10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

R  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE

ACT OF 1934

For the Quarterly Period Ended June 30, 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: 001-33245

EMPLOYERS HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Nevada (State or other jurisdiction of incorporation or organization)	04-3850065 (I.R.S. Employer Identification Number)
10375 Professional Circle, Reno, Nevada  89521 (Address of principal executive offices and zip code)

(888) 682-6671

(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 R No o

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 (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes R No o

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

Large accelerated filer R	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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No R

Class	July 19, 2018
Common Stock, $0.01 par value per share	32,759,375 shares outstanding

		Page No.
PART 1 – FINANCIAL INFORMATION
Item 1	Consolidated Financial Statements
	Consolidated Balance Sheets as of June 30, 2018 (Unaudited) and December 31, 2017	3
	Consolidated Statements of Comprehensive Income for the Three and Six Months Ended June 30, 2018 and 2017 (Unaudited)	4
	Consolidated Statements of Stockholders' Equity for the Six Months Ended June 30, 2018 and 2017 (Unaudited)	5
	Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2018 and 2017 (Unaudited)	6
	Notes to Consolidated Financial Statements (Unaudited)	8
Item 2	Management’s Discussion and Analysis of Consolidated Financial Condition and Results of Operations	20
Item 3	Quantitative and Qualitative Disclosures About Market Risk	30
Item 4	Controls and Procedures	30
	PART II – OTHER INFORMATION
Item 1	Legal Proceedings	31
Item 1A	Risk Factors	31
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	31
Item 3	Defaults Upon Senior Securities	31
Item 4	Mine Safety Disclosures	31
Item 5	Other Information	31
Item 6	Exhibits	32
Signatures		33

2

PART I – FINANCIAL INFORMATION

Item 1.  Consolidated Financial Statements

Employers Holdings, Inc. and Subsidiaries
Consolidated Balance Sheets
(in millions, except share data)
	As of			As of
	June 30, 2018			December 31, 2017
Assets	(unaudited)
Investments:
Fixed maturity securities at fair value (amortized cost $2,418.0 at June 30, 2018 and $2,421.0 at December 31, 2017)	$	2,401.2		$	2,463.4
Equity securities at fair value (cost $113.5 at June 30, 2018 and $116.7 at December 31, 2017)	197.7			210.3
Equity securities at cost	6.4			—
Short-term investments at fair value (amortized cost $4.0 at December 31, 2017)	—			4.0
Total investments	2,605.3			2,677.7
Cash and cash equivalents	146.3			73.3
Restricted cash and cash equivalents	1.0			1.0
Accrued investment income	18.6			19.6
Premiums receivable (less bad debt allowance of $7.5 at June 30, 2018 and $10.0 at December 31, 2017)	355.6			326.7
Reinsurance recoverable for:
Paid losses	7.6			7.2
Unpaid losses	512.5			537.0
Deferred policy acquisition costs	51.7			45.8
Deferred income taxes, net	24.4			28.7
Property and equipment, net	20.3			13.9
Intangible assets, net	7.8			7.9
Goodwill	36.2			36.2
Contingent commission receivable—LPT Agreement	32.0			31.4
Other assets	49.2			33.7
Total assets	$	3,868.5		$	3,840.1
Liabilities and stockholders’ equity
Claims and policy liabilities:
Unpaid losses and loss adjustment expenses	$	2,227.9		$	2,266.1
Unearned premiums	360.2			318.3
Total claims and policy liabilities	2,588.1			2,584.4
Commissions and premium taxes payable	58.9			55.3
Accounts payable and accrued expenses	23.4			23.7
Deferred reinsurance gain—LPT Agreement	154.7			163.6
Notes payable	20.0			20.0
Other liabilities	66.9			45.4
Total liabilities	$	2,912.0		$	2,892.4
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value; 150,000,000 shares authorized; 56,866,727 and 56,695,174 shares issued and 32,759,575 and 32,597,819 shares outstanding at June 30, 2018 and December 31, 2017, respectively	$	0.6		$	0.6
Preferred stock, $0.01 par value; 25,000,000 shares authorized; none issued	—			—
Additional paid-in capital	382.4			381.2
Retained earnings	970.8			842.2
Accumulated other comprehensive (loss) income, net of tax	(13.3		)	107.4
Treasury stock, at cost (24,107,152 shares at June 30, 2018 and 24,097,355 shares at December 31, 2017)	(384.0		)	(383.7		)
Total stockholders’ equity	956.5			947.7
Total liabilities and stockholders’ equity	$	3,868.5		$	3,840.1

See accompanying unaudited notes to the consolidated financial statements.

3

Employers Holdings, Inc. and Subsidiaries
Consolidated Statements of Comprehensive Income
(in millions, except per share data)
	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Revenues	(unaudited)						(unaudited)
Net premiums earned	$	178.0		$	171.7		$	354.6		$	347.1
Net investment income	20.3			18.2			39.7			36.9
Net realized and unrealized gains (losses) on investments	5.7			1.1			(2.4		)	3.3
Gain on redemption of notes payable	—			2.1			—			2.1
Other income	0.1			0.1			0.1			0.1
Total revenues	204.1			193.2			392.0			389.5
Expenses
Losses and loss adjustment expenses	87.8			106.1			183.2			215.0
Commission expense	24.5			21.5			48.2			43.0
Underwriting and other operating expenses	40.1			32.6			79.2			68.6
Interest and financing expenses	0.4			0.4			0.7			0.8
Total expenses	152.8			160.6			311.3			327.4
Net income before income taxes	51.3			32.6			80.7			62.1
Income tax expense	8.8			7.8			12.6			14.1
Net income	$	42.5		$	24.8		$	68.1		$	48.0
Comprehensive income
Unrealized AFS investment (losses) gains arising during the period (net of taxes of $(3.0) and $4.5 for the three months ended June 30, 2018 and 2017, respectively, and $(12.6) and $9.7 for the six months ended June 30, 2018 and 2017, respectively)	$	(11.3	)	$	8.4		$	(47.1	)	$	17.9
Reclassification adjustment for realized AFS investment losses (gains) in net income (net of taxes of $(0.4) for the three months ended June 30, 2017, and $0.1 and $(1.2) for the six months ended June 30, 2018 and 2017, respectively)	—			(0.7		)	0.4			(2.1		)
Other comprehensive (loss) income, net of tax	(11.3		)	7.7			(46.7		)	15.8
Total comprehensive income	$	31.2		$	32.5		$	21.4		$	63.8
Net realized and unrealized gains (losses) on investments
Net realized and unrealized gains (losses) on investments before impairments	$	5.7		$	1.1		$	(0.4	)	$	3.5
Other than temporary impairment recognized in earnings	—			—			(2.0		)	(0.2		)
Net realized and unrealized gains (losses) on investments	$	5.7		$	1.1		$	(2.4	)	$	3.3
Earnings per common share (Note 12):
Basic	$	1.29		$	0.76		$	2.07		$	1.48
Diluted	$	1.28		$	0.75		$	2.05		$	1.46
Cash dividends declared per common share and eligible RSUs and PSUs	$	0.20		$	0.15		$	0.40		$	0.30

See accompanying unaudited notes to the consolidated financial statements.

4

Employers Holdings, Inc. and Subsidiaries
Consolidated Statements of Stockholders' Equity
For the Six Months Ended June 30, 2018 and 2017
(Unaudited)
	Common Stock			Additional Paid-In Capital			Retained Earnings			Accumulated Other Comprehensive Income, Net			Treasury Stock at Cost			Total Stockholders' Equity
	Shares Issued	Amount
	(in millions, except share data)
Balance, January 1, 2018	56,695,174	$	0.6	$	381.2		$	842.2		$	107.4		$	(383.7	)	$	947.7
Stock-based obligations	—	—		3.9			—			—			—			3.9
Stock options exercised	13,800	—		0.2			—			—			—			0.2
Vesting of RSUs and PSUs, net of shares withheld to satisfy tax withholdings	157,753	—		(2.9		)	—			—			—			(2.9		)
Acquisition of common stock	—	—		—			—			—			(0.3		)	(0.3		)
Dividends declared	—	—		—			(13.3		)	—			—			(13.3		)
Net income for the period		—		—			68.1			—			—			68.1
Reclassification adjustment for adoption of ASU No. 2016-01	—	—		—			74.0			(74.0		)	—			—
Change in net unrealized losses on investments, net of taxes of $12.5		—		—			—			(46.7		)	—			(46.7		)
Balance, June 30, 2018	56,866,727	$	0.6	$	382.4		$	970.8		$	(13.3	)	$	(384.0	)	$	956.5
Balance, January 1, 2017	56,226,277	$	0.6	$	372.0		$	777.2		$	74.5		$	(383.7	)	$	840.6
Stock-based obligations	—	—		3.2			—			—			—			3.2
Stock options exercised	167,026	—		3.3			—			—			—			3.3
Vesting of RSUs and PSUs, net of shares withheld to satisfy tax withholdings	117,049	—		(1.9		)	—			—			—			(1.9		)
Dividends declared	—	—		—			(9.8		)	—			—			(9.8		)
Net income for the period		—		—			48.0			—			—			48.0
Change in net unrealized gains on investments, net of taxes of $8.5		—		—			—			15.8			—			15.8
Balance, June 30, 2017	56,510,352	$	0.6	$	376.6		$	815.4		$	90.3		$	(383.7	)	$	899.2

See accompanying unaudited notes to the consolidated financial statements.

5

Employers Holdings, Inc. and Subsidiaries
Consolidated Statements of Cash Flows
(in millions)
	Six Months Ended
	June 30,
	2018			2017
Operating activities	(unaudited)
Net income	$	68.1		$	48.0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3.8			4.2
Stock-based compensation	3.8			3.1
Amortization of premium on investments, net	4.4			7.5
Allowance for doubtful accounts	(2.5		)	0.1
Deferred income tax (benefit) expense	16.8			6.0
Net realized and unrealized losses (gains) on investments	2.4			(3.3		)
Gain on redemption of notes payable	—			(2.1		)
Change in operating assets and liabilities:
Premiums receivable	(26.5		)	(28.5		)
Reinsurance recoverable on paid and unpaid losses	24.1			20.5
Current federal income taxes	(7.1		)	(6.9		)
Unpaid losses and loss adjustment expenses	(38.2		)	(16.1		)
Unearned premiums	41.9			30.8
Accounts payable, accrued expenses and other liabilities	4.0			(7.1		)
Deferred reinsurance gain—LPT Agreement	(8.9		)	(6.0		)
Other	0.1			(7.6		)
Net cash provided by operating activities	86.2			42.6
Investing activities
Purchases of fixed maturity securities	(358.1		)	(202.1		)
Purchases of equity securities	(19.9		)	(10.7		)
Purchases of short-term investments	(34.9		)	(8.1		)
Proceeds from sale of fixed maturity securities	168.4			43.0
Proceeds from sale of equity securities	24.0			11.4
Proceeds from maturities and redemptions of fixed maturity securities	187.7			96.8
Proceeds from maturities of short-term investments	38.9			18.6
Net change in unsettled investment purchases and sales	7.2			5.0
Capital expenditures and other	(10.1		)	(5.9		)
Net cash provided by (used in) investing activities	3.2			(52.0		)
Financing activities
Acquisition of common stock	(0.3		)	—
Cash transactions related to stock-based compensation	(2.7		)	1.4
Dividends paid to stockholders	(13.3		)	(9.8		)
Redemption of notes payable	—			(9.9		)
Payments on capital leases	(0.1		)	(0.1		)
Net cash used in financing activities	(16.4		)	(18.4		)
Net increase (decrease) in cash, cash equivalents and restricted cash	73.0			(27.8		)
Cash, cash equivalents and restricted cash at the beginning of the period	74.3			70.8
Cash, cash equivalents and restricted cash at the end of the period	$	147.3		$	43.0

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The following table presents our cash, cash equivalents and restricted cash by category within the Consolidated Balance Sheets:

	As of		As of
	June 30, 2018		December 31, 2017
	(in millions)
Cash and cash equivalents	$	146.3	$	73.3
Restricted cash and cash equivalents supporting reinsurance obligations	1.0		1.0
Total cash, cash equivalents and restricted cash	$	147.3	$	74.3

See accompanying unaudited notes to the consolidated financial statements.

7

Employers Holdings, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Unaudited)

1. Basis of Presentation and Summary of Operations

Employers Holdings, Inc. (EHI) is a Nevada holding company. Through its wholly owned insurance subsidiaries, Employers Insurance Company of Nevada (EICN), Employers Compensation Insurance Company (ECIC), Employers Preferred Insurance Company (EPIC), and Employers Assurance Company (EAC), EHI is engaged in the commercial property and casualty insurance industry, specializing in workers' compensation products and services. Unless otherwise indicated, all references to the “Company” refer to EHI, together with its subsidiaries.

In 1999, the Nevada State Industrial Insurance System (the Fund) entered into a retroactive 100% quota share reinsurance agreement (the LPT Agreement) through a loss portfolio transfer transaction with third party reinsurers. The LPT Agreement commenced on June 30, 1999 and will remain in effect until all claims under the covered policies have closed, the LPT Agreement is commuted or terminated, upon the mutual agreement of the parties, or the reinsurers' aggregate maximum limit of liability is exhausted, whichever occurs first. The LPT Agreement does not provide for any additional termination terms. On January 1, 2000, EICN assumed all of the assets, liabilities and operations of the Fund, including the Fund's rights and obligations associated with the LPT Agreement (See Note 8).

The Company accounts for the LPT Agreement as retroactive reinsurance. Upon entry into the LPT Agreement, an initial deferred reinsurance gain (the Deferred Gain) was recorded as a liability on the Company’s Consolidated Balance Sheets. The Company is entitled to receive a contingent profit commission under the LPT Agreement. The contingent profit commission is estimated based on both actual paid results to date and projections of expected paid losses under the LPT Agreement and is recorded as an asset on the Company's Consolidated Balance Sheets.

The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal, recurring adjustments) necessary for a fair presentation of the Company’s consolidated financial position and results of operations for the periods presented have been included. The results of operations for an interim period are not necessarily indicative of the results for an entire year. These financial statements have been prepared consistent with the accounting policies described in the Company’s Form 10-K for the year ended December 31, 2017 (Annual Report).

The Company operates as a single operating segment, workers' compensation insurance, through its wholly owned subsidiaries. The Company considers an operating segment to be any component of its business whose operating results are regularly reviewed by the Company’s chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance based on discrete financial information.

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. As a result, actual results could differ from these estimates. The most significant areas that require management judgment are the estimate of unpaid losses and loss adjustment expenses (LAE), evaluation of reinsurance recoverables, recognition of premium revenue, recoverability of deferred income taxes, and valuation of investments.

Reclassifications

Certain prior period information has been reclassified to conform to the current period presentation.

Pending Acquisition

On August 11, 2017, the Company entered into, and on May 23, 2018, the Company amended, a stock purchase agreement (Purchase Agreement) with Partner Reinsurance Company of the U.S. (PRUS) with respect to the acquisition (Acquisition) of all of the outstanding shares of capital stock of PartnerRe Insurance Company of New York (PRNY). The purchase price is equal to the sum of: (i) the amount of statutory capital and surplus of PRNY at closing (which is currently estimated to be approximately $40.0 million); and (ii) $5.8 million. The Company expects to fund the Acquisition with cash on hand.

Pursuant to the Purchase Agreement, all liabilities and obligations of PRNY existing as of the closing date, whether known or unknown, will be indemnified by PRUS. In addition, PartnerRe Ltd., the parent company of PRUS, has provided the Company

8

with a Guaranty that unconditionally, absolutely and irrevocably guarantees the full and prompt payment and performance by PRUS of all of its obligations, liabilities, and indemnities under the Purchase Agreement and the transactions contemplated thereby.

The Company will not be acquiring any employees or ongoing business operations pursuant to the Acquisition. The Acquisition is subject to certain closing conditions, including, among other things, approval from the Department of Financial Services of the State of New York.

2. Change in Estimates

The Company reduced its estimated loss and LAE reserves ceded under the Loss Portfolio Transfer Agreement (LPT Reserve Adjustment) as a result of the determination that an adjustment was necessary to reflect observed favorable paid loss trends during the second quarter of 2018. The following table shows the financial statement impact related to the LPT Reserve Adjustment.

	Three Months Ended			Six Months Ended
	June 30, 2018			June 30, 2018
	(in millions, except per share data)
LPT Reserve Adjustment	$	(6.3	)	$	(6.3	)
Cumulative adjustment to the Deferred Gain(1)	(2.2		)	(2.2		)
Net income impact from this change in estimate	2.2			2.2
Earnings per common share impact from this change in estimate:
Basic and Diluted	0.07			0.07

(1) The cumulative adjustment to the Deferred reinsurance gain–LPT Agreement (Deferred Gain) was also recognized in losses and LAE incurred in the Company's Consolidated Statement of Comprehensive Income, so that the Deferred Gain reflects the balance that would have existed had the revised loss and LAE reserves been recognized at the inception of the LPT Agreement.

The Company increased its estimate of Contingent commission receivable – LPT Agreement (LPT Contingent Commission Adjustment) as a result of the determination that an adjustment was necessary to reflect observed favorable paid loss trends during the second quarter of 2018. The following table shows the financial statement impact related to the LPT Contingent Commission Adjustment.

	Three Months Ended		Six Months Ended
	June 30, 2018		June 30, 2018
	(in millions, except per share data)
LPT Contingent Commission Adjustment	$	0.5	$	0.5
Net income impact from this change in estimate	0.5		0.5
Earnings per common share impact from this change in estimate:
Basic and Diluted	0.02		0.02

3. New Accounting Standards

Recently Issued Accounting Standards

In February 2016, the FASB issued ASU Number 2016-02, Leases (Topic 842). This update provides guidance on a new lease model that includes the recognition of assets and liabilities arising from lease transactions on the balance sheet. Additionally, the update provides clarity on the definition of a lease and the distinction between finance and operating leases. Furthermore, the update requires certain qualitative and quantitative disclosures pertaining to the amounts recorded in the financial statements. This update becomes effective for annual reporting periods, including interim periods within those annual periods, beginning after December 15, 2018 and early adoption is permitted. The Company has determined that the impact of this new standard will be equal to the present value of the Company's lease obligations under various non-cancellable operating lease contracts, which amounted to approximately $23.0 million at June 30, 2018, and will be recognized as lease assets and liabilities on the Company's Balance Sheets upon adoption.

Recently Adopted Accounting Standards

In March 2018, the FASB issued ASU Number 2018-05, Income Taxes (Topic 740). This update provides guidance regarding the application of ASC Topic 740 for the income tax effects of the Tax Cuts and Jobs Act. This update allowed companies to report provisional amounts of the effects of the Tax Cuts and Jobs Act in their financial statements in the first reporting period they are able to determine a reasonable estimate and any adjustments to provisional amounts should be included in income from continuing operations as an adjustment to tax expense or benefit in the reporting period the amounts are determined. The Company adopted this update in the fourth quarter of 2017 and included an estimate of the income tax effects in its financial statements for the year

9

ended December 31, 2017. The Company does not expect the amounts of any future income tax adjustments related to the effects of the Tax Cuts and Jobs Act to be material.

In January 2016, the FASB issued ASU Number 2016-01,Financial Instruments - Overall (Subtopic 825-10). This update replaces the guidance to classify equity securities with readily determinable fair values into different categories (trading or available-for-sale) and requires those equity securities to be measured at fair value with changes in fair value recognized through net income. Additionally, this update eliminates the disclosure of the method and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost. It requires financial instruments to be measured at fair value using the exit price notion. Furthermore, this update clarifies that an evaluation of deferred tax assets related to available-for-sale securities is needed, in combination with an evaluation of other deferred tax assets, to determine if a valuation allowance is required.

This update did not apply to the Company’s investment in Federal Home Loan Bank (FHLB) stock. Rather, it specified that FHLB stock shall be carried at cost and evaluated periodically for impairment; furthermore, it specified that, beginning January 1, 2018, FHLB stock shall not be shown with securities accounted for under ASC 321, which provides detailed guidance on, among other things, accounting and reporting of investments in equity securities that have readily determinable fair values. As a result, the Company’s investment in FHLB stock is presented within Equity securities at cost on the Company's Consolidated Balance Sheet at March 31, 2018. In all periods prior to January 1, 2018, the Company's investment in FHLB stock is presented within Equity securities at fair value on the Company's Consolidated Balance Sheets.

This update became effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company adopted this update effective January 1, 2018. Adoption of this accounting standard resulted in a $74.0 million reclassification adjustment, net of tax, from accumulated other comprehensive income to retained earnings.

4. Fair Value of Financial Instruments

The carrying value and the estimated fair value of the Company’s financial instruments at fair value were as follows:

	June 30, 2018				December 31, 2017
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
	(in millions)
Financial assets
Total investments at fair value	$	2,598.9	$	2,598.9	$	2,677.7	$	2,677.7
Cash and cash equivalents	146.3		146.3		73.3		73.3
Restricted cash and cash equivalents	1.0		1.0		1.0		1.0
Financial liabilities
Notes payable	$	20.0	$	23.5	$	20.0	$	23.6

Assets and liabilities recorded at fair value on the Company's Consolidated Balance Sheets are categorized based upon the levels of judgment associated with the inputs used to measure their fair value. Level inputs are defined as follows:

• Level 1 - Inputs are unadjusted quoted market prices for identical assets or liabilities in active markets at the measurement date.

• Level 2 - Inputs other than Level 1 prices that are observable for similar assets or liabilities through corroboration with market data at the measurement date.

• Level 3 - Inputs that are unobservable that reflect management's best estimate of what willing market participants would use in pricing the assets or liabilities at the measurement date.

The Company uses third party pricing services to assist it with its investment accounting function. The ultimate pricing source varies depending on the investment security and pricing service used, but investment securities valued on the basis of observable inputs (Levels 1 and 2) are generally assigned values on the basis of actual transactions. Securities valued on the basis of pricing models with significant unobservable inputs or non-binding broker quotes are classified as Level 3. The Company performs quarterly analyses on the prices it receives from third parties to determine whether the prices are reasonable estimates of fair value, including confirming the fair values of these securities through observable market prices using an alternative pricing source, as it is ultimately management’s responsibility to ensure that the fair values reflected in the Company’s consolidated financial statements are appropriate. If differences are noted in these analyses, the Company may obtain additional information from other pricing services to validate the quoted price.

