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Capital Stock and Equity Compensation (Time Based Restricted Stock Awards) (Details) - Time Based Restricted Stock - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Awards Outstanding      
Awards outstanding, beginning balance (in shares) 96,989 102,142 101,685
Awards granted (in shares) 96,620 50,640 58,807
Stock issued (in shares) (48,253) (46,329) (50,868)
Awards forfeited (in shares) (21,072) (9,464) (7,482)
Awards outstanding, ending balance (in shares) 124,284 96,989 102,142
Weighted- Average Grant Date Fair Value      
Awards outstanding, beginning balance (in dollars per share) $ 157.49 $ 120.16 $ 122.68
Awards granted (in dollars per share) 219.60 180.19 116.87
Stock issued (in dollars per share) 183.00 146.45 111.16
Awards forfeited (in dollars per share) 223.90 146.58 122.87
Awards outstanding, ending balance (in dollars per share) $ 194.60 $ 157.49 $ 120.16