Kinsale Capital (KNSL) 10-K 25 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 17, 2022	Jun. 30, 2021
Document and Entity Information [Abstract]
Entity Registrant Name	KINSALE CAPITAL GROUP, INC.
Trading Symbol	KNSL
Entity Listing, Description	Common Stock, par value $0.01 per share
Entity Address, Address Line One	2035 Maywill Street
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23230
City Area Code	804
Local Phone Number	289-1300
Entity Incorporation, State or Country Code	DE
Entity Central Index Key	0001669162
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-37848
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		22,840,083
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Public Float			$ 3,540,691,287
Security Exchange Name	NYSE
Entity Tax Identification Number	98-0664337
ICFR Auditor Attestation Flag	true
Auditor Name	KPMG, LLP
Auditor Location	Richmond, VA
Auditor Firm ID	185
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement relating to its 2022 annual meeting of stockholders (the "2022 Proxy Statement") are incorporated by reference into Part III of this Annual Report on Form 10-K. The 2022 Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments:
Fixed-maturity securities available-for-sale, at fair value (amortized cost: $1,371,519 – 2021; $1,031,817 – 2020)	$ 1,392,066	$ 1,081,800
Equity securities, at fair value (cost: $118,895 – 2021; $98,758 – 2020)	172,611	129,662
Total investments	1,564,677	1,211,462
Cash and cash equivalents	121,040	77,093
Investment income due and accrued	7,658	6,637
Premiums receivable, net	71,004	48,641
Reinsurance recoverables	122,970	93,215
Ceded unearned premiums	33,679	24,265
Deferred policy acquisition costs, net of ceding commissions	41,968	31,912
Intangible assets	3,538	3,538
Deferred income tax asset, net	2,109	0
Other assets	57,012	50,133
Total assets	2,025,655	1,546,896
Liabilities:
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	881,344	636,013
Unearned premiums	347,730	260,986
Payable to reinsurers	16,112	12,672
Accounts payable and accrued expenses	23,250	13,651
Credit facility	42,696	42,570
Deferred income tax liability, net	0	4,648
Other liabilities	15,188	118
Total liabilities	1,326,320	970,658
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value, 400,000,000 shares authorized, 22,834,377 shares issued and outstanding at December 31, 2021; 22,757,251 shares issued and outstanding at December 31, 2020	228	228
Additional paid-in capital	295,040	291,315
Retained earnings	385,942	243,315
Accumulated other comprehensive income	18,125	41,380
Stockholders' equity	699,335	576,238
Total liabilities and stockholders' equity	$ 2,025,655	$ 1,546,896

Consolidated Balance Sheets - (

Consolidated Balance Sheets - (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturity securities available-for-sale, amortized cost	$ 1,371,519	$ 1,031,817
Equity securities - cost	$ 118,895	$ 98,758
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	22,834,377	22,757,251
Common stock, shares outstanding (in shares)	22,834,377	22,757,251

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Gross written premiums	$ 764,373	$ 552,814	$ 389,694
Ceded written premiums	(104,164)	(74,595)	(47,633)
Net written premiums	660,209	478,219	342,061
Change in unearned premiums	(77,330)	(65,465)	(59,080)
Net earned premiums	582,879	412,754	282,981
Net investment income	31,048	26,110	20,133
Change in the fair value of equity securities	22,812	16,855	12,389
Net realized investment gains	2,828	3,533	359
Other income	212	634	26
Total revenues	639,779	459,886	315,888
Expenses:
Losses and loss adjustment expenses	324,415	263,802	169,563
Underwriting, acquisition and insurance expenses	124,900	94,296	70,217
Other expenses	1,663	1,375	57
Total expenses	450,978	359,473	239,837
Income before income taxes	188,801	100,413	76,051
Income tax expense	36,142	11,994	12,735
Net income	152,659	88,419	63,316
Other comprehensive income (loss):
Change in unrealized (losses) gains on available-for-sale investments, net of taxes	(23,255)	27,862	14,774
Total comprehensive income	$ 129,404	$ 116,281	$ 78,090
Earnings per share:
Basic	$ 6.73	$ 3.96	$ 2.94
Diluted	$ 6.62	$ 3.87	$ 2.86
Weighted-average common shares outstanding:
Basic	22,693	22,319	21,528
Diluted	23,062	22,852	22,136

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, shares at Dec. 31, 2018	21,242,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, shares	742,000
Stock-based compensation, shares	229,000
Restricted shares withheld for taxes, shares	(7,000)
Balance, shares at Dec. 31, 2019	22,206,000
Balance at Dec. 31, 2018	$ 263,986	$ 212	$ 158,485	$ 106,545	$ (1,256)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	65,879	8	65,871
Issuance of stock under stock-based compensation plan	2,750	2	2,748
Stock-based compensation expense	2,742		2,742
Restricted shares withheld for taxes	(617)		(617)
Dividends declared	(6,950)			(6,950)
Other comprehensive income (loss), net of income tax	14,774				14,774
Net income	63,316			63,316
Balance at Dec. 31, 2019	$ 405,880	222	229,229	162,911	13,518
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, shares	311,000
Stock-based compensation, shares	252,000
Restricted shares withheld for taxes, shares	(12,000)
Balance, shares at Dec. 31, 2020	22,757,251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard for credit losses | Accounting Standards Update 2016-13 [Member]	$ 78			78
Issuance of common stock, net of issuance costs	56,698	3	56,695
Issuance of stock under stock-based compensation plan	3,622	3	3,619
Stock-based compensation expense	3,575		3,575
Restricted shares withheld for taxes	(1,803)		(1,803)
Dividends declared	(8,093)			(8,093)
Other comprehensive income (loss), net of income tax	27,862				27,862
Net income	88,419			88,419
Balance at Dec. 31, 2020	$ 576,238	228	291,315	243,315	41,380
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation, shares	90,000
Restricted shares withheld for taxes, shares	(13,000)
Balance, shares at Dec. 31, 2021	22,834,377
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under stock-based compensation plan	$ 982	0	982
Stock-based compensation expense	4,844		4,844
Restricted shares withheld for taxes	(2,101)		(2,101)
Dividends declared	(10,032)			(10,032)
Other comprehensive income (loss), net of income tax	(23,255)				(23,255)
Net income	152,659			152,659
Balance at Dec. 31, 2021	$ 699,335	$ 228	$ 295,040	$ 385,942	$ 18,125

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared, per share	$ 0.44	$ 0.36	$ 0.32

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 152,659	$ 88,419	$ 63,316
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized gains on equity securities	(22,812)	(16,855)	(12,389)
Net investment gains	(2,828)	(3,533)	(359)
Deferred tax (benefit) expense	(576)	616	(125)
Depreciation and amortization	2,308	1,574	682
Stock compensation expense	4,844	3,575	2,742
Change in operating assets and liabilities:
Investment income due and accrued	(1,021)	(1,894)	(960)
Premiums receivable, net	(22,363)	(14,158)	(10,230)
Reserves for unpaid loss and loss adjustment expenses	245,331	175,955	90,906
Unearned premiums	86,744	73,612	59,124
Reinsurance balances, net	(35,729)	(23,267)	(13,246)
Deferred policy acquisition costs	(10,056)	(8,348)	(8,763)
Income taxes (recoverable) payable	(3,882)	(1,611)	1,221
Accounts payable and accrued expenses	10,102	3,087	2,972
Other	4,321	2,802	3,466
Net cash provided by operating activities	407,042	279,974	178,357
Investing Activities:
Purchase of property and equipment	(5,920)	(32,875)	(19,622)
Sale of property and equipment	0	5,077	0
Purchases - fixed-maturity securities	(654,922)	(530,732)	(306,203)
Purchases - equity securities	(24,867)	(36,822)	(29,887)
Sales - fixed-maturity securities	113,006	119,749	35,526
Sales - equity securities	4,617	2,367	21,459
Maturities and calls - fixed-maturity securities	216,131	93,803	67,934
Net cash used in investing activities	(351,955)	(379,433)	(230,793)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	0	56,698	65,879
Proceeds from credit facility	0	25,700	17,300
Debt issuance costs	0	0	(628)
Payroll taxes withheld and remitted on share-based payments	(2,101)	(1,803)	(617)
Common stock issued, stock options exercised	982	3,622	2,750
Dividends paid	(10,021)	(8,073)	(6,929)
Net cash provided by (used in) financing activities	(11,140)	76,144	77,755
Net change in cash and cash equivalents	43,947	(23,315)	25,319
Cash and cash equivalents at beginning of period	77,093	100,408	75,089
Cash and cash equivalents at end of period	$ 121,040	$ 77,093	$ 100,408

Description of business

Description of business	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of business	Description of businessKinsale Capital Group, Inc., an insurance holding company, is a Delaware corporation that was formed in 2009 and conducts its operations through its wholly-owned subsidiaries (referred to as "Kinsale" or, with its subsidiaries, the "Company"). Kinsale Capital Group, Inc. writes excess and surplus lines insurance on a non-admitted basis principally through its insurance subsidiary, Kinsale Insurance Company ("Kinsale Insurance"), which is authorized to write business in 50 states, the District of Columbia, the Commonwealth of Puerto Rico and the U.S. Virgin Islands. Kinsale Capital Group, Inc. also markets certain products through its subsidiary, Aspera Insurance Services, Inc. ("Aspera"), an insurance broker.

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies Principles of consolidation The accompanying consolidated financial statements include the accounts of Kinsale Capital Group, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year's presentation. Use of estimates The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, if any, at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management periodically reviews its estimates and assumptions. These reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses, allowance for credit losses and uncollectible reinsurance, fair value of investments, as well as evaluating the investment portfolio for credit impairments. Cash and cash equivalents The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. Short-term investments Short-term investments are carried at cost, which approximates fair value. Short-term investments have maturities greater than three months but less than one year at the date of purchase. There were no short-term investments at December 31, 2021 or December 31, 2020. Fixed-maturity and equity securities Fixed-maturity securities are classified as available-for-sale and reported at fair value. Unrealized gains and losses on these securities are excluded from earnings but are recorded as a separate component of other comprehensive income and stockholders' equity, net of deferred income taxes. Equity securities are reported at fair value. Changes in unrealized gains and losses in fair value of these investments are recognized in net income. The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. See Note 2 for further discussion regarding the determination of credit losses. Interest on fixed-maturity securities is credited to earnings as it accrues. Premiums and discounts are amortized or accreted using the effective interest method over the lives of the related fixed maturities, or to the earliest call date for securities purchased at a premium. This method includes an adjustment for estimated principal prepayments, if any, on asset- and mortgage-backed securities. To the extent that the estimated lives of such securities change as a result of changes in estimated prepayment rates, the adjustments are included in net investment income using the retrospective method. Dividends on equity securities are included in earnings on the ex-dividend date. Realized gains and losses on disposition of investments are based on specific identification of the investments sold on the trade date. Reinsurance Reinsurance premiums, commissions, and ceded unearned premiums on reinsured business are accounted for on a basis consistent with that used in accounting for the original policies issued and the terms of the reinsurance contracts. The Company receives ceding commissions in accordance with certain reinsurance treaties. The ceding commissions are capitalized and amortized as a reduction of underwriting, acquisition and insurance expenses. Reinsurance recoverables represent paid losses and loss adjustment expenses and reserves for unpaid losses and loss adjustment expenses ceded to reinsurers that are subject to reimbursement under reinsurance treaties. The method for determining reinsurance recoverables for unpaid losses and loss adjustment expenses involves reviewing actuarial estimates of gross unpaid losses and loss adjustment expenses to determine the Company's ability to cede unpaid losses and loss adjustment expenses under the Company's existing reinsurance contracts. This method is continually reviewed and updated and any resulting adjustments are reflected in earnings in the period identified. See Note 8 for a further discussion of the Company's reinsurance program. Premiums receivable, net Premiums receivable balances are carried at face value, net of any allowance for credit losses. The allowance for credit losses represents an estimate of amounts considered uncollectible based on the Company’s assessment of the collectability of receivables that are past due. The Company recorded an allowance for credit losses of $3.4 million and $3.1 million at December 31, 2021 and 2020, respectively, and believes that all other amounts due are collectible. Deferred policy acquisition costs, net of ceding commissions The Company defers commissions, net of ceding commissions, and certain other costs that are directly related to the successful acquisition of insurance contracts. All eligible costs are capitalized and charged to expense in proportion to premium earned over the estimated policy life. To the extent that unearned premiums on existing policies are not adequate to cover the related costs and expenses, referred to as a premium deficiency, deferred policy acquisition costs are charged to earnings. The Company considers anticipated investment income in determining whether a premium deficiency exists. Property and equipment, net Property and equipment are stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives range from 39 years for the building and parking deck, 15 to 20 years for land improvements, 7 to 10 years for furniture and equipment, and 3 to 7 years for electronic data processing hardware and software. Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following: December 31, 2021 2020 (in thousands) Building $ 33,101 $ 31,675 Parking deck 5,072 5,072 Land 3,068 3,068 Equipment 3,143 2,770 Software 7,849 4,815 Furniture and fixtures 2,158 1,731 Land improvements 474 317 54,865 49,448 Accumulated depreciation (5,570) (3,262) Total property and equipment, net $ 49,295 $ 46,186 During 2020, the Company sold a portion of both the land and parking deck for approximately $6.5 million to a real estate developer for the development of an apartment building. At December 31, 2020, the Company received $5.0 million of the proceeds from the sale and is expected to receive the remaining $1.5 million upon completion of the apartment building. This receivable is included in "other assets" on the accompanying consolidated balance sheet. Intangible assets Intangible assets are recorded at fair value at the date of acquisition. The Company's intangible assets are comprised solely of indefinite-lived intangible assets, which arose from regulatory approvals granted by the various state insurance departments to write insurance business in the respective states on a non-admitted basis. In accordance with U.S. GAAP, amortization of indefinite-lived intangible assets is not permitted. Indefinite-lived intangible assets are tested for impairment during the fourth quarter on an annual basis, or earlier if there is reason to suspect that their values may have been diminished or impaired. There were no impairments recognized in 2021, 2020, or 2019. In addition, as of December 31, 2021, no triggering events occurred that suggested an updated review was necessary. Reserves for unpaid losses and loss adjustment expenses Reserves for unpaid losses and loss adjustment expenses represent management's best estimate of ultimate unpaid cost of all reported and unreported losses and loss adjustment expenses incurred prior to the financial statement date. The estimates are based on an actuarial method that uses management’s initial expected loss ratios, expected reporting patterns for losses based on industry data and the Company’s actual reported losses and loss adjustment expenses. All estimates are regularly reviewed and, as experience develops and new information becomes known, the reserves for unpaid losses and loss adjustment expenses are adjusted as necessary. Such adjustments are reflected in the results of operations in the period in which they are determined. Although management believes that the reserves for losses and loss adjustment expenses are reasonable, due to the inherent uncertainty in estimating reserves for unpaid losses and loss adjustment expenses, it is possible that the Company’s actual incurred losses and loss adjustment expenses will not develop in a manner consistent with the assumptions inherent in the determination of these reserves. If actual liabilities exceed recorded amounts, there will be an increase to the Company’s reserves resulting in a reduction in net income and stockholders’ equity in the period in which the deficiency is identified. Furthermore, management may determine that recorded reserves are more than adequate to cover expected losses which will result in a reduction to the reserves. The Company believes that the reserves for unpaid losses and loss adjustment expenses at December 31, 2021 and 2020 are adequate and represent a reasonable estimate of the Company's future obligations. See Note 7 for a further discussion of reserves for unpaid losses and loss adjustment expenses. Revenue recognition Premiums are recognized as revenue ratably over the term of the insurance contracts, net of ceded reinsurance. Unearned premiums are calculated on a daily pro rata basis. Income taxes Deferred income tax assets and liabilities are determined based on the differences between the recorded amounts and the tax bases of assets and liabilities, using enacted tax rates expected to be in effect during the year in which the basis differences reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period in which such change was enacted. Valuation allowances on deferred tax assets are estimated based on the Company's assessment of the realizability of such amounts. Valuation allowances are recorded when it is more likely than not that some portion, or all, of the deferred tax assets will not be realizable. The Company provides for uncertain tax positions, and the related interest and penalties, based upon management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax authorities. To the extent that the anticipated tax outcome of these uncertain tax positions changes, such changes in estimate will impact the income tax provision in the period in which such determination is made. The Company recognizes accrued interest and penalties related to uncertain tax positions as a component of income tax expense. The Company uses the portfolio approach to release stranded tax effects in accumulated other comprehensive income ("AOCI") related to its available-for-sale fixed-maturity securities. Under this approach, stranded tax effects remaining in AOCI are released only when the entire portfolio of the available-for-sale fixed-maturity securities are liquidated, sold or extinguished. Commitments and contingencies Liabilities for loss contingencies, arising from noninsurance policy claims, assessments, litigation, fines, and penalties and other sources, are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred. Fair value of financial instruments Fair value is estimated for each class of financial instrument based on the framework established in the fair value accounting guidance. This guidance requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value hierarchy disclosures are based on the quality of inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). See Note 3 for further details regarding fair value disclosures. Stock-based compensation Stock-based compensation is expensed based upon the estimated fair value of employee stock awards. Compensation cost for awards of equity instruments to employees is measured based on the grant-date fair value of those awards and compensation expense is recognized over the service period that the awards vest. Forfeitures of stock-based compensation awards are recognized as they occur. See Note 9 for further discussion and related disclosures regarding stock-based compensation. Recently adopted accounting pronouncements Accounting Standards Update ("ASU") 2016-13, Financial Instruments – Credit Losses (Topic 326) On June 16, 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. The update requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected by means of an allowance for credit losses that runs through net income. Credit losses relating to available-for-sale fixed- maturity securities must also be recorded through an allowance for credit losses, which is limited to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under previous U.S. GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. The FASB has issued additional ASUs on Topic 326 that do not change the core principle of the guidance in ASU 2016-13 but clarify certain aspects of it. Effective January 1, 2020, the Company adopted this ASU using the modified-retrospective approach and recorded a cumulative effect adjustment to beginning retained earnings. The adoption of this ASU resulted in the recognition of an allowance for credit loss related to the Company’s reinsurance recoverables. However, since the Company enters into contracts with reinsurers that have A.M. Best ratings of “A” (Excellent) or better, the allowance was not material to the Company’s consolidated financial statements. ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes In December 2019, the FASB issued updated guidance for the accounting for income taxes. The updated guidance is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other existing guidance to simplify several income tax accounting matters. Effective January 1, 2021, the Company adopted ASU 2019-12 using a modified-retrospective approach. The adoption of ASU 2019-12 did not have a material impact on the Company's consolidated financial statements. Prospective accounting pronouncements There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company's consolidated financial statements.