The Company bases all of its estimates of fair value for assets on the bid prices, when available, as they represent what a third-party market participant would be willing to pay in an arm's length transaction.

For securities not actively traded, third party pricing services may use quoted market prices of similar instruments or discounted cash flow analyses, incorporating inputs that are currently observable in the markets for similar securities. Inputs that are often

10

used in the valuation methodologies include, but are not limited to, broker quotes, benchmark yields, credit spreads, default rates, and prepayment speed assumptions. There were no material adjustments made to the prices obtained from third party pricing services as of June 30, 2018 and December 31, 2017.

These methods of valuation only produce an estimate of fair value if there is objectively verifiable information to produce a valuation. When objectively verifiable information is not available, the Company produces an estimate of fair value using some of the same methodologies, making assumptions for market-based inputs that are unavailable.

The Company's estimates of fair value for its notes payable are based on a combination of the variable interest rates for notes with similar durations to discount the projection of future payments on notes payable. The fair value measurements for notes payable have been determined to be Level 2 at each of the periods presented.

Each of the Company's insurance operating subsidiaries is a member of the FHLB of San Francisco. Members are required to purchase stock in FHLB in addition to maintaining collateral deposits that back any funds advanced. The Company's investment in FHLB stock is recorded at cost, as purchases and sales of these securities are at par value with the issuer. FHLB stock is considered a restricted security and is periodically evaluated by the Company for impairment based on the ultimate recovery of par value. 

The following table presents the Company's investments at fair value and the corresponding fair value measurements.

	June 30, 2018						December 31, 2017
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
	(in millions)
Fixed maturity securities:
U.S. Treasuries	$	—	$	119.4	$	—	$	—	$	137.0	$	—
U.S. Agencies	—		11.5		—		—		11.8		—
States and municipalities	—		568.7		—		—		642.5		—
Corporate securities	—		1,079.5		—		—		1,118.0		—
Residential mortgage-backed securities	—		433.1		—		—		389.3		—
Commercial mortgage-backed securities	—		104.0		—		—		106.0		—
Asset-backed securities	—		67.3		—		—		58.8		—
Other securities	—		17.7		—		—		—		—
Total fixed maturity securities	$	—	$	2,401.2	$	—	$	—	$	2,463.4	$	—
Equity securities at fair value:
Industrial and miscellaneous	$	172.6	$	—	$	—	$	181.7	$	—	$	—
Non-redeemable preferred stock (FHLB)	—		—		—		—		—		4.7
Other	25.1		—		—		23.9		—		—
Total equity securities at fair value	197.7		—		—		205.6		—		4.7
Short-term investments	—		—		—		—		4.0		—
Total investments at fair value	$	197.7	$	2,401.2	$	—	$	205.6	$	2,467.4	$	4.7

Certain cash equivalents, principally money market securities, are measured at fair value using the net asset value (NAV) per share. The following table presents cash equivalents at NAV and total cash and cash equivalents carried at fair value on the Company's Consolidated Balance Sheets.

	June 30, 2018		December 31, 2017
	(in millions)
Cash and cash equivalents at fair value	$	61.3	$	34.3
Cash equivalents measured at NAV, which approximates fair value	85.0		39.0
Total cash and cash equivalents	$	146.3	$	73.3

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The following table provides a reconciliation of the beginning and ending balances of investments that are recorded at fair value and are measured using Level 3 inputs for the six months ended June 30, 2018 and 2017.

	Level 3 Securities
	2018			2017
	(in millions)
Beginning balance, January 1	$	4.7		$	11.9
Transfers out of Level 3 (1)	(4.7		)	(7.0		)
Purchases and sales, net	—			(0.2		)
Ending balance, June 30	$	—		$	4.7

(1) The transfer during the six months ended June 30, 2018 was the result of adoption of ASU 2016-01, which specified that FHLB stock shall be carried at cost and is no longer measured at fair value. Transfers during the six months ended June 30, 2017 were from Level 3 to Level 2 as observable market data became available for these securities.

5. Investments

The Company's investments in fixed maturity securities, equity securities at fair value (prior to 2018), and short-term investments are classified as available-for-sale (AFS) that are reported at fair value with unrealized gains and losses excluded from earnings and reported as a separate component of stockholders' equity, net of deferred taxes, in Accumulated other comprehensive (loss) income (AOCI) on the Company’s Consolidated Balance Sheets. Beginning in 2018, with the adoption of ASU 2016-01, the Company's investments in equity securities at fair value are no longer classified as AFS and changes in fair value are included in Net realized and unrealized (losses) gains on investments on the Company's Consolidated Statements of Comprehensive Income. Effective January 1, 2018, the Company's investment in FHLB stock is presented within Equity securities at cost on the Company's Consolidated Balance Sheets. Other securities within fixed maturity securities consist of bank loans, which are classified as AFS and are reported at fair value.

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The cost or amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the Company’s AFS investments were as follows:

	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in millions)
At June 30, 2018
Fixed maturity securities
U.S. Treasuries	$	120.4	$	0.9	$	(1.9	)	$	119.4
U.S. Agencies	11.3		0.3		(0.1		)	11.5
States and municipalities	555.0		14.9		(1.2		)	568.7
Corporate securities	1,095.9		6.5		(22.9		)	1,079.5
Residential mortgage-backed securities	442.9		2.0		(11.8		)	433.1
Commercial mortgage-backed securities	107.1		—		(3.1		)	104.0
Asset-backed securities	67.6		0.2		(0.5		)	67.3
Other securities	17.8		—		(0.1		)	17.7
Total fixed maturity securities	2,418.0		24.8		(41.6		)	2,401.2
Total AFS investments	$	2,418.0	$	24.8	$	(41.6	)	$	2,401.2

At December 31, 2017
Fixed maturity securities
U.S. Treasuries	$	135.8	$	2.0	$	(0.8	)	$	137.0
U.S. Agencies	11.3		0.5		—			11.8
States and municipalities	617.0		25.5		—			642.5
Corporate securities	1,103.4		18.0		(3.4		)	1,118.0
Residential mortgage-backed securities	388.3		3.6		(2.6		)	389.3
Commercial mortgage-backed securities	106.5		0.4		(0.9		)	106.0
Asset-backed securities	58.7		0.3		(0.2		)	58.8
Total fixed maturity securities	2,421.0		50.3		(7.9		)	2,463.4
Equity securities at fair value
Industrial and miscellaneous	100.8		81.5		(0.6		)	181.7
Non-redeemable preferred stock (FHLB)	4.7		—		—			4.7
Other	11.2		12.7		—			23.9
Total equity securities at fair value	116.7		94.2		(0.6		)	210.3
Short-term investments	4.0		—		—			4.0
Total AFS investments	$	2,541.7	$	144.5	$	(8.5	)	$	2,677.7

The cost and estimated fair value of the Company’s equity securities recorded at fair value at June 30, 2018 were as follows:

	Cost		Estimated Fair Value
	(in millions)
At June 30, 2018
Equity securities at fair value
Industrial and miscellaneous	$	99.4	$	172.6
Other	14.1		25.1
Total equity securities at fair value	$	113.5	$	197.7

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The amortized cost and estimated fair value of the Company's fixed maturity securities at June 30, 2018, by contractual maturity, are shown below. Expected maturities differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Estimated Fair Value
	(in millions)
Due in one year or less	$	177.8	$	178.3
Due after one year through five years	761.7		763.6
Due after five years through ten years	730.0		720.6
Due after ten years	130.9		134.3
Mortgage and asset-backed securities	617.6		604.4
Total	$	2,418.0	$	2,401.2

The following is a summary of AFS investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or greater as of June 30, 2018 and December 31, 2017.

	June 30, 2018						December 31, 2017
	Estimated Fair Value		Gross Unrealized Losses			Number of Issues	Estimated Fair Value		Gross Unrealized Losses			Number of Issues
	(in millions, except number of issues data)
Less than 12 months:
Fixed maturity securities
U.S. Treasuries	$	82.0	$	(1.6	)	27	$	86.0	$	(0.5	)	28
U.S. Agencies	3.7		(0.1		)	2	—		—			—
States and municipalities	84.0		(1.2		)	24	—		—			—
Corporate securities	811.5		(21.0		)	265	307.6		(2.3		)	113
Residential mortgage-backed securities	310.0		(8.1		)	93	165.0		(0.8		)	45
Commercial mortgage-backed securities	75.4		(2.0		)	34	41.8		(0.2		)	19
Asset-backed securities	53.1		(0.5		)	37	29.3		(0.2		)	25
Other securities	16.1		(0.1		)	23	—		—			—
Total less than 12 months	$	1,435.8	$	(34.6	)	505	$	629.7	$	(4.0	)	230
12 months or greater:
Fixed maturity securities
U.S. Treasuries	$	17.7	$	(0.3	)	9	$	23.4	$	(0.3	)	10
Corporate securities	36.1		(1.9		)	15	53.2		(1.1		)	17
Residential mortgage-backed securities	69.7		(3.7		)	32	77.1		(1.8		)	32
Commercial mortgage-backed securities	20.2		(1.1		)	8	25.1		(0.7		)	8
Total 12 months or greater	$	143.7	$	(7.0	)	64	$	178.8	$	(3.9	)	67

At December 31, 2017, the Company also had $0.6 million of gross unrealized losses on 24 equity securities that were in a continuous loss position for less than 12 months.

The Company recognized impairments on fixed maturity securities of $2.0 million (consisting of 57 securities) during the six months ended June 30, 2018 as a result of the Company's intent to sell these securities. There were no other-than-temporary impairments on fixed maturity securities recognized during the six months ended June 30, 2017. The Company determined that the remaining unrealized losses on fixed maturity securities for the six months ended June 30, 2018 were primarily the result of changes in prevailing interest rates and not the credit quality of the issuers. The fixed maturity securities whose total fair value was less than amortized cost were not determined to be other-than-temporarily impaired given the lack of severity and duration of the impairment, the credit quality of the issuers, the Company’s intent to not sell the securities, and a determination that it is not more likely than not that the Company will be required to sell the securities at an amount less than their amortized cost.

The adoption of ASU 2016-01 removed the impairment assessment for equity securities at fair value, and, beginning in 2018, changes in fair value are included in Net realized and unrealized (losses) gains on investments on the Company's Consolidated Statements of Comprehensive Income. Prior to the adoption of this standard, the Company recognized an impairment on equity securities of $0.2 million (consisting of one security) during the six months ended June 30, 2017. The other-than-temporary impairment recognized during this period was the result of the severity and duration of the change in fair value of this security.

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Certain unrealized losses on equity securities during the six months ended June 30, 2017 were not considered to be other-than-temporary due to the financial condition and near-term prospects of the issuers, and the Company's intent to hold the securities until fair value recovers to above cost.

Realized gains and losses on investments include the gain or loss on a security at the time of sale compared to its original or adjusted cost (equity securities) or amortized cost (fixed maturity securities). Realized losses on fixed maturity securities are also recognized when securities are written down as a result of an other-than-temporary impairment.

Net realized gains on investments and the change in unrealized gains (losses) on the Company's investments recorded at fair value are determined on a specific-identification basis and were as follows:

	Gross Realized Gains		Gross Realized Losses			Change in Net Unrealized Gains (Losses)			Changes in Fair Value Reflected in Earnings			Changes in Fair Value Reflected in AOCI, before tax
			(in millions)
Three Months Ended June 30, 2018
Fixed maturity securities	$	0.3	$	(0.3	)	$	(14.3	)	$	—		$	(14.3	)
Equity securities	2.6		(0.4		)	3.5			5.7			—
Total investments	$	2.9	$	(0.7	)	$	(10.8	)	$	5.7		$	(14.3	)
Six Months Ended June 30, 2018
Fixed maturity securities	$	2.1	$	(2.6	)	$	(59.2	)	$	(0.5	)	$	(59.2	)
Equity securities	8.1		(0.6		)	(9.4		)	(1.9		)	—
Total investments	$	10.2	$	(3.2	)	$	(68.6	)	$	(2.4	)	$	(59.2	)

Three Months Ended June 30, 2017
Fixed maturity securities	$	—	$	—		$	12.5		$	—	$	12.5
Equity securities	1.1		—			(0.7		)	1.1		(0.7		)
Total investments	$	1.1	$	—		$	11.8		$	1.1	$	11.8
Six Months Ended June 30, 2017
Fixed maturity securities	$	0.5	$	(0.1	)	$	18.9		$	0.4	$	18.9
Equity securities	3.1		(0.2		)	5.4			2.9		5.4
Total investments	$	3.6	$	(0.3	)	$	24.3		$	3.3	$	24.3

Net investment income was as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
	(in millions)
Fixed maturity securities	$	19.2		$	17.3		$	37.7		$	35.0
Equity securities	1.7			1.7			3.3			3.5
Cash equivalents and restricted cash	0.3			0.1			0.5			0.2
Gross investment income	21.2			19.1			41.5			38.7
Investment expenses	(0.9		)	(0.9		)	(1.8		)	(1.8		)
Net investment income	$	20.3		$	18.2		$	39.7		$	36.9

The Company is required by various state laws and regulations to hold securities or letters of credit in depository accounts with certain states in which it does business. These laws and regulations govern not only the amount but also the types of securities that are eligible for deposit. As of June 30, 2018 and December 31, 2017, securities having a fair value of $954.4 million and $1,009.7 million, respectively, were on deposit. Additionally, standby letters of credit from the FHLB were in place in lieu of $140.0 million of securities on deposit as of June 30, 2018 (See Note 9).

Certain reinsurance contracts require the Company's funds to be held in trust for the benefit of the ceding reinsurer to secure the outstanding liabilities assumed by the Company. The fair value of fixed maturity securities and restricted cash and cash equivalents held in trust for the benefit of ceding reinsurers at June 30, 2018 and December 31, 2017 was $22.9 million and $24.5 million, respectively.

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6. Income Taxes

Income tax expense for interim periods is measured using an estimated effective tax rate for the annual period. The Company's effective tax rates were 17.2% and 15.6% for the three and six months ended June 30, 2018, respectively, compared to 23.9% and 22.7% for the same periods of 2017. Tax-advantaged investment income, Deferred Gain amortization, LPT Reserve Adjustments, LPT Contingent Commission Adjustments, and certain other adjustments reduced the Company's effective income tax rate below the U.S. statutory rates of 21% and 35% for periods in 2018 and 2017, respectively.

7. Liability for Unpaid Losses and Loss Adjustment Expenses

The following table represents a reconciliation of changes in the liability for unpaid losses and LAE.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
	(in millions)
Unpaid losses and LAE at beginning of period	$	2,258.1		$	2,298.2		$	2,266.1		$	2,301.0
Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	531.1			572.9			537.0			580.0
Net unpaid losses and LAE at beginning of period	1,727.0			1,725.3			1,729.1			1,721.0
Losses and LAE, net of reinsurance, incurred during the period related to:
Current period	111.2			109.4			221.6			221.3
Prior periods	(16.5		)	(0.3		)	(28.9		)	(0.3		)
Total net losses and LAE incurred during the period	94.7			109.1			192.7			221.0
Paid losses and LAE, net of reinsurance, related to:
Current period	20.0			17.0			25.9			21.7
Prior periods	86.3			92.3			180.5			195.2
Total net paid losses and LAE during the period	106.3			109.3			206.4			216.9
Ending unpaid losses and LAE, net of reinsurance	1,715.4			1,725.1			1,715.4			1,725.1
Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	512.5			559.8			512.5			559.8
Unpaid losses and LAE at end of period	$	2,227.9		$	2,284.9		$	2,227.9		$	2,284.9

Total net losses and LAE included in the above table exclude amortization of the deferred reinsurance gain—LPT Agreement, LPT Reserve Adjustments, and LPT Contingent Commission Adjustments, which totaled $6.9 million and $3.1 million for the three months ended June 30, 2018 and 2017, respectively, and $9.5 million and $6.0 million for the six months ended June 30, 2018 and 2017, respectively (See Note 8).

The change in incurred losses and LAE attributable to prior periods included $16.5 million and $28.5 million of favorable development on the Company's voluntary risk business for the three and six months ended June 30, 2018, respectively, and $0.4 million of favorable development on the Company's assigned risk business for the six months ended June 30, 2018. The favorable prior accident year loss development on voluntary business during the three and six months ended June 30, 2018 was the result of the Company's determination that adjustments were necessary to reflect observed favorable paid loss trends. Paid loss trends have been impacted by cost savings associated with accelerated claims settlement activity that began in 2014 and continued in 2018.

8. LPT Agreement

The Company is party to the LPT Agreement under which $1.5 billion in liabilities for losses and LAE related to claims incurred by the Fund prior to July 1, 1995 were reinsured for consideration of $775.0 million. The LPT Agreement provides coverage up to $2.0 billion. The Company records its estimate of contingent profit commission in the accompanying Consolidated Balance Sheets as Contingent commission receivable–LPT Agreement and a corresponding liability is recorded in the accompanying Consolidated Balance Sheets in Deferred reinsurance gain–LPT Agreement. The Deferred Gain is being amortized using the recovery method. Amortization is determined by the proportion of actual reinsurance recoveries to total estimated recoveries over the life of the LPT Agreement, except for the contingent profit commission, which is amortized through June 30, 2024, the date through which the Company is entitled to receive a contingent profit commission under the LPT Agreement. The amortization is recorded in losses and LAE incurred in the accompanying consolidated statements of comprehensive income. Any adjustments

16

to the Deferred Gain are recorded in losses and LAE incurred in the accompanying consolidated statements of comprehensive income.

The Company amortized $4.2 million and $3.1 million of the Deferred Gain for the three months ended June 30, 2018 and 2017, respectively, and $6.8 million and $6.0 million for the six months ended June 30, 2018 and 2017, respectively. Additionally, the Deferred Gain was further reduced by $2.2 million for the three and six months ended June 30, 2018 due to a favorable LPT Reserve Adjustment and by $0.5 million of amortization for the three and six months ended June 30, 2018 due to a favorable LPT Contingent Commission Adjustment (see Note 2). The remaining Deferred Gain was $154.7 million and $163.6 million as of June 30, 2018 and December 31, 2017, respectively. The estimated remaining liabilities subject to the LPT Agreement were $420.3 million and $438.9 million as of June 30, 2018 and December 31, 2017, respectively. Losses and LAE paid with respect to the LPT Agreement totaled $761.6 million and $749.3 million from inception through June 30, 2018 and December 31, 2017, respectively.

9. Notes Payable and Other Financing Arrangements

Notes payable is comprised of the following:

	June 30, 2018		December 31, 2017
	(in millions)
Dekania Surplus Note, due April 29, 2034	$	10.0	$	10.0
Alesco Surplus Note, due December 15, 2034	10.0		10.0
Total	$	20.0	$	20.0

EPIC has a $10.0 million surplus note to Dekania CDO II, Ltd. issued as part of a pooled transaction. The note matures in 2034 and became callable by the Company in 2009. The terms of the note provide for quarterly interest payments at a rate 425 basis points in excess of the 90-day LIBOR. Both the payment of interest and repayment of the principal under this note and the surplus note described in the following paragraph are subject to the prior approval of the Florida Department of Financial Services.

EPIC has a $10.0 million surplus note to Alesco Preferred Funding V, LTD issued as part of a pooled transaction. The note matures in 2034 and became callable by the Company in 2009. The terms of the note provide for quarterly interest payments at a rate 405 basis points in excess of the 90-day LIBOR.

Other financing arrangements is comprised of the following:

Each of the Company's insurance subsidiaries is a member of the FHLB. Membership allows the insurance subsidiaries access to collateralized advances, which may be used to support and enhance liquidity management. The amount of advances that may be taken is dependent on statutory admitted assets on a per company basis. Currently, none of the Company's insurance subsidiaries has advances outstanding under the FHLB facility.

FHLB membership also allows the Company's insurance subsidiaries access to standby letters of credit. On March 9, 2018, ECIC, EPIC, and EAC entered into standby Letter of Credit Reimbursement Agreements (Letter of Credit Agreements) with the FHLB. The Letter of Credit Agreements are between FHLB and each of EAC, in the amount of $40.0 million, ECIC, in the amount of $50.0 million, and EPIC, in the amount of $50.0 million. The Letter of Credit Agreements became effective March 9, 2018 and expire March 31, 2019; however, the Letter of Credit Agreements will remain evergreen with automatic one-year extensions unless the FHLB notifies the beneficiary at least 60 days prior to the then applicable expiration date of its election not to renew. The Letter of Credit Agreements may only be used to satisfy, in whole or in part, insurance deposit requirements with the State of California and are fully secured with eligible collateral at all times. The Letter of Credit Agreements are subject to annual maintenance charges and a fee of 15 basis points on issued amounts. As of June 30, 2018, letters of credit totaling $140.0 million were issued in lieu of securities on deposit with the State of California under these Letter of Credit Agreements.

As of June 30, 2018, investment securities having a fair value of $258.7 million were pledged to FHLB by the Company's insurance subsidiaries in support of the collateralized advance facility and the Letter of Credit Agreements.

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10. Accumulated Other Comprehensive Income

Accumulated other comprehensive income is comprised of unrealized (losses) gains on investments classified as AFS, net of deferred tax expense. Beginning in 2018, with the adoption of ASU No. 2016-01, the Company's investments in equity securities at fair value are no longer considered to be AFS and are reported at fair value with unrealized gains and losses included in Net realized and unrealized (losses) gains on investments on the Company's Consolidated Statements of Comprehensive Income. Prior to 2018, investments in equity securities at fair value were classified as AFS and changes in fair value were excluded from earnings and reported in accumulated other comprehensive income. The following table summarizes the components of accumulated other comprehensive (loss) income:

	June 30, 2018			December 31, 2017
	(in millions)
Net unrealized (losses) gains on investments, before taxes	$	(16.8	)	$	136.0
Deferred tax benefit (expense) on net unrealized (losses) gains	3.5			(28.6		)
Total accumulated other comprehensive (loss) income	$	(13.3	)	$	107.4

11. Stock-Based Compensation

The Company awarded restricted stock units (RSUs) and performance share units (PSUs) to certain employees and non-employee Directors of the Company as follows:

	Number Awarded	Weighted Average Fair Value on Date of Grant		Aggregate Fair Value on Date of Grant
				(in millions)
March 2018
RSUs(1)	71,400	$	40.30	$	2.9
RSUs(2)	736	40.50		—
PSUs(3)	96,940	40.30		3.9
May 2018
RSUs(4)	13,347	$	39.65	$	0.5

(1) The RSUs awarded in March 2018 were awarded to certain employees of the Company and vest 25% on March 15, 2019, and each of the subsequent three anniversaries of that date. The RSUs are subject to accelerated vesting in certain circumstances, including but not limited to: death, disability, retirement, or in connection with a change of control of the Company.

