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v3.7.0.1

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Apr. 30, 2017 | Apr. 30, 2016
--- | --- | ---
Deferred tax assets |  |
Accrued liabilities and reserves | $ 10,948 | $ 11,522
Property and equipment depreciation | 16,604 | 15,914
Workers compensation | 10,934 | 10,540
Deferred compensation | 5,916 | 6,696
Equity compensation | 6,923 | 5,186
State net operating losses & tax credits | 938 | 973
Other | 1,275 | 1,582
Total gross deferred tax assets | 53,538 | 52,413
Less valuation allowance | 60 | 84
Total net deferred tax assets | 53,478 | 52,329
Deferred tax liabilities |  |
Property and equipment depreciation | (468,470) | (425,586)
Goodwill | (25,052) | (21,677)
Other | (80) | 0
Total gross deferred tax liabilities | (493,602) | (447,263)
Net deferred tax liability | $ (440,124) | $ (394,934)

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