Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 1988	Dec. 31, 1987	Dec. 31, 2020	Dec. 31, 1985
Employee Benefit Plans
Amount borrowed						$ 2,000,000
Employee stock ownership plan debt structure interest rate description	prime rate
Employee stock ownership plan, term of loan	40 years
Employee stock ownership plan, amount of additional loan			$ 1,942,000	$ 1,942,000
Outstanding shares subject to repurchase obligation	0
ESOP, number of allocated shares since inception	374,786
ESOP, number of unallocated shares	41,270	56,635
ESOP, compensation expenses	$ 101,000	$ 101,000
Employer contribution	129,000
Other Postretirement Benefit Plans
Employee Benefit Plans
Future obligation of benefits	4,062,000	5,865,000			$ 2,529,000
Net loss to be amortized from AOCI to benefit cost	87,000
Benefit cost	$ 308,000	$ 188,000
Medical inflation rate for next year	10.00%
Grading down percentage for each year	0.50%
Floor rate	5.00%