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Equity Incentive Plan - Assumptions Used in Estimating Fair Value (Details) - $ / shares
9 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]    
Weighted-average volatility 28.02% 28.30%
Expected dividend yield 1.12% 1.35%
Risk-free interest rate 1.90% 0.72%
Expected life (years) 6 years 6 months 6 years 6 months
Weighted-average fair value of options granted (in dollars per share) $ 8.68 $ 5.61