Kinsale Capital (KNSL) 10-Q 2 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2019	Apr. 26, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	Kinsale Capital Group, Inc.
Trading Symbol	KNSL
Entity Central Index Key	0001669162
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		21,286,456

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Fixed-maturity securities available for sale, at fair value (amortized cost: $536,182 in 2019; $514,237 in 2018)	$ 540,778	$ 510,251
Equity securities, at fair value (cost: $56,926 in 2019 $56,051 in 2018)	64,481	57,711
Total investments	605,259	567,962
Cash and cash equivalents	102,874	75,089
Investment income due and accrued	3,587	3,783
Premiums receivable, net	30,941	24,253
Reinsurance recoverables	59,334	56,788
Ceded unearned premiums	16,987	16,072
Deferred policy acquisition costs, net of ceding commissions	16,314	14,801
Intangible assets	3,538	3,538
Deferred income tax asset, net	6,928	7,176
Other assets	7,111	3,601
Total assets	852,873	773,063
Liabilities
Reserves for unpaid losses and loss adjustment expenses	385,125	369,152
Unearned premiums	140,741	128,250
Payable to reinsurers	5,532	4,565
Accounts payable and accrued expenses	4,840	7,090
Other liabilities	27,746	20
Total liabilities	563,984	509,077
Stockholders' Equity
Common stock, $0.01 par value, 400,000,000 shares authorized, 21,284,527 and 21,241,504 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	213	212
Additional paid-in capital	159,589	158,485
Retained earnings	123,563	106,545
Accumulated other comprehensive (loss) income	5,524	(1,256)
Total stockholders’ equity	288,889	263,986
Total liabilities and stockholders’ equity	$ 852,873	$ 773,063

Consolidated Balance Sheet (Una

Consolidated Balance Sheet (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets [Abstract]
Fixed-maturity securities available-for-sale - amortized cost	$ 536,182	$ 514,237
Equity securities - cost	$ 56,926	$ 56,051
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)	21,284,527	21,241,504
Common stock, shares outstanding (in shares)	21,284,527	21,241,504

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Gross written premiums	$ 84,626	$ 63,847
Ceded written premiums	(11,559)	(8,756)
Net written premiums	73,067	55,091
Change in unearned premiums	(11,576)	(7,030)
Net earned premiums	61,491	48,061
Net investment income	4,515	3,229
Net unrealized gains (losses) on equity securities	5,895	(1,279)
Realized gains on investments	280	112
Other income	4	3
Total revenues	72,185	50,126
Expenses:
Losses and loss adjustment expenses	33,732	28,899
Underwriting, acquisition and insurance expenses	15,616	12,398
Other expenses	36	14
Total expenses	49,384	41,311
Income before income taxes	22,801	8,815
Total income tax expense	4,081	1,528
Net income	18,720	7,287
Other comprehensive income (loss):
Change in unrealized gains (losses) on available-for-sale investments, net of taxes of $1,802 in 2019 and $(1,291) in 2018	6,780	(4,856)
Total comprehensive income	$ 25,500	$ 2,431
Earnings per share:
Basic	$ 0.88	$ 0.35
Diluted	$ 0.86	$ 0.34
Weighted average shares outstanding
Basic	21,169	21,045
Diluted	21,763	21,628

Consolidated Statements of In_2

Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Income taxes on change in unrealized gains (losses) on available-for-sale investments	$ 1,801	$ (1,291)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-01 [Member]	$ 0			$ 6,490	$ (6,490)
Balance, shares at Dec. 31, 2017	21,036,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (shares)	36,000
Balance, shares at Mar. 31, 2018	21,072,000
Balance at Dec. 31, 2017	$ 238,189	$ 210	$ 155,082	73,502	9,395
Balance (Accounting Standards Update 2016-01 [Member]) at Dec. 31, 2017				79,992	2,905
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of tax effects resulting from the TCJA	0
Reclassification of tax effects resulting from the TCJA | Accounting Standards Update 2018-02 [Member]				(1,308)	1,308
Issuance of stock under stock-based compensation plan	545	0	545
Stock-based compensation	158		158
Dividends declared	(1,473)			(1,473)
Other comprehensive income (loss)	(4,856)				(4,856)
Net income	7,287			7,287
Balance at Mar. 31, 2018	$ 239,850	210	155,785	84,498	(643)
Balance, shares at Dec. 31, 2018	21,241,504
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (shares)	43,000
Balance, shares at Mar. 31, 2019	21,284,527
Balance at Dec. 31, 2018	$ 263,986	212	158,485	106,545	(1,256)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under stock-based compensation plan	598	1	597
Stock-based compensation	507		507
Dividends declared	(1,702)			(1,702)
Other comprehensive income (loss)	6,780				6,780
Net income	18,720			18,720
Balance at Mar. 31, 2019	$ 288,889	$ 213	$ 159,589	$ 123,563	$ 5,524

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared, per share	$ 0.08	$ 0.07

Condensed Consolidated Statemen

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Activities
Net cash provided by operating activities	$ 33,804	$ 21,437
Investing Activities
Purchase of property and equipment	(3,925)	(94)
Purchases – fixed-maturity securities	(43,040)	(82,587)
Purchases - equity securities	(1,831)	(3,168)
Sales – fixed-maturity securities	28,416	3,913
Sales - equity securities	915	982
Maturities and calls – fixed-maturity securities	14,545	35,357
Net cash used in investing activities	(4,920)	(45,597)
Financing Activities
Proceeds from stock options exercised	597	545
Dividends paid	(1,696)	(1,473)
Net cash used in financing activities	(1,099)	(928)
Net change in cash and cash equivalents	27,785	(25,088)
Cash and cash equivalents at beginning of year	75,089	81,747
Cash and cash equivalents at end of period	$ 102,874	$ 56,659

