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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Activity During 2021, the following units were granted for GAAP purposes:
Performance-based Award Units Granted in 2021Weighted Average
Grant Date
Fair Value
Per Share
2021 Performance Award Plan204,623$20.49
2020 Performance Award Plan385,455$19.98
2019 Performance Award Plan116,844$20.18