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Investment Securities (Tables)
 12 Months Ended
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Amortized Cost and Fair Values of Investment Securities Available-for-sale
Amortized cost and fair values of investment securities available-for-sale at December 31, 2024 are summarized as follows:
(Dollars in thousands)Amortized CostUnrealized GainUnrealized LossFair Value
United States government agency securities$45,449 $10 $(5,613)$39,846 
United States sponsored mortgage-backed securities161,032 130 (13,582)147,580 
United States treasury securities106,095 — (2,120)103,975 
Municipal securities114,845 28 (12,733)102,140 
Corporate debt securities9,943 67 (92)9,918 
Other debt securities7,500 — — 7,500 
Total debt securities444,864 235 (34,140)410,959 
Other securities681 — — 681 
Total investment securities available-for-sale$445,545 $235 $(34,140)$411,640 

Amortized cost and fair values of investment securities available-for-sale at December 31, 2023 are summarized as follows:
(Dollars in thousands)Amortized CostUnrealized GainUnrealized LossFair Value
United States government agency securities$44,003 $8 $(5,603)$38,408 
United States sponsored mortgage-backed securities91,939 992 (10,549)82,382 
United States treasury securities106,401 — (6,045)100,356 
Municipal securities118,065 — (11,158)106,907 
Corporate debt securities9,076 — (134)8,942 
Other debt securities7,500 — — 7,500 
Total debt securities376,984 1,000 (33,489)344,495 
Other securities780 — — 780 
Total investment securities available-for-sale$377,764 $1,000 $(33,489)$345,275 

The following table summarizes amortized cost and fair values of debt securities by maturity:
December 31, 2024
Available for sale
(Dollars in thousands)Amortized CostFair Value
Within one year$99,287 $97,511 
After one year, but within five years18,397 17,400 
After five years, but within ten years46,838 42,705 
After ten years280,342 253,343 
Total$444,864 $410,959 
Schedule of Debt Securities, Available-for-Sale, Allowance for Credit Loss
The following table summarizes the activity in the ACL related to available-for-sale debt securities during the twelve months ended December 31, 2024. There was no activity in the ACL related to available-for-sale debt securities during the twelve months ended December 31, 2023.

(Dollars in thousands)Twelve Months Ended December 31, 2024
ACL, beginning of period$— 
Provision for credit losses1,000 
Charge-offs(1,000)
ACL, end of period$— 
Schedule of Investments in an Unrealized Loss Position
The following tables show available-for-sale debt securities in an unrealized loss position for which an ACL has not been recorded as of December 31, 2024 and December 31, 2023, aggregated by investment category and length of time that the individual securities have been in a continuous loss position:

(Dollars in thousands)Less than 12 months12 months or more
Description and number of positionsFair ValueUnrealized LossFair ValueUnrealized Loss
United States government agency securities (28)
$5,956 $(264)$32,854 $(5,349)
United States sponsored mortgage-backed securities (75)
92,929 (2,291)44,444 (11,291)
United States treasury securities (23)
— — 103,975 (2,120)
Municipal securities (201)
17,613 (1,425)83,592 (11,308)
Corporate debt securities (6)
990 (10)2,818 (82)
$117,488 $(3,990)$267,683 $(30,150)

(Dollars in thousands)Less than 12 months12 months or more
Description and number of positionsFair ValueUnrealized LossFair ValueUnrealized Loss
United States government agency securities (25)
$316 $— $34,619 $(5,603)
United States sponsored mortgage-backed securities (47)
— — 50,345 (10,549)
United States treasury securities (23)
— — 100,354 (6,045)
Municipal securities (216)
847 (10)106,060 (11,148)
Corporate securities (7)
2,009 (67)1,933 (67)
$3,172 $(77)$293,311 $(33,412)
Schedule of Realized Gain (Loss) on Investments
The following table summarizes the investment sales and related gains and losses in 2024, 2023 and 2022:
(Dollars in thousands)202420232022
Proceeds from sales of available-for-sale securities$24,327 $54,531 $60,635 
Gains, gross658 — 717 
Losses, gross— (1,536)(67)
Proceeds from sales of equity securities$143 $566 $1,356 
Gains, gross103 25 158 
Losses, gross— (294)(214)
Unrealized holding gains (losses) on equity securities$1,184 $146 $(1,543)