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of significant accounting policies Basis of presentation The accompanying condensed consolidated financial statements and notes have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. For a more complete description of the Company’s business and accounting policies, these condensed consolidated interim financial statements should be read in conjunction with the audited consolidated financial statements of Kinsale Capital Group, Inc. and its wholly owned subsidiaries (the "Company") included in the Annual Report on Form 10-K for the year ended December 31, 2018. In the opinion of management, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included. Such adjustments consist only of normal recurring items. All significant intercompany balances and transactions have been eliminated in consolidation. Interim results are not necessarily indicative of results of operations for the full year. Use of estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the condensed 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. Recently adopted accounting pronouncements ASU 2016-02, Leases (Topic 842) In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)" to improve the financial reporting of leasing transactions. Under this ASU, lessees will recognize a right-of-use ("ROU") asset and corresponding liability on the balance sheet for all leases, except for leases covering a period of 12 months or less. The lessee’s income statement treatment for leases will vary depending on the nature and classification of the lease. Effective January 1, 2019, the Company adopted this ASU and recorded a ROU asset and corresponding lease liability of approximately $0.9 million . The ROU and operating lease liability are included in "other assets" and "other liabilities," respectively, in the accompanying consolidated balance sheet. The Company elected the package of practical expedients permitted under the adoption of the new standard, which allowed the Company to account for existing leases under their current classification, as well as omit any new costs classified as initial direct costs, under the new standard. This election kept the existing agreements as operating leases. The Company also elected the practical expedient allowing an accounting policy election by class of underlying asset, to account for separate lease and nonlease components as a single lease component. In addition, the Company has implemented the necessary internal controls relating to the adoption of the standard. ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities In March 2017, the FASB issued ASU 2017-08, "Premium Amortization on Purchased Callable Debt Securities," which shortens the amortization period of the premium for certain callable debt securities, from the contractual maturity date to the earliest call date. Effective January 1, 2019, the Company adopted ASU 2017-08 using a modified retrospective approach. The adoption of ASU 2017-08 did not have a material impact on the Company's financial statements. Prospective accounting pronouncements ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) In June 2016, the FASB issued ASU 2016-13, "Financial Instruments – Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. Current GAAP delays the recognition of credit losses until it is probable a loss has been incurred. The update will require 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 debt securities will also be recorded through an allowance for credit losses. However, the amendments would limit the amount of the allowance to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under current GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. This ASU is effective for annual and interim reporting periods beginning after December 15, 2019. Early adoption is permitted beginning after December 15, 2018. Upon adoption, the update will be applied using the modified-retrospective approach, by which a cumulative-effect adjustment will be made to retained earnings as of the beginning of the first reporting period presented. The Company is currently evaluating the impact of the adoption on its consolidated financial statements. 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	3 Months Ended
	Mar. 31, 2019
Investments [Abstract]
Investments	Investments Available-for-sale investments The following tables summarize the available-for-sale investments at March 31, 2019 and December 31, 2018 : March 31, 2019 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 110 $ 2 $ — $ 112 Obligations of states, municipalities and political subdivisions 126,050 4,164 (54 ) 130,160 Corporate and other securities 108,757 1,676 (310 ) 110,123 Commercial mortgage and asset-backed securities 164,341 912 (841 ) 164,412 Residential mortgage-backed securities 136,924 774 (1,727 ) 135,971 Total available-for-sale investments $ 536,182 $ 7,528 $ (2,932 ) $ 540,778 December 31, 2018 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 610 $ 2 $ (1 ) $ 611 Obligations of states, municipalities and political subdivisions 153,884 2,010 (1,294 ) 154,600 Corporate and other securities 97,889 264 (1,401 ) 96,752 Commercial mortgage and asset-backed securities 151,137 252 (1,522 ) 149,867 Residential mortgage-backed securities 110,717 354 (2,650 ) 108,421 Total available-for-sale investments $ 514,237 $ 2,882 $ (6,868 ) $ 510,251 Available-for-sale securities in a loss position The Company regularly reviews all its available-for-sale investments with unrealized losses to assess whether the decline in the securities’ fair value is deemed to be an other-than-temporary impairment ("OTTI"). The Company considers a number of factors in completing its OTTI review, including the length of time and 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 an OTTI, but rather a temporary decline in fair value. 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 considered to be other-than-temporary 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, resulting in a new cost basis for the security. If the decline in fair value of a fixed-maturity security below its amortized cost is considered to be other-than-temporary based upon other considerations, 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 OTTI, which is recognized in net income, resulting in a new cost basis for the security. Any remaining decline in fair value represents the noncredit portion of the OTTI, which is recognized in other comprehensive income. The following tables summarize gross unrealized losses and fair value for available-for-sale investments by length of time that the securities have continuously been in an unrealized loss position: March 31, 2019 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 $ — $ — $ 9,756 $ (54 ) $ 9,756 $ (54 ) Corporate and other securities 2,313 (15 ) 12,143 (295 ) 14,456 (310 ) Commercial mortgage and asset-backed securities 60,061 (532 ) 29,952 (309 ) 90,013 (841 ) Residential mortgage-backed securities 20,391 (41 ) 58,361 (1,686 ) 78,752 (1,727 ) Total available-for-sale investments $ 82,765 $ (588 ) $ 110,212 $ (2,344 ) $ 192,977 $ (2,932 ) At March 31, 2019 , the Company held 152 fixed-maturity securities in an unrealized loss position with a total estimated fair value of $193.0 million and gross unrealized losses of $2.9 million . Of these securities, 118 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 any other-than-temporary impairment has occurred. Based on the Company's review as of March 31, 2019, unrealized losses were caused by interest rate changes or other market factors and were not credit-specific issues. At March 31, 2019 , 85.4% of the Company’s fixed-maturity securities were rated "A-" or better and all of the Company’s fixed-maturity securities made expected coupon payments under the contractual terms of the securities. For the three months ended March 31, 2019 , the Company concluded that there were no other-than-temporary impairments from fixed-maturity securities with unrealized losses. December 31, 2018 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: U.S. Treasury securities and obligations of U.S. government agencies $ — $ — $ 499 $ (1 ) $ 499 $ (1 ) Obligations of states, municipalities and political subdivisions 42,718 (440 ) 34,326 (854 ) 77,044 (1,294 ) Corporate and other securities 62,045 (890 ) 12,092 (511 ) 74,137 (1,401 ) Commercial mortgage and asset-backed securities 93,247 (1,017 ) 25,746 (505 ) 118,993 (1,522 ) Residential mortgage-backed securities 24,571 (155 ) 55,638 (2,495 ) 80,209 (2,650 ) Total available-for-sale investments $ 222,581 $ (2,502 ) $ 128,301 $ (4,366 ) $ 350,882 $ (6,868 ) At December 31, 2018 , the Company held 317 fixed-maturity securities in an unrealized loss position with a total estimated fair value of $350.9 million and gross unrealized losses of $6.9 million . Of those securities, 158 were in a continuous unrealized loss position for greater than one year. Based on the Company's review as of December 31, 2018, unrealized losses were caused by interest rate changes or other market factors and were not credit-specific issues. At December 31, 2018 , 86.4% of the Company’s fixed-maturity securities were rated "A-" or better and all of the Company’s fixed-maturity securities made expected coupon payments under the contractual terms of the securities. For the year ended December 31, 2018 , the Company concluded that there were no other-than-temporary impairments from fixed-maturity securities with unrealized losses. Contractual maturities of available-for-sale fixed-maturity securities The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at March 31, 2019 are summarized, by contractual maturity, as follows: March 31, 2019 Amortized Estimated Cost Fair Value (in thousands) Due in one year or less $ 4,270 $ 4,265 Due after one year through five years 75,192 76,142 Due after five years through ten years 53,708 55,609 Due after ten years 101,747 104,379 Commercial mortgage and asset-backed securities 164,341 164,412 Residential mortgage-backed securities 136,924 135,971 Total fixed maturities $ 536,182 $ 540,778 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 for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Interest: Taxable bonds $ 3,067 $ 1,761 Tax exempt municipal bonds 1,008 1,085 Cash equivalents and short-term investments 245 260 Dividends on equity securities 521 412 Gross investment income 4,841 3,518 Investment expenses (326 ) (289 ) Net investment income $ 4,515 $ 3,229 Realized investment gains and losses The following table presents realized investment gains and losses for the three months ended March 31, 2019 and 2018 : Three Months Ended 2019 2018 (in thousands) Fixed-maturity securities: Realized gains $ 371 $ 55 Realized losses (79 ) — Net realized gains from fixed-maturity securities 292 55 Equity securities: Realized gains 4 57 Realized losses (16 ) — Net realized (losses) gains from equity securities (12 ) 57 Net realized investment gains $ 280 $ 112 Change in net unrealized gains (losses) on fixed-maturity securities For the three months ended March 31, 2019 , the change in net unrealized gains for fixed-maturity securities was $8.6 million . For the three months ended March 31, 2018 , the change in net unrealized losses for fixed-maturity securities was $6.1 million . Insurance – statutory deposits The Company had invested assets with a carrying value of $6.9 million on deposit with state regulatory authorities at March 31, 2019 and December 31, 2018 . Payable for investments purchased The Company recorded a payable for investments purchased, not yet settled, of $22.1 million at March 31, 2019 . The payable balance was included in the "other liabilities" line item of the balance sheet and treated as a non-cash transaction for purposes of cash flow presentation.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair value measurements Fair value was estimated for each class of financial instrument for which it was practical to estimate fair value. Fair value is defined as the price in the principal market that would be received for an asset 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 manager from third party pricing services, where available. For securities where the Company is unable to obtain fair values from a pricing service or broker, fair values are estimated using information obtained from the Company's investment manager. Management performs several procedures to ascertain the reasonableness of investment values included in the condensed consolidated financial statements including 1) obtaining and reviewing internal control reports from the Company's investment manager that obtains fair values from third party pricing services, 2) discussing with the Company's investment manager its process for reviewing and validating pricing obtained from outside pricing services and 3) reviewing the security pricing received from the Company's investment manager and monitoring changes in unrealized gains and losses. 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 March 31, 2019 and December 31, 2018 , by level within the fair value hierarchy. March 31, 2019 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 112 $ — $ — $ 112 Obligations of states, municipalities and political subdivisions — 130,160 — 130,160 Corporate and other securities — 110,123 — 110,123 Commercial mortgage and asset-backed securities — 164,412 — 164,412 Residential mortgage-backed securities — 135,971 — 135,971 Total fixed maturities 112 540,666 — 540,778 Equity securities: Exchange traded funds 43,834 — — 43,834 Nonredeemable preferred stock — 20,647 — 20,647 Total equity securities 43,834 20,647 — 64,481 Total $ 43,946 $ 561,313 $ — $ 605,259 December 31, 2018 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 611 $ — $ — $ 611 Obligations of states, municipalities and political subdivisions — 154,600 — 154,600 Corporate and other securities — 96,752 — 96,752 Commercial mortgage and asset-backed securities — 149,867 — 149,867 Residential mortgage-backed securities — 108,421 — 108,421 Total fixed maturities 611 509,640 — 510,251 Equity securities: Exchange traded funds 38,987 — — 38,987 Nonredeemable preferred stock — 18,724 — 18,724 Total equity securities 38,987 18,724 — 57,711 Total $ 39,598 $ 528,364 $ — $ 567,962 There were no transfers into or out of Level 1 and Level 2 during the three months ended March 31, 2019 . There were no assets or liabilities measured at fair value on a nonrecurring basis as of March 31, 2019 or December 31, 2018 . Due to the relatively short-term nature of cash and cash equivalents, short-term investments, receivables and payables, their carrying amounts are reasonable estimates of fair value.

