Business Segment Information - Product Sales Excluding All Other Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 24, 2018	Jun. 25, 2017
Segment Reporting Information [Line Items]
Total product sales	$ 708,804	$ 678,912	$ 647,270
Polyester [Member]
Segment Reporting Information [Line Items]
Total product sales	606,513	572,053	529,426
Nylon [Member]
Segment Reporting Information [Line Items]
Total product sales	98,127	102,639	112,704
Product sales (excluding the All Other category) [Member]
Segment Reporting Information [Line Items]
Total product sales	$ 704,640	$ 674,692	$ 642,130