Costs Associated with Exit and Restructuring Activities - Summary of Exit and Restructuring Costs Incurred (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	21 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 31, 2012	Sep. 28, 2013
Restructuring Cost and Reserve [Line Items]
Severance, stay bonuses, and other employee-related expenses	$ 440		$ 3,338		$ 960	$ 4,298
Professional services	91		157		0	157
Relocation and transition costs	(12)		20		0	20
Total	519	0	3,515	0	960	4,475
Additional costs expected to be incurred						2,436
Total costs expected to be incurred						6,911
Severance, Stay Bonuses, and Other Employee-Related Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Additional costs expected to be incurred						2,286
Total costs expected to be incurred						6,584
Professional Services [Member]
Restructuring Cost and Reserve [Line Items]
Additional costs expected to be incurred						0
Total costs expected to be incurred						157
Relocation and Transition Costs [Member]
Restructuring Cost and Reserve [Line Items]
Additional costs expected to be incurred						150
Total costs expected to be incurred						$ 170