SECURITIES - Summary of Available For Sale and Held to Maturity Securities (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	$ 1,187,982,000	$ 1,226,319,000
Gross Unrealized Gain	82,000	183,000
Gross Unrealized Losses	(195,007,000)	(174,774,000)
Allowance for Credit Losses	0	0
Fair Value	993,057,000	1,051,728,000
U.S. government sponsored agencies
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	142,183,000	146,692,000
Gross Unrealized Gain	0	0
Gross Unrealized Losses	(28,486,000)	(27,213,000)
Allowance for Credit Losses	0	0
Fair Value	113,697,000	119,479,000
Mortgage-backed securities: residential
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	498,259,000	522,275,000
Gross Unrealized Gain	72,000	118,000
Gross Unrealized Losses	(79,101,000)	(74,551,000)
Allowance for Credit Losses	0	0
Fair Value	419,230,000	447,842,000
State and municipal securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	547,540,000	557,352,000
Gross Unrealized Gain	10,000	65,000
Gross Unrealized Losses	(87,420,000)	(73,010,000)
Allowance for Credit Losses	0	0
Fair Value	$ 460,130,000	$ 484,407,000

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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