Investments

Investments	12 Months Ended
	Dec. 31, 2021
Investments [Abstract]
Investments	Investments Available-for-sale investments The following tables summarize the Company’s available-for-sale investments at December 31, 2021 and 2020: December 31, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,936 $ — $ (89) $ 6,847 Obligations of states, municipalities and political subdivisions 216,375 12,139 (469) 228,045 Corporate and other securities 450,594 11,714 (3,821) 458,487 Asset-backed securities 299,810 2,217 (252) 301,775 Residential mortgage-backed securities 340,804 1,804 (4,923) 337,685 Commercial mortgage-backed securities 57,000 2,433 (206) 59,227 Total fixed-maturity investments $ 1,371,519 $ 30,307 $ (9,760) $ 1,392,066 December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Fixed maturities: Obligations of states, municipalities and political subdivisions $ 216,181 $ 14,792 $ (67) $ 230,906 Corporate and other securities 294,854 21,840 (86) 316,608 Asset-backed securities 236,813 4,230 (382) 240,661 Residential mortgage-backed securities 217,859 4,938 (141) 222,656 Commercial mortgage-backed securities 66,110 4,886 (27) 70,969 Total fixed-maturity investments $ 1,031,817 $ 50,686 $ (703) $ 1,081,800 Available-for-sale investments in a loss position The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. The Company considers a number of factors in completing its review of credit losses, including the extent to which a security's fair value has been below cost and the financial condition of an issuer. In addition to specific issuer information, the Company also evaluates the current market and interest rate environment. Generally, a change in a security’s value caused by a change in the market or interest rate environment does not constitute a credit loss. For fixed-maturity securities, the Company also considers whether it intends to sell the security or if it is more likely than not that it will be required to sell the security before recovery and the ability to recover all amounts outstanding when contractually due. When assessing whether it intends to sell a fixed-maturity security or if it is likely to be required to sell a fixed-maturity security before recovery of its amortized cost, the Company evaluates facts and circumstances including, but not limited to, decisions to reposition the investment portfolio, potential sales of investments to meet cash flow needs and potential sales of investments to capitalize on favorable pricing. For fixed-maturity securities where a decline in fair value is below the amortized cost basis and the Company intends to sell the security, or it is more likely than not that the Company will be required to sell the security before recovery of its amortized cost, an impairment is recognized in net income based on the fair value of the security at the time of assessment. For fixed-maturity securities that the Company does not intend to sell or for which it is more likely than not that the Company would not be required to sell before recovery of its amortized cost, the Company compares the estimated present value of the cash flows expected to be collected to the amortized cost of the security. The extent to which the estimated present value of the cash flows expected to be collected is less than the amortized cost of the security represents the credit-related portion of the impairment, which is recognized in net income through an allowance for credit losses. Any remaining decline in fair value represents the noncredit portion of the impairment, which is recognized in other comprehensive income. The Company reports investment income due and accrued separately from fixed-maturity securities, available for sale, and has elected not to measure an allowance for credit losses for investment income due and accrued. Investment income due and accrued is written off through earnings at the time the issuer of the bond defaults or is expected to default on payments. The following tables summarize gross unrealized losses and estimated fair value for available-for-sale investments by length of time that the securities have continuously been in an unrealized loss position: December 31, 2021 Less than 12 Months 12 Months or Longer Total Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,847 $ (89) $ — $ — $ 6,847 $ (89) Obligations of states, municipalities and political subdivisions 23,870 (469) — — 23,870 (469) Corporate and other securities 188,522 (3,718) 1,092 (103) 189,614 (3,821) Asset-backed securities 136,669 (204) 4,452 (48) 141,121 (252) Residential mortgage-backed securities 260,251 (4,329) 17,968 (594) 278,219 (4,923) Commercial mortgage-backed securities 10,773 (206) — — 10,773 (206) Total fixed-maturity investments $ 626,932 $ (9,015) $ 23,512 $ (745) $ 650,444 $ (9,760) At December 31, 2021, the Company held 234 fixed-maturity securities with a total estimated fair value of $650.4 million and gross unrealized losses of $9.8 million. Of those securities, 10 were in a continuous unrealized loss position for greater than one year. As discussed above, the Company regularly reviews all fixed-maturity securities within its investment portfolio to determine whether a credit loss has occurred. Based on the Company's review as of December 31, 2021, unrealized losses were caused by interest rate changes or other market factors and were not credit-specific issues. At December 31, 2021, 81.5% of the Company’s fixed-maturity securities were rated "A-" or better and all of Company's fixed-maturity securities made expected coupon payments under the contractual terms of the securities. Based on its review, the Company concluded that there were no credit losses from fixed-maturity securities with unrealized losses for the year ended December 31, 2021. December 31, 2020 Less than 12 Months 12 Months or Longer Total Estimated Fair Value Gross Unrealized Holding Losses Estimated Fair Value Gross Unrealized Holding Losses Estimated Fair Value Gross Unrealized Holding Losses (in thousands) Fixed maturities: Obligations of states, municipalities and political subdivisions $ 6,412 $ (67) $ — $ — $ 6,412 $ (67) Corporate and other securities 3,829 (86) — — 3,829 (86) Asset-backed securities 57,750 (149) 23,825 (233) 81,575 (382) Residential mortgage-backed securities 46,869 (129) 266 (12) 47,135 (141) Commercial mortgage-backed securities 4,971 (27) — — 4,971 (27) Total fixed-maturity investments $ 119,831 $ (458) $ 24,091 $ (245) $ 143,922 $ (703) Contractual maturities of available-for-sale fixed-maturity securities The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at December 31, 2021 are summarized, by contractual maturity, as follows: Amortized Estimated Cost Fair Value (in thousands) Due in one year or less $ 6,742 $ 6,822 Due after one year through five years 185,273 189,497 Due after five years through ten years 226,707 232,197 Due after ten years 255,183 264,863 Asset-backed securities 299,810 301,775 Residential mortgage-backed securities 340,804 337,685 Commercial mortgage-backed securities 57,000 59,227 Total fixed maturities $ 1,371,519 $ 1,392,066 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties, and the lenders may have the right to put the securities back to the borrower. Net investment income The following table presents the components of net investment income: Year Ended December 31, 2021 2020 2019 (in thousands) Interest: Taxable bonds $ 25,654 $ 20,493 $ 14,853 Municipal bonds (tax exempt) 3,501 3,618 3,692 Cash equivalents and short-term investments 12 262 842 Dividends on equity securities 3,962 3,512 2,136 Gross investment income 33,129 27,885 21,523 Investment expenses (2,081) (1,775) (1,390) Net investment income $ 31,048 $ 26,110 $ 20,133 Realized investment gains and losses The following table presents realized investment gains and losses: Year Ended December 31, 2021 2020 2019 (in thousands) Fixed-maturity securities: Realized gains $ 2,944 $ 4,022 $ 567 Realized losses (3) (383) (79) Net realized gains from fixed-maturity securities 2,941 3,639 488 Equity securities: Realized gains 97 — 556 Realized losses (210) (119) (688) Net realized losses from equity securities (113) (119) (132) Short-term securities - realized gains — 13 3 Net realized investment gains $ 2,828 $ 3,533 $ 359 Change in net unrealized (losses) gains on fixed-maturity securities The change in net unrealized (losses) gains for fixed-maturity securities was $(29.4) million, $35.3 million, and $18.7 million for the years ended December 31, 2021, 2020, and 2019 respectively. Insurance – statutory deposits The Company had invested assets with a carrying value of $6.7 million and $6.9 million on deposit with state regulatory authorities at December 31, 2021 and 2020, respectively. Payable for investments purchased The Company recorded a payable for investments purchased, not yet settled, of $15.0 million at December 31, 2021. The payable balance was included in the "other liabilities" line item of the consolidated balance sheet.

Fair value measurements

Fair value measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements Fair value is estimated for each class of financial instrument based on the framework established in the fair value accounting guidance. Fair value is defined as the price in the principal market that would be received for an asset or paid to transfer a liability to facilitate an orderly transaction between market participants on the measurement date. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not acting under duress. Fair value hierarchy disclosures are based on the quality of inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. The three levels of the fair value hierarchy are defined as follows: Level 1 - Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities traded in active markets. Level 2 - Inputs to the valuation methodology 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 and market-corroborated inputs. Level 3 - Inputs to the valuation methodology are unobservable for the asset or liability and are significant to the fair value measurement. Fair values of the Company's investment portfolio are estimated using unadjusted prices obtained by its investment accounting vendor from nationally recognized third-party pricing services, where available. Values for U.S. Treasuries and exchange traded funds are generally based on Level 1 inputs which use quoted prices in active markets for identical assets. For other fixed-maturity securities and non-redeemable preferred stock, the pricing vendors use a pricing methodology involving the market approach, including pricing models which use prices and relevant market information regarding a particular security or securities with similar characteristics to establish a valuation. The estimates of fair value of these investments are included in the amounts disclosed as Level 2. For those investments where significant inputs are unobservable, the Company's investment accounting vendor obtains valuations from pricing vendors or brokers using the market approach and income approach valuation techniques and are disclosed as Level 3. Management performs several procedures to ascertain the reasonableness of investment values included in the consolidated financial statements at December 31, 2021 and 2020, including 1) obtaining and reviewing internal control reports from the Company's investment accounting vendor that assess fair values from third party pricing services, 2) discussing with the Company's investment accounting vendor its process for reviewing and validating pricing obtained from third party pricing services and 3) reviewing the security pricing received from the Company's investment accounting vendor and monitoring changes in unrealized gains and losses at the individual security level. The Company has evaluated the various types of securities in its investment portfolio to determine an appropriate fair value hierarchy level based upon trading activity and the observability of market inputs. The following tables present the balances of assets measured at fair value on a recurring basis as of December 31, 2021 and 2020, by level within the fair value hierarchy. December 31, 2021 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,847 $ — $ — $ 6,847 Obligations of states, municipalities and political subdivisions — 228,045 — 228,045 Corporate and other securities — 458,487 — 458,487 Asset-backed securities — 301,775 — 301,775 Residential mortgage-backed securities — 337,685 — 337,685 Commercial mortgage-backed securities — 59,227 — 59,227 Total fixed maturities 6,847 1,385,219 — 1,392,066 Equity securities: Exchange traded funds 123,389 — — 123,389 Non-redeemable preferred stock — 49,222 — 49,222 Total equity securities 123,389 49,222 — 172,611 Total $ 130,236 $ 1,434,441 $ — $ 1,564,677 December 31, 2020 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: Obligations of states, municipalities and political subdivisions $ — $ 230,906 $ — $ 230,906 Corporate and other securities — 316,608 — 316,608 Asset-backed securities — 240,661 — 240,661 Residential mortgage-backed securities — 222,656 — 222,656 Commercial mortgage-backed securities — 70,969 — 70,969 Total fixed maturities — 1,081,800 — 1,081,800 Equity securities: Exchange traded funds 98,050 — — 98,050 Non-redeemable preferred stock — 31,612 — 31,612 Total equity securities 98,050 31,612 — 129,662 Total $ 98,050 $ 1,113,412 $ — $ 1,211,462 There were no assets or liabilities measured at fair value on a nonrecurring basis as of December 31, 2021 or 2020. The Company holds cash equivalents that are managed as part of its investment portfolio and, due to the short-term maturities of these assets, the carrying value of these investments approximates fair value. The Company held cash equivalents of $44.7 million and $13.7 million at December 31, 2021 and 2020, respectively. In addition, the estimated fair value of the Credit Facility approximated its carrying value as of December 31, 2021 and 2020. See Note 11 for further information regarding the Credit Facility.

Deferred policy acquisition cos

Deferred policy acquisition costs	12 Months Ended
	Dec. 31, 2021
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred policy acquisition costs	Deferred policy acquisition costs The following table presents the amounts of policy acquisition costs deferred and amortized for the years ended: Year Ended December 31, 2021 2020 2019 (in thousands) Balance, beginning of year $ 31,912 $ 23,564 $ 14,801 Policy acquisition costs deferred: Direct commissions 111,463 80,682 56,841 Ceding commissions (28,965) (18,879) (12,373) Other underwriting and policy acquisition costs 6,191 4,478 3,727 Policy acquisition costs deferred 88,689 66,281 48,195 Amortization of net policy acquisition costs (78,633) (57,933) (39,432) Balance, end of year $ 41,968 $ 31,912 $ 23,564 Amortization of net policy acquisition costs is included in the line item "Underwriting, acquisition and insurance expenses" in the accompanying consolidated statements of income and comprehensive income.

Underwriting, acquisition and i

Underwriting, acquisition and insurance expenses	12 Months Ended
	Dec. 31, 2021
Underwriting, Acquisition and Insurance Expenses [Abstract]
Underwriting, acquisition and insurance expenses	Underwriting, acquisition and insurance expenses Underwriting, acquisition and insurance expenses consist of the following: Year Ended December 31, 2021 2020 2019 (in thousands) Underwriting, acquisition and insurance expenses incurred: Direct commissions $ 98,847 $ 69,922 $ 48,382 Ceding commissions (25,702) (16,145) (12,347) Other operating expenses 51,755 40,519 34,182 Total $ 124,900 $ 94,296 $ 70,217 Other operating expenses within underwriting, acquisition and insurance expenses included salaries, employee benefits and bonus expense of $48.9 million, $35.9 million and $27.8 million, for the years ended December 31, 2021, 2020 and 2019, respectively.

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income taxes	Income taxes The Company’s subsidiaries file a consolidated U.S. federal income tax return. Under a tax sharing agreement, Kinsale collects from or refunds to its subsidiaries the amount of taxes determined as if Kinsale and the subsidiaries filed separate returns. The Company is no longer subject to income tax examination by tax authorities for the years ended before January 1, 2018. Income tax expense includes the following components for the years ending December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 (in thousands) Current federal income tax expense $ 36,718 $ 11,378 $ 12,860 Deferred federal income tax (benefit) expense (576) 616 (125) Income tax expense $ 36,142 $ 11,994 $ 12,735 The Company paid $40.6 million, $13.0 million and $11.6 million in federal income taxes during the years ended December 31, 2021, 2020 and 2019, respectively. Current income taxes recoverable was $5.1 million and $1.2 million at December 31, 2021 and 2020, respectively and included in "other assets" in the accompanying consolidated balance sheets. The prevailing federal income tax rate was 21% in 2021, 2020 and 2019. The Company’s effective income tax rate on income before income taxes differs from the prevailing federal income tax rate and is summarized as follows: Year ended December 31, 2021 2020 2019 (in thousands) Income tax expense at federal income tax rate $ 39,648 $ 21,087 $ 15,971 Stock options exercised (2,148) (7,634) (2,411) Restricted stock award vesting (677) (658) (153) Tax-exempt investment income (546) (565) (577) Other (135) (236) (95) Total $ 36,142 $ 11,994 $ 12,735 The significant components of the net deferred tax asset (liability) are summarized as follows: December 31, 2021 2020 (in thousands) Deferred tax assets: Unpaid losses and loss adjustment expenses $ 15,723 $ 11,736 Unearned premiums 13,190 9,942 State operating loss carryforwards 4,554 3,833 Stock compensation 1,140 865 Allowance for credit losses 712 649 Other 278 254 Deferred tax assets before allowance 35,597 27,279 Less: valuation allowance (4,159) (3,491) Total deferred tax assets 31,438 23,788 Deferred tax liabilities: Unrealized gains on fixed-maturity securities 4,315 10,497 Unrealized gains on equity securities 11,368 6,552 Deferred policy acquisition costs, net of ceding commissions 8,813 6,701 Property and equipment 2,741 2,433 Transition adjustment for loss reserve discount 1,025 1,281 Intangible assets 743 743 Other 324 229 Total deferred tax liabilities 29,329 28,436 Net deferred tax asset (liability) $ 2,109 $ (4,648) At December 31, 2021 and 2020, the Company had state net operating losses ("NOLs") of $96.1 million and $80.9 million, respectively. The state NOLs are available to offset future taxable income or reduce taxes payable and begin expiring in 2029. Management evaluates the need for a valuation allowance related to its deferred tax assets. At December 31, 2021 and 2020, the Company recorded a tax valuation allowance equal to the state NOLs and the deferred tax assets, net of existing deferred tax liabilities that were expected to reverse in future periods, related to certain state jurisdictions. No other valuation allowances were established against the Company’s deferred tax assets at December 31, 2021 and 2020, as the Company believes that it is more likely than not that the remaining deferred tax assets will be realized given the carry back availability, reversal of existing temporary differences and future taxable income. The Company did not have any material uncertain tax positions in 2021 or 2020. Management is not aware of any events that would give rise to any uncertain tax positions.

