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NET INCOME PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share The potential common shares that were considered anti-dilutive securities were excluded from the diluted earnings per share calculations for the relevant periods either because the sum of the exercise price per share and the unrecognized compensation cost per share was greater than the average market price of our common stock for the relevant periods, or because they were considered contingently issuable. The contingently issuable potential common shares result from certain stock options and restricted stock units granted to our employees that vest based on performance conditions, market conditions, or a combination of performance and market conditions.
The following table sets forth (in thousands) common shares considered anti-dilutive securities at December 31, 2021, 2020, and 2019:
 December 31, 2021December 31, 2020December 31, 2019
Options— 4 565 
Non-vested restricted stock units941 737 2,642 
Anti-dilutive potential common shares941 741 3,207