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INVESTMENT SECURITIES (Tables)
 9 Months Ended
Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment Securities Classified as Available for Sale
Investment securities available for sale at September 30, 2024 and December 31, 2023 were as follows:
September 30, 2024
(dollars in thousands)Amortized
cost		Gross
unrealized
gains		Gross
unrealized
losses
Basis Adjustments(2)
Fair
value
Investment securities available for sale
U.S. government sponsored entities and U.S. agency securities
$44,046 $150 $(1,372)— $42,824 
Mortgage-backed securities - agency897,052 5,103 (67,253)(138)834,764 
Mortgage-backed securities - non-agency87,241 1,447 (2,762)— 85,926 
State and municipal securities74,816 592 (4,937)— 70,471 
Corporate securities94,424 306 (6,768)— 87,962 
Other securities(1)
90,181 98 (136)— 90,143 
Total available for sale securities$1,287,760 $7,696 $(83,228)$(138)$1,212,090 
(1)The fair value of other securities includes student loan asset backed securities of $54.0 million and structured financial products of $36.1 million.
(2)Basis adjustments represent the amount of fair value hedging adjustments included in the carrying amount of fixed-rate investment securities designated in fair value hedging arrangements. See Note 5 - Derivative Instruments for additional information regarding these derivative financial instruments.
December 31, 2023
(dollars in thousands)Amortized
cost		Gross
unrealized
gains		Gross
unrealized
losses		Fair
value
Investment securities available for sale
U.S. Treasury securities$1,097 $— $— $1,097 
U.S. government sponsored entities and U.S. agency securities74,161 176 (1,765)72,572 
Mortgage-backed securities - agency650,119 2,325 (77,944)574,500 
Mortgage-backed securities - non-agency87,019 414 (3,904)83,529 
State and municipal securities62,952 258 (5,750)57,460 
Corporate securities109,598 41 (10,467)99,172 
Other securities(1)
27,646 3 (84)27,565 
Total available for sale securities$1,012,592 $3,217 $(99,914)$915,895 
(1)The fair value of other securities includes structured financial products of $27.6 million.
Schedule of Debt Securities, Available-for-sale
The following is a summary of the amortized cost and fair value of the investment securities available for sale, by maturity, at September 30, 2024. Expected maturities may differ from contractual maturities in mortgage-backed securities because the mortgages underlying the securities may be prepaid without penalties. The maturities of all other investment securities available for sale are based on final contractual maturity.
(dollars in thousands)Amortized
cost		Fair
value
Investment securities available for sale
Within one year$1,032 $1,031 
After one year through five years67,779 64,894 
After five years through ten years123,284 114,690 
After ten years111,372 110,785 
Mortgage-backed securities984,293 920,690 
Total available for sale securities$1,287,760 $1,212,090 
    
Proceeds and gross realized gains and losses on sales of investment securities available for sale for the three and nine months ended September 30, 2024 and 2023 are summarized as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(dollars in thousands)2024202320242023
Investment securities available for sale
Proceeds from sales$13,049 $65,911 $58,874 $165,871 
Gross realized gains on sales113 — 420 338 
Gross realized losses on sales(157)(4,961)(616)(6,816)
Schedule of Unrealized Losses and Fair Values for Investment Securities
Unrealized losses and fair values for investment securities available for sale as of September 30, 2024 and December 31, 2023, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized as follows:
September 30, 2024
Less than 12 Months12 Months or moreTotal
(dollars in thousands)Fair
value		Unrealized
loss		Fair
value		Unrealized
loss		Fair
value		Unrealized
loss
Investment securities available for sale
U.S. government sponsored entities and U.S. agency securities$12,266 $43 $8,670 $1,329 $20,936 $1,372 
Mortgage-backed securities - agency136,270 690 406,381 66,563 542,651 67,253 
Mortgage-backed securities - non-agency6,580 66 18,888 2,696 25,468 2,762 
State and municipal securities1,802 26 45,341 4,911 47,143 4,937 
Corporate securities22,100 1,689 55,045 5,079 77,145 6,768 
Other securities46,223 136 — — 46,223 136 
Total available for sale securities$225,241 $2,650 $534,325 $80,578 $759,566 $83,228 
December 31, 2023
Less than 12 Months12 Months or moreTotal
(dollars in thousands)Fair
value		Unrealized
loss		Fair
value		Unrealized
loss		Fair
value		Unrealized
loss
Investment securities available for sale
U.S. government sponsored entities and U.S. agency securities$42,826 $87 $8,323 $1,678 $51,149 $1,765 
Mortgage-backed securities - agency130,106 7,386 348,476 70,558 478,582 77,944 
Mortgage-backed securities - non-agency8,852 353 19,418 3,551 28,270 3,904 
State and municipal securities51,497 5,750 — — 51,497 5,750 
Corporate securities4,688 53 84,662 10,414 89,350 10,467 
Other securities14,763 84 — — 14,763 84 
Total available for sale securities$252,732 $13,713 $460,879 $86,201 $713,611 $99,914