$SIGI
Selective Insurance Group Inc Stock $sigi

$sigi Overview Financials Valuation SEC Filings Company Website

2014 Q2 Form 10-Q Financial Statement

#000023055714000009 Filed on July 31, 2014

Income Statement

Concept	2014 Q2	2013 Q2
Revenue	$506.8M	$468.9M
YoY Change	8.08%	9.33%
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	$8.300M	$10.00M
YoY Change	-17.0%	1.01%
% of Gross Profit
Operating Expenses	$461.9M	$427.1M
YoY Change	8.15%	0.52%
Operating Profit
YoY Change
Interest Expense	-$5.400M	-$5.600M
YoY Change	-3.57%	19.15%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$39.52M	$36.20M
YoY Change	9.17%	-5331.36%
Income Tax	$10.18M	$9.079M
% Of Pretax Income	25.76%	25.08%
Net Earnings	$29.34M	$27.12M
YoY Change	8.18%	9317.36%
Net Earnings / Revenue	5.79%	5.78%
Basic Earnings Per Share	$0.52	$0.49
Diluted Earnings Per Share	$0.51	$0.48
COMMON SHARES
Basic Shares Outstanding	56.37M shares	55.73M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2014 Q2	2013 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments
Other Short-Term Assets		$140.8M
YoY Change		2.92%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets		$177.2M
YoY Change		2.49%
LONG-TERM ASSETS
Property, Plant & Equipment	$53.84M	$48.84M
YoY Change	10.23%	6.9%
Goodwill	$7.849M	$7.849M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$4.739B	$4.367B
YoY Change	8.52%	4.57%
Other Assets	$97.40M	$135.9M
YoY Change	-28.33%	19.32%
Total Long-Term Assets		$5.935B
YoY Change		7.63%
TOTAL ASSETS
Total Short-Term Assets		$177.2M
Total Long-Term Assets		$5.935B
Total Assets	$6.491B	$6.113B
YoY Change	6.18%	7.48%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$84.90M	$102.2M
YoY Change	-16.93%	-10.04%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$95.10M	$102.2M
YoY Change	-6.95%	-10.04%
LONG-TERM LIABILITIES
Long-Term Debt	$392.3M	$392.4M
YoY Change	-0.03%	27.65%
Other Long-Term Liabilities	$213.0M	$200.8M
YoY Change	6.08%	20.82%
Total Long-Term Liabilities	$605.3M	$593.2M
YoY Change	2.04%	25.25%
TOTAL LIABILITIES
Total Short-Term Liabilities	$95.10M	$102.2M
Total Long-Term Liabilities	$605.3M	$593.2M
Total Liabilities	$5.253B	$5.014B
YoY Change	4.77%	8.93%
SHAREHOLDERS EQUITY
Retained Earnings	$1.234B	$1.159B
YoY Change	6.52%	3.46%
Common Stock	$497.7M	$479.8M
YoY Change	3.73%	3.94%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$562.1M	$558.9M
YoY Change	0.58%	0.66%
Treasury Stock Shares	43.32M shares	43.18M shares
Shareholders Equity	$1.238B	$1.099B
YoY Change
Total Liabilities & Shareholders Equity	$6.491B	$6.113B
YoY Change	6.18%	7.48%

Cashflow Statement

Concept	2014 Q2	2013 Q2
OPERATING ACTIVITIES
Net Income	$29.34M	$27.12M
YoY Change	8.18%	9317.36%
Depreciation, Depletion And Amortization	$8.300M	$10.00M
YoY Change	-17.0%	1.01%
Cash From Operating Activities	$36.90M	$69.80M
YoY Change	-47.13%	328.22%
INVESTING ACTIVITIES
Capital Expenditures	-$900.0K	-$3.100M
YoY Change	-70.97%	-31.11%
Acquisitions
YoY Change
Other Investing Activities	-$29.10M	-$62.50M
YoY Change	-53.44%	861.54%
Cash From Investing Activities	-$30.00M	-$65.60M
YoY Change	-54.27%	496.36%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-5.600M	-4.400M
YoY Change	27.27%	-16.98%
NET CHANGE
Cash From Operating Activities	36.90M	69.80M
Cash From Investing Activities	-30.00M	-65.60M
Cash From Financing Activities	-5.600M	-4.400M
Net Change In Cash	1.300M	-200.0K
YoY Change	-750.0%	-2386092942221954.0%
FREE CASH FLOW
Cash From Operating Activities	$36.90M	$69.80M
Capital Expenditures	-$900.0K	-$3.100M
Free Cash Flow	$37.80M	$72.90M
YoY Change	-48.15%	250.48%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2014Q2	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	10150000	USD
CY2013Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	0	USD
CY2014Q2	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	37747000	USD
CY2013Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	37382000	USD
CY2014Q2	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	84870000	USD
CY2013Q4	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	111427000	USD
CY2014Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	184748000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	179192000	USD
CY2014Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	68012000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	24851000	USD
CY2013Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	288182000	USD
CY2014Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	298352000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	25357000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	49468000	USD
CY2014Q2	us-gaap	Assets Assets	6490585000	USD
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.88
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.83
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
	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 Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2014Q2	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10385000	USD
CY2013Q4	us-gaap	Assets Assets	6270170000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	21414000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	20570000	USD
CY2013Q2	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	8951000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	12860000	USD
CY2013Q2	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	4378000	USD
CY2014Q2	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	5837000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	13687000	USD
CY2014Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3792036000	USD
CY2013Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3675977000	USD
CY2014Q2	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	166214000	USD
CY2013Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	155350000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	3908307000	USD
CY2014Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	4101548000	USD
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3831327000	USD
