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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Property, Plant and Equipment            
Total lease obligations $ 26,311     $ 26,311    
Selling expenses       95,503 $ 121,762 $ 139,647
Undiscounted workers' compensation liability 3,900 $ 5,200   3,900 5,200  
Reinsurance recoveries 600 800   600 800  
Liability for claims and claims adjustment expense 1,400 1,600   1,400 1,600  
Right-of-use operating lease assets 26,254 21,117   $ 26,254 21,117  
Operating Lease, Remaining Contractual Term       8 years    
Operating Lease, Extension Term       10 years    
Group Medical Insurance Liability 900 900   $ 900 900  
Percent Of Workforce Covered By Collective Bargaining Agreement       15.00%    
Cash            
Property, Plant and Equipment            
Letter of credit posted as security deposit 800       1,500  
Security Deposit - Letter of Credit            
Property, Plant and Equipment            
Letter of credit posted as security deposit 4,300       $ 2,300  
Shipping and Handling            
Property, Plant and Equipment            
Selling expenses $ 9,100 $ 9,800 $ 11,400      
Buildings and facilities | Minimum            
Property, Plant and Equipment            
Property, plant and equipment useful life       10 years    
Buildings and facilities | Maximum            
Property, Plant and Equipment            
Property, plant and equipment useful life       30 years    
Machinery and equipment | Minimum            
Property, Plant and Equipment            
Property, plant and equipment useful life       3 years    
Machinery and equipment | Maximum            
Property, Plant and Equipment            
Property, plant and equipment useful life       15 years    
Office furniture and equipment | Minimum            
Property, Plant and Equipment            
Property, plant and equipment useful life       5 years    
Office furniture and equipment | Maximum            
Property, Plant and Equipment            
Property, plant and equipment useful life       7 years    
Capitalized software | Minimum            
Property, Plant and Equipment            
Property, plant and equipment useful life       3 years    
Capitalized software | Maximum            
Property, Plant and Equipment            
Property, plant and equipment useful life       5 years    
Five Customers [Member] | Accounts Receivable Benchmark | Customer Concentration Risk            
Property, Plant and Equipment            
Concentration risk (percent)       31.00% 39.00%