XML 141 R122.htm IDEA: XBRL DOCUMENT v3.20.4
Performance Share Plan (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense $ 12,000    
Stock Issued During Period, Shares, Treasury Stock Reissued 14 44 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid $ 1,100 $ 2,860 $ 0
Restricted Stock and RSUs, total fair value of shares vested $ 2,199 $ 5,720 $ 0
Performance Goal - Percentile of Peer Group Performance 5500.00%    
Weighted-average recognition period 2 years    
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Share Award Payout, Cash Percentage 50.00%    
Performance Share Award Payout, Shares of Common Stock Percentage 50.00%    
The percentage paid in cash for the accrued equity portion of the performance share plan upon change in control 100.00%    
Unrecognized compensation expense $ 2,700    
Performance Shares, Number of Shares Authorized 36 36 49
Performance Share Award, Percentage of Target 112.35%    
Weighted Average Grant Date Fair Value (usd per share) $ 81.42 $ 68.72 $ 61.82
Blended volatility 18.00% 21.00% 21.00%
Historical volatility 50.00%    
Target shares, value $ 3,300    
Weighted-average recognition period 1 year 8 months 12 days    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 2,000    
Performance Shares | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Share Award, Percentage of Target 0.00% 0.00% 0.00%
Performance Shares | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Share Award, Percentage of Target 200.00% 200.00% 200.00%
Performance Shares, Equity Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Shares, Number of Shares Authorized 61 67  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 69.71 $ 64.32  
Performance Shares, Granted in Period 19    
Shares Forfeited (2)    
Forfeited (usd per share) $ 73.89    
Shares Vested (23)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 63.52    
Performance Shares, Liability Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Shares, Number of Shares Authorized 61 67  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 52.42    
Performance Shares, Granted in Period 19    
Shares Forfeited (2)    
Shares Vested (23)