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Segment and Geographic Information Segment and Geographic Information 2 (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues $ 480,205 $ 435,412 $ 416,629 $ 447,576 $ 462,042 $ 261,153 $ 181,979 $ 183,203 $ 1,779,822 $ 1,088,377 $ 704,602
Long-Lived Assets 284,386       307,736       284,386 307,736 116,350
United States                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 1,292,492 671,511 336,848
Long-Lived Assets 227,659       257,939       227,659 257,939 65,742
Mexico                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 464,161 397,549 367,754
Long-Lived Assets 53,175       47,243       53,175 47,243 49,259
Other Latin America                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 23,169 19,317 0
Long-Lived Assets $ 3,552       $ 2,554       $ 3,552 $ 2,554 $ 1,349