Employers (EIG) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document and Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
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	'	31,210,749
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Available for sale:	'	'
Fixed maturity securities at fair value (amortized cost $2,022,240 at September 30, 2013 and $1,869,142 at December 31, 2012)	$2,101,357	$2,024,428
Equity securities at fair value (cost $86,384 at September 30, 2013 and $81,067 at December 31, 2012)	147,595	125,086
Total investments	2,248,952	2,149,514
Cash and cash equivalents	99,823	140,661
Restricted cash and cash equivalents	6,078	5,353
Accrued investment income	19,100	19,356
Premiums receivable (less bad debt allowance of $7,397 at September 30, 2013 and $5,957 at December 31, 2012)	282,940	223,011
Reinsurance recoverable for:	'	'
Paid losses	8,946	9,467
Unpaid losses	779,842	805,386
Deferred policy acquisition costs	45,682	38,852
Deferred income taxes, net	52,356	26,231
Property and equipment, net	16,490	14,680
Intangible assets, net	9,881	10,558
Goodwill	36,192	36,192
Contingent commission receivable—LPT Agreement	21,388	19,141
Other assets	17,846	12,937
Total assets	3,645,516	3,511,339
Claims and policy liabilities:	'	'
Unpaid losses and loss adjustment expenses	2,305,307	2,231,540
Unearned premiums	318,983	265,149
Total claims and policy liabilities	2,624,290	2,496,689
Commissions and premium taxes payable	44,493	40,825
Accounts payable and accrued expenses	20,333	19,522
Deferred reinsurance gain—LPT Agreement	260,602	281,043
Notes payable	112,000	112,000
Other liabilities	27,269	21,879
Total liabilities	3,088,987	2,971,958
Commitments and contingencies	'	'
Stockholders’ equity:	'	'
Common stock, $0.01 par value; 150,000,000 shares authorized; 54,579,523 and 54,144,453 shares issued and 31,206,549 and 30,771,479 shares outstanding at September 30, 2013 and December 31, 2012, respectively	546	541
Preferred stock, $0.01 par value; 25,000,000 shares authorized; none issued	0	0
Additional paid-in capital	337,403	325,991
Retained earnings	489,916	445,850
Accumulated other comprehensive income, net	91,214	129,549
Treasury stock, at cost (23,372,974 shares at September 30, 2013 and December 31, 2012)	-362,550	-362,550
Total stockholders’ equity	556,529	539,381
Total liabilities and stockholders’ equity	$3,645,516	$3,511,339

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Available for sale:	'	'
Fixed maturity securities, amortized cost	$2,108,624	$1,950,209
Premiums receivable, bad debt allowance	7,397	5,957
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)	54,579,523	54,144,453
Common stock, shares outstanding (in shares)	31,206,549	30,771,479
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	2,022,240	1,869,142
Equity Securities [Member]	'	'
Available for sale:	'	'
Fixed maturity securities, amortized cost	$86,384	$81,067

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues	'	'	'	'
Net premiums earned	$164,429	$131,766	$472,357	$360,621
Net investment income	17,799	17,506	52,849	54,188
Realized gains on investments, net	1,075	1,838	5,735	4,561
Other income	29	30	276	225
Total revenues	183,332	151,140	531,217	419,595
Expenses	'	'	'	'
Losses and loss adjustment expenses	105,767	96,823	326,677	265,150
Commission expense	19,946	16,681	58,466	47,118
Underwriting and other operating expenses	32,493	30,147	96,282	93,452
Interest expense	815	896	2,420	2,656
Total expenses	159,021	144,547	483,845	408,376
Net income before income taxes	24,311	6,593	47,372	11,219
Income tax benefit	-3,274	-1,173	-2,291	-7,903
Net income	27,585	7,766	49,663	19,122
Earnings per common share (Note 11):	'	'	'	'
Basic	$0.88	$0.25	$1.60	$0.60
Diluted	$0.86	$0.25	$1.56	$0.60
Cash dividends declared per common share	$0.06	$0.06	$0.18	$0.18
Comprehensive income	'	'	'	'
Unrealized gains (losses) during the period (net of tax expense (benefit) of $2,236 and $8,639 for the three months ended September 30, 2013 and 2012, respectively, and $(18,635) and $13,963 for the nine months ended September 30, 2013 and 2012, respectively)	4,154	16,045	-34,607	25,933
Reclassification adjustment for realized gains in net income (net of taxes of $376 and $643 for the three months ended September 30, 2013 and 2012, respectively, and $2,007 and $1,596 for the nine months ended September 30, 2013 and 2012, respectively)	-699	-1,195	-3,728	-2,966
Other comprehensive income (loss), net of tax	3,455	14,850	-38,335	22,967
Total comprehensive income	31,040	22,616	11,328	42,089
Realized gains on investments, net	'	'	'	'
Net realized gains on investments before credit related impairments on fixed maturity securities	1,075	1,838	5,803	5,090
Other than temporary impairment, credit losses recognized in earnings	0	0	-68	-529
Realized gains on investments, net	$1,075	$1,838	$5,735	$4,561

Conolidated_Statements_of_Comp

Conolidated Statements of Comprehensive Income (Parentheticals) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement Parenthetical [Abstract]	'	'	'	'
Other comprehensive income (loss), unrealized holding gain (loss) on securities arising during period, tax	$2,236	$8,639	($18,635)	$13,963
Other comprehensive income (loss), reclassification adjustment for sale of securities included in net income, tax	$376	$643	$2,007	$1,595

