers all catastrophe losses excluding named storms, on May 31, 2018, expiring December 31, 2018. The limit on the contract is $20.0 million, with a retention of $3.0 million and franchise deductible of $1.5 million. NBIC placed 92% of an occurrence contract, which covers all catastrophe losses excluding named storms, on May 31, 2018, expiring December 31, 2018. The limit on the contract is $20.0 million with a retention of $20.0 million. NBIC placed 40% of an aggregate contract, which covers all catastrophe losses excluding named storms, on December 31, 2018, expiring May 31, 2019. The limit on the contract is $20.0 million, with a retention of $20.0 million and franchise deductible of $1.0 million. NBIC placed 100% of an occurrence contract, which covers all catastrophe losses excluding named storms, on December 31, 2018, expiring December 31, 2019. 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 southeast losses and northeast commercial residential losses, 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. In addition, the Company purchased facultative reinsurance in excess of $10.0 million for any properties it insured where the total insured value exceeded $10.0 million. This coverage applied to Southeast losses and Northeast commercial residential losses, excluding losses from name storms. General Excess of Loss NBIC’s general excess of loss reinsurance protects NBIC from single risk losses, both property and casualty. The casualty coverage provided by this contract also responds on a “Clash” basis, meaning that multiple policies involved in a single loss occurrence can be aggregated into one loss and applied to the reinsurance contract. The coverage is in two layers in excess of NBIC’s retention of the first $300,000 of loss. The first layer is $450,000 excess $300,000 and the second layer is $2.75 million excess $750,000 (Casualty second layer is $1.25 million excess $750,000). Both layers are 92% placed with the gross quota share providing the additional 8% coverage. Semi-Automatic Facultative Excess of Loss NBIC’s automatic property facultative reinsurance protects NBIC from single risk losses, for property risks with a total insured value excess of $3.5 million subject to a limit. 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, 2019 and 2018: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) (In thousands) Premium written: Direct $ 237,303 $ 233,613 $ 702,491 $ 701,643 Ceded (46,858 ) (102,651 ) (406,300 ) (411,634 ) Net $ 190,445 $ 130,962 $ 296,191 $ 290,009 Premiums earned: Direct $ 231,617 $ 234,164 $ 690,165 $ 692,298 Ceded (107,755 ) (115,926 ) (342,529 ) (356,748 ) Net $ 123,862 $ 118,238 $ 347,636 $ 335,550 Loss and Loss Adjustment Expenses Direct $ 108,788 $ 145,753 $ 383,354 $ 697,743 Ceded (38,736 ) (87,058 ) (176,864 ) (519,968 ) Net $ 70,052 $ 58,695 $ 206,490 $ 177,775

Reserve For Unpaid Losses

Reserve For Unpaid Losses	9 Months Ended
	Sep. 30, 2019
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 table below summarizes the activity related to the Company’s reserve for unpaid losses: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Balance, beginning of period $ 430,413 $ 488,610 $ 432,359 $ 470,083 Less: reinsurance recoverable on unpaid losses 223,023 315,308 250,506 315,353 Net balance, beginning of period 207,390 173,302 181,853 154,730 Incurred related to: Current year 73,448 61,900 208,796 163,115 Prior years (396 ) (3,205 ) (2,306 ) 14,660 Total incurred 73,052 58,695 206,490 177,775 Paid related to: Current year 53,920 19,544 94,075 41,361 Prior years 17,820 17,585 85,566 96,276 Total paid 71,740 37,129 179,641 137,637 Net balance, end of period 208,702 194,868 208,702 194,868 Plus: reinsurance recoverable on unpaid losses 208,884 226,227 208,884 226,227 Balance, end of period $ 417,586 $ 421,095 $ 417,586 $ 421,095 As of September 30, 2019, the Company reported $208.7 million in unpaid losses and loss adjustment expenses, net of reinsurance which included $158.2 million attributable to IBNR net of reinsurance recoverable, or 75.8% of net reserves for unpaid losses and loss adjustment expenses. The Company’s losses incurred for the third quarter ended September 30, 2019 and 2018 reflect favorable development of $0.4 million and $3.2 million, respectively, associated with management’s best estimate of the actuarial loss and LAE reserves with consideration given to Company specific historical loss experience. While a portion of the 2018 development includes additional retention for hurricane losses, the majority of the 2018 loss development related to personal lines litigated and assignment of benefit claims from 2016 and 2017 accident years.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
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, commencing in 2018. As of September 30, 2019, the Company had $21.1 million of the Convertible Notes outstanding, net of issuance and debt discount costs in aggregate of approximately, $2.3 million. For nine months ended 2019 and 2018, the Company made interest payments of approximately $1.5 million and $7.7 million, respectively on the Convertible Notes. Debt Extinguishment On February 19, 2019, the Company reacquired $5.8 million of its outstanding Convertible Notes for approximately $2.9 million, which was paid in cash and the issuance of 285,201 shares of the Company’s common stock valued at $4.2 million. The repurchase resulted in a $48,000 non-operating loss. 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”). Term Loan Facility: The principal amount of the Term Loan Facility amortizes in quarterly installments, beginning with the close of the fiscal quarter ending March 31, 2019, in an amount equal to $1.9 million per quarter, with the remaining balance payable at maturity. As of December 31, 2018, there was $75.0 million in aggregate principal outstanding on the Term Loan Facility. As of September 30, 2019, the balance of the term loan was $71.3 million. For the nine months ended September 30, 2019, the Company made interest payments of approximately $2.3 million on the term loan. Revolving Credit Facility : The Revolving Credit Facility allows for borrowings of up to $50.0 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 December 31, 2018, there was $20.0 million in aggregate principal outstanding under the Revolving Credit Facility. As of September 30, 2019, the Company had $10.0 million of borrowings and no letters of credit outstanding under the Revolving Credit Facility. For the nine months ended September 30, 2019, the Company made interest payments of approximately $421,000 under the credit facility, respectively. At September 30, 2019, the Company’s effective interest rate for the Term Loan Facility was 5.625% and 5.3125% for the Revolving Credit Facility. The Company monitors the rates prior to the reset date which allows it to establish if the payment is monthly or quarterly payment based on the most beneficial rate used to calculate the interest payment. 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 against the loan. For each of the respective nine-month periods ended September 30, 2019 and 2018, 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 fixed interest rate 3.094% cash loan of $19.2 million from the Federal Home Loan Bank (“FHLB”) Atlanta. In connection with the 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 securities be pledged as collateral. As of September 30, 2019, the fair value of the collateralized securities was $24.5 million and the equity investment in FHLB common stock was $1.4 million. As of September 30, 2019, the Company made quarterly interest payments of approximately $452,000 per the terms of the agreement. The Company has also purchased common stock from FHLB Des Moines, and FHLB Boston valued at $140,200 and $76,600, respectively. The following table summarizes the Company’s debt and credit facilities as of September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 (in thousands) Convertible debt $ 23,413 $ 29,163 Mortgage loan 12,188 12,394 Term loan facility 71,250 75,000 Revolving credit facility 10,000 20,000 FHLB loan agreement 19,200 19,200 Total principal amount $ 136,051 $ 155,757 Less: unamortized discount and issuance costs $ 5,202 $ 6,963 Total long-term debt $ 130,849 $ 148,794 As of the date of this report, we were in compliance with the applicable terms of all our covenants and other requirements under the Revolving agreement, Term Note, Convertible Debt, cash borrowings and other loans. Our ability to secure future debt financing depends, in part, on our ability to remain in such compliance. As long as there is no default or an event of default exist, we are allowed to payout dividends in an aggregate amount not to exceed $10.0 million in any fiscal year. The schedule of principal payments on long-term debt is as follows: Year Amount (In thousands) 2019 remaining $ 3,821 2020 7,790 2021 7,806 2022 7,822 2023 74,589 Thereafter 34,223 Total $ 136,051

Accounts Payable and Other Liab

Accounts Payable and Other Liabilities	9 Months Ended
	Sep. 30, 2019
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, 2019 and December 31, 2018: Description September 30, 2019 December 31, 2018 (In thousands) Deferred ceding commission $ 35,185 $ 44,996 Outstanding claim checks — 15,360 Accounts payable and other payables 7,096 8,379 Lease obligations 8,635 — Accrued interest and issuance costs 1,476 1,285 Accrued dividends 1,772 1,589 Premium tax — 2,241 Other liabilities 37 460 Commission payables 12,228 11,654 Total other liabilities $ 66,428 $ 85,964

Statutory Accounting and Regula

Statutory Accounting and Regulations	9 Months Ended
	Sep. 30, 2019
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 our 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 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 and NBIC was $337.3 million at September 30, 2019. The combined statutory surplus for Heritage P&C, Zephyr and NBIC was $376.3 million at December 31, 2018. State law also requires the Company’s insurance subsidiaries to adhere to prescribed premium-to-capital surplus ratios, with which the Company is in compliance. At September 30, 2019, our insurance subsidiaries met the financial and regulatory requirements of the states in which they do business.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
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. When determinable, the Company discloses the range of possible losses in excess of those accrued and for reasonably possible losses.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 18. RELATED PARTY TRANSACTIONS The Company has been party to various related party transactions involving certain of its officers, directors and significant stockholders 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, 2019 and 2018. • In January 2017, the Company entered into a consulting agreement with Mrs. Shannon Lucas, the wife of the Chairman and CEO, in which she agreed to provide consulting services related to the Company’s catastrophe reinsurance and risk management program at a rate of $400 per hour. The consulting agreement has no specific term and either party may terminate the agreement upon providing written notice. Additionally, she serves as a director of Heritage P&C with an annual compensation of $150,000. For the nine months ended September 30, 2019 and 2018, the Company paid consulting fees to Ms. Lucas of approximately $256,000 and $575,000, respectively. • In July 2019, the Board of Directors appointed Mark Berset to the Board of Directors of the Company. Mr. Berset will be entitled to an annual compensation of $150,000. 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 nine months ended September 30, 2019 and 2018, the Company paid agency commission to Comegy of approximately $557,700 and $375,550, respectively.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2019
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 and nine months ended September 30, 2019 and 2018, the contributions made to the plan on behalf of the participating employees were approximately $213,000 and $756,000, and $215,000 and $973,000, respectively. The Company provides for its employees a partially self-insured healthcare plan and benefits. For the three and nine months ended September 30, 2019 and 2018, incurred medical premium costs amounted to an aggregate of $611,000 and $2.4 million and $1.0 million and $2.3 million, respectively. An additional liability of approximately $391,000 is recorded for unpaid claims as of September 30, 2019. A stop loss reinsurance policy caps the maximum loss that could be incurred by the Company under the self-insured plan. The Company’s stop loss coverage per employee is $150,000 for which any excess cost would be covered by the reinsurer subject to an aggregate limit for losses in excess of $1.5 million which would provide up to $1.0 million of coverage. Any excess of the $1.5 million retention and the $1 million of aggregate coverage would be borne by the Company. The aggregate stop loss commences once our expenses exceed 125% of the annual aggregate expected claims.

