Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Non-cash share-based compensation expense	$ 3,200,000	$ 5,300,000	$ 5,877,000	$ 7,349,000
Unrecognized tax benefits related to federal, state and foreign taxes					15,600,000
Unrecognized tax benefits related to federal, state and foreign taxes of which would impact the effective tax rate if recognized					14,100,000
Unrecognized tax benefits, accrued interest					1,900,000
Unrecognized tax benefits, penalties					2,000,000
Unrecognized tax benefits, interest recognized	(200,000)	100,000
Unrecognized tax benefits, penalties recognized	(400,000)	100,000
Unrecognized tax benefits recognized related to reduced tax exposures			4,100,000
Amount of unrecognized tax benefits that may be recognized over the next twelve months	100,000		100,000
Interest paid			3,700,000	3,800,000
Income tax payments			$ 15,300,000	$ 11,300,000