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STOCK-BASED COMPENSATION AND EQUITY (Tables)
 3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Total Stock-Based Compensation Expense The following table details total stock-based compensation expense for the three months ended March 31, 2022 and 2021, included in the condensed consolidated statements of income:
Three Months Ended March 31,
(In thousands)20222021
Costs of sales$267 $213 
Operating expenses1,450 821 
Pre-tax stock-based compensation expense1,717 1,034 
Less: income tax effect(378)(227)
Net stock-based compensation expense$1,339 $807 
Summary of Restricted Stock Activity
A summary of restricted stock activity under the Plan during the three months ended March 31, 2022 and 2021 is as follows:
Three Months Ended March 31, 2022Three Months Ended March 31, 2021
SharesWeighted-Average
Grant Date
Fair Value Per Share		SharesWeighted-Average
Grant Date
Fair Value Per Share
Unvested restricted stock outstanding at beginning of period314,883 $29.79 412,967 $28.87 
Granted144,064 34.44 134,314 31.26 
Vested(174,943)29.75 (245,455)29.16 
Forfeited— — (6,329)29.10 
Unvested restricted stock outstanding at end of period284,004 $32.17 295,497 $29.71 
Summary of Performance Share Award Activity
A summary of performance share award activity under the Plan during the three months ended March 31, 2022 and 2021 is as follows, based on the target award amounts set forth in the performance share award agreements:
Three Months Ended March 31, 2022Three Months Ended March 31, 2021
SharesWeighted-Average
Grant Date
Fair Value Per Share		SharesWeighted-Average
Grant Date
Fair Value Per Share
Performance share awards outstanding at beginning of period249,952 $29.59 252,852 $29.27 
Granted101,799 37.98 93,444 31.26 
Forfeited or unearned(25,948)31.75 (20,373)29.92 
Earned and issued(27,317)31.75 (75,971)30.50 
Performance share awards outstanding at end of period298,486 $32.06 249,952 $29.59