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Stock-Based Compensation Plans - Summary of Nonvested TSRs (Details) - Total Shareholder Return Awards (TSRs)
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Number of Shares  
Nonvested, beginning balance (in shares) | shares 1,367,728
Granted (in shares) | shares 367,317
Vested (in shares) | shares (782,588)
Forfeited (in shares) | shares (153,681)
Change in payout rate (in shares) | shares 391,294
Nonvested, ending balance (in shares) | shares 1,190,070
Weighted Average Grant Date Fair Value  
Nonvested, beginning balance (in dollars per share) | $ / shares $ 34.59
Granted (in dollars per share) | $ / shares 50.60
Vested (in dollars per share) | $ / shares 31.31
Forfeited (in dollars per share) | $ / shares 38.57
Change in payout rate (in dollars per share) | $ / shares 31.31
Nonvested, ending balance (in dollars per share) | $ / shares $ 40.10