Reserves for unpaid losses and

Reserves for unpaid losses and loss adjustment expenses	12 Months Ended
	Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Abstract]
Reserves for unpaid losses and loss adjustment expenses	Reserves for unpaid losses and loss adjustment expenses The reserves for unpaid losses and loss adjustment expenses represent the Company's estimated ultimate cost of all unreported and reported but unpaid insured claims and the cost to adjust these losses that have occurred as of or before the balance sheet date. Reserves are estimated using individual case-basis valuations of reported claims and statistical analyses. Case reserves are established for individual claims that have been reported to the Company, typically by the Company's insureds or their brokers. Based on the information provided, case reserves are established by estimating the ultimate losses from the claim, including defense costs associated with the ultimate settlement of the claim. Incurred-but-not-reported ("IBNR") reserves are determined using actuarial methods to estimate losses that have occurred but have not yet been reported to the Company. The incurred Bornhuetter-Ferguson actuarial method ("BF method") is used to arrive at the Company's loss reserve estimates for each line of business. This method estimates the reserves based on the initial expected loss ratio and expected reporting patterns for losses. Because the Company has a limited number of years of loss experience compared to the period over which losses are expected to be reported, the Company uses industry and peer-group data, in addition to its own data, as a basis for selecting its expected reporting patterns. As part of the reserving process, the Company reviews historical data and considers the effect of various factors on claims development patterns including polices written on a "claims made" versus "occurrence" basis. Policies written on a claims made basis provide coverage to the insured only for losses incurred during the coverage period, and only if the claim was reported during a specified reporting period. Policies written on an occurrence basis provide coverage to the insured for liabilities arising from events occurring during the term of the policy, regardless of when a claim is actually made. Accordingly, claims related to policies written on an occurrence basis may arise many years after a policy has lapsed. Property losses, while written on an occurrence basis, are generally reported within a short time from the date of loss, and in most instances, property claims are settled and paid within a relatively short period of time. The following table presents a reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses: December 31, 2021 2020 2019 (in thousands) Gross reserves for unpaid losses and loss adjustment expenses, beginning of year $ 636,013 $ 460,058 $ 369,152 Less: reinsurance recoverable on unpaid losses 83,730 69,792 55,389 Adoption of new accounting standard for credit losses — (282) — Net reserves for unpaid losses and loss adjustment expenses, beginning of year 552,283 390,548 313,763 Incurred losses and loss adjustment expenses: Current year 356,401 277,140 178,986 Prior year (31,986) (13,338) (9,423) Total net losses and loss adjustment expenses incurred 324,415 263,802 169,563 Payments: Current year 23,765 27,664 19,054 Prior year 89,150 74,403 74,006 Total payments 112,915 102,067 93,060 Net reserves for unpaid losses and loss adjustment expenses, end of year 763,783 552,283 390,266 Reinsurance recoverable on unpaid losses, net of allowance 117,561 83,730 69,792 Gross reserves for unpaid losses and loss adjustment expenses, end of year $ 881,344 $ 636,013 $ 460,058 During the year ended December 31, 2021, prior accident years developed favorably by $32.0 million, of which $33.7 million was attributable to the 2020 accident year and was related to a lower-than-expected level of reported losses. Although the Company does not have any significant direct COVID-19 exposure, the related disruption in the court system and the general economy created additional uncertainty in estimating loss reserves in 2020. As a result, 2020 accident year actuarial assumptions were adjusted in 2020 to increase IBNR to account for this additional uncertainty. The Company's current outlook is more favorable than in the prior year and, based on observed trends, the Company reevaluated and adjusted certain assumptions for accident year 2020 in 2021 to reflect the favorable experience. In addition, $3.8 million of favorable development was attributable to accident year 2019 due to reported losses emerging at lower levels than expected. This favorable development was offset in part by adverse development, mostly attributable to the 2016 and 2018 accident years due to modest adjustments in actuarial assumptions. Current accident year incurred losses and loss adjustment expenses for the year ended December 31, 2021 included $8.6 million of catastrophe losses primarily related to Hurricane Ida and winter storms Uri and Viola in Texas. During the year ended December 31, 2020, our net incurred losses for accident years 2019 and prior developed favorably by $13.3 million. This favorable development included $10.5 million for the 2019 accident year and $1.8 million for the 2018 accident year. This favorable development was primarily due to reported losses emerging at a lower level than expected, largely across the other liability and excess lines of business. Current year incurred losses and loss adjustment expenses for the year ended December 31, 2020 included $23.2 million of catastrophe losses primarily related to Hurricane Laura, Hurricane Sally and the California wildfires. During the year ended December 31, 2019, our net incurred losses for accident years 2018 and prior developed favorably by $9.4 million. This favorable development included $13.0 million for the 2018 accident year, $1.6 million for the 2017 accident year. This favorable development was primarily due to reported losses emerging at a lower level than expected, on the other liability and products liability lines of business. The favorable development was offset by adverse development of $5.2 million for the 2011 through 2015 accident years. The unfavorable development was primarily attributable to the other liability occurrence line of business. This adverse development largely resulted from management’s decision to lengthen the actuarial loss development factors to provide for emergence of reported losses over a longer period of time based on trends observed in loss experience, which added a modest amount of conservatism to the Company’s IBNR reserves. Incurred and Paid Claims Development The following is information about incurred and paid claims development as of December 31, 2021, net of reinsurance, as well as cumulative claim frequency and the total of IBNR liabilities plus expected development on reported claims included within the net incurred claims amounts. The development and claims duration tables below exclude commuted multi-line quota-share reinsurance treaty ("MLQS") contracts, which would distort development patterns related to those transactions. Cumulative number of reported claims is reported on a per claim basis. The information about incurred and paid claims development for the years ended December 31, 2012 to December 31, 2020, is presented as unaudited supplementary information. Property Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, As of December 31, 2021 Accident Year 2017 2018 2019 2020 2021 Total of IBNR Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims ($ in thousands) 2017 $ 12,473 $ 11,705 $ 11,676 $ 11,631 $ 11,606 $ — 1,041 2018 11,559 12,004 12,698 12,704 26 650 2019 14,914 13,909 15,572 154 642 2020 40,612 37,939 1,234 2,294 2021 36,531 9,323 1,034 Total $ 114,352 Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, Accident Year 2017 2018 2019 2020 2021 ($ in thousands) 2017 $ 9,938 $ 11,233 $ 11,602 $ 11,608 $ 11,605 2018 9,132 11,646 12,599 12,660 2019 9,852 12,581 13,996 2020 19,897 30,321 2021 14,268 Total 82,850 All outstanding liabilities before 2017, net of reinsurance — Liabilities for claims and claim adjustment expenses, net of reinsurance $ 31,502 Historical Claims Duration The following is supplementary information about average historical claims duration as of December 31, 2021: Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) Years 1 2 3 4 5 Property 62.5 % 19.0 % 6.6 % 0.3 % — % Casualty - Claims Made Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, As of December 31, 2021 Accident Year 2012 2013 2014 Unaudited 2015 2016 2017 2018 2019 Unaudited 2020 Unaudited 2021 Total of IBNR Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims 2012 $ 7,913 $ 5,749 $ 4,205 $ 3,102 $ 2,845 $ 2,477 $ 2,314 $ 2,207 $ 2,136 $ 1,867 $ 136 138 2013 15,238 11,639 9,113 7,917 7,002 6,463 6,128 6,087 6,215 356 228 2014 18,847 14,289 11,748 11,217 10,948 10,988 10,620 10,266 638 273 2015 18,883 16,777 14,896 13,583 13,942 13,548 13,414 937 258 2016 19,170 14,693 14,675 14,322 13,583 13,602 1,431 310 2017 18,116 17,097 16,120 15,794 14,989 2,434 371 2018 22,429 20,234 18,612 17,057 5,108 464 2019 34,693 29,056 26,426 11,037 550 2020 55,630 44,641 31,667 772 2021 84,018 74,017 1,035 Total $ 232,495 Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, Accident Year 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2012 $ 153 $ 475 $ 877 $ 1,024 $ 1,090 $ 1,882 $ 1,946 $ 1,946 $ 1,946 $ 1,732 2013 499 1,915 4,436 5,070 5,320 5,439 5,482 5,612 5,843 2014 435 1,865 5,039 6,385 8,290 9,415 9,491 9,628 2015 217 4,496 7,563 9,238 11,372 11,522 12,142 2016 1,158 3,015 6,907 9,839 11,381 12,105 2017 340 4,897 8,252 10,484 11,357 2018 507 5,030 8,931 10,330 2019 2,487 6,005 10,123 2020 1,002 7,446 2021 1,146 Total 81,852 All outstanding liabilities before 2012, net of reinsurance 56 Liabilities for claims and claim adjustment expenses, net of reinsurance $ 150,699 Casualty - Occurrence Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, As of December 31, 2021 Accident Year 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Total of IBNR Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims 2012 $ 16,977 $ 17,436 $ 18,803 $ 20,401 $ 20,579 $ 22,001 $ 22,401 $ 23,223 $ 23,197 $ 22,271 $ 997 597 2013 30,616 28,771 28,037 29,039 31,731 33,248 33,973 33,128 33,002 2,273 872 2014 47,805 40,668 38,049 36,678 39,313 41,859 42,434 41,367 4,374 1,230 2015 59,717 51,739 49,122 52,100 54,697 54,090 54,090 7,108 1,700 2016 61,440 55,680 53,549 55,534 57,401 60,861 10,378 1,518 2017 71,126 67,151 68,985 70,641 71,117 18,282 1,843 2018 86,157 78,331 78,386 83,952 33,875 1,918 2019 112,266 109,994 108,138 63,673 2,006 2020 154,619 136,212 119,143 1,761 2021 200,598 190,069 1,332 Total $ 811,608 Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, Accident Year 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2012 $ 757 $ 4,441 $ 7,850 $ 11,238 $ 14,382 $ 16,474 $ 19,383 $ 20,707 $ 21,408 $ 20,805 2013 1,099 4,469 7,957 14,890 21,348 26,715 28,248 29,610 30,116 2014 698 3,081 8,489 17,576 23,771 31,026 34,338 35,807 2015 941 3,161 12,685 28,385 37,690 41,724 44,161 2016 1,099 6,015 17,225 28,924 34,437 43,311 2017 1,581 9,352 22,407 37,736 46,025 2018 2,638 10,995 22,860 35,138 2019 3,944 16,687 30,518 2020 2,400 8,673 2021 3,205 Total 297,759 All outstanding liabilities before 2012, net of reinsurance 329 Liabilities for claims and claim adjustment expenses, net of reinsurance $ 514,178 Historical Claims Duration The following is supplementary information about average historical claims duration as of December 31, 2021: Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) Years 1 2 3 4 5 6 7 8 9 10 Casualty - claims made 4.9 % 20.5 % 25.7 % 12.6 % 9.9 % 12.3 % 2.4 % 1.1 % 1.9 % — % Casualty - occurrence 2.4 % 9.1 % 15.0 % 20.4 % 14.4 % 13.0 % 7.6 % 4.5 % 2.3 % — % Reconciliation of Incurred and Paid Claims Development to the Liability for Unpaid Claims and Claim Adjustment Expenses The reconciliation of the net incurred and paid claims development tables to the liability for unpaid claims and claim adjustment expenses in the consolidated statement of financial position is as follows: (in thousands) December 31, 2021 Net outstanding liabilities Property $ 31,502 Casualty - claims made 150,699 Casualty - occurrence 514,178 Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance 696,379 Reinsurance recoverable on unpaid claims Property 16,777 Casualty - claims made 16,581 Casualty - occurrence 84,203 Total reinsurance recoverable on unpaid claims 117,561 Unallocated claims adjustment expenses 67,404 Gross liability for unpaid claims and claim adjustment expense $ 881,344

Reinsurance

Reinsurance	12 Months Ended
	Dec. 31, 2021
Reinsurance Disclosures [Abstract]
Reinsurance	Reinsurance The Company purchases reinsurance from other insurance companies ("reinsurers") in order to limit its exposure to large losses and enable it to underwrite policies with sufficient limits to meet policyholder needs. In a reinsurance transaction, an insurance company transfers, or cedes, part or all of its exposure to the reinsurer that receives a portion of the premium. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policy coverage, and therefore the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance agreement. The following table summarizes the effect of reinsurance on premiums written and earned: Year Ended December 31, 2021 2020 2019 (in thousands) Written: Direct $ 764,373 $ 552,814 $ 389,569 Assumed — — 125 Ceded (104,164) (74,595) (47,633) Net written $ 660,209 $ 478,219 $ 342,061 Earned: Direct $ 677,630 $ 479,181 $ 330,464 Assumed — 21 104 Ceded (94,751) (66,448) (47,587) Net earned $ 582,879 $ 412,754 $ 282,981 Incurred losses and loss adjustment expenses were net of reinsurance recoverables (ceded incurred losses and loss adjustment expenses) of $49.7 million, $42.0 million and $27.2 million for the years ended December 31, 2021, 2020 and 2019, respectively. Reinsurance balances The following table presents reinsurance recoverables on paid and unpaid losses as of December 31, 2021 and 2020: December 31, 2021 December 31, 2020 (in thousands) Reinsurance recoverables on paid losses $ 5,409 $ 9,485 Reinsurance recoverables on unpaid losses 117,561 83,730 Reinsurance recoverables $ 122,970 $ 93,215 Credit risk exists with reinsurance ceded to the extent that any reinsurer is unable to meet the obligations assumed under the reinsurance agreements. Allowances are established for amounts deemed uncollectible. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk arising from its exposure to individual reinsurers. All reinsurance recoverables are from companies with A.M. Best ratings of "A" (Excellent) or better. To further reduce credit exposure to reinsurance recoverable balances, the Company has received letters of credit from certain reinsurers that are not authorized as reinsurers under U.S. state insurance regulations. The Company recorded an allowance for credit losses of $0.4 million and $0.3 million related to its reinsurance balances at December 31, 2021 and 2020, respectively; however, the deterioration in the credit quality of existing reinsurers or disputes over reinsurance agreements could result in future charges. At December 31, 2021, reinsurance recoverables on paid and unpaid losses from the Company’s five largest reinsurers were $28.0 million, $27.4 million, $16.3 million, $10.2 million and $9.5 million, representing 74.3% of the total balance.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2021
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' equity	Stockholders’ equity Capital Stock The Company’s authorized capital stock consists of 400,000,000 shares of common stock, par value $0.01 per share, and 100,000,000 shares of preferred stock, par value $0.01 per share. There were no shares of preferred stock issued or outstanding at December 31, 2021 or 2020. Public Offerings On August 7, 2020, the Company completed an underwritten public offering and sold and issued 310,500 shares of its common stock at a price of $190.00 per share. After deducting underwriting discounts and commissions and offering expenses, the Company received net proceeds of $56.7 million. On August 12, 2019, the Company completed an underwritten public offering and sold and issued 741,750 shares of its common stock at a price of $93.00 per share. After deducting underwriter discounts and commissions and offering expenses, the Company received net proceeds from the offering of approximately $65.9 million. Equity-based Compensation On July 27, 2016, the Kinsale Capital Group, Inc. 2016 Omnibus Incentive Plan (the "2016 Incentive Plan") became effective. The 2016 Incentive Plan, which is administered by the Compensation, Nominating and Corporate Governance Committee of the Company's Board of Directors, provides for grants of stock options, restricted stock, restricted stock units and other stock-based awards to officers, employees, directors, independent contractors and consultants. The number of shares of common stock available for issuance under the 2016 Incentive Plan may not exceed 2,073,832. The Company recognized total equity-based compensation expense of $4.8 million, $3.6 million and $2.7 million for the years ended December 31, 2021, 2020 and 2019, respectively. Stock Options On July 27, 2016, the Board of Directors approved, and the Company granted, 1,036,916 stock options with an exercise price equal to the initial public offering price of $16.00 per share. The options have a maximum contractual term of 10 years and vested in 4 equal annual installments following the date of the grant. The weighted average grant date fair value of options granted during 2016 was $2.71 per share. The value of the options granted was estimated at the date of grant using the Black-Scholes pricing model using the following assumptions: Risk-free rate of return 1.26 % Dividend yield 1.25 % Expected share price volatility (1) 18.50 % Expected life in years (2) 6.3 years (1) Expected volatility was based on the Company’s competitors within the industry. (2) Expected life was calculated using the simplified method, which was an average of the contractual term of the option and its ordinary vesting period, as the Company did not have sufficient historical data for determining the expected term of our stock option awards. A summary of option activity as of December 31, 2021 and changes during the year then ended is presented below: Number of Shares Weighted-average exercise price Weighted-average remaining years of contractual life Aggregate intrinsic value (in thousands) Outstanding at December 31, 2020 387,738 $ 16.00 Granted — — Forfeited (934) 16.00 Exercised (61,371) 16.00 Outstanding at December 31, 2021 325,433 $ 16.00 4.6 $ 72,210 Exercisable at December 31, 2021 325,433 $ 16.00 4.6 $ 72,210 The total intrinsic value of options exercised was $10.4 million during the year ended December 31, 2021 and $37.0 million during the year ended December 31, 2020. Restricted Stock Awards During 2021, the Board of Directors approved, and the Company granted, restricted stock awards under the 2016 Incentive Plan. The restricted stock awards were valued on the date of grant and will vest over a period of 1 to 4 years corresponding to the anniversary date of the grants. The fair value of restricted stock awards was determined based on the closing trading price of the Company’s common stock on the grant date or, if no common stock was traded on the grant date, the last preceding date for which there was a sale of common stock. Except for restrictions placed on the transferability of restricted stock, holders of unvested restricted stock have full stockholder’s rights, including voting rights and the right to receive cash dividends. Unvested restricted stock awards and accrued dividends, if any, are forfeited upon the termination of service to or employment with the Company. A summary of restricted stock activity under the equity compensation plans for the year ended is as follows: December 31, 2021 Number of Shares Weighted Average Grant Date Fair Value per Share Nonvested outstanding at the beginning of the period 108,392 $ 97.40 Granted 35,870 $ 185.00 Vested (41,121) $ 87.82 Forfeited (7,157) $ 128.11 Nonvested outstanding at the end of the period 95,984 $ 131.94 Employees surrender restricted stock awards to pay for withholding tax obligations resulting from any vesting of those awards. During the year ended December 31, 2021, restricted stock awards withheld for taxes in connection with the vesting of those awards totaled 12,958. The per share weighted average grant-date fair value of the Company's restricted stock awards granted during the years ended December 31, 2021, 2020, and 2019 was $185.00, $147.45 and $80.59, respectively. The fair value of restricted stock awards that vested during the year ended December 31, 2021, 2020 and 2019 was $6.8 million, $5.8 million and $2.1 million respectively. As of December 31, 2021, the Company had $9.1 million of total unrecognized stock-based compensation expense expected to be charged to earnings over a weighted-average period of 2.6 years. Subsequent Events The Board of Directors granted 3,528 restricted stock awards on January 1, 2022 under the 2016 Incentive Plan to the Company’s non-employee directors. The restricted stock awards had a fair value on the date of grant of $237.89 per share and will vest on the first anniversary date of the grant.

Earnings per share

Earnings per share	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings per share	Earnings per share The following table represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements: Year ended December 31, 2021 2020 2019 (in thousands, except per share data) Net income $ 152,659 $ 88,419 $ 63,316 Weighted average common shares outstanding - basic 22,693 22,319 21,528 Dilutive effect of shares issued under stock compensation arrangements: Stock options 324 469 570 Restricted stock awards 45 64 38 Total dilutive effect of shares issued under stock compensation arrangements 369 533 608 Weighted average common shares outstanding - diluted 23,062 22,852 22,136 Earnings per common share: Basic $ 6.73 $ 3.96 $ 2.94 Diluted $ 6.62 $ 3.87 $ 2.86 There were 30 thousand, 35 thousand and 54 thousand anti-dilutive stock awards for the years ended December 31, 2021, 2020 and 2019, respectively.

Credit Agreement

Credit Agreement	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Credit Agreement	Credit agreement On May 28, 2019, the Company entered into a Credit Agreement (the “Credit Agreement”) that provided the Company with a $50.0 million senior unsecured revolving credit facility (the “Credit Facility”) and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30.0 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund construction of the Company’s new headquarters and may also be used for working capital and general corporate purposes. Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan. At December 31, 2021, there was $42.7 million outstanding under the Credit Facility, net of debt issuance cost of $0.3 million, with a weighted average interest rate of 1.92%. For the years ended December 31, 2021, 2020 and 2019, total interest expense under the Credit Facility was $1.0 million, $1.0 million and $0.2 million, respectively. For the years ended December 31, 2020 and 2019, $0.8 million and $0.2 million of interest expense was capitalized as part of the real estate project under construction, respectively. Interest paid was $0.9 million, $0.8 million and $0.1 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Contingencies	ContingenciesContingencies arise in the normal conduct of the Company’s operations and are not expected to have a material effect on the Company’s financial condition or results of operations. However, adverse outcomes are possible and could negatively affect the Company’s financial condition and results of operations.

Employee benefit plan

Employee benefit plan	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Employee benefit plan	Employee benefit planThe Company has established a defined contribution employee retirement plan ("Plan") in accordance with Section 401(k) of the Internal Revenue Code. Expenses related to the Plan were $2.2 million, $1.7 million and $1.3 million in 2021, 2020 and 2019, respectively.

Other comprehensive income (los

Other comprehensive income (loss)	12 Months Ended
	Dec. 31, 2021
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss)	Other comprehensive (loss) income The following table summarizes the components of other comprehensive (loss) income: Year Ending December 31, 2021 2020 2019 (in thousands) Unrealized (losses) gains on fixed-maturity securities arising during the period, before income taxes: $ (26,792) $ 37,387 $ 19,190 Income tax benefit (expense) 5,626 (7,851) (4,029) Unrealized (losses) gains arising during the period, net of income taxes (21,166) 29,536 15,161 Less reclassification adjustment: Net realized investment gains on available-for-sale investments 2,644 2,119 489 Income tax benefit (555) (445) (102) Reclassification adjustment included in net income 2,089 1,674 387 Other comprehensive (loss) income $ (23,255) $ 27,862 $ 14,774 The sale of an available-for-sale security results in amounts being reclassified from accumulated other comprehensive income to realized gains or losses in current period earnings. The related tax effect of the reclassification adjustment is recorded in income tax expense in current period earnings. See Note 2 for additional information.

