Stock Compensation Plans - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Available to Grant
Available to grant beginning of period	694,850	86,672	245,350
Available to grant end of period	487,600	694,850	86,672
Shares Under Option
Options outstanding at beginning of period	1,064,917	1,033,303	971,107
Granted	210,300	208,400	202,700
Exercised	(22,762)	(136,801)	(91,285)
Options outstanding at end of period	1,240,305	1,064,917	1,033,303
Weighted Average Exercise Price
Weighted Average Exercise Price beginning of period	$ 53.671	$ 50.528	$ 48.079
Exercised	38.830	42.149	40.532
Weighted Average Exercise Price, end of period	$ 53.857	$ 53.671	$ 50.528
2018 Plan
Available to Grant
Granted		(2,500)	(202,700)
Termination		(123,407)
Shares Under Option
Granted		2,500	202,700
Options outstanding at end of period	612,511
Weighted Average Exercise Price
Granted		$ 61.550	$ 57.980
2022 Plan
Available to Grant
Granted	(210,300)	(205,900)
Available to Grant from 2022 Plan		900,000
Shares Under Option
Granted	210,300	205,900
Options outstanding at end of period	412,400
Weighted Average Exercise Price
Granted	$ 53.166	$ 61.505
Current plans
Available to Grant
Forfeited	3,050	750	44,022
Shares Under Option
Forfeited	(3,050)	(750)	(44,022)
Weighted Average Exercise Price
Forfeited	$ 61.550	$ 61.550	$ 52.256
Terminated plans
Available to Grant
Forfeited		39,235
Shares Under Option
Forfeited	(9,100)	(39,235)	(5,197)
Weighted Average Exercise Price
Forfeited	$ 51.123	$ 52.523	$ 44.563
Employee Stock Option
Shares Under Option
Options outstanding at beginning of period	1,064,917
Granted	210,300
Exercised	(22,762)
Forfeited	(12,150)
Options outstanding at end of period	1,240,305	1,064,917
Options exercisable, end of period	571,490
Weighted Average Exercise Price
Weighted Average Exercise Price beginning of period	$ 53.671
Granted	53.166
Exercised	38.830
Forfeited	53.741
Weighted Average Exercise Price, end of period	53.857	$ 53.671
Weighted Average Exercise Price, exercisable, end of period	$ 51.688
Weighted Average Remaining Contractual Term	6 years 8 months 26 days	7 years 1 month 17 days
Weighted Average Remaining contractual Term, exercisable	4 years 7 months 20 days