Stock Award Plans, Employee Plan Outstanding and Exercisable Options (Details) - Employee Stock Award Plan [Member] - Employee Stock Option [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares
First Price Range [Member]
Outstanding and Exercisable Stock options [Abstract]
Range of Exercise Prices, upper limit (in dollars per share)	$ 73.29
Options Outstanding [Abstract]
Number Outstanding (in shares) | shares	70,038
Weighted Average Remaining Contractual Life	1 year 1 month 6 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 73.29
Options Exercisable [Abstract]
Number Exercisable (in shares) | shares	70,038
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 73.29
Second Price Range [Member]
Outstanding and Exercisable Stock options [Abstract]
Range of Exercise Prices, lower limit (in dollars per share)	$ 73.93
Options Outstanding [Abstract]
Number Outstanding (in shares) | shares	54,879
Weighted Average Remaining Contractual Life	6 months
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 73.93
Options Exercisable [Abstract]
Number Exercisable (in shares) | shares	54,879
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 73.93
Third Price Range [Member]
Outstanding and Exercisable Stock options [Abstract]
Range of Exercise Prices, lower limit (in dollars per share)	$ 75.5
Options Outstanding [Abstract]
Number Outstanding (in shares) | shares	5,931
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 75.5
Options Exercisable [Abstract]
Number Exercisable (in shares) | shares	5,931
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 75.5
Full Exercise 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)	$ 75.5
Options Outstanding [Abstract]
Number Outstanding (in shares) | shares	130,848
Weighted Average Remaining Contractual Life	1 year 7 months 6 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 73.66
Aggregate Intrinsic Value, Options Outstanding | $	$ 4,206
Options Exercisable [Abstract]
Number Exercisable (in shares) | shares	130,848
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 73.66
Aggregate Intrinsic Value, Options Exercisable | $	$ 4,206