Infinity Property & Casualty (IPCC) 10-Q 7 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Registrant Name	INFINITY PROPERTY & CASUALTY CORP
Entity Central Index Key	1195933
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		11,466,399

Consolidated_Statements_Of_Ear

Consolidated Statements Of Earnings (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Earned premium	$332,106	$327,679
Percent change, Earned premium	1.40%
Installment and Other Fee Income	24,561	24,340
Increase Decrease Installment and Other Fee Income	0.90%
Net investment income	8,736	8,798
Percent change, Net investment Income	-0.70%
Net realized gains on investments	1,169	645
Percent change, Net realized gains on investments	81.40%
Other income	400	151
Percent change, Other income	164.90%
Total revenues	366,973	361,613
Percent change, Total revenues	1.50%
Costs and Expenses:
Losses and loss adjustment expenses	255,643	253,702
Percent change, Losses and loss adjustment expenses	0.80%
Commissions and other underwriting expenses	88,828	87,973
Percent change, Commissions and other underwriting expenses	1.00%
Interest expense	3,459	3,453
Percent change, Interest expense	0.20%
Corporate general and administrative expenses	1,903	1,526
Percent change, Corporate general and administrative expenses	24.70%
Other expenses	903	312
Percent change, Other expenses	189.50%
Total costs and expenses	350,737	346,966
Percent change, Total costs and expenses	1.10%
Earnings before income taxes	16,236	14,647
Percent change, Earnings before income taxes	10.90%
Provision for income taxes	5,082	4,320
Percent change, Provision for income taxes	17.70%
Net Earnings	11,154	10,327
Percent change, Net Earnings	8.00%
Net Earnings Per Common Share:
Basic (usd per share)	$0.98	$0.90
Percent change, Basic	8.90%
Diluted (usd per share)	$0.97	$0.89
Percent change, Diluted	9.00%
Average Number of Common Shares:
Basic (shares)	11,427	11,429
Percent change, Basic	0.00%
Diluted (shares)	11,551	11,580
Percent change, Diluted	-0.20%
Cash Dividends per Common Share	$0.43	$0.36
Percent change, Cash Dividends per Common Share	19.40%
Net realized gains before impairment losses	1,551	672
Percent change, Net realized gains before impairment losses	130.90%
Total other-than-temporary impairment (OTTI) losses	-381	-893
Increase Decrease in Impairment Losses Investment Available for Sale Securities	-57.30%
Non-credit portion in other comprehensive income	0	885
Increase Decrease in non-credit portion in other comprehensive income	-100.00%
OTTI losses reclassified from other comprehensive income	0	-19
Increase Decrease in Impairment Loss Reclassified from Other Comprehensive Income To Earnings	-100.00%
Net impairment losses recognized in earnings	-381	-27
Total net realized gains on investments	$1,169	$645
Percent change,Total net realized gains on investments	81.40%

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$11,154	$10,327
Other comprehensive income before tax:
Net change in postretirement benefit liability	16	657
Unrealized gains on investments:
Unrealized holding gains arising during the period	8,416	7,852
Less: Reclassification adjustments for gains included in net income	-1,169	-645
Unrealized gains on investments, net	7,247	7,208
Other comprehensive income, before tax	7,263	7,865
Effect on other comprehensive income	-2,542	-2,753
Other comprehensive income, net of tax	4,721	5,112
Comprehensive income	$15,875	$15,439

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments:
Fixed maturities – at fair value (amortized cost $1,407,631 and $1,412,417)	$1,433,022	$1,431,843
Equity securities – at fair value (cost $76,625 and $77,862)	94,453	94,408
Short-term investments - at fair value (amortized cost $1,820 and $803)	1,819	803
Total investments	1,529,294	1,527,054
Cash and cash equivalents	96,434	84,541
Accrued investment income	12,031	12,976
Agents’ balances and premium receivable, net of allowances for doubtful accounts of $14,648 and $15,510	529,969	483,638
Property and equipment, net of accumulated depreciation of $66,507 and $63,929	54,923	55,880
Prepaid reinsurance premium	5,386	4,809
Recoverables from reinsurers (includes $733 and $161 on paid losses and LAE)	14,715	14,530
Deferred policy acquisition costs	98,164	90,428
Current and deferred income taxes	13,148	20,022
Receivable for securities sold	3,650	4,549
Other assets	13,714	11,108
Goodwill	75,275	75,275
Total assets	2,446,702	2,384,812
Liabilities:
Unpaid losses and loss adjustment expenses	675,755	668,177
Unearned premium	644,433	589,260
Long-term debt (fair value $294,674 and $291,044)	275,000	275,000
Commissions payable	19,274	18,673
Payable for securities purchased	9,370	17,173
Other liabilities	115,542	118,870
Total liabilities	1,739,374	1,687,153
Commitments and contingencies
Shareholders' equity:
Common stock, no par value (50,000,000 shares authorized; 21,729,057 and 21,728,032 shares issued)	21,756	21,745
Additional paid-in capital	373,082	372,368
Retained earnings	731,873	725,651
Accumulated other comprehensive income, net of tax	28,216	23,494
Treasury stock, at cost (10,270,472 and 10,244,672 shares)	-447,598	-445,599
Total shareholders' equity	707,328	697,659
Total liabilities and shareholders' equity	$2,446,702	$2,384,812

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Fixed Maturities, Amortized Cost	$1,407,631	$1,412,417
Equity securities, cost	76,625	77,862
Short term investments, amortized cost	1,820	803
Agents' balances and premium receivable, allowance for doubtful accounts	14,648	15,510
Property and equipment, accumulated depreciation	66,507	63,929
Recoverable from reinsurers, paid losses and loss adjustment expenses	733	161
Long-term debt, fair value	$294,674	$291,044
Common stock, par value (usd per share)	$0	$0
Common stock, shares authorized (shares)	50,000,000	50,000,000
Common stock, shares issued (shares)	21,729,057	21,728,032
Treasury stock, shares (shares)	10,270,472	10,244,672

Consolidated_Statements_Of_Cha

Consolidated Statements Of Changes In Shareholders' Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income, Net of Tax	Treasury Stock
In Thousands, unless otherwise specified
Beginning Balance at Dec. 31, 2013	$656,758	$21,684	$368,902	$685,011	$16,624	($435,463)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	10,327			10,327
Net change in postretirement benefit liability	427				427
Change in unrealized gain on investments	5,055				5,055
Change in non-credit component of impairment losses on fixed maturities	-370				-370
Comprehensive income	15,439
Dividends paid to common shareholders	-4,139			-4,139
Shares issued and share-based compensation expense, including tax benefit	429	12	417
Acquisition of treasury stock	-2,000					-2,000
Ending Balance at Mar. 31, 2014	666,488	21,696	369,319	691,199	21,737	-437,463
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	46,874			46,874
Net change in postretirement benefit liability	-274				-274
Change in unrealized gain on investments	1,755				1,755
Change in non-credit component of impairment losses on fixed maturities	276				276
Comprehensive income	48,632
Dividends paid to common shareholders	-12,423			-12,423
Shares issued and share-based compensation expense, including tax benefit	3,098	49	3,049
Acquisition of treasury stock	-8,136					-8,136
Ending Balance at Dec. 31, 2014	697,659	21,745	372,368	725,651	23,494	-445,599
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	11,154			11,154
Net change in postretirement benefit liability	11				11
Change in unrealized gain on investments	4,497				4,497
Change in non-credit component of impairment losses on fixed maturities	213				213
Comprehensive income	15,875
Dividends paid to common shareholders	-4,932			-4,932
Shares issued and share-based compensation expense, including tax benefit	725	11	714
Acquisition of treasury stock	-1,999					-1,999
Ending Balance at Mar. 31, 2015	$707,328	$21,756	$373,082	$731,873	$28,216	($447,598)

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating Activities:
Net earnings	$11,154	$10,327
Adjustments:
Depreciation	2,982	2,540
Amortization	5,888	5,767
Net realized gains on investments	-1,169	-645
Loss (gain) on disposal of property and equipment	115	-27
Share-based compensation expense	659	-168
Excess tax benefits from share-based payment arrangements	0	-56
Activity related to rabbi trust	27	18
Change in accrued investment income	946	386
Change in agents’ balances and premium receivable	-46,331	-41,657
Change in reinsurance receivables	-761	-1,146
Change in deferred policy acquisition costs	-7,736	-6,449
Change in other assets	1,732	2,555
Change in unpaid losses and loss adjustment expenses	7,578	16,313
Change in unearned premium	55,173	47,008
Change in other liabilities	-2,790	5,553
Net cash provided by operating activities	27,467	40,318
Investing Activities:
Purchases of fixed maturities	-150,155	-183,528
Purchases of equity securities	-2,000	-2,600
Purchases of short-term investments	-1,032	-200
Purchases of property and equipment	-2,140	-5,249
Maturities and redemptions of fixed maturities	46,727	41,201
Maturities and redemptions of short-term investments	0	1,400
Proceeds from sale of fixed maturities	95,432	64,959
Proceeds from sale of equity securities	4,489	0
Proceeds from sale of property and equipment	0	30
Net cash used in investing activities	-8,678	-83,986
Financing Activities:
Proceeds from stock options exercised and employee stock purchases	66	541
Excess tax benefits from share-based payment arrangements	0	56
Principal payments under capital lease obligation	-118	-134
Acquisition of treasury stock	-1,912	-1,975
Dividends paid to shareholders	-4,932	-4,139
Net cash used in financing activities	-6,896	-5,650
Net increase (decrease) in cash and cash equivalents	11,893	-49,319
Cash and cash equivalents at beginning of period	84,541	134,211
Cash and cash equivalents at end of period	$96,434	$84,892

Reporting_And_Accounting_Polic

Reporting And Accounting Policies	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reporting And Accounting Policies	Reporting and Accounting Policies
	Nature of Operations
	We are a holding company that provides, through our subsidiaries, personal automobile insurance with a focus on the nonstandard market. Although licensed to write insurance in all 50 states and the District of Columbia, we focus on select states that we believe offer the greatest opportunity for premium growth and profitability.
	Basis of Consolidation and Reporting
	The accompanying consolidated financial statements are unaudited and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2014. This Quarterly Report on Form 10-Q, including the Condensed Notes to Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations, focuses on our financial performance since the beginning of the year.
	These financial statements reflect certain adjustments necessary for a fair presentation of our results of operations and financial position. Such adjustments consist of normal, recurring accruals recorded to match expenses with their related revenue streams and the elimination of all significant inter-company transactions and balances.
	We have evaluated events that occurred after March 31, 2015, for recognition or disclosure in our financial statements and the notes to the financial statements.
	Schedules may not foot due to rounding.
	Estimates
	We based certain accounts and balances within these financial statements upon our estimates and assumptions. The amount of reserves for claims not yet paid, for example, is an item that we can only record by estimation. Unrealized capital gains and losses on investments are subject to market fluctuations, and we use judgment in the determination of whether unrealized losses on certain securities are temporary or other-than-temporary. Should actual results differ significantly from these estimates, the effect on our results of operations could be material. The results of operations for the periods presented may not be indicative of our results for the entire year.
	Recently Issued Accounting Standards
	In April 2015 the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) related to the presentation of debt issuance costs. The guidance requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability. The standard is effective for fiscal years beginning after December 15, 2015 and is to be applied retrospectively.  The new guidance will have no impact on our results of operations or financial position.
	In May 2014 the FASB issued an ASU related to the accounting for revenue from contracts with customers. Insurance contracts have been excluded from the scope of the guidance, which is effective for fiscal years beginning after December 15, 2016. We do not expect the adoption of this standard to have a material impact on our financial condition or results of operations.

