LEASES - Supplemental Lease Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Weighted-average remaining lease term (years)	6 years 4 months 11 days
Weighted-average discount rate	2.93%
Operating cash flows from operating leases (cash payments)	$ 1,775
Operating cash flows from operating leases (lease liability reduction)	1,571
Operating lease right-of-use assets obtained in exchange for leases entered into during the period	$ 0