CY2014Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3958250000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1411803000	USD
CY2014Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	132555000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	40731000	USD
CY2014Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	674220000	USD
CY2014Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1404203000	USD
CY2014Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2007460000	USD
CY2014Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	76856000	USD
CY2014Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	401681000	USD
CY2014Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3890200000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3715536000	USD
CY2014Q2	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	211348000	USD
CY2013Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	192771000	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;">These Financial Statements reflect all adjustments that, in our opinion, are normal, recurring, and necessary for a fair presentation of our results of operations and financial condition. The Financial Statements cover the </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">second</font><font style="font-family:inherit;font-size:10pt;"> quarters ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June 30, 2014</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Second Quarter 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;">June 30, 2013</font><font style="font-family:inherit;font-size:10pt;"> (“</font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Second Quarter 2013</font><font style="font-family:inherit;font-size:10pt;">”) and the </font><font style="font-family:inherit;font-size:10pt;">six</font><font style="font-family:inherit;font-size:10pt;">-month periods ended </font><font style="font-family:inherit;font-size:10pt;">June 30, 2014</font><font style="font-family:inherit;font-size:10pt;"> ("</font><font style="font-family:inherit;font-size:10pt;">Six Months 2014</font><font style="font-family:inherit;font-size:10pt;">") and </font><font style="font-family:inherit;font-size:10pt;">June 30, 2013</font><font style="font-family:inherit;font-size:10pt;"> ("</font><font style="font-family:inherit;font-size:10pt;">Six 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>
CY2014Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	467328000	USD
CY2013Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	432744000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	863825000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	951315000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	2124000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1898000	USD
CY2014Q2	us-gaap	Cash Cash	1547000	USD
CY2013Q4	us-gaap	Cash Cash	193000	USD
CY2013Q2	us-gaap	Cash Cash	154000	USD
CY2012Q4	us-gaap	Cash Cash	210000	USD
	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	1354000	USD
	us-gaap	Cash Period Increase Decrease CashPeriodIncreaseDecrease	-56000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	182063000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	172369000	USD
CY2013Q2	us-gaap	Ceded Premiums Earned CededPremiumsEarned	86780000	USD
CY2014Q2	us-gaap	Ceded Premiums Earned CededPremiumsEarned	91673000	USD
CY2014Q2	us-gaap	Ceded Premiums Written CededPremiumsWritten	98328000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	187319000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	180565000	USD
CY2013Q2	us-gaap	Ceded Premiums Written CededPremiumsWritten	93391000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
CY2013Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2014Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2014Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2014Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	360000000	shares
CY2014Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99697374	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99120235	shares
CY2014Q2	us-gaap	Common Stock Value CommonStockValue	199395000	USD
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	198240000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13668000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-35521000	USD
CY2014Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	55824000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	90476000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15319000	USD
CY2014Q2	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8781000	USD
CY2013Q2	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6221000	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13674000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1968000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1971000	USD
	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	-16000	USD
	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	0	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	23103000	USD
CY2014Q2	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1399000	USD
CY2013Q2	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2858000	USD
CY2014Q2	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	182087000	USD
CY2013Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	172981000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	9106000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	9555000	USD
CY2014Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	97401000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	122613000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	18912000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1081613000	USD
CY2014Q2	us-gaap	Direct Premiums Earned DirectPremiumsEarned	544913000	USD
CY2013Q2	us-gaap	Direct Premiums Earned DirectPremiumsEarned	504081000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	998147000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	1130205000	USD
CY2014Q2	us-gaap	Direct Premiums Written DirectPremiumsWritten	572314000	USD
