Operating Segments - Reconciliation of Total Reportable Segments' Net Income to Consolidated Income (Loss) from Continuing Operations Before Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income from equity method investment	$ 2,256	$ 1,960	$ 4,527	$ 4,701
Segment operating income	53,913	53,037	98,153	90,163
Interest expense	(18,345)	(12,499)	(34,250)	(24,418)
Interest income	149	211	257	562
Income from continuing operations before taxes	35,717	40,749	64,160	66,307
Reportable Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment operating income	53,027	51,620	95,682	86,684
Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment operating income	$ (1,370)	$ (543)	$ (2,056)	$ (1,222)