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Stock-Based Compensation Plans Nonvested (Details) - Restricted Stock/RSUs/PSUs
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Nonvested as of December 31, 2019 | shares 1,425,021
Granted | shares 911,367
Vested | shares (357,838)
Forfeited | shares (81,170)
Nonvested as of December 31, 2020 | shares 1,897,380
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Roll Forward]  
Nonvested as of December 31, 2019 (usd per share) | $ / shares $ 16.39
Granted (usd per share) | $ / shares 11.82
Vested (usd per share) | $ / shares 17.88
Forfeited (usd per share) | $ / shares 13.74
Nonvested as of December 31, 2020 (usd per share) | $ / shares $ 14.07