OTHER NON-CURRENT LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
OTHER NON-CURRENT LIABILITIES
Accrued employee benefit liabilities	$ 43,199	$ 53,551
Accrued environmental remediation liabilities	45,631	48,348
Deferred consideration	15,264	16,264
Deferred rent		21,415
Liability related to investment tax credit	17,720	17,720
Unfavorable storage contracts	17,050	28,151
ARO	2,600	13,424
Other	5,509	5,881
Total other non-current liabilities	$ 146,973	$ 204,754