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Disclosure - Pension Plan and Postretirement Benefits Other Than Pension - Components of net periodic costs, weighted average assumptions, and expected benefit payments (Details) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - Stockholders' Equity - Other comprehensive income (loss) activity (Details) link:presentationLink link:calculationLink link:definitionLink 41203 - Disclosure - Stockholders' Equity - Reclassifications from accumulated other comprehensive income (loss) and included in net income (Details) link:presentationLink link:calculationLink link:definitionLink 41402 - Disclosure - Uniform Net Capital Rule Requirements - Net capital and aggregated indebtedness information for broker/dealer subsidiaries (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - Rental Expense and Lease Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00205 - Statement - Consolidated Statements of Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00305 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - Consolidated Statement of Stockholders’ Equity link:presentationLink link:calculationLink link:definitionLink 00405 - Statement - Consolidated Statement of Stockholders’ Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - New Accounting Guidance link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Investment Securities link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Goodwill and Identifiable Intangible Assets link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Indebtedness link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Pension Plan and Postretirement Benefits Other Than Pension link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Defined Contribution Plan link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 11401 - 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Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Goodwill and Identifiable Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - Pension Plan and Postretirement Benefits Other Than Pension (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Stockholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 31403 - Disclosure - Uniform Net Capital Rule Requirements (Tables) link:presentationLink link:calculationLink link:definitionLink 31503 - Disclosure - Rental Expense and Lease Commitments (Tables) link:presentationLink link:calculationLink link:definitionLink 31603 - 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