Deferred Policy Acquisition Cos

Deferred Policy Acquisition Costs	3 Months Ended
	Mar. 31, 2019
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 three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Balance, beginning of period $ 14,801 $ 11,775 Policy acquisition costs deferred: Direct commissions 12,363 9,377 Ceding commissions (3,256 ) (2,541 ) Other underwriting and policy acquisition costs 965 809 Policy acquisition costs deferred 10,072 7,645 Amortization of net policy acquisition costs (8,559 ) (6,652 ) Balance, end of period $ 16,314 $ 12,768

Underwriting, Acquisition and I

Underwriting, Acquisition and Insurance Expenses	3 Months Ended
	Mar. 31, 2019
Underwriting, Acquisition and Insurance Expenses [Abstract]
Underwriting, acquisition and insurance expenses	Underwriting, acquisition and insurance expenses Underwriting, acquisition and insurance expenses for the three months ended March 31, 2019 and 2018 consist of the following: Three Months Ended March 31, 2019 2018 (in thousands) Underwriting, acquisition and insurance expenses incurred: Direct commissions $ 10,674 $ 8,379 Ceding commissions (2,938 ) (2,444 ) Other operating expenses 7,880 6,463 Total $ 15,616 $ 12,398 Other operating expenses within underwriting, acquisition and insurance expenses include salaries, bonus and employee benefits expenses of $6.8 million and $5.0 million for the three months ended March 31, 2019 and 2018 , respectively.

