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ALLOWANCE FOR CREDIT LOSSES FOR LOANS - PEB Acquisition CalCAP loan program (Details) - CalCAP Loan program - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Immediate loss coverage percentage (%)	100.00%		100.00%
Pacific Enterprise Bancorp [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan enrolled under the program	$ 16,200,000		$ 16,200,000		$ 17,700,000
Amount of loss reserve account	5,200,000		5,200,000		6,200,000
Amount of loan originated under the program	1,100,000	$ 461,000	4,500,000	$ 2,500,000
Pacific Enterprise Bancorp [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan enrolled under the program	18,800,000		18,800,000		19,400,000
Amount of loss reserve account	$ 13,600,000		$ 13,600,000		$ 13,700,000

X

- Definition

It represents the amount of borrowed or originated under CalCAP loan program.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

It represents the amount of loss reserve account under CalCAP loan program.

+ References

No definition available.

+ Details

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X

- Definition

It represents the amount of total loan enrolled in CalCAP loan program.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of immediate coverage of loss under CalCAP loan program.

+ References

No definition available.

+ Details

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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

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- Details

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