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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]        
Total revenue $ 94,779 $ 88,530 $ 282,219 $ 263,371
UNITED STATES        
Disaggregation of Revenue [Line Items]        
Total revenue 75,160 70,652 225,327 210,596
CANADA        
Disaggregation of Revenue [Line Items]        
Total revenue $ 19,619 $ 17,878 $ 56,892 $ 52,775