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Stock Award Plans, Employee Plan Outstanding and Exercisable Options (Details) - Employee Stock Award Plan [Member] - Stock Options [Member]
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
$ / shares
shares
First Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, upper limit (in dollars per share) $ 51.23
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 56,207
Weighted Average Remaining Contractual Life 1 month 6 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 51.23
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 56,207
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 51.23
Second Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) 64.89
Range of Exercise Prices, upper limit (in dollars per share) $ 68.50
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 66,097
Weighted Average Remaining Contractual Life 1 year 4 months 24 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 67.65
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 66,097
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 67.65
Third Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) 73.29
Range of Exercise Prices, upper limit (in dollars per share) $ 75.50
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 267,156
Weighted Average Remaining Contractual Life 3 years 1 month 6 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 74.25
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 237,050
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 74.37
Fourth Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) $ 84.90
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 6,705
Weighted Average Remaining Contractual Life 3 years 3 months 18 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 84.90
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 6,705
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 84.90
Full Exercise Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) 51.23
Range of Exercise Prices, upper limit (in dollars per share) $ 84.90
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 396,165
Weighted Average Remaining Contractual Life 2 years 4 months 24 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 70.06
Aggregate Intrinsic Value, Options Outstanding | $ $ 737
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 366,059
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 69.80
Aggregate Intrinsic Value, Options Exercisable | $ $ 737