Equity

Equity	9 Months Ended
	Sep. 30, 2019
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, 2019, the Company had 28,963,841 shares of common stock outstanding, 8,036,560 treasury shares of common stock and 570,534 unvested shares of restricted common stock issued reflecting total paid-in capital of $331.6 million as of such date. As more fully disclosed in our audited consolidated financial statements for the year ended December 31, 2018, there were, as of December 31, 2018, 29,477,756 shares of common stock outstanding, 7,214,797 treasury shares of common stock and 605,801 unvested shares of restricted common stock, representing $325.3 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 are no redemption or sinking fund provisions applicable to the common stock. All outstanding shares of the Company’s capital stock are fully paid and nonassessable. Stock Repurchase Program On August 1, 2018, the Company announced that its Board of Directors authorized a stock repurchase program authorizing the Company to repurchase up to $50.0 million of its common stock through December 31, 2020 under our current Rule 10b5-1 trading plan, which allows the Company to purchase shares below a predetermined price per share. For the three months ended September 30, 2019, the Company purchased 316,383 shares of its common stock for $4.5 million. As of September 30, 2019, the Company repurchased in aggregate 821,763 shares of its common stock since authorizing the stock repurchase program for $11.9 million. At September 30, 2019, the Company has the capacity to repurchase $38.1 million of its common shares until December 2020. In addition, the Company acquired 4,620 shares and 12,620 shares for approximately $68,000 and $118,000 during three and nine months ended September 30, 2019, respectively, that were not part of the publicly announced share repurchase authorization. These shares consisted of shares retained to cover payroll withholding taxes in connection with the vesting of restricted stock awards Dividends On February 25, 2019, the Company’s Board of Directors declared a $0.06 per share quarterly dividend payable on April 3, 2019, to stockholders of record as of March 15, 2019. On May 6, 2019, the Company’s Board of Directors declared a $0.06 per share quarterly dividend payable on July 3, 2019 to stockholders of record as of June 14, 2019 On August 1, 2019, the Company’s Board of Directors declared a $0.06 per share quarterly dividend payable on October 3, 2019 to stockholders of record as of September 16, 2019. 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, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	NOTE 21. STOCK-BASED COMPENSATION Restricted 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. At September 30, 2019 there were 1,326,018 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. In 2018, the Company granted 155,801 restricted shares vesting over three to five years, to the Company’s executives and other key employees. No restricted stock was granted during the nine months ended September 30, 2019. 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. If a participant’s employment relationship ends, the participant’s vested awards would remain exercisable for the shorter of a period of 30 days or the period ending on the latest date on which such award could have been exercisable. The fair value of each option grant is separately estimated for each grant date. The fair value of each option is amortized into compensation expense on a straight-line basis between the grant date for the award and each vesting date. The Company estimates the fair value of all stock option awards as of the date of the grant by applying the Black-Scholes-Merton multiple-option pricing valuation model. The application of this valuation model involves assumptions that are judgmental and highly sensitive in the determination of compensation expense. 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 employees 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 quarter ended September 30, 2019 is as follows: Weighted-Average Grant-Date Fair Number of shares Value per Share Non-vested, at December 31, 2018 605,801 $ 19.30 Granted — — Vested (22,647 ) 14.28 Canceled and surrendered (12,620 ) 14.24 Non-vested, at September 30, 2019 570,534 $ 19.61 Awards are being amortized to expense over the three to five-year vesting period. The Company recognized $4.0 million and $3.9 million of compensation expense for the nine months ended September 30, 2019 and 2018, respectively. There was approximately $6.9 million of unrecognized compensation expense related to the un-vested restricted stock at September 30, 2019. The Company expects to recognize substantially all of remaining compensation expense over the next 1.3 years. For the nine months ended September 30, 2019, 35,267 shares of restricted stock were vested and released, all of which had been granted to employees. Of the shares released to employees, 12,620 shares were withheld by the Company to cover withholding taxes of $186,000. For the comparable period of 2018, no shares were vested and released.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2019
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, 2019. On October 31, 2019, the Company announced that its Board of Directors declared a $0.06 per share quarterly dividend payable on January 3, 2020 to stockholders of record as of December 16, 2019.

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
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, 2018 (the “ 2018 Form 10- K”).
Leases	Leases At the inception of a contract, we assess whether the contract is, or contains, a lease. The assessment is based on (1) whether the contract involves the use of distinct identified assets, (2) whether the Company obtains the right to substantially all the economic benefit from the use of the asset throughout the period, and (3) whether the Company has the right to direct the use of the asset. All significant lease arrangements are generally recognized at lease commencement. A right of use (“ROU”) asset and corresponding lease liability are not recorded for leases with an initial term of 12 months or less (short term leases) and we recognize lease expense for these leases as incurred over the lease term. ROU assets represent our right to use an underlying asset during the reasonably certain lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Our lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise the option. Operating lease ROU assets and liabilities are recognized based on the present value of lease payments not yet paid. Lease payments may be fixed or variable, however, only fixed payments or in-substance fixed payments are included in determining the lease liability. Variable lease payments are recognized in operating expenses in the period in which the obligation for those payments are incurred. The operating lease ROU asset also includes any lease payments related to initial direct cost and prepayments and excludes lease incentives. Lease expense is recognized on a straight-line basis over the term of the lease. We have lease agreements with lease and non-lease components, which are generally accounted for separately. We primarily use our incremental borrowing rates for our operating leases (rates are not readily determinable) and implicit rates for our financing leases in determining the present value of lease payments. In the first quarter of 2019, the Company adopted ASU 2016 -02 and did not recognize an opening adjustment to retained earnings as a result of the adoption of FASB 842. Refer to Note 5-Leases herein for further information.
Reclassification	Reclassification Certain prior year amounts have been reclassified to conform to the current year presentation.
Recent Accounting Pronouncements	Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases We adopted the guidance prospectively during the first quarter of 2019. As part of our adoption, we elected not to reassess historical lease classification or recognize short-term leases on our balance sheet. At implementation, we recorded approximately $2.8 million as right-of-use operating and financing We did not recognize an opening adjustment to retained earnings. Note 5 Accounting Pronouncements Not Yet Adopted In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments Financial Instruments-Overall Recognition and Measurement of Financial Assets and Financial Liabilities FASB ASU 2016-13 Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments The Company’s implementation activities, which remain in process, include the development of models, methodologies, data input and assumptions to be used in estimating expected credit losses. The implementation primarily impacts the Company’s debt securities and reinsurance recoverable balances. The adoption of this standard is not expected to be material to our financial position, results of operations or cash flows. For information regarding other accounting standards that the Company has not yet adopted, refer to our Annual Report on Form 10-K, filed on March 12, 2019, the section of Note 1 of the notes to the consolidated financial statements entitled the “Accounting Pronouncement Not Yet Adopted”.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Schedule of Difference between Cost or Adjusted/Amortized Cost and Estimated Fair Value, by Major Investment Category	Securities Available-for-Sale The following table details the difference between cost or adjusted/amortized cost and estimated fair value, by major investment category, at September 30, 2019 and December 31, 2018: September 30, 2019 Cost or Adjusted / Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities (1) $ 62,492 $ 521 $ 24 $ 62,989 States, municipalities and political subdivisions 79,141 2,090 20 81,211 Special revenue 264,897 4,782 160 269,519 Industrial and miscellaneous 198,291 4,118 44 202,365 Total $ 604,821 $ 11,511 $ 248 $ 616,084 December 31, 2018 Cost or Adjusted / Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities (1) $ 48,739 $ 40 $ 738 $ 48,041 States, municipalities and political subdivisions 60,028 46 785 59,289 Special revenue 249,026 210 3,881 245,355 Industrial and miscellaneous 155,678 81 3,302 152,457 Redeemable preferred stocks 4,920 — 413 4,507 Total $ 518,391 $ 377 $ 9,119 $ 509,649 (1) U.S. government and agency securities include pledged fixed maturity securities with an estimated fair value of $24.5 million and $31.0 million under the terms and condition of the advance agreement entered into with a financial institution as of September 30, 2019 and December 31, 2018, respectively. 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 Gains (Losses) by Major Investment Category	The Company calculates the gain or loss realized on the sale of investments by comparing the sales price (fair value) to the cost or adjusted/amortized cost of the security sold. The Company determines the cost or adjusted/amortized cost of the security sold using the specific-identification method. The following tables detail the Company’s net realized gains (losses) by major investment category for the three and nine months ended September 30, 2019 and 2018. 2019 2018 Gains (Losses) Fair Value at Sale Gains (Losses) Fair Value at Sale Three Months Ended September 30, (In thousands) Fixed maturity securities $ 108 $ 43,255 $ — $ 15 Equity securities — — 1 173 Total realized gains 108 43,255 1 173 Fixed maturity securities — 2,317 — — Equity securities — — (8 ) 263 Total realized losses — 2,317 (8 ) 263 Net realized gains and (losses) $ 108 $ 45,572 $ (7 ) $ 436 2019 2018 Gains (Losses) Fair Value at Sale Gains (Losses) Fair Value at Sale Nine Months Ended September 30, (In thousands) Fixed maturity securities $ 958 $ 45,143 $ 78 $ 27,443 Equity securities 1,323 22,604 1 169 Total realized gains 2,281 67,747 79 27,612 Fixed maturity securities (76 ) 2,611 (237 ) 49,025 Equity securities (67 ) 2,374 (185 ) 4,193 Total realized losses (143 ) 4,985 (422 ) 53,218 Net realized gains and (losses) $ 2,138 $ 72,732 $ (343 ) $ 80,830
Schedule of Amortized Cost and Fair Value of Investment Securities by Contractual Maturity	The table below summarizes the Company’s fixed maturity securities at September 30, 2019 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, 2019 Cost or Amortized Cost Percent of Total Fair Value Percent of Total Maturity dates: (In thousands) (In thousands) Due in one year or less $ 67,878 11 % $ 68,007 11 % Due after one year through five years 199,455 33 % 201,696 33 % Due after five years through ten years 139,435 23 % 144,386 23 % Due after ten years 198,053 33 % 201,995 33 % Total $ 604,821 100 % $ 616,084 100 %
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, 2019 and 2018, respectively: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Fixed maturity securities $ 3,492 $ 3,020 $ 10,625 $ 8,018 Equity securities 22 547 944 1,252 Cash and cash equivalents 558 284 1,288 861 Other investments 324 425 258 1,168 Net investment income 4,396 4,276 13,115 11,299 Less: Investment expenses 741 429 1,958 1,595 Net investment income, less investment expenses $ 3,655 $ 3,847 $ 11,157 $ 9,704
Aging of Gross Unrealized Losses on Fixed Maturity Investments	The following tables present an aging of our unrealized losses on fixed maturity investments by investment class as of September 30, 2019 and December 31, 2018: Less Than Twelve Months Twelve Months or More September 30, 2019 Number of Securities Gross Unrealized Losses Fair Value Number of Securities Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities 4 2 $ 450 25 $ 22 $ 4,523 States, municipalities and political subdivisions 2 14 6,026 4 6 2,456 Industrial and miscellaneous 20 14 6,027 31 30 10,195 Special revenue 52 22 13,154 123 138 18,524 Total fixed maturity securities 78 $ 52 $ 25,657 183 $ 196 $ 35,698 Less Than Twelve Months Twelve Months or More December 31, 2018 Number of Securities Gross Unrealized Losses Fair Number of Securities Gross Unrealized Losses Fair Value Fixed maturity securities, available-for-sale (In thousands) U.S. government and agency securities 17 $ 129 $ 10,485 66 $ 609 $ 20,488 States, municipalities and political subdivisions 13 103 12,864 42 682 39,979 Industrial and miscellaneous 214 1,479 70,156 232 1,822 70,375 Special revenue 105 1,260 76,335 323 2,621 108,319 Redeemable preferred stocks 55 193 2,541 27 221 1,965 Total fixed maturity securities 404 $ 3,164 $ 172,381 690 $ 5,955 $ 241,126