CY2013Q2	us-gaap	Direct Premiums Written DirectPremiumsWritten	551190000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	1080006000	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2014Q2	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
CY2013Q2	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	-538000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2014Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
CY2014Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.51
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	955000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1467000	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
	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
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
CY2014Q2	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	61600000	USD
CY2014Q2	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	13139000	USD
CY2013Q2	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	5709000	USD
CY2014Q2	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	4958000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	11013000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	7849000	USD
CY2014Q2	us-gaap	Goodwill Goodwill	7849000	USD
CY2014Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	364938000	USD
CY2013Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	392879000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1482000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	65000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2496000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2931000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	24803000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	21428000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	245500000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	230116000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	115199000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	113394000	USD
CY2013Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	416981000	USD
CY2014Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	385502000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1382000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	2427000	USD
CY2014Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	419000	USD
CY2013Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	508000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	27122000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	47315000	USD
CY2014Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	29341000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	49427000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	36201000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	65069000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	64605000	USD
CY2014Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	39521000	USD
CY2014Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.52
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.89
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.84
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.49
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.48
CY2014Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.51
CY2014Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2014Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-419000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	138000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17290000	USD
CY2014Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10180000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9079000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15642000	USD
CY2014Q2	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	-26557000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-6173000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	12634000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	3171000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	1066000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	361000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	5425000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	4526000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	64747000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	84135000	USD
	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-5478000	USD
	us-gaap	Increase Decrease In Property And Casualty Insurance Liabilities IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities	-16872000	USD
CY2013Q2	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	279594000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	618341000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	549443000	USD
CY2014Q2	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	297795000	USD
CY2014Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	5425000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	11401000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	10986000	USD
CY2013Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	5570000	USD
	us-gaap	Interest Paid InterestPaid	11113000	USD
	us-gaap	Interest Paid InterestPaid	10295000	USD
CY2014Q2	us-gaap	Investments Investments	4739099000	USD
CY2013Q4	us-gaap	Investments Investments	4583312000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	5116242000	USD
CY2014Q2	us-gaap	Liabilities Liabilities	5252510000	USD
CY2014Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6490585000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6270170000	USD
CY2014Q2	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3451306000	USD
CY2013Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	3349770000	USD
CY2014Q2	us-gaap	Long Term Debt LongTermDebt	392290000	USD
