Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Basic and Diluted [Abstract]
Net Income	$ 83,551	$ 66,870
Common share information:
Weighted average shares outstanding for basic earnings per share	77,188	77,283
Dilutive effect of stock options and restricted stock	349	363
Weighted average shares outstanding for diluted earnings per share	77,537	77,646
Basic earnings per share	$ 1.08	$ 0.87
Diluted earnings per share	$ 1.08	$ 0.86
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0