CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 27, 2024	Dec. 29, 2023	Dec. 27, 2024	Dec. 29, 2023
Income Statement [Abstract]
Revenues	$ 833,608	$ 712,694	$ 1,637,836	$ 1,398,171
Cost of revenues	(732,759)	(624,364)	(1,437,961)	(1,225,437)
Gross profit	100,849	88,330	199,875	172,734
Selling, general and administrative expenses	(21,206)	(19,316)	(43,237)	(39,745)
Restructuring and other related costs	(46)	0	(103)	0
Operating income	79,597	69,014	156,535	132,989
Interest income	11,314	7,748	22,247	13,646
Interest expense	0	(36)	0	(81)
Foreign exchange gain (loss), net	4,042	(3,788)	(3,053)	(3,373)
Other income (expense), net	(62)	(35)	(81)	(115)
Income before income taxes	94,891	72,903	175,648	143,066
Income tax expense	(8,255)	(3,793)	(11,618)	(8,867)
Net income	86,636	69,110	164,030	134,199
Other comprehensive income (loss), net of tax:
Change in net unrealized gain (loss) on available-for-sale securities	(521)	2,946	6,297	3,894
Change in net unrealized gain (loss) on derivative instruments	(9,416)	8,951	(883)	8,390
Change in net retirement benefits plan – prior service cost	0	8	0	134
Change in foreign currency translation adjustment	428	(206)	76	(106)
Total other comprehensive income (loss), net of tax	(9,509)	11,699	5,490	12,312
Net comprehensive income	$ 77,127	$ 80,809	$ 169,520	$ 146,511
Earnings per share
Basic (in USD per share)	$ 2.40	$ 1.90	$ 4.53	$ 3.70
Diluted (in USD per share)	$ 2.38	$ 1.89	$ 4.51	$ 3.67
Weighted-average number of ordinary shares outstanding (in thousands of shares)
Basic (in shares)	36,163	36,328	36,183	36,292
Diluted (in shares)	36,402	36,639	36,405	36,560