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating activities	'	'
Net income	$49,663	$19,122
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	4,324	4,193
Stock-based compensation	5,815	3,942
Amortization of premium on investments, net	6,574	5,342
Deferred income tax expense	-5,482	-10,031
Realized gains on investments, net	-5,735	-4,561
Excess tax benefit from stock-based compensation, operating activities	-386	0
Other	1,007	860
Change in operating assets and liabilities:	'	'
Premiums receivable	-61,368	-65,455
Reinsurance recoverable for paid and unpaid losses	26,065	29,393
Federal income taxes	-925	2,054
Unpaid losses and loss adjustment expenses	73,767	32,061
Unearned premiums	53,834	75,910
Accounts payable, accrued expenses and other liabilities	6,201	1,130
Deferred reinsurance gain—LPT Agreement	-20,441	-11,501
Contingent commission receivable—LPT Agreement	-2,247	-2,450
Other	-6,622	10,584
Net cash provided by operating activities	124,044	90,593
Investing activities	'	'
Purchase of fixed maturities	-340,343	-260,797
Purchase of equity securities	-22,058	-28,336
Proceeds from sale of fixed maturities	32,706	45,799
Proceeds from sale of equity securities	22,266	13,534
Proceeds from maturities and redemptions of investments	148,418	181,640
Proceeds from sale of fixed assets	285	107
Capital expenditures	-5,552	-5,177
Restricted cash and cash equivalents (used in) provided by investing activities	-725	837
Net cash used in investing activities	-165,003	-52,393
Financing activities	'	'
Acquisition of treasury stock	0	-41,385
Cash transactions related to stock-based compensation	5,315	-209
Dividends paid to stockholders	-5,580	-5,664
Excess tax benefits from stock-based compensation, financing activities	386	0
Net cash provided by (used in) financing activities	121	-47,258
Net decrease in cash and cash equivalents	-40,838	-9,058
Cash and cash equivalents at the beginning of the period	140,661	252,300
Cash and cash equivalents at the end of the period	$99,823	'

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
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, 2012.
	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 makers 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.

Change_in_Estimate_Level_1_Not

Change in Estimate Level 1 (Notes)	9 Months Ended
	Sep. 30, 2013
Accounting Changes and Error Corrections [Abstract]	'
Accounting Changes and Error Corrections	'
	Changes in Estimates
	During the third quarter of 2013, the Company reduced its estimated reserves ceded under the Loss Portfolio Transfer Agreement (LPT Agreement) by $14.5 million. This change in estimate resulted in a $10.1 million cumulative adjustment to the deferred reinsurance gain–LPT Agreement (Deferred Gain), which was also recognized in losses and LAE in the consolidated statement of comprehensive income, so that the Deferred Gain reflects the balance that would have existed had the revised reserves been recognized at the inception of the LPT Agreement (LPT Reserve Adjustment). This change in estimate was the result of the determination in the third quarter of 2013 that an adjustment was necessary to reflect observed favorable paid loss trends. This change in estimate increased net income by $10.1 million, or $0.32 per basic and diluted share, for the three months ended September 30, 2013 and $0.33 and $0.32 per basic and diluted share, respectively, for the nine months ended September 30, 2013.
	During the third quarter of 2013, the Company reallocated $24.3 million in reserves from non-taxable periods prior to January 1, 2000 to taxable years, which reduced our effective tax rate by 10.5 percentage points for the nine months ended September 30, 2013. This change in estimate was the result of the determination in the third quarter of 2013 that a reallocation of reserves among accident years was appropriate to address a continuation of observed loss trends. The income tax impact of this change in estimate increased net income by $5.0 million, or $0.16 per basic and diluted share for the three and nine months ended September 30, 2013.

New_Accounting_Standards

New Accounting Standards	9 Months Ended
	Sep. 30, 2013
New Accounting Standards [Abstract]	'
New Accounting Standards	'
	New Accounting Standards
	In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update Number 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Topic 220). This update requires companies to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income. For other amounts that are not required under GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under GAAP that provide additional detail about those amounts. This update became effective prospectively for reporting periods beginning after December 15, 2012. The Company adopted this update beginning in the first quarter of 2013. The adoption of this new guidance did not have a material impact on the Company's consolidated financial condition or results of operations.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2013
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:
			September 30, 2013				December 31, 2012
			Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
			(in thousands)
	Financial assets
	Investments		$	2,248,952	$	2,248,952	$	2,149,514	$	2,149,514
	Cash and cash equivalents		99,823		99,823		140,661		140,661
	Restricted cash and cash equivalents		6,078		6,078		5,353		5,353
	Financial liabilities
	Notes payable		112,000		114,501		112,000		118,207
	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 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 September 30, 2013 or December 31, 2012 that were material to the 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 fair value measurements.
			September 30, 2013						December 31, 2012
			Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
			(in thousands)
	Fixed maturity securities
	U.S. Treasuries		$	—	$	159,293	$	—	$	—	$	152,490	$	—
	U.S. Agencies		—		74,623		—		—		93,967		—
	States and municipalities		—		761,801		—		—		758,516		—
	Corporate securities		—		754,226		—		—		676,243		—
	Residential mortgage-backed securities		—		258,851		—		—		252,852		—
	Commercial mortgage-backed securities		—		51,269		—		—		56,120		—
	Asset-backed securities		—		41,294		—		—		34,240		—
	Total fixed maturity securities		—		2,101,357		—		—		2,024,428		—
	Equity securities		$	147,595	$	—	$	—	$	125,086	$	—	$	—

