Segment Information - Segment Information Classified Based on Geographic Location (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016		Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 247.6	$ 248.7	$ 224.4	$ 177.8	$ 176.1	[1]	$ 186.7		$ 172.3		$ 172.8		$ 898.5	$ 707.9	$ 768.0
Long-lived assets (excluding deferred tax and intangible assets)	152.7				127.6								152.7	127.6	56.2
U.S.
Segment Reporting Information [Line Items]
Net sales													674.1	510.2	576.8
Long-lived assets (excluding deferred tax and intangible assets)	97.0				78.7								97.0	78.7	53.3
Canada
Segment Reporting Information [Line Items]
Net sales													142.6	111.5	75.9
Long-lived assets (excluding deferred tax and intangible assets)	52.3				46.1								52.3	46.1	0.0
Europe/Other
Segment Reporting Information [Line Items]
Net sales													81.8	86.2	115.3
Europe
Segment Reporting Information [Line Items]
Long-lived assets (excluding deferred tax and intangible assets)	3.1				2.5								3.1	2.5	2.6
Other
Segment Reporting Information [Line Items]
Long-lived assets (excluding deferred tax and intangible assets)	$ 0.3				$ 0.3								$ 0.3	$ 0.3	$ 0.3

[1] The adoption of ASU 2016-09 in the fourth quarter of 2016 did not impact the previously-reported quarterly results for 2016.