Employers (EIG) 10-Q 1 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 24, 2014
Document and Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
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	'	31,375,759
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available for sale:	'	'
Fixed maturity securities at fair value (amortized cost $2,131,381 at March 31, 2014 and $2,116,064 at December 31, 2013)	$2,211,159	$2,182,546
Equity securities at fair value (cost $92,139 at March 31, 2014 and $89,689 at December 31, 2013)	163,928	162,312
Total investments	2,375,087	2,344,858
Cash and cash equivalents	51,118	34,503
Restricted cash and cash equivalents	8,935	6,564
Accrued investment income	19,381	20,255
Premiums receivable (less bad debt allowance of $7,082 at March 31, 2014 and $7,064 at December 31, 2013)	294,077	279,080
Reinsurance recoverable for:	'	'
Paid losses	8,266	8,412
Unpaid losses, including bad debt allowance of $389 at March 31, 2014 and December 31, 2013	735,453	742,666
Deferred policy acquisition costs	46,423	43,532
Deferred income taxes, net	54,673	58,062
Property and equipment, net	16,228	16,616
Intangible assets, net	9,517	9,685
Goodwill	36,192	36,192
Contingent commission receivable—LPT Agreement	25,528	25,104
Other assets	18,094	17,920
Total assets	3,698,972	3,643,449
Claims and policy liabilities:	'	'
Unpaid losses and loss adjustment expenses	2,358,178	2,330,491
Unearned premiums	320,678	303,967
Total claims and policy liabilities	2,678,856	2,634,458
Commissions and premium taxes payable	44,531	45,314
Accounts payable and accrued expenses	17,116	18,711
Deferred reinsurance gain—LPT Agreement	245,197	249,072
Notes payable	102,000	102,000
Other liabilities	23,411	25,191
Total liabilities	3,111,111	3,074,746
Commitments and contingencies	'	'
Stockholders’ equity:	'	'
Common stock, $0.01 par value; 150,000,000 shares authorized; 54,748,733 and 54,672,904 shares issued and 31,375,759 and 31,299,930 shares outstanding at March 31, 2014 and December 31, 2013, respectively	547	547
Preferred stock, $0.01 par value; 25,000,000 shares authorized; none issued	0	0
Additional paid-in capital	340,279	338,090
Retained earnings	511,067	502,198
Accumulated other comprehensive income, net	98,518	90,418
Treasury stock, at cost (23,372,974 shares at March 31, 2014 and December 31, 2013)	-362,550	-362,550
Total stockholders’ equity	587,861	568,703
Total liabilities and stockholders’ equity	$3,698,972	$3,643,449

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Available for sale:	'	'
Fixed maturity securities, amortized cost	$2,223,520	$2,205,753
Premiums receivable, bad debt allowance	7,082	7,094
Reinsurance Recoverables on Unpaid Losses, Allowance	389	389
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)	54,748,733	54,672,904
Common stock, shares outstanding (in shares)	31,375,759	31,299,930
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)	23,372,974	23,372,974
Debt Securities [Member]	'	'
Available for sale:	'	'
Fixed maturity securities, amortized cost	2,131,381	2,116,064
Equity Securities [Member]	'	'
Available for sale:	'	'
Fixed maturity securities, amortized cost	$92,139	$89,689

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Revenues	'	'
Net premiums earned	$167,154	$147,975
Net investment income	18,013	17,405
Realized gains on investments, net	3,259	794
Other income	55	103
Total revenues	188,481	166,277
Expenses	'	'
Losses and loss adjustment expenses	122,256	108,272
Commission expense	20,075	18,393
Underwriting and other operating expenses	33,301	31,540
Interest expense	778	808
Total expenses	176,410	159,013
Net income before income taxes	12,071	7,264
Income tax expense (benefit)	1,318	-226
Net income	10,753	7,490
Earnings per common share (Note 9):	'	'
Basic and Diluted	$0.34	$0.24
Cash dividends declared per common share	$0.06	$0.06
Comprehensive income	'	'
Unrealized gains during the period (net of tax expense of $5,503 and $14 for the three months ended March 31, 2014 and 2013, respectively)	10,218	25
Reclassification adjustment for realized gains in net income (net of taxes of $1,141 and $278 for the three months ended March 31, 2014 and 2013, respectively)	-2,118	-516
Other comprehensive income (loss), net of tax	8,100	-491
Total comprehensive income	18,853	6,999
Net realized gains on investments	'	'
Net realized gains on investments before credit related impairments on fixed maturity securities	3,259	794
Other than temporary impairment, credit losses recognized in earnings	0	0
Realized gains on investments, net	$3,259	$794

Conolidated_Statements_of_Comp

Conolidated Statements of Comprehensive Income (Parentheticals) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Statement Parenthetical [Abstract]	'	'
Other comprehensive income (loss), unrealized holding gain (loss) on securities arising during period, tax	$5,503	$14
Other comprehensive income (loss), reclassification adjustment for sale of securities included in net income, tax	$1,141	$278

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating activities	'	'
Net income	$10,753	$7,490
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	1,797	1,393
Stock-based compensation	1,596	2,110
Amortization of premium on investments, net	2,508	2,020
Deferred income tax expense	-973	-1,154
Net realized gains on investments	-3,259	-794
Excess tax benefits from stock-based compensation	-1,136	-170
Other	188	562
Change in operating assets and liabilities:	'	'
Premiums receivable	-15,015	-30,082
Reinsurance recoverable for paid and unpaid losses	7,359	7,206
Federal income taxes	1,382	855
Unpaid losses and loss adjustment expenses	27,687	26,759
Unearned premiums	16,711	24,168
Accounts payable, accrued expenses and other liabilities	-3,376	4,378
Deferred reinsurance gain—LPT Agreement	-3,875	-3,577
Contingent commission receivable—LPT Agreement	-424	-385
Other	-3,353	808
Net cash provided by operating activities	38,570	41,587
Investing activities	'	'
Purchase of fixed maturity securities	-94,495	-90,117
Purchase of equity securities	-7,838	-5,328
Proceeds from sale of fixed maturity securities	35,061	0
Proceeds from sale of equity securities	7,872	5,284
Proceeds from maturities and redemptions of investments	42,418	39,693
Proceeds from sale of fixed assets	0	113
Capital expenditures	-1,447	-1,355
Restricted cash and cash equivalents (used in) provided by investing activities	-2,371	659
Net cash used in investing activities	-20,800	-51,051
Financing activities	'	'
Cash transactions related to stock-based compensation	-412	1,374
Dividends paid to stockholders	-1,879	-1,852
Excess tax benefits from stock-based compensation, financing activities	1,136	170
Net cash used in financing activities	-1,155	-308
Net increase (decrease) in cash and cash equivalents	16,615	-9,772
Cash and cash equivalents at the beginning of the period	34,503	140,661
Cash and cash equivalents at the end of the period	$51,118	$130,889

