LEASES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
LEASES
Options to terminate the leases	true
Operating lease option to terminate Period	30 days
Fixed operating lease expense	$ 4,018
Variable operating lease expense	733
Total operating lease expense	4,751
Supplemental cash flow information related to the operating leases
Cash paid for amounts included in the measurement of operating leases	4,886
ROU assets obtained in exchange for operating lease obligations	20,717
Lease assets and liabilities
Right of use asset	$ 16,420
Right of use asset, Classification	us-gaap:OtherAssetsNoncurrent
Right of use liability, current	$ 3,203
Right of use liability, current, Classification	us-gaap:AccruedLiabilitiesCurrent
Right of use liability, long-term	$ 13,715
Right of use liability, long-term, Classification	us-gaap:OtherLiabilitiesNoncurrent
Total ROU lease liabilities	$ 16,918
Right of use liability, Classification	us-gaap:AccruedLiabilitiesCurrent us-gaap:OtherLiabilitiesNoncurrent
Weighted average remaining lease term	8 years 3 months 7 days
Weighted average discount rate	2.91%
Maturity of the operating lease liabilities
2020	$ 3,635
2021	2,935
2022	2,328
2023	2,065
2024	1,641
Thereafter	6,087
Total undiscounted cash flows	18,691
Less: present value discount	(1,773)
Total lease liabilities	$ 16,918