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Securities
 6 Months Ended
Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Securities
Note 3 — Securities
The following table is a summary of the amortized cost and estimated fair value, including the allowance for credit losses and gross unrealized gains and losses, of available for sale, held to maturity and securities carried at fair value through income for the dates indicated:
(Dollars in thousands)

June 30, 2024
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value		Allowance for Credit LossesNet Carrying Amount
Available for sale:
State and municipal securities$320,357 $159 $(46,106)$274,410 $— $274,410 
Corporate bonds102,794 338 (8,510)94,622 — 94,622 
U.S. treasury and government agency securities49,110 7 (4,564)44,553 — 44,553 
Commercial mortgage-backed securities103,845 — (10,950)92,895 — 92,895 
Residential mortgage-backed securities534,062 — (66,436)467,626 — 467,626 
Commercial collateralized mortgage obligations49,077 — (4,442)44,635 — 44,635 
Residential collateralized mortgage obligations143,438 — (21,382)122,056 — 122,056 
Asset-backed securities19,259 29 (37)19,251 — 19,251 
Total$1,321,942 $533 $(162,427)$1,160,048 $— $1,160,048 
Held to maturity:
State and municipal securities$11,673 $— $(797)$10,876 $(57)$11,616 
Securities carried at fair value through income:
State and municipal securities(1)
$6,515 $— $— $6,499 $— $6,499 
December 31, 2023
Available for sale:
State and municipal securities$323,356 $210 $(41,440)$282,126 $— $282,126 
Corporate bonds92,244 80 (8,689)83,635 — 83,635 
U.S. treasury and government agency securities84,377 3 (4,740)79,640 — 79,640 
Commercial mortgage-backed securities104,459 — (11,063)93,396 — 93,396 
Residential mortgage-backed securities569,622 — (63,120)506,502 — 506,502 
Commercial collateralized mortgage obligations39,386 — (4,203)35,183 — 35,183 
Residential collateralized mortgage obligations150,710 — (20,566)130,144 — 130,144 
Asset-backed securities43,521 4 (520)43,005 — 43,005 
Total$1,407,675 $297 $(154,341)$1,253,631 $— $1,253,631 
Held to maturity:
State and municipal securities$11,678 $— $(830)$10,848 $(63)$11,615 
Securities carried at fair value through income:
State and municipal securities(1)
$6,815 $— $— $6,808 $— $6,808 
________________________
(1)Securities carried at fair value through income have no unrealized gains or losses at the consolidated balance sheet dates as all changes in value have been recognized in the consolidated statements of income. See Note 5 — Fair Value of Financial Instruments for more information.
Securities with unrealized losses at June 30, 2024, and December 31, 2023, aggregated by investment category and those individual securities that have been in a continuous unrealized loss position for less than 12 months, and for 12 months or more, were as follows.
