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Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Statutory tax rate (as a percent)									21.00%	21.00%	21.00%
Computed at the statutory rate -21%									$ 73,061	$ 61,140	$ 64,035
Increase resulting from
State income taxes									(2,655)	12,544	14,090
Tax credits net of related amortization									(467)	57	8
Other									(1,266)	(2,320)	(307)
Actual tax expense	$ 21,980	$ 25,056	$ 3,274	$ 18,363	$ 17,720	$ 18,907	$ 18,098	$ 16,696	$ 68,673	$ 71,421	$ 77,826

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- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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