Investments

Investments	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013
	Fixed maturity securities
	U.S. Treasuries	$	150,708		$	8,598		$	(13	)		$	159,293
	U.S. Agencies	71,058			3,565			—				74,623
	States and municipalities	721,713			43,616			(3,528		)		761,801
	Corporate securities	732,309			30,528			(8,611		)		754,226
	Residential mortgage-backed securities	252,022			9,574			(2,745		)		258,851
	Commercial mortgage-backed securities	53,044			361			(2,136		)		51,269
	Asset-backed securities	41,386			76			(168		)		41,294
	Total fixed maturity securities	2,022,240			96,318			(17,201		)		2,101,357
	Equity securities	86,384			61,617			(406		)		147,595
	Total investments	$	2,108,624		$	157,935		$	(17,607	)		$	2,248,952
	At December 31, 2012
	Fixed maturity securities
	U.S. Treasuries	$	138,839		$	13,651		$	—			$	152,490
	U.S. Agencies	88,202			5,765			—				93,967
	States and municipalities	689,776			68,740			—				758,516
	Corporate securities	627,047			49,461			(265		)		676,243
	Residential mortgage-backed securities	236,461			16,488			(97		)		252,852
	Commercial mortgage-backed securities	54,755			1,410			(45		)		56,120
	Asset-backed securities	34,062			211			(33		)		34,240
	Total fixed maturity securities	1,869,142			155,726			(440		)		2,024,428
	Equity securities	81,067			45,399			(1,380		)		125,086
	Total investments	$	1,950,209		$	201,125		$	(1,820	)		$	2,149,514
	The amortized cost and estimated fair value of fixed maturity securities at September 30, 2013, 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	$	141,285		$	143,450
	Due after one year through five years	786,373			822,971
	Due after five years through ten years	571,472			598,132
	Due after ten years	176,658			185,390
	Mortgage and asset-backed securities	346,452			351,414
	Total	$	2,022,240		$	2,101,357
	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 September 30, 2013 and December 31, 2012.
		September 30, 2013									December 31, 2012
		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	$	4,440		$	(13	)	2			$	—			$	—		—
	States and municipalities	101,983			(3,528		)	27			—				—			—
	Corporate securities	257,784			(8,453		)	94			36,338				(265		)	12
	Residential mortgage-backed securities	78,234			(2,739		)	36			14,629				(28		)	6
	Commercial mortgage-backed securities	33,681			(2,136		)	10			10,432				(45		)	4
	Asset-backed securities	30,490			(168		)	14			16,714				(33		)	5
	Total fixed maturity securities	506,612			(17,037		)	183			78,113				(371		)	27
	Equity securities	7,852			(329		)	24			11,645				(1,207		)	35
	Total less than 12 months	$	514,464		$	(17,366	)	207			$	89,758			$	(1,578	)	62
	12 months or greater:
	Fixed maturity securities
	Corporate securities	$	2,426		$	(158	)	1			$	—			$	—		—
	Residential mortgage-backed securities	498			(6		)	16			2,341				(69		)	17
	Total fixed maturity securities	2,924			(164		)	17			2,341				(69		)	17
	Equity securities	617			(77		)	1			456				(173		)	4
	Total 12 months or greater	$	3,541		$	(241	)	18			$	2,797			$	(242	)	21
	Total available-for-sale:
	Fixed maturity securities
U.S. Treasuries	$	4,440		$	(13	)	2			$	—			$	—		—
States and municipalities	101,983			(3,528		)	27			—				—			—
Corporate securities	260,210			(8,611		)	95			36,338				(265		)	12
Residential mortgage-backed securities	78,732			(2,745		)	52			16,970				(97		)	23
Commercial mortgage-backed securities	33,681			(2,136		)	10			10,432				(45		)	4
Asset-backed securities	30,490			(168		)	14			16,714				(33		)	5
Total fixed maturity securities	509,536			(17,201		)	200			80,454				(440		)	44
Equity securities	8,469			(406		)	25			12,101				(1,380		)	39
Total available-for-sale	$	518,005		$	(17,607	)	225			$	92,555			$	(1,820	)	83
Based on reviews of the fixed maturity securities, the Company determined that unrealized losses for the nine months ended September 30, 2013 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, the Company recognized an impairment of $0.1 million in the fair value of one equity security for the nine months ended September 30, 2013 as a result of the severity and duration of the change in fair value of that security.
Realized gains on investments, net, 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						Nine Months Ended
	September 30,						September 30,
	2013			2012			2013				2012
	(in thousands)
Realized gains on investments, net
Fixed maturity securities
Gross gains	$	215		$	1,138		$	216			$	3,433
Gross losses	(7		)	—			(7		)		(5		)
Realized gains on fixed maturity securities, net	$	208		$	1,138		$	209			$	3,428
Equity securities
Gross gains	$	868		$	731		$	5,845			$	1,891
Gross losses	(1		)	(31		)	(319		)		(758		)
Realized gains on equity securities, net	$	867		$	700		$	5,526			$	1,133
Total	$	1,075		$	1,838		$	5,735			$	4,561
Change in unrealized gains (losses)
Fixed maturity securities	$	(1,086	)	$	17,600		$	(76,168	)		$	21,158
Equity securities	6,401			5,246			17,191				14,177
Total	$	5,315		$	22,846		$	(58,977	)		$	35,335
Net investment income was as follows:
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2013			2012			2013				2012
	(in thousands)
Fixed maturity securities	$	17,465		$	17,161		$	51,991			$	53,261
Equity securities	950			856			2,733				2,280
Cash equivalents and restricted cash	19			134			82				546
	18,434			18,151			54,806				56,087
Investment expenses	(635		)	(645		)	(1,957		)		(1,899		)
Net investment income	$	17,799		$	17,506		$	52,849			$	54,188
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 September 30, 2013 and December 31, 2012, securities having a fair value of $603.4 million and $530.6 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 September 30, 2013 and December 31, 2012 was $32.1 million and $35.0 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 $100.6 million and $110.4 million at September 30, 2013 and December 31, 2012, respectively.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
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.
		Nine Months Ended
		September 30,
		2013		2012
	Expense computed at statutory rate	35	%	35	%
	Dividends received deduction and tax-exempt interest	(15.0	)	(65.3	)
	LPT deferred gain amortization	(9.3	)	(44.7	)
	LPT Reserve Adjustment	(6.0	)	—
	Pre-privatization reserve adjustment, excluding LPT	(10.5	)	—
	Other	1		4.6
	Effective tax rate	(4.8	)%	(70.4	)%

