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Stock Incentive Plans - Information related to stock appreciation rights awards exercised (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Net cash proceeds $ 2,475 $ 3,682 $ 2,202
SARs      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Net cash proceeds 2,475 3,682 2,202
Intrinsic value 95,502 136,000 153,908
Income tax benefit 15,584 28,701 31,193
Stock-based compensation expense $ 26,568 $ 27,422 $ 28,535
Shares surrendered upon exercise of stock (in shares) 158,610 269,670 371,246