Goodwill and intangible assets Textuals (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Goodwill and intangible assets
Goodwill impairment expense	$ 120,500		$ 120,475
Weighted average life of intangible assets	2 years
Intangible asset amortization expense	$ 21,000	$ 21,900	$ 62,240	$ 63,123
Impairment of long lived assets including intangible assets	25,300
Investment impairment	$ 15,300