CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Percentage	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues
Revenues (as a percent)	100.00%	100.00%
Cost of revenues
Labor and other operating expenses (as a percent)	42.80%	49.00%
Depreciation, depletion and amortization (as a percent)	6.60%	8.30%
Total cost of revenues (as a percent)	49.40%	57.30%
Gross profit (as a percent)	50.60%	42.70%
Selling, general and administrative expenses (as a percent)	6.90%	6.80%
Operating profit (as a percent)	43.70%	35.90%
Other (income) expense, net
Other (income) expense, net (as a percent)	(3.40%)	(3.60%)
Income before income tax expense (as a percent)	47.10%	39.50%
Income tax expense (as a percent)	9.70%	8.20%
Net income (as a percent)	37.40%	31.30%