SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Non-Cash Investing and Financing Activities:
Property and equipment accrued but unpaid	$ 206,842	$ 166,800
Leasehold improvements paid by landlord	0	350
Notes payable issued to vendor for the purchase of equipment and other assets	35,124	49,780
Unsettled Treasury Shares	0	13,996
Right-of-use assets acquired in exchange for finance lease obligations	29,957	8,162
Deferred financing costs accrued but unpaid	1,236	1,006
noncash or part noncash acquisition, contingent	0	6,733
Noncash or Part Noncash Divestiture, Amount of Consideration Received	0	11,954
Supplemental Data:
Interest Paid, Excluding Capitalized Interest, Operating Activities	1,170,785	1,174,154
Income taxes paid, net	$ 6,457	$ 12,148