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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Balance at Dec. 31, 2020 $ 518,676 $ 16 $ 369,495 $ 149,165
Balance, shares at Dec. 31, 2020   15,826    
Issuance of shares of common stock under restricted stock award agreements, shares   75    
Stock-based compensation 2,239   2,239  
Shares issued for exercise of stock options 101   101  
Shares issued for exercise of stock options, shares   2    
Net income 8,894     8,894
Balance at Mar. 31, 2021 529,910 $ 16 371,835 158,059
Balance, shares at Mar. 31, 2021   15,903    
Balance at Dec. 31, 2021 574,344 $ 16 380,037 194,291
Balance, shares at Dec. 31, 2021   15,940    
Issuance of shares of common stock under restricted stock award agreements, shares   115    
Stock-based compensation 2,485   2,485  
Shares issued for exercise of stock options 479   479  
Shares issued for exercise of stock options, shares   13    
Net income 8,470     8,470
Balance at Mar. 31, 2022 $ 585,778 $ 16 $ 383,001 $ 202,761
Balance, shares at Mar. 31, 2022   16,068