Segment Information (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 344,700	$ 309,042
United States
Segment Reporting Information [Line Items]
Revenue	274,682	252,199
Canada
Segment Reporting Information [Line Items]
Revenue	26,470	28,406
Other Regions [Domain]
Segment Reporting Information [Line Items]
Revenue	$ 43,548	$ 28,437