MORTGAGE BANKING OPERATIONS - Schedule of Loans Sold (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans sold	$ 2,820,189	$ 2,894,720	$ 4,769,166
CRE, multi-family and SBA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans sold	773,378	908,776	843,864
Single family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans sold	$ 2,046,811	$ 1,985,944	$ 3,925,302

The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3461-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585

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Period Type:	duration