Computation_Of_Earnings_Per_Sh

Computation Of Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computation of Net Earnings per Share	Computation of Net Earnings per Share
	The following table illustrates our computations of basic and diluted net earnings per common share ($ in thousands, except per
	share figures):
		Three months ended March 31,
		2015		2014
	Net earnings	$	11,154	$	10,327
	Average basic shares outstanding	11,427		11,429
	Basic net earnings per share	$	0.98	$	0.9
	Average basic shares outstanding	11,427		11,429
	Restricted stock not yet vested	11		57
	Dilutive effect of assumed option exercises	0		2
	Dilutive effect of Performance Share Plan	113		92
	Average diluted shares outstanding	11,551		11,580
	Diluted net earnings per share	$	0.97	$	0.89

Fair_Value

Fair Value	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value	Fair Value
	Fair values of instruments are based on:
	(i)	quoted prices in active markets for identical assets (Level 1);
	(ii)	quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs are observable in active markets (Level 2); or
	(iii)	valuations derived from valuation techniques in which one or more significant inputs are unobservable in the marketplace (Level 3).
	The following tables present, for each of the fair value hierarchy levels, our assets and liabilities for which we report fair value on a recurring basis ($ in thousands):
			Fair Value
	March 31, 2015		Level 1				Level 2				Level 3				Total
	Cash and cash equivalents		$	96,434			$	0			$	0			$	96,434
	Fixed maturity securities:
	U.S. government		66,511				58				0				66,569
	State and municipal		0				504,690				10				504,700
	Mortgage-backed securities:
	Residential		0				345,884				0				345,884
	Commercial		0				66,992				0				66,992
	Total mortgage-backed securities		0				412,876				0				412,876
	Asset-backed securities		0				62,302				46				62,348
	Corporates		0				383,583				2,946				386,529
	Total fixed maturities		66,511				1,363,509				3,002				1,433,022
	Equity securities		94,453				0				0				94,453
	Short-term investments		0				1,819				0				1,819
	Total cash and investments		$	257,398			$	1,365,328			$	3,002			$	1,625,728
	Percentage of total cash and investments		15.8		%		84		%		0.2		%		100		%
			Fair Value
	December 31, 2014		Level 1				Level 2				Level 3				Total
	Cash and cash equivalents		$	84,541			$	0			$	0			$	84,541
	Fixed maturity securities:
	U.S. government		66,847				87				0				66,933
	State and municipal		0				503,650				0				503,650
	Mortgage-backed securities:
	Residential		0				354,528				0				354,528
	Commercial		0				50,838				0				50,838
	Total mortgage-backed securities		0				405,366				0				405,366
	Asset-backed securities		0				58,457				150				58,607
	Corporates		0				394,152				3,134				397,286
	Total fixed maturities		66,847				1,361,711				3,285				1,431,843
	Equity securities		94,408				0				0				94,408
	Short-term investments		0				803				0				803
	Total cash and investments		$	245,795			$	1,362,514			$	3,285			$	1,611,594
	Percentage of total cash and investments		15.3		%		84.5		%		0.2		%		100		%
	We do not report our long-term debt at fair value in the Consolidated Balance Sheets. The $294.7 million and $291.0 million fair value of our long-term debt at March 31, 2015, and December 31, 2014, respectively, would be included in Level 2 of the fair value hierarchy if it were reported at fair value.
	Level 1 includes cash and cash equivalents, U.S. Treasury securities, an exchange-traded fund and equities held in a rabbi trust which funds our Supplemental Employee Retirement Plan ("SERP"). Level 2 includes securities whose fair value was determined using observable market inputs. Level 3 securities are comprised of (i) securities for which there is no active or inactive market for similar instruments; (ii) securities whose fair value is determined based on unobservable inputs; and (iii) securities, other than those backed by the U.S. Government, that are not rated by a nationally recognized statistical rating organization ("NRSRO"). We recognize transfers between levels at the beginning of the reporting period.
	A third party nationally recognized pricing service provides the fair value of securities in Level 2. We review the third party pricing methodologies quarterly and test for significant differences between the market price used to value the security and recent sales activity.
	The following tables present the progression in the Level 3 fair value category ($ in thousands):
		Three months ended March 31, 2015
		State and				Corporates				Asset-Backed Securities				Total
		Municipal
	Balance at beginning of period	$	0			$	3,134			$	150			$	3,285
	Total gains or (losses), unrealized or realized
	Included in net earnings	(0		)		(95		)		0				(95		)
	Included in other comprehensive income	0				(14		)		0				(14		)
	Settlements	0				(80		)		(105		)		(184		)
	Transfers in	10				0				0				10
	Balance at end of period	$	10			$	2,946			$	46			$	3,002
		Three months ended March 31, 2014
		State and				Corporates				Asset-Backed Securities				Total
		Municipal
	Balance at beginning of period	$	0			$	5,175			$	686			$	5,860
	Total gains or (losses), unrealized or realized
	Included in net earnings	0				9				0				9
	Included in other comprehensive income	0				(56		)		0				(56		)
	Settlements	0				(74		)		(156		)		(230		)
	Transfers in	0				0				0				0
	Balance at end of period	$	0			$	5,054			$	530			$	5,583
Of the $3.0 million fair value of securities in Level 3 at March 31, 2015, which consists of eight securities, we priced five based on non-binding broker quotes, one price was provided by our unaffiliated money manager and two securities, which were included in Level 3 because they were not rated by a nationally recognized statistical rating organization, were priced by a nationally recognized pricing service.
During the three months ended March 31, 2015, one security was transferred from Level 2 into Level 3 because it was no longer rated by a nationally recognized statistical rating organization. There were no transfers of securities between Levels 1 and 2.
The gains or losses included in net earnings are included in the line item "Net realized gains on investments" in the Consolidated Statements of Earnings. We recognize the net gains or losses included in other comprehensive income in the line item "Unrealized gains on investments, net" in the Consolidated Statements of Comprehensive Income and the line item "Change in unrealized gain on investments" or the line item "Change in non-credit component of impairment losses on fixed maturities" in the Consolidated Statements of Changes in Shareholders’ Equity.
The following table presents the carrying value and estimated fair value of our financial instruments ($ in thousands):
	March 31, 2015								December 31, 2014
	Carrying				Fair				Carrying				Fair
	Value				Value				Value				Value
Assets:
Cash and cash equivalents	$	96,434			$	96,434			$	84,541			$	84,541
Investments
Fixed maturities	1,433,022				1,433,022				1,431,843				1,431,843
Equity securities	94,453				94,453				94,408				94,408
Short-term	1,819				1,819				803				803
Total cash and investments	$	1,625,728			$	1,625,728			$	1,611,594			$	1,611,594
Liabilities:
Long-term debt	$	275,000			$	294,674			$	275,000			$	291,044
Refer to Note 4 to the Consolidated Financial Statements for additional information on investments and Note 5 to the Consolidated Financial Statements for additional information on long-term debt.

