Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2016

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, 2016								March 31, 2015								Three Months Ended March 31,
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		2016		2015
	(in thousands)																(in thousands)
Equipment held for sale	$	3,307	$	—	$	3,307	$	—	$	—	$	—	$	—	$	—	$	(2,036)	$	(24)