XML 105 R62.htm IDEA: XBRL DOCUMENT v3.22.0.1
SHARE-BASED PAYMENTS SHARE-BASED PAYMENTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common Stock, Capital Shares Reserved for Future Issuance 8,500,000    
Number of Shares Available for Issuance 5,500,000    
Forfeiture rate maximum (in hundredths) 3.00%    
Allocated share-based compensation expense $ 54,100 $ 29,400 $ 46,500
Tax Benefit $ 14,400 $ 14,100 $ 31,700
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award Vesting Period 3 years    
Nonvested Award, Cost Not yet Recognized, Amount $ 19,300    
Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 9 months 18 days    
Nonvested, number of units 779,937 646,287  
Granted, units 417,212    
Released to participants, units (242,765)    
Forfeited, units (40,797)    
Nonvested, Weighted Average Grant Date Fair Value $ 59.02 $ 63.85  
Grants in Period, Weighted Average Grant Date Fair Value 46.84 $ 76.49 $ 58.07
Vested in Period, Weighted Average Grant Date Fair Value 51.57    
Forfeitures, Weighted Average Grant Date Fair Value $ 55.27    
Granted in Period, Fair Value $ 19,542 $ 16,552 $ 15,238
Vested in Period, Fair Value $ 12,519 $ 11,204 $ 10,691
Performance-Unit Activity      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Award, Description Upon vesting, a holder of outstanding performance units is entitled to receive a number of shares of our common stock equal to a percentage (0% to 200%) of the performance units granted, based on our total shareholder return over the vesting period, compared with the total shareholder return of a peer group of other energy companies over the same period.    
Award Vesting Period 3 years    
Nonvested Award, Cost Not yet Recognized, Amount $ 31,700    
Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 9 months 18 days    
Nonvested, number of units 976,585 834,246  
Granted, units 542,183    
Released to participants, units (311,907)    
Forfeited, units (87,937)    
Nonvested, Weighted Average Grant Date Fair Value $ 72.73 $ 75.96  
Grants in Period, Weighted Average Grant Date Fair Value 62.03 $ 88.43 $ 68.02
Vested in Period, Weighted Average Grant Date Fair Value 64.00    
Forfeitures, Weighted Average Grant Date Fair Value $ 68.37    
Granted in Period, Fair Value $ 33,632 $ 25,028 $ 23,020
Vested in Period, Fair Value $ 19,962 $ 17,722 $ 15,018
Volatility 60.30% 21.70% 27.10%
Dividend yield 8.13% 4.87% 5.05%
Risk-free interest rate 0.21% 1.39% 2.47%
Employee Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common Stock, Capital Shares Reserved for Future Issuance 11,600,000    
Maximum allowable percentage of annual base pay withheld to purchase our common stock 10.00%    
Purchase price percentage of the lower of its grant date or exercise date market price 85.00%    
Employee participation in the plan (in hundredths) 69.00% 68.00% 62.00%
Shares sold under the Employee Stock Purchase Plan 277,012 359,977 171,590
Weighted Average Share Price of Shares Sold Under the Employee Stock Purchase Plan (In Dollars per Share) $ 38.98 $ 27.78 $ 51.24
Employee Stock Award Program [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common Stock, Capital Shares Reserved for Future Issuance 900,000    
Allocated share-based compensation expense   $ 200 $ 1,000
Shares Awarded Under Employee Stock Award Program 0 2,871 14,022
Share Price of Next Award to be Issued Under the Employee Stock Award Program $ 78    
Non-employees and Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum Value of Shares For Which Awards May Be Issued To A Participant During Any Year $ 800    
Granted, units 0    
Options, Outstanding, Number 0