10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended March 31, 2018

or

¨ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from _______ to _______

Commission File Number: 001-36777

JAMES RIVER GROUP HOLDINGS, LTD.

(Exact name of registrant as specified in its charter)

Bermuda	98-0585280
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

Wellesley House, 2nd Floor, 90 Pitts Bay Road, Pembroke HM08, Bermuda

(Address of principal executive offices)

(Zip Code)

(441) 278-4580

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes   x    No   ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No   ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x Accelerated filer o Non-accelerated filer o Smaller reporting company o Emerging Growth Company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes   ¨     No   x

Number of shares of the registrant's common shares outstanding at May 1, 2018: 29,866,705

James River Group Holdings, Ltd.

Form 10-Q

Index

		Page Number
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements
	Condensed Consolidated Balance Sheets—March 31, 2018 and December 31, 2017	5
	Condensed Consolidated Statements of Income and Comprehensive (Loss) Income—Three Months Ended March 31, 2018 and 2017	7
	Condensed Consolidated Statements of Changes in Shareholders’ Equity—Three Months Ended March 31, 2018 and 2017	8
	Condensed Consolidated Statements of Cash Flows—Three Months Ended March 31, 2018 and 2017	9
	Notes to Condensed Consolidated Financial Statements	10
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	28
	Critical Accounting Estimates	28
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	47
Item 4.	Controls and Procedures	47
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	47
Item 1A.	Risk Factors	47
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	47
Item 3.	Defaults Upon Senior Securities	47
Item 4.	Mine Safety Disclosure	47
Item 5.	Other Information	47
Item 6.	Exhibits	48
Signatures		49

2

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, or Quarterly Report, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements may be identified by the fact that they do not relate strictly to historical or current facts. You may identify forward-looking statements in this Quarterly Report by the use of words such as “anticipates,” “estimates,” “expects,” “intends,” “plans”, “seeks” and “believes,” and similar expressions or future or conditional verbs such as “will,” “should,” “would,” “may” and “could.” These forward-looking statements include, among others, statements relating to our future financial performance, our business prospects and strategy, anticipated financial position, liquidity and capital needs and other similar matters. These forward-looking statements are based on management’s current expectations and assumptions about future events, which are inherently subject to uncertainties, risks and changes in circumstances that are difficult to predict.

Our actual results may differ materially from those expressed in, or implied by, the forward-looking statements included in this Quarterly Report as a result of various factors, many of which are beyond our control, including, among others:

• the inherent uncertainty of estimating reserves and the possibility that incurred losses may be greater than our loss and loss adjustment expense reserves;

• inaccurate estimates and judgments in our risk management may expose us to greater risks than intended;

• the potential loss of key members of our management team or key employees and our ability to attract and retain personnel;

• adverse economic factors resulting in the sale of fewer policies than expected or an increase in the frequency or severity of claims, or both;

• a decline in our financial strength rating resulting in a reduction of new or renewal business;

• reliance on a select group of brokers and agents for a significant portion of our business and the impact of our potential failure to maintain such relationships;

• reliance on a select group of customers for a significant portion of our business and the impact of our potential failure to maintain such relationships;

• a failure of any of the loss limitations or exclusions we utilize to shield us from unanticipated financial losses or legal exposures, or other liabilities;

• losses from catastrophic events which substantially exceed our expectations and/or exceed the amount of reinsurance we have purchased to protect us from such events;

• potential effects on our business of emerging claim and coverage issues;

• exposure to credit risk, interest rate risk and other market risk in our investment portfolio;

• changes in laws or government regulation, including tax or insurance law and regulations;

• our ability to obtain reinsurance coverage at prices and on terms that allow us to transfer risk and adequately protect our company against financial loss;

• losses resulting from reinsurance counterparties failing to pay us on reinsurance claims or insurance companies with whom we have a fronting arrangement failing to pay us for claims;

• the potential impact of internal or external fraud, operational errors, systems malfunctions or cyber security incidents;

• our ability to manage our growth effectively;

• inadequacy of premiums we charge to compensate us for our losses incurred;

• the recently enacted Public Law No. 115-97, informally titled the Tax Cuts and Jobs Act, may have a significant effect on us including, among other things, by potentially increasing our tax rate, as well as on our shareholders;

• in the event we do not qualify for the insurance company exception to the passive foreign investment company (“PFIC”) rules and are therefore considered a PFIC, there could be material adverse tax consequences to an investor that is subject to U.S. federal income taxation;

• the Company or any of its foreign subsidiaries becoming subject to U.S. federal income taxation;

3

• failure to maintain effective internal controls in accordance with Sarbanes-Oxley Act of 2002, as amended (“Sarbanes-Oxley”); and

• changes in our financial condition, regulations or other factors that may restrict our subsidiaries’ ability to pay us dividends.

Additional information about these risks and uncertainties, as well as others that may cause actual results to differ materially from those in the forward-looking statements, is contained in our filings with the U.S. Securities and Exchange Commission ("SEC"), including our Annual Report on Form 10-K filed with the SEC on March 1, 2018.

Forward-looking statements speak only as of the date of this Quarterly Report. Except as expressly required under federal securities laws and the rules and regulations of the SEC, we do not have any obligation, and do not undertake, to update any forward-looking statements to reflect events or circumstances arising after the date of this Quarterly Report, whether as a result of new information or future events or otherwise. You should not place undue reliance on the forward-looking statements included in this Quarterly Report or that may be made elsewhere from time to time by us, or on our behalf. All forward-looking statements attributable to us are expressly qualified by these cautionary statements.

4

PART 1. FINANCIAL INFORMATION

 Item 1. Financial Statements

JAMES RIVER GROUP HOLDINGS, LTD. AND SUBSIDIARIES

Condensed Consolidated Balance Sheets

	(Unaudited) March 31, 2018		December 31, 2017
	(in thousands)
Assets
Invested assets:
Fixed maturity securities:
Available-for-sale, at fair value (amortized cost:  2018 – $1,054,902; 2017 – $1,008,662)	$	1,043,251	$	1,016,098
Trading, at fair value (amortized cost:  2018 – $3,800; 2017 – $3,801)	3,805		3,808
Equity securities available-for-sale, at fair value (cost:  2018 – $80,464; 2017 – $75,318)	85,957		82,522
Bank loan participations held-for-investment, at amortized cost, net of allowance	257,426		238,214
Short-term investments	26,235		36,804
Other invested assets	74,974		70,208
Total invested assets	1,491,648		1,447,654
Cash and cash equivalents	151,046		163,495
Accrued investment income	8,713		8,381
Premiums receivable and agents’ balances, net	391,456		352,436
Reinsurance recoverable on unpaid losses	331,245		302,524
Reinsurance recoverable on paid losses	16,501		11,292
Prepaid reinsurance premiums	96,141		91,979
Deferred policy acquisition costs	70,769		72,365
Intangible assets, net	38,185		38,334
Goodwill	181,831		181,831
Other assets	84,475		86,404
Total assets	$	2,862,010	$	2,756,695

See accompanying notes.

5

JAMES RIVER GROUP HOLDINGS, LTD. AND SUBSIDIARIES

Condensed Consolidated Balance Sheets (continued)

	(Unaudited) March 31, 2018			December 31, 2017
	(in thousands, except share amounts)
Liabilities and Shareholders’ Equity
Liabilities:
Reserve for losses and loss adjustment expenses	$	1,369,548		$	1,292,349
Unearned premiums	432,248			418,114
Payables to reinsurers	59,138			56,268
Senior debt	98,300			98,300
Junior subordinated debt	104,055			104,055
Accrued expenses	35,138			39,295
Other liabilities	77,813			53,615
Total liabilities	2,176,240			2,061,996
Commitments and contingent liabilities
Shareholders’ equity:
Common Shares – 2018 and 2017: $0.0002 par value; 200,000,000 shares authorized; 29,866,705 and 29,696,682 shares issued and outstanding, respectively	6			6
Preferred Shares – 2018 and 2017: $0.00125 par value; 20,000,000 shares authorized; no shares issued and outstanding	—			—
Additional paid-in capital	639,183			636,149
Retained earnings	58,753			48,198
Accumulated other comprehensive (loss) income	(12,172		)	10,346
Total shareholders’ equity	685,770			694,699
Total liabilities and shareholders’ equity	$	2,862,010		$	2,756,695

See accompanying notes.

6

JAMES RIVER GROUP HOLDINGS, LTD. AND SUBSIDIARIES

Condensed Consolidated Statements of Income and Comprehensive (Loss) Income (Unaudited)

	Three Months Ended March 31,
	2018			2017
	(in thousands, except share amounts)
Revenues
Gross written premiums	$	298,116		$	224,179
Ceded written premiums	(87,138		)	(66,269		)
Net written premiums	210,978			157,910
Change in net unearned premiums	(10,036		)	(3,223		)
Net earned premiums	200,942			154,687
Net investment income	13,256			16,733
Net realized and unrealized (losses) gains on investments	(810		)	1,047
Other income	4,956			3,935
Total revenues	218,344			176,402
Expenses
Losses and loss adjustment expenses	143,772			105,369
Other operating expenses	54,783			48,893
Other expenses	4			(114		)
Interest expense	2,522			2,123
Amortization of intangible assets	149			149
Total expenses	201,230			156,420
Income before taxes	17,114			19,982
Income tax expense	1,481			1,532
Net income	15,633			18,450
Other comprehensive (loss) income:
Net unrealized (losses) gains, net of taxes of $(544) in 2018 and $1,514 in 2017	(18,547		)	4,034
Total comprehensive (loss) income	$	(2,914	)	$	22,484
Per share data:
Basic earnings per share	$	0.53		$	0.63
Diluted earnings per share	$	0.52		$	0.61
Dividend declared per share	$	0.30		$	0.30
Weighted-average common shares outstanding:
Basic	29,764,320			29,289,588
Diluted	30,193,303			30,327,423

See accompanying notes.

7

JAMES RIVER GROUP HOLDINGS, LTD. AND SUBSIDIARIES

Condensed Consolidated Statements of Changes in Shareholders’ Equity (Unaudited)

	Number of Common Shares Outstanding	Class A Common Stock		Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income			Total
	(in thousands, except share amounts)
Balances at December 31, 2016	29,257,566	$	6	$	636,856		$	55,232		$	1,127		$	693,221
Net income	—	—		—			18,450			—			18,450
Other comprehensive income	—	—		—			—			4,034			4,034
Dividends	—	—		—			(8,810		)	—			(8,810		)
Exercise of stock options	63,467	—		198			—			—			198
Vesting of RSUs	23,294	—		(627		)	—			—			(627		)
Compensation expense under share incentive plans	—	—		1,794			—			—			1,794
Balances at March 31, 2017	29,344,327	$	6	$	638,221		$	64,872		$	5,161		$	708,260
Balances at December 31, 2017	29,696,682	$	6	$	636,149		$	48,198		$	10,346		$	694,699
Net income	—	—		—			15,633			—			15,633
Other comprehensive loss	—	—		—			—			(18,547		)	(18,547		)
Dividends	—	—		—			(9,049		)	—			(9,049		)
Exercise of stock options	127,196	—		2,355			—			—			2,355
Vesting of RSUs	42,827	—		(776		)	—			—			(776		)
Compensation expense under share incentive plans	—	—		1,455			—			—			1,455
Cumulative effect of adoption of ASU No. 2016-01, net of taxes	—	—		—			4,682			(4,682		)	—
Cumulative effect of adoption of ASU No. 2018-02	—	—		—			(711		)	711			—
Balances at March 31, 2018	29,866,705	$	6	$	639,183		$	58,753		$	(12,172	)	$	685,770

See accompanying notes.

8

JAMES RIVER GROUP HOLDINGS, LTD. AND SUBSIDIARIES

Condensed Consolidated Statements of Cash Flows (Unaudited)

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Operating activities
Net cash provided by operating activities	$	48,461		$	16,112
Investing activities
Securities available-for-sale:
Purchases – fixed maturity securities	(118,652		)	(46,276		)
Sales – fixed maturity securities	26,392			32,148
Maturities and calls – fixed maturity securities	45,245			15,406
Purchases – equity securities	(5,949		)	—
Sales – equity securities	766			409
Bank loan participations:
Purchases	(66,059		)	(75,983		)
Sales	35,708			37,462
Maturities	11,427			18,840
Other invested assets:
Purchases	(4,992		)	(250		)
Short-term investments, net	10,569			(2,517		)
Securities receivable or payable, net	12,576			(336		)
Purchases of property and equipment	(275		)	(970		)
Net cash used in investing activities	(53,244		)	(22,067		)
Financing activities
Dividends paid	(9,074		)	(8,885		)
Issuance of common shares under equity incentive plans	2,862			303
Common share repurchases	(1,283		)	(732		)
Repayments of financing obligations net of proceeds	(171		)	(291		)
Net cash used in financing activities	(7,666		)	(9,605		)
Change in cash and cash equivalents	(12,449		)	(15,560		)
Cash and cash equivalents at beginning of period	163,495			109,784
Cash and cash equivalents at end of period	$	151,046		$	94,224
Supplemental information
Interest paid	$	2,509		$	2,101

See accompanying notes.

9

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements

1.    Accounting Policies

Organization

James River Group Holdings, Ltd. (referred to as “JRG Holdings” or, with its subsidiaries, the “Company”) is an exempted holding company registered in Bermuda, organized for the purpose of acquiring and managing insurance and reinsurance entities.

The Company owns six insurance companies based in the United States (“U.S.”) focused on specialty insurance niches and two Bermuda-based reinsurance companies as described below:

• James River Group Holdings UK Limited (“James River UK”) is an insurance holding company formed in 2015 in the United Kingdom (“U.K.”). JRG Holdings contributed James River Group, Inc. (“James River Group”), a U.S. insurance holding company, to James River UK in 2015.

• James River Group is a Delaware domiciled insurance holding company formed in 2002 which owns all of the Company’s U.S.-based subsidiaries, either directly or indirectly through one of its wholly-owned U.S. subsidiaries. James River Group oversees the Company’s U.S. insurance operations and maintains all of the outstanding debt in the U.S.

• James River Insurance Company is an Ohio domiciled excess and surplus lines insurance company that, with its wholly-owned insurance subsidiary, James River Casualty Company, is authorized to write business in every state and the District of Columbia.

• Falls Lake National Insurance Company (“Falls Lake National”) is an Ohio domiciled insurance company which wholly owns Stonewood Insurance Company (“Stonewood Insurance”), a North Carolina domiciled company, Falls Lake General Insurance Company, an Ohio domiciled company, and Falls Lake Fire and Casualty Company, a California domiciled company. Falls Lake National began writing specialty admitted fronting and program business in late 2013. Falls Lake Fire and Casualty began operations in 2016.

• JRG Reinsurance Company Ltd. (“JRG Re”) was formed in 2007 and commenced operations in 2008. JRG Re, a Bermuda domiciled reinsurer, primarily provides non-catastrophe casualty reinsurance to U.S. third parties.

• Carolina Re Ltd (“Carolina Re”) was formed in 2018 and provides reinsurance to the Company’s U.S.-based insurance subsidiaries. Carolina Re has entered into a stop loss reinsurance treaty with JRG Re.

Basis of Presentation

The accompanying condensed consolidated financial statements and notes have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated financial statements include the results of the Company and its subsidiaries from their respective dates of inception or acquisition, as applicable. Readers are urged to review the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for a more complete description of the Company’s business and accounting policies. 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. Interim results are not necessarily indicative of results of operations for the full year. The consolidated balance sheet as of December 31, 2017 was derived from the Company’s audited annual consolidated financial statements.

Intercompany transactions and balances have been eliminated.

Estimates and Assumptions

Preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying disclosures. Those estimates are inherently subject to change, and actual results may ultimately differ from those estimates.

Variable Interest Entities

Entities that do not have sufficient equity at risk to allow the entity to finance its activities without additional financial support or in which the equity investors, as a group, do not have the characteristic of a controlling financial interest are referred to as variable interest entities (“VIE”). A VIE is consolidated by the variable interest holder that is determined to have the controlling financial interest (primary beneficiary) as a result of having both the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company determines whether it is the primary beneficiary of an entity subject to consolidation based on a qualitative assessment of the VIE’s capital structure, contractual terms, nature of the VIE’s operations

10

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

and purpose, and the Company’s relative exposure to the related risks of the VIE on the date it becomes initially involved in the VIE. The Company reassesses its VIE determination with respect to an entity on an ongoing basis.

The Company holds interests in VIEs through certain equity method investments included in “other invested assets” in the accompanying condensed consolidated balance sheets. The Company has determined that it should not consolidate any of the VIEs as it is not the primary beneficiary in any of the relationships. Although the investments resulted in the Company holding variable interests in the entities, they did not empower the Company to direct the activities that most significantly impact the economic performance of the entities. The Company’s investments related to these VIEs totaled $32.6 million and $32.1 million as of March 31, 2018 and December 31, 2017, respectively, representing the Company’s maximum exposure to loss.

Income Tax Expense

Our effective tax rate fluctuates from period to period based on the relative mix of income reported by country and the respective tax rates imposed by each tax jurisdiction. For the three months ended March 31, 2018 and 2017, our U.S. federal income tax expense was 8.7% and 7.7% of income before taxes, respectively. For U.S.-sourced income, the Company’s U.S. federal income tax expense differs from the amounts computed by applying the federal statutory income tax rate (21% in 2018 and 35% in 2017) to income before taxes due primarily to interest income on tax-advantaged state and municipal securities (state and municipal securities represent 12.4% and 10.9% of our available-for-sale securities at March 31, 2018 and 2017, respectively), dividends received income, and excess tax benefits on share based compensation.

Financial results reflect provisional amounts related to the December 2017 enactment of the Tax Cuts and Jobs Act of 2017 (“TCJA”). These provisional estimates are based on the Company’s initial analysis and current interpretation of the legislation. Given the complexity of the legislation, anticipated guidance from the U.S. Treasury, and the potential for additional guidance from the SEC or the Financial Accounting Standards Board (“FASB”), these estimates may be adjusted during 2018.

Adopted Accounting Standards

Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance applies to all companies that either enter into contracts with customers to transfer goods or services or enter into contracts for the transfer of nonfinancial assets, unless those contracts are within the scope of other standards, such as insurance contracts. Under this guidance, a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Judgments required in adopting this update may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The adoption of ASU 2014-09 had no impact on reported fee income and there was no cumulative effect of initially applying the update.

Effective January 1, 2018, the Company adopted ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. Among other things, this ASU requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. Upon adoption on January 1, 2018, the Company made a $4.7 million cumulative-effect adjustment to increase retained earnings and reduce accumulated other comprehensive income. The adoption of ASU 2016-01 did not materially impact the Company's financial position, cash flows, or total comprehensive income. The Company's results of operations were impacted as changes in fair value of equity instruments are now presented in net income rather than other comprehensive (loss) income. For the three months ended March 31, 2018, the impact was a $1.4 million reduction in net income and a $0.05 reduction in basic and diluted earnings per share.

Effective January 1, 2018, the Company adopted ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This update was issued as a result of the enactment of the TCJA on December 22, 2017. The ASU allows for the option to reclassify the stranded tax effects resulting from the implementation of the TCJA out of accumulated other comprehensive income and into retained earnings. As the adoption of ASU 2016-01 in 2018 resulted in the reclassification of the entire unrealized balance on equity securities from accumulated other comprehensive income into retained earnings, only the stranded tax effects on the unrealized balances of fixed income securities were impacted by the adoption of ASU 2018-02. The reclassification resulted in a $711,000 decrease to the Company's retained earnings with a corresponding increase to accumulated other comprehensive income in the first quarter of 2018.

11

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

Prospective Accounting Standards

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend beyond 12 months. This ASU is effective for annual and interim reporting periods beginning after December 15, 2018. Upon adoption, leases will be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. The Company is currently evaluating ASU 2016-02 to determine the potential impact that adopting this standard will have on its financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of 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 financial assets measured at amortized cost, such as bank loan participations held for investment, 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, with the amount of the allowance limited to the amount by which fair value is below amortized cost. This ASU is effective for annual and interim reporting periods beginning after December 15, 2019. Upon adoption, this ASU 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 has not yet completed the analysis of how adopting this ASU will affect the Company’s financial statements.

12

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

2.    Investments

The Company’s available-for-sale investments are summarized as follows:

	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
March 31, 2018
Fixed maturity securities:
State and municipal	$	137,478	$	4,029	$	(1,782	)	$	139,725
Residential mortgage-backed	186,279		509		(5,690		)	181,098
Corporate	445,058		3,054		(8,486		)	439,626
Commercial mortgage and asset-backed	192,941		173		(2,310		)	190,804
Obligations of U.S. government corporations and agencies	7,804		—		(29		)	7,775
U.S. Treasury securities and obligations guaranteed by the U.S. government	83,317		73		(1,171		)	82,219
Redeemable preferred stock	2,025		—		(21		)	2,004
Total fixed maturity securities	1,054,902		7,838		(19,489		)	1,043,251
Equity securities	80,464		6,845		(1,352		)	85,957
Total investments available-for-sale	$	1,135,366	$	14,683	$	(20,841	)	$	1,129,208
December 31, 2017
Fixed maturity securities:
State and municipal	$	139,382	$	5,587	$	(603	)	$	144,366
Residential mortgage-backed	160,379		723		(2,441		)	158,661
Corporate	408,857		7,503		(2,639		)	413,721
Commercial mortgage and asset-backed	182,595		714		(698		)	182,611
Obligations of U.S. government corporations and agencies	35,948		—		(101		)	35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government	79,476		37		(639		)	78,874
Redeemable preferred stock	2,025		—		(7		)	2,018
Total fixed maturity securities	1,008,662		14,564		(7,128		)	1,016,098
Equity securities	75,318		7,830		(626		)	82,522
Total investments available-for-sale	$	1,083,980	$	22,394	$	(7,754	)	$	1,098,620

The amortized cost and fair value of available-for-sale investments in fixed maturity securities at March 31, 2018 are summarized, by contractual maturity, as follows:

	Cost or Amortized Cost		Fair Value
	(in thousands)
One year or less	$	33,850	$	33,743
After one year through five years	327,069		323,368
After five years through ten years	185,400		181,026
After ten years	127,338		131,208
Residential mortgage-backed	186,279		181,098
Commercial mortgage and asset-backed	192,941		190,804
Redeemable preferred stock	2,025		2,004
Total	$	1,054,902	$	1,043,251

Actual maturities may differ for some securities because borrowers have the right to call or prepay obligations with or without penalties.

13

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

The following table shows the Company’s gross unrealized losses and fair value for available-for-sale securities aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position:

	Less Than 12 Months					12 Months or More					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
March 31, 2018
Fixed maturity securities:
State and municipal	$	61,275	$	(1,325	)	$	10,454	$	(457	)	$	71,729	$	(1,782	)
Residential mortgage-backed	90,188		(1,743		)	79,455		(3,947		)	169,643		(5,690		)
Corporate	260,523		(5,309		)	64,506		(3,177		)	325,029		(8,486		)
Commercial mortgage and asset-backed	94,429		(1,578		)	22,658		(732		)	117,087		(2,310		)
Obligations of U.S. government corporations and agencies	—		—			7,775		(29		)	7,775		(29		)
U.S. Treasury securities and obligations guaranteed by the U.S. government	53,118		(913		)	18,080		(258		)	71,198		(1,171		)
Redeemable preferred stock	2,004		(21		)	—		—			2,004		(21		)
Total fixed maturity securities	561,537		(10,889		)	202,928		(8,600		)	764,465		(19,489		)
Equity securities	17,816		(811		)	5,685		(541		)	23,501		(1,352		)
Total investments available-for-sale	$	579,353	$	(11,700	)	$	208,613	$	(9,141	)	$	787,966	$	(20,841	)
December 31, 2017
Fixed maturity securities:
State and municipal	$	40,117	$	(318	)	$	10,662	$	(285	)	$	50,779	$	(603	)
Residential mortgage-backed	50,447		(261		)	84,193		(2,180		)	134,640		(2,441		)
Corporate	113,464		(846		)	66,954		(1,793		)	180,418		(2,639		)
Commercial mortgage and asset-backed	53,965		(244		)	25,299		(454		)	79,264		(698		)
Obligations of U.S. government corporations and agencies	3,024		(1		)	32,154		(100		)	35,178		(101		)
U.S. Treasury securities and obligations guaranteed by the U.S. government	50,760		(430		)	26,707		(209		)	77,467		(639		)
Redeemable preferred stock	2,018		(7		)	—		—			2,018		(7		)
Total fixed maturity securities	313,795		(2,107		)	245,969		(5,021		)	559,764		(7,128		)
Equity securities	5,859		(65		)	5,665		(561		)	11,524		(626		)
Total investments available-for-sale	$	319,654	$	(2,172	)	$	251,634	$	(5,582	)	$	571,288	$	(7,754	)

The Company held securities of 205 issuers that were in an unrealized loss position at March 31, 2018 with a total fair value of $788.0 million and gross unrealized losses of $20.8 million. None of the fixed maturity securities with unrealized losses has ever missed, or been delinquent on, a scheduled principal or interest payment.

At March 31, 2018, 99.9% of the Company’s fixed maturity security portfolio was rated “BBB-” or better (“investment grade”) by Standard & Poor’s or received an equivalent rating from another nationally recognized rating agency. Fixed maturity securities with ratings below investment grade by Standard & Poor’s or another nationally recognized rating agency at March 31, 2018 had an aggregate fair value of $868,000 and an aggregate net unrealized loss of $26,000.

Management concluded that none of the fixed maturity securities with an unrealized loss at March 31, 2018 or December 31, 2017 experienced an other-than-temporary impairment. Management does not intend to sell available-for-sale securities in an unrealized loss position, and it is not “more likely than not” that the Company will be required to sell these securities before a recovery in their value to their amortized cost basis occurs.

At December 31, 2017, management concluded that one equity security, based on the severity and duration of the impairment, had experienced an other-than-temporary impairment. Accordingly, the Company recorded an impairment loss of $1.5 million in 2017. Management concluded that none of the other equity securities with an unrealized loss at December 31, 2017 experienced an other-than-temporary impairment.

14

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

At December 31, 2017, the Company held a participation in a loan with unpaid principal of $807,000 issued by a company that produces and supplies power to Puerto Rico through a power purchase agreement with Puerto Rico Electric Power Authority (“PREPA”), a public corporation and governmental agency of the Commonwealth of Puerto Rico. Management concluded that an allowance for credit losses should be established on the loan at December 31, 2017 to reduce its carrying value to $0. In the first quarter of 2018, the full outstanding principal on the loan was repaid and the Company recognized a realized gain of $807,000 on the repayment.

The Company’s bank loan portfolio includes loans to oil and gas companies in the energy sector. The market values of these loans were previously impacted by declining energy prices. At March 31, 2018, the Company’s oil and gas exposure in the bank loan portfolio was in three loans with a carrying value of $4.7 million and an unrealized loss of $143,000. All of the loans were current at March 31, 2018. Management concluded that two of these loans were impaired as of March 31, 2018. At March 31, 2018, the two impaired loans had a carrying value of $1.7 million, unpaid principal of $2.1 million and an allowance for credit losses of $300,000. At December 31, 2017, three loans were impaired with a carrying value of $4.6 million, unpaid principal of $6.9 million and an allowance for credit losses of $2.3 million.

Management concluded that one non-energy sector loan was impaired at December 31, 2017. At December 31, 2017, the impaired loan had a carrying value of $561,000, unpaid principal of $706,000, and an allowance for credit losses of $145,000.

The aggregate allowance for credit losses was $300,000 at March 31, 2018 on impaired loans from two issuers with a total carrying value of $1.7 million and unpaid principal of $2.1 million. At December 31, 2017, the aggregate allowance for credit losses was $3.2 million on impaired loans from five issuers with a total carrying value of $5.1 million and unpaid principal of $8.4 million. The aggregate allowance for credit losses on impaired loans was $639,000 at March 31, 2017 and $943,000 at December 31, 2016.

Bank loan participations generally have a credit rating that is below investment grade (i.e. below “BBB-” for Standard & Poor’s) at the date of purchase. These bank loans are primarily senior, secured floating-rate debt rated “BB”, “B”, or “CCC” by Standard & Poor’s or an equivalent rating from another nationally recognized rating agency. These bank loans include assignments of, and participations in, performing and non-performing senior corporate debt generally acquired through primary bank syndications and in secondary markets. Bank loans consist of, but are not limited to, term loans, the funded and unfunded portions of revolving credit loans, and other similar loans and investments. Management believed that it was probable at the time that these loans were acquired that the Company would be able to collect all contractually required payments receivable.

Generally, the accrual of interest on a bank loan participation is discontinued when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about further collectability of principal or interest. A bank loan participation may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. Generally, bank loan participations are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Interest received on nonaccrual loans generally is reported as investment income. There were no bank loans on nonaccrual status at March 31, 2018 or December 31, 2017.

The allowance for credit losses is maintained at a level believed adequate by management to absorb estimated probable credit losses. Management’s periodic evaluation of the adequacy of the allowance is based on consultations and advice of the Company’s independent investment manager, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, current economic conditions, and other relevant factors. The Company generally records an allowance equal to the difference between the fair value and the amortized cost of bank loans that it has determined to be impaired as a practical expedient for an estimate of probable future cash flows to be collected on those bank loans. Bank loans are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.

The average recorded investment in impaired bank loans was $3.4 million and $5.3 million during the three months ended March 31, 2018 and 2017, respectively. Investment income of $20,000 and $84,000, respectively, was recognized during the time within those periods that the loans were impaired. The Company recorded net realized investment gains of $3,000 and $177,000 in the three months ended March 31, 2018 and 2017, respectively, for changes in the fair value of impaired bank loans.

Changes in unrealized gains or losses on securities held for trading are recorded as trading gains or losses within net investment income. Net investment income for the three months ended March 31, 2018 includes $3,000 of net trading losses, all relating to securities still held at March 31, 2018.

15

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

The Company’s realized gains and losses are summarized as follows:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Fixed maturity securities:
Gross realized gains	$	22		$	338
Gross realized losses	(223		)	(296		)
	(201		)	42
Bank loan participations:
Gross realized gains	1,220			1,136
Gross realized losses	(100		)	(539		)
	1,120			597
Equity securities:
Gross realized gains	—			409
Gross realized losses	(15		)	—
Changes in fair values of equity securities	(1,710		)	—
	(1,725		)	409
Short-term investments and other:
Gross realized gains	—			—
Gross realized losses	(4		)	(1		)
	(4		)	(1		)
Total	$	(810	)	$	1,047

Realized investment gains or losses are determined on a specific identification basis. 

The Company invests selectively in private debt and equity opportunities. These investments, which together comprise the Company’s other invested assets, are primarily focused in renewable energy, limited partnerships, and bank holding companies.

	Carrying Value				Investment Income
	March 31,		December 31,		Three Months Ended March 31,
	2018		2017		2018		2017
	(in thousands)
Renewable energy LLCs (a)	$	32,592	$	32,063	$	1,211	$	5,594
Renewable energy notes receivable (b)	8,750		7,278		297		—
Limited partnerships (c)	29,132		26,367		226		382
Bank holding companies (d)	4,500		4,500		86		86
Total other invested assets	$	74,974	$	70,208	$	1,820	$	6,062

(a) The Company’s Corporate and Other segment owns equity interests ranging from 2.6% to 32.8% in various LLCs whose principal objective is capital appreciation and income generation from owning and operating renewable energy production facilities (wind and solar). The LLCs are managed by an affiliate of the Company’s largest shareholder and the Company’s Non-Exucitive Chairman has invested in certain of these LLCs. The equity method is used to account for the Company’s LLC investments. Income for the LLCs primarily reflects adjustments to the carrying values of investments in renewable energy projects to their determined fair values. The fair value adjustments are included in revenues for the LLCs. Expenses for the LLCs are not significant and are comprised of administrative and interest expenses. The Company received cash distributions from these investments totaling $1.2 million and $1.6 million in the three months ended March 31, 2018 and 2017, respectively.

(b) The Company has invested in notes receivable for renewable energy projects. At March 31, 2018, the Company holds an $8.8 million note issued by an affiliate of the Company’s largest shareholder. Interest on the note, which matures in 2021, is fixed at 15.0%. Interest income on the note was $297,000 for the three months ended March 31, 2018.

