Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Mar. 28, 2020	Mar. 30, 2019
Numerator:
Income (loss) from continuing operations	$ (128,661)			$ 94,935			$ (81,694)	$ 215,239
Loss from discontinued operations, net of tax				(6,887)			(1,548)	(7,066)
Net (loss) income	$ (128,661)	$ 3,668	$ 41,752	$ 88,048	$ 36,401	$ 83,724	$ (83,242)	$ 208,173
Denominator:
Weighted average common shares for basic earnings per share	99,479,000			108,074,000			101,013,000	111,222,000
Net effect of dilutive stock based compensation awards				748,000				1,030,000
Weighted average common shares for diluted earnings per share	99,479,000			108,822,000			101,013,000	112,252,000
Basic (loss) earnings per share - continuing operations	$ (1.29)			$ 0.87			$ (0.81)	$ 1.93
Basic loss per share-discontinued operations				(0.06)			(0.01)	(0.06)
Basic (loss) earnings per share	(1.29)			0.81			(0.82)	1.87
Diluted (loss) earnings per share - continuing operations	(1.29)			0.87			(0.81)	1.91
Diluted loss per share-discontinued operations				(0.06)			(0.01)	(0.06)
Diluted (loss) earnings per share	$ (1.29)			$ 0.81			$ (0.82)	$ 1.85
antidilutive Securities	208,399						775,060
Stock Options
Denominator:
antidilutive Securities	1,431,000			528,000			1,018,000	410,000