Goodwill and Intangible Assets, Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 26, 2015	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016	Mar. 31, 2018	Sep. 24, 2016
Goodwill [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 2,790			$ 5,800	$ 31,600
Goodwill, Acquired During Period		41,889
Impairment of Long-Lived Assets to be Disposed of	$ 157,700	42	$ 1,462	$ 160,153
Goodwill [Roll Forward]
Balance		491,015	490,648
Goodwill, Adjustments		(653)	367
Balance		$ 532,251	$ 491,015	$ 490,648