Reclassification (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 27, 2016	Mar. 29, 2015	Mar. 30, 2014
Reclassification adjustment
Cost of goods sold	$ 91,135,200	$ 110,057,300	$ 111,841,600	$ 105,682,100	$ 88,650,400	$ 106,367,800	$ 116,160,800	$ 120,801,500	$ 418,716,200	$ 431,980,500	$ 433,728,700
Selling, general and administrative expenses	26,202,100	$ 24,742,400	$ 25,865,400	$ 26,122,400	$ 23,983,100	$ 26,136,800	$ 26,494,400	$ 26,072,400	102,932,300	102,686,700	99,868,000
Reclassification
Reclassification adjustment
Cost of goods sold										13,300,000	11,800,000
Selling, general and administrative expenses										$ (13,300,000)	$ (11,800,000)
Accounting Standards Update No. 2015-17 | Reclassification
Reclassification adjustment
Current deferred tax assets	(3,900,000)								(3,900,000)
Noncurrent deferred tax assets	$ 3,900,000								$ 3,900,000