Liability_for_Unpaid_Losses_an

Liability for Unpaid Losses and Loss Adjustment Expenses	9 Months Ended
	Sep. 30, 2013
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.
		Nine Months Ended
		September 30,
		2013		2012
		(in thousands)
	Unpaid losses and LAE, gross of reinsurance, at beginning of period	$	2,231,540	$	2,272,363
	Less reinsurance recoverables for unpaid losses and LAE	805,386		940,840
	Net unpaid losses and LAE at beginning of period	1,426,154		1,331,523
	Losses and LAE, net of reinsurance, related to:
	Current period	347,568		277,821
	Prior periods	1,797		1,281
	Total net losses and LAE incurred during the period	349,365		279,102
	Deduct payments for losses and LAE, net of reinsurance, related to:
	Current period	46,347		40,991
	Prior periods	203,707		178,087
	Total net payments for losses and LAE during the period	250,054		219,078
	Ending unpaid losses and LAE, net of reinsurance	1,525,465		1,391,547
	Reinsurance recoverable for unpaid losses and LAE	779,842		912,877
	Unpaid losses and LAE, gross of reinsurance, at end of period	$	2,305,307	$	2,304,424
	Total net losses and LAE included in the above table excludes the impact of the amortization of the deferred reinsurance gain—LPT Agreement (Note 8).
	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	9 Months Ended
	Sep. 30, 2013
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 $22.7 million and $14.0 million of the Deferred Gain for the nine months ended September 30, 2013 and 2012, respectively. Additionally, the Deferred Gain was reduced by $10.1 million in September 2013 due to the favorable LPT Reserve Adjustment (Note 2). The remaining Deferred Gain was $260.6 million and $281.0 million as of September 30, 2013 and December 31, 2012, respectively. The estimated remaining liabilities subject to the LPT Agreement were $633.0 million and $672.3 million as of September 30, 2013 and December 31, 2012, respectively. Losses and LAE paid with respect to the LPT Agreement totaled $630.0 million and $605.1 million through September 30, 2013 and December 31, 2012, respectively.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2013
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:
		September 30, 2013			December 31, 2012
		(in thousands)
	Net unrealized gain on investments, before taxes	$	140,328		$	199,305
	Deferred tax expense on net unrealized gains	(49,114		)	(69,756		)
	Total accumulated other comprehensive income, net	$	91,214		$	129,549

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2013
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 and Directors 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-13
	Stock options(1)	162,800	$	7.04	$	22.24	$	1.1
	RSUs(1)	73,894	22.24		—		1.6
	PSUs(2)	147,440	22.24		—		3.3
	May-13
	RSUs(1)	14,550	24.74		—		0.4
	Sep-13
	RSUs(1)	2,704	29.58		—		0.1
	-1	The stock options and RSUs awarded in March 2013 were awarded to certain officers of the Company and vest 25% on March 19, 2014, 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.
	The RSUs awarded in May and September 2013 were granted to non-employee Directors of the Company and vest on May, 23, 2014.
	-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 values shown in the table represent the target number of PSUs awarded.
	A total of 344,105 and 101,261 stock options were exercised during the nine months ended September 30, 2013 and the year ended December 31, 2012, respectively.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
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 shares outstanding used in the earnings per common share calculations.
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013		2012
		(in thousands, except share data)
	Net income available to stockholders—basic and diluted	$	27,585		$	7,766		$	49,663	$	19,122
	Weighted average number of shares outstanding—basic	31,214,230			30,891,648			31,070,571		31,689,844
	Effect of dilutive securities:
	PSUs	284,217			23,842			211,347		6,329
	Stock options	457,909			109,152			382,871		93,975
	RSUs	77,320			52,736			136,581		128,472
	Dilutive potential shares	819,446			185,730			730,799		228,776
	Weighted average number of shares outstanding—diluted	32,033,676			31,077,378			31,801,370		31,918,620
	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					Nine Months Ended
		September 30,					September 30,
		2013		2012			2013		2012
	Options excluded as the exercise price was greater than the average market price	—		934,597			—		934,597
	Options and RSUs excluded under the treasury method as the potential proceeds on settlement or exercise price was greater than the value of shares acquired	165,504		242,300			165,504		556,212

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
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:
		September 30, 2013				December 31, 2012
		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
		(in thousands)
	Financial assets
	Investments	$	2,248,952	$	2,248,952	$	2,149,514	$	2,149,514
	Cash and cash equivalents	99,823		99,823		140,661		140,661
	Restricted cash and cash equivalents	6,078		6,078		5,353		5,353
	Financial liabilities
	Notes payable	112,000		114,501		112,000		118,207
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 fair value measurements.
		September 30, 2013						December 31, 2012
		Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
		(in thousands)
	Fixed maturity securities
	U.S. Treasuries	$	—	$	159,293	$	—	$	—	$	152,490	$	—
	U.S. Agencies	—		74,623		—		—		93,967		—
	States and municipalities	—		761,801		—		—		758,516		—
	Corporate securities	—		754,226		—		—		676,243		—
	Residential mortgage-backed securities	—		258,851		—		—		252,852		—
	Commercial mortgage-backed securities	—		51,269		—		—		56,120		—
	Asset-backed securities	—		41,294		—		—		34,240		—
	Total fixed maturity securities	—		2,101,357		—		—		2,024,428		—
	Equity securities	$	147,595	$	—	$	—	$	125,086	$	—	$	—