Investments

Investments	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investments	Investments
	We consider all fixed maturity and equity securities to be available-for-sale and report them at fair value with the net unrealized gains or losses reported after-tax (net of any valuation allowance) as a component of other comprehensive income. The proceeds from sales of securities for the three months ended March 31, 2015, and March 31, 2014, were $99.9 million and $65.0 million, respectively. The proceeds for the three months ended March 31, 2015, were net of $3.6 million of receivable for securities sold during the first quarter of 2015 that had not settled at March 31, 2015. The proceeds for the three months ended March 31, 2014, were net of $0.2 million of receivable for securities sold during the first quarter of 2014 that had not settled at March 31, 2014.
	Gross gains of $2.1 million and gross losses of $0.6 million were realized on sales of available for sale securities during the three months ended March 31, 2015, compared with gross gains of $0.8 million and gross losses of $0.1 million realized on sales during the three months ended March 31, 2014. Gains or losses on securities are determined on a specific identification basis.
	Summarized information for the major categories of our investment portfolio follows ($ in thousands):
		March 31, 2015
		Amortized				Gross				Gross				Fair Value			OTTI
		Cost or Cost				Unrealized				Unrealized							Recognized in
						Gains				Losses							Accumulated
																	OCI(1)
	Fixed maturities:
	U.S. government	$	66,013			$	582			$	(26	)		$	66,569		$	0
	State and municipal	493,901				10,923				(124		)		504,700			(69		)
	Mortgage-backed securities:
	Residential	339,035				7,487				(638		)		345,884			(2,781		)
	Commercial	66,885				315				(208		)		66,992			0
	Total mortgage-backed securities	405,920				$	7,802			(846		)		$	412,876		(2,781		)
	Asset-backed securities	62,107				259				(19		)		62,348			(8		)
	Corporates	379,689				7,684				(843		)		386,529			(246		)
	Total fixed maturities	1,407,631				27,249				(1,858		)		1,433,022			(3,105		)
	Equity securities	76,625				17,828				0				94,453			0
	Short-term investments	1,820				0				(1		)		1,819			0
	Total	$	1,486,075			$	45,077			$	(1,859	)		$	1,529,294		$	(3,105	)
		December 31, 2014
		Amortized				Gross				Gross				Fair Value			OTTI
		Cost or Cost				Unrealized				Unrealized							Recognized in
						Gains				Losses							Accumulated
																	OCI(1)
	Fixed maturities:
	U.S. government	$	66,625			$	502			$	(193	)		$	66,933		$	0
	State and municipal	493,350				10,637				(337		)		503,650			(69		)
	Mortgage-backed securities:
	Residential	349,371				6,547				(1,390		)		354,528			(2,914		)
	Commercial	50,914				182				(258		)		50,838			0
	Total mortgage-backed securities	400,285				6,729				(1,648		)		405,366			(2,914		)
	Asset-backed securities	58,546				131				(70		)		58,607			(8		)
	Corporates	393,611				5,999				(2,324		)		397,286			(441		)
	Total fixed maturities	1,412,417				23,998				(4,572		)		1,431,843			(3,433		)
	Equity securities	77,862				16,546				0				94,408			0
	Short-term investments	803				0				(1		)		803			0
	Total	$	1,491,082			$	40,544			$	(4,573	)		$	1,527,054		$	(3,433	)
	(1) The total non-credit portion of OTTI recognized in Accumulated OCI reflecting the original non-credit loss at the time the credit impairment was determined.
	The following tables set forth the amount of unrealized loss by investment category and length of time that individual securities have been in a continuous unrealized loss position ($ in thousands):
		Less than 12 Months													12 Months or More
		Number of		Fair				Gross				Unrealized			Number of		Fair			Gross				Unrealized
		Securities		Value				Unrealized				Losses as			Securities		Value			Unrealized				Losses as
		with						Losses				% of Cost			with					Losses				% of Cost
		Unrealized													Unrealized
		Losses													Losses
	31-Mar-15
	Fixed maturities:
	U.S. government	3		$	10,945			$	(9	)		0.1	%		4		$	5,172		$	(17	)		0.3	%
	State and municipal	22		49,505				(124		)		0.2	%		0		0			0				0	%
	Mortgage-backed securities:
	Residential	34		24,701				(94		)		0.4	%		70		52,776			(544		)		1	%
	Commercial	8		24,585				(135		)		0.5	%		5		21,091			(73		)		0.3	%
	Total mortgage-backed securities	42		49,286				(230		)		0.5	%		75		73,867			(616		)		0.8	%
	Asset-backed securities	11		8,417				(9		)		0.1	%		2		1,150			(10		)		0.8	%
	Corporates	39		49,860				(739		)		1.5	%		7		9,711			(104		)		1.1	%
	Total fixed maturities	117		168,014				(1,110		)		0.7	%		88		89,900			(747		)		0.8	%
	Equity securities	0		0				0				0	%		0		0			0				0	%
	Short-term investments	2		1,531				(1		)		0.1	%		0		0			0				0	%
	Total	119		$	169,545			$	(1,111	)		0.7	%		88		$	89,900		$	(747	)		0.8	%
		Less than 12 Months														12 Months or More
		Number of			Fair				Gross				Unrealized			Number of		Fair			Gross				Unrealized
Securities		Value			Unrealized				Losses as		Securities		Value			Unrealized			Losses as
with					Losses				% of Cost		with					Losses			% of Cost
Unrealized											Unrealized
Losses											Losses
December 31, 2014
Fixed maturities:
U.S. government	2			$	5,275			$	(13	)		0.3	%		8		$	21,051		$	(180	)		0.8	%
State and municipal	45			108,721				(290		)		0.3	%		2		4,183			(47		)		1.1	%
Mortgage-backed securities:
Residential	24			12,855				(34		)		0.3	%		109		100,752			(1,356		)		1.3	%
Commercial	8			15,638				(122		)		0.8	%		5		9,519			(136		)		1.4	%
Total mortgage-backed securities	32			28,493				(156		)		0.5	%		114		110,271			(1,492		)		1.3	%
Asset-backed securities	24			23,351				(60		)		0.3	%		2		1,150			(9		)		0.8	%
Corporates	103			142,046				(1,820		)		1.3	%		16		19,865			(503		)		2.5	%
Total fixed maturities	206			307,886				(2,340		)		0.8	%		142		156,521			(2,232		)		1.4	%
Equity securities	0			0				0				0	%		0		0			0				0	%
Short-term investments	2			803				(1		)		0.1	%		0		0			0				0	%
Total	208			$	308,689			$	(2,341	)		0.8	%		142		$	156,521		$	(2,232	)		1.4	%
The determination of whether unrealized losses are “other-than-temporary” requires judgment based on subjective as well as objective factors. Factors we considered and resources we used in our determination include:
•	whether the unrealized loss is credit-driven or a result of changes in market interest rates;
•	the length of time the security’s market value has been below its cost;
•	the extent to which fair value is less than cost basis;
•	the intent to sell the security;
•	whether it is more likely than not that there will be a requirement to sell the security before its anticipated recovery;
•	historical operating, balance sheet and cash flow data contained in issuer SEC filings;
•	issuer news releases;
•	near-term prospects for improvement in the issuer and/or its industry;
•	industry research and communications with industry specialists; and
•	third-party research and credit rating reports.
We regularly evaluate for potential impairment each security position that has either of the following: a fair value of less than 95% of its book value or an unrealized loss that equals or exceeds $100,000.
The following table summarizes those securities, excluding the rabbi trust, with unrealized gains or losses:
	March 31,			December 31,
	2015			2014
Number of positions held with unrealized:
Gains	930			778
Losses	207			350
Number of positions held that individually exceed unrealized:
Gains of $500,000	3			3
Losses of $500,000	0			0
Percentage of positions held with unrealized:
Gains that were investment grade	92	%		92	%
Losses that were investment grade	85	%		84	%
Percentage of fair value held with unrealized:
Gains that were investment grade	92	%		94	%
Losses that were investment grade	86	%		86	%
The following table sets forth the amount of unrealized loss, excluding the rabbi trust, by age and severity at March 31, 2015 ($ in thousands):
Age of Unrealized Losses:	Fair Value of				Total Gross				Less Than 5%*				5% - 10%*			Greater
	Securities with				Unrealized											Than 10%*
	Unrealized				Losses
	Losses
Three months or less	$	121,145			$	(469	)		$	(396	)		$	(73	)	$	0
Four months through six months	30,368				(351		)		(270		)		(37		)	(45		)
Seven months through nine months	17,986				(291		)		(291		)		0			0
Ten months through twelve months	4,828				(16		)		(16		)		0			0
Greater than twelve months	85,117				(731		)		(731		)		0			0
Total	$	259,444			$	(1,859	)		$	(1,704	)		$	(110	)	$	(45	)
* As a percentage of amortized cost or cost.
The change in unrealized gains (losses) on marketable securities included the following ($ in thousands):
	Pre-tax
	Fixed				Equity				Short-Term Investments				Tax			Net
	Maturities				Securities								Effects
Three months ended March 31, 2015
Unrealized holding gains (losses) on securities arising during the period	$	6,036			$	2,380			$	(0	)		$	(2,946	)	$	5,470
Realized gains on securities sold	(452		)		(1,098		)		0				543			(1,008		)
Impairment loss recognized in earnings	381				0				0				(134		)	248
Change in unrealized gains (losses) on marketable securities, net	$	5,966			$	1,282			$	(0	)		$	(2,536	)	$	4,711
Three months ended March 31, 2014
Unrealized holding gains on securities arising during the period	$	7,389			$	458			$	5			$	(2,748	)	$	5,104
Realized gains on securities sold	(666		)		0				(5		)		235			(437		)
Impairment loss recognized in earnings	27				0				0				(9		)	17
Change in unrealized gains (losses) on marketable securities, net	$	6,750			$	458			$	(1	)		$	(2,523	)	$	4,685
For fixed maturity securities that are other-than-temporarily impaired, we assess our intent to sell and the likelihood that we will be required to sell the security before recovery of our amortized cost. If a fixed maturity security is considered other-than-temporarily impaired but we do not intend to and are not more than likely to be required to sell the security before our recovery of amortized cost, we separate the amount of the impairment into a credit loss component and the amount due to all other factors ("non-credit component"). The excess of the amortized cost over the present value of the expected cash flows determines the credit loss component of an impairment charge on a fixed maturity security. The present value is determined using the best estimate of cash flows discounted at (1) the effective interest rate implicit at the date of acquisition for non-structured securities or (2) the book yield for structured securities. The techniques and assumptions for determining the best estimate of cash flows vary depending on the type of security. We recognize the credit loss component of an impairment charge in net earnings and the non-credit component in accumulated other comprehensive income. If we intend to sell or will, more likely than not, be required to sell a security, we treat the entire amount of the impairment as a credit loss.
The following table is a progression of credit losses on fixed maturity securities that were bifurcated between a credit and non-credit component ($ in thousands):
	Three months ended March 31,
	2015				2014
Beginning balance	$	852			$	956
Additions for:
Previously impaired securities	0				19
Newly impaired securities	0				8
Reductions for:
Securities sold and paid down	(52		)		(40		)
Ending balance	$	799			$	943
The table below sets forth the scheduled maturities of fixed maturity securities at March 31, 2015, based on their fair values ($ in thousands). We report securities that do not have a single maturity date at average maturity. Actual maturities may differ from contractual maturities because certain securities may be called or prepaid by the issuers.
	Fair Value															Amortized
																Cost
Maturity	Securities				Securities				Securities				All Fixed			All Fixed
	with				with				with No				Maturity			Maturity
	Unrealized				Unrealized				Unrealized				Securities			Securities
	Gains				Losses				Gains or
									Losses
One year or less	$	93,229			$	12,491			$	3,206			$	108,925		$	108,112
After one year through five years	504,782				57,388				0				562,170			551,461
After five years through ten years	219,377				55,314				467				275,158			269,159
After ten years	11,545				0				0				11,545			10,871
Mortgage- and asset-backed securities	342,503				132,720				0				475,224			468,027
Total	$	1,171,436			$	257,913			$	3,673			$	1,433,022		$	1,407,631

LongTerm_Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt
	In September 2012 we issued $275 million principal of senior notes due September 2022 (the “5.0% Senior Notes”). The 5.0% Senior Notes accrue interest at 5.0%, payable semiannually. At the time we issued the 5.0% Senior Notes, we capitalized $2.2 million of debt issuance costs, which we are amortizing over the term of the 5.0% Senior Notes. We calculated the March 31, 2015, fair value of $294.7 million using a 196 basis point spread to the ten-year U.S. Treasury Note of 1.925%.
	In August 2014 we renewed our agreement for a $50 million three-year revolving credit facility (the “Credit Agreement”) that requires us to meet certain financial and other covenants. We are currently in compliance with all covenants under the Credit
	Agreement. At March 31, 2015, there were no borrowings outstanding under the Credit Agreement.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The following is a reconciliation of income taxes at the statutory rate of 35.0% to the effective provision for income taxes as shown in the Consolidated Statements of Earnings ($ in thousands):
		Three months ended March 31,
		2015			2014
	Earnings before income taxes	$	16,236		$	14,647
	Income taxes at statutory rate	5,683			5,126
	Effect of:
	Dividends-received deduction	(104		)	(107		)
	Tax-exempt interest	(724		)	(702		)
	Other	228			3
	Provision for income taxes as shown on the Consolidated Statements of Earnings	$	5,082		$	4,320
	GAAP effective tax rate	31.3		%	29.5		%

Additional_Information

Additional Information	3 Months Ended
	Mar. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Additional Information	Additional Information
	Supplemental Cash Flow Information
	We made the following payments that we do not separately disclose in the Consolidated Statements of Cash Flows ($ in thousands):
		Three months ended March 31,
		2015		2014
	Income tax payments	$	750	$	0
	Interest payments on debt	6,875		6,875
	Interest payments on capital leases	22		16
	Negative Cash Book Balances
	Negative cash book balances, included in the line item “Other liabilities” in the Consolidated Balance Sheets, were $54.5 million and $51.2 million, respectively, at March 31, 2015, and December 31, 2014.

