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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Fair Value of Assets and Liabilities (Details) - USD ($)
$ in Thousands
Feb. 23, 2020
May 26, 2019
Assets:    
Assets held for sale - nonrecurring $ 2,600  
Fair Value, Measurements, Recurring | Level 1    
Assets:    
Interest rate swap contracts 0 $ 0
Assets held for sale - nonrecurring 0 0
Investment in non-public company 0 0
Total assets 0 0
Liabilities:    
Interest rate swap contracts 0 0
Contingent consideration liability 0 0
Total liabilities 0 0
Fair Value, Measurements, Recurring | Level 2    
Assets:    
Interest rate swap contracts 58 644
Assets held for sale - nonrecurring 0 0
Investment in non-public company 0 0
Total assets 58 644
Liabilities:    
Interest rate swap contracts 1,145 482
Contingent consideration liability 0 0
Total liabilities 1,145 482
Fair Value, Measurements, Recurring | Level 3    
Assets:    
Interest rate swap contracts 0 0
Assets held for sale - nonrecurring 2,607 0
Investment in non-public company 61,300 61,100
Total assets 63,907 61,100
Liabilities:    
Interest rate swap contracts 0 0
Contingent consideration liability 0 500
Total liabilities $ 0 $ 500