SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER DEBT - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Line of Credit Facility [Line Items]
Securities sold under agreements to repurchase	$ 12,920	$ 10,859
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, current borrowing capacity	25,000
Outstanding balance	$ 0
Revolving Credit Facility | Prime Rate
Line of Credit Facility [Line Items]
Spread on variable rate	0.50%