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Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Mar. 31, 2016
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Accrued employee benefit plan costs | $ 18,241 | $ 19,705
Stock based compensation | 2,940 | 6,780
Net operating loss and tax credit carryforwards | 14,693 | 6,177
Other | 5,587 | 5,548
Gross deferred tax assets | 41,461 | 38,210
Less valuation allowance | (2,327) | (4,705)
Net deferred tax assets | 39,134 | 33,505
Basis difference in partnership | (17,322) | (8,375)
Depreciation and amortization | (27,355) | (25,130)
Gross deferred tax liabilities | (44,677) | $ (33,505)
Net deferred tax assets (liabilities) | $ (5,543) |

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