Income taxes - Schedule of Reconciliation of Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
U.S. statutory tax rate, Amount	$ 60,728	$ 162,490	$ 127,454
State taxes (net of federal income tax benefit), Amount	4,628	17,015	15,867
Tax credits
Purchase of clean energy federal tax credits, Amount	(4,950)	(7,433)	0
Other, Amount	(329)	0	0
Changes in valuation allowances, Amount	1,096	(206)	(4,080)
Non-taxable or non-deductible items, Amount
Non-deductible officers' compensation, Amount	6,423	3,375	2,897
Non-deductible transaction costs, Amount	3,687	0	(4,855)
Non-taxable Merger termination fee, Amount	0	0	(8,191)
Other, Amount	(1,037)	2,448	391
Changes in unrecognized tax benefits, Amount	(352)	(2,491)	(1,050)
Other adjustments, Amount	(569)	(1,254)	1,766
Total	$ 69,325	$ 173,944	$ 130,199
U.S. statutory tax rate, Percent	21.00%	21.00%	21.00%
State taxes (net of federal income tax benefit), Percent	1.60%	2.20%	2.60%
Tax credits
Purchase of clean energy federal tax credits, Percent	(1.70%)	(1.00%)	0.00%
Other, Percent	(0.10%)	0.00%	0.00%
Changes in valuation allowances, Percent	0.40%	0.00%	(0.70%)
Non-taxable or non-deductible items
Non-deductible officers' compensation, Percent	2.20%	0.40%	0.50%
Non-deductible transaction costs, Percent	1.30%	0.00%	(0.80%)
Non-taxable Merger termination fee, Percent	0.00%	0.00%	(1.30%)
Other, Percent	(0.40%)	0.30%	0.10%
Changes in unrecognized tax benefits, Percent	(0.10%)	(0.30%)	(0.20%)
Other adjustments, Percent	(0.20%)	(0.10%)	0.30%
Effective tax rate, Percent	24.00%	22.50%	21.50%