Benefit Plans - Component of Net Periodic Pension Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 54,571	$ 45,487	$ 593	$ 885
Prior service cost	1,720	1,982
Deferred tax benefit	(23,617)	(19,903)
Total	$ 32,674	$ 27,566