Other non-current liabilities consist of the following at the dates indicated (in thousands):


	December 31,
	2011		2010
Accrued employee benefit liabilities	$	51,173	$	49,170
Accrued environmental liabilities (1)		45,857		20,346
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 (2)		39,145		—
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.