00100 - Statement - Consolidated Balance Sheets
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00200 - Statement - Consolidated Statements Of Income
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00300 - Statement - Consolidated Statements Of Comprehensive Income
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00500 - Statement - Consolidated Statements Of Cash Flows
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40202 - Disclosure - Reserves For Claims (Summary Of The Company's Loss Reserves) (Details)
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40302 - Disclosure - Earnings Per Common Share And Share Awards (Computation Of Basic And Diluted Earnings Per Share) (Details)
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40401 - Disclosure - Segment Information (Selected Financial Information About The Company's Operations By Segment) (Details)
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40501 - Disclosure - Retirement Agreements And Other Postretirement Benefits (Details)
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40703 - Disclosure - Investments In Securities (Schedule Of Fixed Maturity Securities) (Details)
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40704 - Disclosure - Investments In Securities (Schedule Of Gross Realized Gains And Losses On Securities) (Details)
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00090 - Document - Document And Entity Information
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00105 - Statement - Consolidated Balance Sheets (Parenthetical)
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00400 - Statement - Consolidated Statements Of Stockholders' Equity
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00405 - Statement - Consolidated Statements Of Stockholders' Equity (Parenthetical)
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00505 - Statement - Consolidated Statements Of Cash Flows (Parenthetical)
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10101 - Disclosure - Basis Of Presentation And Significant Accounting Policies
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10201 - Disclosure - Reserves For Claims
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10301 - Disclosure - Earnings Per Common Share And Share Awards
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10401 - Disclosure - Segment Information
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10501 - Disclosure - Retirement Agreements And Other Postretirement Benefits
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10601 - Disclosure - Fair Value Measurement
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10701 - Disclosure - Investments In Securities
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10801 - Disclosure - Commitments And Contingencies
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10901 - Disclosure - Related Party Transactions
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11001 - Disclosure - Agency Acquisition
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20102 - Disclosure - Basis Of Presentation And Significant Accounting Policies (Policy)
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30203 - Disclosure - Reserves For Claims (Tables)
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30303 - Disclosure - Earnings Per Common Share And Share Awards (Tables)
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30403 - Disclosure - Segment Information (Tables)
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30503 - Disclosure - Retirement Agreements And Other Postretirement Benefits (Tables)
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30603 - Disclosure - Fair Value Measurement (Tables)
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30703 - Disclosure - Investments In Securities (Tables)
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30903 - Disclosure - Related Party Transactions (Tables)
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31003 - Disclosure - Agency Acquisition (Tables)
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40201 - Disclosure - Reserves For Claims (Summary Of Transactions In Reserves For Claims) (Details)
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40301 - Disclosure - Earnings Per Common Share And Share Awards (Narrative) (Details)
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40303 - Disclosure - Earnings Per Common Share And Share Awards (Summary Of Share-Based Award Transactions) (Details)
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40304 - Disclosure - Earnings Per Common Share And Share Awards (Weighted-Average Assumptions Of Fair Values For Stock Appreciation Rights) (Details)
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40601 - Disclosure - Fair Value Measurement (Narrative) (Details)
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40602 - Disclosure - Fair Value Measurement (Schedule Of Assumptions Used To Determine Fair Value) (Details)
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40603 - Disclosure - Fair Value Measurement (Schedule Of Fair Value Assets Measured On Recurring Basis) (Details)
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40604 - Disclosure - Fair Value Measurement (Schedule Of Carrying Value And Fair Value Of Financial Assets Disclosed) (Details)
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40605 - Disclosure - Fair Value Measurement (Schedule Of Fair Value Assets Measured At Unobservable Inputs Reconciliation) (Details)
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40606 - Disclosure - Fair Value Measurement (Reconciliation Of Liabilities Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs (Level 3)) (Details)
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40607 - Disclosure - Fair Value Measurement (Schedule Of Estimated Fair Value Hierarchy Of Investments And Related Impairments Recognized) (Details)
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40701 - Disclosure - Investments In Securities (Narrative) (Details)
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40702 - Disclosure - Investments In Securities (Schedule Of Gross Unrealized Gains And Losses And Amortized Cost For Securities) (Details)
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40705 - Disclosure - Investments In Securities (Schedule Of Unrealized Losses On Investments) (Details)
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40801 - Disclosure - Commitments And Contingencies (Details)
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40901 - Disclosure - Related Party Transactions (Summary Of Approximate Values By Year Found Within Consolidated Balance Sheets) (Details)
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40902 - Disclosure - Related Party Transactions (Summary Of Approximate Values By Year Found Within Consolidated Statements Of Income) (Details)
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41001 - Disclosure - Agency Acquisition (Narrative) (Details)
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41002 - Disclosure - Agency Acquisition (Reconciliation Of Total Redeemable Equity) (Details)
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