Related Party Transactions - Schedule of Asset Purchase Agreement Relating to the Territories (Detail) - CCR [Member]	6 Months Ended	12 Months Ended
	Jul. 03, 2016	Jan. 03, 2016	Dec. 28, 2014
Johnson City and Morristown Tennessee [Member]
Business Acquisition [Line Items]
Asset Agreement Date			May 07, 2014
Acquisition Closing Date			May 23, 2014
Knoxville, Tennessee [Member]
Business Acquisition [Line Items]
Asset Agreement Date			Aug. 28, 2014
Acquisition Closing Date			Oct. 24, 2014
Cleveland and Cookeville Tennessee [Member]
Business Acquisition [Line Items]
Asset Agreement Date			Dec. 05, 2014
Acquisition Closing Date		Jan. 30, 2015
Louisville, Kentucky and Evansville, Indiana [Member]
Business Acquisition [Line Items]
Asset Agreement Date			Dec. 17, 2014
Acquisition Closing Date		Feb. 27, 2015
Paducah and Pikeville, Kentucky [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Feb. 13, 2015
Acquisition Closing Date		May 01, 2015
Norfolk, Fredericksburg and Staunton, Virginia and Elizabeth City, North Carolina [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Sep. 23, 2015
Acquisition Closing Date		Oct. 30, 2015
Richmond and Yorktown, Virginia and Easton and Salisbury, Maryland [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Sep. 23, 2015
Acquisition Closing Date	Jan. 29, 2016
Sandston Regional Manufacturing Facility [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Oct. 30, 2015
Acquisition Closing Date	Jan. 29, 2016
Alexandria, Virginia and Capitol Heights and La Plata, Maryland [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Sep. 23, 2015
Acquisition Closing Date	Apr. 01, 2016
Baltimore Hagerstown and Cumberland, Maryland [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Sep. 23, 2015
Acquisition Closing Date	Apr. 29, 2016
Silver Springs and Baltimore Regional Manufacturing Facility [Member]
Business Acquisition [Line Items]
Asset Agreement Date		Oct. 30, 2015
Acquisition Closing Date	Apr. 29, 2016