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013
	Fixed maturity securities
	U.S. Treasuries	$	150,708		$	8,598		$	(13	)		$	159,293
	U.S. Agencies	71,058			3,565			—				74,623
	States and municipalities	721,713			43,616			(3,528		)		761,801
	Corporate securities	732,309			30,528			(8,611		)		754,226
	Residential mortgage-backed securities	252,022			9,574			(2,745		)		258,851
	Commercial mortgage-backed securities	53,044			361			(2,136		)		51,269
	Asset-backed securities	41,386			76			(168		)		41,294
	Total fixed maturity securities	2,022,240			96,318			(17,201		)		2,101,357
	Equity securities	86,384			61,617			(406		)		147,595
	Total investments	$	2,108,624		$	157,935		$	(17,607	)		$	2,248,952
	At December 31, 2012
	Fixed maturity securities
	U.S. Treasuries	$	138,839		$	13,651		$	—			$	152,490
	U.S. Agencies	88,202			5,765			—				93,967
	States and municipalities	689,776			68,740			—				758,516
	Corporate securities	627,047			49,461			(265		)		676,243
	Residential mortgage-backed securities	236,461			16,488			(97		)		252,852
	Commercial mortgage-backed securities	54,755			1,410			(45		)		56,120
	Asset-backed securities	34,062			211			(33		)		34,240
	Total fixed maturity securities	1,869,142			155,726			(440		)		2,024,428
	Equity securities	81,067			45,399			(1,380		)		125,086
	Total investments	$	1,950,209		$	201,125		$	(1,820	)		$	2,149,514
Investments classified by contractual maturity date table	'
	The amortized cost and estimated fair value of fixed maturity securities at September 30, 2013, 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	$	141,285		$	143,450
	Due after one year through five years	786,373			822,971
	Due after five years through ten years	571,472			598,132
	Due after ten years	176,658			185,390
	Mortgage and asset-backed securities	346,452			351,414
	Total	$	2,022,240		$	2,101,357
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 September 30, 2013 and December 31, 2012.
		September 30, 2013									December 31, 2012
		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	$	4,440		$	(13	)	2			$	—			$	—		—
	States and municipalities	101,983			(3,528		)	27			—				—			—
	Corporate securities	257,784			(8,453		)	94			36,338				(265		)	12
	Residential mortgage-backed securities	78,234			(2,739		)	36			14,629				(28		)	6
	Commercial mortgage-backed securities	33,681			(2,136		)	10			10,432				(45		)	4
	Asset-backed securities	30,490			(168		)	14			16,714				(33		)	5
	Total fixed maturity securities	506,612			(17,037		)	183			78,113				(371		)	27
	Equity securities	7,852			(329		)	24			11,645				(1,207		)	35
	Total less than 12 months	$	514,464		$	(17,366	)	207			$	89,758			$	(1,578	)	62
	12 months or greater:
	Fixed maturity securities
	Corporate securities	$	2,426		$	(158	)	1			$	—			$	—		—
	Residential mortgage-backed securities	498			(6		)	16			2,341				(69		)	17
	Total fixed maturity securities	2,924			(164		)	17			2,341				(69		)	17
	Equity securities	617			(77		)	1			456				(173		)	4
	Total 12 months or greater	$	3,541		$	(241	)	18			$	2,797			$	(242	)	21
	Total available-for-sale:
	Fixed maturity securities
	U.S. Treasuries	$	4,440		$	(13	)	2			$	—			$	—		—
	States and municipalities	101,983			(3,528		)	27			—				—			—
	Corporate securities	260,210			(8,611		)	95			36,338				(265		)	12
	Residential mortgage-backed securities	78,732			(2,745		)	52			16,970				(97		)	23
	Commercial mortgage-backed securities	33,681			(2,136		)	10			10,432				(45		)	4
	Asset-backed securities	30,490			(168		)	14			16,714				(33		)	5
	Total fixed maturity securities	509,536			(17,201		)	200			80,454				(440		)	44
	Equity securities	8,469			(406		)	25			12,101				(1,380		)	39
	Total available-for-sale	$	518,005		$	(17,607	)	225			$	92,555			$	(1,820	)	83
Net realized gains and change in unrealized gains (losses), available for sale securities table	'
	Realized gains on investments, net, 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						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013				2012
		(in thousands)
	Realized gains on investments, net
	Fixed maturity securities
	Gross gains	$	215		$	1,138		$	216			$	3,433
	Gross losses	(7		)	—			(7		)		(5		)
	Realized gains on fixed maturity securities, net	$	208		$	1,138		$	209			$	3,428
	Equity securities
	Gross gains	$	868		$	731		$	5,845			$	1,891
	Gross losses	(1		)	(31		)	(319		)		(758		)
	Realized gains on equity securities, net	$	867		$	700		$	5,526			$	1,133
	Total	$	1,075		$	1,838		$	5,735			$	4,561
	Change in unrealized gains (losses)
	Fixed maturity securities	$	(1,086	)	$	17,600		$	(76,168	)		$	21,158
	Equity securities	6,401			5,246			17,191				14,177
	Total	$	5,315		$	22,846		$	(58,977	)		$	35,335
Investment income table	'
	Net investment income was as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013				2012
		(in thousands)
	Fixed maturity securities	$	17,465		$	17,161		$	51,991			$	53,261
	Equity securities	950			856			2,733				2,280
	Cash equivalents and restricted cash	19			134			82				546
		18,434			18,151			54,806				56,087
	Investment expenses	(635		)	(645		)	(1,957		)		(1,899		)
	Net investment income	$	17,799		$	17,506		$	52,849			$	54,188

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2013
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.
		Nine Months Ended
		September 30,
		2013		2012
	Expense computed at statutory rate	35	%	35	%
	Dividends received deduction and tax-exempt interest	(15.0	)	(65.3	)
	LPT deferred gain amortization	(9.3	)	(44.7	)
	LPT Reserve Adjustment	(6.0	)	—
	Pre-privatization reserve adjustment, excluding LPT	(10.5	)	—
	Other	1		4.6
	Effective tax rate	(4.8	)%	(70.4	)%

Liability_for_Unpaid_Losses_an1

Liability for Unpaid Losses and Loss Adjustment Expenses (Tables)	9 Months Ended
	Sep. 30, 2013
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.
		Nine Months Ended
		September 30,
		2013		2012
		(in thousands)
	Unpaid losses and LAE, gross of reinsurance, at beginning of period	$	2,231,540	$	2,272,363
	Less reinsurance recoverables for unpaid losses and LAE	805,386		940,840
	Net unpaid losses and LAE at beginning of period	1,426,154		1,331,523
	Losses and LAE, net of reinsurance, related to:
	Current period	347,568		277,821
	Prior periods	1,797		1,281
	Total net losses and LAE incurred during the period	349,365		279,102
	Deduct payments for losses and LAE, net of reinsurance, related to:
	Current period	46,347		40,991
	Prior periods	203,707		178,087
	Total net payments for losses and LAE during the period	250,054		219,078
	Ending unpaid losses and LAE, net of reinsurance	1,525,465		1,391,547
	Reinsurance recoverable for unpaid losses and LAE	779,842		912,877
	Unpaid losses and LAE, gross of reinsurance, at end of period	$	2,305,307	$	2,304,424

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2013
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:
		September 30, 2013			December 31, 2012
		(in thousands)
	Net unrealized gain on investments, before taxes	$	140,328		$	199,305
	Deferred tax expense on net unrealized gains	(49,114		)	(69,756		)
	Total accumulated other comprehensive income, net	$	91,214		$	129,549

