Revenue and Segment Information - Revenue by Geographical Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net Sales	$ 257,125	$ 213,276	$ 495,212	$ 428,665
United States
Disaggregation of Revenue [Line Items]
Net Sales	183,291	150,277	348,468	311,706
United Kingdom
Disaggregation of Revenue [Line Items]
Net Sales	12,419	12,159	25,862	22,426
France
Disaggregation of Revenue [Line Items]
Net Sales	24,346	21,754	49,273	40,903
Canada
Disaggregation of Revenue [Line Items]
Net Sales	15,418	11,064	29,652	22,178
Australia
Disaggregation of Revenue [Line Items]
Net Sales	3,145	4,692	5,527	7,890
Brazil
Disaggregation of Revenue [Line Items]
Net Sales	4,858	1,650	10,318	2,521
Other
Disaggregation of Revenue [Line Items]
Net Sales	$ 13,648	$ 11,680	$ 26,112	$ 21,041