Condensed Consolidated Balance Sheets (Unaudited) Parentheticals - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Receivables allowance	$ 998	$ 1,121
Accumulated depreciation	195,681	191,757
Accumulated Amortization	$ 46,099	$ 41,796
Treasury stock (in shares)	6,243,000	6,148,000
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)	181,000	188,000
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)	42,842,000	42,835,000