$WRB
BERKLEY W R CORP Stock $wrb

$wrb Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-Q Financial Statement

#000001154411000048 Filed on November 07, 2011

Income Statement

Concept	2011 Q4	2011 Q3	2010 Q3
Revenue	$1.371B	$1.280B	$1.176B
YoY Change	11.34%	8.81%	3.5%
Cost Of Revenue		$684.0M	$597.9M
YoY Change		14.4%
Gross Profit		$595.8M	$578.2M
YoY Change		3.03%
Gross Profit Margin		46.55%	49.16%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$30.70M	$24.10M	$21.60M
YoY Change	63.3%	11.57%	157.14%
% of Gross Profit		4.05%	3.74%
Operating Expenses	$1.194B	$1.156B	$1.028B
YoY Change	16.19%	12.39%	3.96%
Operating Profit		-$559.7M	-$449.9M
YoY Change		24.42%
Interest Expense	-$28.20M	$28.07M	$26.73M
YoY Change	0.0%	5.03%	-223.73%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$148.7M	$96.10M	$121.3M
YoY Change	-15.32%	-20.77%	-3.58%
Income Tax	$31.70M	$19.78M	$27.63M
% Of Pretax Income	21.32%	20.58%	22.78%
Net Earnings	$117.0M	$76.41M	$93.62M
YoY Change	-7.74%	-18.38%	-4.18%
Net Earnings / Revenue	8.54%	5.97%	7.96%
Basic Earnings Per Share	$0.85	$0.55	$0.64
Diluted Earnings Per Share	$0.82	$0.53	$0.61
COMMON SHARES
Basic Shares Outstanding	137.1M shares	138.8M shares	147.1M shares
Diluted Shares Outstanding		144.5M shares	154.2M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2010 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$911.7M	$866.1M	$922.2M
Short-Term Investments
Other Short-Term Assets	$258.0M	$275.0M	$226.0M
YoY Change	19.44%	21.68%	3.2%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$576.0M	$656.0M	$465.0M
YoY Change	3.78%	41.08%	10.45%
LONG-TERM ASSETS
Property, Plant & Equipment	$262.3M	$263.7M	$252.0M
YoY Change	2.97%	4.64%	2.86%
Goodwill	$87.87M	$90.58M
YoY Change	-3.0%
Intangibles	$32.00M
YoY Change
Long-Term Investments	$680.6M	$610.5M	$13.15B
YoY Change	32.83%	-95.36%	1.4%
Other Assets		$0.00	$46.00M
YoY Change		-100.0%	-70.51%
Total Long-Term Assets	$17.83B	$17.67B	$17.35B
YoY Change	5.03%	1.88%	2.22%
TOTAL ASSETS
Total Short-Term Assets	$576.0M	$656.0M	$465.0M
Total Long-Term Assets	$17.83B	$17.67B	$17.35B
Total Assets	$18.40B	$18.33B	$17.81B
YoY Change	4.99%	2.91%	2.41%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$3.000M
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$1.744B	$1.745B	$1.737B
YoY Change	0.06%	0.46%	9.25%
Other Long-Term Liabilities	$929.0M	$986.0M	$861.0M
YoY Change	4.5%	14.52%	-1.6%
Total Long-Term Liabilities	$2.673B	$2.731B	$2.598B
YoY Change	1.56%	5.12%	5.4%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.000M
Total Long-Term Liabilities	$2.673B	$2.731B	$2.598B
Total Liabilities	$14.44B	$14.46B	$13.99B
YoY Change	4.52%	3.4%	1.42%
SHAREHOLDERS EQUITY
Retained Earnings	$4.491B	$4.439B
YoY Change	7.07%
Common Stock	$988.1M	$974.4M
YoY Change	0.61%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.881B	$1.887B
YoY Change	7.44%
Treasury Stock Shares	97.60M shares	98.04M shares
Shareholders Equity	$3.953B	$3.862B	$3.827B
YoY Change
Total Liabilities & Shareholders Equity	$18.40B	$18.33B	$17.81B
YoY Change	4.99%	2.91%	2.41%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2010 Q3
OPERATING ACTIVITIES
Net Income	$117.0M	$76.41M	$93.62M
YoY Change	-7.74%	-18.38%	-4.18%
Depreciation, Depletion And Amortization	$30.70M	$24.10M	$21.60M
YoY Change	63.3%	11.57%	157.14%
Cash From Operating Activities	$185.1M	$268.8M	$204.0M
YoY Change	205.45%	31.76%	16.91%
INVESTING ACTIVITIES
Capital Expenditures	$243.1M	-$248.4M	-$16.40M
YoY Change	-1984.5%	1414.63%	215.38%
Acquisitions
YoY Change
Other Investing Activities	-$363.9M	$199.3M	-$117.6M
YoY Change	112.56%	-269.47%	-76.03%
Cash From Investing Activities	-$120.8M	-$49.10M	-$134.0M
YoY Change	-34.42%	-63.36%	-72.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-16.20M	-135.0M	61.00M
YoY Change	-89.49%	-321.31%	-80.77%
NET CHANGE
Cash From Operating Activities	185.1M	268.8M	204.0M
Cash From Investing Activities	-120.8M	-49.10M	-134.0M
Cash From Financing Activities	-16.20M	-135.0M	61.00M
Net Change In Cash	48.10M	84.70M	131.0M
YoY Change	-117.31%	-35.34%	-3295.12%
FREE CASH FLOW
Cash From Operating Activities	$185.1M	$268.8M	$204.0M
Capital Expenditures	$243.1M	-$248.4M	-$16.40M
Free Cash Flow	-$58.00M	$517.2M	$220.4M
YoY Change	-178.91%	134.66%	22.65%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	133940000	USD
CY2010Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	138384000	USD
CY2011Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	335741000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	276563000	USD
CY2010Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	935099000	USD
CY2011Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	927348000	USD
CY2010Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	18865000	USD
CY2011Q3	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	18797000	USD
CY2011Q3	us-gaap	Assets Assets	18330821000	USD
CY2010Q4	us-gaap	Assets Assets	17528547000	USD
CY2010Q4	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	12013404000	USD
CY2011Q3	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	11882340000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	535214000	USD
CY2010Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	158523000	USD
CY2011Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	191806000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	506033000	USD
CY2011Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	10578463000	USD
CY2010Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	10737198000	USD
CY2011Q3	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	341407000	USD
CY2010Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	404235000	USD
	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss	121068000	USD
	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss	355481000	USD
CY2011Q3	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss	39515000	USD
CY2010Q3	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss	187631000	USD
CY2011Q3	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	25248000	USD
	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	78164000	USD
CY2010Q3	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	121962000	USD
