Goodwill And Other Intangible Assets (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 25, 2011	Sep. 30, 2012	Sep. 25, 2011
Amortization expense of intangible assets	$ 11,100	$ 10,700	$ 32,263	$ 32,087