Employee Benefit Plans, Restricted Stock Plan (Details) - Restricted Stock [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Deferred Compensation Arrangements [Abstract]
Number of shares authorized (in shares)	150,000		150,000
Number of shares available for grant (in shares)	113,449		113,449
Unvested Shares [Roll Forward]
Outstanding, beginning of period (in shares)	6,254		6,622
Granted (in shares)	367		2,609
Forfeited (in shares)	(52)		(213)
Vested (in shares)	(499)		(2,948)
Outstanding, end of period (in shares)	6,070		6,070
Weighted Average Market Price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 71.61		$ 63.63
Granted (in dollars per share)	81.58		83.13
Forfeited (in dollars per share)	(63.09)		(63.12)
Vested (in dollars per share)	(67.37)		(62.39)
Outstanding, end of period (in dollars per share)	$ 72.63		$ 72.63
Additional General Disclosures [Abstract]
Share-based compensation expense	$ 62,000	$ 68,000	$ 178,000	$ 210,000
Compensation cost related to nonvested awards that has not yet been recognized	$ 441,000		$ 441,000
Period over which compensation cost is expected to be recognized			3 years