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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)

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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