$SIGI
Selective Insurance Group Inc Stock $sigi

$sigi Overview Financials Valuation SEC Filings Company Website

2013 Q2 Form 10-Q Financial Statement

#000023055713000012 Filed on August 01, 2013

Income Statement

Concept	2013 Q2	2012 Q2
Revenue	$468.9M	$428.9M
YoY Change	9.33%	7.34%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$10.00M	$9.900M
YoY Change	1.01%	19.28%
% of Gross Profit
Operating Expenses	$427.1M	$424.9M
YoY Change	0.52%	7.54%
Operating Profit
YoY Change
Interest Expense	-$5.600M	-$4.700M
YoY Change	19.15%	2.17%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$36.20M	-$692.0K
YoY Change	-5331.36%	598.99%
Income Tax	$9.079M	-$980.0K
% Of Pretax Income	25.08%
Net Earnings	$27.12M	$288.0K
YoY Change	9317.36%	-80.37%
Net Earnings / Revenue	5.78%	0.07%
Basic Earnings Per Share	$0.49	$0.01
Diluted Earnings Per Share	$0.48	$0.01
COMMON SHARES
Basic Shares Outstanding	55.73M shares	54.95M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2013 Q2	2012 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments
Other Short-Term Assets	$140.8M	$136.8M
YoY Change	2.92%	18.03%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$177.2M	$172.9M
YoY Change	2.49%	13.38%
LONG-TERM ASSETS
Property, Plant & Equipment	$48.84M	$45.69M
YoY Change	6.9%	14.22%
Goodwill	$7.849M	$7.849M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$4.367B	$4.176B
YoY Change	4.57%	4.21%
Other Assets	$135.9M	$113.9M
YoY Change	19.32%	29.58%
Total Long-Term Assets	$5.935B	$5.515B
YoY Change	7.63%	5.7%
TOTAL ASSETS
Total Short-Term Assets	$177.2M	$172.9M
Total Long-Term Assets	$5.935B	$5.515B
Total Assets	$6.113B	$5.687B
YoY Change	7.48%	5.92%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$102.2M	$113.6M
YoY Change	-10.04%	13.15%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$102.2M	$113.6M
YoY Change	-10.04%	13.15%
LONG-TERM LIABILITIES
Long-Term Debt	$392.4M	$307.4M
YoY Change	27.65%	17.19%
Other Long-Term Liabilities	$200.8M	$166.2M
YoY Change	20.82%	11.77%
Total Long-Term Liabilities	$593.2M	$473.6M
YoY Change	25.25%	15.23%
TOTAL LIABILITIES
Total Short-Term Liabilities	$102.2M	$113.6M
Total Long-Term Liabilities	$593.2M	$473.6M
Total Liabilities	$5.014B	$4.602B
YoY Change	8.93%	7.82%
SHAREHOLDERS EQUITY
Retained Earnings	$1.159B	$1.120B
YoY Change	3.46%
Common Stock	$479.8M	$461.7M
YoY Change	3.94%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$558.9M	$555.3M
YoY Change	0.66%
Treasury Stock Shares	43.18M shares	43.01M shares
Shareholders Equity	$1.099B	$1.085B
YoY Change
Total Liabilities & Shareholders Equity	$6.113B	$5.687B
YoY Change	7.48%	5.92%

Cashflow Statement

Concept	2013 Q2	2012 Q2
OPERATING ACTIVITIES
Net Income	$27.12M	$288.0K
YoY Change	9317.36%	-80.37%
Depreciation, Depletion And Amortization	$10.00M	$9.900M
YoY Change	1.01%	19.28%
Cash From Operating Activities	$69.80M	$16.30M
YoY Change	328.22%	-48.74%
INVESTING ACTIVITIES
Capital Expenditures	-$3.100M	-$4.500M
YoY Change	-31.11%	221.43%
Acquisitions
YoY Change
Other Investing Activities	-$62.50M	-$6.500M
YoY Change	861.54%	-74.31%
Cash From Investing Activities	-$65.60M	-$11.00M
YoY Change	496.36%	-58.96%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-4.400M	-5.300M
YoY Change	-16.98%	0.0%
NET CHANGE
Cash From Operating Activities	69.80M	16.30M
Cash From Investing Activities	-65.60M	-11.00M
Cash From Financing Activities	-4.400M	-5.300M
Net Change In Cash	-200.0K	0.000000008382
YoY Change	-2386092942221954.0%	-100.0%
FREE CASH FLOW
Cash From Operating Activities	$69.80M	$16.30M
Capital Expenditures	-$3.100M	-$4.500M
Free Cash Flow	$72.90M	$20.80M
YoY Change	250.48%	-37.35%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	35984000	USD
CY2013Q2	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	36376000	USD
CY2012Q4	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	152396000	USD
CY2013Q2	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	102223000	USD
CY2013Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	174226000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	169428000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	57137000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	121391000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	37961000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	68287000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	54040000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	19278000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxDebtSecurities	1658000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxDebtSecurities	1600000	USD
CY2013Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	282014000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	270654000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	49468000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	33778000	USD
CY2013Q2	us-gaap	Assets Assets	6112627000	USD
CY2012Q4	us-gaap	Assets Assets	6794216000	USD
CY2013Q2	us-gaap	Assumed Premiums Earned Property And Casualty AssumedPremiumsEarnedPropertyAndCasualty	8951000	USD
	us-gaap	Assumed Premiums Earned Property And Casualty AssumedPremiumsEarnedPropertyAndCasualty	21414000	USD
	us-gaap	Assumed Premiums Earned Property And Casualty AssumedPremiumsEarnedPropertyAndCasualty	31088000	USD
CY2012Q2	us-gaap	Assumed Premiums Earned Property And Casualty AssumedPremiumsEarnedPropertyAndCasualty	16039000	USD
	us-gaap	Assumed Premiums Written Property And Casualty AssumedPremiumsWrittenPropertyAndCasualty	26736000	USD
	us-gaap	Assumed Premiums Written Property And Casualty AssumedPremiumsWrittenPropertyAndCasualty	12860000	USD
CY2013Q2	us-gaap	Assumed Premiums Written Property And Casualty AssumedPremiumsWrittenPropertyAndCasualty	4378000	USD
CY2012Q2	us-gaap	Assumed Premiums Written Property And Casualty AssumedPremiumsWrittenPropertyAndCasualty	4747000	USD
CY2013Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3363994000	USD
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3130683000	USD
CY2013Q2	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	142434000	USD
CY2012Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	132441000	USD
CY2013Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	3591875000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	3447395000	USD
CY2013Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3506428000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3263124000	USD
CY2013Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1245520000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	125166000	USD
CY2013Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	9616000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	19736000	USD
CY2013Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1202597000	USD
CY2013Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1840956000	USD
CY2013Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	49804000	USD
CY2013Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	326454000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3296013000	USD
CY2013Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3419811000	USD
