OPERATING LEASES (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
OPERATING LEASES
Right-of-use assets	$ 14,081,000	$ 12,926,000
Operating lease liabilities	16,983,000	$ 15,704,000
Increase in right-of-use asset in exchange for new operating lease liabilities	878,000
Increase to both right-of-use asset and lease liability due to lease modification	$ 1,000,000.0
Weighted-average discount rate	2.70%
Weighted-average remaining lease term	11 years 3 months 18 days
Cash paid for amounts included in the measurement of operating lease liabilities	$ 1,100,000