16

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

(c) The Company owns investments in limited partnerships that invest in concentrated portfolios including publicly-traded small cap equities, loans of middle market private equity sponsored companies, equity tranches of collateralized loan obligations (“CLOs”), and tranches of distressed home loans. Income from the partnerships is recognized under the equity method of accounting. The Company’s Corporate and Other segment held an investment in a limited partnership with a carrying value of $2.9 million at March 31, 2018. The Company recognized investment losses of $125,000 and investment income of $68,000 on the investment for the three months ended March 31, 2018 and 2017, respectively. The Company’s Excess and Surplus Lines segment holds investments in limited partnerships of $26.3 million at March 31, 2018. Investment income of $351,000 and $314,000 was recognized on the investments for the three months ended March 31, 2018 and 2017, respectively. At March 31, 2018, the Company’s Excess and Surplus Lines segment has outstanding commitments to invest another $2.6 million in these limited partnerships.

(d) The Company holds $4.5 million of subordinated notes issued by a bank holding company. Interest on the notes, which mature on August 12, 2023, is fixed at 7.6% per annum. Interest income on the notes was $86,000 in both three months ended March 31, 2018 and 2017. The Company’s Chairman was previously the Lead Independent Director of the bank holding company and an investor in the bank holding company. Additionally, one of the Company’s directors was an investor in the bank holding company and is currently a lender to the bank holding company.

At March 31, 2018, the Company held an investment in a CLO where one of the underlying loans was issued by the bank holding company. The investment, with a carrying value of $4.7 million at March 31, 2018, is classified as an available-for-sale fixed maturity.

The Company previously held common shares issued by the bank holding company. Realized investments gains of $409,000 were recognized in the three months ended March 31, 2017 related to the sale of common shares of the bank holding company.

The Company holds a $1.0 million certificate of deposit issued by the bank holding company. The certificate of deposit, which matures on December 19, 2018, is carried as a short-term investment. Interest income of $0 and $1,000 was recognized on this investment for the three months ended March 31, 2018 and 2017, respectively.

3.    Goodwill and Intangible Assets

On December 11, 2007, the Company completed an acquisition of James River Group by acquiring 100% of the outstanding shares of James River Group common stock, referred to herein as the “Merger”. The transaction was accounted for under the purchase method of accounting, and goodwill and intangible assets were recognized by the Company as a result of the transaction. Goodwill resulting from the Merger was $181.8 million at March 31, 2018 and December 31, 2017.

The gross carrying amounts and accumulated amortization for each major specifically identifiable intangible asset class were as follows: 

		March 31, 2018				December 31, 2017
	Life (Years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
		($ in thousands)
Intangible Assets
Trademarks	Indefinite	$	22,200	$	—	$	22,200	$	—
Insurance licenses and authorities	Indefinite	9,164		—		9,164		—
Identifiable intangibles not subject to amortization		31,364		—		31,364		—
Broker relationships	24.6	11,611		4,790		11,611		4,641
Identifiable intangible assets subject to amortization		11,611		4,790		11,611		4,641
		$	42,975	$	4,790	$	42,975	$	4,641

17

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

4.    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 condensed consolidated financial statements:

	Three Months Ended March 31,
	2018			2017
	(in thousands, except share and per share amounts)
Net income to shareholders	$	15,633		$	18,450
Weighted average common shares outstanding:
Basic	29,764,320			29,289,588
Common share equivalents	428,983			1,037,835
Diluted	30,193,303			30,327,423
Earnings per share:
Basic	$	0.53		$	0.63
Common share equivalents	(0.01		)	(0.02		)
Diluted	$	0.52		$	0.61

Common share equivalents relate to stock options and restricted share units (“RSU’s”). For the three months ended March 31, 2018 and 2017, common share equivalents of 192,817 and 97,755 shares, respectively, were excluded from the calculations of diluted earnings per share as their effects were anti-dilutive.

5.    Reserve for Losses and Loss Adjustment Expenses

The following table provides a reconciliation of the beginning and ending reserve balances for losses and loss adjustment expenses, net of reinsurance, to the gross amounts reported in the condensed consolidated balance sheets:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at beginning of period	$	989,825		$	761,128
Add: Incurred losses and loss adjustment expenses net of reinsurance:
Current year	146,382			108,783
Prior years	(2,610		)	(3,414		)
Total incurred losses and loss and adjustment expenses	143,772			105,369
Deduct: Loss and loss adjustment expense payments net of reinsurance:
Current year	12,177			3,698
Prior years	83,117			71,018
Total loss and loss adjustment expense payments	95,294			74,716
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at end of period	1,038,303			791,781
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	331,245			188,782
Reserve for losses and loss adjustment expenses gross of reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	$	1,369,548		$	980,563

18

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

The Company experienced $2.6 million of favorable reserve development in the three months ended March 31, 2018 on the reserve for losses and loss adjustment expenses held at December 31, 2017. This reserve development included $1.1 million of favorable development in the Excess and Surplus Lines segment, primarily from the 2016 and 2017 accident years. This favorable development occurred because our actuarial studies at March 31, 2018 for the Excess and Surplus Lines segment indicated that our loss experience on our casualty business continues to be below our initial expected loss ratios. The Specialty Admitted Insurance segment experienced $1.3 million of favorable development, primarily due to favorable development in the workers' compensation business for the 2014 through 2016 accident years. The Company also experienced $176,000 of favorable development in the Casualty Reinsurance segment.

The Company experienced $3.4 million of favorable reserve development in the three months ended March 31, 2017 on the reserve for losses and loss adjustment expenses held at December 31, 2016. This reserve development included $3.2 million of favorable development in the Excess and Surplus Lines segment, primarily from the 2016 and 2014 accident years which were partially offset by adverse development in the 2006 accident year. This favorable development occurred because our actuarial studies at March 31, 2017 for the Excess and Surplus Lines segment indicated that our loss experience on our casualty business continues to be below our initial expected loss ratios. In addition, the Specialty Admitted Insurance segment experienced $42,000 of favorable development and the Casualty Reinsurance segment experienced $145,000 of favorable development.

6.    Other Comprehensive (Loss) Income

The following table summarizes the components of other comprehensive income:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Unrealized (losses) gains arising during the period, before U.S. income taxes	$	(19,292	)	$	5,998
U.S. income taxes	544			(1,636		)
Unrealized (losses) gains arising during the period, net of  U.S. income taxes	(18,748		)	4,362
Less reclassification adjustment:
Net realized investment (losses) gains	(201		)	450
U.S. income tax expenses	—			(122		)
Reclassification adjustment for investment (losses) gains realized in net income	(201		)	328
Other comprehensive (loss) income	$	(18,547	)	$	4,034

7.       Contingent Liabilities

The Company is a party to various lawsuits arising in the ordinary course of its operations. The Company believes that the ultimate resolution of these matters will not materially impact its financial position, cash flows, or results of operations.

The Company’s reinsurance subsidiary, JRG Re, has entered into three letter of credit facilities with banks as security to third-party reinsureds on reinsurance assumed by JRG Re. JRG Re has established custodial accounts to secure these letters of credit. Under a $100.0 million facility, $52.2 million of letters of credit were issued through March 31, 2018 which were secured by deposits of $64.2 million. Under a $102.5 million facility, $98.6 million of letters of credit were issued through March 31, 2018 which were secured by deposits of $125.9 million. Under a $100.0 million facility, $6.9 million of letters of credit were issued through March 31, 2018 which were secured by deposits of $10.0 million. JRG Re has also established trust accounts to secure its obligations to selected reinsureds. The total amount deposited in the trust accounts for the benefit of third-party reinsureds was $283.1 million at March 31, 2018.

The Company is also exposed to credit risk relating to a set of insurance contracts with an insured group of companies under which the Company pays losses and loss adjustment expenses on the contract. The Company has indemnity agreements with this group of insured parties (non-insurance entities) and is contractually entitled to receive reimbursement for a significant portion of the losses and loss adjustment expenses paid on behalf of the insured parties and other expenses incurred by the Company. The insured parties are required to collateralize all amounts currently due to the Company and to provide additional collateral sufficient to cover the amounts that may be recoverable under the indemnity agreement, including among other things case loss and loss adjustment expense reserves, IBNR loss and loss adjustment expense reserves, extra contractual obligations and excess of policy limits liabilities. This collateral is currently provided through a collateral trust arrangement established in favor of the Company by a captive insurance company affiliate of the insured group. At March 31, 2018, the cash equivalent collateral held in the collateral trust arrangement was approximately $860.6 million, which exceeds the amount of claims receivable and unpaid reported losses

19

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

and loss adjustment expenses outstanding. This is a rapidly growing relationship, and as such, there is ongoing exposure to estimated losses and expenses on these contracts growing at a faster pace than growth in our collateral balances. In addition, we have credit exposure if our estimates of future losses and loss adjustment expenses and other amounts recoverable, which are the basis for establishing collateral balances, are lower than actual amounts paid or payable. The amount of our credit exposure in any of these instances could be material. To mitigate these risks, we closely and frequently monitor our exposure compared to our collateral held, and we request additional collateral when our analysis indicates that we have uncollateralized exposure.

8.    Segment Information

The Company has four reportable segments: the Excess and Surplus Lines segment, the Specialty Admitted Insurance segment, the Casualty Reinsurance segment, and the Corporate and Other segment. Segment profit (loss) is measured by underwriting profit (loss), which is generally defined as net earned premiums less loss and loss adjustment expenses and other operating expenses of the operating segments. Gross fee income of the Excess and Surplus Lines segment is included in that segment’s underwriting profit. For the three months ended March 31, 2018 and 2017, gross fee income of $4.8 million and $3.8 million, respectively, was included in underwriting profit. Segment results are reported prior to the effects of intercompany reinsurance agreements among the Company’s insurance subsidiaries.

The following table summarizes the Company’s segment results:

	Excess and Surplus Lines		Specialty Admitted Insurance		Casualty Reinsurance		Corporate and Other		Total
	(in thousands)
Three Months Ended March 31, 2018
Gross written premiums	$	167,486	$	87,401	$	43,229	$	—	$	298,116
Net earned premiums	129,971		13,340		57,631		—		200,942
Underwriting profit of insurance segments	11,299		1,623		1,744		—		14,666
Net investment income	3,042		711		8,017		1,486		13,256
Interest expense	—		—		—		2,522		2,522
Segment revenues	137,327		13,955		65,526		1,536		218,344
Segment goodwill	181,831		—		—		—		181,831
Segment assets	909,963		495,096		1,368,872		88,079		2,862,010
Three Months Ended March 31, 2017
Gross written premiums	$	108,995	$	72,464	$	42,720	$	—	$	224,179
Net earned premiums	93,849		16,253		44,585		—		154,687
Underwriting profit of insurance segments	8,800		842		1,093		—		10,735
Net investment income	3,183		636		7,124		5,790		16,733
Interest expense	—		—		—		2,123		2,123
Segment revenues	101,090		16,924		52,146		6,242		176,402
Segment goodwill	181,831		—		—		—		181,831
Segment assets	749,617		335,806		1,211,896		114,006		2,411,325

20

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

The following table reconciles the underwriting profit of the operating segments by individual segment to consolidated income before taxes:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Underwriting profit of the insurance segments:
Excess and Surplus Lines	$	11,299		$	8,800
Specialty Admitted Insurance	1,623			842
Casualty Reinsurance	1,744			1,093
Total underwriting profit of insurance segments	14,666			10,735
Other operating expenses of the Corporate and Other segment	(7,431		)	(6,461		)
Underwriting profit	7,235			4,274
Net investment income	13,256			16,733
Net realized investment (losses) gains	(810		)	1,047
Amortization of intangible assets	(149		)	(149		)
Other income and expenses	104			200
Interest expense	(2,522		)	(2,123		)
Income before taxes	$	17,114		$	19,982

9.    Other Operating Expenses and Other Expenses

Other operating expenses consist of the following:

	Three Months Ended March 31,
	2018		2017
	(in thousands)
Amortization of policy acquisition costs	$	30,198	$	27,638
Other underwriting expenses of the operating segments	17,154		14,794
Other operating expenses of the Corporate and Other segment	7,431		6,461
Total	$	54,783	$	48,893

10.    Fair Value Measurements

Three levels of inputs are used to measure fair value of financial instruments: (1) Level 1: quoted price (unadjusted) in active markets for identical assets, (2) Level 2: inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the instrument, and (3) Level 3: inputs to the valuation methodology are unobservable for the asset or liability.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date.

To measure fair value, the Company obtains quoted market prices for its investment securities from its outside investment managers. If a quoted market price is not available, the Company uses prices of similar securities. Values for U.S. Treasury and publicly-traded equity securities are generally based on Level 1 inputs which use the market approach valuation technique. The values for all other fixed maturity securities (including state and municipal securities and obligations of U.S. government corporations and agencies) generally incorporate significant Level 2 inputs, and in some cases, Level 3 inputs, using the market approach and income approach valuation techniques. There have been no changes in the Company’s use of valuation techniques since December 31, 2016.

The Company reviews fair value prices provided by its outside investment managers for reasonableness by comparing the fair values provided by the managers to those provided by its investment custodian. The Company also reviews and monitors changes in unrealized gains and losses. The Company has not historically adjusted security prices. The Company obtains an understanding of the methods, models and inputs used by the investment managers and independent pricing services, and controls

21

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

are in place to validate that prices provided represent fair values. The Company’s control process includes, but is not limited to, initial and ongoing evaluation of the methodologies used, a review of specific securities and an assessment for proper classification within the fair value hierarchy, and obtaining and reviewing internal control reports for our investment manager that obtains fair values from independent pricing services.

 Assets measured at fair value on a recurring basis as of March 31, 2018 are summarized below:

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
Available-for-sale securities:
Fixed maturity securities:
State and municipal	$	—	$	139,725	$	—	$	139,725
Residential mortgage-backed	—		181,098		—		181,098
Corporate	—		439,626		—		439,626
Commercial mortgage and asset-backed	—		186,124		4,680		190,804
Obligations of U.S. government corporations and agencies	—		7,775		—		7,775
U.S. Treasury securities and obligations guaranteed by the U.S. government	81,640		579		—		82,219
Redeemable preferred stock	—		2,004		—		2,004
Total fixed maturity securities	81,640		956,931		4,680		1,043,251
Equity securities:
Preferred stock	—		67,709		—		67,709
Common stock	14,732		3,516		—		18,248
Total equity securities	14,732		71,225		—		85,957
Total available-for-sale securities	$	96,372	$	1,028,156	$	4,680	$	1,129,208
Trading securities:
Fixed maturity securities	$	—	$	3,805	$	—	$	3,805
Short-term investments	$	1,000	$	25,235	$	—	$	26,235

22

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

Assets measured at fair value on a recurring basis as of December 31, 2017 are summarized below:

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
Available-for-sale securities:
Fixed maturity securities:
State and municipal	$	—	$	144,366	$	—	$	144,366
Residential mortgage-backed	—		158,661		—		158,661
Corporate	—		413,721		—		413,721
Commercial mortgage and asset-backed	—		177,931		4,680		182,611
Obligations of U.S. government corporations and agencies	—		35,847		—		35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government	78,265		609		—		78,874
Redeemable preferred stock	—		2,018		—		2,018
Total fixed maturity securities	78,265		933,153		4,680		1,016,098
Equity securities:
Preferred stock	—		66,281		—		66,281
Common stock	15,507		734		—		16,241
Total equity securities	15,507		67,015		—		82,522
Total available-for-sale securities	$	93,772	$	1,000,168	$	4,680	$	1,098,620
Trading securities:
Fixed maturity securities	$	—	$	3,808	$	—	$	3,808
Short-term investments	$	1,000	$	35,804	$	—	$	36,804

The beginning and ending balances of assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of one available-for-sale fixed maturity security with a fair value of $4.7 million, and there was no activity (purchases, sales, transfers) involving Level 3 securities for the three months ended March 31, 2018 and 2017. A market approach using prices in trades of comparable securities was utilized to determine the fair value for this security at March 31, 2018 and December 31, 2017.

Transfers out of Level 3 occur when the Company is able to obtain reliable prices from pricing vendors for securities for which the Company was previously unable to obtain reliable prices. Transfers in to Level 3 occur when the Company is unable to obtain reliable prices for securities from pricing vendors and instead must use broker price quotes to value the securities.

There were no transfers between Level 1 and Level 2 during the three months ended March 31, 2018 or 2017. The Company recognizes transfers between levels at the beginning of the reporting period.

There were no realized gains or losses included in earnings for the three months ended March 31, 2018 attributable to the change in unrealized gains or losses relating to Level 3 assets valued at fair value on a recurring basis that are still held at March 31, 2018.

The Company measures certain bank loan participations at fair value on a non-recurring basis during the year as part of the Company’s impairment evaluation when loans are determined by management to be impaired.

23

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

Assets measured at fair value on a nonrecurring basis are summarized below:

	Fair Value Measurements Using
	Quoted Prices In Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
March 31, 2018
Bank loan participations held-for-investment	$	—	$	—	$	1,741	$	1,741
December 31, 2017
Bank loan participations held-for-investment	$	—	$	—	$	5,111	$	5,111

Bank loan participations held-for-investment that were determined to be impaired were written down to their fair value of $1.7 million at March 31, 2018 and $5.1 million at December 31, 2017.

In the determination of the fair value for bank loan participations and certain high yield bonds, the Company’s investment manager endeavors to obtain data from multiple external pricing sources. External pricing sources may include brokers, dealers and price data vendors that provide a composite price based on prices from multiple dealers. Such external pricing sources typically provide valuations for normal institutional size trading units of such securities using methods based on market transactions for comparable securities, and various relationships between securities, as generally recognized by institutional dealers. For investments in which the investment manager determines that only one external pricing source is appropriate or if only one external price is available, the relevant investment is generally recorded at fair value based on such price.

Investments for which external sources are not available or are determined by the investment manager not to be representative of fair value are recorded at fair value as determined by the Company, with input from its investment managers and valuation specialists as considered necessary. In determining the fair value of such investments, the Company considers one or more of the following factors: type of security held, convertibility or exchangeability of the security, redeemability of the security (including the timing of redemptions), application of industry accepted valuation models, recent trading activity, liquidity, estimates of liquidation value, purchase cost, and prices received for securities with similar terms of the same issuer or similar issuers. At March 31, 2018, there were no investments for which external sources were unavailable to determine fair value. At December 31, 2017, there was one bank loan participation with an unpaid principal balance of $807,000 and a carrying value of zero for which external sources were unavailable to determine fair value.

The carrying values and fair values of financial instruments are summarized below:

	March 31, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Assets
Available-for-sale:
Fixed maturity securities	$	1,043,251	$	1,043,251	$	1,016,098	$	1,016,098
Equity securities	85,957		85,957		82,522		82,522
Trading:
Fixed maturity securities	3,805		3,805		3,808		3,808
Bank loan participations held-for-investment	257,426		257,840		238,214		236,532
Cash and cash equivalents	151,046		151,046		163,495		163,495
Short-term investments	26,235		26,235		36,804		36,804
Other invested assets – notes receivable	13,250		19,056		11,778		17,104
Liabilities
Senior debt	98,300		98,871		98,300		97,884
Junior subordinated debt	104,055		118,752		104,055		116,569

24

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

The fair values of fixed maturity securities and equity securities have been determined using quoted market prices for securities traded in the public market or prices using bid or closing prices for securities not traded in the public marketplace. The fair values of cash and cash equivalents and short-term investments approximate their carrying values due to their short-term maturity.

The fair values of other invested assets-notes receivable, senior debt, and junior subordinated debt at March 31, 2018 and December 31, 2017 were determined by calculating the present value of expected future cash flows under the terms of the note agreements or debt agreements, as applicable, discounted at an estimated market rate of interest at March 31, 2018 and December 31, 2017, respectively.

The fair values of bank loan participations held-for-investment, senior debt, and junior subordinated debt at March 31, 2018 and December 31, 2017 were determined using inputs to the valuation methodology that are unobservable (Level 3).

11.    Capital Stock and Equity Awards

The Company issued 170,023 common shares in the three months ended March 31, 2018 with 127,196 new shares related to stock option exercises and 42,827 new shares related to vesting of RSUs. The total common shares outstanding increased from 29,696,682 at December 31, 2017 to 29,866,705 at March 31, 2018.

The Company declared the following dividends during the first three months of 2018 and 2017:

Date of Declaration	Dividend per Common Share		Payable to Shareholders of Record on	Payment Date	Total Amount
2018
February 22, 2018	$	0.30	March 12, 2018	March 30, 2018	$	9.0	million
2017
February 14, 2017	$	0.30	March 13, 2017	March 31, 2017	$	8.9	million

Included in the dividends are $99,000 and $77,000 of dividend equivalents on RSUs, respectively. The balance of dividends payable was $409,000 at March, 31, 2018 and $434,000 at December 31, 2017.

Equity Incentive Plans

The Company’s shareholders have approved various equity incentive plans, including the Amended and Restated 2009 Equity Incentive Plan (the “Legacy Plan”), the 2014 Long Term Incentive Plan (“2014 LTIP”), and the 2014 Non-Employee Director Incentive Plan (“2014 Director Plan”) (collectively, the “Plans”). All awards issued under the Plans are issued at the discretion of the Board of Directors. Under the Legacy Plan, employees received non-qualified stock options. Options are outstanding under the Legacy Plan; however, no additional awards may be granted.

Employees are eligible to receive non-qualified stock options, incentive stock options, share appreciation rights, performance shares, restricted shares, RSUs, and other awards under the 2014 LTIP. The maximum number of shares available for issuance under the 2014 LTIP is 4,171,150, and at March 31, 2018, 1,658,715 shares are available for grant.

Non-employee directors of the Company are eligible to receive non-qualified stock options, share appreciation rights, performance shares, restricted shares, restricted share units, and other awards under the 2014 Director Plan. The maximum number of shares available for issuance under the 2014 Director Plan is 50,000, and at March 31, 2018, 21,663 shares are available for grant.

Generally, awards issued under the 2014 LTIP and 2014 Director Plan vest immediately in the event that an award recipient is terminated without Cause (as defined), and in the case of the 2014 LTIP for Good Reason (as defined), at any time following a Change in Control (as defined in the applicable plans).

25

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

Options

The following table summarizes the option activity for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Outstanding:
Beginning of period	1,479,236		$	27.81	2,234,699		$	22.84
Granted	—		$	—	195,509		$	42.17
Exercised	(142,129	)	$	20.14	(97,211	)	$	17.23
Forfeited	—		$	—	(50,062	)	$	27.97
End of period	1,337,107		$	28.63	2,282,935		$	24.62
Exercisable, end of period	983,508		$	26.06	1,334,756		$	20.47

All of the outstanding options vest over three or four years and have a contractual life of seven years from the original date of grant. All of the outstanding options have an exercise price greater than or equal to the fair value of the underlying shares at the date of grant. The weighted-average remaining contractual life of the options outstanding and options exercisable was 4.4 years and 4.0 years, respectively.

RSUs

The following table summarizes the RSU activity for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted- Average Grant Date Fair Value		Shares		Weighted- Average Grant Date Fair Value
Unvested, beginning of period	178,882		$	37.93	196,800		$	24.38
Granted	214,907		$	39.81	117,879		$	42.17
Vested	(62,714	)	$	40.90	(37,485	)	$	32.07
Forfeited	—		$	—	(19,743	)	$	24.06
Unvested, end of period	331,075		$	38.59	257,451		$	31.43

The vesting period of RSUs granted to employees range from one to five years and vest ratably over the respective vesting period, and the majority vest in three years. All RSUs granted to date to non-employee directors had a one year vesting period. The holders of RSUs are entitled to dividend equivalents. The dividend equivalents are settled in cash at the same time that the underlying RSUs vest and are subject to the same risk of forfeiture as the underlying shares. The fair value of the RSUs granted is based on the market price of the underlying shares.

Compensation Expense

Share based compensation expense is recognized on a straight line basis over the vesting period. The amount of expense and related tax benefit is summarized below:

	Three Months Ended March 31,
	2018		2017
	(in thousands)
Share based compensation expense	$	1,455	$	1,794
U.S. tax benefit on share based compensation expense	173		469

26

JAMES RIVER GROUP HOLDING, LTD. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (continued)

As of March 31, 2018, the Company had $14.0 million of unrecognized share based compensation expense expected to be charged to earnings over a weighted-average period of 2.3 years.

12.    Subsequent Events

On May 1, 2018, the Board of Directors declared a cash dividend of $0.30 per common share. The dividend is payable on June 29, 2018 to shareholders of record on June 11, 2018.

27

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those anticipated in these forward-looking statements as a result of many factors. Factors that could cause such differences are discussed in the sections entitled “Special Note Regarding Forward-Looking Statements” in this Quarterly Report on Form 10-Q, or “Quarterly Report”, and Part I, Item 1A “Risk Factors” in our Annual Report on form 10-K for the year ended December 31, 2017. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2018, or for any other future period. The following discussion should be read in conjunction with the unaudited condensed consolidated financial statements and the notes thereto included in Part I, Item 1 of this Quarterly Report, and in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017.

The accompanying condensed consolidated financial statements and related notes have been prepared in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”) and include the accounts of James River Group Holdings, Ltd. and its subsidiaries. Unless the context indicates or suggests otherwise, references to “the Company”, “we”, “us” and “our” refer to James River Group Holdings, Ltd. and its subsidiaries.

Our Business

James River Group Holdings, Ltd. is a Bermuda-based holding company. We own and operate a group of specialty insurance and reinsurance companies with the objective of generating compelling returns on tangible equity while limiting underwriting and investment volatility. We seek to accomplish this by consistently earning profits from insurance and reinsurance underwriting and generating meaningful risk-adjusted investment returns while managing our capital opportunistically.

Our underwriting profit for the three months ended March 31, 2018 was $7.2 million. In the prior year, for the same period, we had an underwriting profit of $4.3 million. Each of our operating segments experienced increases in underwriting profit from 2017 to 2018.

We are organized into four reportable segments, which are separately managed business units:

• The Excess and Surplus Lines segment offers commercial excess and surplus lines liability and property insurance in every U.S. state, the District of Columbia, Puerto Rico and the U.S. Virgin Islands through James River Insurance Company and its wholly-owned subsidiary, James River Casualty Company;

• The Specialty Admitted Insurance segment focuses on niche classes within the standard insurance markets, such as workers’ compensation coverage for residential contractors, light manufacturing operations, transportation workers and healthcare workers and fronting business, where we retain a small percentage of the risk and seek to earn fee income by allowing other carriers and producers to use our licensure, ratings and infrastructure. This segment has admitted licenses in 49 states and the District of Columbia;

• The Casualty Reinsurance segment primarily provides proportional and working layer casualty reinsurance to third parties (primarily through reinsurance intermediaries) and to our U.S.-based insurance subsidiaries (primarily through quota share reinsurance), through JRG Reinsurance Company Ltd. (“JRG Re”), a Bermuda-based reinsurance company. In addition, Carolina Re Ltd (“Carolina Re”) was formed in 2018 to provide reinsurance to the Company's U.S. based insurance subsidiaries; and

• The Corporate and Other segment consists of the management and treasury activities of our holding companies, interest expense associated with our debt, and expenses of our holding companies, including public company expenses, that are not reimbursed by our insurance segments.

All of our insurance and reinsurance subsidiaries have financial strength ratings of “A” (Excellent) from A.M. Best Company.

Critical Accounting Policies and Estimates

In preparing the unaudited condensed consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses for the reporting period. Actual results could differ significantly from those estimates.

The most critical accounting policies involve significant estimates and include those used in determining the reserve for losses and loss adjustment expenses, investment valuation and impairment, goodwill and intangible assets, and assumed reinsurance premiums. For a detailed discussion of each of these policies, refer to our Annual Report on Form 10-K for the year ended December 31, 2017. There have been no significant changes to any of these policies during the current year.

28

RESULTS OF OPERATIONS

The following table summarizes our results for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,						%
	2018			2017			Change
	($ in thousands)
Gross written premiums	$	298,116		$	224,179		33.0	%
Net retention (1)	70.8		%	70.4		%
Net written premiums	$	210,978		$	157,910		33.6	%
Net earned premiums	$	200,942		$	154,687		29.9	%
Losses and loss adjustment expenses	(143,772		)	(105,369		)	36.4	%
Other operating expenses	(49,935		)	(45,044		)	10.9	%
Underwriting profit (2), (3)	7,235			4,274			69.3	%
Net investment income	13,256			16,733			(20.8	)%
Net realized investment gains (losses)	(810		)	1,047			‒
Other income and expense	104			200			(48.0	)%
Interest expense	(2,522		)	(2,123		)	18.8	%
Amortization of intangible assets	(149		)	(149		)	‒
Income before taxes	17,114			19,982			(14.4	)%
Income tax expense	1,481			1,532			(3.3	)%
Net income	$	15,633		$	18,450		(15.3	)%
Adjusted net operating income (4)	$	16,569		$	17,719		(6.5	)%
Ratios:
Loss ratio	71.5		%	68.1		%
Expense ratio	24.9		%	29.1		%
Combined ratio	96.4		%	97.2		%

(1) Net retention is defined as the ratio of net written premiums to gross written premiums.

(2) Underwriting Profit is a non-GAAP measure. See “Reconciliation of Non-GAAP Measures” for a reconciliation to income before tax and for additional information.

(3) Included in underwriting results for the three months ended March 31, 2018 and 2017 is gross fee income of $8.2 million and $5.9 million, respectively.

(4) Adjusted net operating income is a non-GAAP measure. See “Reconciliation of Non-GAAP Measures” for reconciliation to net income and for additional information.

The Company had an underwriting profit of $7.2 million for the three months ended March 31, 2018. This compares to an underwriting profit of $4.3 million for the same period in the prior year.

The results for the three months ended March 31, 2018 and 2017 include certain non-operating items that are significant to the Company. These items (on a pre-tax basis) include: 

• Net realized investment losses of $810,000 and net realized investment gains of $1.0 million for the three months ended March 31, 2018 and 2017, respectively. See “— Investing Results" for more information on these realized investment losses and gains.

• Interest expense of $318,000 and $312,000 for the three months ended March 31, 2018 and 2017, respectively, relating to finance expenses in connection with a minority interest in a real estate partnership pursuant to which we are deemed an owner for accounting purposes. The debt is nonrecourse to us and was not arranged by us.

We define adjusted net operating income as net income excluding certain non-operating expenses such as net realized investment gains and losses, expenses related to due diligence costs for various merger and acquisition activities, professional service fees related to the filing of registration statements for the offering of securities, severance costs associated with terminated employees, and interest and other income and expenses on a leased building that we are deemed to own for accounting purposes. We use adjusted net operating income as an internal performance measure in the management of our operations because we believe

29

it gives our management and other users of our financial information useful insight into our results of operations and our underlying business performance. Adjusted net operating income should not be viewed as a substitute for net income calculated in accordance with GAAP, and our definition of adjusted net operating income may not be comparable to that of other companies.

Our income before taxes and net income for the three months ended March 31, 2018 and 2017 reconcile to our adjusted net operating income as follows:

	Three Months Ended March 31,
	2018				2017
	Income Before Taxes		Net Income		Income Before Taxes			Net Income
	($ in thousands)
Income as reported	$	17,114	$	15,633	$	19,982		$	18,450
Net realized investment losses (gains)	810		665		(1,047		)	(834		)
Other expenses	4		20		(114		)	(100		)
Interest expense on leased building the Company is deemed to own for accounting purposes	318		251		312			203
Adjusted net operating income	$	18,246	$	16,569	$	19,133		$	17,719

Our combined ratio for the three months ended March 31, 2018 was 96.4%. The combined ratio is a measure of underwriting performance and represents the relationship of incurred losses, loss adjustment expenses and other operating expenses to net earned premiums. A combined ratio of less than 100% indicates an underwriting profit, while a combined ratio greater than 100% reflects an underwriting loss. The combined ratio for the three months ended March 31, 2018 includes $2.6 million, or 1.3 percentage points, of net favorable reserve development on prior accident years, including $1.1 million of net favorable reserve development from the Excess and Surplus Lines segment, $1.3 million of net favorable reserve development from the Specialty Admitted Insurance segment, and $176,000 of net favorable reserve development from the Casualty Reinsurance segment.

