Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 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
	June 30, 2014								June 30, 2013								Six Months Ended June 30,
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		2014			2013
	(in thousands)																(in thousands)
Inventory	$	13,981	$	—	$	—	$	13,981	$	—	$	—	$	—	$	—	$	—		$	—
Equipment held for sale	27,804		—		25,142		2,662		22,786		—		22,633		153		$	(2,478	)	$	(1,985	)
Total	$	41,785	$	—	$	25,142	$	16,643	$	22,786	$	—	$	22,633	$	153	$	(2,478	)	$	(1,985	)