PROPERTY AND EQUIPMENT. (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Depreciation expense	$ 38,651	$ 35,441	$ 23,632
Asset impairment			$ 1,970
Capital Investment Activities [Member]
Capitalized interest	$ 822	$ 1,307