Accumulated other comprehensive income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Dec. 29, 2023	Dec. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,530,169	$ 1,302,366	$ 1,468,658	$ 1,253,682
Other comprehensive income (loss) before reclassification			13,188	12,379
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			(1,606)	(2,300)
Tax effects			730	0
Total other comprehensive income (loss), net of tax	11,699	12,344	12,312	10,079
Ending balance	1,611,382	1,384,131	1,611,382	1,384,131
Unrealized net (Losses)/Gains on Available-for-sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(3,279)	(6,018)
Other comprehensive income (loss) before reclassification			3,893	(371)
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			1	93
Tax effects			0	0
Total other comprehensive income (loss), net of tax			3,894	(278)
Ending balance	615	(6,296)	615	(6,296)
Unrealized net (Losses)/Gains on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(3,541)	(5,082)
Other comprehensive income (loss) before reclassification			9,401	12,588
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			(1,765)	(2,618)
Tax effects			754	0
Total other comprehensive income (loss), net of tax			8,390	9,970
Ending balance	4,849	4,888	4,849	4,888
Retirement benefit plan - Prior service cost
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(330)	(803)
Other comprehensive income (loss) before reclassification			0	0
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			158	225
Tax effects			(24)	0
Total other comprehensive income (loss), net of tax			134	225
Ending balance	(196)	(578)	(196)	(578)
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(965)	(890)
Other comprehensive income (loss) before reclassification			(106)	162
Amounts reclassified out of AOCI to the unaudited condensed consolidated statements of operations and comprehensive income			0	0
Tax effects			0	0
Total other comprehensive income (loss), net of tax			(106)	162
Ending balance	(1,071)	(728)	(1,071)	(728)
AOCI Attributable to parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(7,502)	(15,058)	(8,115)	(12,793)
Total other comprehensive income (loss), net of tax	11,699	12,344	12,312	10,079
Ending balance	$ 4,197	$ (2,714)	$ 4,197	$ (2,714)