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Share-based compensation - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 25, 2022
Mar. 26, 2021
Mar. 25, 2022
Mar. 26, 2021
Dec. 12, 2019
Nov. 02, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation costs capitalized $ 0 $ 0 $ 0 $ 0    
Shares authorized for future issuance (in shares)         1,281,619  
Shares withheld to settle employee minimum statutory obligation for applicable income and other employment taxes (in shares)     210,006 160,648    
Tax withholdings related to net share settlement of restricted share units     $ 20,439,000 $ 11,362,000    
Equity Incentive 2020 plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of ordinary shares available for grant (in shares)         1,700,000  
Shares reserved for future issuance (in shares)         1,300,000  
Stock Plan 2010            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of ordinary shares available for grant (in shares) 0   0      
Equity Incentive 2017 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized for future issuance (in shares)           160,000
Share units outstanding (in shares) 111,347   111,347      
Restricted share units | Equity Incentive 2020 plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share units outstanding (in shares) 299,009   299,009      
Restricted share units | Stock Plan 2020            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share units outstanding (in shares) 2,231,558   2,231,558      
Restricted share units | Stock Plan 2010            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share units outstanding (in shares) 149,755   149,755      
Restricted share units | Equity Incentive 2017 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share units outstanding (in shares) 12,164   12,164      
Restricted share units | Equity Incentive Plans            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized share-based compensation expense $ 13,600,000   $ 13,600,000      
Unrecognized compensation expense, weighted-average period for recognition     2 years 4 months 24 days      
Restricted share units | Vesting option one            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award granted vesting period, year     3 years      
Restricted share units | Vesting option two            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award granted vesting period, year     4 years      
Restricted share units | Non-employee director            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award granted vesting period, year     1 year      
Restricted share units | Non-employee director | Vest on the first of January            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     100.00%      
Performance share units | Stock Plan 2020            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share units outstanding (in shares) 285,882   285,882      
Performance share units | Equity Incentive Plans            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized share-based compensation expense $ 9,300,000   $ 9,300,000      
Unrecognized compensation expense, weighted-average period for recognition     1 year 1 month 6 days      
Performance share units | Executive of the Company            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award granted vesting period, year     2 years      
Performance share units | Executive of the Company | Vest at the end of the performance period | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     0.00%      
Performance share units | Executive of the Company | Vest at the end of the performance period | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     100.00%