Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 851	$ 588
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	150,000,000	150,000,000
Common stock, shares issued (shares)	109,089,000	108,833,000
Common stock, shares, outstanding (shares)	101,972,000	104,219,000
Treasury stock, shares (shares)	7,117,000	4,614,000