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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Loans receivable	$ 7,115,038	$ 7,251,480
Commercial
Financing Receivable, Impaired [Line Items]
Loans receivable	933	14,207
Residential
Financing Receivable, Impaired [Line Items]
Loans receivable	26,045	18,507
Business Assets
Financing Receivable, Impaired [Line Items]
Loans receivable	24,083	16,287
Automobile
Financing Receivable, Impaired [Line Items]
Loans receivable	113	235
Collateral
Financing Receivable, Impaired [Line Items]
Loans receivable	51,174	49,236
Single family residential mortgage
Financing Receivable, Impaired [Line Items]
Loans receivable		1,420,023
Other consumer
Financing Receivable, Impaired [Line Items]
Loans receivable		102,925
Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Loans receivable	1,845,960	2,668,984
Commercial | Commercial and industrial | Commercial
Financing Receivable, Impaired [Line Items]
Loans receivable	0	13,518
Commercial | Commercial and industrial | Residential
Financing Receivable, Impaired [Line Items]
Loans receivable	0	37
Commercial | Commercial and industrial | Business Assets
Financing Receivable, Impaired [Line Items]
Loans receivable	18,392	4,776
Commercial | Commercial and industrial | Automobile
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Commercial | Commercial and industrial | Collateral
Financing Receivable, Impaired [Line Items]
Loans receivable	18,392	18,331
Commercial | Commercial real estate | Commercial
Financing Receivable, Impaired [Line Items]
Loans receivable	910
Commercial | Commercial real estate | Residential
Financing Receivable, Impaired [Line Items]
Loans receivable	0
Commercial | Commercial real estate | Business Assets
Financing Receivable, Impaired [Line Items]
Loans receivable	0
Commercial | Commercial real estate | Automobile
Financing Receivable, Impaired [Line Items]
Loans receivable	0
Commercial | Commercial real estate | Collateral
Financing Receivable, Impaired [Line Items]
Loans receivable	910
Commercial | SBA
Financing Receivable, Impaired [Line Items]
Loans receivable	68,137	205,548
Commercial | SBA | Commercial
Financing Receivable, Impaired [Line Items]
Loans receivable	23	689
Commercial | SBA | Residential
Financing Receivable, Impaired [Line Items]
Loans receivable	4,702	4,458
Commercial | SBA | Business Assets
Financing Receivable, Impaired [Line Items]
Loans receivable	5,691	11,511
Commercial | SBA | Automobile
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Commercial | SBA | Collateral
Financing Receivable, Impaired [Line Items]
Loans receivable	10,416	16,658
Consumer
Financing Receivable, Impaired [Line Items]
Loans receivable	7,115,038
Consumer | Single family residential mortgage
Financing Receivable, Impaired [Line Items]
Loans receivable	1,920,806	1,420,023
Consumer | Single family residential mortgage | Commercial
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Consumer | Single family residential mortgage | Residential
Financing Receivable, Impaired [Line Items]
Loans receivable	21,262	14,012
Consumer | Single family residential mortgage | Business Assets
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Consumer | Single family residential mortgage | Automobile
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Consumer | Single family residential mortgage | Collateral
Financing Receivable, Impaired [Line Items]
Loans receivable	21,262	14,012
Consumer | Other consumer
Financing Receivable, Impaired [Line Items]
Loans receivable	86,988	102,925
Consumer | Other consumer | Commercial
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Consumer | Other consumer | Residential
Financing Receivable, Impaired [Line Items]
Loans receivable	81	0
Consumer | Other consumer | Business Assets
Financing Receivable, Impaired [Line Items]
Loans receivable	0	0
Consumer | Other consumer | Automobile
Financing Receivable, Impaired [Line Items]
Loans receivable	113	235
Consumer | Other consumer | Collateral
Financing Receivable, Impaired [Line Items]
Loans receivable	$ 194	$ 235

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3B
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

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+ References

No definition available.

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