FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying values and fair value (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Assets
Accrued interest receivable	$ 25,329	$ 35,037	$ 34,115	$ 34,133
Liabilities
Trust preferred debentures	51,205			50,616
Level 1
Assets
Cash and due from banks	114,055			134,212
Federal funds sold	711			849
Loans	0			0
Accrued interest receivable	0			0
Liabilities
Deposits	0			0
Short-term borrowings	75,000			25,000
FHLB and other borrowings	0			0
Subordinated debt	0			0
Trust preferred debentures	0			0
Level 2
Assets
Cash and due from banks	0			0
Federal funds sold	0			0
Loans	0			0
Accrued interest receivable	25,329			34,133
Liabilities
Deposits	6,183,807			6,294,979
Short-term borrowings	12,499			9,865
FHLB and other borrowings	253,520			475,240
Subordinated debt	69,827			90,253
Trust preferred debentures	49,056			51,626
Level 3
Assets
Cash and due from banks	0			0
Federal funds sold	0			0
Loans	4,979,885			6,129,244
Accrued interest receivable	0			0
Liabilities
Deposits	0			0
Short-term borrowings	0			0
FHLB and other borrowings	0			0
Subordinated debt	0			0
Trust preferred debentures	0			0
Carrying amount
Assets
Cash and due from banks	114,055			134,212
Federal funds sold	711			849
Loans	5,167,574			6,103,592
Accrued interest receivable	25,329			34,133
Liabilities
Deposits	6,197,243			6,309,529
Short-term borrowings	87,499			34,865
FHLB and other borrowings	258,000			476,000
Subordinated debt	77,749			93,546
Trust preferred debentures	51,205			50,616
Fair value
Assets
Cash and due from banks	114,055			134,212
Federal funds sold	711			849
Loans	4,979,885			6,129,244
Accrued interest receivable	25,329			34,133
Liabilities
Deposits	6,183,807			6,294,979
Short-term borrowings	87,499			34,865
FHLB and other borrowings	253,520			475,240
Subordinated debt	69,827			90,253
Trust preferred debentures	$ 49,056			$ 51,626

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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- Definition

Fair value portion of federal funds sold and securities borrowed or purchased under agreements to resell.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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-Topic 942
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-Publisher FASB
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- Definition

Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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No definition available.

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- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
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-Topic 210
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- Definition

Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

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