FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Schedule of MPF Program Recourse (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
MPF Program
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
MPF program recourse loss expense (recovery)	$ (20)	$ (135)	$ 25

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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