Employee Benefit Plans - Summary of Company's Stock Option and Restricted Stock Unit Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2013
Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Shares Available for Grant, Beginning balance	10,155
Shares Available for Grant, Authorized
Shares Available for Grant, Granted	(2,914)
Shares Available for Grant, Options exercised
Shares Available for Grant, Shares released
Shares Available for Grant, Forfeited or cancelled	944
Shares Available for Grant, Ending balance	8,185
Restricted Stock Units Outstanding [Member]
Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Number of Units, Beginning balance	3,938
Number of Shares, Authorized
Number of Units, Granted	1,109
Number of Units, Shares released	(918)
Number of Units, Forfeited or cancelled	(213)
Number of Units, Ending balance	3,916
Weighted Average Grant Date Fair Value, Beginning balance	6.44
Weighted Average Grant Date Fair Value, Authorized
Weighted Average Grant Date Fair Value, Granted	5.75
Weighted Average Grant Date Fair Value, Shares released	6.06
Weighted Average Grant Date Fair Value, Forfeited or cancelled	6.82
Weighted Average Grant Date Fair Value, Ending balance	6.32
Stock Options Outstanding [Member]
Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Number of Shares, Beginning balance	8,900
Number of Shares, Authorized
Number of Shares, Granted	1,251
Number of Shares, Options exercised	(191)
Number of Shares, Forfeited or cancelled	(630)
Number of Shares, Ending balance	9,330
Weighted Average Exercise Price, Beginning balance	6.83
Weighted Average Exercise Price, Authorized
Weighted Average Exercise Price, Granted	5.77
Weighted Average Exercise Price, Options exercised	2.95
Weighted Average Exercise Price, Forfeited or cancelled	6.18
Weighted Average Exercise Price, Ending balance	6.81