Assets Held for Sale (Tables)

12 Months Ended

Dec. 31, 2017

Discontinued Operations And Disposal Groups [Abstract]

Major Classes of Assets as Held for Sale

As of December 31, 2017 and 2016, the carrying amounts of the major classes of assets for the assets held for sale were as follows:

	December 31, 2017		December 31, 2016
	(in thousands)
Current assets	$	33	$	64
Property and equipment, net		8,611		29,383
Other non-current assets		62		97
Total assets held for sale	$	8,706	$	29,544