Borrowings - Summary of Carrying Amount of Principal Borrowings (Parenthetical) (Detail) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Debt Instrument [Line Items]
Loss on extinguishment of debt, net	$ (4,930)	$ 17,200
Promissory Notes \| Mann Group
Debt Instrument [Line Items]
Debt premium recognized in additional paid-in capital	22,100	22,100
Loss on extinguishment of debt, net	$ 22,100	$ 22,100

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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