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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Allowance for doubtful accounts $ 4,869 $ 4,256
Common stock, par value (USD per share) $ 0.01 $ 0.01
Series A preferred stock    
Preferred stock, par value (USD per share) $ 100,000 $ 100,000
Preferred stock, shares outstanding (in shares) 6,000 6,000
Common stock, Class A    
Common stock, shares authorized (in shares) 240,000,000 240,000,000
Common stock, shares issued (in shares) 71,482,546 70,646,007
Common stock, shares outstanding (in shares) 71,482,546 70,646,007
Voting common stock    
Common stock, shares authorized (in shares) 60,000,000 60,000,000
Common stock, shares issued (in shares) 11,932,722 11,932,722
Common stock, shares outstanding (in shares) 11,932,722 11,932,722
Preferred Stock    
Preferred stock, par value (USD per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 25,000,000 25,000,000
Preferred stock, shares outstanding (in shares) 0 0