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Financial Instruments	September 30, 2019 Total Level 1 Level 2 Level 3 Invested Assets: (In thousands) Fixed maturity securities, available-for-sale: U.S. government and agency securities $ 62,989 $ 366 $ 62,623 $ — States, municipalities and political subdivisions 81,211 — 81,211 — Special revenue 269,519 — 269,519 — Industrial and miscellaneous 202,365 — 202,365 — Total fixed maturity securities 616,084 366 615,718 — Investments reported at NAV (1) 28,990 — — — Total investments $ 645,074 $ 366 $ 615,718 $ — December 31, 2018 Total Level 1 Level 2 Level 3 Invested Assets: (In thousands) Fixed maturity securities, available-for-sale: U.S. government and agency securities $ 48,041 $ 354 $ 47,687 $ — States, municipalities and political subdivisions 59,289 — 59,289 — Special revenue 245,355 — 245,355 — Industrial and miscellaneous 152,457 — 152,457 — Redeemable preferred stocks 4,507 4,507 — — Total fixed maturity securities 509,649 4,861 504,788 — Equity securities Common stock 2,264 2,264 — — Non-redeemable preferred stock 12,770 12,770 — — Total equity securities 15,034 15,034 — — Investments reported at NAV (1) 3,910 — — — Total investments $ 528,593 $ 19,895 $ 504,788 $ — (1) Includes $1.6 million and $1.4 million of Federal Home Loan Banks membership shares held by the Company as of September 30, 2019 and December 31, 2018, respectively.

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2019
Comprehensive Income Net Of Tax [Abstract]
Effect on Other Comprehensive Income due to Changes in Unrealized Gains and Losses, Net of Tax on Available-for-sale Fixed Maturities Securities	The difference between net income as reported and comprehensive income was due to the changes in unrealized gains and losses, net of taxes on fixed maturities securities. For the Three Months Ended September 30, 2019 2018 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive income Change in unrealized losses on investments, net $ 4,429 $ (1,060 ) $ 3,369 $ (2,895 ) $ 1,666 $ (1,229 ) Reclassification adjustment of realized losses (gains) included in net income (103 ) 25 (78 ) (5 ) (1 ) (6 ) Effect on other comprehensive income $ 4,326 $ (1,035 ) $ 3,291 $ (2,900 ) $ 1,665 $ (1,235 ) For the Nine Months Ended September 30, 2019 2018 Pre-tax Tax After-tax Pre-tax Tax After-tax (in thousands) Other comprehensive income Change in unrealized losses on investments, net $ 19,533 $ (4,677 ) $ 14,856 $ (9,918 ) $ 3,185 $ (6,733 ) Reclassification adjustment of realized losses (gains) included in net income 291 (70 ) 221 307 64 371 Effect on other comprehensive income $ 19,824 $ (4,747 ) $ 15,077 $ (9,611 ) $ 3,249 $ (6,362 )

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Components of Lease Costs	Components of our lease costs for the three and nine months ended September 30, 2019 are as follows (in thousands): Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Amortization of ROU assets - Finance leases $ 19 $ 58 Interest on lease liabilities - Finance leases 6 17 Variable lease cost (cost excluded from lease payments) 113 337 Operating lease cost (cost resulting from lease payments) 331 918 Total lease cost $ 469 $ 1,330
Supplemental Cash Flow Information and Non-Cash Activity Related to Operating and Financing Leases	Supplemental cash flow information and non-cash activity related to our operating and financing leases as of September 30, 2019 are as follows (in thousands): Nine Months Ended September 30, 2019 Finance lease - Operating cash flows $ 20 Finance lease - Financing cash flows $ 66 Operating lease - Operating cash flows (fixed payments) $ 613 Operating lease - Operating cash flows (liability reduction) $ 465
Supplemental Balance Sheet Information Related to Operating and Financing Leases	Supplemental balance sheet information related to our operating and financing leases as of September 30, 2019 are as follows (in thousands): Balance Sheet Classification September 30, 2019 Right-of-use assets - operating Other assets $ 6,567 Right-of-use assets - finance Other assets $ 323 Lease Liability (1) Accounts payable and other liabilities $ (8,293 ) Lease Liability - finance Accounts payable and other liabilities $ (342 ) (1) Includes $1.3 million in lease incentives received in the first quarter of 2019.
Weighted-Average Remaining Lease Term and Discount Rate for Operating and Financing Leases	Weighted-average remaining lease term and discount rate for our operating and financing leases as of September 30, 2019 are as follows: September 30, 2019 Weighted average lease term - Finance leases 3.91 yrs. Weighted average lease term - Operating leases 8.19 yrs. Weighted average discount rate - Finance leases 7.09 % Weighted average discount rate - Operating leases 5.32 %
Maturities of Lease Liabilities by Fiscal Year for Operating and Financing Leases	Maturities of lease liabilities by fiscal year for our operating and financing leases as of September 30, 2019 are as follows (in thousands): September 30, 2019 2019 remaining $ 380 2020 1,442 2021 1,401 2022 1,425 2023 1,371 2024 and thereafter 4,695 Total lease payments 10,714 Less: imputed interest (2,079 ) Present value of lease liabilities $ 8,635

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2019
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net consisted of the following at September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 (In thousands) Land $ 2,582 $ 2,582 Building 11,390 11,390 Computer hardware and software 5,539 4,901 Office furniture and equipment 1,973 1,397 Tenant and leasehold improvements 8,082 4,477 Vehicle fleet 789 854 Total, at cost 30,355 25,601 Less: accumulated depreciation and amortization (9,482 ) (7,603 ) Property and equipment, net $ 20,873 $ 17,998

