Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Effective tax rates on continuing operations	(16.70%)	4.30%	24.70%
Federal statutory income tax rate (as a percent)	21.00%	21.00%	21.00%
Income taxes at the federal statutory rate	$ 81,521	$ 49,530	$ 39,958
Increases (decreases) resulting from-
Net state income taxes	14,278	9,376	7,340
Net unrecognized tax benefits	9,049	(17,922)	640
Nondeductible expenses	5,774	4,045	2,381
R&D tax credits	(43,791)	(51,398)
Stock-based compensation deductions	(928)	(872)	(2,210)
Other	(1,107)	(2,848)	(1,183)
Provision (benefit) for income taxes	$ 64,796	$ (10,089)	$ 46,926

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

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

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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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 exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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