INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventory [Line Items]
Crude oil and feedstocks	$ 840,851	$ 608,436
Refined products and blendstocks	835,607	803,319
Other Inventory, Supplies, Gross	35,393	33,762
Total inventory	1,711,851	1,445,517
Excess of replacement value of inventory over LIFO carrying value	133,957	78,407
Titled Inventory [Member]
Inventory [Line Items]
Crude oil and feedstocks	739,095	518,599
Refined products and blendstocks	485,126	425,033
Other Inventory, Supplies, Gross	35,393	33,762
Total inventory	1,259,614	977,394
Inventory Supply and Offtake Arrangements [Member]
Inventory [Line Items]
Crude oil and feedstocks	101,756	89,837
Refined products and blendstocks	350,481	378,286
Other Inventory, Supplies, Gross	0	0
Total inventory	$ 452,237	$ 468,123