Insurance_Reserves

Insurance Reserves	3 Months Ended
	Mar. 31, 2015
Insurance [Abstract]
Insurance Reserves	Insurance Reserves
	Insurance reserves include liabilities for unpaid losses, both known and estimated for incurred but not reported (“IBNR”), and unpaid loss adjustment expenses (“LAE”). The following table provides an analysis of changes in the liability for unpaid losses and LAE on a GAAP basis ($ in thousands):
		Three months ended March 31,
		2015			2014
	Balance at Beginning of Period
	Unpaid losses on known claims	$	235,037		$	221,447
	IBNR losses	277,482			262,660
	LAE	155,658			162,469
	Total unpaid losses and LAE	668,177			646,577
	Reinsurance recoverables	(14,370		)	(14,431		)
	Unpaid losses and LAE, net of reinsurance recoverables	653,808			632,146
	Current Activity
	Loss and LAE incurred:
	Current accident year	257,785			256,776
	Prior accident years	(2,142		)	(3,074		)
	Total loss and LAE incurred	255,643			253,702
	Loss and LAE payments:
	Current accident year	(81,907		)	(80,818		)
	Prior accident years	(165,770		)	(156,683		)
	Total loss and LAE payments	(247,677		)	(237,502		)
	Balance at End of Period
	Unpaid losses and LAE, net of reinsurance recoverables	661,773			648,346
	Add back reinsurance recoverables	13,982			14,544
	Total unpaid losses and LAE	675,755			662,890
	Unpaid losses on known claims	241,483			226,659
	IBNR losses	278,863			272,159
	LAE	155,409			164,072
	Total unpaid losses and LAE	$	675,755		$	662,890
	The $2.1 million of favorable reserve development during the three months ended March 31, 2015, was primarily due to decreases in loss adjustment expense in Florida bodily injury coverages and in California property damage and bodily injury coverages related to accident year 2013.
	The $3.1 million of favorable reserve development during the three months ended March 31, 2014, was primarily due to a decrease in frequency in accident year 2013 in Florida personal injury protection and material damage coverages in the states of California, Georgia and Pennsylvania.

Commitments_And_Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Commitments
	There have been no material changes from the commitments discussed in the Form 10-K for the year ended December 31, 2014. For a description of our previously reported commitments, refer to Note 14 Commitments and Contingencies in the Form 10-K for the year ended December 31, 2014.
	Contingencies
	From time to time we and our subsidiaries are named as defendants in various lawsuits incidental to our insurance operations. We consider legal actions relating to claims made in the ordinary course of seeking indemnification for a loss covered by the insurance policy in establishing loss and LAE reserves.
	We also face, in the ordinary course of business, lawsuits that seek damages beyond policy limits, commonly known as extra-contractual claims, as well as class action and individual lawsuits that involve issues not unlike those facing other insurance companies and employers. We continually evaluate potential liabilities and reserves for litigation of these types using the criteria established by the Contingencies topic of the FASB. Under this guidance we may only record reserves for a loss if the likelihood of occurrence is probable and we can reasonably estimate the amount. If a material loss is judged to be reasonably possible, we will disclose an estimated range of loss or state that an estimate cannot be made. We consider each legal action using this guidance and record reserves for losses as warranted by establishing a reserve captured within our Consolidated Balance Sheets line-items “Unpaid losses and LAE” for extra-contractual claims and “Other liabilities” for class action and other non-claims related lawsuits. We record amounts incurred on the Consolidated Statements of Earnings within “Losses and LAE” for extra-contractual claims and “Other expenses” for class action and other non-claims related lawsuits.
	Certain claims and legal actions have been brought against us for which we have accrued no loss, and for which an estimate of a possible range of loss cannot be made under the above rules. While it is not possible to predict the ultimate outcome of these claims or lawsuits, we do not believe they are likely to have a material effect on our financial condition or liquidity. However, losses incurred because of these cases could have a material adverse impact on net earnings in a given period.
	For a description of previously reported contingencies, refer to Note 14 Commitments and Contingencies in the Form 10-K for the year ended December 31, 2014.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income
	The components of other comprehensive income before and after tax are as follows ($ in thousands):
		Three months ended March 31,
		2015									2014
		Before Tax			Income Tax			Net			Before Tax			Income Tax			Net
	Accumulated change in postretirement benefit liability, beginning of period	$	174		$	(61	)	$	113		$	(62	)	$	22		$	(40	)
	Effect on other comprehensive income	16			(6		)	11			657			(230		)	427
	Accumulated change in postretirement benefit liability, end of period	190			(66		)	123			595			(208		)	387
	Accumulated unrealized gains on investments, net, beginning of period	35,972			(12,590		)	23,382			25,638			(8,973		)	16,665
	Other comprehensive income before reclassification	8,416			(2,946		)	5,470			7,852			(2,748		)	5,104
	Reclassification adjustment for other-than-temporary impairments included in net income	381			(134		)	248			27			(9		)	17
	Reclassification adjustment for realized gains included in net income	(1,551		)	543			(1,008		)	(672		)	235			(437		)
	Effect on other comprehensive income	7,247			(2,536		)	4,711			7,208			(2,523		)	4,685
	Accumulated unrealized gains on investments, net, end of period	43,218			(15,126		)	28,092			32,846			(11,496		)	21,350
	Accumulated other comprehensive income, beginning of period	36,145			(12,651		)	23,494			25,576			(8,952		)	16,624
	Change in postretirement benefit liability	16			(6		)	11			657			(230		)	427
	Change in unrealized gains on investments, net	7,247			(2,536		)	4,711			7,208			(2,523		)	4,685
	Effect on other comprehensive income	7,263			(2,542		)	4,721			7,865			(2,753		)	5,112
	Accumulated other comprehensive income, end of period	$	43,408		$	(15,193	)	$	28,216		$	33,441		$	(11,704	)	$	21,737

Subsequent_Event_Notes

Subsequent Event (Notes)	3 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event
	On April 21, 2015, we closed on a $20 million purchase for a 120,493 square foot building located in Birmingham, Alabama. The purchase was made with internally generated funds. The building will serve as our new headquarters, replacing our currently leased building. We expect to see a reduction in net operating expenses once employees are relocated to the new headquarters, which is currently planned for the first half of 2016, although no assurances can be made in this regard.

Reporting_And_Accounting_Polic1

Reporting And Accounting Policies Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Consolidation and Reporting	Basis of Consolidation and Reporting
	The accompanying consolidated financial statements are unaudited and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2014. This Quarterly Report on Form 10-Q, including the Condensed Notes to Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations, focuses on our financial performance since the beginning of the year.
	These financial statements reflect certain adjustments necessary for a fair presentation of our results of operations and financial position. Such adjustments consist of normal, recurring accruals recorded to match expenses with their related revenue streams and the elimination of all significant inter-company transactions and balances.
Estimates	Estimates
	We based certain accounts and balances within these financial statements upon our estimates and assumptions. The amount of reserves for claims not yet paid, for example, is an item that we can only record by estimation. Unrealized capital gains and losses on investments are subject to market fluctuations, and we use judgment in the determination of whether unrealized losses on certain securities are temporary or other-than-temporary. Should actual results differ significantly from these estimates, the effect on our results of operations could be material. The results of operations for the periods presented may not be indicative of our results for the entire year.
Recently Issued Accounting Standards	Recently Issued Accounting Standards
	In April 2015 the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) related to the presentation of debt issuance costs. The guidance requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability. The standard is effective for fiscal years beginning after December 15, 2015 and is to be applied retrospectively.  The new guidance will have no impact on our results of operations or financial position.
	In May 2014 the FASB issued an ASU related to the accounting for revenue from contracts with customers. Insurance contracts have been excluded from the scope of the guidance, which is effective for fiscal years beginning after December 15, 2016. We do not expect the adoption of this standard to have a material impact on our financial condition or results of operations.

Computation_of_Net_Earnings_pe

Computation of Net Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Earnings Per Common Share	The following table illustrates our computations of basic and diluted net earnings per common share ($ in thousands, except per
	share figures):
		Three months ended March 31,
		2015		2014
	Net earnings	$	11,154	$	10,327
	Average basic shares outstanding	11,427		11,429
	Basic net earnings per share	$	0.98	$	0.9
	Average basic shares outstanding	11,427		11,429
	Restricted stock not yet vested	11		57
	Dilutive effect of assumed option exercises	0		2
	Dilutive effect of Performance Share Plan	113		92
	Average diluted shares outstanding	11,551		11,580
	Diluted net earnings per share	$	0.97	$	0.89

Fair_Value_Tables

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair value by hierarchy	The following tables present, for each of the fair value hierarchy levels, our assets and liabilities for which we report fair value on a recurring basis ($ in thousands):
			Fair Value
	March 31, 2015		Level 1				Level 2				Level 3				Total
	Cash and cash equivalents		$	96,434			$	0			$	0			$	96,434
	Fixed maturity securities:
	U.S. government		66,511				58				0				66,569
	State and municipal		0				504,690				10				504,700
	Mortgage-backed securities:
	Residential		0				345,884				0				345,884
	Commercial		0				66,992				0				66,992
	Total mortgage-backed securities		0				412,876				0				412,876
	Asset-backed securities		0				62,302				46				62,348
	Corporates		0				383,583				2,946				386,529
	Total fixed maturities		66,511				1,363,509				3,002				1,433,022
	Equity securities		94,453				0				0				94,453
	Short-term investments		0				1,819				0				1,819
	Total cash and investments		$	257,398			$	1,365,328			$	3,002			$	1,625,728
	Percentage of total cash and investments		15.8		%		84		%		0.2		%		100		%
			Fair Value
	December 31, 2014		Level 1				Level 2				Level 3				Total
	Cash and cash equivalents		$	84,541			$	0			$	0			$	84,541
	Fixed maturity securities:
	U.S. government		66,847				87				0				66,933
	State and municipal		0				503,650				0				503,650
	Mortgage-backed securities:
	Residential		0				354,528				0				354,528
	Commercial		0				50,838				0				50,838
	Total mortgage-backed securities		0				405,366				0				405,366
	Asset-backed securities		0				58,457				150				58,607
	Corporates		0				394,152				3,134				397,286
	Total fixed maturities		66,847				1,361,711				3,285				1,431,843
	Equity securities		94,408				0				0				94,408
	Short-term investments		0				803				0				803
	Total cash and investments		$	245,795			$	1,362,514			$	3,285			$	1,611,594
	Percentage of total cash and investments		15.3		%		84.5		%		0.2		%		100		%
Fair value level 3 reconciliation	The following tables present the progression in the Level 3 fair value category ($ in thousands):
		Three months ended March 31, 2015
		State and				Corporates				Asset-Backed Securities				Total
		Municipal
	Balance at beginning of period	$	0			$	3,134			$	150			$	3,285
	Total gains or (losses), unrealized or realized
	Included in net earnings	(0		)		(95		)		0				(95		)
	Included in other comprehensive income	0				(14		)		0				(14		)
	Settlements	0				(80		)		(105		)		(184		)
	Transfers in	10				0				0				10
	Balance at end of period	$	10			$	2,946			$	46			$	3,002
		Three months ended March 31, 2014
		State and				Corporates				Asset-Backed Securities				Total
		Municipal
	Balance at beginning of period	$	0			$	5,175			$	686			$	5,860
	Total gains or (losses), unrealized or realized
	Included in net earnings	0				9				0				9
	Included in other comprehensive income	0				(56		)		0				(56		)
	Settlements	0				(74		)		(156		)		(230		)
	Transfers in	0				0				0				0
	Balance at end of period	$	0			$	5,054			$	530			$	5,583
Carrying Value and Estimated Fair Value	The following table presents the carrying value and estimated fair value of our financial instruments ($ in thousands):
		March 31, 2015								December 31, 2014
		Carrying				Fair				Carrying				Fair
		Value				Value				Value				Value
	Assets:
	Cash and cash equivalents	$	96,434			$	96,434			$	84,541			$	84,541
	Investments
	Fixed maturities	1,433,022				1,433,022				1,431,843				1,431,843
	Equity securities	94,453				94,453				94,408				94,408
	Short-term	1,819				1,819				803				803
	Total cash and investments	$	1,625,728			$	1,625,728			$	1,611,594			$	1,611,594
	Liabilities:
	Long-term debt	$	275,000			$	294,674			$	275,000			$	291,044

