Changes to Goodwill by Acquisition (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016
Goodwill [Line Items]
Change in goodwill related to acquisitions		$ 652
Working Capital Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		557
Acquisition Related Tax Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		(315)
Property, Plant and Equipment Final Fair Value Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		410
Dave’s Killer Bread
Goodwill [Line Items]
Change in goodwill related to acquisitions	$ 200	155
Dave’s Killer Bread | Working Capital Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		60
Dave’s Killer Bread | Acquisition Related Tax Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		(315)
Dave’s Killer Bread | Property, Plant and Equipment Final Fair Value Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		410
Alpine Valley Bread Company
Goodwill [Line Items]
Change in goodwill related to acquisitions		497
Alpine Valley Bread Company | Working Capital Adjustments
Goodwill [Line Items]
Change in goodwill related to acquisitions		$ 497