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Equity and Long-Term Incentive Plans (Schedule of Restricted Stock Unit Activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Restricted stock units | 2011 Non-Employee Director Plan    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Granted, number of shares 29,916 54,535
Released/Vested, number of shares (25,133) (43,938)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Granted, weighted average fair value per stock unit at date of grant (in dollars per share) $ 64.43 $ 28.33
Released/Vested, weighted average fair value per stock unit at date of grant (in dollars per share) $ 48.94 $ 51.24
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Number of Shares [Roll Forward]    
Vested award beginning balance, number of shares 260,365 249,768
Vested award ending balance, number of shares 265,148 260,365
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Weighted Average Grant Date Fair Value [Abstract]    
Vested award beginning balance, weighted average fair value per stock unit at date of grant (in dollars per share) $ 49.45 $ 54.38
Vested award ending balance, weighted average fair value per stock unit at date of grant (in dollars per share) $ 51.19 $ 49.45
Restricted stock units | Parent Company    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Unvested award, beginning balance, number of shares 1,002,537 760,431
Granted, number of shares 380,731 824,946
Released/Vested, number of shares (427,852) (322,458)
Canceled/Forfeited, number of shares (66,323) (260,382)
Unvested award, ending balance, number of shares 889,093 1,002,537
Performance Stock Units | Parent Company    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Unvested award, beginning balance, number of shares 1,477,622 2,369,901
Granted, number of shares 300,936 335,472
Released/Vested, number of shares (823,510) (858,101)
Canceled/Forfeited, number of shares (28,192) (369,650)
Unvested award, ending balance, number of shares 926,856 1,477,622
Restricted Stock Units And Performance Shares | Parent Company    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Unvested award beginning balance, weighted average fair value per stock unit at date of grant (in dollars per share) $ 43.79 $ 57.89
Granted, weighted average fair value per stock unit at date of grant (in dollars per share) 71.25 25.78
Released/Vested, weighted average fair value per stock unit at date of grant (in dollars per share) 45.31 61.18
Canceled/Forfeited, weighted average fair value per stock unit at date of grant (in dollars per share) 45.43 48.57
Unvested award ending balance, weighted average fair value per stock unit at date of grant (in dollars per share) $ 52.97 $ 43.79