Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts receivable, trade, allowance for doubtful accounts	$ 9,581	$ 8,725
Property and equipment, accumulated depreciation	$ 390,887	$ 344,906
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	45,000,000	45,000,000
Preferred stock, shares issued (in shares)	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	360,000,000	360,000,000
Common stock, shares issued (in shares)	66,666,000	66,118,000
Common stock, shares outstanding (in shares)	32,073,000	31,525,000
Treasury stock (in shares)	34,593,000	34,593,000
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, shares issued (in shares)	11,484,000	11,484,000
Common stock, shares outstanding (in shares)	11,484,000	11,484,000