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
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.
	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 Annual Report on Form 10-K for the year ended December 31, 2013.
	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. Currently, the Company has one operating segment, workers’ compensation insurance and related services.
	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, as well as 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, deferred income taxes, valuation of investments, and the valuation of goodwill and intangible assets.
	Reclassifications
	Certain prior period information has been reclassified to conform to the current period presentation.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2014
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 were as follows:
			March 31, 2014				December 31, 2013
			Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
			(in thousands)
	Financial assets
	Investments		$	2,375,087	$	2,375,087	$	2,344,858	$	2,344,858
	Cash and cash equivalents		51,118		51,118		34,503		34,503
	Restricted cash and cash equivalents		8,935		8,935		6,564		6,564
	Financial liabilities
	Notes payable		102,000		105,579		102,000		105,450
	The Company's estimates of fair value for financial liabilities are based on a combination of the variable interest rates for the Company's existing line of credit and other notes with similar durations to discount the projection of future payments on notes payable, and have been determined to be Level 2 fair value measurements, as defined below.
	Assets and liabilities recorded at fair value on the 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 following methods and assumptions were used to determine the fair value of each class of assets and liabilities recorded at fair value in the consolidated balance sheets.
	Fair value of available-for-sale fixed maturity and equity securities is based on quoted market prices, where available, and is obtained primarily from third-party pricing services, which generally use Level 1 or Level 2 inputs. The Company obtains a quoted price for each security from third party pricing services. The quoted prices are derived through recently reported trades for identical or similar securities. For securities not actively traded, the 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 speeds. The Company also performs a quarterly analysis on the prices received from third party pricing services 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. If differences are noted in this review, the Company may obtain additional information from other pricing services to validate the quoted price. There were no adjustments to prices obtained from third party pricing services as of March 31, 2014 or December 31, 2013 that were material to the Company's consolidated financial statements.
	If quoted market prices and an estimate determined by using objectively verifiable information are unavailable, the Company produces an estimate of fair value based on internally developed valuation techniques, which, depending on the level of observable market inputs, will render the fair value estimate as Level 2 or Level 3. The Company bases all of its estimates of fair value for assets on the bid price as it represents what a third-party market participant would be willing to pay in an arm's length transaction.
	These methods of valuation will only produce an estimate of fair value if there is objectively verifiable information to produce a valuation. If objectively verifiable information is not available, the Company would be required to produce an estimate of fair value using some of the same methodologies, making assumptions for market-based inputs that are unavailable.
	Estimates of fair value for fixed maturity securities are based on estimates using objectively verifiable information and are included in the amount disclosed in Level 2 of the hierarchy. The Level 3 fair value estimates include the Company's assumptions about risk assessments and market participant assumptions based on the best information available, including quotes from market makers and other broker/dealers recognized as market participants, using standard or trade derived inputs, new issue data, monthly payment information, cash flow generation, prepayment speeds, spread adjustments, or rating updates.
	The following table presents the items on the accompanying consolidated balance sheets that are stated at fair value and the corresponding fair value measurements.
			March 31, 2014						December 31, 2013
			Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
			(in thousands)
	Fixed maturity securities
	U.S. Treasuries		$	—	$	174,487	$	—	$	—	$	170,897	$	—
	U.S. Agencies		—		58,947		—		—		68,118		—
	States and municipalities		—		763,913		—		—		735,180		—
	Corporate securities		—		838,859		—		—		833,296		—
	Residential mortgage-backed securities		—		261,392		—		—		258,431		—
	Commercial mortgage-backed securities		—		64,063		—		—		65,110		—
	Asset-backed securities		—		49,498		—		—		51,514		—
	Total fixed maturity securities		—		2,211,159		—		—		2,182,546		—
	Equity securities		$	163,928	$	—	$	—	$	162,312	$	—	$	—

