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LOANS - Modifications that Subsequently Defaulted (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
contract
Dec. 31, 2017
USD ($)
contract
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Modifications that subsequently defaulted, number of contracts (contract) | contract 1 0 3
Modifications that subsequently defaulted, recorded investment | $ $ 195   $ 605
Commercial loans | Commercial real estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Modifications that subsequently defaulted, number of contracts (contract) | contract     1
Modifications that subsequently defaulted, recorded investment | $     $ 113
Commercial and industrial | Commercial real estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Modifications that subsequently defaulted, number of contracts (contract) | contract 1   2
Modifications that subsequently defaulted, recorded investment | $ $ 195   $ 492
Residential | 1-4 family      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Modifications that subsequently defaulted, number of contracts (contract) | contract     0
Modifications that subsequently defaulted, recorded investment | $     $ 0