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WEIGHTED AVERAGE SHARE COUNTS | 3 Months Ended
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Mar. 31, 2022
Weighted Average Share Counts |
NET INCOME PER SHARE | (12)WEIGHTED AVERAGE SHARE COUNTS ​ The following table sets forth the computation of basic and diluted shares for the periods indicated (in thousands):
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended March 31,
​ |  |  | 2022 |  | 2021
​ | ​ | ​ | ​ | ​ | ​
Shares used in basic earnings per share calculation | ​ |  | 47,005 |  | 46,743
Effect of dilutive securities: | ​ | ​ | ​ | ​ | ​
Restricted stock units | ​ |  | 350 |  | 612
Performance-based restricted stock units | ​ |  | 26 |  | —
Total effects of dilutive securities | ​ |  | 376 |  | 612
Shares used in dilutive earnings per share calculation | ​ |  | 47,381 |  | 47,355
​ For the three months ended March 31, 2022 and 2021, there were Restricted Stock Units (“RSUs”) of 193 thousand and zero, respectively, outstanding which were excluded from the computation of diluted net income per share because the effect would have been anti-dilutive.

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