Investments

Investments	3 Months Ended
	Mar. 31, 2014
Investments [Abstract]	'
Investments	'
	Investments
	The cost or amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the Company’s investments were as follows:
			Cost or Amortized			Gross			Gross				Estimated
			Cost			Unrealized			Unrealized				Fair Value
						Gains			Losses
			(in thousands)
	At March 31, 2014
	Fixed maturity securities
	U.S. Treasuries		$	167,437		$	7,148		$	(98	)		$	174,487
	U.S. Agencies		55,912			3,035			—				58,947
	States and municipalities		724,093			41,784			(1,964		)		763,913
	Corporate securities		812,448			32,007			(5,596		)		838,859
	Residential mortgage-backed securities		256,573			8,136			(3,317		)		261,392
	Commercial mortgage-backed securities		65,326			317			(1,580		)		64,063
	Asset-backed securities		49,592			38			(132		)		49,498
	Total fixed maturity securities		2,131,381			92,465			(12,687		)		2,211,159
	Equity securities		92,139			72,074			(285		)		163,928
	Total investments		$	2,223,520		$	164,539		$	(12,972	)		$	2,375,087
	At December 31, 2013
	Fixed maturity securities
	U.S. Treasuries		$	163,951		$	7,073		$	(127	)		$	170,897
	U.S. Agencies		64,985			3,137			(4		)		68,118
	States and municipalities		698,979			40,595			(4,394		)		735,180
	Corporate securities		814,283			28,671			(9,658		)		833,296
	Residential mortgage-backed securities		255,187			7,979			(4,735		)		258,431
	Commercial mortgage-backed securities		67,066			316			(2,272		)		65,110
	Asset-backed securities		51,613			54			(153		)		51,514
	Total fixed maturity securities		2,116,064			87,825			(21,343		)		2,182,546
	Equity securities		89,689			72,844			(221		)		162,312
	Total investments		$	2,205,753		$	160,669		$	(21,564	)		$	2,344,858
	The amortized cost and estimated fair value of fixed maturity securities at March 31, 2014, 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 thousands)
	Due in one year or less		$	168,513		$	170,981
	Due after one year through five years		788,571			827,533
	Due after five years through ten years		622,761			646,256
	Due after ten years		180,045			191,436
	Mortgage and asset-backed securities		371,491			374,953
	Total		$	2,131,381		$	2,211,159
	The following is a summary of 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 March 31, 2014 and December 31, 2013.
			March 31, 2014									December 31, 2013
			Estimated Fair Value			Gross Unrealized Losses			Number of Issues			Estimated Fair Value			Gross Unrealized Losses			Number of Issues
			(dollars in thousands)
	Less than 12 months:
	Fixed maturity securities
	U.S. Treasuries		$	26,401		$	(98	)	8			$	22,242		$	(127	)	7
	U.S. Agencies		—			—			—			1,631			(4		)	1
	States and municipalities		121,190			(1,964		)	30			127,965			(4,394		)	34
	Corporate securities		223,951			(5,511		)	79			326,608			(9,536		)	112
	Residential mortgage-backed securities		101,876			(2,855		)	51			129,586			(4,170		)	58
	Commercial mortgage-backed securities		24,812			(896		)	8			35,878			(1,372		)	9
	Asset-backed securities		25,580			(45		)	12			25,825			(52		)	13
	Total fixed maturity securities		523,810			(11,369		)	188			669,735			(19,655		)	234
	Equity securities		6,639			(270		)	15			6,140			(208		)	17
	Total less than 12 months		$	530,449		$	(11,639	)	203			$	675,875		$	(19,863	)	251
	12 months or greater:
	Fixed maturity securities
	Corporate securities		$	6,617		$	(85	)	3			$	6,174		$	(122	)	3
	Residential mortgage-backed securities		5,269			(462		)	10			5,609			(565		)	11
	Commercial mortgage-backed securities		9,529			(684		)	3			9,324			(900		)	3
	Asset-backed securities		8,949			(87		)	3			8,938			(101		)	3
	Total fixed maturity securities		30,364			(1,318		)	19			30,045			(1,688		)	20
	Equity securities		302			(15		)	1			303			(13		)	1
Total 12 months or greater		$	30,666		$	(1,333	)	20			$	30,348		$	(1,701	)	21
Total available-for-sale:
Fixed maturity securities
U.S. Treasuries		$	26,401		$	(98	)	8			$	22,242		$	(127	)	7
U.S. Agencies		—			—			—			1,631			(4		)	1
States and municipalities		121,190			(1,964		)	30			127,965			(4,394		)	34
Corporate securities		230,568			(5,596		)	82			332,782			(9,658		)	115
Residential mortgage-backed securities		107,145			(3,317		)	61			135,195			(4,735		)	69
Commercial mortgage-backed securities		34,341			(1,580		)	11			45,202			(2,272		)	12
Asset-backed securities		34,529			(132		)	15			34,763			(153		)	16
Total fixed maturity securities		554,174			(12,687		)	207			699,780			(21,343		)	254
Equity securities		6,941			(285		)	16			6,443			(221		)	18
Total available-for-sale		$	561,115		$	(12,972	)	223			$	706,223		$	(21,564	)	272
Based on reviews of the fixed maturity securities, the Company determined that unrealized losses for the three months ended March 31, 2014 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 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 until fair value recovers to above cost, or maturity.
Based on reviews of the equity securities for the three months ended March 31, 2014, the Company determined that unrealized losses as of that date were not considered to be other-than-temporary due to the financial condition and near-term prospects of the issuers.
Net realized gains on investments and the change in unrealized gains (losses) on fixed maturity and equity securities are determined on a specific-identification basis and were as follows:
		Three Months Ended
		March 31,
		2014			2013
	(in thousands)
Net realized gains on investments
Fixed maturity securities
Gross gains		$	777		$	—
Gross losses		(1		)	—
Net realized gains on fixed maturity securities		$	776		$	—
Equity securities
Gross gains		$	2,485		$	1,045
Gross losses		(2		)	(251		)
Net realized gains on equity securities		$	2,483		$	794
Total		$	3,259		$	794
Change in unrealized gains (losses)
Fixed maturity securities		$	13,296		$	(12,231	)
Equity securities		(834		)	11,477
Total		$	12,462		$	(754	)
Net investment income was as follows:
		Three Months Ended
		March 31,
		2014			2013
	(in thousands)
Fixed maturity securities		$	17,641		$	17,246
Equity securities		953			837
Cash equivalents and restricted cash		19			35
		18,613			18,118
Investment expenses		(600		)	(713		)
Net investment income		$	18,013		$	17,405
The Company is required by various state laws and regulations to keep securities or letters of credit in depository accounts with certain states in which it does business. As of March 31, 2014 and December 31, 2013, securities having a fair value of $777.6 million and $602.4 million, respectively, were on deposit. These laws and regulations govern not only the amount, but also the types of securities that are eligible for deposit. The deposits are limited to fixed maturity securities in all states. Additionally, certain reinsurance contracts require Company 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 held in trust for the benefit of ceding reinsurers at March 31, 2014 and December 31, 2013 was $32.3 million and $32.2 million, respectively. Pursuant to the Amended Credit Facility, a portion of the Company's debt was secured by fixed maturity securities and restricted cash and cash equivalents that had a fair value of $85.8 million and $95.1 million at March 31, 2014 and December 31, 2013, respectively.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
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 following is a reconciliation of the federal statutory income tax rate to the Company’s effective tax rates for the periods presented.
		Three Months Ended
		March 31,
		2014		2013
	Expense computed at statutory rate	35	%	35	%
	Dividends received deduction and tax-exempt interest	(16.0	)	(25.0	)
	LPT deferred gain amortization	(8.5	)	(14.4	)
	LPT reserve adjustment	(0.4	)	—
	Other	0.8		1.3
	Effective tax rate	10.9	%	(3.1	)%

Liability_for_Unpaid_Losses_an

Liability for Unpaid Losses and Loss Adjustment Expenses	3 Months Ended
	Mar. 31, 2014
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
		March 31,
		2014		2013
		(in thousands)
	Unpaid losses and LAE, gross of reinsurance, at beginning of period	$	2,330,491	$	2,231,540
	Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	743,055		805,386
	Net unpaid losses and LAE at beginning of period	1,587,436		1,426,154
	Losses and LAE, net of reinsurance, related to:
	Current period	124,804		111,104
	Prior periods	1,751		1,130
	Total net losses and LAE incurred during the period	126,555		112,234
	Deduct payments for losses and LAE, net of reinsurance, related to:
	Current period	4,530		5,064
	Prior periods	87,125		73,571
	Total net payments for losses and LAE during the period	91,655		78,635
	Ending unpaid losses and LAE, net of reinsurance	1,622,336		1,459,753
	Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	735,842		798,546
	Unpaid losses and LAE, gross of reinsurance, at end of period	$	2,358,178	$	2,258,299
	Total net losses and LAE included in the above table excludes the impact of the amortization of the deferred reinsurance gain—LPT Agreement (Note 6).
	The increase in the estimates of incurred losses and LAE attributable to insured events for prior periods was primarily related to the Company's assigned risk business.