CY2013Q4	us-gaap	Long Term Debt LongTermDebt	392414000	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 ("NFIPs") write-your-own ("WYO") program;</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our E&S Insurance Operations segment sells Commercial Lines property and casualty insurance products and services to insureds who have not obtained coverage in the standard market; and</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our Investments segment, which invests the premiums collected by our Standard and E&S Insurance Operations and amounts generated through our capital management strategies, which may include the issuance of debt and equity securities.</font></div></td></tr></table></div>
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-13608000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	66718000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-57710000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-164672000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	97898000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	72672000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	27122000	USD
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	29341000	USD
	us-gaap	Net Income Loss NetIncomeLoss	47315000	USD
	us-gaap	Net Income Loss NetIncomeLoss	48430000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3
CY2014Q2	us-gaap	Other Assets OtherAssets	74388000	USD
CY2013Q4	us-gaap	Other Assets OtherAssets	75727000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
CY2013Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	28600000	USD
CY2014Q2	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
CY2013Q2	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
CY2014Q2	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 Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	4000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	40743000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-53480000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-96374000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	66402000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-62643000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-34762000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	43161000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	26483000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-381000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-46655000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-789000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-761000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-513000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-495000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-248000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-30326000	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
CY2014Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-133000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-16329000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-276000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-266000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	5008000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	11264000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	5288000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	12237000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	7322000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	3438000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	3255000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	7954000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1753000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	3942000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1850000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	4283000	USD
CY2014Q2	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 Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-2629000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-789000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-761000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-248000	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	-1709000	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	-495000	USD
CY2013Q2	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
CY2014Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-133000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-920000	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
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	23241000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	45122000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-276000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-266000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	14260000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-18718000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-33731000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-87630000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-91314000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	78086000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	29329000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	50755000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-56959000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-59353000	USD
CY2014Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	15793000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-30671000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-31961000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	27331000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	17549000	USD
CY2014Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8935000	USD
CY2013Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3852000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	19725000	USD
	us-gaap	Other General Expense OtherGeneralExpense	13543000	USD
CY2014Q2	us-gaap	Other General Expense OtherGeneralExpense	6451000	USD
CY2013Q2	us-gaap	Other General Expense OtherGeneralExpense	1869000	USD
	us-gaap	Other General Expense OtherGeneralExpense	15556000	USD
CY2013Q2	us-gaap	Other Income OtherIncome	3536000	USD
	us-gaap	Other Income OtherIncome	6320000	USD
CY2014Q2	us-gaap	Other Income OtherIncome	1911000	USD
	us-gaap	Other Income OtherIncome	11735000	USD
