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INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Accrued expenses and reserves | $ 34,647 | $ 26,572
Net operating loss carryforwards | 31,241 | 33,228
Book over tax depreciation of property and equipment | 19,048 | 25,615
General business tax credit carryforwards | 6,192 | 5,439
Stock awards | 2,310 | 1,958
Alternative minimum tax credit carryforwards | 1,902 | 3,804
Other | 3,023 | 2,050
Total deferred tax assets | 98,363 | 98,666
Less: valuation allowance | (69,189) | (68,355)
Total deferred tax assets after valuation allowance | 29,174 | 30,311
Deferred tax liabilities: |  |
Amortization of intangibles | (22,026) | (20,904)
Other | (73) | (145)
Total deferred tax liabilities | (22,099) | (21,049)
Net deferred tax asset | $ 7,075 | $ 9,262

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