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SECURITIES - Held-to-maturity Debt Securities with Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Less than 12 Months |  |
Fair Value | $ 0 | $ 0
Unrealized Loss | 0 | 0
12 Months or More |  |
Fair Value | 352,138 | 360,570
Unrealized Loss | (29,568) | (28,398)
Fair Value | 352,138 | 360,570
Unrealized Loss | (29,568) | (28,398)
Credit related impairment | 0 | 0
U.S. Government sponsored entities |  |
Less than 12 Months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
12 Months or More |  |
Fair Value | 278,651 | 283,907
Unrealized Loss | (19,373) | (19,038)
Fair Value | 278,651 | 283,907
Unrealized Loss | (19,373) | (19,038)
Residential & multi-family mortgage |  |
Less than 12 Months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
12 Months or More |  |
Fair Value | 73,487 | 76,663
Unrealized Loss | (10,195) | (9,360)
Fair Value | 73,487 | 76,663
Unrealized Loss | $ (10,195) | $ (9,360)

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- Definition Debt Securities, Held-to-maturity, Unrealized Loss Position Less Than 12 Months [Abstract] + References No definition available. + Details
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- Definition Debt Securities, Held-to-maturity, Unrealized Loss Position More Than 12 Months [Abstract] + References No definition available. + Details
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- Definition Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
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