XML 54 R31.htm IDEA: XBRL DOCUMENT v3.21.1
Stock-Based Incentive Plans (Tables)
3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Compensation, Stock Options, Activity
Stock-based incentive plans compensation expense is as follows (in thousands):
Three Months Ended March 31,
20212020
Service-based restricted stock units (“RSUs”)$4,842 $4,478 
Service-based stock appreciation rights (“SARs”)3,322 2,684 
Market performance-based restricted stock units763 896 
Operating performance-based restricted stock units 267 695 
Employee share purchase plan342 290 
Total stock-based compensation expense$9,536 $9,043 
Stock-based compensation agreements issued during the three months ended March 31, 2021, representing potential shares and their weighted average grant date fair values by type follows (shares in thousands, fair value in dollars):
Three Months Ended March 31, 2021
SharesWeighted Average Grant Date Fair Value
Service-based SARs594,617 $29.22 
Service-based RSUs322,310 $73.25 
Market performance-based RSUs47,916 $114.74 
Operating performance-based RSUs76,040 $73.25