Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2014

Summary of Significant Accounting Policies

Schedule of fair value hierarchy of assets measured on nonrecurring basis and gain (losses) recorded

	Assets at Fair Value																Total Losses
	March 31, 2014								March 31, 2013								Three Months Ended March 31,
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		2014			2013
	(in thousands)																(in thousands)
Inventory	$	3,257	$	—	$	—	$	3,257	$	—	$	—	$	—	$	—	$	(295	)	$	—
Equipment held for sale	30,376		—		19,844		10,532		23,996		—		23,966		30		—			—
Total	$	33,633	$	—	$	19,844	$	13,789	$	23,996	$	—	$	23,966	$	30	$	(295	)	$	—