Income Taxes - Difference Between Customary Rate and Effective Tax Rate on Income Before Income Taxes Due (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax at statutory rate	21.00%	21.00%	21.00%
Tax effect of:
Valuation allowance on deferred tax assets	(3.40%)	(13.30%)	1.50%
State income taxes, net of federal benefit	1.10%	(12.20%)	(6.10%)
Other	(0.10%)	(0.50%)	(1.50%)
Effective tax rate	18.60%	(5.00%)	14.90%