$SIGI
Selective Insurance Group Inc Stock $sigi

$sigi Overview Financials Valuation SEC Filings Company Website

2014 Q1 Form 10-Q Financial Statement

#000023055714000006 Filed on April 24, 2014

Income Statement

Concept	2014 Q1	2013 Q1
Revenue	$509.1M	$459.9M
YoY Change	10.68%	9.68%
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	$10.60M	$13.10M
YoY Change	-19.08%	1090.91%
% of Gross Profit
Operating Expenses	$478.4M	$425.3M
YoY Change	12.49%	8.63%
Operating Profit
YoY Change
Interest Expense	-$5.600M	-$5.800M
YoY Change	-3.45%	23.4%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$25.08M	$28.87M
YoY Change	-13.11%	24.48%
Income Tax	$7.110M	$6.563M
% Of Pretax Income	28.34%	22.73%
Net Earnings	$17.97M	$21.31M
YoY Change	-15.65%	17.77%
Net Earnings / Revenue	3.53%	4.63%
Basic Earnings Per Share	$0.32	$0.38
Diluted Earnings Per Share	$0.31	$0.38
COMMON SHARES
Basic Shares Outstanding	56.22M shares	55.53M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2014 Q1	2013 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments
Other Short-Term Assets		$134.2M
YoY Change		-2.26%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets		$169.5M
YoY Change		-1.85%
LONG-TERM ASSETS
Property, Plant & Equipment	$53.73M	$48.33M
YoY Change	11.17%	10.08%
Goodwill	$7.849M	$7.849M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$4.640B	$4.422B
YoY Change	4.93%	6.44%
Other Assets	$113.1M	$105.0M
YoY Change	7.71%	-9.79%
Total Long-Term Assets		$6.175B
YoY Change		13.15%
TOTAL ASSETS
Total Short-Term Assets		$169.5M
Total Long-Term Assets		$6.175B
Total Assets	$6.370B	$6.344B
YoY Change	0.41%	12.69%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$89.60M	$103.9M
YoY Change	-13.76%	-8.78%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$92.80M	$107.0M
YoY Change	-13.27%	-10.46%
LONG-TERM LIABILITIES
Long-Term Debt	$392.4M	$392.4M
YoY Change	0.0%	27.65%
Other Long-Term Liabilities	$189.0M	$228.5M
YoY Change	-17.29%	56.4%
Total Long-Term Liabilities	$581.4M	$620.9M
YoY Change	-6.36%	36.91%
TOTAL LIABILITIES
Total Short-Term Liabilities	$92.80M	$107.0M
Total Long-Term Liabilities	$581.4M	$620.9M
Total Liabilities	$5.185B	$5.208B
YoY Change	-0.44%	14.54%
SHAREHOLDERS EQUITY
Retained Earnings	$1.213B	$1.139B
YoY Change	6.45%
Common Stock	$493.4M	$474.1M
YoY Change	4.07%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$562.0M	$558.8M
YoY Change	0.57%
Treasury Stock Shares	43.32M shares	43.18M shares
Shareholders Equity	$1.186B	$1.136B
YoY Change
Total Liabilities & Shareholders Equity	$6.370B	$6.344B
YoY Change	0.41%	12.69%

Cashflow Statement

Concept	2014 Q1	2013 Q1
OPERATING ACTIVITIES
Net Income	$17.97M	$21.31M
YoY Change	-15.65%	17.77%
Depreciation, Depletion And Amortization	$10.60M	$13.10M
YoY Change	-19.08%	1090.91%
Cash From Operating Activities	$35.80M	$28.14M
YoY Change	27.22%	-21.52%
INVESTING ACTIVITIES
Capital Expenditures	-$5.700M	-$3.700M
YoY Change	54.05%	60.87%
Acquisitions		$0.00
YoY Change		-100.0%
Other Investing Activities	-$22.00M	-$95.40M
YoY Change	-76.94%	266.92%
Cash From Investing Activities	-$27.70M	-$99.11M
YoY Change	-72.05%	250.63%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$2.653M	$3.176M
YoY Change	-16.47%	5.34%
Debt Paid & Issued, Net	$0.00	$100.0M
YoY Change	-100.0%
Cash From Financing Activities	-8.000M	$71.06M
YoY Change	-111.26%	-978.45%
NET CHANGE
Cash From Operating Activities	35.80M	$28.14M
Cash From Investing Activities	-27.70M	-$99.11M
Cash From Financing Activities	-8.000M	$71.06M
Net Change In Cash	100.0K	$86.00K
YoY Change	16.28%	-117.17%
FREE CASH FLOW
Cash From Operating Activities	$35.80M	$28.14M
Capital Expenditures	-$5.700M	-$3.700M
Free Cash Flow	$41.50M	$31.84M
YoY Change	30.34%	-16.55%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2014Q1	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	3249000	USD
CY2013Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	0	USD
CY2014Q1	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	36967000	USD
CY2013Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	37382000	USD
CY2014Q1	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	89558000	USD
CY2013Q4	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	111427000	USD
CY2014Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	181959000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	179192000	USD
CY2014Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	41529000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	24851000	USD
CY2013Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	288182000	USD
CY2014Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	294365000	USD
CY2014Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	17790000	USD
CY2013Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	6832000	USD
CY2014Q1	us-gaap	Assets Assets	6370236000	USD
CY2013Q4	us-gaap	Assets Assets	6270170000	USD
CY2013Q1	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	12463000	USD
CY2014Q1	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10185000	USD
CY2014Q1	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	7850000	USD
CY2013Q1	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	8482000	USD
CY2014Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3748456000	USD
CY2013Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3675977000	USD
CY2014Q1	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	162370000	USD
