Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Consolidated Balance Sheets [Abstract]
Accounts receivable, net allowance for doubtful accounts	$ 25,171	$ 19,258
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.004	$ 0.004
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	185,491,064	184,315,866
Common stock, shares outstanding	143,654,830	142,679,632
Treasury stock, shares held	41,836,234	41,636,234