AMERISAFE (AMSF) 10-Q 28 Oct 22 2022 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Oct. 21, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Trading Symbol	AMSF
Entity Registrant Name	AMERISAFE, INC.
Entity Central Index Key	0001018979
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	001-12251
Entity Tax Identification Number	75-2069407
Entity Address, Address Line One	2301 Highway 190 West
Entity Address, City or Town	DeRidder
Entity Address, State or Province	LA
Entity Address, Postal Zip Code	70634
City Area Code	337
Local Phone Number	463-9052
Entity Common Stock, Shares Outstanding		19,155,873
Entity Incorporation, State or Country Code	TX
Title of 12(b) Security	Common
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Investments:
Fixed maturity securities-held-to-maturity, at amortized cost net of allowance for credit losses of $255 and $195 in 2022 and 2021, respectively, (fair value $479,911 and $575,850 in 2022 and 2021, respectively)	$ 514,610	$ 549,231
Available-for-sale fixed maturity, Fair Value	325,891	341,769
Equity securities, Fair Value	57,375	64,140
Short-term investments	36,927	57,431
Total investments	934,803	1,012,571
Cash and cash equivalents	90,952	70,722
Amounts recoverable from reinsurers (net of allowance for credit losses of $404 and $440 in 2022 and 2021, respectively)	117,968	120,561
Premiums receivable (net of allowance for credit losses of $4,677 and $4,386 in 2022 and 2021, respectively)	137,012	135,100
Deferred income taxes	26,227	14,384
Accrued interest receivable	8,772	8,080
Property and equipment, net	7,380	6,459
Deferred policy acquisition costs	18,275	17,059
Federal income tax recoverable	2,154	6,414
Other assets	15,953	11,374
Total assets	1,359,496	1,402,724
Liabilities:
Reserves for loss and loss adjustment expenses	716,196	745,278
Unearned premiums	128,093	121,092
Amounts held for others	47,670	42,915
Policyholder deposits	36,864	39,383
Insurance-related assessments	18,751	16,850
Accounts payable and other liabilities	38,778	37,883
Payable for investments purchased	125
Total liabilities	986,477	1,003,401
Shareholders’ equity:
Common stock: voting-$0.01 par value authorized shares-50,000,000 in 2022 and 2021; 20,678,572 and 20,622,304 shares issued; and 19,159,171 and 19,364,054 shares outstanding in 2022 and 2021, respectively	207	206
Additional paid-in capital	219,988	217,458
Treasury stock, at cost (1,519,401 and 1,258,250 shares in 2022 and 2021, respectively)	(34,606)	(22,370)
Accumulated earnings	207,394	190,492
Accumulated other comprehensive income (loss), net	(19,964)	13,537
Total shareholders’ equity	373,019	399,323
Total liabilities and shareholders’ equity	$ 1,359,496	$ 1,402,724

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Fixed maturity securities, held-to-maturity, allowance for credit losses	$ 255	$ 195
Fixed maturity securities-held-to-maturity	479,911	575,850
Fixed maturity securities, available-for-sale, allowance for credit losses	0	0
Fixed maturity securities, amortized cost	351,118	324,597
Equity securities, cost	50,394	44,175
Amounts recoverable from reinsurers, allowance for credit losses	404	440
Premiums receivable, allowance for credit losses	$ 4,677	$ 4,386
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	20,678,572	20,622,304
Common stock, shares outstanding	19,159,171	19,364,054
Treasury stock, shares	1,519,401	1,258,250

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Gross premiums written	$ 68,212	$ 67,185	$ 220,463	$ 222,423
Ceded premiums written	(2,553)	(2,407)	(7,837)	(7,410)
Net premiums written	65,659	64,778	212,626	215,013
Net premiums earned	67,790	67,626	205,625	208,260
Net investment income	6,983	6,049	19,581	19,362
Net realized gains (losses) on investments	585	(8)	2,402	1,490
Net unrealized gains (losses) on equity securities	(4,082)	(771)	(12,984)	8,026
Fee and other income	104	149	352	415
Total revenues	71,380	73,045	214,976	237,553
Expenses
Loss and loss adjustment expenses incurred	37,725	29,661	115,792	101,601
Underwriting and certain other operating costs	7,426	6,503	19,100	19,769
Commissions	5,422	5,173	16,083	15,956
Salaries and benefits	6,737	6,239	19,428	19,612
Policyholder dividends	640	733	2,517	3,200
Provision for investment related credit loss expense (benefit)	(21)	15	60	(102)
Total expenses	57,929	48,324	172,980	160,036
Income before income taxes	13,451	24,721	41,996	77,517
Income tax expense	2,090	5,585	7,172	15,302
Net income	$ 11,361	$ 19,136	$ 34,824	$ 62,215
Earnings per share
Basic	$ 0.59	$ 0.99	$ 1.81	$ 3.22
Diluted	$ 0.59	$ 0.99	$ 1.80	$ 3.21
Shares used in computing earnings per share
Basic	19,198,320	19,344,636	19,267,602	19,328,041
Diluted	19,269,346	19,407,918	19,340,898	19,392,939
Cash dividends declared per common share	$ 0.31	$ 0.29	$ 0.93	$ 0.87

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 11,361	$ 19,136	$ 34,824	$ 62,215
Other comprehensive income:
Unrealized loss on debt securities, net of tax	(11,090)	(1,876)	(33,501)	(6,033)
Comprehensive income	$ 271	$ 17,260	$ 1,323	$ 56,182

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2020	$ 438,816	$ 206	$ 215,316	$ (22,370)	$ 224,645	$ 21,019
Beginning Balance, Shares at Dec. 31, 2020		20,589,309		(1,258,250)
Comprehensive income:
Net income	62,215				62,215
Other comprehensive income:
Change in unrealized gains (losses) on debt securities, net of tax	(6,033)					(6,033)
Comprehensive income	56,182
Common stock issued	$ 1,563		1,563
Common stock issued, Shares		32,995
Purchase of treasury stock, Shares	0
Share-based compensation	$ 432		432
Dividends to shareholders	(16,837)				(16,837)
Ending Balance at Sep. 30, 2021	480,156	$ 206	217,311	$ (22,370)	270,023	14,986
Ending Balance, Shares at Sep. 30, 2021		20,622,304		(1,258,250)
Beginning Balance at Jun. 30, 2021	468,366	$ 206	217,165	$ (22,370)	256,503	16,862
Beginning Balance, Shares at Jun. 30, 2021		20,622,304		(1,258,250)
Comprehensive income:
Net income	19,136				19,136
Other comprehensive income:
Change in unrealized gains (losses) on debt securities, net of tax	(1,876)					(1,876)
Comprehensive income	$ 17,260
Purchase of treasury stock, Shares	0
Share-based compensation	$ 146		146
Dividends to shareholders	(5,616)				(5,616)
Ending Balance at Sep. 30, 2021	480,156	$ 206	217,311	$ (22,370)	270,023	14,986
Ending Balance, Shares at Sep. 30, 2021		20,622,304		(1,258,250)
Beginning Balance at Dec. 31, 2021	$ 399,323	$ 206	217,458	$ (22,370)	190,492	13,537
Beginning Balance, Shares at Dec. 31, 2021	19,364,054	20,622,304		(1,258,250)
Comprehensive income:
Net income	$ 34,824				34,824
Other comprehensive income:
Change in unrealized gains (losses) on debt securities, net of tax	(33,501)					(33,501)
Comprehensive income	1,323
Common stock issued	1,970	$ 1	1,969
Common stock issued, Shares		56,268
Purchase of treasury stock	$ (12,236)			$ (12,236)
Purchase of treasury stock, Shares	(261,151)			(261,151)
Share-based compensation	$ 561		561
Dividends to shareholders	(17,922)				(17,922)
Ending Balance at Sep. 30, 2022	$ 373,019	$ 207	219,988	$ (34,606)	207,394	(19,964)
Ending Balance, Shares at Sep. 30, 2022	19,159,171	20,678,572		(1,519,401)
Beginning Balance at Jun. 30, 2022	$ 384,989	$ 207	219,744	$ (28,071)	201,983	(8,874)
Beginning Balance, Shares at Jun. 30, 2022		20,676,474		(1,379,842)
Comprehensive income:
Net income	11,361				11,361
Other comprehensive income:
Change in unrealized gains (losses) on debt securities, net of tax	(11,090)					(11,090)
Comprehensive income	271
Common stock issued, Shares		2,098
Purchase of treasury stock	$ (6,535)			$ (6,535)
Purchase of treasury stock, Shares	(139,559)			(139,559)
Share-based compensation	$ 244		244
Dividends to shareholders	(5,950)				(5,950)
Ending Balance at Sep. 30, 2022	$ 373,019	$ 207	$ 219,988	$ (34,606)	$ 207,394	$ (19,964)
Ending Balance, Shares at Sep. 30, 2022	19,159,171	20,678,572		(1,519,401)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net income	$ 34,824	$ 62,215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	953	754
Net amortization of investments	5,380	7,111
Change in investment related allowance for credit losses	60	(102)
Deferred income taxes	(2,937)	530
Net realized gains on investments	(2,402)	(1,490)
Net unrealized (gains) losses on equity securities	12,984	(8,026)
Net realized gains on disposal of assets	(2)	(21)
Share-based compensation	1,512	1,735
Changes in operating assets and liabilities:
Premiums receivable, net	(1,912)	2,243
Accrued interest receivable	(692)	126
Deferred policy acquisition costs	(1,216)	(770)
Amounts held by others		70
Other assets	(1,470)	(554)
Reserves for loss and loss adjustment expenses	(29,082)	(39,772)
Unearned premiums	7,001	6,753
Reinsurance balances	2,809	(2,591)
Amounts held for others and policyholder deposits	2,236	(3,423)
Federal income taxes payable	4,260	2,268
Accounts payable and other liabilities	3,760	2,368
Net cash provided by operating activities	36,066	29,424
Investing activities
Purchases of investments held-to-maturity	(32,152)	(23,231)
Purchases of investments available-for-sale	(91,276)	(31,915)
Purchases of equity securities	(10,763)	(4,886)
Purchases of short-term investments	(59,155)	(115,812)
Proceeds from maturities of investments held-to-maturity	59,884	63,324
Proceeds from sales and maturities of investments available-for-sale	63,706	97,069
Proceeds from sales of equity securities	7,005
Proceeds from sales and maturities of short-term investments	79,014	65,064
Purchases of property and equipment	(1,872)	(732)
Proceeds from sales of property and equipment		23
Net cash provided by investing activities	14,391	48,904
Financing activities
Finance lease purchases	(35)	(32)
Purchase of treasury stock	(12,236)
Dividends to shareholders	(17,956)	(16,925)
Net cash used in financing activities	(30,227)	(16,957)
Change in cash and cash equivalents	20,230	61,371
Cash and cash equivalents at beginning of period	70,722	61,757
Cash and cash equivalents at end of period	$ 90,952	$ 123,128

