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Employee Benefits - 401(k) Retirement Plan (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Employee Benefits      
Matching contributions of eligible compensation 4.00%    
Additional profit-sharing contributions of eligible salary 5.00%    
401(k) Retirement Plan Expense $ 1.9 $ 1.7 $ 1.5
401(k) Retirement Plan Shares Held 398,000    
Vesting period 5 years