Shareholders' Equity Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income	$ 29,577	$ 115,484	$ 112,821
Average Shares Outstanding:
Weighted-average common shares outstanding for basic computation	39,254	40,892	41,942
Dilutive effect of potential common shares	212	295	389
Weighted-average common shares outstanding for dilutive computation	39,466	41,187	42,331
Net Income Per Share — Basic	$ 0.75	$ 2.82	$ 2.69
Net Income Per Share — Diluted	$ 0.75	$ 2.80	$ 2.67