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Summarized information of investment portfolio	Summarized information for the major categories of our investment portfolio follows ($ in thousands):
		March 31, 2015
		Amortized				Gross				Gross				Fair Value			OTTI
		Cost or Cost				Unrealized				Unrealized							Recognized in
						Gains				Losses							Accumulated
																	OCI(1)
	Fixed maturities:
	U.S. government	$	66,013			$	582			$	(26	)		$	66,569		$	0
	State and municipal	493,901				10,923				(124		)		504,700			(69		)
	Mortgage-backed securities:
	Residential	339,035				7,487				(638		)		345,884			(2,781		)
	Commercial	66,885				315				(208		)		66,992			0
	Total mortgage-backed securities	405,920				$	7,802			(846		)		$	412,876		(2,781		)
	Asset-backed securities	62,107				259				(19		)		62,348			(8		)
	Corporates	379,689				7,684				(843		)		386,529			(246		)
	Total fixed maturities	1,407,631				27,249				(1,858		)		1,433,022			(3,105		)
	Equity securities	76,625				17,828				0				94,453			0
	Short-term investments	1,820				0				(1		)		1,819			0
	Total	$	1,486,075			$	45,077			$	(1,859	)		$	1,529,294		$	(3,105	)
		December 31, 2014
		Amortized				Gross				Gross				Fair Value			OTTI
		Cost or Cost				Unrealized				Unrealized							Recognized in
						Gains				Losses							Accumulated
																	OCI(1)
	Fixed maturities:
	U.S. government	$	66,625			$	502			$	(193	)		$	66,933		$	0
	State and municipal	493,350				10,637				(337		)		503,650			(69		)
	Mortgage-backed securities:
	Residential	349,371				6,547				(1,390		)		354,528			(2,914		)
	Commercial	50,914				182				(258		)		50,838			0
	Total mortgage-backed securities	400,285				6,729				(1,648		)		405,366			(2,914		)
	Asset-backed securities	58,546				131				(70		)		58,607			(8		)
	Corporates	393,611				5,999				(2,324		)		397,286			(441		)
	Total fixed maturities	1,412,417				23,998				(4,572		)		1,431,843			(3,433		)
	Equity securities	77,862				16,546				0				94,408			0
	Short-term investments	803				0				(1		)		803			0
	Total	$	1,491,082			$	40,544			$	(4,573	)		$	1,527,054		$	(3,433	)
	(1) The total non-credit portion of OTTI recognized in Accumulated OCI reflecting the original non-credit loss at the time the credit impairment was determined.
Unrealized loss by investment category and length of time	The following tables set forth the amount of unrealized loss by investment category and length of time that individual securities have been in a continuous unrealized loss position ($ in thousands):
		Less than 12 Months													12 Months or More
		Number of		Fair				Gross				Unrealized			Number of		Fair			Gross				Unrealized
		Securities		Value				Unrealized				Losses as			Securities		Value			Unrealized				Losses as
		with						Losses				% of Cost			with					Losses				% of Cost
		Unrealized													Unrealized
		Losses													Losses
	31-Mar-15
	Fixed maturities:
	U.S. government	3		$	10,945			$	(9	)		0.1	%		4		$	5,172		$	(17	)		0.3	%
	State and municipal	22		49,505				(124		)		0.2	%		0		0			0				0	%
	Mortgage-backed securities:
	Residential	34		24,701				(94		)		0.4	%		70		52,776			(544		)		1	%
	Commercial	8		24,585				(135		)		0.5	%		5		21,091			(73		)		0.3	%
	Total mortgage-backed securities	42		49,286				(230		)		0.5	%		75		73,867			(616		)		0.8	%
	Asset-backed securities	11		8,417				(9		)		0.1	%		2		1,150			(10		)		0.8	%
	Corporates	39		49,860				(739		)		1.5	%		7		9,711			(104		)		1.1	%
	Total fixed maturities	117		168,014				(1,110		)		0.7	%		88		89,900			(747		)		0.8	%
	Equity securities	0		0				0				0	%		0		0			0				0	%
	Short-term investments	2		1,531				(1		)		0.1	%		0		0			0				0	%
	Total	119		$	169,545			$	(1,111	)		0.7	%		88		$	89,900		$	(747	)		0.8	%
		Less than 12 Months														12 Months or More
		Number of			Fair				Gross				Unrealized			Number of		Fair			Gross				Unrealized
		Securities			Value				Unrealized				Losses as			Securities		Value			Unrealized				Losses as
		with							Losses				% of Cost			with					Losses				% of Cost
		Unrealized														Unrealized
		Losses														Losses
	December 31, 2014
	Fixed maturities:
	U.S. government	2			$	5,275			$	(13	)		0.3	%		8		$	21,051		$	(180	)		0.8	%
	State and municipal	45			108,721				(290		)		0.3	%		2		4,183			(47		)		1.1	%
	Mortgage-backed securities:
	Residential	24			12,855				(34		)		0.3	%		109		100,752			(1,356		)		1.3	%
	Commercial	8			15,638				(122		)		0.8	%		5		9,519			(136		)		1.4	%
	Total mortgage-backed securities	32			28,493				(156		)		0.5	%		114		110,271			(1,492		)		1.3	%
	Asset-backed securities	24			23,351				(60		)		0.3	%		2		1,150			(9		)		0.8	%
	Corporates	103			142,046				(1,820		)		1.3	%		16		19,865			(503		)		2.5	%
	Total fixed maturities	206			307,886				(2,340		)		0.8	%		142		156,521			(2,232		)		1.4	%
	Equity securities	0			0				0				0	%		0		0			0				0	%
	Short-term investments	2			803				(1		)		0.1	%		0		0			0				0	%
	Total	208			$	308,689			$	(2,341	)		0.8	%		142		$	156,521		$	(2,232	)		1.4	%
Summary of unrealized gains or losses	The following table summarizes those securities, excluding the rabbi trust, with unrealized gains or losses:
		March 31,			December 31,
		2015			2014
	Number of positions held with unrealized:
	Gains	930			778
	Losses	207			350
	Number of positions held that individually exceed unrealized:
	Gains of $500,000	3			3
	Losses of $500,000	0			0
	Percentage of positions held with unrealized:
	Gains that were investment grade	92	%		92	%
	Losses that were investment grade	85	%		84	%
	Percentage of fair value held with unrealized:
	Gains that were investment grade	92	%		94	%
	Losses that were investment grade	86	%		86	%
Unrealized loss by age and severity	The following table sets forth the amount of unrealized loss, excluding the rabbi trust, by age and severity at March 31, 2015 ($ in thousands):
	Age of Unrealized Losses:	Fair Value of				Total Gross				Less Than 5%*				5% - 10%*			Greater
		Securities with				Unrealized											Than 10%*
		Unrealized				Losses
		Losses
	Three months or less	$	121,145			$	(469	)		$	(396	)		$	(73	)	$	0
	Four months through six months	30,368				(351		)		(270		)		(37		)	(45		)
	Seven months through nine months	17,986				(291		)		(291		)		0			0
	Ten months through twelve months	4,828				(16		)		(16		)		0			0
	Greater than twelve months	85,117				(731		)		(731		)		0			0
	Total	$	259,444			$	(1,859	)		$	(1,704	)		$	(110	)	$	(45	)
	* As a percentage of amortized cost or cost.
Change in unrealized gains (losses) on marketable securities	The change in unrealized gains (losses) on marketable securities included the following ($ in thousands):
		Pre-tax
		Fixed				Equity				Short-Term Investments				Tax			Net
		Maturities				Securities								Effects
	Three months ended March 31, 2015
	Unrealized holding gains (losses) on securities arising during the period	$	6,036			$	2,380			$	(0	)		$	(2,946	)	$	5,470
	Realized gains on securities sold	(452		)		(1,098		)		0				543			(1,008		)
	Impairment loss recognized in earnings	381				0				0				(134		)	248
	Change in unrealized gains (losses) on marketable securities, net	$	5,966			$	1,282			$	(0	)		$	(2,536	)	$	4,711
	Three months ended March 31, 2014
	Unrealized holding gains on securities arising during the period	$	7,389			$	458			$	5			$	(2,748	)	$	5,104
	Realized gains on securities sold	(666		)		0				(5		)		235			(437		)
	Impairment loss recognized in earnings	27				0				0				(9		)	17
	Change in unrealized gains (losses) on marketable securities, net	$	6,750			$	458			$	(1	)		$	(2,523	)	$	4,685
Progression of credit losses on fixed maturity securities	The following table is a progression of credit losses on fixed maturity securities that were bifurcated between a credit and non-credit component ($ in thousands):
		Three months ended March 31,
		2015				2014
	Beginning balance	$	852			$	956
	Additions for:
	Previously impaired securities	0				19
	Newly impaired securities	0				8
	Reductions for:
	Securities sold and paid down	(52		)		(40		)
	Ending balance	$	799			$	943
Scheduled maturities of fixed maturity securities	The table below sets forth the scheduled maturities of fixed maturity securities at March 31, 2015, based on their fair values ($ in thousands). We report securities that do not have a single maturity date at average maturity. Actual maturities may differ from contractual maturities because certain securities may be called or prepaid by the issuers.
		Fair Value															Amortized
																	Cost
	Maturity	Securities				Securities				Securities				All Fixed			All Fixed
		with				with				with No				Maturity			Maturity
		Unrealized				Unrealized				Unrealized				Securities			Securities
		Gains				Losses				Gains or
										Losses
	One year or less	$	93,229			$	12,491			$	3,206			$	108,925		$	108,112
	After one year through five years	504,782				57,388				0				562,170			551,461
	After five years through ten years	219,377				55,314				467				275,158			269,159
	After ten years	11,545				0				0				11,545			10,871
	Mortgage- and asset-backed securities	342,503				132,720				0				475,224			468,027
	Total	$	1,171,436			$	257,913			$	3,673			$	1,433,022		$	1,407,631

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Reconciliation of provision for income taxes	The following is a reconciliation of income taxes at the statutory rate of 35.0% to the effective provision for income taxes as shown in the Consolidated Statements of Earnings ($ in thousands):
		Three months ended March 31,
		2015			2014
	Earnings before income taxes	$	16,236		$	14,647
	Income taxes at statutory rate	5,683			5,126
	Effect of:
	Dividends-received deduction	(104		)	(107		)
	Tax-exempt interest	(724		)	(702		)
	Other	228			3
	Provision for income taxes as shown on the Consolidated Statements of Earnings	$	5,082		$	4,320
	GAAP effective tax rate	31.3		%	29.5		%