Underwriting information

Underwriting information	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Underwriting information	Underwriting informationThe Company has one reportable segment, the Excess and Surplus Lines Insurance segment, which primarily offers commercial excess and surplus lines liability and property insurance products through its underwriting divisions. Gross written premiums by underwriting division are presented below: Year Ended December 31, 2021 2020 2019 (in thousands) Commercial: Small Business $ 112,142 $ 83,289 $ 63,181 Excess Casualty 109,464 76,715 51,225 Construction 103,540 87,206 71,035 Commercial Property 78,722 51,789 29,115 Allied Health 59,208 37,562 23,962 Products Liability 55,070 38,306 26,333 Life Sciences 41,297 31,027 17,821 General Casualty 36,042 24,591 20,931 Professional Liability 33,226 27,051 20,029 Management Liability 32,163 24,061 14,820 Energy 19,925 16,985 15,371 Environmental 13,584 8,568 5,179 Entertainment 12,396 4,614 2,348 Health Care 11,271 7,666 5,963 Inland Marine 9,703 6,910 3,467 Public Entity 9,207 3,007 580 Commercial Insurance 411 1,757 1,674 Total commercial 737,371 531,104 373,034 Personal: Personal Insurance 27,002 21,710 16,660 Total $ 764,373 $ 552,814 $ 389,694 Small Business underwrites commercial general liability on smaller risks with an emphasis on artisan contractors and premises related exposures. Excess Casualty underwrites excess liability over risks that would fit within the general casualty, construction, products liability and small business divisions. Coverage is written over the Company's primary liability policies as well as those of other insurers. This division also writes excess liability over primary commercial auto liability policies written by other carriers. Construction underwrites commercial general liability coverage on contractors focusing on new residential construction, residential remodeling and renovation and commercial construction. Commercial Property underwrites first-party coverage on manufacturing facilities, government and municipal buildings, professional buildings, offices and general commercial properties, vacant properties, as well as entertainment and retail facilities. Allied Health underwrites commercial general liability, professional liability and excess liability on allied health and social service risks including assisted living facilities, home health care agencies and outpatient medical facilities. Products Liability underwrites commercial general liability on manufacturers, distributors and importers of a wide array of consumer, commercial and industrial products. Life Sciences underwrites general liability, products liability and professional liability coverage for manufacturers, distributors and developers of dietary supplements, medical devices, pharmaceuticals, biologics, health and beauty products, durable medical equipment and clinical trials. General Casualty underwrites general liability and liquor liability on hospitality, habitational and retail risks, among others, with similar premises liability loss exposures. During 2021, certain business previously underwritten by this division is now underwritten by the Entertainment division and prior year amounts have been reclassified to conform to the current year's presentation. Professional Liability underwrites small-to-medium sized non-medical professional liability risks. The classes of risks include accountants, architects and engineers, financial planners, insurance agents, lawyers, realtors, and certain other professions. Management Liability underwrites directors and officers liability, employment practices liability and fiduciary liability coverage on a variety of commercial and government risks. Energy underwrites commercial general liability, pollution liability, professional liability and excess liability on enterprises engaged in the business of energy production or distribution or mining including drillers, lease operators, contractors, product manufacturers and alternative energy. Environmental underwrites commercial general liability, pollution liability and professional liability on a wide range of commercial risks where environmental exposures exist that are operational in nature or related to the premises. Entertainment underwrites commercial general liability for small-to-medium sized entertainment classes, including such classes as bowling alleys, campgrounds, escape rooms, fitness centers, museums and paintball facilities, among others. As previously discussed, during 2021, certain business previously underwritten by the General Casualty division is now underwritten by this division and prior year amounts have been reclassified to conform to the current year's presentation. Health Care underwrites medical professional liability for physicians, surgeons, dentists, chiropractors and podiatrists. Policies cover both individuals and small practice groups. Inland Marine underwrites a variety of inland marine coverages including builders risk, contractors' equipment, transportation risks and mobile equipment. Public Entity underwrites law enforcement professional liability and school board liability. Commercial Insurance underwrites commercial general liability on small accounts, through the Company's wholly-owned broker, Aspera. Personal Insurance writes homeowners coverage on manufactured homes with catastrophe exposure due to coastal location. The Company does business with two unaffiliated insurance brokers that generated $137.0 million and $118.8 million of gross written premiums for the year ended December 31, 2021, representing 17.9% and 15.5% of gross written premiums, respectively. No other broker generated 10.0% or more of the gross written premiums for the year ended December 31, 2021.

Statutory financial information

Statutory financial information	12 Months Ended
	Dec. 31, 2021
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract]
Statutory financial information	Statutory financial information Kinsale Insurance maintains its accounts in conformity with accounting practices prescribed or permitted by state regulatory authorities that vary in certain respects from U.S. GAAP. In converting from statutory accounting principles to U.S. GAAP, typical adjustments include deferral of policy acquisition costs, the inclusion of statutory non-admitted assets and the inclusion of net unrealized gains or losses relating to fixed maturities in stockholders’ equity. The Company does not use any permitted practices that are different from prescribed statutory accounting practices. Statutory net income and statutory capital and surplus for Kinsale Insurance as of December 31, 2021, 2020, and 2019 and for the years then ended are summarized as follows: Year ended December 31, 2021 2020 2019 (in thousands) Statutory net income $ 115,885 $ 54,338 $ 40,917 Statutory capital and surplus $ 606,910 $ 476,066 $ 348,811 Kinsale Insurance is subject to risk-based capital ("RBC") requirements. RBC is a method developed by the National Association of Insurance Commissioners ("NAIC") to determine the minimum amount of statutory capital appropriate for an insurance company to support its overall business operations in consideration of its size and risk profile. The formula for determining the amount of RBC is calculated using various factors, weighted based on the perceived degree of risk, which are applied to certain financial balances and financial activity. The adequacy of a company’s actual capital is evaluated by a comparison to the RBC results, as determined by the formula. Companies that do not maintain statutory capital and surplus at a level in excess of the company action level RBC are required to take specified actions. At December 31, 2021 and 2020, actual statutory capital and surplus for Kinsale Insurance substantially exceeded the regulatory requirements. Dividend payments to Kinsale from Kinsale Insurance are restricted by state insurance laws as to the amount that may be paid without prior approval of the regulatory authorities of Arkansas. The maximum dividend distribution is limited by Arkansas law to the greater of 10% of policyholder surplus as of December 31 of the previous year or statutory net income, not including realized capital gains, for the previous calendar year. Dividend payments are further limited to that part of available policyholder surplus which is derived from net profits on its business. The maximum dividend distribution that can be paid by Kinsale Insurance during 2022 without prior approval is $114.0 million.

SEC Schedule, Article 12-15, Su

SEC Schedule, Article 12-15, Summary of Investments - Other than Investments in Related Parties	12 Months Ended
	Dec. 31, 2021
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties	Schedule I KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES Summary of Investments—Other than Investments in Related Parties Type of Investment Cost or Amortized Cost Fair Value Amount at which shown on Balance Sheet (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,936 $ 6,847 $ 6,847 Obligations of states, municipalities and political subdivisions 216,375 228,045 228,045 Corporate and other securities 450,594 458,487 458,487 Asset-backed securities 299,810 301,775 301,775 Residential mortgage-backed securities 340,804 337,685 337,685 Commercial mortgage-backed securities 57,000 59,227 59,227 Total fixed maturities 1,371,519 1,392,066 1,392,066 Equity securities: Exchange traded funds 70,151 123,389 123,389 Non-redeemable preferred stock 48,744 49,222 49,222 Total equity securities 118,895 172,611 172,611 Total investments $ 1,490,414 $ 1,564,677 $ 1,564,677

Schedule II - Condensed Financi

Schedule II - Condensed Financial Information of Registrant	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Parent Company Only Disclosure	Schedule II KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES Condensed Financial Information of Registrant Balance Sheets (Parent Company Only) December 31, 2021 2020 (in thousands) Assets Cash and cash equivalents $ 14,596 $ 8,395 Due from subsidiaries — 7,792 Investment in subsidiaries 721,369 600,931 Deferred income tax asset, net 934 587 Income taxes recoverable 5,059 1,177 Other assets 314 290 Total assets $ 742,272 $ 619,172 Liabilities and Stockholders' Equity Liabilities: Accounts payable and accrued expenses $ 121 $ 302 Due to subsidiaries 47 — Credit facility 42,696 42,570 Other liabilities 73 62 Total liabilities 42,937 42,934 Stockholders’ equity: Common stock 228 228 Additional paid-in capital 295,040 291,315 Retained earnings 385,942 243,315 Accumulated other comprehensive income 18,125 41,380 Stockholders’ equity 699,335 576,238 Total liabilities and stockholders’ equity $ 742,272 $ 619,172 See accompanying notes to condensed financial information. See accompanying Report of Independent Registered Public Accounting Firm. Schedule II KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES Condensed Financial Information of Registrant Statements of Income and Comprehensive Income (Parent Company Only) Years Ended December 31, 2021 2020 2019 (in thousands) Revenues: Management fees from subsidiaries $ 7,002 $ 5,709 $ 4,502 Total revenues 7,002 5,709 4,502 Expenses: Operating expenses 7,972 6,624 5,215 Other expenses 994 1,332 — Total expenses 8,966 7,956 5,215 Loss before income taxes (1,964) (2,247) (713) Income tax benefit (3,424) (8,779) (2,714) Income before equity in net income of subsidiaries 1,460 6,532 2,001 Equity in net income of subsidiaries 151,199 81,887 61,315 Net income 152,659 88,419 63,316 Other comprehensive (loss) income: Equity in other comprehensive (losses) earnings of subsidiaries (23,255) 27,862 14,774 Total comprehensive income $ 129,404 $ 116,281 $ 78,090 See accompanying notes to condensed financial information. See accompanying Report of Independent Registered Public Accounting Firm. Schedule II KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES Condensed Financial Information of Registrant Statements of Cash Flows (Parent Company Only) Years Ended December 31, 2021 2020 2019 (in thousands) Operating activities Net income $ 152,659 $ 88,419 $ 63,316 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Deferred tax benefit (347) (68) (150) Stock compensation expense 4,844 3,575 2,742 Equity in undistributed earnings of subsidiaries (151,199) (81,887) (61,315) Changes in operating assets and liabilities 3,955 7,520 (14,247) Dividends received from subsidiary 8,000 — 5,000 Net cash provided by (used in) operating activities 17,912 17,559 (4,654) Investing activities Contributions to subsidiary (571) (100,034) (68,391) Net cash used in investing activities (571) (100,034) (68,391) Financing activities Common stock issued, net of transaction costs — 56,698 65,879 Common stock issued, stock options exercised 982 3,622 2,750 Payroll taxes withheld and remitted on share-based payments (2,101) (1,803) (617) Dividends paid (10,021) (8,073) (6,929) Proceeds from credit facility — 25,700 17,300 Debt issuance costs — — (628) Net cash (used in) provided by financing activities (11,140) 76,144 77,755 Net change in cash and cash equivalents 6,201 (6,331) 4,710 Cash and cash equivalents at beginning of year 8,395 14,726 10,016 Cash and cash equivalents at end of year $ 14,596 $ 8,395 $ 14,726 See accompanying notes to condensed financial information. See accompanying Report of Independent Registered Public Accounting Firm. KINSALE CAPITAL GROUP, INC. Condensed Financial Information of Registrant Notes to Condensed Financial Information (Parent Company Only) 1. Accounting policies Organization Kinsale Capital Group, Inc. (the "Company"), a Delaware domiciled insurance holding company, was formed on June 3, 2009 for the purpose of acquiring and managing insurance entities. Basis of presentation The accompanying condensed financial statements have been prepared using the equity method. Under the equity method, the investment in consolidated subsidiaries is stated at cost plus equity in undistributed earnings of consolidated subsidiaries since the date of acquisition. These condensed financial statements should be read in conjunction with the Company’s consolidated financial statements. Estimates and assumptions Preparation of the condensed financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed financial statements and accompanying disclosures. Those estimates are inherently subject to change, and actual results may ultimately differ from those estimates. Credit agreement On May 28, 2019, the Company entered into a Credit Agreement (the “Credit Agreement”) that provided the Company with a $50.0 million senior unsecured revolving credit facility (the “Credit Facility”) and an uncommitted accordion feature that permits the Company to increase the commitments by an additional $30.0 million. The Credit Facility has a maturity of May 28, 2024. Borrowings under the Credit Facility were used to fund construction of the Company’s new headquarters and may also be used for working capital and general corporate purposes. Loans under the Credit Facility may be subject to varying rates of interest depending on whether the loan is a Eurodollar loan or an alternate base rate (ABR) loan, at the Company's election. Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan. At December 31, 2021, there was $42.7 million outstanding under the Credit Facility, net of debt issuance cost of $0.3 million, with a weighted average interest rate of 1.92%. For the years ended December 31, 2021, 2020 and 2019, total interest expense under the Credit Facility was $1.0 million, $1.0 million and $0.2 million, respectively. For the years ended December 31, 2020 and 2019, $0.8 million and $0.2 million of interest expense was capitalized as part of the real estate project under construction, respectively. Interest paid was $0.9 million, $0.8 million and $0.1 million for the years ended December 31, 2021, 2020 and 2019, respectively. The Credit Agreement also contains representations and warranties and affirmative and negative covenants customary for financings of this type, as well as customary events of default. As of December 31, 2021, the Company was in compliance with all of its financial covenants under the Credit Facility. Dividends from subsidiary Cash dividends paid to Kinsale Capital Group, Inc. by its wholly-owned subsidiary, Kinsale Insurance Company, were $8.0 million for the year ended December 31, 2021 and $5.0 million for the year ended December 31, 2019. There were no cash dividends paid by the insurance subsidiary for the year ended December 31, 2020.

Schedule V - Valuation and Qual

Schedule V - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule V - Valuation and Qualifying Accounts	Schedule V KINSALE CAPITAL GROUP, INC. AND SUBSIDIARIES Valuation and Qualifying Accounts Additions Deductions (in thousands) Balance at Beginning of Period (1) Amounts Amounts Balance Year Ended December 31, 2021: Allowance for premiums receivable $ 3,087 $ 2,189 $ 1,885 $ 3,391 Valuation allowance for deferred tax assets 3,491 668 — 4,159 Allowance for reinsurance recoverables 282 118 — 400 Year Ended December 31, 2020: Allowance for premiums receivable 2,345 1,240 498 3,087 Valuation allowance for deferred tax assets 1,592 1,899 — 3,491 Allowance for reinsurance recoverables 282 — — 282 Year Ended December 31, 2019: Allowance for premiums receivable 2,615 835 745 2,705 Valuation allowance for deferred tax assets 780 812 — 1,592 See accompanying Report of Independent Registered Public Accounting Firm.

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Principles of consolidation	Principles of consolidation The accompanying consolidated financial statements include the accounts of Kinsale Capital Group, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year's presentation.
Use of estimates	Use of estimatesThe preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, if any, at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management periodically reviews its estimates and assumptions. These reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses, allowance for credit losses and uncollectible reinsurance, fair value of investments, as well as evaluating the investment portfolio for credit impairments.
Cash and cash equivalents	Cash and cash equivalents The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents.
Short-term investments	Short-term investments Short-term investments are carried at cost, which approximates fair value. Short-term investments have maturities greater than three months but less than one year at the date of purchase. There were no short-term investments at December 31, 2021 or December 31, 2020.
Fixed maturity and equity securities	Fixed-maturity and equity securities Fixed-maturity securities are classified as available-for-sale and reported at fair value. Unrealized gains and losses on these securities are excluded from earnings but are recorded as a separate component of other comprehensive income and stockholders' equity, net of deferred income taxes. Equity securities are reported at fair value. Changes in unrealized gains and losses in fair value of these investments are recognized in net income. The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the fair value is deemed to be a credit loss. See Note 2 for further discussion regarding the determination of credit losses. Interest on fixed-maturity securities is credited to earnings as it accrues. Premiums and discounts are amortized or accreted using the effective interest method over the lives of the related fixed maturities, or to the earliest call date for securities purchased at a premium. This method includes an adjustment for estimated principal prepayments, if any, on asset- and mortgage-backed securities. To the extent that the estimated lives of such securities change as a result of changes in estimated prepayment rates, the adjustments are included in net investment income using the retrospective method. Dividends on equity securities are included in earnings on the ex-dividend date. Realized gains and losses on disposition of investments are based on specific identification of the investments sold on the trade date.
Reinsurance	Reinsurance Reinsurance premiums, commissions, and ceded unearned premiums on reinsured business are accounted for on a basis consistent with that used in accounting for the original policies issued and the terms of the reinsurance contracts. The Company receives ceding commissions in accordance with certain reinsurance treaties. The ceding commissions are capitalized and amortized as a reduction of underwriting, acquisition and insurance expenses. Reinsurance recoverables represent paid losses and loss adjustment expenses and reserves for unpaid losses and loss adjustment expenses ceded to reinsurers that are subject to reimbursement under reinsurance treaties. The method for determining reinsurance recoverables for unpaid losses and loss adjustment expenses involves reviewing actuarial estimates of gross unpaid losses and loss adjustment expenses to determine the Company's ability to cede unpaid losses and loss adjustment expenses under the Company's existing reinsurance contracts. This method is continually reviewed and updated and any resulting adjustments are reflected in earnings in the period identified. See Note 8 for a further discussion of the Company's reinsurance program.
Premiums receivable, net	Premiums receivable, net Premiums receivable balances are carried at face value, net of any allowance for credit losses. The allowance for credit losses represents an estimate of amounts considered uncollectible based on the Company’s assessment of the collectability of receivables that are past due. The Company recorded an allowance for credit losses of $3.4 million and $3.1 million at December 31, 2021 and 2020, respectively, and believes that all other amounts due are collectible.
Deferred policy acquisition costs, net of ceding commissions	Deferred policy acquisition costs, net of ceding commissions The Company defers commissions, net of ceding commissions, and certain other costs that are directly related to the successful acquisition of insurance contracts. All eligible costs are capitalized and charged to expense in proportion to premium earned over the estimated policy life. To the extent that unearned premiums on existing policies are not adequate to cover the related costs and expenses, referred to as a premium deficiency, deferred policy acquisition costs are charged to earnings. The Company considers anticipated investment income in determining whether a premium deficiency exists.
Property and equipment, net	Property and equipment, net Property and equipment are stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives range from 39 years for the building and parking deck, 15 to 20 years for land improvements, 7 to 10 years for furniture and equipment, and 3 to 7 years for electronic data processing hardware and software. Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following: December 31, 2021 2020 (in thousands) Building $ 33,101 $ 31,675 Parking deck 5,072 5,072 Land 3,068 3,068 Equipment 3,143 2,770 Software 7,849 4,815 Furniture and fixtures 2,158 1,731 Land improvements 474 317 54,865 49,448 Accumulated depreciation (5,570) (3,262) Total property and equipment, net $ 49,295 $ 46,186
Intangible assets	Intangible assets Intangible assets are recorded at fair value at the date of acquisition. The Company's intangible assets are comprised solely of indefinite-lived intangible assets, which arose from regulatory approvals granted by the various state insurance departments to write insurance business in the respective states on a non-admitted basis. In accordance with U.S. GAAP, amortization of indefinite-lived intangible assets is not permitted. Indefinite-lived intangible assets are tested for impairment during the fourth quarter on an annual basis, or earlier if there is reason to suspect that their values may have been diminished or impaired. There were no impairments recognized in 2021, 2020, or 2019. In addition, as of December 31, 2021, no triggering events occurred that suggested an updated review was necessary.
Reserves for unpaid losses and loss adjustment expenses	Reserves for unpaid losses and loss adjustment expensesReserves for unpaid losses and loss adjustment expenses represent management's best estimate of ultimate unpaid cost of all reported and unreported losses and loss adjustment expenses incurred prior to the financial statement date. The estimates are based on an actuarial method that uses management’s initial expected loss ratios, expected reporting patterns for losses based on industry data and the Company’s actual reported losses and loss adjustment expenses. All estimates are regularly reviewed and, as experience develops and new information becomes known, the reserves for unpaid losses and loss adjustment expenses are adjusted as necessary. Such adjustments are reflected in the results of operations in the period in which they are determined. Although management believes that the reserves for losses and loss adjustment expenses are reasonable, due to the inherent uncertainty in estimating reserves for unpaid losses and loss adjustment expenses, it is possible that the Company’s actual incurred losses and loss adjustment expenses will not develop in a manner consistent with the assumptions inherent in the determination of these reserves. If actual liabilities exceed recorded amounts, there will be an increase to the Company’s reserves resulting in a reduction in net income and stockholders’ equity in the period in which the deficiency is identified. Furthermore, management may determine that recorded reserves are more than adequate to cover expected losses which will result in a reduction to the reserves. The Company believes that the reserves for unpaid losses and loss adjustment expenses at December 31, 2021 and 2020 are adequate and represent a reasonable estimate of the Company's future obligations. See Note 7 for a further discussion of reserves for unpaid losses and loss adjustment expenses.
Revenue recognition	Revenue recognition Premiums are recognized as revenue ratably over the term of the insurance contracts, net of ceded reinsurance. Unearned premiums are calculated on a daily pro rata basis.
Income taxes	Income taxes Deferred income tax assets and liabilities are determined based on the differences between the recorded amounts and the tax bases of assets and liabilities, using enacted tax rates expected to be in effect during the year in which the basis differences reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period in which such change was enacted. Valuation allowances on deferred tax assets are estimated based on the Company's assessment of the realizability of such amounts. Valuation allowances are recorded when it is more likely than not that some portion, or all, of the deferred tax assets will not be realizable. The Company provides for uncertain tax positions, and the related interest and penalties, based upon management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax authorities. To the extent that the anticipated tax outcome of these uncertain tax positions changes, such changes in estimate will impact the income tax provision in the period in which such determination is made. The Company recognizes accrued interest and penalties related to uncertain tax positions as a component of income tax expense. The Company uses the portfolio approach to release stranded tax effects in accumulated other comprehensive income ("AOCI") related to its available-for-sale fixed-maturity securities. Under this approach, stranded tax effects remaining in AOCI are released only when the entire portfolio of the available-for-sale fixed-maturity securities are liquidated, sold or extinguished.
Commitments and contingencies	Commitments and contingencies Liabilities for loss contingencies, arising from noninsurance policy claims, assessments, litigation, fines, and penalties and other sources, are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.
Fair value of financial instruments	Fair value of financial instruments Fair value is estimated for each class of financial instrument based on the framework established in the fair value accounting guidance. This guidance requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value hierarchy disclosures are based on the quality of inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). See Note 3 for further details regarding fair value disclosures.
Stock-based compensation	Stock-based compensation Stock-based compensation is expensed based upon the estimated fair value of employee stock awards. Compensation cost for awards of equity instruments to employees is measured based on the grant-date fair value of those awards and compensation expense is recognized over the service period that the awards vest. Forfeitures of stock-based compensation awards are recognized as they occur. See Note 9 for further discussion and related disclosures regarding stock-based compensation.
Recently adopted accounting pronouncements	Recently adopted accounting pronouncements Accounting Standards Update ("ASU") 2016-13, Financial Instruments – Credit Losses (Topic 326) On June 16, 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. The update requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected by means of an allowance for credit losses that runs through net income. Credit losses relating to available-for-sale fixed- maturity securities must also be recorded through an allowance for credit losses, which is limited to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under previous U.S. GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. The FASB has issued additional ASUs on Topic 326 that do not change the core principle of the guidance in ASU 2016-13 but clarify certain aspects of it. Effective January 1, 2020, the Company adopted this ASU using the modified-retrospective approach and recorded a cumulative effect adjustment to beginning retained earnings. The adoption of this ASU resulted in the recognition of an allowance for credit loss related to the Company’s reinsurance recoverables. However, since the Company enters into contracts with reinsurers that have A.M. Best ratings of “A” (Excellent) or better, the allowance was not material to the Company’s consolidated financial statements. ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes In December 2019, the FASB issued updated guidance for the accounting for income taxes. The updated guidance is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other existing guidance to simplify several income tax accounting matters. Effective January 1, 2021, the Company adopted ASU 2019-12 using a modified-retrospective approach. The adoption of ASU 2019-12 did not have a material impact on the Company's consolidated financial statements.
Prospective accounting pronouncements	Prospective accounting pronouncements There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company's consolidated financial statements.