Stock-based Compensation

Stock-based Compensation	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Stock-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 total compensation cost that has been charged against income for share-based compensation arrangements was $0.5 million and $0.2 million for the three months ended March 31, 2019 and 2018, respectively. Restricted Stock Awards During the first quarter of 2019, 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 one -year period. The fair value of restricted stock awards was determined based on the closing trading price of the Company’s shares on the grant date or, if no shares were traded on the grant date, the last preceding date for which there was a sale of shares. 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 dividends. Unvested shares of restricted stock awards and accrued dividends, if any, are forfeited upon the termination of service to or employment with the Company. A summary of all restricted stock activity under the equity compensation plans for the three months ended March 31, 2019 is as follows: For the Three Months Ended March 31, 2019 Number of Shares Weighted Average Grant Date Fair Value per Share Non-vested outstanding at the beginning of the period 92,465 $ 52.98 Granted 7,020 $ 55.56 Vested (6,666 ) $ 45.00 Forfeited (1,305 ) $ 53.60 Non-vested outstanding at the end of the period 91,514 $ 53.75 As of March 31, 2019 , the Company had $3.9 million of total unrecognized stock-based compensation expense expected to be charged to earnings over a weighted-average period of 3.0 years. 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 and a weighted-average grant-date fair value of $2.71 per share. The options have a maximum contractual term of 10 years and vest in 4 equal annual installments following the date of the grant. 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 March 31, 2019 , and changes during the period then ended is presented below: Number of Shares Weighted-average exercise price Weighted-average remaining years of contractual term Aggregate intrinsic value (in thousands) Outstanding at January 1, 2019 804,303 $ 16.00 Granted — — Forfeited (12,600 ) 16.00 Exercised (37,308 ) 16.00 Outstanding at March 31, 2019 754,395 $ 16.00 7.3 $ 39,659 Exercisable at March 31, 2019 302,629 $ 16.00 7.3 $ 15,909 The total intrinsic value of options exercised was $1.9 million and $1.0 million during the three months ended March 31, 2019 and 2018, respectively. As of March 31, 2019 , the Company had $0.8 million of total unrecognized stock-based compensation expense expected to be charged to earnings over a weighted-average period of 1.3 years.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings per share The following represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements: Three Months Ended March 31, 2019 2018 (in thousands, except per share data) Net income $ 18,720 $ 7,287 Weighted average common shares outstanding - basic 21,169 21,045 Effect of potential dilutive securities: Conversion of stock options 568 581 Conversion of restricted stock 26 2 Weighted average common shares outstanding - diluted 21,763 21,628 Earnings per common share: Basic $ 0.88 $ 0.35 Diluted $ 0.86 $ 0.34 There were no anti-dilutive stock awards for the three months ended March 31, 2019 or 2018.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income taxes The Company uses the estimated annual effective tax rate method for calculating its tax provision in interim periods, which represents the Company's best estimate of the effective tax rate expected for the full year. The estimated annual effective tax rate typically differs from the U.S. statutory tax rate primarily as a result of tax-exempt investment income and any discrete items recognized during the period. The Company's effective tax rates were 17.9% and 17.3% for the three months ended March 31, 2019 and 2018, respectively. The decrease in the effective tax rate in the first quarter of 2019 and the first quarter of 2018 was primarily due to stock options exercised and tax-exempt interest income relative to pre-tax income.

Reserves for Unpaid Losses and

Reserves for Unpaid Losses and Loss Adjustment Expenses	3 Months Ended
	Mar. 31, 2019
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract]
Reserves for Unpaid Losses and Loss Adjustment Expenses	Reserves for 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: March 31, 2019 2018 (in thousands) Net reserves for unpaid losses and loss adjustment expenses, beginning of year $ 313,763 $ 267,493 Incurred losses and loss adjustment expenses: Current year 40,128 30,183 Prior years (6,396 ) (1,284 ) Total net losses and loss adjustment expenses incurred 33,732 28,899 Payments: Current year 2,042 340 Prior years 17,955 17,516 Total payments 19,997 17,856 Net reserves for unpaid losses and loss adjustment expenses, end of period 327,498 278,536 Reinsurance recoverable on unpaid losses 57,627 49,673 Gross reserves for unpaid losses and loss adjustment expenses, end of period $ 385,125 $ 328,209 During the three months ended March 31, 2019 , the reserves for unpaid losses and loss adjustment expenses held at December 31, 2018 developed favorably by $6.4 million . The favorable development was primarily attributable to the 2015 through 2018 accident years by $6.3 million , which resulted from reported losses emerging at a lower level than expected across most statutory lines of business. During the three months ended March 31, 2018 , the reserves for unpaid losses and loss adjustment expenses held at December 31, 2017 developed favorably by $1.3 million . The favorable development was primarily attributable to the 2017 accident year of $2.5 million and the 2016 accident year of $1.2 million , which resulted from reported losses emerging at a lower level than expected. This favorable development was offset in part by adverse development from the 2011 through 2015 accident years of $2.4 million .

Reinsurance

Reinsurance	3 Months Ended
	Mar. 31, 2019
Reinsurance Disclosures [Abstract]
Reinsurance	Reinsurance The following table summarizes the effect of reinsurance on premiums written and earned for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Written: Direct $ 84,563 $ 63,847 Assumed 63 — Ceded (11,559 ) (8,756 ) Net written $ 73,067 $ 55,091 Earned: Direct $ 72,078 $ 56,593 Assumed 57 — Ceded (10,644 ) (8,532 ) Net earned $ 61,491 $ 48,061 Incurred losses and loss adjustment expenses were net of reinsurance (ceded incurred losses and loss adjustment expenses) of $4.3 million and $2.9 million for the three months ended March 31, 2019 and 2018 , respectively. At March 31, 2019 , reinsurance recoverables on paid and unpaid losses were $1.7 million and $57.6 million , respectively. At December 31, 2018 , reinsurance recoverables on paid and unpaid losses were $1.4 million and $55.4 million , respectively.

