Income Taxes - Summary of Effective Income Tax Rate On Continuing Operations (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Statutory income tax rate	21.00%	21.00%	21.00%
Effect of statutory depletion	(3.50%)	(2.80%)	(3.40%)
State income taxes, net of federal tax benefit	2.30%	2.60%	2.00%
Federal tax credits	(1.40%)	(1.30%)
Change in tax status of subsidiary			(1.70%)
Other items	(0.50%)	(0.60%)	0.30%
Effective income tax rate	17.90%	18.90%	18.20%