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Property and equipment are included in "other assets" in the accompanying consolidated balance sheets and consists of the following: December 31, 2021 2020 (in thousands) Building $ 33,101 $ 31,675 Parking deck 5,072 5,072 Land 3,068 3,068 Equipment 3,143 2,770 Software 7,849 4,815 Furniture and fixtures 2,158 1,731 Land improvements 474 317 54,865 49,448 Accumulated depreciation (5,570) (3,262) Total property and equipment, net $ 49,295 $ 46,186

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2021
Investments [Abstract]
Available-for-sale Investments	The following tables summarize the Company’s available-for-sale investments at December 31, 2021 and 2020: December 31, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,936 $ — $ (89) $ 6,847 Obligations of states, municipalities and political subdivisions 216,375 12,139 (469) 228,045 Corporate and other securities 450,594 11,714 (3,821) 458,487 Asset-backed securities 299,810 2,217 (252) 301,775 Residential mortgage-backed securities 340,804 1,804 (4,923) 337,685 Commercial mortgage-backed securities 57,000 2,433 (206) 59,227 Total fixed-maturity investments $ 1,371,519 $ 30,307 $ (9,760) $ 1,392,066 December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) Fixed maturities: Obligations of states, municipalities and political subdivisions $ 216,181 $ 14,792 $ (67) $ 230,906 Corporate and other securities 294,854 21,840 (86) 316,608 Asset-backed securities 236,813 4,230 (382) 240,661 Residential mortgage-backed securities 217,859 4,938 (141) 222,656 Commercial mortgage-backed securities 66,110 4,886 (27) 70,969 Total fixed-maturity investments $ 1,031,817 $ 50,686 $ (703) $ 1,081,800
Available-for-sale Securities in a Unrealized Loss Position	December 31, 2021 Less than 12 Months 12 Months or Longer Total Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,847 $ (89) $ — $ — $ 6,847 $ (89) Obligations of states, municipalities and political subdivisions 23,870 (469) — — 23,870 (469) Corporate and other securities 188,522 (3,718) 1,092 (103) 189,614 (3,821) Asset-backed securities 136,669 (204) 4,452 (48) 141,121 (252) Residential mortgage-backed securities 260,251 (4,329) 17,968 (594) 278,219 (4,923) Commercial mortgage-backed securities 10,773 (206) — — 10,773 (206) Total fixed-maturity investments $ 626,932 $ (9,015) $ 23,512 $ (745) $ 650,444 $ (9,760) December 31, 2020 Less than 12 Months 12 Months or Longer Total Estimated Fair Value Gross Unrealized Holding Losses Estimated Fair Value Gross Unrealized Holding Losses Estimated Fair Value Gross Unrealized Holding Losses (in thousands) Fixed maturities: Obligations of states, municipalities and political subdivisions $ 6,412 $ (67) $ — $ — $ 6,412 $ (67) Corporate and other securities 3,829 (86) — — 3,829 (86) Asset-backed securities 57,750 (149) 23,825 (233) 81,575 (382) Residential mortgage-backed securities 46,869 (129) 266 (12) 47,135 (141) Commercial mortgage-backed securities 4,971 (27) — — 4,971 (27) Total fixed-maturity investments $ 119,831 $ (458) $ 24,091 $ (245) $ 143,922 $ (703)
Contractual Maturities of Available-for-sale Fixed Maturity Securities	The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at December 31, 2021 are summarized, by contractual maturity, as follows: Amortized Estimated Cost Fair Value (in thousands) Due in one year or less $ 6,742 $ 6,822 Due after one year through five years 185,273 189,497 Due after five years through ten years 226,707 232,197 Due after ten years 255,183 264,863 Asset-backed securities 299,810 301,775 Residential mortgage-backed securities 340,804 337,685 Commercial mortgage-backed securities 57,000 59,227 Total fixed maturities $ 1,371,519 $ 1,392,066
Net Investment Income	The following table presents the components of net investment income: Year Ended December 31, 2021 2020 2019 (in thousands) Interest: Taxable bonds $ 25,654 $ 20,493 $ 14,853 Municipal bonds (tax exempt) 3,501 3,618 3,692 Cash equivalents and short-term investments 12 262 842 Dividends on equity securities 3,962 3,512 2,136 Gross investment income 33,129 27,885 21,523 Investment expenses (2,081) (1,775) (1,390) Net investment income $ 31,048 $ 26,110 $ 20,133
Schedule of Realized Gain (Loss)	The following table presents realized investment gains and losses: Year Ended December 31, 2021 2020 2019 (in thousands) Fixed-maturity securities: Realized gains $ 2,944 $ 4,022 $ 567 Realized losses (3) (383) (79) Net realized gains from fixed-maturity securities 2,941 3,639 488 Equity securities: Realized gains 97 — 556 Realized losses (210) (119) (688) Net realized losses from equity securities (113) (119) (132) Short-term securities - realized gains — 13 3 Net realized investment gains $ 2,828 $ 3,533 $ 359

Fair value measurements (Tables

Fair value measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Assets Measured at Fair Value on a Recurring Basis	The following tables present the balances of assets measured at fair value on a recurring basis as of December 31, 2021 and 2020, by level within the fair value hierarchy. December 31, 2021 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 6,847 $ — $ — $ 6,847 Obligations of states, municipalities and political subdivisions — 228,045 — 228,045 Corporate and other securities — 458,487 — 458,487 Asset-backed securities — 301,775 — 301,775 Residential mortgage-backed securities — 337,685 — 337,685 Commercial mortgage-backed securities — 59,227 — 59,227 Total fixed maturities 6,847 1,385,219 — 1,392,066 Equity securities: Exchange traded funds 123,389 — — 123,389 Non-redeemable preferred stock — 49,222 — 49,222 Total equity securities 123,389 49,222 — 172,611 Total $ 130,236 $ 1,434,441 $ — $ 1,564,677 December 31, 2020 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: Obligations of states, municipalities and political subdivisions $ — $ 230,906 $ — $ 230,906 Corporate and other securities — 316,608 — 316,608 Asset-backed securities — 240,661 — 240,661 Residential mortgage-backed securities — 222,656 — 222,656 Commercial mortgage-backed securities — 70,969 — 70,969 Total fixed maturities — 1,081,800 — 1,081,800 Equity securities: Exchange traded funds 98,050 — — 98,050 Non-redeemable preferred stock — 31,612 — 31,612 Total equity securities 98,050 31,612 — 129,662 Total $ 98,050 $ 1,113,412 $ — $ 1,211,462

Deferred policy acquisition c_2

Deferred policy acquisition costs (Tables)	12 Months Ended
	Dec. 31, 2021
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred Policy Acquisition Costs	The following table presents the amounts of policy acquisition costs deferred and amortized for the years ended: Year Ended December 31, 2021 2020 2019 (in thousands) Balance, beginning of year $ 31,912 $ 23,564 $ 14,801 Policy acquisition costs deferred: Direct commissions 111,463 80,682 56,841 Ceding commissions (28,965) (18,879) (12,373) Other underwriting and policy acquisition costs 6,191 4,478 3,727 Policy acquisition costs deferred 88,689 66,281 48,195 Amortization of net policy acquisition costs (78,633) (57,933) (39,432) Balance, end of year $ 41,968 $ 31,912 $ 23,564

Underwriting, acquisition and_2

Underwriting, acquisition and insurance expenses (Tables)	12 Months Ended
	Dec. 31, 2021
Underwriting, Acquisition and Insurance Expenses [Abstract]
Underwriting, Acquisition and Insurance Expenses	Underwriting, acquisition and insurance expenses consist of the following: Year Ended December 31, 2021 2020 2019 (in thousands) Underwriting, acquisition and insurance expenses incurred: Direct commissions $ 98,847 $ 69,922 $ 48,382 Ceding commissions (25,702) (16,145) (12,347) Other operating expenses 51,755 40,519 34,182 Total $ 124,900 $ 94,296 $ 70,217

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Components of Income Tax Expense (Benefit)	Income tax expense includes the following components for the years ending December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 (in thousands) Current federal income tax expense $ 36,718 $ 11,378 $ 12,860 Deferred federal income tax (benefit) expense (576) 616 (125) Income tax expense $ 36,142 $ 11,994 $ 12,735
Effective Income Tax Rate Reconciliation	The Company’s effective income tax rate on income before income taxes differs from the prevailing federal income tax rate and is summarized as follows: Year ended December 31, 2021 2020 2019 (in thousands) Income tax expense at federal income tax rate $ 39,648 $ 21,087 $ 15,971 Stock options exercised (2,148) (7,634) (2,411) Restricted stock award vesting (677) (658) (153) Tax-exempt investment income (546) (565) (577) Other (135) (236) (95) Total $ 36,142 $ 11,994 $ 12,735
Deferred Tax Assets and Liabilities	The significant components of the net deferred tax asset (liability) are summarized as follows: December 31, 2021 2020 (in thousands) Deferred tax assets: Unpaid losses and loss adjustment expenses $ 15,723 $ 11,736 Unearned premiums 13,190 9,942 State operating loss carryforwards 4,554 3,833 Stock compensation 1,140 865 Allowance for credit losses 712 649 Other 278 254 Deferred tax assets before allowance 35,597 27,279 Less: valuation allowance (4,159) (3,491) Total deferred tax assets 31,438 23,788 Deferred tax liabilities: Unrealized gains on fixed-maturity securities 4,315 10,497 Unrealized gains on equity securities 11,368 6,552 Deferred policy acquisition costs, net of ceding commissions 8,813 6,701 Property and equipment 2,741 2,433 Transition adjustment for loss reserve discount 1,025 1,281 Intangible assets 743 743 Other 324 229 Total deferred tax liabilities 29,329 28,436 Net deferred tax asset (liability) $ 2,109 $ (4,648)

Reserves for unpaid losses an_2

Reserves for unpaid losses and loss adjustment expenses (Tables)	12 Months Ended
	Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Abstract]
Unpaid Losses and Loss Adjustment Expenses	The following table presents a reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses: December 31, 2021 2020 2019 (in thousands) Gross reserves for unpaid losses and loss adjustment expenses, beginning of year $ 636,013 $ 460,058 $ 369,152 Less: reinsurance recoverable on unpaid losses 83,730 69,792 55,389 Adoption of new accounting standard for credit losses — (282) — Net reserves for unpaid losses and loss adjustment expenses, beginning of year 552,283 390,548 313,763 Incurred losses and loss adjustment expenses: Current year 356,401 277,140 178,986 Prior year (31,986) (13,338) (9,423) Total net losses and loss adjustment expenses incurred 324,415 263,802 169,563 Payments: Current year 23,765 27,664 19,054 Prior year 89,150 74,403 74,006 Total payments 112,915 102,067 93,060 Net reserves for unpaid losses and loss adjustment expenses, end of year 763,783 552,283 390,266 Reinsurance recoverable on unpaid losses, net of allowance 117,561 83,730 69,792 Gross reserves for unpaid losses and loss adjustment expenses, end of year $ 881,344 $ 636,013 $ 460,058
Claims Development
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability	The reconciliation of the net incurred and paid claims development tables to the liability for unpaid claims and claim adjustment expenses in the consolidated statement of financial position is as follows: (in thousands) December 31, 2021 Net outstanding liabilities Property $ 31,502 Casualty - claims made 150,699 Casualty - occurrence 514,178 Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance 696,379 Reinsurance recoverable on unpaid claims Property 16,777 Casualty - claims made 16,581 Casualty - occurrence 84,203 Total reinsurance recoverable on unpaid claims 117,561 Unallocated claims adjustment expenses 67,404 Gross liability for unpaid claims and claim adjustment expense $ 881,344
Property [Member]
Claims Development
Short-duration Insurance Contracts, Claims Development	Property Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, As of December 31, 2021 Accident Year 2017 2018 2019 2020 2021 Total of IBNR Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims ($ in thousands) 2017 $ 12,473 $ 11,705 $ 11,676 $ 11,631 $ 11,606 $ — 1,041 2018 11,559 12,004 12,698 12,704 26 650 2019 14,914 13,909 15,572 154 642 2020 40,612 37,939 1,234 2,294 2021 36,531 9,323 1,034 Total $ 114,352 Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, Accident Year 2017 2018 2019 2020 2021 ($ in thousands) 2017 $ 9,938 $ 11,233 $ 11,602 $ 11,608 $ 11,605 2018 9,132 11,646 12,599 12,660 2019 9,852 12,581 13,996 2020 19,897 30,321 2021 14,268 Total 82,850 All outstanding liabilities before 2017, net of reinsurance — Liabilities for claims and claim adjustment expenses, net of reinsurance $ 31,502
Short-duration Insurance Contracts, Schedule of Historical Claims Duration	The following is supplementary information about average historical claims duration as of December 31, 2021: Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) Years 1 2 3 4 5 Property 62.5 % 19.0 % 6.6 % 0.3 % — %
Casualty - claims made [Member]
Claims Development
Short-duration Insurance Contracts, Claims Development	Casualty - Claims Made Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, As of December 31, 2021 Accident Year 2012 2013 2014 Unaudited 2015 2016 2017 2018 2019 Unaudited 2020 Unaudited 2021 Total of IBNR Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims 2012 $ 7,913 $ 5,749 $ 4,205 $ 3,102 $ 2,845 $ 2,477 $ 2,314 $ 2,207 $ 2,136 $ 1,867 $ 136 138 2013 15,238 11,639 9,113 7,917 7,002 6,463 6,128 6,087 6,215 356 228 2014 18,847 14,289 11,748 11,217 10,948 10,988 10,620 10,266 638 273 2015 18,883 16,777 14,896 13,583 13,942 13,548 13,414 937 258 2016 19,170 14,693 14,675 14,322 13,583 13,602 1,431 310 2017 18,116 17,097 16,120 15,794 14,989 2,434 371 2018 22,429 20,234 18,612 17,057 5,108 464 2019 34,693 29,056 26,426 11,037 550 2020 55,630 44,641 31,667 772 2021 84,018 74,017 1,035 Total $ 232,495 Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, Accident Year 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2012 $ 153 $ 475 $ 877 $ 1,024 $ 1,090 $ 1,882 $ 1,946 $ 1,946 $ 1,946 $ 1,732 2013 499 1,915 4,436 5,070 5,320 5,439 5,482 5,612 5,843 2014 435 1,865 5,039 6,385 8,290 9,415 9,491 9,628 2015 217 4,496 7,563 9,238 11,372 11,522 12,142 2016 1,158 3,015 6,907 9,839 11,381 12,105 2017 340 4,897 8,252 10,484 11,357 2018 507 5,030 8,931 10,330 2019 2,487 6,005 10,123 2020 1,002 7,446 2021 1,146 Total 81,852 All outstanding liabilities before 2012, net of reinsurance 56 Liabilities for claims and claim adjustment expenses, net of reinsurance $ 150,699
Casualty - occurrence [Member]
Claims Development
Short-duration Insurance Contracts, Claims Development	Casualty - Occurrence Incurred Claims and Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, As of December 31, 2021 Accident Year 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Total of IBNR Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims 2012 $ 16,977 $ 17,436 $ 18,803 $ 20,401 $ 20,579 $ 22,001 $ 22,401 $ 23,223 $ 23,197 $ 22,271 $ 997 597 2013 30,616 28,771 28,037 29,039 31,731 33,248 33,973 33,128 33,002 2,273 872 2014 47,805 40,668 38,049 36,678 39,313 41,859 42,434 41,367 4,374 1,230 2015 59,717 51,739 49,122 52,100 54,697 54,090 54,090 7,108 1,700 2016 61,440 55,680 53,549 55,534 57,401 60,861 10,378 1,518 2017 71,126 67,151 68,985 70,641 71,117 18,282 1,843 2018 86,157 78,331 78,386 83,952 33,875 1,918 2019 112,266 109,994 108,138 63,673 2,006 2020 154,619 136,212 119,143 1,761 2021 200,598 190,069 1,332 Total $ 811,608 Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance For the Years Ended December 31, Accident Year 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2012 $ 757 $ 4,441 $ 7,850 $ 11,238 $ 14,382 $ 16,474 $ 19,383 $ 20,707 $ 21,408 $ 20,805 2013 1,099 4,469 7,957 14,890 21,348 26,715 28,248 29,610 30,116 2014 698 3,081 8,489 17,576 23,771 31,026 34,338 35,807 2015 941 3,161 12,685 28,385 37,690 41,724 44,161 2016 1,099 6,015 17,225 28,924 34,437 43,311 2017 1,581 9,352 22,407 37,736 46,025 2018 2,638 10,995 22,860 35,138 2019 3,944 16,687 30,518 2020 2,400 8,673 2021 3,205 Total 297,759 All outstanding liabilities before 2012, net of reinsurance 329 Liabilities for claims and claim adjustment expenses, net of reinsurance $ 514,178
Casualty [Member]
Claims Development
Short-duration Insurance Contracts, Schedule of Historical Claims Duration	The following is supplementary information about average historical claims duration as of December 31, 2021: Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) Years 1 2 3 4 5 6 7 8 9 10 Casualty - claims made 4.9 % 20.5 % 25.7 % 12.6 % 9.9 % 12.3 % 2.4 % 1.1 % 1.9 % — % Casualty - occurrence 2.4 % 9.1 % 15.0 % 20.4 % 14.4 % 13.0 % 7.6 % 4.5 % 2.3 % — %

