0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - BUSINESS COMBINATIONS link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - REVENUES link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - ALLOWANCE FOR CREDIT LOSSES link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - SECURITIES BORROWING AND LENDING link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - FINANCING ACTIVITIES AND OFF-BALANCE SHEET RISK link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - NET INCOME PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - COMMITMENTS & CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - BUSINESS COMBINATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - REVENUES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - SECURITIES BORROWING AND LENDING (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - NET INCOME PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - BUSINESS COMBINATIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - BUSINESS COMBINATIONS - Schedule of Acquisition Date Fair Value of Consideration Transferred (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - BUSINESS COMBINATIONS - Schedule of Components of Identifiable Intangible Assets Acquired (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF MOVEMENT ON GOODWILL (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Components of Finite-Lived Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Components of Finite-Lived Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Future Amortization Expenses In Acquired In Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - REVENUES - Schedule of Revenue Disaggregated by Revenue Source (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - REVENUES - Schedule of Interest Revenue Earned and Interest Expense Paid from Fully-paid Securities Lending (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - REVENUES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - REVENUES - Schedule of Contract Receivables and Liabilities Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses of Brokerage Related (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Schedule of Expected Credit Loss of Accounts Payable (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses of Receivables From Users (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Credit Card Receivable Aging Analysis (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Credit Quality Indicators (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT - Schedule of Held-to-Maturity Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT -Schedule of Amortized Cost and Fair Value of Held-to-Maturity Investments by Contractual Maturity Date (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENT - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - SECURITIES BORROWING AND LENDING - Schedule of Assets and Liabilities Subject to Master Netting Arrangements (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - SECURITIES BORROWING AND LENDING - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - FINANCING ACTIVITIES AND OFF-BALANCE SHEET RISK (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY - Schedule of Activity Related to Time-Based and TradePMR RSUs (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY - Schedule of Share-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - NET INCOME PER SHARE - Schedule of Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - NET INCOME PER SHARE - Schedule of Potential Common Shares Excluded from the Calculation of Diluted EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - LEASES - Schedule of Assets and Liabilities Lessee (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - LEASES - Schedule of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - COMMITMENTS & CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink