Other Non-Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Other Liabilities [Line Items]
Accrued employee benefit liabilities	$ 51,173		$ 49,170
Accrued environmental liabilities	45,857	[1]	20,346	[1]
Deferred consideration	17,264		16,415
Deferred rent	17,515		13,393
Uncertain tax position liability (see Note 2)	17,720		17,720
Unfavorable storage contracts	39,145	[2]
Other	7,281		10,999
Total other non-current liabilities	$ 195,955		$ 128,043

[1] Amount for 2011 includes environmental liabilities acquired in connection with the BORCO and terminal and pipeline acquisitions. See Note 3 for further information on the respective acquisitions.

[2] At December 31, 2011, the amount is net of approximately $7.6 million of recognized revenue. Revenue to be recognized related to these unfavorable storage contracts is expected to be approximately $11.0 million for each of 2012 and 2013, $11.1 million for each of 2014 and 2015 and $6.0 million for 2016. See Note 3 for a discussion of the unfavorable storage contracts acquired in connection with the BORCO acquisition.