Omnibus Incentive Plan - Performance Stock Units Activity (Details) - Performance Stock Units
$ / shares in Units, $ in Millions
9 Months Ended
May 29, 2021
USD ($)
$ / shares
shares
Units  
Non-vested at beginning of period (in shares) | shares 295,256
Granted (in shares) | shares 116,309
Vested (in shares) | shares 0
Forfeited (in shares) | shares (30,688)
Non-vested at end of period (in shares) | shares 380,877
Weighted average grant-date fair value  
Non-vested at beginning of period (in dollars per share) | $ / shares $ 17.93
Granted (in dollars per share) | $ / shares 23.59
Vested (in dollars per share) | $ / shares 0
Forfeited (in dollars per share) | $ / shares 22.28
Non-vested at end of period (in dollars per share) | $ / shares $ 19.31
Additional disclosures  
Period for recognition of unrecognized compensation cost 1 year 3 months 18 days
Unrecognized compensation costs | $ $ 3.7
Requisite service period 3 years
Minimum  
Additional disclosures  
Performance stock vesting range 0.00%
Maximum  
Additional disclosures  
Performance stock vesting range 200.00%