Property, Plant and Equipment (Details) - USD ($) $ in Thousands		3 Months Ended		8 Months Ended
		Sep. 12, 2015	Sep. 06, 2014	Sep. 12, 2015	Sep. 06, 2014	Jan. 03, 2015
Property, Plant and Equipment [Abstract]
Buildings and storage tanks	[1]	$ 70,886		$ 70,886		$ 72,905
Machinery, vehicles and equipment	[1]	57,200		57,200		50,182
Land	[1]	11,643		11,643		12,576
Leasehold improvements	[1]	4,282		4,282		3,312
Construction in progress		19,491		19,491		18,822
Assets held for sale		690		690		0
Total property, plant and equipment		164,192		164,192		157,797
Less accumulated depreciation		(29,993)		(29,993)		(22,678)
Property, plant and equipment - net		134,199		134,199		135,119
Equipment at customers		57,568		57,568		53,781
Less accumulated depreciation		(34,709)		(34,709)		(31,742)
Equipment at customers - net		22,859		22,859		$ 22,039
Depreciation expenses		$ 3,700	$ 2,100	$ 11,100	$ 6,500

[1] Numbers include preliminary fair values of assets acquired in the acquisition described in Note 3 that may be adjusted as additional information becomes known. Amounts as of January 3, 2015 reflect adjustments between property, plant, and equipment categories to reflect additional information regarding the classification of the assets acquired.