Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Basic and Diluted [Abstract]
Net Income	$ 71,982	$ 72,098	$ 163,198	$ 161,468
Common share information:
Weighted average shares outstanding for basic earnings per share	76,202	76,879	76,354	76,926
Dilutive effect of stock options and restricted stock	78	56	142	75
Weighted average shares outstanding for diluted earnings per share	76,280	76,935	76,496	77,001
Basic earnings per share	$ 0.94	$ 0.94	$ 2.14	$ 2.10
Diluted earnings per share	$ 0.94	$ 0.94	$ 2.13	$ 2.10
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	21	50	21	37