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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

U.S. and Foreign Components of Loss Before Income Taxes

The components of the provision for income taxes for the periods indicated are as follows (in thousands):

			Year Ended December 31,
			2022						2021						2020
United States			$	(1,600,323)					$	(1,072,489)					$	(1,804,623)
Foreign			21,684						21,570						7,232
Loss before income taxes			$	(1,578,639)					$	(1,050,919)					$	(1,797,391)

Components of Provision for Income Taxes

The provision for income taxes for the periods indicated are as follows (in thousands):

			Year Ended December 31,
			2022						2021						2020
Current provision
Federal			$	—					$	—					$	—
State			1,256						1,272						1,201
Foreign			4,240						7,228						1,156
Total current			$	5,496					$	8,500					$	2,357
Deferred provision
Federal			481						639						(36,375)
State			1,256						—						(9,534)
Foreign			(1,361)						2,086						(982)
Total deferred			376						2,725						(46,891)
Total provision for (benefit from) income taxes			$	5,872					$	11,225					$	(44,534)

Reconciliation of Statutory Federal Income Tax Rate to the Effective Rate

A reconciliation of the U.S. federal statutory income tax rates to the Company’s effective tax rate is as follows:

			Year Ended December 31,
			2022						2021						2020
Provision at federal statutory rate			21.0		%				21.0		%				21.0		%
State, net of federal benefit			2.1						2.6						3.2
Permanent tax adjustments			(0.4)						(0.2)						(0.4)
Nondeductible expenses			(0.7)						(1.1)						(0.6)
Stock-based compensation			(4.9)						2.5						1.0
Convertible senior notes			—						—						2.7
Change in valuation allowance			(17.1)						(25.2)						(24.0)
Other adjustments			(0.4)						(0.7)						(0.3)
Provision for income taxes			(0.4)		%				(1.1)		%				2.6		%

Schedule of Deferred Tax Assets and Liabilities

The significant components of the Company’s deferred tax assets and liabilities as of the periods indicated were as follows (in thousands):

			December 31,
			2022						2021
Deferred tax assets:
Net operating loss carryforwards			$	2,127,233					$	2,079,896
Insurance reserves and accruals			296,423						276,625
Stock-based compensation			19,132						38,066
Capitalized research expenses			163,370						—
Accrued legal settlement/fees			114,963						89,680
Lease liability			55,579						66,211
Accrued and other liabilities			76,311						64,555
Total deferred tax assets			2,853,011						2,615,033
Less: Valuation allowance			(2,706,982)						(2,408,647)
Deferred tax assets, net of valuation allowance			146,029						206,386
Deferred tax liabilities:
State income taxes			(124,982)						(115,768)
Operating lease right of use assets			(36,379)						(59,838)
Convertible senior notes			—						(31,892)
Total deferred tax liabilities			(161,361)						(207,498)
Net deferred tax assets (liabilities)			$	(15,332)					$	(1,112)

Summary of Rollforward of Valuation Allowance

A reconciliation of the valuation allowance is as follows (in thousands):

			Year Ended December 31,
			2022						2021						2020
Beginning balance			$	2,408,647					$	2,144,548					$	1,751,118
Net changes in deferred tax assets and liabilities			298,335						264,099						393,430
Ending balance			$	2,706,982					$	2,408,647					$	2,144,548

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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-Name Accounting Standards Codification
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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance.

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