(2) The RSUs awarded in March 2018 were awarded to non-employee Directors of the Company and vested in full on May 25, 2018.

(3) The PSUs awarded in March 2018 were awarded to certain employees of the Company and have a performance period of two years followed by an additional one year vesting period. The PSU awards are subject to certain performance goals with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate number of PSUs awarded at the target level.

(4) The RSUs awarded in May 2018 were awarded to non-employee Directors of the Company and vest in full on May 24, 2019.

Employees who were awarded RSUs and PSUs are entitled to receive dividend equivalents for eligible awards, payable in cash, when the underlying award vests and becomes payable. If the underlying award does not vest or is forfeited, any dividend equivalents with respect to the underlying award will also fail to become payable and will be forfeited.

Stock options exercised totaled 13,800 for the six months ended June 30, 2018, 167,026 for the six months ended June 30, 2017, and 307,076 for the year ended December 31, 2017.

As of June 30, 2018, the Company had 233,547 options, 313,426 RSUs, and 266,535 PSUs (based on target number awarded) outstanding.

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12. Earnings Per Share

Basic earnings per share is computed by dividing net income by the weighted average number of shares outstanding for the period. Diluted earnings per share reflects the potential dilutive impact of all common stock equivalents on earnings per share. Diluted earnings per share includes shares that are assumed to be issued under the “treasury stock method,” which reflects the potential dilution that would occur if outstanding RSUs and PSUs had vested and options were to be exercised.

Commencing in 2017, certain stock-based compensation awards are eligible to receive dividend equivalents on awards that fully vest or become payable. The dividend equivalents are reflected in the Company's net income; therefore, these awards are not considered participating securities for the purposes of determining earnings per share.

The following table presents the net income and the weighted average number of shares outstanding used in the earnings per common share calculations.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(in millions, except share data)
Net income—basic and diluted	$	42.5	$	24.8	$	68.1	$	48.0
Weighted average number of shares outstanding—basic	32,880,023		32,469,137		32,843,448		32,398,858
Effect of dilutive securities:
PSUs	202,149		235,617		253,098		272,754
Stock options	100,357		230,049		100,635		227,856
RSUs	40,177		57,795		62,578		83,460
Dilutive potential shares	342,683		523,461		416,311		584,070
Weighted average number of shares outstanding—diluted	33,222,706		32,992,598		33,259,759		32,982,928

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

You should read the following discussion and analysis in conjunction with our consolidated financial statements and the related notes thereto included in Item 1 of Part I. Unless otherwise indicated, all references to “we,” “us,” “our,” “the Company,” or similar terms refer to EHI, together with its subsidiaries. The information contained in this quarterly report is not a complete description of our business or the risks associated with an investment in our common stock. We urge you to carefully review and consider the various disclosures made by us in this quarterly report and in our other reports filed with the Securities and Exchange Commission (SEC), including our Annual Report.

The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements if accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those discussed. You should not place undue reliance on these statements, which speak only as of the date of this report. Forward-looking statements include those related to our expected financial position, business, financing plans, litigation, future premiums, revenues, earnings, pricing, investments, business relationships, strategic initiatives, expected losses, accident year loss estimates, loss experience, loss reserves, acquisitions, competition, the impact of changes in interest rates, rate increases with respect to our business, and the insurance industry in general. Statements including words such as “expect,” “intend,” “plan,” “believe,” “estimate,” “may,” “anticipate,” “will,” or similar statements of a future or forward-looking nature identify forward-looking statements.

We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law. All forward-looking statements address matters that involve risks and uncertainties that could cause actual results to differ materially from historical or anticipated results, depending on a number of factors. These risks and uncertainties include, but are not limited to, those described in our Annual Report and other documents that we have filed with the SEC.

Overview

We are a Nevada holding company. Through our insurance subsidiaries, we provide workers’ compensation insurance coverage to select, small businesses in low to medium hazard industries. Workers’ compensation insurance is provided under a statutory system wherein most employers are required to provide coverage for their employees’ medical, disability, vocational rehabilitation, and/or death benefit costs for work-related injuries or illnesses. We provide workers’ compensation insurance in 42 states and the District of Columbia, with a concentration in California, where over one-half of our business is generated. Our revenues are primarily comprised of net premiums earned, net investment income, and net realized and unrealized gains on investments.

We target small businesses, as we believe that this market is traditionally characterized by fewer competitors, more attractive pricing, and stronger persistency when compared to the U.S. workers’ compensation insurance industry in general. We believe we are able to price our policies at levels that are competitive and profitable over the long-term given our expertise in underwriting this market segment. Our underwriting approach is to consistently underwrite small business accounts at appropriate and competitive prices without sacrificing long-term profitability and stability for short-term top-line revenue growth.

Our strategy is to pursue profitable growth opportunities across market cycles and maximize total investment returns within the constraints of prudent portfolio management. We pursue profitable growth opportunities by focusing on disciplined underwriting and claims management, utilizing medical provider networks designed to produce superior medical and indemnity outcomes, establishing and maintaining strong, long-term relationships with independent insurance agencies, development and implementation of new technologies, and developing important alternative distribution channels. We continue to execute a number of ongoing business initiatives, including: focusing on internal and customer-facing business process excellence; accelerating the settlement of open claims; diversifying our risk exposure across geographic markets; utilizing a multi-company pricing platform; utilizing territory-specific pricing; and leveraging data-driven strategies to target, price, and underwrite profitable classes of business across all of our markets.

The insurance industry is highly competitive, and there is significant competition in the national workers' compensation industry that is based on price and quality of services. We compete with other specialty workers' compensation carriers, state agencies, multi-line insurance companies, professional employer organizations, self-insurance funds, and state insurance pools.

Pricing on our renewals showed an overall price decrease of 9.7% versus the rate level in effect on such business a year earlier for each of the three and six months ended June 30, 2018. We believe that we can continue to write attractive business due to favorable loss costs and frequency trends and the success of our accelerated claims initiatives, despite the competitive market conditions we currently face. Given the strength of our balance sheet and the execution of our underwriting, claims, and investment strategies, we believe that we are well positioned for the current market cycle.

On August 11, 2017, we entered into, and on May 23, 2018, we amended, a Purchase Agreement with PRUS with respect to the Acquisition of all of the outstanding shares of capital stock of PRNY. The purchase price is equal to the sum of: (i) the amount of

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statutory capital and surplus of PRNY at closing (which is currently estimated to be approximately $40.0 million); and (ii) $5.8 million. We expect to fund the Acquisition with cash on hand.

Pursuant to the Purchase Agreement, all liabilities and obligations of PRNY existing as of the closing date, whether known or unknown, will be indemnified by PRUS. In addition, PartnerRe Ltd., the parent company of PRUS, has provided us with a Guaranty that unconditionally, absolutely and irrevocably guarantees the full and prompt payment and performance by PRUS of all of its obligations, liabilities and indemnities under the Purchase Agreement and the transactions contemplated thereby.

We will not be acquiring any employees or ongoing business operations pursuant to the Acquisition. The Acquisition is subject to certain closing conditions, including, among other things, approval from the Department of Financial Services of the State of New York.

Results of Operations

A primary measure of our performance is our ability to increase Adjusted stockholders' equity over the long-term. We believe that this measure is important to our investors, analysts, and other interested parties who benefit from having an objective and consistent basis for comparison with other companies within our industry. The following table shows a reconciliation of our Stockholders' equity on a GAAP basis to our Adjusted stockholders' equity.

	June 30, 2018			December 31, 2017
	(in millions)
GAAP stockholders' equity	$	956.5		$	947.7
Deferred reinsurance gain–LPT Agreement	154.7			163.6
Less: Accumulated other comprehensive (loss) income, net(1)	(13.3		)	107.4
Adjusted stockholders' equity(2)	$	1,124.5		$	1,003.9

(1) The adoption of ASU No. 2016-01 resulted in a $74.0 million reclassification adjustment from Accumulated other comprehensive income, net to Retained earnings as of January 1, 2018.

(2) Adjusted stockholders' equity is a non-GAAP measure consisting of total GAAP stockholders' equity plus the Deferred Gain, less Accumulated other comprehensive (loss) income, net.

Our net income was $42.5 million and $68.1 million for the three and six months ended June 30, 2018, respectively, compared to $24.8 million and $48.0 million for the corresponding periods of 2017. Our underwriting income was $25.6 million and $44.0 million for the three and six months ended June 30, 2018, respectively, compared to $11.5 million and $20.5 million for the same periods of 2017. Underwriting income or loss is determined by deducting losses and LAE, commission expense, and underwriting and other operating expenses from net premiums earned.

Our results of operations during the three months ended June 30, 2018 were impacted by: (i) favorable prior accident year loss development of $16.5 million, which decreased our losses and LAE by the same amount; (ii) favorable development in the estimated reserves ceded under the LPT Agreement that resulted in a $2.2 million cumulative adjustment to the Deferred Gain and reduced our losses and LAE by the same amount (LPT Reserve Adjustment); (iii) an increase in the contingent commission receivable under the LPT Agreement that resulted in a $0.5 million cumulative adjustment, which reduced our losses and LAE by the same amount (LPT Contingent Commission Adjustment); and (iv) the inclusion of $3.5 million in net unrealized gains on equity securities during the period (unrealized gains and losses on equity securities were not included in net income during the comparable 2017 period). Collectively, these items increased our pre-tax net income by $22.7 million during the second quarter of 2018. Additionally, our income tax expense was favorably impacted by the Tax Cuts and Jobs Act, which reduced the statutory tax rate from 35% to 21% beginning in 2018.

Our results of operations during the six months ended June 30, 2018 were impacted by: (i) favorable prior accident year loss development of $28.9 million, which decreased our losses and LAE by the same amount; (ii) favorable development in the estimated reserves ceded under the LPT Agreement that resulted in a $2.2 million LPT Reserve Adjustment during the second quarter of 2018; (iii) an increase in the contingent commission receivable under the LPT Agreement that resulted in a $0.5 million LPT Contingent Commission Adjustment during the second quarter of 2018; and (iv) the inclusion of $9.4 million in net unrealized losses on equity securities during the period (unrealized gains and losses on equity securities were not included in net income during the comparable 2017 period). Collectively, these items increased our pre-tax net income by $22.2 million during six months ended June 30, 2018. Additionally, our income tax expense was favorably impacted by the Tax Cuts and Jobs Act, which reduced the statutory tax rate from 35% to 21% beginning in 2018.

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The components of net income are set forth in the following table:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018			2017
	(in millions)
Gross premiums written	$	186.4	$	184.5	$	398.0		$	382.1
Net premiums written	$	185.0	$	183.0	$	395.2		$	379.1
Net premiums earned	$	178.0	$	171.7	$	354.6		$	347.1
Net investment income	20.3		18.2		39.7			36.9
Net realized and unrealized gains (losses) on investments	5.7		1.1		(2.4		)	3.3
Gain on redemption of notes payable	—		2.1		—			2.1
Other income	0.1		0.1		0.1			0.1
Total revenues	204.1		193.2		392.0			389.5
Losses and LAE	87.8		106.1		183.2			215.0
Commission expense	24.5		21.5		48.2			43.0
Underwriting and other operating expenses	40.1		32.6		79.2			68.6
Interest and financing expenses	0.4		0.4		0.7			0.8
Total expenses	152.8		160.6		311.3			327.4
Income tax expense	8.8		7.8		12.6			14.1
Net income	$	42.5	$	24.8	$	68.1		$	48.0
Less amortization of the Deferred Gain related to losses	$	3.6	$	2.5	$	5.7		$	4.9
Less amortization of the Deferred Gain related to contingent commission	0.6		0.6		1.1			1.1
Less impact of LPT Reserve Adjustments(1)	2.2		—		2.2			—
Less impact of LPT Contingent Commission Adjustments(2)	0.5		—		0.5			—
Net income before impact of the LPT Agreement(3)	$	35.6	$	21.7	$	58.6		$	42.0

(1) LPT Reserve Adjustments result in a cumulative adjustment to the Deferred Gain, which is recognized in losses and LAE incurred on our Consolidated Statements of Comprehensive Income, such that the Deferred Gain reflects the balance that would have existed had the revised reserves been recognized at the inception of the LPT Agreement. (See Note 2 in the Notes to our Consolidated Financial Statements.)

(2) LPT Contingent Commission Adjustments result in an adjustment to the Deferred Gain, which is recognized in losses and LAE incurred on our Consolidated Statements of Comprehensive Income, such that the Deferred Gain reflects the balance that would have existed had the revised contingent profit commission been recognized at the inception of the LPT Agreement. (See Note 2 in the Notes to our Consolidated Financial Statements.)

(3) We define net income before impact of the LPT Agreement as net income before the impact of: (a) amortization of the Deferred Gain; (b) adjustments to the LPT Agreement ceded reserves; and (c) adjustments to the Contingent commission receivable–LPT Agreement. The Deferred Gain reflects the unamortized gain from the LPT Agreement. Under GAAP, this gain is deferred and is being amortized using the recovery method in which amortization is determined by the proportion of actual reinsurance recoveries to total estimated recoveries over the life of the LPT Agreement, except for the contingent profit commission, which is amortized through June 30, 2024. The amortization is reflected in losses and LAE. We periodically reevaluate the remaining direct reserves subject to the LPT Agreement and the expected losses and LAE subject to the contingent profit commission under the LPT Agreement. Our reevaluation results in corresponding adjustments, if needed, to reserves, ceded reserves, contingent commission receivable, and the Deferred Gain, with the net effect being an increase or decrease to our net income. Net income before impact of the LPT Agreement is not a measurement of financial performance under GAAP, but rather reflects a difference in accounting treatment between statutory and GAAP, and should not be considered in isolation or as an alternative to net income before income taxes or net income, or any other measure of performance derived in accordance with GAAP.

We present net income before impact of the LPT Agreement because we believe that it is an important supplemental measure of our ongoing operating performance to be used by analysts, investors, and other interested parties in evaluating us. The LPT Agreement was a non-recurring transaction under which the Deferred Gain does not affect our ongoing operations, and, consequently, we believe this presentation is useful in providing a meaningful understanding of our operating performance. In addition, we believe this non-GAAP measure, as we have defined it, is helpful to our management in identifying trends in our performance because the LPT Agreement has limited significance on our current and ongoing operations.

Gross Premiums Written

Gross premiums written were $186.4 million and $398.0 million for the three and six months ended June 30, 2018, respectively, compared to $184.5 million and $382.1 million for the corresponding periods of 2017. The year-over-year increases for the three

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and six months ended June 30, 2018 were primarily due to increases in new business premiums written, partially offset by declines in renewal business premiums. The increase in new business premiums was primarily driven by higher policy counts, partially offset by decreases in average rates.

Net Premiums Written

Net premiums written were $185.0 million and $395.2 million for the three and six months ended June 30, 2018, respectively, compared to $183.0 million and $379.1 million for the corresponding periods of 2017. Reinsurance premiums ceded were $1.4 million and $2.8 million for the three and six months ended June 30, 2018, respectively, compared to $1.5 million and $3.0 million for the corresponding periods of 2017.

Net Premiums Earned

Net premiums earned were $178.0 million and $354.6 million for the three and six months ended June 30, 2018, respectively, compared to $171.7 million and $347.1 million for the corresponding periods of 2017. Net premiums earned are primarily a function of the amount and timing of net premiums previously written.

The following table shows the percentage change in our in-force premiums, policy count, average policy size, and payroll exposure upon which our premiums are based for California, where 54% of our premiums were generated as of June 30, 2018 and for all other states, excluding California:

	As of June 30, 2018
	Year-to-Date Increase (Decrease)						Year-Over-Year Increase (Decrease)
	Overall		California		All Other States		Overall		California		All Other States
In-force premiums	3.9	%	1.2	%	7.4	%	4.9	%	1.3	%	9.4	%
In-force policy count	3.2		(0.4	)	6.5		3.3		(2.3	)	8.5
Average in-force policy size	0.7		1.6		0.9		1.6		3.7		0.8
In-force payroll exposure	11.1		9.4		12.0		13.1		13.7		12.7

The following table shows our in-force premiums and number of policies in-force for each state with at least five percent of our in-force premiums and all other states combined for the periods presented:

	June 30, 2018			December 31, 2017			June 30, 2017			December 31, 2016
State	In-force Premiums		Policies In-force	In-force Premiums		Policies In-force	In-force Premiums		Policies In-force	In-force Premiums		Policies In-force
	(dollars in millions)
California	$	353.6	40,400	$	349.4	40,573	$	348.9	41,346	$	348.3	42,120
Florida	43.0		5,734	41.8		5,625	39.1		5,527	35.2		5,263
Other (40 states and D.C.)	255.1		42,108	235.7		39,296	233.4		38,569	235.1		37,439
Total	$	651.7	88,242	$	626.9	85,494	$	621.4	85,442	$	618.6	84,822

Our alternative distribution channels that utilize partnerships and alliances generated $156.0 million and $127.3 million, or 23.9% and 20.5%, of our in-force premiums as of June 30, 2018 and 2017, respectively. We believe that the bundling of products and services through these relationships contributes to higher retention rates than business generated by our independent agents. These relationships also allow us to access new customers that we may not have access to through our independent agent distribution channel. We continue to actively seek new partnerships and alliances.

Net Investment Income and Net Realized and Unrealized Gains on Investments

We invest in fixed maturity securities, equity securities, short-term investments, and cash equivalents. Net investment income includes interest and dividends earned on our invested assets and amortization of premiums and discounts on our fixed maturity securities, less bank service charges and custodial and portfolio management fees. We have established a high quality/short duration bias in our investment portfolio.

Net investment income increased11.5% and 7.6% for the three and six months ended June 30, 2018, respectively, compared to the same periods of 2017. The average pre-tax book yield on invested assets increased to 3.29% as of June 30, 2018, up from 3.12% as of June 30, 2017. Average invested assets remained relatively consistent year-over-year.

Realized and certain unrealized gains and losses on our investments are reported separately from our net investment income. Realized gains and losses on investments include the gain or loss on a security at the time of sale compared to its original or adjusted cost (equity securities) or amortized cost (fixed maturity securities). Realized losses are also recognized when securities are written down as a result of an other-than-temporary impairment. Beginning in 2018, equity securities at fair value are no longer

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classified as AFS and changes in fair value are included in Net realized and unrealized gains (losses) on investments on our Consolidated Statements of Comprehensive Income.

Net realized and unrealized gains (losses) on investments were $5.7 million and $(2.4) million for the three and six months ended June 30, 2018, respectively, compared to $1.1 million and $3.3 million for the corresponding periods of 2017. The net realized and unrealized gains on investments for the three months ended June 30, 2018 included $3.5 million of unrealized gains on equity securities and $2.2 million of net realized gains on investments. The net realized and unrealized losses on investments for the six months ended June 30, 2018 included $9.4 million of unrealized losses on equity securities, partially offset by $7.0 million of net realized gains on investments. The unrealized gains and losses on equity securities for the three and six months ended June 30, 2018 were primarily the result of volatility in equity markets during those periods, particularly with respect to the energy sector. Realized gains in both periods were primarily related to the sale of fixed maturity and equity securities, resulting from routine rebalancing of our investment portfolio. Net realized and unrealized gains (losses) on investments included $2.0 million and $0.2 million of other-than-temporary impairments for the six months ended June 30, 2018 and 2017, respectively.

Additional information regarding our Investments is set forth under “—Liquidity and Capital Resources—Investments.”

Losses and LAE, Commission Expenses, and Underwriting and Other Operating Expenses

The combined ratio, a key measurement of underwriting profitability, is the sum of the loss and LAE ratio, the commission expense ratio, and the underwriting and other operating expenses ratio. A combined ratio below 100% indicates that an insurance company is generating an underwriting profit, and conversely, a combined ratio above 100% indicates that an insurance company is generating an underwriting loss.

The following table presents our calendar year combined ratios.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Loss and LAE ratio	49.3	%	61.8	%	51.7	%	61.9	%
Underwriting and other operating expenses ratio	22.5		19.0		22.3		19.8
Commission expense ratio	13.8		12.5		13.6		12.4
Combined ratio	85.6	%	93.3	%	87.6	%	94.1	%

We include all of the operating expenses of our holding company in the calculation of our combined ratio, which added approximately 2.2 and 2.3 percentage points to that ratio for the three and six months ended June 30, 2018, respectively, compared to 2.0 and 2.1 percentage points for the corresponding periods of 2017.

Loss and LAE Ratio

Losses and LAE represents our largest expense item and includes claim payments made, amortization of the Deferred Gain, estimates for future claim payments and changes in those estimates for current and prior periods, and costs associated with investigating, defending, and adjusting claims. The quality of our financial reporting depends in large part on accurately predicting our losses and LAE, which are inherently uncertain as they are estimates of the ultimate cost of individual claims based on actuarial estimation techniques.

Our indemnity claims frequency (the number of claims expressed as a percentage of payroll) continued to decrease year-over-year; however, during the first half of 2018, we saw a slight upward movement in medical and indemnity costs per claim that is reflected in our current accident year loss estimate. We believe our current accident year loss estimate is adequate; however, ultimate losses will not be known with any certainty for many years.

Our loss and LAE ratio decreased 12.5 and 10.2 percentage points, or 20.2% and 16.5%, for the three and six months ended June 30, 2018, compared to the same periods of 2017. The decreases in our loss and LAE ratios were primarily attributable to favorable prior accident year loss development of $16.5 million and $28.9 million during the three and six months ended June 30, 2018, respectively. Favorable development during the three months ended June 30, 2018 was entirely attributable to our voluntary business, while favorable development for the six months ended June 30, 2018 included $28.5 million on our voluntary business and $0.4 million on our assigned risk business. Favorable development during the three and six months ended June 30, 2017 was related to our assigned risk business. Favorable prior accident year loss development in both periods of 2018 was primarily the result of observed favorable loss cost trends, primarily for the 2015 through 2017 accident years, which have been impacted by our internal initiatives to reduce loss costs, including the accelerated claims settlement activity that began in 2014 and have continued into 2018.

