Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Components of Income Taxes

The provision for income taxes consists of the following (in millions):

	Year Ended December 31,
	2020		2019		2018
Current:
Federal	$	47.7	$	29.9	$	20.6
State	16.5		8.6		10.6
Foreign	4.8		4.6		3.9
	69.0		43.1		35.1
Deferred:
Federal and State	1.8		19.9		11.5
Foreign	(0.4)		(1.0)		(0.4)
	1.4		18.9		11.1
	$	70.4	$	62.0	$	46.2

Income (Loss) before Income Tax Provision

Income from continuing operations before income taxes consists of the following (in millions): 

	Year Ended December 31,
	2020		2019		2018
United States	$	250.7	$	218.7	$	190.7
Foreign	20.0		18.1		13.5
	$	270.7	$	236.8	$	204.2

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax (liabilities) assets are as follows (in millions):

	December 31,
	2020		2019
Intangibles	$	(146.0)	$	(112.7)
Depreciation expense	(14.3)		(13.3)
Operating lease right-of-use assets	(22.1)		(24.8)
Operating lease liabilities	23.3		25.7
Allowance for doubtful accounts	1.4		1.8
Employee-related accruals	14.8		12.0
Stock-based compensation	8.4		9.2
Payroll tax deferral	22.5		—
Net operating loss carryforwards–foreign	0.8		0.8
Other	3.0		3.4
Subtotal	(108.2)		(97.9)
Valuation allowance	(0.5)		(0.8)
	$	(108.7)	$	(98.7)

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation between the amount computed by applying the U.S. federal statutory tax rate of 21 percent in 2020, 2019 and 2018 to income before income taxes, for each respective year and the income tax provision is as follows (in millions):

	Year Ended December 31,
	2020		2019		2018
Income tax provision at the statutory rate	$	56.8	$	49.7	$	42.9
State income taxes, net of federal benefit	13.3		11.5		9.4
Disallowed meals and entertainment expenses	0.8		1.7		1.6
Excess stock-based compensation benefit	(1.3)		(0.9)		(2.2)
Work opportunity tax credit	(2.0)		(2.5)		(3.1)
Impact of tax reform	—		—		(3.0)
Other	2.8		2.5		0.6
	$	70.4	$	62.0	$	46.2

Schedule of Unrecognized Tax Benefits Roll Forward