Income Taxes - Summary of Components of Deferred and Other Tax Assets and Liabilities (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Income Tax Rate Reconciliation [Line Items]
Valuation allowance	$ 1.8
Medallion Chicago [Member]
Income Tax Rate Reconciliation [Line Items]
Net operating loss carryforwards	$ 42.3
Net operating loss carryforwards expiration period	expires at various dates between December 31, 2026 and December 31, 2035
Net operating loss carryforwards assets	$ 7.3
Medallion Chicago [Member] | December 31, 2026 To December 31, 2035 [Member]
Income Tax Rate Reconciliation [Line Items]
Net operating loss carryforwards	$ 1.7