CY2012Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	151382000	USD
CY2013Q2	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	172064000	USD
CY2013Q2	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	-46190000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	-2834000	USD
CY2013Q2	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-891000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-1558000	USD
CY2013Q2	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-45299000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-1276000	USD
CY2013Q2	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	-131637000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	-187105000	USD
	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Basis of Presentation</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">These interim unaudited consolidated financial statements (“Financial Statements”) include the accounts of the Parent and its subsidiaries, and have been prepared in conformity with: (i) U.S. generally accepted accounting principles (“GAAP”); and (ii) the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. The preparation of the Financial Statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported financial statement balances, as well as the disclosure of contingent assets and liabilities. Actual results could differ from those estimates. All significant intercompany accounts and transactions between the Parent and its subsidiaries are eliminated in consolidation.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain amounts in our prior years' Financial Statements and related notes have been reclassified to conform to the 2013 presentation. Such reclassifications had no effect on our net income, stockholders' equity, or cash flows.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">These Financial Statements reflect all adjustments that, in our opinion, are normal, recurring, and necessary for a fair presentation of our results of operations and financial condition. The Financial Statements cover the </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">second</font><font style="font-family:inherit;font-size:10pt;"> quarters ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June 30, 2013</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Second Quarter 2013</font><font style="font-family:inherit;font-size:10pt;">”) and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June 30, 2012</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Second Quarter 2012</font><font style="font-family:inherit;font-size:10pt;">”) and the six-month periods ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June 30, 2013</font><font style="font-family:inherit;font-size:10pt;"> ("</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Six Months 2013</font><font style="font-family:inherit;font-size:10pt;">") and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June 30, 2012</font><font style="font-family:inherit;font-size:10pt;"> ("</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Six Months 2012</font><font style="font-family:inherit;font-size:10pt;">"). The Financial Statements do not include all of the information and disclosures required by GAAP and the SEC for audited financial statements. Results of operations for any interim period are not necessarily indicative of results for a full year. Consequently, the Financial Statements should be read in conjunction with the consolidated financial statements contained in our Annual Report on Form 10-K for the year ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2012</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2012 Annual Report</font><font style="font-family:inherit;font-size:10pt;">”).</font></div></div>
CY2013Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	432744000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	825756000	USD
CY2012Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	429599000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	863825000	USD
CY2012Q4	us-gaap	Cash Cash	210000	USD
CY2013Q2	us-gaap	Cash Cash	154000	USD
CY2012Q2	us-gaap	Cash Cash	141000	USD
CY2011Q4	us-gaap	Cash Cash	762000	USD
	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	-621000	USD
	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	-56000	USD
CY2013Q2	us-gaap	Ceded Premiums Earned Property And Casualty CededPremiumsEarnedPropertyAndCasualty	86780000	USD
CY2012Q2	us-gaap	Ceded Premiums Earned Property And Casualty CededPremiumsEarnedPropertyAndCasualty	87157000	USD
	us-gaap	Ceded Premiums Earned Property And Casualty CededPremiumsEarnedPropertyAndCasualty	175365000	USD
	us-gaap	Ceded Premiums Earned Property And Casualty CededPremiumsEarnedPropertyAndCasualty	172369000	USD
CY2012Q2	us-gaap	Ceded Premiums Written Property And Casualty CededPremiumsWrittenPropertyAndCasualty	86704000	USD
CY2013Q2	us-gaap	Ceded Premiums Written Property And Casualty CededPremiumsWrittenPropertyAndCasualty	93391000	USD
	us-gaap	Ceded Premiums Written Property And Casualty CededPremiumsWrittenPropertyAndCasualty	164487000	USD
	us-gaap	Ceded Premiums Written Property And Casualty CededPremiumsWrittenPropertyAndCasualty	180565000	USD
CY2013Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
CY2013Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2012Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2013Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2013Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	98194224	shares
CY2013Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	98910399	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	196388000	USD
CY2013Q2	us-gaap	Common Stock Value CommonStockValue	197821000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34591000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-35521000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13668000	USD
CY2012Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5808000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13674000	USD
CY2013Q2	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6221000	USD
CY2012Q2	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-500000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6678000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1968000	USD
CY2013Q2	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2858000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2560000	USD
CY2012Q2	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-480000	USD
CY2013Q2	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	165078000	USD
CY2012Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	155523000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	-16638000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	-9555000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	119136000	USD
CY2013Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	135886000	USD
	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	-16000	USD
	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	0	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	23103000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	19550000	USD
