LEASES - Leases Balance Sheets Location (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
LEASES
Operating lease right-of-use asset	$ 10,959	$ 12,900
Financial position	us-gaap:OtherAssets
Operating lease liability	$ 14,284	$ 16,600
Financial position	us-gaap:OtherLiabilities
Weighted-Average Remaining Lease Term - Operating leases	5 years 29 days
Weighted-Average Discount Rate - Operating leases	3.70%