	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	231241000	USD
CY2010Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	11093159000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	11115992000	USD
CY2010Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	561053000	USD
CY2011Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	438465000	USD
	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	124229000	USD
CY2010Q3	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	65666000	USD
CY2011Q3	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	14268000	USD
	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	42893000	USD
CY2011Q1	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	23000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	21000000	USD
CY2011Q1	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	2000000	USD
CY2011Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	866130000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	642952000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	515430000	USD
CY2010Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	922198000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	642952000	USD
CY2011Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	866130000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	223178000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	406768000	USD
CY2010Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	134689000	USD
CY2011Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	180161000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	428974000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	554577000	USD
CY2011Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.20
CY2010Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.20
CY2011Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2010Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2011Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	137082096	shares
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CY2010Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	141009834	shares
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CY2010Q4	us-gaap	Common Stock Value CommonStockValue	47024000	USD
CY2011Q3	us-gaap	Common Stock Value CommonStockValue	47024000	USD
CY2010Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	234127000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	556123000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	336055000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	72306000	USD
CY2010Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	53000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-87000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-40000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	249000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	335968000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	72266000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	556372000	USD
CY2010Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	234180000	USD
CY2010Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	405942000	USD
CY2011Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	450552000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	65492000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings	28153000	USD
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CY2011Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	64063000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	57332000	USD
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CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
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CY2010Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.14
CY2010Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.05
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	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-500000	USD
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CY2011Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2010Q3	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	640000	USD
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	1061000	USD
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	2940000	USD
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CY2011Q3	us-gaap	Equity Method Investments EquityMethodInvestments	610513000	USD
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CY2011Q3	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	249900000	USD
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CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	42361000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	8464000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	45301000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	76239000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	16936000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	17113000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	-25900000	USD
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CY2010Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	182255000	USD
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CY2010Q3	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	0	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	6090000	USD
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	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	541000	USD
CY2010Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0	USD
CY2011Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	9000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	9000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4985000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4079000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	22650000	USD
CY2011Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	21238000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	73412000	USD
CY2010Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	5204000	USD
	us-gaap	Gains Losses On Sales Of Other Assets GainsLossesOnSalesOfOtherAssets	0	USD
