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Income Taxes - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) subsidiary	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Valuation Allowance [Line Items]
U.S. federal statutory corporate tax rate	21.00%	21.00%
Provision for income taxes	$ 83.8	$ 53.3	$ 47.6
Effective tax rate	22.60%	23.40%	23.20%
Number of foreign subsidiaries | subsidiary	2
Deferred tax liabilities, net	$ 13.1
Unrecognized tax benefits that would affect the effective tax rate if recognized	1.7	$ 2.1	$ 1.4
Interest and penalties related to uncertain tax positions	0.3	$ 0.3	$ 0.2
State
Valuation Allowance [Line Items]
NOL carryforwards	564.8
Foreign
Valuation Allowance [Line Items]
NOL carryforwards	$ 85.1

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