LPT_Agreement

LPT Agreement	3 Months Ended
	Mar. 31, 2014
LPT Agreement [Abstract]	'
LPT Agreement	'
	LPT Agreement
	The Company is party to a 100% quota share retroactive reinsurance agreement (LPT Agreement) under which $1.5 billion in liabilities for losses and LAE related to claims incurred by EICN prior to July 1, 1995 were reinsured for consideration of $775.0 million. The LPT Agreement provides coverage up to $2.0 billion. The initial Deferred Gain resulting from the LPT Agreement was recorded as a liability in the accompanying consolidated balance sheets as Deferred reinsurance gain–LPT Agreement. The Company is also entitled to receive a contingent profit commission under the LPT Agreement. The contingent profit commission is an amount based on the favorable difference between actual paid losses and LAE and expected paid losses and LAE as established in the LPT Agreement. 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 on 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 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 $4.3 million and $4.0 million of the Deferred Gain for the three months ended March 31, 2014 and 2013, respectively. The remaining Deferred Gain was $245.2 million and $249.1 million as of March 31, 2014 and December 31, 2013, respectively. The estimated remaining liabilities subject to the LPT Agreement were $603.5 million and $612.1 million as of March 31, 2014 and December 31, 2013, respectively. Losses and LAE paid with respect to the LPT Agreement totaled $645.5 million and $637.9 million through March 31, 2014 and December 31, 2013, respectively.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income [Abstract]	'
Accumulated Other Comprehensive Income, Net	'
	Accumulated Other Comprehensive Income, net
	Accumulated other comprehensive income, net, is comprised of unrealized gains on investments classified as available-for-sale, net of deferred tax expense. The following table summarizes the components of accumulated other comprehensive income, net:
		March 31, 2014			December 31, 2013
		(in thousands)
	Net unrealized gain on investments, before taxes	$	151,567		$	139,105
	Deferred tax expense on net unrealized gains	(53,049		)	(48,687		)
	Total accumulated other comprehensive income, net	$	98,518		$	90,418

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2014
Stock-Based Compensation [Abstract]	'
Stock-Based compensation	'
	Stock-Based Compensation
	The Company awarded stock options, restricted stock units (RSUs) and performance share units (PSUs) to certain officers of the Company as follows:
		Number Awarded	Weighted Average Fair Value on Date of Grant		Weighted Average Exercise Price		Aggregate Fair Value on Date of Grant
							(in millions)
	Mar-14
	Stock options(1)	141,744	$	6.66	$	20.87	$	0.9
	RSUs(1)	63,878	20.87		—		1.3
	PSUs(2)	125,340	20.87		—		2.6
	-1	The stock options and RSUs awarded in March 2014 were awarded to certain officers of the Company and vest 25% on March 11, 2015, and each of the subsequent three anniversaries of that date. The stock options and RSUs are subject to accelerated vesting in certain circumstances, such as: death or disability, or in connection with change of control of the Company. The stock options expire seven years from the date of grant.
	-2	The PSUs have a performance period of three years and are subject to certain performance goals, based on the Company's statutory combined ratio, with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate target number of PSUs awarded.
	A total of 9,900 and 411,295 stock options were exercised during the three months ended March 31, 2014 and the year ended December 31, 2013, respectively.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	Basic earnings per share includes no dilution and is computed by dividing income applicable to stockholders by the weighted average number of shares outstanding for the period. Diluted earnings per share reflects the potential dilutive impact of all convertible securities on earnings per share. Diluted earnings per share includes shares assumed issued under the “treasury stock method,” which reflects the potential dilution that would occur if outstanding options were to be exercised. 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
			March 31,
			2014			2013
		(in thousands, except share data)
	Net income available to stockholders—basic and diluted		$	10,753		$	7,490
	Weighted average number of shares outstanding—basic		31,409,322			30,914,478
	Effect of dilutive securities:
	PSUs		214,121			138,495
	Stock options		277,376			259,614
	RSUs		89,151			123,463
	Dilutive potential shares		580,648			521,572
	Weighted average number of shares outstanding—diluted		31,989,970			31,436,050
	Diluted earnings per share excludes outstanding options and other common stock equivalents in periods where the inclusion of such options and common stock equivalents would be anti-dilutive. The following table presents options and RSUs that were excluded from diluted earnings per share.
			Three Months Ended
			March 31,
			2014		2013
	Options excluded as the exercise price was greater than the average market price		—		162,800
	Options, PSUs, and RSUs excluded under the treasury method as the potential proceeds on settlement or exercise price were greater than the value of shares acquired		296,844		419,191

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
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 were as follows:
		March 31, 2014				December 31, 2013
		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
		(in thousands)
	Financial assets
	Investments	$	2,375,087	$	2,375,087	$	2,344,858	$	2,344,858
	Cash and cash equivalents	51,118		51,118		34,503		34,503
	Restricted cash and cash equivalents	8,935		8,935		6,564		6,564
	Financial liabilities
	Notes payable	102,000		105,579		102,000		105,450
Fair value, assets and liabilities measured on recurring basis table	'
	The following table presents the items on the accompanying consolidated balance sheets that are stated at fair value and the corresponding fair value measurements.
		March 31, 2014						December 31, 2013
		Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
		(in thousands)
	Fixed maturity securities
	U.S. Treasuries	$	—	$	174,487	$	—	$	—	$	170,897	$	—
	U.S. Agencies	—		58,947		—		—		68,118		—
	States and municipalities	—		763,913		—		—		735,180		—
	Corporate securities	—		838,859		—		—		833,296		—
	Residential mortgage-backed securities	—		261,392		—		—		258,431		—
	Commercial mortgage-backed securities	—		64,063		—		—		65,110		—
	Asset-backed securities	—		49,498		—		—		51,514		—
	Total fixed maturity securities	—		2,211,159		—		—		2,182,546		—
	Equity securities	$	163,928	$	—	$	—	$	162,312	$	—	$	—

