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Components of Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred tax assets |  |
Tax credits and loss carryforwards | $ 18,779 | $ 51,811
Accrued liabilities | 6,964 | 6,816
Incentive compensation | 16,621 | 12,913
Other | 4,736 | 6,897
Deferred Tax Assets, Gross | 47,100 | 78,437
Deferred tax liabilities |  |
Property, plant and equipment | (295) | (163)
Intangibles | (4,993) | (4,026)
Prepaid assets | (690) | (1,160)
Convertible note discount | (6,585) | (7,846)
Other | (29) | (231)
Deferred tax liability | (12,592) | (13,426)
Net deferred tax asset before valuation allowances and reserves | 34,508 | 65,011
Valuation allowances | (1,438) | (1,852)
Net deferred tax asset | $ 33,070 | $ 63,159

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