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Components of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets |  |
Tax credits and loss carryforwards | $ 563 | $ 2,550
Accrued liabilities | 9,211 | 6,882
Incentive compensation | 24,682 | 19,333
Other | 3,909 | 3,389
Deferred Tax Assets, Gross | 38,365 | 32,154
Deferred tax liabilities |  |
Property, plant and equipment | (4,000) | (2,858)
Intangibles | (5,325) | (5,565)
Prepaid assets | (697) | (638)
Convertible note discount | (3,234) | (5,117)
Other | (1,658) | (2,025)
Deferred tax liability | (14,914) | (16,203)
Net deferred tax asset before valuation allowances and reserves | 23,451 | 15,951
Valuation allowances | (1,159) | (1,307)
Net deferred tax asset | $ 22,292 | $ 14,644

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