LEASES - Lease Cost and Other Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) lease	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Leases
Right-of-use assets	$ 15,776		$ 13,842
Lease liability	$ 16,613
Number of additional operating or financing leases not yet commenced | lease	0
Lease Cost
Capitalized operating lease cost	$ 1,163	$ 1,210
Short-term lease cost	43	43
Total lease cost	1,206	1,253
Cash paid for amounts included in the measurement of lease liabilities and capitalized operating leases:
Operating cash flows	$ 1,160	$ 1,263
Weighted-average remaining lease term - Capitalized operating leases	5 years 7 months 6 days	8 years 7 months 21 days
Weighted-average discount rate - Capitalized operating leases	3.92%	3.92%
Related Parties
Leases
Right-of-use assets	$ 4,353
Lease liability	4,353
Lease Cost
Capitalized operating lease cost	379	$ 379
Short-term lease cost	41	41
Total lease cost	420	420
Cash paid for amounts included in the measurement of lease liabilities and capitalized operating leases:
Operating cash flows	$ 379	$ 379
Weighted-average remaining lease term - Capitalized operating leases	3 years 7 months 24 days	4 years 7 months 2 days
Weighted-average discount rate - Capitalized operating leases	3.92%	3.92%
Others
Lease Cost
Capitalized operating lease cost	$ 784	$ 831
Short-term lease cost	2	2
Total lease cost	786	833
Cash paid for amounts included in the measurement of lease liabilities and capitalized operating leases:
Operating cash flows	$ 781	$ 884
Weighted-average remaining lease term - Capitalized operating leases	6 years 3 months 15 days	10 years 6 months 18 days
Weighted-average discount rate - Capitalized operating leases	3.92%	3.92%