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Stock Options (Details) - Share-based Payment Arrangement, Option [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding, period start, number of shares 32 52 72
Granted, number of shares 0 0 0
Forfeited, number of shares 0 0 0
Exercised, number of shares (10) (20) (20)
Outstanding, period end, number of shares 22 32 52
Outstanding, period start, weighted average exercise price $ 87.27 $ 62.65 $ 50.04
Granted, weighted average exercise price 0 0 0
Forfeited, weighted average exercise price 0 0 0
Exercised, weighted average exercise price 87.27 23.65 17.45
Outstanding, period end, weighted average exercise price $ 87.27 $ 87.27 $ 62.65
Outstanding, period end, intrinsic value $ 2,098    
Vested and Expected to Vest, period end, number of shares 22    
Vested and Expected to Vest, period end, weighted average exercise price $ 87.27    
Vested and Expected to Vest, period end, intrinsic value $ 2,098    
Exercisable, period end, number of shares 22    
Exercisable, period end, weighted average exercise price $ 87.27    
Exercisable, period end, intrinsic value $ 2,098