Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 1,150,914		$ 1,150,914		$ 1,084,306
Revenues
Revenue	148,795	$ 159,920	482,049	$ 495,014
United States
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	398,614		398,614		377,768
Revenues
Revenue	89,289	99,093	281,762	301,658
Canada
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	392,470		392,470		331,440
Revenues
Revenue	4,051	0	4,051	0
Mexico
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	351,509		351,509		370,188
Revenues
Revenue	55,455	60,677	196,236	191,616
Australia
Revenues
Revenue	0	$ 150	0	$ 1,740
Other Foreign Countries [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 8,321		$ 8,321		$ 4,910