LEASES - Supplemental information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Operating cash flows from operating leases	$ 38,991
ROU Asset obtained in exchange for lease obligation	304,650
Supplemental balance sheet information [Abstract]
Operating leases right-of-use assets	274,938	$ 288,700	$ 0
Operating lease liabilities (current)	36,543		0
Operating lease liabilities (noncurrent)	263,084		$ 0
Total opearting lease Liabilities	$ 299,627	$ 306,200
Weighted Average Remaining Lease Term - Operating	8 years
Weighted Average Discount Rate - Operating	4.90%