Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share, Basic and Diluted [Abstract]
Net Income	$ 73,855	$ 59,252	$ 235,323	$ 210,892
Common share information:
Weighted average shares outstanding for basic earnings per share	76,683	77,177	76,845	77,194
Dilutive effect of stock options and restricted stock	201	109	117	217
Weighted average shares outstanding for diluted earnings per share	76,884	77,286	76,962	77,411
Basic earnings per share	$ 0.96	$ 0.77	$ 3.06	$ 2.73
Diluted earnings per share	$ 0.96	$ 0.77	$ 3.06	$ 2.72
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3	20	48	14