Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net Income	$ 15,996	$ 19,208
Weighted-average shares outstanding, basic (in shares)	27,702,000	28,544,000
Dilutive effect of share-based payments (in shares)	227,000	250,000
Weighted-average shares outstanding, diluted (in shares)	27,929,000	28,794,000
Net income per common share, basic (in dollars per share)	$ 0.58	$ 0.67
Net income per common share, diluted (in dollars per share)	$ 0.57	$ 0.67
Weighted average shares excluded from the computation of diluted earnings per share	587,728	227,720