Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended			6 Months Ended			12 Months Ended
	Dec. 29, 2013	Jun. 29, 2014	Jun. 29, 2014 Minimum [Member]	Jun. 29, 2014 Maximum [Member]	Jun. 29, 2014 Rehabilitation Plan [Member]	Jun. 29, 2014 401(k) Savings Plan [Member]	Jun. 30, 2013 401(k) Savings Plan [Member]	Dec. 29, 2013 401(k) Savings Plan [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Non-cash charge due to lump sum distribution	$ 12.0
Benefit pension plan, anticipated contribution remainder of year			5	10
Company matching contribution percentage						3.50%		5.00%
Defined contribution plan matching contribution percentage accrued						1.50%		5.00%
Defined contribution percentage portion of participants contribution first matched by Company						3.50%
Defined contribution percentage portion of additional contribution increased as per option of Company						1.50%		5.00%
Cost recognized						4.3	3.8
Multi-employer pension plan exit charge, liability recorded		9.1
Multi-employer pension plan exit annual payment amount		1
Multi-employer pension plan Rehabilitation Plan adoption effective date					Jan. 01, 2015
Collective bargaining agreement, effective date					Apr. 28, 2014
Likely withdrawal liability if Company withdraws from multi-employer pension plan		$ 4.5