Less than 12 Months12 Months or MoreTotal
(Dollars in thousands)
June 30, 2024
Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
Available for sale:
State and municipal securities$25,887 $(314)$243,319 $(45,792)$269,206 $(46,106)
Corporate bonds7,758 (523)71,206 (7,987)78,964 (8,510)
U.S. treasury and government agency securities7,148 (7)33,571 (4,557)40,719 (4,564)
Commercial mortgage-backed securities— — 92,895 (10,950)92,895 (10,950)
Residential mortgage-backed securities— — 467,626 (66,436)467,626 (66,436)
Commercial collateralized mortgage obligations
8,577 (113)34,554 (4,329)43,131 (4,442)
Residential collateralized mortgage obligations
— — 122,056 (21,382)122,056 (21,382)
Asset-backed securities2,083 (2)7,428 (35)9,511 (37)
Total$51,453 $(959)$1,072,655 $(161,468)$1,124,108 $(162,427)
Held to maturity:
State and municipal securities$4,857 $(301)$6,019 $(496)$10,876 $(797)
December 31, 2023
Available for sale:
State and municipal securities$27,106 $(266)$246,442 $(41,174)$273,548 $(41,440)
Corporate bonds4,254 (53)74,566 (8,636)78,820 (8,689)
U.S. treasury and government agency securities— — 77,340 (4,740)77,340 (4,740)
Commercial mortgage-backed securities— — 93,396 (11,063)93,396 (11,063)
Residential mortgage-backed securities60 (5)506,442 (63,115)506,502 (63,120)
Commercial collateralized mortgage obligations— — 35,183 (4,203)35,183 (4,203)
Residential collateralized mortgage obligations— — 130,144 (20,566)130,144 (20,566)
Asset-backed securities7,350 (52)31,618 (468)38,968 (520)
Total$38,770 $(376)$1,195,131 $(153,965)$1,233,901 $(154,341)
Held to maturity:
State and municipal securities$4,717 $(447)$6,131 $(383)$10,848 $(830)
At June 30, 2024, the Company had 595 individual securities that were in an unrealized loss position. Management evaluates available for sale debt securities in unrealized loss positions to determine whether the impairment is due to credit-related factors or noncredit-related factors. Consideration is given to (1) the extent to which the fair value is less than the cost, and (2) the financial condition and near-term prospects of the issuer and (3) the intent and ability of the Company to retain its investment in the security for a period of time sufficient to allow for any anticipated recovery in fair value.
Management does not currently intend to sell any securities in an unrealized loss position and believes that it is more likely than not that the Company will not have to sell any such securities before a recovery of cost. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline. Accordingly, at June 30, 2024, management believes that the unrealized losses detailed in the previous table are due to noncredit-related factors, including changes in interest rates and other market conditions.
The following table presents the activity in the allowance for credit losses for held-to-maturity securities.
(Dollars in thousands)Municipal Securities
Allowance for credit losses:2024
Balance at January 1, 2024$63 
Provision recovery for credit loss for held to maturity securities(6)
Balance at June 30, 2024
$57 
Balance at January 1, 2023$899 
Provision expense for credit loss for held to maturity securities36 
Balance at June 30, 2023
$935 
Accrued interest of $5.5 million and $7.7 million was not included in the calculation of the allowance or the amortized cost basis of the securities at June 30, 2024 or 2023, respectively. There were no past due or nonaccrual available for sale or held to maturity securities at June 30, 2024 or December 31, 2023.
Proceeds from sales and calls, and related gross gains and losses of securities available for sale, are shown below.
Six Months Ended June 30,
(Dollars in thousands)20242023
Proceeds from sales/calls$22,285 $39,335 
Gross realized gains— 596 
Gross realized losses(403)(452)
The following table presents the amortized cost and fair value of securities available for sale and held to maturity at June 30, 2024, grouped by contractual maturity. Mortgage-backed securities, collateralized mortgage obligations and asset-backed securities, which do not have contractual payments due at a single maturity date, are shown separately. Actual maturities for mortgage-backed securities, collateralized mortgage obligations, and asset-backed securities will differ from contractual maturities as a result of prepayments made on the underlying loans.
(Dollars in thousands)Held to MaturityAvailable for Sale
June 30, 2024Amortized CostFair ValueAmortized CostFair Value
Due in one year or less$— $— $20,024 $19,945 
Due after one year through five years— — 86,646 79,546 
Due after five years through ten years5,159 4,857 205,842 183,468 
Due after ten years6,514 6,019 159,749 130,626 
Commercial mortgage-backed securities— — 103,845 92,895 
Residential mortgage-backed securities— — 534,062 467,626 
Commercial collateralized mortgage obligations— — 49,077 44,635 
Residential collateralized mortgage obligations— — 143,438 122,056 
Asset-backed securities— — 19,259 19,251 
Total$11,673 $10,876 $1,321,942 $1,160,048 
The following table presents carrying amounts of securities pledged as collateral for deposits and repurchase agreements at the periods presented.
(Dollars in thousands)June 30, 2024December 31, 2023
Carrying value of securities pledged to secure public deposits$391,503 $421,273 
Carrying value of securities pledged to repurchase agreements4,957 5,477