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2014
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 investments were as follows:
			Cost or Amortized			Gross			Gross				Estimated
			Cost			Unrealized			Unrealized				Fair Value
						Gains			Losses
			(in thousands)
	At March 31, 2014
	Fixed maturity securities
	U.S. Treasuries		$	167,437		$	7,148		$	(98	)		$	174,487
	U.S. Agencies		55,912			3,035			—				58,947
	States and municipalities		724,093			41,784			(1,964		)		763,913
	Corporate securities		812,448			32,007			(5,596		)		838,859
	Residential mortgage-backed securities		256,573			8,136			(3,317		)		261,392
	Commercial mortgage-backed securities		65,326			317			(1,580		)		64,063
	Asset-backed securities		49,592			38			(132		)		49,498
	Total fixed maturity securities		2,131,381			92,465			(12,687		)		2,211,159
	Equity securities		92,139			72,074			(285		)		163,928
	Total investments		$	2,223,520		$	164,539		$	(12,972	)		$	2,375,087
	At December 31, 2013
	Fixed maturity securities
	U.S. Treasuries		$	163,951		$	7,073		$	(127	)		$	170,897
	U.S. Agencies		64,985			3,137			(4		)		68,118
	States and municipalities		698,979			40,595			(4,394		)		735,180
	Corporate securities		814,283			28,671			(9,658		)		833,296
	Residential mortgage-backed securities		255,187			7,979			(4,735		)		258,431
	Commercial mortgage-backed securities		67,066			316			(2,272		)		65,110
	Asset-backed securities		51,613			54			(153		)		51,514
	Total fixed maturity securities		2,116,064			87,825			(21,343		)		2,182,546
	Equity securities		89,689			72,844			(221		)		162,312
	Total investments		$	2,205,753		$	160,669		$	(21,564	)		$	2,344,858
Investments classified by contractual maturity date table	'
	The amortized cost and estimated fair value of fixed maturity securities at March 31, 2014, 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 thousands)
	Due in one year or less		$	168,513		$	170,981
	Due after one year through five years		788,571			827,533
	Due after five years through ten years		622,761			646,256
	Due after ten years		180,045			191,436
	Mortgage and asset-backed securities		371,491			374,953
	Total		$	2,131,381		$	2,211,159
Unrealized loss on investments table	'
	The following is a summary of 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 March 31, 2014 and December 31, 2013.
			March 31, 2014									December 31, 2013
			Estimated Fair Value			Gross Unrealized Losses			Number of Issues			Estimated Fair Value			Gross Unrealized Losses			Number of Issues
			(dollars in thousands)
	Less than 12 months:
	Fixed maturity securities
	U.S. Treasuries		$	26,401		$	(98	)	8			$	22,242		$	(127	)	7
	U.S. Agencies		—			—			—			1,631			(4		)	1
	States and municipalities		121,190			(1,964		)	30			127,965			(4,394		)	34
	Corporate securities		223,951			(5,511		)	79			326,608			(9,536		)	112
	Residential mortgage-backed securities		101,876			(2,855		)	51			129,586			(4,170		)	58
	Commercial mortgage-backed securities		24,812			(896		)	8			35,878			(1,372		)	9
	Asset-backed securities		25,580			(45		)	12			25,825			(52		)	13
	Total fixed maturity securities		523,810			(11,369		)	188			669,735			(19,655		)	234
	Equity securities		6,639			(270		)	15			6,140			(208		)	17
	Total less than 12 months		$	530,449		$	(11,639	)	203			$	675,875		$	(19,863	)	251
	12 months or greater:
	Fixed maturity securities
	Corporate securities		$	6,617		$	(85	)	3			$	6,174		$	(122	)	3
	Residential mortgage-backed securities		5,269			(462		)	10			5,609			(565		)	11
	Commercial mortgage-backed securities		9,529			(684		)	3			9,324			(900		)	3
	Asset-backed securities		8,949			(87		)	3			8,938			(101		)	3
	Total fixed maturity securities		30,364			(1,318		)	19			30,045			(1,688		)	20
	Equity securities		302			(15		)	1			303			(13		)	1
	Total 12 months or greater		$	30,666		$	(1,333	)	20			$	30,348		$	(1,701	)	21
	Total available-for-sale:
	Fixed maturity securities
	U.S. Treasuries		$	26,401		$	(98	)	8			$	22,242		$	(127	)	7
	U.S. Agencies		—			—			—			1,631			(4		)	1
	States and municipalities		121,190			(1,964		)	30			127,965			(4,394		)	34
	Corporate securities		230,568			(5,596		)	82			332,782			(9,658		)	115
	Residential mortgage-backed securities		107,145			(3,317		)	61			135,195			(4,735		)	69
	Commercial mortgage-backed securities		34,341			(1,580		)	11			45,202			(2,272		)	12
	Asset-backed securities		34,529			(132		)	15			34,763			(153		)	16
	Total fixed maturity securities		554,174			(12,687		)	207			699,780			(21,343		)	254
	Equity securities		6,941			(285		)	16			6,443			(221		)	18
	Total available-for-sale		$	561,115		$	(12,972	)	223			$	706,223		$	(21,564	)	272
Net realized gains and change in unrealized gains (losses), available for sale securities table	'
	ealized gains on investments and the change in unrealized gains (losses) on fixed maturity and equity securities are determined on a specific-identification basis and were as follows:
			Three Months Ended
			March 31,
			2014			2013
		(in thousands)
	Net realized gains on investments
	Fixed maturity securities
	Gross gains		$	777		$	—
	Gross losses		(1		)	—
	Net realized gains on fixed maturity securities		$	776		$	—
	Equity securities
	Gross gains		$	2,485		$	1,045
	Gross losses		(2		)	(251		)
	Net realized gains on equity securities		$	2,483		$	794
	Total		$	3,259		$	794
	Change in unrealized gains (losses)
	Fixed maturity securities		$	13,296		$	(12,231	)
	Equity securities		(834		)	11,477
	Total		$	12,462		$	(754	)
Investment income table	'
	Net investment income was as follows:
			Three Months Ended
			March 31,
			2014			2013
		(in thousands)
	Fixed maturity securities		$	17,641		$	17,246
	Equity securities		953			837
	Cash equivalents and restricted cash		19			35
			18,613			18,118
	Investment expenses		(600		)	(713		)
	Net investment income		$	18,013		$	17,405

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2014
Income Taxes [Abstract]	'
Reconciliation of federal staturoty income tax rates to the effective tax rates table	'
	The following is a reconciliation of the federal statutory income tax rate to the Company’s effective tax rates for the periods presented.
		Three Months Ended
		March 31,
		2014		2013
	Expense computed at statutory rate	35	%	35	%
	Dividends received deduction and tax-exempt interest	(16.0	)	(25.0	)
	LPT deferred gain amortization	(8.5	)	(14.4	)
	LPT reserve adjustment	(0.4	)	—
	Other	0.8		1.3
	Effective tax rate	10.9	%	(3.1	)%

