XML 96 R83.htm IDEA: XBRL DOCUMENT v3.22.0.1
Restricted Stock, Performance Share and Cash Awards - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Mar. 16, 2021
USD ($)
shares
Mar. 12, 2020
USD ($)
shares
Mar. 14, 2019
USD ($)
shares
Mar. 15, 2018
USD ($)
shares
Mar. 16, 2017
USD ($)
shares
Mar. 31, 2021
shares
Mar. 31, 2020
shares
Mar. 31, 2019
shares
Dec. 31, 2021
USD ($)
TIME
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
Mar. 31, 2018
shares
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Share-based compensation, shares outstanding | shares                 7,500,000 7,500,000 7,900,000    
Officer and Key Employees [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Performance awards period, years 1 year                        
Restricted Stock Units (RSUs) [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Shares granted in the period | shares           314,000 405,870 399,900 326,584 422,610 414,700    
Fair value of grants in period                 $ 40,100,000 $ 34,900,000 $ 31,800,000    
Share based payment award vesting date           Mar. 16, 2026 Mar. 12, 2025 Mar. 14, 2024          
Period of service from grant date stock options awarded not subject to forfeiture           2 years 2 years 2 years          
Restricted stock or unit expense                 $ 26,700,000 $ 23,000,000.0 20,100,000    
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Minimum [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Minimum age of employee with not subject to award forfeiture on condition compliance           55 years 55 years 55 years 55 years 55 years      
Unvested Restricted Stock [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Total intrinsic value                 $ 331,800,000 $ 243,400,000      
Equity awards with an aggregate fair value                 48,900,000 30,800,000      
Performance Shares [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Restricted stock or unit expense                 15,900,000 16,200,000 8,500,000    
Total intrinsic value                 64,300,000 39,100,000      
Equity awards with an aggregate fair value                 $ 19,100,000 $ 12,500,000 5,700,000    
Shares authorized | shares 67,000 82,500 73,600                    
Performance share awards approved, Fair value $ 8,600,000 $ 7,100,000 $ 5,800,000                    
Vesting period, years                 2 years 2 years      
2017 Performance Share Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Provisional awards, terms                 The 2021, 2020 and 2019 awards are subject to a three-year performance period that begins on January 1, 2021, 2020 and 2019, respectively, and vest on the three-year anniversary of the date of grant (March 16, 2024, March 12, 2023 and March 14, 2022).        
Cash-based compensation awards, expenses                     10,300,000 $ 8,700,000  
Performance awards expiration date         Jan. 01, 2020                
Cash Awards [Member] | Officer and Key Employees [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Provisional awards, terms                 The ultimate award value will be equal to the trailing twelve month price of our common stock on December 31, 2023, multiplied by the number of units subject to the award, but limited to between 0.5 and 1.5 times the original value of the units determined as of the grant date.        
Vesting period, years 3 years                        
Provisional compensation cash awards approved for future grant by compensation committee, value $ 18,800,000 $ 18,400,000 $ 16,500,000   $ 14,300,000                
Provisional compensation cash award approved for future grant by compensation committee, units | shares 147,000 213,000 206,800   255,000 208,000 200,000   143,000       242,000
Ultimate award value, multiples of original value of the units, minimum | TIME                 0.5        
Ultimate award value, multiples of original value of the units, maximum | TIME                 1.5        
Cash-based compensation awards, expenses                 $ 0        
2021 Provisional Cash Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Performance awards expiration date                 Jan. 01, 2024        
2020 Provisional Cash Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Cash-based compensation awards, expenses                 $ 12,600,000 $ 0      
Performance awards expiration date                 Jan. 01, 2023        
2019 Provisional Cash Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Cash-based compensation awards, expenses                 $ 11,500,000 10,600,000   0  
Performance awards expiration date                 Jan. 01, 2022        
2019 Provisional Cash Awards [Member] | Officer and Key Employees [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Provisional compensation cash awards approved for future grant by compensation committee, value       $ 15,000,000.0                  
Provisional compensation cash award approved for future grant by compensation committee, units | shares       219,000       190,000          
2018 Provisional Cash Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Provisional compensation cash award approved for future grant by compensation committee, units | shares                 176,300        
Cash-based compensation awards, expenses                 $ 17,700,000 $ 9,900,000 $ 8,900,000 $ 0  
Performance awards expiration date       Jan. 01, 2021                  
2016 Provisional Cash Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Provisional compensation cash award approved for future grant by compensation committee, units | shares                     341,000    
Cash-based compensation awards, expenses                     $ 22,400,000    
2017 Provisional Cash Awards [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Provisional compensation cash award approved for future grant by compensation committee, units | shares                   221,600      
Cash-based compensation awards, expenses                   $ 18,900,000      
Long Term Incentive Plan [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Share-based compensation, shares outstanding, Value                 $ 4,000,000.0        
Share-based compensation, shares outstanding | shares                 1,800,000        
Shares granted in the period | shares                 1,800,000        
Long Term Incentive Plan [Member] | Minimum [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Period of service from grant date stock options awarded not subject to forfeiture                 2 years 2 years 2 years    
Long Term Incentive Plan [Member] | Executive Officer [Member] | Minimum [Member]                          
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                          
Minimum age of employee with not subject to award forfeiture on condition compliance                 55 years 55 years 55 years