Other Comprehensive (Loss) Inco

Other Comprehensive (Loss) Income	3 Months Ended
	Mar. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income	Other comprehensive income (loss) The following table summarizes the components of other comprehensive (loss) income for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Unrealized gains (losses) on fixed-maturity securities arising during the period, before income taxes: $ 8,873 $ (6,092 ) Income taxes (1,863 ) 1,279 Unrealized gains (losses) arising during the period, net of income taxes 7,010 (4,813 ) Less reclassification adjustment: Net realized gains on fixed-maturity securities, before income taxes 292 55 Income taxes (62 ) (12 ) Reclassification adjustment included in net income, net of income taxes 230 43 Other comprehensive income (loss) $ 6,780 $ (4,856 ) The sale of an available-for-sale fixed-maturity 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.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of presentation The accompanying condensed consolidated financial statements and notes have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. For a more complete description of the Company’s business and accounting policies, these condensed consolidated interim financial statements should be read in conjunction with the audited consolidated financial statements of Kinsale Capital Group, Inc. and its wholly owned subsidiaries (the "Company") included in the Annual Report on Form 10-K for the year ended December 31, 2018. In the opinion of management, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included. Such adjustments consist only of normal recurring items. All significant intercompany balances and transactions have been eliminated in consolidation. Interim results are not necessarily indicative of results of operations for the full year.
Use of Estimates	Use of estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the condensed 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.
Recently Adopted Accounting Pronouncements	Recently adopted accounting pronouncements ASU 2016-02, Leases (Topic 842) In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)" to improve the financial reporting of leasing transactions. Under this ASU, lessees will recognize a right-of-use ("ROU") asset and corresponding liability on the balance sheet for all leases, except for leases covering a period of 12 months or less. The lessee’s income statement treatment for leases will vary depending on the nature and classification of the lease. Effective January 1, 2019, the Company adopted this ASU and recorded a ROU asset and corresponding lease liability of approximately $0.9 million . The ROU and operating lease liability are included in "other assets" and "other liabilities," respectively, in the accompanying consolidated balance sheet. The Company elected the package of practical expedients permitted under the adoption of the new standard, which allowed the Company to account for existing leases under their current classification, as well as omit any new costs classified as initial direct costs, under the new standard. This election kept the existing agreements as operating leases. The Company also elected the practical expedient allowing an accounting policy election by class of underlying asset, to account for separate lease and nonlease components as a single lease component. In addition, the Company has implemented the necessary internal controls relating to the adoption of the standard. ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities In March 2017, the FASB issued ASU 2017-08, "Premium Amortization on Purchased Callable Debt Securities," which shortens the amortization period of the premium for certain callable debt securities, from the contractual maturity date to the earliest call date.
Prospective Accounting Pronouncements	Prospective accounting pronouncements ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) In June 2016, the FASB issued ASU 2016-13, "Financial Instruments – Credit Losses (Topic 326)" to provide more useful information about the expected credit losses on financial instruments. Current GAAP delays the recognition of credit losses until it is probable a loss has been incurred. The update will require 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 debt securities will also be recorded through an allowance for credit losses. However, the amendments would limit the amount of the allowance to the amount by which fair value is below amortized cost. The measurement of credit losses on available-for-sale securities is similar under current GAAP, but the update requires the use of the allowance account through which amounts can be reversed, rather than through an irreversible write-down. This ASU is effective for annual and interim reporting periods beginning after December 15, 2019. Early adoption is permitted beginning after December 15, 2018. Upon adoption, the update will be applied using the modified-retrospective approach, by which a cumulative-effect adjustment will be made to retained earnings as of the beginning of the first reporting period presented. The Company is currently evaluating the impact of the adoption on its consolidated financial statements. 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 (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 2019
Investments [Abstract]
Available-for-sale Investments	The following tables summarize the available-for-sale investments at March 31, 2019 and December 31, 2018 : March 31, 2019 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 110 $ 2 $ — $ 112 Obligations of states, municipalities and political subdivisions 126,050 4,164 (54 ) 130,160 Corporate and other securities 108,757 1,676 (310 ) 110,123 Commercial mortgage and asset-backed securities 164,341 912 (841 ) 164,412 Residential mortgage-backed securities 136,924 774 (1,727 ) 135,971 Total available-for-sale investments $ 536,182 $ 7,528 $ (2,932 ) $ 540,778 December 31, 2018 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value (in thousands) Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 610 $ 2 $ (1 ) $ 611 Obligations of states, municipalities and political subdivisions 153,884 2,010 (1,294 ) 154,600 Corporate and other securities 97,889 264 (1,401 ) 96,752 Commercial mortgage and asset-backed securities 151,137 252 (1,522 ) 149,867 Residential mortgage-backed securities 110,717 354 (2,650 ) 108,421 Total available-for-sale investments $ 514,237 $ 2,882 $ (6,868 ) $ 510,251
Available-for-sale Securities in an Unrealized Loss Position	December 31, 2018 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: U.S. Treasury securities and obligations of U.S. government agencies $ — $ — $ 499 $ (1 ) $ 499 $ (1 ) Obligations of states, municipalities and political subdivisions 42,718 (440 ) 34,326 (854 ) 77,044 (1,294 ) Corporate and other securities 62,045 (890 ) 12,092 (511 ) 74,137 (1,401 ) Commercial mortgage and asset-backed securities 93,247 (1,017 ) 25,746 (505 ) 118,993 (1,522 ) Residential mortgage-backed securities 24,571 (155 ) 55,638 (2,495 ) 80,209 (2,650 ) Total available-for-sale investments $ 222,581 $ (2,502 ) $ 128,301 $ (4,366 ) $ 350,882 $ (6,868 ) The following tables summarize gross unrealized losses and fair value for available-for-sale investments by length of time that the securities have continuously been in an unrealized loss position: March 31, 2019 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 $ — $ — $ 9,756 $ (54 ) $ 9,756 $ (54 ) Corporate and other securities 2,313 (15 ) 12,143 (295 ) 14,456 (310 ) Commercial mortgage and asset-backed securities 60,061 (532 ) 29,952 (309 ) 90,013 (841 ) Residential mortgage-backed securities 20,391 (41 ) 58,361 (1,686 ) 78,752 (1,727 ) Total available-for-sale investments $ 82,765 $ (588 ) $ 110,212 $ (2,344 ) $ 192,977 $ (2,932 )
Contractual Maturities of Available-for-sale Fixed Maturity Securities	The amortized cost and estimated fair value of available-for-sale fixed-maturity securities at March 31, 2019 are summarized, by contractual maturity, as follows: March 31, 2019 Amortized Estimated Cost Fair Value (in thousands) Due in one year or less $ 4,270 $ 4,265 Due after one year through five years 75,192 76,142 Due after five years through ten years 53,708 55,609 Due after ten years 101,747 104,379 Commercial mortgage and asset-backed securities 164,341 164,412 Residential mortgage-backed securities 136,924 135,971 Total fixed maturities $ 536,182 $ 540,778
Net Investment Income	The following table presents the components of net investment income for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Interest: Taxable bonds $ 3,067 $ 1,761 Tax exempt municipal bonds 1,008 1,085 Cash equivalents and short-term investments 245 260 Dividends on equity securities 521 412 Gross investment income 4,841 3,518 Investment expenses (326 ) (289 ) Net investment income $ 4,515 $ 3,229
Realized Gain (Loss) on Investments	The following table presents realized investment gains and losses for the three months ended March 31, 2019 and 2018 : Three Months Ended 2019 2018 (in thousands) Fixed-maturity securities: Realized gains $ 371 $ 55 Realized losses (79 ) — Net realized gains from fixed-maturity securities 292 55 Equity securities: Realized gains 4 57 Realized losses (16 ) — Net realized (losses) gains from equity securities (12 ) 57 Net realized investment gains $ 280 $ 112

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 and December 31, 2018 , by level within the fair value hierarchy. March 31, 2019 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 112 $ — $ — $ 112 Obligations of states, municipalities and political subdivisions — 130,160 — 130,160 Corporate and other securities — 110,123 — 110,123 Commercial mortgage and asset-backed securities — 164,412 — 164,412 Residential mortgage-backed securities — 135,971 — 135,971 Total fixed maturities 112 540,666 — 540,778 Equity securities: Exchange traded funds 43,834 — — 43,834 Nonredeemable preferred stock — 20,647 — 20,647 Total equity securities 43,834 20,647 — 64,481 Total $ 43,946 $ 561,313 $ — $ 605,259 December 31, 2018 Level 1 Level 2 Level 3 Total (in thousands) Assets Fixed maturities: U.S. Treasury securities and obligations of U.S. government agencies $ 611 $ — $ — $ 611 Obligations of states, municipalities and political subdivisions — 154,600 — 154,600 Corporate and other securities — 96,752 — 96,752 Commercial mortgage and asset-backed securities — 149,867 — 149,867 Residential mortgage-backed securities — 108,421 — 108,421 Total fixed maturities 611 509,640 — 510,251 Equity securities: Exchange traded funds 38,987 — — 38,987 Nonredeemable preferred stock — 18,724 — 18,724 Total equity securities 38,987 18,724 — 57,711 Total $ 39,598 $ 528,364 $ — $ 567,962

