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Schedule of Components of Deferred Tax Assets Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Income Tax Disclosure [Line Items] |  |
Tax credits | $ 44,684 | $ 50,554
Pension liabilities | 31,742 | 30,036
Inventory valuations | 29,445 | 29,105
Accruals | 26,563 | 23,323
Deferred revenue | 10,232 | 10,242
Equity compensation | 9,674 | 11,131
Net operating loss carryforwards | 7,989 | 10,989
Vacation accrual | 7,354 | 7,425
Other | 502 | 1,725
Gross deferred tax assets | 168,185 | 174,530
Less: valuation allowance | (43,039) | (41,737)
Total deferred tax assets | 125,146 | 132,793
Intangible assets | (68,433) | (64,871)
Depreciation | (20,541) | (24,905)
Marketable securities | (458) | (1,599)
Total deferred tax liabilities | (89,432) | (91,375)
Net deferred assets | $ 35,714 | $ 41,418

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