Reinsurance (Tables)

Reinsurance (Tables)	12 Months Ended
	Dec. 31, 2021
Reinsurance Disclosures [Abstract]
Effects of Reinsurance on Premiums Written and Earned	The following table summarizes the effect of reinsurance on premiums written and earned: Year Ended December 31, 2021 2020 2019 (in thousands) Written: Direct $ 764,373 $ 552,814 $ 389,569 Assumed — — 125 Ceded (104,164) (74,595) (47,633) Net written $ 660,209 $ 478,219 $ 342,061 Earned: Direct $ 677,630 $ 479,181 $ 330,464 Assumed — 21 104 Ceded (94,751) (66,448) (47,587) Net earned $ 582,879 $ 412,754 $ 282,981
Reinsurance Recoverables	The following table presents reinsurance recoverables on paid and unpaid losses as of December 31, 2021 and 2020: December 31, 2021 December 31, 2020 (in thousands) Reinsurance recoverables on paid losses $ 5,409 $ 9,485 Reinsurance recoverables on unpaid losses 117,561 83,730 Reinsurance recoverables $ 122,970 $ 93,215

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Stockholders' Equity Attributable to Parent [Abstract]
Assumptions Used in Estimating Fair Value of Options Granted	The value of the options granted was estimated at the date of grant using the Black-Scholes pricing model using the following assumptions: Risk-free rate of return 1.26 % Dividend yield 1.25 % Expected share price volatility (1) 18.50 % Expected life in years (2) 6.3 years
Share-based Compensation, Stock Options, Activity	A summary of option activity as of December 31, 2021 and changes during the year then ended is presented below: Number of Shares Weighted-average exercise price Weighted-average remaining years of contractual life Aggregate intrinsic value (in thousands) Outstanding at December 31, 2020 387,738 $ 16.00 Granted — — Forfeited (934) 16.00 Exercised (61,371) 16.00 Outstanding at December 31, 2021 325,433 $ 16.00 4.6 $ 72,210 Exercisable at December 31, 2021 325,433 $ 16.00 4.6 $ 72,210
Nonvested Restricted Stock Shares Activity	A summary of restricted stock activity under the equity compensation plans for the year ended is as follows: December 31, 2021 Number of Shares Weighted Average Grant Date Fair Value per Share Nonvested outstanding at the beginning of the period 108,392 $ 97.40 Granted 35,870 $ 185.00 Vested (41,121) $ 87.82 Forfeited (7,157) $ 128.11 Nonvested outstanding at the end of the period 95,984 $ 131.94

Earnings per share (Tables)

Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	The following table represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements: Year ended December 31, 2021 2020 2019 (in thousands, except per share data) Net income $ 152,659 $ 88,419 $ 63,316 Weighted average common shares outstanding - basic 22,693 22,319 21,528 Dilutive effect of shares issued under stock compensation arrangements: Stock options 324 469 570 Restricted stock awards 45 64 38 Total dilutive effect of shares issued under stock compensation arrangements 369 533 608 Weighted average common shares outstanding - diluted 23,062 22,852 22,136 Earnings per common share: Basic $ 6.73 $ 3.96 $ 2.94 Diluted $ 6.62 $ 3.87 $ 2.86

Other comprehensive income (l_2

Other comprehensive income (loss) (Tables)	12 Months Ended
	Dec. 31, 2021
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss)	The following table summarizes the components of other comprehensive (loss) income: Year Ending December 31, 2021 2020 2019 (in thousands) Unrealized (losses) gains on fixed-maturity securities arising during the period, before income taxes: $ (26,792) $ 37,387 $ 19,190 Income tax benefit (expense) 5,626 (7,851) (4,029) Unrealized (losses) gains arising during the period, net of income taxes (21,166) 29,536 15,161 Less reclassification adjustment: Net realized investment gains on available-for-sale investments 2,644 2,119 489 Income tax benefit (555) (445) (102) Reclassification adjustment included in net income 2,089 1,674 387 Other comprehensive (loss) income $ (23,255) $ 27,862 $ 14,774

Underwriting information (Table

Underwriting information (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Gross Written Premiums by Underwriting Division	Gross written premiums by underwriting division are presented below: Year Ended December 31, 2021 2020 2019 (in thousands) Commercial: Small Business $ 112,142 $ 83,289 $ 63,181 Excess Casualty 109,464 76,715 51,225 Construction 103,540 87,206 71,035 Commercial Property 78,722 51,789 29,115 Allied Health 59,208 37,562 23,962 Products Liability 55,070 38,306 26,333 Life Sciences 41,297 31,027 17,821 General Casualty 36,042 24,591 20,931 Professional Liability 33,226 27,051 20,029 Management Liability 32,163 24,061 14,820 Energy 19,925 16,985 15,371 Environmental 13,584 8,568 5,179 Entertainment 12,396 4,614 2,348 Health Care 11,271 7,666 5,963 Inland Marine 9,703 6,910 3,467 Public Entity 9,207 3,007 580 Commercial Insurance 411 1,757 1,674 Total commercial 737,371 531,104 373,034 Personal: Personal Insurance 27,002 21,710 16,660 Total $ 764,373 $ 552,814 $ 389,694

Statutory financial informati_2

Statutory financial information (Tables)	12 Months Ended
	Dec. 31, 2021
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract]
Statutory Net Income and Statutory Capital and Surplus	Statutory net income and statutory capital and surplus for Kinsale Insurance as of December 31, 2021, 2020, and 2019 and for the years then ended are summarized as follows: Year ended December 31, 2021 2020 2019 (in thousands) Statutory net income $ 115,885 $ 54,338 $ 40,917 Statutory capital and surplus $ 606,910 $ 476,066 $ 348,811

Schedule II - Condensed Finan_2

Schedule II - Condensed Financial Information of Registrant (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	December 31, 2021 2020 (in thousands) Assets Cash and cash equivalents $ 14,596 $ 8,395 Due from subsidiaries — 7,792 Investment in subsidiaries 721,369 600,931 Deferred income tax asset, net 934 587 Income taxes recoverable 5,059 1,177 Other assets 314 290 Total assets $ 742,272 $ 619,172 Liabilities and Stockholders' Equity Liabilities: Accounts payable and accrued expenses $ 121 $ 302 Due to subsidiaries 47 — Credit facility 42,696 42,570 Other liabilities 73 62 Total liabilities 42,937 42,934 Stockholders’ equity: Common stock 228 228 Additional paid-in capital 295,040 291,315 Retained earnings 385,942 243,315 Accumulated other comprehensive income 18,125 41,380 Stockholders’ equity 699,335 576,238 Total liabilities and stockholders’ equity $ 742,272 $ 619,172
Condensed Income Statement	Years Ended December 31, 2021 2020 2019 (in thousands) Revenues: Management fees from subsidiaries $ 7,002 $ 5,709 $ 4,502 Total revenues 7,002 5,709 4,502 Expenses: Operating expenses 7,972 6,624 5,215 Other expenses 994 1,332 — Total expenses 8,966 7,956 5,215 Loss before income taxes (1,964) (2,247) (713) Income tax benefit (3,424) (8,779) (2,714) Income before equity in net income of subsidiaries 1,460 6,532 2,001 Equity in net income of subsidiaries 151,199 81,887 61,315 Net income 152,659 88,419 63,316 Other comprehensive (loss) income: Equity in other comprehensive (losses) earnings of subsidiaries (23,255) 27,862 14,774 Total comprehensive income $ 129,404 $ 116,281 $ 78,090
Condensed Cash Flow Statement	Years Ended December 31, 2021 2020 2019 (in thousands) Operating activities Net income $ 152,659 $ 88,419 $ 63,316 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Deferred tax benefit (347) (68) (150) Stock compensation expense 4,844 3,575 2,742 Equity in undistributed earnings of subsidiaries (151,199) (81,887) (61,315) Changes in operating assets and liabilities 3,955 7,520 (14,247) Dividends received from subsidiary 8,000 — 5,000 Net cash provided by (used in) operating activities 17,912 17,559 (4,654) Investing activities Contributions to subsidiary (571) (100,034) (68,391) Net cash used in investing activities (571) (100,034) (68,391) Financing activities Common stock issued, net of transaction costs — 56,698 65,879 Common stock issued, stock options exercised 982 3,622 2,750 Payroll taxes withheld and remitted on share-based payments (2,101) (1,803) (617) Dividends paid (10,021) (8,073) (6,929) Proceeds from credit facility — 25,700 17,300 Debt issuance costs — — (628) Net cash (used in) provided by financing activities (11,140) 76,144 77,755 Net change in cash and cash equivalents 6,201 (6,331) 4,710 Cash and cash equivalents at beginning of year 8,395 14,726 10,016 Cash and cash equivalents at end of year $ 14,596 $ 8,395 $ 14,726

Description of business - (Deta

Description of business - (Details)	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of states in which company is authorized to write business	50

Summary of significant accoun_3

Summary of significant accounting policies (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Allowance for credit losses	$ 3,400	$ 3,100
Short-term Investments	$ 0	$ 0

Intangible assets and other inf

Intangible assets and other information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Excess and surplus lines insurance authorization [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 0	$ 0	$ 0

Summary of significant accoun_4

Summary of significant accounting policies Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 54,865	$ 49,448
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(5,570)	(3,262)
Property, Plant and Equipment, Net	49,295	46,186
Transaction price of sale of land and parking deck	6,500
Proceeds received from sale of land and parking deck	5,000
Proceeds receivable from sale of land and parking deck	1,500
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 33,101	31,675
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Parking [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 5,072	5,072
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,068	3,068
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,143	2,770
Software Development [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	7,849	4,815
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,158	1,731
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 474	$ 317
Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Technology Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Technology Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years

Investments, Available-for-sale

Investments, Available-for-sale Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,371,519	$ 1,031,817
Gross Unrealized Gains	30,307	50,686
Gross Unrealized Losses	9,760	703
Estimated Fair Value	1,392,066	1,081,800
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,936
Gross Unrealized Gains	0
Gross Unrealized Losses	89
Estimated Fair Value	6,847
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	216,375	216,181
Gross Unrealized Gains	12,139	14,792
Gross Unrealized Losses	469	67
Estimated Fair Value	228,045	230,906
Corporate and other securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	450,594	294,854
Gross Unrealized Gains	11,714	21,840
Gross Unrealized Losses	3,821	86
Estimated Fair Value	458,487	316,608
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	299,810	236,813
Gross Unrealized Gains	2,217	4,230
Gross Unrealized Losses	252	382
Estimated Fair Value	301,775	240,661
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	340,804	217,859
Gross Unrealized Gains	1,804	4,938
Gross Unrealized Losses	4,923	141
Estimated Fair Value	337,685	222,656
Commercial mortgage-backed aecurities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	57,000	66,110
Gross Unrealized Gains	2,433	4,886
Gross Unrealized Losses	206	27
Estimated Fair Value	$ 59,227	$ 70,969

Investments, Available-for-sa_2

Investments, Available-for-sale Securities in a Loss Position (Details) $ in Thousands	Dec. 31, 2021USD ($)Rate	Dec. 31, 2020USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	$ 626,932	$ 119,831
Less than 12 months, Gross Unrealized Losses	9,015	458
12 Months or Longer, Estimated Fair Value	23,512	24,091
12 Months or Longer, Gross Unrealized Losses	745	245
Total Estimated Fair Value	650,444	143,922
Total gross unrealized losses	$ 9,760	703
Number of available-for-sale securities in unrealized loss positions	234
Number of available-for-sale securities in unrealized loss positions, greater than one year	10
Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Percentage of securities rated A- or better | Rate	81.50%
Credit losses	$ 0
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	6,847
Less than 12 months, Gross Unrealized Losses	89
12 Months or Longer, Estimated Fair Value	0
12 Months or Longer, Gross Unrealized Losses	0
Total Estimated Fair Value	6,847
Total gross unrealized losses	89
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	23,870	6,412
Less than 12 months, Gross Unrealized Losses	469	67
12 Months or Longer, Estimated Fair Value	0	0
12 Months or Longer, Gross Unrealized Losses	0	0
Total Estimated Fair Value	23,870	6,412
Total gross unrealized losses	469	67
Corporate and other securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	188,522	3,829
Less than 12 months, Gross Unrealized Losses	3,718	86
12 Months or Longer, Estimated Fair Value	1,092	0
12 Months or Longer, Gross Unrealized Losses	103	0
Total Estimated Fair Value	189,614	3,829
Total gross unrealized losses	3,821	86
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	136,669	57,750
Less than 12 months, Gross Unrealized Losses	204	149
12 Months or Longer, Estimated Fair Value	4,452	23,825
12 Months or Longer, Gross Unrealized Losses	48	233
Total Estimated Fair Value	141,121	81,575
Total gross unrealized losses	252	382
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	260,251	46,869
Less than 12 months, Gross Unrealized Losses	4,329	129
12 Months or Longer, Estimated Fair Value	17,968	266
12 Months or Longer, Gross Unrealized Losses	594	12
Total Estimated Fair Value	278,219	47,135
Total gross unrealized losses	4,923	141
Commercial mortgage-backed aecurities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	10,773	4,971
Less than 12 months, Gross Unrealized Losses	206	27
12 Months or Longer, Estimated Fair Value	0	0
12 Months or Longer, Gross Unrealized Losses	0	0
Total Estimated Fair Value	10,773	4,971
Total gross unrealized losses	$ 206	$ 27

Investments, Contractual Maturi

Investments, Contractual Maturities of Available-for-sale Fixed Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Amortized Cost [Abstract]
Due in one year or less, Amortized Cost	$ 6,742
Due after one year through five years, Amortized Cost	185,273
Due after five years through ten years, Amortized Cost	226,707
Due after ten years, Amortized Cost	255,183
Total fixed maturities, Amortized Cost	1,371,519	$ 1,031,817
Estimated Fair Value [Abstract]
Due in one year or less, Estimated Fair Value	6,822
Due after one year through five years, Estimated Fair Value	189,497
Due after five years through ten years, Estimated Fair Value	232,197
Due after ten years, Estimated Fair Value	264,863
Estimated Fair Value	1,392,066	1,081,800
Asset-backed securities [Member]
Amortized Cost [Abstract]
Without single maturity date, Amortized Cost	299,810
Total fixed maturities, Amortized Cost	299,810	236,813
Estimated Fair Value [Abstract]
Without single maturity date, Estimated Fair Value	301,775
Estimated Fair Value	301,775	240,661
Residential mortgage-backed securities [Member]
Amortized Cost [Abstract]
Without single maturity date, Amortized Cost	340,804
Total fixed maturities, Amortized Cost	340,804	217,859
Estimated Fair Value [Abstract]
Without single maturity date, Estimated Fair Value	337,685
Estimated Fair Value	337,685	222,656
Commercial mortgage-backed aecurities [Member]
Amortized Cost [Abstract]
Without single maturity date, Amortized Cost	57,000
Total fixed maturities, Amortized Cost	57,000	66,110
Estimated Fair Value [Abstract]
Without single maturity date, Estimated Fair Value	59,227
Estimated Fair Value	$ 59,227	$ 70,969

Investments, Net Investment Inc

Investments, Net Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest [Abstract]
Taxable bonds	$ 25,654	$ 20,493	$ 14,853
Municipal bonds (tax exempt)	3,501	3,618	3,692
Cash equivalents and short-term investments	12	262	842
Dividends on equity securities	3,962	3,512	2,136
Gross investment income	33,129	27,885	21,523
Investment expenses	(2,081)	(1,775)	(1,390)
Net investment income	$ 31,048	$ 26,110	$ 20,133

Investments Realized Investment

Investments Realized Investment Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fixed-maturity securities - realized gains (losses) [Abstract]
Realized gains	$ 2,944	$ 4,022	$ 567
Realized losses	(3)	(383)	(79)
Net realized gains from fixed-maturity securities	2,941	3,639	488
Equity securities - realized gains (losses) [Abstract]
Realized gains	97	0	556
Realized losses	(210)	(119)	(688)
Net realized gains (losses) from equity securities	(113)	(119)	(132)
Short-term securities - realized gain	0	13	3
Net realized investment gains	$ 2,828	$ 3,533	$ 359

Investments, Unrealized Gain (L

Investments, Unrealized Gain (Losses) on Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Change in unrealized gains (losses), fixed-maturity securities	$ (29.4)	$ 35.3	$ 18.7

Investments Investment Deposits

Investments Investment Deposits and Payables (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Payable for investments purchased	$ 15
Invested assets on deposit with state regulatory authorities	$ 6.7	$ 6.9

