BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - OPERATIONS (Details)	6 Months Ended
	Jun. 30, 2020 segment item
Basis of Presentation
Number of reportable segments | segment	5
Number of banking centers	42
Number of loan production offices	2
Kentucky
Basis of Presentation
Number of banking centers	28
Metropolitan Louisville
Basis of Presentation
Number of banking centers	18
Central Kentucky
Basis of Presentation
Number of banking centers	7
Georgetown
Basis of Presentation
Number of banking centers	1
Lexington
Basis of Presentation
Number of banking centers	5
Shelbyville
Basis of Presentation
Number of banking centers	1
Northern Kentucky
Basis of Presentation
Number of banking centers	3
Covington
Basis of Presentation
Number of banking centers	1
Crestview Hills
Basis of Presentation
Number of banking centers	1
Florence
Basis of Presentation
Number of banking centers	1
Southern Indiana
Basis of Presentation
Number of banking centers	3
Floyds Knobs
Basis of Presentation
Number of banking centers	1
Jeffersonville
Basis of Presentation
Number of banking centers	1
New Albany
Basis of Presentation
Number of banking centers	1
Metropolitan Tampa, Florida
Basis of Presentation
Number of banking centers	8
Number of loan production offices	1
Metropolitan Cincinnati, Ohio
Basis of Presentation
Number of banking centers	2
Metropolitan Nashville, Tennessee
Basis of Presentation
Number of banking centers	3
Number of loan production offices	1
Core Banking
Basis of Presentation
Number of reportable segments | segment	3
Core Banking | Minimum
Basis of Presentation
Period of loan expected to remain in warehouse line	15 days
Core Banking | Maximum
Basis of Presentation
Period of loan expected to remain in warehouse line	30 days
Republic Processing Group
Basis of Presentation
Number of reportable segments | segment	2