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Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) | Dec. 31, 2017 | Mar. 31, 2017
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Schedule Of Deferred Income Tax Assets And Liabilities [Line Items] |  |
Accrued employee benefit plan costs | $ 5,838,000 |
Stock based compensation | 230,000 |
Net operating loss and tax credit carryforwards | 3,941,000 |
Restructuring fees not currently deductible for tax purposes | 3,982,000 |
Depreciation and amortization | 29,160,000 |
Other | 3,070,000 |
Gross deferred tax assets | 46,221,000 |
Less valuation allowance | (43,218,000) | $ (2,300,000)
Net deferred tax assets | 3,003,000 |
Basis difference in partnership | (716,000) |
Section 1245 recapture | (2,131,000) |
Other | (156,000) |
Gross deferred tax liabilities | $ (3,003,000) |
Predecessor |  |
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items] |  |
Accrued employee benefit plan costs |  | 18,241,000
Stock based compensation |  | 2,940,000
Net operating loss and tax credit carryforwards |  | 14,693,000
Other |  | 5,587,000
Gross deferred tax assets |  | 41,461,000
Less valuation allowance |  | (2,327,000)
Net deferred tax assets |  | 39,134,000
Basis difference in partnership |  | (17,322,000)
Depreciation and amortization |  | (27,355,000)
Gross deferred tax liabilities |  | (44,677,000)
Net deferred tax assets (liabilities) |  | $ (5,543,000)

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