Fair Value Measurements, Measured On A Recurring And Nonrecurring Basis (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired loans, estimated selling cost	$ 67,000	$ 47,000
Recurring [Member]
Assets [Abstract]
Equity securities	2,444,000	2,270,000
Available for sale securities [Abstract]
U.S. Agency securities	74,532,000	73,945,000
U.S. Treasury securities	146,690,000	115,347,000
Obligations of state and political subdivisions	117,990,000	112,021,000
Corporate obligations	10,048,000	10,333,000
Mortgage-backed securities in government sponsored entities	112,211,000	100,756,000
Other Assets [Abstract]
Derivative instruments	10,816,000	4,011,000
Liabilities [Abstract]
Derivative instruments	(6,448,000)	(2,101,000)
Recurring [Member] | Level I [Member]
Assets [Abstract]
Equity securities	2,444,000	2,270,000
Available for sale securities [Abstract]
U.S. Agency securities	0	0
U.S. Treasury securities	146,690,000	115,347,000
Obligations of state and political subdivisions	0	0
Corporate obligations	0	0
Mortgage-backed securities in government sponsored entities	0	0
Other Assets [Abstract]
Derivative instruments	0	0
Liabilities [Abstract]
Derivative instruments	0	0
Recurring [Member] | Level II [Member]
Assets [Abstract]
Equity securities	0	0
Available for sale securities [Abstract]
U.S. Agency securities	74,532,000	73,945,000
U.S. Treasury securities	0	0
Obligations of state and political subdivisions	117,990,000	112,021,000
Corporate obligations	10,048,000	10,333,000
Mortgage-backed securities in government sponsored entities	112,211,000	100,756,000
Other Assets [Abstract]
Derivative instruments	10,816,000	4,011,000
Liabilities [Abstract]
Derivative instruments	(6,448,000)	(2,101,000)
Recurring [Member] | Level III [Member]
Assets [Abstract]
Equity securities	0	0
Available for sale securities [Abstract]
U.S. Agency securities	0	0
U.S. Treasury securities	0	0
Obligations of state and political subdivisions	0	0
Corporate obligations	0	0
Mortgage-backed securities in government sponsored entities	0	0
Other Assets [Abstract]
Derivative instruments	0	0
Liabilities [Abstract]
Derivative instruments	0	0
Nonrecurring [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	490,000	459,000
Other real estate owned	743,000	552,000
Nonrecurring [Member] | Level I [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	0	0
Other real estate owned	0	0
Nonrecurring [Member] | Level II [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	0	0
Other real estate owned	0	0
Nonrecurring [Member] | Level III [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	490,000	459,000
Other real estate owned	$ 743,000	$ 552,000