StockBased_Compensation_StockB

Stock-Based Compensation Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
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 and Directors 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-13
	Stock options(1)	162,800	$	7.04	$	22.24	$	1.1
	RSUs(1)	73,894	22.24		—		1.6
	PSUs(2)	147,440	22.24		—		3.3
	May-13
	RSUs(1)	14,550	24.74		—		0.4
	Sep-13
	RSUs(1)	2,704	29.58		—		0.1
	-1	The stock options and RSUs awarded in March 2013 were awarded to certain officers of the Company and vest 25% on March 19, 2014, 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.
	The RSUs awarded in May and September 2013 were granted to non-employee Directors of the Company and vest on May, 23, 2014.
	-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 values shown in the table represent the target number of PSUs awarded.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
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 shares outstanding used in the earnings per common share calculations.
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013		2012
		(in thousands, except share data)
	Net income available to stockholders—basic and diluted	$	27,585		$	7,766		$	49,663	$	19,122
	Weighted average number of shares outstanding—basic	31,214,230			30,891,648			31,070,571		31,689,844
	Effect of dilutive securities:
	PSUs	284,217			23,842			211,347		6,329
	Stock options	457,909			109,152			382,871		93,975
	RSUs	77,320			52,736			136,581		128,472
	Dilutive potential shares	819,446			185,730			730,799		228,776
	Weighted average number of shares outstanding—diluted	32,033,676			31,077,378			31,801,370		31,918,620
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					Nine Months Ended
		September 30,					September 30,
		2013		2012			2013		2012
	Options excluded as the exercise price was greater than the average market price	—		934,597			—		934,597
	Options and RSUs excluded under the treasury method as the potential proceeds on settlement or exercise price was greater than the value of shares acquired	165,504		242,300			165,504		556,212

Change_in_Estimate_DEI_Details

Change in Estimate DEI (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Change in Accounting Estimate [Line Items]	'	'	'	'
Amortization of deferred gain	'	'	$22,700	$14,000
Net income	27,585	7,766	49,663	19,122
Change Due to Estimated Reserves Ceded Under the LPT Agreement. [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Amortization of deferred gain	10,100	'	10,100	'
Net income	10,100	'	10,100	'
Basic and Diluted	$0.32	'	'	'
Due to Change in Reserves for Non-Taxable Periods [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Net income	$5,000	'	$5,000	'
Basic and Diluted	$0.16	'	$0.16	'

Change_in_Estimate_Details

Change in Estimate (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Change in Accounting Estimate [Line Items]	'	'	'	'	'
Unpaid losses and loss adjustment expenses	$2,305,307	'	$2,305,307	'	$2,231,540
Amortization of deferred gain	'	'	22,700	14,000	'
Net income	27,585	7,766	49,663	19,122	'
Basic	$0.88	$0.25	$1.60	$0.60	'
Diluted	$0.86	$0.25	$1.56	$0.60	'
Pre-privatization reserve adjustment, excluding LPT	'	'	-10.50%	0.00%	'
Change Due to Estimated Reserves Ceded Under the LPT Agreement. [Member]	'	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'	'
Unpaid losses and loss adjustment expenses	14,500	'	14,500	'	'
Amortization of deferred gain	10,100	'	10,100	'	'
Net income	10,100	'	10,100	'	'
Basic and Diluted	$0.32	'	'	'	'
Basic	'	'	$0.33	'	'
Diluted	'	'	$0.32	'	'
Due to Change in Reserves for Non-Taxable Periods [Member]	'	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'	'
Unpaid losses and loss adjustment expenses	24,300	'	24,300	'	'
Net income	$5,000	'	$5,000	'	'
Basic and Diluted	$0.16	'	$0.16	'	'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Investments	$2,248,952	$2,149,514	'	'
Investments, fair value	2,248,952	2,149,514	'	'
Cash and cash equivalents	99,823	140,661	243,242	252,300
Cash and cash equivalents, estimated fair value	99,823	140,661	'	'
Restricted cash and cash equivalents	6,078	5,353	'	'
Notes payable	112,000	112,000	'	'
Notes Payable, fair value	114,501	118,207	'	'
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Restricted cash and cash equivalents	$6,078	$5,353	'	'

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments, Fair Value Inputs (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	$2,248,952	$2,149,514
Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investments	2,101,357	2,024,428
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	2,101,357	2,024,428
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	159,293	152,490
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	'	152,490
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	74,623	93,967
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	'	93,967
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	761,801	758,516
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	'	758,516
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	754,226	676,243
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	'	676,243
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	258,851	252,852
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	'	252,852
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	51,269	56,120
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	'	56,120
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	41,294	34,240
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	'	34,240
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	147,595	125,086
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	'	125,086
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 $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	$2,108,624	$1,950,209
Gross unrealized gains	157,935	201,125
Gross unrealized losses	-17,607	-1,820
Investments	2,248,952	2,149,514
Deposit Assets	'	'
Investments	2,248,952	2,149,514
Assets Held-in-trust	'	'
Investments	2,248,952	2,149,514
Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	2,022,240	1,869,142
Gross unrealized gains	96,318	155,726
Gross unrealized losses	-17,201	-440
Investments	2,101,357	2,024,428
Deposit Assets	'	'
Investments	2,101,357	2,024,428
Assets Held-in-trust	'	'
Investments	2,101,357	2,024,428
US Treasury Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	150,708	138,839
Gross unrealized gains	8,598	13,651
Gross unrealized losses	-13	0
Investments	159,293	152,490
Deposit Assets	'	'
Investments	159,293	152,490
Assets Held-in-trust	'	'
Investments	159,293	152,490
US Government Agencies Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	71,058	88,202
Gross unrealized gains	3,565	5,765
Gross unrealized losses	0	0
Investments	74,623	93,967
Deposit Assets	'	'
Investments	74,623	93,967
Assets Held-in-trust	'	'
Investments	74,623	93,967
US States and Political Subdivisions Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	721,713	689,776
Gross unrealized gains	43,616	68,740
Gross unrealized losses	-3,528	0
Investments	761,801	758,516
Deposit Assets	'	'
Investments	761,801	758,516
Assets Held-in-trust	'	'
Investments	761,801	758,516
Corporate Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	732,309	627,047
Gross unrealized gains	30,528	49,461
Gross unrealized losses	-8,611	-265
Investments	754,226	676,243
Deposit Assets	'	'
Investments	754,226	676,243
Assets Held-in-trust	'	'
Investments	754,226	676,243
Residential Mortgage Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	252,022	236,461
Gross unrealized gains	9,574	16,488
Gross unrealized losses	-2,745	-97
Investments	258,851	252,852
Deposit Assets	'	'
Investments	258,851	252,852
Assets Held-in-trust	'	'
Investments	258,851	252,852
Commercial Mortgage Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	53,044	54,755
Gross unrealized gains	361	1,410
Gross unrealized losses	-2,136	-45
Investments	51,269	56,120
Deposit Assets	'	'
Investments	51,269	56,120
Assets Held-in-trust	'	'
Investments	51,269	56,120
Asset-backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	41,386	34,062
Gross unrealized gains	76	211
Gross unrealized losses	-168	-33
Investments	41,294	34,240
Deposit Assets	'	'
Investments	41,294	34,240
Assets Held-in-trust	'	'
Investments	41,294	34,240
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	86,384	81,067
Gross unrealized gains	61,617	45,399
Gross unrealized losses	-406	-1,380
Investments	147,595	125,086
Deposit Assets	'	'
Investments	147,595	125,086
Assets Held-in-trust	'	'
Investments	147,595	125,086
Portion at Fair Value Measurement [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments	32,100	35,000
Deposit Assets	'	'
Investments	32,100	35,000
Assets Held-in-trust	'	'
Investments	32,100	35,000
Portion at Fair Value Measurement [Member] | Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments	603,400	530,600
Deposit Assets	'	'
Investments	603,400	530,600
Assets Held-in-trust	'	'
Investments	603,400	530,600
Portion at Fair Value Measurement [Member] | Fixed Maturities and Restricted Cash Equivalents [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Investments	100,600	110,400
Deposit Assets	'	'
Investments	100,600	110,400
Assets Held-in-trust	'	'
Investments	$100,600	$110,400