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill (in thousands) Balance as of December 31, 2018 $ 152,459 Goodwill acquired — Impairment — Balance as of September 30, 2019 $ 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) 2019 remaining $ 1,927 2020 $ 6,365 2021 $ 6,351 2022 $ 6,351 2023 $ 6,351 2024 $ 6,351 Thereafter $ 35,558 Total $ 69,254 (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, 2019
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, 2019 2018 2019 2018 Basic earnings per share: Net income attributable to common stockholders (000's) $ 8,133 $ 5,989 $ 15,818 $ 23,227 Weighted average shares outstanding 29,109,962 25,631,871 29,329,742 25,663,415 Basic earnings per share: $ 0.28 $ 0.23 $ 0.54 $ 0.91 Diluted earnings per share: Net income attributable to common stockholders (000's) $ 8,133 $ 5,989 $ 15,818 $ 23,227 Weighted average shares outstanding 29,109,962 25,631,871 29,329,742 25,663,415 Weighted average dilutive shares 58,430 415,067 23,014 677,344 Total weighted average dilutive shares 29,168,392 26,046,938 29,352,756 26,340,759 Diluted earnings per share: $ 0.28 $ 0.23 $ 0.54 $ 0.88

Deferred Reinsurance Ceding C_2

Deferred Reinsurance Ceding Commission (Tables)	9 Months Ended
	Sep. 30, 2019
Insurance [Abstract]
Schedule of Activity with Regard to Deferred Reinsurance Ceding Commission	The table below depicts the activity with regard to deferred reinsurance ceding commission during the three and nine months ended September 30, 2019 and 2018. Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Beginning balance of deferred ceding commission income $ 34,705 $ 42,666 $ 44,996 $ 42,665 Ceding commission deferred 15,542 18,932 39,017 56,495 Less: ceding commission earned (15,062 ) (18,307 ) (48,828 ) (55,869 ) Ending balance of deferred ceding commission income $ 35,185 $ 43,291 $ 35,185 $ 43,291

Deferred Policy Acquisition C_2

Deferred Policy Acquisition Costs (Tables)	9 Months Ended
	Sep. 30, 2019
Insurance [Abstract]
Summary of Activity in Deferred Policy Acquisition Costs (DPAC)	The table below depicts the activity with regard to DPAC during the three and nine months ended September 30, 2019 and 2018. Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) Beginning Balance $ 74,064 $ 69,648 $ 73,055 $ 41,678 Policy acquisition costs deferred 26,856 12,108 100,757 68,048 Amortization (25,307 ) (6,054 ) (98,199 ) (34,024 ) Ending Balance $ 75,613 $ 75,702 $ 75,613 $ 75,702

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Components of Deferred Tax Assets (Liabilities)	The table below summarizes the significant components of our net deferred tax assets (liabilities): September 30, 2019 December 31, 2018 Deferred tax assets: (In thousands) Unearned premiums $ 10,752 $ 12,090 Unearned commission 8,426 10,733 Net operating loss 109 109 Tax-related discount on loss reserve 2,669 2,329 Unrealized loss — 2,631 Stock-based compensation 1,190 297 Accrued expenses 1,296 2,321 Other 2,466 1,443 Total deferred tax asset 26,908 31,953 Deferred tax liabilities: Deferred acquisition costs 18,107 17,494 Prepaid expenses 192 112 Unrealized gains 2,936 — Property and equipment 304 664 Note discount 468 710 Basis in purchased investments 114 163 Basis in purchased intangibles 17,564 18,982 Other 1,501 1,533 Total deferred tax liabilities 41,186 39,658 Net deferred tax liability $ (14,278 ) $ (7,705 )

Reinsurance (Tables)

Reinsurance (Tables)	9 Months Ended
	Sep. 30, 2019
Insurance [Abstract]
Schedule of Effect of Reinsurance Arrangements in Consolidated Statement of Income	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, 2019 and 2018: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (In thousands) (In thousands) Premium written: Direct $ 237,303 $ 233,613 $ 702,491 $ 701,643 Ceded (46,858 ) (102,651 ) (406,300 ) (411,634 ) Net $ 190,445 $ 130,962 $ 296,191 $ 290,009 Premiums earned: Direct $ 231,617 $ 234,164 $ 690,165 $ 692,298 Ceded (107,755 ) (115,926 ) (342,529 ) (356,748 ) Net $ 123,862 $ 118,238 $ 347,636 $ 335,550 Loss and Loss Adjustment Expenses Direct $ 108,788 $ 145,753 $ 383,354 $ 697,743 Ceded (38,736 ) (87,058 ) (176,864 ) (519,968 ) Net $ 70,052 $ 58,695 $ 206,490 $ 177,775

Reserve for Unpaid Losses (Tabl

Reserve for Unpaid Losses (Tables)	9 Months Ended
	Sep. 30, 2019
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, 2019 2018 2019 2018 (In thousands) Balance, beginning of period $ 430,413 $ 488,610 $ 432,359 $ 470,083 Less: reinsurance recoverable on unpaid losses 223,023 315,308 250,506 315,353 Net balance, beginning of period 207,390 173,302 181,853 154,730 Incurred related to: Current year 73,448 61,900 208,796 163,115 Prior years (396 ) (3,205 ) (2,306 ) 14,660 Total incurred 73,052 58,695 206,490 177,775 Paid related to: Current year 53,920 19,544 94,075 41,361 Prior years 17,820 17,585 85,566 96,276 Total paid 71,740 37,129 179,641 137,637 Net balance, end of period 208,702 194,868 208,702 194,868 Plus: reinsurance recoverable on unpaid losses 208,884 226,227 208,884 226,227 Balance, end of period $ 417,586 $ 421,095 $ 417,586 $ 421,095

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2019
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, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 (in thousands) Convertible debt $ 23,413 $ 29,163 Mortgage loan 12,188 12,394 Term loan facility 71,250 75,000 Revolving credit facility 10,000 20,000 FHLB loan agreement 19,200 19,200 Total principal amount $ 136,051 $ 155,757 Less: unamortized discount and issuance costs $ 5,202 $ 6,963 Total long-term debt $ 130,849 $ 148,794
Schedule of Principal Payments on Long-Term Debt	The schedule of principal payments on long-term debt is as follows: Year Amount (In thousands) 2019 remaining $ 3,821 2020 7,790 2021 7,806 2022 7,822 2023 74,589 Thereafter 34,223 Total $ 136,051

Accounts Payable and Other Li_2

Accounts Payable and Other Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Other Liabilities Disclosure [Abstract]
Schedule of Accounts Payable and Other Liabilities	Accounts payable and other liabilities consist of the following as of September 30, 2019 and December 31, 2018: Description September 30, 2019 December 31, 2018 (In thousands) Deferred ceding commission $ 35,185 $ 44,996 Outstanding claim checks — 15,360 Accounts payable and other payables 7,096 8,379 Lease obligations 8,635 — Accrued interest and issuance costs 1,476 1,285 Accrued dividends 1,772 1,589 Premium tax — 2,241 Other liabilities 37 460 Commission payables 12,228 11,654 Total other liabilities $ 66,428 $ 85,964

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Restricted Stock Activity	Weighted-Average Grant-Date Fair Number of shares Value per Share Non-vested, at December 31, 2018 605,801 $ 19.30 Granted — — Vested (22,647 ) 14.28 Canceled and surrendered (12,620 ) 14.24 Non-vested, at September 30, 2019 570,534 $ 19.61

Basis of Presentation and Sig_3

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions	Mar. 31, 2019USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Right-of-use assets	$ 2.8
Lease liabilities	$ 2.8

Investments - Schedule of Diffe

Investments - Schedule of Difference between Cost or Adjusted/Amortized Cost and Estimated Fair Value, by Major Investment Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost	$ 604,821	$ 518,391
Fixed maturity securities, available-for-sale, Gross Unrealized Gains	11,511	377
Fixed maturity securities, available-for-sale, Gross Unrealized Losses	248	9,119
Fixed maturity securities, available-for-sale, Fair Value	616,084	509,649
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost	62,492	48,739
Fixed maturity securities, available-for-sale, Gross Unrealized Gains	521	40
Fixed maturity securities, available-for-sale, Gross Unrealized Losses	24	738
Fixed maturity securities, available-for-sale, Fair Value	62,989	48,041
States, Municipalities and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost	79,141	60,028
Fixed maturity securities, available-for-sale, Gross Unrealized Gains	2,090	46
Fixed maturity securities, available-for-sale, Gross Unrealized Losses	20	785
Fixed maturity securities, available-for-sale, Fair Value	81,211	59,289
Special Revenue [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost	264,897	249,026
Fixed maturity securities, available-for-sale, Gross Unrealized Gains	4,782	210
Fixed maturity securities, available-for-sale, Gross Unrealized Losses	160	3,881
Fixed maturity securities, available-for-sale, Fair Value	269,519	245,355
Industrial and Miscellaneous [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost	198,291	155,678
Fixed maturity securities, available-for-sale, Gross Unrealized Gains	4,118	81
Fixed maturity securities, available-for-sale, Gross Unrealized Losses	44	3,302
Fixed maturity securities, available-for-sale, Fair Value	$ 202,365	152,457
Redeemable Preferred Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost		4,920
Fixed maturity securities, available-for-sale, Gross Unrealized Losses		413
Fixed maturity securities, available-for-sale, Fair Value		$ 4,507

Investments - Schedule of Dif_2

Investments - Schedule of Difference between Cost or Adjusted/Amortized Cost and Estimated Fair Value, by Major Investment Category (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 616,084	$ 509,649
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	62,989	48,041
U.S. government and agency securities [Member] | Pledged securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 24,500	$ 31,000

Investments - Schedule of Net R

Investments - Schedule of Net Realized Gains (Losses) by Major Investment Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Available-for-sale Securities [Line Items]
Total realized gains	$ 108	$ 1	$ 2,281	$ 79
Total realized losses		(8)	(143)	(422)
Net realized gains and (losses)	108	(7)	2,138	(343)
Total realized gains, Fair Value at Sale	43,255	173	67,747	27,612
Total realized losses, Fair Value at Sale	2,317	263	4,985	53,218
Net realized gain and (losses), Fair Value at Sale	45,572	436	72,732	80,830
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total realized gains	108		958	78
Total realized losses			(76)	(237)
Total realized gains, Fair Value at Sale	43,255	15	45,143	27,443
Total realized losses, Fair Value at Sale	$ 2,317		2,611	49,025
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total realized gains		1	1,323	1
Total realized losses		(8)	(67)	(185)
Total realized gains, Fair Value at Sale		173	22,604	169
Total realized losses, Fair Value at Sale		$ 263	$ 2,374	$ 4,193