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Note 1. Basis of Presentation AMERISAFE, Inc. (the Company) is an insurance holding company incorporated in the state of Texas. The accompanying unaudited consolidated financial statements include the accounts of AMERISAFE and its subsidiaries: American Interstate Insurance Company (AIIC) and its insurance subsidiaries, Silver Oak Casualty, Inc. (SOCI) and American Interstate Insurance Company of Texas (AIICTX), Amerisafe Risk Services, Inc. (RISK) and Amerisafe General Agency, Inc. (AGAI). AIIC and SOCI are property and casualty insurance companies organized under the laws of the state of Nebraska. AIICTX is a property and casualty insurance company organized under the laws of the state of Texas. RISK, a wholly owned subsidiary of the Company, is a claims and safety service company currently servicing only affiliated insurance companies. AGAI, a wholly owned subsidiary of the Company, is a general agent for the Company. AGAI sells insurance, which is underwritten by AIIC, SOCI and AIICTX, as well as by nonaffiliated insurance carriers. The assets and operations of AGAI are not significant to that of the Company and its consolidated subsidiaries. The terms “AMERISAFE,” the “Company,” “we,” “us” or “our” refer to AMERISAFE, Inc. and its consolidated subsidiaries, as the context requires. The Company provides workers’ compensation insurance for small to mid-sized employers engaged in hazardous industries, principally construction, trucking, logging and lumber, agriculture, manufacturing, telecommunications, and maritime. Assets and revenues of AIIC and its subsidiaries represent at least 95 % of comparable consolidated amounts of the Company for each of the nine months ended September 30, 2022 and 2021. In the opinion of management of the Company, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the financial position, the results of operations and cash flows for the periods presented. The unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934 and therefore do not include all information and footnotes to be in conformity with accounting principles generally accepted in the United States (GAAP). The results for the interim periods are not necessarily indicative of the results of operations that may be expected for the year. The unaudited consolidated financial statements contained herein should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2021. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of our assets, liabilities, revenues and expenses and related disclosures. Some of the estimates result from judgments that can be subjective and complex and, consequently, actual results in future periods might differ from these estimates. Reclassifications Certain prior year amounts have been reclassified to conform with the current year presentation. Adopted Accounting Guidance The Company has not adopted any new accounting guidance in 2022 . Prospective Accounting Guidance All issued but not yet effective accounting and reporting standards as of September 30, 2022 are either not applicable to the Company or are not expected to have a material impact on the Company.

Restricted Stock, Restricted St

Restricted Stock, Restricted Stock Units, and Stock Options	9 Months Ended
	Sep. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Restricted Stock, Restricted Stock Units, and Stock Options	Note 2. Restricted Stock, Restricted Stock Units, and Stock Options As of September 30, 2022 , the Company has three equity incentive plans: the AMERISAFE Non-Employee Director Restricted Stock Plan (the Restricted Stock Plan), the AMERISAFE 2012 Equity and Incentive Compensation Plan (the 2012 Incentive Plan) and the 2022 Equity and Incentive Compensation Plan (the 2022 Incentive Plan). In connection with the approval of the 2022 Incentive Plan by the Company’s shareholders at the annual meeting of shareholders in June 2022, no further grants will be made under the 2012 Incentive Plan. All grants made under the 2012 Incentive Plan will continue in effect, subject to the terms and conditions of the 2012 Incentive Plan. See Note 12 to our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2021 for additional information regarding the Company’s incentive plans. During the nine months ended September 30, 2022, the Company issued 40,959 shares of common stock pursuant to vested performance awards. During the nine months ended September 30, 2022, the Company issued 15,309 shares of restricted common stock to officers and non-employee directors. The market value of these shares totaled $ 2.7 million. During the nine months ended September 30, 2021, the Company issued 24,288 shares of common stock pursuant to vested performance awards and 8,707 shares of restricted common stock to non-employee directors. The market value of these shares totaled $ 2.2 million. During the nine months ended September 30, 2022, the Company awarded 22,826 restricted stock units (RSUs) to an officer. The market value of these RSUs totaled $ 1.1 million. The Company did no t issue any RSUs in the prior year. The Company had no stock options outstanding as of September 30, 2022. The Company recognized share-based compensation expense of $ 0.7 million in the quarter ended September 30, 2022 and $ 0.4 million in the same period in 2021. The Company recognized share-based compensation expense of $ 1.5 million in the nine months ended September 30, 2022 and $ 1.7 million in the same period in 2021 .

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Share	Note 3. Earnings Per Share The Company computes earnings per share (EPS) in accordance with FASB Accounting Standards Codification (ASC) Topic 260, Earnings Per Share . The Company has no participating unvested common shares which contain nonforfeitable rights to dividends and applies the treasury stock method in computing basic and diluted earnings per share. Basic EPS is calculated by dividing net income by the weighted-average number of common shares outstanding during the period. The diluted EPS calculation includes potential common shares assumed issued under the treasury stock method, which reflects the potential dilution that would occur if any restricted stock or RSUs become vested. Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (in thousands, except share and per share amounts) Basic EPS : Net income $ 11,361 $ 19,136 $ 34,824 $ 62,215 Basic weighted average common shares 19,198,320 19,344,636 19,267,602 19,328,041 Basic earnings per common share $ 0.59 $ 0.99 $ 1.81 $ 3.22 Diluted EPS : Net income $ 11,361 $ 19,136 $ 34,824 $ 62,215 Diluted weighted average common shares: Weighted average common shares 19,198,320 19,344,636 19,267,602 19,328,041 Restricted stock and RSUs 71,026 63,282 73,296 64,898 Diluted weighted average common shares 19,269,346 19,407,918 19,340,898 19,392,939 Diluted earnings per common share $ 0.59 $ 0.99 $ 1.80 $ 3.21