The combined ratio for the three months ended March 31, 2017 was 97.2%. The combined ratio included $3.4 million, or 2.2 percentage points, of net favorable reserve development on prior accident years, including $3.2 million of net favorable reserve development from the Excess and Surplus Lines segment, $42,000 of net favorable reserve development from the Specialty Admitted Insurance segment, and $145,000 of net favorable reserve development from the Casualty Reinsurance segment.

Our expense ratio improved from 29.1% for the three months ended March 31, 2017 to 24.9% for the three months ended March 31, 2018. The improvement is due to a 38.5% increase in the net earned premiums of the Excess and Surplus Lines segment and an increase in gross fee income for the Company as a whole. Our Excess and Surplus Lines segment has significant scale and produces a lower expense ratio than our other operating segments. The Excess and Surplus Lines segment is our largest segment and makes up 64.7% of consolidated net earned premiums for the three months ended March 31, 2018. Gross fee income for the Company increased from $5.9 million for the three months ended March 31, 2017 to $8.2 million for the three months ended March 31, 2018.

All of the Company’s U.S.-domiciled insurance subsidiaries are party to an intercompany pooling agreement that distributes the net underwriting results among the group companies based on their approximate pro-rata level of statutory capital and surplus to the total Company statutory capital and surplus. Additionally, each of the Company’s U.S.-domiciled insurance subsidiaries is a party to a quota share reinsurance agreement that in prior periods ceded 70% of their premiums and losses to JRG Re, and starting January 1, 2018, ceded 70% of their premiums and losses to Carolina Re, an Internal Revenue Code of 1986, as amended (the “Code”), Section 953(d) U.S. tax paying entity domiciled in Bermuda. We report all segment information in this ‘‘Management’s Discussion and Analysis of Financial Condition and Results of Operations’’ prior to the effects of intercompany reinsurance, consistent with the manner in which we evaluate the operating performance of our reportable segments.

30

Premiums

Insurance premiums are earned ratably over the terms of our insurance policies, generally twelve months. Reinsurance premiums assumed are earned over the terms of the underlying policies or reinsurance contracts. Contracts and policies written on a “losses occurring” basis cover claims that may occur during the term of the contract or policy, which is typically twelve months. Contracts which are written on a “risks attaching” basis cover claims which attach to the underlying insurance policies written during the terms of such contracts. Premiums earned on such contracts usually extend beyond the original term of the reinsurance contract, typically resulting in recognition of premiums earned over a 24-month period in proportion to the level of underlying exposure.

The following table summarizes the change in premium volume by component and business segment:

	Three Months Ended March 31,				%
	2018		2017		Change
	($ in thousands)
Gross written premiums:
Excess and Surplus Lines	$	167,486	$	108,995	53.7	%
Specialty Admitted Insurance	87,401		72,464		20.6	%
Casualty Reinsurance	43,229		42,720		1.2	%
	$	298,116	$	224,179	33.0	%
Net written premiums:
Excess and Surplus Lines	$	153,931	$	96,971	58.7	%
Specialty Admitted Insurance	13,818		18,059		(23.5	)%
Casualty Reinsurance	43,229		42,880		0.8	%
	$	210,978	$	157,910	33.6	%
Net earned premiums:
Excess and Surplus Lines	$	129,971	$	93,849	38.5	%
Specialty Admitted Insurance	13,340		16,253		(17.9	)%
Casualty Reinsurance	57,631		44,585		29.3	%
	$	200,942	$	154,687	29.9	%

Each of our operating segments experienced growth in gross written premiums during 2018. Premiums for the Company for the three months ended March 31, 2018 were affected by the following:

Gross written premiums for the Excess and Surplus Lines segment (which represents 56.2% of our consolidated gross written premiums in the first three months of 2018) increased to $167.5 million for the three months ended March 31, 2018, 53.7% over the corresponding period in the prior year. Gross written premiums excluding commercial auto policies increased 34.8% for the three months ended March 31, 2018 compared to the same period in the prior year. Policy submissions excluding commercial auto policies were 8.1% higher and 7.9% more policies were bound in the three months ended March 31, 2018 than in the three months ended March 31, 2017. Rates for non-commercial auto policies were up compared to the three months ended March 31, 2017. For the three months ended March 31, 2018, the change in gross written premiums compared to the same period in 2017 was most notable in our:

• Commercial Auto division (representing 46.1% of this segment’s business for the three months ended March 31, 2018), which increased $35.2 million (or 83.6%) for the three months ended March 31, 2018. This division is focused on underwriting the hired and non-owned auto liability exposures for a variety of industry segments with a particular niche for insuring organizations that operate networks connecting independent contractors with customers.

• General Casualty division (representing 8.7% of this segment’s business for three months ended March 31, 2018) which increased $6.0 million (or 69.9%) for the three months ended March 31, 2018.

• Allied Health division (representing 12.6% of this segment’s business for the three months ended March 31, 2018) which increased $14.3 million (or 208.0%) for the three months ended March 31, 2018.

• Energy division (representing 6.9% of this segment’s business for the three months ended March 31, 2018) which increased $5.7 million (or 96.8%) for the three months ended March 31, 2018.

• Manufacturers and Contractors division (representing 10.5% of this segment’s business for the three months ended March 31, 2018) which decreased $4.5 million (or 20.2%) for the three months ended March 31, 2018.

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The components of gross written premiums for the Specialty Admitted Insurance segment (which represents 29.3% of our consolidated gross written premiums for the three months ended March 31, 2018) are as follows:

	Three Months Ended March 31,				%
	2018		2017		Change
	($ in thousands)
Total workers’ compensation premium	$	12,587	$	11,799	6.7	%
Fronting and program premium	74,814		60,665		23.3	%
Specialty Admitted gross written premium	$	87,401	$	72,464	20.6	%

A significant portion of the fronting business is ceded to third party reinsurers. As a result, our fronting net written premium for this segment increased by less than our gross written premiums, increasing $547,000 (or 7.4%) for the three months ended March 31, 2018.

Gross written premiums for the Casualty Reinsurance segment (which represents 14.5% of our consolidated gross written premiums in the first three months of 2018) increased 1.2% for the three months ended March 31, 2018 compared to the three months ended March 31, 2017. Adjustments to premium estimates in the three months ended March 31, 2018 on policies written in prior years increased written premium by $4.0 million, while adjustments to premium estimates in the three months ended March 31, 2017 reduced written premiums by $6.6 million. The premium increase resulting from premium adjustments was partially offset by the nonrenewal of a $3.6 million premium account and a reduction in the segment’s share assumed in another treaty that resulted in a $7.1 million decline in written premium on that account compared to prior year. The Casualty Reinsurance segment generally writes large casualty-focused treaties that are expected to have lower volatility relative to property and catastrophe treaties. We rarely write stand-alone property reinsurance. When treaties that include property exposure are written, we utilize property occurrence caps, inuring reinsurance protection and low individual risk limits to minimize exposure.

Net Retention

The ratio of net written premiums to gross written premiums is referred to as our net premium retention. Our net premium retention is summarized by segment as follows:

	Three Months Ended March 31,
	2018		2017
Excess and Surplus Lines	91.9	%	89.0	%
Specialty Admitted Insurance	15.8	%	24.9	%
Casualty Reinsurance	100.0	%	100.4	%
Total	70.8	%	70.4	%

The net premium retention for the Excess and Surplus Lines segment increased from 2017 to 2018 due to increased premium on our commercial auto business. We generally retain all of the premium written by the Commercial Auto division.

The net premium retention for the Specialty Admitted Insurance segment decreased from 2017 to 2018 as a result of growth in the segment's fronting business, which generally has much lower net premium retention than our workers’ compensation business. Fronting gross written premium grew 23.3% for the three months ended March 31, 2018 compared to the corresponding period in the prior year. For the three months ended March 31, 2018, the net retention on the segment’s fronting business was 10.6% compared to 12.2% in the three months ended March 31, 2017. The net retention on the workers’ compensation business was 46.8% and 90.5% in the three months ended March 31, 2018 and 2017, respectively. The significant decline in the net retention from the prior year is due to the 50% third-party quota share reinsurance coverage purchased in this business effective October 1, 2017.

The net retention for the Casualty Reinsurance segment for the three months ended March 31, 2017 included adjustments to the estimates of both gross and net written premiums from prior years that caused this segment’s net premium retention to slightly exceed 100% in the period.

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Underwriting Results

The following table compares our combined ratios by segment:

	Three Months Ended March 31,
	2018		2017
Excess and Surplus Lines	91.3	%	90.6	%
Specialty Admitted Insurance	87.8	%	94.8	%
Casualty Reinsurance	97.0	%	97.5	%
Total	96.4	%	97.2	%

Excess and Surplus Lines Segment

Results for the Excess and Surplus Lines segment are as follows:

	Three Months Ended March 31,						%
	2018			2017			Change
	($ in thousands)
Gross written premiums	$	167,486		$	108,995		53.7	%
Net written premiums	$	153,931		$	96,971		58.7	%
Net earned premiums	$	129,971		$	93,849		38.5	%
Losses and loss adjustment expenses	(100,619		)	(66,568		)	51.2	%
Underwriting expenses	(18,053		)	(18,481		)	(2.3	)%
Underwriting profit (1), (2)	$	11,299		$	8,800		28.4	%
Ratios:
Loss ratio	77.4		%	70.9		%
Expense ratio	13.9		%	19.7		%
Combined ratio	91.3		%	90.6		%

(1) Underwriting Profit is a non-GAAP Measure. See “Reconciliation of Non-GAAP Measures” for a reconciliation to income before tax and for additional information.

(2) Underwriting results include gross fee income of $4.8 million and $3.8 million for the three months ended March 31, 2018 and 2017, respectively.

The loss ratio of 77.4% for the three months ended March 31, 2018 includes $1.1 million, or 0.9 percentage points, of net favorable development in our loss estimates for prior accident years. The loss ratio of 70.9% for the three months ended March 31, 2017 includes $3.2 million, or 3.4 percentage points, in net favorable reserve development in our loss estimates for prior accident years. The favorable reserve development in this segment reflects positive loss trends.

The expense ratio for this segment declined from 19.7% for the three months ended March 31, 2017 to 13.9% for the three months ended March 31, 2018. The decrease in the expense ratio is attributable to the increase in net earned premium of 38.5% for the three months ended March 31, 2018 without a proportional increase in the total amount of operating expenses. Gross fee income increased slightly and contributed to a reduction in the expense ratio of 3.7 percentage points for the three months ended March 31, 2018 compared to 4.1 percentage points for the three months ended March 31, 2017.

The reduced expense ratio and higher loss ratio in this segment is due to the increase in commercial auto premium as a percentage of the Excess and Surplus Lines segment’s total premium. Our commercial auto business has a lower expense ratio and higher loss ratio than the other underwriting divisions in the segment. Commercial auto made up 56.7% of the segment’s net earned premiums for the three months ended March 31, 2018, up from 46.0% for the three months ended March 31, 2017.

As a result of the items discussed above, the underwriting profit of the Excess and Surplus Lines segment increased 28.4% from $8.8 million for the three months ended March 31, 2017 to $11.3 million for the three months ended March 31, 2018.

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Specialty Admitted Insurance Segment

Results for the Specialty Admitted Insurance segment are as follows:

	Three Months Ended March 31,						%
	2018			2017			Change
	($ in thousands)
Gross written premiums	$	87,401		$	72,464		20.6	%
Net written premiums	$	13,818		$	18,059		(23.5	)%
Net earned premiums	$	13,340		$	16,253		(17.9	)%
Losses and loss adjustment expenses	(7,611		)	(9,981		)	(23.7	)%
Underwriting expenses	(4,106		)	(5,430		)	(24.4	)%
Underwriting profit(1), (2)	$	1,623		$	842		92.8	%
Ratios:
Loss ratio	57.1		%	61.4		%
Expense ratio	30.7		%	33.4		%
Combined ratio	87.8		%	94.8		%

(1) Underwriting Profit is a non-GAAP Measure. See “Reconciliation of Non-GAAP Measures” for a reconciliation to income before tax and for additional information.

(2) Underwriting results include gross fee income of $3.3 million and $2.1 million for the three months ended March 31, 2018 and 2017, respectively.

The loss ratio of 57.1% for the three months ended March 31, 2018 includes $1.3 million, or 9.9 percentage points, of net favorable development in our loss estimates for prior accident years. The loss ratio of 61.4% for the three months ended March 31, 2017 includes $42,000, or 0.3 percentage points, in net favorable reserve development in our loss estimates for prior accident years. The favorable reserve development in 2018 and 2017 reflects the fact that actual loss emergence of the workers’ compensation book has been better than expected.

The expense ratio of the Specialty Admitted Insurance segment was 30.7% for the three months ended March 31, 2018 compared to the prior year ratio of 33.4%. The expense ratio declined in 2018 for this segment due to gross fee income from the fronting business which increased 62.2% for the three months ended March 31, 2018 compared to the same period in the prior year.

As a result of the items discussed above, the underwriting profit of the Specialty Admitted Insurance segment increased 92.8% from $842,000 for the three months ended March 31, 2017 to $1.6 million for the three months ended March 31, 2018.

Casualty Reinsurance Segment

Results for the Casualty Reinsurance segment are as follows:

	Three Months Ended March 31,						%
	2018			2017			Change
	($ in thousands)
Gross written premiums	$	43,229		$	42,720		1.2	%
Net written premiums	$	43,229		$	42,880		0.8	%
Net earned premiums	$	57,631		$	44,585		29.3	%
Losses and loss adjustment expenses	(35,542		)	(28,820		)	23.3	%
Underwriting expenses	(20,345		)	(14,672		)	38.7	%
Underwriting profit (1)	$	1,744		$	1,093		59.6	%
Ratios:
Loss ratio	61.7		%	64.6		%
Expense ratio	35.3		%	32.9		%
Combined ratio	97.0		%	97.5		%

(1) Underwriting Profit is a non-GAAP Measure. See “Reconciliation of Non-GAAP Measures” for a reconciliation to income before tax and for additional information.

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The Casualty Reinsurance segment focuses on lower volatility, proportional reinsurance which requires larger ceding commissions resulting in a higher commission expense than in our other segments.

The loss ratio of 61.7% for the three months ended March 31, 2018 includes $176,000, or 0.3 percentage points, of net favorable development in our loss estimates for prior accident years. The loss ratio of 64.6% for the three months ended March 31, 2017 includes $145,000, or 0.3 percentage points, in net favorable reserve development in our loss estimates for prior accident years.

The expense ratio of the Casualty Reinsurance segment was 35.3% for the three months ended March 31, 2018 compared to the prior year ratio of 32.9%. The increase is primarily due to increases in sliding scale ceding commissions associated with declining loss ratios on certain contracts.

As a result of the items discussed above, the Casualty Reinsurance segment had a $1.7 million underwriting profit for the three months ended March 31, 2018 and a $1.1 million underwriting profit for the three months ended March 31, 2017.

Reserves

An indicator of reserve strength that we monitor closely is the percentage of our gross and net loss reserves that are comprised of incurred but not reported (“IBNR”) reserves.

The Company’s gross reserve for losses and loss adjustment expenses at March 31, 2018 was $1,369.5 million. Of this amount, 65.1% relates to amounts that are IBNR. This amount was 64.6% at December 31, 2017. The Company’s gross reserves for losses and loss adjustment expenses by segment are summarized as follows:

	Gross Reserves at March 31, 2018
	Case		IBNR		Total
	($ in thousands)
Excess and Surplus Lines	$	246,521	$	558,736	$	805,257
Specialty Admitted Insurance	134,492		167,749		302,241
Casualty Reinsurance	97,139		164,911		262,050
Total	$	478,152	$	891,396	$	1,369,548

At March 31, 2018, the amount of net reserves of $1,038.3 million that related to IBNR was 65.6%. This amount was 65.0% at December 31, 2017. The Company’s net reserves for losses and loss adjustment expenses by segment are summarized as follows:

	Net Reserves at March 31, 2018
	Case		IBNR		Total
	($ in thousands)
Excess and Surplus Lines	$	227,947	$	473,188	$	701,135
Specialty Admitted Insurance	36,049		45,310		81,359
Casualty Reinsurance	92,754		163,055		255,809
Total	$	356,750	$	681,553	$	1,038,303

Other Operating Expenses

In addition to the underwriting, acquisition, and insurance expenses of the Excess and Surplus Lines segment, the Specialty Admitted Insurance segment, and the Casualty Reinsurance segment discussed previously, other operating expenses also includes the expenses of the Corporate and Other segment.

Corporate and Other Segment

Other operating expenses for the Corporate and Other segment include personnel costs associated with the Bermuda and U.S. holding companies, professional fees, and various other corporate expenses that are included in our calculation of our expense ratio and our combined ratio. Other operating expenses of the Corporate and Other segment represent the expenses of both the Bermuda and U.S. holding companies that were not reimbursed by our subsidiaries, including costs associated with our internal quota share, rating agencies and strategic initiatives. These costs vary from period-to-period based on the status of these initiatives.

For the three months ended March 31,2018 and 2017, the total operating expenses of the Corporate and Other segment were $7.4 million and $6.5 million, respectively, representing a 15.0% increase over the prior year. The increase was driven by compensation costs, including stock compensation expenses, associated with increases in headcount and costs associated with the formation and operations of a new Class 3A reinsurer that has made an irrevocable election to be taxed as a U.S. domestic corporation under Section 953(d) of the Code. See “Income Tax Expense” for additional discussions regarding this newly formed 953(d) reinsurer.

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Investing Results

Net investment income for the three months ended March 31, 2018 and 2017 was $13.3 million and $16.7 million, respectively. The change in our net investment income is as follows:

	Three Months Ended March 31,
	2018		2017		% Change
	($ in thousands)
Renewable energy LLCs	$	1,211	$	5,594	(78.4	)%
Other private investments	609		468		30.1	%
Other invested assets	1,820		6,062		(70.0	)%
All other net investment income	11,436		10,671		7.2	%
Total net investment income	$	13,256	$	16,733	(20.8	)%

The lower net investment income for the three months ended March 31, 2018 was driven by the performance of the Company’s renewable energy LLC investments. Net investment income from renewable energy LLCs declined from $5.6 million in the three months ended March 31, 2017 to $1.2 million in the three months ended March 31, 2018. These investments are interests in certain limited liability companies that are managed by an affiliate of our largest affiliated shareholders, and together, the carrying value of these investments was $32.6 million at March 31, 2018. Our interests in these companies are classified as “other invested assets” and the equity method is being used to account for the investments. Excluding private investments, our net investment income increased by 7.2% for the three months ending March 31, 2018 over the same period in the prior year. This increase in net investment income was partially due to a 12.2% increase in our average cash and invested assets for the three months ended March 31, 2018 compared to the same period in the prior year. The average duration of our fixed maturity portfolio was 3.5 years at March 31, 2018.

Major categories of the Company’s net investment income are summarized as follows:

	Three Months Ended March 31,
	2018			2017
	($ in thousands)
Fixed maturity securities	$	8,030		$	6,578
Bank loan participations	3,117			3,612
Equity securities	667			1,228
Other invested assets	1,820			6,062
Cash, cash equivalents, and short-term investments	592			254
Trading (losses) gains	(3		)	3
Gross investment income	14,223			17,737
Investment expense	(967		)	(1,004		)
Net investment income	$	13,256		$	16,733

The following table summarizes our investment returns:

	Three Months Ended March 31,
	2018		2017
Annualized gross investment yield on:
Average cash and invested assets	3.5	%	4.9	%
Average fixed maturity securities	3.4	%	3.4	%

Of our total cash and invested assets of $1,642.7 million at March 31, 2018, $151.0 million represents the cash and cash equivalents portion of the portfolio. The majority of the portfolio, or $1,043.3 million, is comprised of fixed maturity securities that are classified as available-for-sale and carried at fair value with unrealized gains and losses on these securities reported, net of applicable taxes, as a separate component of accumulated comprehensive income or loss. Also included in our investments are $257.4 million of bank loan participations, $86.0 million of equity securities, $26.2 million of short-term investments, $75.0 million of other invested assets, and $3.8 million of fixed maturity securities classified as trading which are held at the U.S. holding

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company. Our trading portfolio is carried at fair value with changes to the value reported as net investment income in our condensed consolidated income statement.

The $257.4 million of bank loan participations in our investment portfolio are classified as held-for-investment and reported at amortized cost, net of an allowance for credit losses of $300,000. Changes in this credit allowance are included in realized gains or losses. These bank loan participations are primarily senior, secured floating-rate debt rated “BB”, “B”, or “CCC” by Standard & Poor’s or an equivalent rating from another nationally recognized statistical rating organization, and are therefore below investment grade. Bank loans include assignments of and participations in, performing and non-performing senior corporate debt generally acquired through primary bank syndications and in secondary markets. They consist of, but are not limited to, term loans, the funded and unfunded portions of revolving credit loans, and similar loans and investments. At March 31, 2018 and December 31, 2017, the fair market value of these securities was $257.8 million and $236.5 million, respectively.

For the three months ended March 31, 2018, the Company recognized net realized investment losses of $810,000, including $201,000 of net realized investment losses on the sale of fixed maturity securities and losses for the change in the fair value of equity securities of $1.7 million, partially offset by $1.1 million of net realized investment gains on the sale of bank loan securities ($807,000 of which related to the realized gain on the repayment of the loan to the producer and supplier of power in Puerto Rico described below).

For the three months ended March 31, 2017, we recognized net realized investment gains of $1.0 million, including $420,000 of net realized investment gains recognized on the sale of fixed maturities and $409,000 of net realized investment gains recognized on the sale of equity securities.

In conjunction with its outside investment managers, the Company performs quarterly reviews of all securities within its investment portfolio to determine whether any impairment has occurred.

At December 31, 2017, the Company held a participation in a loan with unpaid principal of $807,000 issued by a company that produces and supplies power to Puerto Rico through a power purchase agreement with Puerto Rico Electric Power Authority (“PREPA”), a public corporation and governmental agency of the Commonwealth of Puerto Rico. PREPA’s credit strength and ability to make timely payments had been impacted by the economic conditions in Puerto Rico. The loan was scheduled to mature in November 2017, but the issuer deferred payment until March 2018. Based on this deferral request and the uncertainty regarding repayment, management had concluded that an allowance for credit losses should be established on the loan to reduce its carrying value to $0 at December 31, 2017. In the first quarter of 2018, the remaining principal balance on the loan was repaid, and the Company recognized an $807,000 realized investment gain associated with the repayment.

The Company’s bank loan portfolio includes loans to oil and gas companies in the energy sector. The market values of these loans were previously impacted by declining energy prices. At March 31, 2018, the Company’s oil and gas exposure in the bank loan portfolio was in three loans with a carrying value of $4.7 million and an unrealized loss of $143,000. All of the loans were current at March 31, 2018. Management concluded that two of these loans were impaired as of March 31, 2018. At March 31, 2018, the two impaired loans had a carrying value of $1.7 million, unpaid principal of $2.1 million and an allowance for credit losses of $300,000.

At March 31, 2018, 99.9% of the Company’s fixed maturity security portfolio was rated “BBB-” or better (“investment grade”) by Standard & Poor’s or received an equivalent rating from another nationally recognized rating agency. Fixed maturity securities with ratings below investment grade by Standard & Poor’s or another nationally recognized rating agency at March 31, 2018 had an aggregate fair value of $868,000 and an aggregate net unrealized loss of $26,000.

Management concluded that none of the fixed maturity securities with an unrealized loss at March 31, 2018 experienced an other-than-temporary impairment. Management does not intend to sell available-for-sale securities in an unrealized loss position, and it is not “more likely than not” that the Company will be required to sell these securities before a recovery in their value to their amortized cost basis occurs.

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The amortized cost and fair value of our investments in available-for-sale securities were as follows:

	March 31, 2018						December 31, 2017
	Cost or Amortized Cost		Fair Value		% of Total Fair Value		Cost or Amortized Cost		Fair Value		% of Total Fair Value
	($ in thousands)
Fixed maturity securities:
State and municipal	$	137,478	$	139,725	12.4	%	$	139,382	$	144,366	13.1	%
Residential mortgage-backed	186,279		181,098		16.0	%	160,379		158,661		14.4	%
Corporate	445,058		439,626		38.9	%	408,857		413,721		37.7	%
Commercial mortgage and asset-backed	192,941		190,804		16.9	%	182,595		182,611		16.6	%
Obligations of U.S. government corporations and agencies	7,804		7,775		0.7	%	35,948		35,847		3.3	%
U.S. Treasury securities and obligations guaranteed by the U.S. government	83,317		82,219		7.3	%	79,476		78,874		7.2	%
Redeemable preferred stock	2,025		2,004		0.2	%	2,025		2,018		0.2	%
Total	1,054,902		1,043,251		92.4	%	1,008,662		1,016,098		92.5	%
Equity securities:
Preferred stock	61,287		67,710		6.0	%	59,102		66,281		6.0	%
Common stock	19,177		18,247		1.6	%	16,216		16,241		1.5	%
Total	80,464		85,957		7.6	%	75,318		82,522		7.5	%
Total investments	$	1,135,366	$	1,129,208	100.0	%	$	1,083,980	$	1,098,620	100.0	%

The following table sets forth the composition of the Company’s portfolio of fixed maturity securities (both available-for-sale and trading) by rating as of March 31, 2018:

Standard & Poor’s or Equivalent Designation	Fair Value		% of Total
	($ in thousands)
AAA	$	193,381	18.5	%
AA	407,937		39.0	%
A	335,631		32.0	%
BBB	109,240		10.4	%
BB	—		—
Below BB and unrated	867		0.1	%
Total	$	1,047,056	100.0	%

At March 31, 2018, our portfolio of fixed maturity securities contained corporate fixed maturity securities (both available-for-sale and trading) with a fair value of $439.6 million. A summary of these securities by industry segment is shown below as of March 31, 2018: 

Industry	Fair Value		% of Total
	($ in thousands)
Industrials and Other	$	170,025	38.7	%
Consumer Discretionary	76,510		17.4	%
Financial	73,696		16.8	%
Health Care	63,910		14.5	%
Utilities	55,485		12.6	%
Total	$	439,626	100.0	%

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Corporate fixed maturity securities (both available-for-sale and trading) include publicly traded securities and privately placed bonds as shown below as of March 31, 2018:

Public/Private	Fair Value		% of Total
	($ in thousands)
Publicly traded	$	407,739	92.7	%
Privately placed	31,887		7.3	%
Total	$	439,626	100.0	%

The amortized cost and fair value of our available-for-sale investments in fixed maturity securities summarized by contractual maturity are as follows:

	March 31, 2018
	Amortized Cost		Fair Value		% of Total Value
	($ in thousands)
Due in:
One year or less	$	33,850	$	33,743	3.2	%
After one year through five years	327,069		323,368		31.0	%
After five years through ten years	185,400		181,026		17.3	%
After ten years	127,338		131,208		12.6	%
Residential mortgage-backed	186,279		181,098		17.4	%
Commercial mortgage and asset-backed	192,941		190,804		18.3	%
Redeemable preferred stock	2,025		2,004		0.2	%
Total	$	1,054,902	$	1,043,251	100.0	%

At March 31, 2018, the Company had no investments in securitizations of alternative-A mortgages or sub-prime mortgages.

Interest Expense

Interest expense was $2.5 million and $2.1 million for the three months ended March 31,2018 and 2017, respectively, reflecting an increase in LIBOR rates from the prior year and a $10.0 million increase in Senior Debt outstanding. See “—Liquidity and Capital Resources—Sources and Uses of Funds” for more information regarding our senior bank debt facility and trust preferred securities.

Amortization of Intangibles

The Company recorded $149,000 of amortization of intangible assets for each of the three months ended March 31, 2018 and 2017, respectively. 

Income Tax Expense

Our effective tax rate fluctuates from period to period based on the relative mix of income reported by country and the respective tax rates imposed by each tax jurisdiction. For the three months ended March 31, 2018, our U.S. federal income tax expense was 8.7% of income before taxes compared to 7.7% for the three months ended March 31, 2017. For U.S.-sourced income, the Company’s U.S. federal income tax expense differs from the amounts computed by applying the federal statutory income tax rate to income before taxes due primarily to interest income on tax-advantaged state and municipal securities (state and municipal securities represent 12.4% and 10.9% of our available-for-sale securities at March 31, 2018 and 2017, respectively), dividends received income, and excess tax benefits on share based compensation. Income tax expense for the three months ended March 31, 2018 reflect both the reduction in the enacted U.S. Federal tax rate from 35% in 2017 to 21% in 2018 as result of the Public Law No. 115-97, informally titled the Tax Cuts and Jobs Act (the “Tax Act”) and the changes in our organizational structure in response to the Tax Act.

In response to the Tax Act, we made changes to our structure in 2018 to minimize the impact of the base erosion and anti-abuse tax (“BEAT”) that included the formation of Carolina Re, a Bermuda-domiciled, wholly-owned subsidiary of James River Group, Inc. Carolina Re is a Class 3A reinsurer and made an irrevocable election to be taxed as a U.S. domestic corporation under Section 953(d) of the Code. Effective January 1, 2018, we generally discontinued ceding 70% of our U.S.-written premiums to JRG Re and instead ceded 70% of our U.S.-written premiums to Carolina Re. Carolina Re also entered into a stop loss reinsurance agreement with JRG Re. While Carolina Re is subject to U.S. corporate income tax, we will not be subject to BEAT in 2018 if we have sufficient regular U.S. income tax liability compared to the BEAT liability. The applicability of BEAT depends on a number of factors, and it is uncertain whether we will be subject to BEAT in future periods.

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Financial results reflect provisional amounts related to the December 2017 enactment of the TCJA. These provisional estimates are based on the Company’s initial analysis and current interpretation of the legislation. Given the complexity of the legislation, anticipated guidance from the U.S. Treasury, and the potential for additional guidance from the SEC or the Financial Accounting Standards Board, these estimates may be adjusted during 2018.

LIQUIDITY AND CAPITAL RESOURCES

Sources and Uses of Funds

We are organized as a Bermuda holding company with our operations conducted by our wholly-owned subsidiaries. Accordingly, our holding company may receive cash through loans from banks, issuance of equity and debt securities, corporate service fees or dividends received from our subsidiaries, and/or other transactions. Our U.S. holding company may receive cash in a similar manner and also through payments from our subsidiaries pursuant to our U.S. consolidated tax allocation agreement.

The payment of dividends by our subsidiaries to us is limited by statute. In general, the laws and regulations applicable to our domestic insurance subsidiaries limit the aggregate amount of dividends or other distributions that they may declare or pay within any 12-month period without advance regulatory approval. Generally, the limitations are based on the greater of statutory net income for the preceding year or 10.0% of statutory surplus at the end of the preceding year. In addition, insurance regulators have broad powers to prevent the reduction of statutory surplus to inadequate levels and could refuse to permit the payment of dividends calculated under any applicable formula. The maximum amount of dividends and return of capital available to us from JRG Re in 2018 is calculated to be approximately $102.3 million. However, any dividend payment is contingent upon continued compliance with Bermuda regulatory requirements, including but not limited to the enhanced solvency requirement calculations. The maximum amount of dividends available to the U.S. holding company from our U.S. insurance subsidiaries during 2018 without regulatory approval is $37.0 million.

At March 31, 2018, the Bermuda holding company had $2.2 million of cash and cash equivalents. The U.S. holding company had $58.0 million of cash and invested assets, comprised of cash and cash equivalents of $4.2 million, fixed maturity securities of $3.8 million, short-term investments of $1.3 million, and other invested assets of $48.7 million, which are not subject to regulatory restrictions. Additionally, our U.K. intermediate holding company had no invested assets and cash of less than ten thousand dollars at March 31, 2018.

Our net written premium to surplus ratio (defined as the ratio of net written premiums to regulatory capital and surplus) is reviewed by management as well as our rating agency as a component of leverage and efficiency of deployed capital. For the three months ended March 31, 2018 and 2017, our annualized net written premium to surplus ratio was 1.3 to 1.0 and 1.0 to 1.0, respectively.

The Company has a $215.0 million senior revolving credit facility (the “Facility”). The Facility is comprised of the following at March 31, 2018:

• A $102.5 million secured revolving facility used by JRG Re to issue letters of credit for the benefit of third-party reinsureds. This portion of our credit facility is secured by our investment securities. At March 31, 2018, the Company had $98.6 million of letters of credit issued under the secured facility.