Our current accident year loss and LAE ratio was 62.5% for each of the three and six months ended June 30, 2018 compared to 63.8% for each of the corresponding periods of 2017. Our current accident year loss and LAE ratios continue to reflect the impact of key business initiatives, including: an emphasis on the accelerated settlement of open claims; diversifying our risk exposure

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across geographic markets; and leveraging data-driven strategies to target, underwrite, and price profitable classes of business across all of our markets.

Excluding the impact from the LPT, losses and LAE would have been $94.7 million and $109.2 million, or 53.2% and 63.6% of net premiums earned, for the three months ended June 30, 2018 and 2017, respectively. For the six months ended June 30, 2018 and 2017 losses and LAE, excluding the impact of the LPT, would have been $192.7 million and $221.0 million, or 54.3% and 63.7% of net premium earned, respectively.

The table below reflects prior accident year loss and LAE reserve adjustments and the impact of the LPT on net income before income taxes.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(in millions)
Prior accident year favorable loss development, net	$	16.5	$	0.3	$	28.9	$	0.3
Amortization of the Deferred Gain related to losses	$	3.6	$	2.5	$	5.7	$	4.9
Amortization of the Deferred Gain related to contingent commission	0.6		0.6		1.1		1.1
Impact of LPT Reserve Adjustments	2.2		—		2.2		—
Impact of LPT Contingent Commission Adjustments	0.5		—		0.5		—
Total impact of the LPT on losses and LAE	6.9		3.1		9.5		6.0
Total losses and LAE reserve adjustments	$	23.4	$	3.4	$	38.4	$	6.3

Underwriting and Other Operating Expenses Ratio

Underwriting and other operating expenses are those costs that we incur to underwrite and maintain the insurance policies we issue, excluding commission. These expenses include premium taxes and certain other general expenses that vary with, and are primarily related to, producing new or renewal business. Other underwriting expenses include policyholder dividends, changes in estimates of future write-offs of premiums receivable, general administrative expenses such as salaries and benefits, rent, office supplies, depreciation, and all other operating expenses not otherwise classified separately. Policy acquisition costs are variable based on premiums earned. Other operating expenses are more fixed in nature and become a smaller percentage of net premiums earned as premiums increase.

Our underwriting and other operating expenses ratio increased 3.5 and 2.5 percentage points, or 18.4% and 12.6%, for the three and six months ended June 30, 2018, compared to the same periods of 2017. During the three months ended June 30, 2018, our compensation-related expenses increased $2.4 million, our bad debt expense increased $2.3 million, our professional fees increased $1.5 million, and our premium taxes and assessments increased $0.9 million compared to the same period of 2017. During the six months ended June 30, 2018, our compensation-related expenses increased $3.4 million, our bad debt expense increased $2.7 million, our professional fees increased $2.6 million, and our premium taxes and assessments increased $1.1 million compared to the same period of 2017. These increases were largely the result of our aggressive development and implementation of new digital technologies and capabilities.

Commission Expense Ratio

Commission expenses include direct commissions to our agents and brokers, including our partnerships and alliances, for the premiums that they produce for us, as well as incentive payments, other marketing costs, and fees.

Our commission expense ratio increased 1.3 and 1.2 percentage points, or 10.4% and 9.7%, for the three and six months ended June 30, 2018, compared to the same periods of 2017. The increases in the commission expense ratio were primarily the result of an increase in projected 2018 agency incentive commissions and a 16.6% year-over-year increase in the percentage of business produced by our partnerships and alliances, which is subject to a higher commission rate, as of June 30, 2018.

Income Tax Expense

Income tax expense was $8.8 million and $12.6 million for the three and six months ended June 30, 2018, respectively, compared to $7.8 million and $14.1 million for the corresponding periods of 2017. The effective tax rates were 17.2% and 15.6% for the three and six months ended June 30, 2018, respectively, compared to 23.9% and 22.7% for the same periods of 2017. Tax-advantaged investment income, Deferred Gain amortization, LPT Reserve Adjustments, LPT Contingent Commission Adjustments, and certain other adjustments reduced our effective income tax rate below the U.S. statutory rates of 21% and 35% for periods in 2018 and 2017, respectively.

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Liquidity and Capital Resources

Holding Company Liquidity

We are a holding company and our ability to fund our operations is contingent upon existing capital and the ability of our subsidiaries to pay dividends up to the holding company. Payment of dividends by our insurance subsidiaries is restricted by state insurance laws and regulations, including laws establishing minimum solvency and liquidity thresholds. We require cash to pay stockholder dividends, repurchase common stock, make interest and principal payments on any outstanding debt obligations, provide additional surplus to our insurance subsidiaries, and fund our operating expenses.

Our insurance subsidiaries' ability to pay dividends to their parent is based on reported capital, surplus, and dividends paid within the prior 12 months. The maximum dividends that may be paid in 2018 by EPIC without prior regulatory approval is $15.9 million. ECIC can pay $10.4 million of dividends through August 8, 2018 and $48.4 million thereafter without prior regulatory approval. During the first quarter of 2018, EICN made a $17.7 million cash dividend payment to its parent company. As a result of that payment, EICN's dividend capacity is limited to $2.2 million without prior regulatory approval for the remainder of 2018. During the second quarter of 2018, EAC made a $18.9 million cash dividend payment to its parent company. As a result of that payment, EAC's dividend capacity is limited to $0.1 million without prior regulatory approval for the remainder of 2018.

Total cash and investments at the holding company was $101.1 million at June 30, 2018, consisting of $83.4 million of cash and cash equivalents and $17.7 million of unaffiliated fixed maturity securities. We do not currently have a revolving credit facility because we believe that the holding company's cash needs for the foreseeable future will be met with its cash and investments on hand, as well as dividends available from our insurance subsidiaries.

Operating Subsidiaries' Liquidity

The primary sources of cash for our operating subsidiaries, which include our insurance and other operating subsidiaries, are premium collections, investment income, sales and maturities of investments, and reinsurance recoveries. The primary uses of cash for our operating subsidiaries are payments of losses and LAE, commission expenses, underwriting and other operating expenses, ceded reinsurance, investment purchases and dividends paid to their parent.

Total cash and investments held by our operating subsidiaries was $2,651.5 million at June 30, 2018, consisting of $63.9 million of cash and cash equivalents, $2,383.5 million of fixed maturity securities, and $204.1 million of equity securities. Sources of immediate and unencumbered liquidity at our operating subsidiaries as of June 30, 2018 consisted of $61.9 million of cash and cash equivalents, $197.7 million of publicly traded equity securities whose proceeds are available within three business days, and $1,341.2 million of highly liquid fixed maturity securities whose proceeds are available within three business days. We believe that our subsidiaries' liquidity needs over the next 24 months will be met with cash from operations, investment income, and maturing investments.

Each of our insurance subsidiaries is a member of the FHLB. Membership allows our insurance subsidiaries access to collateralized advances, which may be used to support and enhance liquidity management. The amount of advances that may be taken is dependent on statutory admitted assets on a per company basis. Currently, none of our insurance subsidiaries has advances outstanding under the FHLB facility.

FHLB membership also allows our insurance subsidiaries access to Letter of Credit Agreements and on March 9, 2018, ECIC, EPIC, and EAC entered into Letter of Credit Agreements with the FHLB. The Letter of Credit Agreements are between FHLB and each of EAC, in the amount of $40.0 million, ECIC, in the amount of $50.0 million, and EPIC, in the amount of $50.0 million. The Letter of Credit Agreements became effective March 9, 2018 and expire March 31, 2019. The Letter of Credit Agreements may only be used to satisfy, in whole or in part, insurance deposit requirements with the State of California and are fully secured with eligible collateral at all times (See Note 8).

We purchase reinsurance to protect us against the costs of severe claims and catastrophic events. On July 1, 2018, we entered into a new reinsurance program that is effective through June 30, 2019. The reinsurance program consists of one treaty covering excess of loss and catastrophic loss events in four layers of coverage. Our reinsurance coverage is $190.0 million in excess of our $10.0 million retention on a per occurrence basis, subject to certain exclusions. We believe that our reinsurance program meets our needs and that we are sufficiently capitalized.

Various state laws and regulations require us to hold investment securities or letters of credit on deposit with certain states in which we do business. These laws and regulations govern both the amount and types of investment securities that are eligible for deposit. Securities having a fair value of $954.4 million and $1,009.7 million were on deposit at June 30, 2018 and December 31, 2017, respectively. Additionally, standby letters of credit from the FHLB have been issued in lieu of $140.0 million of securities on deposit at June 30, 2018.

Certain reinsurance contracts require company funds to be held in trust for the benefit of the ceding reinsurer to secure the outstanding liabilities we assumed. The fair value of fixed maturity securities held in trust for the benefit of our ceding reinsurers was $22.9 million and $24.5 million at June 30, 2018 and December 31, 2017, respectively.

26

Sources of Liquidity

We monitor the cash flows of each of our subsidiaries individually, as well as collectively as a consolidated group. We use trend and variance analyses to project future cash needs, making adjustments to our forecasts as appropriate.

The table below shows our net cash flows for the six months ended:

	June 30,
	2018			2017
	(in millions)
Cash, cash equivalents, and restricted cash provided by (used in):
Operating activities	$	86.2		$	42.6
Investing activities	3.2			(52.0		)
Financing activities	(16.4		)	(18.4		)
Increase (decrease) in cash, cash equivalents, and restricted cash	$	73.0		$	(27.8	)

For additional information regarding our cash flows, see Item 1, Consolidated Statements of Cash Flows.

Operating Activities

Net cash provided by operating activities for the six months ended June 30, 2018 included net premiums received of $370.0 million, and investment income received of $45.1 million. These operating cash inflows were partially offset by net claims payments of $206.7 million, underwriting and other operating expenses paid of $74.5 million, and commissions paid of $45.0 million.

Net cash provided by operating activities for the six months ended June 30, 2017 included net premiums received of $349.5 million, and investment income received of $44.5 million. These operating cash inflows were partially offset by net claims payments of $216.6 million, underwriting and other operating expenses paid of $79.9 million, and commissions paid of $39.2 million.

Investing Activities

Net cash provided by investing activities for the six months ended June 30, 2018 was primarily related to sales, maturities, and redemptions of investments whose proceeds were used to accumulate cash on hand, fund claims payments, underwriting and other operating expenses, and stockholder dividend payments, partially offset by the investment of premiums received and the reinvestment of funds from sales, maturities, redemptions, and interest income.

Net cash used in investing activities for the six months ended June 30, 2017 was primarily related to the investment of premiums received and the reinvestment of funds from sales, maturities, redemptions, and interest income. These investing cash outflows were partially offset by investment sales whose proceeds were used to fund claims payments, underwriting and other operating expenses, and stockholder dividend payments.

Financing Activities

Net cash used in financing activities for the six months ended June 30, 2018 was primarily related to stockholder dividend payments.

Net cash used in financing activities for the six months ended June 30, 2017 was primarily related to stockholder dividend payments and the redemption of notes payable.

Dividends

Stockholder dividends paid were $13.3 million and $9.8 million for the six months ended June 30, 2018 and 2017, respectively. On July 25, 2018, the Board of Directors declared a $0.20 dividend per share and eligible RSU and PSU, payable August 22, 2018, to stockholders of record on August 8, 2018.

Share Repurchases

On February 21, 2018, the Board of Directors authorized a share repurchase program for repurchases of up to $50.0 million of our common stock (the 2018 Program). The 2018 Program provides that shares may be purchased at prevailing market prices from February 26, 2018 through February 26, 2020 through a variety of methods, including open market or private transactions, in accordance with applicable laws and regulations and as determined by management. The timing and actual number of shares that may be repurchased will depend on a variety of factors, including the share price, corporate and regulatory requirements, and other market and economic conditions. Repurchases under the 2018 Program may be commenced, modified, or suspended from time to time without prior notice, and the program may be suspended or discontinued at any time. Through June 30, 2018, we repurchased a total of 9,797 shares of common stock under the 2018 Program at an average price of $39.77 per share, including commissions, for a total cost of $0.4 million.

27

Capital Resources

As of June 30, 2018, the capital resources available to us consisted of: (i) $20.0 million in surplus notes maturing in 2034; (ii) $956.5 million of stockholders’ equity; and (iii) the $154.7 million Deferred Gain.

Contractual Obligations and Commitments

The following table identifies our long-term debt and contractual obligations as of June 30, 2018.

	Payment Due By Period
	Total		Less Than 1-Year		1-3 Years		4-5 Years		More Than 5 Years
	(in millions)
Operating leases	$	24.9	$	5.2	$	8.5	$	4.1	$	7.1
Non-cancellable obligations	19.3		3.3		7.8		6.2		2.0
Notes payable(1)	41.0		1.3		2.6		2.6		34.5
Capital leases	1.1		0.3		0.6		0.2		—
Unpaid losses and LAE reserves (2)(3)	2,227.9		386.6		487.7		289.1		1,064.5
Total contractual obligations	$	2,314.2	$	396.7	$	507.2	$	302.2	$	1,108.1

(1) Notes payable includes payments for the principal and estimated interest expense on our surplus notes outstanding based on LIBOR plus a margin. The interest rates used ranged from 6.4% to 6.6%.

(2) Estimated losses and LAE reserve payment patterns have been computed based on historical information. Our calculation of loss and LAE reserve payments by period is subject to the same uncertainties associated with determining the level of reserves and to the additional uncertainties arising from the difficulty of predicting when claims (including claims that have not yet been reported to us) will be paid. Actual payments of losses and LAE by period will vary, perhaps materially, from the above table to the extent that current estimates of losses and LAE reserves vary from actual ultimate claims amounts due to variations between expected and actual payout patterns.

(3) The unpaid losses and LAE reserves are presented gross of reinsurance recoverables for unpaid losses, which were as follows for each of the periods presented above:

	Recoveries Due By Period
	Total			Less Than 1-Year			1-3 Years			4-5 Years			More Than 5 Years
	(in millions)
Reinsurance recoverables on unpaid losses and LAE	$	(512.5	)	$	(27.8	)	$	(52.7	)	$	(49.6	)	$	(382.4	)

Investments

Our investment portfolio is structured to support our need for: (i) optimizing our risk-adjusted total return; (ii) providing adequate liquidity; (iii) facilitating financial strength and stability; and (iv) ensuring regulatory and legal compliance.

As of June 30, 2018, the total amortized cost of our investments recorded at fair value was $2,531.5 million and its fair value was $2,598.9 million. These investments provide a steady source of income, which may fluctuate with changes in interest rates and our current investment strategies.

We also have a $6.4 million investment in FHLB stock which we record at cost. We receive periodic dividends from the FHLB for this investment, when declared, which can vary from period to period.

As of June 30, 2018, our investment portfolio consisted of 92% fixed maturity securities. We strive to limit interest rate risk associated with fixed maturity investments by managing the duration of these securities. Our fixed maturity securities (excluding cash and cash equivalents) had a duration of 4.4 at June 30, 2018. To minimize interest rate risk, our portfolio is weighted toward short-term and intermediate-term bonds; however, our investment strategy balances consideration of duration, yield, and credit risk. Our investment guidelines require that the minimum weighted average quality of our fixed maturity securities portfolio be "A+," using ratings assigned by Standard & Poor's (S&P). Our fixed maturity securities portfolio had a weighted average quality of "AA-" as of June 30, 2018, with 54.5% of the portfolio rated "AA" or better, based on market value. Other securities within fixed maturity securities consist of bank loans, which are classified as AFS and are reported at fair value.

We also have a portfolio of equity securities. We strive to limit the exposure to equity price risk associated with equity securities by diversifying our holdings across several industry sectors. Equity securities represented 8% of our investment portfolio at June 30, 2018.

We believe that our current asset allocation meets our strategy to preserve capital for claims and policy liabilities and to provide sufficient capital resources to support and grow our ongoing insurance operations.

28

The following table shows the estimated fair value, the percentage of the fair value to total invested assets at fair value, the average book yield, and the average tax equivalent yield (each based on the book value of each category of invested assets) as of June 30, 2018.

Category	Estimated Fair Value		Percentage of Total		Book Yield		Tax Equivalent Yield (1)
	(in millions, except percentages)
U.S. Treasuries	$	119.4	4.6	%	2.0	%	2.0	%
U.S. Agencies	11.5		0.4		4.3		4.3
States and municipalities	568.7		21.9		3.4		3.9
Corporate securities	1,079.5		41.5		3.2		3.2
Residential mortgage-backed securities	433.1		16.7		3.1		3.1
Commercial mortgage-backed securities	104.0		4.0		2.9		2.9
Asset-backed securities	67.3		2.6		3.2		3.2
Other securities	17.7		0.7		4.1		4.1
Equity securities	197.7		7.6		5.5		6.0
Total investments at fair value	$	2,598.9	100.0	%
Weighted average yield					3.3	%	3.4	%
(1) Computed using a statutory income tax rate of 21%

The following table shows the percentage of total estimated fair value of our fixed maturity securities as of June 30, 2018 by credit rating category, using the lower of ratings assigned by Moody's Investors Service or S&P.

Rating	Percentage of Total Estimated Fair Value
“AAA”	8.8	%
“AA”	45.7
“A”	33.0
“BBB”	12.1
Below investment grade	0.4
Total	100.0	%

Investments that we currently own could be subject to default by the issuer or could suffer declines in fair value that become other-than-temporary. We regularly assess individual securities as part of our ongoing portfolio management, including the identification of other-than-temporary declines in fair value. Our other-than-temporary impairment assessment includes reviewing the extent and duration of declines in fair value of investments below amortized cost, historical and projected financial performance and near-term prospects of the issuer, the outlook for industry sectors, credit rating, and macro-economic changes. We also make a determination as to whether it is not more likely than not that we will be required to sell the security before its fair value recovers above cost, or maturity.

We believe that we have appropriately identified the declines in the fair values of our unrealized losses for the six months ended June 30, 2018. We recognized impairments on fixed maturity securities of $2.0 million (consisting of 57 securities) during the six months ended June 30, 2018 as a result of our intent to sell those securities. We determined that the remaining unrealized losses on fixed maturity securities were primarily the result of prevailing interest rates and not the credit quality of the issuers. The fixed maturity securities whose fair value was less than amortized cost were not determined to be other-than-temporarily impaired given the severity and duration of the impairment, the credit quality of the issuers, our intent to not sell the securities, and a determination that it is not more likely than not that we will be required to sell the securities at an amount less than its amortized cost.

Off-Balance Sheet Arrangements

We currently have operating leases that constitute off-balance sheet arrangements. Our operating lease obligations are provided under "Capital Resources" in Liquidity and Capital Resources.

Critical Accounting Policies

The unaudited interim consolidated financial statements included in this quarterly report include amounts based on the use of estimates and judgments of management for those transactions that are not yet complete. We believe that the estimates and judgments that were most critical to the preparation of the consolidated financial statements involved the following: (a) reserves for losses and LAE; (b) reinsurance recoverables; (c) recognition of premium income; (d) deferred income taxes; and (e) valuation of investments. These estimates and judgments require the use of assumptions about matters that are highly uncertain and therefore

29

are subject to change as facts and circumstances develop. Our accounting policies are discussed under "Critical Accounting Policies" in Management's Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

Market risk is the risk of potential economic loss principally arising from adverse changes in the fair value of financial instruments. The major components of market risk affecting us are credit risk, interest rate risk, and equity price risk, and are described in detail in our Annual Report on Form 10-K. We have not experienced any material changes in market risk since December 31, 2017.

The primary market risk exposure to our investment portfolio, which consists primarily of fixed maturity securities, is interest rate risk. We have the ability to hold fixed maturity securities to maturity and we strive to limit interest rate risk by managing duration. As of June 30, 2018, our fixed maturity securities portfolio had a duration of 4.4. We continually monitor the impact of interest rate changes on our investment portfolio and liquidity obligations. Changes to our market risk, if any, since December 31, 2017 are reflected in Management’s Discussion and Analysis of Financial Condition and Results of Operations and the financial statements contained in this Form 10-Q.

Item 4.  Controls and Procedures

Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we have evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (Exchange Act)) as of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this report.

There have not been any changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

30

PART II – OTHER INFORMATION

Item 1.  Legal Proceedings

From time-to-time, the Company is involved in pending and threatened litigation in the normal course of business in which claims for monetary damages are asserted. In the opinion of management, the ultimate liability, if any, arising from such pending or threatened litigation is not expected to have a material effect on our results of operations, liquidity, or financial position.

Item 1A.  Risk Factors

We have disclosed in our Annual Report the most significant risk factors that can impact year-to-year comparisons and that may affect the future performance of the Company’s business. On a quarterly basis, we review these disclosures and update the risk factors, as appropriate. As of the date of this report, there have been no material changes to the risk factors contained in our Annual Report.

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

The following table provides information with respect to the Company's repurchases of its common stock during the second quarter of 2018:

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Shares that May Yet be Purchased Under the Program
					(in millions)
April 1 – April 30, 2018	—	$	—	—	$	50.0
May 1 – May 31, 2018	6,227	39.71		6,227	49.8
June 1 – June 30, 2018	3,570	39.86		3,570	49.6
Total	9,797	$	39.77	9,797

On February 21, 2018, the Board of Directors authorized the 2018 Program. The 2018 Program provides that shares may be purchased at prevailing market prices from February 26, 2018 through February 26, 2020 through a variety of methods, including open market or private transactions, in accordance with applicable laws and regulations and as determined by management. The timing and actual number of shares that may be repurchased will depend on a variety of factors, including the share price, corporate and regulatory requirements, and other market and economic conditions. Repurchases under the 2018 Program may be commenced, modified, or suspended from time to time without prior notice, and the program may be suspended or discontinued at any time.

Item 3.  Defaults Upon Senior Securities

None.

Item 4.  Mine Safety Disclosures

Not applicable.

Item 5.  Other Information

None.