Investments

Investments	9 Months Ended
	Sep. 30, 2022
Investments Debt And Equity Securities [Abstract]
Investments	Note 4. Investments The amortized cost, allowance for credit losses, carrying amount, gross unrecognized gains and losses, and the fair value of those investments classified as held-to-maturity at September 30, 2022 are summarized as follows: Amortized Allowance for Credit Losses Carrying Gross Gross Fair (in thousands) States and political subdivisions $ 434,938 $ ( 44 ) $ 434,894 $ 265 $ ( 30,096 ) $ 405,063 Corporate bonds 62,390 ( 208 ) 62,182 2 ( 4,242 ) 57,942 U.S. agency-based mortgage-backed securities 3,812 — 3,812 32 ( 185 ) 3,659 U.S. Treasury securities and obligations 13,647 — 13,647 27 ( 504 ) 13,170 Asset-backed securities 78 ( 3 ) 75 3 ( 1 ) 77 Totals $ 514,865 $ ( 255 ) $ 514,610 $ 329 $ ( 35,028 ) $ 479,911 The amortized cost, gross unrealized gains and losses, fair value, and the allowance for credit losses of those investments classified as available-for-sale at September 30, 2022 are summarized as follows: Amortized Gross Gross Fair Allowance for (in thousands) States and political subdivisions $ 180,244 $ 118 $ ( 14,201 ) $ 166,161 $ — Corporate bonds 149,008 — ( 8,960 ) 140,048 — U.S. agency-based mortgage-backed securities 6,208 — ( 629 ) 5,579 — U.S. Treasury securities and obligations 15,658 6 ( 1,561 ) 14,103 — Totals $ 351,118 $ 124 $ ( 25,351 ) $ 325,891 $ — The cost, gross unrealized gains and losses, and the fair value of equity securities at September 30, 2022 are summarized as follows: Cost Gross Gross Fair (in thousands) Equity securities: Domestic common stock $ 50,394 $ 6,981 $ — $ 57,375 Total equity securities $ 50,394 $ 6,981 $ — $ 57,375 The amortized cost, allowance for credit losses, carrying amount, gross unrecognized gains and losses, and the fair value of those investments classified as held-to-maturity at December 31, 2021 are summarized as follows: Amortized Allowance for Credit Losses Carrying Gross Gross Fair (in thousands) States and political subdivisions $ 471,688 $ ( 48 ) $ 471,640 $ 25,175 $ ( 263 ) $ 496,552 Corporate bonds 56,756 ( 143 ) 56,613 1,344 ( 114 ) 57,843 U.S. agency-based mortgage-backed securities 4,623 — 4,623 377 — 5,000 U.S. Treasury securities and obligations 16,251 — 16,251 132 ( 36 ) 16,347 Asset-backed securities 108 ( 4 ) 104 4 — 108 Totals $ 549,426 $ ( 195 ) $ 549,231 $ 27,032 $ ( 413 ) $ 575,850 The amortized cost, gross unrealized gains and losses, fair value, and the allowance for credit losses of those investments classified as available-for-sale at December 31, 2021 are summarized as follows: Amortized Gross Gross Fair Allowance for (in thousands) States and political subdivisions $ 202,008 $ 14,538 $ ( 240 ) $ 216,306 $ — Corporate bonds 93,947 2,751 ( 272 ) 96,426 — U.S. agency-based mortgage-backed securities 7,944 158 ( 13 ) 8,089 — U.S. Treasury securities and obligations 20,698 382 ( 132 ) 20,948 — Totals $ 324,597 $ 17,829 $ ( 657 ) $ 341,769 $ — The cost, gross unrealized gains and losses, and the fair value of equity securities at December 31, 2021 are summarized as follows: Cost Gross Gross Fair (in thousands) Equity securities: Domestic common stock $ 44,175 $ 19,965 $ — $ 64,140 Total equity securities $ 44,175 $ 19,965 $ — $ 64,140 A summary of the carrying amounts and fair value of investments in fixed maturity securities classified as held-to-maturity, by contractual maturity, is as follows: September 30, 2022 December 31, 2021 Carrying Fair Carrying Fair (in thousands) Maturity: Within one year $ 49,585 $ 49,329 $ 70,859 $ 71,455 After one year through five years 170,447 163,167 174,157 180,376 After five years through ten years 113,055 101,641 100,543 104,851 After ten years 177,636 162,038 198,945 214,060 U.S. agency-based mortgage-backed securities 3,812 3,659 4,623 5,000 Asset-backed securities 75 77 104 108 Totals $ 514,610 $ 479,911 $ 549,231 $ 575,850 A summary of the amortized cost and fair value of investments in fixed maturity securities classified as available-for-sale, by contractual maturity, is as follows: September 30, 2022 December 31, 2021 Amortized Fair Amortized Fair (in thousands) Maturity: Within one year $ 38,171 $ 37,570 $ 30,925 $ 31,258 After one year through five years 71,031 67,053 97,830 100,716 After five years through ten years 100,619 91,651 58,050 60,137 After ten years 135,089 124,038 129,848 141,569 U.S. agency-based mortgage-backed securities 6,208 5,579 7,944 8,089 Totals $ 351,118 $ 325,891 $ 324,597 $ 341,769 The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of September 30, 2022: Less Than 12 Months 12 Months or Greater Total Fair Value of Gross Fair Value of Gross Fair Value of Gross (in thousands) September 30, 2022 Available-for-Sale States and political subdivisions $ 150,390 $ 11,587 $ 13,456 $ 2,614 $ 163,846 $ 14,201 Corporate bonds 124,596 7,146 15,452 1,814 140,048 8,960 U.S. agency-based mortgage-backed securities 5,120 558 458 71 5,578 629 U.S. Treasury securities and obligations 7,978 850 5,208 711 13,186 1,561 Total available-for-sale securities $ 288,084 $ 20,141 $ 34,574 $ 5,210 $ 322,658 $ 25,351 At September 30, 2022, we held 222 individual fixed maturity securities classified as available-for-sale that were in an unrealized loss position. The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of December 31, 2021: Less Than 12 Months 12 Months or Greater Total Fair Value of Gross Fair Value of Gross Fair Value of Gross (in thousands) December 31, 2021 Available-for-Sale States and political subdivisions $ 23,465 $ 240 $ — $ — $ 23,465 $ 240 Corporate bonds 36,443 272 — — 36,443 272 U.S. agency-based mortgage-backed securities 1,146 13 — — 1,146 13 U.S. Treasury securities and obligations 6,771 132 — — 6,771 132 Total available-for-sale securities $ 67,825 $ 657 $ — $ — $ 67,825 $ 657 The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the quarter ended September 30, 2022. States and Corporate U.S. Agency U.S. Asset-Backed Totals (in thousands) Balance at June 30, 2022 $ 44 $ 228 $ — $ — $ 4 $ 276 Provision for credit loss benefit — ( 20 ) — — ( 1 ) ( 21 ) Balance at September 30, 2022 $ 44 $ 208 $ — $ — $ 3 $ 255 The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the nine months ended September 30, 2022. States and Corporate U.S. Agency U.S. Asset-Backed Totals (in thousands) Balance at December 31, 2021 $ 48 $ 143 $ — $ — $ 4 $ 195 Provision for credit loss expense (benefit) ( 4 ) 65 — — ( 1 ) 60 Balance at September 30, 2022 $ 44 $ 208 $ — $ — $ 3 $ 255 The Company has established an allowance for credit losses on 484 held-to-maturity securities totaling $ 0.3 million. The majority of those securities were issued by states and political subdivisions ( 458 securities) and corporate bonds ( 23 securities). The Company has no allowance for credit losses on investments classified as available-for-sale for the period ended September 30, 2022. The credit rating used for held-to-maturity fixed income securities is the rating for each security as published by Moody’s, S&P, and Fitch to determine the probability of default. If there are two ratings, the lower rating is used. If there are three ratings, the median rating is used. If there is one rating, that rating is used. For corporate fixed income securities (given a rating), the probability of default comes from Moody’s annual study of corporate bond defaults published each February. The maximum maturity using the default rate is 20 years (any maturity greater than 20 years will use the 20-year rate). For municipal fixed income securities (given a rating), the probability of default comes from Moody’s annual study of municipal bond defaults published each July/August. The calculation of the credit loss allowance takes the amortized cost of the fixed income security and assumes default and recovery based on the average recovery rates from the Moody’s default studies. The amortized cost of the security, minus the amount recovered, is the estimated full amount the Company could lose in a default scenario. Then this amount is multiplied by the probability of default to determine the allowance for credit loss. The lower the security is rated, the higher likelihood of default, and therefore a higher allowance for credit loss. The longer to the maturity date of a security, the higher the default risk. The table below presents the amortized cost of held-to-maturity securities aggregated by credit quality indicator as of September 30, 2022. States and Corporate U.S. Agency U.S. Asset-Backed Totals Amortized cost (in thousands) AAA/AA/A ratings $ 431,963 $ 26,782 $ 3,812 $ 13,647 $ 56 $ 476,260 Baa/BBB ratings 2,975 35,608 — — 10 38,593 B ratings — — — — 12 12 Total $ 434,938 $ 62,390 $ 3,812 $ 13,647 $ 78 $ 514,865 Net realized gains in the quarter ended September 30, 2022 were $ 0.6 million resulting from the sale of equity securities. Net realized losses in the quarter ended September 30, 2021 were immaterial. Net realized gains in the nine months ended September 30, 2022 were $ 2.4 million resulting primarily from the sale of equity and fixed maturity securities classified as available-for-sale. Net realized gains in the nine months ended September 30, 2021 were $ 1.5 million resulting primarily from the sale of fixed maturity securities classified as available-for-sale and from called fixed maturity securities. During the third quarter of 2022, we recognized through income $ 4.1 million of net unrealized losses on equity securities. During the third quarter of 2021, we recognized through income $ 0.8 million of net unrealized losses on equity securities. During the nine months ended September 30, 2022, we recognized through income $ 13.0 million of net unrealized losses on equity securities. During the nine months ended September 30, 2021, we recognized through income $ 8.0 million of net unrealized gains on equity securities. Investment income is recognized as it is earned. The discount or premium on fixed maturity securities is amortized using the “constant yield” method. Anticipated prepayments, where applicable, are considered when determining the amortization of premiums or discounts. Realized investment gains and losses are determined using the specific identification method.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Note 5. Income Taxes In accordance with FASB ASC Topic 740, “Income Taxes,” we provide for the recognition and measurement of deferred income tax benefits based on the likelihood of their realization in future years. As of September 30, 2022 , the Company had no valuation allowance against its deferred income tax assets and liabilities. As of September 30, 2021, the Company had a valuation allowance of $ 1.4 million against its deferred income tax benefits. Income tax expense from operations is different from the amount computed by applying the U.S. federal income tax statutory rate of 21 % to income before income taxes primarily due to the impact of tax-exempt investment income and state income tax accruals. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. There were no uncertain tax positions for the periods ended September 30, 2022 and 2021. Tax years 2018 through 2022 are subject to examination by the federal and state taxing authorities.

Loss Reserves

Loss Reserves	9 Months Ended
	Sep. 30, 2022
Insurance [Abstract]
Loss Reserves	Note 6. Loss Reserves We record reserves for estimated losses under insurance policies that we write and for loss adjustment expenses related to the investigation and settlement of policy claims. Our reserves for loss and loss adjustment expenses represent the estimated cost of all reported and unreported loss and loss adjustment expenses incurred and unpaid as of a given point in time. The reserves for loss and loss adjustment expenses are estimated using individual case-basis valuations, statistical analyses and estimates based upon experience for unreported claims and their associated loss and loss adjustment expenses. Such estimates may be more or less than the amounts ultimately paid when the claims are settled. The estimates are subject to the effects of trends in loss severity and frequency. Although considerable variability is inherent in these estimates, management believes that the reserves for loss and loss adjustment expenses are adequate. The estimates are continually reviewed internally and periodically evaluated with our independent actuary. Adjustments are made as experience develops and new information becomes known. Any such adjustments are included in income from current operations. See Note 9 to our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2021 for additional information regarding the Company’s loss and loss adjustment expense development. The following table provides the Company’s liability for unpaid loss and loss adjustment expenses, net of related amounts recoverable from reinsurers, for the nine months ended September 30, 2022 and 2021: Nine Months Ended September 30, 2022 2021 (in thousands) Balance, beginning of period $ 745,278 $ 760,561 Less amounts recoverable from reinsurers 119,266 105,707 Net balance, beginning of period 626,012 654,854 Add incurred related to: Current accident year 145,993 149,947 Prior accident years ( 30,201 ) ( 48,346 ) Total incurred 115,792 101,601 Less paid related to: Current accident year 30,566 30,023 Prior accident years 111,968 112,535 Total paid 142,534 142,558 Net balance, end of period 599,270 613,897 Add amounts recoverable from reinsurers 116,926 106,892 Balance, end of period $ 716,196 $ 720,789 The foregoing reconciliation reflects favorable development of the net reserves at September 30, 2022 and September 30, 2021. The favorable development reduced loss and loss adjustment expenses incurred by $ 30.2 million and $ 48.3 million in 2022 and 2021, respectively. The revisions to the Company’s reserves reflect new information gained by claims adjusters in the normal course of adjusting claims and is reflected in the financial statements when the information becomes available. It is typical for more serious claims to take several years or longer to settle and the Company continually revises estimates as more information about claimants’ medical conditions and potential disability becomes known and the claims get closer to being settled. Multiple factors can cause loss development both unfavorable and favorable. The favorable loss development we experienced across accident years was largely due to favorable case reserve development from closed claims and claims where the worker had reached maximum medical improvement. The table below presents the change in the allowance for credit losses on amounts recoverable from reinsurers for the three and nine months ended September 30, 2022 and 2021. Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (in thousands) Balance, beginning of period $ 369 $ 449 $ 440 $ 452 Provision for credit loss expense (benefit) 35 ( 60 ) ( 36 ) ( 63 ) Balance, end of period $ 404 $ 389 $ 404 $ 389