• A $112.5 million unsecured revolving facility to meet the working capital needs of the Company. All unpaid principal on the revolver is due at maturity. Interest accrues quarterly and is payable in arrears at 3-month LIBOR plus a margin which is currently 1.5% and is subject to change according to terms in the credit agreement. At March 31, 2018, the Company had a drawn balance of $73.3 million outstanding on the unsecured revolver.

The facility has been amended from time to time since its inception in 2013. On December 7, 2016, the Company entered into an Amended and Restated Credit Agreement for the Facility which, among other things, extended the maturity date of the Facility until December 7, 2021 and modified other terms including reducing the rate of interest and reducing the number of financial covenants. On June 8, 2017, the Company entered into a First Amendment to the Facility, which among other things, modified the financial covenants and increased the amount of additional debt the Company may incur under new financings, subject to compliance with certain conditions.

The senior revolving credit facility contains certain financial and other covenants (including risk-based capital, minimum shareholders’ equity levels, maximum ratios of total debt outstanding to total capitalization and minimum fixed charge coverage ratios) with which the Company is in compliance at March 31, 2018.

On August 2, 2017, the Company, and its wholly-owned subsidiary, JRG Re, together as borrowers, entered into a credit agreement that provides the Company with a revolving line of credit of up to $100 million, which may be used for loans and letters of credit made or issued, at the borrowers' option, on a secured or unsecured basis. Obligations under the credit agreement will carry a variable rate of interest subject to terms in the credit agreement and will mature 30 days after notice of termination from the lender. The credit agreement contains certain financial and other covenants with which we are in compliance at March 31, 2018. The loans and letters of credit made or issued under the revolving line of credit may be used to finance the borrowers' general

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corporate purposes. At March 31, 2018, unsecured loans of $10.0 million and secured letters of credit totaling $6.9 million were outstanding on the facility.

In May 2004, we issued $15.0 million of senior debt due April 29, 2034, with net proceeds to us of $14.5 million. The senior debt is not redeemable by the holder or subject to sinking fund requirements. Interest accrues quarterly and is payable in arrears at a floating rate per annum equal to the 3-month LIBOR plus 3.85%. This senior debt is redeemable at par prior to its stated maturity at our option in whole or in part. The terms of the senior debt contain certain covenants, with which we are in compliance at March 31, 2018, and which, among other things, restrict our ability to assume senior indebtedness secured by our U.S. holding company’s common stock or its subsidiaries’ capital stock or to issue shares of its subsidiaries’ capital stock.

We sold trust preferred securities through five Delaware statutory trusts sponsored and wholly-owned by the Company or its subsidiaries. Each trust used the net proceeds from the sale of its trust preferred securities to purchase our floating-rate junior subordinated debt.

The following table summarizes the nature and terms of the junior subordinated debt and trust preferred securities outstanding at March 31, 2018 (including the Company’s repurchases of a portion of these trust preferred securities):

	James River Capital Trust I		James River Capital Trust II		James River Capital Trust III		James River Capital Trust IV		Franklin Holdings II (Bermuda) Capital Trust I
	($ in thousands)
Issue date	May 26, 2004		December 15, 2004		June 15, 2006		December 11, 2007		January 10, 2008
Principal amount of trust preferred securities		$7,000		$15,000		$20,000		$54,000		$30,000
Principal amount of junior subordinated debt		$7,217		$15,464		$20,619		$55,670		$30,928
Carrying amount of junior subordinated debt net of repurchases		$7,217		$15,464		$20,619		$44,827		$15,928
Maturity date of junior subordinated debt, unless accelerated earlier	May 24, 2034		December 15, 2034		June 15, 2036		December 15, 2037		March 15, 2038
Trust common stock		$217		$464		$619		$1,670		$928
Interest rate, per annum	Three-Month LIBOR plus 4.0%		Three-Month LIBOR plus 3.4%		Three-Month LIBOR plus 3.0%		Three-Month LIBOR plus 3.1%		Three-Month LIBOR plus 4.0%

All of the junior subordinated debt is currently redeemable at 100.0% of the unpaid principal amount at our option.

The junior subordinated debt contains certain covenants with which we are in compliance as of March 31, 2018.

At March 31, 2018 and December 31, 2017, the ratio of total debt outstanding, including both senior debt and junior subordinated debt, to total capitalization (defined as total debt plus total stockholders’ equity) was 22.8% and 22.6%, respectively. Having debt as part of our capital structure allows us to generate a higher return on equity and greater book value per share results than we could by using equity capital alone.

Ceded Reinsurance

Our insurance segments enter into reinsurance contracts to limit our exposure to potential losses arising from large risks, to protect against the aggregation of several risks in a common loss occurrence, and to provide additional capacity for growth. Our reinsurance is contracted under excess of loss and quota share reinsurance contracts. In excess of loss reinsurance, the reinsurer agrees to assume all or a portion of the ceding company’s losses in excess of a specified amount. The premiums payable to the reinsurer are negotiated by the parties based on their assessment of the amount of risk being ceded to the reinsurer because the reinsurer does not share proportionately in the ceding company’s losses. In quota share reinsurance, the reinsurer agrees to assume a specified percentage of the ceding company’s losses arising out of a defined class of business in exchange for a corresponding percentage of premiums. For the three months ended March 31, 2018 and 2017, our net premium retention was 70.8% and 70.4%, respectively.

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The following is a summary of our Excess and Surplus Lines segment’s ceded reinsurance in place as of March 31, 2018:

	Company Retention
Casualty
Primary Specialty Casualty,  including Professional Liability	Up to $1.0 million per occurrence, subject to a $1.0 million aggregate deductible.
Primary Casualty	Up to $2.0 million per occurrence. (1)
Excess Casualty	Up to $1.0 million per occurrence. (2)
Property	Up to $5.0 million per event. (3)

(1) Total exposure to any one claim is generally $1.0 million.

(2) For policies with an occurrence limit of $1.0 million or higher, the excess casualty treaty is set such that our retention is $1.0 million or less. For policies where we also write an underlying primary casualty policy, the net excess casualty limit is added to the primary limit and the retention remains the same at $1.0 million.

(3) The property catastrophe reinsurance treaty has a limit of $40.0 million with one reinstatement.

In our Excess and Surplus Lines segment, we write a small book of excess property insurance, but we do not write primary property insurance. The Excess and Surplus Lines segment has a surplus share reinsurance treaty in effect that was specifically designed to cover property risks. The surplus share treaty along with facultative reinsurance helps ensure that our net retained limit per risk will be $5.0 million or less.

We use catastrophe modeling software to analyze the risk of severe losses from hurricanes and earthquakes on our exposure. We utilize the model in our risk selection, pricing, and to manage our overall portfolio probable maximum loss (“PML”) accumulations. A PML is an estimate of the amount we would expect to pay in any one catastrophe event within a given annual probability of occurrence (i.e. a return period or loss exceedance probability). Based upon the modeling of our Excess and Surplus Lines segment, a $45.0 million gross catastrophe loss would exceed our 1 in 1,000 year PML. In the event of a $45.0 million gross property catastrophe loss to the Excess and Surplus Lines segment, we estimate our pre-tax cost at approximately $7.4 million, including reinstatement premiums and net retentions. In addition to this retention, we would retain any losses in excess of our reinsurance coverage limits.

Our Specialty Admitted Insurance segment purchases reinsurance for at least 50% of the exposed limits on specialty admitted property-casualty business. The segment enters into reinsurance contracts for the individual risk workers’ compensation business as well as fronting and program business. While the segment focuses on casualty business, incidental property risk is incurred in the fronting and program business. The segment is covered for $44.0 million in excess of $1.0 million per occurrence to manage its property exposure to an approximate 1 in 1,000 year PML.

The following is a summary of our Specialty Admitted Insurance segment’s ceded reinsurance in place as of March 31, 2018:

Line of Business	Coverage
Casualty
Workers’ Compensation	Excess of loss coverage for $29.4 million in excess of $600,000. (1)
Workers’ Compensation – Program	Quota share coverage for 50% of the first $600,000 per occurrence. (1)(2)
Commercial Auto – Program	Quota share coverage for 75% of $1.0 million per occurrence.
Commercial Auto – 3 Programs	Quota share coverage for 90% of $1.0 million per occurrence.
Professional Liability – Program	Quota share coverage for 77.5% of $1.0 million per occurrence.
General Liability – Program	Quota share coverage for 90% of the first $1.0 million per occurrence and excess of loss coverage for $1.0 million in excess of $1.0 million per occurrence.
Property	Excess of loss coverage for $44.0 million in excess of $1.0 million.

(1) Excluding one program which has quota share coverage for 90% of the first $1.0 million per occurrence and excess of loss coverage for $49.0 million in excess of $1.0 million.

(2) Includes individual risk expansion states and any residual market pools.

In our Casualty Reinsurance segment, we also have limited property catastrophe exposure.

In the aggregate, we believe our pre-tax group-wide PML from a 1 in 1,000 year property catastrophe event would not exceed $10.0 million, inclusive of reinstatement premiums payable.

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We also have a clash and contingency reinsurance treaty to cover both the Excess and Surplus Lines and Specialty Admitted Insurance segments in the event of a claims incident involving more than one of our insureds. The treaty covers $6.0 million in excess of a $2.0 million retention for loss occurrences within the treaty term. This coverage has two reinstatements in the event we exhaust any of the coverage.

The Company’s insurance segments remain liable to policyholders if its reinsurers are unable to meet their contractual obligations under applicable reinsurance agreements. We establish allowances for amounts considered uncollectible. At March 31, 2018, there was no allowance for such uncollectible reinsurance recoverables. To minimize exposure to significant losses from reinsurance insolvencies, the Company evaluates the financial condition of its reinsurers and monitors concentrations of credit risk. The Company generally seeks to purchase reinsurance from reinsurers with A.M. Best financial strength ratings of “A-” (Excellent) or better. The Company’s reinsurance contracts generally require reinsurers that are not authorized as reinsurers under U.S. state insurance regulations or that experience rating downgrades from rating agencies below specified levels to fund their share of the Company’s ceded outstanding losses and loss adjustment expense reserves, typically through the use of irrevocable and unconditional letters of credit. In fronting arrangements, which the Company conducts through its Specialty Admitted Insurance segment, we are subject to credit risk with regard to insurance companies who act as reinsurers for us in such arrangements. We customarily require a collateral trust arrangement to secure the obligations of the insurance entity for whom we are fronting.

At March 31, 2018, we had reinsurance recoverables on unpaid losses of $331.2 million and reinsurance recoverables on paid losses of $16.5 million, and all material recoverable amounts were from companies with A.M. Best ratings of “A-” or better or collateral had been posted by the reinsurer for our benefit.

Credit Risk on Amounts Recoverable from an Indemnifying Party

The Company is also exposed to credit risk relating to a set of insurance contracts with an insured group of companies under which the Company pays losses and loss adjustment expenses on the contract. The Company has indemnity agreements with this group of insured parties (non-insurance entities) and is contractually entitled to receive reimbursement for a significant portion of the losses and loss adjustment expenses paid on behalf of the insured parties and other expenses incurred by the Company. The insured parties are required to collateralize all amounts currently due to the Company and to provide additional collateral sufficient to cover the amounts that may be recoverable under the indemnity agreements, including among other things case loss and loss adjustment expense reserves, IBNR loss and loss adjustment expense reserves, extra contractual obligations and excess of policy limits liabilities. This collateral is currently provided through a collateral trust arrangement established in favor of the Company by a captive insurance company affiliate of the insured group. At March 31, 2018, the cash equivalent collateral held in the collateral trust arrangement was approximately $860.6 million, which exceeds the amount of claims receivable and unpaid reported losses and loss adjustment expenses outstanding. This is a rapidly growing relationship, and as such, there is ongoing exposure to estimated losses and expenses on these contracts growing at a faster pace than growth in our collateral balances. In addition, we have credit exposure if our estimates of future losses and loss adjustment expenses and other amounts recoverable, which are the basis for establishing collateral balances, are lower than actual amounts paid or payable. The amount of our credit exposure in any of these instances could be material. To mitigate these risks, we closely and frequently monitor our exposure compared to our collateral held, and we request additional collateral when our analysis indicates that we have uncollateralized exposure.

Cash Flows

Our sources of funds consist primarily of premiums written, investment income, reinsurance recoveries and proceeds from offerings of debt and equity securities and from sales and redemptions of investments. We use operating cash flows primarily to pay operating expenses, losses and loss adjustment expenses, and income taxes. The following table summarizes our cash flows:

	Three Months Ended March 31,
	2018			2017
	($ in thousands)
Cash and cash equivalents provided by (used in):
Operating activities	$	48,461		$	16,112
Investing activities	(53,244		)	(22,067		)
Financing activities	(7,666		)	(9,605		)
Change in cash and cash equivalents	$	(12,449	)	$	(15,560	)

Cash provided by operating activities increased from $16.1 million for the three months ended March 31, 2017 to $48.5 million for the three months ended March 31, 2018. The growth in cash provided by operating activities reflects a $53.1 million increase in net written premium for the three months ended March 31, 2018 compared to the same period in 2017. In addition, the growth in reserves for losses and loss adjustment exceeded the growth in premiums receivable by $38.2 million for the three months ended March 31, 2018 compared to $3.0 million in the three months ended March 31, 2017. The fact that we are collecting

43

premiums receivable at a quicker rate than we are paying loss and loss adjustment expenses has a favorable impact on our cash provided by operating activities for the three months ended March 31, 2018 compared to the three months ended March 31, 2017.

Cash used in financing activities in the three months ended March 31, 2018 included $9.1 million of dividends paid to shareholders. Cash used in financing activities in the three months ended March 31, 2017 included $8.9 million of dividends paid to shareholders. 

Ratings

The A.M. Best financial strength rating for our group’s regulated insurance subsidiaries is “A” (Excellent). This rating reflects A.M. Best’s opinion of our insurance subsidiaries’ financial strength, operating performance and ability to meet obligations to policyholders and is not an evaluation directed towards the protection of investors. The rating for our operating insurance and reinsurance companies of “A” (Excellent) is the third highest rating of the thirteen ratings issued by A.M. Best and is assigned to insurers that have, in A.M. Best’s opinion, an excellent ability to meet their ongoing obligations to policyholders.

The financial strength ratings assigned by A.M. Best have an impact on the ability of our regulated subsidiaries to attract and retain agents and brokers and on the risk profiles of the submissions for insurance that our subsidiaries receive. The “A” (Excellent) ratings assigned to our insurance and reinsurance subsidiaries are consistent with our business plans and we believe allow our subsidiaries to actively pursue relationships with the agents and brokers identified in their marketing plans.

EQUITY

Equity Awards

For the three months ended March 31, 2018 and 2017, the Company recognized $1.5 million and $1.8 million, respectively, of share based compensation expense. The amount of unrecognized share based compensation expense to be recognized over the remaining weighted-average service period of 2.3 years at March 31, 2018 is $14.0 million. There were 142,129 and 97,211 options exercised during the three months ended March 31, 2018 and 2017, respectively. Additionally, 62,714 and 37,485 RSUs vested during the three months ended March 31, 2018 and 2017, respectively. The Company granted 214,907 and 117,879 RSUs during the three months ended March 31, 2018 and 2017, respectively. The RSUs vest over one to three years. The Company did not grant any options during the three months ended March 31, 2018. The Company granted 195,509 options with a weighted-average exercise price of $42.17 during the three months ended March 31, 2017.

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RECONCILIATION OF NON-GAAP MEASURES

Reconciliation of Underwriting Profit

We believe that the disclosure of underwriting profit by individual segment and of the Company as a whole is useful to investors, analysts, rating agencies and other users of our financial information in evaluating our performance because our objective is to consistently earn underwriting profits. We evaluate the performance of our segments and allocate resources based primarily on underwriting profit. Our definition of underwriting profit may not be comparable to that of other companies.

The following table reconciles the underwriting profit by individual segment and for the entire Company to consolidated income before U.S. Federal income taxes:

	Three Months Ended March 31,
	2018			2017
	($ in thousands)
Underwriting profit of the operating segments:
Excess and Surplus Lines	$	11,299		$	8,800
Specialty Admitted Insurance	1,623			842
Casualty Reinsurance	1,744			1,093
Total underwriting profit of operating segments	14,666			10,735
Other operating expenses of the Corporate and Other segment	(7,431		)	(6,461		)
Underwriting profit (1)	7,235			4,274
Net investment income	13,256			16,733
Net realized investment (losses) gains	(810		)	1,047
Amortization of intangible assets	(149		)	(149		)
Other income and expenses	104			200
Interest expense	(2,522		)	(2,123		)
Income before taxes	$	17,114		$	19,982

(1) Included in underwriting results for the three months ended March 31, 2018 and 2017 is gross fee income of $8.2 million and $5.9 million, respectively.

Reconciliation of Adjusted Net Operating Income

We define adjusted net operating income as net income excluding certain non-operating expenses such as net realized investment gains and losses, expenses related to due diligence costs for various merger and acquisition activities, severance costs associated with terminated employees and interest and other expenses on a leased building that we are deemed to own for accounting purposes. We use adjusted net operating income as an internal performance measure in the management of our operations because we believe it gives our management and other users of our financial information useful insight into our results of operations and our underlying business performance. Adjusted net operating income should not be viewed as a substitute for net income calculated in accordance with GAAP, and our definition of adjusted net operating income may not be comparable to that of other companies.

Our income before taxes and net income for the three months ended March 31, 2018 and 2017 reconcile to our adjusted net operating income as follows:

	Three Months Ended March 31,
	2018				2017
	Income Before Taxes		Net Income		Income Before Taxes			Net Income
	($ in thousands)
Income as reported	$	17,114	$	15,633	$	19,982		$	18,450
Net realized investment losses (gains)	810		665		(1,047		)	(834		)
Other expenses	4		20		(114		)	(100		)
Interest expense on leased building the Company is deemed to own for accounting purposes	318		251		312			203
Adjusted net operating income	$	18,246	$	16,569	$	19,133		$	17,719

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Tangible Equity (per Share) and Pre Dividend Tangible Equity (per Share)

One of our key financial measures that we use to assess our longer term financial performance is our percentage growth in tangible equity per share and return on tangible equity. We believe tangible equity is a good measure to evaluate the strength of our balance sheet and to compare returns relative to this measure. For the three months ended March 31, 2018, our tangible equity per share decreased by 2.4%. Absent the $9.0 million in dividends to shareholders in the three months ended March 31, 2018, our tangible equity per share decreased by 0.6% for the three months ended March 31, 2018. Our operating return on tangible shareholders’ equity was 14.1% for the three months ended March 31, 2018.

We define tangible equity as the sum of shareholders’ equity less goodwill and intangible assets (net of amortization). Our definition of tangible equity may not be comparable to that of other companies, and it should not be viewed as a substitute for shareholders’ equity calculated in accordance with GAAP. The following table reconciles shareholders’ equity to tangible equity as of March 31, 2018 and December 31, 2017 and reconciles tangible equity to tangible equity before dividends as of March 31, 2018:

	March 31, 2018				December 31, 2017
	Equity		Equity per Share		Equity		Equity per Share
	($ in thousands, except share amounts)
Shareholders’ equity	$	685,770	$	22.96	$	694,699	$	23.39
Less:
Goodwill	181,831		6.09		181,831		6.12
Intangible assets	38,185		1.28		38,334		1.29
Tangible equity	$	465,754	$	15.59	$	474,534	$	15.98
Dividends to shareholders for the three months ended March 31, 2018	9,049		0.30
Pre-dividend tangible equity	$	474,803	$	15.89

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Market risk is the risk of economic losses due to adverse changes in the estimated fair value of a financial instrument as the result of changes in equity prices, interest rates, foreign currency exchange rates and commodity prices. Our consolidated balance sheets include assets and liabilities with estimated fair values that are subject to market risk. Our primary market risks have been interest rate risk associated with investments in fixed maturities and equity price risk associated with investments in equity securities. We do not have material exposure to foreign currency exchange rate risk or commodity risk.

There have been no material changes in market risk from the information provided in Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2017.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in the reports we file under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), as appropriate, to allow timely decisions regarding required financial disclosure. In connection with the preparation of this quarterly report on Form 10-Q, our management carried out an evaluation, under the supervision and with the participation of our management, including the CEO and CFO, as of March 31, 2018, of the effectiveness of the design and operation of our disclosure controls and procedures, as such term is defined under Rule 13a-15(e) and 15d-15(e) under the Exchange Act. Based upon this evaluation, our CEO and CFO concluded that our disclosure controls and procedures were effective as of March 31, 2018.

Changes in Internal Controls over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during our quarter ended March 31, 2018 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations on Effectiveness of Controls

The effectiveness of any system of controls and procedures is subject to certain limitations, and, as a result, there can be no assurance that our controls and procedures will detect all errors or fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system will be attained.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

We are party to legal proceedings which arise in the ordinary course of business. We believe that the outcome of such matters, individually and in the aggregate, will not have a material adverse effect on our consolidated financial position.

Item 1A. Risk Factors

There have been no material changes in our risk factors in the quarter ended March 31, 2018 from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2017.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other information

None.

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Item 6. Exhibits

Exhibit Number	Description
3.1	Certificate of Incorporation of James River Group Holdings, Ltd. (incorporated by reference to Exhibit 3.1 of the Registration Statement on Form S-1, Registration No. 333-199958, filed with the Commission on November 7, 2014)
3.2	Certificate of Incorporation on Change of Name (incorporated by reference to Exhibit 3.2 of the Registration Statement on Form S-1, Registration No. 333-199958, filed with the Commission on November 7, 2014)
3.3	Memorandum of Association of James River Group Holdings, Ltd. (incorporated by reference to Exhibit 3.3 of the Registration Statement on Form S-1, Registration No. 333-199958, filed with the Commission on November 7, 2014)
3.4	Certificate of Deposit of Memorandum of Increase of Share Capital, dated December 24, 2007 (incorporated by reference to Exhibit 3.4 of the Registration Statement on Form S-1, Registration No. 333-199958, filed with the Commission on November 7, 2014)
3.5	Certificate of Deposit of Memorandum of Increase of Share Capital, dated October 7, 2009 (incorporated by reference to Exhibit 3.5 of the Registration Statement on Form S-1, Registration No. 333-199958, filed with the Commission on November 7, 2014)
3.6	Third Amended and Restated Bye-Laws of James River Group Holdings, Ltd. (incorporated by reference to Exhibit 3.6 to the Annual Report on Form 10-K filed on March 12, 2015, Commission File No. 001-36777)
10.1	Employment Agreement, dated April 2, 2018, between Steven Hartman and James River Group, Inc.*
10.2	Employment Agreement, dated April 13, 2018, between Dennis Johnson and James River Group, Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on April 16, 2018, Commission File No. 001-36777)*
10.3	Termination of Employment Agreement, dated April 13, 2018, between Dennis Johnson and JRG Reinsurance Company Ltd. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on April 16, 2018, Commission File No. 001-36777)*
31.1	Chief Executive Officer Certification pursuant to Rule 13a-14(a)/15d-14(a)
31.2	Chief Financial Officer Certification pursuant to Rule 13a-14(a)/15d-14(a)
32	Chief Executive Officer and Chief Financial Officer Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

 * Denotes a management contract or compensatory plan or arrangement.

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Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		James River Group Holdings, Ltd.
Date:	May 4, 2018	By:	/s/ Robert P. Myron
			Robert P. Myron
			President and Chief Executive Officer
			(Principal Executive Officer)
Date:	May 4, 2018	By:	/s/ Sarah C. Doran
			Sarah C. Doran
			Chief Financial Officer
			(Principal Financial Officer)

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EX-10.1

Exhibit 10.1

James River Group, Inc.

1414 Raleigh Road, Suite 405,

Chapel Hill, NC 27517

April 2, 2018

Mr. Steven Hartman

Dear Steve:

The purpose of this letter (the “Agreement”) is to confirm that we have agreed to amend and restate as of the Effective Date (as hereinafter defined) our prior agreement with respect to the terms of your employment by James River Group, Inc. (the “Parent Company”) to serve as President and Chief Executive Officer of Parent Company subsidiaries Stonewood Insurance Company (“SIC”), Falls Lake Insurance Management Company, Inc. (“FLIMCO”), Falls Lake National Insurance Company (formerly Stonewood National Insurance Company), Falls Lake General Insurance Company, and Falls Lake Fire and Casualty Company(together, the “Companies”). In consideration of the mutual promises contained in this Agreement, the parties to this Agreement hereby agree as follows:

1.EMPLOYMENT AND TERM. Effective as of March 1, 2018 (the “Effective Date”), the Companies each agrees to continue to employ you (the “Executive”) as its President and Chief Executive Officer, and Executive hereby accepts such continued employment on the terms hereinafter set forth. The term of this Agreement shall commence as of the Effective Date and end on December 31, 2019, subject to the termination provisions of Section 6. The term of this Agreement shall thereafter be automatically renewed for additional one year periods unless written notice to the contrary shall be given by the Parent Company or Executive to the other party not less than ninety (90) days prior to the end of the initial or any renewal term that the term shall not thereafter be renewed (“Non-Renewal Notice”), subject to the termination provisions of Section 6. The initial term plus any renewals thereof shall hereafter be referred to as the “Term.”

2.COMPENSATION.

(a)Salary. Executive shall be paid a base salary of not less than four hundred ninety seven thousand four hundred seventy four dollars and eighty eight cents ($497,474.88) per year, payable in periodic installments by FLIMCO in accordance with its normal payroll practices.

(b)Bonus. For each fiscal year during the Term in which Executive is employed by the Company as of the last day of such fiscal year, Executive shall be eligible to receive a discretionary bonus (each, a “Bonus”) in an amount as the Board of Directors of the Parent Company (the “Board”) (other than Executive, if Executive is a member of the Board), in its discretion, may determine based on Executive’s performance during such fiscal year. Any Bonus awarded for a fiscal year shall be paid by FLIMCO at the time or times provided by the Parent Company bonus plan in effect for such fiscal year.

(c)Vacation, Benefits. During the Term Executive shall also be entitled to participate in all employee benefit plans, to other fringe benefits generally available to executive employees of the Parent Company and its subsidiaries at the employer’s expense. Executive will be entitled to a total of four (4) weeks of paid vacation per annum (not subject to carry over to subsequent years), which will be pro-rated for the first and last year of the Term;

(d)Expense Reimbursements. Executive will be entitled to business expense reimbursement for all reasonable business expenses upon the presentation of reasonably itemized statements of such expenses in accordance with the Companies’ policies and procedures. The amount of expenses eligible for reimbursement during any tax year of Executive shall not affect the expenses eligible for reimbursement in any other tax year. The right to reimbursement provided in this Agreement is not subject to liquidation or exchange for another benefit. In no event shall the reimbursement of an eligible expense occur later than the earlier of (i) six (6) months from the date of incurrence and (ii) the end of the calendar year following the calendar year in which such expense was incurred.

(e)Withholdings and Deductions. All payments and compensation under this Agreement shall be subject to all required federal, state and local withholdings and deductions, and such deductions as Executive may instruct FLIMCO to take that are authorized by applicable law.

(f)Claw-Back. Executive acknowledges that to the extent required by applicable law or written company policy adopted by the Board to implement the requirements of such law (including without limitation Section 304 of the Sarbanes Oxley Act and Section 954 of the Dodd Frank Act), any bonus and other incentive compensation (if any) shall be subject to any clawback, forfeiture, recoupment or similar requirement (“Clawback Rights”) as the Board may determine in its sole discretion is necessary or desirable to implement such law or policy. The Company may only exercise Clawback Rights with respect to any bonus and other incentive compensation received during the three completed fiscal years immediately preceding the date on which the Company is required to prepare an accounting restatement and, if applicable, any transition period resulting from a change in fiscal year within or immediately following the three completed fiscal years.

3.DUTIES. Executive shall report exclusively and directly to the Chief Executive Officer of the Parent Company (“CEO”), and to the Boards of Directors of the Companies (the “Companies Boards”). Executive shall perform all duties normally associated with the position of President and Chief Executive Officer, and such other reasonable duties as may be assigned to him by the CEO, including without limitation overseeing subsidiaries of the Companies. Executive will devote his entire working time, attention, and energies to carrying out and fulfilling his duties and responsibilities under this Agreement. Executive agrees to abide by all policies applicable to employees of the Parent Company and the Companies adopted by their respective boards of directors. Executive represents that he is able and willing to engage routine business travel as is necessary to perform his duties as President and CEO and to further the Parent Company’s and the Companies’ business interests.

4.CONFIDENTIAL INFORMATION AND PRIVILEGED INFORMATION.

(a)Executive will not at any time during the Term or thereafter:

(i)reveal, divulge, or make known to any person, firm, or corporation or use for his personal benefit or the benefit of others (except the Companies, the Parent Company,James River Group Holdings, Ltd. (“Holdings”), and any of Holdings’ other direct or indirect subsidiaries (hereinafter referred to as “Affiliates,” and all of the foregoing, the “Holdings Group”)), directly or indirectly, any confidential or proprietary information received or developed by him during the course of his employment. For the purposes of this Section 4(a)(i) confidential and proprietary information (“Confidential Information”) shall be defined to mean (1) all historical and pro forma projections of loss ratios incurred by the Holdings Group; (2) all historical and pro forma actuarial data relating to the Holdings Group; (3) historical and pro forma financial results, revenue statements, and projections for the Holdings Group; (4) all information relating to the Holdings Group’s systems and software (other than the portion thereof provided by the vendor to all purchasers of such systems and software); (5) all information relating to SIC’s unique underwriting approach; (6) all information relating to plans for, or internal or external discussions regarding, acquisitions of or mergers with any business or line of business; (7) non-public business plans; (8) all other information relating to the financial, business, or other affairs of the Holdings Group including their customers; and (9) any information about any shareholder of Holdings or any of its Affiliates, or any of their officers or employees, that has been furnished or made available to Executive as a result of his position with the Companies. Section 4(a)(i) shall not apply to Executive following the termination of his employment with the Parent Company and the Companies with respect to any Confidential Information known or made generally available to the general public or within the industry by persons other than Executive or a person acting with or at the request of Executive; or

(ii)reveal, divulge, or make known to any person, firm, or corporation, or use for his personal benefit or the benefit of others (except the Holdings Group), directly or indirectly, the name or names of any Customers (as defined in Section 5 below) of the Holdings Group, nor will he reveal, divulge, or make known to any person, firm, or corporation or use for his personal benefit or the benefit of others (except the Holdings Group), directly or indirectly, any trade secrets or any knowledge or information concerning any business methods or operational procedures engaged in by the Holdings Group (collectively, “Privileged Information”); provided, however, the restrictions set forth in this Section 4(a)(ii) shall not apply to Executive following the termination of his employment with the Parent Company and the Companies with respect to any Privileged Information known or made generally available to the general public or within the industry by persons other than Executive or a person acting with or at the request of Executive.

(b)Notwithstanding any provision of this Agreement to the contrary, under 18 U.S.C. §1833(b), “An individual shall not be held criminally or civilly liable under any Federal or State trade secret law for the disclosure of a trade secret that (A) is made (i) in confidence to a Federal, State, or local government official, either directly or indirectly, or to an attorney; and (ii) solely for the purpose of reporting or investigating a suspected violation of law; or (B) is made in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal.” Nothing in this Agreement or any other policy of the Companies is intended to conflict with this statutory protection, and no director, officer, or member of management has the authority to impose any rule to the contrary.

5.NON-COMPETITION.

(a)Executive acknowledges and agrees that as the Companies’ President and CEO (i) he will be responsible for and directly involved in developing goodwill and relationships for the benefit of the Companies with Agents, Customers, and Fronting/Program Business Relationships (all as defined below), including personal contact with Agents, Customers, and Fronting/Program Business Relationships, and supervising others who develop and maintain Agent, Customer, and Fronting/Program Business Relationship goodwill and relationships; (ii) he will be provided and have access to the Holdings Group’s Confidential Information and Privileged Information, and will be compensated for the development, and supervising the development, of the same; (iii) he will be responsible for and directly involved in developing goodwill and relationships for the benefit of the Holdings Group with Fronting/Program Business Relationships; and (iv) he will have unique insight into and knowledge of the skills, talents and capabilities of the Companies’ key employees. Executive also acknowledges and agrees that at the inception of his employment with the Companies it was agreed that he would be bound by noncompetition restrictions.

