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Schedule of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Mar. 31, 2019
Accounts Payable And Accrued Liabilities Current [Abstract]    
Payroll and Incentive Compensation $ 25,584 $ 26,225
Benefits 12,521 12,673
Interest 4,080 3,852
Property Taxes 6,676 5,058
Power and Fuel 1,353 1,644
Litigation Settlements and Expenses   1,900
Legal and Professional 16,096  
Sales and Use Tax 1,085 2,167
Other 5,898 8,430
Accrued Expenses, Total $ 73,293 $ 61,949