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Investment Securities (Tables)
 12 Months Ended
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost and Estimated Fair Value of Held to Maturity Securities and Available for Sale Securities by Contractual Maturity
The following tables show the amortized cost, the estimated fair value and the allowance for credit losses of the held-to-maturity securities and available-for-sale securities at December 31, 2024 and 2023, by contractual maturity within each type:
 At December 31, 2024
(Dollars in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Allowance for Credit LossesFair Value
Securities Held-to-Maturity
Residential mortgage-backed securities:
After 1 year to 5 years$1,114 $— $(24)$— $1,090 
After 5 years to 10 years10,208 — (450)— 9,758 
Over 10 years122,789 — (18,630)— 104,159 
134,111 — (19,104)— 115,007 
Total$134,111 $— $(19,104)$— $115,007 
Securities Available-for-Sale
State and political subdivisions:
Within 1 year$1,300 $— $(5)$— $1,295 
1,300 — (5)— 1,295 
Residential mortgage-backed securities:
Within 1 year20 — — — 20 
After 1 year to 5 years298 — (6)— 292 
After 5 years to 10 years11,260 — (791)— 10,469 
Over 10 years311,126 119 (38,645)— 272,600 
322,704 119 (39,442)— 283,381 
Collateralized mortgage obligations:
After 1 year to 5 years155 — (4)— 151 
Over 10 years1,663 — (129)— 1,534 
1,818 — (133)— 1,685 
Corporate bonds:
Within 1 year5,905 5 (58)(6)5,846 
After 1 year to 5 years10,924 16 (303)(31)10,606 
After 5 years to 10 years60,000 — (4,650)(802)54,548 
76,829 21 (5,011)(839)71,000 
Total$402,651 $140 $(44,591)$(839)$357,361 
 At December 31, 2023
(Dollars in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Allowance for Credit LossesFair Value
Securities Held-to-Maturity
Residential mortgage-backed securities:
After 1 year to 5 years$1,871 $— $(62)$— $1,809 
After 5 years to 10 years12,047 — (462)— 11,585 
Over 10 years131,859 — (16,976)— 114,883 
145,777 — (17,500)— 128,277 
Total$145,777 $— $(17,500)$— $128,277 
Securities Available-for-Sale
State and political subdivisions:
Within 1 year$1,030 $— $(1)$— $1,029 
After 1 year to 5 years1,298 — (26)— 1,272 
2,328 — (27)— 2,301 
Residential mortgage-backed securities:
After 1 year to 5 years567 — (20)— 547 
After 5 years to 10 years13,653 — (964)— 12,689 
Over 10 years285,628 131 (34,443)— 251,316 
299,848 131 (35,427)— 264,552 
Collateralized mortgage obligations:
After 5 years to 10 years241 — (11)— 230 
Over 10 years1,960 — (189)— 1,771 
2,201 — (200)— 2,001 
Corporate bonds:
Within 1 year18,011 1 (176)(27)17,809 
After 1 year to 5 years13,339 23 (671)(43)12,648 
After 5 years to 10 years60,000 — (7,097)(661)52,242 
91,350 24 (7,944)(731)82,699 
Total$395,727 $155 $(43,598)$(731)$351,553 
Information Related to Sales of Securities Available-for-Sale
The following table presents information related to sales of securities available-for-sale during the years ended December 31, 2024, 2023 and 2022:
 For the Years Ended December 31,
(Dollars in thousands)202420232022
Securities available-for-sale:
Proceeds from sales$505 $— $1,530 
Gross realized gains on sales18 — 30 
Tax expense related to net realized gains on sales4 — 6 
Schedule of Securities in Unrealized Loss Position
The following table shows the fair value of securities that were in an unrealized loss position for which an allowance for credit losses has not been recorded at December 31, 2024 and 2023, by the length of time those securities were in a continuous loss position.
 Less than
Twelve Months		Twelve Months
or Longer		Total
(Dollars in thousands)Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses		Fair ValueUnrealized
Losses
At December 31, 2024
Securities Held-to-Maturity
Residential mortgage-backed securities$2,566 $(50)$112,441 $(19,054)$115,007 $(19,104)
Total$2,566 $(50)$112,441 $(19,054)$115,007 $(19,104)
Securities Available-for-Sale
Residential mortgage-backed securities$65,044 $(905)$205,071 $(38,537)$270,115 $(39,442)
Collateralized mortgage obligations— — 1,685 (133)1,685 (133)
Total$65,044 $(905)$206,756 $(38,670)$271,800 $(39,575)
At December 31, 2023
Securities Held-to-Maturity
Residential mortgage-backed securities$6,005 $(94)$122,272 $(17,406)$128,277 $(17,500)
Total$6,005 $(94)$122,272 $(17,406)$128,277 $(17,500)
Securities Available-for-Sale
State and political subdivisions$1,029 $(1)$— $— $1,029 $(1)
Residential mortgage-backed securities16,992 (65)238,053 (35,362)255,045 (35,427)
Collateralized mortgage obligations— — 2,001 (200)2,001 (200)
Corporate bonds780 (1)— — 780 (1)
Total$18,801 $(67)$240,054 $(35,562)$258,855 $(35,629)
Available-for-sale Securities, Allowance for Credit Loss Rollforward
The table below presents a rollforward by major security type for the years ended December 31, 2024 and 2023 of the allowance for credit losses on securities available-for-sale.

(Dollars in thousands)Corporate Bonds
For the Year Ended December 31, 2024
Securities Available-for-Sale
Beginning balance$(731)
Additions for securities for which no previous expected credit losses were recognized(3)
Change in securities for which a previous expected credit loss was recognized(105)
Ending balance$(839)
For the Year Ended December 31, 2023
Securities Available-for-Sale
Beginning balance$(1,140)
Additions for securities for which no previous expected credit losses were recognized(3)
Change in securities for which a previous expected credit loss was recognized412 
Ending balance$(731)
Gain (Loss) on Equity Securities
The following is a summary of unrealized and realized gains and losses of equity securities recognized in other noninterest income in the consolidated statements of income during the years ended December 31, 2024 and 2023.

For the Years Ended December 31,
(Dollars in thousands)20242023
Equity Securities:
Net gains (losses) recognized during the period$68 $(17)
Less: Net gains recognized during the period on equity securities sold during the period68 — 
Unrealized losses recognized during the reporting period on equity securities still held at the reporting date$— $(17)