31

Item 6.  Exhibits

			Incorporated by Reference Herein
Exhibit No.	Description of Exhibit	Included Herewith	Form	File No.	Exhibit	Filing Date
*10.1	Restricted Stock Unit Agreement by and between Employers Holdings, Inc. and Lenard T. Ormsby, dated and effective March 7, 2018		8-K	001-33245	10.1	March 13, 2018
*10.2	Performance Share Agreement by and between Employers Holdings, Inc. and Lenard T. Ormsby, dated and effective March 7, 2018		8-K	001-33245	10.2	March 13, 2018
*10.3	Notice to Renew Employment Agreement by and between Employers Holdings, Inc. and Douglas D. Dirks, dated May 11, 2012 and the renewal term effective January 1, 2019.		8-K	001-33245		May 29, 2018
*10.4	Notice to Renew Employment Agreement by and between Employers Holdings, Inc. and Michael S. Paquette, dated December 16, 2018 and effective January 1, 2019.		8-K	001-33245		May 29, 2018
10.5	Confirmation of Irrevocable Letter of Credit No. 2018-08 between EAC and FHLB SF, dated March 9, 2018		8-K	001-33245	10.1	March 15, 2018
10.6	Confirmation of Irrevocable Letter of Credit No. 2018-09 between ECIC and FHLB SF, dated March 9, 2018		8-K	001-33245	10.2	March 15, 2018
10.7	Confirmation of Irrevocable Letter of Credit No. 2018-10 between EPIC and FHLB SF, dated March 9, 2018		8-K	001-33245	10.3	March 15, 2018
10.8	Form of Letter of Credit and Reimbursement Agreement		8-K	001-33245	10.4	March 15, 2018
10.9	Amended and Restated Stock Purchase Agreement among Partner Reinsurance Company of the U.S., Cerity Group, Inc. and Employers Holdings, Inc. (solely in its capacity as Guarantor) dated as of May 23, 2018		8-K/A	001-33245	10.1	May 24, 2018
10.10	Amended and Restated Bylaws of Employers Holdings, Inc.		8-K	001-33245	3.1	June 13, 2018
31.1	Certification of Douglas D. Dirks Pursuant to Section 302	X
31.2	Certification of Michael S. Paquette Pursuant to Section 302	X
32.1	Certification of Douglas D. Dirks Pursuant to Section 906	X
32.2	Certification of Michael S. Paquette Pursuant to Section 906	X
101.INS	XBRL Instance Document	X
101.SCH	XBRL Taxonomy Extension Schema Document	X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document	X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document	X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document	X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document	X

—————

*Represents management contracts and compensatory plans or arrangements.

32

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.

EMPLOYERS HOLDINGS, INC.

Date:	July 26, 2018	/s/ Michael S. Paquette
		Michael S. Paquette
		Executive Vice President and Chief Financial Officer
		Employers Holdings, Inc.
		(Principal Financial and Accounting Officer)

33

EX-31.1

41Exhibit 31.1

CERTIFICATIONS

I, Douglas D. Dirks, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Employers Holdings, Inc.;

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 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;

5. The registrant's other certifying officer 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:	July 26, 2018	/s/ Douglas D. Dirks
		Douglas D. Dirks
		President and Chief Executive Officer
		Employers Holdings, Inc.

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Michael S. Paquette, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Employers Holdings, Inc.;

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 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;

5. The registrant's other certifying officer 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:	July 26, 2018	/s/ Michael S. Paquette
		Michael S. Paquette
		Executive Vice President and Chief Financial Officer
		Employers Holdings, Inc.
		(Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

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 Form 10-Q of Employers Holdings, Inc. (the Company) for the quarter ended June 30, 2018, as filed with the Securities and Exchange Commission on the date hereof (the Report), the undersigned hereby, certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(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.

Date:	July 26, 2018	/s/ Douglas D. Dirks
		Douglas D. Dirks
		President and Chief Executive Officer
		Employers Holdings, Inc.

EX-32.2

Exhibit 32.2

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 Form 10-Q of Employers Holdings, Inc. (the Company) for the quarter ended June 30, 2018, as filed with the Securities and Exchange Commission on the date hereof (the Report), the undersigned hereby, certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(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.

Date:	July 26, 2018	/s/ Michael S. Paquette
		Michael S. Paquette
		Executive Vice President and Chief Financial Officer
		Employers Holdings, Inc.
		(Principal Financial and Accounting Officer)

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 19, 2018
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Entity Registrant Name	Employers Holdings, Inc.
Entity Central Index Key	0001379041
Current Fiscal Year End Date	--12-31
Entity Well Know Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock Shares Outstanding		32,759,375
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investments:
Fixed maturity securities at fair value (amortized cost $2,418.0 at June 30, 2018 and $2,421.0 at December 31, 2017)	$ 2,401,200	$ 2,463,400
Equity securities at fair value (cost $113.3 at March 31, 2018)	197,700
Equity securities, AFS, at fair value (cost $116.7 at December 31, 2017)		210,300
Equity securities at cost	6,400	0
Short-term investments at fair value (amortized cost $4.0 at December 31, 2017)	0	4,000
Total investments	2,605,300	2,677,700
Cash and cash equivalents	146,300	73,300
Restricted cash and cash equivalents	1,000	1,000
Accrued investment income	18,600	19,600
Premiums receivable (less bad debt allowance of $7.5 at June 30, 2018 and $10.0 at December 31, 2017)	355,600	326,700
Reinsurance recoverable for:
Paid losses	7,600	7,200
Unpaid losses	512,500	537,000
Deferred policy acquisition costs	51,700	45,800
Deferred income taxes, net	24,400	28,700
Property and equipment, net	20,300	13,900
Intangible assets, net	7,800	7,900
Goodwill	36,200	36,200
Contingent commission receivable—LPT Agreement	32,000	31,400
Other assets	49,200	33,700
Total assets	3,868,500	3,840,100
Claims and policy liabilities:
Unpaid losses and loss adjustment expenses	2,227,900	2,266,100
Unearned premiums	360,200	318,300
Total claims and policy liabilities	2,588,100	2,584,400
Commissions and premium taxes payable	58,900	55,300
Accounts payable and accrued expenses	23,400	23,700
Deferred reinsurance gain—LPT Agreement	154,700	163,600
Notes payable	20,000	20,000
Other liabilities	66,900	45,400
Total liabilities	2,912,000	2,892,400
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value; 150,000,000 shares authorized; 56,866,727 and 56,695,174 shares issued and 32,759,575 and 32,597,819 shares outstanding at June 30, 2018 and December 31, 2017, respectively	600	600
Preferred stock, $0.01 par value; 25,000,000 shares authorized; none issued	0	0
Additional paid-in capital	382,400	381,200
Retained earnings	970,800	842,200
Accumulated other comprehensive (loss) income, net of tax	(13,300)	107,400
Treasury stock, at cost (24,107,152 shares at June 30, 2018 and 24,097,355 shares at December 31, 2017)	(384,000)	(383,700)
Total liabilities and stockholders’ equity	956,500	947,700
Total liabilities and stockholders’ equity	$ 3,868,500	$ 3,840,100

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Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Available for sale:
Amortized cost	$ 2,418,000	$ 2,541,700
Equity securities at fair value, cost	113,500
Available for sale, short-term investments, at amortized cost	0	4,000
Premiums receivable, bad debt allowance	7,500	10,000
Reinsurance Recoverables on Unpaid Losses, Allowance	$ 0	$ 0
Stockholders' equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	56,866,727	56,695,174
Common stock, shares outstanding (in shares)	32,759,575	32,597,819
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	25,000,000	25,000,000
Preferred stock, shares issued (in shares)	0	0
Treasury stock, at cost (in shares)	24,107,152	24,097,355
Debt Securities [Member]
Available for sale:
Amortized cost	$ 2,418,000	$ 2,421,000
Equity Securities [Member]
Available for sale:
Amortized cost		116,700
Short-term Investments [Member]
Available for sale:
Amortized cost		$ 4,000

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Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Net premiums earned	$ 178,000	$ 171,700	$ 354,600	$ 347,100
Net investment income	20,300	18,200	39,700	36,900
Net realized and unrealized (losses) gains on investments	5,700	1,100	(2,400)	3,300
Net realized (losses) gains on investments	5,700	1,100		3,300
Gain on redemption of notes payable	0	2,100	0	2,100
Other income	100	100	100	100
Total revenues	204,100	193,200	392,000	389,500
Expenses
Losses and loss adjustment expenses	87,800	106,100	183,200	215,000
Commission expense	24,500	21,500	48,200	43,000
Underwriting and other operating expenses	40,100	32,600	79,200	68,600
Interest and financing expenses	400	400	700	800
Total expenses	152,800	160,600	311,300	327,400
Net income before income taxes	51,300	32,600	80,700	62,100
Income tax expense	8,800	7,800	12,600	14,100
Net income	42,500	24,800	68,100	48,000
Comprehensive income
Unrealized AFS investment (losses) gains arising during the period (net of taxes of $(3.0) and $4.5 for the three months ended June 30, 2018 and 2017, respectively, and $(12.6) and $9.7 for the six months ended June 30, 2018 and 2017, respectively)	(11,300)	8,400	(47,100)	17,900
Reclassification adjustment for realized AFS investment losses (gains) in net income (net of taxes of $(0.4) for the three months ended June 30, 2017, and $0.1 and $(1.2) for the six months ended June 30, 2018 and 2017, respectively)	0	(700)	400	(2,100)
Other comprehensive (loss) income, net of tax	(11,300)	7,700	(46,700)	15,800
Total comprehensive income	31,200	32,500	21,400	63,800
Net realized and unrealized gains (losses) on investments
Net realized and unrealized gains (losses) on investments before impairments	5,700	1,100	(400)	3,500
Other than temporary impairment recognized in earnings	0	0	(2,000)	(200)
Net realized and unrealized (losses) gains on investments	5,700	1,100	$ (2,400)	3,300
Net realized (losses) gains on investments	$ 5,700	$ 1,100		$ 3,300
Earnings per common share (Note 12):
Basic	$ 1.29	$ 0.76	$ 2.07	$ 1.48
Diluted	1.28	0.75	2.05	1.46
Cash dividends declared per common share and eligible RSUs and PSUs	$ 0.20	$ 0.15	$ 0.40	$ 0.30

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Conolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement Parenthetical [Abstract]
Other comprehensive income (loss), unrealized holding gain (loss) on securities arising during period, tax	$ (3,000)	$ 4,500	$ (12,600)	$ 9,700
Other comprehensive income (loss), reclassification adjustment for sale of securities included in net income, tax	$ 0	$ 400	$ (100)	$ 1,200

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Consolidated Statements of Stockholders Equity Statement - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income, Net	Treasury Stock [Member]
Stockholders' equity, shares at Dec. 31, 2016		56,226,277
Stockholders' equity, value at Dec. 31, 2016	$ 840,600	$ 600	$ 372,000	$ 777,200	$ 74,500	$ (383,700)
Stock-based obligations, shares		0
Stock-based obligations, value	$ 3,200	$ 0	3,200	0	0	0
Stock-options exercised, shares	167,026	167,026
Stock-options exercised, value	$ 3,300	$ 0	3,300	0	0	0
Vesting of RSUs and PSUs, net of shares withheld to satisfy minimum tax withholding, shares		117,049
Vesting of RSUs and PSUs, net of shares withheld to satisfy minimum tax withholding, value	(1,900)	$ 0	(1,900)	0	0	0
Dividends declared, shares		0
Dividends declared, value	(9,800)	$ 0	0	(9,800)	0	0
Net income	48,000	0	0	48,000	0	0
Change in net unrealized gains in investments, net of tax	15,800	$ 0	0	0	15,800	0
Stockholders' equity, shares at Jun. 30, 2017		56,510,352
Stockholders' equity, value at Jun. 30, 2017	899,200	$ 600	376,600	815,400	90,300	(383,700)
Stockholders' equity, shares at Dec. 31, 2016		56,226,277
Stockholders' equity, value at Dec. 31, 2016	$ 840,600	$ 600	372,000	777,200	74,500	(383,700)
Stock-options exercised, shares	307,076
Stockholders' equity, shares at Dec. 31, 2017	56,695,174	56,695,174
Stockholders' equity, value at Dec. 31, 2017	$ 947,700	$ 600	381,200	842,200	107,400	(383,700)
Stock-based obligations, shares		0
Stock-based obligations, value	$ 3,900	$ 0	3,900	0	0	0
Stock-options exercised, shares	13,800	13,800
Stock-options exercised, value	$ 200	$ 0	200	0	0	0
Vesting of RSUs and PSUs, net of shares withheld to satisfy minimum tax withholding, shares		157,753
Vesting of RSUs and PSUs, net of shares withheld to satisfy minimum tax withholding, value	(2,900)	$ 0	(2,900)	0	0	0
Acquisition of common stock, shares		0
Acquisition of common stock, value	(300)	$ 0	0	0	0	(300)
Dividends declared, shares		0
Dividends declared, value	(13,300)	$ 0	0	(13,300)	0	0
Net income	68,100	0	0	68,100	0	0
Change in net unrealized gains in investments, net of tax	$ (46,700)	$ 0	0	0	(46,700)	0
Stockholders' equity, shares at Jun. 30, 2018	56,866,727	56,866,727
Stockholders' equity, value at Jun. 30, 2018	$ 956,500	$ 600	382,400	970,800	(13,300)	(384,000)
Reclassification adjustment for adoption of ASU | Accounting Standards Update 2016-01 [Member]	$ 0	$ 0	$ 0	$ 74,000	$ (74,000)	$ 0

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Conslidated Stockholders Equity (Parentheticals) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity Parenthetical [Abstract]
Change in net unrealized (losses) gains on investments, net of tax	$ (12.5)	$ 8.5

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income	$ 68,100	$ 48,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,800	4,200
Stock-based compensation	3,800	3,100
Amortization of premium on investments, net	4,400	7,500
Allowance for doubtful accounts	(2,500)	100
Deferred income tax (benefit) expense	16,800	6,000
Net realized and unrealized losses (gains) on investments	2,400	(3,300)
Gain on redemption of notes payable	0	(2,100)
Change in operating assets and liabilities:
Premiums receivable	(26,500)	(28,500)
Reinsurance recoverable on paid and unpaid losses	24,100	20,500
Current federal income taxes	(7,100)	(6,900)
Unpaid losses and loss adjustment expenses	38,200	16,100
Unearned premiums	41,900	30,800
Accounts payable, accrued expenses and other liabilities	4,000	(7,100)
Deferred reinsurance gain—LPT Agreement	(8,900)	(6,000)
Other	100	(7,600)
Net cash provided by operating activities	86,200	42,600
Investing activities
Purchases of fixed maturity securities	(358,100)	(202,100)
Purchases of equity securities	(19,900)	(10,700)
Purchases of short-term investments	(34,900)	(8,100)
Proceeds from sale of fixed maturity securities	168,400	43,000
Proceeds from sale of equity securities	24,000	11,400
Proceeds from maturities and redemptions of fixed maturity securities	187,700	96,800
Proceeds from maturities of short-term investments	38,900	18,600
Net change in unsettled investment purchases and sales	7,200	5,000
Capital expenditures and other	(10,100)	(5,900)
Net cash provided by (used in) investing activities	3,200	(52,000)
Financing activities
Acquisition of common stock	(300)	0
Cash transactions related to stock-based compensation	(2,700)	1,400
Dividends paid to stockholders	(13,300)	(9,800)
Redemption of notes payable	0	(9,900)
Payments on capital leases	100	100
Net cash used in financing activities	(16,400)	(18,400)
Net increase (decrease) in cash, cash equivalents and restricted cash	73,000	(27,800)
Cash, cash equivalents, restricted cash and restricted cash equivalents at the beginning of the period	74,300	70,800
Cash, cash equivalents, restricted cash and restricted cash equivalents at the end of the period	147,300	43,000
Total cash, cash equivalents, restricted cash	$ 74,300	$ 70,800

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Basis of Presentation

6 Months Ended

Jun. 30, 2018

Basis of Presentation [Abstract]

Basis of Presentation

Basis of Presentation and Summary of Operations

Employers Holdings, Inc. (EHI) is a Nevada holding company. Through its wholly owned insurance subsidiaries, Employers Insurance Company of Nevada (EICN), Employers Compensation Insurance Company (ECIC), Employers Preferred Insurance Company (EPIC), and Employers Assurance Company (EAC), EHI is engaged in the commercial property and casualty insurance industry, specializing in workers' compensation products and services. Unless otherwise indicated, all references to the “Company” refer to EHI, together with its subsidiaries.

In 1999, the Nevada State Industrial Insurance System (the Fund) entered into a retroactive 100% quota share reinsurance agreement (the LPT Agreement) through a loss portfolio transfer transaction with third party reinsurers. The LPT Agreement commenced on June 30, 1999 and will remain in effect until all claims under the covered policies have closed, the LPT Agreement is commuted or terminated, upon the mutual agreement of the parties, or the reinsurers' aggregate maximum limit of liability is exhausted, whichever occurs first. The LPT Agreement does not provide for any additional termination terms. On January 1, 2000, EICN assumed all of the assets, liabilities and operations of the Fund, including the Fund's rights and obligations associated with the LPT Agreement (See Note 8).

The Company accounts for the LPT Agreement as retroactive reinsurance. Upon entry into the LPT Agreement, an initial deferred reinsurance gain (the Deferred Gain) was recorded as a liability on the Company’s Consolidated Balance Sheets. The Company is entitled to receive a contingent profit commission under the LPT Agreement. The contingent profit commission is estimated based on both actual paid results to date and projections of expected paid losses under the LPT Agreement and is recorded as an asset on the Company's Consolidated Balance Sheets.

The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal, recurring adjustments) necessary for a fair presentation of the Company’s consolidated financial position and results of operations for the periods presented have been included. The results of operations for an interim period are not necessarily indicative of the results for an entire year. These financial statements have been prepared consistent with the accounting policies described in the Company’s Form 10-K for the year ended December 31, 2017 (Annual Report).

The Company operates as a single operating segment, workers' compensation insurance, through its wholly owned subsidiaries. The Company considers an operating segment to be any component of its business whose operating results are regularly reviewed by the Company’s chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance based on discrete financial information.

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. As a result, actual results could differ from these estimates. The most significant areas that require management judgment are the estimate of unpaid losses and loss adjustment expenses (LAE), evaluation of reinsurance recoverables, recognition of premium revenue, recoverability of deferred income taxes, and valuation of investments.

Reclassifications

Certain prior period information has been reclassified to conform to the current period presentation.

Pending Acquisition

On August 11, 2017, the Company entered into, and on May 23, 2018, the Company amended, a stock purchase agreement (Purchase Agreement) with Partner Reinsurance Company of the U.S. (PRUS) with respect to the acquisition (Acquisition) of all of the outstanding shares of capital stock of PartnerRe Insurance Company of New York (PRNY). The purchase price is equal to the sum of: (i) the amount of statutory capital and surplus of PRNY at closing (which is currently estimated to be approximately $40.0 million); and (ii) $5.8 million. The Company expects to fund the Acquisition with cash on hand.

Pursuant to the Purchase Agreement, all liabilities and obligations of PRNY existing as of the closing date, whether known or unknown, will be indemnified by PRUS. In addition, PartnerRe Ltd., the parent company of PRUS, has provided the Company with a Guaranty that unconditionally, absolutely and irrevocably guarantees the full and prompt payment and performance by PRUS of all of its obligations, liabilities, and indemnities under the Purchase Agreement and the transactions contemplated thereby.

The Company will not be acquiring any employees or ongoing business operations pursuant to the Acquisition. The Acquisition is subject to certain closing conditions, including, among other things, approval from the Department of Financial Services of the State of New York.

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Changes in Estimates Level 1 (Notes)

6 Months Ended

Jun. 30, 2018

Changes in Estimates [Abstract]

Change in Estimates

Change in Estimates

The Company reduced its estimated loss and LAE reserves ceded under the Loss Portfolio Transfer Agreement (LPT Reserve Adjustment) as a result of the determination that an adjustment was necessary to reflect observed favorable paid loss trends during the second quarter of 2018. The following table shows the financial statement impact related to the LPT Reserve Adjustment.

	Three Months Ended			Six Months Ended
	June 30, 2018			June 30, 2018
	(in millions, except per share data)
LPT Reserve Adjustment	$	(6.3	)	$	(6.3	)
Cumulative adjustment to the Deferred Gain(1)	(2.2		)	(2.2		)
Net income impact from this change in estimate	2.2			2.2
Earnings per common share impact from this change in estimate:
Basic and Diluted	0.07			0.07

(1) The cumulative adjustment to the Deferred reinsurance gain–LPT Agreement (Deferred Gain) was also recognized in losses and LAE incurred in the Company's Consolidated Statement of Comprehensive Income, so that the Deferred Gain reflects the balance that would have existed had the revised loss and LAE reserves been recognized at the inception of the LPT Agreement.

The Company increased its estimate of Contingent commission receivable – LPT Agreement (LPT Contingent Commission Adjustment) as a result of the determination that an adjustment was necessary to reflect observed favorable paid loss trends during the second quarter of 2018. The following table shows the financial statement impact related to the LPT Contingent Commission Adjustment.

	Three Months Ended		Six Months Ended
	June 30, 2018		June 30, 2018
	(in millions, except per share data)
LPT Contingent Commission Adjustment	$	0.5	$	0.5
Net income impact from this change in estimate	0.5		0.5
Earnings per common share impact from this change in estimate:
Basic and Diluted	0.02		0.02

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New Accounting Standards Level 1 (Notes)

6 Months Ended

Jun. 30, 2018

New Accounting Standards [Abstract]

New Accounting Standards

New Accounting Standards

Recently Issued Accounting Standards

In February 2016, the FASB issued ASU Number 2016-02, Leases (Topic 842). This update provides guidance on a new lease model that includes the recognition of assets and liabilities arising from lease transactions on the balance sheet. Additionally, the update provides clarity on the definition of a lease and the distinction between finance and operating leases. Furthermore, the update requires certain qualitative and quantitative disclosures pertaining to the amounts recorded in the financial statements. This update becomes effective for annual reporting periods, including interim periods within those annual periods, beginning after December 15, 2018 and early adoption is permitted. The Company has determined that the impact of this new standard will be equal to the present value of the Company's lease obligations under various non-cancellable operating lease contracts, which amounted to approximately $23.0 million at June 30, 2018, and will be recognized as lease assets and liabilities on the Company's Balance Sheets upon adoption.

Recently Adopted Accounting Standards

In March 2018, the FASB issued ASU Number 2018-05, Income Taxes (Topic 740). This update provides guidance regarding the application of ASC Topic 740 for the income tax effects of the Tax Cuts and Jobs Act. This update allowed companies to report provisional amounts of the effects of the Tax Cuts and Jobs Act in their financial statements in the first reporting period they are able to determine a reasonable estimate and any adjustments to provisional amounts should be included in income from continuing operations as an adjustment to tax expense or benefit in the reporting period the amounts are determined. The Company adopted this update in the fourth quarter of 2017 and included an estimate of the income tax effects in its financial statements for the year ended December 31, 2017. The Company does not expect the amounts of any future income tax adjustments related to the effects of the Tax Cuts and Jobs Act to be material.