	us-gaap	Gains Losses On Sales Of Other Assets GainsLossesOnSalesOfOtherAssets	224000	USD
CY2010Q3	us-gaap	Gains Losses On Sales Of Other Assets GainsLossesOnSalesOfOtherAssets	0	USD
CY2011Q3	us-gaap	Gains Losses On Sales Of Other Assets GainsLossesOnSalesOfOtherAssets	0	USD
CY2011Q3	us-gaap	Goodwill Goodwill	90581000	USD
CY2010Q4	us-gaap	Goodwill Goodwill	90581000	USD
CY2011Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	114778000	USD
CY2010Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	115995000	USD
CY2010Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	115995000	USD
CY2011Q3	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	114778000	USD
CY2010Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	122158000	USD
CY2011Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	132505000	USD
CY2010Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	1129000	USD
CY2011Q3	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	0	USD
CY2010Q4	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	7292000	USD
CY2011Q3	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	17727000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-30879000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	15290000	USD
CY2010Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27631000	USD
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20176000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	91485000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	105040000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	80113000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	42797000	USD
CY2010Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	23605000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	238000	USD
CY2011Q3	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	2863000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-4265000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	12303000	USD
	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	-122447000	USD
	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	-56129000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-27137000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-19655000	USD
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	45531000	USD
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	20819000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	16858000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	8649000	USD
	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	-250393000	USD
	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	-7371000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	19716000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-13516000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-34425000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-46965000	USD
	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	71036000	USD
	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-41626000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	111411000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	21559000	USD
	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	59663000	USD
	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-16780000	USD
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	2630000	USD
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	40156000	USD
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	117685000	USD
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	44694000	USD
	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	7477000	USD
	us-gaap	Increase Decrease In Trading Liabilities IncreaseDecreaseInTradingLiabilities	-78009000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	6426000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-31309000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	264681000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	72580000	USD
CY2011Q3	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	22279000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	69487000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	64050000	USD
CY2010Q3	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	22175000	USD
CY2011Q3	us-gaap	Interest Expense InterestExpense	28068000	USD
	us-gaap	Interest Expense InterestExpense	78780000	USD
CY2010Q3	us-gaap	Interest Expense InterestExpense	26725000	USD
	us-gaap	Interest Expense InterestExpense	84317000	USD
	us-gaap	Interest Paid InterestPaid	100840000	USD
	us-gaap	Interest Paid InterestPaid	92531000	USD
	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	395310000	USD
CY2010Q3	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	119947000	USD
	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	411866000	USD
CY2011Q3	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	114729000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	2605000	USD
CY2011Q3	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	666000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	2875000	USD
CY2010Q3	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	804000	USD
CY2010Q4	us-gaap	Investments Investments	12995393000	USD
CY2011Q3	us-gaap	Investments Investments	13293812000	USD
CY2010Q4	us-gaap	Liabilities Liabilities	13818691000	USD
CY2011Q3	us-gaap	Liabilities Liabilities	14461013000	USD
CY2010Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	17528547000	USD
CY2011Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	18330821000	USD
CY2010Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9016549000	USD
CY2011Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	9261584000	USD
CY2010Q4	us-gaap	Marketable Securities Fixed Maturities MarketableSecuritiesFixedMaturities	11209154000	USD
CY2011Q3	us-gaap	Marketable Securities Fixed Maturities MarketableSecuritiesFixedMaturities	11230770000	USD
	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	400000	USD
CY2011Q3	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	0	USD
	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	3705000	USD
CY2010Q3	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	1123000	USD
