OTHER REAL ESTATE OWNED - Summary of Activity in Purchased Other Real Estate Owned (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Real Estate Owned
Other	$ (62)	$ 0
Purchased Other Real Estate Owned
Real Estate Owned
January 1	9,011	12,540
Loans transferred to other real estate owned	2,434	4,294
Acquired in acquisitions	1,888	0
Portion of gains (losses) on sale and write-downs payable to (receivable from) the FDIC under loss-sharing agreements	0	76
Net gains (losses) on sale and write-downs recorded in statement of income	(477)	265
Sales proceeds	(5,140)	(7,229)
Other	(24)	0
Ending balance	$ 7,692	$ 9,946