Comprehensive Income and Accumu

Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	Note 7. Comprehensive Income and Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) includes net income plus unrealized gains (losses) on our available-for-sale investment securities, net of tax. In reporting comprehensive income (loss) on a net basis in the statements of comprehensive income (loss), we used a 21 percent tax rate in 2022 and 2021. The difference between net income as reported and comprehensive income (loss) was due primarily to changes in unrealized gains and losses, net of tax on available-for-sale debt securities. The following table illustrates the changes in the balance of each component of accumulated other comprehensive income (loss) for each period presented in the interim financial statements. Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (in thousands) Balance, beginning of period $ ( 8,874 ) $ 16,862 $ 13,537 $ 21,019 Other comprehensive loss before ( 10,252 ) ( 1,614 ) ( 31,956 ) ( 4,210 ) Amounts reclassified from accumulated other ( 838 ) ( 262 ) ( 1,545 ) ( 1,823 ) Net current period other comprehensive ( 11,090 ) ( 1,876 ) ( 33,501 ) ( 6,033 ) Balance, end of period $ ( 19,964 ) $ 14,986 $ ( 19,964 ) $ 14,986 The sale or credit loss allowance adjustment of an available-for-sale security results in amounts being reclassified from accumulated other comprehensive income (loss) to current period net income. The effects of reclassifications out of accumulated other comprehensive income (loss) by the respective line items of net income are presented in the following table. Component of Accumulated Other Three Months Ended Nine Months Ended Affected line item in the Comprehensive Income (Loss) September 30, September 30, statement of income 2022 2021 2022 2021 (in thousands) Unrealized gains on debt $ 1,061 $ 331 $ 1,955 $ 2,307 Net realized gains (losses) 1,061 331 1,955 2,307 Income before income taxes Unrealized gains on debt ( 223 ) ( 69 ) ( 410 ) ( 484 ) Income tax expense $ 838 $ 262 $ 1,545 $ 1,823 Net income

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 8. Fair Value Measurements The Company carries available-for-sale securities at fair value in our consolidated financial statements and determines fair value measurements and disclosure in accordance with FASB ASC Topic 820, Fair Value Measurements and Disclosures. The Company determines the fair values of its financial instruments based on the fair value hierarchy established in ASC Topic 820, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard defines fair value, describes three levels of inputs that may be used to measure fair value, and expands disclosures about fair value measurements. Fair value is defined in ASC Topic 820 as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is the price to sell an asset or transfer a liability and, therefore, represents an exit price, not an entry price. Fair value is the exit price in the principal market (or, if lacking a principal market, the most advantageous market) in which the reporting entity would transact. Fair value is a market-based measurement, not an entity-specific measurement, and, as such, is determined based on the assumptions that market participants would use in pricing the asset or liability. The exit price objective of a fair value measurement applies regardless of the reporting entity’s intent and/or ability to sell the asset or transfer the liability at the measurement date. ASC Topic 820 requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present value amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset, also known as current replacement cost. Valuation techniques used to measure fair value are to be consistently applied. In ASC Topic 820, inputs refer broadly to the assumptions that market participants would use in pricing the asset or liability, including assumptions about risk, for example, the risk inherent in a particular valuation technique used to measure fair value (such as a pricing model) and/or the risk inherent in the inputs to the valuation technique. Inputs may be observable or unobservable: • Observable inputs are inputs that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the reporting entity. • Unobservable inputs are inputs that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. Valuation techniques used to measure fair value are intended to maximize the use of observable inputs and minimize the use of unobservable inputs. ASC Topic 820 establishes a fair value hierarchy that prioritizes the use of inputs used in valuation techniques into the following three levels: • Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. • Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, or inputs that are derived principally from or corroborated by observable market data. • Level 3 inputs are unobservable inputs for the asset or liability. Unobservable inputs are to be used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date. In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. The fair values of the Company’s investments are based upon prices provided by an independent pricing service. The Company has reviewed these prices for reasonableness and has not adjusted any prices received from the independent provider. Securities reported at fair value utilizing Level 1 inputs represent assets whose fair value is determined based upon observable unadjusted quoted market prices for identical assets in active markets. Level 2 securities represent assets whose fair value is determined using observable market information such as previous day trade prices, quotes from less active markets or quoted prices of securities with similar characteristics. There were no transfers between Level 1 and Level 2 during the nine months ended September 30, 2022. At September 30, 2022, assets measured at fair value on a recurring basis are summarized below: September 30, 2022 Level 1 Level 2 Level 3 Total Fair (in thousands) Financial instruments carried at fair value, classified as a part of: Securities available-for-sale—fixed maturity: States and political subdivisions $ — $ 166,161 $ — $ 166,161 Corporate bonds — 140,048 — 140,048 U.S. agency-based mortgage-backed securities — 5,579 — 5,579 U.S. Treasury securities 14,103 — — 14,103 Total securities available-for-sale—fixed maturity 14,103 311,788 — 325,891 Equity securities: Domestic common stock 57,375 — — 57,375 Total $ 71,478 $ 311,788 $ — $ 383,266 At September 30, 2022, assets measured at amortized cost net of allowance for credit losses are summarized below: September 30, 2022 Level 1 Level 2 Level 3 Total Fair (in thousands) Securities held-to-maturity—fixed maturity: States and political subdivisions $ — $ 405,063 $ — $ 405,063 Corporate bonds — 57,942 — 57,942 U.S. agency-based mortgage-backed securities — 3,659 — 3,659 U.S. Treasury securities 13,170 — — 13,170 Asset-backed securities — 77 — 77 Total held-to-maturity $ 13,170 $ 466,741 $ — $ 479,911 At December 31, 2021, assets measured at fair value on a recurring basis are summarized below: December 31, 2021 Level 1 Level 2 Level 3 Total Fair (in thousands) Financial instruments carried at fair value, classified as a part of: Securities available-for-sale—fixed maturity: States and political subdivisions $ — $ 216,306 $ — $ 216,306 Corporate bonds — 96,426 — 96,426 U.S. agency-based mortgage-backed securities — 8,089 — 8,089 U.S. Treasury securities 20,948 — — 20,948 Total securities available-for-sale—fixed maturity $ 20,948 $ 320,821 $ — $ 341,769 Equity securities: Domestic common stock 64,140 — — 64,140 Total $ 85,088 $ 320,821 $ — $ 405,909 At December 31, 2021, assets measured at amortized cost net of allowance for credit losses are summarized below: December 31, 2021 Level 1 Level 2 Level 3 Total Fair (in thousands) Securities held-to-maturity—fixed maturity: States and political subdivisions $ — $ 496,552 $ — $ 496,552 Corporate bonds — 57,843 — 57,843 U.S. agency-based mortgage-backed securities — 5,000 — 5,000 U.S. Treasury securities 16,347 — — 16,347 Asset-backed securities — 108 — 108 Total held-to-maturity $ 16,347 $ 559,503 $ — $ 575,850 The Company determines fair value amounts for financial instruments using available third-party market information. When such information is not available, the Company determines the fair value amounts using appropriate valuation methodologies. Nonfinancial instruments such as real estate, property and equipment, deferred policy acquisition costs, deferred income taxes and loss and loss adjustment expense reserves are excluded from the fair value disclosure. Cash and Cash Equivalents —The carrying amounts reported in the accompanying consolidated balance sheets for these financial instruments approximate their fair values, which are characterized as Level 1 assets. Investments —The fair values for fixed maturity and equity securities are based on prices obtained from an independent pricing service. Equity and treasury securities are characterized as Level 1 assets, as their fair values are based on quoted prices in active markets. Fixed maturity securities, other than treasury securities, are characterized as Level 2 assets, as their fair values are determined using observable market inputs. Short Term Investments —The carrying amounts reported in the accompanying consolidated balance sheets for these financial instruments approximate their fair values. These securities are characterized as Level 2 assets in the fair value hierarchy. The following table summarizes the carrying amounts and corresponding fair values for financial instruments: As of September 30, 2022 As of December 31, 2021 Carrying Fair Carrying Fair (in thousands) Assets: Fixed maturity securities—held-to-maturity $ 514,610 $ 479,911 $ 549,231 $ 575,850 Fixed maturity securities—available-for-sale 325,891 325,891 341,769 341,769 Equity securities 57,375 57,375 64,140 64,140 Short-term investments 36,927 36,927 57,431 57,431 Cash and cash equivalents 90,952 90,952 70,722 70,722

Treasury Stock

Treasury Stock	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Treasury Stock	Note 9. Treasury Stock The Company’s Board of Directors initiated a share repurchase program in February 2010. In October 2016 , the Board reauthorized this program with a limit of $ 25.0 million with no expiration date. As of September 30, 2022, $ 12.8 million was available for future purchases. Repurchases of shares may be made pursuant to pre-established trading plans meeting the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934. During the three months ended September 30, 2022, 139,559 shares were purchased for $ 6.5 million, or an average price of $ 46.83 per share (including commissions). During the nine months ended September 30, 2022, 261,151 shares were purchased for $ 12.2 million, or an average price of $ 46.85 per share (including commissions). There were no shares purchased in the three or nine months ended September 30, 2021 .

