Income Taxes - Reconciliation of Provision for/(Benefit from) Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense Benefit [Line Items]
Expected tax expense at federal statutory rate of 35%	$ 61,344	$ 32,826	$ 13,151
State taxes, net of federal benefit	2,373	2,363	1,237
Foreign rate differential	(11,953)	(25,607)	(26,521)
U.S. taxes on foreign earnings	5,043	32,793	36,128
Withholding taxes	7,842	8,770	5,933
Tax benefit related to valuation allowance release for SandForce acquisition	(42,365)
Change in valuation allowance	(9,432)	(23,439)	2,921
Nondeductible expenses	5,241	8,049	5,731
Tax refunds/credits	(1,964)	(2,926)	(3,140)
Tax benefit related to refundable R&D/alternative minimum tax credit		(530)
Tax deduction for loss on liquidation of subsidiary	(18,200)
Lapsed statute of limitations and tax audit settlements	(18,889)	(16,796)	(31,668)
Intraperiod allocation of tax benefit to continuing operations		(11,725)	(644)
Other			42
Total	$ (20,960)	$ 3,778	$ 3,170