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SECURITIES (Debt Securities, Held-to-Maturity, Credit Rating) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 1,023,342	$ 1,059,387
Credit Rating, Not Credit Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	571,124	585,429
U.S. Government and agency obligations
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	305	307
U.S. Government and agency obligations | Credit Rating, Not Credit Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	305	307
Municipal bonds
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	444,104	466,032
Municipal bonds | Credit Rating, Not Credit Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	8,726	9,033
Corporate bonds
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	2,719	2,781
Corporate bonds | Credit Rating, Not Credit Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	2,219	2,281
Mortgage-backed or related securities
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	576,214	590,267
Mortgage-backed or related securities | Credit Rating, Not Credit Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	559,874	573,808
Standard & Poor's, AAA to A Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	452,218	473,958
Standard & Poor's, AAA to A Rating | U.S. Government and agency obligations
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	0	0
Standard & Poor's, AAA to A Rating | Municipal bonds
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	435,378	456,999
Standard & Poor's, AAA to A Rating | Corporate bonds
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	500	500
Standard & Poor's, AAA to A Rating | Mortgage-backed or related securities
Financing Receivable, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 16,340	$ 16,459

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Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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-Section 50
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 320
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-Section 50
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-Topic 326
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