Income Taxes - Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal income tax rate	21.00%	21.00%	21.00%
State income taxes, net of Federal tax effect	5.30%	5.80%	6.10%
Non-deductible compensation and meals and entertainment	1.40%	1.60%	1.70%
Tax credits	(1.50%)	(2.10%)	(2.50%)
Tax benefit from restricted stock vesting	(1.50%)	(1.60%)	(0.80%)
Other	0.80%	(1.10%)	(0.40%)
Effective tax rate	25.50%	23.60%	25.10%