$SIGI
Selective Insurance Group Inc Stock $sigi

$sigi Overview Financials Valuation SEC Filings Company Website

2014 Q3 Form 10-Q Financial Statement

#000023055714000012 Filed on October 30, 2014

Income Statement

Concept	2014 Q3	2013 Q3
Revenue	$515.4M	$486.8M
YoY Change	5.86%	11.43%
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	$12.20M	$9.800M
YoY Change	24.49%	0.0%
% of Gross Profit
Operating Expenses	$434.5M	$436.7M
YoY Change	-0.5%	6.02%
Operating Profit
YoY Change
Interest Expense	-$5.600M	-$5.600M
YoY Change	0.0%	19.15%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$75.33M	$44.49M
YoY Change	69.33%	118.99%
Income Tax	$22.16M	$11.83M
% Of Pretax Income	29.42%	26.6%
Net Earnings	$53.16M	$32.65M
YoY Change	62.81%	78.69%
Net Earnings / Revenue	10.32%	6.71%
Basic Earnings Per Share	$0.94	$0.59
Diluted Earnings Per Share	$0.93	$0.57
COMMON SHARES
Basic Shares Outstanding	56.42M shares	55.77M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2014 Q3	2013 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets		$36.00M
YoY Change		-79.35%
LONG-TERM ASSETS
Property, Plant & Equipment	$55.53M	$50.02M
YoY Change	11.02%	8.81%
Goodwill	$7.849M	$7.849M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$4.803B	$4.516B
YoY Change	6.36%	4.22%
Other Assets	$92.80M	$131.6M
YoY Change	-29.48%	43.2%
Total Long-Term Assets		$6.230B
YoY Change		9.2%
TOTAL ASSETS
Total Short-Term Assets		$36.00M
Total Long-Term Assets		$6.230B
Total Assets	$6.577B	$6.266B
YoY Change	4.96%	6.57%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$97.50M	$116.7M
YoY Change	-16.45%	-6.42%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$113.8M	$116.7M
YoY Change	-2.49%	-6.42%
LONG-TERM LIABILITIES
Long-Term Debt	$392.3M	$392.4M
YoY Change	-0.03%	27.65%
Other Long-Term Liabilities	$214.7M	$205.2M
YoY Change	4.63%	0.93%
Total Long-Term Liabilities	$607.0M	$597.6M
YoY Change	1.57%	17.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$113.8M	$116.7M
Total Long-Term Liabilities	$607.0M	$597.6M
Total Liabilities	$5.310B	$5.142B
YoY Change	3.27%	8.13%
SHAREHOLDERS EQUITY
Retained Earnings	$1.280B	$1.184B
YoY Change	8.11%	4.68%
Common Stock	$499.9M	$482.0M
YoY Change	3.72%	3.97%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$562.3M	$558.9M
YoY Change	0.6%	0.65%
Treasury Stock Shares	43.33M shares	43.18M shares
Shareholders Equity	$1.267B	$1.124B
YoY Change
Total Liabilities & Shareholders Equity	$6.577B	$6.266B
YoY Change	4.96%	6.57%