In January 2016, the FASB issued ASU Number 2016-01,Financial Instruments - Overall (Subtopic 825-10). This update replaces the guidance to classify equity securities with readily determinable fair values into different categories (trading or available-for-sale) and requires those equity securities to be measured at fair value with changes in fair value recognized through net income. Additionally, this update eliminates the disclosure of the method and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost. It requires financial instruments to be measured at fair value using the exit price notion. Furthermore, this update clarifies that an evaluation of deferred tax assets related to available-for-sale securities is needed, in combination with an evaluation of other deferred tax assets, to determine if a valuation allowance is required.

This update did not apply to the Company’s investment in Federal Home Loan Bank (FHLB) stock. Rather, it specified that FHLB stock shall be carried at cost and evaluated periodically for impairment; furthermore, it specified that, beginning January 1, 2018, FHLB stock shall not be shown with securities accounted for under ASC 321, which provides detailed guidance on, among other things, accounting and reporting of investments in equity securities that have readily determinable fair values. As a result, the Company’s investment in FHLB stock is presented within Equity securities at cost on the Company's Consolidated Balance Sheet at March 31, 2018. In all periods prior to January 1, 2018, the Company's investment in FHLB stock is presented within Equity securities at fair value on the Company's Consolidated Balance Sheets.

This update became effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company adopted this update effective January 1, 2018. Adoption of this accounting standard resulted in a $74.0 million reclassification adjustment, net of tax, from accumulated other comprehensive income to retained earnings.

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Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2018

Fair Value of Financial Instruments [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments

The carrying value and the estimated fair value of the Company’s financial instruments at fair value were as follows:

	June 30, 2018				December 31, 2017
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
	(in millions)
Financial assets
Total investments at fair value	$	2,598.9	$	2,598.9	$	2,677.7	$	2,677.7
Cash and cash equivalents	146.3		146.3		73.3		73.3
Restricted cash and cash equivalents	1.0		1.0		1.0		1.0
Financial liabilities
Notes payable	$	20.0	$	23.5	$	20.0	$	23.6

Assets and liabilities recorded at fair value on the Company's Consolidated Balance Sheets are categorized based upon the levels of judgment associated with the inputs used to measure their fair value. Level inputs are defined as follows:

• Level 1 - Inputs are unadjusted quoted market prices for identical assets or liabilities in active markets at the measurement date.

• Level 2 - Inputs other than Level 1 prices that are observable for similar assets or liabilities through corroboration with market data at the measurement date.

• Level 3 - Inputs that are unobservable that reflect management's best estimate of what willing market participants would use in pricing the assets or liabilities at the measurement date.

The Company uses third party pricing services to assist it with its investment accounting function. The ultimate pricing source varies depending on the investment security and pricing service used, but investment securities valued on the basis of observable inputs (Levels 1 and 2) are generally assigned values on the basis of actual transactions. Securities valued on the basis of pricing models with significant unobservable inputs or non-binding broker quotes are classified as Level 3. The Company performs quarterly analyses on the prices it receives from third parties to determine whether the prices are reasonable estimates of fair value, including confirming the fair values of these securities through observable market prices using an alternative pricing source, as it is ultimately management’s responsibility to ensure that the fair values reflected in the Company’s consolidated financial statements are appropriate. If differences are noted in these analyses, the Company may obtain additional information from other pricing services to validate the quoted price.

The Company bases all of its estimates of fair value for assets on the bid prices, when available, as they represent what a third-party market participant would be willing to pay in an arm's length transaction.

For securities not actively traded, third party pricing services may use quoted market prices of similar instruments or discounted cash flow analyses, incorporating inputs that are currently observable in the markets for similar securities. Inputs that are often used in the valuation methodologies include, but are not limited to, broker quotes, benchmark yields, credit spreads, default rates, and prepayment speed assumptions. There were no material adjustments made to the prices obtained from third party pricing services as of June 30, 2018 and December 31, 2017.

These methods of valuation only produce an estimate of fair value if there is objectively verifiable information to produce a valuation. When objectively verifiable information is not available, the Company produces an estimate of fair value using some of the same methodologies, making assumptions for market-based inputs that are unavailable.

The Company's estimates of fair value for its notes payable are based on a combination of the variable interest rates for notes with similar durations to discount the projection of future payments on notes payable. The fair value measurements for notes payable have been determined to be Level 2 at each of the periods presented.

Each of the Company's insurance operating subsidiaries is a member of the FHLB of San Francisco. Members are required to purchase stock in FHLB in addition to maintaining collateral deposits that back any funds advanced. The Company's investment in FHLB stock is recorded at cost, as purchases and sales of these securities are at par value with the issuer. FHLB stock is considered a restricted security and is periodically evaluated by the Company for impairment based on the ultimate recovery of par value. 

The following table presents the Company's investments at fair value and the corresponding fair value measurements.

	June 30, 2018						December 31, 2017
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
	(in millions)
Fixed maturity securities:
U.S. Treasuries	$	—	$	119.4	$	—	$	—	$	137.0	$	—
U.S. Agencies	—		11.5		—		—		11.8		—
States and municipalities	—		568.7		—		—		642.5		—
Corporate securities	—		1,079.5		—		—		1,118.0		—
Residential mortgage-backed securities	—		433.1		—		—		389.3		—
Commercial mortgage-backed securities	—		104.0		—		—		106.0		—
Asset-backed securities	—		67.3		—		—		58.8		—
Other securities	—		17.7		—		—		—		—
Total fixed maturity securities	$	—	$	2,401.2	$	—	$	—	$	2,463.4	$	—
Equity securities at fair value:
Industrial and miscellaneous	$	172.6	$	—	$	—	$	181.7	$	—	$	—
Non-redeemable preferred stock (FHLB)	—		—		—		—		—		4.7
Other	25.1		—		—		23.9		—		—
Total equity securities at fair value	197.7		—		—		205.6		—		4.7
Short-term investments	—		—		—		—		4.0		—
Total investments at fair value	$	197.7	$	2,401.2	$	—	$	205.6	$	2,467.4	$	4.7

Certain cash equivalents, principally money market securities, are measured at fair value using the net asset value (NAV) per share. The following table presents cash equivalents at NAV and total cash and cash equivalents carried at fair value on the Company's Consolidated Balance Sheets.

	June 30, 2018		December 31, 2017
	(in millions)
Cash and cash equivalents at fair value	$	61.3	$	34.3
Cash equivalents measured at NAV, which approximates fair value	85.0		39.0
Total cash and cash equivalents	$	146.3	$	73.3

The following table provides a reconciliation of the beginning and ending balances of investments that are recorded at fair value and are measured using Level 3 inputs for the six months ended June 30, 2018 and 2017.

	Level 3 Securities
	2018			2017
	(in millions)
Beginning balance, January 1	$	4.7		$	11.9
Transfers out of Level 3 (1)	(4.7		)	(7.0		)
Purchases and sales, net	—			(0.2		)
Ending balance, June 30	$	—		$	4.7

(1) The transfer during the six months ended June 30, 2018 was the result of adoption of ASU 2016-01, which specified that FHLB stock shall be carried at cost and is no longer measured at fair value. Transfers during the six months ended June 30, 2017 were from Level 3 to Level 2 as observable market data became available for these securities.

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Investments

6 Months Ended

Jun. 30, 2018

Investments [Abstract]

Investments

Investments

The Company's investments in fixed maturity securities, equity securities at fair value (prior to 2018), and short-term investments are classified as available-for-sale (AFS) that are reported at fair value with unrealized gains and losses excluded from earnings and reported as a separate component of stockholders' equity, net of deferred taxes, in Accumulated other comprehensive (loss) income (AOCI) on the Company’s Consolidated Balance Sheets. Beginning in 2018, with the adoption of ASU 2016-01, the Company's investments in equity securities at fair value are no longer classified as AFS and changes in fair value are included in Net realized and unrealized (losses) gains on investments on the Company's Consolidated Statements of Comprehensive Income. Effective January 1, 2018, the Company's investment in FHLB stock is presented within Equity securities at cost on the Company's Consolidated Balance Sheets. Other securities within fixed maturity securities consist of bank loans, which are classified as AFS and are reported at fair value.

The cost or amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the Company’s AFS investments were as follows:

	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in millions)
At June 30, 2018
Fixed maturity securities
U.S. Treasuries	$	120.4	$	0.9	$	(1.9	)	$	119.4
U.S. Agencies	11.3		0.3		(0.1		)	11.5
States and municipalities	555.0		14.9		(1.2		)	568.7
Corporate securities	1,095.9		6.5		(22.9		)	1,079.5
Residential mortgage-backed securities	442.9		2.0		(11.8		)	433.1
Commercial mortgage-backed securities	107.1		—		(3.1		)	104.0
Asset-backed securities	67.6		0.2		(0.5		)	67.3
Other securities	17.8		—		(0.1		)	17.7
Total fixed maturity securities	2,418.0		24.8		(41.6		)	2,401.2
Total AFS investments	$	2,418.0	$	24.8	$	(41.6	)	$	2,401.2

At December 31, 2017
Fixed maturity securities
U.S. Treasuries	$	135.8	$	2.0	$	(0.8	)	$	137.0
U.S. Agencies	11.3		0.5		—			11.8
States and municipalities	617.0		25.5		—			642.5
Corporate securities	1,103.4		18.0		(3.4		)	1,118.0
Residential mortgage-backed securities	388.3		3.6		(2.6		)	389.3
Commercial mortgage-backed securities	106.5		0.4		(0.9		)	106.0
Asset-backed securities	58.7		0.3		(0.2		)	58.8
Total fixed maturity securities	2,421.0		50.3		(7.9		)	2,463.4
Equity securities at fair value
Industrial and miscellaneous	100.8		81.5		(0.6		)	181.7
Non-redeemable preferred stock (FHLB)	4.7		—		—			4.7
Other	11.2		12.7		—			23.9
Total equity securities at fair value	116.7		94.2		(0.6		)	210.3
Short-term investments	4.0		—		—			4.0
Total AFS investments	$	2,541.7	$	144.5	$	(8.5	)	$	2,677.7

The cost and estimated fair value of the Company’s equity securities recorded at fair value at June 30, 2018 were as follows:

	Cost		Estimated Fair Value
	(in millions)
At June 30, 2018
Equity securities at fair value
Industrial and miscellaneous	$	99.4	$	172.6
Other	14.1		25.1
Total equity securities at fair value	$	113.5	$	197.7

The amortized cost and estimated fair value of the Company's fixed maturity securities at June 30, 2018, by contractual maturity, are shown below. Expected maturities differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Estimated Fair Value
	(in millions)
Due in one year or less	$	177.8	$	178.3
Due after one year through five years	761.7		763.6
Due after five years through ten years	730.0		720.6
Due after ten years	130.9		134.3
Mortgage and asset-backed securities	617.6		604.4
Total	$	2,418.0	$	2,401.2

The following is a summary of AFS investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or greater as of June 30, 2018 and December 31, 2017.

	June 30, 2018						December 31, 2017
	Estimated Fair Value		Gross Unrealized Losses			Number of Issues	Estimated Fair Value		Gross Unrealized Losses			Number of Issues
	(in millions, except number of issues data)
Less than 12 months:
Fixed maturity securities
U.S. Treasuries	$	82.0	$	(1.6	)	27	$	86.0	$	(0.5	)	28
U.S. Agencies	3.7		(0.1		)	2	—		—			—
States and municipalities	84.0		(1.2		)	24	—		—			—
Corporate securities	811.5		(21.0		)	265	307.6		(2.3		)	113
Residential mortgage-backed securities	310.0		(8.1		)	93	165.0		(0.8		)	45
Commercial mortgage-backed securities	75.4		(2.0		)	34	41.8		(0.2		)	19
Asset-backed securities	53.1		(0.5		)	37	29.3		(0.2		)	25
Other securities	16.1		(0.1		)	23	—		—			—
Total less than 12 months	$	1,435.8	$	(34.6	)	505	$	629.7	$	(4.0	)	230
12 months or greater:
Fixed maturity securities
U.S. Treasuries	$	17.7	$	(0.3	)	9	$	23.4	$	(0.3	)	10
Corporate securities	36.1		(1.9		)	15	53.2		(1.1		)	17
Residential mortgage-backed securities	69.7		(3.7		)	32	77.1		(1.8		)	32
Commercial mortgage-backed securities	20.2		(1.1		)	8	25.1		(0.7		)	8
Total 12 months or greater	$	143.7	$	(7.0	)	64	$	178.8	$	(3.9	)	67

At December 31, 2017, the Company also had $0.6 million of gross unrealized losses on 24 equity securities that were in a continuous loss position for less than 12 months.

The Company recognized impairments on fixed maturity securities of $2.0 million (consisting of 57 securities) during the six months ended June 30, 2018 as a result of the Company's intent to sell these securities. There were no other-than-temporary impairments on fixed maturity securities recognized during the six months ended June 30, 2017. The Company determined that the remaining unrealized losses on fixed maturity securities for the six months ended June 30, 2018 were primarily the result of changes in prevailing interest rates and not the credit quality of the issuers. The fixed maturity securities whose total fair value was less than amortized cost were not determined to be other-than-temporarily impaired given the lack of severity and duration of the impairment, the credit quality of the issuers, the Company’s intent to not sell the securities, and a determination that it is not more likely than not that the Company will be required to sell the securities at an amount less than their amortized cost.

The adoption of ASU 2016-01 removed the impairment assessment for equity securities at fair value, and, beginning in 2018, changes in fair value are included in Net realized and unrealized (losses) gains on investments on the Company's Consolidated Statements of Comprehensive Income. Prior to the adoption of this standard, the Company recognized an impairment on equity securities of $0.2 million (consisting of one security) during the six months ended June 30, 2017. The other-than-temporary impairment recognized during this period was the result of the severity and duration of the change in fair value of this security. Certain unrealized losses on equity securities during the six months ended June 30, 2017 were not considered to be other-than-temporary due to the financial condition and near-term prospects of the issuers, and the Company's intent to hold the securities until fair value recovers to above cost.

Realized gains and losses on investments include the gain or loss on a security at the time of sale compared to its original or adjusted cost (equity securities) or amortized cost (fixed maturity securities). Realized losses on fixed maturity securities are also recognized when securities are written down as a result of an other-than-temporary impairment.

Net realized gains on investments and the change in unrealized gains (losses) on the Company's investments recorded at fair value are determined on a specific-identification basis and were as follows:

	Gross Realized Gains		Gross Realized Losses			Change in Net Unrealized Gains (Losses)			Changes in Fair Value Reflected in Earnings			Changes in Fair Value Reflected in AOCI, before tax
			(in millions)
Three Months Ended June 30, 2018
Fixed maturity securities	$	0.3	$	(0.3	)	$	(14.3	)	$	—		$	(14.3	)
Equity securities	2.6		(0.4		)	3.5			5.7			—
Total investments	$	2.9	$	(0.7	)	$	(10.8	)	$	5.7		$	(14.3	)
Six Months Ended June 30, 2018
Fixed maturity securities	$	2.1	$	(2.6	)	$	(59.2	)	$	(0.5	)	$	(59.2	)
Equity securities	8.1		(0.6		)	(9.4		)	(1.9		)	—
Total investments	$	10.2	$	(3.2	)	$	(68.6	)	$	(2.4	)	$	(59.2	)

Three Months Ended June 30, 2017
Fixed maturity securities	$	—	$	—		$	12.5		$	—	$	12.5
Equity securities	1.1		—			(0.7		)	1.1		(0.7		)
Total investments	$	1.1	$	—		$	11.8		$	1.1	$	11.8
Six Months Ended June 30, 2017
Fixed maturity securities	$	0.5	$	(0.1	)	$	18.9		$	0.4	$	18.9
Equity securities	3.1		(0.2		)	5.4			2.9		5.4
Total investments	$	3.6	$	(0.3	)	$	24.3		$	3.3	$	24.3

Net investment income was as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
	(in millions)
Fixed maturity securities	$	19.2		$	17.3		$	37.7		$	35.0
Equity securities	1.7			1.7			3.3			3.5
Cash equivalents and restricted cash	0.3			0.1			0.5			0.2
Gross investment income	21.2			19.1			41.5			38.7
Investment expenses	(0.9		)	(0.9		)	(1.8		)	(1.8		)
Net investment income	$	20.3		$	18.2		$	39.7		$	36.9

The Company is required by various state laws and regulations to hold securities or letters of credit in depository accounts with certain states in which it does business. These laws and regulations govern not only the amount but also the types of securities that are eligible for deposit. As of June 30, 2018 and December 31, 2017, securities having a fair value of $954.4 million and $1,009.7 million, respectively, were on deposit. Additionally, standby letters of credit from the FHLB were in place in lieu of $140.0 million of securities on deposit as of June 30, 2018 (See Note 9).

Certain reinsurance contracts require the Company's funds to be held in trust for the benefit of the ceding reinsurer to secure the outstanding liabilities assumed by the Company. The fair value of fixed maturity securities and restricted cash and cash equivalents held in trust for the benefit of ceding reinsurers at June 30, 2018 and December 31, 2017 was $22.9 million and $24.5 million, respectively.

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Income Taxes

6 Months Ended

Jun. 30, 2018

Income Taxes [Abstract]

Income Taxes

Income Taxes

Income tax expense for interim periods is measured using an estimated effective tax rate for the annual period. The Company's effective tax rates were 17.2% and 15.6% for the three and six months ended June 30, 2018, respectively, compared to 23.9% and 22.7% for the same periods of 2017. Tax-advantaged investment income, Deferred Gain amortization, LPT Reserve Adjustments, LPT Contingent Commission Adjustments, and certain other adjustments reduced the Company's effective income tax rate below the U.S. statutory rates of 21% and 35% for periods in 2018 and 2017, respectively.

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Liability for Unpaid Losses and Loss Adjustment Expenses

6 Months Ended

Jun. 30, 2018

Liability for Unpaid Losses and Loss Adjustment Expenses [Abstract]

Liability for Unpaid Losses and Loss Adjustment Expenses

Liability for Unpaid Losses and Loss Adjustment Expenses

The following table represents a reconciliation of changes in the liability for unpaid losses and LAE.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
	(in millions)
Unpaid losses and LAE at beginning of period	$	2,258.1		$	2,298.2		$	2,266.1		$	2,301.0
Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	531.1			572.9			537.0			580.0
Net unpaid losses and LAE at beginning of period	1,727.0			1,725.3			1,729.1			1,721.0
Losses and LAE, net of reinsurance, incurred during the period related to:
Current period	111.2			109.4			221.6			221.3
Prior periods	(16.5		)	(0.3		)	(28.9		)	(0.3		)
Total net losses and LAE incurred during the period	94.7			109.1			192.7			221.0
Paid losses and LAE, net of reinsurance, related to:
Current period	20.0			17.0			25.9			21.7
Prior periods	86.3			92.3			180.5			195.2
Total net paid losses and LAE during the period	106.3			109.3			206.4			216.9
Ending unpaid losses and LAE, net of reinsurance	1,715.4			1,725.1			1,715.4			1,725.1
Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	512.5			559.8			512.5			559.8
Unpaid losses and LAE at end of period	$	2,227.9		$	2,284.9		$	2,227.9		$	2,284.9

Total net losses and LAE included in the above table exclude amortization of the deferred reinsurance gain—LPT Agreement, LPT Reserve Adjustments, and LPT Contingent Commission Adjustments, which totaled $6.9 million and $3.1 million for the three months ended June 30, 2018 and 2017, respectively, and $9.5 million and $6.0 million for the six months ended June 30, 2018 and 2017, respectively (See Note 8).

The change in incurred losses and LAE attributable to prior periods included $16.5 million and $28.5 million of favorable development on the Company's voluntary risk business for the three and six months ended June 30, 2018, respectively, and $0.4 million of favorable development on the Company's assigned risk business for the six months ended June 30, 2018.

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LPT Agreement

6 Months Ended

Jun. 30, 2018

LPT Agreement [Abstract]

LPT Agreement

LPT Agreement

The Company is party to the LPT Agreement under which $1.5 billion in liabilities for losses and LAE related to claims incurred by the Fund prior to July 1, 1995 were reinsured for consideration of $775.0 million. The LPT Agreement provides coverage up to $2.0 billion. The Company records its estimate of contingent profit commission in the accompanying Consolidated Balance Sheets as Contingent commission receivable–LPT Agreement and a corresponding liability is recorded in the accompanying Consolidated Balance Sheets in Deferred reinsurance gain–LPT Agreement. The Deferred Gain is being amortized using the recovery method. Amortization is determined by the proportion of actual reinsurance recoveries to total estimated recoveries over the life of the LPT Agreement, except for the contingent profit commission, which is amortized through June 30, 2024, the date through which the Company is entitled to receive a contingent profit commission under the LPT Agreement. The amortization is recorded in losses and LAE incurred in the accompanying consolidated statements of comprehensive income. Any adjustments to the Deferred Gain are recorded in losses and LAE incurred in the accompanying consolidated statements of comprehensive income.

The Company amortized $4.2 million and $3.1 million of the Deferred Gain for the three months ended June 30, 2018 and 2017, respectively, and $6.8 million and $6.0 million for the six months ended June 30, 2018 and 2017, respectively. Additionally, the Deferred Gain was further reduced by $2.2 million for the three and six months ended June 30, 2018 due to a favorable LPT Reserve Adjustment and by $0.5 million of amortization for the three and six months ended June 30, 2018 due to a favorable LPT Contingent Commission Adjustment (see Note 2). The remaining Deferred Gain was $154.7 million and $163.6 million as of June 30, 2018 and December 31, 2017, respectively. The estimated remaining liabilities subject to the LPT Agreement were $420.3 million and $438.9 million as of June 30, 2018 and December 31, 2017, respectively. Losses and LAE paid with respect to the LPT Agreement totaled $761.6 million and $749.3 million from inception through June 30, 2018 and December 31, 2017, respectively.