CY2013Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	155350000	USD
CY2014Q1	us-gaap	Available For Sale Securities AvailableForSaleSecurities	4013540000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	3908307000	USD
CY2014Q1	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3910826000	USD
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3831327000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1411803000	USD
CY2014Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1171643000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	40731000	USD
CY2014Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	53076000	USD
CY2014Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1345666000	USD
CY2014Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1991515000	USD
CY2014Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	52928000	USD
CY2014Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	425744000	USD
CY2014Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3815853000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3715536000	USD
CY2014Q1	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	197687000	USD
CY2013Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	192771000	USD
CY2014Q1	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;"> </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 2014 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;"><br clear="none"/></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;">first</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;">March 31, 2014</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">First Quarter 2014</font><font style="font-family:inherit;font-size:10pt;">”) and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">March 31, 2013</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">First Quarter 2013</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 annual 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, 2013</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2013 Annual Report</font><font style="font-family:inherit;font-size:10pt;">”) filed with the SEC.</font></div></div>
CY2014Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	483987000	USD
CY2013Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	431081000	USD
CY2014Q1	us-gaap	Cash Cash	245000	USD
CY2013Q4	us-gaap	Cash Cash	193000	USD
CY2012Q4	us-gaap	Cash Cash	210000	USD
CY2013Q1	us-gaap	Cash Cash	296000	USD
CY2013Q1	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	86000	USD
CY2014Q1	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	52000	USD
CY2014Q1	us-gaap	Ceded Premiums Earned CededPremiumsEarned	90390000	USD
CY2013Q1	us-gaap	Ceded Premiums Earned CededPremiumsEarned	85589000	USD
CY2013Q1	us-gaap	Ceded Premiums Written CededPremiumsWritten	87174000	USD
CY2014Q1	us-gaap	Ceded Premiums Written CededPremiumsWritten	88991000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2013Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2014Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2014Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2014Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99536697	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99120235	shares
CY2014Q1	us-gaap	Common Stock Value CommonStockValue	199073000	USD
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	198240000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	49189000	USD
CY2014Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34652000	USD
CY2014Q1	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6538000	USD
CY2013Q1	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7453000	USD
CY2013Q1	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-890000	USD
CY2014Q1	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	572000	USD
CY2014Q1	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	177678000	USD
CY2013Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	172981000	USD
CY2014Q1	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	4697000	USD
CY2013Q1	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	2963000	USD
CY2014Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	113061000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	122613000	USD
CY2013Q1	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	-16000	USD
CY2014Q1	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	0	USD
CY2013Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	13148000	USD
CY2014Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	10578000	USD
CY2013Q1	us-gaap	Direct Premiums Earned DirectPremiumsEarned	494066000	USD
CY2014Q1	us-gaap	Direct Premiums Earned DirectPremiumsEarned	536700000	USD
CY2014Q1	us-gaap	Direct Premiums Written DirectPremiumsWritten	557891000	USD
CY2013Q1	us-gaap	Direct Premiums Written DirectPremiumsWritten	528816000	USD
CY2014Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2013Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-997000	USD
CY2014Q1	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	-538000	USD
CY2014Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2014Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2014Q1	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	770000	USD
CY2013Q1	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1271000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	1195000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-4089000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	0	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	0	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	4660000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	37611000	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	42277000	USD
CY2013Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	2900000	USD
CY2014Q1	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	61800000	USD
CY2014Q1	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	58000000	USD
CY2014Q1	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	8000000	USD
CY2013Q1	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2013Q1	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	5304000	USD
CY2014Q1	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	8181000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	7849000	USD
CY2014Q1	us-gaap	Goodwill Goodwill	7849000	USD
CY2014Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	382056000	USD
CY2013Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	392879000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	65000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	0	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2931000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2940000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	35159000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	31111000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	287045000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	270608000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	81332000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	80337000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	416981000	USD
CY2014Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	403536000	USD
CY2014Q1	us-gaap	Impairment Of Investments ImpairmentOfInvestments	963000	USD
CY2013Q1	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1919000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	22305000	USD
CY2014Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	17974000	USD
CY2014Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25084000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	28868000	USD
CY2014Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.32
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.40
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.40
CY2014Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.31
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2014Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2014Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2014Q1	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	33000	USD
CY2013Q1	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-426000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6563000	USD
CY2014Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7110000	USD
CY2014Q1	us-gaap	Income Tax Receivable IncomeTaxReceivable	0	USD
CY2013Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	512000	USD
CY2013Q1	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4528000	USD
CY2014Q1	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-21869000	USD
CY2013Q1	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	5290000	USD
CY2014Q1	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	4332000	USD
CY2014Q1	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-414000	USD
CY2013Q1	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-384000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	26357000	USD
CY2014Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-17293000	USD
CY2013Q1	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	36202000	USD
CY2014Q1	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	29042000	USD
CY2013Q1	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-12378000	USD
CY2014Q1	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-26957000	USD
CY2013Q1	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	269849000	USD
CY2014Q1	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	320546000	USD
CY2013Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	5831000	USD
CY2014Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	5561000	USD
CY2014Q1	us-gaap	Interest Paid InterestPaid	2973000	USD
CY2013Q1	us-gaap	Interest Paid InterestPaid	1964000	USD
CY2014Q1	us-gaap	Investments Investments	4640049000	USD
CY2013Q4	us-gaap	Investments Investments	4583312000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	5116242000	USD
CY2014Q1	us-gaap	Liabilities Liabilities	5184705000	USD
CY2014Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6370236000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6270170000	USD
CY2014Q1	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3432432000	USD
CY2013Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3349770000	USD
CY2014Q1	us-gaap	Long Term Debt LongTermDebt	392420000	USD
CY2013Q4	us-gaap	Long Term Debt LongTermDebt	392414000	USD
CY2014Q1	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 ("NFIPs") 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 sells Commercial Lines property and casualty insurance products and services to insureds who have not obtained coverage in the standard market; 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, which invests the premiums collected by our Standard and E&S Insurance Operations and amounts generated through our capital management strategies, which may include the issuance of debt and equity securities.</font></div></td></tr></table></div>
