Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 1,109,978		$ 1,084,306
Revenues
Revenues	163,267	$ 185,554
United States
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	384,578		377,768
Revenues
Revenues	93,230	107,194
Canada
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	350,556		331,440
Mexico
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	364,047		370,188
Revenues
Revenues	70,037	77,704
Australia
Revenues
Revenues	0	$ 656
Other Foreign Countries [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 10,797		$ 4,910