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Notes Payable Level 1 (Notes)

6 Months Ended

Jun. 30, 2018

Notes Payable [Abstract]

Debt Disclosure [Text Block]

Notes Payable and Other Financing Arrangements

Notes payable is comprised of the following:

	June 30, 2018		December 31, 2017
	(in millions)
Dekania Surplus Note, due April 29, 2034	$	10.0	$	10.0
Alesco Surplus Note, due December 15, 2034	10.0		10.0
Total	$	20.0	$	20.0

EPIC has a $10.0 million surplus note to Dekania CDO II, Ltd. issued as part of a pooled transaction. The note matures in 2034 and became callable by the Company in 2009. The terms of the note provide for quarterly interest payments at a rate 425 basis points in excess of the 90-day LIBOR. Both the payment of interest and repayment of the principal under this note and the surplus note described in the following paragraph are subject to the prior approval of the Florida Department of Financial Services.

EPIC has a $10.0 million surplus note to Alesco Preferred Funding V, LTD issued as part of a pooled transaction. The note matures in 2034 and became callable by the Company in 2009. The terms of the note provide for quarterly interest payments at a rate 405 basis points in excess of the 90-day LIBOR.

Other financing arrangements is comprised of the following:

Each of the Company's insurance subsidiaries is a member of the FHLB. Membership allows the insurance subsidiaries access to collateralized advances, which may be used to support and enhance liquidity management. The amount of advances that may be taken is dependent on statutory admitted assets on a per company basis. Currently, none of the Company's insurance subsidiaries has advances outstanding under the FHLB facility.

FHLB membership also allows the Company's insurance subsidiaries access to standby letters of credit. On March 9, 2018, ECIC, EPIC, and EAC entered into standby Letter of Credit Reimbursement Agreements (Letter of Credit Agreements) with the FHLB. The Letter of Credit Agreements are between FHLB and each of EAC, in the amount of $40.0 million, ECIC, in the amount of $50.0 million, and EPIC, in the amount of $50.0 million. The Letter of Credit Agreements became effective March 9, 2018 and expire March 31, 2019; however, the Letter of Credit Agreements will remain evergreen with automatic one-year extensions unless the FHLB notifies the beneficiary at least 60 days prior to the then applicable expiration date of its election not to renew. The Letter of Credit Agreements may only be used to satisfy, in whole or in part, insurance deposit requirements with the State of California and are fully secured with eligible collateral at all times. The Letter of Credit Agreements are subject to annual maintenance charges and a fee of 15 basis points on issued amounts. As of June 30, 2018, letters of credit totaling $140.0 million were issued in lieu of securities on deposit with the State of California under these Letter of Credit Agreements.

As of June 30, 2018, investment securities having a fair value of $258.7 million were pledged to FHLB by the Company's insurance subsidiaries in support of the collateralized advance facility and the Letter of Credit Agreements.

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Accumulated Other Comprehensive Income

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income [Abstract]

Accumulated Other Comprehensive Income, Net

Accumulated Other Comprehensive Income

Accumulated other comprehensive income is comprised of unrealized (losses) gains on investments classified as AFS, net of deferred tax expense. Beginning in 2018, with the adoption of ASU No. 2016-01, the Company's investments in equity securities at fair value are no longer considered to be AFS and are reported at fair value with unrealized gains and losses included in Net realized and unrealized (losses) gains on investments on the Company's Consolidated Statements of Comprehensive Income. Prior to 2018, investments in equity securities at fair value were classified as AFS and changes in fair value were excluded from earnings and reported in accumulated other comprehensive income. The following table summarizes the components of accumulated other comprehensive (loss) income:

	June 30, 2018			December 31, 2017
	(in millions)
Net unrealized (losses) gains on investments, before taxes	$	(16.8	)	$	136.0
Deferred tax benefit (expense) on net unrealized (losses) gains	3.5			(28.6		)
Total accumulated other comprehensive (loss) income	$	(13.3	)	$	107.4

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2018

Stock-Based Compensation [Abstract]

Stock-Based compensation

Stock-Based Compensation

The Company awarded restricted stock units (RSUs) and performance share units (PSUs) to certain employees and non-employee Directors of the Company as follows:

	Number Awarded	Weighted Average Fair Value on Date of Grant		Aggregate Fair Value on Date of Grant
				(in millions)
March 2018
RSUs(1)	71,400	$	40.30	$	2.9
RSUs(2)	736	40.50		—
PSUs(3)	96,940	40.30		3.9
May 2018
RSUs(4)	13,347	$	39.65	$	0.5

(1) The RSUs awarded in March 2018 were awarded to certain employees of the Company and vest 25% on March 15, 2019, and each of the subsequent three anniversaries of that date. The RSUs are subject to accelerated vesting in certain circumstances, including but not limited to: death, disability, retirement, or in connection with a change of control of the Company.

(2) The RSUs awarded in March 2018 were awarded to non-employee Directors of the Company and vested in full on May 25, 2018.

(3) The PSUs awarded in March 2018 were awarded to certain employees of the Company and have a performance period of two years followed by an additional one year vesting period. The PSU awards are subject to certain performance goals with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate number of PSUs awarded at the target level.

(4) The RSUs awarded in May 2018 were awarded to non-employee Directors of the Company and vest in full on May 24, 2019.

Employees who were awarded RSUs and PSUs are entitled to receive dividend equivalents for eligible awards, payable in cash, when the underlying award vests and becomes payable. If the underlying award does not vest or is forfeited, any dividend equivalents with respect to the underlying award will also fail to become payable and will be forfeited.

Stock options exercised totaled 13,800 for the six months ended June 30, 2018, 167,026 for the six months ended June 30, 2017, and 307,076 for the year ended December 31, 2017.

As of June 30, 2018, the Company had 233,547 options, 313,426 RSUs, and 266,535 PSUs (based on target number awarded) outstanding.

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Earnings Per Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Basic earnings per share is computed by dividing net income by the weighted average number of shares outstanding for the period. Diluted earnings per share reflects the potential dilutive impact of all common stock equivalents on earnings per share. Diluted earnings per share includes shares that are assumed to be issued under the “treasury stock method,” which reflects the potential dilution that would occur if outstanding RSUs and PSUs had vested and options were to be exercised.

Commencing in 2017, certain stock-based compensation awards are eligible to receive dividend equivalents on awards that fully vest or become payable. The dividend equivalents are reflected in the Company's net income; therefore, these awards are not considered participating securities for the purposes of determining earnings per share.

The following table presents the net income and the weighted average number of shares outstanding used in the earnings per common share calculations.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(in millions, except share data)
Net income—basic and diluted	$	42.5	$	24.8	$	68.1	$	48.0
Weighted average number of shares outstanding—basic	32,880,023		32,469,137		32,843,448		32,398,858
Effect of dilutive securities:
PSUs	202,149		235,617		253,098		272,754
Stock options	100,357		230,049		100,635		227,856
RSUs	40,177		57,795		62,578		83,460
Dilutive potential shares	342,683		523,461		416,311		584,070
Weighted average number of shares outstanding—diluted	33,222,706		32,992,598		33,259,759		32,982,928

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Changes in Estimates (Tables)

6 Months Ended

Jun. 30, 2018

Changes in Estimates [Abstract]

Change Due to Estimated Reserves Ceded Under the LPT Agreement [Table Text Block]

The Company reduced its estimated loss and LAE reserves ceded under the Loss Portfolio Transfer Agreement (LPT Reserve Adjustment) as a result of the determination that an adjustment was necessary to reflect observed favorable paid loss trends during the second quarter of 2018. The following table shows the financial statement impact related to the LPT Reserve Adjustment.

	Three Months Ended			Six Months Ended
	June 30, 2018			June 30, 2018
	(in millions, except per share data)
LPT Reserve Adjustment	$	(6.3	)	$	(6.3	)
Cumulative adjustment to the Deferred Gain(1)	(2.2		)	(2.2		)
Net income impact from this change in estimate	2.2			2.2
Earnings per common share impact from this change in estimate:
Basic and Diluted	0.07			0.07

(1) The cumulative adjustment to the Deferred reinsurance gain–LPT Agreement (Deferred Gain) was also recognized in losses and LAE incurred in the Company's Consolidated Statement of Comprehensive Income, so that the Deferred Gain reflects the balance that would have existed had the revised loss and LAE reserves been recognized at the inception of the LPT Agreement.

ChangetoContingentProfitCommission [Table Text Block]

The Company increased its estimate of Contingent commission receivable – LPT Agreement (LPT Contingent Commission Adjustment) as a result of the determination that an adjustment was necessary to reflect observed favorable paid loss trends during the second quarter of 2018. The following table shows the financial statement impact related to the LPT Contingent Commission Adjustment.

	Three Months Ended		Six Months Ended
	June 30, 2018		June 30, 2018
	(in millions, except per share data)
LPT Contingent Commission Adjustment	$	0.5	$	0.5
Net income impact from this change in estimate	0.5		0.5
Earnings per common share impact from this change in estimate:
Basic and Diluted	0.02		0.02

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Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value of Financial Instruments [Abstract]

Estimated fair value of financial instruments table

The carrying value and the estimated fair value of the Company’s financial instruments at fair value were as follows:

	June 30, 2018				December 31, 2017
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
	(in millions)
Financial assets
Total investments at fair value	$	2,598.9	$	2,598.9	$	2,677.7	$	2,677.7
Cash and cash equivalents	146.3		146.3		73.3		73.3
Restricted cash and cash equivalents	1.0		1.0		1.0		1.0
Financial liabilities
Notes payable	$	20.0	$	23.5	$	20.0	$	23.6

Fair value, assets and liabilities measured on recurring basis table

The following table presents the Company's investments at fair value and the corresponding fair value measurements.

	June 30, 2018						December 31, 2017
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
	(in millions)
Fixed maturity securities:
U.S. Treasuries	$	—	$	119.4	$	—	$	—	$	137.0	$	—
U.S. Agencies	—		11.5		—		—		11.8		—
States and municipalities	—		568.7		—		—		642.5		—
Corporate securities	—		1,079.5		—		—		1,118.0		—
Residential mortgage-backed securities	—		433.1		—		—		389.3		—
Commercial mortgage-backed securities	—		104.0		—		—		106.0		—
Asset-backed securities	—		67.3		—		—		58.8		—
Other securities	—		17.7		—		—		—		—
Total fixed maturity securities	$	—	$	2,401.2	$	—	$	—	$	2,463.4	$	—
Equity securities at fair value:
Industrial and miscellaneous	$	172.6	$	—	$	—	$	181.7	$	—	$	—
Non-redeemable preferred stock (FHLB)	—		—		—		—		—		4.7
Other	25.1		—		—		23.9		—		—
Total equity securities at fair value	197.7		—		—		205.6		—		4.7
Short-term investments	—		—		—		—		4.0		—
Total investments at fair value	$	197.7	$	2,401.2	$	—	$	205.6	$	2,467.4	$	4.7

Schedule of Cash and Cash Equivalents [Table Text Block]

The following table presents cash equivalents at NAV and total cash and cash equivalents carried at fair value on the Company's Consolidated Balance Sheets.

	June 30, 2018		December 31, 2017
	(in millions)
Cash and cash equivalents at fair value	$	61.3	$	34.3
Cash equivalents measured at NAV, which approximates fair value	85.0		39.0
Total cash and cash equivalents	$	146.3	$	73.3

Fair value, assets measured on recurring basis, unobservable input reconciliation table

The following table provides a reconciliation of the beginning and ending balances of investments that are recorded at fair value and are measured using Level 3 inputs for the six months ended June 30, 2018 and 2017.

	Level 3 Securities
	2018			2017
	(in millions)
Beginning balance, January 1	$	4.7		$	11.9
Transfers out of Level 3 (1)	(4.7		)	(7.0		)
Purchases and sales, net	—			(0.2		)
Ending balance, June 30	$	—		$	4.7

(1) The transfer during the six months ended June 30, 2018 was the result of adoption of ASU 2016-01, which specified that FHLB stock shall be carried at cost and is no longer measured at fair value. Transfers during the six months ended June 30, 2017 were from Level 3 to Level 2 as observable market data became available for these securities.

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Investments (Tables)

6 Months Ended

Jun. 30, 2018

Investments [Abstract]

Available-for-sale securities table

The cost or amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the Company’s AFS investments were as follows:

	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in millions)
At June 30, 2018
Fixed maturity securities
U.S. Treasuries	$	120.4	$	0.9	$	(1.9	)	$	119.4
U.S. Agencies	11.3		0.3		(0.1		)	11.5
States and municipalities	555.0		14.9		(1.2		)	568.7
Corporate securities	1,095.9		6.5		(22.9		)	1,079.5
Residential mortgage-backed securities	442.9		2.0		(11.8		)	433.1
Commercial mortgage-backed securities	107.1		—		(3.1		)	104.0
Asset-backed securities	67.6		0.2		(0.5		)	67.3
Other securities	17.8		—		(0.1		)	17.7
Total fixed maturity securities	2,418.0		24.8		(41.6		)	2,401.2
Total AFS investments	$	2,418.0	$	24.8	$	(41.6	)	$	2,401.2

At December 31, 2017
Fixed maturity securities
U.S. Treasuries	$	135.8	$	2.0	$	(0.8	)	$	137.0
U.S. Agencies	11.3		0.5		—			11.8
States and municipalities	617.0		25.5		—			642.5
Corporate securities	1,103.4		18.0		(3.4		)	1,118.0
Residential mortgage-backed securities	388.3		3.6		(2.6		)	389.3
Commercial mortgage-backed securities	106.5		0.4		(0.9		)	106.0
Asset-backed securities	58.7		0.3		(0.2		)	58.8
Total fixed maturity securities	2,421.0		50.3		(7.9		)	2,463.4
Equity securities at fair value
Industrial and miscellaneous	100.8		81.5		(0.6		)	181.7
Non-redeemable preferred stock (FHLB)	4.7		—		—			4.7
Other	11.2		12.7		—			23.9
Total equity securities at fair value	116.7		94.2		(0.6		)	210.3
Short-term investments	4.0		—		—			4.0
Total AFS investments	$	2,541.7	$	144.5	$	(8.5	)	$	2,677.7

Equity securities table

The cost and estimated fair value of the Company’s equity securities recorded at fair value at June 30, 2018 were as follows:

	Cost		Estimated Fair Value
	(in millions)
At June 30, 2018
Equity securities at fair value
Industrial and miscellaneous	$	99.4	$	172.6
Other	14.1		25.1
Total equity securities at fair value	$	113.5	$	197.7

Investments classified by contractual maturity date table

The amortized cost and estimated fair value of the Company's fixed maturity securities at June 30, 2018, by contractual maturity, are shown below. Expected maturities differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Estimated Fair Value
	(in millions)
Due in one year or less	$	177.8	$	178.3
Due after one year through five years	761.7		763.6
Due after five years through ten years	730.0		720.6
Due after ten years	130.9		134.3
Mortgage and asset-backed securities	617.6		604.4
Total	$	2,418.0	$	2,401.2

Unrealized loss on investments table

The following is a summary of AFS investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or greater as of June 30, 2018 and December 31, 2017.

	June 30, 2018						December 31, 2017
	Estimated Fair Value		Gross Unrealized Losses			Number of Issues	Estimated Fair Value		Gross Unrealized Losses			Number of Issues
	(in millions, except number of issues data)
Less than 12 months:
Fixed maturity securities
U.S. Treasuries	$	82.0	$	(1.6	)	27	$	86.0	$	(0.5	)	28
U.S. Agencies	3.7		(0.1		)	2	—		—			—
States and municipalities	84.0		(1.2		)	24	—		—			—
Corporate securities	811.5		(21.0		)	265	307.6		(2.3		)	113
Residential mortgage-backed securities	310.0		(8.1		)	93	165.0		(0.8		)	45
Commercial mortgage-backed securities	75.4		(2.0		)	34	41.8		(0.2		)	19
Asset-backed securities	53.1		(0.5		)	37	29.3		(0.2		)	25
Other securities	16.1		(0.1		)	23	—		—			—
Total less than 12 months	$	1,435.8	$	(34.6	)	505	$	629.7	$	(4.0	)	230
12 months or greater:
Fixed maturity securities
U.S. Treasuries	$	17.7	$	(0.3	)	9	$	23.4	$	(0.3	)	10
Corporate securities	36.1		(1.9		)	15	53.2		(1.1		)	17
Residential mortgage-backed securities	69.7		(3.7		)	32	77.1		(1.8		)	32
Commercial mortgage-backed securities	20.2		(1.1		)	8	25.1		(0.7		)	8
Total 12 months or greater	$	143.7	$	(7.0	)	64	$	178.8	$	(3.9	)	67

Unrealized gain (loss) on investments

Net realized gains on investments and the change in unrealized gains (losses) on the Company's investments recorded at fair value are determined on a specific-identification basis and were as follows:

	Gross Realized Gains		Gross Realized Losses			Change in Net Unrealized Gains (Losses)			Changes in Fair Value Reflected in Earnings			Changes in Fair Value Reflected in AOCI, before tax
			(in millions)
Three Months Ended June 30, 2018
Fixed maturity securities	$	0.3	$	(0.3	)	$	(14.3	)	$	—		$	(14.3	)
Equity securities	2.6		(0.4		)	3.5			5.7			—
Total investments	$	2.9	$	(0.7	)	$	(10.8	)	$	5.7		$	(14.3	)
Six Months Ended June 30, 2018
Fixed maturity securities	$	2.1	$	(2.6	)	$	(59.2	)	$	(0.5	)	$	(59.2	)
Equity securities	8.1		(0.6		)	(9.4		)	(1.9		)	—
Total investments	$	10.2	$	(3.2	)	$	(68.6	)	$	(2.4	)	$	(59.2	)

Three Months Ended June 30, 2017
Fixed maturity securities	$	—	$	—		$	12.5		$	—	$	12.5
Equity securities	1.1		—			(0.7		)	1.1		(0.7		)
Total investments	$	1.1	$	—		$	11.8		$	1.1	$	11.8
Six Months Ended June 30, 2017
Fixed maturity securities	$	0.5	$	(0.1	)	$	18.9		$	0.4	$	18.9
Equity securities	3.1		(0.2		)	5.4			2.9		5.4
Total investments	$	3.6	$	(0.3	)	$	24.3		$	3.3	$	24.3

Investment income table

Net investment income was as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
	(in millions)
Fixed maturity securities	$	19.2		$	17.3		$	37.7		$	35.0
Equity securities	1.7			1.7			3.3			3.5
Cash equivalents and restricted cash	0.3			0.1			0.5			0.2
Gross investment income	21.2			19.1			41.5			38.7
Investment expenses	(0.9		)	(0.9		)	(1.8		)	(1.8		)
Net investment income	$	20.3		$	18.2		$	39.7		$	36.9

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Liability for Unpaid Losses and Loss Adjustment Expenses (Tables)

6 Months Ended

Jun. 30, 2018

Liability for Unpaid Losses and Loss Adjustment Expenses [Abstract]

Changes in the liability for unpaid losses and LAE table

The following table represents a reconciliation of changes in the liability for unpaid losses and LAE.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
	(in millions)
Unpaid losses and LAE at beginning of period	$	2,258.1		$	2,298.2		$	2,266.1		$	2,301.0
Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	531.1			572.9			537.0			580.0
Net unpaid losses and LAE at beginning of period	1,727.0			1,725.3			1,729.1			1,721.0
Losses and LAE, net of reinsurance, incurred during the period related to:
Current period	111.2			109.4			221.6			221.3
Prior periods	(16.5		)	(0.3		)	(28.9		)	(0.3		)
Total net losses and LAE incurred during the period	94.7			109.1			192.7			221.0
Paid losses and LAE, net of reinsurance, related to:
Current period	20.0			17.0			25.9			21.7
Prior periods	86.3			92.3			180.5			195.2
Total net paid losses and LAE during the period	106.3			109.3			206.4			216.9
Ending unpaid losses and LAE, net of reinsurance	1,715.4			1,725.1			1,715.4			1,725.1
Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	512.5			559.8			512.5			559.8
Unpaid losses and LAE at end of period	$	2,227.9		$	2,284.9		$	2,227.9		$	2,284.9

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Notes Payable (Tables)

6 Months Ended

Jun. 30, 2018

Notes Payable [Abstract]

Schedule of long-term debt instruments table

Notes payable is comprised of the following:

	June 30, 2018		December 31, 2017
	(in millions)
Dekania Surplus Note, due April 29, 2034	$	10.0	$	10.0
Alesco Surplus Note, due December 15, 2034	10.0		10.0
Total	$	20.0	$	20.0

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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income [Abstract]

Schedule of accumulated other comprehensive income (loss) table

The following table summarizes the components of accumulated other comprehensive (loss) income:

	June 30, 2018			December 31, 2017
	(in millions)
Net unrealized (losses) gains on investments, before taxes	$	(16.8	)	$	136.0
Deferred tax benefit (expense) on net unrealized (losses) gains	3.5			(28.6		)
Total accumulated other comprehensive (loss) income	$	(13.3	)	$	107.4

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Stock-Based Compensation Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Stock-Based Compensation [Abstract]

Share-based compensation arrangements by share-based payment award table

The Company awarded restricted stock units (RSUs) and performance share units (PSUs) to certain employees and non-employee Directors of the Company as follows:

	Number Awarded	Weighted Average Fair Value on Date of Grant		Aggregate Fair Value on Date of Grant
				(in millions)
March 2018
RSUs(1)	71,400	$	40.30	$	2.9
RSUs(2)	736	40.50		—
PSUs(3)	96,940	40.30		3.9
May 2018
RSUs(4)	13,347	$	39.65	$	0.5

(1) The RSUs awarded in March 2018 were awarded to certain employees of the Company and vest 25% on March 15, 2019, and each of the subsequent three anniversaries of that date. The RSUs are subject to accelerated vesting in certain circumstances, including but not limited to: death, disability, retirement, or in connection with a change of control of the Company.

(2) The RSUs awarded in March 2018 were awarded to non-employee Directors of the Company and vested in full on May 25, 2018.

(3) The PSUs awarded in March 2018 were awarded to certain employees of the Company and have a performance period of two years followed by an additional one year vesting period. The PSU awards are subject to certain performance goals with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate number of PSUs awarded at the target level.

(4) The RSUs awarded in May 2018 were awarded to non-employee Directors of the Company and vest in full on May 24, 2019.

