Income Taxes - Expense (Benefit) Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Amount
U.S. federal statutory tax rate (in dollars)	$ 21,781	$ 20,016	$ 20,902
State and local income taxes, net of federal income tax effect (in dollars)	4,223	4,495	3,581
Effect of changes in tax laws or rates enacted (in dollars)			458
Energy related tax credits (in dollars)	(450)	(150)	(186)
Benefit of Qualified Opportunity Zone investments (in dollars)			(195)
Changes in valuation allowance (in dollars)	22	(21)	275
Nontaxable or nondeductible items (in dollars)	230	49	147
Other items (in dollars)	203
Total income tax expense	$ 26,009	$ 24,389	$ 24,982
Effective Income Tax Rate Reconciliation, Percent
U.S. federal statutory tax rate (as a percent)	21.00%	21.00%	21.00%
State and local income taxes, net of federal income tax effect (as a percent)	4.10%	4.70%	3.60%
Effect of changes in tax laws or rates enacted (as a percent)			0.50%
Energy related tax credit (as a percent)	(0.40%)	(0.20%)	(0.20%)
Benefit of Qualified Opportunity Zone investments (as a percent)			(0.20%)
Changes in valuation allowance (as a percent)			0.30%
Nontaxable or nondeductible items (as a percent)	0.20%	0.10%	0.10%
Other items (as a percent)	0.20%
Total income tax expense (as a percent)	25.10%	25.60%	25.10%