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	Note 10. Subsequent Events On October 25, 2022 , the Company’s Board of Directors declared a special cash dividend of $ 4.00 per share payable on December 16, 2022 to shareholders of record as of December 2, 2022 . On October 25, 2022 , the Company’s Board of Directors declared a quarterly cash dividend of $ 0.31 per share payable on December 16, 2022 to shareholders of record as of December 2, 2022 . The Board considers the payment of a regular cash dividend each calendar quarter.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform with the current year presentation.
Adopted Accounting Guidance	Adopted Accounting Guidance The Company has not adopted any new accounting guidance in 2022 .
Prospective Accounting Guidance	Prospective Accounting Guidance All issued but not yet effective accounting and reporting standards as of September 30, 2022 are either not applicable to the Company or are not expected to have a material impact on the Company.

Fair Value Measurements (Polici

Fair Value Measurements (Policies)	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	The Company carries available-for-sale securities at fair value in our consolidated financial statements and determines fair value measurements and disclosure in accordance with FASB ASC Topic 820, Fair Value Measurements and Disclosures. The Company determines the fair values of its financial instruments based on the fair value hierarchy established in ASC Topic 820, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard defines fair value, describes three levels of inputs that may be used to measure fair value, and expands disclosures about fair value measurements.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings Per Share	The diluted EPS calculation includes potential common shares assumed issued under the treasury stock method, which reflects the potential dilution that would occur if any restricted stock or RSUs become vested. Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (in thousands, except share and per share amounts) Basic EPS : Net income $ 11,361 $ 19,136 $ 34,824 $ 62,215 Basic weighted average common shares 19,198,320 19,344,636 19,267,602 19,328,041 Basic earnings per common share $ 0.59 $ 0.99 $ 1.81 $ 3.22 Diluted EPS : Net income $ 11,361 $ 19,136 $ 34,824 $ 62,215 Diluted weighted average common shares: Weighted average common shares 19,198,320 19,344,636 19,267,602 19,328,041 Restricted stock and RSUs 71,026 63,282 73,296 64,898 Diluted weighted average common shares 19,269,346 19,407,918 19,340,898 19,392,939 Diluted earnings per common share $ 0.59 $ 0.99 $ 1.80 $ 3.21

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2022
Gross Unrecognized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses, Carrying Amount and Fair Value of Investments Classified as Held-to-Maturity	The amortized cost, allowance for credit losses, carrying amount, gross unrecognized gains and losses, and the fair value of those investments classified as held-to-maturity at September 30, 2022 are summarized as follows: Amortized Allowance for Credit Losses Carrying Gross Gross Fair (in thousands) States and political subdivisions $ 434,938 $ ( 44 ) $ 434,894 $ 265 $ ( 30,096 ) $ 405,063 Corporate bonds 62,390 ( 208 ) 62,182 2 ( 4,242 ) 57,942 U.S. agency-based mortgage-backed securities 3,812 — 3,812 32 ( 185 ) 3,659 U.S. Treasury securities and obligations 13,647 — 13,647 27 ( 504 ) 13,170 Asset-backed securities 78 ( 3 ) 75 3 ( 1 ) 77 Totals $ 514,865 $ ( 255 ) $ 514,610 $ 329 $ ( 35,028 ) $ 479,911 The amortized cost, allowance for credit losses, carrying amount, gross unrecognized gains and losses, and the fair value of those investments classified as held-to-maturity at December 31, 2021 are summarized as follows: Amortized Allowance for Credit Losses Carrying Gross Gross Fair (in thousands) States and political subdivisions $ 471,688 $ ( 48 ) $ 471,640 $ 25,175 $ ( 263 ) $ 496,552 Corporate bonds 56,756 ( 143 ) 56,613 1,344 ( 114 ) 57,843 U.S. agency-based mortgage-backed securities 4,623 — 4,623 377 — 5,000 U.S. Treasury securities and obligations 16,251 — 16,251 132 ( 36 ) 16,347 Asset-backed securities 108 ( 4 ) 104 4 — 108 Totals $ 549,426 $ ( 195 ) $ 549,231 $ 27,032 $ ( 413 ) $ 575,850
Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses and Fair Value of Investments Classified as Available-for-sale	The amortized cost, gross unrealized gains and losses, fair value, and the allowance for credit losses of those investments classified as available-for-sale at September 30, 2022 are summarized as follows: Amortized Gross Gross Fair Allowance for (in thousands) States and political subdivisions $ 180,244 $ 118 $ ( 14,201 ) $ 166,161 $ — Corporate bonds 149,008 — ( 8,960 ) 140,048 — U.S. agency-based mortgage-backed securities 6,208 — ( 629 ) 5,579 — U.S. Treasury securities and obligations 15,658 6 ( 1,561 ) 14,103 — Totals $ 351,118 $ 124 $ ( 25,351 ) $ 325,891 $ — The amortized cost, gross unrealized gains and losses, fair value, and the allowance for credit losses of those investments classified as available-for-sale at December 31, 2021 are summarized as follows: Amortized Gross Gross Fair Allowance for (in thousands) States and political subdivisions $ 202,008 $ 14,538 $ ( 240 ) $ 216,306 $ — Corporate bonds 93,947 2,751 ( 272 ) 96,426 — U.S. agency-based mortgage-backed securities 7,944 158 ( 13 ) 8,089 — U.S. Treasury securities and obligations 20,698 382 ( 132 ) 20,948 — Totals $ 324,597 $ 17,829 $ ( 657 ) $ 341,769 $ —
Gross Unrealized Gains and Losses and Cost of Equity	The cost, gross unrealized gains and losses, and the fair value of equity securities at September 30, 2022 are summarized as follows: Cost Gross Gross Fair (in thousands) Equity securities: Domestic common stock $ 50,394 $ 6,981 $ — $ 57,375 Total equity securities $ 50,394 $ 6,981 $ — $ 57,375 The cost, gross unrealized gains and losses, and the fair value of equity securities at December 31, 2021 are summarized as follows: Cost Gross Gross Fair (in thousands) Equity securities: Domestic common stock $ 44,175 $ 19,965 $ — $ 64,140 Total equity securities $ 44,175 $ 19,965 $ — $ 64,140
Investment Securities Continuous Unrealized Loss Position	The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of September 30, 2022: Less Than 12 Months 12 Months or Greater Total Fair Value of Gross Fair Value of Gross Fair Value of Gross (in thousands) September 30, 2022 Available-for-Sale States and political subdivisions $ 150,390 $ 11,587 $ 13,456 $ 2,614 $ 163,846 $ 14,201 Corporate bonds 124,596 7,146 15,452 1,814 140,048 8,960 U.S. agency-based mortgage-backed securities 5,120 558 458 71 5,578 629 U.S. Treasury securities and obligations 7,978 850 5,208 711 13,186 1,561 Total available-for-sale securities $ 288,084 $ 20,141 $ 34,574 $ 5,210 $ 322,658 $ 25,351 The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of December 31, 2021: Less Than 12 Months 12 Months or Greater Total Fair Value of Gross Fair Value of Gross Fair Value of Gross (in thousands) December 31, 2021 Available-for-Sale States and political subdivisions $ 23,465 $ 240 $ — $ — $ 23,465 $ 240 Corporate bonds 36,443 272 — — 36,443 272 U.S. agency-based mortgage-backed securities 1,146 13 — — 1,146 13 U.S. Treasury securities and obligations 6,771 132 — — 6,771 132 Total available-for-sale securities $ 67,825 $ 657 $ — $ — $ 67,825 $ 657
Changes in Allowance for Credit Losses by Major Security Type of Investments Classified as Held-to-Maturity	The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the quarter ended September 30, 2022. States and Corporate U.S. Agency U.S. Asset-Backed Totals (in thousands) Balance at June 30, 2022 $ 44 $ 228 $ — $ — $ 4 $ 276 Provision for credit loss benefit — ( 20 ) — — ( 1 ) ( 21 ) Balance at September 30, 2022 $ 44 $ 208 $ — $ — $ 3 $ 255 The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the nine months ended September 30, 2022. States and Corporate U.S. Agency U.S. Asset-Backed Totals (in thousands) Balance at December 31, 2021 $ 48 $ 143 $ — $ — $ 4 $ 195 Provision for credit loss expense (benefit) ( 4 ) 65 — — ( 1 ) 60 Balance at September 30, 2022 $ 44 $ 208 $ — $ — $ 3 $ 255
Schedule of Amortized Cost Held-to-Maturity Securities Aggregated By Credit Quality Indicator	The table below presents the amortized cost of held-to-maturity securities aggregated by credit quality indicator as of September 30, 2022. States and Corporate U.S. Agency U.S. Asset-Backed Totals Amortized cost (in thousands) AAA/AA/A ratings $ 431,963 $ 26,782 $ 3,812 $ 13,647 $ 56 $ 476,260 Baa/BBB ratings 2,975 35,608 — — 10 38,593 B ratings — — — — 12 12 Total $ 434,938 $ 62,390 $ 3,812 $ 13,647 $ 78 $ 514,865
Held-to-Maturity Securities [Member]
Summary of Carrying Amount, Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity	A summary of the carrying amounts and fair value of investments in fixed maturity securities classified as held-to-maturity, by contractual maturity, is as follows: September 30, 2022 December 31, 2021 Carrying Fair Carrying Fair (in thousands) Maturity: Within one year $ 49,585 $ 49,329 $ 70,859 $ 71,455 After one year through five years 170,447 163,167 174,157 180,376 After five years through ten years 113,055 101,641 100,543 104,851 After ten years 177,636 162,038 198,945 214,060 U.S. agency-based mortgage-backed securities 3,812 3,659 4,623 5,000 Asset-backed securities 75 77 104 108 Totals $ 514,610 $ 479,911 $ 549,231 $ 575,850
Available-for-Sale Securities [Member]
Summary of Carrying Amount, Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity	A summary of the amortized cost and fair value of investments in fixed maturity securities classified as available-for-sale, by contractual maturity, is as follows: September 30, 2022 December 31, 2021 Amortized Fair Amortized Fair (in thousands) Maturity: Within one year $ 38,171 $ 37,570 $ 30,925 $ 31,258 After one year through five years 71,031 67,053 97,830 100,716 After five years through ten years 100,619 91,651 58,050 60,137 After ten years 135,089 124,038 129,848 141,569 U.S. agency-based mortgage-backed securities 6,208 5,579 7,944 8,089 Totals $ 351,118 $ 325,891 $ 324,597 $ 341,769

