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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	$ 48,933	$ 36,684
Commercial
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	7,720	8,485
Residential
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	28,323	20,484
Business Assets
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	12,890	7,715
Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	9,545	10,457
Commercial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	4,419	4,654
Commercial | SBA
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	12,777	3,596
Commercial | Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	5,121	5,492
Commercial | Commercial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	2,529	2,644
Commercial | Commercial | SBA
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	70	349
Commercial | Residential | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	0	0
Commercial | Residential | Commercial real estate
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	1,890	2,010
Commercial | Residential | SBA
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	4,241	497
Commercial | Business Assets | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	4,424	4,965
Commercial | Business Assets | Commercial real estate
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	0	0
Commercial | Business Assets | SBA
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	8,466	2,750
Consumer | Single family residential mortgage
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	22,192	17,820
Consumer | Other consumer
Financing Receivable, Impaired [Line Items]
Collateral dependent loans		157
Consumer | Commercial | Single family residential mortgage
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	0	0
Consumer | Commercial | Other consumer
Financing Receivable, Impaired [Line Items]
Collateral dependent loans		0
Consumer | Residential | Single family residential mortgage
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	22,192	17,820
Consumer | Residential | Other consumer
Financing Receivable, Impaired [Line Items]
Collateral dependent loans		157
Consumer | Business Assets | Single family residential mortgage
Financing Receivable, Impaired [Line Items]
Collateral dependent loans	$ 0	0
Consumer | Business Assets | Other consumer
Financing Receivable, Impaired [Line Items]
Collateral dependent loans		$ 0

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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