CY2014Q1	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-8029000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	71058000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-99112000	USD
CY2014Q1	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-27683000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	28140000	USD
CY2014Q1	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	35764000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	21308000	USD
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	17974000	USD
CY2014Q1	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3
CY2014Q1	us-gaap	Other Assets OtherAssets	70526000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	6000	USD
CY2013Q4	us-gaap	Other Assets OtherAssets	75727000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	10000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	4000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-380000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-45866000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-29813000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-247000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-133000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-16053000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	7229000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	5976000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	3884000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	4699000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	2530000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	2092000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-380000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1840000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-247000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-1196000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-133000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-644000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	32964000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	3684000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	21426000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2394000	USD
CY2014Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	11538000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1290000	USD
CY2014Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8614000	USD
CY2013Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	15873000	USD
CY2014Q1	us-gaap	Other General Expense OtherGeneralExpense	7092000	USD
CY2013Q1	us-gaap	Other General Expense OtherGeneralExpense	13687000	USD
CY2013Q1	us-gaap	Other Income OtherIncome	2784000	USD
CY2014Q1	us-gaap	Other Income OtherIncome	9824000	USD
CY2014Q1	us-gaap	Other Investments OtherInvestments	106720000	USD
CY2013Q4	us-gaap	Other Investments OtherInvestments	107875000	USD
CY2013Q4	us-gaap	Other Liabilities OtherLiabilities	203476000	USD
CY2014Q1	us-gaap	Other Liabilities OtherLiabilities	189034000	USD
CY2013Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	174251000	USD
CY2014Q1	us-gaap	Other Short Term Investments OtherShortTermInvestments	137733000	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	9000	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7486000	USD
CY2013Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2014Q1	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
CY2014Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	30000	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	963000	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	1949000	USD
CY2013Q1	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	3673000	USD
CY2014Q1	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	5699000	USD
CY2013Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3176000	USD
CY2014Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2653000	USD
CY2013Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6824000	USD
CY2014Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6948000	USD
CY2013Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	308289000	USD
CY2014Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	182809000	USD
CY2014Q1	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	61360000	USD
CY2013Q1	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	2000	USD
CY2013Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2329000	USD
CY2014Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4615000	USD
CY2014Q1	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	398348000	USD
CY2013Q1	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	644274000	USD
CY2014Q1	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	358349000	USD
CY2013Q1	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	365646000	USD
CY2013Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2014Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2013Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2014Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2014Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2013Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2013Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2014Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2014Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q1	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	420940000	USD
CY2014Q1	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	456495000	USD
CY2013Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	4442000	USD
CY2014Q1	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	3771000	USD
CY2013Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	524870000	USD
CY2014Q1	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	553912000	USD
CY2013Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	450124000	USD
CY2014Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	476750000	USD
CY2014Q1	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	141603000	USD
CY2013Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	143000000	USD
CY2014Q1	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	8000000	USD
CY2013Q1	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2013Q1	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	225000	USD
CY2014Q1	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
CY2014Q1	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	5704000	USD
CY2013Q1	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	3447000	USD
CY2014Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2013Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	178623000	USD
CY2014Q1	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1261000	USD
CY2013Q1	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1164000	USD
CY2013Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	124975000	USD
CY2014Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	104358000	USD
CY2013Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	28644000	USD
CY2014Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	9396000	USD
CY2014Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	62800000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	6900000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	6851000	USD
CY2014Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1302000	USD
CY2014Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	61523000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	0	USD
CY2014Q1	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	434865000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	695313000	USD
CY2014Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	53725000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	50834000	USD
CY2014Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	7218000	USD
CY2013Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	3355000	USD
CY2013Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	9074000	USD
CY2014Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	7479000	USD
CY2014Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	45282000	USD
CY2013Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	104871000	USD
CY2013Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	100000000	USD
CY2014Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1202015000	USD
CY2014Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1212577000	USD
CY2013Q1	us-gaap	Revenues Revenues	459949000	USD
CY2014Q1	us-gaap	Revenues Revenues	509071000	USD
CY2013Q1	us-gaap	Share Based Compensation ShareBasedCompensation	3692000	USD
CY2014Q1	us-gaap	Share Based Compensation ShareBasedCompensation	4176000	USD
CY2014Q1	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	15283	shares
CY2013Q1	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	17314	shares
CY2013Q1	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	496647	shares
CY2014Q1	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	401179	shares
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1153928000	USD
CY2014Q1	us-gaap	Stockholders Equity StockholdersEquity	1185531000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	1136345000	USD
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	43198622	shares
CY2014Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	43317498	shares
CY2013Q1	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	146436	shares
CY2014Q1	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	118876	shares
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	559360000	USD
CY2014Q1	us-gaap	Treasury Stock Value TreasuryStockValue	562013000	USD
CY2013Q4	us-gaap	Unearned Premiums UnearnedPremiums	1059155000	USD
CY2014Q1	us-gaap	Unearned Premiums UnearnedPremiums	1078012000	USD
CY2014Q1	sigi	Afs Securities Gross Unrealized Gain AFSSecuritiesGrossUnrealizedGain	134079000	USD
CY2013Q4	sigi	Afs Securities Gross Unrealized Gain AFSSecuritiesGrossUnrealizedGain	128951000	USD
CY2014Q1	sigi	Afs Securities Gross Unrealized Losses AFSSecuritiesGrossUnrealizedLosses	-31365000	USD
CY2013Q4	sigi	Afs Securities Gross Unrealized Losses AFSSecuritiesGrossUnrealizedLosses	-51971000	USD
CY2013Q4	sigi	Afs Unrealized Losses12 Months Or Longer AFSUnrealizedLosses12MonthsOrLonger	-2865000	USD
CY2014Q1	sigi	Afs Unrealized Losses12 Months Or Longer AFSUnrealizedLosses12MonthsOrLonger	-2633000	USD
CY2013Q4	sigi	Afs Unrealized Losses Less Than12 Month AFSUnrealizedLossesLessThan12Month	-49106000	USD
CY2014Q1	sigi	Afs Unrealized Losses Less Than12 Month AFSUnrealizedLossesLessThan12Month	-28732000	USD
CY2014Q1	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2013Q1	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2014Q1	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	456000	USD
CY2013Q1	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	717000	USD
CY2014Q1	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	160000	USD
CY2013Q1	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	251000	USD
CY2013Q1	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	466000	USD
CY2014Q1	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	296000	USD
CY2013Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	-49111000	USD
CY2014Q1	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	-28732000	USD
CY2013Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-3540000	USD
CY2014Q1	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-3273000	USD
CY2013Q4	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1411868000	USD
CY2014Q1	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1171643000	USD
CY2013Q4	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	43662000	USD
CY2014Q1	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	56016000	USD
CY2014Q1	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	2000000	USD
CY2014Q1	sigi	Carrying Value Bonds On Deposit With Various Stateand Regulatory Agencies CarryingValueBondsOnDepositWithVariousStateandRegulatoryAgencies	26200000	USD
CY2014Q1	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	50743000	USD
CY2013Q1	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	70227000	USD
CY2014Q1	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	16091000	USD
CY2013Q1	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	21038000	USD
CY2013Q1	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	0	USD
CY2014Q1	sigi	Gross Premiums Writtenof Self Insured Pooled Group Book Of Business Sold GrossPremiumsWrittenofSelfInsuredPooledGroupBookOfBusinessSold	38000000	USD
CY2014Q1	sigi	Held To Maturity Securities Amortized Cost HeldToMaturitySecuritiesAmortizedCost	380255000	USD
CY2013Q4	sigi	Held To Maturity Securities Amortized Cost HeldToMaturitySecuritiesAmortizedCost	390622000	USD
CY2014Q1	sigi	Held To Maturity Securities Average Duration HeldToMaturitySecuritiesAverageDuration	P2Y2M
CY2014Q1	sigi	Held To Maturity Securities Gross Unrecognized Holding Gains HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	21480000	USD
CY2013Q4	sigi	Held To Maturity Securities Gross Unrecognized Holding Gains HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	24102000	USD
CY2014Q1	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	1801000	USD
CY2013Q4	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	2257000	USD
CY2013Q1	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	0	USD
CY2014Q1	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	0	USD
CY2014Q1	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	11000	USD
CY2013Q1	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	37000	USD
CY2013Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	5000	USD
CY2014Q1	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	0	USD
CY2013Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Monthsor Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsorLonger	635000	USD
CY2014Q1	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Monthsor Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsorLonger	610000	USD
CY2013Q4	sigi	Held To Maturity Securitiescontinuous Unrealized Loss Positiontwelve Months Or Longer Aggregate Losses HeldToMaturitySecuritiescontinuousUnrealizedLossPositiontwelveMonthsOrLongerAggregateLosses	-675000	USD
CY2014Q1	sigi	Held To Maturity Securitiescontinuous Unrealized Loss Positiontwelve Months Or Longer Aggregate Losses HeldToMaturitySecuritiescontinuousUnrealizedLossPositiontwelveMonthsOrLongerAggregateLosses	-640000	USD
CY2013Q4	sigi	Heldto Maturity Securitiescontinuous Unrealized Loss Position Lessthan Twelve Months Aggregate Losses HeldtoMaturitySecuritiescontinuousUnrealizedLossPositionLessthanTwelveMonthsAggregateLosses	-5000	USD
CY2014Q1	sigi	Heldto Maturity Securitiescontinuous Unrealized Loss Position Lessthan Twelve Months Aggregate Losses HeldtoMaturitySecuritiescontinuousUnrealizedLossPositionLessthanTwelveMonthsAggregateLosses	0	USD
CY2014Q1	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	7110000	USD
CY2013Q1	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	6025000	USD
CY2014Q1	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	25084000	USD
CY2013Q1	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	27333000	USD
CY2014Q1	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	58938000	USD
CY2013Q1	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	38556000	USD
CY2014Q1	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	19875000	USD
CY2013Q1	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	30106000	USD
CY2014Q1	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	35534000	USD
CY2013Q1	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	32870000	USD
CY2013Q1	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	30000	USD
CY2013Q1	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	10000	USD
CY2014Q1	sigi	Non Credit Portionof Other Than Temporary Impairments Recognizedin Other Comprehensive Income NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome	0	USD
