Schedule of Components of Deferred Tax Assets Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
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