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Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Mar. 31, 2018
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Accounts Payable And Accrued Liabilities Current [Abstract] |  |
Payroll and Incentive Compensation | $ 16,276 | $ 25,290
Benefits | 12,221 | 13,785
Interest | 7,198 | 3,852
Property Taxes | 6,415 | 5,422
Power and Fuel | 1,804 | 1,545
Litigation Settlements | 40,525 | 45,098
Legal | 872 | 1,435
Sales and Use Tax | 1,023 | 890
Other | 9,576 | 8,553
Accrued Expenses, Total | $ 95,910 | $ 105,870

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