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Organization of Medallion Financial Corp. and its Subsidiaries - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($) Medallion	Dec. 31, 2019 USD ($)
Subsidiary or Equity Method Investee [Line Items]
Purchase price for City of Chicago taxi medallions out of foreclosure	$ 8,689,000
Number of medallions purchased out of foreclosure | Medallion	159
Net realizable value of medallions	$ 2,932,000	$ 3,091,000
Medallion Financing Trust I [Member]
Subsidiary or Equity Method Investee [Line Items]
Aggregate assets of trust	$ 36,083,000

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The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

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Amount of reorganization value related to estimated net realizable value of asset dispositions. Reorganization value is the amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

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