LEASES - Supplemental Lease Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Weighted-average remaining lease term (years)	5 years 1 month 6 days
Weighted-average discount rate	2.57%
Operating cash flows from operating leases (cash payments)	$ 6,628
Operating cash flows from operating leases (lease liability reduction)	6,610
Operating lease right-of-use assets obtained in exchange for leases entered into during the period, net of business combinations	$ 3,370