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Schedule of Components of Deferred Tax Assets Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Income Tax Disclosure [Line Items] |  |
Net operating loss carryforwards | $ 14,679 | $ 36,674
Tax credits | 65,210 | 64,123
Inventory valuations | 38,452 | 50,886
Pension liability | 22,966 | 28,674
Research and development |  | 284
Accruals | 17,828 | 14,246
Equity compensation | 10,498 | 9,355
Vacation accrual | 7,291 | 6,452
Other | 2,613 | 282
Deferred revenue | 12,379 | 15,118
Gross deferred tax assets | 191,916 | 226,094
Less: valuation allowance | (40,386) | (55,446)
Total deferred tax assets | 151,530 | 170,648
Marketable securities | (794) | (996)
Intangible assets | (89,268) | (114,730)
Excess of tax over book depreciation | (24,458) | (22,446)
Total deferred tax liabilities | (114,520) | (138,172)
Net deferred assets | $ 37,010 | $ 32,476

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