Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Number of reportable segments | segment	3
Advertising costs	$ 54,300,000	$ 52,500,000	$ 49,400,000
Goodwill [Line Items]
Valuation allowance	21,618,000	$ 23,072,000
Provision for workers' compensation claims threshold	$ 500,000
Minimum
Goodwill [Line Items]
Amortized life assigned to identifiable intangible assets (in years)	2 years
Maximum
Goodwill [Line Items]
Amortized life assigned to identifiable intangible assets (in years)	5 years