Additional_Information_Tables

Additional Information (Tables)	3 Months Ended
	Mar. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	We made the following payments that we do not separately disclose in the Consolidated Statements of Cash Flows ($ in thousands):
		Three months ended March 31,
		2015		2014
	Income tax payments	$	750	$	0
	Interest payments on debt	6,875		6,875
	Interest payments on capital leases	22		16

Insurance_Reserves_Tables

Insurance Reserves (Tables)	3 Months Ended
	Mar. 31, 2015
Insurance [Abstract]
Liability for unpaid losses and LAE	The following table provides an analysis of changes in the liability for unpaid losses and LAE on a GAAP basis ($ in thousands):
		Three months ended March 31,
		2015			2014
	Balance at Beginning of Period
	Unpaid losses on known claims	$	235,037		$	221,447
	IBNR losses	277,482			262,660
	LAE	155,658			162,469
	Total unpaid losses and LAE	668,177			646,577
	Reinsurance recoverables	(14,370		)	(14,431		)
	Unpaid losses and LAE, net of reinsurance recoverables	653,808			632,146
	Current Activity
	Loss and LAE incurred:
	Current accident year	257,785			256,776
	Prior accident years	(2,142		)	(3,074		)
	Total loss and LAE incurred	255,643			253,702
	Loss and LAE payments:
	Current accident year	(81,907		)	(80,818		)
	Prior accident years	(165,770		)	(156,683		)
	Total loss and LAE payments	(247,677		)	(237,502		)
	Balance at End of Period
	Unpaid losses and LAE, net of reinsurance recoverables	661,773			648,346
	Add back reinsurance recoverables	13,982			14,544
	Total unpaid losses and LAE	675,755			662,890
	Unpaid losses on known claims	241,483			226,659
	IBNR losses	278,863			272,159
	LAE	155,409			164,072
	Total unpaid losses and LAE	$	675,755		$	662,890

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income (Loss)	The components of other comprehensive income before and after tax are as follows ($ in thousands):
		Three months ended March 31,
		2015									2014
		Before Tax			Income Tax			Net			Before Tax			Income Tax			Net
	Accumulated change in postretirement benefit liability, beginning of period	$	174		$	(61	)	$	113		$	(62	)	$	22		$	(40	)
	Effect on other comprehensive income	16			(6		)	11			657			(230		)	427
	Accumulated change in postretirement benefit liability, end of period	190			(66		)	123			595			(208		)	387
	Accumulated unrealized gains on investments, net, beginning of period	35,972			(12,590		)	23,382			25,638			(8,973		)	16,665
	Other comprehensive income before reclassification	8,416			(2,946		)	5,470			7,852			(2,748		)	5,104
	Reclassification adjustment for other-than-temporary impairments included in net income	381			(134		)	248			27			(9		)	17
	Reclassification adjustment for realized gains included in net income	(1,551		)	543			(1,008		)	(672		)	235			(437		)
	Effect on other comprehensive income	7,247			(2,536		)	4,711			7,208			(2,523		)	4,685
	Accumulated unrealized gains on investments, net, end of period	43,218			(15,126		)	28,092			32,846			(11,496		)	21,350
	Accumulated other comprehensive income, beginning of period	36,145			(12,651		)	23,494			25,576			(8,952		)	16,624
	Change in postretirement benefit liability	16			(6		)	11			657			(230		)	427
	Change in unrealized gains on investments, net	7,247			(2,536		)	4,711			7,208			(2,523		)	4,685
	Effect on other comprehensive income	7,263			(2,542		)	4,721			7,865			(2,753		)	5,112
	Accumulated other comprehensive income, end of period	$	43,408		$	(15,193	)	$	28,216		$	33,441		$	(11,704	)	$	21,737

Reporting_And_Accounting_Polic2

Reporting And Accounting Policies (Details)	Mar. 31, 2015
	states
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of states licensed to write insurance	50

Computation_of_Net_Earnings_pe1

Computation of Net Earnings per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Computation of net earnings per share
Net earnings	$11,154	$10,327	$46,874
Average basic shares outstanding (shares)	11,427	11,429
Basic net earnings per share (usd per share)	$0.98	$0.90
Average diluted shares outstanding (shares)	11,551	11,580
Diluted net earnings per share (usd per share)	$0.97	$0.89
Restricted Stock
Computation of net earnings per share
Dilutive shares (shares)	11	57
Stock Options
Computation of net earnings per share
Dilutive shares (shares)	0	2
Performance Shares
Computation of net earnings per share
Dilutive shares (shares)	113	92

Fair_Value_Fair_Value_by_Hiera

Fair Value - Fair Value by Hierarchy (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	$1,529,294	$1,527,054
Level 2 | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Long-term debt	294,700	291,000
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	96,434	84,541
Long-term debt	294,674	291,044
Fair Value | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	96,434	84,541
Total cash and investments	1,625,728	1,611,594
Percentage of total cash and investments (percent)	100.00%	100.00%
Fair Value | U.S. government | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	66,569	66,933
Fair Value | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	1,433,022	1,431,843
Fair Value | Fixed Maturities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	1,433,022	1,431,843
Fair Value | State and Municipal | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	504,700	503,650
Fair Value | Mortgage- Backed Securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	412,876	405,366
Fair Value | Residential | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	345,884	354,528
Fair Value | Commercial | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	66,992	50,838
Fair Value | Asset-backed securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	62,348	58,607
Fair Value | Corporates | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	386,529	397,286
Fair Value | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	94,453	94,408
Fair Value | Equity securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	94,453	94,408
Fair Value | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	1,819	803
Fair Value | Short-term investments | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	1,819	803
Fair Value | Level 1 | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	96,434	84,541
Total cash and investments	257,398	245,795
Percentage of total cash and investments (percent)	15.80%	15.30%
Fair Value | Level 1 | U.S. government | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	66,511	66,847
Fair Value | Level 1 | Fixed Maturities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	66,511	66,847
Fair Value | Level 1 | State and Municipal | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 1 | Mortgage- Backed Securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 1 | Residential | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 1 | Commercial | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 1 | Asset-backed securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 1 | Corporates | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 1 | Equity securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	94,453	94,408
Fair Value | Level 1 | Short-term investments | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 2 | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	0	0
Total cash and investments	1,365,328	1,362,514
Percentage of total cash and investments (percent)	84.00%	84.50%
Fair Value | Level 2 | U.S. government | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	58	87
Fair Value | Level 2 | Fixed Maturities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	1,363,509	1,361,711
Fair Value | Level 2 | State and Municipal | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	504,690	503,650
Fair Value | Level 2 | Mortgage- Backed Securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	412,876	405,366
Fair Value | Level 2 | Residential | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	345,884	354,528
Fair Value | Level 2 | Commercial | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	66,992	50,838
Fair Value | Level 2 | Asset-backed securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	62,302	58,457
Fair Value | Level 2 | Corporates | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	383,583	394,152
Fair Value | Level 2 | Equity securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 2 | Short-term investments | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	1,819	803
Fair Value | Level 3 | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	0	0
Total cash and investments	3,002	3,285
Percentage of total cash and investments (percent)	0.20%	0.20%
Fair Value | Level 3 | U.S. government | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 3 | Fixed Maturities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	3,002	3,285
Fair Value | Level 3 | State and Municipal | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	10	0
Fair Value | Level 3 | Mortgage- Backed Securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 3 | Residential | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 3 | Commercial | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 3 | Asset-backed securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	46	150
Fair Value | Level 3 | Corporates | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	2,946	3,134
Fair Value | Level 3 | Equity securities | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	0	0
Fair Value | Level 3 | Short-term investments | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments	$0	$0

Fair_Value_Level_3_Investments

Fair Value - Level 3 Investments (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	price
	Securities
Level 3 reconciliation
Balance at beginning of period	$3,285	$5,860
Included in net earnings	-95	9
Included in other comprehensive income	-14	-56
Settlements	-184	-230
Transfers in	10	0
Balance at end of period	3,002	5,583
Number of prices provided by unaffiliated money managers (prices)	1
Number of securities not rated by a nationally recognized statistical rating organization (securities)	2
State and Municipal
Level 3 reconciliation
Balance at beginning of period	0	0
Included in net earnings	0	0
Included in other comprehensive income	0	0
Settlements	0	0
Transfers in	10	0
Balance at end of period	10	0
Corporates
Level 3 reconciliation
Balance at beginning of period	3,134	5,175
Included in net earnings	-95	9
Included in other comprehensive income	-14	-56
Settlements	-80	-74
Transfers in	0	0
Balance at end of period	2,946	5,054
Asset-backed securities
Level 3 reconciliation
Balance at beginning of period	150	686
Included in net earnings	0	0
Included in other comprehensive income	0	0
Settlements	-105	-156
Transfers in	0	0
Balance at end of period	$46	$530
Level 3
Level 3 reconciliation
Number of Positions (securities)	8
Non-Binding Broker Quotes | Level 3
Level 3 reconciliation
Number of Positions (securities)	5

Fair_Value_Fair_Value_of_Finan

Fair Value - Fair Value of Financial Instruments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	$1,529,294	$1,527,054
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	96,434	84,541
Total cash and investments	1,625,728	1,611,594
Long-term debt	275,000	275,000
Carrying Value | Fixed Maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	1,433,022	1,431,843
Carrying Value | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	94,453	94,408
Carrying Value | Short-term investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	1,819	803
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	96,434	84,541
Total cash and investments	1,625,728	1,611,594
Long-term debt	294,674	291,044
Fair Value | Fixed Maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	1,433,022	1,431,843
Fair Value | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	94,453	94,408
Fair Value | Short-term investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	$1,819	$803

Investments_Textual_Details

Investments - Textual (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Available-for-sale Securities	$99,900,000	$65,000,000
Receivable for Investments Sold	3,650,000	200,000	4,549,000
Gross realized gains	2,100,000	800,000
Gross realized losses	($600,000)	($100,000)

