Employee Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 28, 2013	Dec. 28, 2013	Jun. 29, 2013
Multiemployer Plans [Line Items]
Employer contribution for pension plan		$ 975
Multiemployer plan withdrawal liability	23,500		21,700
Accretion expense	113
Multiemployer plans, withdrawal obligation, period increase	1,687
Payments made to the Central States Fund		934
Aggregate payments of multiemployer pension plan withdrawal liability	34,500		32,400
Period of payment of withdrawal liability (in years)	20 years		20 years
Discount rate (in percent)	5.25%
Demand notice multiemployer plan withdrawal liability	35,100
Demand notice aggregate payments of multiemployer plan withdrawal liability	56,000
Multi-Employer Pension Plans | Minimum
Multiemployer Plans [Line Items]
Estimated share of undiscounted, unfunded vested benefits under all the MEPPs		4,000
Multi-Employer Pension Plans | Maximum
Multiemployer Plans [Line Items]
Estimated share of undiscounted, unfunded vested benefits under all the MEPPs		$ 5,500