Impairment Charges - Summary of Significant Unobservable Inputs (Detail) - Fair Value Measurements [Member] $ in Millions	Mar. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Assets, Fair Value	$ 10.0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Assets, Fair Value	10.0
Impairment of Consolidated Assets [Member] | Level 3 [Member] | Indicative Bid [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Consolidated Assets, Fair Value	$ 10.0