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Accumulated Other Comprehensive Income (Loss) - Changes in AOCI by Component (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2019
Nov. 24, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period $ (491)  
OCI before reclassifications (80)  
OCI before reclassifications   $ (22)
Amounts reclassified from AOCI 20 8
Net current-period OCI (60) (14)
Balance at end of period (551)  
Defined Benefit Pension Items    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (559) (591)
Amounts reclassified from AOCI 8 8
Net current-period OCI 8 8
Balance at end of period (551) (583)
Interest Rate Swap    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period 68 1,483
OCI before reclassifications (80)  
OCI before reclassifications   (22)
Amounts reclassified from AOCI 12  
Net current-period OCI (68) (22)
Balance at end of period 0 1,461
Total    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (491) 892
OCI before reclassifications   (22)
Balance at end of period $ (551) $ 878