Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited)

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) - USD ($)
$ in Thousands
Total
Class A Common Stock
Class B Common Stock
Common​ Stock
Class A Common Stock
Common​ Stock
Class B Common Stock
Additional Paid-In Capital
Retained Earnings
Non-Controlling Interests
Beginning balance (in shares) at Dec. 31, 2021       20,723,912 40,333,019      
Beginning balance at Dec. 31, 2021 $ 920,013     $ 207 $ 403 $ 42,175 $ 877,194 $ 34
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation 1,272         1,272    
Dividend equivalents on unvested restricted stock units forfeited 0         (40) 40  
Net income (loss) 207,973           207,958 15
Ending balance (in shares) at Mar. 31, 2022       20,723,912 40,333,019      
Ending balance at Mar. 31, 2022 1,129,258     $ 207 $ 403 43,407 1,085,192 49
Beginning balance (in shares) at Dec. 31, 2021       20,723,912 40,333,019      
Beginning balance at Dec. 31, 2021 920,013     $ 207 $ 403 42,175 877,194 34
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income (loss) 343,629              
Ending balance (in shares) at Sep. 30, 2022       20,477,053 40,333,019      
Ending balance at Sep. 30, 2022 1,265,591     $ 205 $ 403 44,061 1,220,863 59
Beginning balance (in shares) at Mar. 31, 2022       20,723,912 40,333,019      
Beginning balance at Mar. 31, 2022 1,129,258     $ 207 $ 403 43,407 1,085,192 49
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation 1,728         1,728    
Dividend equivalents on unvested restricted stock units forfeited 0         (25) 25  
Vesting of restricted stock units (in shares)       34,055        
Repurchase and retirement of Class A common stock (in shares)       (141,952)        
Repurchase and retirement of Class A common stock (1,445)     $ (1)   (1,444)    
Net income (loss) 58,289           58,272 17
Ending balance (in shares) at Jun. 30, 2022       20,616,015 40,333,019      
Ending balance at Jun. 30, 2022 1,187,830     $ 206 $ 403 43,666 1,143,489 66
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation 1,917         1,917    
Repurchase and retirement of Class A common stock (in shares)       (138,962)        
Repurchase and retirement of Class A common stock (1,523)     $ (1)   (1,522)    
Net income (loss) 77,367           77,374 (7)
Ending balance (in shares) at Sep. 30, 2022       20,477,053 40,333,019      
Ending balance at Sep. 30, 2022 1,265,591     $ 205 $ 403 44,061 1,220,863 59
Beginning balance (in shares) at Dec. 31, 2022   20,583,130 40,333,019 20,583,130 40,333,019      
Beginning balance at Dec. 31, 2022 1,249,287     $ 206 $ 403 42,727 1,205,885 66
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation 1,756         1,756    
Vesting of restricted stock units (in shares)       333        
Shares of Class A common stock withheld related to net share settlement (in shares)       (137)        
Shares of Class A common stock withheld related to net share settlement (1)         (1)    
Repurchase and retirement of Class A common stock (in shares)       (50,166)        
Repurchase and retirement of Class A common stock (568)     $ (1)   (567)    
Net income (loss) (37,195)           (37,190) (5)
Ending balance (in shares) at Mar. 31, 2023       20,533,160 40,333,019      
Ending balance at Mar. 31, 2023 1,213,279     $ 205 $ 403 43,915 1,168,695 61
Beginning balance (in shares) at Dec. 31, 2022   20,583,130 40,333,019 20,583,130 40,333,019      
Beginning balance at Dec. 31, 2022 1,249,287     $ 206 $ 403 42,727 1,205,885 66
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Repurchase and retirement of Class A common stock (in shares)       (188,841)        
Net income (loss) 53,984              
Ending balance (in shares) at Sep. 30, 2023   20,558,055 40,333,019 20,558,055 40,333,019      
Ending balance at Sep. 30, 2023 1,276,977     $ 205 $ 403 47,529 1,228,361 479
Beginning balance (in shares) at Mar. 31, 2023       20,533,160 40,333,019      
Beginning balance at Mar. 31, 2023 1,213,279     $ 205 $ 403 43,915 1,168,695 61
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation 2,323         2,323    
Dividend equivalents on unvested restricted stock units forfeited 0         (23) 23  
Vesting of restricted stock units (in shares)       211,733        
Vesting of restricted stock units 0     $ 2   (2)    
Shares of Class A common stock withheld related to net share settlement (in shares)       (48,163)        
Shares of Class A common stock withheld related to net share settlement (523)         (523)    
Repurchase and retirement of Class A common stock (in shares)       (51,588)        
Repurchase and retirement of Class A common stock (550)     $ (1)   (549)    
Net income (loss) 36,936           36,936  
Ending balance (in shares) at Jun. 30, 2023       20,645,142 40,333,019      
Ending balance at Jun. 30, 2023 1,251,465     $ 206 $ 403 45,141 1,205,654 61
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation 2,338         2,338    
Dividends paid on Class A and Class B common stock ($0.50 per share) (30,479)           (30,479)  
Dividend equivalents on unvested restricted stock units, net of forfeitures 0         1,063 (1,063)  
Repurchase and retirement of Class A common stock (in shares)       (87,087)        
Repurchase and retirement of Class A common stock (1,014)     $ (1)   (1,013)    
Non-controlling interest related to consolidated joint venture 424             424
Net income (loss) 54,243           54,249 (6)
Ending balance (in shares) at Sep. 30, 2023   20,558,055 40,333,019 20,558,055 40,333,019      
Ending balance at Sep. 30, 2023 $ 1,276,977     $ 205 $ 403 $ 47,529 $ 1,228,361 $ 479