INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Inventory [Line Items]
Crude oil and feedstocks	$ 733,445	$ 608,436
Refined products and blendstocks	778,612	803,319
Other Inventory, Supplies, Gross	34,198	33,762
Total inventory	1,546,255	1,445,517
Excess of replacement value of inventory over LIFO carrying value	105,258	78,407
Titled Inventory [Member]
Inventory [Line Items]
Crude oil and feedstocks	662,276	518,599
Refined products and blendstocks	401,997	425,033
Other Inventory, Supplies, Gross	34,198	33,762
Total inventory	1,098,471	977,394
Inventory Supply and Offtake Arrangements [Member]
Inventory [Line Items]
Crude oil and feedstocks	71,169	89,837
Refined products and blendstocks	376,615	378,286
Other Inventory, Supplies, Gross	0	0
Total inventory	$ 447,784	$ 468,123