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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Schedule of MPF Program Recourse (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
MPF Program
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
MPF program recourse loss expense	$ 25	$ 18	$ 127

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- Definition

Other expenses estimating losses (recovery).

+ References

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- Definition

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.

+ References

No definition available.

+ Details

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