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Investment Securities
 6 Months Ended
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Investment Securities Investment Securities
Debt securities AFS as of the balance sheet dates consisted of the following:
June 30, 2023Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
 (Dollars in thousands)
U.S. Government-sponsored enterprises$44,586 $— $(5,718)$38,868 
Agency mortgage-backed190,607 53 (33,320)157,340 
State and political subdivisions72,450 310 (7,531)65,229 
Corporate6,350 — (250)6,100 
Total$313,993 $363 $(46,819)$267,537 
December 31, 2022Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
 (Dollars in thousands)
U.S. Government-sponsored enterprises$45,090 $— $(5,845)$39,245 
Agency mortgage-backed198,478 104 (34,150)164,432 
State and political subdivisions47,722 281 (7,537)40,466 
Corporate6,343 — (219)6,124 
Total$297,633 $385 $(47,751)$250,267 
There were no investment securities HTM at June 30, 2023 or December 31, 2022. Investment securities AFS with carrying amounts of $940 thousand and $433 thousand were pledged as collateral for public unit deposits or for other purposes as required or permitted by law at June 30, 2023 and December 31, 2022, respectively.
The amortized cost and estimated fair value of debt securities by contractual scheduled maturity as of June 30, 2023 were as follows:
Amortized
Cost		Fair
Value
Available-for-sale(Dollars in thousands)
Due in one year or less$997 $981 
Due from one to five years24,428 22,052 
Due from five to ten years25,224 22,264 
Due after ten years72,737 64,900 
 123,386 110,197 
Agency mortgage-backed190,607 157,340 
Total debt securities available-for-sale$313,993 $267,537 

Actual maturities may differ for certain debt securities that may be called by the issuer prior to the contractual maturity. Actual maturities usually differ from contractual maturities on agency MBS because the mortgages underlying the securities may be prepaid, usually without any penalties. Therefore, these agency MBS are shown separately and are not included in the contractual maturity categories in the above maturity summary.

Information pertaining to all AFS debt securities with gross unrealized losses, for which an ACL has not been recorded, as of the balance sheet dates, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
June 30, 2023Less Than 12 Months12 Months and overTotal
 Number
of
Securities		Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Fair
Value		Gross
Unrealized
Losses
(Dollars in thousands)
U.S. Government-
  sponsored enterprises		1 $2,934 $(3)34 $35,820 $(5,715)35 $38,754 $(5,718)
Agency mortgage-backed2 5,089 (247)91 146,810 (33,073)93 151,899 (33,320)
State and political
  subdivisions		18 26,312 (815)60 32,490 (6,716)78 58,802 (7,531)
Corporate7 3,229 (122)6 2,871 (128)13 6,100 (250)
Total28 $37,564 $(1,187)191 $217,991 $(45,632)219 $255,555 $(46,819)
December 31, 2022Less Than 12 Months12 Months and overTotal
 Number
of
Securities		Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Fair
Value		Gross
Unrealized
Losses
(Dollars in thousands)
U.S. Government-
  sponsored enterprises		4 $8,000 $(533)31 $31,103 $(5,312)35 $39,103 $(5,845)
Agency mortgage-backed31 24,306 (2,192)62 134,297 (31,958)93 158,603 (34,150)
State and political
  subdivisions		39 15,457 (1,846)27 18,613 (5,691)66 34,070 (7,537)
Corporate10 4,719 (124)3 1,405 (95)13 6,124 (219)
Total84 $52,482 $(4,695)123 $185,418 $(43,056)207 $237,900 $(47,751)

AFS debt securities in unrealized loss positions are evaluated for impairment related to credit losses at least quarterly. For AFS debt securities in an unrealized loss position, management first assesses whether it intends to sell, or it is more likely than not that the Company will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through earnings. For AFS debt securities that do not meet the above criteria, management evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the
security and the issuer, among other factors. If this assessment indicates that a credit loss exists, management compares the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis for the security, a credit loss exists and an ACL is recorded, limited to the amount that the fair value of the security is less than its amortized cost basis. For AFS debt securities, any decline in fair value that has not been recorded through an ACL is recognized in other comprehensive income (loss), net of applicable taxes.

No ACL for AFS debt securities was recorded at adoption of ASU No. 2016-13 or at June 30, 2023. Accrued interest receivable on AFS debt securities totaled $1.4 million and $984 thousand at June 30, 2023 and December 31, 2022, respectively, and is excluded from the estimate of credit losses. Under previously applicable GAAP, no ACL for AFS debt securities was required at December 31, 2022.

There were no sales or calls of securities for the three and six months ended June 30, 2023. The following table presents the proceeds from sales resulting in gross realized gains and gross realized losses from the disposition of AFS securities for the three and six months ended June 30, 2022:
For The Three Months Ended June 30,For The Six Months Ended June 30,
20222022
(Dollars in thousands)
Proceeds from sales$— $6,827 
Proceeds from calls502 502 
Gross gains5 81 
Gross losses— (50)
Net gains on sales of investment securities AFS$5 $31