LEASES (Components of Lease Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lease, Cost [Line Items]
Total lease cost	$ 19,070	$ 53,053
Selling, general and administrative expenses
Lease, Cost [Line Items]
Operating lease cost	16,210	45,125
Variable lease cost	2,439	6,535
Short-term lease cost	1,085	2,989
Interest and other income, net
Lease, Cost [Line Items]
Sublease income	$ (664)	$ (1,596)