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Capital Requirements (Details) - USD ($) | Jan. 02, 2025 | Dec. 31, 2024 | Jan. 02, 2024 | Dec. 31, 2023
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Capital Requirements [Line Items] |  |  |  |
Net capital |  | $ 1,000,000 |  |
Percentage of aggregate debit balance to net capital |  | 2.00% |  |
Cash |  | $ 204,587,000 |  | $ 274,317,000
Securities |  | 68,800,000 |  | 115,500,000
Excess deposit requirements amount |  | 1,200,000 |  | 1,000,000
MSCO [Member] |  |  |  |
Capital Requirements [Line Items] |  |  |  |
Net capital |  | $ 63,900,000 |  | $ 56,100,000
Percentage of aggregate debit balance to net capital |  | 65.84% |  | 63.42%
Net capital excess required |  | $ 62,000,000 |  | $ 54,300,000
Required net capital |  | 1,900,000 |  | 1,800,000
Cash and securities deposits |  | 203,300,000 |  | 273,100,000
Cash |  | 134,500,000 |  | 157,600,000
Cash deposits in excess of minimum requirement |  | 9,500,000 | $ 3,200,000 | 26,200,000
Excess deposit requirements amount |  | 193,800,000 |  | 246,900,000
Special reserve account |  | 1,300,000 |  | 1,200,000
Reserve account excess amount |  | 100,000 |  | 200,000
RISE [Member] |  |  |  |
Capital Requirements [Line Items] |  |  |  |
Required net capital |  | 250,000 |  | 250,000
Subsequent Event [Member] | MSCO [Member] |  |  |  |
Capital Requirements [Line Items] |  |  |  |
Cash deposits in excess of minimum requirement | $ 1,700,000 |  |  |
Maximum [Member] | RISE [Member] |  |  |  |
Capital Requirements [Line Items] |  |  |  |
Net capital |  | 1,300,000 |  | 1,300,000
Minimum [Member] | RISE [Member] |  |  |  |
Capital Requirements [Line Items] |  |  |  |
Net capital in excess amount |  | $ 1,000,000 |  | $ 1,000,000

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