Cashflow Statement

Concept	2014 Q3	2013 Q3
OPERATING ACTIVITIES
Net Income	$53.16M	$32.65M
YoY Change	62.81%	78.69%
Depreciation, Depletion And Amortization	$12.20M	$9.800M
YoY Change	24.49%	0.0%
Cash From Operating Activities	$85.40M	$140.1M
YoY Change	-39.04%	21.19%
INVESTING ACTIVITIES
Capital Expenditures	-$2.600M	-$3.700M
YoY Change	-29.73%	42.31%
Acquisitions
YoY Change
Other Investing Activities	-$74.40M	-$129.3M
YoY Change	-42.46%	21.41%
Cash From Investing Activities	-$77.00M	-$132.9M
YoY Change	-42.06%	21.93%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-7.500M	-7.100M
YoY Change	5.63%	9.23%
NET CHANGE
Cash From Operating Activities	85.40M	140.1M
Cash From Investing Activities	-77.00M	-132.9M
Cash From Financing Activities	-7.500M	-7.100M
Net Change In Cash	900.0K	100.0K
YoY Change	800.0%	0.0%
FREE CASH FLOW
Cash From Operating Activities	$85.40M	$140.1M
Capital Expenditures	-$2.600M	-$3.700M
Free Cash Flow	$88.00M	$143.8M
YoY Change	-38.8%	21.66%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q4	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	111427000	USD
CY2014Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	188175000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	179192000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	49125000	USD
CY2013Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	0	USD
CY2014Q3	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	16322000	USD
CY2014Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	37563000	USD
CY2013Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	37382000	USD
CY2014Q3	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	97469000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	24851000	USD
CY2014Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	300425000	USD
CY2013Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	288182000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	57642000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	156906000	USD
CY2013Q4	us-gaap	Assets Assets	6270170000	USD
CY2014Q3	us-gaap	Assets Assets	6577419000	USD
CY2014Q3	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	25600000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	27359000	USD
CY2014Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	6789000	USD
CY2013Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	11066000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	32480000	USD
CY2013Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	22053000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	19467000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	34913000	USD
CY2014Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	5780000	USD
CY2014Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3884252000	USD
CY2013Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3675977000	USD
CY2014Q3	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	180419000	USD
CY2013Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	155350000	USD
CY2014Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	4178904000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	3908307000	USD
CY2014Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	-133475000	USD
CY2013Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	-128951000	USD
CY2014Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	-19242000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7433000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxPortionAttributableToParent	-27000	USD
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.79
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.45
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3831327000	USD
CY2013Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	-51971000	USD
CY2014Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	4064671000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2865000	USD
CY2014Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	13141000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	49106000	USD
CY2014Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	6101000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1411803000	USD
CY2014Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	532683000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	40731000	USD
CY2014Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	505310000	USD
CY2014Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1507315000	USD
CY2014Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1915327000	USD
CY2014Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	109943000	USD
CY2014Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	435053000	USD
CY2014Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3967638000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3715536000	USD
CY2013Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	192771000	USD
CY2014Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	211266000	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 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;">third</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;">September 30, 2014</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Third 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;">September 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;">Third Quarter 2013</font><font style="font-family:inherit;font-size:10pt;">”) and the </font><font style="font-family:inherit;font-size:10pt;">nine</font><font style="font-family:inherit;font-size:10pt;">-month periods ended </font><font style="font-family:inherit;font-size:10pt;">September 30, 2014</font><font style="font-family:inherit;font-size:10pt;"> ("</font><font style="font-family:inherit;font-size:10pt;">Nine Months 2014</font><font style="font-family:inherit;font-size:10pt;">") and </font><font style="font-family:inherit;font-size:10pt;">September 30, 2013</font><font style="font-family:inherit;font-size:10pt;"> ("</font><font style="font-family:inherit;font-size:10pt;">Nine Months 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>
CY2014Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	440032000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1391347000	USD
CY2013Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	442328000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1306153000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4853000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	2290000	USD
CY2013Q4	us-gaap	Cash Cash	193000	USD
CY2014Q3	us-gaap	Cash Cash	2501000	USD
CY2013Q3	us-gaap	Cash Cash	177000	USD
CY2012Q4	us-gaap	Cash Cash	210000	USD
	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	-33000	USD
	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	2308000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	264174000	USD
CY2014Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	92884000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	274947000	USD
CY2013Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	91805000	USD
CY2014Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	103517000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	290836000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	280719000	USD
CY2013Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	100154000	USD
CY2014Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.39
CY2014Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2013Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.39
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2014Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2014Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2014Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99753415	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99120235	shares
CY2014Q3	us-gaap	Common Stock Value CommonStockValue	199507000	USD
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	198240000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	124751000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	44126000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	30458000	USD
CY2014Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34275000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	22692000	USD
CY2013Q3	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6367000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20041000	USD
CY2014Q3	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7373000	USD
CY2013Q3	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5465000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	16762000	USD
CY2014Q3	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	14791000	USD
CY2014Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	189681000	USD
CY2013Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	172981000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	16700000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	21688000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	122613000	USD
CY2014Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	92780000	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	31059000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	32861000	USD
CY2013Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	518307000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1516454000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1630347000	USD
CY2014Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	548734000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	1650855000	USD
CY2014Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	592858000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	1723063000	USD
CY2013Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	570849000	USD
CY2014Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2013Q3	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 Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-997000	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	-538000	USD
CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.46
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.79
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.75
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.43
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1024000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1479000	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
CY2013Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	2900000	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	42277000	USD
CY2014Q3	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	61600000	USD
CY2014Q3	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	58000000	USD
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	8000000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	28370000	USD
CY2013Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	14111000	USD
CY2014Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	15231000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	25124000	USD
CY2014Q3	us-gaap	Goodwill Goodwill	7849000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	7849000	USD
CY2013Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	392879000	USD
CY2014Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	336082000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	-24102000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	-18109000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2014Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	-1000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	390622000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	334875000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	675000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	530000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	5000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	9000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	65000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	460000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2931000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2428000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	18366000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	15781000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	235038000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	220937000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	100786000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	99364000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	416981000	USD
CY2014Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	354190000	USD
CY2014Q3	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	3107000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1382000	USD
CY2013Q3	us-gaap	Impairment Of Investments ImpairmentOfInvestments	680000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	82080000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	32653000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	16971000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	130573	shares
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	100477000	USD
CY2014Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	53162000	USD
CY2014Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	75326000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	44485000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	139931000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	109554000	USD
CY2014Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.94
CY2013Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.59
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.48
CY2013Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.57
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.75
CY2014Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.93
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2013Q3	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	0.00
CY2014Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2014Q3	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2013Q3	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	-248000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	131000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39454000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27474000	USD
CY2014Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22164000	USD
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11832000	USD
CY2014Q3	us-gaap	Income Tax Receivable IncomeTaxReceivable	0	USD
CY2013Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	512000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	8286000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-13958000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	8990000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	33596000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	45000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	82000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	13480000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	25036000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	66816000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	84826000	USD
	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-12545000	USD
	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	6895000	USD
CY2013Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	283317000	USD
CY2014Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	270932000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	889273000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	832760000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	16544000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	151555	shares
CY2014Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	5558000	USD
CY2013Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	5570000	USD
	us-gaap	Interest Paid InterestPaid	14089000	USD
	us-gaap	Interest Paid InterestPaid	13325000	USD
CY2014Q3	us-gaap	Investments Investments	4803127000	USD
CY2013Q4	us-gaap	Investments Investments	4583312000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	5116242000	USD
CY2014Q3	us-gaap	Liabilities Liabilities	5310494000	USD
CY2014Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6577419000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6270170000	USD
CY2014Q3	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3445706000	USD
CY2013Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3349770000	USD
CY2013Q4	us-gaap	Long Term Debt LongTermDebt	392414000	USD
CY2014Q3	us-gaap	Long Term Debt LongTermDebt	392294000	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 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>
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	59624000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-21099000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-134712000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-297646000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	237989000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	158119000	USD