CY2014Q2	us-gaap	Other Investments OtherInvestments	106125000	USD
CY2013Q4	us-gaap	Other Investments OtherInvestments	107875000	USD
CY2013Q4	us-gaap	Other Liabilities OtherLiabilities	203476000	USD
CY2014Q2	us-gaap	Other Liabilities OtherLiabilities	213030000	USD
CY2013Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	174251000	USD
CY2014Q2	us-gaap	Other Short Term Investments OtherShortTermInvestments	166488000	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	2000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	11000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
	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
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	5534000	USD
CY2014Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7486000	USD
CY2013Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7488000	USD
CY2012Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	7477000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus	0	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	1954000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	1954000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2014Q2	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
CY2013Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	47000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	77000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	1382000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	555000	USD
CY2014Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	419000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	2504000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	6628000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	6761000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3285000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2786000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	13668000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	13914000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	530402000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	339362000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	111886000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	42546000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	6039000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4393000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	1116873000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	764692000	USD
CY2014Q2	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	332707000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	704600000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	691056000	USD
CY2013Q2	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	338954000	USD
CY2014Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
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	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2013Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
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CY2014Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	847192000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	920120000	USD
CY2013Q2	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	426252000	USD
CY2014Q2	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	463625000	USD
CY2013Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2014Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2013Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2014Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	4442000	USD
CY2014Q2	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	3733000	USD
CY2013Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	524870000	USD
CY2014Q2	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	589617000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	912301000	USD
CY2013Q2	us-gaap	Premiums Written Net PremiumsWrittenNet	462177000	USD
CY2014Q2	us-gaap	Premiums Written Net PremiumsWrittenNet	479823000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	956573000	USD
CY2014Q2	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	148256000	USD
CY2013Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	143000000	USD
	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	8000000	USD
CY2014Q1	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	8000000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	1225000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	6077000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	7726000	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	3091000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	3769000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	286905000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	222568000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	48186000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	28595000	USD
CY2013Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	42200000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	49100000	USD
CY2014Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	68700000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	131600000	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	19557000	USD
	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	49000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1144853000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	772455000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	42206000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	111996000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	50834000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	11757000	USD
CY2014Q2	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	4539000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	8509000	USD
CY2013Q2	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	5154000	USD
CY2014Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	53836000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	14856000	USD
CY2013Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	6420000	USD
