LEASES (Components of Lease Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lease, Cost [Line Items]
Total lease cost	$ 17,724	$ 33,983
Selling, general and administrative expenses
Lease, Cost [Line Items]
Operating lease cost	15,196	28,915
Variable lease cost	1,999	4,096
Short-term lease cost	1,006	1,904
Interest and other income, net
Lease, Cost [Line Items]
Sublease income	$ (477)	$ (932)