Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts	$ 12,220	$ 11,418
Current deferred financing costs	440	593
Noncurrent deferred financing costs	$ 30,341	$ 32,022
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, cumulative dividends (in dollars per share)	$ 63.80	$ 63.80
Preferred stock, shares authorized (in shares)	5,720	5,720
Preferred stock, shares outstanding (in shares)	5,720	5,720
Preferred stock, shares issued (in shares)	5,720	5,720
Shares held in treasury (in shares)	840,935	783,696
Class A CMN Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	362,500,000	362,500,000
Common stock, shares issued (in shares)	88,419,011	88,110,928
Common stock, shares outstanding (in shares)	87,578,076	87,327,232
Class B CMN Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	37,500,000	37,500,000
Common stock, shares issued (in shares)	14,420,085	14,420,085
Common stock, shares outstanding (in shares)	14,420,085	14,420,085