Deferred Policy Acquisition C_2

Deferred Policy Acquisition Costs (Tables)	3 Months Ended
	Mar. 31, 2019
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 three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Balance, beginning of period $ 14,801 $ 11,775 Policy acquisition costs deferred: Direct commissions 12,363 9,377 Ceding commissions (3,256 ) (2,541 ) Other underwriting and policy acquisition costs 965 809 Policy acquisition costs deferred 10,072 7,645 Amortization of net policy acquisition costs (8,559 ) (6,652 ) Balance, end of period $ 16,314 $ 12,768

Underwriting, Acquisition and_2

Underwriting, Acquisition and Insurance Expenses (Tables)	3 Months Ended
	Mar. 31, 2019
Underwriting, Acquisition and Insurance Expenses [Abstract]
Underwriting, acquisition and insurance expenses	Underwriting, acquisition and insurance expenses for the three months ended March 31, 2019 and 2018 consist of the following: Three Months Ended March 31, 2019 2018 (in thousands) Underwriting, acquisition and insurance expenses incurred: Direct commissions $ 10,674 $ 8,379 Ceding commissions (2,938 ) (2,444 ) Other operating expenses 7,880 6,463 Total $ 15,616 $ 12,398

Stock-based Compensation (Table

Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted Stock Activity	A summary of all restricted stock activity under the equity compensation plans for the three months ended March 31, 2019 is as follows: For the Three Months Ended March 31, 2019 Number of Shares Weighted Average Grant Date Fair Value per Share Non-vested outstanding at the beginning of the period 92,465 $ 52.98 Granted 7,020 $ 55.56 Vested (6,666 ) $ 45.00 Forfeited (1,305 ) $ 53.60 Non-vested outstanding at the end of the period 91,514 $ 53.75
Stock Options Valuation Assumptions	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
Stock Options Activity	A summary of option activity as of March 31, 2019 , and changes during the period then ended is presented below: Number of Shares Weighted-average exercise price Weighted-average remaining years of contractual term Aggregate intrinsic value (in thousands) Outstanding at January 1, 2019 804,303 $ 16.00 Granted — — Forfeited (12,600 ) 16.00 Exercised (37,308 ) 16.00 Outstanding at March 31, 2019 754,395 $ 16.00 7.3 $ 39,659 Exercisable at March 31, 2019 302,629 $ 16.00 7.3 $ 15,909

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	The following represents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computations contained in the consolidated financial statements: Three Months Ended March 31, 2019 2018 (in thousands, except per share data) Net income $ 18,720 $ 7,287 Weighted average common shares outstanding - basic 21,169 21,045 Effect of potential dilutive securities: Conversion of stock options 568 581 Conversion of restricted stock 26 2 Weighted average common shares outstanding - diluted 21,763 21,628 Earnings per common share: Basic $ 0.88 $ 0.35 Diluted $ 0.86 $ 0.34

Reserves for Unpaid Losses an_2

Reserves for Unpaid Losses and Loss Adjustment Expenses (Tables)	3 Months Ended
	Mar. 31, 2019
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract]
Schedule of 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: March 31, 2019 2018 (in thousands) Net reserves for unpaid losses and loss adjustment expenses, beginning of year $ 313,763 $ 267,493 Incurred losses and loss adjustment expenses: Current year 40,128 30,183 Prior years (6,396 ) (1,284 ) Total net losses and loss adjustment expenses incurred 33,732 28,899 Payments: Current year 2,042 340 Prior years 17,955 17,516 Total payments 19,997 17,856 Net reserves for unpaid losses and loss adjustment expenses, end of period 327,498 278,536 Reinsurance recoverable on unpaid losses 57,627 49,673 Gross reserves for unpaid losses and loss adjustment expenses, end of period $ 385,125 $ 328,209

Reinsurance (Tables)

Reinsurance (Tables)	3 Months Ended
	Mar. 31, 2019
Reinsurance Disclosures [Abstract]
Effects of Reinsurance	The following table summarizes the effect of reinsurance on premiums written and earned for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Written: Direct $ 84,563 $ 63,847 Assumed 63 — Ceded (11,559 ) (8,756 ) Net written $ 73,067 $ 55,091 Earned: Direct $ 72,078 $ 56,593 Assumed 57 — Ceded (10,644 ) (8,532 ) Net earned $ 61,491 $ 48,061

Other Comprehensive (Loss) In_2

Other Comprehensive (Loss) Income (Tables)	3 Months Ended
	Mar. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Comprehensive Income (Loss)	The following table summarizes the components of other comprehensive (loss) income for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Unrealized gains (losses) on fixed-maturity securities arising during the period, before income taxes: $ 8,873 $ (6,092 ) Income taxes (1,863 ) 1,279 Unrealized gains (losses) arising during the period, net of income taxes 7,010 (4,813 ) Less reclassification adjustment: Net realized gains on fixed-maturity securities, before income taxes 292 55 Income taxes (62 ) (12 ) Reclassification adjustment included in net income, net of income taxes 230 43 Other comprehensive income (loss) $ 6,780 $ (4,856 )

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - Accounting Standards Update 2016-02 [Member] $ in Thousands	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Liability	$ 900
Operating Lease, Right-of-Use Asset	$ 900

Investments Investments (Availa

Investments Investments (Available for Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 536,182	$ 514,237
Gross Unrealized Holding Gains	7,528	2,882
Gross Unrealized Holding Losses	2,932	6,868
Estimated Fair Value	540,778	510,251
U.S. Treasury securities and obligations of U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	110	610
Gross Unrealized Holding Gains	2	2
Gross Unrealized Holding Losses	0	1
Estimated Fair Value	112	611
Obligations of states, municipalities and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	126,050	153,884
Gross Unrealized Holding Gains	4,164	2,010
Gross Unrealized Holding Losses	54	1,294
Estimated Fair Value	130,160	154,600
Corporate and other securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	108,757	97,889
Gross Unrealized Holding Gains	1,676	264
Gross Unrealized Holding Losses	310	1,401
Estimated Fair Value	110,123	96,752
Commercial mortgage and asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	164,341	151,137
Gross Unrealized Holding Gains	912	252
Gross Unrealized Holding Losses	841	1,522
Estimated Fair Value	164,412	149,867
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	136,924	110,717
Gross Unrealized Holding Gains	774	354
Gross Unrealized Holding Losses	1,727	2,650
Estimated Fair Value	$ 135,971	$ 108,421

