Fair Value Measurements - Nonrecurring (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Assets and liabilities measured at fair value
Valuation allowance	$ 21,400,000
Carrying value of other real estate owned	1,255,000	$ 1,561,000	$ 2,374,000	$ 2,356,000
OREO Valuation allowance	853,000	856,000	$ 1,179,000	$ 1,179,000
Impaired Loans [Member]
Assets and liabilities measured at fair value
Valuation allowance		65,300,000
Impaired Loans [Member] | Reported Value Measurement [Member]
Assets and liabilities measured at fair value
Increase (decrease) of specific allocations within the provision for loan losses		12,200,000
Fair Value, Measurements, Nonrecurring [Member]
Assets and liabilities measured at fair value
Total	49,540,000	49,261,000
Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Assets and liabilities measured at fair value
Total	48,285,000	47,700,000
Valuation allowance	21,400,000	17,600,000
Increase (decrease) of specific allocations within the provision for loan losses	3,800,000
Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member] | Reported Value Measurement [Member]
Assets and liabilities measured at fair value
Total	69,600,000
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned [Member]
Assets and liabilities measured at fair value
Total	1,255,000	1,561,000
Carrying value of other real estate owned	1,300,000	1,600,000
Outstanding balance	2,200,000	2,500,000
OREO Valuation allowance	853,000	856,000
OREO participations	131,000	131,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets and liabilities measured at fair value
Total	49,540,000	49,261,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets and liabilities measured at fair value
Total	48,285,000	47,700,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member]
Assets and liabilities measured at fair value
Total	$ 1,255,000	$ 1,561,000