LEASES (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
LEASES
Options to terminate the leases	true
Operating lease option to terminate Period	30 days
Fixed operating lease expense	$ 1,016
Variable operating lease expense	39
Total operating lease expense	1,055
Supplemental cash flow information related to the operating leases
Cash paid for amounts included in the measurement of operating leases	1,031
ROU assets obtained in exchange for operating lease obligations	20,466
Lease assets and liabilities
Right of use asset	$ 18,978
Right of use asset, Classification	us-gaap:OtherAssetsNoncurrent
Right of use liability, current	$ 3,530
Right of use liability, current, Classification	us-gaap:AccruedLiabilitiesCurrent
Right of use liability, long-term	$ 15,818
Right of use liability, long-term, Classification	us-gaap:OtherLiabilitiesNoncurrent
Total ROU lease liabilities	$ 19,348
Weighted average remaining lease term	9 years
Weighted average discount rate	3.00%
Maturity of the operating lease liabilities
2020	$ 4,036
2021	3,331
2022	2,703
2023	2,185
2024	1,930
Thereafter	7,316
Total undiscounted cash flows	21,501
Less: present value discount	(2,153)
Total lease liabilities	$ 19,348