0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - STATEMENTS OF FINANCIAL POSITION link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - STATEMENTS OF FINANCIAL POSITION (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - STATEMENTS OF SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 0000008 - Statement - STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000009 - Statement - STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Nature of Operations link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Revenue link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Fixed Assets link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Borrowing Arrangements link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - Postretirement Benefits link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - Incentive and Deferred Compensation Plans link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - Capital Stock link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - Accumulated Other Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - Related Party link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - Concentrations of Credit Risk link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - Supplementary Data on Cash Flows link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - Fixed Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - Postretirement Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - Incentive and Deferred Compensation Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 0000036 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 0000037 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) link:presentationLink link:calculationLink link:definitionLink 0000038 - Disclosure - Supplementary Data on Cash Flows (Tables) link:presentationLink link:calculationLink link:definitionLink 0000039 - Disclosure - Nature of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - Significant Accounting Policies - Recently Adopted Accounting Standards (Details) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000043 - Disclosure - Revenue - Disaggregation of Revenues By Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 0000044 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 0000045 - Disclosure - Fair Value - Fair Value Measurements on a Recurring Basis by Asset Class and Level of Input (Details) link:presentationLink link:calculationLink link:definitionLink 0000046 - Disclosure - Fair Value - Level 3 Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000047 - Disclosure - Fair Value - Financial Instruments Not Carried at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 0000048 - Disclosure - Investments - Cost and Fair Value, Net of Credit Loss Allowance, of Available-For-Sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 0000049 - Disclosure - Investments - Amortized Cost and Estimated Fair Value, Net of Credit Loss Allowance, of Available-For-Sale Securities by Contractual Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 0000050 - Disclosure - Investments - Available-For-Sale Securities in a Gross Unrealized Loss Position by Length of Time (Details) link:presentationLink link:calculationLink link:definitionLink 0000051 - Disclosure - Investments - Credit Loss Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 0000052 - Disclosure - Investments - Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 0000053 - Disclosure - Investments - Net Realized and Unrealized Investment (Losses) Gains (Details) link:presentationLink link:calculationLink link:definitionLink 0000054 - Disclosure - Investments - Portion of Net Unrealized Gains and Losses Recognized During Reporting Period (Details) link:presentationLink link:calculationLink link:definitionLink 0000055 - Disclosure - Investments - Impairments on Available-For-Sale Securities and Agent Loans (Details) link:presentationLink link:calculationLink link:definitionLink 0000056 - Disclosure - Fixed Assets - Fixed Assets by Category (Details) link:presentationLink link:calculationLink link:definitionLink 0000057 - Disclosure - Fixed Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000058 - Disclosure - Borrowing Arrangements - Term Loan Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 0000059 - Disclosure - Borrowing Arrangements - Bank Line of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 0000060 - Disclosure - Postretirement Benefits - Cost of Pension Plans (Details) link:presentationLink link:calculationLink link:definitionLink 0000061 - Disclosure - Postretirement Benefits - Actuarial Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 0000062 - Disclosure - Postretirement Benefits - Funding Policy/Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 0000063 - Disclosure - Postretirement Benefits - Benefit Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 0000064 - Disclosure - Postretirement Benefits - Projected and Accumulated Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 0000065 - Disclosure - Postretirement Benefits - Pension Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000066 - Disclosure - Postretirement Benefits - Accumulated Other Comprehensive (Income) Loss (Details) link:presentationLink link:calculationLink link:definitionLink 0000067 - Disclosure - Postretirement Benefits - Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 0000068 - Disclosure - Postretirement Benefits - Asset Allocation (Details) link:presentationLink link:calculationLink link:definitionLink 0000069 - Disclosure - Postretirement Benefits - Fair Value Measurement for Pension Plan Assets by Major Category and Level of Input (Details) link:presentationLink link:calculationLink link:definitionLink 0000070 - Disclosure - Postretirement Benefits - Estimated Future Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - Postretirement Benefits - Employee Savings Plan (Details) link:presentationLink link:calculationLink link:definitionLink 0000072 - Disclosure - Incentive and Deferred Compensation Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000073 - Disclosure - Incentive and Deferred Compensation Plans - Table (Details) link:presentationLink link:calculationLink link:definitionLink 0000074 - Disclosure - Income Taxes - Provision for Income Tax (Details) link:presentationLink link:calculationLink link:definitionLink 0000075 - Disclosure - Income Taxes - Reconciliation of Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 0000076 - Disclosure - Income Taxes - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000077 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000078 - Disclosure - Capital Stock - Class A and B Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 0000079 - Disclosure - Capital Stock - Stock Repurchases (Details) link:presentationLink link:calculationLink link:definitionLink 0000080 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 0000081 - Disclosure - Related Party (Details) link:presentationLink link:calculationLink link:definitionLink 0000082 - Disclosure - Concentrations of Credit Risk (Details) link:presentationLink link:calculationLink link:definitionLink 0000083 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 0000084 - Disclosure - Supplementary Data on Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink