Costs Associated with Exit and Restructuring Activities - Summary of Exit and Restructuring Costs Incurred (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	15 Months Ended
	Mar. 30, 2013	Dec. 31, 2012	Mar. 30, 2013
Restructuring Cost and Reserve [Line Items]
Severance, stay bonuses, and other employee-related expenses	$ 1,862	$ 960	$ 2,822
Professional services	12	0	12
Relocation and transition costs	21	0	21
Total	1,895	960	2,855
Additional costs expected to be incurred			3,485
Total costs expected to be incurred			6,340
Severance, stay bonuses, and other employee-related expenses [Member]
Restructuring Cost and Reserve [Line Items]
Additional costs expected to be incurred			2,728
Total costs expected to be incurred			5,550
Professional services [Member]
Restructuring Cost and Reserve [Line Items]
Additional costs expected to be incurred			298
Total costs expected to be incurred			310
Relocation and transition costs [Member]
Restructuring Cost and Reserve [Line Items]
Additional costs expected to be incurred			459
Total costs expected to be incurred			$ 480