Condensed Consolidated Balance Sheets (Unaudited) Parentheticals - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Receivables allowance	$ 2,723	$ 2,574
Accumulated depreciation	197,856	193,641
Accumulated Amortization	$ 39,420	$ 40,442
Treasury stock (in shares)	6,197,000	6,110,000
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	191,000	193,000
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	42,832,000	42,830,000