Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Federal Statutory Tax Rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory tax rate	21.00%	21.00%	21.00%	35.00%
State income taxes, net of federal income tax benefit	5.30%	3.80%	5.70%
Non-deductible employee stock purchase plan expense	0.30%	0.30%	0.20%
Non-deductible meals and entertainment	0.10%	0.30%	0.30%
Non-deductible officers’ compensation	0.30%	0.20%	0.30%
Tax Reform Act deferred tax revaluation and transition tax impact	0.00%	0.00%	(0.30%)
Stock Vesting under ASU 2016-19	(3.50%)	(1.10%)	(1.40%)
Other, net	(0.50%)	(0.30%)	(0.20%)
Effective tax rate	23.00%	24.20%	25.60%