Accounts and Income Taxes Payable and Accrued Liabilities - Accrued Liabilities (Detail) - USD ($)	Dec. 31, 2023	Apr. 01, 2023	Mar. 31, 2023
Payables and Accruals [Abstract]
Payroll, payroll taxes and employee benefits	$ 40,550,000		$ 22,170,000
Customer deposits	80,838,000		80,022,000
Accrued professional service fees	8,245,000		8,601,000
Self-insurance accruals	3,318,000		3,563,000
Deferred revenue	29,823,000	$ 26,978,000	26,978,000
Operating lease liabilities	9,316,000		9,900,000
Other	1,164,000		1,344,000
Total accrued liabilities	$ 173,254,000		$ 152,578,000