Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items]
Cost of goods sold		$ 254.6	$ 222.5
Advertising expense		$ 2.7	$ 2.3
Accounting Standards Update 2018-02
Summary Of Significant Accounting Policies [Line Items]
Reclassification from AOCI to retained earnings	$ 0.2
Scenario, Forecast | Accounting Standards Update 2016-02 | Minimum
Summary Of Significant Accounting Policies [Line Items]
Right-of-use asset				$ 118.0
Related lease liability				118.0
Scenario, Forecast | Accounting Standards Update 2016-02 | Maximum
Summary Of Significant Accounting Policies [Line Items]
Right-of-use asset				128.0
Related lease liability				$ 128.0