PLEDGED ASSETS - Assets Pledged By Counterparties (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Pledged Assets [Line Items]
Securities Pledged By Counterparties	$ 8,316	$ 1,418
Cash
Pledged Assets [Line Items]
Securities Pledged By Counterparties	6,892	1,418
US Treasury Securities [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	1,424
Repurchase Agreement [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	7,279	1,418
Repurchase Agreement [Member] | Cash
Pledged Assets [Line Items]
Securities Pledged By Counterparties	5,855	1,418
Repurchase Agreement [Member] | US Treasury Securities [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	1,424
Reverse Repurchase Agreements [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	0
Reverse Repurchase Agreements [Member] | Cash
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0	0
Reverse Repurchase Agreements [Member] | US Treasury Securities [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	0
Derivative Agreements [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	1,037	0
Derivative Agreements [Member] | Cash
Pledged Assets [Line Items]
Securities Pledged By Counterparties	1,037	$ 0
Derivative Agreements [Member] | US Treasury Securities [Member]
Pledged Assets [Line Items]
Securities Pledged By Counterparties	$ 0