CY2010Q4	us-gaap	Minority Interest MinorityInterest	6980000	USD
CY2011Q3	us-gaap	Minority Interest MinorityInterest	7415000	USD
CY2011Q3	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	283560000	USD
CY2010Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	353583000	USD
CY2011Q3	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	265998000	USD
CY2010Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	312515000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-179038000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-204930000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	221481000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-83473000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	390717000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	485243000	USD
	us-gaap	Net Income Loss NetIncomeLoss	276877000	USD
	us-gaap	Net Income Loss NetIncomeLoss	322436000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	77308000	USD
CY2010Q3	us-gaap	Net Income Loss NetIncomeLoss	93619000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-98000	USD
CY2010Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding		shares
CY2010Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	50000	USD
CY2011Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-39000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	409261000	USD
CY2011Q3	us-gaap	Net Investment Income NetInvestmentIncome	114063000	USD
CY2010Q3	us-gaap	Net Investment Income NetInvestmentIncome	119143000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	392435000	USD
CY2010Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	1054812000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	3065013000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	3416767000	USD
CY2011Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	1182286000	USD
CY2011Q3	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	350964	USD
CY2011Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	1553208	USD
CY2011Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	1507969	USD
CY2011Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	1464047	USD
CY2011Q3	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	1421405	USD
CY2011Q3	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	340365393	USD
CY2010Q4	us-gaap	Other Assets OtherAssets	198963000	USD
CY2011Q3	us-gaap	Other Assets OtherAssets	190526000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	3000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-1000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	11000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	11000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	707000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	2118000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	561000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	1681000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	-30957000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	17985000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	765000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	-21104000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	-5003000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	140511000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	233698000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	59189000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	125085000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	125329000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	39031000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	245908000	USD
CY2010Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	369217000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1193040000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1108007000	USD
CY2011Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	405850000	USD
	us-gaap	Other Income OtherIncome	1364000	USD
	us-gaap	Other Income OtherIncome	1118000	USD
CY2011Q3	us-gaap	Other Income OtherIncome	406000	USD
CY2010Q3	us-gaap	Other Income OtherIncome	310000	USD
CY2011Q3	us-gaap	Other Liabilities OtherLiabilities	924667000	USD
CY2010Q4	us-gaap	Other Liabilities OtherLiabilities	836001000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2011Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2010Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2010Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	5661000	USD
CY2010Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	5661000	USD
CY2011Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	4261000	USD
CY2010Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	4261000	USD
CY2011Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	4261000	USD
CY2009Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	5661000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-22251000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-71803000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	177648000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	319293000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	32272000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	30947000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	123623000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	49932000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	8579000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	45151000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	180122000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	37405000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	36688000	USD
	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	347602000	USD
	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	0	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1965351000	USD
CY2011Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	683980000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1718355000	USD
CY2010Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	597907000	USD