Liability_for_Unpaid_Losses_an1

Liability for Unpaid Losses and Loss Adjustment Expenses (Tables)	3 Months Ended
	Mar. 31, 2014
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
		March 31,
		2014		2013
		(in thousands)
	Unpaid losses and LAE, gross of reinsurance, at beginning of period	$	2,330,491	$	2,231,540
	Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	743,055		805,386
	Net unpaid losses and LAE at beginning of period	1,587,436		1,426,154
	Losses and LAE, net of reinsurance, related to:
	Current period	124,804		111,104
	Prior periods	1,751		1,130
	Total net losses and LAE incurred during the period	126,555		112,234
	Deduct payments for losses and LAE, net of reinsurance, related to:
	Current period	4,530		5,064
	Prior periods	87,125		73,571
	Total net payments for losses and LAE during the period	91,655		78,635
	Ending unpaid losses and LAE, net of reinsurance	1,622,336		1,459,753
	Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	735,842		798,546
	Unpaid losses and LAE, gross of reinsurance, at end of period	$	2,358,178	$	2,258,299

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income [Abstract]	'
Schedule of accumulated other comprehensive income (loss) table	'
	The following table summarizes the components of accumulated other comprehensive income, net:
		March 31, 2014			December 31, 2013
		(in thousands)
	Net unrealized gain on investments, before taxes	$	151,567		$	139,105
	Deferred tax expense on net unrealized gains	(53,049		)	(48,687		)
	Total accumulated other comprehensive income, net	$	98,518		$	90,418

StockBased_Compensation_StockB

Stock-Based Compensation Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
Stock-Based Compensation [Abstract]	'
Share-based compensation arrangements by share-based payment award table	'
	The Company awarded stock options, restricted stock units (RSUs) and performance share units (PSUs) to certain officers of the Company as follows:
		Number Awarded	Weighted Average Fair Value on Date of Grant		Weighted Average Exercise Price		Aggregate Fair Value on Date of Grant
							(in millions)
	Mar-14
	Stock options(1)	141,744	$	6.66	$	20.87	$	0.9
	RSUs(1)	63,878	20.87		—		1.3
	PSUs(2)	125,340	20.87		—		2.6
	-1	The stock options and RSUs awarded in March 2014 were awarded to certain officers of the Company and vest 25% on March 11, 2015, and each of the subsequent three anniversaries of that date. The stock options and RSUs are subject to accelerated vesting in certain circumstances, such as: death or disability, or in connection with change of control of the Company. The stock options expire seven years from the date of grant.
	-2	The PSUs have a performance period of three years and are subject to certain performance goals, based on the Company's statutory combined ratio, with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate target number of PSUs awarded.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
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
			March 31,
			2014			2013
		(in thousands, except share data)
	Net income available to stockholders—basic and diluted		$	10,753		$	7,490
	Weighted average number of shares outstanding—basic		31,409,322			30,914,478
	Effect of dilutive securities:
	PSUs		214,121			138,495
	Stock options		277,376			259,614
	RSUs		89,151			123,463
	Dilutive potential shares		580,648			521,572
	Weighted average number of shares outstanding—diluted		31,989,970			31,436,050
Antidilutive securities excluded from computation of earnings per share table	'
	The following table presents options and RSUs that were excluded from diluted earnings per share.
			Three Months Ended
			March 31,
			2014		2013
	Options excluded as the exercise price was greater than the average market price		—		162,800
	Options, PSUs, and RSUs excluded under the treasury method as the potential proceeds on settlement or exercise price were greater than the value of shares acquired		296,844		419,191

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Investments	$2,375,087	$2,344,858	'	'
Investments, fair value	2,375,087	2,344,858	'	'
Cash and cash equivalents	51,118	34,503	130,889	140,661
Cash and cash equivalents, estimated fair value	51,118	34,503	'	'
Restricted cash and cash equivalents	8,935	6,564	'	'
Notes payable	102,000	102,000	'	'
Notes Payable, fair value	105,579	105,450	'	'
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Restricted cash and cash equivalents	$8,935	$6,564	'	'

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments, Fair Value Inputs (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	$2,375,087	$2,344,858
Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	2,211,159	2,182,546
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
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	2,211,159	2,182,546
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
US Treasury Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	174,487	170,897
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
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	'	170,897
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
US Government Agencies Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	58,947	68,118
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
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	'	68,118
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
US States and Political Subdivisions Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	763,913	735,180
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
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	'	735,180
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
Corporate Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	838,859	833,296
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
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	'	833,296
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
Residential Mortgage Backed Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	261,392	258,431
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
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	'	258,431
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
Commercial Mortgage Backed Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	64,063	65,110
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
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	'	65,110
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
Asset-backed Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	49,498	51,514
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
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	'	51,514
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
Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	163,928	162,312
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	'	162,312
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
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

Investments_Details

Investments (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	$2,223,520	$2,205,753
Gross unrealized gains	164,539	160,669
Gross unrealized losses	-12,972	-21,564
Investments	2,375,087	2,344,858
Deposit Assets	'	'
Investments	2,375,087	2,344,858
Assets Held-in-trust	'	'
Investments	2,375,087	2,344,858
Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	2,131,381	2,116,064
Gross unrealized gains	92,465	87,825
Gross unrealized losses	-12,687	-21,343
Investments	2,211,159	2,182,546
Deposit Assets	'	'
Investments	2,211,159	2,182,546
Assets Held-in-trust	'	'
Investments	2,211,159	2,182,546
US Treasury Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	167,437	163,951
Gross unrealized gains	7,148	7,073
Gross unrealized losses	-98	-127
Investments	174,487	170,897
Deposit Assets	'	'
Investments	174,487	170,897
Assets Held-in-trust	'	'
Investments	174,487	170,897
US Government Agencies Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	55,912	64,985
Gross unrealized gains	3,035	3,137
Gross unrealized losses	0	-4
Investments	58,947	68,118
Deposit Assets	'	'
Investments	58,947	68,118
Assets Held-in-trust	'	'
Investments	58,947	68,118
US States and Political Subdivisions Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	724,093	698,979
Gross unrealized gains	41,784	40,595
Gross unrealized losses	-1,964	-4,394
Investments	763,913	735,180
Deposit Assets	'	'
Investments	763,913	735,180
Assets Held-in-trust	'	'
Investments	763,913	735,180
Corporate Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	812,448	814,283
Gross unrealized gains	32,007	28,671
Gross unrealized losses	-5,596	-9,658
Investments	838,859	833,296
Deposit Assets	'	'
Investments	838,859	833,296
Assets Held-in-trust	'	'
Investments	838,859	833,296
Residential Mortgage Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	256,573	255,187
Gross unrealized gains	8,136	7,979
Gross unrealized losses	-3,317	-4,735
Investments	261,392	258,431
Deposit Assets	'	'
Investments	261,392	258,431
Assets Held-in-trust	'	'
Investments	261,392	258,431
Commercial Mortgage Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	65,326	67,066
Gross unrealized gains	317	316
Gross unrealized losses	-1,580	-2,272
Investments	64,063	65,110
Deposit Assets	'	'
Investments	64,063	65,110
Assets Held-in-trust	'	'
Investments	64,063	65,110
Asset-backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	49,592	51,613
Gross unrealized gains	38	54
Gross unrealized losses	-132	-153
Investments	49,498	51,514
Deposit Assets	'	'
Investments	49,498	51,514
Assets Held-in-trust	'	'
Investments	49,498	51,514
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	92,139	89,689
Gross unrealized gains	72,074	72,844
Gross unrealized losses	-285	-221
Investments	163,928	162,312
Deposit Assets	'	'
Investments	163,928	162,312
Assets Held-in-trust	'	'
Investments	163,928	162,312
Portion at Fair Value Measurement [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments	32,300	32,200
Deposit Assets	'	'
Investments	32,300	32,200
Assets Held-in-trust	'	'
Investments	32,300	32,200
Portion at Fair Value Measurement [Member] | Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments	777,600	602,400
Deposit Assets	'	'
Investments	777,600	602,400
Assets Held-in-trust	'	'
Investments	777,600	602,400
Portion at Fair Value Measurement [Member] | Fixed Maturities and Restricted Cash Equivalents [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments	85,800	95,100
Deposit Assets	'	'
Investments	85,800	95,100
Assets Held-in-trust	'	'
Investments	$85,800	$95,100

