Significant Accounting Policies (Details 7) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Net (Loss) Income per Common Share
Net (loss) income	$ 26,678	$ 20,843	$ 23,263	$ 14,999	$ 20,399	$ 10,513	$ 9,937	$ 4,413	$ 85,783	$ 45,262	$ (13,808)
Weighted average shares outstanding (in shares)	91,916	92,414	92,839	93,410	93,680	93,730	93,512	93,428	92,648	93,586	93,780
Dilutive impact from:
Employee equity awards (in shares)									1,017	1,824	0
Dilutive weighted average shares outstanding (in shares)	92,710	93,365	93,816	94,522	95,257	95,400	95,463	95,670	93,665	95,410	93,780
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.29	$ 0.23	$ 0.25	$ 0.16	$ 0.28	$ 0.11	$ 0.11	$ 0.05	$ 0.93	$ 0.48	$ (0.15)
Diluted (in dollars per share)	$ 0.29	$ 0.22	$ 0.25	$ 0.16	$ 0.28	$ 0.11	$ 0.10	$ 0.05	$ 0.92	$ 0.47	$ (0.15)
Employee Equity Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Employee equity awards (in shares)									291	443	6,554