Goodwill and Other Intangible Assets, Net - Additional Information (Details)		12 Months Ended
	Nov. 01, 2020 USD ($) reportingUnit	Dec. 31, 2020 USD ($) reportingUnit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | reportingUnit	5	5
Goodwill impairment	$ 0
Intangible assets amortization period		6 years 9 months 18 days
2021		$ 14,000,000.0
2022		12,300,000
2023		11,100,000
2024		9,600,000
2025		$ 8,200,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		15 years
Client Lists and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 13,600,000	$ 14,100,000	$ 17,500,000
Client lists
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		6 years 6 months
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		6 years 9 months 18 days
Other intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		2 years
Other intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period		10 years