Acquisitions (Tables)

12 Months Ended

Dec. 31, 2013

Business Combinations [Abstract]

Schedule of Carrying Value of Net Assets Contributed

The table below shows the carrying values of the net Allied Assets contributed at their respective periods (in thousands):

	As of December 31,
	2013		2012
Asset acquired and liabilities assumed:
Property, plant and equipment, net	$	61,205	$	214,710
Asset retirement obligations		-		(23,785	)
Net assets acquired	$	61,205	$	190,925