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SECURITIES - Summary of Available For Sale and Held to Maturity Securities (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	$ 1,171,163,000	$ 1,226,319,000
Gross Unrealized Gain	213,000	183,000
Gross Unrealized Losses	(154,727,000)	(174,774,000)
Allowance for Credit Losses	0	0
Fair Value	1,016,649,000	1,051,728,000
U.S. government sponsored agencies
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	139,998,000	146,692,000
Gross Unrealized Gain	0	0
Gross Unrealized Losses	(23,330,000)	(27,213,000)
Allowance for Credit Losses	0	0
Fair Value	116,668,000	119,479,000
Mortgage-backed securities: residential
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	485,128,000	522,275,000
Gross Unrealized Gain	158,000	118,000
Gross Unrealized Losses	(62,219,000)	(74,551,000)
Allowance for Credit Losses	0	0
Fair Value	423,067,000	447,842,000
State and municipal securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	546,037,000	557,352,000
Gross Unrealized Gain	55,000	65,000
Gross Unrealized Losses	(69,178,000)	(73,010,000)
Allowance for Credit Losses	0	0
Fair Value	$ 476,914,000	$ 484,407,000

X

- Definition

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).

+ References

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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- Definition

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
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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- Definition

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).

+ References

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-Topic 326
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-Section 45
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-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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- Definition

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
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