(b)Executive agrees that during his employment by the Parent Company and the Companies he will not compete against the Holdings Group in any manner, including without limitation by engaging in, or by assisting any other person or entity to engage in, or by having an ownership interest in, any Competitive Business (as defined below) in the Territory (as defined below), or by engaging in any conduct described in clauses (b)(i), (ii), (iii), (iv), (v), (vi), (vii) or (viii) below. Executive further agrees that after his employment by the Parent Company and the Companies ends, he will not during the Restricted Period (as defined below):

(i)be employed in any management, customer relationship or sales capacity by any insurance company that engages in Competitive Business in the Territory (as defined below) to provide services to or on behalf of such insurance company in the Territory that compete with the Companies’ products or services;

(ii)be employed in any management, customer relationship or sales capacity by any entity that was a Fronting/Program Business Relationship during the Final Year to provide services to or on behalf of such Fronting/Program Business Relationship in the Territory;

(iii)solicit any entity that was a Fronting/Program Business Relationship during the Final Year to produce, underwrite and/or administer insurance policies in the Territory on behalf of an insurance company that competes against any of the Companies or any Protected Holdings Group Company in the Territory;

(iv)solicit any Customer to buy any insurance products or services offered in the Territory by the Companies during the Final Year;

(v)solicit any Prospective Customer to buy any insurance products or services offered in the Territory by the Companies during the Final Year;

(vi)solicit any Agent doing business in the Territory (A) to assist any individual or entity who was a customer of the Companies during the Final Year to obtain any insurance products or services that compete with any insurance products and services offered by the Companies in the Territory, or (B) to make referrals on behalf of such customers with respect to such insurance products or services that compete with any insurance products and services offered by the Companies in the Territory;

(vii)induce or persuade any Agent, Customer or Fronting/Program Business Relationship not to do business with, or to switch business from, or reduce business with, the Companies or any Protected Holdings Group Company; or

(viii)solicit, or assist others in soliciting, Key Employees (as defined below) to either leave the Companies or to engage in a Competitive Business.

(c)For purposes of this Agreement, the following capitalized terms shall have the meanings set forth below:

(i)“Agent” shall mean any insurance agent, insurance broker, wholesale agent, general agent, or other person (A) who acted on behalf of any customer of the Companies to obtain insurance from the Companies, or who referred any insurance business to the Companies, during the Final Year, and (B) with respect to which either Executive had (I) Confidential Information or Privileged Information or (II) account responsibility either directly or through managing employees with such account responsibility.

(ii) “Competitive Business” shall mean the insurance business of acquiring, holding, and/or underwriting (A) individual risk workers’ compensation insurance, or (B) other specialty admitted fronting/program insurance business.

(iii) “Customer” shall mean any of the customers of the Companies who purchased insurance products that were in effect in the Final Year from, or were provided services by, the Companies, and both (A) were among the Companies’ 100 largest clients (in terms of aggregate premium payments to the Companies) during the Final Year, and (B) with respect to which Executive had relationship responsibilities or direct contact, or access to Confidential Information or Privileged Information relating to the customer.

(iv)“Final Year” means the twelve month period immediately preceding Executive’s last day of employment with the Parent Company and the Companies.

(v)“Fronting/Program Business Relationship” means a general managing agent or program administrator that has a contractual relationship with any of the Companies or any Protected Holdings Group Company to produce, underwrite and/or administer insurance policies on behalf of such company.

(vi)“Key Employees” shall mean any executive, managerial, sales, marketing, or supervisory level employees of the Companies under Executive’s direct or indirect management authority during the Final Year.

(vii)“Prospective Customer” shall mean any potential customer of the Companies who was actually engaged in discussions with any of the Companies during the Final Year (either directly or through an Agent) to purchase insurance products or services from the Companies, and both (A) would have been among the Companies’ 100 largest clients on an annualized basis (in terms of aggregate premium payments to the Companies) had the insurance been purchased, and (B) Executive was actively involved in such discussions, provided, however, a Prospective Customer does not include any such potential customer that decided to discontinue discussions with the Companies, and notified the Companies of that decision, before Executive’s last day of employment.

(viii)“Protected Holdings Group Company” shall mean any Holdings Group insurance company (other than the Companies) that: (A) was a party to a contractual relationship with a Fronting/Program Business Relationship in effect in the Final Year; and (B) Executive was involved in obtaining such contractual relationship with such Holdings Group company.

(ix)“Restricted Period” shall mean eighteen (18) months, except that in the event of “Company Non-Renewal Termination” (as defined herein), “Restricted Period shall mean twelve (12) months.

(x)“Territory” shall mean, (A) with respect to clauses (b)(i), (iv), (v) and (vi) above, each and every state or other United States jurisdiction (“State(s)”) where any of the Companies is authorized to underwrite, and was actually engaged in underwriting during the Final Year, individual risk workers’ compensation insurance or other specialty admitted fronting/program insurance business; and (B) with respect to clauses (b)(ii) and (iii) above, each and every State where any of the Companies or a Protected Holdings Group Company is authorized to underwrite insurance, and was actually engaged in underwriting insurance through a Fronting/Program Business Relationship during the Final Year.

(d)The restrictions contained in this Section 5 shall not prevent: (i) the ownership by Executive of not more than three percent (3%) of the securities of any class of any corporation, whether or not such corporation is engaged in any Competitive Business, which are publicly traded on any securities exchange or any “over the counter” market; or (ii) after Executive’s employment by the Parent Company and the Companies ends, Executive’s being employed by a subsidiary or division of an insurance company that engages in Competitive Business as long as both (A) such subsidiary or division does not engage in Competitive Business in the Territory, and (B) Executive does not provide services to or assist the subsidiaries or divisions of such company that engage in Competitive Business in the Territory.

6.TERMINATION. Executive’s employment hereunder shall terminate under the following circumstances:

(a)Termination for Cause. The Parent Company may terminate the employment of Executive for Cause at any time by providing written notice to Executive specifying the cause of the termination. For the purposes of this Agreement, “Cause” means that: (i) Executive willfully violated Sections 4 or 5 of this Agreement; (ii) Executive grossly neglected his duties hereunder; (iii) Executive was convicted of a felony or a crime involving moral turpitude (meaning a crime that includes the commission of an act of depravity, dishonesty, or bad morals); (iv) Executive has committed an act of dishonesty, fraud, or embezzlement against any entity in the Holdings Group; (v) Executive willfully and/or knowingly breached this Agreement in any material respect or willfully violated the Parent Company’s or the Companies’ written policies which have been provided to him; or (vi) Executive willfully failed or refused to follow the lawful instructions of the CEO or any of the Companies Boards that are consistent with this Agreement (“Insubordination”). In the event that the Parent Company provides written notice of termination for Cause pursuant to Section 6(a)(ii) or (vi), Executive shall be entitled to cure any alleged neglect of his duties or Insubordination, to the extent curable, within thirty (30) days of receiving written notice from the Company specifying the factual basis for its belief that Executive grossly neglected his duties hereunder or engaged in Insubordination. If

Executive is terminated for Cause, Executive’s compensation shall terminate on the date of such termination, and all equity awards, whether vested or unvested at that time, shall be immediately forfeited and canceled effective as of the date of such termination.

(b)Company Termination Without Cause. The Parent Company may terminate Executive at any time without Cause, with or without prior notice. If (i) the Parent Company delivers a timely Non-Renewal Notice and Executive has not timely delivered a timely Non-Renewal Notice, (ii) Executive continues in employment with the Parent Company through the last day of the Term and (iii) the parties have not executed a written agreement applicable to Executive’s employment after the expiration of the Term, the Executive’s employment shall terminate on the last day of the Term (a “Company Non-Renewal Termination”).

(c)Termination by Executive for Good Reason. Executive may, at his option, terminate this Agreement for Good Reason in accordance with the terms of this Section 6(c). “Good Reason” shall mean the occurrence of any one or more of the following events without the prior consent of Executive:

(i)A material diminution in Executive’s authority, duties or responsibilities, or requiring Executive to report directly to a person or persons other than (x) the Parent Company’s CEO or the Board, or (y) the Companies’ Boards;

(ii)A diminution in Executive’s Base Salary; or

(iii)Any action or inaction by the Parent Company or the Companies which constitutes a material breach of the terms of this Agreement;

and, in each case, the failure by the Parent Company or the Companies, as applicable, to cure such condition within the thirty (30) day period after receipt of written notice from Executive specifying in detail the factual basis for his belief that he has Good Reason to resign (“Good Reason Notice”). Executive must deliver a Good Reason Notice to the Parent Company and the Companies within thirty (30) calendar days after the initial existence of a Good Reason condition, and, if the Parent Company or the Companies, as applicable, fails to timely cure such Good Reason condition, Executive must terminate his employment within one year after the initial existence of such Good Reason condition, and any failure by Executive to timely comply with either of these requirements shall constitute a waiver of Executive’s right to resign for Good Reason for such condition.

(d)Termination due to Death or Disability. Executive’s employment hereunder shall terminate upon his death. The Parent Company may terminate Executive’s employment if he is prevented from performing his responsibilities under this Agreement because of “Disability.” A “Disability” means that Executive is unable to engage in any substantial gainful activity by reason of a medically determinable physical or mental impairment that can be expected to result in death or can be expected to last for a continuous period of not less than 12 months, or is, by reason of any medically determinable physical or mental impairment that can be expected to result in death or can be expected to last for a continuous period of not less than 12 months, receiving income replacement benefits for a period of not less than three months under an accident or disability insurance benefit plan covering Executive (“Disability Plan”). If Executive is unable to perform his responsibilities, by reason of any accident, illness, or mental, or physical impairment, for a period that is reasonably anticipated by the Parent Company to be longer than the waiting period in the Disability Plan, then, at the Parent Company’s request, Executive shall promptly apply for such income replacement benefits.

(e)Expiration of Term. If (i) Executive delivers a timely Non-Renewal Notice pursuant to Section 1 (whether or not the Parent Company has timely delivered a timely Non-Renewal Notice), (ii) Executive continues in employment with the Parent Company through the last day of the Term, and (iii) the parties have not executed a written agreement applicable to Executive’s employment after the expiration of the Term, the Executive’s employment shall terminate on the last day of the Term (“Executive Non-Renewal Termination).

7.COMPENSATION AND BENEFITS UPON TERMINATION.

(a)If, during the Term, the Parent Company terminates Executive’s employment without Cause, there is a Company Non-Renewal Termination, or Executive terminates his employment for Good Reason, then:

(i)as soon as practicable following such termination but no later than ten (10) days after the Termination Date (as defined below), FLIMCO shall pay to Executive his accrued but yet unpaid base salary earned through the Termination Date and any accrued, but unused vacation pay through the Termination Date (the “Accrued Obligations”);

(ii)within forty-five (45) days following the Termination Date, FLIMCO shall reimburse Executive for reasonable expenses incurred, but not paid prior to the Termination Date;

(iii)subject to the execution and delivery of a general release (which release shall not alter or result in the waiver of Executive’s right to exercise the portion of any stock option or other equity award that vested through the Termination Date, or any rights under this Section 7(a)) in a form acceptable to the Parent Company within forty five (45) days after the Termination Date (the “Release Expiration Date”), which release has not been revoked, Executive is entitled to receive:

(A)In the event of a termination without Cause or for Good Reason (I) before or 12 months or more after a Change in Control (as defined in Section 7(d)), an amount equal to Executive’s base salary for a period of eighteen (18) months after the Termination Date, or (II) within twelve (12) months after a Change in Control, an amount equal to Executive’s base salary for a period of thirty (30) months after the Termination Date, or (B) in the event of a Company Non-Renewal Termination, an amount equal to Executive’s base salary for a period of twelve (12) months after the Termination Date, which, in any case shall be paid in periodic installments in accordance with FLIMCO’s normal payroll practices in effect as of the Termination Date commencing on the first payroll cycle which is at least ten (10) business days after the 45^th day after the Termination Date;

(B)the continuation of coverage under all employee benefit insurance plans in which Executive was a participant as of the Termination Date, to the extent such post-employment coverage is authorized by such plans, at FLIMCO’s expense for the period of eighteen (18) after the Termination Date (for a termination without Cause or for Good Reason) or the period of twelve (12) months after the Termination Date (for a Company Non-Renewal Termination), provided, however if post-employment coverage is not authorized under such health insurance plan, then FLIMCO will pay Executive the premium cost for health insurance coverage that FLIMCO would have paid if Executive had continued being a participant in such health insurance plan during the applicable 12 month or 18 month period; and

(C)any unpaid discretionary bonus awarded to Executive for the year prior to the year in which the Termination Date occurs, which shall be paid in a lump sum on the normal bonus payment date for Parent Company bonuses for such preceding fiscal year.

(iv)In the event that Executive fails to execute the Release on or prior to the Release Expiration Date, Executive shall not be entitled to any payments or benefits pursuant to Section 7(a)(iii). Notwithstanding the foregoing, if the Release could become effective during the calendar year following the calendar year of the Termination Date, then no such payments that constitute “deferred compensation” under Internal Revenue Code Section 409A shall be made earlier than the first day of the calendar year following the calendar year of the Termination Date.

(b)If Executive’s employment is terminated as a result of death or by the Parent Company for Cause or because of Disability, or if a termination of employment occurs pursuant to Section 6(e) as a result of Executive’s delivering a timely Non-Renewal Notice:

(i)within ten (10) days following the Termination Date, FLIMCO shall pay to Executive the Accrued Obligations; and

(ii)within forty-five (45) days following the Termination Date, FLIMCO shall reimburse Executive for reasonable expenses incurred, but not paid prior to the Termination Date.

(c)Except for payments provided under Sections 7(a)(i), 7(a)(ii), and 7(b), all compensation and benefits paid pursuant to this Section 7 shall cease and Executive shall promptly return any amount paid under Section 7(a)(iii) to FLIMCO if Executive violates any of the terms of Sections 4 or 5 above during the Restricted Period. In addition to these remedies, the Parent Company, the Companies and the Holdings Group shall have all other remedies provided by this Agreement and by law for the breach of Sections 4 or 5 above.

(d)For purposes of this Agreement, “Termination Date” means the date of Executive’s “separation from service” within the meaning of Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”), and the regulations promulgated thereunder (“Section 409A”). For purposes of this Agreement, “Change in Control” means (and, for purposes of this definition only, capitalized terms have the meaning defined in the James River Group Holdings, Ltd. 2014 Long-Term Incentive Plan, as amended) the first to occur of the following events:

i. the purchase or other acquisition (other than from the Company), in a single transaction or series of related transactions, by any person, entity or group of persons, within the meaning of Section 13(d) or 14(d) of the Exchange Act (excluding, for this purpose, the Company or its subsidiaries or any employee benefit plan of the Company or its subsidiaries), of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Act) of 50% or more of either the then-outstanding Shares or the combined voting power of the Company’s then-outstanding voting securities entitled to vote generally in the election of directors;

ii. consummation of a reorganization, merger, amalgamation or consolidation involving the Company, in each case with respect to which persons who were the shareholders of the Company immediately prior to such reorganization, merger, amalgamation or consolidation do not, immediately thereafter, own more than 50% of, respectively, the Shares and the combined voting power entitled to vote generally in the election of directors of the reorganized, merged, amalgamated or consolidated corporation’s then-outstanding voting securities; or

iii. a liquidation or dissolution of the Company, or the sale of all or substantially all of the assets of the Company; provided, however, an event described above shall be considered a Change in Control hereunder only if it also constitutes a “change in control event” under Section 409A of the Code, to the extent necessary to avoid the adverse tax consequences thereunder with respect to any payment subject to Section 409A of the Code.

(e)Executive’s rights with respect to the vesting and exercise after the Termination Date, of any stock option or vesting of any other equity award shall be governed by any applicable award agreement and the James River Group Holdings, Ltd. Long-Term Incentive Plan, as amended.

8.409A COMPLIANCE. This Agreement shall be interpreted and administered in a manner so that any amount or benefit payable hereunder shall be paid or provided in a manner that is either exempt from or compliant with the requirements Section 409A and applicable Internal Revenue Service guidance and Treasury Regulations issued thereunder (and any applicable transition relief under Section 409A). Notwithstanding anything else contained in this Agreement to the contrary, if Executive is a “specified employee” under Holdings’ specified employee policy as in effect on the Termination Date, or if no such policy is then in effect, within the meaning of Section 409A, any payment required to be made to Executive hereunder upon or following the Termination Date shall be delayed until after the six-month anniversary of Executive’s “separation from service” (as such term is defined in Section 409A) to the extent necessary to comply with, and avoid imposition on Executive of any additional tax, interest, or penalty imposed under, Section 409A. Should payments be delayed in accordance with the preceding sentence, the accumulated payment that would have been made but for the period of the delay shall be paid in a single lump sum during the ten (10) day period following the six-month anniversary of the Termination Date. Each payroll period payment described in Section 7(a)(iii)(A) shall be treated as a separate payment for purposes of Section 409A.

9.UNIQUENESS OF SERVICES; ACKNOWLEDGEMENTS. Executive acknowledges that the services to be rendered under the provisions of this Agreement are of a special, unique, and extraordinary character; involve access to and development of Confidential Information and Privileged Information; involve developing and protecting customer relationships and goodwill; and that it would be difficult or impossible to replace such services and that, by reason thereof, Executive agrees and consents that if he violates any of the provisions of Sections 4 and 5 of this Agreement, the Parent Company, the Companies and/or any entity in the Holdings Group, in addition to any other rights and remedies available under this Agreement or otherwise, shall be entitled to an injunction to be issued by a court of competent jurisdiction restricting Executive from committing or continuing any violation of Sections 4 and 5 of this Agreement.

10.FURTHER ACKNOWLEDGEMENTS. Executive further acknowledges and agrees that the restrictions contained in Sections 4 and 5 above are reasonable and necessary to protect the legitimate interest of the Holdings Group, in view of, among other things, the short duration of the restrictions; the narrow scope of the restrictions; the Holdings Group’s interests in protecting its trade secrets, Confidential Information, and Privileged Information (which Executive agrees would be useful to competitors for more than eighteen (18) months) and its customer relationships and goodwill; Executive’s background and capabilities which will allow him to seek and accept employment without violation of the restrictions; and Executive’s entitlements under this Agreement. If any provision contained in Sections 4 or 5 above is adjudged unreasonable by a court of competent jurisdiction or arbitrator in any proceeding, then such provision shall be deemed modified as provided in Sections 4 or 5 above or by reducing the scope of such provision, the period of time during which such provision is applicable and/or the geographic area to which such provision applies, to the extent necessary for such provision to be adjudged reasonable and enforceable.

11.NOTICES. Any notices provided for or permitted by this Agreement shall be in writing and shall be deemed to have been duly given when delivered in person or three (3) days after it is mailed if delivered by registered or certified mail, return receipt requested, postage prepaid, addressed to the party for whom intended at such party’s address set forth above (for the Parent Company) or to the address listed in the Parent Company’s records (for Executive), or to such other address as such party may designate by notice in writing given in the manner provided herein.

12.SECTION HEADINGS. The section heading in this Agreement are for convenience of reference only, and they form no part of this Agreement and shall not affect its interpretation.

13.ENTIRE AGREEMENT; AMENDMENTS; COUNTERPARTS. This Agreement constitutes the entire agreement and understanding among Executive, the Parent Company and the Companies with respect to the subject matter

hereof and shall supersede any and all other prior agreements and understandings, whether oral or written, relating thereto or the employment of Executive by the Parent Company and the Companies. This Agreement may not be rescinded, modified, or amended, unless an amendment is agreed to in a writing signed by Executive and by an officer of the Parent Company specifically authorized by the Board (other than Executive), and any waiver shall be set forth in writing and signed by the party to be charged. This Agreement may be executed in any number of counterparts, including by facsimile, each of which shall be an original, but all of which together shall constitute one and the same instrument.

14.PARTIAL INVALIDITY. The invalidity or unenforceability, by statute, court decision, or otherwise, of any term or condition of this Agreement shall not affect the validity or enforceability of any other term or condition hereof.

15.GOVERNING LAW. This Agreement shall be construed and administered in accordance with the laws of North Carolina, without regard to the principles of conflicts of law which might otherwise apply.

16.ASSIGNABILITY. This Agreement may not be assigned by Executive, and any purported assignment by Executive shall be null and void. All of the terms and conditions of this Agreement shall be binding upon and inure to the benefit of the Parent Company and its successors (including without limitation any successor to the Parent Company’s business as the result of a merger or consolidation of the Parent Company, whether or not the Parent Company survives such merger or consolidation) and assigns. Successors to the Company shall include, without limitation, any corporation or corporations acquiring, directly or indirectly, all or substantially all of the assets of the Parent Company whether by merger, consolidation, purchase, or otherwise and such successor shall thereafter be deemed the “Parent Company” for purposes hereof. .

17.DISPUTE RESOLUTION.

(a)Arbitration. In the event of disputes between the parties with respect to the terms and conditions of this Agreement, such disputes shall be resolved by and through an arbitration proceeding to be conducted under the auspices of the American Arbitration Association (or any like organization successor thereto) in Raleigh, North Carolina; provided, however, that either party may seek temporary or preliminary injunctive relief with respect to appropriate matters (including, without limitation, enforcement of Sections 4 and 5 above) from a court in aid of arbitration. Such arbitration proceeding shall be conducted pursuant to the commercial arbitration rules (formal or informal) of the American Arbitration Association in as expedited a manner as is then permitted by such rules (the “Arbitration”). Both the foregoing agreement of the parties to arbitrate any and all such claims, and the results, determination, finding, judgment, and/or award rendered through such Arbitration, shall be final and binding on the parties to this Agreement and may be specifically enforced by legal proceedings.

(b)Procedure. Such Arbitration may be initiated by written notice from either the Parent Company or Executive to the other which shall be a compulsory and binding proceeding on each party. The Arbitration shall be conducted by an arbitrator selected in accordance with the procedures of the American Arbitration Association. Time is of the essence of this arbitration procedure, and the arbitrator shall be instructed and required to render his or her decision within thirty (30) days following completion of the Arbitration.

(c)Venue and Jurisdiction. Any action to compel arbitration hereunder or otherwise relating to this Agreement shall be brought exclusively in either a state court or federal court located in Raleigh, North Carolina, providedthat, with respect to an action brought in North Carolina, if a federal court has jurisdiction over the subject matter thereof, then such action shall be brought in federal court, and the Parent Company, the Companies and Executive hereby irrevocably submit with regard to any such action or proceeding for itself and in respect to its property, generally and unconditionally, to the jurisdiction of the aforesaid courts.

(d)Waiver of Jury Trial. IN THE EVENT OF ANY LITIGATION WITH RESPECT TO ANY MATTER CONNECTED WITH THIS AGREEMENT OR THE AGREEMENTS OR TRANSACTIONS CONTEMPLATED HEREUNDER ALL OF THE PARTIES HERETO WAIVE ALL RIGHTS TO A TRIAL BY JURY.

Kindly indicate your acceptance of this Agreement by signing and returning a copy of this letter to me.

Very truly yours,

James River Group, Inc.

By: /s/ Robert P. Myron________________

Name: Robert P. Myron        

Title:     Chief Executive Officer

ACCEPTED AND AGREED TO THIS 13 DAY OF APRIL, 2018

Stonewood Insurance Company

By: /s/ Sarah Doran____________________

Name: Sarah Doran    

Title:     Chairman

Falls Lake Insurance Management Company, Inc.

By: /s/ Sarah Doran_____________________

Name: Sarah Doran    

Title:    Chairman

Falls Lake National Insurance Company

By: /s/ Sarah Doran_____________________

Name: Sarah Doran    

Title:     Chairman

Falls Lake General Insurance Company

By: /s/ Sarah Doran______________________

Name: Sarah Doran    

Title:    Chairman

Falls Lake Fire and Casualty Company

By: /s/ Sarah Doran_______________________

Name: Sarah Doran    

Title:    Chairman

/s/ Steven J. Hartman 4/9/2018____________

Steven Hartman

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Robert P. Myron, certify that:

1. I have reviewed this quarterly report on Form 10-Q of James River Group Holdings, Ltd.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 4, 2018

/s/ Robert P. Myron

Robert P. Myron

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Sarah C. Doran, certify that:

1. I have reviewed this quarterly report on Form 10-Q of James River Group Holdings, Ltd.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 4, 2018

/s/ Sarah C. Doran

Sarah C. Doran

Chief Financial Officer

(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of James River Group Holdings, Ltd. (the “Company”) on Form 10-Q for the period ended March 31, 2018 as filed with the Securities and Exchange Commission on the date hereof  (the “Report”), we, Robert P. Myron, President and Chief Executive Officer of the Company, and Sarah C. Doran, Chief Financial Officer of the Company, certify, to the best of our knowledge, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Robert P. Myron

Robert P. Myron

President and Chief Executive Officer

(Principal Executive Officer)

May 4, 2018

/s/ Sarah C. Doran

Sarah C. Doran

Chief Financial Officer

(Principal Financial Officer)

May 4, 2018

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 01, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	James River Group Holdings, Ltd.
Entity Central Index Key	0001620459
Trading Symbol	jrvr
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		29,866,705
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2018

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fixed maturity securities:
Available-for-sale, at fair value (amortized cost: 2018 – $1,054,902; 2017 – $1,008,662)	$ 1,043,251	$ 1,016,098
Trading, at fair value (amortized cost: 2018 – $3,800; 2017 – $3,801)	3,805	3,808
Equity securities available-for-sale, at fair value (cost: 2018 – $80,464; 2017 – $75,318)	85,957	82,522
Bank loan participations held-for-investment, at amortized cost, net of allowance	257,426	238,214
Short-term investments	26,235	36,804
Other invested assets	74,974	70,208
Total invested assets	1,491,648	1,447,654
Cash and cash equivalents	151,046	163,495
Accrued investment income	8,713	8,381
Premiums receivable and agents’ balances, net	391,456	352,436
Reinsurance recoverable on unpaid losses	331,245	302,524
Reinsurance recoverable on paid losses	16,501	11,292
Prepaid reinsurance premiums	96,141	91,979
Deferred policy acquisition costs	70,769	72,365
Intangible assets, net	38,185	38,334
Goodwill	181,831	181,831
Other assets	84,475	86,404
Total assets	2,862,010	2,756,695
Liabilities:
Reserve for losses and loss adjustment expenses	1,369,548	1,292,349
Unearned premiums	432,248	418,114
Payables to reinsurers	59,138	56,268
Senior debt	98,300	98,300
Junior subordinated debt	104,055	104,055
Accrued expenses	35,138	39,295
Other liabilities	77,813	53,615
Total liabilities	2,176,240	2,061,996
Commitments and contingent liabilities
Shareholders’ equity:
Common Shares – 2018 and 2017: $0.0002 par value; 200,000,000 shares authorized; 29,866,705 and 29,696,682 shares issued and outstanding, respectively	6	6
Preferred Shares – 2018 and 2017: $0.00125 par value; 20,000,000 shares authorized; no shares issued and outstanding	0	0
Additional paid-in capital	639,183	636,149
Retained earnings	58,753	48,198
Accumulated other comprehensive (loss) income	(12,172)	10,346
Total shareholders’ equity	685,770	694,699
Total liabilities and shareholders’ equity	$ 2,862,010	$ 2,756,695

XML

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Available-for-sale debt securities, amortized cost	$ 1,054,902	$ 1,008,662
Trading securities, debt, amortized cost	3,800	3,801
Available-for-sale equity securities, amortized cost	$ 80,464	$ 75,318
Common stock, par value (in dollars per share)	$ 0.0002	$ 0.0002
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	29,866,705	29,696,682
Common stock, shares outstanding	29,866,705	29,696,682
Preferred stock par value (in dollars per share)	$ 0.00125	$ 0.00125
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

XML

Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Gross written premiums	$ 298,116	$ 224,179
Ceded written premiums	(87,138)	(66,269)
Net written premiums	210,978	157,910
Change in net unearned premiums	(10,036)	(3,223)
Net earned premiums	200,942	154,687
Net investment income	13,256	16,733
Net realized and unrealized (losses) gains on investments	(810)	1,047
Other income	4,956	3,935
Total revenues	218,344	176,402
Expenses
Losses and loss adjustment expenses	143,772	105,369
Other operating expenses	54,783	48,893
Other expenses	4	(114)
Interest expense	2,522	2,123
Amortization of intangible assets	149	149
Total expenses	201,230	156,420
Income before taxes	17,114	19,982
Income tax expense	1,481	1,532
Net income	15,633	18,450
Other comprehensive (loss) income:
Net unrealized (losses) gains, net of taxes of $(544) in 2018 and $1,514 in 2017	(18,547)	4,034
Total comprehensive (loss) income	$ (2,914)	$ 22,484
Per share data:
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.63
Diluted earnings per share (in dollars per share)	0.52	0.61
Dividend declared per share (in dollars per share)	$ 0.30	$ 0.30
Weighted-average common shares outstanding:
Basic (in shares)	29,764,320	29,289,588
Diluted (in shares)	30,193,303	30,327,423

XML

Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Tax on net unrealized gains (losses)	$ (544)	$ 1,514

XML

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Balance (in shares) at Dec. 31, 2016		29,257,566
Balance at Dec. 31, 2016	$ 693,221	$ 6	$ 636,856	$ 55,232	$ 1,127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,450			18,450
Other comprehensive income	4,034				4,034
Dividends	(8,810)			(8,810)
Exercised (in shares)		63,467
Exercise of stock options	198		198
Vesting of RSUs (in shares)		23,294
Vesting of RSUs	(627)		(627)
Compensation expense under share incentive plans	1,794		1,794
Balance (in shares) at Mar. 31, 2017		29,344,327
Balance at Mar. 31, 2017	$ 708,260	$ 6	638,221	64,872	5,161
Balance (in shares) at Dec. 31, 2017	29,696,682	29,696,682
Balance at Dec. 31, 2017	$ 694,699	$ 6	636,149	48,198	10,346
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,633			15,633
Net income | ASU 2016-01				(1,400)
Other comprehensive income	(18,547)				(18,547)
Dividends	(9,049)			(9,049)
Exercised (in shares)		127,196
Exercise of stock options	2,355		2,355
Vesting of RSUs (in shares)		42,827
Vesting of RSUs	(776)		(776)
Compensation expense under share incentive plans	$ 1,455		1,455
Balance (in shares) at Mar. 31, 2018	29,866,705	29,866,705
Balance at Mar. 31, 2018	$ 685,770	$ 6	$ 639,183	58,753	(12,172)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption of ASU | ASU 2016-01	0			4,682	(4,682)
Cumulative effect of adoption of ASU | ASU 2018-02	$ 0			$ (711)	$ 711

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net cash provided by operating activities	$ 48,461	$ 16,112
Securities available-for-sale:
Purchases – fixed maturity securities	(118,652)	(46,276)
Sales – fixed maturity securities	26,392	32,148
Maturities and calls – fixed maturity securities	45,245	15,406
Purchases – equity securities	(5,949)	0
Sales – equity securities	766	409
Bank loan participations:
Purchases	(66,059)	(75,983)
Sales	35,708	37,462
Maturities	11,427	18,840
Other invested assets:
Purchases	(4,992)	(250)
Short-term investments, net	10,569	(2,517)
Securities receivable or payable, net	12,576	(336)
Purchases of property and equipment	(275)	(970)
Net cash used in investing activities	(53,244)	(22,067)
Financing activities
Dividends paid	(9,074)	(8,885)
Issuance of common shares under equity incentive plans	2,862	303
Common share repurchases	(1,283)	(732)
Repayments of financing obligations net of proceeds	(171)	(291)
Net cash used in financing activities	(7,666)	(9,605)
Change in cash and cash equivalents	(12,449)	(15,560)
Cash and cash equivalents at beginning of period	163,495	109,784
Cash and cash equivalents at end of period	151,046	94,224
Supplemental information
Interest paid	$ 2,509	$ 2,101

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Accounting Policies

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Accounting Policies

Accounting Policies

Organization

James River Group Holdings, Ltd. (referred to as “JRG Holdings” or, with its subsidiaries, the “Company”) is an exempted holding company registered in Bermuda, organized for the purpose of acquiring and managing insurance and reinsurance entities.

The Company owns six insurance companies based in the United States (“U.S.”) focused on specialty insurance niches and two Bermuda-based reinsurance companies as described below:

• James River Group Holdings UK Limited (“James River UK”) is an insurance holding company formed in 2015 in the United Kingdom (“U.K.”). JRG Holdings contributed James River Group, Inc. (“James River Group”), a U.S. insurance holding company, to James River UK in 2015.