Fair value measurements (Detail

Fair value measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	$ 1,392,066	$ 1,081,800
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	6,847
Obligations of states, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	228,045	230,906
Corporate and other securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	458,487	316,608
Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	301,775	240,661
Residential mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	337,685	222,656
Commercial mortgage-backed aecurities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	59,227	70,969
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,564,677	1,211,462
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	130,236	98,050
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,434,441	1,113,412
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring [Member] | Fixed Maturities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	1,392,066	1,081,800
Recurring [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	6,847	0
Recurring [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	1,385,219	1,081,800
Recurring [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	6,847
Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	6,847
Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	228,045	230,906
Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	228,045	230,906
Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Corporate and other securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	458,487	316,608
Recurring [Member] | Corporate and other securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Corporate and other securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	458,487	316,608
Recurring [Member] | Corporate and other securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	301,775	240,661
Recurring [Member] | Asset-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Asset-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	301,775	240,661
Recurring [Member] | Asset-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Residential mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	337,685	222,656
Recurring [Member] | Residential mortgage-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Residential mortgage-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	337,685	222,656
Recurring [Member] | Residential mortgage-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Commercial mortgage-backed aecurities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	59,227	70,969
Recurring [Member] | Commercial mortgage-backed aecurities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Commercial mortgage-backed aecurities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	59,227	70,969
Recurring [Member] | Commercial mortgage-backed aecurities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	172,611	129,662
Recurring [Member] | Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	123,389	98,050
Recurring [Member] | Equity Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	49,222	31,612
Recurring [Member] | Equity Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring [Member] | Exchange Traded Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	123,389	98,050
Recurring [Member] | Exchange Traded Fund [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	123,389	98,050
Recurring [Member] | Exchange Traded Fund [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring [Member] | Exchange Traded Fund [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring [Member] | Nonredeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	49,222	31,612
Recurring [Member] | Nonredeemable Preferred Stock [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring [Member] | Nonredeemable Preferred Stock [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	49,222	31,612
Recurring [Member] | Nonredeemable Preferred Stock [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 0

Fair value measurements 2 (Deta

Fair value measurements 2 (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, Fair Value Disclosure	$ 44,700,000	$ 13,700,000
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	0	0
Liabilities measured at fair value on a nonrecurring basis	$ 0	$ 0

Deferred policy acquisition c_3

Deferred policy acquisition costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Movement analysis of deferred policy acquisition costs [Roll Forward]
Balance, beginning of period	$ 31,912	$ 23,564	$ 14,801
Policy acquisition costs deferred:
Direct commissions deferred	111,463	80,682	56,841
Ceding commissions deferred	(28,965)	(18,879)	(12,373)
Other underwriting and policy acquisition costs deferred	6,191	4,478	3,727
Policy acquisition costs deferred	88,689	66,281	48,195
Amortization of net policy acquisition costs	(78,633)	(57,933)	(39,432)
Balance, end of period	$ 41,968	$ 31,912	$ 23,564

Underwriting, acquisition and_3

Underwriting, acquisition and insurance expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Underwriting, Acquisition and Insurance Expenses [Abstract]
Direct commissions	$ 98,847	$ 69,922	$ 48,382
Ceding commissions	(25,702)	(16,145)	(12,347)
Other expenses	51,755	40,519	34,182
Total	124,900	94,296	70,217
Salaries, employee benefits and bonus expense	$ 48,900	$ 35,900	$ 27,800

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of income tax expense
Current federal income tax expense	$ 36,718	$ 11,378	$ 12,860
Deferred federal income tax benefit	(576)	616	(125)
Income tax expense	36,142	11,994	12,735
Federal income taxes paid	40,600	13,000	$ 11,600
Income taxes receivable	$ 5,100	$ 1,200
Statutory income tax rate, percent	21.00%	21.00%	21.00%
Effective income tax rate reconciliation, amount [Abstract]
Income tax expense at federal income tax	$ 39,648	$ 21,087	$ 15,971
Stock options exercised	(2,148)	(7,634)	2,411
Restricted stock award vesting	(677)	(658)	(153)
Tax-exempt investment income	(546)	(565)	(577)
Other	(135)	(236)	(95)
Income tax expense	36,142	11,994	$ 12,735
Unrecognized tax positions	$ 0	$ 0

Income taxes - Deferred Tax Ass

Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets [Abstract]
Unpaid losses and loss adjustment expenses	$ 15,723	$ 11,736
Unearned premiums	13,190	9,942
State operating loss carryforwards	4,554	3,833
Stock compensation	1,140	865
Allowance for credit losses	712	649
Other	278	254
Deferred tax assets before allowance	35,597	27,279
Less: valuation allowance	(4,159)	(3,491)
Total deferred tax assets	31,438	23,788
Deferred tax liabilities [Abstract]
Unrealized gains on fixed-maturity securities	4,315	10,497
Unrealized gains on equity securities	11,368	6,552
Deferred policy acquisition costs, net of ceding commissions	8,813	6,701
Property and equipment	2,741	2,433
Transition adjustment for loss discounting	1,025	1,281
Intangible assets	743	743
Other	324	229
Total deferred tax liabilities	29,329	28,436
Deferred income tax asset, net	2,109
Net deferred tax liabilities		(4,648)
State Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 96,100	$ 80,900

Reserves for unpaid losses an_3

Reserves for unpaid losses and loss adjustment expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses [Roll Forward]
Gross reserves for unpaid losses and loss adjustment expenses, beginning of year	$ 881,344	$ 636,013	$ 460,058	$ 369,152
Adoption of new accounting standard for credit losses, allowance for reinsurance recoverables	300	300
Net reserves for unpaid losses and loss adjustment expenses, beginning of period	552,283	390,266	313,763
Incurred losses and loss adjustment expenses [Abstract]
Current year	356,401	277,140	178,986
Prior year losses and loss adjustment expense	(31,986)	(13,338)	(9,423)
Total net losses and loss adjustment expenses incurred	324,415	263,802	169,563
Payments [Abstract]
Current year	23,765	27,664	19,054
Prior years	89,150	74,403	74,006
Total payments	112,915	102,067	93,060
Net reserves for unpaid losses and loss adjustment expenses, end of period	763,783	552,283	390,266
Reinsurance recoverable for unpaid Claims losses, net, ending balance	117,561	83,730	69,792
Gross reserves for unpaid losses and loss adjustment expenses, end of year	$ 881,344	636,013	460,058
Cumulative Effect, Period of Adoption, Adjustment
Reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses [Roll Forward]
Adoption of new accounting standard for credit losses, allowance for reinsurance recoverables		282
Cumulative Effect, Period of Adoption, Adjusted Balance
Reconciliation of consolidated beginning and ending reserves for unpaid losses and loss adjustment expenses [Roll Forward]
Net reserves for unpaid losses and loss adjustment expenses, beginning of period		$ 390,548
Payments [Abstract]
Net reserves for unpaid losses and loss adjustment expenses, end of period			$ 390,548

Reserves for unpaid losses an_4

Reserves for unpaid losses and loss adjustment expenses Liability for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense	$ (31,986)	$ (13,338)	$ (9,423)
Current year	356,401	277,140	178,986
Catastrophe [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Current year	8,600	23,200
Accident Year 2020 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense	(33,700)
Accident Year 2019 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense	$ (3,800)	(10,500)
Accident Year 2018 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense		$ (1,800)	(13,000)
Accident Year 2017 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense			(1,600)
Accident Years 2011 to 2015 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior year losses and loss adjustment expense			$ 5,200

Reserves for unpaid losses an_5

Reserves for unpaid losses and loss adjustment expenses Reserve Development (Details)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2012USD ($)
Claims Development
Liability for claims and claim adjustment expense, net	$ 696,379,000
Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	82,850,000
All outstanding liabilities not separately presented, net of reinsurance	0
Liability for claims and claim adjustment expense, net	31,502,000
Incurred claims and claim adjustment expense, net	114,352,000
Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	81,852,000
All outstanding liabilities not separately presented, net of reinsurance	56,000
Liability for claims and claim adjustment expense, net	150,699,000
Incurred claims and claim adjustment expense, net	232,495,000
Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	297,759,000
All outstanding liabilities not separately presented, net of reinsurance	329,000
Liability for claims and claim adjustment expense, net	514,178,000
Incurred claims and claim adjustment expense, net	811,608,000
Accident Year 2012 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	1,732,000	$ 1,946,000	$ 1,946,000	$ 1,946,000	$ 1,882,000	$ 1,090,000	$ 1,024,000	$ 877,000	$ 475,000	$ 153,000
Incurred claims and claim adjustment expense, net	1,867,000	2,136,000	2,207,000	2,314,000	2,477,000	2,845,000	3,102,000	4,205,000	5,749,000	7,913,000
Total of IBNR liabilities plus expected development on reported claims	$ 136,000
Cumulative number of reported claims	138
Accident Year 2012 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 20,805,000	21,408,000	20,707,000	19,383,000	16,474,000	14,382,000	11,238,000	7,850,000	4,441,000	757,000
Incurred claims and claim adjustment expense, net	22,271,000	23,197,000	23,223,000	22,401,000	22,001,000	20,579,000	20,401,000	18,803,000	17,436,000	$ 16,977,000
Total of IBNR liabilities plus expected development on reported claims	$ 997,000
Cumulative number of reported claims	597
Accident Year 2013 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 5,843,000	5,612,000	5,482,000	5,439,000	5,320,000	5,070,000	4,436,000	1,915,000	499,000
Incurred claims and claim adjustment expense, net	6,215,000	6,087,000	6,128,000	6,463,000	7,002,000	7,917,000	9,113,000	11,639,000	15,238,000
Total of IBNR liabilities plus expected development on reported claims	$ 356,000
Cumulative number of reported claims	228
Accident Year 2013 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 30,116,000	29,610,000	28,248,000	26,715,000	21,348,000	14,890,000	7,957,000	4,469,000	1,099,000
Incurred claims and claim adjustment expense, net	33,002,000	33,128,000	33,973,000	33,248,000	31,731,000	29,039,000	28,037,000	28,771,000	$ 30,616,000
Total of IBNR liabilities plus expected development on reported claims	$ 2,273,000
Cumulative number of reported claims	872
Accident Year 2014 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 9,628,000	9,491,000	9,415,000	8,290,000	6,385,000	5,039,000	1,865,000	435,000
Incurred claims and claim adjustment expense, net	10,266,000	10,620,000	10,988,000	10,948,000	11,217,000	11,748,000	14,289,000	18,847,000
Total of IBNR liabilities plus expected development on reported claims	$ 638,000
Cumulative number of reported claims	273
Accident Year 2014 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 35,807,000	34,338,000	31,026,000	23,771,000	17,576,000	8,489,000	3,081,000	698,000
Incurred claims and claim adjustment expense, net	41,367,000	42,434,000	41,859,000	39,313,000	36,678,000	38,049,000	40,668,000	$ 47,805,000
Total of IBNR liabilities plus expected development on reported claims	$ 4,374,000
Cumulative number of reported claims	1,230
Accident Year 2015 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 12,142,000	11,522,000	11,372,000	9,238,000	7,563,000	4,496,000	217,000
Incurred claims and claim adjustment expense, net	13,414,000	13,548,000	13,942,000	13,583,000	14,896,000	16,777,000	18,883,000
Total of IBNR liabilities plus expected development on reported claims	$ 937,000
Cumulative number of reported claims	258
Accident Year 2015 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 44,161,000	41,724,000	37,690,000	28,385,000	12,685,000	3,161,000	941,000
Incurred claims and claim adjustment expense, net	54,090,000	54,090,000	54,697,000	52,100,000	49,122,000	51,739,000	$ 59,717,000
Total of IBNR liabilities plus expected development on reported claims	$ 7,108,000
Cumulative number of reported claims	1,700
Accident Year 2016 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 12,105,000	11,381,000	9,839,000	6,907,000	3,015,000	1,158,000
Incurred claims and claim adjustment expense, net	13,602,000	13,583,000	14,322,000	14,675,000	14,693,000	19,170,000
Total of IBNR liabilities plus expected development on reported claims	$ 1,431,000
Cumulative number of reported claims	310
Accident Year 2016 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 43,311,000	34,437,000	28,924,000	17,225,000	6,015,000	1,099,000
Incurred claims and claim adjustment expense, net	60,861,000	57,401,000	55,534,000	53,549,000	55,680,000	$ 61,440,000
Total of IBNR liabilities plus expected development on reported claims	$ 10,378,000
Cumulative number of reported claims	1,518
Accident Year 2017 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 11,605,000	11,608,000	11,602,000	11,233,000	9,938,000
Incurred claims and claim adjustment expense, net	11,606,000	11,631,000	11,676,000	11,705,000	12,473,000
Total of IBNR liabilities plus expected development on reported claims	$ 0
Cumulative number of reported claims	1,041
Accident Year 2017 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 11,357,000	10,484,000	8,252,000	4,897,000	340,000
Incurred claims and claim adjustment expense, net	14,989,000	15,794,000	16,120,000	17,097,000	18,116,000
Total of IBNR liabilities plus expected development on reported claims	$ 2,434,000
Cumulative number of reported claims	371
Accident Year 2017 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 46,025,000	37,736,000	22,407,000	9,352,000	1,581,000
Incurred claims and claim adjustment expense, net	71,117,000	70,641,000	68,985,000	67,151,000	$ 71,126,000
Total of IBNR liabilities plus expected development on reported claims	$ 18,282,000
Cumulative number of reported claims	1,843
Accident Year 2018 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 12,660,000	12,599,000	11,646,000	9,132,000
Incurred claims and claim adjustment expense, net	12,704,000	12,698,000	12,004,000	11,559,000
Total of IBNR liabilities plus expected development on reported claims	$ 26,000
Cumulative number of reported claims	650
Accident Year 2018 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 10,330,000	8,931,000	5,030,000	507,000
Incurred claims and claim adjustment expense, net	17,057,000	18,612,000	20,234,000	22,429,000
Total of IBNR liabilities plus expected development on reported claims	$ 5,108,000
Cumulative number of reported claims	464
Accident Year 2018 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 35,138,000	22,860,000	10,995,000	2,638,000
Incurred claims and claim adjustment expense, net	83,952,000	78,386,000	78,331,000	$ 86,157,000
Total of IBNR liabilities plus expected development on reported claims	$ 33,875,000
Cumulative number of reported claims	1,918
Accident Year 2019 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 13,996,000	12,581,000	9,852,000
Incurred claims and claim adjustment expense, net	15,572,000	13,909,000	14,914,000
Total of IBNR liabilities plus expected development on reported claims	$ 154,000
Cumulative number of reported claims	642
Accident Year 2019 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 10,123,000	6,005,000	2,487,000
Incurred claims and claim adjustment expense, net	26,426,000	29,056,000	34,693,000
Total of IBNR liabilities plus expected development on reported claims	$ 11,037,000
Cumulative number of reported claims	550
Accident Year 2019 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 30,518,000	16,687,000	3,944,000
Incurred claims and claim adjustment expense, net	108,138,000	109,994,000	$ 112,266,000
Total of IBNR liabilities plus expected development on reported claims	$ 63,673,000
Cumulative number of reported claims	2,006
Accident Year 2020 [Member] | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 30,321,000	19,897,000
Incurred claims and claim adjustment expense, net	37,939,000	40,612,000
Total of IBNR liabilities plus expected development on reported claims	$ 1,234,000
Cumulative number of reported claims	2,294
Accident Year 2020 [Member] | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 7,446,000	1,002,000
Incurred claims and claim adjustment expense, net	44,641,000	55,630,000
Total of IBNR liabilities plus expected development on reported claims	$ 31,667,000
Cumulative number of reported claims	772
Accident Year 2020 [Member] | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 8,673,000	2,400,000
Incurred claims and claim adjustment expense, net	136,212,000	$ 154,619,000
Total of IBNR liabilities plus expected development on reported claims	$ 119,143,000
Cumulative number of reported claims	1,761
Accident Year 2021 | Property [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 14,268,000
Incurred claims and claim adjustment expense, net	36,531,000
Total of IBNR liabilities plus expected development on reported claims	$ 9,323,000
Cumulative number of reported claims	1,034
Accident Year 2021 | Casualty - claims made [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 1,146,000
Incurred claims and claim adjustment expense, net	84,018,000
Total of IBNR liabilities plus expected development on reported claims	$ 74,017,000
Cumulative number of reported claims	1,035
Accident Year 2021 | Casualty - occurrence [Member]
Claims Development
Cumulative paid claims and allocated claim adjustment expense, net	$ 3,205,000
Incurred claims and claim adjustment expense, net	200,598,000
Total of IBNR liabilities plus expected development on reported claims	$ 190,069,000
Cumulative number of reported claims	1,332

Reserves for unpaid losses an_6

Reserves for unpaid losses and loss adjustment expenses Historical Claims Duration (Details)	Dec. 31, 2021Rate
Property [Member]
Historical Claims Duration [Line Items]
Historical Claims Duration, Year One	62.50%
Historical Claims Duration, Year Two	19.00%
Historical Claims Duration, Year Three	6.60%
Historical Claims Duration, Year Four	0.30%
Historical Claims Duration, Year Five	0.00%
Casualty - claims made [Member]
Historical Claims Duration [Line Items]
Historical Claims Duration, Year One	4.90%
Historical Claims Duration, Year Two	20.50%
Historical Claims Duration, Year Three	25.70%
Historical Claims Duration, Year Four	12.60%
Historical Claims Duration, Year Five	9.90%
Historical Claims Duration, Year Six	12.30%
Historical Claims Duration, Year Seven	2.40%
Historical Claims Duration, Year Eight	1.10%
Historical Claims Duration, Year Nine	1.90%
Historical Claims Duration, Year Ten	0.00%
Casualty - occurrence [Member]
Historical Claims Duration [Line Items]
Historical Claims Duration, Year One	2.40%
Historical Claims Duration, Year Two	9.10%
Historical Claims Duration, Year Three	15.00%
Historical Claims Duration, Year Four	20.40%
Historical Claims Duration, Year Five	14.40%
Historical Claims Duration, Year Six	13.00%
Historical Claims Duration, Year Seven	7.60%
Historical Claims Duration, Year Eight	4.50%
Historical Claims Duration, Year Nine	2.30%
Historical Claims Duration, Year Ten	0.00%

Reserves for unpaid losses an_7

Reserves for unpaid losses and loss adjustment expenses Reconciliation of Claims Development to Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	$ 696,379
Reinsurance recoverable for unpaid losses	117,561	$ 83,730	$ 69,792	$ 55,389
Unallocated claim adjustment expenses	67,404
Property [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	31,502
Reinsurance recoverable for unpaid losses	16,777
Casualty - claims made [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	150,699
Reinsurance recoverable for unpaid losses	16,581
Casualty - occurrence [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liability for claims and claim adjustment expense, net	514,178
Reinsurance recoverable for unpaid losses	$ 84,203

Reinsurance, Effects of Reinsur

Reinsurance, Effects of Reinsurance on Premiums Written and Earned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Written [Abstract]
Direct	$ 764,373	$ 552,814	$ 389,569
Assumed	0	0	125
Ceded	(104,164)	(74,595)	(47,633)
Net written premiums	660,209	478,219	342,061
Earned [Abstract]
Direct	677,630	479,181	330,464
Assumed	0	21	104
Ceded	(94,751)	(66,448)	(47,587)
Net earned premiums	582,879	412,754	282,981
Ceded incurred losses and loss adjustment expenses	$ 49,700	$ 42,000	$ 27,200

