Stock Compensation Plans - Stock option activity (Details) - Stock option - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024	Dec. 31, 2023
Options
Outstanding, Beginning of year	879,097	880,097	880,097	880,097	880,097	880,097
Granted
Exercised		1,000
Outstanding, end of year	879,097	879,097	880,097	880,097	879,097	880,097
Exercisable at end of year	218,460	175,019	43,441		218,460	43,441	175,019
Weighted Average Exercise Price
Outstanding, Beginning of year	$ 13.67	$ 13.67	$ 13.67	$ 13.67	$ 13.67	$ 13.67
Granted
Exercised		14.08
Outstanding, end of year	13.67	13.67	13.67	$ 13.67	13.67	13.67
Exercisable at end of year	$ 13.67	$ 13.67	$ 13.67		$ 13.67	$ 13.67	$ 13.67
Compensation cost recognized	$ 192,000		$ 192,000		$ 576,000	$ 576,000
Unrecognized compensation cost	$ 2,400,000				$ 2,400,000			$ 3,000,000.0
Period over which unrecognized compensation costs expected to recognized					3 years