LEASES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Lease cost
Operating lease cost	$ 1,898	$ 1,679	$ 5,703	$ 5,030
Sublease income	(11)	(32)	(33)	(71)
Total lease cost	$ 1,887	$ 1,647	5,670	4,959
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases			5,442	5,180
Operating right-of-use assets obtained in exchange for lease liabilities			$ 5,716	$ 39,825
Weighted-average remaining lease term-operating leases	7 years 9 months 18 days		7 years 9 months 18 days		7 years 9 months 18 days
Weighted-average discount rate-operating leases	3.00%		3.00%		3.20%
Renewal options			true
Minimum
Lease cost
Renewal term	5 years		5 years
Maximum
Lease cost
Renewal term	10 years		10 years