CY2011Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2010Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2011Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2010Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2011Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued		shares
CY2010Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued		shares
CY2011Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding		shares
CY2010Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2011Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2010Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1087208000	USD
CY2011Q3	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1195018000	USD
CY2010Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	967297000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	2845986000	USD
CY2011Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	1055823000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	3055564000	USD
CY2011Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	1126139000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	3266857000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	2932010000	USD
CY2010Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	986706000	USD
CY2010Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	215816000	USD
CY2011Q3	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	275479000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	305637000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	309000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	558000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-236000	USD
	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-165160000	USD
	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	112760000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	79344000	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	26643000	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	31585000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	13757000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4720000	USD
	us-gaap	Profit Loss ProfitLoss	276779000	USD
CY2010Q3	us-gaap	Profit Loss ProfitLoss	93669000	USD
	us-gaap	Profit Loss ProfitLoss	322674000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	77269000	USD
CY2011Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	263689000	USD
CY2010Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	254720000	USD
CY2011Q3	us-gaap	Real Estate Investments RealEstateInvestments	346015000	USD
CY2010Q4	us-gaap	Real Estate Investments RealEstateInvestments	0	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	73412000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	22650000	USD
CY2011Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	134027000	USD
CY2010Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	88928000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	329139000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	315580000	USD
CY2011Q3	us-gaap	Reinsurance Payable ReinsurancePayable	254117000	USD
CY2010Q4	us-gaap	Reinsurance Payable ReinsurancePayable	215723000	USD
CY2011Q3	us-gaap	Trading Account Assets Fair Value Disclosure TradingAccountAssetsFairValueDisclosure	380887000	USD
CY2010Q4	us-gaap	Trading Account Assets Fair Value Disclosure TradingAccountAssetsFairValueDisclosure	339235000	USD
CY2011Q3	us-gaap	Trading Liabilities TradingLiabilities	60973000	USD
CY2010Q4	us-gaap	Trading Liabilities TradingLiabilities	53494000	USD
CY2011Q3	us-gaap	Trading Liabilities Fair Value Disclosure TradingLiabilitiesFairValueDisclosure	60973000	USD
CY2010Q4	us-gaap	Trading Liabilities Fair Value Disclosure TradingLiabilitiesFairValueDisclosure	53494000	USD
CY2011Q3	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1187344000	USD
CY2010Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1070256000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	8300000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	600000	USD
CY2011Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4439287000	USD
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CY2011Q3	us-gaap	Revenues Revenues	1279731000	USD
CY2010Q3	us-gaap	Revenues Revenues	1176112000	USD
	us-gaap	Revenues Revenues	3492727000	USD
	us-gaap	Revenues Revenues	3785031000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	19727000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	20357000	USD
CY2011Q3	us-gaap	Stockholders Equity StockholdersEquity	3862393000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	3702876000	USD
CY2011Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3869808000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3709856000	USD
CY2010Q4	us-gaap	Subordinated Debt SubordinatedDebt	242784000	USD
CY2011Q3	us-gaap	Subordinated Debt SubordinatedDebt	242945000	USD
CY2010Q4	us-gaap	Trading Securities TradingSecurities	359192000	USD
CY2011Q3	us-gaap	Trading Securities TradingSecurities	327883000	USD
CY2010Q4	us-gaap	Trading Securities Fair Value Disclosure TradingSecuritiesFairValueDisclosure	359192000	USD
CY2011Q3	us-gaap	Trading Securities Fair Value Disclosure TradingSecuritiesFairValueDisclosure	327883000	USD
CY2010Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	94108084	shares
CY2011Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	98035822	shares
CY2010Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1750494000	USD
CY2011Q3	us-gaap	Treasury Stock Value TreasuryStockValue	1887007000	USD
CY2011Q3	us-gaap	Unearned Premiums UnearnedPremiums	2214954000	USD
CY2010Q4	us-gaap	Unearned Premiums UnearnedPremiums	1953721000	USD
CY2010Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	154160000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	144538000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	146553000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	157054000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	138816000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	140535000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	150556000	shares
CY2010Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	147079000	shares
	wrb	Accrual Of Interest On Loan Discontinued AccrualOfInterestOnLoanDiscontinued	90
