Investment (Unrealized Gain (Loss) on Investments) (Details) - USD ($)	Sep. 30, 2023	Jan. 01, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Amortized Cost	$ 144,540,000		$ 149,829,000
Gross Unrealized Gains			4,000
Gross Unrealized Losses	30,170,000		23,944,000
Fair Value	114,370,000	$ 125,889,000
Fair Value			125,889,000
Held-to-maturity securities, allowance for credit losses	45,000		0
OTTI in AOCL, pre 2016-13			(1,695,000)
Held-to-maturity Amortized cost	215,728,000	$ 245,659,000	235,659,000
Held-to-maturity Gross Unrealized Gains	126,000		947,000
Held-to-maturity Gross Unrealized Losses	39,028,000		33,526,000
Fair Value	176,826,000		203,080,000
US Treasury Securities [Member]
Schedule of Investments [Line Items]
Held-to-maturity Amortized cost	37,397,000		37,204,000
Held-to-maturity Gross Unrealized Losses	670,000		1,593,000
Fair Value	36,727,000		35,611,000
U.S. government agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	11,020,000		11,044,000
Gross Unrealized Losses	1,660,000		1,582,000
Fair Value	9,360,000
Fair Value			9,462,000
Held-to-maturity Amortized cost	67,944,000		67,734,000
Held-to-maturity Gross Unrealized Losses	14,411,000		13,261,000
Fair Value	53,533,000		54,473,000
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	42,073,000		45,052,000
Gross Unrealized Losses	8,704,000		7,651,000
Fair Value	33,369,000
Fair Value			37,401,000
Held-to-maturity Amortized cost	30,336,000		28,624,000
Held-to-maturity Gross Unrealized Gains			1,000
Held-to-maturity Gross Unrealized Losses	4,495,000		3,503,000
Fair Value	25,841,000		25,122,000
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost	36,722,000		37,393,000
Gross Unrealized Losses	9,667,000		6,661,000
Fair Value	27,055,000
Fair Value			30,732,000
Held-to-maturity Amortized cost	21,454,000		22,389,000
Held-to-maturity Gross Unrealized Losses	6,494,000		4,568,000
Fair Value	14,960,000		17,821,000
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	24,223,000		25,828,000
Gross Unrealized Losses	5,236,000		4,784,000
Fair Value	18,987,000
Fair Value			21,044,000
Held-to-maturity Amortized cost	53,994,000		57,085,000
Held-to-maturity Gross Unrealized Losses	12,114,000		10,001,000
Fair Value	41,880,000		47,084,000
Obligations of states and political subdivisions [Member]
Schedule of Investments [Line Items]
Amortized Cost	10,832,000		10,848,000
Gross Unrealized Gains			4,000
Gross Unrealized Losses	766,000		360,000
Fair Value	10,066,000
Fair Value			10,492,000
Held-to-maturity securities, allowance for credit losses	45,000
Held-to-maturity Amortized cost	4,603,000		22,623,000
Held-to-maturity Gross Unrealized Gains	126,000		946,000
Held-to-maturity Gross Unrealized Losses	844,000		600,000
Fair Value	3,885,000		22,969,000
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	1,000,000		1,000,000
Gross Unrealized Losses	251,000		113,000
Fair Value	749,000
Fair Value			887,000
Collateralized debt obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	18,670,000		18,664,000
Gross Unrealized Losses	3,886,000		2,793,000
Fair Value	$ 14,784,000
Fair Value			15,871,000
OTTI in AOCL, pre 2016-13			$ (1,695,000)