Organization and Summary of Significant Accounting Policies - Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income									$ 84,308	$ 71,918	$ 46,165
Denominator:
Weighted-average shares outstanding (in shares)									50,987	49,917	49,345
Effect of dilutive securities (in shares)									1,851	1,799	2,806
Weighted-average diluted shares (in shares)									52,838	51,716	52,151
Basic net income per common share (in dollars per share)	$ 0.35	$ 0.31	$ 0.47	$ 0.52	$ 0.47	$ 0.21	$ 0.37	$ 0.39	$ 1.65	$ 1.44	$ 0.94
Diluted net income per common share (in dollars per share)	$ 0.34	$ 0.29	$ 0.46	$ 0.51	$ 0.46	$ 0.21	$ 0.36	$ 0.37	$ 1.60	$ 1.39	$ 0.89
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)									2,208	3,758	2,221