CY2014Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	7377000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	15494000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	170651000	USD
CY2013Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	65780000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	87571000	USD
CY2014Q2	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	42289000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	100000000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1202015000	USD
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CY2013Q2	us-gaap	Revenues Revenues	468945000	USD
CY2014Q2	us-gaap	Revenues Revenues	506849000	USD
	us-gaap	Revenues Revenues	1015920000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	6189000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	6102000	USD
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	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	33514	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	547190	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	682661	shares
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1153928000	USD
CY2014Q2	us-gaap	Stockholders Equity StockholdersEquity	1238075000	USD
CY2013Q2	us-gaap	Stockholders Equity StockholdersEquity	1099045000	USD
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	43198622	shares
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CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	559360000	USD
CY2014Q2	us-gaap	Treasury Stock Value TreasuryStockValue	562146000	USD
CY2013Q4	us-gaap	Unearned Premiums UnearnedPremiums	1059155000	USD
CY2014Q2	us-gaap	Unearned Premiums UnearnedPremiums	1100864000	USD
CY2013Q4	sigi	Afs Securities Gross Unrealized Gain AFSSecuritiesGrossUnrealizedGain	128951000	USD
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CY2013Q4	sigi	Afs Securities Gross Unrealized Losses AFSSecuritiesGrossUnrealizedLosses	51971000	USD
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CY2013Q4	sigi	Afs Unrealized Losses12 Months Or Longer AFSUnrealizedLosses12MonthsOrLonger	-2865000	USD
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CY2013Q4	sigi	Afs Unrealized Losses Less Than12 Month AFSUnrealizedLossesLessThan12Month	-49106000	USD
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CY2013Q2	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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CY2014Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	221000	USD
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CY2013Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	614000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax	677000	USD
CY2014Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	77000	USD
CY2013Q2	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	215000	USD
	sigi	Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax	237000	USD
CY2013Q2	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	399000	USD
	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	440000	USD
	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	865000	USD
CY2014Q2	sigi	Amortizationof Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Netof Tax AmortizationofNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax	144000	USD
CY2014Q2	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	-418000	USD
CY2013Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	-49111000	USD
CY2014Q2	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-13466000	USD
CY2013Q4	sigi	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-3540000	USD
CY2014Q2	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	134037000	USD
CY2013Q4	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1411868000	USD
CY2014Q2	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	676716000	USD
CY2013Q4	sigi	Available For Saleand Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleandHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	43662000	USD
CY2014Q2	sigi	Carrying Value Bonds On Deposit With Various Stateand Regulatory Agencies CarryingValueBondsOnDepositWithVariousStateandRegulatoryAgencies	26000000	USD
CY2014Q2	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	80264000	USD
	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	10054000	USD
CY2013Q2	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	-60173000	USD
	sigi	Comprehensive Income Loss Before Tax ComprehensiveIncomeLossBeforeTax	131007000	USD
CY2014Q2	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	24440000	USD
	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	-3614000	USD
CY2013Q2	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	-24652000	USD
	sigi	Comprehensive Income Loss Tax ComprehensiveIncomeLossTax	40531000	USD
	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	11000000	USD
	sigi	Federal Income Taxes Paid Net FederalIncomeTaxesPaidNet	3699000	USD
CY2014Q1	sigi	Gross Premiums Writtenof Self Insured Pooled Group Book Of Business Sold GrossPremiumsWrittenofSelfInsuredPooledGroupBookOfBusinessSold	38000000	USD
CY2014Q2	sigi	Held To Maturity And Available For Sale Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position For Twelve Months Or Longer HeldToMaturityAndAvailableForSaleSecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionForTwelveMonthsOrLonger	564000	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
CY2014Q2	sigi	Held To Maturity And Available For Sale Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturityAndAvailableForSaleSecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	-5000	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
CY2013Q4	sigi	Held To Maturity Securities Amortized Cost HeldToMaturitySecuritiesAmortizedCost	390622000	USD
CY2014Q2	sigi	Held To Maturity Securities Amortized Cost HeldToMaturitySecuritiesAmortizedCost	363358000	USD
	sigi	Held To Maturity Securities Average Duration HeldToMaturitySecuritiesAverageDuration	P1Y10M8D
CY2014Q2	sigi	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-583000	USD
CY2013Q4	sigi	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	-675000	USD
