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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Balance at Dec. 31, 2019 $ 824,953 $ 1,161 $ 574,955 $ 248,837
Balance, shares at Dec. 31, 2019   116,052    
Vesting of restricted stock units   $ 6 (6)  
Vesting of restricted stock units, shares   579    
Stock-based compensation expense 3,254   3,254  
Exercise of stock options 398   398  
Exercise of stock options, shares   82    
Shares withheld for restricted stock units vested (3,834) $ (2) (3,832)  
Shares withheld for restricted stock units vested, shares   (168)    
Net income 8,767     8,767
Balance at Mar. 31, 2020 833,538 $ 1,165 574,769 257,604
Balance, shares at Mar. 31, 2020   116,545    
Balance at Dec. 31, 2020 $ 1,152,783 $ 1,168 589,241 562,374
Balance, shares at Dec. 31, 2020 116,829 116,829    
Merger consideration $ 3,658,362 $ 896 3,657,466  
Merger consideration, shares   89,586    
Vesting of restricted stock units   $ 6 (6)  
Vesting of restricted stock units, shares   648    
Stock-based compensation expense 10,402   10,402  
Exercise of stock options 235 $ 1 234  
Exercise of stock options, shares   27    
Shares withheld for restricted stock units vested (10,417) $ (2) (10,415)  
Shares withheld for restricted stock units vested, shares   (232)    
Net income 172,580     172,580
Balance at Mar. 31, 2021 $ 4,983,945 $ 2,069 $ 4,246,922 $ 734,954
Balance, shares at Mar. 31, 2021 206,858 206,858