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Investments [Line Items]
Other revenue	$ 3,377,000	$ 3,333,000	$ 10,878,000	$ 11,273,000
Net realized and unrealized gains (losses)	805,000	(123,000)	3,132,000	(1,234,000)
Proceeds from sale of marketable securities	0	428,000	26,521,000	4,209,000
Gross gain from sales of marketable securities		7,900	2,400,000	1,100
Gross loss from sales of marketable securities		14,700	1,200,000	184,500
Unrealized gain (losses) on investment securities			993,600
Other Investments, estimated fair value	27,372,000		27,372,000		$ 2,488,000
Investments	645,074,000		645,074,000		$ 528,593,000
Cash distributions, net of allocation received	272,000	94,000
Investment allocated cost	741,000	429,000	1,958,000	1,595,000
LLCs [Member]
Investments [Line Items]
Other Investments, estimated fair value	6,400,000		6,400,000
LPs [Member]
Investments [Line Items]
Other Investments, estimated fair value	21,000,000		21,000,000
LPs and LLCs [Member]
Investments [Line Items]
Investments	24,900,000		24,900,000
Investment allocated cost	$ 565,000	1,300
Net investment gains			$ 1,000,000
Reclassification [Member]
Investments [Line Items]
Other revenue		128,000		927,000
Net realized and unrealized gains (losses)		$ (128,000)		$ (927,000)

Investments - Schedule of Amort

Investments - Schedule of Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Maturity date Due in one year or less, Cost or Amortized Cost	$ 67,878
Maturity date Due after one year through five years, Cost or Amortized Cost	199,455
Maturity date Due after five years through ten years, Cost or Amortized Cost	139,435
Maturity date Due after ten years, Cost or Amortized Cost	198,053
Fixed maturity securities, available-for-sale, Cost or Adjusted / Amortized Cost	$ 604,821	$ 518,391
Maturity date Due in one year or less, Percentage of Total	11.00%
Maturity date Due after one year through five years, Percentage of Total	33.00%
Maturity date Due after five years through ten years, Percentage of Total	23.00%
Maturity date Due after ten years, Percentage of Total	33.00%
Maturity date Total, Percentage	100.00%
Maturity date Due in one year or less, Fair Value	$ 68,007
Maturity date Due after one year through five years, Fair Value	201,696
Maturity date Due after five years through ten years, Fair Value	144,386
Maturity date Due after ten years, Fair Value	201,995
Maturity date Total, Fair Value	$ 616,084	$ 509,649
Maturity date Due in one year or less, Percentage of Total	11.00%
Maturity date Due after one year through five years, Percentage of Total	33.00%
Maturity date Due after five years through ten years, Percentage of Total	23.00%
Maturity date Due after ten years, Percentage of Total	33.00%
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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	$ 4,396	$ 4,276	$ 13,115	$ 11,299
Less: Investment expenses	741	429	1,958	1,595
Net investment income, less investment expenses	3,655	3,847	11,157	9,704
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	3,492	3,020	10,625	8,018
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	22	547	944	1,252
Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	558	284	1,288	861
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income (loss)	$ 324	$ 425	$ 258	$ 1,168

Investments - Aging of Gross Un

Investments - Aging of Gross Unrealized Losses on Fixed Maturity Investments (Detail) $ in Thousands	Sep. 30, 2019USD ($)Security	Dec. 31, 2018USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Number of Securities | Security	78	404
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Gross Unrealized Losses	$ 52	$ 3,164
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Fair Value	$ 25,657	$ 172,381
Fixed maturity securities, available-for-sale, Twelve Months or More, Number of Securities | Security	183	690
Fixed maturity securities, available-for-sale, Twelve Months or More, Gross Unrealized Losses	$ 196	$ 5,955
Fixed maturity securities, available-for-sale Twelve Months or More, Fair Value	$ 35,698	$ 241,126
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Number of Securities | Security	4	17
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Gross Unrealized Losses	$ 2	$ 129
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Fair Value	$ 450	$ 10,485
Fixed maturity securities, available-for-sale, Twelve Months or More, Number of Securities | Security	25	66
Fixed maturity securities, available-for-sale, Twelve Months or More, Gross Unrealized Losses	$ 22	$ 609
Fixed maturity securities, available-for-sale Twelve Months or More, Fair Value	$ 4,523	$ 20,488
States, Municipalities and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Number of Securities | Security	2	13
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Gross Unrealized Losses	$ 14	$ 103
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Fair Value	$ 6,026	$ 12,864
Fixed maturity securities, available-for-sale, Twelve Months or More, Number of Securities | Security	4	42
Fixed maturity securities, available-for-sale, Twelve Months or More, Gross Unrealized Losses	$ 6	$ 682
Fixed maturity securities, available-for-sale Twelve Months or More, Fair Value	$ 2,456	$ 39,979
Special Revenue [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Number of Securities | Security	52	105
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Gross Unrealized Losses	$ 22	$ 1,260
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Fair Value	$ 13,154	$ 76,335
Fixed maturity securities, available-for-sale, Twelve Months or More, Number of Securities | Security	123	323
Fixed maturity securities, available-for-sale, Twelve Months or More, Gross Unrealized Losses	$ 138	$ 2,621
Fixed maturity securities, available-for-sale Twelve Months or More, Fair Value	$ 18,524	$ 108,319
Industrial and Miscellaneous [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Number of Securities | Security	20	214
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Gross Unrealized Losses	$ 14	$ 1,479
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Fair Value	$ 6,027	$ 70,156
Fixed maturity securities, available-for-sale, Twelve Months or More, Number of Securities | Security	31	232
Fixed maturity securities, available-for-sale, Twelve Months or More, Gross Unrealized Losses	$ 30	$ 1,822
Fixed maturity securities, available-for-sale Twelve Months or More, Fair Value	$ 10,195	$ 70,375
Redeemable Preferred Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Number of Securities | Security		55
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Gross Unrealized Losses		$ 193
Fixed maturity securities, available-for-sale, Less Than Twelve Months, Fair Value		$ 2,541
Fixed maturity securities, available-for-sale, Twelve Months or More, Number of Securities | Security		27
Fixed maturity securities, available-for-sale, Twelve Months or More, Gross Unrealized Losses		$ 221
Fixed maturity securities, available-for-sale Twelve Months or More, Fair Value		$ 1,965

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment exit load percentage within one year which expires in February 2020			3.00%
Nonrecurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Non-recurring fair value adjustments	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	$ 616,084	$ 509,649
Investments reported at NAV	28,990	3,910
Total investments	645,074	528,593
Equity securities		15,034
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	366	4,861
Total investments	366	19,895
Equity securities		15,034
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	615,718	504,788
Total investments	615,718	504,788
U.S. government and agency securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	62,989	48,041
U.S. government and agency securities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	366	354
U.S. government and agency securities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	62,623	47,687
States, Municipalities and Political Subdivisions [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	81,211	59,289
States, Municipalities and Political Subdivisions [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	81,211	59,289
Special Revenue [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	269,519	245,355
Special Revenue [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	269,519	245,355
Industrial and Miscellaneous [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	202,365	152,457
Industrial and Miscellaneous [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value	$ 202,365	152,457
Redeemable Preferred Stocks [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value		4,507
Redeemable Preferred Stocks [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities, available-for-sale, Fair Value		4,507
Common Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities		2,264
Common Stock [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities		2,264
Nonredeemable Preferred Stocks [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities		12,770
Nonredeemable Preferred Stocks [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities		$ 12,770

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Federal Home Loan Bank (FHLB) stock, at cost	$ 1,618	$ 1,422

Other Comprehensive Income - Ad

Other Comprehensive Income - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Comprehensive Income Net Of Tax [Abstract]
Other comprehensive income	$ 3,291	$ (1,235)	$ 15,077	$ (6,362)

Other Comprehensive Income - Ef

Other Comprehensive Income - Effect on Other Comprehensive Income due to Changes in Unrealized Gains and Losses, Net of Taxes on Fixed Maturities Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other comprehensive income
Change in unrealized losses on investments, net, Pre-tax	$ 4,429	$ (2,895)	$ 19,533	$ (9,918)
Reclassification adjustment of realized losses (gains) included in net income, Pre-tax	(103)	(5)	291	307
Effect on other comprehensive income, Pre-tax	4,326	(2,900)	19,824	(9,611)
Change in unrealized losses on investments, net, Tax	(1,060)	1,666	(4,677)	3,185
Reclassification adjustment of realized losses (gains) included in net income, Tax	25	(1)	(70)	64
Effect on other comprehensive income, Tax	(1,035)	1,665	(4,747)	3,249
Change in unrealized losses on investments, net, After-tax	3,369	(1,229)	14,856	(6,733)
Reclassification adjustment of realized losses (gains) included in net income, After-tax	(78)	(6)	221	371
Effect on other comprehensive income, After-tax	$ 3,291	$ (1,235)	$ 15,077	$ (6,362)

Leases - Additional Information

Leases - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019
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, 2019	Sep. 30, 2019
Leases [Abstract]
Amortization of ROU assets - Finance leases	$ 19	$ 58
Interest on lease liabilities - Finance leases	6	17
Variable lease cost (cost excluded from lease payments)	113	337
Operating lease cost (cost resulting from lease payments)	331	918
Total lease cost	$ 469	$ 1,330