CY2013Q4	sigi	Held To Maturity Securities Gross Unrecognized Holding Gains HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	24102000	USD
CY2014Q2	sigi	Held To Maturity Securities Gross Unrecognized Holding Gains HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	20569000	USD
CY2013Q4	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	2257000	USD
CY2014Q2	sigi	Held To Maturity Securities Net Unrealized Gains Losses HeldToMaturitySecuritiesNetUnrealizedGainsLosses	1580000	USD
CY2014Q2	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
CY2013Q2	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
	sigi	Held To Maturity Securities Realized Gain HeldToMaturitySecuritiesRealizedGain	3000	USD
CY2014Q2	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	3000	USD
CY2013Q2	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	12000	USD
	sigi	Held To Maturity Securities Sold Security Realized Loss HeldToMaturitySecuritiesSoldSecurityRealizedLoss	14000	USD
CY2014Q2	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	-5000	USD
CY2013Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Less Than Twelve Months HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionLessThanTwelveMonths	5000	USD
CY2014Q2	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Monthsor Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsorLonger	564000	USD
CY2013Q4	sigi	Held To Maturity Securities Unrecognized Gains Losses Aggregate Continuous Unrealized Loss Position Twelve Monthsor Longer HeldToMaturitySecuritiesUnrecognizedGainsLossesAggregateContinuousUnrealizedLossPositionTwelveMonthsorLonger	635000	USD
CY2014Q2	sigi	Heldto Maturity Securities Continuous Unrealized Loss Position Lessthan Twelve Months Aggregate Losses HeldtoMaturitySecuritiesContinuousUnrealizedLossPositionLessthanTwelveMonthsAggregateLosses	3000	USD
CY2013Q4	sigi	Heldto Maturity Securities Continuous Unrealized Loss Position Lessthan Twelve Months Aggregate Losses HeldtoMaturitySecuritiesContinuousUnrealizedLossPositionLessthanTwelveMonthsAggregateLosses	-5000	USD
CY2014Q2	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	10180000	USD
	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	15104000	USD
CY2013Q2	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	9079000	USD
	sigi	Income From Continuing Operations And Discontinued Operations Tax IncomeFromContinuingOperationsAndDiscontinuedOperationsTax	17290000	USD
CY2014Q2	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	39521000	USD
	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	63534000	USD
CY2013Q2	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	36201000	USD
	sigi	Income Loss From Continuing Operations And Discontinued Operations Before Federal Income Tax IncomeLossFromContinuingOperationsAndDiscontinuedOperationsBeforeFederalIncomeTax	64605000	USD
	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	93675000	USD
	sigi	Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables	69790000	USD
	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	65225000	USD
	sigi	Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance And Advance Premiums IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsuranceAndAdvancePremiums	36997000	USD
CY2013Q2	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	34003000	USD
CY2014Q2	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	36774000	USD
	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	72308000	USD
	sigi	Net Investment Income Earned NetInvestmentIncomeEarned	66873000	USD
	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	77000	USD
CY2013Q2	sigi	Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross	47000	USD
	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	27000	USD
CY2013Q2	sigi	Non Credit Portionof Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Tax NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax	16000	USD
CY2014Q2	sigi	Non Credit Portionof Other Than Temporary Impairments Recognizedin Other Comprehensive Income NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome	0	USD
	sigi	Non Credit Portionof Other Than Temporary Impairments Recognizedin Other Comprehensive Income NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome	50000	USD
CY2013Q2	sigi	Non Credit Portionof Other Than Temporary Impairments Recognizedin Other Comprehensive Income NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome	31000	USD
	sigi	Non Credit Portionof Other Than Temporary Impairments Recognizedin Other Comprehensive Income NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome	0	USD
	sigi	Number Of Insurance Subsidiaries NumberOfInsuranceSubsidiaries	10
CY2014Q2	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	288	Securities
CY2013Q4	sigi	Number Of Securities In Unrealized Unrecognized Loss Position NumberOfSecuritiesInUnrealizedUnrecognizedLossPosition	557	Securities
CY2014Q2	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
	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
CY2013Q2	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
CY2014Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-469000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-13000	USD
CY2013Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-6000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax	-469000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-8000	USD
CY2014Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-305000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-305000	USD
CY2013Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax	-3000	USD
CY2014Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-164000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-5000	USD
CY2013Q2	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-3000	USD
	sigi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Non Credit Other Than Temporary Impaired Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax	-164000	USD
	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
CY2014Q2	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