	us-gaap	Direct Premiums Earned Property And Casualty DirectPremiumsEarnedPropertyAndCasualty	915318000	USD
CY2013Q2	us-gaap	Direct Premiums Earned Property And Casualty DirectPremiumsEarnedPropertyAndCasualty	504081000	USD
CY2012Q2	us-gaap	Direct Premiums Earned Property And Casualty DirectPremiumsEarnedPropertyAndCasualty	463330000	USD
	us-gaap	Direct Premiums Earned Property And Casualty DirectPremiumsEarnedPropertyAndCasualty	998147000	USD
	us-gaap	Direct Premiums Written Property And Casualty DirectPremiumsWrittenPropertyAndCasualty	1080006000	USD
	us-gaap	Direct Premiums Written Property And Casualty DirectPremiumsWrittenPropertyAndCasualty	983486000	USD
CY2013Q2	us-gaap	Direct Premiums Written Property And Casualty DirectPremiumsWrittenPropertyAndCasualty	551190000	USD
CY2012Q2	us-gaap	Direct Premiums Written Property And Casualty DirectPremiumsWrittenPropertyAndCasualty	507520000	USD
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.34
CY2013Q1	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	-1500000	USD
CY2013Q2	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-997000	USD
CY2012Q2	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	538000	USD
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1467000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	873000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	1205000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-3809000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-1089000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	0	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	12911000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	0	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	0	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	3821000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	3742000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	12642000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	36529000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	8533000	USD
CY2013Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	4531000	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	42277000	USD
CY2011Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	27910000	USD
CY2013Q2	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	62200000	USD
CY2013Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	58000000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	11013000	USD
CY2013Q2	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	5709000	USD
CY2012Q2	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	272000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	5051000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	7849000	USD
CY2013Q2	us-gaap	Goodwill Goodwill	7849000	USD
CY2013Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	479507000	USD
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	554069000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	180000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1218000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3505000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3968000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	38777000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	35044000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	369227000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	348188000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	3535000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	2888000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities Fair Value HeldToMaturitySecuritiesDebtMaturitiesFairValue	507625000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	96086000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	93387000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	507625000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	594661000	USD
CY2013Q2	us-gaap	Held To Maturity Securities Transferred Security At Carrying Value HeldToMaturitySecuritiesTransferredSecurityAtCarryingValue	22900000	USD
	us-gaap	Held To Maturity Securities Transferred To Available For Sale Securities Unrealized Gain Loss HeldToMaturitySecuritiesTransferredToAvailableForSaleSecuritiesUnrealizedGainLoss	1100000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	297000	USD
CY2012Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	40000	USD
CY2013Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	508000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	2427000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	49427000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	288000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	18381000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	27122000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-692000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	36201000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	65069000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	22499000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.01
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.89
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.49
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.88
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.48
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.33
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.01
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-419000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-496000	USD
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-980000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9079000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4118000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15642000	USD
CY2012Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	2569000	USD
CY2013Q2	us-gaap	Income Tax Receivable IncomeTaxReceivable	1904000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-5699000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-6173000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-3058000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	3171000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	500000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	1066000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	4526000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-5823000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	57294000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	84135000	USD
	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-4500000	USD
	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-5478000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	549443000	USD
CY2013Q2	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	279594000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	540809000	USD
CY2012Q2	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	287903000	USD
CY2012Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	4723000	USD
CY2013Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	5570000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	11401000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	9423000	USD
	us-gaap	Interest Paid InterestPaid	9389000	USD
	us-gaap	Interest Paid InterestPaid	10295000	USD
CY2012Q4	us-gaap	Investments Investments	4330019000	USD
CY2013Q2	us-gaap	Investments Investments	4366958000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	8509000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	5703624000	USD
CY2013Q2	us-gaap	Liabilities Liabilities	5013582000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6794216000	USD
CY2013Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6112627000	USD
CY2013Q2	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3270114000	USD
CY2012Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	4068941000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	307387000	USD
CY2013Q2	us-gaap	Long Term Debt LongTermDebt	392400000	USD
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"> Organization</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Selective Insurance Group, Inc., through its subsidiaries, (collectively referred to as “we,” “us,” or “our”) offers standard and excess and surplus lines (“E&S”) property and casualty insurance products. Selective Insurance Group, Inc. (referred to as the “Parent”) was incorporated in New Jersey in 1977 and its main offices are located in Branchville, New Jersey. The Parent’s common stock is publicly traded on the NASDAQ Global Select Market under the symbol “SIGI.” </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We classify our business into </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">three</font><font style="font-family:inherit;font-size:10pt;"> operating segments: </font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our Standard Insurance Operations segment, which is comprised of both commercial lines ("Commercial Lines") and personal lines ("Personal Lines") business, sells property and casualty insurance products and services in the standard market, including flood insurance through the National Flood Insurance Program's ("NFIP") write-your-own ("WYO") program;</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our E&S Insurance Operations segment, which is comprised of Commercial Lines property and casualty insurance products and services that are unavailable in the standard market due to market conditions or characteristics of the insured that are caused by the insured's claim history or the characteristics of their business; and</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our Investments segment - invests the premiums collected by our Standard and E&S Insurance Operations, as well as amounts generated through our capital management strategies, which may include the issuance of debt and equity securities.</font></div></td></tr></table></div>
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	66718000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13446000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-164672000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-39334000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	97898000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	52159000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18381000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	288000	USD
	us-gaap	Net Income Loss NetIncomeLoss	48430000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	27122000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3
CY2012Q4	us-gaap	Other Assets OtherAssets	57661000	USD
CY2013Q2	us-gaap	Other Assets OtherAssets	87737000	USD
	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-4000	USD
	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-26000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-13000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	28600000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Income OtherIncome	6320000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	15400000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostBeforeTax	-10000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostBeforeTax	-75000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostBeforeTax	-37000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-49000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-24000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-6000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-64254000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-53480000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	24937000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	8491000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-96374000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-62643000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-34762000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	16210000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5520000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-28600000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-46655000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-2856000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-1428000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-789000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1857000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-929000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-30326000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-513000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	44000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-16329000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-999000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-499000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-276000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-7322000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	920000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	973000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	486000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	276000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-18718000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	8727000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	2971000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-33731000	USD
	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	2629000	USD
	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	2781000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	1391000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	789000	USD
	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	1709000	USD
	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	1808000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	548000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-255000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	513000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	905000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-87630000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	27653000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	7849000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-91314000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	5101000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	17974000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-59353000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-56959000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-30671000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	9679000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2748000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-31961000	USD
CY2013Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3852000	USD
CY2012Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	5754000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	19725000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	16347000	USD
CY2013Q2	us-gaap	Other General Expense OtherGeneralExpense	1869000	USD
	us-gaap	Other General Expense OtherGeneralExpense	10923000	USD
	us-gaap	Other General Expense OtherGeneralExpense	15556000	USD
CY2012Q2	us-gaap	Other General Expense OtherGeneralExpense	3191000	USD
CY2013Q2	us-gaap	Other Income OtherIncome	3536000	USD
	us-gaap	Other Income OtherIncome	6044000	USD
CY2012Q2	us-gaap	Other Income OtherIncome	2511000	USD
CY2013Q2	us-gaap	Other Investments OtherInvestments	109077000	USD
CY2012Q4	us-gaap	Other Investments OtherInvestments	114076000	USD
CY2013Q2	us-gaap	Other Liabilities OtherLiabilities	200834000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	200194000	USD
CY2013Q2	us-gaap	Other Short Term Investments OtherShortTermInvestments	186499000	USD
CY2012Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	214479000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	11000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	173000	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	64000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	2000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	6775000	USD
CY2011Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	6602000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2012Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7477000	USD
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	6711000	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7486000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	151113	shares
CY2012Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2013Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	173620	shares
CY2013Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	218000	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	54000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	77000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	47000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-58000	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	94000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	555000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	515000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	2504000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	6793000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	6761000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3285000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3102000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	13668000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	13442000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	530402000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	426346000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	42546000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	40430000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4393000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	6355000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	795707000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	1116873000	USD
CY2013Q2	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	338954000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	704600000	USD
CY2012Q2	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	301451000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	553654000	USD
CY2013Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2012Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2013Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2013Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	847192000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	771041000	USD
CY2012Q2	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	392212000	USD
CY2013Q2	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	426252000	USD
CY2012Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	3906000	USD
CY2013Q2	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	4478000	USD
CY2013Q2	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	568523000	USD
CY2012Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	484388000	USD
CY2012Q2	us-gaap	Premiums Written Net Property And Casualty PremiumsWrittenNetPropertyAndCasualty	425563000	USD
	us-gaap	Premiums Written Net Property And Casualty PremiumsWrittenNetPropertyAndCasualty	845735000	USD
	us-gaap	Premiums Written Net Property And Casualty PremiumsWrittenNetPropertyAndCasualty	912301000	USD
CY2013Q2	us-gaap	Premiums Written Net Property And Casualty PremiumsWrittenNetPropertyAndCasualty	462177000	USD
CY2012Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	132637000	USD
CY2013Q2	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	140833000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	445000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	1225000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	6077000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	8443000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	178435000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	3769000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	2225000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	286905000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	197199000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	48186000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	57152000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	95900000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	49100000	USD
CY2012Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	24100000	USD
CY2013Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	42200000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	37699000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	6851000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	42206000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	58176000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	876928000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1144853000	USD
CY2013Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	48841000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	47131000	USD
CY2012Q2	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	178000	USD
CY2013Q2	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	5154000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	4536000	USD
