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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Treasury Stock
Balance at Dec. 31, 2020 $ 1,986,111 $ 481 $ 905,332 $ (46) $ 1,112,156 $ (31,812)
Balance, shares at Dec. 31, 2020   48,148,000        
Balance, shares at Dec. 31, 2020           (7,609,000)
Increase (Decrease) in Stockholders' Equity            
Net income $ 62,506       62,506  
Exercise of stock options and vesting of restricted stock units (in shares) 210,000         346,000
Exercise of stock options and vesting of restricted stock units $ 29,388   (1,623)     $ 31,011
Employee taxes paid for withheld shares upon equity award settlement (in shares)           (37,000)
Employee taxes paid for withheld shares upon equity award settlement (16,010)         $ (16,010)
Stock compensation $ 50,899   50,899      
Issuance of shares pursuant to employee stock purchase plan (in shares) 17,000         17,000
Issuance of shares pursuant to employee stock purchase plan $ 6,200   6,077     $ 123
Treasury stock purchases $ (12,975)         $ (12,975)
Treasury stock purchases (in shares) (32,000)         (32,000)
Purchase Consideration for Converted Stock $ 1,872   1,872      
Balance at Jun. 30, 2021 2,107,991 $ 481 962,557 (46) 1,174,662 $ (29,663)
Balance, shares at Jun. 30, 2021   48,148,000        
Balance, shares at Jun. 30, 2021           (7,315,000)
Balance at Mar. 31, 2021 2,060,993 $ 481 941,960 (46) 1,149,132 $ (30,534)
Balance, shares at Mar. 31, 2021   48,148,000        
Balance, shares at Mar. 31, 2021           (7,424,000)
Increase (Decrease) in Stockholders' Equity            
Net income $ 25,530       25,530  
Exercise of stock options and vesting of restricted stock units (in shares) 89,000         150,000
Exercise of stock options and vesting of restricted stock units $ 11,286   (9,544)     $ 20,830
Employee taxes paid for withheld shares upon equity award settlement (in shares)           (18,000)
Employee taxes paid for withheld shares upon equity award settlement (7,052)         $ (7,052)
Stock compensation $ 25,175   25,175      
Issuance of shares pursuant to employee stock purchase plan (in shares) 9,000         9,000
Issuance of shares pursuant to employee stock purchase plan $ 3,162   3,094     $ 68
Treasury stock purchases $ (12,975)         $ (12,975)
Treasury stock purchases (in shares) (32,000)         (32,000)
Purchase Consideration for Converted Stock $ 1,872   1,872      
Balance at Jun. 30, 2021 2,107,991 $ 481 962,557 (46) 1,174,662 $ (29,663)
Balance, shares at Jun. 30, 2021   48,148,000        
Balance, shares at Jun. 30, 2021           (7,315,000)
Balance at Dec. 31, 2021 $ 2,324,032 $ 481 1,075,650 (46) 1,273,614 $ (25,667)
Balance, shares at Dec. 31, 2021 48,147,969 48,148,000        
Balance, shares at Dec. 31, 2021 (6,832,640)         (6,833,000)
Increase (Decrease) in Stockholders' Equity            
Net income $ 79,930       79,930  
Unrealized gain (loss) on investment securities, net of tax $ (763)     (763)    
Exercise of stock options and vesting of restricted stock units (in shares) 101,000         279,000
Exercise of stock options and vesting of restricted stock units $ 16,223   (5,897)     $ 22,120
Employee taxes paid for withheld shares upon equity award settlement (in shares)           (50,000)
Employee taxes paid for withheld shares upon equity award settlement (20,330)         $ (20,330)
Stock compensation $ 51,079   51,079      
Issuance of shares pursuant to employee stock purchase plan (in shares) 20,000         20,000
Issuance of shares pursuant to employee stock purchase plan $ 8,156   7,989     $ 167
Treasury stock purchases $ 0          
Treasury stock purchases (in shares) 0          
Balance at Jun. 30, 2022 $ 2,458,327 $ 481 1,128,821 (809) 1,353,544 $ (23,710)
Balance, shares at Jun. 30, 2022 48,147,969 48,148,000        
Balance, shares at Jun. 30, 2022 (6,583,971)         (6,584,000)
Balance at Mar. 31, 2022 $ 2,387,734 $ 481 1,098,933 (743) 1,313,598 $ (24,535)
Balance, shares at Mar. 31, 2022   48,148,000        
Balance, shares at Mar. 31, 2022           (6,697,000)
Increase (Decrease) in Stockholders' Equity            
Net income 39,946       39,946  
Unrealized gain (loss) on investment securities, net of tax $ (66)     (66)    
Exercise of stock options and vesting of restricted stock units (in shares) 51,000         122,000
Exercise of stock options and vesting of restricted stock units $ 8,178   (288)     $ 8,466
Employee taxes paid for withheld shares upon equity award settlement (in shares)           (21,000)
Employee taxes paid for withheld shares upon equity award settlement (7,743)         $ (7,743)
Stock compensation $ 25,800   25,800      
Issuance of shares pursuant to employee stock purchase plan (in shares) 12,000         12,000
Issuance of shares pursuant to employee stock purchase plan $ 4,478   4,376     $ 102
Treasury stock purchases $ 0          
Treasury stock purchases (in shares) 0          
Balance at Jun. 30, 2022 $ 2,458,327 $ 481 $ 1,128,821 $ (809) $ 1,353,544 $ (23,710)
Balance, shares at Jun. 30, 2022 48,147,969 48,148,000        
Balance, shares at Jun. 30, 2022 (6,583,971)         (6,584,000)