	us-gaap	Net Income Loss NetIncomeLoss	100477000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	32653000	USD
	us-gaap	Net Income Loss NetIncomeLoss	81083000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	53162000	USD
CY2014Q3	us-gaap	Net Investment Income NetInvestmentIncome	34292000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	106600000	USD
CY2013Q3	us-gaap	Net Investment Income NetInvestmentIncome	32457000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	99330000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3
CY2013Q4	us-gaap	Other Assets OtherAssets	75727000	USD
CY2014Q3	us-gaap	Other Assets OtherAssets	77865000	USD
CY2013Q3	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
CY2014Q3	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 Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	15400000	USD
	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
CY2013Q3	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
CY2014Q3	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
	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
	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
	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
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	37344000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-56857000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-3377000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-29058000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-18887000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2195000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-36957000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24274000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-1142000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-47445000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-790000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-381000	USD
CY2013Q3	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 Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-30839000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-742000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-247000	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	-400000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-16606000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-277000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-134000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	28672000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	24780000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	13516000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	16435000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	18637000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	10683000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	8785000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	16107000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	10035000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	8673000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	4731000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	5752000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1142000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-3419000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-790000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-381000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-742000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-2222000	USD
CY2014Q3	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
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-513000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-400000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-1197000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-277000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-134000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	13070000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-19900000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1182000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-10171000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	64255000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-77810000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	9820000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-13831000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	41767000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-8988000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-50576000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	6383000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	22488000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-27234000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	3437000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-4843000	USD
CY2014Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	5441000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	22990000	USD
CY2013Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8127000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	27852000	USD
	us-gaap	Other General Expense OtherGeneralExpense	16619000	USD
CY2014Q3	us-gaap	Other General Expense OtherGeneralExpense	3076000	USD
CY2013Q3	us-gaap	Other General Expense OtherGeneralExpense	5984000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2920000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
	us-gaap	Other General Expense OtherGeneralExpense	21540000	USD
CY2013Q3	us-gaap	Other Income OtherIncome	3357000	USD
CY2014Q3	us-gaap	Other Income OtherIncome	3196000	USD
	us-gaap	Other Income OtherIncome	9677000	USD
	us-gaap	Other Income OtherIncome	14931000	USD
CY2014Q3	us-gaap	Other Investments OtherInvestments	106548000	USD
CY2013Q4	us-gaap	Other Investments OtherInvestments	107875000	USD
CY2014Q3	us-gaap	Other Liabilities OtherLiabilities	214724000	USD
CY2013Q4	us-gaap	Other Liabilities OtherLiabilities	203476000	USD
CY2014Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	181593000	USD
CY2013Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	174251000	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	0	USD
CY2014Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	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
CY2014Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2013Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2014Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	5444000	USD
CY2012Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7477000	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	5534000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
	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
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2014Q3	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
CY2014Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2013Q3	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	2044000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2014Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	90000	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
CY2013Q3	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
CY2014Q3	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
	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
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-77000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0	USD
CY2014Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-50000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	9178000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3295000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	680000	USD
CY2014Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	1382000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	3184000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	10493000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20532000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20899000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	560493000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	838634000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	185529000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	112742000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	8498000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	7864000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	1082192000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	1619948000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	995581000	USD
CY2013Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	350648000	USD
