CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Dec. 29, 2023	Dec. 30, 2022
Income Statement [Abstract]
Revenues	$ 712,694	$ 668,656	$ 1,398,171	$ 1,324,085
Cost of revenues	(624,364)	(583,441)	(1,225,437)	(1,156,114)
Gross profit	88,330	85,215	172,734	167,971
Selling, general and administrative expenses	(19,316)	(18,930)	(39,745)	(39,495)
Operating income	69,014	66,285	132,989	128,476
Interest income	7,748	2,334	13,646	3,893
Interest expense	(36)	(389)	(81)	(780)
Foreign exchange gain (loss), net	(3,788)	(3,904)	(3,373)	(1,819)
Other income (expense), net	(35)	(68)	(115)	(209)
Income before income taxes	72,903	64,258	143,066	129,561
Income tax expense	(3,793)	(1,101)	(8,867)	(1,789)
Net income	69,110	63,157	134,199	127,772
Other comprehensive income (loss), net of tax:
Change in net unrealized gain (loss) on available-for-sale securities	2,946	1,183	3,894	(278)
Change in net unrealized gain (loss) on derivative instruments	8,951	11,188	8,390	9,970
Change in net retirement benefits plan – prior service cost	8	57	134	225
Change in foreign currency translation adjustment	(206)	(84)	(106)	162
Total other comprehensive income (loss), net of tax	11,699	12,344	12,312	10,079
Net comprehensive income	$ 80,809	$ 75,501	$ 146,511	$ 137,851
Earnings per share
Basic (in USD per share)	$ 1.90	$ 1.73	$ 3.70	$ 3.50
Diluted (in USD per share)	$ 1.89	$ 1.71	$ 3.67	$ 3.47
Weighted-average number of ordinary shares outstanding (thousands of shares)
Basic (in shares)	36,328	36,589	36,292	36,558
Diluted (in shares)	36,639	36,939	36,560	36,848