CY2013Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	6420000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	15494000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	21069000	USD
CY2012Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	10470000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	33914000	USD
CY2012Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	24018000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	170651000	USD
CY2013Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	65780000	USD
CY2013Q2	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	552488000	USD
CY2012Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1421109000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	100000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1125154000	USD
CY2013Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1158861000	USD
CY2013Q2	us-gaap	Revenues Revenues	468945000	USD
	us-gaap	Revenues Revenues	928894000	USD
	us-gaap	Revenues Revenues	848255000	USD
CY2012Q2	us-gaap	Revenues Revenues	428907000	USD
CY2012Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	245000	USD
CY2013Q2	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	468937000	USD
	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	848106000	USD
CY2012Q2	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	428834000	USD
	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	928822000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	6189000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	5160000	USD
	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	46603	shares
	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	33514	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	682661	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	667500	shares
CY2013Q2	us-gaap	Stockholders Equity StockholdersEquity	1099045000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1090592000	USD
CY2012Q2	us-gaap	Stockholders Equity StockholdersEquity	1085046000	USD
CY2013Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	43181889	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	43030776	shares
CY2013Q2	us-gaap	Treasury Stock Value TreasuryStockValue	558929000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	555644000	USD
CY2013Q2	us-gaap	Unearned Premiums UnearnedPremiums	1048011000	USD
CY2012Q4	us-gaap	Unearned Premiums UnearnedPremiums	974706000	USD
	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2013Q2	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2012Q2	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2012Q4	sigi	Accumulated Other Comprehensive Income Loss Held To Maturity Related Net Unrealized Gain Loss AccumulatedOtherComprehensiveIncomeLossHeldToMaturityRelatedNetUnrealizedGainLoss	2594000	USD
CY2013Q2	sigi	Accumulated Other Comprehensive Income Loss Held To Maturity Related Net Unrealized Gain Loss AccumulatedOtherComprehensiveIncomeLossHeldToMaturityRelatedNetUnrealizedGainLoss	1702000	USD
CY2012Q4	sigi	Accumulated Other Comprehensive Income Loss Invemesnts Netof Tax AccumulatedOtherComprehensiveIncomeLossInvemesntsNetofTax	122327000	USD
CY2013Q2	sigi	Accumulated Other Comprehensive Income Loss Invemesnts Netof Tax AccumulatedOtherComprehensiveIncomeLossInvemesntsNetofTax	57239000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	1331000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	1565000	USD
CY2012Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	701000	USD
CY2013Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	614000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	466000	USD
CY2012Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	1309000	USD
CY2013Q2	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1245700000	USD
	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	-3614000	USD
	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	12845000	USD
CY2012Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	126384000	USD
CY2013Q2	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	1628000	USD
CY2013Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	215000	USD
	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Before Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesBeforeTax	-13000	USD
	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Before Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesBeforeTax	-263000	USD
CY2012Q2	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Before Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesBeforeTax	-60000	USD
CY2013Q2	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Before Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesBeforeTax	-6000	USD
	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Net Of Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesNetOfTax	-8000	USD
CY2012Q2	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Net Of Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesNetOfTax	-39000	USD
	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Net Of Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesNetOfTax	-171000	USD
CY2013Q2	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Net Of Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesNetOfTax	-3000	USD
	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesTax	5000	USD
	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesTax	92000	USD
CY2012Q2	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesTax	21000	USD
CY2013Q2	sigi	Amortization Of Non Credit Other Than Temporary Impairment Losses On Held To Maturity Securities Tax AmortizationOfNonCreditOtherThanTemporaryImpairmentLossesOnHeldToMaturitySecuritiesTax	3000	USD
CY2012Q2	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Net Of Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetOfTax	456000	USD
	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Net Of Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetOfTax	1017000	USD
CY2013Q2	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Net Of Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetOfTax	399000	USD
	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Net Of Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetOfTax	865000	USD
CY2013Q2	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	45302000	USD
CY2012Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	2445000	USD
CY2013Q2	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	13121000	USD
CY2012Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	23704000	USD
CY2013Q2	sigi	Carrying Value Bonds On Deposit With Various State And Regulatory Agencies CarryingValueBondsOnDepositWithVariousStateAndRegulatoryAgencies	27100000	USD
	sigi	Changes In Net Unrealized Gain Loss Related To Held To Maturity Securities ChangesInNetUnrealizedGainLossRelatedToHeldToMaturitySecurities	-892000	USD
	sigi	Changes In Other Comprehensive Income Loss Relatedot Investments ChangesInOtherComprehensiveIncomeLossRelatedotInvestments	-65088000	USD
	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	10054000	USD
	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	47436000	USD
CY2012Q2	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	7799000	USD
