Accounts and Income Taxes Payable and Accrued Liabilities - Accrued Liabilities (Detail) - USD ($)	Jun. 30, 2022	Mar. 31, 2022
Payables and Accruals [Abstract]
Payroll, payroll taxes and employee benefits	$ 33,971,000	$ 36,066,000
Customer deposits	74,421,000	69,781,000
Accrued professional service fees	6,165,000	8,073,000
Self-insurance accruals	2,700,000	2,798,000
Deferred revenue	26,022,000	25,796,000
Operating lease liabilities	12,718,000	13,348,000
Other	1,507,000	1,077,000
Total accrued liabilities	$ 157,504,000	$ 156,939,000