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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans Sold and Purchased (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 814,262	$ 825,537	$ 285,337
Sales	0	0	0
Commercial | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	29,764	120,900
Sales	0	0	0
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	14,750
Sales	0	0	0
Consumer: | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	814,262	795,773	149,687
Sales	$ 0	$ 0	$ 0

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Amount of increase in financing receivable from purchase. 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 11
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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Amount of decrease in financing receivable from sale and reclassification to held-for-sale. 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 11
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447

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-Topic 310
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