Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Dec. 30, 2012
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Number of sponsored pension plan	2
Period considered for computing highest average compensation	5 years
Period considered for computing average of social security taxable wages	35 years
Entity contribution in its owned sponsored pension plan during the period	$ 0
Multi-employer pension plan exit charge, liability recorded	9.5
Multi-employer pension plan exit annual payable amount	1
Minimum [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Benefit pension plan anticipated contribution the remainder of fiscal year	2
Maximum [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Benefit pension plan anticipated contribution the remainder of fiscal year	4
401(k) Savings Plan [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Company discretionary matching contribution percentage	5.00%	5.00%	5.00%
Defined contribution plan matching contribution percentage accrued	5.00%	5.00%	5.00%
Cost recognized	$ 3.8	$ 4.3