Investments Available-for-Sale

Investments Available-for-Sale Securities in a Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	$ 82,765	$ 222,581
Less than 12 months, gross unrealized holding losses	588	2,502
12 Months or Longer, Estimated Fair Value	110,212	128,301
12 Months or Longer, Gross Unrealized Holding Losses	2,344	4,366
Total Estimated Fair Value	192,977	350,882
Total Gross Unrealized Holding Losses	(2,932)	(6,868)
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		0
Less than 12 months, gross unrealized holding losses		0
12 Months or Longer, Estimated Fair Value		499
12 Months or Longer, Gross Unrealized Holding Losses		1
Total Estimated Fair Value		499
Total Gross Unrealized Holding Losses		(1)
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	0	42,718
Less than 12 months, gross unrealized holding losses	0	440
12 Months or Longer, Estimated Fair Value	9,756	34,326
12 Months or Longer, Gross Unrealized Holding Losses	54	854
Total Estimated Fair Value	9,756	77,044
Total Gross Unrealized Holding Losses	(54)	(1,294)
Corporate and other securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	2,313	62,045
Less than 12 months, gross unrealized holding losses	15	890
12 Months or Longer, Estimated Fair Value	12,143	12,092
12 Months or Longer, Gross Unrealized Holding Losses	295	511
Total Estimated Fair Value	14,456	74,137
Total Gross Unrealized Holding Losses	(310)	(1,401)
Commercial mortgage and asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	60,061	93,247
Less than 12 months, gross unrealized holding losses	532	1,017
12 Months or Longer, Estimated Fair Value	29,952	25,746
12 Months or Longer, Gross Unrealized Holding Losses	309	505
Total Estimated Fair Value	90,013	118,993
Total Gross Unrealized Holding Losses	(841)	(1,522)
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Estimated Fair Value	20,391	24,571
Less than 12 months, gross unrealized holding losses	41	155
12 Months or Longer, Estimated Fair Value	58,361	55,638
12 Months or Longer, Gross Unrealized Holding Losses	1,686	2,495
Total Estimated Fair Value	78,752	80,209
Total Gross Unrealized Holding Losses	$ (1,727)	$ (2,650)

Investments Available-for-Sal_2

Investments Available-for-Sale Securities in a Loss Position Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)Rate	Dec. 31, 2018USD ($)Rate
Debt Securities, Available-for-sale [Line Items]
Number of available-for-sale securities in unrealized loss positions	152	317
Total estimated fair value	$ 192,977	$ 350,882
Total gross unrealized holding losses	$ 2,932	$ 6,868
Number of available-for-sale securities in unrealized loss positions, greater than one year	118	158
Other-than- temporary impairment losses	$ 0	$ 0
Fixed maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, percentage of securities with ratings of A minus or better | Rate	85.40%	86.40%

Investments Contractual Maturit

Investments Contractual Maturities of Available-for-Sale Fixed Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in one year or less, Amortized Cost	$ 4,270
Due after one year through five years, Amortized Cost	75,192
Due after five years through ten years, Amortized Cost	53,708
Due after ten years, Amortized Cost	101,747
Total fixed maturities, Amortized Cost	536,182	$ 514,237
Estimated Fair Value
Due in one year or less, Estimated Fair Value	4,265
Due after one year through five years, Estimated Fair Value	76,142
Due after five years through ten years, Estimated Fair Value	55,609
Due after ten years, Estimated Fair Value	104,379
Estimated Fair Value	540,778	510,251
Commercial mortgage and asset-backed securities [Member]
Amortized Cost
Without single maturity date, Amortized Cost	164,341
Total fixed maturities, Amortized Cost	164,341	151,137
Estimated Fair Value
Without single maturity date, Estimated Fair Value	164,412
Estimated Fair Value	164,412	149,867
Residential mortgage-backed securities [Member]
Amortized Cost
Without single maturity date, Amortized Cost	136,924
Total fixed maturities, Amortized Cost	136,924	110,717
Estimated Fair Value
Without single maturity date, Estimated Fair Value	135,971
Estimated Fair Value	$ 135,971	$ 108,421

Investments Net Investment Inco

Investments Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Components of Net Investment Income [Abstract]
Taxable bonds	$ 3,067	$ 1,761
Tax exempt municipal bonds	1,008	1,085
Cash equivalents and short-term investments	245	260
Dividends on equity securities	521	412
Gross investment income	4,841	3,518
Investment expenses	(326)	(289)
Net investment income	$ 4,515	$ 3,229

Investments Realized Gains (Los

Investments Realized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt and Equity Securities, Realized Gain (Loss) [Abstract]
Realized gains, fixed-maturity securities	$ 371	$ 55
Realized losses, fixed-maturity securities	(79)	0
Net realized gains, fixed-maturity securities	292	55
Realized gains, equity securities	4	57
Realized losses, equity securities	(16)	0
Net realized (losses) gains, equity securities	(12)	57
Net realized investment gains	$ 280	$ 112

Investments Unrealized Gains (L

Investments Unrealized Gains (Losses) on Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Change in unrealized gains (losses), fixed-maturity securities	$ 8.6	$ (6.1)

Investments Investment Narrativ

Investments Investment Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Assets on deposit with state regulatory authorities	$ 6.9	$ 6.9
Payable for investments purchased	$ 22.1

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	$ 605,259	$ 567,962
Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	43,946	39,598
Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	561,313	528,364
Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	0	0
Fixed maturities [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	540,778	510,251
Fixed maturities [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	112	611
Fixed maturities [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	540,666	509,640
Fixed maturities [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
U.S. Treasury securities and obligations of U.S. government agencies [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	112	611
U.S. Treasury securities and obligations of U.S. government agencies [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	112	611
U.S. Treasury securities and obligations of U.S. government agencies [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
U.S. Treasury securities and obligations of U.S. government agencies [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Obligations of states, municipalities and political subdivisions [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	130,160	154,600
Obligations of states, municipalities and political subdivisions [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Obligations of states, municipalities and political subdivisions [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	130,160	154,600
Obligations of states, municipalities and political subdivisions [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Corporate and other securities [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	110,123	96,752
Corporate and other securities [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Corporate and other securities [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	110,123	96,752
Corporate and other securities [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Commercial mortgage and asset-backed securities [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	164,412	149,867
Commercial mortgage and asset-backed securities [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Commercial mortgage and asset-backed securities [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	164,412	149,867
Commercial mortgage and asset-backed securities [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Residential mortgage-backed securities [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	135,971	108,421
Residential mortgage-backed securities [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Residential mortgage-backed securities [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	135,971	108,421
Residential mortgage-backed securities [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value - available for sale	0	0
Equity securities [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	64,481	57,711
Equity securities [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	43,834	38,987
Equity securities [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	20,647	18,724
Equity securities [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	0	0
Exchange traded funds [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	43,834	38,987
Exchange traded funds [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	43,834	38,987
Exchange traded funds [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	0	0
Exchange traded funds [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	0	0
Nonredeemable preferred stock [Member]
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	20,647	18,724
Nonredeemable preferred stock [Member] | Level 1
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	0	0
Nonredeemable preferred stock [Member] | Level 2
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	20,647	18,724
Nonredeemable preferred stock [Member] | Level 3
Fair Value of Investments Measured on Recurring Basis [Line Items]
Fair value	$ 0	$ 0

Fair Value Measurements Narrati

Fair Value Measurements Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers from Level 1 to Level 2	$ 0
Transfers from Level 2 to Level 1	0
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	0	$ 0
Liabilities measured at fair value	$ 0	$ 0