Investments_Amortized_Cost_and

Investments, Amortized Cost and Estimated Fair Value (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Amortized Cost	'	'
Due in one year or less, amortized cost	$168,513	'
Due after one year through five years, amortized cost	788,571	'
Due after five years through ten years, amortized cost	622,761	'
Due after ten years, amortized cost	180,045	'
Mortgage and asset-backed securities, amortized cost	371,491	'
Total, amortized cost	2,131,381	'
Estimated Fair Value	'	'
Due in one year or less, fair value	170,981	'
Due after one year through five years, fair value	827,533	'
Due after five years through ten years, fair value	646,256	'
Due after ten years, fair value	191,436	'
Mortgage and asset-backed securities, fair value	374,953	'
Total, fair value	$2,211,159	$2,182,546

Investments_Continuous_Loss_Po

Investments, Continuous Loss Position (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	$530,449,000	$675,875,000
Estimated fair value, 12 months or greater	30,666,000	30,348,000
Estimated fair value, total	561,115,000	706,223,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-11,639,000	-19,863,000
Gross unrealized losses, 12 months or greater	-1,333,000	-1,701,000
Estimated unrealized losses, total	-12,972,000	-21,564,000
Number of issues in loss position, less than 12 months	203	251
Number of Issues in loss position, 12 months or greater	20	21
Number of issues loss position, aggregate	223	272
Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	523,810,000	669,735,000
Estimated fair value, 12 months or greater	30,364,000	30,045,000
Estimated fair value, total	554,174,000	699,780,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-11,369,000	-19,655,000
Gross unrealized losses, 12 months or greater	-1,318,000	-1,688,000
Estimated unrealized losses, total	-12,687,000	-21,343,000
Number of issues in loss position, less than 12 months	188	234
Number of Issues in loss position, 12 months or greater	19	20
Number of issues loss position, aggregate	207	254
US Treasury Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	26,401,000	22,242,000
Estimated fair value, total	26,401,000	22,242,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-98,000	-127,000
Estimated unrealized losses, total	-98,000	-127,000
Number of issues in loss position, less than 12 months	8	7
Number of issues loss position, aggregate	8	7
US Government Agencies Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	0	1,631,000
Estimated fair value, total	0	1,631,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	0	-4,000
Estimated unrealized losses, total	0	-4,000
Number of issues in loss position, less than 12 months	0	1
Number of issues loss position, aggregate	0	1
US States and Political Subdivisions Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	121,190,000	127,965,000
Estimated fair value, total	121,190,000	127,965,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-1,964,000	-4,394,000
Estimated unrealized losses, total	-1,964,000	-4,394,000
Number of issues in loss position, less than 12 months	30	34
Number of issues loss position, aggregate	30	34
Corporate Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	223,951,000	326,608,000
Estimated fair value, 12 months or greater	6,617,000	6,174,000
Estimated fair value, total	230,568,000	332,782,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-5,511,000	-9,536,000
Gross unrealized losses, 12 months or greater	-85,000	-122,000
Estimated unrealized losses, total	-5,596,000	-9,658,000
Number of issues in loss position, less than 12 months	79	112
Number of Issues in loss position, 12 months or greater	3	3
Number of issues loss position, aggregate	82	115
Residential Mortgage Backed Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	101,876,000	129,586,000
Estimated fair value, 12 months or greater	5,269,000	5,609,000
Estimated fair value, total	107,145,000	135,195,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-2,855,000	-4,170,000
Gross unrealized losses, 12 months or greater	-462,000	-565,000
Estimated unrealized losses, total	-3,317,000	-4,735,000
Number of issues in loss position, less than 12 months	51	58
Number of Issues in loss position, 12 months or greater	10	11
Number of issues loss position, aggregate	61	69
Commercial Mortgage Backed Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	24,812,000	35,878,000
Estimated fair value, 12 months or greater	9,529,000	9,324,000
Estimated fair value, total	34,341,000	45,202,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-896,000	-1,372,000
Gross unrealized losses, 12 months or greater	-684,000	-900,000
Estimated unrealized losses, total	-1,580,000	-2,272,000
Number of issues in loss position, less than 12 months	8	9
Number of Issues in loss position, 12 months or greater	3	3
Number of issues loss position, aggregate	11	12
Asset-backed Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	25,580,000	25,825,000
Estimated fair value, 12 months or greater	8,949,000	8,938,000
Estimated fair value, total	34,529,000	34,763,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-45,000	-52,000
Gross unrealized losses, 12 months or greater	-87,000	-101,000
Estimated unrealized losses, total	-132,000	153,000
Number of issues in loss position, less than 12 months	0	0
Number of Issues in loss position, 12 months or greater	3	3
Number of issues loss position, aggregate	0	0
Equity Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	6,639,000	6,140,000
Estimated fair value, 12 months or greater	302,000	303,000
Estimated fair value, total	6,941,000	6,443,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-270,000	-208,000
Gross unrealized losses, 12 months or greater	-15,000	-13,000
Estimated unrealized losses, total	-285,000	-221,000
Number of issues in loss position, less than 12 months	15	17
Number of Issues in loss position, 12 months or greater	1	1
Number of issues loss position, aggregate	$16	$18

