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Stockholders' Equity (Stock Awards and Units Activity) (Details)
9 Months Ended
Sep. 30, 2022
$ / shares
shares
Deferred And Restricted Stock Units  
Number of Shares  
Outstanding at beginning of period (in shares) | shares 285,711
Issued (in shares) | shares 3,923
Granted (in shares) | shares 156,919
Dividend equivalents (in shares) | shares 7,729
Forfeited (in shares) | shares (7,988)
Vested (in shares) | shares (168,203)
Outstanding at end of period (in shares) | shares 278,091
Weighted Average Price  
Outstanding at beginning of period (in usd per share) | $ / shares $ 110.41
Issued (in usd per share) | $ / shares 105.48
Granted (in usd per share) | $ / shares 120.64
Dividend equivalents (in usd per share) | $ / shares 107.15
Forfeited (in usd per share) | $ / shares 121.12
Vested (in usd per share) | $ / shares 95.98
Outstanding at end of period (in usd per share) | $ / shares $ 121.51
Stock Awards and Performance Stock Units  
Number of Shares  
Outstanding at beginning of period (in shares) | shares 149,961
Granted (in shares) | shares 91,988
Dividend equivalents (in shares) | shares 4,413
Forfeited (in shares) | shares (4,840)
Vested (in shares) | shares (80,938)
Outstanding at end of period (in shares) | shares 160,584
Weighted Average Price  
Outstanding at beginning of period (in usd per share) | $ / shares $ 104.01
Granted (in usd per share) | $ / shares 110.83
Dividend equivalents (in usd per share) | $ / shares 107.18
Forfeited (in usd per share) | $ / shares 78.11
Vested (in usd per share) | $ / shares 82.40
Outstanding at end of period (in usd per share) | $ / shares $ 120.12