Investments_Amortized_Cost_and

Investments, Amortized Cost and Estimated Fair Value (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amortized Cost	'	'
Due in one year or less, amortized cost	$141,285	'
Due after one year through five years, amortized cost	786,373	'
Due after five years through ten years, amortized cost	571,472	'
Due after ten years, amortized cost	176,658	'
Mortgage and asset-backed securities, amortized cost	346,452	'
Total, amortized cost	2,022,240	'
Estimated Fair Value	'	'
Due in one year or less, fair value	143,450	'
Due after one year through five years, fair value	822,971	'
Due after five years through ten years, fair value	598,132	'
Due after ten years, fair value	185,390	'
Mortgage and asset-backed securities, fair value	351,414	'
Total, fair value	$2,101,357	$2,024,428

Investments_Continuous_Loss_Po

Investments, Continuous Loss Position (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	$514,464,000	$89,758,000
Estimated fair value, 12 months or greater	3,541,000	2,797,000
Estimated fair value, total	518,005,000	92,555,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-17,366,000	-1,578,000
Gross unrealized losses, 12 months or greater	-241,000	-242,000
Estimated unrealized losses, total	-17,607,000	-1,820,000
Number of issues in loss position, less than 12 months	207	62
Number of Issues in loss position, 12 months or greater	18	21
Number of issues loss position, aggregate	225	83
Total impairments, value	100,000	'
Total impairments, number of securities	1	'
Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	506,612,000	78,113,000
Estimated fair value, 12 months or greater	2,924,000	2,341,000
Estimated fair value, total	509,536,000	80,454,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-17,037,000	-371,000
Gross unrealized losses, 12 months or greater	-164,000	-69,000
Estimated unrealized losses, total	-17,201,000	-440,000
Number of issues in loss position, less than 12 months	183	27
Number of Issues in loss position, 12 months or greater	17	17
Number of issues loss position, aggregate	200	44
US Treasury Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	4,440,000	0
Estimated fair value, total	4,440,000	0
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-13,000	0
Estimated unrealized losses, total	-13,000	0
Number of issues in loss position, less than 12 months	2	0
Number of issues loss position, aggregate	2	0
US States and Political Subdivisions Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	101,983,000	0
Estimated fair value, total	101,983,000	0
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-3,528,000	0
Estimated unrealized losses, total	-3,528,000	0
Number of issues in loss position, less than 12 months	27	0
Number of issues loss position, aggregate	27	0
Corporate Debt Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	257,784,000	36,338,000
Estimated fair value, 12 months or greater	2,426,000	0
Estimated fair value, total	260,210,000	36,338,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-8,453,000	-265,000
Gross unrealized losses, 12 months or greater	-158,000	0
Estimated unrealized losses, total	-8,611,000	-265,000
Number of issues in loss position, less than 12 months	94	12
Number of Issues in loss position, 12 months or greater	1	0
Number of issues loss position, aggregate	95	12
Residential Mortgage Backed Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	78,234,000	14,629,000
Estimated fair value, 12 months or greater	498,000	2,341,000
Estimated fair value, total	78,732,000	16,970,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-2,739,000	-28,000
Gross unrealized losses, 12 months or greater	-6,000	-69,000
Estimated unrealized losses, total	-2,745,000	-97,000
Number of issues in loss position, less than 12 months	36	6
Number of Issues in loss position, 12 months or greater	16	17
Number of issues loss position, aggregate	52	23
Commercial Mortgage Backed Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	33,681,000	10,432,000
Estimated fair value, total	33,681,000	10,432,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-2,136,000	-45,000
Estimated unrealized losses, total	-2,136,000	-45,000
Number of issues in loss position, less than 12 months	10	4
Number of issues loss position, aggregate	10	4
Asset-backed Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	30,490,000	16,714,000
Estimated fair value, total	30,490,000	16,714,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-168,000	-33,000
Estimated unrealized losses, total	-168,000	33,000
Number of issues in loss position, less than 12 months	0	0
Number of issues loss position, aggregate	0	0
Equity Securities [Member]	'	'
Estimated Fair Value	'	'
Estimated fair value, less than 12 months	7,852,000	11,645,000
Estimated fair value, 12 months or greater	617,000	456,000
Estimated fair value, total	8,469,000	12,101,000
Gross Unrealized Losses	'	'
Gross unrealized losses, less than 12 months	-329,000	-1,207,000
Gross unrealized losses, 12 months or greater	-77,000	-173,000
Estimated unrealized losses, total	-406,000	-1,380,000
Number of issues in loss position, less than 12 months	24	35
Number of Issues in loss position, 12 months or greater	1	4
Number of issues loss position, aggregate	$25	$39