Deferred Policy Acquisition C_3

Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	$ 14,801	$ 11,775
Policy acquisition costs deferred:
Direct commissions deferred	12,363	9,377
Ceding commissions deferred	(3,256)	(2,541)
Other underwriting and policy acquisition costs	965	809
Policy acquisition costs deferred	10,072	7,645
Amortization of net policy acquisition costs	(8,559)	(6,652)
Balance, end of period	$ 16,314	$ 12,768

Underwriting, Acquisition and_3

Underwriting, Acquisition and Insurance Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Underwriting, Acquisition and Insurance Expenses [Abstract]
Gross commissions	$ 10,674	$ 8,379
Ceding commissions	(2,938)	(2,444)
Other operating expenses	7,880	6,463
Underwriting, acquisition, and insurance expenses	15,616	12,398
Salaries, bonuses and employee benefits	$ 6,800	$ 5,000

Stock-based Compensation Narrat

Stock-based Compensation Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.5	$ 0.2
2016 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance	2,073,832

Stock-based Compensation Narr_2

Stock-based Compensation Narrative - Restricted Stock Awards (Details) - Restricted stock [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Unrecognized stock-based compensation expense	$ 3.9
Compensation cost not yet recognized, period	3 years

Stock-based Compensation Restri

Stock-based Compensation Restrictive Stock Awards (Details) - Restricted stock [Member]	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Nonvested Restricted Stock, Number of Shares [Roll Forward]
Nonvested outstanding at the beginning of the period, shares | shares	92,465
Granted, shares | shares	7,020
Vested, shares | shares	(6,666)
Forfeited, shares | shares	(1,305)
Nonvested outstanding at the end of the period, shares | shares	91,514
Nonvested Restricted Stock, Weighted Average Grant Date Fair Value [Abstract]
Nonvested outstanding at the beginning of the period | $ / shares	$ 52.98
Granted | $ / shares	55.56
Vested | $ / shares	45
Forfeited | $ / shares	53.60
Nonvested outstanding at the end of the period | $ / shares	$ 53.75

Stock-based Compensation Narr_3

Stock-based Compensation Narrative - Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	Jul. 27, 2016	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of options exercised		$ 1.9	$ 1
Weighted average exercise price, granted		$ 0
Compensation not yet recognized		$ 0.8
Stock option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, granted	$ 16
Weighted average grant date fair value	$ 2.71
Contractual term	10 years
Vesting period	4 years
Compensation cost not yet recognized, period		1 year 3 months

Stock-based Compensation Stock

Stock-based Compensation Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 27, 2016	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding beginning of period, shares		804,303
Granted, shares		0
Forfeited, shares		(12,600)
Exercised, shares		(37,308)
Outstanding end of period, shares		754,395
Exercisable, shares		302,629
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding beginning of period		$ 16
Granted		0
Forfeited		16
Exercised		16
Outstanding end of period		16
Exercisable end of period		$ 16
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term		7 years 3 months
Exercisable, weighted average remaining contractual term		7 years 3 months
Outstanding, aggregate intrinsic value		$ 39,659
Exercisable, aggregate intrinsic value		$ 15,909
Stock option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free rate of return	1.26%
Dividend yield	1.25%
Expected share price volatility	18.50%
Expected life in years	6 years 3 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted, shares	1,036,916
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Granted	$ 16

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share, [Line Items]
Net income	$ 18,720	$ 7,287
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted average shares outstanding - basic	21,169	21,045
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted average shares outstanding - diluted	21,763	21,628
Earnings Per Share, Basic [Abstract]
Earnings per share - basic	$ 0.88	$ 0.35
Earnings Per Share, Diluted [Abstract]
Earnings per share - diluted	$ 0.86	$ 0.34
Stock option [Member]
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Dilutive effect of shares issued under stock compensation arrangements	568	581
Restricted stock [Member]
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Dilutive effect of shares issued under stock compensation arrangements	26	2

Earnings Per Share Narrative (D

Earnings Per Share Narrative (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	0	0

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended
	Mar. 31, 2019Rate	Mar. 31, 2018Rate
Income Tax Disclosure [Abstract]
Effective tax rate	17.90%	17.30%

Reserves for Unpaid Losses an_3

Reserves for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Net reserves for unpaid losses and loss adjustment expenses, beginning of year	$ 313,763	$ 267,493
Incurred losses and loss adjustment expenses:
Current year	40,128	30,183
Prior years	(6,396)	(1,284)
Total net losses and loss adjustment expenses incurred	33,732	28,899
Payments:
Current year	2,042	340
Prior years	17,955	17,516
Total payments	19,997	17,856
Net reserves for unpaid losses and loss adjustment expenses, end of period	327,498	278,536
Reinsurance recoverable on unpaid losses	57,627	49,673
Gross reserves for unpaid losses and loss adjustment expenses, end of period	$ 385,125	$ 328,209

Reserves for Unpaid Losses an_4

Reserves for Unpaid Losses and Loss Adjustment Expenses Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Claims Development [Line Items]
Adverse (favorable) development on prior year loss reserves	$ (6,396)	$ (1,284)
Accident Year 2015-2018 [Member]
Claims Development [Line Items]
Adverse (favorable) development on prior year loss reserves	$ (6,300)
Accident Year 2017 [Member]
Claims Development [Line Items]
Adverse (favorable) development on prior year loss reserves		(2,500)
Accident Year 2016 [Member]
Claims Development [Line Items]
Adverse (favorable) development on prior year loss reserves		(1,200)
Accident Years 2011 to 2015 [Member]
Claims Development [Line Items]
Adverse (favorable) development on prior year loss reserves		$ 2,400

Reinsurance (Details)

Reinsurance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Premiums Written, Net [Abstract]
Direct written premiums	$ 84,563	$ 63,847
Assumed Premiums Written	63	0
Ceded written premiums	(11,559)	(8,756)
Net written premiums	73,067	55,091
Premiums Earned, Net [Abstract]
Direct earned premiums	72,078	56,593
Assumed Premiums Earned	57	0
Ceded earned premiums	(10,644)	(8,532)
Net earned premiums	61,491	48,061
Ceded incurred losses and loss adjustment expenses	4,300	$ 2,900
Reinsurance recoverables on paid losses	1,700		$ 1,400
Reinsurance recoverables on unpaid losses	$ 57,600		$ 55,400

Other Comprehensive (Loss) In_3

Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains (losses) arising during the period, before income taxes	$ 8,873	$ (6,092)
Income Taxes	(1,863)	1,279
Unrealized gains (losses) arising during the period, net of income tax	7,010	(4,813)
Less reclassification adjustment [Abstract]
Net realized investment gains on fixed-maturity securities, before income taxes	292	55
Income taxes	(62)	(12)
Reclassification adjustment included in net income, net of income taxes	230	43
Other comprehensive income (loss)	$ 6,780	$ (4,856)