LEASES - Supplemental information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Operating cash flows from operating leases	$ 26,167
ROU Asset obtained in exchange for lease obligation	307,844
Supplemental balance sheet information [Abstract]
Operating leases right-of-use assets	284,400	$ 288,700	$ 0
Operating lease liabilities (current)	37,979		0
Operating lease liabilities (noncurrent)	271,263		$ 0
Total opearting lease Liabilities	$ 309,242	$ 306,200
Weighted Average Remaining Lease Term - Operating	9 years
Weighted Average Discount Rate - Operating	4.90%