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Stock-Based Compensation - Stock Options (Details)
 6 Months Ended
Dec. 31, 2019
$ / shares
shares
Shares  
Total outstanding options at beginning of year (in shares) | shares 185,473
Options granted (in shares) | shares 0
Options exercised (in shares) | shares 0
Outstanding options at end of period (in shares) | shares 185,473
Price or range per share  
Total outstanding options at beginning of year (in dollars per share) | $ / shares $ 32.51
Options granted (in dollars per share) | $ / shares 0
Options exercised (in dollars per share) | $ / shares 0
Total outstanding options at end of year (in dollars per share) | $ / shares $ 32.51
Exercisable at end of period (in shares) | shares 56,000
Exercisable at end of period (in dollars per share) | $ / shares $ 31.05