LEASES (Supplemental lease information) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases	$ 7,295	$ 7,596
Operating Lease, Liability, Current	10,411		$ 12,958
Operating Lease, Liability, Noncurrent	13,504		17,953
Total operating lease liabilities	(23,915)		(30,911)
Operating Lease, Right-of-Use Asset	$ 26,386		$ 33,718
Operating Lease, Weighted Average Remaining Lease Term	3 years 3 months		3 years 2 months 27 days
Operating Lease, Weighted Average Discount Rate, Percent	7.19%		7.16%