Loss Reserves (Tables)

Loss Reserves (Tables)	9 Months Ended
	Sep. 30, 2022
Insurance [Abstract]
Liability for Unpaid Loss and Loss Adjustment Expenses, Net of Related Amounts Recoverable from Reinsurers	The following table provides the Company’s liability for unpaid loss and loss adjustment expenses, net of related amounts recoverable from reinsurers, for the nine months ended September 30, 2022 and 2021: Nine Months Ended September 30, 2022 2021 (in thousands) Balance, beginning of period $ 745,278 $ 760,561 Less amounts recoverable from reinsurers 119,266 105,707 Net balance, beginning of period 626,012 654,854 Add incurred related to: Current accident year 145,993 149,947 Prior accident years ( 30,201 ) ( 48,346 ) Total incurred 115,792 101,601 Less paid related to: Current accident year 30,566 30,023 Prior accident years 111,968 112,535 Total paid 142,534 142,558 Net balance, end of period 599,270 613,897 Add amounts recoverable from reinsurers 116,926 106,892 Balance, end of period $ 716,196 $ 720,789
Change in Allowance for Credit Losses on Amounts Recoverable from Reinsurers	The table below presents the change in the allowance for credit losses on amounts recoverable from reinsurers for the three and nine months ended September 30, 2022 and 2021. Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (in thousands) Balance, beginning of period $ 369 $ 449 $ 440 $ 452 Provision for credit loss expense (benefit) 35 ( 60 ) ( 36 ) ( 63 ) Balance, end of period $ 404 $ 389 $ 404 $ 389

Comprehensive Income and Accu_2

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (AOCI)	The following table illustrates the changes in the balance of each component of accumulated other comprehensive income (loss) for each period presented in the interim financial statements. Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (in thousands) Balance, beginning of period $ ( 8,874 ) $ 16,862 $ 13,537 $ 21,019 Other comprehensive loss before ( 10,252 ) ( 1,614 ) ( 31,956 ) ( 4,210 ) Amounts reclassified from accumulated other ( 838 ) ( 262 ) ( 1,545 ) ( 1,823 ) Net current period other comprehensive ( 11,090 ) ( 1,876 ) ( 33,501 ) ( 6,033 ) Balance, end of period $ ( 19,964 ) $ 14,986 $ ( 19,964 ) $ 14,986
Reclassification Out of Accumulated Other Comprehensive Income (Loss)	The effects of reclassifications out of accumulated other comprehensive income (loss) by the respective line items of net income are presented in the following table. Component of Accumulated Other Three Months Ended Nine Months Ended Affected line item in the Comprehensive Income (Loss) September 30, September 30, statement of income 2022 2021 2022 2021 (in thousands) Unrealized gains on debt $ 1,061 $ 331 $ 1,955 $ 2,307 Net realized gains (losses) 1,061 331 1,955 2,307 Income before income taxes Unrealized gains on debt ( 223 ) ( 69 ) ( 410 ) ( 484 ) Income tax expense $ 838 $ 262 $ 1,545 $ 1,823 Net income

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Schedule of Assets Measured at Fair Value on Recurring Basis	At September 30, 2022, assets measured at fair value on a recurring basis are summarized below: September 30, 2022 Level 1 Level 2 Level 3 Total Fair (in thousands) Financial instruments carried at fair value, classified as a part of: Securities available-for-sale—fixed maturity: States and political subdivisions $ — $ 166,161 $ — $ 166,161 Corporate bonds — 140,048 — 140,048 U.S. agency-based mortgage-backed securities — 5,579 — 5,579 U.S. Treasury securities 14,103 — — 14,103 Total securities available-for-sale—fixed maturity 14,103 311,788 — 325,891 Equity securities: Domestic common stock 57,375 — — 57,375 Total $ 71,478 $ 311,788 $ — $ 383,266 At September 30, 2022, assets measured at amortized cost net of allowance for credit losses are summarized below: September 30, 2022 Level 1 Level 2 Level 3 Total Fair (in thousands) Securities held-to-maturity—fixed maturity: States and political subdivisions $ — $ 405,063 $ — $ 405,063 Corporate bonds — 57,942 — 57,942 U.S. agency-based mortgage-backed securities — 3,659 — 3,659 U.S. Treasury securities 13,170 — — 13,170 Asset-backed securities — 77 — 77 Total held-to-maturity $ 13,170 $ 466,741 $ — $ 479,911 At December 31, 2021, assets measured at fair value on a recurring basis are summarized below: December 31, 2021 Level 1 Level 2 Level 3 Total Fair (in thousands) Financial instruments carried at fair value, classified as a part of: Securities available-for-sale—fixed maturity: States and political subdivisions $ — $ 216,306 $ — $ 216,306 Corporate bonds — 96,426 — 96,426 U.S. agency-based mortgage-backed securities — 8,089 — 8,089 U.S. Treasury securities 20,948 — — 20,948 Total securities available-for-sale—fixed maturity $ 20,948 $ 320,821 $ — $ 341,769 Equity securities: Domestic common stock 64,140 — — 64,140 Total $ 85,088 $ 320,821 $ — $ 405,909
Schedule of Assets Measured at Amortized Cost Net of Allowance For Credit Losses	September 30, 2022 Level 1 Level 2 Level 3 Total Fair (in thousands) Financial instruments carried at fair value, classified as a part of: Securities available-for-sale—fixed maturity: States and political subdivisions $ — $ 166,161 $ — $ 166,161 Corporate bonds — 140,048 — 140,048 U.S. agency-based mortgage-backed securities — 5,579 — 5,579 U.S. Treasury securities 14,103 — — 14,103 Total securities available-for-sale—fixed maturity 14,103 311,788 — 325,891 Equity securities: Domestic common stock 57,375 — — 57,375 Total $ 71,478 $ 311,788 $ — $ 383,266 At September 30, 2022, assets measured at amortized cost net of allowance for credit losses are summarized below: September 30, 2022 Level 1 Level 2 Level 3 Total Fair (in thousands) Securities held-to-maturity—fixed maturity: States and political subdivisions $ — $ 405,063 $ — $ 405,063 Corporate bonds — 57,942 — 57,942 U.S. agency-based mortgage-backed securities — 3,659 — 3,659 U.S. Treasury securities 13,170 — — 13,170 Asset-backed securities — 77 — 77 Total held-to-maturity $ 13,170 $ 466,741 $ — $ 479,911 At December 31, 2021, assets measured at amortized cost net of allowance for credit losses are summarized below: December 31, 2021 Level 1 Level 2 Level 3 Total Fair (in thousands) Securities held-to-maturity—fixed maturity: States and political subdivisions $ — $ 496,552 $ — $ 496,552 Corporate bonds — 57,843 — 57,843 U.S. agency-based mortgage-backed securities — 5,000 — 5,000 U.S. Treasury securities 16,347 — — 16,347 Asset-backed securities — 108 — 108 Total held-to-maturity $ 16,347 $ 559,503 $ — $ 575,850
Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments	The following table summarizes the carrying amounts and corresponding fair values for financial instruments: As of September 30, 2022 As of December 31, 2021 Carrying Fair Carrying Fair (in thousands) Assets: Fixed maturity securities—held-to-maturity $ 514,610 $ 479,911 $ 549,231 $ 575,850 Fixed maturity securities—available-for-sale 325,891 325,891 341,769 341,769 Equity securities 57,375 57,375 64,140 64,140 Short-term investments 36,927 36,927 57,431 57,431 Cash and cash equivalents 90,952 90,952 70,722 70,722

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Percentage of comparable consolidated amounts	95%	95%

Restricted Stock, Restricted _2

Restricted Stock, Restricted Stock Units, and Stock Options - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Incentive_Plan shares	Sep. 30, 2021 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans | Incentive_Plan			3
Market value of shares | $			$ 2.7	$ 2.2
Stock options outstanding	0		0
Share-based compensation expense | $	$ 0.7	$ 0.4	$ 1.5	$ 1.7
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued, shares			40,959	24,288
Restricted Stock [Member] | Employees and Non-employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued, shares			15,309	8,707
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market value of shares | $			$ 1.1
Restricted Stock Units (RSUs) [Member] | Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued, shares			22,826	0

