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REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
One-time charge associated with FDIC implementation of special assessment	$ 7.4	$ 7.4
Payment for one-time charge associated with FDIC implementation of special assessment		4.7
Commitments to extend credit amount	2,100.0	2,100.0
Valuation allowance	80.8	80.8	$ 119.1
Litigation in Virgin Islands [Member] | Virgin Islands [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Litigation reserve	1.9	1.9
Valuation adjustment	2.8
Standby Letters Of Credit [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Commitments to extend credit amount	78.0	78.0
Credit Card [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Commitments to extend credit amount	$ 800.0	$ 800.0
Basel III [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital Conservation Buffer	2.50%	2.50%

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- Definition

In order to avoid limitations on capital distributions and certain discretionary bonus payments, banking organizations will be requiered to hold a specific amount of excess of their minimum risk-based capital ratios.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Unused amount of commitments to extend credit to customers.

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