CY2013Q2	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	-60173000	USD
CY2012Q2	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	1991000	USD
CY2013Q2	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	-24652000	USD
CY2013Q2	sigi	Estimated Receivable Related To Sale Of Subsidiary EstimatedReceivableRelatedToSaleOfSubsidiary	1000000	USD
	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	11000000	USD
	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	6300000	USD
CY2013Q2	sigi	Held To Maturity Securities Amortized Cost HeldToMaturitySecuritiesAmortizedCost	476894000	USD
CY2012Q4	sigi	Held To Maturity Securities Amortized Cost HeldToMaturitySecuritiesAmortizedCost	550143000	USD
	sigi	Held To Maturity Securities Average Duration HeldToMaturitySecuritiesAverageDuration	P2Y3M18D
CY2013Q2	sigi	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	3000	USD
CY2012Q4	sigi	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	33000	USD
CY2013Q2	sigi	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	737000	USD
CY2012Q4	sigi	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	887000	USD
CY2013Q2	sigi	Held To Maturity Securities Gross Unrecognized Holding Gains HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	28152000	USD
CY2012Q4	sigi	Held To Maturity Securities Gross Unrecognized Holding Gains HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	40615000	USD
CY2013Q2	sigi	Held To Maturity Securities Gross Unrecognized Holding Losses HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	-34000	USD
CY2012Q4	sigi	Held To Maturity Securities Gross Unrecognized Holding Losses HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	-23000	USD
CY2013Q2	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	-2613000	USD
CY2012Q4	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	-3926000	USD
	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
CY2012Q2	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	2000	USD
	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	155000	USD
CY2013Q2	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
CY2012Q2	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	25000	USD
CY2013Q2	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	12000	USD
	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	49000	USD
	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	106000	USD
CY2013Q2	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	-3000	USD
CY2012Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	-29000	USD
CY2013Q2	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Months Or Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsOrLonger	-667000	USD
CY2012Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Months Or Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsOrLonger	-791000	USD
	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	15104000	USD
	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	4118000	USD
CY2012Q2	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	-980000	USD
CY2013Q2	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	9079000	USD
	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	63534000	USD
	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	22499000	USD
CY2012Q2	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	-692000	USD
CY2013Q2	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	36201000	USD
	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	19802000	USD
	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	69790000	USD
	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	75172000	USD
	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	65225000	USD
CY2013Q2	sigi	Maximum Employer Match Of Employee Contribution Of Defined Compensation To Retirement Savings Plan Percentage MaximumEmployerMatchOfEmployeeContributionOfDefinedCompensationToRetirementSavingsPlanPercentage	0.04
	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	66634000	USD
CY2012Q2	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	34006000	USD
	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	66873000	USD
CY2013Q2	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	34003000	USD
	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	76000	USD
	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	27000	USD
	sigi	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostTax	-5000	USD
	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Before Reclassifications NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeBeforeReclassifications	50000	USD
	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	-77000	USD
	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	-218000	USD
CY2012Q2	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	-54000	USD
CY2013Q2	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	-47000	USD
CY2012Q4	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Loss Position More Than Twelve Months NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeLossPositionMoreThanTwelveMonths	900000	USD
	sigi	Non Credit Portion Of Other Than Temporary Impairments Recognized In Other Comprehensive Income NonCreditPortionOfOtherThanTemporaryImpairmentsRecognizedInOtherComprehensiveIncome	50000	USD
CY2013Q2	sigi	Non Credit Portion Of Other Than Temporary Impairments Recognized In Other Comprehensive Income NonCreditPortionOfOtherThanTemporaryImpairmentsRecognizedInOtherComprehensiveIncome	31000	USD
CY2012Q2	sigi	Non Credit Portion Of Other Than Temporary Impairments Recognized In Other Comprehensive Income NonCreditPortionOfOtherThanTemporaryImpairmentsRecognizedInOtherComprehensiveIncome	35000	USD
	sigi	Non Credit Portion Of Other Than Temporary Impairments Recognized In Other Comprehensive Income NonCreditPortionOfOtherThanTemporaryImpairmentsRecognizedInOtherComprehensiveIncome	142000	USD
CY2012Q2	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	19000	USD
CY2013Q2	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	16000	USD
CY2013Q2	sigi	Number Of Fixed Maturity Securities Pledged As Collateral For Borrowings With Federal Home Loan Bank Of Indianapolis NumberOfFixedMaturitySecuritiesPledgedAsCollateralForBorrowingsWithFederalHomeLoanBankOfIndianapolis	32	Securities
CY2013Q2	sigi	Number Of Held To Maturity Securities Transferred Security At Carrying Value NumberOfHeldToMaturitySecuritiesTransferredSecurityAtCarryingValue	10	Securities
	sigi	Number Of Insurance Subsidiaries NumberOfInsuranceSubsidiaries	10	USD
CY2013Q2	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	505	Securities
CY2012Q4	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	101	Securities
	sigi	Other Comprehensive Income Loss Amortization Pension And Other Post Retirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostRetirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostNetOfTax	0	USD
	sigi	Other Comprehensive Income Loss Amortization Pension And Other Post Retirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostRetirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostNetOfTax	-11000	USD
