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SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Securities
The amortized cost, gross unrealized gains and losses, and estimated fair value of securities at December 31, 2023 and December 31, 2022 are summarized as follows (in thousands):
 December 31, 2023
 Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesFair Value
Available-for-Sale:
U.S. Government and agency obligations$34,929 $— $(740)$— $34,189 
Municipal bonds161,264 832 (29,191)— 132,905 
Corporate bonds131,291 — (12,168)— 119,123 
Mortgage-backed or related securities2,179,947 942 (314,175)— 1,866,714 
Asset-backed securities222,549 300 (1,997)— 220,852 
 $2,729,980 $2,074 $(358,271)$— $2,373,783 

 December 31, 2023
 Amortized CostGross Unrealized GainsGross Unrealized LossesFair ValueAllowance for Credit Losses
Held-to-Maturity:
U.S. Government and agency obligations$307 $— $(5)$302 $— 
Municipal bonds466,032 687 (53,563)412,999 (157)
Corporate bonds2,781 — (20)2,586 (175)
Mortgage-backed or related securities590,267 — (98,640)491,627 — 
$1,059,387 $687 $(152,228)$907,514 $(332)

December 31, 2022
Amortized CostFair Value
Trading:
Corporate bonds$27,203 $28,694 
$27,203 $28,694 

December 31, 2022
Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesFair Value
Available-for-Sale:
U.S. Government and agency obligations$56,344 $8 $(1,244)$— $55,108 
Municipal bonds301,449 530 (40,770)— 261,209 
Corporate bonds133,334 — (11,481)— 121,853 
Mortgage-backed or related securities2,505,172 885 (366,721)— 2,139,336 
Asset-backed securities222,478 40 (10,993)— 211,525 
 $3,218,777 $1,463 $(431,209)$— $2,789,031 
December 31, 2022
Amortized CostGross Unrealized GainsGross Unrealized LossesFair ValueAllowance for Credit Losses
Held-to-Maturity:
U.S. Government and agency obligations$312 $— $(7)$305 $— 
Municipal bonds503,117 109 (70,907)432,319 (183)
Corporate bonds2,961 — (16)2,945 (196)
Mortgage-backed or related securities611,577 — (104,966)506,611 — 
$1,117,967 $109 $(175,896)$942,180 $(379)
Schedule of Securities with Continuous Loss Position , the gross unrealized losses and the fair value for securities available-for-sale aggregated by the length of time that individual securities have been in a continuous unrealized loss position were as follows (in thousands):
 December 31, 2023
 Less Than 12 Months12 Months or MoreTotal
 Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Available-for-Sale:
U.S. Government and agency obligations$— $— $34,189 $(740)$34,189 $(740)
Municipal bonds6,049 (7)103,511 (29,184)109,560 (29,191)
Corporate bonds15,720 (46)106,852 (12,122)122,572 (12,168)
Mortgage-backed or related securities71,150 (212)1,712,125 (313,963)1,783,275 (314,175)
Asset-backed securities115,162 (1,212)85,840 (785)201,002 (1,997)
 $208,081 $(1,477)$2,042,517 $(356,794)$2,250,598 $(358,271)