Investments_Investments_by_maj

Investments - Investments by major category (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Fixed Maturities
Amortized Cost, Fixed Maturities	$1,407,631		$1,412,417
Fixed maturities, Fair Value	1,433,022		1,431,843
Equity Securities
Equity securities, Amortized cost	76,625		77,862
Equity securities, Fair Value	94,453		94,408
Available-for-sale securities, Amortized Cost or Cost, Total	1,486,075		1,491,082
Available-for-sale securities, Gross Unrealized Gains	45,077		40,544
Available-for-sale securities, Gross Unrealized Losses	-1,859		-4,573
Available-for-sale securities, Fair Value	1,529,294		1,527,054
Available-for-sale securities, OTTI Recognized in Accumulated OCI	-3,105	[1]	-3,433	[1]
Fixed Maturities
Fixed Maturities
Amortized Cost, Fixed Maturities	1,407,631		1,412,417
Fixed maturities, Gross Unrealized Gains	27,249		23,998
Fixed maturities, Gross Unrealized Losses	-1,858		-4,572
Fixed maturities, Fair Value	1,433,022		1,431,843
Fixed maturities, OTTI Recognized in Accumulated OCI	-3,105	[1]	-3,433	[1]
U.S. government
Fixed Maturities
Amortized Cost, Fixed Maturities	66,013		66,625
Fixed maturities, Gross Unrealized Gains	582		502
Fixed maturities, Gross Unrealized Losses	-26		-193
Fixed maturities, Fair Value	66,569		66,933
Fixed maturities, OTTI Recognized in Accumulated OCI	0	[1]	0	[1]
State and Municipal
Fixed Maturities
Amortized Cost, Fixed Maturities	493,901		493,350
Fixed maturities, Gross Unrealized Gains	10,923		10,637
Fixed maturities, Gross Unrealized Losses	-124		-337
Fixed maturities, Fair Value	504,700		503,650
Fixed maturities, OTTI Recognized in Accumulated OCI	-69	[1]	-69	[1]
Mortgage- Backed Securities
Fixed Maturities
Amortized Cost, Fixed Maturities	405,920		400,285
Fixed maturities, Gross Unrealized Gains	7,802		6,729
Fixed maturities, Gross Unrealized Losses	-846		-1,648
Fixed maturities, Fair Value	412,876		405,366
Fixed maturities, OTTI Recognized in Accumulated OCI	-2,781	[1]	-2,914	[1]
Residential
Fixed Maturities
Amortized Cost, Fixed Maturities	339,035		349,371
Fixed maturities, Gross Unrealized Gains	7,487		6,547
Fixed maturities, Gross Unrealized Losses	-638		-1,390
Fixed maturities, Fair Value	345,884		354,528
Fixed maturities, OTTI Recognized in Accumulated OCI	-2,781	[1]	-2,914	[1]
Commercial
Fixed Maturities
Amortized Cost, Fixed Maturities	66,885		50,914
Fixed maturities, Gross Unrealized Gains	315		182
Fixed maturities, Gross Unrealized Losses	-208		-258
Fixed maturities, Fair Value	66,992		50,838
Fixed maturities, OTTI Recognized in Accumulated OCI	0	[1]	0	[1]
Asset-backed securities
Fixed Maturities
Amortized Cost, Fixed Maturities	62,107		58,546
Fixed maturities, Gross Unrealized Gains	259		131
Fixed maturities, Gross Unrealized Losses	-19		-70
Fixed maturities, Fair Value	62,348		58,607
Fixed maturities, OTTI Recognized in Accumulated OCI	-8	[1]	-8	[1]
Corporates
Fixed Maturities
Amortized Cost, Fixed Maturities	379,689		393,611
Fixed maturities, Gross Unrealized Gains	7,684		5,999
Fixed maturities, Gross Unrealized Losses	-843		-2,324
Fixed maturities, Fair Value	386,529		397,286
Fixed maturities, OTTI Recognized in Accumulated OCI	-246	[1]	-441	[1]
Equity securities
Equity Securities
Equity securities, Amortized cost	76,625		77,862
Equity securities, Gross Unrealized Gains	17,828		16,546
Equity securities, Gross Unrealized Losses	0		0
Equity securities, Fair Value	94,453		94,408
Equity securities, OTTI Recognized in Accumulated OCI	0	[1]	0	[1]
Short-term investments
Equity Securities
Equity securities, Amortized cost	1,820		803
Equity securities, Gross Unrealized Gains	0		0
Equity securities, Gross Unrealized Losses	-1		-1
Equity securities, Fair Value	1,819		803
Equity securities, OTTI Recognized in Accumulated OCI	$0	[1]	$0
[1]	The total non-credit portion of OTTI recognized in Accumulated OCI reflecting the original non-credit loss at the time the credit impairment was determined.

Investments_Continuous_loss_po

Investments - Continuous loss position investments (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	207	350
Less than 12 Months
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	119	208
Less than 12 Months, Fair Value	$169,545,000	$308,689,000
Less than 12 Months, Gross Unrealized Losses	-1,111,000	-2,341,000
Unrealized Losses as Percentage of Cost	0.70%	0.80%
Less than 12 Months | Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	117	206
Less than 12 Months, Fair Value	168,014,000	307,886,000
Less than 12 Months, Gross Unrealized Losses	-1,110,000	-2,340,000
Unrealized Losses as Percentage of Cost	0.70%	0.80%
Less than 12 Months | U.S. government
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	3	2
Less than 12 Months, Fair Value	10,945,000	5,275,000
Less than 12 Months, Gross Unrealized Losses	-9,000	-13,000
Unrealized Losses as Percentage of Cost	0.10%	0.30%
Less than 12 Months | State and Municipal
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	22	45
Less than 12 Months, Fair Value	49,505,000	108,721,000
Less than 12 Months, Gross Unrealized Losses	-124,000	-290,000
Unrealized Losses as Percentage of Cost	0.20%	0.30%
Less than 12 Months | Mortgage- Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	42	32
Less than 12 Months, Fair Value	49,286,000	28,493,000
Less than 12 Months, Gross Unrealized Losses	-230,000	-156,000
Unrealized Losses as Percentage of Cost	0.50%	0.50%
Less than 12 Months | Residential
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	34	24
Less than 12 Months, Fair Value	24,701,000	12,855,000
Less than 12 Months, Gross Unrealized Losses	-94,000	-34,000
Unrealized Losses as Percentage of Cost	0.40%	0.30%
Less than 12 Months | Commercial
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	8	8
Less than 12 Months, Fair Value	24,585,000	15,638,000
Less than 12 Months, Gross Unrealized Losses	-135,000	-122,000
Unrealized Losses as Percentage of Cost	0.50%	0.80%
Less than 12 Months | Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	11	24
Less than 12 Months, Fair Value	8,417,000	23,351,000
Less than 12 Months, Gross Unrealized Losses	-9,000	-60,000
Unrealized Losses as Percentage of Cost	0.10%	0.30%
Less than 12 Months | Corporates
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	39	103
Less than 12 Months, Fair Value	49,860,000	142,046,000
Less than 12 Months, Gross Unrealized Losses	-739,000	-1,820,000
Unrealized Losses as Percentage of Cost	1.50%	1.30%
Less than 12 Months | Equity securities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	0	0
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Gross Unrealized Losses	0	0
Unrealized Losses as Percentage of Cost	0.00%	0.00%
Less than 12 Months | Short-term investments
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	2	2
Less than 12 Months, Fair Value	1,531,000	803,000
Less than 12 Months, Gross Unrealized Losses	-1,000	-1,000
Unrealized Losses as Percentage of Cost	0.10%	0.10%
12 Months or More
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	88	142
Unrealized Losses as Percentage of Cost	0.80%	1.40%
12 Months or More, Fair Value	89,900,000	156,521,000
12 Months or More, Gross Unrealized Losses	-747,000	-2,232,000
12 Months or More | Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	88	142
Unrealized Losses as Percentage of Cost	0.80%	1.40%
12 Months or More, Fair Value	89,900,000	156,521,000
12 Months or More, Gross Unrealized Losses	-747,000	-2,232,000
12 Months or More | U.S. government
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	4	8
Unrealized Losses as Percentage of Cost	0.30%	0.80%
12 Months or More, Fair Value	5,172,000	21,051,000
12 Months or More, Gross Unrealized Losses	-17,000	-180,000
12 Months or More | State and Municipal
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	0	2
Unrealized Losses as Percentage of Cost	0.00%	1.10%
12 Months or More, Fair Value	0	4,183,000
12 Months or More, Gross Unrealized Losses	0	-47,000
12 Months or More | Mortgage- Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	75	114
Unrealized Losses as Percentage of Cost	0.80%	1.30%
12 Months or More, Fair Value	73,867,000	110,271,000
12 Months or More, Gross Unrealized Losses	-616,000	-1,492,000
12 Months or More | Residential
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	70	109
Unrealized Losses as Percentage of Cost	1.00%	1.30%
12 Months or More, Fair Value	52,776,000	100,752,000
12 Months or More, Gross Unrealized Losses	-544,000	-1,356,000
12 Months or More | Commercial
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	5	5
Unrealized Losses as Percentage of Cost	0.30%	1.40%
12 Months or More, Fair Value	21,091,000	9,519,000
12 Months or More, Gross Unrealized Losses	-73,000	-136,000
12 Months or More | Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	2	2
Unrealized Losses as Percentage of Cost	0.80%	0.80%
12 Months or More, Fair Value	1,150,000	1,150,000
12 Months or More, Gross Unrealized Losses	-10,000	-9,000
12 Months or More | Corporates
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	7	16
Unrealized Losses as Percentage of Cost	1.10%	2.50%
12 Months or More, Fair Value	9,711,000	19,865,000
12 Months or More, Gross Unrealized Losses	-104,000	-503,000
12 Months or More | Equity securities
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	0	0
Unrealized Losses as Percentage of Cost	0.00%	0.00%
12 Months or More, Fair Value	0	0
12 Months or More, Gross Unrealized Losses	0	0
12 Months or More | Short-term investments
Schedule of Available-for-sale Securities [Line Items]
Number of Securities with Unrealized Losses (positions)	0	0
Unrealized Losses as Percentage of Cost	0.00%	0.00%
12 Months or More, Fair Value	0	0
12 Months or More, Gross Unrealized Losses	0	0
Maximum
Schedule of Available-for-sale Securities [Line Items]
Percentage of book value (percent)	95.00%
Minimum
Schedule of Available-for-sale Securities [Line Items]
Unrealized loss amount	$100,000

Investments_Summary_of_unreali

Investments - Summary of unrealized gains and losses (Details)	Mar. 31, 2015	Dec. 31, 2014
	Securities	Securities
Investments, Debt and Equity Securities [Abstract]
Number of positions held with unrealized gains (positions)	930	778
Number of positions held with unrealized losses (positions)	207	350
Number of positions held that individually exceed unrealized gains of $500,000 (positions)	3	3
Number of positions held that individually exceed unrealized losses of $500,000 (positions)	0	0
Percentage of positions held with unrealized gains that were investment grade (percent)	92.00%	92.00%
Percentage of positions held with unrealized losses that were investment grade (percent)	85.00%	84.00%
Percentage of fair value held with unrealized gains that were investment grade (percent)	92.00%	94.00%
Percentage of fair value held with unrealized losses that were investment grade (percent)	86.00%	86.00%

Investments_Unrealized_losses_

Investments - Unrealized losses by age and severity (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Securities with Unrealized Losses	$259,444
Total Gross Unrealized Losses	-1,859
0-3 months
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Securities with Unrealized Losses	121,145
Total Gross Unrealized Losses	-469
3-6 months
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Securities with Unrealized Losses	30,368
Total Gross Unrealized Losses	-351
6-9 months
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Securities with Unrealized Losses	17,986
Total Gross Unrealized Losses	-291
9-12 months
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Securities with Unrealized Losses	4,828
Total Gross Unrealized Losses	-16
Greater than twelve months
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Securities with Unrealized Losses	85,117
Total Gross Unrealized Losses	-731
Less Than 5% as a Percentage of Amortized Cost or Cost
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-1,704	[1]
Less Than 5% as a Percentage of Amortized Cost or Cost | 0-3 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-396	[1]
Less Than 5% as a Percentage of Amortized Cost or Cost | 3-6 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-270	[1]
Less Than 5% as a Percentage of Amortized Cost or Cost | 6-9 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-291	[1]
Less Than 5% as a Percentage of Amortized Cost or Cost | 9-12 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-16	[1]
Less Than 5% as a Percentage of Amortized Cost or Cost | Greater than twelve months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-731	[1]
5% - 10% as a Percentage of Amortized Cost or Cost
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-110	[1]
5% - 10% as a Percentage of Amortized Cost or Cost | 0-3 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-73	[1]
5% - 10% as a Percentage of Amortized Cost or Cost | 3-6 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-37	[1]
5% - 10% as a Percentage of Amortized Cost or Cost | 6-9 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	0	[1]
5% - 10% as a Percentage of Amortized Cost or Cost | 9-12 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	0	[1]
5% - 10% as a Percentage of Amortized Cost or Cost | Greater than twelve months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	0	[1]
Greater Than 10% as a Percentage of Amortized Cost or Cost
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-45	[1]
Greater Than 10% as a Percentage of Amortized Cost or Cost | 0-3 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	0	[1]
Greater Than 10% as a Percentage of Amortized Cost or Cost | 3-6 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	-45	[1]
Greater Than 10% as a Percentage of Amortized Cost or Cost | 6-9 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	0	[1]
Greater Than 10% as a Percentage of Amortized Cost or Cost | 9-12 months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	0	[1]
Greater Than 10% as a Percentage of Amortized Cost or Cost | Greater than twelve months
Schedule of Available-for-sale Securities [Line Items]
Total Gross Unrealized Losses	$0	[1]
[1]	As a percentage of amortized cost or cost.