• James River Group is a Delaware domiciled insurance holding company formed in 2002 which owns all of the Company’s U.S.-based subsidiaries, either directly or indirectly through one of its wholly-owned U.S. subsidiaries. James River Group oversees the Company’s U.S. insurance operations and maintains all of the outstanding debt in the U.S.

• James River Insurance Company is an Ohio domiciled excess and surplus lines insurance company that, with its wholly-owned insurance subsidiary, James River Casualty Company, is authorized to write business in every state and the District of Columbia.

• Falls Lake National Insurance Company (“Falls Lake National”) is an Ohio domiciled insurance company which wholly owns Stonewood Insurance Company (“Stonewood Insurance”), a North Carolina domiciled company, Falls Lake General Insurance Company, an Ohio domiciled company, and Falls Lake Fire and Casualty Company, a California domiciled company. Falls Lake National began writing specialty admitted fronting and program business in late 2013. Falls Lake Fire and Casualty began operations in 2016.

• JRG Reinsurance Company Ltd. (“JRG Re”) was formed in 2007 and commenced operations in 2008. JRG Re, a Bermuda domiciled reinsurer, primarily provides non-catastrophe casualty reinsurance to U.S. third parties.

• Carolina Re Ltd (“Carolina Re”) was formed in 2018 and provides reinsurance to the Company’s U.S.-based insurance subsidiaries. Carolina Re has entered into a stop loss reinsurance treaty with JRG Re.

Basis of Presentation

The accompanying condensed consolidated financial statements and notes have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated financial statements include the results of the Company and its subsidiaries from their respective dates of inception or acquisition, as applicable. Readers are urged to review the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for a more complete description of the Company’s business and accounting policies. 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. Interim results are not necessarily indicative of results of operations for the full year. The consolidated balance sheet as of December 31, 2017 was derived from the Company’s audited annual consolidated financial statements.

Intercompany transactions and balances have been eliminated.

Estimates and Assumptions

Preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying disclosures. Those estimates are inherently subject to change, and actual results may ultimately differ from those estimates.

Variable Interest Entities

Entities that do not have sufficient equity at risk to allow the entity to finance its activities without additional financial support or in which the equity investors, as a group, do not have the characteristic of a controlling financial interest are referred to as variable interest entities (“VIE”). A VIE is consolidated by the variable interest holder that is determined to have the controlling financial interest (primary beneficiary) as a result of having both the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company determines whether it is the primary beneficiary of an entity subject to consolidation based on a qualitative assessment of the VIE’s capital structure, contractual terms, nature of the VIE’s operations and purpose, and the Company’s relative exposure to the related risks of the VIE on the date it becomes initially involved in the VIE. The Company reassesses its VIE determination with respect to an entity on an ongoing basis.

The Company holds interests in VIEs through certain equity method investments included in “other invested assets” in the accompanying condensed consolidated balance sheets. The Company has determined that it should not consolidate any of the VIEs as it is not the primary beneficiary in any of the relationships. Although the investments resulted in the Company holding variable interests in the entities, they did not empower the Company to direct the activities that most significantly impact the economic performance of the entities. The Company’s investments related to these VIEs totaled $32.6 million and $32.1 million as of March 31, 2018 and December 31, 2017, respectively, representing the Company’s maximum exposure to loss.

Income Tax Expense

Our effective tax rate fluctuates from period to period based on the relative mix of income reported by country and the respective tax rates imposed by each tax jurisdiction. For the three months ended March 31, 2018 and 2017, our U.S. federal income tax expense was 8.7% and 7.7% of income before taxes, respectively. For U.S.-sourced income, the Company’s U.S. federal income tax expense differs from the amounts computed by applying the federal statutory income tax rate (21% in 2018 and 35% in 2017) to income before taxes due primarily to interest income on tax-advantaged state and municipal securities (state and municipal securities represent 12.4% and 10.9% of our available-for-sale securities at March 31, 2018 and 2017, respectively), dividends received income, and excess tax benefits on share based compensation.

Financial results reflect provisional amounts related to the December 2017 enactment of the Tax Cuts and Jobs Act of 2017 (“TCJA”). These provisional estimates are based on the Company’s initial analysis and current interpretation of the legislation. Given the complexity of the legislation, anticipated guidance from the U.S. Treasury, and the potential for additional guidance from the SEC or the Financial Accounting Standards Board (“FASB”), these estimates may be adjusted during 2018.

Adopted Accounting Standards

Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance applies to all companies that either enter into contracts with customers to transfer goods or services or enter into contracts for the transfer of nonfinancial assets, unless those contracts are within the scope of other standards, such as insurance contracts. Under this guidance, a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Judgments required in adopting this update may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The adoption of ASU 2014-09 had no impact on reported fee income and there was no cumulative effect of initially applying the update.

Effective January 1, 2018, the Company adopted ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. Among other things, this ASU requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. Upon adoption on January 1, 2018, the Company made a $4.7 million cumulative-effect adjustment to increase retained earnings and reduce accumulated other comprehensive income. The adoption of ASU 2016-01 did not materially impact the Company's financial position, cash flows, or total comprehensive income. The Company's results of operations were impacted as changes in fair value of equity instruments are now presented in net income rather than other comprehensive (loss) income. For the three months ended March 31, 2018, the impact was a $1.4 million reduction in net income and a $0.05 reduction in basic and diluted earnings per share.

Effective January 1, 2018, the Company adopted ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This update was issued as a result of the enactment of the TCJA on December 22, 2017. The ASU allows for the option to reclassify the stranded tax effects resulting from the implementation of the TCJA out of accumulated other comprehensive income and into retained earnings. As the adoption of ASU 2016-01 in 2018 resulted in the reclassification of the entire unrealized balance on equity securities from accumulated other comprehensive income into retained earnings, only the stranded tax effects on the unrealized balances of fixed income securities were impacted by the adoption of ASU 2018-02. The reclassification resulted in a $711,000 decrease to the Company's retained earnings with a corresponding increase to accumulated other comprehensive income in the first quarter of 2018.

Prospective Accounting Standards

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend beyond 12 months. This ASU is effective for annual and interim reporting periods beginning after December 15, 2018. Upon adoption, leases will be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. The Company is currently evaluating ASU 2016-02 to determine the potential impact that adopting this standard will have on its financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of 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 financial assets measured at amortized cost, such as bank loan participations held for investment, 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, with the amount of the allowance limited to the amount by which fair value is below amortized cost. This ASU is effective for annual and interim reporting periods beginning after December 15, 2019. Upon adoption, this ASU 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 has not yet completed the analysis of how adopting this ASU will affect the Company’s financial statements.

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Investments

3 Months Ended

Mar. 31, 2018

Investments [Abstract]

Investments

Investments

The Company’s available-for-sale investments are summarized as follows:

	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
March 31, 2018
Fixed maturity securities:
State and municipal	$	137,478	$	4,029	$	(1,782	)	$	139,725
Residential mortgage-backed	186,279		509		(5,690		)	181,098
Corporate	445,058		3,054		(8,486		)	439,626
Commercial mortgage and asset-backed	192,941		173		(2,310		)	190,804
Obligations of U.S. government corporations and agencies	7,804		—		(29		)	7,775
U.S. Treasury securities and obligations guaranteed by the U.S. government	83,317		73		(1,171		)	82,219
Redeemable preferred stock	2,025		—		(21		)	2,004
Total fixed maturity securities	1,054,902		7,838		(19,489		)	1,043,251
Equity securities	80,464		6,845		(1,352		)	85,957
Total investments available-for-sale	$	1,135,366	$	14,683	$	(20,841	)	$	1,129,208
December 31, 2017
Fixed maturity securities:
State and municipal	$	139,382	$	5,587	$	(603	)	$	144,366
Residential mortgage-backed	160,379		723		(2,441		)	158,661
Corporate	408,857		7,503		(2,639		)	413,721
Commercial mortgage and asset-backed	182,595		714		(698		)	182,611
Obligations of U.S. government corporations and agencies	35,948		—		(101		)	35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government	79,476		37		(639		)	78,874
Redeemable preferred stock	2,025		—		(7		)	2,018
Total fixed maturity securities	1,008,662		14,564		(7,128		)	1,016,098
Equity securities	75,318		7,830		(626		)	82,522
Total investments available-for-sale	$	1,083,980	$	22,394	$	(7,754	)	$	1,098,620

The amortized cost and fair value of available-for-sale investments in fixed maturity securities at March 31, 2018 are summarized, by contractual maturity, as follows:

	Cost or Amortized Cost		Fair Value
	(in thousands)
One year or less	$	33,850	$	33,743
After one year through five years	327,069		323,368
After five years through ten years	185,400		181,026
After ten years	127,338		131,208
Residential mortgage-backed	186,279		181,098
Commercial mortgage and asset-backed	192,941		190,804
Redeemable preferred stock	2,025		2,004
Total	$	1,054,902	$	1,043,251

Actual maturities may differ for some securities because borrowers have the right to call or prepay obligations with or without penalties.

The following table shows the Company’s gross unrealized losses and fair value for available-for-sale securities aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position:

	Less Than 12 Months					12 Months or More					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
March 31, 2018
Fixed maturity securities:
State and municipal	$	61,275	$	(1,325	)	$	10,454	$	(457	)	$	71,729	$	(1,782	)
Residential mortgage-backed	90,188		(1,743		)	79,455		(3,947		)	169,643		(5,690		)
Corporate	260,523		(5,309		)	64,506		(3,177		)	325,029		(8,486		)
Commercial mortgage and asset-backed	94,429		(1,578		)	22,658		(732		)	117,087		(2,310		)
Obligations of U.S. government corporations and agencies	—		—			7,775		(29		)	7,775		(29		)
U.S. Treasury securities and obligations guaranteed by the U.S. government	53,118		(913		)	18,080		(258		)	71,198		(1,171		)
Redeemable preferred stock	2,004		(21		)	—		—			2,004		(21		)
Total fixed maturity securities	561,537		(10,889		)	202,928		(8,600		)	764,465		(19,489		)
Equity securities	17,816		(811		)	5,685		(541		)	23,501		(1,352		)
Total investments available-for-sale	$	579,353	$	(11,700	)	$	208,613	$	(9,141	)	$	787,966	$	(20,841	)
December 31, 2017
Fixed maturity securities:
State and municipal	$	40,117	$	(318	)	$	10,662	$	(285	)	$	50,779	$	(603	)
Residential mortgage-backed	50,447		(261		)	84,193		(2,180		)	134,640		(2,441		)
Corporate	113,464		(846		)	66,954		(1,793		)	180,418		(2,639		)
Commercial mortgage and asset-backed	53,965		(244		)	25,299		(454		)	79,264		(698		)
Obligations of U.S. government corporations and agencies	3,024		(1		)	32,154		(100		)	35,178		(101		)
U.S. Treasury securities and obligations guaranteed by the U.S. government	50,760		(430		)	26,707		(209		)	77,467		(639		)
Redeemable preferred stock	2,018		(7		)	—		—			2,018		(7		)
Total fixed maturity securities	313,795		(2,107		)	245,969		(5,021		)	559,764		(7,128		)
Equity securities	5,859		(65		)	5,665		(561		)	11,524		(626		)
Total investments available-for-sale	$	319,654	$	(2,172	)	$	251,634	$	(5,582	)	$	571,288	$	(7,754	)

The Company held securities of 205 issuers that were in an unrealized loss position at March 31, 2018 with a total fair value of $788.0 million and gross unrealized losses of $20.8 million. None of the fixed maturity securities with unrealized losses has ever missed, or been delinquent on, a scheduled principal or interest payment.

At March 31, 2018, 99.9% of the Company’s fixed maturity security portfolio was rated “BBB-” or better (“investment grade”) by Standard & Poor’s or received an equivalent rating from another nationally recognized rating agency. Fixed maturity securities with ratings below investment grade by Standard & Poor’s or another nationally recognized rating agency at March 31, 2018 had an aggregate fair value of $868,000 and an aggregate net unrealized loss of $26,000.

Management concluded that none of the fixed maturity securities with an unrealized loss at March 31, 2018 or December 31, 2017 experienced an other-than-temporary impairment. Management does not intend to sell available-for-sale securities in an unrealized loss position, and it is not “more likely than not” that the Company will be required to sell these securities before a recovery in their value to their amortized cost basis occurs.

At December 31, 2017, management concluded that one equity security, based on the severity and duration of the impairment, had experienced an other-than-temporary impairment. Accordingly, the Company recorded an impairment loss of $1.5 million in 2017. Management concluded that none of the other equity securities with an unrealized loss at December 31, 2017 experienced an other-than-temporary impairment.

At December 31, 2017, the Company held a participation in a loan with unpaid principal of $807,000 issued by a company that produces and supplies power to Puerto Rico through a power purchase agreement with Puerto Rico Electric Power Authority (“PREPA”), a public corporation and governmental agency of the Commonwealth of Puerto Rico. Management concluded that an allowance for credit losses should be established on the loan at December 31, 2017 to reduce its carrying value to $0. In the first quarter of 2018, the full outstanding principal on the loan was repaid and the Company recognized a realized gain of $807,000 on the repayment.

The Company’s bank loan portfolio includes loans to oil and gas companies in the energy sector. The market values of these loans were previously impacted by declining energy prices. At March 31, 2018, the Company’s oil and gas exposure in the bank loan portfolio was in three loans with a carrying value of $4.7 million and an unrealized loss of $143,000. All of the loans were current at March 31, 2018. Management concluded that two of these loans were impaired as of March 31, 2018. At March 31, 2018, the two impaired loans had a carrying value of $1.7 million, unpaid principal of $2.1 million and an allowance for credit losses of $300,000. At December 31, 2017, three loans were impaired with a carrying value of $4.6 million, unpaid principal of $6.9 million and an allowance for credit losses of $2.3 million.

Management concluded that one non-energy sector loan was impaired at December 31, 2017. At December 31, 2017, the impaired loan had a carrying value of $561,000, unpaid principal of $706,000, and an allowance for credit losses of $145,000.

The aggregate allowance for credit losses was $300,000 at March 31, 2018 on impaired loans from two issuers with a total carrying value of $1.7 million and unpaid principal of $2.1 million. At December 31, 2017, the aggregate allowance for credit losses was $3.2 million on impaired loans from five issuers with a total carrying value of $5.1 million and unpaid principal of $8.4 million. The aggregate allowance for credit losses on impaired loans was $639,000 at March 31, 2017 and $943,000 at December 31, 2016.

Bank loan participations generally have a credit rating that is below investment grade (i.e. below “BBB-” for Standard & Poor’s) at the date of purchase. These bank loans are primarily senior, secured floating-rate debt rated “BB”, “B”, or “CCC” by Standard & Poor’s or an equivalent rating from another nationally recognized rating agency. These bank loans include assignments of, and participations in, performing and non-performing senior corporate debt generally acquired through primary bank syndications and in secondary markets. Bank loans consist of, but are not limited to, term loans, the funded and unfunded portions of revolving credit loans, and other similar loans and investments. Management believed that it was probable at the time that these loans were acquired that the Company would be able to collect all contractually required payments receivable.

Generally, the accrual of interest on a bank loan participation is discontinued when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about further collectability of principal or interest. A bank loan participation may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. Generally, bank loan participations are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Interest received on nonaccrual loans generally is reported as investment income. There were no bank loans on nonaccrual status at March 31, 2018 or December 31, 2017.

The allowance for credit losses is maintained at a level believed adequate by management to absorb estimated probable credit losses. Management’s periodic evaluation of the adequacy of the allowance is based on consultations and advice of the Company’s independent investment manager, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, current economic conditions, and other relevant factors. The Company generally records an allowance equal to the difference between the fair value and the amortized cost of bank loans that it has determined to be impaired as a practical expedient for an estimate of probable future cash flows to be collected on those bank loans. Bank loans are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.

The average recorded investment in impaired bank loans was $3.4 million and $5.3 million during the three months ended March 31, 2018 and 2017, respectively. Investment income of $20,000 and $84,000, respectively, was recognized during the time within those periods that the loans were impaired. The Company recorded net realized investment gains of $3,000 and $177,000 in the three months ended March 31, 2018 and 2017, respectively, for changes in the fair value of impaired bank loans.

Changes in unrealized gains or losses on securities held for trading are recorded as trading gains or losses within net investment income. Net investment income for the three months ended March 31, 2018 includes $3,000 of net trading losses, all relating to securities still held at March 31, 2018.

The Company’s realized gains and losses are summarized as follows:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Fixed maturity securities:
Gross realized gains	$	22		$	338
Gross realized losses	(223		)	(296		)
	(201		)	42
Bank loan participations:
Gross realized gains	1,220			1,136
Gross realized losses	(100		)	(539		)
	1,120			597
Equity securities:
Gross realized gains	—			409
Gross realized losses	(15		)	—
Changes in fair values of equity securities	(1,710		)	—
	(1,725		)	409
Short-term investments and other:
Gross realized gains	—			—
Gross realized losses	(4		)	(1		)
	(4		)	(1		)
Total	$	(810	)	$	1,047

Realized investment gains or losses are determined on a specific identification basis. 

The Company invests selectively in private debt and equity opportunities. These investments, which together comprise the Company’s other invested assets, are primarily focused in renewable energy, limited partnerships, and bank holding companies.

	Carrying Value				Investment Income
	March 31,		December 31,		Three Months Ended March 31,
	2018		2017		2018		2017
	(in thousands)
Renewable energy LLCs (a)	$	32,592	$	32,063	$	1,211	$	5,594
Renewable energy notes receivable (b)	8,750		7,278		297		—
Limited partnerships (c)	29,132		26,367		226		382
Bank holding companies (d)	4,500		4,500		86		86
Total other invested assets	$	74,974	$	70,208	$	1,820	$	6,062

(a) The Company’s Corporate and Other segment owns equity interests ranging from 2.6% to 32.8% in various LLCs whose principal objective is capital appreciation and income generation from owning and operating renewable energy production facilities (wind and solar). The LLCs are managed by an affiliate of the Company’s largest shareholder and the Company’s Non-Exucitive Chairman has invested in certain of these LLCs. The equity method is used to account for the Company’s LLC investments. Income for the LLCs primarily reflects adjustments to the carrying values of investments in renewable energy projects to their determined fair values. The fair value adjustments are included in revenues for the LLCs. Expenses for the LLCs are not significant and are comprised of administrative and interest expenses. The Company received cash distributions from these investments totaling $1.2 million and $1.6 million in the three months ended March 31, 2018 and 2017, respectively.

(b) The Company has invested in notes receivable for renewable energy projects. At March 31, 2018, the Company holds an $8.8 million note issued by an affiliate of the Company’s largest shareholder. Interest on the note, which matures in 2021, is fixed at 15.0%. Interest income on the note was $297,000 for the three months ended March 31, 2018.

(c) The Company owns investments in limited partnerships that invest in concentrated portfolios including publicly-traded small cap equities, loans of middle market private equity sponsored companies, equity tranches of collateralized loan obligations (“CLOs”), and tranches of distressed home loans. Income from the partnerships is recognized under the equity method of accounting. The Company’s Corporate and Other segment held an investment in a limited partnership with a carrying value of $2.9 million at March 31, 2018. The Company recognized investment losses of $125,000 and investment income of $68,000 on the investment for the three months ended March 31, 2018 and 2017, respectively. The Company’s Excess and Surplus Lines segment holds investments in limited partnerships of $26.3 million at March 31, 2018. Investment income of $351,000 and $314,000 was recognized on the investments for the three months ended March 31, 2018 and 2017, respectively. At March 31, 2018, the Company’s Excess and Surplus Lines segment has outstanding commitments to invest another $2.6 million in these limited partnerships.

(d) The Company holds $4.5 million of subordinated notes issued by a bank holding company. Interest on the notes, which mature on August 12, 2023, is fixed at 7.6% per annum. Interest income on the notes was $86,000 in both three months ended March 31, 2018 and 2017. The Company’s Chairman was previously the Lead Independent Director of the bank holding company and an investor in the bank holding company. Additionally, one of the Company’s directors was an investor in the bank holding company and is currently a lender to the bank holding company.

At March 31, 2018, the Company held an investment in a CLO where one of the underlying loans was issued by the bank holding company. The investment, with a carrying value of $4.7 million at March 31, 2018, is classified as an available-for-sale fixed maturity.

The Company previously held common shares issued by the bank holding company. Realized investments gains of $409,000 were recognized in the three months ended March 31, 2017 related to the sale of common shares of the bank holding company.

The Company holds a $1.0 million certificate of deposit issued by the bank holding company. The certificate of deposit, which matures on December 19, 2018, is carried as a short-term investment. Interest income of $0 and $1,000 was recognized on this investment for the three months ended March 31, 2018 and 2017, respectively.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

On December 11, 2007, the Company completed an acquisition of James River Group by acquiring 100% of the outstanding shares of James River Group common stock, referred to herein as the “Merger”. The transaction was accounted for under the purchase method of accounting, and goodwill and intangible assets were recognized by the Company as a result of the transaction. Goodwill resulting from the Merger was $181.8 million at March 31, 2018 and December 31, 2017.

The gross carrying amounts and accumulated amortization for each major specifically identifiable intangible asset class were as follows: 

		March 31, 2018				December 31, 2017
	Life (Years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
		($ in thousands)
Intangible Assets
Trademarks	Indefinite	$	22,200	$	—	$	22,200	$	—
Insurance licenses and authorities	Indefinite	9,164		—		9,164		—
Identifiable intangibles not subject to amortization		31,364		—		31,364		—
Broker relationships	24.6	11,611		4,790		11,611		4,641
Identifiable intangible assets subject to amortization		11,611		4,790		11,611		4,641
		$	42,975	$	4,790	$	42,975	$	4,641

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Earnings Per Share

3 Months Ended

Mar. 31, 2018

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 condensed consolidated financial statements:

	Three Months Ended March 31,
	2018			2017
	(in thousands, except share and per share amounts)
Net income to shareholders	$	15,633		$	18,450
Weighted average common shares outstanding:
Basic	29,764,320			29,289,588
Common share equivalents	428,983			1,037,835
Diluted	30,193,303			30,327,423
Earnings per share:
Basic	$	0.53		$	0.63
Common share equivalents	(0.01		)	(0.02		)
Diluted	$	0.52		$	0.61

Common share equivalents relate to stock options and restricted share units (“RSU’s”). For the three months ended March 31, 2018 and 2017, common share equivalents of 192,817 and 97,755 shares, respectively, were excluded from the calculations of diluted earnings per share as their effects were anti-dilutive.

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Reserve for Losses and Loss Adjustment Expenses

3 Months Ended

Mar. 31, 2018

Liability for Claims and Claims Adjustment Expense [Abstract]

Reserve for Losses and Loss Adjustment Expenses

Reserve for Losses and Loss Adjustment Expenses

The following table provides a reconciliation of the beginning and ending reserve balances for losses and loss adjustment expenses, net of reinsurance, to the gross amounts reported in the condensed consolidated balance sheets:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at beginning of period	$	989,825		$	761,128
Add: Incurred losses and loss adjustment expenses net of reinsurance:
Current year	146,382			108,783
Prior years	(2,610		)	(3,414		)
Total incurred losses and loss and adjustment expenses	143,772			105,369
Deduct: Loss and loss adjustment expense payments net of reinsurance:
Current year	12,177			3,698
Prior years	83,117			71,018
Total loss and loss adjustment expense payments	95,294			74,716
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at end of period	1,038,303			791,781
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	331,245			188,782
Reserve for losses and loss adjustment expenses gross of reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	$	1,369,548		$	980,563

The Company experienced $2.6 million of favorable reserve development in the three months ended March 31, 2018 on the reserve for losses and loss adjustment expenses held at December 31, 2017. This reserve development included $1.1 million of favorable development in the Excess and Surplus Lines segment, primarily from the 2016 and 2017 accident years. This favorable development occurred because our actuarial studies at March 31, 2018 for the Excess and Surplus Lines segment indicated that our loss experience on our casualty business continues to be below our initial expected loss ratios. The Specialty Admitted Insurance segment experienced $1.3 million of favorable development, primarily due to favorable development in the workers' compensation business for the 2014 through 2016 accident years. The Company also experienced $176,000 of favorable development in the Casualty Reinsurance segment.

The Company experienced $3.4 million of favorable reserve development in the three months ended March 31, 2017 on the reserve for losses and loss adjustment expenses held at December 31, 2016. This reserve development included $3.2 million of favorable development in the Excess and Surplus Lines segment, primarily from the 2016 and 2014 accident years which were partially offset by adverse development in the 2006 accident year. This favorable development occurred because our actuarial studies at March 31, 2017 for the Excess and Surplus Lines segment indicated that our loss experience on our casualty business continues to be below our initial expected loss ratios. In addition, the Specialty Admitted Insurance segment experienced $42,000 of favorable development and the Casualty Reinsurance segment experienced $145,000 of favorable development.

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Other Comprehensive Income

3 Months Ended

Mar. 31, 2018

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Other Comprehensive Income

Other Comprehensive (Loss) Income

The following table summarizes the components of other comprehensive income:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Unrealized (losses) gains arising during the period, before U.S. income taxes	$	(19,292	)	$	5,998
U.S. income taxes	544			(1,636		)
Unrealized (losses) gains arising during the period, net of  U.S. income taxes	(18,748		)	4,362
Less reclassification adjustment:
Net realized investment (losses) gains	(201		)	450
U.S. income tax expenses	—			(122		)
Reclassification adjustment for investment (losses) gains realized in net income	(201		)	328
Other comprehensive (loss) income	$	(18,547	)	$	4,034

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Contingent Liabilities

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Contingent Liabilities

Contingent Liabilities

The Company is a party to various lawsuits arising in the ordinary course of its operations. The Company believes that the ultimate resolution of these matters will not materially impact its financial position, cash flows, or results of operations.

The Company’s reinsurance subsidiary, JRG Re, has entered into three letter of credit facilities with banks as security to third-party reinsureds on reinsurance assumed by JRG Re. JRG Re has established custodial accounts to secure these letters of credit. Under a $100.0 million facility, $52.2 million of letters of credit were issued through March 31, 2018 which were secured by deposits of $64.2 million. Under a $102.5 million facility, $98.6 million of letters of credit were issued through March 31, 2018 which were secured by deposits of $125.9 million. Under a $100.0 million facility, $6.9 million of letters of credit were issued through March 31, 2018 which were secured by deposits of $10.0 million. JRG Re has also established trust accounts to secure its obligations to selected reinsureds. The total amount deposited in the trust accounts for the benefit of third-party reinsureds was $283.1 million at March 31, 2018.

The Company is also exposed to credit risk relating to a set of insurance contracts with an insured group of companies under which the Company pays losses and loss adjustment expenses on the contract. The Company has indemnity agreements with this group of insured parties (non-insurance entities) and is contractually entitled to receive reimbursement for a significant portion of the losses and loss adjustment expenses paid on behalf of the insured parties and other expenses incurred by the Company. The insured parties are required to collateralize all amounts currently due to the Company and to provide additional collateral sufficient to cover the amounts that may be recoverable under the indemnity agreement, including among other things case loss and loss adjustment expense reserves, IBNR loss and loss adjustment expense reserves, extra contractual obligations and excess of policy limits liabilities. This collateral is currently provided through a collateral trust arrangement established in favor of the Company by a captive insurance company affiliate of the insured group. At March 31, 2018, the cash equivalent collateral held in the collateral trust arrangement was approximately $860.6 million, which exceeds the amount of claims receivable and unpaid reported losses and loss adjustment expenses outstanding. This is a rapidly growing relationship, and as such, there is ongoing exposure to estimated losses and expenses on these contracts growing at a faster pace than growth in our collateral balances. In addition, we have credit exposure if our estimates of future losses and loss adjustment expenses and other amounts recoverable, which are the basis for establishing collateral balances, are lower than actual amounts paid or payable. The amount of our credit exposure in any of these instances could be material. To mitigate these risks, we closely and frequently monitor our exposure compared to our collateral held, and we request additional collateral when our analysis indicates that we have uncollateralized exposure.

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Segment Information

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company has four reportable segments: the Excess and Surplus Lines segment, the Specialty Admitted Insurance segment, the Casualty Reinsurance segment, and the Corporate and Other segment. Segment profit (loss) is measured by underwriting profit (loss), which is generally defined as net earned premiums less loss and loss adjustment expenses and other operating expenses of the operating segments. Gross fee income of the Excess and Surplus Lines segment is included in that segment’s underwriting profit. For the three months ended March 31, 2018 and 2017, gross fee income of $4.8 million and $3.8 million, respectively, was included in underwriting profit. Segment results are reported prior to the effects of intercompany reinsurance agreements among the Company’s insurance subsidiaries.

The following table summarizes the Company’s segment results:

	Excess and Surplus Lines		Specialty Admitted Insurance		Casualty Reinsurance		Corporate and Other		Total
	(in thousands)
Three Months Ended March 31, 2018
Gross written premiums	$	167,486	$	87,401	$	43,229	$	—	$	298,116
Net earned premiums	129,971		13,340		57,631		—		200,942
Underwriting profit of insurance segments	11,299		1,623		1,744		—		14,666
Net investment income	3,042		711		8,017		1,486		13,256
Interest expense	—		—		—		2,522		2,522
Segment revenues	137,327		13,955		65,526		1,536		218,344
Segment goodwill	181,831		—		—		—		181,831
Segment assets	909,963		495,096		1,368,872		88,079		2,862,010
Three Months Ended March 31, 2017
Gross written premiums	$	108,995	$	72,464	$	42,720	$	—	$	224,179
Net earned premiums	93,849		16,253		44,585		—		154,687
Underwriting profit of insurance segments	8,800		842		1,093		—		10,735
Net investment income	3,183		636		7,124		5,790		16,733
Interest expense	—		—		—		2,123		2,123
Segment revenues	101,090		16,924		52,146		6,242		176,402
Segment goodwill	181,831		—		—		—		181,831
Segment assets	749,617		335,806		1,211,896		114,006		2,411,325

The following table reconciles the underwriting profit of the operating segments by individual segment to consolidated income before taxes:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Underwriting profit of the insurance segments:
Excess and Surplus Lines	$	11,299		$	8,800
Specialty Admitted Insurance	1,623			842
Casualty Reinsurance	1,744			1,093
Total underwriting profit of insurance segments	14,666			10,735
Other operating expenses of the Corporate and Other segment	(7,431		)	(6,461		)
Underwriting profit	7,235			4,274
Net investment income	13,256			16,733
Net realized investment (losses) gains	(810		)	1,047
Amortization of intangible assets	(149		)	(149		)
Other income and expenses	104			200
Interest expense	(2,522		)	(2,123		)
Income before taxes	$	17,114		$	19,982

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Other Operating Expenses and Other Expenses

3 Months Ended

Mar. 31, 2018

Other Operating Expenses And Other Expenses [Abstract]

Other Operating Expenses and Other Expenses

Other Operating Expenses and Other Expenses

Other operating expenses consist of the following:

	Three Months Ended March 31,
	2018		2017
	(in thousands)
Amortization of policy acquisition costs	$	30,198	$	27,638
Other underwriting expenses of the operating segments	17,154		14,794
Other operating expenses of the Corporate and Other segment	7,431		6,461
Total	$	54,783	$	48,893

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Fair Value Measurements

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Three levels of inputs are used to measure fair value of financial instruments: (1) Level 1: quoted price (unadjusted) in active markets for identical assets, (2) Level 2: inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the instrument, and (3) Level 3: inputs to the valuation methodology are unobservable for the asset or liability.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date.

To measure fair value, the Company obtains quoted market prices for its investment securities from its outside investment managers. If a quoted market price is not available, the Company uses prices of similar securities. Values for U.S. Treasury and publicly-traded equity securities are generally based on Level 1 inputs which use the market approach valuation technique. The values for all other fixed maturity securities (including state and municipal securities and obligations of U.S. government corporations and agencies) generally incorporate significant Level 2 inputs, and in some cases, Level 3 inputs, using the market approach and income approach valuation techniques. There have been no changes in the Company’s use of valuation techniques since December 31, 2016.