CY2011Q3	wrb	Aggregate Amortized Cost Of Seven Largest Loans AggregateAmortizedCostOfSevenLargestLoans	208000000	USD
CY2011Q3	wrb	Aggregate Fair Value Of Seven Largest Loans AggregateFairValueOfSevenLargestLoans	188000000	USD
CY2011Q3	wrb	Assumed Premiums Earned AssumedPremiumsEarned	165208000	USD
CY2010Q3	wrb	Assumed Premiums Earned AssumedPremiumsEarned	162783000	USD
	wrb	Assumed Premiums Earned AssumedPremiumsEarned	482628000	USD
	wrb	Assumed Premiums Earned AssumedPremiumsEarned	489020000	USD
CY2011Q3	wrb	Available For Sale Equity Securities Fair Value AvailableForSaleEquitySecuritiesFairValue	438465000	USD
CY2010Q4	wrb	Available For Sale Equity Securities Fair Value AvailableForSaleEquitySecuritiesFairValue	561053000	USD
CY2010Q4	wrb	Available For Sale Equity Securities Gross Unrealized Gains AvailableForSaleEquitySecuritiesGrossUnrealizedGains	168482000	USD
CY2011Q3	wrb	Available For Sale Equity Securities Gross Unrealized Gains AvailableForSaleEquitySecuritiesGrossUnrealizedGains	124409000	USD
CY2010Q4	wrb	Available For Sale Equity Securities Gross Unrealized Losses AvailableForSaleEquitySecuritiesGrossUnrealizedLosses	11664000	USD
CY2011Q3	wrb	Available For Sale Equity Securities Gross Unrealized Losses AvailableForSaleEquitySecuritiesGrossUnrealizedLosses	27351000	USD
	wrb	Available For Sale Equity Securities Net Realized Gain Loss Excluding Other Than Temporary Impairments AvailableForSaleEquitySecuritiesNetRealizedGainLossExcludingOtherThanTemporaryImpairments	3765000	USD
	wrb	Available For Sale Equity Securities Net Realized Gain Loss Excluding Other Than Temporary Impairments AvailableForSaleEquitySecuritiesNetRealizedGainLossExcludingOtherThanTemporaryImpairments	50539000	USD
CY2010Q3	wrb	Available For Sale Equity Securities Net Realized Gain Loss Excluding Other Than Temporary Impairments AvailableForSaleEquitySecuritiesNetRealizedGainLossExcludingOtherThanTemporaryImpairments	2974000	USD
CY2011Q3	wrb	Available For Sale Equity Securities Net Realized Gain Loss Excluding Other Than Temporary Impairments AvailableForSaleEquitySecuritiesNetRealizedGainLossExcludingOtherThanTemporaryImpairments	12318000	USD
CY2010Q4	wrb	Available For Sale Securities Debt Securities Fair Value AvailableForSaleSecuritiesDebtSecuritiesFairValue	11093159000	USD
CY2011Q3	wrb	Available For Sale Securities Debt Securities Fair Value AvailableForSaleSecuritiesDebtSecuritiesFairValue	11115992000	USD
CY2011Q3	wrb	Available For Sale Securities Debt Securities Gross Unrealized Gain AvailableForSaleSecuritiesDebtSecuritiesGrossUnrealizedGain	610102000	USD
CY2010Q4	wrb	Available For Sale Securities Debt Securities Gross Unrealized Gain AvailableForSaleSecuritiesDebtSecuritiesGrossUnrealizedGain	449840000	USD
CY2010Q4	wrb	Available For Sale Securities Debt Securities Gross Unrealized Losses AvailableForSaleSecuritiesDebtSecuritiesGrossUnrealizedLosses	93879000	USD
CY2011Q3	wrb	Available For Sale Securities Debt Securities Gross Unrealized Losses AvailableForSaleSecuritiesDebtSecuritiesGrossUnrealizedLosses	72573000	USD
	wrb	Ceded Premiums Earned CededPremiumsEarned	496866000	USD
CY2011Q3	wrb	Ceded Premiums Earned CededPremiumsEarned	179664000	USD
	wrb	Ceded Premiums Earned CededPremiumsEarned	415686000	USD
CY2010Q3	wrb	Ceded Premiums Earned CededPremiumsEarned	142800000	USD
CY2011Q3	wrb	Change In Net Unearned Premiums ChangeInNetUnearnedPremiums	70316000	USD
	wrb	Change In Net Unearned Premiums ChangeInNetUnearnedPremiums	211293000	USD
	wrb	Change In Net Unearned Premiums ChangeInNetUnearnedPremiums	86024000	USD
CY2010Q3	wrb	Change In Net Unearned Premiums ChangeInNetUnearnedPremiums	19409000	USD
CY2011Q3	wrb	Debt Service Coverage Ratio DebtServiceCoverageRatio	1.5
	wrb	Direct Premiums Earned DirectPremiumsEarned	3063410000	USD
CY2011Q3	wrb	Direct Premiums Earned DirectPremiumsEarned	1070279000	USD
CY2010Q3	wrb	Direct Premiums Earned DirectPremiumsEarned	947314000	USD
	wrb	Direct Premiums Earned DirectPremiumsEarned	2779044000	USD
CY2011Q3	wrb	Due To Broker DueToBroker	127792000	USD
CY2010Q4	wrb	Due To Broker DueToBroker	5318000	USD
CY2010Q4	wrb	Due To Broker Fair Value DueToBrokerFairValue	5318000	USD
CY2011Q3	wrb	Due To Broker Fair Value DueToBrokerFairValue	127792000	USD
CY2011Q3	wrb	Expenses From Wholly Owned Investees ExpensesFromWhollyOwnedInvestees	64388000	USD
CY2010Q3	wrb	Expenses From Wholly Owned Investees ExpensesFromWhollyOwnedInvestees	60963000	USD
	wrb	Expenses From Wholly Owned Investees ExpensesFromWhollyOwnedInvestees	159871000	USD
	wrb	Expenses From Wholly Owned Investees ExpensesFromWhollyOwnedInvestees	174059000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities After Five Through Ten Years Fair Value MarketableSecuritiesFixedMaturitiesAfterFiveThroughTenYearsFairValue	2748995000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities After One Through Five Years Amortized Cost MarketableSecuritiesFixedMaturitiesAfterOneThroughFiveYearsAmortizedCost	3220365000	USD
CY2011Q3	wrb	Income Before Income Taxes IncomeBeforeIncomeTaxes	97445000	USD
	wrb	Income Before Income Taxes IncomeBeforeIncomeTaxes	368264000	USD
CY2010Q3	wrb	Income Before Income Taxes IncomeBeforeIncomeTaxes	121300000	USD
	wrb	Income Before Income Taxes IncomeBeforeIncomeTaxes	427714000	USD
	wrb	Income Tax Expense On Realized Investment Gains Losses IncomeTaxExpenseOnRealizedInvestmentGainsLosses	26502000	USD
CY2011Q3	wrb	Income Tax Expense On Realized Investment Gains Losses IncomeTaxExpenseOnRealizedInvestmentGainsLosses	7454000	USD
	wrb	Income Tax Expense On Realized Investment Gains Losses IncomeTaxExpenseOnRealizedInvestmentGainsLosses	7994000	USD
CY2010Q3	wrb	Income Tax Expense On Realized Investment Gains Losses IncomeTaxExpenseOnRealizedInvestmentGainsLosses	1840000	USD
	wrb	Increase Decrease In Investment In Arbitrage Funds IncreaseDecreaseInInvestmentInArbitrageFunds	-4054000	USD
	wrb	Increase Decrease In Investment In Arbitrage Funds IncreaseDecreaseInInvestmentInArbitrageFunds	-23293000	USD
CY2011Q3	wrb	Investment In Arbitrage Funds InvestmentInArbitrageFunds	56606000	USD
CY2010Q4	wrb	Investment In Arbitrage Funds InvestmentInArbitrageFunds	60660000	USD
