Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Tax expense (benefit) on increased interest expense deduction	$ 2,400
Payroll tax funding deferral	37,000
State income tax (benefit) expense	1,100	$ (100)	$ (1,300)
Valuation allowance	12,050	13,784
Unrecognized tax benefits	12,300	6,100	6,800
Interest and penalties	5,100	4,200	4,500
Decrease in unrecognized tax benefits is reasonably possible	3,100
Work Opportunity Tax Credit
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	1,000
Net Portion of Deferred Tax Asset Likely to be Realized
Tax Credit Carryforward [Line Items]
Valuation allowance	4,200
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	36,000	35,600	33,100
Income taxes receivable	5,000	5,000	13,600
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	8,800
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	$ 77,100	$ 77,700	$ 73,400