CY2013Q2	sigi	Other Comprehensive Income Loss Amortization Pension And Other Post Retirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostRetirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostNetOfTax	0	USD
CY2012Q2	sigi	Other Comprehensive Income Loss Amortization Pension And Other Post Retirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostRetirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostNetOfTax	0	USD
	sigi	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostBeforeTax	-16000	USD
	sigi	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-28309000	USD
	sigi	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plan Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlanAdjustmentNetOfTax	-30326000	USD
	sigi	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plan Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlanAdjustmentNetOfTax	-1857000	USD
CY2012Q2	sigi	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plan Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlanAdjustmentNetOfTax	-929000	USD
CY2013Q2	sigi	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plan Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlanAdjustmentNetOfTax	-513000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment For Gains Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForGainsIncludedInNetIncomeNetOfTax	-7322000	USD
CY2013Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment For Gains Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForGainsIncludedInNetIncomeNetOfTax	-3438000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment For Gains Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForGainsIncludedInNetIncomeNetOfTax	-2917000	USD
CY2012Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment For Gains Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForGainsIncludedInNetIncomeNetOfTax	-128000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment For Held To Maturity Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForHeldToMaturitySecuritiesNetOfTax	-865000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment For Investments Subtotal Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForInvestmentsSubtotalNetOfTax	-8179000	USD
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Type DocumentType	10-Q
	sigi	Percentage Of Unpaid Nfip Claims Ceded By Federal Government PercentageOfUnpaidNfipClaimsCededByFederalGovernment	1.00
	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	7728000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociNetOfTax	-6453000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociPensionAndOtherPostretirementBenefitPlansNetOfTax	1726000	USD
CY2013Q2	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
CY2012Q2	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	1000	USD
	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	1000	USD
	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
CY2012Q2	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
CY2013Q2	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	-860000	USD
	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax	-11264000	USD
	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax	-4488000	USD
CY2012Q2	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax	-199000	USD
CY2013Q2	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincomebeforetax	-5288000	USD
	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax	3942000	USD
	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax	1571000	USD
CY2012Q2	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax	71000	USD
CY2013Q2	sigi	Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax Othercomprehensiveincomelossreclassificationadjustmentforgainsincludedinnetincometax	1850000	USD
CY2012Q4	sigi	Percentage Decline In Fair Value Percentage PercentageDeclineInFairValuePercentage	0.05
CY2009Q4	sigi	Percentage Of Interest Sold In Subsidiary PercentageOfInterestSoldInSubsidiary	1.00
	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	259177000	USD
CY2012Q2	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	131219000	USD
CY2013Q2	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	143728000	USD
	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	283256000	USD
CY2012Q4	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	1700000	USD
	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	92026000	USD
	dei	Document Period End Date DocumentPeriodEndDate	2013-06-30
	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-100135000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	22081000	USD
CY2012Q2	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	7063000	USD
CY2013Q2	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-97163000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-35047000	USD
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
CY2013Q2	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	43640000	USD
CY2013Q2	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	1000000	USD
CY2012Q2	sigi	Short Term Investments Realized Losses ShortTermInvestmentsRealizedLosses	0	USD
	sigi	Short Term Investments Realized Losses ShortTermInvestmentsRealizedLosses	0	USD
	sigi	Short Term Investments Realized Losses ShortTermInvestmentsRealizedLosses	2000	USD
CY2013Q2	sigi	Short Term Investments Realized Losses ShortTermInvestmentsRealizedLosses	0	USD
CY2013Q2	sigi	Total Investment Revenues TotalInvestmentRevenues	39157000	USD
CY2012Q2	sigi	Total Investment Revenues TotalInvestmentRevenues	34184000	USD
	sigi	Total Investment Revenues TotalInvestmentRevenues	75382000	USD
	sigi	Total Investment Revenues TotalInvestmentRevenues	71170000	USD
CY2012Q2	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	7222000	USD
	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	42845000	USD
CY2012Q2	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	2472000	USD
CY2013Q2	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-34007000	USD
	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	-65088000	USD
	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	14353000	USD
CY2013Q2	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	-63156000	USD
CY2012Q2	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	4591000	USD
CY2013Q2	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	46260000	USD
CY2012Q4	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	2934000	USD
	sigi	Unrealized Unrecognized Losses Period Increase UnrealizedUnrecognizedLossesPeriodIncrease	-43300000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Entity Central Index Key EntityCentralIndexKey	0000230557
CY2013Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	55728510	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	SELECTIVE INSURANCE GROUP INC

Files In Submission

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$SIGI
Selective Insurance Group Inc Stock $sigi

2013 Q2 Form 10-Q Financial Statement

#000023055713000012 Filed on August 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI Selective Insurance Group Inc Stock $sigi

2013 Q2 Form 10-Q Financial Statement

#000023055713000012 Filed on August 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI
Selective Insurance Group Inc Stock $sigi