CY2010Q4	wrb	Investment In Arbitrage Funds Fair Value InvestmentInArbitrageFundsFairValue	60660000	USD
CY2011Q3	wrb	Investment In Arbitrage Funds Fair Value InvestmentInArbitrageFundsFairValue	56606000	USD
CY2010Q4	wrb	Loans With Specific Valuation Allowance LoansWithSpecificValuationAllowance	31855000	USD
CY2011Q3	wrb	Loans With Specific Valuation Allowance LoansWithSpecificValuationAllowance	29268000	USD
CY2010Q4	wrb	Marketable Securities Continuous Unrealized Loss Position Aggregate Loss MarketableSecuritiesContinuousUnrealizedLossPositionAggregateLoss	106672000	USD
CY2011Q3	wrb	Marketable Securities Continuous Unrealized Loss Position Aggregate Loss MarketableSecuritiesContinuousUnrealizedLossPositionAggregateLoss	99924000	USD
CY2011Q3	wrb	Marketable Securities Continuous Unrealized Loss Position Fair Value MarketableSecuritiesContinuousUnrealizedLossPositionFairValue	1534536000	USD
CY2010Q4	wrb	Marketable Securities Continuous Unrealized Loss Position Fair Value MarketableSecuritiesContinuousUnrealizedLossPositionFairValue	2236550000	USD
CY2010Q4	wrb	Marketable Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Loss MarketableSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLoss	40632000	USD
CY2011Q3	wrb	Marketable Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Loss MarketableSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLoss	32233000	USD
CY2011Q3	wrb	Marketable Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value MarketableSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1048422000	USD
CY2010Q4	wrb	Marketable Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value MarketableSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1666648000	USD
CY2010Q4	wrb	Marketable Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Loss MarketableSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLoss	66040000	USD
CY2011Q3	wrb	Marketable Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Loss MarketableSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLoss	67691000	USD
CY2010Q4	wrb	Marketable Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value MarketableSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	569902000	USD
CY2011Q3	wrb	Marketable Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value MarketableSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	486114000	USD
CY2011Q3	wrb	Marketable Securities Debt Maturities Without Single Maturity Date Amortized Cost MarketableSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	1473880000	USD
CY2011Q3	wrb	Marketable Securities Debt Maturities Without Single Maturity Date Fair Value MarketableSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	1544848000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities After Five Through Ten Years Amortized Cost MarketableSecuritiesFixedMaturitiesAfterFiveThroughTenYearsAmortizedCost	2552147000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities After One Through Five Years Fair Value MarketableSecuritiesFixedMaturitiesAfterOneThroughFiveYearsFairValue	3373391000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities After Ten Years Amortized Cost MarketableSecuritiesFixedMaturitiesAfterTenYearsAmortizedCost	2739124000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities After Ten Years Fair Value MarketableSecuritiesFixedMaturitiesAfterTenYearsFairValue	2862575000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Amortized Cost MarketableSecuritiesFixedMaturitiesAmortizedCost	10693241000	USD
CY2010Q4	wrb	Marketable Securities Fixed Maturities Amortized Cost MarketableSecuritiesFixedMaturitiesAmortizedCost	10853193000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Fair Value MarketableSecuritiesFixedMaturitiesFairValue	11248497000	USD
CY2010Q4	wrb	Marketable Securities Fixed Maturities Fair Value MarketableSecuritiesFixedMaturitiesFairValue	11215317000	USD
	wrb	Marketable Securities Fixed Maturities Gross Realized Gains MarketableSecuritiesFixedMaturitiesGrossRealizedGains	27519000	USD
	wrb	Marketable Securities Fixed Maturities Gross Realized Gains MarketableSecuritiesFixedMaturitiesGrossRealizedGains	25049000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Gross Realized Gains MarketableSecuritiesFixedMaturitiesGrossRealizedGains	10212000	USD
CY2010Q3	wrb	Marketable Securities Fixed Maturities Gross Realized Gains MarketableSecuritiesFixedMaturitiesGrossRealizedGains	5669000	USD
	wrb	Marketable Securities Fixed Maturities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesFixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	4716000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesFixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	2207000	USD
CY2010Q3	wrb	Marketable Securities Fixed Maturities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesFixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	2956000	USD
	wrb	Marketable Securities Fixed Maturities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesFixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	6214000	USD
CY2010Q4	wrb	Marketable Securities Fixed Maturities Gross Unrealized Gains MarketableSecuritiesFixedMaturitiesGrossUnrealizedGains	457132000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Gross Unrealized Gains MarketableSecuritiesFixedMaturitiesGrossUnrealizedGains	627829000	USD
CY2010Q4	wrb	Marketable Securities Fixed Maturities Gross Unrealized Losses MarketableSecuritiesFixedMaturitiesGrossUnrealizedLosses	95008000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Gross Unrealized Losses MarketableSecuritiesFixedMaturitiesGrossUnrealizedLosses	72573000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Non Investment Grade Unrealized Loss Position Aggregate Losses MarketableSecuritiesFixedMaturitiesNonInvestmentGradeUnrealizedLossPositionAggregateLosses	20450000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Non Investment Grade Unrealized Loss Position Fair Value MarketableSecuritiesFixedMaturitiesNonInvestmentGradeUnrealizedLossPositionFairValue	227512000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Within One Year Amortized Cost MarketableSecuritiesFixedMaturitiesWithinOneYearAmortizedCost	707725000	USD
