001 - Document - Document and Entity Information link:presentationLink link:definitionLink link:calculationLink 002 - Statement - Consolidated Condensed Balance Sheets link:presentationLink link:definitionLink link:calculationLink 003 - Statement - Consolidated Condensed Balance Sheets (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 004 - Statement - Consolidated Condensed Statements of Income (unaudited) link:presentationLink link:definitionLink link:calculationLink 005 - Statement - Consolidated Condensed Statements of Comprehensive Income (unaudited) link:presentationLink link:definitionLink link:calculationLink 006 - Statement - Consolidated Condensed Statements of Cash Flows (unaudited) link:presentationLink link:definitionLink link:calculationLink 007 - Statement - Consolidated Condensed Statement of Changes in Shareholders' Equity (unaudited) link:presentationLink link:definitionLink link:calculationLink 008 - Statement - Consolidated Condensed Statement of Changes in Shareholders' Equity (unaudited) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 009 - Disclosure - Organization and Summary of Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 010 - Disclosure - Investments link:presentationLink link:definitionLink link:calculationLink 011 - Disclosure - Variable Interest Entity link:presentationLink link:definitionLink link:calculationLink 012 - Disclosure - Supplementary Cash Flow Information link:presentationLink link:definitionLink link:calculationLink 013 - Disclosure - Employees' Profit Sharing and Savings Plan link:presentationLink link:definitionLink link:calculationLink 014 - Disclosure - Comprehensive Income link:presentationLink link:definitionLink link:calculationLink 015 - Disclosure - Related Party Transactions link:presentationLink link:definitionLink link:calculationLink 016 - Disclosure - Federal, State and Local Income Taxes link:presentationLink link:definitionLink link:calculationLink 017 - Disclosure - Property and Equipment link:presentationLink link:definitionLink link:calculationLink 018 - Disclosure - Accounting for the Costs of Computer Software Developed for Internal Use link:presentationLink link:definitionLink link:calculationLink 019 - Disclosure - Treasury Stock and Repurchase Program link:presentationLink link:definitionLink link:calculationLink 020 - Disclosure - Lease Commitments link:presentationLink link:definitionLink link:calculationLink 021 - Disclosure - Organization and Summary of Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 022 - Disclosure - Organization and Summary of Significant Accounting Policies (Tables) link:presentationLink link:definitionLink link:calculationLink 023 - Disclosure - Investments (Tables) link:presentationLink link:definitionLink link:calculationLink 024 - Disclosure - Variable Interest Entity (Tables) link:presentationLink link:definitionLink link:calculationLink 025 - Disclosure - Supplementary Cash Flow Information (Tables) link:presentationLink link:definitionLink link:calculationLink 026 - Disclosure - Comprehensive Income (Tables) link:presentationLink link:definitionLink link:calculationLink 027 - Disclosure - Related Party Transactions (Tables) link:presentationLink link:definitionLink link:calculationLink 028 - Disclosure - Federal, State and Local Income Taxes (Tables) link:presentationLink link:definitionLink link:calculationLink 029 - Disclosure - Property and Equipment (Tables) link:presentationLink link:definitionLink link:calculationLink 030 - Disclosure - Treasury Stock and Repurchase Program (Tables) link:presentationLink link:definitionLink link:calculationLink 031 - Disclosure - Lease Commitments (Tables) link:presentationLink link:definitionLink link:calculationLink 032 - Disclosure - Organization and Summary of Significant Accounting Policies (Details) link:presentationLink link:definitionLink link:calculationLink 033 - Disclosure - Organization and Summary of Significant Accounting Policies (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 034 - Disclosure - Investments - Carrying value and fair value of securities available-for-sale (Details) link:presentationLink link:definitionLink link:calculationLink 035 - Disclosure - Investments - Composition of income from securities transactions (Details 1) link:presentationLink link:definitionLink link:calculationLink 036 - Disclosure - Investments - Components of EAM's investment management operations (Details 2) link:presentationLink link:definitionLink link:calculationLink 037 - Disclosure - Investments - Components of assets and liabilities (Details 3) link:presentationLink link:definitionLink link:calculationLink 038 - Disclosure - Investments (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 039 - Disclosure - Investments - Equity Method Investment (Detail Textuals 1) link:presentationLink link:definitionLink link:calculationLink 040 - Disclosure - Variable Interest Entity (Details) link:presentationLink link:definitionLink link:calculationLink 041 - Disclosure - Variable Interest Entity (Detail textuals) link:presentationLink link:definitionLink link:calculationLink 042 - Disclosure - Supplementary Cash Flow Information (Details) link:presentationLink link:definitionLink link:calculationLink 043 - Disclosure - Employees' Profit Sharing and Savings Plan (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 044 - Disclosure - Comprehensive Income (Details) link:presentationLink link:definitionLink link:calculationLink 045 - Disclosure - Related Party Transactions - Income from its non-voting revenues interest and its non-voting profits interests in EAM (Details) link:presentationLink link:definitionLink link:calculationLink 046 - Disclosure - Related Party Transactions (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 048 - Disclosure - Federal, State and Local Income Taxes - Provision for income taxes (Details) link:presentationLink link:definitionLink link:calculationLink 049 - Disclosure - Federal, State and Local Income Taxes - Tax effect of temporary differences in deferred tax asset and deferred tax liability (Details 1) link:presentationLink link:definitionLink link:calculationLink 050 - Disclosure - Federal, State and Local Income Taxes - Provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. statutory income tax rate (Details 2) link:presentationLink link:definitionLink link:calculationLink 051 - Disclosure - Federal, State and Local Income Taxes (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 052 - Disclosure - Property and Equipment (Details) link:presentationLink link:definitionLink link:calculationLink 053 - Disclosure - Accounting for the Costs of Computer Software Developed for Internal Use (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 054 - Disclosure - Treasury Stock and Repurchase Program (Details) link:presentationLink link:definitionLink link:calculationLink 055 - Disclosure - Treasury Stock and Repurchase Program (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 056 - Disclosure - Lease Commitments - Future minimum payments under operating lease (Details) link:presentationLink link:definitionLink link:calculationLink 057 - Disclosure - Lease Commitments (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 047 - Disclosure - Related Party Transactions (Detail Textuals 1) link:presentationLink link:definitionLink link:calculationLink