DEFERRED CHARGES AND OTHER ASSETS, NET (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred turnaround costs, net	$ 74,844	$ 78,128
Catalyst	64,071	66,377
Deferred financing costs, net	30,382	30,987
Restricted cash	12,116	12,114
Linefill	8,735	8,042
Intangible assets, net	997	1,085
Other	460	616
Deferred charges and other assets	$ 191,605	$ 197,349