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Securities (Tables)
 9 Months Ended
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Securities
The amortized cost, gross unrealized gains and losses, and fair values of available-for-sale and held-to-maturity debt securities by type follows as of:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
 Fair
 Value
September 30, 2023
Available-for-sale:
U.S. treasury$58,478 $— $(5,625)$52,853 
U.S. agency2,089 — (34)2,055 
Obligations of states and political subdivisions29,941 — (5,453)24,488 
Mortgage backed - residential118,975 — (18,422)100,553 
Collateralized mortgage obligations208,949 — (24,492)184,457 
Mortgage backed - commercial134,990 — (18,079)116,911 
Other debt16,787 — (2,112)14,675 
Total available-for-sale$570,209 $— $(74,217)$495,992 
Held-to-maturity:
Obligations of states and political subdivisions$25,500 $— $(5,473)$20,027 
Mortgage backed - residential7,859 — (815)7,044 
Collateralized mortgage obligations4,051 — (330)3,721 
Total held-to-maturity$37,410 $— $(6,618)$30,792 
December 31, 2022
Available-for-sale:
U.S. treasury$62,010 $— $(5,361)$56,649 
U.S. agency2,881 — (47)2,834 
Obligations of states and political subdivisions29,897 — (4,998)24,899 
Mortgage backed - residential129,955 6 (13,826)116,135 
Collateralized mortgage obligations225,559 — (21,294)204,265 
Mortgage backed - commercial130,997 — (13,661)117,336 
Other debt16,774 — (1,919)14,855 
Total available-for-sale$598,073 $6 $(61,106)$536,973 
Held-to-maturity:
Obligations of states and political subdivisions$25,378 $5 $(4,891)$20,492 
Mortgage backed - residential8,705 4 (511)8,198 
Collateralized mortgage obligations4,818 — (290)4,528 
Total held-to-maturity$38,901 $9 $(5,692)$33,218 
Schedule of Held-to-maturity Securities
The amortized cost, gross unrealized gains and losses, and fair values of available-for-sale and held-to-maturity debt securities by type follows as of:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
 Fair
 Value
September 30, 2023
Available-for-sale:
U.S. treasury$58,478 $— $(5,625)$52,853 
U.S. agency2,089 — (34)2,055 
Obligations of states and political subdivisions29,941 — (5,453)24,488 
Mortgage backed - residential118,975 — (18,422)100,553 
Collateralized mortgage obligations208,949 — (24,492)184,457 
Mortgage backed - commercial134,990 — (18,079)116,911 
Other debt16,787 — (2,112)14,675 
Total available-for-sale$570,209 $— $(74,217)$495,992 
Held-to-maturity:
Obligations of states and political subdivisions$25,500 $— $(5,473)$20,027 
Mortgage backed - residential7,859 — (815)7,044 
Collateralized mortgage obligations4,051 — (330)3,721 
Total held-to-maturity$37,410 $— $(6,618)$30,792 
December 31, 2022
Available-for-sale:
U.S. treasury$62,010 $— $(5,361)$56,649 
U.S. agency2,881 — (47)2,834 
Obligations of states and political subdivisions29,897 — (4,998)24,899 
Mortgage backed - residential129,955 6 (13,826)116,135 
Collateralized mortgage obligations225,559 — (21,294)204,265 
Mortgage backed - commercial130,997 — (13,661)117,336 
Other debt16,774 — (1,919)14,855 
Total available-for-sale$598,073 $6 $(61,106)$536,973 
Held-to-maturity:
Obligations of states and political subdivisions$25,378 $5 $(4,891)$20,492 
Mortgage backed - residential8,705 4 (511)8,198 
Collateralized mortgage obligations4,818 — (290)4,528 
Total held-to-maturity$38,901 $9 $(5,692)$33,218 
Schedule of Fair Value and Unrealized Losses on Debt Securities in Continuous Unrealized Loss Position
Fair value and unrealized losses on debt securities by type and length of time in a continuous unrealized loss position without an allowance for credit losses were as follows:
Less than 12 months12 months or longerTotal
Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Number
of
Securities
September 30, 2023
Available-for-sale:
U.S. treasury$— $— $52,853 $(5,625)$52,853 $(5,625)9 
U.S. agency— — 2,055 (34)2,055 (34)7 
Obligations of states and political subdivisions— — 24,488 (5,453)24,488 (5,453)19 
Mortgage backed - residential320 (4)100,233 (18,418)100,553 (18,422)88 
Collateralized mortgage obligations— — 184,457 (24,492)184,457 (24,492)66 
Mortgage backed - commercial5,086 (115)111,825 (17,964)116,911 (18,079)25 
Other debt— — 14,675 (2,112)14,675 (2,112)9 
Total available-for-sale$5,406 $(119)$490,586 $(74,098)$495,992 $(74,217)223 
Held-to-maturity:
Obligations of states and political subdivisions$329 $(4)$19,698 $(5,469)$20,027 $(5,473)9
Mortgage backed - residential135 — 6,888 (815)7,023 (815)13
Collateralized mortgage obligations— — 3,721 (330)3,721 (330)5
Total held-to-maturity$464 $(4)$30,307 $(6,614)$30,771 $(6,618)27
Less than 12 months12 months or longerTotal
Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Number
of
Securities
December 31, 2022
Available-for-sale:
U.S. treasury$25,702 $(967)$30,947 $(4,394)$56,649 $(5,361)10 
U.S. agency— — 2,834 (47)2,834 (47)7 
Obligations of states and political subdivisions21,676 (3,784)2,753 (1,214)24,429 (4,998)18 
Mortgage backed - residential51,921 (2,939)63,691 (10,887)115,612 (13,826)87 
Collateralized mortgage obligations111,360 (4,631)92,905 (16,663)204,265 (21,294)66 
Mortgage backed - commercial70,710 (6,475)46,626 (7,186)117,336 (13,661)22 
Other debt14,855 (1,919)— — 14,855 (1,919)9 
Total available-for-sale$296,224 $(20,715)$239,756 $(40,391)$535,980 $(61,106)219 
Held-to-maturity:
Obligations of states and political subdivisions$20,153 $(4,891)$— $— $20,153 $(4,891)8
Mortgage backed - residential7,993 (511)— — 7,993 (511)10
Collateralized mortgage obligations4,127 (275)401 (15)4,528 (290)5
Total held-to-maturity$32,273 $(5,677)$401 $(15)$32,674 $(5,692)23
Schedule of Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity
Amortized
Cost		Estimated
Fair
Value
Available-for-sale:
Due within 1 year$14,995 $14,726 
Due after 1 year through 5 years61,708 55,491 
Due after 5 years through 10 years146,294 127,028 
Due after 10 years347,212 298,747 
Total available-for-sale$570,209 $495,992 
Held-to-maturity:
Due after 1 year through 5 years$1,026 $983 
Due after 5 years through 10 years757 711 
Due after 10 years35,627 29,098 
Total held-to-maturity$37,410 $30,792