Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 28, 2015	Dec. 28, 2014
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill impairment loss	$ 0.6	$ 0.0
Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Discount rates utilized in discounted cash flows	11.50%
Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Discount rates utilized in discounted cash flows	14.00%