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SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of amortized cost and fair values of securities available-for-sale, with gross unrealized gains and losses
The amortized cost and fair values of debt securities, with gross unrealized gains and losses and allowance for credit losses, are as follows:
December 31, 2023
(dollars in thousands)Amortized Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Credit LossesFair Value
Available-for-sale:
U.S. Treasury$159,715$—$(11,093)$—$148,622
U.S. government agency55,359—(3,262)—52,097
Municipal229,03026(23,499)—205,557
Mortgage-backed:
Agency residential188,64161(14,718)—173,984
Agency commercial141,2143(14,205)—127,012
Corporate57,6659(5,485)—52,189
Total available-for-sale$831,624$99$(72,262)$—$759,461
December 31, 2023
(dollars in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair ValueAllowance for Credit Losses
Held-to-maturity:
U.S. government agency$88,448$—$(8,292)$80,156$—
Municipal38,442394(163)38,673—
Mortgage-backed:
Agency residential95,828—(5,569)90,259—
Agency commercial298,721—(41,313)257,408—
Total held-to-maturity$521,439$394$(55,337)$466,496$—
December 31, 2022
(dollars in thousands)
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
Available-for-sale:
U.S. Treasury$169,860 $— $(15,345)$154,515 
U.S. government agency59,291 — (4,134)55,157 
Municipal275,972 46 (32,189)243,829 
Mortgage-backed:
Agency residential213,676 5 (18,240)195,441 
Agency commercial150,060 — (17,172)132,888 
Corporate65,597 55 (3,958)61,694 
Total available-for-sale$934,456 $106 $(91,038)$843,524 
December 31, 2022
(dollars in thousands)
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
Held-to-maturity:
U.S. government agency$88,424 $— $(9,728)$78,696 
Municipal42,167 195 (314)42,048 
Mortgage-backed:
Agency residential102,728 — (6,470)96,258 
Agency commercial308,281 — (46,482)261,799 
Total held-to-maturity$541,600 $195 $(62,994)$478,801 
The following table presents gross unrealized losses and fair value of debt securities available-for-sale that do not have an associated allowance for credit losses as of December 31, 2023, aggregated by category and length of time that individual debt securities have been in a continuous unrealized loss position:
December 31, 2023
Investments in a Continuous Unrealized Loss Position
Less than 12 Months12 Months or MoreTotal
(dollars in thousands)
Unrealized
Loss
Fair Value
Unrealized
Loss
Fair Value
Unrealized
Loss
Fair Value
Available-for-sale:
U.S. Treasury$— $— $(11,093)$148,622 $(11,093)$148,622 
U.S. government agency(2)168 (3,260)51,910 (3,262)52,078 
Municipal(26)4,749 (23,473)194,287 (23,499)199,036 
Mortgage-backed:
Agency residential(163)9,354 (14,555)156,785 (14,718)166,139 
Agency commercial(26)3,016 (14,179)123,404 (14,205)126,420 
Corporate(414)4,361 (5,071)45,826 (5,485)50,187 
Total available-for-sale$(631)$21,648 $(71,631)$720,834 $(72,262)$742,482 
The following table presents gross unrealized losses and fair value of debt securities, aggregated by category and length of time that individual debt securities have been in a continuous unrealized loss position, as of December 31, 2022:
December 31, 2022
Investments in a Continuous Unrealized Loss Position
Less than 12 Months12 Months or MoreTotal
(dollars in thousands)
Unrealized
Loss
Fair Value
Unrealized
Loss
Fair Value
Unrealized
Loss
Fair Value
Available-for-sale:
U.S. Treasury$(8,401)$92,445 $(6,944)$62,070 $(15,345)$154,515 
U.S. government agency(2,980)47,370 (1,154)7,787 (4,134)55,157 
Municipal(10,906)149,261 (21,283)87,794 (32,189)237,055 
Mortgage-backed:
Agency residential(8,332)127,288 (9,908)65,692 (18,240)192,980 
Agency commercial(4,764)62,672 (12,408)70,216 (17,172)132,888 
Corporate(2,594)52,190 (1,364)5,600 (3,958)57,790 
Total available-for-sale(37,977)531,226 (53,061)299,159 (91,038)830,385 
Held-to-maturity:
U.S. government agency(1,754)15,751 (7,974)62,945 (9,728)78,696 
Municipal(314)23,433 — — (314)23,433 
Mortgage-backed:
Agency residential(4,039)78,452 (2,431)17,806 (6,470)96,258 
Agency commercial(16,716)103,298 (29,766)158,501 (46,482)261,799 
Total held-to-maturity(22,823)220,934 (40,171)239,252 (62,994)460,186 
Total debt securities$(60,800)$752,160 $(93,232)$538,411 $(154,032)$1,290,571 
Schedule of certain debt securities from the available-for-sale category to the held-to-maturity category The following is a summary of the amortized cost and fair value of securities transferred to the held-to-maturity category:
March 31, 2022
(dollars in thousands)Amortized
Cost		Fair Value
U.S. government agency$78,841$71,048
Mortgage-backed:
Agency residential8,1757,651
Agency commercial27,83425,432
Total$114,850$104,131
Schedule of amortized cost and fair value of securities by contractual maturity
The amortized cost and fair value of debt securities by contractual maturity, as of December 31, 2023, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
Available-for-SaleHeld-to-Maturity
(dollars in thousands)
Amortized
Cost
Fair Value
Amortized
Cost
Fair Value
Due in 1 year or less$46,534 $45,564 $2,138 $2,141 
Due after 1 year through 5 years208,581 196,431 35,590 34,269 
Due after 5 years through 10 years199,695 174,573 83,488 77,094 
Due after 10 years46,959 41,897 5,674 5,325 
Mortgage-backed:
Agency residential188,641 173,984 95,828 90,259 
Agency commercial141,214 127,012 298,721 257,408 
Total$831,624 $759,461 $521,439 $466,496 
Schedule of sales of debt securities
Sales of debt securities were as follows during the year ended December 31:
Year Ended December 31,
(dollars in thousands)202320222021
Proceeds from sales$185,280$—$—
Gross realized gains———
Gross realized losses(1,820)——
Schedule of equity securities with initial cost and carrying values of equity securities, with cumulative net unrealized gains and losses
The initial cost and carrying values of equity securities, with cumulative net unrealized gains and losses are as follows:
December 31, 2023
(dollars in thousands)Readily
Determinable
Fair Value		No Readily
Determinable
Fair Value
Initial cost$3,143$2,840
Cumulative net unrealized gains (losses)217(335)
Carrying value$3,360$2,505
December 31, 2022
(dollars in thousands)Readily
Determinable
Fair Value		No Readily
Determinable
Fair Value
Initial cost$3,142$2,142
Cumulative net unrealized gains (losses)(113)(165)
Carrying value$3,029$1,977
Schedule of unrealized gains (losses) on equity securities Unrealized gains (losses) on equity securities were as follows during the years ended December 31, 2023, 2022, and 2021:
Year Ended December 31,
(dollars in thousands)202320222021
Readily determinable fair value$330$(414)$107 
No readily determinable fair value(170)——
Unrealized gains (losses) on equity securities$160 $(414)$107