Restructuring Accrual Activity recorded on Condensed Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 12,805	$ 3,994	$ 3,994
Costs incurred	9,660		11,500
Cash payments and other	(8,570)	(909)	(2,689)
Ending balance	$ 13,895	$ 3,085	$ 12,805