Investments_Net_Realized_Gains

Investments, Net Realized Gains (Losses) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Net realized gains (losses)	'	'
Net realized gains (losses) on fixed maturity and equity securities	$3,259	$794
Change in unrealized gains (losses)	'	'
Change in unrealized gains (losses) on fixed maturity and equity securities	12,462	-754
Debt Securities [Member]	'	'
Net realized gains (losses)	'	'
Gross gains from sales	777	0
Gross losses from sales	1	0
Net realized gains (losses) on fixed maturity and equity securities	776	0
Change in unrealized gains (losses)	'	'
Change in unrealized gains (losses) on fixed maturity and equity securities	13,296	-12,231
Equity Securities [Member]	'	'
Net realized gains (losses)	'	'
Gross gains from sales	2,485	1,045
Gross losses from sales	2	251
Net realized gains (losses) on fixed maturity and equity securities	2,483	794
Change in unrealized gains (losses)	'	'
Change in unrealized gains (losses) on fixed maturity and equity securities	($834)	$11,477

Net_Investment_Income_Details

Net Investment Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Schedule of Investment Income, Reported Amounts, by Category [Line Items]	'	'
Investment income	$18,613	$18,118
Investment expenses	600	713
Net investment income	18,013	17,405
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	17,641	17,246
Equity Securities [Member]	'	'
Schedule of Investment Income, Reported Amounts, by Category [Line Items]	'	'
Investment income related to equity securities	953	837
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	$19	$35

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]	'	'
Expense computed at statutory rate	35.00%	35.00%
Dividends received deduction and tax-exempt interest	-16.00%	-25.00%
LPT deferred gain amortization	-8.50%	-14.40%
LPT reserve adjustment	-0.40%	0.00%
Other	0.80%	1.30%
Effective tax rate	10.90%	-3.10%

Liability_for_Unpaid_Losses_an2

Liability for Unpaid Losses and Loss Adjustment Expenses (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Unpaid losses and LAE, gross of reinsurance, at beginning of period	$2,330,491	$2,231,540
Less reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	743,055	805,386
Net unpaid losses and LAE at beginning of period	1,587,436	1,426,154
Losses and LAE, net of reinsurance, related to:	'	'
Current period	124,804	111,104
Prior periods	1,751	1,130
Total net losses and LAE incurred during the period	126,555	112,234
Deduct payments for losses and LAE, net of reinsurance, related to:	'	'
Current period	4,530	5,064
Prior periods	87,125	73,571
Total net payments for losses and LAE during the period	91,655	78,635
Ending unpaid losses and LAE, net of reinsurance	1,622,336	1,459,753
Reinsurance recoverable, excluding bad debt allowance, on unpaid losses and LAE	735,842	798,546
Unpaid losses and LAE, gross of reinsurance, at end of period	$2,358,178	$2,258,299

LPT_Agreement_LPT_Agreement_De

LPT Agreement LPT Agreement (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Reinsurance Agreement [Line Items]	'	'	'
Reinsurance quota share, percentage	100.00%	'	'
Liabilities for the incurred but unpaid losses and LAE related to claims prior to July 1, 1995	$1,500,000,000	'	'
Ceded premiums written	775,000,000	'	'
Amortization of deferred gain	4,300,000	4,000,000	'
Deferred reinsurance gain—LPT Agreement	245,197,000	'	249,072,000
Estimated remaining liabilities - LPT Agreement	603,500,000	'	612,100,000
Paid losses and LAE claims related to LPT	645,500,000	'	637,900,000
Indemnification Agreement [Member]	'	'	'
Reinsurance Agreement [Line Items]	'	'	'
Coverage provided under LPT Agreement	$2,000,000,000	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'
Net unrealized gain on investments, before taxes	$151,567	$139,105
Deferred tax expense on net unrealized gains	-53,049	-48,687
Total accumulated other comprehensive income, net	$98,518	$90,418

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Stock-options exercised	9,900		411,295
Officer [Member]	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Vesting rights for options awarded	'vest 25% on March 11, 2015, and each of the subsequent three anniversaries of that date		'
Expiration Period for Options Awarded	'seven years		'
Performance share awards performance period	'three years		'
Performance share awards, minimum payout	0.00%		'
Performane share awards, maximum payout	200.00%		'
Stock Option [Member]	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Share-based compensation award, shares issued	141,744	[1]	'
Share-based compensation options, exercise price on grant date	6.66	[1]	'
Share-based compensation award, fair value assumptions, exercise price	20.87	[1]	'
Fair value of awards awarded on grant date	0.9	[1]	'
Restricted Stock Units (RSUs) [Member]	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Share-based compensation award, shares issued	63,878	[1]	'
Share-based compensation options, exercise price on grant date	20.87	[2]	'
Share-based compensation award, fair value assumptions, exercise price	0		'
Fair value of awards awarded on grant date	1.3	[1]	'
Performance Shares [Member]	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Share-based compensation award, shares issued	125,340	[2]	'
Share-based compensation options, exercise price on grant date	20.87	[2]	'
Share-based compensation award, fair value assumptions, exercise price	0		'
Fair value of awards awarded on grant date	2.6	[2]	'
[1]	The stock options and RSUs awarded in March 2014 were awarded to certain officers of the Company and vest 25% on March 11, 2015, and each of the subsequent three anniversaries of that date. The stock options and RSUs are subject to accelerated vesting in certain circumstances, such as: death or disability, or in connection with change of control of the Company. The stock options expire seven years from the date of grant.(2)
[2]	The PSUs have a performance period of three years and are subject to certain performance goals, based on the Company's statutory combined ratio, with payouts that range from 0% to 200% of the target awards. The value shown in the table represents the aggregate target number of PSUs awarded.

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share, Basic and Diluted, by Common Class [Line Items]	'	'
Net income available to stockholders - basic and diluted	$10,753	$7,490
Weighted average number of shares outstanding - basic	31,409,322	30,914,478
Effect of dilutive securities:	'	'
Dilutive securities	580,648	521,572
Weighted average number of shares outstanding - diluted	31,989,970	31,436,050
Antidilutive securities excluded from computation of earnings per share	0	162,800
Antidilutive securites excluded under the treasury method from computation of earnings per share	296,844	419,191
Employee Stock Option [Member]	'	'
Effect of dilutive securities:	'	'
Dilutive securities	277,376	259,614
Restricted Stock Units (RSUs) [Member]	'	'
Effect of dilutive securities:	'	'
Dilutive securities	89,151	123,463
Performance Shares [Member]	'	'
Effect of dilutive securities:	'	'
Dilutive securities	214,121	138,495