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Fair Value of Financial Instruments - Financial Instruments Not Measured at Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value of Financial Instruments |  |
Receivable from brokers and dealers and clearing organizations | $ 1,646 | $ 0
Deposits with clearing organizations | 25,990 | 20,523
Accounts receivable | 155,426 | 129,937
Total assets | 5,989,538 | 5,990,180
Payable to brokers and dealers and clearing organizations | 1,644 | 0
Total liabilities | 618,770 | 681,237
Equity investment without readily determinable fair values | 21,000 | 21,100
Fair Value, Nonrecurring |  |
Fair Value of Financial Instruments |  |
Cash and restricted cash | 235,577 | 318,495
Receivable from brokers and dealers and clearing organizations | 1,646 | 0
Deposits with clearing organizations | 25,990 | 20,523
Accounts receivable | 155,426 | 129,937
Other assets – Memberships in clearing organizations | 2,410 | 2,392
Total assets | 421,049 | 471,347
Payable to brokers and dealers and clearing organizations | 1,644 | 0
Total liabilities | 1,644 | 0
Quoted Prices in active Markets for Identical Assets (Level 1) | Fair Value, Nonrecurring |  |
Fair Value of Financial Instruments |  |
Cash and restricted cash | 235,577 | 318,495
Receivable from brokers and dealers and clearing organizations | 0 | 0
Deposits with clearing organizations | 25,990 | 20,523
Accounts receivable | 0 | 0
Other assets – Memberships in clearing organizations | 0 | 0
Total assets | 261,567 | 339,018
Payable to brokers and dealers and clearing organizations | 0 | 0
Total liabilities | 0 | 0
Significant Observable Inputs (Level 2) | Fair Value, Nonrecurring |  |
Fair Value of Financial Instruments |  |
Cash and restricted cash | 0 | 0
Receivable from brokers and dealers and clearing organizations | 1,646 | 0
Deposits with clearing organizations | 0 | 0
Accounts receivable | 155,426 | 129,937
Other assets – Memberships in clearing organizations | 0 | 0
Total assets | 157,072 | 129,937
Payable to brokers and dealers and clearing organizations | 1,644 | 0
Total liabilities | 1,644 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring |  |
Fair Value of Financial Instruments |  |
Cash and restricted cash | 0 | 0
Receivable from brokers and dealers and clearing organizations | 0 | 0
Deposits with clearing organizations | 0 | 0
Accounts receivable | 0 | 0
Other assets – Memberships in clearing organizations | 2,410 | 2,392
Total assets | 2,410 | 2,392
Payable to brokers and dealers and clearing organizations | 0 | 0
Total liabilities | 0 | 0
Total Fair Value | Fair Value, Nonrecurring |  |
Fair Value of Financial Instruments |  |
Cash and restricted cash | 235,577 | 318,495
Receivable from brokers and dealers and clearing organizations | 1,646 | 0
Deposits with clearing organizations | 25,990 | 20,523
Accounts receivable | 155,426 | 129,937
Other assets – Memberships in clearing organizations | 2,410 | 2,392
Total assets | 421,049 | 471,347
Payable to brokers and dealers and clearing organizations | 1,644 | 0
Total liabilities | $ 1,644 | $ 0

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- Definition Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. 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