Retirement Plans -Summary of Net Pension and Serp Expense Recognized (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Pension And Other Employee Benefit Plans [Line Items]
Service cost pertaining to benefits earned during the year	$ (7,709)	$ (6,499)	$ (5,729)
Interest cost on projected benefit obligations	(15,314)	(13,326)	(12,719)
Expected return on pension assets	15,958	14,255	12,208
Net amortization loss	(20,837)	(11,932)	(10,046)
Net pension expense	$ (27,902)	$ (17,502)	$ (16,286)