 December 31, 2022
 Less Than 12 Months12 Months or MoreTotal
 Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Available-for-Sale:
U.S. Government and agency obligations$33,407 $(882)$16,732 $(362)$50,139 $(1,244)
Municipal bonds188,920 (25,592)33,907 (15,178)222,827 (40,770)
Corporate bonds108,187 (9,547)13,066 (1,934)121,253 (11,481)
Mortgage-backed or related securities930,566 (90,537)1,159,110 (276,184)2,089,676 (366,721)
Asset-backed securities201,437 (10,993)— — 201,437 (10,993)
 $1,462,517 $(137,551)$1,222,815 $(293,658)$2,685,332 $(431,209)
Schedule of Realized Gain (Loss)
The following table presents gross gains and losses on sales and partial calls of securities available-for-sale (in thousands):
 For the Year Ended December 31,
 202320222021
Available-for-Sale:
Gross Gains$383 $522 $993 
Gross Losses(19,625)(3,770)(495)
Balance, end of the period$(19,242)$(3,248)$498 
Schedule of Securities by Contractual Maturity Date
The following table presents the amortized cost and estimated fair value of securities at December 31, 2023, by contractual maturity and does not reflect any required periodic payments (in thousands). Expected maturities will differ from contractual maturities because some securities may be called or prepaid with or without call or prepayment penalties.
 December 31, 2023
Available-for-SaleHeld-to-Maturity
 Amortized CostFair ValueAmortized CostFair Value
Maturing within one year$— $— $6,685 $6,446 
Maturing after one year through five years162,723 152,661 18,546 18,245 
Maturing after five years through 10 years370,064 327,355 22,220 21,240 
Maturing after 10 years2,197,193 1,893,767 1,011,936 861,583 
$2,729,980 $2,373,783 $1,059,387 $907,514 
Schedule of Pledged Securities
The following table presents, as of December 31, 2023, investment securities which were pledged to secure borrowings, public deposits or other obligations as permitted or required by law (in thousands):
December 31, 2023
 Carrying ValueAmortized CostFair Value
Purpose or beneficiary:  
State and local governments public deposits$250,855 $263,496 $230,490 
Federal Reserve115,007 115,007 98,259 
Interest rate swap counterparties971 971 813 
Repurchase transaction accounts266,648 266,648 220,926 
Other2,335 2,335 2,156 
Total pledged securities$635,816 $648,457 $552,644 
Debt Securities, Held-to-maturity, Credit Quality Indicator The following tables summarize the amortized cost of held-to-maturity debt securities by credit rating at December 31, 2023 and December 31, 2022 (in thousands):
December 31, 2023
U.S. Government and agency obligationsMunicipal bondsCorporate bondsMortgage-backed or related securitiesTotal
AAA/AA/A$— $456,999 $500 $16,459 $473,958 
Not Rated307 9,033 2,281 573,808 585,429 
$307 $466,032 $2,781 $590,267 $1,059,387 

December 31, 2022
U.S. Government and agency obligationsMunicipal bondsCorporate bondsMortgage-backed or related securitiesTotal
AAA/AA/A$— $492,105 $500 $16,681 $509,286 
Not Rated312 11,012 2,461 594,896 608,681 
$312 $503,117 $2,961 $611,577 $1,117,967 
Debt Securities, Held-to-maturity, Allowance for Credit Loss
The following tables present the activity in the allowance for credit losses for held-to-maturity debt securities by major type for the year ended December 31, 2023 and December 31, 2022 (in thousands):
For the Year Ended December 31, 2023
U.S. Government and agency obligationsMunicipal bondsCorporate bondsMortgage-backed or related securitiesTotal
Allowance for credit losses – securities
Beginning balance$— $183 $196 $— $379 
Recapture of provision for credit losses— (26)(45)— (71)
Recoveries— — 24 — 24 
Ending balance$— $157 $175 $— $332 

For the Year Ended December 31, 2022
U.S. Government and agency obligationsMunicipal bondsCorporate bondsMortgage-backed or related securitiesTotal
Allowance for credit losses – securities
Beginning balance$— $203 $230 $— $433 
Recapture of provision for credit losses— (20)(63)— (83)
Recoveries— — 29 — 29 
Ending balance$— $183 $196 $— $379 

For the Year Ended December 31, 2021
U.S. Government and agency obligationsMunicipal bondsCorporate bondsMortgage-backed or related securitiesTotal
Allowance for credit losses – securities
Beginning balance$— $59 $35 $— $94 
Provision for credit losses— 144 445 — 589 
Securities charged-off— — (250)— (250)
Ending balance$— $203 $230 $— $433