Accounts and Taxes Payable and Accrued Liabilities - Accrued Liabilities (Detail) - USD ($)	Sep. 30, 2016	Mar. 31, 2016
Payables And Accruals [Abstract]
Payroll, payroll taxes and employee benefits	$ 15,827,000	$ 18,003,000
Customer deposits	31,189,000	25,649,000
Accrued professional service fees	4,895,000	4,692,000
Self-insurance accruals	2,845,000	3,095,000
Deferred revenue	8,623,000	7,821,000
Accrued rent	4,598,000	4,907,000
Other	2,462,000	3,015,000
Total accrued liabilities	$ 70,439,000	$ 67,182,000