CY2013Q2	sigi	Other Investments Realized Gains OtherInvestmentsRealizedGains	0	USD
	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	860000	USD
CY2014Q2	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
CY2013Q2	sigi	Other Investments Realized Losses OtherInvestmentsRealizedLosses	0	USD
CY2014Q2	sigi	Percentage Decline In Fair Value Percentage PercentageDeclineInFairValuePercentage	0.02
CY2013Q4	sigi	Percentage Decline In Fair Value Percentage PercentageDeclineInFairValuePercentage	0.06
	sigi	Percentage Of Unpaid Nfip Claims Ceded By Federal Government PercentageOfUnpaidNfipClaimsCededByFederalGovernment	1.00
CY2013Q2	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	143728000	USD
CY2014Q2	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	155173000	USD
	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	304439000	USD
	sigi	Policy Acquisition Costs PolicyAcquisitionCosts	283256000	USD
CY2014Q2	sigi	Reinsurance Recoverables Net ReinsuranceRecoverablesNet	558758000	USD
CY2013Q4	sigi	Reinsurance Recoverables Net ReinsuranceRecoverablesNet	550897000	USD
	sigi	Repayments Capital Lease Obligations RepaymentsCapitalLeaseObligations	0	USD
	sigi	Repayments Capital Lease Obligations RepaymentsCapitalLeaseObligations	954000	USD
CY2014Q2	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	12900000	USD
CY2013Q4	sigi	Securities In Unrealized Unrecognized Loss Position For More Than Twelve Months Unrealized Unrecognized Loss SecuritiesInUnrealizedUnrecognizedLossPositionForMoreThanTwelveMonthsUnrealizedUnrecognizedLoss	2900000	USD
CY2014Q2	sigi	Securities Pledged As Collateral SecuritiesPledgedAsCollateral	104000000	USD
CY2014Q2	sigi	Securities Pledged As Collateral For Reinsurance Obligations SecuritiesPledgedAsCollateralForReinsuranceObligations	16400000	USD
	sigi	Segment Reporting Revenue SegmentReportingRevenue	928822000	USD
CY2014Q2	sigi	Segment Reporting Revenue SegmentReportingRevenue	506846000	USD
CY2013Q2	sigi	Segment Reporting Revenue SegmentReportingRevenue	468937000	USD
	sigi	Segment Reporting Revenue SegmentReportingRevenue	1015912000	USD
	sigi	Stock Split Related To Equity Securities Afs StockSplitRelatedToEquitySecuritiesAFS	334000	USD
	sigi	Stock Split Related To Equity Securities Afs StockSplitRelatedToEquitySecuritiesAFS	0	USD
	sigi	Taxfree Exchange Of Fixed Maturity Security Afs TaxfreeExchangeOfFixedMaturitySecurityAFS	9180000	USD
	sigi	Taxfree Exchange Of Fixed Maturity Security Afs TaxfreeExchangeOfFixedMaturitySecurityAFS	13615000	USD
	sigi	Taxfree Exchange Of Fixed Maturity Security Htm TaxfreeExchangeOfFixedMaturitySecurityHTM	15000	USD
	sigi	Taxfree Exchange Of Fixed Maturity Security Htm TaxfreeExchangeOfFixedMaturitySecurityHTM	10710000	USD
	sigi	Taxoninvestmentincome Taxoninvestmentincome	22516000	USD
CY2014Q2	sigi	Taxoninvestmentincome Taxoninvestmentincome	10941000	USD
	sigi	Taxoninvestmentincome Taxoninvestmentincome	19312000	USD
CY2013Q2	sigi	Taxoninvestmentincome Taxoninvestmentincome	10107000	USD
CY2014Q2	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	30372000	USD
CY2013Q2	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	29050000	USD
	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	56070000	USD
	sigi	Total Investment Income After Federal Income Tax TotalInvestmentIncomeAfterFederalIncomeTax	61549000	USD
CY2014Q2	sigi	Total Investment Revenues TotalInvestmentRevenues	41313000	USD
	sigi	Total Investment Revenues TotalInvestmentRevenues	84065000	USD
	sigi	Total Investment Revenues TotalInvestmentRevenues	75382000	USD
CY2013Q2	sigi	Total Investment Revenues TotalInvestmentRevenues	39157000	USD
CY2013Q2	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	43640000	USD
	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	89134000	USD
CY2014Q2	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	51397000	USD
	sigi	Total Segment Income Loss From Continuing Operations Before Federal Income Tax TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax	92026000	USD
CY2014Q2	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	40362000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-100135000	USD
CY2013Q2	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	-97163000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Gross TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross	65641000	USD
CY2014Q2	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	14127000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-35047000	USD
CY2013Q2	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	-34007000	USD
	sigi	Total Unrealized Gains Losses On Investment Securities Tax TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax	22975000	USD
CY2013Q2	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	63156000	USD
	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	65088000	USD
CY2014Q2	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	-26235000	USD
	sigi	Total Unrealized Gains Losseson Investment Securities TotalUnrealizedGainsLossesonInvestmentSecurities	-42666000	USD
CY2014Q2	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	13325000	USD
CY2013Q4	sigi	Unrealized Unrecognized Loss UnrealizedUnrecognizedLoss	52011000	USD
	sigi	Unrealized Unrecognized Losses Period Increase Decrease UnrealizedUnrecognizedLossesPeriodIncreaseDecrease	38700000	USD
CY2013Q4	sigi	Unrecoginzed Holding Losses UnrecoginzedHoldingLosses	0	USD
CY2014Q2	sigi	Unrecoginzed Holding Losses UnrecoginzedHoldingLosses	5000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
	dei	Document Period End Date DocumentPeriodEndDate	2014-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000230557
CY2014Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	56373933	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 Q2 Form 10-Q Financial Statement

#000023055714000009 Filed on July 31, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI Selective Insurance Group Inc Stock $sigi

2014 Q2 Form 10-Q Financial Statement

#000023055714000009 Filed on July 31, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SIGI
Selective Insurance Group Inc Stock $sigi