REVENUES (Freight & Delivery Revenues) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues	[1]	$ 996,511	$ 854,474
Freight & Delivery Revenues [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[2]	(162,605)	(129,690)
Total Revenues Excluding Freight & Delivery [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 833,906	$ 724,784

[1] The geographic markets are defined by states/countries as follows:East market - Arkansas, Delaware, Illinois, Kentucky, Maryland, North Carolina, Pennsylvania, Tennessee, Virginia, and Washington D.C.Gulf Coast market - Alabama, Florida, Georgia, Louisiana, Mexico, Mississippi, Oklahoma, South Carolina, Texas and the BahamasWest market - Arizona, California and New Mexico

[2] Includes freight & delivery to remote distribution sites