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Segment Reporting - (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2017
USD ($)
segment
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]                      
Number of segments | segment                 2    
Net revenue $ 114,255 $ 164,112 $ 140,663 $ 88,404 $ 118,650 $ 165,756 $ 137,157 $ 94,432 $ 507,434 $ 515,995 $ 441,222
Long lived assets 898,433       946,276       898,433 946,276 944,875
CANADA                      
Segment Reporting Information [Line Items]                      
Net revenue                 27,700 25,800 $ 5,100
Long lived assets $ 4,400       $ 3,900       $ 4,400 $ 3,900