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information and Non-Cash Activity Related to Operating and Financing Leases (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Leases [Abstract]
Finance lease - Operating cash flows	$ 20
Finance lease - Financing cash flows	66
Operating lease - Operating cash flows (fixed payments)	613
Operating lease - Operating cash flows (liability reduction)	$ 465

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information Related to Operating and Financing Leases (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Right-of-use assets - operating	$ 6,567
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Right-of-use assets - finance	$ 323
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Lease Liability - operating	$ (8,293)
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities
Lease Liability - finance	$ (342)
Finance Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities

Leases - Supplemental Balance_2

Leases - Supplemental Balance Sheet Information Related to Operating and Financing Leases (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Lease incentives received	$ 1.3

Leases - Weighted-Average Remai

Leases - Weighted-Average Remaining Lease Term and Discount Rate for Operating and Financing Leases (Detail)	Sep. 30, 2019
Leases [Abstract]
Weighted average lease term - Finance leases	3 years 10 months 28 days
Weighted average lease term - Operating leases	8 years 2 months 8 days
Weighted average discount rate - Finance leases	7.09%
Weighted average discount rate - Operating leases	5.32%

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities by Fiscal Year for Operating and Financing Leases (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
2019 remaining	$ 380
2020	1,442
2021	1,401
2022	1,425
2023	1,371
2024 and thereafter	4,695
Total lease payments	10,714
Less: imputed interest	(2,079)
Present value of lease liabilities	$ 8,635

Property and Equipment, Net - S

Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total, at cost	$ 30,355	$ 25,601
Less: accumulated depreciation and amortization	(9,482)	(7,603)
Property and equipment, net	20,873	17,998
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	11,390	11,390
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	5,539	4,901
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	1,973	1,397
Tenant and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	8,082	4,477
Vehicle Fleet [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	$ 789	$ 854

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)Building	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)aft²Building	Sep. 30, 2018USD ($)
Property Plant And Equipment Useful Life And Values [Abstract]
Depreciation and amortization expense | $	$ 649,000	$ 1,000,000	$ 1,900,000	$ 1,700,000
Number of acres of land purchased | a			15
Number of buildings | Building	5		5
Gross area of acquired property | ft²			229,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 152,459,000		$ 152,459,000		$ 152,459,000
Intangibles, net	70,569,000		70,569,000		$ 76,850,000
Indefinite lived intangible, insurance licenses	1,300,000		1,300,000
Amortization of intangible assets	2,100,000	$ 6,400,000	6,300,000	$ 19,700,000
Impairment of amortizing intangible assets	0	0	0	0
Impairment of non-amortizing intangible assets	$ 0	$ 0	$ 0	$ 0
Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Useful life of intangible asset			2 years 6 months
Finite-lived intangible assets useful lives			2 years 6 months
Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Useful life of intangible asset			15 years
Finite-lived intangible assets useful lives			15 years

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	Sep. 30, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 152,459
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, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2019 remaining	$ 1,927
2020	6,365
2021	6,351
2022	6,351
2023	6,351
2024	6,351
Thereafter	35,558
Total	$ 69,254

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization of Intangible Assets (Parenthetical) (Details) $ in Millions	Sep. 30, 2019USD ($)
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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic earnings per share:
Net income attributable to common stockholders (000's)	$ 8,133	$ 5,989	$ 15,818	$ 23,227
Weighted average shares outstanding	29,109,962	25,631,871	29,329,742	25,663,415
Basic earnings per share:	$ 0.28	$ 0.23	$ 0.54	$ 0.91
Diluted earnings per share:
Net income attributable to common stockholders (000's)	$ 8,133	$ 5,989	$ 15,818	$ 23,227
Weighted average shares outstanding	29,109,962	25,631,871	29,329,742	25,663,415
Weighted average dilutive shares	58,430	415,067	23,014	677,344
Total weighted average dilutive shares	29,168,392	26,046,938	29,352,756	26,340,759
Diluted earnings per share:	$ 0.28	$ 0.23	$ 0.54	$ 0.88

Deferred Reinsurance Ceding C_3

Deferred Reinsurance Ceding Commission - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Policy Acquisition Costs [Member]
Deferred Reinsurance Ceding Commission [Line Items]
Ceding commission income	$ 11.3	$ 13.7	$ 36.8	$ 42.1
General and Administrative Expenses [Member]
Deferred Reinsurance Ceding Commission [Line Items]
Ceding commission income	$ 3.7	$ 4.5	$ 12	$ 13.8

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Insurance [Abstract]
Beginning balance of deferred ceding commission income	$ 34,705	$ 42,666	$ 44,996	$ 42,665
Ceding commission deferred	15,542	18,932	39,017	56,495
Less: ceding commission earned	(15,062)	(18,307)	(48,828)	(55,869)
Ending balance of deferred ceding commission income	$ 35,185	$ 43,291	$ 35,185	$ 43,291

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Insurance [Abstract]
Beginning Balance	$ 74,064	$ 69,648	$ 73,055	$ 41,678
Policy acquisition costs deferred	26,856	12,108	100,757	68,048
Amortization	(25,307)	(6,054)	(98,199)	(34,024)
Ending Balance	$ 75,613	$ 75,702	$ 75,613	$ 75,702

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 2,950,000	$ 3,002,000	$ 5,687,000	$ 9,068,000
Annual effective tax rate	26.60%	33.40%	26.40%	28.10%
Uncertain tax positions	$ 0		$ 0		$ 0

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Deferred tax assets:
Unearned premiums	$ 10,752	$ 12,090
Unearned commission	8,426	10,733
Net operating loss	109	109
Tax-related discount on loss reserve	2,669	2,329
Unrealized loss		2,631
Stock-based compensation	1,190	297
Accrued expenses	1,296	2,321
Other	2,466	1,443
Total deferred tax asset	26,908	31,953
Deferred tax liabilities:
Deferred acquisition costs	18,107	17,494
Prepaid expenses	192	112
Unrealized gains	2,936
Property and equipment	304	664
Note discount	468	710
Basis in purchased investments	114	163
Basis in purchased intangibles	17,564	18,982
Other	1,501	1,533
Total deferred tax liabilities	41,186	39,658
Net deferred tax liability	$ (14,278)	$ (7,705)

Reinsurance - Additional inform

Reinsurance - Additional information (Detail)	9 Months Ended
	Sep. 30, 2019
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 - 2019-2020 Excess

Reinsurance - 2019-2020 Excess of Loss Reinsurance Programs - Catastrophe Excess of Loss Reinsurance - Additional information - (Detail) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Purchase of reinsurance from third party	$ 107,755,000	$ 115,926,000	$ 342,529,000	$ 356,748,000
Reinsurance payable	254,152,000		$ 254,152,000		$ 166,975,000
FHCF [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Percentage comprising aggregate participation			90.00%		45.00%
2019-2020 Excess of Loss Reinsurance Programs [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance purchase limit	2,600,000,000		$ 2,600,000,000
Purchase of reinsurance from third party			2,600,000,000
Reinsurance payable	249,200,000		249,200,000
2019-2020 Excess of Loss Reinsurance Programs [Member] | NBIC [Member] | First Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
First event retention for insurance company subsidiary	13,800,000		13,800,000
2019-2020 Excess of Loss Reinsurance Programs [Member] | NBIC [Member] | First Catastrophic Event [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage			936,000,000
2019-2020 Excess of Loss Reinsurance Programs [Member] | Heritage P&C [Member] | First Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
First event retention for insurance company subsidiary	20,000,000		20,000,000
2019-2020 Excess of Loss Reinsurance Programs [Member] | Heritage P&C [Member] | First Catastrophic Event [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage			1,500,000,000
2019-2020 Excess of Loss Reinsurance Programs [Member] | Zephyr [Member] | First Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
First event retention for insurance company subsidiary	$ 20,000,000		20,000,000
2019-2020 Excess of Loss Reinsurance Programs [Member] | Zephyr [Member] | First Catastrophic Event [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage			$ 708,000,000

Reinsurance - 2019-2020 Exces_2

Reinsurance - 2019-2020 Excess of Loss Reinsurance Programs - Gross Quota and Net Quota Share Reinsurance - Additional information - (Detail) - NBIC [Member] - USD ($) $ in Millions	5 Months Ended	7 Months Ended	9 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Gross Quota Share [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Percentage of gross quota share	18.75%	8.00%
Reinsurance recoveries on paid losses		$ 1,000		$ 1,000
Net Quota Share Reinsurance [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Net lines quota share occurrence limit			$ 20	$ 20
Percentage of renewed ceded net premium and losses		52.00%		52.00%	10.00%

Reinsurance - 2019-2020 Exces_3

Reinsurance - 2019-2020 Excess of Loss Reinsurance Programs - Aggregate Coverage - Additional information - (Detail) $ in Thousands	Dec. 31, 2018USD ($)Reinsurer	Sep. 30, 2019USD ($)Reinsurer	Dec. 31, 2018USD ($)Reinsurer
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Prepaid reinsurance premiums	$ 233,071	$ 270,645	$ 233,071
Number of reinstatements available | Reinsurer		2	2
Aggregate Coverage [Member] | Catastrophe [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Purchased aggregate reinstatement premium		$ 931,000	$ 1,100,000
Prepaid reinsurance premiums	669,000	627,000	669,000
Net of prepaid reinsurance premium as attachment point	40,000	$ 40,000	$ 40,000
40.00% Aggregate Coverage [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit	20,000
Primary retention	20,000
Franchise deductible amount	$ 1,000
Aggregate contract expiration date	May 31, 2019
Percentage of aggregate contract	40.00%		40.00%
100.00% Aggregate Coverage [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit	$ 20,000
Primary retention	$ 20,000
Aggregate contract expiration date	Dec. 31, 2019
Percentage of aggregate contract	100.00%		100.00%
Number of reinstatements available | Reinsurer	1

