Income Taxes - Schedule of Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax	$ 35,491	$ 15,732	$ 9,419
U.S. state and local income taxes, net of U.S. federal income tax benefits	8,770	4,258	3,144
Unrecognized tax benefit	(853)	0	0
Valuation allowance	517	1,663	1,833
Non-taxable income	(580)	(738)	(637)
Provision to return adjustments	239	(723)	(326)
Change in state and foreign tax rates	238	(135)	267
Foreign tax rate differentials	(469)	(59)	112
Excess tax benefits from share-based awards	(1,008)	(234)	(81)
Other non-deductible expenses	3,669	2,195	2,246
Current and Deferred Income Tax Expense (Benefit) from Continuing Operations	$ 46,014	$ 21,959	$ 15,977
U.S. federal statutory income tax rate, percent	21.00%	21.00%	21.00%
U.S. state and local income taxes, net of U.S. federal income tax benefits, percent	5.20%	5.70%	7.00%
Unrecognized tax benefits, percent	(0.50%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	0.30%	2.20%	4.10%
Other, percent	(0.30%)	(1.00%)	(1.40%)
Adjustment to reflect prior year tax return filings, percent	0.10%	(1.00%)	(0.70%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.10%	(0.20%)	0.60%
Non-U.S. operations, percent	(0.30%)	(0.10%)	0.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent	(0.60%)	(0.30%)	(0.20%)
Business promotion and other non-deductible expenses, percent	2.20%	3.00%	5.00%
Total income tax expense, percent	27.20%	29.30%	35.60%