Investments_Net_Realized_Gains

Investments, Net Realized Gains (Losses) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net realized gains (losses)	'	'	'	'
Net realized gains (losses) on fixed maturity and equity securities	$1,075	$1,838	$5,735	$4,561
Change in unrealized gains (losses)	'	'	'	'
Change in unrealized gains (losses) on fixed maturity and equity securities	5,315	22,846	-58,977	35,335
Debt Securities [Member]	'	'	'	'
Net realized gains (losses)	'	'	'	'
Gross gains from sales	215	1,138	216	3,433
Gross losses from sales	7	0	7	5
Net realized gains (losses) on fixed maturity and equity securities	208	1,138	209	3,428
Change in unrealized gains (losses)	'	'	'	'
Change in unrealized gains (losses) on fixed maturity and equity securities	-1,086	17,600	-76,168	21,158
Equity Securities [Member]	'	'	'	'
Net realized gains (losses)	'	'	'	'
Gross gains from sales	868	731	5,845	1,891
Gross losses from sales	1	31	319	758
Net realized gains (losses) on fixed maturity and equity securities	867	700	5,526	1,133
Change in unrealized gains (losses)	'	'	'	'
Change in unrealized gains (losses) on fixed maturity and equity securities	$6,401	$5,246	$17,191	$14,177

Net_Investment_Income_Details

Net Investment Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Investment Income, Reported Amounts, by Category [Line Items]	'	'	'	'
Investment income	$18,434	$18,151	$54,806	$56,087
Investment expenses	635	645	1,957	1,899
Net investment income	17,799	17,506	52,849	54,188
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	17,465	17,161	51,991	53,261
Equity Securities [Member]	'	'	'	'
Schedule of Investment Income, Reported Amounts, by Category [Line Items]	'	'	'	'
Investment income related to equity securities	950	856	2,733	2,280
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	$134	$82	$546

Income_Taxes_Details

Income Taxes (Details)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
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	-15.00%	-65.30%
LPT deferred gain amortization	-9.30%	-44.70%
LPT Reserve Adjustment	-6.00%	0.00%
Pre-privatization reserve adjustment, excluding LPT	-10.50%	0.00%
Other	1.00%	4.60%
Effective tax rate	-4.80%	-70.40%

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	$2,231,540	$2,272,363
Less reinsurance recoverables for upaid losses and LAE	805,386	940,840
Net unpaid losses and LAE at beginning of period	1,426,154	1,331,523
Losses and LAE, net of reinsurance, incurred in:	'	'
Current period	347,568	277,821
Prior periods	1,797	1,281
Total net losses and LAE incurred during the period	349,365	279,102
Deduct payments for losses and LAE, net of reinsurance, related to:	'	'
Current period	46,347	40,991
Prior periods	203,707	178,087
Total net payments for losses and LAE during the period	250,054	219,078
Ending unpaid losses and LAE, net of reinsurance	1,525,465	1,391,547
Reinsurance recoverables for unpaid losses and LAE	779,842	912,877
Unpaid losses and LAE, gross of reinsurance, at end of period	$2,305,307	$2,304,424

LPT_Agreement_LPT_Agreement_De

LPT Agreement LPT Agreement (Details) (USD $)	9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
				Change Due to Estimated Reserves Ceded Under the LPT Agreement. [Member]	Change Due to Estimated Reserves Ceded Under the LPT Agreement. [Member]	Indemnification Agreement [Member]
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	'	'	'	'	'
Coverage provided under LPT Agreement	'	'	'	'	'	2,000,000,000
Amortization of deferred gain	22,700,000	14,000,000	'	10,100,000	10,100,000	'
Deferred reinsurance gain—LPT Agreement	260,602,000	'	281,043,000	'	'	'
Estimated remaining liabilities - LPT Agreement	633,000,000	'	672,300,000	'	'	'
Paid losses and LAE claims related to LPT	$630,000,000	'	$605,100,000	'	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'
Net unrealized gain on investments, before taxes	$140,328	$199,305
Deferred tax expense on net unrealized gains	-49,114	-69,756
Total accumulated other comprehensive income, net	$91,214	$129,549

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)

9 Months Ended

12 Months Ended

9 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

31-May-13

Mar. 31, 2013

Mar. 31, 2013

Officer [Member]

Stock Option [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Performance Shares [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

Share-based compensation award, shares issued

'

'

'

162,800

[1]

2,704

[1]

14,550

[1]

73,894

[1]

147,440

[2]

Share-based compensation options, exercise price on grant date

'

'

'

$7.04

[1]

$29.58

[1]

$24.74

[1]

$22.24

[2]

$22.24

[2]

Share-based compensation award, fair value assumptions, exercise price

'

'

'

$22.24

[1]

$0

$0

$0

$0

Fair value of awards awarded on grant date

'

'

'

$1.10

[1]

$0.10

[1]

$0.40

[1]

$1.60

[1]

$3.30

[2]

Vesting rights for options awarded

'

'

'vest 25% on March 19, 2014, 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-options exercised

344,105

101,261

'

'

'

'

'

'

[1]

The stock options and RSUs awarded in March 2013 were awarded to certain officers of the Company and vest 25% on March 19, 2014, 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.The RSUs awarded in May and September 2013 were granted to non-employee Directors of the Company and vest on May, 23, 2014.

[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 values shown in the table represent the target number of PSUs awarded.

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Basic and Diluted, by Common Class [Line Items]	'	'	'	'
Net income available to stockholders - basic and diluted	$27,585	$7,766	$49,663	$19,122
Weighted average number of shares outstanding - basic	31,214,230	30,891,648	31,070,571	31,689,844
Effect of dilutive securities:	'	'	'	'
Dilutive securities	819,446	185,730	730,799	228,776
Weighted average number of shares outstanding - diluted	32,033,676	31,077,378	31,801,370	31,918,620
Antidilutive securities excluded from computation of earnings per share	0	934,597	0	934,597
Antidilutive securites excluded under the treasury method from computation of earnings per share	165,504	242,300	165,504	556,212
Employee Stock Option [Member]	'	'	'	'
Effect of dilutive securities:	'	'	'	'
Dilutive securities	457,909	109,152	382,871	93,975
Restricted Stock Units (RSUs) [Member]	'	'	'	'
Effect of dilutive securities:	'	'	'	'
Dilutive securities	77,320	52,736	136,581	128,472
Performance Shares [Member]	'	'	'	'
Effect of dilutive securities:	'	'	'	'
Dilutive securities	284,217	23,842	211,347	6,329