PLEDGED ASSETS - Assets Pledged By Counterparties (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Repurchase Agreement [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	$ 1,418,000	$ 5,589,000
Repurchase Agreement [Member] | Residential Mortgage Backed Securities [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	1,557,000
Repurchase Agreement [Member] | Residential Mortgage Backed Securities [Member] | Pass Through Certificate [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	1,557,000
Repurchase Agreement [Member] | USTreasurySecuritiesMember
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	180,000
Repurchase Agreement [Member] | Cash
Pledged Assets [Line Items]
Securities Pledged By Counterparties	1,418,000	3,852,000
Derivative [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	14,576,000
Derivative [Member] | Residential Mortgage Backed Securities [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	0
Derivative [Member] | Residential Mortgage Backed Securities [Member] | Pass Through Certificate [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	0
Derivative [Member] | USTreasurySecuritiesMember
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	0
Derivative [Member] | Cash
Pledged Assets [Line Items]
Securities Pledged By Counterparties	$ 0	$ 14,576,000