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Share Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of restricted stock units, performance-based stock units, and weighted average grant date fair values The summary of restricted stock units, performance-based stock units, and weighted average grant date fair values are as follows:
Employee Service-Based AwardsEmployee Performance-Based AwardsDirector Awards
UnitsWeighted Average Grant Date Fair ValueUnitsWeighted Average Grant Date Fair ValueUnitsWeighted Average Grant Date Fair Value
Nonvested at December 31, 20191,164,224 $16.32 599,484 $17.82 55,752 $20.10 
Granted427,851 21.81 523,972 25.95 70,623 17.07 
Vested(489,026)14.18 (541,923)24.36 (55,752)20.09 
Forfeited(21,289)18.97 (260,852)19.29 — — 
Nonvested at December 31, 20201,081,760 18.90 320,681 18.86 70,623 17.07 
Granted462,316 23.28 121,809 23.66 49,356 25.53 
Vested(433,499)17.55 (132,095)17.47 (70,623)17.07 
Forfeited(91,370)20.88 — — — — 
Nonvested at December 31, 20211,019,207 $21.28 310,395 $21.61 49,356 $25.53 
Summary of option activity and weighted average exercise prices The summary of option activity and weighted average exercise prices are as follows:
SharesWeighted Average Exercise PriceAggregate Intrinsic ValueWeighted Average Remaining Contractual Term (Years)
Outstanding at December 31, 2019523,105 $12.77 $7,762,878 
Granted— — 
Terminated— — 
Exercised(7,193)12.77 
Outstanding at December 31, 2020515,912 12.77 4,756,709 5.6
Granted— — 
Terminated— — 
Exercised(240,129)12.77 
Outstanding at December 31, 2021275,783 $12.77 $1,478,197 5.4