Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans - Restricted Stock Units (Details)

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Equity and Long-Term Incentive Compensation Plans - Restricted Stock Units (Details) - Restricted stock units - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant date fair value per unit (in dollars per share) $ 109.80 $ 86.04 $ 91.84 $ 71.45
Grant date fair value of vested restricted stock units $ 745 $ 2,769 $ 42,601 $ 33,820
Tax benefits realized by the Company in connection with vested and released restricted stock units $ 249 $ 1,135 $ 16,731 $ 15,829