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Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income	$ 10,646	$ 14,595	$ 48,208	$ 19,891
Denominator:
Weighted-average shares outstanding (in shares)	49,988,000	49,425,000	49,845,000	49,285,000
Effect of dilutive securities (in shares)	1,570,000	2,254,000	1,712,000	2,805,000
Weighted-average diluted shares (in shares)	51,558,000	51,679,000	51,557,000	52,090,000
Basic net income per share (in dollars per share)	$ 0.21	$ 0.30	$ 0.97	$ 0.40
Diluted net income per share (in dollars per share)	$ 0.21	$ 0.28	$ 0.94	$ 0.38
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)	4,443,127	3,241,873	4,194,283	2,302,333

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