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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Balance at beginning of period (in shares) at Dec. 31, 2019   20,643,738    
Balance at beginning of period at Dec. 31, 2019 $ 936,690 $ 4,284 $ 702,173 $ 230,233
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted common stock issued (in shares)   13,674    
Stock used for tax withholdings (in shares)   (2,330)    
Stock used for tax withholdings (61)   (61)  
Stock-based compensation 1,239   1,239  
Net income (loss) 78,551     78,551
Balance at end of period (in shares) at Mar. 31, 2020   20,655,082    
Balance at end of period at Mar. 31, 2020 1,016,419 $ 4,284 703,351 308,784
Balance at beginning of period (in shares) at Dec. 31, 2019   20,643,738    
Balance at beginning of period at Dec. 31, 2019 936,690 $ 4,284 702,173 230,233
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 42,900      
Balance at end of period (in shares) at Sep. 30, 2020   20,834,028    
Balance at end of period at Sep. 30, 2020 982,952 $ 4,282 705,537 273,133
Balance at beginning of period (in shares) at Mar. 31, 2020   20,655,082    
Balance at beginning of period at Mar. 31, 2020 1,016,419 $ 4,284 703,351 308,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted common stock issued (in shares)   228,149    
Stock used for tax withholdings (in shares)   (56,904)    
Stock used for tax withholdings (953) $ (2) (951)  
Stock-based compensation 1,474   1,474  
Net income (loss) (38,902)     (38,902)
Balance at end of period (in shares) at Jun. 30, 2020   20,826,327    
Balance at end of period at Jun. 30, 2020 978,038 $ 4,282 703,874 269,882
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted common stock issued (in shares)   10,849    
Stock used for tax withholdings (in shares)   (3,148)    
Stock used for tax withholdings (60)   (60)  
Stock-based compensation 1,723   1,723  
Net income (loss) 3,251     3,251
Balance at end of period (in shares) at Sep. 30, 2020   20,834,028    
Balance at end of period at Sep. 30, 2020 982,952 $ 4,282 705,537 273,133
Balance at beginning of period (in shares) at Dec. 31, 2020   20,839,227    
Balance at beginning of period at Dec. 31, 2020 1,045,252 $ 4,282 707,209 333,761
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted common stock issued (in shares)   109    
Stock used for tax withholdings (in shares)   (38)    
Exercise of stock options (in shares)   429    
Exercise of stock options 15   15  
Stock-based compensation 1,612   1,612  
Net income (loss) (119)     (119)
Balance at end of period (in shares) at Mar. 31, 2021   20,839,727    
Balance at end of period at Mar. 31, 2021 1,046,760 $ 4,282 708,836 333,642
Balance at beginning of period (in shares) at Dec. 31, 2020   20,839,227    
Balance at beginning of period at Dec. 31, 2020 1,045,252 $ 4,282 707,209 333,761
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 15,221      
Balance at end of period (in shares) at Sep. 30, 2021   30,858,813    
Balance at end of period at Sep. 30, 2021 1,417,250 $ 4,378 1,085,968 326,904
Balance at beginning of period (in shares) at Mar. 31, 2021   20,839,727    
Balance at beginning of period at Mar. 31, 2021 $ 1,046,760 $ 4,282 708,836 333,642
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance pursuant to acquisition (in shares) 9,802,166      
Issuance pursuant to acquisition $ 374,933 $ 98 374,835  
Restricted common stock issued (in shares)   261,539    
Stock used for tax withholdings (in shares)   (70,330)    
Stock used for tax withholdings (2,816) $ (2) (2,814)  
Exercise of stock options (in shares)   11,523    
Exercise of stock options 394   394  
Stock-based compensation 2,195   2,195  
Dividends declared (11,033)     (11,033)
Net income (loss) (25,319)     (25,319)
Balance at end of period (in shares) at Jun. 30, 2021   30,844,625    
Balance at end of period at Jun. 30, 2021 1,385,114 $ 4,378 1,083,446 297,290
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted common stock issued (in shares)   5,987    
Stock used for tax withholdings (in shares)   (1,725)    
Stock used for tax withholdings (74)   (74)  
Exercise of stock options (in shares)   9,926    
Exercise of stock options 307   307  
Stock-based compensation 2,289   2,289  
Dividends declared (11,045)     (11,045)
Net income (loss) 40,659     40,659
Balance at end of period (in shares) at Sep. 30, 2021   30,858,813    
Balance at end of period at Sep. 30, 2021 $ 1,417,250 $ 4,378 $ 1,085,968 $ 326,904