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Accounts and Income Taxes Payable and Accrued Liabilities - Accrued Liabilities (Detail) - USD ($) | Sep. 30, 2025 | Mar. 31, 2025
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Payables and Accruals [Abstract] |  |
Payroll, payroll taxes and employee benefits | $ 39,817,000 | $ 30,971,000
Customer deposits | 112,302,000 | 101,472,000
Accrued professional service fees | 10,879,000 | 11,004,000
Self-insurance accruals | 3,561,000 | 3,276,000
Deferred revenue | 30,909,000 | 30,809,000
Operating lease liabilities | 7,317,000 | 8,126,000
Other | 2,434,000 | 1,586,000
Total accrued liabilities | $ 207,219,000 | $ 187,244,000

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