CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 998	$ 638
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)	109,339,000	109,123,000
Common stock, shares, outstanding (shares)	99,839,000	101,885,000
Treasury stock, shares (shares)	9,500,000	7,238,000