Reclassification of Items in Statement of Income and Supplemental Results Summary (Details) - USD ($)	3 Months Ended				6 Months Ended	9 Months Ended
	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Dec. 28, 2014	Sep. 27, 2015	Dec. 27, 2015	Dec. 28, 2014
Reclassification adjustment
Cost of goods sold	$ 110,057,300			$ 106,367,800		$ 327,581,000	$ 343,330,100
Selling, general and administrative expenses.	$ 24,742,400			26,136,800		$ 76,730,200	78,703,600
Reclassification
Reclassification adjustment
Cost of goods sold		$ 3,300,000	$ 3,300,000	3,700,000	$ 6,600,000		9,900,000
Selling, general and administrative expenses.		$ (3,300,000)	$ (3,300,000)	$ (3,700,000)	$ (6,600,000)		$ (9,900,000)