OPERATING LEASES - Supplemental Lease Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
OPERATING LEASES
Weighted-average remaining lease term	7 years 3 months 18 days
Weighted-average discount rate (as a percent)	3.14%
Operating cash flows from operating leases (cash payments)	$ 1,964
Operating cash flows from operating leases (lease liability reduction)	1,555
Operating lease right-of-use assets obtained in exchange for leases entered into during the period	$ 13,610