Earnings per ordinary share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 25, 2022	Mar. 26, 2021	Mar. 25, 2022	Mar. 26, 2021
Earnings Per Share [Abstract]
Net income attributable to shareholders	$ 50,661	$ 37,493	$ 144,191	$ 105,928
Weighted-average number of ordinary shares outstanding (in shares)	36,940	36,875	36,945	36,876
Incremental shares arising from the assumed vesting of restricted share units and performance share units (in shares)	533	734	506	638
Weighted-average number of ordinary shares for diluted earnings per ordinary share (in shares)	37,473	37,609	37,451	37,514
Basic earnings per ordinary share (in USD per share)	$ 1.37	$ 1.02	$ 3.90	$ 2.87
Diluted earnings per ordinary share (in USD per share)	$ 1.35	$ 1.00	$ 3.85	$ 2.82
Outstanding performance share units excluded from the computation of diluted earnings per ordinary share (thousands of shares)	0	76	0	76