Earnings Per Share - Calculatio

Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share Basic [Abstract]
Net income	$ 11,361	$ 19,136	$ 34,824	$ 62,215
Basic weighted average common shares	19,198,320	19,344,636	19,267,602	19,328,041
Basic earnings per common share	$ 0.59	$ 0.99	$ 1.81	$ 3.22
Net income	$ 11,361	$ 19,136	$ 34,824	$ 62,215
Weighted average common shares	19,198,320	19,344,636	19,267,602	19,328,041
Restricted stock and RSUs	71,026	63,282	73,296	64,898
Diluted weighted average common shares	19,269,346	19,407,918	19,340,898	19,392,939
Diluted earnings per common share	$ 0.59	$ 0.99	$ 1.80	$ 3.21

Investments - Gross Unrecognize

Investments - Gross Unrecognized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses, Carrying Amount and Fair Value of Investments Classified as Held-to-Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity, Amortized Cost, Totals	$ 514,865		$ 549,426
Held-to-Maturity, Allowance for Credit Losses	(255)	$ (276)	(195)
Held-to-Maturity, Carrying Amount	514,610		549,231
Held-to-Maturity, Gross Unrecognized Gains	329		27,032
Held-to-Maturity, Gross Unrecognized Losses	(35,028)		(413)
Held To Maturity Securities Fair Value	479,911		575,850
States and Political Subdivisions [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity, Amortized Cost, Totals	434,938		471,688
Held-to-Maturity, Allowance for Credit Losses	(44)	(44)	(48)
Held-to-Maturity, Carrying Amount	434,894		471,640
Held-to-Maturity, Gross Unrecognized Gains	265		25,175
Held-to-Maturity, Gross Unrecognized Losses	(30,096)		(263)
Held To Maturity Securities Fair Value	405,063		496,552
Corporate Bonds [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity, Amortized Cost, Totals	62,390		56,756
Held-to-Maturity, Allowance for Credit Losses	(208)	(228)	(143)
Held-to-Maturity, Carrying Amount	62,182		56,613
Held-to-Maturity, Gross Unrecognized Gains	2		1,344
Held-to-Maturity, Gross Unrecognized Losses	(4,242)		(114)
Held To Maturity Securities Fair Value	57,942		57,843
U.S. Agency-Based Mortgage-Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity, Amortized Cost, Totals	3,812		4,623
Held-to-Maturity, Carrying Amount	3,812		4,623
Held-to-Maturity, Gross Unrecognized Gains	32		377
Held-to-Maturity, Gross Unrecognized Losses	(185)
Held To Maturity Securities Fair Value	3,659		5,000
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity, Amortized Cost, Totals	13,647		16,251
Held-to-Maturity, Carrying Amount	13,647		16,251
Held-to-Maturity, Gross Unrecognized Gains	27		132
Held-to-Maturity, Gross Unrecognized Losses	(504)		(36)
Held To Maturity Securities Fair Value	13,170		16,347
Asset-Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-maturity, Amortized Cost, Totals	78		108
Held-to-Maturity, Allowance for Credit Losses	(3)	$ (4)	(4)
Held-to-Maturity, Carrying Amount	75		104
Held-to-Maturity, Gross Unrecognized Gains	3		4
Held-to-Maturity, Gross Unrecognized Losses	(1)
Held To Maturity Securities Fair Value	$ 77		$ 108

Investments - Gross Unrealized

Investments - Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses and Fair Value of Investments Classified as Available-for-Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale, Amortized Cost	$ 351,118	$ 324,597
Available-for-sale, Gross Unrealized Gains	124	17,829
Available-for-sale, Gross Unrealized Losses	(25,351)	(657)
Fixed maturity securities-available-for-sale	325,891	341,769
Debt Securities Available For Sale Allowance For Credit Loss	0	0
States and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale, Amortized Cost	180,244	202,008
Available-for-sale, Gross Unrealized Gains	118	14,538
Available-for-sale, Gross Unrealized Losses	(14,201)	(240)
Fixed maturity securities-available-for-sale	166,161	216,306
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale, Amortized Cost	149,008	93,947
Available-for-sale, Gross Unrealized Gains		2,751
Available-for-sale, Gross Unrealized Losses	(8,960)	(272)
Fixed maturity securities-available-for-sale	140,048	96,426
U.S. Agency-Based Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale, Amortized Cost	6,208	7,944
Available-for-sale, Gross Unrealized Gains		158
Available-for-sale, Gross Unrealized Losses	(629)	(13)
Fixed maturity securities-available-for-sale	5,579	8,089
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale, Amortized Cost	15,658	20,698
Available-for-sale, Gross Unrealized Gains	6	382
Available-for-sale, Gross Unrealized Losses	(1,561)	(132)
Fixed maturity securities-available-for-sale	$ 14,103	$ 20,948

Investments - Gross Unrealize_2

Investments - Gross Unrealized Gains and Losses and Cost of Equity (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities, Cost	$ 50,394	$ 44,175
Equity securities, Gross Unrealized Gains	6,981	19,965
Equity securities	57,375	64,140
Domestic Common Stock [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities, Cost	50,394	44,175
Equity securities, Gross Unrealized Gains	6,981	19,965
Equity securities	$ 57,375	$ 64,140

Investments - Summary of Carryi

Investments - Summary of Carrying Amounts and Fair Value of Investments in Fixed Maturity Securities, Classified as Held-to-Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Held To Maturity Securities [Line Items]
Within one year, Carrying Amount	$ 49,585	$ 70,859
After one year through five years, Carrying Amount	170,447	174,157
After five years through ten years, Carrying Amount	113,055	100,543
After ten years, Carrying Amount	177,636	198,945
Held-to-maturity, Carrying Amount, Totals	514,610	549,231
Within one year, Fair Value	49,329	71,455
After one year through five years, Fair Value	163,167	180,376
After five years through ten years, Fair Value	101,641	104,851
After ten years, Fair Value	162,038	214,060
Held-to-maturity, Fair Value, Totals	479,911	575,850
U.S. Agency-Based Mortgage-Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Without single maturity, Carrying Amount	3,812	4,623
Held-to-maturity, Carrying Amount, Totals	3,812	4,623
Without single maturity, Fair Value	3,659	5,000
Held-to-maturity, Fair Value, Totals	3,659	5,000
Asset-Backed Securities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Without single maturity, Carrying Amount	75	104
Held-to-maturity, Carrying Amount, Totals	75	104
Without single maturity, Fair Value	77	108
Held-to-maturity, Fair Value, Totals	$ 77	$ 108

Investments - Summary of Amorti

Investments - Summary of Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, Classified as Available-for-Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Within one year, Amortized Cost	$ 38,171	$ 30,925
After one year through five years, Amortized Cost	71,031	97,830
After five years through ten years, Amortized Cost	100,619	58,050
After ten years, Amortized Cost	135,089	129,848
Available-for-sale, Amortized Cost	351,118	324,597
Within one year, Fair Value	37,570	31,258
After one year through five years, Fair Value	67,053	100,716
After five years through ten years, Fair Value	91,651	60,137
After ten years, Fair Value	124,038	141,569
Available-for-sale, Fair Value	325,891	341,769
U.S. Agency-Based Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Without single maturity date, Amortized Cost	6,208	7,944
Without single maturity date, Fair value	$ 5,579	$ 8,089

Investments - Investment Securi

Investments - Investment Securities Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Available-for Sale, Fair value of Investments with Unrealized Losses, Less Than 12 Months	$ 288,084	$ 67,825
Available-for Sale, Gross Unrealized Losses, Less Than 12 Months	20,141	657
Available-for Sale, Fair Value of Investments with Unrealized Losses, 12 Months or Greater	34,574
Available-for Sale, Gross Unrealized Losses, 12 Months or Greater	5,210
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total	322,658	67,825
Available-for Sale, Gross Unrealized Losses, Total	25,351	657
States and Political Subdivisions [Member]
Marketable Securities [Line Items]
Available-for Sale, Fair value of Investments with Unrealized Losses, Less Than 12 Months	150,390	23,465
Available-for Sale, Gross Unrealized Losses, Less Than 12 Months	11,587	240
Available-for Sale, Fair Value of Investments with Unrealized Losses, 12 Months or Greater	13,456
Available-for Sale, Gross Unrealized Losses, 12 Months or Greater	2,614
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total	163,846	23,465
Available-for Sale, Gross Unrealized Losses, Total	14,201	240
Corporate Bonds [Member]
Marketable Securities [Line Items]
Available-for Sale, Fair value of Investments with Unrealized Losses, Less Than 12 Months	124,596	36,443
Available-for Sale, Gross Unrealized Losses, Less Than 12 Months	7,146	272
Available-for Sale, Fair Value of Investments with Unrealized Losses, 12 Months or Greater	15,452
Available-for Sale, Gross Unrealized Losses, 12 Months or Greater	1,814
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total	140,048	36,443
Available-for Sale, Gross Unrealized Losses, Total	8,960	272
U.S. Agency-Based Mortgage-Backed Securities [Member]
Marketable Securities [Line Items]
Available-for Sale, Fair value of Investments with Unrealized Losses, Less Than 12 Months	5,120	1,146
Available-for Sale, Gross Unrealized Losses, Less Than 12 Months	558	13
Available-for Sale, Fair Value of Investments with Unrealized Losses, 12 Months or Greater	458
Available-for Sale, Gross Unrealized Losses, 12 Months or Greater	71
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total	5,578	1,146
Available-for Sale, Gross Unrealized Losses, Total	629	13
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Marketable Securities [Line Items]
Available-for Sale, Fair value of Investments with Unrealized Losses, Less Than 12 Months	7,978	6,771
Available-for Sale, Gross Unrealized Losses, Less Than 12 Months	850	132
Available-for Sale, Fair Value of Investments with Unrealized Losses, 12 Months or Greater	5,208
Available-for Sale, Gross Unrealized Losses, 12 Months or Greater	711
Available-for Sale, Fair Value of Investments with Unrealized Losses, Total	13,186	6,771
Available-for Sale, Gross Unrealized Losses, Total	$ 1,561	$ 132

