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Share Capital, Option Plans and Share-Based Payments - Summary of Outstanding Stock Options, Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 23, 2016
Sep. 30, 2016
Sep. 30, 2015
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares)   4,521,770   4,177,408
Unrecognized compensation cost relating to unvested stock awards   $ 25.0    
Unvested stock awards compensation cost, weighted average recognition period   2 years 3 months 40 days    
Cash proceeds from exercise of options granted   $ 2.4 $ 4.3  
Tax benefit realized from exercise of options   $ 0.1 $ 0.2  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional shares authorized (in shares) 4,000,000      
Options outstanding (in shares)   4,521,770    
Common shares available for issuance (in shares)   6,356,843    
Expire period of options, minimum term   7 years    
Expire period of options, maximum term   10 years    
Stock Options | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   4 years    
Stock Options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   5 years