XML 65 R54.htm IDEA: XBRL DOCUMENT v3.22.1
STOCK-BASED COMPENSATION (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ (2,594,000) $ (2,147,000)  
Shares withheld for tax obligations 34,251 30,252  
Award Recipient Type Director [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 33,000 $ 3,000  
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of shares vested as of the vesting date $ 17,124,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Potential Grants in Future Period (minimum) 0    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Potential Grants in Future Period (maximum) 105,485    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 85,767   106,212
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in shares) $ 129.68   $ 116.38
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period [1],[2] 60,120    
Grant date fair value of shares issued (in dollars per share) [1],[2] $ 116.65    
Forfeited (in shares) 0    
Forfeited (per share) $ 0    
Vested (in shares) (80,565)    
Vested (per share) $ 102.42    
Fair value of shares granted, as of the grant dates $ 7,013,000    
Restricted Stock [Member] | Award Recipient Type Employee [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense 2,561,000 2,144,000  
Stock-based compensation costs capitalized as development costs $ 691,000 $ 550,000  
Company performance based award | Executive Officer [Member] | End of one-year performance period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 34.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Company performance based award | Executive Officer [Member] | Each of the following two years      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years    
Individual performance based award | Executive Officer [Member] | End of one-year performance period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 34.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Individual performance based award | Executive Officer [Member] | Each of the following two years      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years    
Total shareholder return | Executive Officer [Member] | Following year after performance period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00%    
Total shareholder return | Executive Officer [Member] | End of three-year performance period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 75.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Continuing employement awards | Executive Officer [Member] | Each year of 4-year service period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
[1] Does not include the restricted shares that may be earned if the performance goals established in 2020 and 2021 for long-term performance and in 2022 for annual and long-term performance are achieved. Depending on the actual level of achievement of the goals at the end of the open performance periods, the number of shares earned could range from zero to 105,485.
[2] Includes shares granted in prior years for which performance conditions have been satisfied and the number of shares have been determined.