Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income	$ 14,816	$ 15,996
Weighted-average shares outstanding, basic (in shares)	25,523,000	27,702,000
Dilutive effect of share-based payments (in shares)	239,000	227,000
Weighted-average shares outstanding, diluted (in shares)	25,762,000	27,929,000
Net income per common share, basic (in dollars per share)	$ 0.58	$ 0.58
Net income per common share, diluted (in dollars per share)	$ 0.58	$ 0.57
Weighted average shares excluded from the computation of diluted earnings per share (in shares)	421,328	587,728