Leases - Summary of Information Relating to Lease Term and Discount Rate (Detail)	Mar. 31, 2021	Mar. 31, 2020
Weighted average remaining lease term (in months)
Operating leases	17 years 4 months 24 days	26 years
Finance leases	38 years 2 months 12 days	50 years 2 months 12 days
Weighted average discount rate
Operating leases	7.50%	7.50%
Finance leases	7.50%	7.50%