Reinsurance - 2019-2020 Exces_4

Reinsurance - 2019-2020 Excess of Loss Reinsurance Programs - Additional information - (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)ReinsurerLayer	Dec. 31, 2018USD ($)Reinsurer	Jun. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Unpaid losses and loss adjustment expenses	$ 417,586,000	$ 432,359,000	$ 430,413,000	$ 421,095,000	$ 488,610,000	$ 470,083,000
Reinsurance payable	$ 254,152,000	$ 166,975,000
Number of reinstatements available | Reinsurer	2	2
Facultative Reinsurance [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable	$ 10,000,000	$ 10,000,000
Facultative Reinsurance [Member] | Minimum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Facultative reinsurance purchase amount	$ 10,000,000	10,000,000
General Excess of Loss 2019-2020 Reinsurance Program [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Number of loss applied to reinsurance contract | Reinsurer	1
Number of layers in excess of rentention loss | Layer	2
Retention under program to provide reinsurance coverage	$ 400,000
General Excess of Loss 2019-2020 Reinsurance Program [Member] | NBIC [Member] | First Layer Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage	350,000
Primary retention	400,000
General Excess of Loss 2019-2020 Reinsurance Program [Member] | NBIC [Member] | Second Layer Coverage
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage	2,750,000
Primary retention	750,000
General Excess of Loss 2019-2020 Reinsurance Program [Member] | NBIC [Member] | Casualty Second Layer [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage	1,250,000
Primary retention	$ 750,000
General Excess of Loss 2019-2020 Reinsurance Program [Member] | NBIC [Member] | First and Second Layer Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Percentage of gross quota share	100.00%
Facultative 2019 - 2020 Excess of Loss Reinsurance Program [Member] | Minimum [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable	$ 3,500,000
Northeast Commercial Residential Losses [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] | Northeast Commercial Residential Losses [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Unpaid losses and loss adjustment expenses	750,000
Property Per Risk Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Coverage limit	9,000,000	9,000,000
Reinsurance payable	27,000,000	$ 27,000,000
Property Per Risk Coverage [Member] | Northeast Commercial Residential Losses [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Coverage limit	250,000
Reinsurance payable	$ 750,000

Reinsurance - 2018-2019 Reinsur

Reinsurance - 2018-2019 Reinsurance Programs - Catastrophe Excess of Loss Reinsurance - Additional information - (Detail) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Purchase of reinsurance from third party	$ 107,755,000	$ 115,926,000	$ 342,529,000	$ 356,748,000
Reinsurance payable	$ 254,152,000		$ 254,152,000		$ 166,975,000
FHCF [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Percentage comprising aggregate participation			90.00%		45.00%
2018 - 2019 Reinsurance Program [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance purchase limit					$ 3,400,000,000
Purchase of reinsurance from third party					3,500,000,000
Reinsurance payable					252,000,000
2018 - 2019 Reinsurance Program [Member] | NBIC [Member] | First Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
First event retention for insurance company subsidiary					12,800,000
2018 - 2019 Reinsurance Program [Member] | NBIC [Member] | First Catastrophic Event [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage					1,000,000,000
2018 - 2019 Reinsurance Program [Member] | NBIC [Member] | Second Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage					8,800,000
2018 - 2019 Reinsurance Program [Member] | Heritage P&C [Member] | First Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
First event retention for insurance company subsidiary					20,000,000
2018 - 2019 Reinsurance Program [Member] | Heritage P&C [Member] | First Catastrophic Event [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage					1,600,000,000
2018 - 2019 Reinsurance Program [Member] | Heritage P&C [Member] | Second Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage					16,000,000
2018 - 2019 Reinsurance Program [Member] | Zephyr [Member] | First Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
First event retention for insurance company subsidiary					20,000,000
2018 - 2019 Reinsurance Program [Member] | Zephyr [Member] | First Catastrophic Event [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage					801,000,000
2018 - 2019 Reinsurance Program [Member] | Zephyr [Member] | Second Catastrophic Event [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage					$ 16,000,000

Reinsurance - 2018-2019 Reins_2

Reinsurance - 2018-2019 Reinsurance Programs - Gross Quota and Net Quota Share Reinsurance - Additional information - (Detail) - NBIC [Member] - USD ($) $ in Millions	5 Months Ended	7 Months Ended	9 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Gross Quota Share [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Percentage of gross quota share	18.75%	8.00%
Reinsurance recoveries on paid losses		$ 1,000		$ 1,000
Net Quota Share Reinsurance [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Net lines quota share occurrence limit			$ 20	$ 20
Percentage of ceded net premium and losses		49.50%		49.50%	8.00%
Percentage of renewed ceded net premium and losses		52.00%		52.00%	10.00%

Reinsurance - 2018-2019 Reins_3

Reinsurance - 2018-2019 Reinsurance Programs - Aggregate Coverage - Additional information - (Detail) $ in Thousands	Dec. 31, 2018USD ($)Reinsurer	May 31, 2018USD ($)	Sep. 30, 2019USD ($)Reinsurer	Dec. 31, 2018USD ($)Reinsurer
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Prepaid reinsurance premiums	$ 233,071		$ 270,645	$ 233,071
Number of reinstatements available | Reinsurer			2	2
Aggregate Coverage [Member] | Catastrophe [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Purchased aggregate reinstatement premium			$ 931,000	$ 1,100,000
Prepaid reinsurance premiums	669,000		627,000	669,000
Net of prepaid reinsurance premium as attachment point	40,000		$ 40,000	$ 40,000
42.50% Aggregate Coverage [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit		$ 20,000
Primary retention		3,000
Franchise deductible amount		$ 1,500
Aggregate contract expiration date		Dec. 31, 2018
Percentage of aggregate contract		42.50%
92.00% Aggregate Coverage [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit		$ 20,000
Primary retention		$ 20,000
Aggregate contract expiration date		Dec. 31, 2018
Percentage of aggregate contract		92.00%
40.00% Aggregate Coverage [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit	20,000
Primary retention	20,000
Franchise deductible amount	$ 1,000
Aggregate contract expiration date	May 31, 2019
Percentage of aggregate contract	40.00%			40.00%
100.00% Aggregate Coverage [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Aggregate contract coverage limit	$ 20,000
Primary retention	$ 20,000
Number of reinstatements available | Reinsurer	1
Aggregate contract expiration date	Dec. 31, 2019
Percentage of aggregate contract	100.00%			100.00%

Reinsurance - 2018-2019 Reins_4

Reinsurance - 2018-2019 Reinsurance Programs - Additional information - (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)Reinsurer	Dec. 31, 2018USD ($)ReinsurerLayer	Jun. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Unpaid losses and loss adjustment expenses	$ 417,586,000	$ 432,359,000	$ 430,413,000	$ 421,095,000	$ 488,610,000	$ 470,083,000
Reinsurance payable	$ 254,152,000	$ 166,975,000
Number of reinstatements available | Reinsurer	2	2
Facultative Reinsurance [Member] | Maximum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable	$ 10,000,000	$ 10,000,000
Facultative Reinsurance [Member] | Minimum [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Facultative reinsurance purchase amount	10,000,000	$ 10,000,000
General Excess of Loss 2018-2019 Reinsurance Program [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Number of loss applied to reinsurance contract | Reinsurer		1
Number of layers in excess of rentention loss | Layer		2
Retention under program to provide reinsurance coverage		$ 300,000
General Excess of Loss 2018-2019 Reinsurance Program [Member] | NBIC [Member] | First Layer Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage		450,000
Primary retention		300,000
General Excess of Loss 2018-2019 Reinsurance Program [Member] | NBIC [Member] | Second Layer Coverage
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage		2,750,000
Primary retention		750,000
General Excess of Loss 2018-2019 Reinsurance Program [Member] | NBIC [Member] | Casualty Second Layer [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Retention under program to provide reinsurance coverage		1,250,000
Primary retention		$ 750,000
General Excess of Loss 2018-2019 Reinsurance Program [Member] | NBIC [Member] | First and Second Layer Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Percentage of gross quota share		92.00%
Additional coverage percentage of gross quota share		8.00%
Facultative 2018 - 2019 Reinsurance Program [Member] | Minimum [Member] | NBIC [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance payable		$ 3,500,000
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
Property Per Risk Coverage [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Coverage limit	9,000,000	9,000,000
Reinsurance payable	$ 27,000,000	$ 27,000,000

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Premiums Written
Premiums Written, Direct	$ 237,303	$ 233,613	$ 702,491	$ 701,643
Premiums Written, Ceded	(46,858)	(102,651)	(406,300)	(411,634)
Premiums Written, Net	190,445	130,962	296,191	290,009
Premiums Earned
Premiums Earned, Direct	231,617	234,164	690,165	692,298
Premiums Earned, Ceded	(107,755)	(115,926)	(342,529)	(356,748)
Net premiums earned	123,862	118,238	347,636	335,550
Losses and Loss Adjustment Expenses
Losses and Loss Adjustment Expenses, Direct	108,788	145,753	383,354	697,743
Losses and Loss Adjustment Expenses, Ceded	(38,736)	(87,058)	(176,864)	(519,968)
Losses and Loss Adjustment Expenses, Net	$ 70,052	$ 58,695	$ 206,490	$ 177,775

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Insurance [Abstract]
Balance, beginning of period	$ 430,413	$ 488,610	$ 432,359	$ 470,083
Less: reinsurance recoverable on unpaid losses	223,023	315,308	250,506	315,353
Net balance, beginning of period	207,390	173,302	181,853	154,730
Incurred related to:
Current year	73,448	61,900	208,796	163,115
Prior years	(396)	(3,205)	(2,306)	14,660
Total incurred	73,052	58,695	206,490	177,775
Paid related to:
Current year	53,920	19,544	94,075	41,361
Prior years	17,820	17,585	85,566	96,276
Total paid	71,740	37,129	179,641	137,637
Net balance, end of period	208,702	194,868	208,702	194,868
Plus: reinsurance recoverable on unpaid losses	208,884	226,227	208,884	226,227
Balance, end of period	$ 417,586	$ 421,095	$ 417,586	$ 421,095

Reserve for Unpaid Losses - Add

Reserve for Unpaid Losses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Insurance [Abstract]
Unpaid losses and loss adjustment expenses	$ 208,702	$ 194,868	$ 208,702	$ 194,868	$ 207,390	$ 181,853	$ 173,302	$ 154,730
Unpaid losses and loss adjustment expenses attributable to IBNR net of reinsurance recoverables	$ 158,200		$ 158,200
Net reserves for unpaid losses and loss adjustment expenses, percentage	75.80%		75.80%
Losses incurred favorable development	$ (396)	$ (3,205)	$ (2,306)	$ 14,660

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	Feb. 19, 2019	Dec. 31, 2018	Oct. 31, 2017	Mar. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Aug. 31, 2017
Debt Instrument [Line Items]
Long-term debt, net		$ 148,794,000			$ 130,849,000
Issuance and debt discount costs		$ 6,963,000			5,202,000
Convertible notes converted into common stock				$ 4,210,000
Payout dividends, aggregate amount					5,188,000	$ 4,789,000
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					452,000
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			1,400,000
Estimated fair value of collateral with FHLB					24,500,000
Federal Home Loan Bank Des Moines [Member]
Debt Instrument [Line Items]
Required fair value of reinvestment in FHLB common stock.					140,200
Federal Home Loan Bank Boston [Member]
Debt Instrument [Line Items]
Required fair value of reinvestment in FHLB common stock.					$ 76,600
Convertible Note [Member] | Heritage Insurance Holdings, Inc. [Member]
Debt Instrument [Line Items]
Repurchase of convertible notes	$ 5,800,000
Cash consideration paid for repurchase of debt	$ 2,900,000
Shares issued for consideration of repurchase debt	285,201
Convertible notes converted into common stock	$ 4,200,000
Non-operating loss extinguishment of debt	$ (48,000)
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount							$ 136,800,000	$ 136,800,000
Interest rate							5.875%	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, commencing in 2018.
Long-term debt, net					$ 21,100,000
Issuance and debt discount costs					2,300,000
Interest paid					1.5	7,700,000
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] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount		75,000,000		$ 1,900,000
Interest paid					2,300,000
Maximum borrowing capacity		75,000,000
Aggregate principal amount					$ 71,300,000
Effective interest rate					5.625%
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount		20,000,000
Interest paid					$ 421,000
Maximum borrowing capacity		$ 50,000,000			50,000,000
Outstanding borrowing capacity amount					10,000,000
Letters of credit outstanding amount					$ 0
Effective interest rate					5.3125%
Senior Secured Credit Facility [Member] | Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 5,000,000
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
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, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal amount	$ 136,051	$ 155,757
Less: unamortized discount and issuance costs	5,202	6,963
Total long-term debt	130,849	148,794
Term Loan Facility [Member]
Debt Instrument [Line Items]
Principal amount	71,250	75,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	10,000	20,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Principal amount	23,413	29,163
FHLB Loan Agreement [Member]
Debt Instrument [Line Items]
Principal amount	19,200	19,200
Mortgage Loan [Member]
Debt Instrument [Line Items]
Principal amount	$ 12,188	$ 12,394

Long-Term Debt - Schedule of Pr

Long-Term Debt - Schedule of Principal Payments on Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total long-term debt	$ 130,849	$ 148,794
Long-term Debt Agreements [Member]
Debt Instrument [Line Items]
2019 remaining	3,821
2020	7,790
2021	7,806
2022	7,822
2023	74,589
Thereafter	34,223
Total long-term debt	$ 136,051

Accounts Payable and Other Li_3

Accounts Payable and Other Liabilities - Schedule of Accounts Payable and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Deferred ceding commission	$ 35,185	$ 44,996
Outstanding claim checks		15,360
Accounts payable and other payables	7,096	8,379
Lease obligations	8,635
Accrued interest and issuance costs	1,476	1,285
Accrued dividends	1,772	1,589
Premium tax		2,241
Other liabilities	37	460
Commission payables	12,228	11,654
Total other liabilities	$ 66,428	$ 85,964

Statutory Accounting and Regu_2

Statutory Accounting and Regulations - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
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, and NBIC [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	$ 337,300,000	$ 376,300,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended		9 Months Ended
	Jul. 31, 2019	Jan. 31, 2017	Sep. 30, 2019	Sep. 30, 2018
Mrs. Shannon Lucas [Member]
Related Party Transaction [Line Items]
Consulting fees hourly rate		$ 400
Immediate Family Member of Management or Principal Owner [Member]
Related Party Transaction [Line Items]
Consulting fees			$ 256,000	$ 575,000
Heritage P&C [Member] | Director [Member]
Related Party Transaction [Line Items]
Director annual compensation		$ 150,000
Comegys Insurance Agency, Inc. [Member]
Related Party Transaction [Line Items]
Agency commission			$ 557,700	$ 375,550
Comegys Insurance Agency, Inc. [Member] | Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Director annual compensation	$ 150,000

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Contribution Plan Disclosure [Line Items]
Contribution for participating employees	$ 213,000	$ 215,000	$ 756,000	$ 973,000
Defined Contribution Plan, Plan Name			401(k)
Medical premium cost	611,000	$ 1,000,000	$ 2,400,000	$ 2,300,000
Additional liability for unpaid claims	$ 391,000		391,000
Stop loss coverage per employee			150,000
Defined contribution plan, aggregate limit for losses			$ 1,500,000
Defined contribution plan, aggregate stop loss commences threshold percentage			125.00%
Maximum [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of contribution on employee salary			4.00%
Defined contribution plan, aggregate limit for losses in provided amount			$ 1,000,000
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 ($)	Aug. 01, 2019	May 06, 2019	Feb. 25, 2019	Aug. 01, 2018	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Common stock, shares authorized					50,000,000				50,000,000	50,000,000	50,000,000
Preferred stock, shares authorized					5,000,000				5,000,000	5,000,000
Common stock, shares outstanding					28,963,841				28,963,841	28,963,841	29,477,756
Treasury stock, shares					8,036,560				8,036,560	8,036,560	7,214,797
Additional paid-in capital					$ 331,558,000				$ 331,558,000	$ 331,558,000	$ 325,292,000
Common stock voting rights									one vote
Stock repurchase program, authorized amount				$ 50,000,000	$ 38,100,000				$ 38,100,000	$ 38,100,000
Stock repurchase program, expiration date				Dec. 31, 2020					Dec. 31, 2020
Treasury shares repurchased, shares					316,383					821,763
Treasury shares repurchased, value					$ 4,549,000	$ 2,333,000	$ 5,011,000	$ 2,000,000		$ 11,900,000
Stock repurchased in connection with vesting of restricted stock unit					4,620				12,620
Stock repurchased in connection with vesting of restricted stock unit, value					$ 68,000				$ 118,000
Cash dividend per common share	$ 0.06	$ 0.06	$ 0.06
Cash dividend, payable date	Oct. 3, 2019	Jul. 3, 2019	Apr. 3, 2019
Dividend payable, record date	Sep. 16, 2019	Jun. 14, 2019	Mar. 15, 2019
Restricted Stock [Member]
Class Of Stock [Line Items]
Unvested restricted common stock issued					570,534				570,534	570,534	605,801

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	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
Exercisable period of vested awards	30 days
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, vesting period	1 year
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, vesting period	5 years
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards granted	0
Stock-based compensation expense	$ 4,000,000	$ 3,900,000
Unrecognized stock compensation expense	$ 6,900,000
Unrecognized stock compensation expense, weighted average period	1 year 3 months 18 days
Restricted stock vested and released	35,267	0
Shares withheld to cover withholding taxes	12,620
Shares withheld to cover withholding taxes, value	$ 186,000
Restricted Stock [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, vesting period	3 years
Restricted Stock [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, vesting period	5 years
Restricted Stock [Member] | Employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards granted			155,801
Restricted Stock [Member] | Employee [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, vesting period			3 years
Restricted Stock [Member] | Employee [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, vesting period			5 years
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	1,326,018

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Restricted Stock Activity (Detail) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance, Number of shares	605,801
Granted, Number of shares	0
Vested, Number of shares	(22,647)
Canceled and surrendered, Number of shares	(12,620)
Ending balance, Number of shares	570,534
Beginning balance, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 19.30
Vested, Weighted-Average Grant-Date Fair Value per Share | $ / shares	14.28
Canceled and surrendered, Weighted-Average Grant-Date Fair Value per Share | $ / shares	14.24
Ending balance, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 19.61

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - $ / shares	Oct. 31, 2019	Aug. 01, 2019	May 06, 2019	Feb. 25, 2019
Subsequent Event [Line Items]
Cash dividend per common share		$ 0.06	$ 0.06	$ 0.06
Cash dividend, payable date		Oct. 3, 2019	Jul. 3, 2019	Apr. 3, 2019
Dividend payable, record date		Sep. 16, 2019	Jun. 14, 2019	Mar. 15, 2019
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividend, declared date	Oct. 31, 2019
Cash dividend per common share	$ 0.06
Cash dividend, payable date	Jan. 3, 2020
Dividend payable, record date	Dec. 16, 2019