The Company reviews fair value prices provided by its outside investment managers for reasonableness by comparing the fair values provided by the managers to those provided by its investment custodian. The Company also reviews and monitors changes in unrealized gains and losses. The Company has not historically adjusted security prices. The Company obtains an understanding of the methods, models and inputs used by the investment managers and independent pricing services, and controls are in place to validate that prices provided represent fair values. The Company’s control process includes, but is not limited to, initial and ongoing evaluation of the methodologies used, a review of specific securities and an assessment for proper classification within the fair value hierarchy, and obtaining and reviewing internal control reports for our investment manager that obtains fair values from independent pricing services.

 Assets measured at fair value on a recurring basis as of March 31, 2018 are summarized below:

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
Available-for-sale securities:
Fixed maturity securities:
State and municipal	$	—	$	139,725	$	—	$	139,725
Residential mortgage-backed	—		181,098		—		181,098
Corporate	—		439,626		—		439,626
Commercial mortgage and asset-backed	—		186,124		4,680		190,804
Obligations of U.S. government corporations and agencies	—		7,775		—		7,775
U.S. Treasury securities and obligations guaranteed by the U.S. government	81,640		579		—		82,219
Redeemable preferred stock	—		2,004		—		2,004
Total fixed maturity securities	81,640		956,931		4,680		1,043,251
Equity securities:
Preferred stock	—		67,709		—		67,709
Common stock	14,732		3,516		—		18,248
Total equity securities	14,732		71,225		—		85,957
Total available-for-sale securities	$	96,372	$	1,028,156	$	4,680	$	1,129,208
Trading securities:
Fixed maturity securities	$	—	$	3,805	$	—	$	3,805
Short-term investments	$	1,000	$	25,235	$	—	$	26,235

Assets measured at fair value on a recurring basis as of December 31, 2017 are summarized below:

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
Available-for-sale securities:
Fixed maturity securities:
State and municipal	$	—	$	144,366	$	—	$	144,366
Residential mortgage-backed	—		158,661		—		158,661
Corporate	—		413,721		—		413,721
Commercial mortgage and asset-backed	—		177,931		4,680		182,611
Obligations of U.S. government corporations and agencies	—		35,847		—		35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government	78,265		609		—		78,874
Redeemable preferred stock	—		2,018		—		2,018
Total fixed maturity securities	78,265		933,153		4,680		1,016,098
Equity securities:
Preferred stock	—		66,281		—		66,281
Common stock	15,507		734		—		16,241
Total equity securities	15,507		67,015		—		82,522
Total available-for-sale securities	$	93,772	$	1,000,168	$	4,680	$	1,098,620
Trading securities:
Fixed maturity securities	$	—	$	3,808	$	—	$	3,808
Short-term investments	$	1,000	$	35,804	$	—	$	36,804

The beginning and ending balances of assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of one available-for-sale fixed maturity security with a fair value of $4.7 million, and there was no activity (purchases, sales, transfers) involving Level 3 securities for the three months ended March 31, 2018 and 2017. A market approach using prices in trades of comparable securities was utilized to determine the fair value for this security at March 31, 2018 and December 31, 2017.

Transfers out of Level 3 occur when the Company is able to obtain reliable prices from pricing vendors for securities for which the Company was previously unable to obtain reliable prices. Transfers in to Level 3 occur when the Company is unable to obtain reliable prices for securities from pricing vendors and instead must use broker price quotes to value the securities.

There were no transfers between Level 1 and Level 2 during the three months ended March 31, 2018 or 2017. The Company recognizes transfers between levels at the beginning of the reporting period.

There were no realized gains or losses included in earnings for the three months ended March 31, 2018 attributable to the change in unrealized gains or losses relating to Level 3 assets valued at fair value on a recurring basis that are still held at March 31, 2018.

The Company measures certain bank loan participations at fair value on a non-recurring basis during the year as part of the Company’s impairment evaluation when loans are determined by management to be impaired.

Assets measured at fair value on a nonrecurring basis are summarized below:

	Fair Value Measurements Using
	Quoted Prices In Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
March 31, 2018
Bank loan participations held-for-investment	$	—	$	—	$	1,741	$	1,741
December 31, 2017
Bank loan participations held-for-investment	$	—	$	—	$	5,111	$	5,111

Bank loan participations held-for-investment that were determined to be impaired were written down to their fair value of $1.7 million at March 31, 2018 and $5.1 million at December 31, 2017.

In the determination of the fair value for bank loan participations and certain high yield bonds, the Company’s investment manager endeavors to obtain data from multiple external pricing sources. External pricing sources may include brokers, dealers and price data vendors that provide a composite price based on prices from multiple dealers. Such external pricing sources typically provide valuations for normal institutional size trading units of such securities using methods based on market transactions for comparable securities, and various relationships between securities, as generally recognized by institutional dealers. For investments in which the investment manager determines that only one external pricing source is appropriate or if only one external price is available, the relevant investment is generally recorded at fair value based on such price.

Investments for which external sources are not available or are determined by the investment manager not to be representative of fair value are recorded at fair value as determined by the Company, with input from its investment managers and valuation specialists as considered necessary. In determining the fair value of such investments, the Company considers one or more of the following factors: type of security held, convertibility or exchangeability of the security, redeemability of the security (including the timing of redemptions), application of industry accepted valuation models, recent trading activity, liquidity, estimates of liquidation value, purchase cost, and prices received for securities with similar terms of the same issuer or similar issuers. At March 31, 2018, there were no investments for which external sources were unavailable to determine fair value. At December 31, 2017, there was one bank loan participation with an unpaid principal balance of $807,000 and a carrying value of zero for which external sources were unavailable to determine fair value.

The carrying values and fair values of financial instruments are summarized below:

	March 31, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Assets
Available-for-sale:
Fixed maturity securities	$	1,043,251	$	1,043,251	$	1,016,098	$	1,016,098
Equity securities	85,957		85,957		82,522		82,522
Trading:
Fixed maturity securities	3,805		3,805		3,808		3,808
Bank loan participations held-for-investment	257,426		257,840		238,214		236,532
Cash and cash equivalents	151,046		151,046		163,495		163,495
Short-term investments	26,235		26,235		36,804		36,804
Other invested assets – notes receivable	13,250		19,056		11,778		17,104
Liabilities
Senior debt	98,300		98,871		98,300		97,884
Junior subordinated debt	104,055		118,752		104,055		116,569

The fair values of fixed maturity securities and equity securities have been determined using quoted market prices for securities traded in the public market or prices using bid or closing prices for securities not traded in the public marketplace. The fair values of cash and cash equivalents and short-term investments approximate their carrying values due to their short-term maturity.

The fair values of other invested assets-notes receivable, senior debt, and junior subordinated debt at March 31, 2018 and December 31, 2017 were determined by calculating the present value of expected future cash flows under the terms of the note agreements or debt agreements, as applicable, discounted at an estimated market rate of interest at March 31, 2018 and December 31, 2017, respectively.

The fair values of bank loan participations held-for-investment, senior debt, and junior subordinated debt at March 31, 2018 and December 31, 2017 were determined using inputs to the valuation methodology that are unobservable (Level 3).

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Capital Stock and Equity Awards

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Capital Stock and Equity Awards

Capital Stock and Equity Awards

The Company issued 170,023 common shares in the three months ended March 31, 2018 with 127,196 new shares related to stock option exercises and 42,827 new shares related to vesting of RSUs. The total common shares outstanding increased from 29,696,682 at December 31, 2017 to 29,866,705 at March 31, 2018.

The Company declared the following dividends during the first three months of 2018 and 2017:

Date of Declaration	Dividend per Common Share		Payable to Shareholders of Record on	Payment Date	Total Amount
2018
February 22, 2018	$	0.30	March 12, 2018	March 30, 2018	$	9.0	million
2017
February 14, 2017	$	0.30	March 13, 2017	March 31, 2017	$	8.9	million

Included in the dividends are $99,000 and $77,000 of dividend equivalents on RSUs, respectively. The balance of dividends payable was $409,000 at March, 31, 2018 and $434,000 at December 31, 2017.

Equity Incentive Plans

The Company’s shareholders have approved various equity incentive plans, including the Amended and Restated 2009 Equity Incentive Plan (the “Legacy Plan”), the 2014 Long Term Incentive Plan (“2014 LTIP”), and the 2014 Non-Employee Director Incentive Plan (“2014 Director Plan”) (collectively, the “Plans”). All awards issued under the Plans are issued at the discretion of the Board of Directors. Under the Legacy Plan, employees received non-qualified stock options. Options are outstanding under the Legacy Plan; however, no additional awards may be granted.

Employees are eligible to receive non-qualified stock options, incentive stock options, share appreciation rights, performance shares, restricted shares, RSUs, and other awards under the 2014 LTIP. The maximum number of shares available for issuance under the 2014 LTIP is 4,171,150, and at March 31, 2018, 1,658,715 shares are available for grant.

Non-employee directors of the Company are eligible to receive non-qualified stock options, share appreciation rights, performance shares, restricted shares, restricted share units, and other awards under the 2014 Director Plan. The maximum number of shares available for issuance under the 2014 Director Plan is 50,000, and at March 31, 2018, 21,663 shares are available for grant.

Generally, awards issued under the 2014 LTIP and 2014 Director Plan vest immediately in the event that an award recipient is terminated without Cause (as defined), and in the case of the 2014 LTIP for Good Reason (as defined), at any time following a Change in Control (as defined in the applicable plans).

Options

The following table summarizes the option activity for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Outstanding:
Beginning of period	1,479,236		$	27.81	2,234,699		$	22.84
Granted	—		$	—	195,509		$	42.17
Exercised	(142,129	)	$	20.14	(97,211	)	$	17.23
Forfeited	—		$	—	(50,062	)	$	27.97
End of period	1,337,107		$	28.63	2,282,935		$	24.62
Exercisable, end of period	983,508		$	26.06	1,334,756		$	20.47

All of the outstanding options vest over three or four years and have a contractual life of seven years from the original date of grant. All of the outstanding options have an exercise price greater than or equal to the fair value of the underlying shares at the date of grant. The weighted-average remaining contractual life of the options outstanding and options exercisable was 4.4 years and 4.0 years, respectively.

RSUs

The following table summarizes the RSU activity for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted- Average Grant Date Fair Value		Shares		Weighted- Average Grant Date Fair Value
Unvested, beginning of period	178,882		$	37.93	196,800		$	24.38
Granted	214,907		$	39.81	117,879		$	42.17
Vested	(62,714	)	$	40.90	(37,485	)	$	32.07
Forfeited	—		$	—	(19,743	)	$	24.06
Unvested, end of period	331,075		$	38.59	257,451		$	31.43

The vesting period of RSUs granted to employees range from one to five years and vest ratably over the respective vesting period, and the majority vest in three years. All RSUs granted to date to non-employee directors had a one year vesting period. The holders of RSUs are entitled to dividend equivalents. The dividend equivalents are settled in cash at the same time that the underlying RSUs vest and are subject to the same risk of forfeiture as the underlying shares. The fair value of the RSUs granted is based on the market price of the underlying shares.

Compensation Expense

Share based compensation expense is recognized on a straight line basis over the vesting period. The amount of expense and related tax benefit is summarized below:

	Three Months Ended March 31,
	2018		2017
	(in thousands)
Share based compensation expense	$	1,455	$	1,794
U.S. tax benefit on share based compensation expense	173		469

As of March 31, 2018, the Company had $14.0 million of unrecognized share based compensation expense expected to be charged to earnings over a weighted-average period of 2.3 years.

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Subsequent Events

3 Months Ended

Mar. 31, 2018

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On May 1, 2018, the Board of Directors declared a cash dividend of $0.30 per common share. The dividend is payable on June 29, 2018 to shareholders of record on June 11, 2018.

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Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2018

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 (“GAAP”) for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated financial statements include the results of the Company and its subsidiaries from their respective dates of inception or acquisition, as applicable. Readers are urged to review the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for a more complete description of the Company’s business and accounting policies. 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. Interim results are not necessarily indicative of results of operations for the full year. The consolidated balance sheet as of December 31, 2017 was derived from the Company’s audited annual consolidated financial statements.

Intercompany transactions and balances have been eliminated.

Estimates and Assumptions

Estimates and Assumptions

Preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying disclosures. Those estimates are inherently subject to change, and actual results may ultimately differ from those estimates.

Variable Interest Entities

Variable Interest Entities

Entities that do not have sufficient equity at risk to allow the entity to finance its activities without additional financial support or in which the equity investors, as a group, do not have the characteristic of a controlling financial interest are referred to as variable interest entities (“VIE”). A VIE is consolidated by the variable interest holder that is determined to have the controlling financial interest (primary beneficiary) as a result of having both the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company determines whether it is the primary beneficiary of an entity subject to consolidation based on a qualitative assessment of the VIE’s capital structure, contractual terms, nature of the VIE’s operations and purpose, and the Company’s relative exposure to the related risks of the VIE on the date it becomes initially involved in the VIE. The Company reassesses its VIE determination with respect to an entity on an ongoing basis.

The Company holds interests in VIEs through certain equity method investments included in “other invested assets” in the accompanying condensed consolidated balance sheets. The Company has determined that it should not consolidate any of the VIEs as it is not the primary beneficiary in any of the relationships. Although the investments resulted in the Company holding variable interests in the entities, they did not empower the Company to direct the activities that most significantly impact the economic performance of the entities.

Income Tax Expense

Income Tax Expense

Our effective tax rate fluctuates from period to period based on the relative mix of income reported by country and the respective tax rates imposed by each tax jurisdiction. For the three months ended March 31, 2018 and 2017, our U.S. federal income tax expense was 8.7% and 7.7% of income before taxes, respectively. For U.S.-sourced income, the Company’s U.S. federal income tax expense differs from the amounts computed by applying the federal statutory income tax rate (21% in 2018 and 35% in 2017) to income before taxes due primarily to interest income on tax-advantaged state and municipal securities (state and municipal securities represent 12.4% and 10.9% of our available-for-sale securities at March 31, 2018 and 2017, respectively), dividends received income, and excess tax benefits on share based compensation.

Adopted Accounting Standards

Adopted Accounting Standards

Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance applies to all companies that either enter into contracts with customers to transfer goods or services or enter into contracts for the transfer of nonfinancial assets, unless those contracts are within the scope of other standards, such as insurance contracts. Under this guidance, a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Judgments required in adopting this update may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The adoption of ASU 2014-09 had no impact on reported fee income and there was no cumulative effect of initially applying the update.

Effective January 1, 2018, the Company adopted ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. Among other things, this ASU requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. Upon adoption on January 1, 2018, the Company made a $4.7 million cumulative-effect adjustment to increase retained earnings and reduce accumulated other comprehensive income. The adoption of ASU 2016-01 did not materially impact the Company's financial position, cash flows, or total comprehensive income. The Company's results of operations were impacted as changes in fair value of equity instruments are now presented in net income rather than other comprehensive (loss) income. For the three months ended March 31, 2018, the impact was a $1.4 million reduction in net income and a $0.05 reduction in basic and diluted earnings per share.

Effective January 1, 2018, the Company adopted ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This update was issued as a result of the enactment of the TCJA on December 22, 2017. The ASU allows for the option to reclassify the stranded tax effects resulting from the implementation of the TCJA out of accumulated other comprehensive income and into retained earnings. As the adoption of ASU 2016-01 in 2018 resulted in the reclassification of the entire unrealized balance on equity securities from accumulated other comprehensive income into retained earnings, only the stranded tax effects on the unrealized balances of fixed income securities were impacted by the adoption of ASU 2018-02. The reclassification resulted in a $711,000 decrease to the Company's retained earnings with a corresponding increase to accumulated other comprehensive income in the first quarter of 2018.

Prospective Accounting Standards

Prospective Accounting Standards

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend beyond 12 months. This ASU is effective for annual and interim reporting periods beginning after December 15, 2018. Upon adoption, leases will be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. The Company is currently evaluating ASU 2016-02 to determine the potential impact that adopting this standard will have on its financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of 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 financial assets measured at amortized cost, such as bank loan participations held for investment, 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, with the amount of the allowance limited to the amount by which fair value is below amortized cost. This ASU is effective for annual and interim reporting periods beginning after December 15, 2019. Upon adoption, this ASU 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 has not yet completed the analysis of how adopting this ASU will affect the Company’s financial statements.

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Investments (Tables)

3 Months Ended

Mar. 31, 2018

Investments [Abstract]

Schedule of summary of available-for-sale investments

The Company’s available-for-sale investments are summarized as follows:

	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
March 31, 2018
Fixed maturity securities:
State and municipal	$	137,478	$	4,029	$	(1,782	)	$	139,725
Residential mortgage-backed	186,279		509		(5,690		)	181,098
Corporate	445,058		3,054		(8,486		)	439,626
Commercial mortgage and asset-backed	192,941		173		(2,310		)	190,804
Obligations of U.S. government corporations and agencies	7,804		—		(29		)	7,775
U.S. Treasury securities and obligations guaranteed by the U.S. government	83,317		73		(1,171		)	82,219
Redeemable preferred stock	2,025		—		(21		)	2,004
Total fixed maturity securities	1,054,902		7,838		(19,489		)	1,043,251
Equity securities	80,464		6,845		(1,352		)	85,957
Total investments available-for-sale	$	1,135,366	$	14,683	$	(20,841	)	$	1,129,208
December 31, 2017
Fixed maturity securities:
State and municipal	$	139,382	$	5,587	$	(603	)	$	144,366
Residential mortgage-backed	160,379		723		(2,441		)	158,661
Corporate	408,857		7,503		(2,639		)	413,721
Commercial mortgage and asset-backed	182,595		714		(698		)	182,611
Obligations of U.S. government corporations and agencies	35,948		—		(101		)	35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government	79,476		37		(639		)	78,874
Redeemable preferred stock	2,025		—		(7		)	2,018
Total fixed maturity securities	1,008,662		14,564		(7,128		)	1,016,098
Equity securities	75,318		7,830		(626		)	82,522
Total investments available-for-sale	$	1,083,980	$	22,394	$	(7,754	)	$	1,098,620

Schedule of summary of available-for-sale investments by contractual maturity

The amortized cost and fair value of available-for-sale investments in fixed maturity securities at March 31, 2018 are summarized, by contractual maturity, as follows:

	Cost or Amortized Cost		Fair Value
	(in thousands)
One year or less	$	33,850	$	33,743
After one year through five years	327,069		323,368
After five years through ten years	185,400		181,026
After ten years	127,338		131,208
Residential mortgage-backed	186,279		181,098
Commercial mortgage and asset-backed	192,941		190,804
Redeemable preferred stock	2,025		2,004
Total	$	1,054,902	$	1,043,251

Schedule of gross unrealized losses and fair value for available-for-sale securities

The following table shows the Company’s gross unrealized losses and fair value for available-for-sale securities aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position:

	Less Than 12 Months					12 Months or More					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
March 31, 2018
Fixed maturity securities:
State and municipal	$	61,275	$	(1,325	)	$	10,454	$	(457	)	$	71,729	$	(1,782	)
Residential mortgage-backed	90,188		(1,743		)	79,455		(3,947		)	169,643		(5,690		)
Corporate	260,523		(5,309		)	64,506		(3,177		)	325,029		(8,486		)
Commercial mortgage and asset-backed	94,429		(1,578		)	22,658		(732		)	117,087		(2,310		)
Obligations of U.S. government corporations and agencies	—		—			7,775		(29		)	7,775		(29		)
U.S. Treasury securities and obligations guaranteed by the U.S. government	53,118		(913		)	18,080		(258		)	71,198		(1,171		)
Redeemable preferred stock	2,004		(21		)	—		—			2,004		(21		)
Total fixed maturity securities	561,537		(10,889		)	202,928		(8,600		)	764,465		(19,489		)
Equity securities	17,816		(811		)	5,685		(541		)	23,501		(1,352		)
Total investments available-for-sale	$	579,353	$	(11,700	)	$	208,613	$	(9,141	)	$	787,966	$	(20,841	)
December 31, 2017
Fixed maturity securities:
State and municipal	$	40,117	$	(318	)	$	10,662	$	(285	)	$	50,779	$	(603	)
Residential mortgage-backed	50,447		(261		)	84,193		(2,180		)	134,640		(2,441		)
Corporate	113,464		(846		)	66,954		(1,793		)	180,418		(2,639		)
Commercial mortgage and asset-backed	53,965		(244		)	25,299		(454		)	79,264		(698		)
Obligations of U.S. government corporations and agencies	3,024		(1		)	32,154		(100		)	35,178		(101		)
U.S. Treasury securities and obligations guaranteed by the U.S. government	50,760		(430		)	26,707		(209		)	77,467		(639		)
Redeemable preferred stock	2,018		(7		)	—		—			2,018		(7		)
Total fixed maturity securities	313,795		(2,107		)	245,969		(5,021		)	559,764		(7,128		)
Equity securities	5,859		(65		)	5,665		(561		)	11,524		(626		)
Total investments available-for-sale	$	319,654	$	(2,172	)	$	251,634	$	(5,582	)	$	571,288	$	(7,754	)

Schedule of summary of realized gains and losses

The Company’s realized gains and losses are summarized as follows:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Fixed maturity securities:
Gross realized gains	$	22		$	338
Gross realized losses	(223		)	(296		)
	(201		)	42
Bank loan participations:
Gross realized gains	1,220			1,136
Gross realized losses	(100		)	(539		)
	1,120			597
Equity securities:
Gross realized gains	—			409
Gross realized losses	(15		)	—
Changes in fair values of equity securities	(1,710		)	—
	(1,725		)	409
Short-term investments and other:
Gross realized gains	—			—
Gross realized losses	(4		)	(1		)
	(4		)	(1		)
Total	$	(810	)	$	1,047

Schedule of other invested assets

The Company invests selectively in private debt and equity opportunities. These investments, which together comprise the Company’s other invested assets, are primarily focused in renewable energy, limited partnerships, and bank holding companies.

	Carrying Value				Investment Income
	March 31,		December 31,		Three Months Ended March 31,
	2018		2017		2018		2017
	(in thousands)
Renewable energy LLCs (a)	$	32,592	$	32,063	$	1,211	$	5,594
Renewable energy notes receivable (b)	8,750		7,278		297		—
Limited partnerships (c)	29,132		26,367		226		382
Bank holding companies (d)	4,500		4,500		86		86
Total other invested assets	$	74,974	$	70,208	$	1,820	$	6,062

(a) The Company’s Corporate and Other segment owns equity interests ranging from 2.6% to 32.8% in various LLCs whose principal objective is capital appreciation and income generation from owning and operating renewable energy production facilities (wind and solar). The LLCs are managed by an affiliate of the Company’s largest shareholder and the Company’s Non-Exucitive Chairman has invested in certain of these LLCs. The equity method is used to account for the Company’s LLC investments. Income for the LLCs primarily reflects adjustments to the carrying values of investments in renewable energy projects to their determined fair values. The fair value adjustments are included in revenues for the LLCs. Expenses for the LLCs are not significant and are comprised of administrative and interest expenses. The Company received cash distributions from these investments totaling $1.2 million and $1.6 million in the three months ended March 31, 2018 and 2017, respectively.

(b) The Company has invested in notes receivable for renewable energy projects. At March 31, 2018, the Company holds an $8.8 million note issued by an affiliate of the Company’s largest shareholder. Interest on the note, which matures in 2021, is fixed at 15.0%. Interest income on the note was $297,000 for the three months ended March 31, 2018.

(c) The Company owns investments in limited partnerships that invest in concentrated portfolios including publicly-traded small cap equities, loans of middle market private equity sponsored companies, equity tranches of collateralized loan obligations (“CLOs”), and tranches of distressed home loans. Income from the partnerships is recognized under the equity method of accounting. The Company’s Corporate and Other segment held an investment in a limited partnership with a carrying value of $2.9 million at March 31, 2018. The Company recognized investment losses of $125,000 and investment income of $68,000 on the investment for the three months ended March 31, 2018 and 2017, respectively. The Company’s Excess and Surplus Lines segment holds investments in limited partnerships of $26.3 million at March 31, 2018. Investment income of $351,000 and $314,000 was recognized on the investments for the three months ended March 31, 2018 and 2017, respectively. At March 31, 2018, the Company’s Excess and Surplus Lines segment has outstanding commitments to invest another $2.6 million in these limited partnerships.

(d) The Company holds $4.5 million of subordinated notes issued by a bank holding company. Interest on the notes, which mature on August 12, 2023, is fixed at 7.6% per annum. Interest income on the notes was $86,000 in both three months ended March 31, 2018 and 2017. The Company’s Chairman was previously the Lead Independent Director of the bank holding company and an investor in the bank holding company. Additionally, one of the Company’s directors was an investor in the bank holding company and is currently a lender to the bank holding company.

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of gross carrying amounts and accumulated amortization

The gross carrying amounts and accumulated amortization for each major specifically identifiable intangible asset class were as follows: 

		March 31, 2018				December 31, 2017
	Life (Years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
		($ in thousands)
Intangible Assets
Trademarks	Indefinite	$	22,200	$	—	$	22,200	$	—
Insurance licenses and authorities	Indefinite	9,164		—		9,164		—
Identifiable intangibles not subject to amortization		31,364		—		31,364		—
Broker relationships	24.6	11,611		4,790		11,611		4,641
Identifiable intangible assets subject to amortization		11,611		4,790		11,611		4,641
		$	42,975	$	4,790	$	42,975	$	4,641

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of reconciliation of numerator and denominator of basic and diluted 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 condensed consolidated financial statements:

	Three Months Ended March 31,
	2018			2017
	(in thousands, except share and per share amounts)
Net income to shareholders	$	15,633		$	18,450
Weighted average common shares outstanding:
Basic	29,764,320			29,289,588
Common share equivalents	428,983			1,037,835
Diluted	30,193,303			30,327,423
Earnings per share:
Basic	$	0.53		$	0.63
Common share equivalents	(0.01		)	(0.02		)
Diluted	$	0.52		$	0.61

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Reserve for Losses and Loss Adjustment Expenses (Tables)

3 Months Ended

Mar. 31, 2018

Liability for Claims and Claims Adjustment Expense [Abstract]

Schedule of reconciliation of beginning and ending reserve balances for losses and loss adjustment expenses

The following table provides a reconciliation of the beginning and ending reserve balances for losses and loss adjustment expenses, net of reinsurance, to the gross amounts reported in the condensed consolidated balance sheets:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at beginning of period	$	989,825		$	761,128
Add: Incurred losses and loss adjustment expenses net of reinsurance:
Current year	146,382			108,783
Prior years	(2,610		)	(3,414		)
Total incurred losses and loss and adjustment expenses	143,772			105,369
Deduct: Loss and loss adjustment expense payments net of reinsurance:
Current year	12,177			3,698
Prior years	83,117			71,018
Total loss and loss adjustment expense payments	95,294			74,716
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at end of period	1,038,303			791,781
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	331,245			188,782
Reserve for losses and loss adjustment expenses gross of reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	$	1,369,548		$	980,563

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Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2018

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of components of comprehensive income

The following table summarizes the components of other comprehensive income:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Unrealized (losses) gains arising during the period, before U.S. income taxes	$	(19,292	)	$	5,998
U.S. income taxes	544			(1,636		)
Unrealized (losses) gains arising during the period, net of  U.S. income taxes	(18,748		)	4,362
Less reclassification adjustment:
Net realized investment (losses) gains	(201		)	450
U.S. income tax expenses	—			(122		)
Reclassification adjustment for investment (losses) gains realized in net income	(201		)	328
Other comprehensive (loss) income	$	(18,547	)	$	4,034

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of summary of company's segment results

The following table summarizes the Company’s segment results:

	Excess and Surplus Lines		Specialty Admitted Insurance		Casualty Reinsurance		Corporate and Other		Total
	(in thousands)
Three Months Ended March 31, 2018
Gross written premiums	$	167,486	$	87,401	$	43,229	$	—	$	298,116
Net earned premiums	129,971		13,340		57,631		—		200,942
Underwriting profit of insurance segments	11,299		1,623		1,744		—		14,666
Net investment income	3,042		711		8,017		1,486		13,256
Interest expense	—		—		—		2,522		2,522
Segment revenues	137,327		13,955		65,526		1,536		218,344
Segment goodwill	181,831		—		—		—		181,831
Segment assets	909,963		495,096		1,368,872		88,079		2,862,010
Three Months Ended March 31, 2017
Gross written premiums	$	108,995	$	72,464	$	42,720	$	—	$	224,179
Net earned premiums	93,849		16,253		44,585		—		154,687
Underwriting profit of insurance segments	8,800		842		1,093		—		10,735
Net investment income	3,183		636		7,124		5,790		16,733
Interest expense	—		—		—		2,123		2,123
Segment revenues	101,090		16,924		52,146		6,242		176,402
Segment goodwill	181,831		—		—		—		181,831
Segment assets	749,617		335,806		1,211,896		114,006		2,411,325

Schedule of underwriting profit of operating segments by individual segment and reconciliation to consolidated income before taxes

The following table reconciles the underwriting profit of the operating segments by individual segment to consolidated income before taxes:

	Three Months Ended March 31,
	2018			2017
	(in thousands)
Underwriting profit of the insurance segments:
Excess and Surplus Lines	$	11,299		$	8,800
Specialty Admitted Insurance	1,623			842
Casualty Reinsurance	1,744			1,093
Total underwriting profit of insurance segments	14,666			10,735
Other operating expenses of the Corporate and Other segment	(7,431		)	(6,461		)
Underwriting profit	7,235			4,274
Net investment income	13,256			16,733
Net realized investment (losses) gains	(810		)	1,047
Amortization of intangible assets	(149		)	(149		)
Other income and expenses	104			200
Interest expense	(2,522		)	(2,123		)
Income before taxes	$	17,114		$	19,982

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Other Operating Expenses and Other Expenses (Tables)

3 Months Ended

Mar. 31, 2018

Other Operating Expenses And Other Expenses [Abstract]

Schedule of other operating expenses

Other operating expenses consist of the following:

	Three Months Ended March 31,
	2018		2017
	(in thousands)
Amortization of policy acquisition costs	$	30,198	$	27,638
Other underwriting expenses of the operating segments	17,154		14,794
Other operating expenses of the Corporate and Other segment	7,431		6,461
Total	$	54,783	$	48,893

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of assets measured at fair value on a recurring basis

Assets measured at fair value on a recurring basis as of March 31, 2018 are summarized below:

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
Available-for-sale securities:
Fixed maturity securities:
State and municipal	$	—	$	139,725	$	—	$	139,725
Residential mortgage-backed	—		181,098		—		181,098
Corporate	—		439,626		—		439,626
Commercial mortgage and asset-backed	—		186,124		4,680		190,804
Obligations of U.S. government corporations and agencies	—		7,775		—		7,775
U.S. Treasury securities and obligations guaranteed by the U.S. government	81,640		579		—		82,219
Redeemable preferred stock	—		2,004		—		2,004
Total fixed maturity securities	81,640		956,931		4,680		1,043,251
Equity securities:
Preferred stock	—		67,709		—		67,709
Common stock	14,732		3,516		—		18,248
Total equity securities	14,732		71,225		—		85,957
Total available-for-sale securities	$	96,372	$	1,028,156	$	4,680	$	1,129,208
Trading securities:
Fixed maturity securities	$	—	$	3,805	$	—	$	3,805
Short-term investments	$	1,000	$	25,235	$	—	$	26,235

Assets measured at fair value on a recurring basis as of December 31, 2017 are summarized below:

	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
Available-for-sale securities:
Fixed maturity securities:
State and municipal	$	—	$	144,366	$	—	$	144,366
Residential mortgage-backed	—		158,661		—		158,661
Corporate	—		413,721		—		413,721
Commercial mortgage and asset-backed	—		177,931		4,680		182,611
Obligations of U.S. government corporations and agencies	—		35,847		—		35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government	78,265		609		—		78,874
Redeemable preferred stock	—		2,018		—		2,018
Total fixed maturity securities	78,265		933,153		4,680		1,016,098
Equity securities:
Preferred stock	—		66,281		—		66,281
Common stock	15,507		734		—		16,241
Total equity securities	15,507		67,015		—		82,522
Total available-for-sale securities	$	93,772	$	1,000,168	$	4,680	$	1,098,620
Trading securities:
Fixed maturity securities	$	—	$	3,808	$	—	$	3,808
Short-term investments	$	1,000	$	35,804	$	—	$	36,804

Schedule of assets measured at fair value on a nonrecurring basis

Assets measured at fair value on a nonrecurring basis are summarized below:

	Fair Value Measurements Using
	Quoted Prices In Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
	(in thousands)
March 31, 2018
Bank loan participations held-for-investment	$	—	$	—	$	1,741	$	1,741
December 31, 2017
Bank loan participations held-for-investment	$	—	$	—	$	5,111	$	5,111

Schedule of carrying value and fair value

The carrying values and fair values of financial instruments are summarized below:

	March 31, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Assets
Available-for-sale:
Fixed maturity securities	$	1,043,251	$	1,043,251	$	1,016,098	$	1,016,098
Equity securities	85,957		85,957		82,522		82,522
Trading:
Fixed maturity securities	3,805		3,805		3,808		3,808
Bank loan participations held-for-investment	257,426		257,840		238,214		236,532
Cash and cash equivalents	151,046		151,046		163,495		163,495
Short-term investments	26,235		26,235		36,804		36,804
Other invested assets – notes receivable	13,250		19,056		11,778		17,104
Liabilities
Senior debt	98,300		98,871		98,300		97,884
Junior subordinated debt	104,055		118,752		104,055		116,569

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Capital Stock and Equity Awards (Tables)

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Schedule of dividends

The Company declared the following dividends during the first three months of 2018 and 2017:

Date of Declaration	Dividend per Common Share		Payable to Shareholders of Record on	Payment Date	Total Amount
2018
February 22, 2018	$	0.30	March 12, 2018	March 30, 2018	$	9.0	million
2017
February 14, 2017	$	0.30	March 13, 2017	March 31, 2017	$	8.9	million

Schedule of summary of option activity

The following table summarizes the option activity for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Outstanding:
Beginning of period	1,479,236		$	27.81	2,234,699		$	22.84
Granted	—		$	—	195,509		$	42.17
Exercised	(142,129	)	$	20.14	(97,211	)	$	17.23
Forfeited	—		$	—	(50,062	)	$	27.97
End of period	1,337,107		$	28.63	2,282,935		$	24.62
Exercisable, end of period	983,508		$	26.06	1,334,756		$	20.47

Schedule of summary of RSU activity

The following table summarizes the RSU activity for the three months ended March 31, 2018 and 2017:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted- Average Grant Date Fair Value		Shares		Weighted- Average Grant Date Fair Value
Unvested, beginning of period	178,882		$	37.93	196,800		$	24.38
Granted	214,907		$	39.81	117,879		$	42.17
Vested	(62,714	)	$	40.90	(37,485	)	$	32.07
Forfeited	—		$	—	(19,743	)	$	24.06
Unvested, end of period	331,075		$	38.59	257,451		$	31.43

Schedule of summary of amount of expense and related tax benefit

Share based compensation expense is recognized on a straight line basis over the vesting period. The amount of expense and related tax benefit is summarized below:

	Three Months Ended March 31,
	2018		2017
	(in thousands)
Share based compensation expense	$	1,455	$	1,794
U.S. tax benefit on share based compensation expense	173		469

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Accounting Policies - Narrative (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) company $ / shares	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of insurance companies based in the United States | company	6
Investment in variable interest entities	$ 32,600		$ 32,100
Effective U.S. federal income tax expense rate	8.70%	7.70%
Percentage of available for sale securities	12.40%	10.90%
Net income	$ (15,633)	$ (18,450)
ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of ASU	0
ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of ASU	0
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	(15,633)	$ (18,450)
Retained Earnings | ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of ASU	4,682
Net income	$ 1,400
Reduction in basic and diluted earnings per share | $ / shares	$ 0.05
Retained Earnings | ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of ASU	$ (711)

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Investments - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018 USD ($) issuer loan	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) loan	Dec. 31, 2016 USD ($)
Gain (Loss) on Investments [Line Items]
Number of available-for-sale securities held in an unrealized loss position | issuer	205
Total fair value of unrealized loss position securities	$ 787,966		$ 571,288
Total gross unrealized losses of unrealized loss position securities	$ 20,841		7,754
Percentage of available for sale securities	12.40%	10.90%
Fair value	$ 1,129,208		1,098,620
Impairment loss			1,500
Unpaid principal on impaired loans	2,100		8,400
Carrying value of loan	257,426		238,214
Allowance for credit losses on impaired loans	$ 300	$ 639	$ 3,200	$ 943
Number of impaired loans held | loan	2		5
Carrying value of impaired loans	$ 1,700		$ 5,100
Average recorded investment in impaired bank loans	3,400	5,300
Investment income during period loans were impaired	20	84
Net realized gain (loss) on changes in fair value of impaired bank loans	3	177
Net trading gains (losses) still held	3
Carrying value of collateralized loan obligation held	4,700
Net realized investment (losses) gains	(810)	1,047
Investment income	1,820	6,062
Bank Holding Company
Gain (Loss) on Investments [Line Items]
Net realized investment (losses) gains	409
Investment in certificate of deposit	1,000
Interest income	0	1
Fixed maturity securities
Gain (Loss) on Investments [Line Items]
Total fair value of unrealized loss position securities	764,465		559,764
Total gross unrealized losses of unrealized loss position securities	19,489		7,128
Fair value	1,043,251		1,016,098
Net realized investment (losses) gains	(201)	$ 42
Puerto Rico loan
Gain (Loss) on Investments [Line Items]
Unpaid principal on impaired loans	807
Carrying value of loan	0
Net realized investment (losses) gains	807
Oil and gas companies loan
Gain (Loss) on Investments [Line Items]
Unpaid principal on impaired loans	2,100		6,900
Carrying value of loan	4,700
Allowance for credit losses on impaired loans	$ 300		$ 2,300
Number of loans | loan	3
Bank loan participations gross unrealized losses	$ 143
Number of impaired loans held | loan	2		3
Carrying value of impaired loans	$ 1,700		$ 4,600
Non-energy sector loan
Gain (Loss) on Investments [Line Items]
Unpaid principal on impaired loans			706
Allowance for credit losses on impaired loans			$ 145
Number of impaired loans held | loan			1
Carrying value of impaired loans			$ 561
BBB- or better | Fixed maturity securities
Gain (Loss) on Investments [Line Items]
Percentage of available for sale securities	99.90%
Fair value	$ 868
Aggregate net unrealized gain (loss)	$ (26)

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Investments - Schedule of Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	$ 1,135,366	$ 1,083,980
Gross Unrealized Gains	14,683	22,394
Gross Unrealized Losses	(20,841)	(7,754)
Fair Value	1,129,208	1,098,620
Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	1,054,902	1,008,662
Gross Unrealized Gains	7,838	14,564
Gross Unrealized Losses	(19,489)	(7,128)
Fair Value	1,043,251	1,016,098
State and municipal
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	137,478	139,382
Gross Unrealized Gains	4,029	5,587
Gross Unrealized Losses	(1,782)	(603)
Fair Value	139,725	144,366
Residential mortgage-backed
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	186,279	160,379
Gross Unrealized Gains	509	723
Gross Unrealized Losses	(5,690)	(2,441)
Fair Value	181,098	158,661
Corporate
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	445,058	408,857
Gross Unrealized Gains	3,054	7,503
Gross Unrealized Losses	(8,486)	(2,639)
Fair Value	439,626	413,721
Commercial mortgage and asset-backed
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	192,941	182,595
Gross Unrealized Gains	173	714
Gross Unrealized Losses	(2,310)	(698)
Fair Value	190,804	182,611
Obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	7,804	35,948
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(29)	(101)
Fair Value	7,775	35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	83,317	79,476
Gross Unrealized Gains	73	37
Gross Unrealized Losses	(1,171)	(639)
Fair Value	82,219	78,874
Redeemable preferred stock
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	2,025	2,025
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(21)	(7)
Fair Value	2,004	2,018
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	80,464	75,318
Gross Unrealized Gains	6,845	7,830
Gross Unrealized Losses	(1,352)	(626)
Fair Value	$ 85,957	$ 82,522

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Investments - Schedule of Contract Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Cost or Amortized Cost
One year or less	$ 33,850
After one year through five years	327,069
After five years through ten years	185,400
After ten years	127,338
Residential mortgage-backed	186,279
Commercial mortgage and asset-backed	192,941
Redeemable preferred stock	2,025
Total	1,054,902	$ 1,008,662
Fair Value
One year or less	33,743
After one year through five years	323,368
After five years through ten years	181,026
After ten years	131,208
Residential mortgage-backed	181,098
Commercial mortgage and asset-backed	190,804
Redeemable preferred stock	2,004
Total	$ 1,043,251	$ 1,016,098

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Investments - Schedule of Gross Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 579,353	$ 319,654
Less Than 12 Months, Gross Unrealized Losses	(11,700)	(2,172)
12 Months or More, Fair Value	208,613	251,634
12 Months or More, Gross Unrealized Losses	(9,141)	(5,582)
Total, Fair Value	787,966	571,288
Total, Gross Unrealized Losses	(20,841)	(7,754)
Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	561,537	313,795
Less Than 12 Months, Gross Unrealized Losses	(10,889)	(2,107)
12 Months or More, Fair Value	202,928	245,969
12 Months or More, Gross Unrealized Losses	(8,600)	(5,021)
Total, Fair Value	764,465	559,764
Total, Gross Unrealized Losses	(19,489)	(7,128)
State and municipal
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	61,275	40,117
Less Than 12 Months, Gross Unrealized Losses	(1,325)	(318)
12 Months or More, Fair Value	10,454	10,662
12 Months or More, Gross Unrealized Losses	(457)	(285)
Total, Fair Value	71,729	50,779
Total, Gross Unrealized Losses	(1,782)	(603)
Residential mortgage-backed
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	90,188	50,447
Less Than 12 Months, Gross Unrealized Losses	(1,743)	(261)
12 Months or More, Fair Value	79,455	84,193
12 Months or More, Gross Unrealized Losses	(3,947)	(2,180)
Total, Fair Value	169,643	134,640
Total, Gross Unrealized Losses	(5,690)	(2,441)
Corporate
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	260,523	113,464
Less Than 12 Months, Gross Unrealized Losses	(5,309)	(846)
12 Months or More, Fair Value	64,506	66,954
12 Months or More, Gross Unrealized Losses	(3,177)	(1,793)
Total, Fair Value	325,029	180,418
Total, Gross Unrealized Losses	(8,486)	(2,639)
Commercial mortgage and asset-backed
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	94,429	53,965
Less Than 12 Months, Gross Unrealized Losses	(1,578)	(244)
12 Months or More, Fair Value	22,658	25,299
12 Months or More, Gross Unrealized Losses	(732)	(454)
Total, Fair Value	117,087	79,264
Total, Gross Unrealized Losses	(2,310)	(698)
Obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	0	3,024
Less Than 12 Months, Gross Unrealized Losses	0	(1)
12 Months or More, Fair Value	7,775	32,154
12 Months or More, Gross Unrealized Losses	(29)	(100)
Total, Fair Value	7,775	35,178
Total, Gross Unrealized Losses	(29)	(101)
U.S. Treasury securities and obligations guaranteed by the U.S. government
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	53,118	50,760
Less Than 12 Months, Gross Unrealized Losses	(913)	(430)
12 Months or More, Fair Value	18,080	26,707
12 Months or More, Gross Unrealized Losses	(258)	(209)
Total, Fair Value	71,198	77,467
Total, Gross Unrealized Losses	(1,171)	(639)
Redeemable preferred stock
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	2,004	2,018
Less Than 12 Months, Gross Unrealized Losses	(21)	(7)
12 Months or More, Fair Value	0	0
12 Months or More, Gross Unrealized Losses	0	0
Total, Fair Value	2,004	2,018
Total, Gross Unrealized Losses	(21)	(7)
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	17,816	5,859
Less Than 12 Months, Gross Unrealized Losses	(811)	(65)
12 Months or More, Fair Value	5,685	5,665
12 Months or More, Gross Unrealized Losses	(541)	(561)
Total, Fair Value	23,501	11,524
Total, Gross Unrealized Losses	$ (1,352)	$ (626)

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Investments - Summary of Realized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Net realized investment gains	$ (810)	$ 1,047
Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	22	338
Gross realized losses	(223)	(296)
Net realized investment gains	(201)	42
Bank loan participations
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	1,220	1,136
Gross realized losses	(100)	(539)
Net realized investment gains	1,120	597
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	0	409
Gross realized losses	(15)	0
Changes in fair values of equity securities	(1,710)	0
Net realized investment gains	(1,725)	409
Short-term investments and other
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	0	0
Gross realized losses	(4)	(1)
Net realized investment gains	$ (4)	$ (1)

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Investments - Summary of Private Debt and Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Net Investment Income [Line Items]
Net realized gain (loss) on changes in fair value of impaired bank loans	$ 3	$ 177
Total other invested assets	74,974		$ 70,208
Investment income	1,820	6,062
Renewable energy LLCs
Net Investment Income [Line Items]
Total other invested assets	32,592		32,063
Investment income	1,211	5,594
Renewable energy bridge financing notes
Net Investment Income [Line Items]
Total other invested assets	8,750		7,278
Investment income	$ 297	0
Rate of interest	15.00%
Interest income	$ 297
Limited partnerships
Net Investment Income [Line Items]
Total other invested assets	29,132		26,367
Investment income	226	382
Bank holding companies
Net Investment Income [Line Items]
Total other invested assets	4,500		$ 4,500
Investment income	86	86
Interest income	$ 86	86
Bank Holding Company
Net Investment Income [Line Items]
Rate of interest	7.60%
Interest income	$ 0	1
Investment in private subordinated notes	4,500
Corporate and other | Limited partnerships
Net Investment Income [Line Items]
Carrying values of limited partnerships held	2,900
Investment income (loss)	125	68
Corporate and other | Investment in LLC
Net Investment Income [Line Items]
Cash distributions from LLCs	1,200	1,600
Excess and Surplus Lines | Limited partnerships
Net Investment Income [Line Items]
Carrying values of limited partnerships held	26,300
Investment income (loss)	351	$ 314
Commitment to investment in limited partnership	$ 2,600
Minimum | Corporate and other | Investment in LLC
Net Investment Income [Line Items]
Ownership percentage	2.60%
Maximum | Corporate and other | Investment in LLC
Net Investment Income [Line Items]
Ownership percentage	32.80%

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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 11, 2007
Business Acquisition [Line Items]
Goodwill	$ 181,831	$ 181,831	$ 181,831
James River Group, Inc.
Business Acquisition [Line Items]
Percentage of outstanding shares				100.00%

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Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Acquired Intangible Assets [Line Items]
Identifiable intangibles not subject to amortization	$ 31,364	$ 31,364
Identifiable intangible assets subject to amortization
Gross Carrying Amount	11,611	11,611
Accumulated Amortization	4,790	4,641
Total Intangible Assets, Gross	42,975	42,975
Trademarks
Acquired Intangible Assets [Line Items]
Identifiable intangibles not subject to amortization	22,200	22,200
Insurance licenses and authorities
Acquired Intangible Assets [Line Items]
Identifiable intangibles not subject to amortization	9,164	9,164
Broker relationships
Identifiable intangible assets subject to amortization
Gross Carrying Amount	11,611	11,611
Accumulated Amortization	$ 4,790	$ 4,641
Life (Years)	24 years 7 months 6 days

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Earnings Per Share - Narrative (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock options and restricted share units ("RSU's")
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of securities excluded from the calculations of diluted earnings per share	192,817	97,755

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Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income to shareholders	$ 15,633	$ 18,450
Weighted average common shares outstanding:
Basic (in shares)	29,764,320	29,289,588
Common share equivalents (in shares)	428,983	1,037,835
Diluted (in shares)	30,193,303	30,327,423
Earnings per share:
Basic (in dollars per share)	$ 0.53	$ 0.63
Common share equivalents (in dollars per share)	(0.01)	(0.02)
Diluted (in dollars per share)	$ 0.52	$ 0.61

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Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Favorable development on prior year loss reserves
Reserve for losses and loss adjustment expenses	$ 2,610	$ 3,414
Excess and Surplus Lines | Prior accident years | From accident years 2016 and 2014
Favorable development on prior year loss reserves
Reserve for losses and loss adjustment expenses		3,200
Excess and Surplus Lines | Prior accident years | From the 2014-2016 accident years
Favorable development on prior year loss reserves
Reserve for losses and loss adjustment expenses	1,100
Specialty Admitted Insurance | Prior accident years | From accident years 2015, 2014 and prior accident years
Favorable development on prior year loss reserves
Reserve for losses and loss adjustment expenses		42
Specialty Admitted Insurance | Prior accident years | From the 2014-2016 accident years
Favorable development on prior year loss reserves
Reserve for losses and loss adjustment expenses	1,300
Casualty Reinsurance | Prior accident years
Favorable development on prior year loss reserves
Reserve for losses and loss adjustment expenses	$ 176	$ 145

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Reserve for Losses and Loss Adjustment Expenses - Reconciliation of Losses and Loss Adjustment Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract]
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at beginning of period	$ 989,825	$ 761,128
Add: Incurred losses and loss adjustment expenses net of reinsurance:
Current year	146,382	108,783
Prior years	(2,610)	(3,414)
Total incurred losses and loss and adjustment expenses	143,772	105,369
Deduct: Loss and loss adjustment expense payments net of reinsurance:
Current year	12,177	3,698
Prior years	83,117	71,018
Total loss and loss adjustment expense payments	95,294	74,716
Reserve for losses and loss adjustment expenses net of reinsurance recoverables at end of period	1,038,303	791,781
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	331,245	188,782	$ 302,524
Reserve for losses and loss adjustment expenses gross of reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	$ 1,369,548	$ 980,563	$ 1,292,349

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Other Comprehensive Income - Summary of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized (losses) gains arising during the period, before U.S. income taxes	$ (19,292)	$ 5,998
U.S. income taxes	544	(1,636)
Unrealized (losses) gains arising during the period, net of U.S. income taxes	(18,748)	4,362
Less reclassification adjustment:
Net realized investment (losses) gains	(201)	450
U.S. income tax expenses	0	(122)
Reclassification adjustment for investment (losses) gains realized in net income	(201)	328
Other comprehensive (loss) income	$ (18,547)	$ 4,034

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Contingent Liabilities - Narrative (Details) $ in Millions	Mar. 31, 2018 USD ($)
JRG Reinsurance Company, Ltd. | Letter of credit 100 Million
Contingent Liabilities [Line Items]
Letters of credit facility, amount	$ 100.0
Amount of letters of credit issued	52.2
Assets deposited for securing letters of credit	64.2
JRG Reinsurance Company, Ltd. | Letter of credit 102.5 Million
Contingent Liabilities [Line Items]
Letters of credit facility, amount	102.5
Amount of letters of credit issued	98.6
Assets deposited for securing letters of credit	125.9
JRG Reinsurance Company, Ltd. | Letter of credit 100 Million one
Contingent Liabilities [Line Items]
Letters of credit facility, amount	100.0
Amount of letters of credit issued	6.9
Assets deposited for securing letters of credit	10.0
James River Insurance Co
Contingent Liabilities [Line Items]
Total amount deposited in trust accounts	860.6
Third-party Reinsureds | JRG Reinsurance Company, Ltd.
Contingent Liabilities [Line Items]
Total amount deposited in trust accounts	$ 283.1

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Segment Information - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Fee income in Excess and Surplus Lines segment | $	$ 4.8	$ 3.8

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Segment Information - Summary of Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Gross written premiums	$ 298,116	$ 224,179
Net earned premiums	200,942	154,687
Underwriting profit (loss) of insurance segments	14,666	10,735
Net investment income	13,256	16,733
Interest expense	2,522	2,123
Segment revenues	218,344	176,402
Segment goodwill	181,831	181,831	$ 181,831
Segment assets	2,862,010	2,411,325	$ 2,756,695
Reportable segments | Excess and Surplus Lines
Segment Reporting Information [Line Items]
Gross written premiums	167,486	108,995
Net earned premiums	129,971	93,849
Underwriting profit (loss) of insurance segments	11,299	8,800
Net investment income	3,042	3,183
Interest expense	0	0
Segment revenues	137,327	101,090
Segment goodwill	181,831	181,831
Segment assets	909,963	749,617
Reportable segments | Specialty Admitted Insurance
Segment Reporting Information [Line Items]
Gross written premiums	87,401	72,464
Net earned premiums	13,340	16,253
Underwriting profit (loss) of insurance segments	1,623	842
Net investment income	711	636
Interest expense	0	0
Segment revenues	13,955	16,924
Segment goodwill	0	0
Segment assets	495,096	335,806
Reportable segments | Casualty Reinsurance
Segment Reporting Information [Line Items]
Gross written premiums	43,229	42,720
Net earned premiums	57,631	44,585
Underwriting profit (loss) of insurance segments	1,744	1,093
Net investment income	8,017	7,124
Interest expense	0	0
Segment revenues	65,526	52,146
Segment goodwill	0	0
Segment assets	1,368,872	1,211,896
Corporate and Other | Corporate and other
Segment Reporting Information [Line Items]
Gross written premiums	0	0
Net earned premiums	0	0
Underwriting profit (loss) of insurance segments	0	0
Net investment income	1,486	5,790
Interest expense	2,522	2,123
Segment revenues	1,536	6,242
Segment goodwill	0	0
Segment assets	$ 88,079	$ 114,006

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Segment Information - Reconciliation of Operating Segments by Individual Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total underwriting profit of insurance segments	$ 14,666	$ 10,735
Other operating expenses of the Corporate and Other segment	(7,431)	(6,461)
Underwriting profit	7,235	4,274
Net investment income	13,256	16,733
Net realized investment (losses) gains	(810)	1,047
Amortization of intangible assets	(149)	(149)
Other income and expenses	104	200
Interest expense	(2,522)	(2,123)
Income before taxes	17,114	19,982
Reportable segments | Excess and Surplus Lines
Segment Reporting Information [Line Items]
Total underwriting profit of insurance segments	11,299	8,800
Net investment income	3,042	3,183
Interest expense	0	0
Reportable segments | Specialty Admitted Insurance
Segment Reporting Information [Line Items]
Total underwriting profit of insurance segments	1,623	842
Net investment income	711	636
Interest expense	0	0
Reportable segments | Casualty Reinsurance
Segment Reporting Information [Line Items]
Total underwriting profit of insurance segments	1,744	1,093
Net investment income	8,017	7,124
Interest expense	$ 0	$ 0

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Other Operating Expenses and Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Operating Expenses And Other Expenses [Abstract]
Amortization of policy acquisition costs	$ 30,198	$ 27,638
Other underwriting expenses of the operating segments	17,154	14,794
Other operating expenses of the Corporate and Other segment	7,431	6,461
Total	$ 54,783	$ 48,893

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Fair Value Measurements - Narrative (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale securities	$ 1,129,208,000	$ 1,098,620,000
Impaired bank loan participations held for investment	1,700,000	5,100,000
Unpaid principal on bank loan participations for which external sources were unavailable to determine fair value		807,000
Carrying value of bank loan participations for which external sources were unavailable to determine fair value		$ 0
Market approach | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale securities	$ 4,700,000

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Fair Value Measurements - Summary of Assets Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 1,129,208	$ 1,098,620
Trading securities:
Fixed maturity securities	3,805	3,808
Short-term investments	26,235	36,804
Fixed maturity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	1,043,251	1,016,098
State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	139,725	144,366
Residential mortgage-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	181,098	158,661
Corporate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	439,626	413,721
Commercial mortgage and asset-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	190,804	182,611
Obligations of U.S. government corporations and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	7,775	35,847
U.S. Treasury securities and obligations guaranteed by the U.S. government
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	82,219	78,874
Redeemable preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	2,004	2,018
Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	85,957	82,522
Recurring basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	1,129,208	1,098,620
Trading securities:
Fixed maturity securities	3,805	3,808
Short-term investments	26,235	36,804
Recurring basis | Fixed maturity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	1,043,251	1,016,098
Recurring basis | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	139,725	144,366
Recurring basis | Residential mortgage-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	181,098	158,661
Recurring basis | Corporate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	439,626	413,721
Recurring basis | Commercial mortgage and asset-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	190,804	182,611
Recurring basis | Obligations of U.S. government corporations and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	7,775	35,847
Recurring basis | U.S. Treasury securities and obligations guaranteed by the U.S. government
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	82,219	78,874
Recurring basis | Redeemable preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	2,004	2,018
Recurring basis | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	85,957	82,522
Recurring basis | Preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	67,709	66,281
Recurring basis | Common stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	18,248	16,241
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	96,372	93,772
Trading securities:
Fixed maturity securities	0	0
Short-term investments	1,000	1,000
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Fixed maturity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	81,640	78,265
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Residential mortgage-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Corporate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Commercial mortgage and asset-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Obligations of U.S. government corporations and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | U.S. Treasury securities and obligations guaranteed by the U.S. government
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	81,640	78,265
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Redeemable preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14,732	15,507
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets Level 1 | Common stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14,732	15,507
Recurring basis | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	1,028,156	1,000,168
Trading securities:
Fixed maturity securities	3,805	3,808
Short-term investments	25,235	35,804
Recurring basis | Significant Other Observable Inputs Level 2 | Fixed maturity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	956,931	933,153
Recurring basis | Significant Other Observable Inputs Level 2 | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	139,725	144,366
Recurring basis | Significant Other Observable Inputs Level 2 | Residential mortgage-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	181,098	158,661
Recurring basis | Significant Other Observable Inputs Level 2 | Corporate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	439,626	413,721
Recurring basis | Significant Other Observable Inputs Level 2 | Commercial mortgage and asset-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	186,124	177,931
Recurring basis | Significant Other Observable Inputs Level 2 | Obligations of U.S. government corporations and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	7,775	35,847
Recurring basis | Significant Other Observable Inputs Level 2 | U.S. Treasury securities and obligations guaranteed by the U.S. government
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	579	609
Recurring basis | Significant Other Observable Inputs Level 2 | Redeemable preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	2,004	2,018
Recurring basis | Significant Other Observable Inputs Level 2 | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	71,225	67,015
Recurring basis | Significant Other Observable Inputs Level 2 | Preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	67,709	66,281
Recurring basis | Significant Other Observable Inputs Level 2 | Common stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	3,516	734
Recurring basis | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	4,680	4,680
Trading securities:
Fixed maturity securities	0	0
Short-term investments	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Fixed maturity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	4,680	4,680
Recurring basis | Significant Unobservable Inputs Level 3 | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Residential mortgage-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Corporate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Commercial mortgage and asset-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	4,680	4,680
Recurring basis | Significant Unobservable Inputs Level 3 | Obligations of U.S. government corporations and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | U.S. Treasury securities and obligations guaranteed by the U.S. government
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Redeemable preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	0
Recurring basis | Significant Unobservable Inputs Level 3 | Common stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 0	$ 0

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Fair Value Measurements - Summary of Assets Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank loan participations held-for-investment	$ 1,700	$ 5,100
Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank loan participations held-for-investment	1,741	5,111
Nonrecurring basis | Quoted Prices in Active Markets for Identical Assets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank loan participations held-for-investment	0	0
Nonrecurring basis | Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank loan participations held-for-investment	0	0
Nonrecurring basis | Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank loan participations held-for-investment	$ 1,741	$ 5,111

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Fair Value Measurements - Summary of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Available-for-sale:
Fixed maturity securities	$ 1,043,251	$ 1,016,098
Equity securities	85,957	82,522
Trading:
Bank loan participations held-for-investment, at amortized cost, net of allowance	257,426	238,214
Cash and cash equivalents	151,046	163,495	$ 94,224	$ 109,784
Short-term investments	26,235	36,804
Liabilities
Senior debt	98,300	98,300
Junior subordinated debt	104,055	104,055
Carrying Value
Available-for-sale:
Fixed maturity securities	1,043,251	1,016,098
Equity securities	85,957	82,522
Trading:
Fixed maturity securities	3,805	3,808
Bank loan participations held-for-investment, at amortized cost, net of allowance	257,426	238,214
Cash and cash equivalents	151,046	163,495
Short-term investments	26,235	36,804
Other invested assets – notes receivable	13,250	11,778
Liabilities
Senior debt	98,300	98,300
Junior subordinated debt	104,055	104,055
Fair Value
Available-for-sale:
Fixed maturity securities	1,043,251	1,016,098
Equity securities	85,957	82,522
Trading:
Fixed maturity securities	3,805	3,808
Bank loan participations held-for-investment, at amortized cost, net of allowance	257,840	236,532
Cash and cash equivalents	151,046	163,495
Short-term investments	26,235	36,804
Other invested assets – notes receivable	19,056	17,104
Liabilities
Senior debt	98,871	97,884
Junior subordinated debt	$ 118,752	$ 116,569

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Capital Stock and Equity Awards - Commons Shares (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding	29,866,705	29,696,682
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares issued during period	170,023
Common stock, shares outstanding	29,866,705	29,696,682	29,344,327	29,257,566
Options | Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares issued during period	127,196
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock unit dividend equivalents	$ 99		$ 77
Dividends payable	$ 409	$ 434
RSUs | Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares issued during period	42,827

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Capital Stock and Equity Awards - Schedule of Dividends (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended
	Mar. 30, 2018	Feb. 22, 2018	Mar. 31, 2017	Feb. 14, 2017	Mar. 31, 2018	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Dividend declared per share (in dollars per share)		$ 0.30		$ 0.30	$ 0.30	$ 0.30
Total Amount	$ 9.0		$ 8.9

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Capital Stock and Equity Awards - Equity Incentive Plans (Details)	Mar. 31, 2018 shares
2014 LTIP | Non-qualified stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available for issuance	4,171,150
Number of shares available for grant	1,658,715
2014 Director Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available for issuance	50,000
Number of shares available for grant	21,663

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Capital Stock and Equity Awards - Summary of Option Activity (Details) - Options - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Shares
Beginning of period (in shares)	1,479,236	2,234,699
Granted (in shares)	0	195,509
Exercised (in shares)	(142,129)	(97,211)
Forfeited (in shares)	0	(50,062)
End of period (in shares)	1,337,107	2,282,935
Exercisable, end of period (in shares)	983,508	1,334,756
Weighted- Average Exercise Price
Beginning of period (in dollars per share)	$ 27.81	$ 22.84
Granted (in dollars per share)	0.00	42.17
Exercised (in dollars per share)	20.14	17.23
Forfeited (in dollars per share)	0.00	27.97
End of period (in dollars per share)	28.63	24.62
Exercisable, end of period (in dollars per share)	$ 26.06	$ 20.47
Vesting period (in years)	7 years
Minimum
Weighted- Average Exercise Price
Vesting period (in years)	3 years
Maximum
Weighted- Average Exercise Price
Vesting period (in years)	4 years

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Capital Stock and Equity Awards - Summary of RSU Activity (Details) - RSUs - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Shares
Unvested, beginning of period (in shares)	178,882	196,800
Granted (in shares)	214,907	117,879
Vested (in shares)	(62,714)	(37,485)
Forfeited (in shares)	0	(19,743)
Unvested, end of period (in shares)	331,075	257,451
Shares
Unvested, beginning of period (in dollars per share)	$ 37.93	$ 24.38
Granted (in dollars per share)	39.81	42.17
Vested (in dollars per share)	40.90	32.07
Forfeited (in dollars per share)	0.00	24.06
Unvested, end of period (in dollars per share)	$ 38.59	$ 31.43
Vesting period (in years)	3 years
Non-employee directors
Shares
Vesting period (in years)	1 year
Minimum
Shares
Vesting period (in years)	1 year
Maximum
Shares
Vesting period (in years)	5 years

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Capital Stock and Equity Awards - Summary of Share Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Share based compensation expense	$ 1,455	$ 1,794
U.S. tax benefit on share based compensation expense	$ 173	$ 469

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Capital Stock and Equity Awards - Compensation Expense (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Equity [Abstract]
Unrecognized share based compensation expense	$ 14.0
Weighted-average period of unrecognized share based compensation expense (in years)	2 years 3 months 18 days
Weighted-average remaining contractual life of options outstanding (in years)	4 years 4 months 24 days
Weighted-average remaining contractual life of options exercisable (in years)	4 years

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Subsequent Events (Details) - Subsequent event - $ / shares	Jun. 29, 2018	Jun. 11, 2018	May 01, 2018
Subsequent Event [Line Items]
Dividends payable, date declared			May 01, 2018
Cash dividend declared (in dollars per share)			$ 0.30
Dividends payable, date to be paid	Jun. 29, 2018
Dividend payable, record date		Jun. 11, 2018