Investments_Change_in_unrealiz

Investments - Change in unrealized gains and losses (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Unrealized holding gains (losses) arising during the period	$8,416	$7,852
Unrealized holding gains (losses) on securities arising during the period, tax effects	-2,946	-2,748
Unrealized holding gains (losses) on securities arising during period, net of tax	5,470	5,104
Realized gains on securities sold, pre-tax	-1,551	-672
Realized gains on securities sold, tax effects	543	235
Realized gains on securities sold, net of tax	-1,008	-437
Impairment loss recognized in earnings, pre-tax	381	27
Impairment loss recognized in earnings, tax effects	-134	-9
Impairment loss recognized in earnings	248	17
Change in unrealized gains (losses) on marketable securities, net, pre-tax	7,247	7,208
Change in unrealized gains (losses) on marketable securities, net, tax effects	-2,536	-2,523
Change in unrealized gains (losses) on marketable securities, net, net of tax	4,711	4,685
Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Unrealized holding gains (losses) arising during the period	6,036	7,389
Realized gains on securities sold, pre-tax	-452	-666
Impairment loss recognized in earnings, pre-tax	381	27
Change in unrealized gains (losses) on marketable securities, net, pre-tax	5,966	6,750
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Unrealized holding gains (losses) arising during the period	2,380	458
Realized gains on securities sold, pre-tax	-1,098	0
Impairment loss recognized in earnings, pre-tax	0	0
Change in unrealized gains (losses) on marketable securities, net, pre-tax	1,282	458
Short-term investments
Schedule of Available-for-sale Securities [Line Items]
Unrealized holding gains (losses) arising during the period	0	5
Realized gains on securities sold, pre-tax	0	-5
Impairment loss recognized in earnings, pre-tax	0	0
Change in unrealized gains (losses) on marketable securities, net, pre-tax	$0	($1)

Investments_Credit_losses_roll

Investments - Credit losses rollforward (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Credit losses on fixed maturity securities
Beginning balance	$852	$956
Additions for: Previously impaired securities	0	19
Additions for: Newly impaired securities	0	8
Reductions for: Securities sold and paid down	-52	-40
Ending balance	$799	$943

Investments_Investments_by_con

Investments - Investments by contractual maturity (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
One year or less, fair value	$108,925
One year or less, amortized cost	108,112
After one year through five years, fair value	562,170
After one year through five years, amortized cost	551,461
After five years through ten years, fair value	275,158
After five years through ten years, amortized cost	269,159
After ten years, fair value	11,545
After ten years, amortized cost basis	10,871
Mortgage-backed, asset-backed and collateralized mortgage obligations, fair value	475,224
Mortgage-backed, asset-backed and collateralized mortgage obligations, amortized cost	468,027
Fair Value, Fixed maturities	1,433,022	1,431,843
Amortized Cost, Fixed Maturities	1,407,631	1,412,417
Securities with Unrealized Gains
Schedule of Available-for-sale Securities [Line Items]
One year or less, fair value	93,229
After one year through five years, fair value	504,782
After five years through ten years, fair value	219,377
After ten years, fair value	11,545
Mortgage-backed, asset-backed and collateralized mortgage obligations, fair value	342,503
Fair Value, Fixed maturities	1,171,436
Securities with Unrealized Losses
Schedule of Available-for-sale Securities [Line Items]
One year or less, fair value	12,491
After one year through five years, fair value	57,388
After five years through ten years, fair value	55,314
After ten years, fair value	0
Mortgage-backed, asset-backed and collateralized mortgage obligations, fair value	132,720
Fair Value, Fixed maturities	257,913
Securities with No Unrealized Gains or Losses
Schedule of Available-for-sale Securities [Line Items]
One year or less, fair value	3,206
After one year through five years, fair value	0
After five years through ten years, fair value	467
After ten years, fair value	0
Mortgage-backed, asset-backed and collateralized mortgage obligations, fair value	0
Fair Value, Fixed maturities	$3,673

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)	1 Months Ended		3 Months Ended
	Aug. 31, 2014	Sep. 30, 2012	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt, fair value			$294,674,000	$291,044,000
Basis points			1.96%
US Treasury Note
Debt Instrument [Line Items]
Effective percentage (percent)			1.93%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility capacity	50,000,000
Term of revolving credit facility (years)	3 years
Senior Notes Due 2022 | Senior Notes
Debt Instrument [Line Items]
Principal amount		275,000,000
Coupon rate (percent)		5.00%
Capitalized debt issuance costs		2,200,000
Long-term debt, fair value			$294,700,000
Term of note used (years)			10 years

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Federal statutory income tax rate (percent)	35.00%
Income tax reconciliation
Earnings before income taxes	$16,236	$14,647
Income taxes at statutory rate	5,683	5,126
Dividends-received deduction	-104	-107
Tax-exempt interest	-724	-702
Other	228	3
Provision for income taxes as shown on the Consolidated Statements of Earnings	$5,082	$4,320
GAAP effective tax rate (percent)	31.30%	29.50%

Additional_Information_Details

Additional Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]
Income tax payments	$750,000	$0
Interest payments on debt	6,875,000	6,875,000
Interest payments on capital leases	22,000	16,000
Negative cash book balances	$54,500,000		$51,200,000

Insurance_Reserves_Details

Insurance Reserves (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Unpaid losses on known claims, balance at beginning of period	$235,037	$221,447
IBNR losses, balance at beginning of period	277,482	262,660
LAE, balance at beginning of period	155,658	162,469
Total unpaid losses and LAE, balance at beginning of period	668,177	646,577
Reinsurance recoverables, balance at beginning of period	-14,370	-14,431
Unpaid losses and LAE, net of reinsurance recoverables, balance at beginning of period	653,808	632,146
Loss and LAE incurred, current accident year	257,785	256,776
Loss and LAE incurred, Prior accident years	-2,142	-3,074
Total loss and LAE incurred	255,643	253,702
Loss and LAE payments, current accident year	-81,907	-80,818
Loss and LAE payments, prior accident years	-165,770	-156,683
Total loss and LAE payments	-247,677	-237,502
Unpaid losses and LAE, net of reinsurance recoverables, balance at end of period	661,773	648,346
Add back reinsurance recoverables, balance at end of period	13,982	14,544
Total unpaid losses and LAE, balance at end of period	675,755	662,890
Unpaid losses on known claims, balance at end of period	241,483	226,659
IBNR losses, balance at end of period	278,863	272,159
LAE, balance at end of period	$155,409	$164,072

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Before Tax [Abstract]
Accumulated other comprehensive income, beginning of period	$36,145	$25,576
Effect on other comprehensive income	7,263	7,865
Accumulated other comprehensive income, end of period	43,408	33,441
Income Tax [Abstract]
Accumulated other comprehensive income, beginning of period	-12,651	-8,952
Effect on other comprehensive income	-2,542	-2,753
Accumulated other comprehensive income, end of period	-15,193	-11,704
Net [Abstract]
Accumulated other comprehensive income, beginning of period	23,494	16,624
Other comprehensive income, net of tax	4,721	5,112
Accumulated other comprehensive income, end of period	28,216	21,737
Accumulated Change Postretirement Benefite Liability [Member]
Before Tax [Abstract]
Accumulated other comprehensive income, beginning of period	174	-62
Effect on other comprehensive income	16	657
Accumulated other comprehensive income, end of period	190	595
Income Tax [Abstract]
Accumulated other comprehensive income, beginning of period	-61	22
Effect on other comprehensive income	-6	-230
Accumulated other comprehensive income, end of period	-66	-208
Net [Abstract]
Accumulated other comprehensive income, beginning of period	113	-40
Other comprehensive income, net of tax	11	427
Accumulated other comprehensive income, end of period	123	387
Accumulated Unrealized Gains on Investments, net [Member]
Before Tax [Abstract]
Accumulated other comprehensive income, beginning of period	35,972	25,638
Effect on other comprehensive income	7,247	7,208
Other comprehensive income before reclassification	8,416	7,852
Accumulated other comprehensive income, end of period	43,218	32,846
Income Tax [Abstract]
Accumulated other comprehensive income, beginning of period	-12,590	-8,973
Other comprehensive income before reclassification	-2,946	-2,748
Effect on other comprehensive income	-2,536	-2,523
Accumulated other comprehensive income, end of period	-15,126	-11,496
Net [Abstract]
Accumulated other comprehensive income, beginning of period	23,382	16,665
Other comprehensive income before reclassification	5,470	5,104
Other comprehensive income, net of tax	4,711	4,685
Accumulated other comprehensive income, end of period	28,092	21,350
Reclassification Adjustment for Other-than-Temporary Impairment [Member]
Before Tax [Abstract]
Reclassicification adjustment	381	27
Income Tax [Abstract]
Reclassicification adjustment	-134	-9
Net [Abstract]
Reclassicification adjustment	248	17
Accumulated Unrealized Gains on Investments, Net [Member]
Before Tax [Abstract]
Effect on other comprehensive income	7,247	7,208
Reclassicification adjustment	-1,551	-672
Income Tax [Abstract]
Reclassicification adjustment	543	235
Effect on other comprehensive income	-2,536	-2,523
Net [Abstract]
Reclassicification adjustment	-1,008	-437
Other comprehensive income, net of tax	$4,711	$4,685

Subsequent_Event_Details

Subsequent Event (Details) (Subsequent Event, Building, USD $)	0 Months Ended
In Millions, unless otherwise specified	Apr. 21, 2015
	sqft
Subsequent Event | Building
Subsequent Event [Line Items]
Property purchased	$20
Number of square feet	120,493