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Funds Borrowed - Summary of Key Attributes of Various Borrowing Arrangements with Lenders (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Jul. 31, 2020 | Dec. 31, 2019
Notes Payable [Line Items] |  |  |  |
Note Amounts |  |  | $ 25,000,000 |
Average Interest Rate | [1] | 2.37% |  |
Notes Payable to Banks [Member] |  |  |  |
Notes Payable [Line Items] |  |  |  |
Note Amounts |  |  |  | $ 39,583,000
Balance outstanding |  | $ 31,261,000 |  |
Average Interest Rate | [1] | 3.67% |  |
Notes Payable to Banks [Member] | Medallion Financial Corp [Member] |  |  |  |
Notes Payable [Line Items] |  |  |  |
Note Dates |  | Apr. 30, 2011 |  |
Note Dates |  | Aug. 31, 2014 |  |
Maturity Dates |  | Feb. 28, 2021 |  |
Maturity Dates |  | Sep. 30, 2021 |  |
Type | [2] | Term loans and demand notes secured by pledged loans |  |
Note Amounts | [2] |  |  | 19,734,000
Balance outstanding |  | $ 19,734,000 |  |
Payment | [3] | Interest only |  |
Average Interest Rate |  | 3.75% |  |
Notes Payable to Banks [Member] | Medallion Chicago [Member] |  |  |  |
Notes Payable [Line Items] |  |  |  |
Note Dates |  | Nov. 30, 2011 |  |
Note Dates |  | Dec. 31, 2011 |  |
Maturity Dates |  | Feb. 28, 2021 |  |
Type | [4] | Term loans secured by owned Chicago taxi medallions |  |
Note Amounts |  |  |  | 18,449,000
Balance outstanding |  | $ 10,687,000 |  |
Payment |  | $134 of principal & interest paid monthly |  |
Average Interest Rate |  | 3.50% |  |
Notes Payable to Banks [Member] | Medallion Funding [Member] |  |  |  |
Notes Payable [Line Items] |  |  |  |
Note Dates |  | Nov. 30, 2018 |  |
Maturity Dates |  | Dec. 31, 2023 |  |
Type |  | Term loan unsecured |  |
Note Amounts |  |  |  | $ 1,400,000
Balance outstanding |  | $ 840,000 |  |
Payment |  | $70 principal & interest paid quarterly |  |
Average Interest Rate |  | 4.00% |  |
[1] | Weighted average contractual rate as of December 31, 2020.
[2] | One note has an interest rate of Prime, one note has an interest rate of Prime plus 0.50%, one note has a fixed interest rate of 3.75%, one note has an interest rate of LIBOR plus 3.75%, and the other interest rates on these borrowings are LIBOR plus 2%.
[3] | Various agreements call for remittance of all principal received on pledged loans subject to minimum monthly payments ranging from $12 to $85.
[4] | Guaranteed by the Company.

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