CY2014Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	304525000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	1055248000	USD
CY2014Q3	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
CY2013Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2014Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2013Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2014Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2014Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2013Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2014Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q3	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	437568000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	1382759000	USD
CY2014Q3	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	462639000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	1284760000	USD
CY2013Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	4442000	USD
CY2014Q3	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	3860000	USD
CY2013Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	524870000	USD
CY2014Q3	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	591686000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	1405049000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	1451694000	USD
CY2014Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	495121000	USD
CY2013Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	492748000	USD
CY2014Q3	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	158889000	USD
CY2013Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	143000000	USD
	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	8000000	USD
	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2014Q1	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	8000000	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	10546000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	13514000	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	3554000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	4305000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	336939000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	413722000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	87952000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	56375000	USD
CY2013Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	67200000	USD
CY2014Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	89900000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	221500000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	116300000	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 Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	35499000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	186001000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	109399000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1662340000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1074850000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	50834000	USD
CY2014Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	55532000	USD
CY2013Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	13431000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	26988000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	21940000	USD
CY2014Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	15231000	USD
CY2014Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	5362000	USD
CY2013Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	7264000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	20218000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	22758000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	126526000	USD
CY2014Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	38955000	USD
CY2013Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	74595000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	245246000	USD
CY2014Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	43329195	shares
CY2013Q3	us-gaap	Revenues Revenues	486813000	USD
CY2014Q3	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	559946000	USD
CY2013Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	550897000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
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CY2014Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1280148000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1202015000	USD
	us-gaap	Revenues Revenues	1531278000	USD
CY2014Q3	us-gaap	Revenues Revenues	515358000	USD
	us-gaap	Revenues Revenues	1415707000	USD
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	us-gaap	Share Based Compensation ShareBasedCompensation	7421000	USD
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CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1153928000	USD
CY2014Q3	us-gaap	Stockholders Equity StockholdersEquity	1266925000	USD
CY2013Q3	us-gaap	Stockholders Equity StockholdersEquity	1124209000	USD
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	43198622	shares
CY2014Q3	us-gaap	Treasury Stock Value TreasuryStockValue	562280000	USD
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	559360000	USD
CY2014Q3	us-gaap	Unearned Premiums UnearnedPremiums	1143979000	USD
CY2013Q4	us-gaap	Unearned Premiums UnearnedPremiums	1059155000	USD
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	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2013Q3	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
CY2014Q3	sigi	Accretion Of Credit Loss Impairments Previously Recognized Due To Increase In Cash Flows Expected To Be Collected AccretionOfCreditLossImpairmentsPreviouslyRecognizedDueToIncreaseInCashFlowsExpectedToBeCollected	0	USD
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	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	1803000	USD
CY2013Q3	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	472000	USD
CY2014Q3	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	373000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	367000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	631000	USD
CY2013Q3	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	165000	USD
CY2014Q3	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	130000	USD
CY2013Q3	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	307000	USD
CY2014Q3	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	243000	USD
	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	683000	USD
	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	1172000	USD
CY2013Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	-49111000	USD
CY2014Q3	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	-6110000	USD
CY2013Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-3540000	USD
CY2014Q3	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-13671000	USD
CY2013Q4	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1411868000	USD
CY2014Q3	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	533143000	USD
CY2013Q4	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	43662000	USD
CY2014Q3	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	507738000	USD
	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	177275000	USD
	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	51162000	USD
CY2013Q3	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	41108000	USD
CY2014Q3	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	46268000	USD
	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	52524000	USD
	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	7036000	USD
CY2013Q3	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	10650000	USD
CY2014Q3	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	11993000	USD
	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	17000000	USD
	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	4699000	USD
CY2014Q1	sigi	Gross Premiums Writtenof Self Insured Pooled Group Book Of Business Sold GrossPremiumsWrittenofSelfInsuredPooledGroupBookOfBusinessSold	38000000	USD
CY2013Q4	sigi	Held To Maturity And Available For Sale Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position For Twelve Months Or Longer HeldToMaturityAndAvailableForSaleSecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionForTwelveMonthsOrLonger	635000	USD
CY2014Q3	sigi	Held To Maturity And Available For Sale Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position For Twelve Months Or Longer HeldToMaturityAndAvailableForSaleSecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionForTwelveMonthsOrLonger	516000	USD
CY2013Q4	sigi	Held To Maturity And Available For Sale Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturityAndAvailableForSaleSecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	5000	USD
CY2014Q3	sigi	Held To Maturity And Available For Sale Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturityAndAvailableForSaleSecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	8000	USD
	sigi	Held To Maturity Securities Average Duration HeldToMaturitySecuritiesAverageDuration	P2Y0M0D
CY2013Q4	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	2257000	USD
CY2014Q3	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	1207000	USD
CY2013Q3	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	32000	USD
CY2014Q3	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	0	USD
	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	35000	USD
CY2013Q3	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	37000	USD
CY2014Q3	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	4000	USD
	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	86000	USD
	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	18000	USD
CY2013Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	5000	USD
CY2014Q3	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	8000	USD
CY2013Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Monthsor Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsorLonger	635000	USD
CY2014Q3	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Monthsor Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsorLonger	516000	USD
	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	39454000	USD
	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	26936000	USD
CY2013Q3	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	11832000	USD
CY2014Q3	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	22164000	USD
	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	139931000	USD
	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	108019000	USD
CY2013Q3	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	44485000	USD
CY2014Q3	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	75326000	USD
	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	86887000	USD
	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	112876000	USD
	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	68935000	USD
	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	120288000	USD
CY2014Q3	sigi	Increase Decrease Policyholder Benefits And Claims Incurred Gross IncreaseDecreasePolicyholderBenefitsAndClaimsIncurredGross	46100000	USD
CY2014Q3	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	406	Securities
CY2013Q4	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	557	Securities
	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
	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
CY2014Q3	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
CY2013Q3	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
	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 Amortization Pension And Other Postretirement Benefit Plans Curtailment Expense Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansCurtailmentExpenseRecognizedInNetPeriodicBenefitCostTax	-5000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-1669000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-14000	USD
CY2013Q3	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-1000	USD
CY2014Q3	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-1200000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-9000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-1085000	USD
CY2013Q3	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-1000	USD
CY2014Q3	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-780000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-584000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-5000	USD
CY2013Q3	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	0	USD
CY2014Q3	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-420000	USD
CY2014Q3	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
CY2013Q3	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	80000	USD
CY2014Q3	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	1000	USD
CY2013Q3	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	1000	USD
	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	940000	USD
	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
CY2013Q4	sigi	Percentage Decline In Fair Value Percentage PercentageDeclineInFairValuePercentage	0.06
CY2014Q3	sigi	Percentage Decline In Fair Value Percentage PercentageDeclineInFairValuePercentage	0.03
	sigi	Percentage Of Unpaid Nfip Claims Ceded By Federal Government PercentageOfUnpaidNfipClaimsCededByFederalGovernment	1.00
CY2014Q3	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	158101000	USD
	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	462540000	USD
	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	428570000	USD
CY2013Q3	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	145314000	USD
	sigi	Repayments Capital Lease Obligations RepaymentsCapitalLeaseObligations	768000	USD
	sigi	Repayments Capital Lease Obligations RepaymentsCapitalLeaseObligations	1858000	USD
CY2013Q4	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	2900000	USD
CY2014Q3	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	13200000	USD
CY2014Q3	sigi	Securities Pledged As Collateral SecuritiesPledgedAsCollateral	102500000	USD
CY2014Q3	sigi	Securities Pledged As Collateral For Reinsurance Obligations SecuritiesPledgedAsCollateralForReinsuranceObligations	15300000	USD
	sigi	Stock Split Related To Equity Securities Afs StockSplitRelatedToEquitySecuritiesAFS	0	USD
	sigi	Stock Split Related To Equity Securities Afs StockSplitRelatedToEquitySecuritiesAFS	334000	USD
CY2014Q3	sigi	Taxoninvestmentincome Taxoninvestmentincome	13858000	USD
	sigi	Taxoninvestmentincome Taxoninvestmentincome	36374000	USD
	sigi	Taxoninvestmentincome Taxoninvestmentincome	31960000	USD
CY2013Q3	sigi	Taxoninvestmentincome Taxoninvestmentincome	12648000	USD
CY2013Q3	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	33240000	USD
	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	97214000	USD
	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	89310000	USD
CY2014Q3	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	35665000	USD
CY2014Q3	sigi	Total Investment Revenues TotalInvestmentRevenues	49523000	USD
	sigi	Total Investment Revenues TotalInvestmentRevenues	133588000	USD
	sigi	Total Investment Revenues TotalInvestmentRevenues	121270000	USD
CY2013Q3	sigi	Total Investment Revenues TotalInvestmentRevenues	45888000	USD
CY2013Q3	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	56039000	USD
	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	173094000	USD
CY2014Q3	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	83960000	USD
	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	148065000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	36202000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-104302000	USD
CY2013Q3	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-4167000	USD
CY2014Q3	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-29439000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	12670000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-36506000	USD
CY2013Q3	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-1459000	USD
CY2014Q3	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-10305000	USD
	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	-23532000	USD
	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	67796000	USD
CY2013Q3	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	2708000	USD
CY2014Q3	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	19134000	USD
CY2014Q3	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	19257000	USD
CY2013Q4	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	52011000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
	dei	Document Period End Date DocumentPeriodEndDate	2014-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000230557
CY2014Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	56424220	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	SELECTIVE INSURANCE GROUP INC

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$SIGI
Selective Insurance Group Inc Stock $sigi

2014 Q3 Form 10-Q Financial Statement

#000023055714000012 Filed on October 30, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI Selective Insurance Group Inc Stock $sigi

2014 Q3 Form 10-Q Financial Statement

#000023055714000012 Filed on October 30, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI
Selective Insurance Group Inc Stock $sigi