Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share Diluted [Line Items]
Net income (loss)	$ (23,538)	$ 7,199	$ (61,276)	$ (1,866)
Weighted-average shares used in per share calculation - basic	119,555	117,544	119,891	117,456
Weighted-average shares used in per share calculation - basic and diluted	119,555	119,544	119,891	117,456
Net loss per share - basic and diluted
Net income (loss) per share - basic	$ (0.20)	$ 0.06	$ (0.51)	$ (0.02)
Net income (loss) per share - diluted	$ (0.20)	$ 0.06	$ (0.51)	$ (0.02)
Options to purchase common stock
Earnings Per Share Diluted [Line Items]
Effect of potentially dilutive shares		657
Restricted Stock Units (RSUs)
Earnings Per Share Diluted [Line Items]
Effect of potentially dilutive shares		1,129
Employee Stock Purchase Plan shares
Earnings Per Share Diluted [Line Items]
Effect of potentially dilutive shares		214