Significant Accounting Policies (Details 10) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Net (Loss) Income Per Common Share
Net income (loss)	$ 30,806	$ 28,170	$ 30,464	$ 28,967	$ 26,678	$ 20,843	$ 23,263	$ 14,999	$ 118,407	$ 85,783	$ 45,262
Weighted average shares outstanding (in shares)	85,056	87,355	89,942	91,183	91,916	92,414	92,839	93,410	88,398	92,648	93,586
Dilutive impact from:
Employee equity awards (in shares)									618	1,017	1,824
Dilutive weighted average shares outstanding (in shares)	85,585	87,853	90,471	91,891	92,710	93,365	93,816	94,522	89,016	93,665	95,410
Income per share
Basic (in dollars per share)	$ 0.36	$ 0.32	$ 0.34	$ 0.32	$ 0.29	$ 0.23	$ 0.25	$ 0.16	$ 1.34	$ 0.93	$ 0.48
Dilutive (in dollars per share)	$ 0.36	$ 0.32	$ 0.34	$ 0.32	$ 0.29	$ 0.22	$ 0.25	$ 0.16	$ 1.33	$ 0.92	$ 0.47