Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income	$ 16,662	$ 23,056	$ 65,050	$ 75,161
Denominator:
Weighted-average shares outstanding (in shares)	48,047	46,824	47,737	46,138
Effect of dilutive securities (in shares)	4,191	5,184	3,900	4,964
Weighted-average diluted shares (in shares)	52,238	52,008	51,637	51,102
Basic net income per share (in dollars per share)	$ 0.35	$ 0.49	$ 1.36	$ 1.63
Diluted net income per share (in dollars per share)	$ 0.32	$ 0.44	$ 1.26	$ 1.47
Employee stock options and restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive outstanding equity awards (in shares)	1,287	175	1,235	627