CY2011Q3	wrb	Marketable Securities Fixed Maturities Within One Year Fair Value MarketableSecuritiesFixedMaturitiesWithinOneYearFairValue	718688000	USD
CY2011Q3	wrb	Minimum Ownership Of Common Stockholders Equity MinimumOwnershipOfCommonStockholdersEquity	0.10
	wrb	Net Realized Gain Loss On Investment Sales NetRealizedGainLossOnInvestmentSales	73812000	USD
CY2011Q3	wrb	Net Realized Gain Loss On Investment Sales NetRealizedGainLossOnInvestmentSales	21238000	USD
CY2010Q3	wrb	Net Realized Gain Loss On Investment Sales NetRealizedGainLossOnInvestmentSales	6327000	USD
	wrb	Net Realized Gain Loss On Investment Sales NetRealizedGainLossOnInvestmentSales	26355000	USD
CY2011Q3	wrb	Number Of Available For Sale Equity Securities Continuous Unrealized Loss Position NumberOfAvailableForSaleEquitySecuritiesContinuousUnrealizedLossPosition	38
CY2011Q3	wrb	Other Comprehensive Income Reclassification Adjustment For Net Investment Gains Losses Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetInvestmentGainsLossesIncludedInNetIncomeNetOfTax	-13784000	USD
	wrb	Other Comprehensive Income Reclassification Adjustment For Net Investment Gains Losses Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetInvestmentGainsLossesIncludedInNetIncomeNetOfTax	-14656000	USD
	wrb	Other Comprehensive Income Reclassification Adjustment For Net Investment Gains Losses Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetInvestmentGainsLossesIncludedInNetIncomeNetOfTax	-46910000	USD
CY2010Q3	wrb	Other Comprehensive Income Reclassification Adjustment For Net Investment Gains Losses Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetInvestmentGainsLossesIncludedInNetIncomeNetOfTax	-3364000	USD
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2011
CY2011Q3	wrb	Other Revenues OtherRevenues	109845000	USD
CY2010Q3	wrb	Other Revenues OtherRevenues	89672000	USD
	wrb	Other Revenues OtherRevenues	254306000	USD
	wrb	Other Revenues OtherRevenues	320206000	USD
	wrb	Payments Of Fixed Maturity Securities PaymentsOfFixedMaturitySecurities	1944374000	USD
	wrb	Payments Of Fixed Maturity Securities PaymentsOfFixedMaturitySecurities	2118556000	USD
	wrb	Portion Of Impairment Loss Recognized In Transferred From Other Comprehensive Income PortionOfImpairmentLossRecognizedInTransferredFromOtherComprehensiveIncome	0	USD
	wrb	Portion Of Impairment Loss Recognized In Transferred From Other Comprehensive Income PortionOfImpairmentLossRecognizedInTransferredFromOtherComprehensiveIncome	0	USD
CY2011Q3	wrb	Portion Of Impairment Loss Recognized In Transferred From Other Comprehensive Income PortionOfImpairmentLossRecognizedInTransferredFromOtherComprehensiveIncome	0	USD
CY2010Q3	wrb	Portion Of Impairment Loss Recognized In Transferred From Other Comprehensive Income PortionOfImpairmentLossRecognizedInTransferredFromOtherComprehensiveIncome	0	USD
	wrb	Proceeds From Fixed Maturity Securities ProceedsFromFixedMaturitySecurities	1264497000	USD
	wrb	Proceeds From Fixed Maturity Securities ProceedsFromFixedMaturitySecurities	1129377000	USD
	wrb	Proceeds From Maturities Prepayments And Calls Of Fixed Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfFixedMaturitySecurities	922453000	USD
	wrb	Proceeds From Maturities Prepayments And Calls Of Fixed Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfFixedMaturitySecurities	1190751000	USD
CY2011Q1	wrb	Purchase Price Allocated To Loss Reserves PurchasePriceAllocatedToLossReserves	0	USD
	wrb	Realized Investment Gains Losses Net Of Tax RealizedInvestmentGainsLossesNetOfTax	14656000	USD
	wrb	Realized Investment Gains Losses Net Of Tax RealizedInvestmentGainsLossesNetOfTax	46910000	USD
CY2011Q3	wrb	Realized Investment Gains Losses Net Of Tax RealizedInvestmentGainsLossesNetOfTax	13784000	USD
CY2010Q3	wrb	Realized Investment Gains Losses Net Of Tax RealizedInvestmentGainsLossesNetOfTax	3364000	USD
CY2010Q4	wrb	Reinsurance Loss On Uncollectible Accounts On Date Amount ReinsuranceLossOnUncollectibleAccountsOnDateAmount	3000000	USD
CY2011Q3	wrb	Reinsurance Loss On Uncollectible Accounts On Date Amount ReinsuranceLossOnUncollectibleAccountsOnDateAmount	3000000	USD
CY2011Q3	wrb	Revenues From Wholly Owned Investees RevenuesFromWhollyOwnedInvestees	65922000	USD
CY2010Q3	wrb	Revenues From Wholly Owned Investees RevenuesFromWhollyOwnedInvestees	61983000	USD
	wrb	Revenues From Wholly Owned Investees RevenuesFromWhollyOwnedInvestees	166488000	USD
	wrb	Revenues From Wholly Owned Investees RevenuesFromWhollyOwnedInvestees	175943000	USD
CY2011Q3	wrb	Senior Notes And Other Debt SeniorNotesAndOtherDebt	1501773000	USD
CY2010Q4	wrb	Senior Notes And Other Debt SeniorNotesAndOtherDebt	1500419000	USD
CY2011Q3	wrb	Senior Notes And Other Debt Fair Value SeniorNotesAndOtherDebtFairValue	1616634000	USD
CY2010Q4	wrb	Senior Notes And Other Debt Fair Value SeniorNotesAndOtherDebtFairValue	1570057000	USD
CY2010Q4	wrb	Trading Assets TradingAssets	339235000	USD
CY2011Q3	wrb	Trading Assets TradingAssets	380887000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Period End Date DocumentPeriodEndDate	2011-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000011544
CY2011Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	137102059	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	BERKLEY W R CORP

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wrb-20110930.xml	Edgar Link	completed
wrb-20110930.xsd	Edgar Link	pending
wrb-20110930_cal.xml	Edgar Link	unprocessable
wrb-20110930_def.xml	Edgar Link	unprocessable
wrb-20110930_lab.xml	Edgar Link	unprocessable
wrb-20110930_pre.xml	Edgar Link	unprocessable
wrb930201110q.htm	Edgar Link	pending
wrb9302011ex311.htm	Edgar Link	pending
wrb9302011ex312.htm	Edgar Link	pending
wrb9302011ex321.htm	Edgar Link	pending

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$WRB
BERKLEY W R CORP Stock $wrb

2011 Q4 Form 10-Q Financial Statement

#000001154411000048 Filed on November 07, 2011

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WRB BERKLEY W R CORP Stock $wrb

2011 Q4 Form 10-Q Financial Statement

#000001154411000048 Filed on November 07, 2011

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WRB
BERKLEY W R CORP Stock $wrb