Earnings per ordinary share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 24, 2021	Dec. 25, 2020	Dec. 24, 2021	Dec. 25, 2020
Earnings Per Share [Abstract]
Net income attributable to shareholders	$ 48,879	$ 35,384	$ 93,530	$ 68,435
Weighted-average number of ordinary shares outstanding (thousands of shares)	37,017	36,936	36,947	36,877
Incremental shares arising from the assumed vesting of restricted share units and performance share units (thousands of shares)	535	615	493	590
Weighted-average number of ordinary shares for diluted earnings per ordinary share (thousands of shares)	37,552	37,551	37,440	37,467
Basic earnings per share (in USD per share)	$ 1.32	$ 0.96	$ 2.53	$ 1.86
Diluted earnings per share (in USD per share)	$ 1.30	$ 0.94	$ 2.50	$ 1.83
Outstanding performance share units excluded from the computation of diluted earnings per ordinary share (thousands of shares)	0	91	0	91