Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Income Taxes
Current tax benefit for transition tax	$ 1.5
Valuation allowance	8.3	$ 8.1
Change in valuation allowance	(0.2)	(1.0)	$ (0.5)
Excess tax benefit from tax cuts and jobs act	0.0	(1.5)	(1.0)
Deferred tax assets	10.6	14.6		$ 14.6
Income taxes, net	15.3	15.3	$ 26.5
Canada
Income Taxes
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements	5.2
Tax that may be payable on distribution of foreign subsidiary earnings to the United States	0.3
Puerto Rico
Income Taxes
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements	6.4
Tax that may be payable on distribution of foreign subsidiary earnings to the United States	0.6
State
Income Taxes
Operating loss carryforwards, amount	18.2
Accounting Standards Update 2016-09
Income Taxes
Excess tax benefit from tax cuts and jobs act	$ (0.5)	$ (1.0)