Reinsurance Reinsurance Balance

Reinsurance Reinsurance Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reinsurance Disclosure [Abstract]
Reinsurance recoverables on paid losses, gross	$ 5,409	$ 9,485
Reinsurance recoverable for unpaid losses	117,561	83,730	$ 69,792	$ 55,389
Reinsurance recoverables	122,970	93,215
Reinsurance Recoverable, Allowance for Credit Loss	400	300	$ 300
Concentration Risk [Line Items]
Reinsurance recoverables	122,970	93,215
Ceded unearned premiums	33,679	$ 24,265
Credit Risk Reinsurer One [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	28,000
Concentration Risk [Line Items]
Reinsurance recoverables	28,000
Ceded unearned premiums	8,400
Credit Risk Reinsurer Two [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	27,400
Concentration Risk [Line Items]
Reinsurance recoverables	27,400
Ceded unearned premiums	5,500
Credit Risk Reinsurer Three [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	16,300
Concentration Risk [Line Items]
Reinsurance recoverables	16,300
Ceded unearned premiums	3,500
Credit Risk Reinsurer Four [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	10,200
Concentration Risk [Line Items]
Reinsurance recoverables	10,200
Ceded unearned premiums	3,300
Credit Risk Reinsurer Five [Member]
Reinsurance Disclosure [Abstract]
Reinsurance recoverables	9,500
Concentration Risk [Line Items]
Reinsurance recoverables	9,500
Ceded unearned premiums	$ 3,300
Prepaid reinsurance premiums ceded to five reinsurers as a percentage of total ceded unearned premium balance [Member] | Major Reinsurers [Member] | Reinsurer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	71.60%
Reinsurance recoverables on paid and unpaid losses from the Company’s five largest reinsurers as percent of total reinsurance recoverables [Member] | Major Reinsurers [Member] | Reinsurer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	74.30%

Stockholders' Equity Capital St

Stockholders' Equity Capital Stock (Details) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares issued	0	0
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01

Stockholders' Equity, Public Of

Stockholders' Equity, Public Offering (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 07, 2020	Aug. 12, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Attributable to Parent [Abstract]
Stock issued, shares	310,500	741,750		311,000	742,000
Share price (in dollars per share)	$ 190	$ 93
Net proceeds from public offering, net of discounts, commissions and other offering costs	$ 56,700	$ 65,900	$ 0	$ 56,698	$ 65,879

Stockholders' Equity, Equity-ba

Stockholders' Equity, Equity-based Compensation, Options (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 27, 2016	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		$ 4,800	$ 3,600	$ 2,700
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Intrinsic value of options exercised		$ 10,400	$ 37,000
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of option granted	10 years
Award vesting period	4 years
Granted (in dollars per share)	$ 2.71
Assumptions used in estimating fair value of options granted [Abstract]
Risk-free rate of return		1.26%
Dividend yield		1.25%
Expected share price volatility		18.50%
Expected life		6 years 3 months 18 days
Options outstanding, number of awards [Roll Forward]
Options, beginning of the year (in shares)		387,738
Granted, shares		0
Forfeited (in shares)		(934)
Exercised (in shares)		(61,371)
Options, end of year (in shares)		325,433	387,738
Exercisable, shares		325,433
Options outstanding, weighted average exercise price [Abstract]
Options beginning of the year (in dollars per share)		$ 16
Granted	$ 16	0
Forfeited		16
Exercised		16
Options end of the year (in dollars per share)		16	$ 16
Exercisable		$ 16
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term		4 years 7 months 6 days
Exercisable, weighted average remaining contractual term		4 years 7 months 6 days
Outstanding, aggregate intrinsic value		$ 72,210
Exercisable, aggregate intrinsic value		$ 72,210
2016 Omnibus Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance	2,073,832
2016 Omnibus Incentive Plan [Member] | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	1,036,916

Stockholders' Equity - Equity-b

Stockholders' Equity - Equity-based Compensation, Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes	13,000	12,000	7,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes	12,958
Vested in period, fair value	$ 6.8	$ 5.8	$ 2.1
Nonvested Restricted Stock, Number of Shares [Roll Forward]
Nonvested outstanding at the beginning of the period, shares		108,392
Granted, shares	35,870
Vested, shares	(41,121)
Forfeited, shares	(7,157)
Nonvested outstanding at the end of the period, shares	95,984
Nonvested Restricted Stock, Weighted Average Grant Date Fair Value [Abstract]
Nonvested outstanding at the beginning of the period	$ 97.40
Granted	185	$ 147.45	$ 80.59
Vested	87.82
Forfeited	128.11
Nonvested outstanding at the end of the period	$ 131.94	$ 97.40
Unrecognized stock-based compensation expense	$ 9.1
Compensation cost not yet recognized, period	2 years 7 months 6 days
Minimum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	1 year
Maximum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	4 years

Stockholders' Equity - Subseque

Stockholders' Equity - Subsequent Event (Details) - $ / shares	Feb. 14, 2022	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Member] | Dividend Declared [Member]
Subsequent Event [Line Items]
Dividend declared date	Feb. 14, 2022
Dividends payable, per share	$ 0.13
Dividend payable date	Mar. 14, 2022
Dividend record date	Mar. 2, 2022
Restricted Stock [Member]
Subsequent Event [Line Items]
Grant date fair value			$ 185	$ 147.45	$ 80.59
Restricted Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Granted		3,528
Grant date fair value		$ 237.89

Earnings per share (Details)

Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of numerator and denominator of the basic and diluted earnings per share computations [Abstract]
Net income	$ 152,659	$ 88,419	$ 63,316
Basic earnings per share [Abstract]
Earnings per share - basic	$ 6.73	$ 3.96	$ 2.94
Diluted earnings per share [Abstract]
Earnings per share - diluted	$ 6.62	$ 3.87	$ 2.86
Basic weighted average shares outstanding [Abstract]
Weighted average shares outstanding - basic	22,693,000	22,319,000	21,528,000
Dilutive effect of shares issued under stock compensation arrangements [Abstract]
Dilutive effect of shares issued under stock compensation arrangements (in shares)	369,000	533,000	608,000
Diluted weighted average shares outstanding [Abstract]
Weighted average shares outstanding - diluted (in shares)	23,062,000	22,852,000	22,136,000
Antidilutive securities (in shares)	30,000	35,000	54,000
Stock options [Member]
Dilutive effect of shares issued under stock compensation arrangements [Abstract]
Dilutive effect of shares issued under stock compensation arrangements (in shares)	324,000	469,000	570,000
Restricted Stock [Member]
Dilutive effect of shares issued under stock compensation arrangements [Abstract]
Dilutive effect of shares issued under stock compensation arrangements (in shares)	45,000	64,000	38,000

Credit Agreement (Details)

Credit Agreement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Current borrowing capacity	$ 50,000
Accordion feature	$ 30,000
Maturity date	May 28, 2024
Interest rate description	Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan.
Credit facility	$ 42,696	$ 42,570
Debt issuance costs	$ 300
Weighted average interest rate	1.92%
Interest expense	$ 1,000	1,000	$ 200
Interest capitalized		800	200
Interest paid	$ 900	$ 800	$ 100

Employee benefit plan (Details)

Employee benefit plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Expenses related to employee benefit plan	$ 2.2	$ 1.7	$ 1.3

Other comprehensive income (l_3

Other comprehensive income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains (losses) arising during the period, before income taxes	$ (26,792)	$ 37,387	$ 19,190
Income taxes	5,626	(7,851)	(4,029)
Unrealized gains (losses) arising during the period, net of income tax	(21,166)	29,536	15,161
Less reclassification adjustment [Abstract]
Net realized investment gains	2,644	2,119	489
Income taxes	(555)	(445)	(102)
Reclassification adjustment included in net income	2,089	1,674	387
Other comprehensive income (loss)	$ (23,255)	$ 27,862	$ 14,774

Underwriting information (Detai

Underwriting information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)Rate	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Revenue from External Customer [Line Items]
Number of operating segments	1
Gross written premiums	$ 764,373	$ 552,814	$ 389,694
Small Business [Member]
Revenue from External Customer [Line Items]
Gross written premiums	112,142	83,289	63,181
Excess Casualty [Member]
Revenue from External Customer [Line Items]
Gross written premiums	109,464	76,715	51,225
Construction [Member]
Revenue from External Customer [Line Items]
Gross written premiums	103,540	87,206	71,035
Commercial Property [Member]
Revenue from External Customer [Line Items]
Gross written premiums	78,722	51,789	29,115
Allied Health [Member]
Revenue from External Customer [Line Items]
Gross written premiums	59,208	37,562	23,962
Products Liability [Member]
Revenue from External Customer [Line Items]
Gross written premiums	55,070	38,306	26,333
Life Sciences [Member]
Revenue from External Customer [Line Items]
Gross written premiums	41,297	31,027	17,821
General Casualty [Member]
Revenue from External Customer [Line Items]
Gross written premiums	36,042	24,591	20,931
Professional Liability [Member]
Revenue from External Customer [Line Items]
Gross written premiums	33,226	27,051	20,029
Management Liability [Member]
Revenue from External Customer [Line Items]
Gross written premiums	32,163	24,061	14,820
Energy [Member]
Revenue from External Customer [Line Items]
Gross written premiums	19,925	16,985	15,371
Environmental [Member]
Revenue from External Customer [Line Items]
Gross written premiums	13,584	8,568	5,179
Entertainment
Revenue from External Customer [Line Items]
Gross written premiums	12,396	4,614	2,348
Health Care [Member]
Revenue from External Customer [Line Items]
Gross written premiums	11,271	7,666	5,963
Inland Marine [Member]
Revenue from External Customer [Line Items]
Gross written premiums	9,703	6,910	3,467
Public Entity [Member]
Revenue from External Customer [Line Items]
Gross written premiums	9,207	3,007	580
Commercial Insurance [Member]
Revenue from External Customer [Line Items]
Gross written premiums	411	1,757	1,674
Commercial [Member]
Revenue from External Customer [Line Items]
Gross written premiums	737,371	531,104	373,034
Personal Insurance [Member]
Revenue from External Customer [Line Items]
Gross written premiums	$ 27,002	$ 21,710	$ 16,660
Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Number of insurance brokers	2
Insurance brokers greater than 10% of gross written premium	0
Major Insurance Brokers, Group One [Member] | Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Gross written premiums
Major Insurance Brokers, Group One [Member] | Revenue Benchmark [Member] | Customer Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage | Rate	17.90%
Major Insurance Brokers, Group Two [Member] | Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Gross written premiums	$ 118,800
Major Insurance Brokers, Group Three [Member] | Revenue Benchmark [Member]
Revenue from External Customer [Line Items]
Gross written premiums	$ 137,000
Major Insurance Brokers, Group Three [Member] | Revenue Benchmark [Member] | Customer Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage | Rate	15.50%

Statutory financial informati_3

Statutory financial information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract]
Statutory net income	$ 115,885	$ 54,338	$ 40,917
Statutory capital and surplus	$ 606,910	$ 476,066	$ 348,811
Percentage of policyholder surplus as of end of prior year used in determining maximum dividend distribution	10.00%
Maximum dividend distribution that can be paid without prior approval	$ 114,000

Schedule I-Summary of Investmen

Schedule I-Summary of Investments-Other than Related Parties (Details) $ in Thousands	Dec. 31, 2021USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	$ 1,490,414
Fair Value	1,564,677
Amount	1,564,677
Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	1,371,519
Fair Value	1,392,066
Amount	1,392,066
US Treasury and Government [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	6,936
Fair Value	6,847
Amount	6,847
US States and Political Subdivisions Debt Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	216,375
Fair Value	228,045
Amount	228,045
Debt Security, Corporate, US [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	450,594
Fair Value	458,487
Amount	458,487
Asset-backed Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	299,810
Fair Value	301,775
Amount	301,775
Residential Mortgage Backed Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	340,804
Fair Value	337,685
Amount	337,685
Commercial mortgage-backed aecurities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	57,000
Fair Value	59,227
Amount	59,227
Equity Securities, Investment Summary [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	118,895
Fair Value	172,611
Amount	172,611
Exchange Traded Funds [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	70,151
Fair Value	123,389
Amount	123,389
Nonredeemable Preferred Stock [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	48,744
Fair Value	49,222
Amount	$ 49,222

Schedule II - Condensed Finan_3

Schedule II - Condensed Financial Information of Registrant, Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 121,040	$ 77,093	$ 100,408	$ 75,089
Deferred income tax asset, net	2,109	0
Income taxes receivable	5,100	1,200
Other assets	57,012	50,133
Total assets	2,025,655	1,546,896
Liabilities:
Accounts payable and accrued expenses	23,250	13,651
Credit facility	42,696	42,570
Other liabilities	15,188	118
Total liabilities	1,326,320	970,658
Stockholders' Equity [Abstract]
Common stock	228	228
Additional paid-in capital	295,040	291,315
Retained earnings	385,942	243,315
Accumulated other comprehensive income	18,125	41,380
Stockholders' equity	699,335	576,238	405,880	263,986
Total liabilities and stockholders' equity	2,025,655	1,546,896
Parent Company [Member]
Assets
Cash and cash equivalents	14,596	8,395	$ 14,726	$ 10,016
Due from subsidiaries	0	7,792
Investment in subsidiaries	721,369	600,931
Deferred income tax asset, net	934	587
Income taxes receivable	5,059	1,177
Other assets	314	290
Total assets	742,272	619,172
Liabilities:
Accounts payable and accrued expenses	121	302
Due to Affiliate	47	0
Credit facility	42,696	42,570
Other liabilities	73	62
Total liabilities	42,937	42,934
Stockholders' Equity [Abstract]
Common stock	228	228
Additional paid-in capital	295,040	291,315
Retained earnings	385,942	243,315
Accumulated other comprehensive income	18,125	41,380
Stockholders' equity	699,335	576,238
Total liabilities and stockholders' equity	$ 742,272	$ 619,172

Schedule II - Condensed Finan_4

Schedule II - Condensed Financial Information of Registrant, Statements of Income and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Revenues	$ 639,779	$ 459,886	$ 315,888
Expenses [Abstract]
Other expenses	1,663	1,375	57
Total expenses	450,978	359,473	239,837
Income tax benefit	36,142	11,994	12,735
Net income	152,659	88,419	63,316
Other Comprehensive Income (Loss) [Abstract]
Comprehensive income	129,404	116,281	78,090
Parent Company [Member]
Revenues:
Revenues	7,002	5,709	4,502
Expenses [Abstract]
Other operating expenses	7,972	6,624	5,215
Other expenses	994	1,332	0
Total expenses	8,966	7,956	5,215
Loss before equity in net income of subsidiaries	(1,964)	(2,247)	(713)
Income tax benefit	(3,424)	(8,779)	(2,714)
Income before equity in net income of subsidiaries	1,460	6,532	2,001
Equity in net income of subsidiaries	151,199	81,887	61,315
Net income	152,659	88,419	63,316
Other Comprehensive Income (Loss) [Abstract]
Equity in other comprehensive earnings (losses) of subsidiaries	(23,255)	27,862	14,774
Comprehensive income	$ 129,404	$ 116,281	$ 78,090

Schedule II - Condensed Finan_5

Schedule II - Condensed Financial Information of Registrant, Statements of Cash Flows (Details) - USD ($)	Aug. 07, 2020	Aug. 12, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income			$ 152,659,000	$ 88,419,000	$ 63,316,000
Adjustments to reconcile net income to net cash used in operating activities:
Deferred tax (benefit) expense			(576,000)	616,000	(125,000)
Stock compensation expense			4,844,000	3,575,000	2,742,000
Dividends received from subsidiary			8,000,000	0	5,000,000
Net cash provided by operating activities			407,042,000	279,974,000	178,357,000
Net Cash Provided by (Used in) Investing Activities [Abstract]
Net cash provided by (used in) investing activities			(351,955,000)	(379,433,000)	(230,793,000)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	$ 56,700,000	$ 65,900,000	0	56,698,000	65,879,000
Common stock issued, stock options exercised			982,000	3,622,000	2,750,000
Payroll taxes withheld and remitted on share-based payments			(2,101,000)	(1,803,000)	(617,000)
Dividends paid			(10,021,000)	(8,073,000)	(6,929,000)
Proceeds from credit facility			0	25,700,000	17,300,000
Debt issuance costs			0	0	(628,000)
Net cash provided by (used in) financing activities			(11,140,000)	76,144,000	77,755,000
Net change in cash and cash equivalents			43,947,000	(23,315,000)	25,319,000
Cash and cash equivalents at beginning of period			77,093,000	100,408,000	75,089,000
Cash and cash equivalents at end of period			121,040,000	77,093,000	100,408,000
Parent Company [Member]
Operating activities:
Net income			152,659,000	88,419,000	63,316,000
Adjustments to reconcile net income to net cash used in operating activities:
Deferred tax (benefit) expense			(347,000)	(68,000)	(150,000)
Stock compensation expense			4,844,000	3,575,000	2,742,000
Equity in undistributed earnings of subsidiaries			(151,199,000)	(81,887,000)	(61,315,000)
Changes in operating assets and liabilities			3,955,000	7,520,000	(14,247,000)
Dividends received from subsidiary			8,000,000	0	5,000,000
Net cash provided by operating activities			17,912,000	17,559,000	(4,654,000)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Contribution to subsidiary			(571,000)	100,034,000	68,391,000
Net cash provided by (used in) investing activities			(571,000)	(100,034,000)	(68,391,000)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs			0	56,698,000	65,879,000
Common stock issued, stock options exercised			982,000	3,622,000	2,750,000
Payroll taxes withheld and remitted on share-based payments			(2,101,000)	(1,803,000)	617,000
Dividends paid			(10,021,000)	(8,073,000)	(6,929,000)
Proceeds from credit facility			0	25,700,000	17,300,000
Debt issuance costs			0	0	(628,000)
Net cash provided by (used in) financing activities			(11,140,000)	76,144,000	77,755,000
Net change in cash and cash equivalents			6,201,000	(6,331,000)	4,710,000
Cash and cash equivalents at beginning of period			8,395,000	14,726,000	10,016,000
Cash and cash equivalents at end of period			$ 14,596,000	$ 8,395,000	$ 14,726,000

Schedule II - Condensed Finan_6

Schedule II - Condensed Financial Information of Registrant, Notes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Current borrowing capacity	$ 50,000,000
Accordion feature	$ 30,000,000
Maturity date	May 28, 2024
Interest rate description	Eurodollar loans bear an interest rate per annum equal to adjusted LIBOR for the applicable interest period plus a margin of 1.75%. ABR loans bear an interest rate per annum equal to the higher of the prime rate, the New York Federal Reserve Board Rate or the one-month adjusted LIBOR, plus the applicable margin of 0.75% to 1.75%, depending on which interest option was applicable for the particular ABR loan.
Credit facility	$ 42,696,000	$ 42,570,000
Debt issuance costs	$ 300,000
Weighted average interest rate	1.92%
Interest expense	$ 1,000,000	1,000,000	$ 200,000
Interest capitalized		800,000	200,000
Interest paid	900,000	800,000	100,000
Cash dividends paid to parent company by consolidated subsidiaries	$ 8,000,000	$ 0	$ 5,000,000

Schedule V - Valuation and Qu_2

Schedule V - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	$ 400	$ 300	$ 300
Accounting Standards Update 2016-13 [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Adoption of ASU 2016-13	400
Allowance for Premiums Receivable [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	3,087	2,705	2,615
Balance at beginning of period, net of adoption of new accounting standard for credit losses				$ 2,345
Additions amounts charged to expense	2,189	1,240	835
Deductions amounts written off or disposals	(1,885)	(498)	(745)
Balance at end of period	3,391	3,087	2,705
Valuation Allowance for Deferred Tax Assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	3,491	1,592	780
Additions amounts charged to expense	668	1,899	812
Deductions amounts written off or disposals	0	0	0
Balance at end of period	4,159	3,491	1,592
Allowance for Reinsurance Recoverable [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	282	282
Additions amounts charged to expense	118	0
Deductions amounts written off or disposals	0	0
Balance at end of period	$ 400	$ 282	$ 282