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Net income and weighted average common shares outstanding used in earnings per share calculations table

The following table presents the net income and the weighted average number of shares outstanding used in the earnings per common share calculations.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(in millions, except share data)
Net income—basic and diluted	$	42.5	$	24.8	$	68.1	$	48.0
Weighted average number of shares outstanding—basic	32,880,023		32,469,137		32,843,448		32,398,858
Effect of dilutive securities:
PSUs	202,149		235,617		253,098		272,754
Stock options	100,357		230,049		100,635		227,856
RSUs	40,177		57,795		62,578		83,460
Dilutive potential shares	342,683		523,461		416,311		584,070
Weighted average number of shares outstanding—diluted	33,222,706		32,992,598		33,259,759		32,982,928

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Basis of Presentation Pending Purchase of PRUS (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Estimated statutory capital and surplus of pending acquisition	$ 40.0
Net cash payment to acquire business	$ 5.8

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Changes in Estimates (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Change in Accounting Estimate [Line Items]
Net income		$ 42,500	$ 24,800	$ 68,100	$ 48,000
Change Due to Estimated Reserves Ceded Under the LPT Agreement [Member]
Change in Accounting Estimate [Line Items]
LPT reserve adjustment		(6,300)		(6,300)
Cumulative adjustment to the Deferred Gain	[1]	(2,200)		(2,200)
Net income		$ 2,200		$ 2,200
Basic and Diluted		$ 0.07		$ 0.07
Change to Contingent Profit Commission [Member]
Change in Accounting Estimate [Line Items]
Net income		$ 500		$ 500
Change in estimate of contingent commission receivable		$ 500		$ 500
Basic and Diluted		$ 0.02		$ 0.02

[1] The cumulative adjustment to the Deferred reinsurance gain–LPT Agreement (Deferred Gain) was also recognized in losses and LAE incurred in the Company's Consolidated Statement of Comprehensive Income, so that the Deferred Gain reflects the balance that would have existed had the revised loss and LAE reserves been recognized at the inception of the LPT Agreement.

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New Accounting Standards Adopted ASU (Details) - Accounting Standards Update 2016-01 [Member] $ in Millions	Jun. 30, 2018 USD ($)
Reclassification adjustment for adoption of ASU	$ 0.0
Accumulated Other Comprehensive Income, Net
Reclassification adjustment for adoption of ASU	(74.0)
Retained Earnings
Reclassification adjustment for adoption of ASU	$ 74.0

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New Accounting Standards Not Yet Adopted ASU (Details) $ in Millions	Jun. 30, 2018 USD ($)
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability	$ 23.0

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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total investments at fair value	$ 2,598,900	$ 2,677,700
Total Investments at fair value, estimated fair value	2,598,900	2,677,700
Cash and cash equivalents	146,300	73,300
Cash and cash equivalents, estimated fair value	146,300	73,300
Equity securities at cost	6,400	0
Restricted cash and cash equivalents	1,000	1,000
Notes payable	20,000	20,000
Notes Payable, estimated fair value	23,500	23,600
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Restricted cash and cash equivalents	$ 1,000	$ 1,000

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Fair Value of Financial Instruments, Fair Value Inputs (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 2,401.2	$ 2,677.7
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	197.7	205.6
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2,401.2	2,467.4
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	4.7
Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2,401.2	2,463.4
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2,401.2	2,463.4
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	119.4	137.0
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	119.4	137.0
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	11.5	11.8
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	11.5	11.8
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	568.7	642.5
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	568.7	642.5
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,079.5	1,118.0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,079.5	1,118.0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	433.1	389.3
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	433.1	389.3
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	104.0	106.0
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	104.0	106.0
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	67.3	58.8
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	67.3	58.8
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Other Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	17.7
Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	17.7	0.0
Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		210.3
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	197.7	205.6
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	4.7
Industrial and Miscellaneous [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		181.7
Industrial and Miscellaneous [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	172.6	181.7
Industrial and Miscellaneous [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Industrial and Miscellaneous [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Non-redeemable preferred (FHLB stock) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		4.7
Non-redeemable preferred (FHLB stock) [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Non-redeemable preferred (FHLB stock) [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Non-redeemable preferred (FHLB stock) [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	4.7
Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		23.9
Other [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	25.1	23.9
Other [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Other [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	4.0
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0.0	0.0
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		4.0
Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 0.0	$ 0.0

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Fair Value of Financial Instruments Cash Equivalents at NAV and Total Cash and Cash Equivalents Carried at Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents at fair value	$ 61.3	$ 34.3
Cash equivalents measured at NAV, which approximates fair value	85.0	39.0
Total cash and cash equivalents	$ 146.3	$ 73.3

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Fair Value of Financial Instruments Fair Value of Financial Instruments, Reconciliation of Level 3 Securities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018		Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance, January 1	$ 2,677,700
Ending balance, March 31	2,605,300
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance, January 1	4,700		$ 11,900
Transfers out of Level 3 (1)	(4,700)	[1]	(7,000)
Purchases and sales, net	0		(200)
Ending balance, March 31	$ 0		$ 4,700

[1] (1)The transfer during the six months ended June 30, 2018 was the result of adoption of ASU 2016-01, which specified that FHLB stock shall be carried at cost and is no longer measured at fair value. Transfers during the six months ended June 30, 2017 were from Level 3 to Level 2 as observable market data became available for these securities.

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Investments Available for Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 2,418,000	$ 2,541,700
Gross unrealized gain	24,800	144,500
Gross unrealized loss	(41,600)	(8,500)
Investments	2,401,200	2,677,700
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	2,418,000	2,421,000
Gross unrealized gain	24,800	50,300
Gross unrealized loss	(41,600)	(7,900)
Investments	2,401,200	2,463,400
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	120,400	135,800
Gross unrealized gain	900	2,000
Gross unrealized loss	(1,900)	(800)
Investments	119,400	137,000
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	11,300	11,300
Gross unrealized gain	300	500
Gross unrealized loss	(100)	0
Investments	11,500	11,800
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	555,000	617,000
Gross unrealized gain	14,900	25,500
Gross unrealized loss	(1,200)	0
Investments	568,700	642,500
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,095,900	1,103,400
Gross unrealized gain	6,500	18,000
Gross unrealized loss	(22,900)	(3,400)
Investments	1,079,500	1,118,000
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	442,900	388,300
Gross unrealized gain	2,000	3,600
Gross unrealized loss	(11,800)	(2,600)
Investments	433,100	389,300
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	107,100	106,500
Gross unrealized gain	0	400
Gross unrealized loss	(3,100)	(900)
Investments	104,000	106,000
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	67,600	58,700
Gross unrealized gain	200	300
Gross unrealized loss	(500)	(200)
Investments	67,300	58,800
Other Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	17,800
Gross unrealized gain	0
Gross unrealized loss	(100)
Investments	17,700
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		116,700
Gross unrealized gain		94,200
Gross unrealized loss		(600)
Investments		210,300
Industrial and Miscellaneous [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		100,800
Gross unrealized gain		81,500
Gross unrealized loss		(600)
Investments		181,700
Non-redeemable preferred (FHLB stock) [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		4,700
Gross unrealized gain		0
Gross unrealized loss		0
Investments		4,700
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		11,200
Gross unrealized gain		12,700
Gross unrealized loss		0
Investments		23,900
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		4,000
Gross unrealized gain		0
Gross unrealized loss		0
Investments	$ 0	$ 4,000

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Investments Equity Securities (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Schedule of Equity Securities and Other [Line Items]
Equity securities at fair value, cost	$ 113,500
Equity securities, estimated fair value	197,700
Industrial and Miscellaneous [Member]
Schedule of Equity Securities and Other [Line Items]
Equity securities at fair value, cost	99,400
Equity securities, estimated fair value	172,600
Other [Member]
Schedule of Equity Securities and Other [Line Items]
Equity securities at fair value, cost	14,100
Equity securities, estimated fair value	$ 25,100

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Investments, Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less, amortized cost	$ 177,800
Due after one year through five years, amortized cost	761,700
Due after five years through ten years, amortized cost	730,000
Due after ten years, amortized cost	130,900
Mortgage and asset-backed securities, amortized cost	617,600
Total, amortized cost	2,418,000
Estimated Fair Value
Due in one year or less, fair value	178,300
Due after one year through five years, fair value	763,600
Due after five years through ten years, fair value	720,600
Due after ten years, fair value	134,300
Mortgage and asset-backed securities, fair value	604,400
Total, fair value	$ 2,401,200	$ 2,463,400

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Investments, Continuous Loss Position (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($) shares	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($) shares	Dec. 31, 2017 USD ($) shares
Estimated Fair Value
Estimated fair value, less than 12 months	$ 1,435,800,000		$ 1,435,800,000		$ 629,700,000
Estimated fair value, 12 months or greater	143,700,000		143,700,000		178,800,000
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	(34,600,000)		(34,600,000)		(4,000,000)
Gross unrealized losses, 12 months or greater	$ (7,000,000)		$ (7,000,000)		$ (3,900,000)
Number of issues in loss position, less than 12 months	505		505		230
Number of Issues in loss position, 12 months or greater	64		64		67
Other than temporary impairment, credit losses recognized in earnings	$ 0	$ 0	$ 2,000,000	$ 200,000
Debt Securities [Member]
Gross Unrealized Losses
Other than temporary impairment, credit losses recognized in earnings			$ 2,000,000
Total impairments, number of securities | shares	57	0	57	0
US Treasury Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 82,000,000		$ 82,000,000		$ 86,000,000
Estimated fair value, 12 months or greater	17,700,000		17,700,000		23,400,000
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	(1,600,000)		(1,600,000)		(500,000)
Gross unrealized losses, 12 months or greater	$ (300,000)		$ (300,000)		$ (300,000)
Number of issues in loss position, less than 12 months	27		27		28
Number of Issues in loss position, 12 months or greater	9		9		10
US Government Agencies Debt Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 3,700,000		$ 3,700,000		$ 0
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	$ (100,000)		$ (100,000)		$ 0
Number of issues in loss position, less than 12 months	2		2		0
US States and Political Subdivisions Debt Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 84,000,000		$ 84,000,000		$ 0
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	$ (1,200,000)		$ (1,200,000)		$ 0
Number of issues in loss position, less than 12 months	24		24		0
Corporate Debt Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 811,500,000		$ 811,500,000		$ 307,600,000
Estimated fair value, 12 months or greater	36,100,000		36,100,000		53,200,000
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	(21,000,000)		(21,000,000)		(2,300,000)
Gross unrealized losses, 12 months or greater	$ (1,900,000)		$ (1,900,000)		$ (1,100,000)
Number of issues in loss position, less than 12 months	265		265		113
Number of Issues in loss position, 12 months or greater	15		15		17
Residential Mortgage Backed Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 310,000,000		$ 310,000,000		$ 165,000,000
Estimated fair value, 12 months or greater	69,700,000		69,700,000		77,100,000
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	(8,100,000)		(8,100,000)		(800,000)
Gross unrealized losses, 12 months or greater	$ (3,700,000)		$ (3,700,000)		$ (1,800,000)
Number of issues in loss position, less than 12 months	93		93		45
Number of Issues in loss position, 12 months or greater	32		32		32
Commercial Mortgage Backed Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 75,400,000		$ 75,400,000		$ 41,800,000
Estimated fair value, 12 months or greater	20,200,000		20,200,000		25,100,000
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	(2,000,000)		(2,000,000)		(200,000)
Gross unrealized losses, 12 months or greater	$ (1,100,000)		$ (1,100,000)		$ (700,000)
Number of issues in loss position, less than 12 months	34		34		19
Number of Issues in loss position, 12 months or greater	8		8		8
Asset-backed Securities [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 53,100,000		$ 53,100,000		$ 29,300,000
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	$ (500,000)		$ (500,000)		$ (200,000)
Number of issues in loss position, less than 12 months	37		37		25
Equity Securities [Member]
Gross Unrealized Losses
Gross unrealized losses, less than 12 months					$ (600,000)
Number of issues in loss position, less than 12 months | shares					24
Other than temporary impairment, credit losses recognized in earnings				$ 200,000
Total impairments, number of securities | shares		1		1
Other Debt Obligations [Member]
Estimated Fair Value
Estimated fair value, less than 12 months	$ 16,100,000		$ 16,100,000		$ 0
Gross Unrealized Losses
Gross unrealized losses, less than 12 months	$ (100,000)		$ (100,000)		$ 0
Number of issues in loss position, less than 12 months	23		23		0

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Investments Investments, Net Realized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
AFS, change in unrealized gains (losses)
AFS, change unrealized gains (losses) on fixed maturity and equity securities reflected in AOCI	$ (14,300)	$ 11,800	$ (59,200)	$ 24,300
AFS, net realized gains (losses)
AFS, Gross gains from sales		1,100		3,600
AFS, Gross losses from sales		0		(300)
Net realized (losses) gains on investments	5,700	1,100		3,300
Net realized and unrealized (losses) gains on investments	5,700	1,100	(2,400)	3,300
Total gross realized gains	2,900		10,200
Total gross realized losses	(700)		(3,200)
Total change in net unrealized gains (losses)	(10,800)		(68,600)
Debt Securities [Member]
AFS, change in unrealized gains (losses)
AFS, change unrealized gains (losses) on fixed maturity and equity securities reflected in AOCI	(14,300)	12,500	(59,200)	18,900
AFS, net realized gains (losses)
AFS, Gross gains from sales	300	0	2,100	500
AFS, Gross losses from sales	(300)	0	(2,600)	(100)
Net realized (losses) gains on investments		0		400
Net realized and unrealized (losses) gains on investments	0		(500)
Equity Securities [Member]
Equity securities:
Equity securities, gross realized gain	2,600		8,100
Equity securities, gross realized loss	(400)		(600)
Equity securities, change in unrealized gains (losses)	3,500		(9,400)
AFS, change in unrealized gains (losses)
AFS, change unrealized gains (losses) on fixed maturity and equity securities reflected in AOCI	0	(700)	0	5,400
AFS, net realized gains (losses)
AFS, Gross gains from sales		1,100		3,100
AFS, Gross losses from sales		0		(200)
Net realized (losses) gains on investments		$ 1,100		$ 2,900
Net realized and unrealized (losses) gains on investments	$ 5,700		$ (1,900)

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Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 21.2	$ 19.1	$ 41.5	$ 38.7
Investment expenses	0.9	0.9	1.8	1.8
Net investment income	20.3	18.2	39.7	36.9
Debt Securities [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income related to fixed maturity securities and short-term investments and cash equivalents	19.2	17.3	37.7	35.0
Equity Securities [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income related to equity securities	1.7	1.7	3.3	3.5
Short-term Investments [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income related to fixed maturity securities and short-term investments and cash equivalents	$ 0.3	$ 0.1	$ 0.5	$ 0.2

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Investments Investments, Held in Trust or on Deposit (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Deposit Assets [Abstract]
Investments	$ 2,605,300	$ 2,677,700
Assets Held-in-trust [Abstract]
Funds Held under Reinsurance Agreements, Asset	22,900	24,500
Federal Home Loan Bank [Member]
Deposit Assets [Abstract]
Investments	140,000
Required by various state laws and regulations to hold securities or letters of credit in depository account [Member]
Deposit Assets [Abstract]
Investments	$ 954,400	$ 1,009,700

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Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory tax rate			21.00%	35.00%
Effective tax rate	17.20%	23.90%	15.60%	22.70%

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Liability for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Unpaid losses and LAE at beginning of period	$ 2,258,100	$ 2,298,200	$ 2,266,100	$ 2,301,000
Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	531,100	572,900	537,000	580,000
Net unpaid losses and LAE at beginning of period	1,727,000	1,725,300	1,729,100	1,721,000
Losses and LAE, net of reinsurance, incurred during the period related to:
Current period	111,200	109,400	221,600	221,300
Prior periods	(16,500)	(300)	(28,900)	(300)
Total net losses and LAE incurred during the period	94,700	109,100	192,700	221,000
Deduct payments for losses and LAE, net of reinsurance, related to:
Current period	20,000	17,000	25,900	21,700
Prior periods	86,300	92,300	180,500	195,200
Total net paid losses and LAE during the period	106,300	109,300	206,400	216,900
Ending unpaid losses and LAE, net of reinsurance	1,715,400	1,725,100	1,715,400	1,725,100
Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	512,500	559,800	512,500	559,800
Unpaid losses and LAE at end of period	2,227,900	2,284,900	2,227,900	2,284,900
LPT Agreement [Abstract]
Impact of the LPT Agreement	6,900	$ 3,100	9,500	$ 6,000
Involuntary Assigned Risk Business [Member]
Losses and LAE, net of reinsurance, incurred during the period related to:
Prior periods			(400)
Voluntary Risk Business [Member]
Losses and LAE, net of reinsurance, incurred during the period related to:
Prior periods	$ (16,500)		$ (28,500)

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LPT Agreement LPT Agreement (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Reinsurance Agreement [Line Items]
Impact of the LPT Agreement		$ 6,900	$ 3,100	$ 9,500	$ 6,000
Liabilities for the incurred but unpaid losses and LAE related to claims prior to July 1, 1995		1,500,000		1,500,000
Ceded premiums written				775,000
Amortization of deferred gain		4,200	$ 3,100	6,800	$ 6,000
Deferred reinsurance gain—LPT Agreement		154,700		154,700		$ 163,600
Estimated remaining liabilities - LPT Agreement		420,300		420,300		438,900
Paid losses and LAE claims related to LPT		761,600		761,600		$ 749,300
Indemnification Agreement [Member]
Reinsurance Agreement [Line Items]
Coverage provided under LPT Agreement		2,000,000		2,000,000
Change Due to Estimated Reserves Ceded Under the LPT Agreement [Member]
Reinsurance Agreement [Line Items]
LPT reserve adjustment	[1]	2,200		2,200
Change to Contingent Profit Commission [Member]
Reinsurance Agreement [Line Items]
Change in estimate of contingent commission receivable		$ 500		$ 500

[1] The cumulative adjustment to the Deferred reinsurance gain–LPT Agreement (Deferred Gain) was also recognized in losses and LAE incurred in the Company's Consolidated Statement of Comprehensive Income, so that the Deferred Gain reflects the balance that would have existed had the revised loss and LAE reserves been recognized at the inception of the LPT Agreement.

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Notes Payable Notes Payable Outstanding(Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Notes payable	$ 20,000	$ 20,000
Dekania Surplus Note [Member]
Debt Instrument [Line Items]
Notes payable	$ 10,000	10,000
Notes payable, maturity date	Apr. 30, 2034
Notes payable, callable	2009
Interest rate, basis points in excess of the 90-day LIBOR	425
Alesco Surplus Note [Member]
Debt Instrument [Line Items]
Notes payable	$ 10,000	$ 10,000
Notes payable, maturity date	Dec. 15, 2034
Notes payable, callable	2009
Interest rate, basis points in excess of the 90-day LIBOR	405

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Notes Payable Letters of Credit (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Letters of Credit Facilities [Line Items]
Letters of credit, unused capacity, commitment fee percentage	0.15%
Federal Home Loan Bank [Member]
Letters of Credit Facilities [Line Items]
Letters of credit facilities, maximum borrowing capacity	$ 140.0
Letters of credit collateral amount	258.7
Federal Home Loan Bank [Member] | EAC
Letters of Credit Facilities [Line Items]
Letters of credit facilities, maximum borrowing capacity	40.0
Federal Home Loan Bank [Member] | ECIC
Letters of Credit Facilities [Line Items]
Letters of credit facilities, maximum borrowing capacity	50.0
Federal Home Loan Bank [Member] | EPIC
Letters of Credit Facilities [Line Items]
Letters of credit facilities, maximum borrowing capacity	$ 50.0

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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized gain on investments, before taxes	$ (16,800)	$ 136,000
Deferred tax expense on net unrealized gains	3,500	(28,600)
Accumulated other comprehensive income, net	$ (13,300)	$ 107,400

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Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
		May 31, 2018	Mar. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-options exercised				13,800	167,026	307,076
Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights for RSUs awarded			vest 25% on March 15, 2019, and each of the subsequent three anniversaries of that date
Performance share awards performance period			two years
Performance share awards, minimum payout			0.00%
Performance share awards, maximum payout			200.00%
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights for RSUs awarded		vest in full on May 24, 2019	vested in full on May 25, 2018
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding options or share units				233,547
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, shares issued	[1]	13,347
Share-based compensation options, exercise price on grant date	[1]	$ 39.65
Fair value of awards awarded on grant date	[1]	$ 0.5
Number of outstanding options or share units				313,426
Restricted Stock Units (RSUs) [Member] | Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, shares issued	[2]		71,400
Share-based compensation options, exercise price on grant date	[2]		$ 40.30
Fair value of awards awarded on grant date	[2]		$ 2.9
Restricted Stock Units (RSUs) [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, shares issued	[3]		736
Share-based compensation options, exercise price on grant date	[3]		$ 40.50
Fair value of awards awarded on grant date	[3]		$ 0.0
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding options or share units				266,535
Performance Shares [Member] | Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, shares issued	[4]		96,940
Share-based compensation options, exercise price on grant date	[4]		$ 40.30
Fair value of awards awarded on grant date	[4]		$ 3.9
Share-based compensation arrangement by share-based payment award, award vesting period			1 year

[1] The RSUs awarded in May 2018 were awarded to non-employee Directors of the Company and vest in full on May 24, 2019.

[2] The RSUs awarded in March 2018 were awarded to certain employees of the Company and vest 25% on March 15, 2019, and each of the subsequent three anniversaries of that date. The RSUs are subject to accelerated vesting in certain circumstances, including but not limited to: death, disability, retirement, or in connection with a change of control of the Company.

[3] The RSUs awarded in March 2018 were awarded to non-employee Directors of the Company and vested in full on May 25, 2018

[4] The PSUs awarded in March 2018 were awarded to certain employees of the Company and have a performance period of two years followed by an additional one year vesting period. The PSU awards are subject to certain performance goals with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate number of PSUs awarded at the target level.

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Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income available to stockholders - basic and diluted	$ 42,500	$ 24,800	$ 68,100	$ 48,000
Weighted average number of shares outstanding - basic	32,880,023	32,469,137	32,843,448	32,398,858
Effect of dilutive securities:
Dilutive securities	342,683	523,461	416,311	584,070
Weighted average number of shares outstanding - diluted	33,222,706	32,992,598	33,259,759	32,982,928
Performance Shares [Member]
Effect of dilutive securities:
Dilutive securities	202,149	235,617	253,098	272,754
Employee Stock Option [Member]
Effect of dilutive securities:
Dilutive securities	100,357	230,049	100,635	227,856
Restricted Stock Units (RSUs) [Member]
Effect of dilutive securities:
Dilutive securities	40,177	57,795	62,578	83,460

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Label	Element	Value
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 147,300,000