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, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share, Basic [Abstract]
Net income	$ 6,971	$ 16,662	$ 34,689	$ 13,699	$ 26,702	$ 23,056	$ 31,242	$ 20,863	$ 72,021	$ 101,863	$ 54,157
Less: Undistributed earnings allocated to participating securities									0	0	(36)
Net income attributable to common shares-basic									$ 72,021	$ 101,863	$ 54,121
Weighted-average number of common shares used to compute basic net income per common share (in shares)									47,917	46,434	43,599
Basic net income per common share (in dollars per share)	$ 0.14	$ 0.35	$ 0.73	$ 0.29	$ 0.56	$ 0.49	$ 0.68	$ 0.46	$ 1.50	$ 2.19	$ 1.24
Earnings Per Share, Diluted [Abstract]
Less: Undistributed earnings allocated to participating securities									$ 0	$ 0	$ (34)
Net income attributable to common shared-diluted									$ 72,021	$ 101,863	$ 54,123
Dilutive effect of options and restricted stock units to purchase common stock (in shares)									3,919	3,660	2,913
Weighted-average number of common shares used to compute diluted net income per common share (in shares)									51,836	50,094	46,512
Diluted net income per common share (in dollars per share)	$ 0.13	$ 0.32	$ 0.67	$ 0.27	$ 0.51	$ 0.44	$ 0.61	$ 0.42	$ 1.39	$ 2.03	$ 1.16
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)									1,196	3,805	3,465