Mineral Leaseholds, Net (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Summary of Mineral Leaseholds

Mineral leaseholds, net of accumulated depletion, consisted of the following:

	March 31, 2013			December 31, 2012
Mineral leaseholds	$	1,462		$	1,502
Less accumulated depletion		(85	)		(63	)
Net	$	1,377		$	1,439

	Successor
	December 31, 2012			December 31, 2011
Mineral leaseholds	$	1,502		$	42
Less accumulated depletion		(63	)		(4	)
Net	$	1,439		$	38