Investments - Additional Inform

Investments - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) Security	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Security	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Marketable Securities [Line Items]
Individual fixed maturity held in unrealized loss position | Security	222		222
Number of fixed maturity securities, allowance for credit loss | Security	484		484
Fixed maturity securities, held-to-maturity, allowance for credit losses	$ 255		$ 255		$ 276	$ 195
Available-for-sale, Allowance for Credit Losses	0		0			0
Net realized gains (losses) on investments	585	$ (8)	2,402	$ 1,490
Net unrealized gains (losses) on equity securities	(4,082)	$ (771)	(12,984)	$ 8,026
Corporate Bonds [Member]
Marketable Securities [Line Items]
Fixed maturity securities, held-to-maturity, allowance for credit losses	$ 208		$ 208		228	143
Number of majority securities | Security	23		23
States and Political Subdivisions [Member]
Marketable Securities [Line Items]
Fixed maturity securities, held-to-maturity, allowance for credit losses	$ 44		$ 44		$ 44	$ 48
Number of majority securities | Security	458		458
Corporate Fixed Income Securities [Member] | Maximum [Member]
Marketable Securities [Line Items]
Investments maturity period using default rate			20 years

Investments - Changes in Allowa

Investments - Changes in Allowance for Credit Losses by Major Security Type of Investments Classified as Held-to-Maturity (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Balance	$ 276	$ 195
Provision for credit loss expense (benefit)	(21)	60
Balance	255	255
Amortized cost	514,865	514,865
AAA/AA/A Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	476,260	476,260
Baa/BBB Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	38,593	38,593
B Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	12	12
States and Political Subdivisions [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Balance	44	48
Provision for credit loss expense (benefit)		(4)
Balance	44	44
Amortized cost	434,938	434,938
States and Political Subdivisions [Member] | AAA/AA/A Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	431,963	431,963
States and Political Subdivisions [Member] | Baa/BBB Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	2,975	2,975
Corporate Bonds [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Balance	228	143
Provision for credit loss expense (benefit)	(20)	65
Balance	208	208
Amortized cost	62,390	62,390
Corporate Bonds [Member] | AAA/AA/A Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	26,782	26,782
Corporate Bonds [Member] | Baa/BBB Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	35,608	35,608
U.S. Agency-Based Mortgage-Backed Securities [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	3,812	3,812
U.S. Agency-Based Mortgage-Backed Securities [Member] | AAA/AA/A Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	3,812	3,812
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	13,647	13,647
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | AAA/AA/A Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	13,647	13,647
Asset-Backed Securities [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Balance	4	4
Provision for credit loss expense (benefit)	(1)	(1)
Balance	3	3
Amortized cost	78	78
Asset-Backed Securities [Member] | AAA/AA/A Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	56	56
Asset-Backed Securities [Member] | Baa/BBB Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	10	10
Asset-Backed Securities [Member] | B Ratings [Member]
Debt Securities Held To Maturity Credit Quality Indicator [Line Items]
Amortized cost	$ 12	$ 12

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Valuation allowance	$ 0	$ 1,400,000
U.S federal income tax statutory rate	21%	21%
Uncertain tax positions recognized	$ 0	$ 0

Loss Reserves - Liability for U

Loss Reserves - Liability for Unpaid Loss and Loss Adjustment Expenses, Net of Related Amounts Recoverable from Reinsurers (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Roll Forward In Liability For Unpaid Claims And Claims Adjustment Expense [Abstract]
Balance, beginning of period	$ 745,278	$ 760,561
Less amounts recoverable from reinsurers on unpaid loss and loss adjustment expenses	119,266	105,707
Net balance, beginning of period	626,012	654,854
Add incurred related to:
Current accident year	145,993	149,947
Prior accident years	(30,201)	(48,346)
Total incurred	115,792	101,601
Less paid related to:
Current accident year	30,566	30,023
Prior accident years	111,968	112,535
Total paid	142,534	142,558
Net balance, end of period	599,270	613,897
Add amounts recoverable from reinsurers on unpaid loss and loss adjustment expenses	116,926	106,892
Balance, end of period	$ 716,196	$ 720,789

Loss Reserves - Additional Info

Loss Reserves - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Insurance [Abstract]
Loss and LAE Related to Prior Periods	$ 30,201	$ 48,346

Loss Reserves - Change in Allow

Loss Reserves - Change in Allowance for Credit Losses on Amounts Recoverable from Reinsurers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Insurance [Abstract]
Balance, beginning of period	$ 369	$ 449	$ 440	$ 452
Provision for credit loss benefit	35	(60)	(36)	(63)
Balance, end of period	$ 404	$ 389	$ 404	$ 389

Comprehensive Income and Accu_3

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate	21%	21%

Comprehensive Income and Accu_4

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (AOCI) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 384,989	$ 468,366	$ 399,323	$ 438,816
Other comprehensive loss before reclassification	(10,252)	(1,614)	(31,956)	(4,210)
Amounts reclassified from accumulated other comprehensive income (loss)	(838)	(262)	(1,545)	(1,823)
Net current period other comprehensive loss	(11,090)	(1,876)	(33,501)	(6,033)
Ending Balance	373,019	480,156	373,019	480,156
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(8,874)	16,862	13,537	21,019
Ending Balance	$ (19,964)	$ 14,986	$ (19,964)	$ 14,986

Comprehensive Income and Accu_5

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments	$ 585	$ (8)	$ 2,402	$ 1,490
Income before income taxes	13,451	24,721	41,996	77,517
Income tax expense	(2,090)	(5,585)	(7,172)	(15,302)
Net income	11,361	19,136	34,824	62,215
Unrealized Gains On Debt Securities, Net Of Tax [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments	1,061	331	1,955	2,307
Income before income taxes	1,061	331	1,955	2,307
Income tax expense	(223)	(69)	(410)	(484)
Net income	$ 838	$ 262	$ 1,545	$ 1,823

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	$ 325,891	$ 341,769
Equity securities, Fair Value	57,375	64,140
Fair Value, Measurements, Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	325,891	341,769
Total	383,266	405,909
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	14,103	20,948
Total	71,478	85,088
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	311,788	320,821
Total	311,788	320,821
Fair Value, Measurements, Recurring [Member] | States and Political Subdivisions [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	166,161	216,306
Fair Value, Measurements, Recurring [Member] | States and Political Subdivisions [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	166,161	216,306
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	140,048	96,426
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	140,048	96,426
Fair Value, Measurements, Recurring [Member] | U.S. Agency-Based Mortgage-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	5,579	8,089
Fair Value, Measurements, Recurring [Member] | U.S. Agency-Based Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	5,579	8,089
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	14,103	20,948
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity, Fair Value	14,103	20,948
Fair Value, Measurements, Recurring [Member] | Common Stock [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities, Fair Value	57,375	64,140
Fair Value, Measurements, Recurring [Member] | Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities, Fair Value	$ 57,375	$ 64,140

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Assets Measured at Amortized Cost Net of Allowance For Credit Losses (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	$ 479,911	$ 575,850
States and Political Subdivisions [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	405,063	496,552
Corporate Bonds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	57,942	57,843
U.S. Agency-Based Mortgage-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	3,659	5,000
U.S. Treasury Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	13,170	16,347
Asset-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	77	108
Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	13,170	16,347
Fair Value, Inputs, Level 1 [Member] | U.S. Treasury Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	13,170	16,347
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	466,741	559,503
Fair Value, Inputs, Level 2 [Member] | States and Political Subdivisions [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	405,063	496,552
Fair Value, Inputs, Level 2 [Member] | Corporate Bonds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	57,942	57,843
Fair Value, Inputs, Level 2 [Member] | U.S. Agency-Based Mortgage-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	3,659	5,000
Fair Value, Inputs, Level 2 [Member] | Asset-Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities held-to-maturity-fixed maturity, Fair Value	$ 77	$ 108

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities-held-to-maturity	$ 479,911	$ 575,850
Fixed maturity securities-available-for-sale	325,891	341,769
Equity securities	57,375	64,140
Short-term investments	36,927	57,431
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities-held-to-maturity	514,610	549,231
Fixed maturity securities-available-for-sale	325,891	341,769
Equity securities	57,375	64,140
Short-term investments	36,927	57,431
Cash and cash equivalents	90,952	70,722
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturity securities-held-to-maturity	479,911	575,850
Fixed maturity securities-available-for-sale	325,891	341,769
Equity securities	57,375	64,140
Short-term investments	36,927	57,431
Cash and cash equivalents	$ 90,952	$ 70,722

Treasury Stock - Additional Inf

Treasury Stock - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Oct. 31, 2016
Equity [Abstract]
Share repurchase program, new limit amount	$ 12,800,000		$ 12,800,000		$ 25,000,000
Purchase of treasury stock, Shares	139,559	0	261,151	0
Purchase of treasury stock	$ 6,535,000		$ 12,236,000
Shares purchased, average price	$ 46.83		$ 46.85

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Subsequent Event [Member]	Oct. 25, 2022 $ / shares
Dividend Declared [Member]
Subsequent Event [Line Items]
Date of dividend declared	Oct. 25, 2022
Cash dividend per share	$ 0.31
Date of payment for dividend	Dec. 16, 2022
Date of record for dividend payment	Dec. 02, 2022
Special Cash Dividend Declared [Member]
Subsequent Event [Line Items]
Date of dividend declared	Oct. 25, 2022
Cash dividend per share	$ 4
Date of payment for dividend	Dec. 16, 2022
Date of record for dividend payment	Dec. 02, 2022