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Employee Benefit Plans, Restricted Stock Plan (Details) - Restricted Stock [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Deferred Compensation Arrangements [Abstract]
Number of shares authorized (in shares)	150,000		150,000
Number of shares available for grant (in shares)	116,898		116,898
Unvested Shares [Roll Forward]
Outstanding, beginning of period (in shares)	6,932		6,954
Granted (in shares)	2,414		2,493
Forfeited (in shares)	0		(40)
Vested (in shares)	(2,378)		(2,439)
Outstanding, end of period (in shares)	6,968		6,968
Weighted Average Market Price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 58.57		$ 58.51
Granted (in dollars per share)	67.85		67.69
Forfeited (in dollars per share)	0		58.01
Vested (in dollars per share)	(57.97)		(57.96)
Outstanding, end of period (in dollars per share)	$ 61.99		$ 61.99
Additional General Disclosures [Abstract]
Share-based compensation expense	$ 65,000	$ 76,000	$ 142,000	$ 160,000
Compensation cost related to nonvested awards that has not yet been recognized	$ 432,000		$ 432,000
Period over which compensation cost is expected to be recognized			3 years

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