SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents, and restricted cash to amounts shown in the statements of cash flows (in thousands):

	December 31,
	2024		2023
Cash and cash equivalents	$	1,606,865	$	1,369,947
Restricted cash included in other current assets	14		1,560
Restricted cash included in other noncurrent assets	173		—
Total cash, cash equivalents, and restricted cash	$	1,607,052	$	1,371,507

Schedule of Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash to amounts shown in the statements of cash flows (in thousands):

	December 31,
	2024		2023
Cash and cash equivalents	$	1,606,865	$	1,369,947
Restricted cash included in other current assets	14		1,560
Restricted cash included in other noncurrent assets	173		—
Total cash, cash equivalents, and restricted cash	$	1,607,052	$	1,371,507

Schedule of Property, Plant and Equipment, Net

The Company generally uses the following estimated useful lives for each asset category:

Asset Category	Life (years)
Machinery, tooling and vehicles	3 - 15
Computer equipment and software	3
Furniture and fixtures	5
Finance leases	Shorter of the lease term or the estimated useful lives of the assets
Building and improvements	5 - 40
Leasehold improvements	Shorter of remaining lease term or the estimated useful lives of the assets

Property, plant and equipment, net as of December 31, 2024 and 2023 was as follows (in thousands):

	December 31, 2024		December 31, 2023
Land and land improvements	$	70,967	$	69,718
Building and improvements(1)	1,075,349		576,097
Machinery, tooling and vehicles(2)(3)	1,720,517		1,045,485
Computer equipment and software	105,012		74,336
Leasehold improvements	268,091		221,619
Furniture and fixtures	51,238		45,315
Finance leases	86,852		94,285
Construction in progress	672,534		1,185,413
Total Property, plant and equipment	4,050,560		3,312,268
Less accumulated depreciation and amortization	(787,948)		(501,401)
Property, plant and equipment, net	$	3,262,612	$	2,810,867

(1) As of December 31, 2024 and 2023, $127.5 million and $120.2 million of capital expenditure support received from Ministry of Investment of Saudi Arabia (“MISA”) was primarily recorded as a deduction to the AMP-2 building balance, respectively. See Note 2 “Summary of Significant Accounting Policies” and Note 16 “Related Party Transactions” for more information.

(2) Included $39.5 million and $32.5 million of service loaner vehicles as of December 31, 2024 and 2023, respectively.

(3) Included $34.7 million and $9.1 million of operating lease vehicles sold to rental companies as of December 31, 2024 and 2023, respectively.

Construction in progress consisted of the following (in thousands):

	December 31, 2024		December 31, 2023
Machinery and tooling	$	561,858	$	728,751
Construction of AMP-1 and AMP-2(1)	78,254		430,878
Leasehold improvements and other	32,422		25,784
Total construction in progress	$	672,534	$	1,185,413

(1) As of December 31, 2024 and 2023, $67.3 million and $12.1 million of capital expenditure support received from MISA was recorded primarily as a deduction to the AMP-2 facility construction in progress balance, respectively. See Note 2 “Summary of Significant Accounting Policies” and Note 16 “Related Party Transactions” for more information.