RESTRICTED STOCK - Summary of restricted stock (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Restricted stock	$ 88,745	$ 37,732
FHLBNY
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Restricted stock	63,627	12,819
FRB capital stock
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Restricted stock	24,953	24,748
Bankers' Bank capital stock (ACBB)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Restricted stock	$ 165	$ 165

Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 210
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=120413173&loc=SL6242262-115580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 210
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=127002003&loc=SL6242269-115581

Name:	us-gaap_RestrictedInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant