BORROWINGS - Short-Term Borrowings (Parenthetical) (Details)	12 Months Ended
Dec. 31, 2020
Federal Home Loan Bank of Indianapolis Advance, 1.61%, Due January 7, 2020
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate	1.61%
Federal Home Loan Bank Advances Branch Of Fhlb Bank Due Dates	Jan. 07, 2019
Federal Home Loan Bank of Indianapolis Putable Advance, 0.39%, Due March 4, 2030
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate	0.39%
Federal Home Loan Bank Advances Branch Of Fhlb Bank Due Dates	Jun. 27, 2018

Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant