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LOANS AND ALLOWANCE FOR LOAN LOSSES - Loans Sold and Purchased (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 0	$ 59,481	$ 0
Sales	0	0	0
Consumer | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	59,481	0
Sales	0	0	0
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0
Sales	$ 0	$ 0	$ 0

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+ References

No definition available.

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- Definition

Amount of increase from purchase of financing receivable.

+ 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 http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

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Amount of decrease from sale and reclassification to held-for-sale of financing receivable.

+ 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 http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

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