CY2013Q1	sigi	Non Credit Portionof Other Than Temporary Impairments Recognizedin Other Comprehensive Income NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome	20000	USD
CY2014Q1	sigi	Number Of Insurance Subsidiaries NumberOfInsuranceSubsidiaries	10
CY2014Q1	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	466	Securities
CY2013Q4	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	557	Securities
CY2014Q1	sigi	Other Comprehensive Income Loss Amortization Pension And Other Post Retirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Netof Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostRetirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostNetofTax	0	USD
CY2013Q1	sigi	Other Comprehensive Income Loss Amortization Pension And Other Post Retirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Netof Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostRetirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostNetofTax	11000	USD
CY2013Q1	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
CY2013Q1	sigi	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostTax	-5000	USD
CY2013Q1	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
CY2014Q1	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
CY2013Q1	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	860000	USD
CY2014Q1	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
CY2014Q1	sigi	Percentage Of Unpaid Nfip Claims Ceded By Federal Government PercentageOfUnpaidNfipClaimsCededByFederalGovernment	1.00
CY2014Q1	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	149266000	USD
CY2013Q1	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	139528000	USD
CY2014Q1	sigi	Reinsurance Recoverables Net ReinsuranceRecoverablesNet	574621000	USD
CY2013Q4	sigi	Reinsurance Recoverables Net ReinsuranceRecoverablesNet	550897000	USD
CY2013Q1	sigi	Repayments Capital Lease Obligations RepaymentsCapitalLeaseObligations	0	USD
CY2014Q1	sigi	Repayments Capital Lease Obligations RepaymentsCapitalLeaseObligations	459000	USD
CY2013Q4	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	2900000	USD
CY2014Q1	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	2700000	USD
CY2014Q1	sigi	Segment Reporting Revenue SegmentReportingRevenue	509066000	USD
CY2013Q1	sigi	Segment Reporting Revenue SegmentReportingRevenue	459885000	USD
CY2013Q1	sigi	Taxfree Exchange Of Fixed Maturity Security Afs TaxfreeExchangeOfFixedMaturitySecurityAFS	8470000	USD
CY2014Q1	sigi	Taxfree Exchange Of Fixed Maturity Security Afs TaxfreeExchangeOfFixedMaturitySecurityAFS	0	USD
CY2014Q1	sigi	Taxfree Exchange Of Fixed Maturity Security Htm TaxfreeExchangeOfFixedMaturitySecurityHTM	15000	USD
CY2013Q1	sigi	Taxfree Exchange Of Fixed Maturity Security Htm TaxfreeExchangeOfFixedMaturitySecurityHTM	7168000	USD
CY2014Q1	sigi	Taxoninvestmentincome Taxoninvestmentincome	11575000	USD
CY2013Q1	sigi	Taxoninvestmentincome Taxoninvestmentincome	9205000	USD
CY2013Q1	sigi	Total Investment Revenues TotalInvestmentRevenues	36225000	USD
CY2014Q1	sigi	Total Investment Revenues TotalInvestmentRevenues	42752000	USD
CY2013Q1	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	48386000	USD
CY2014Q1	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	37737000	USD
CY2014Q1	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	25279000	USD
CY2013Q1	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-2972000	USD
CY2014Q1	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	8848000	USD
CY2013Q1	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-1040000	USD
CY2014Q1	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	-16431000	USD
CY2013Q1	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	1932000	USD
CY2014Q1	sigi	Totalinvestmentincomeafterfederalincometax Totalinvestmentincomeafterfederalincometax	31177000	USD
CY2013Q1	sigi	Totalinvestmentincomeafterfederalincometax Totalinvestmentincomeafterfederalincometax	27020000	USD
CY2014Q1	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	31395000	USD
CY2013Q4	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	52011000	USD
CY2014Q1	sigi	Unrealized Unrecognized Losses Period Increase Decrease UnrealizedUnrecognizedLossesPeriodIncreaseDecrease	20600000	USD
CY2014Q1	sigi	Unrecoginzed Holding Losses UnrecoginzedHoldingLosses	0	USD
CY2013Q4	sigi	Unrecoginzed Holding Losses UnrecoginzedHoldingLosses	0	USD
CY2014Q1	dei	Amendment Flag AmendmentFlag	false
CY2014Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2014Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2014Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2014Q1	dei	Document Period End Date DocumentPeriodEndDate	2014-03-31
CY2014Q1	dei	Document Type DocumentType	10-Q
CY2014Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000230557
CY2014Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	56219199	shares
CY2014Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2014Q1	dei	Entity Registrant Name EntityRegistrantName	SELECTIVE INSURANCE GROUP INC

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$SIGI
Selective Insurance Group Inc Stock $sigi

2014 Q1 Form 10-Q Financial Statement

#000023055714000006 Filed on April 24, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI Selective Insurance Group Inc Stock $sigi

2014 Q1 Form 10-Q Financial Statement

#000023055714000006 Filed on April 24, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI
Selective Insurance Group Inc Stock $sigi