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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets    
Loss carryforwards $ 419,327 [1] $ 405,674
Tax credits 23,441 [2] 44,790
Accrued expenses 37,609 18,774
Pension plan benefits expense 7,671 7,037
Warranty reserves 8,265 8,535
Depreciation and amortization 64,959 72,505
Equity compensation 9,362 7,061
Inventory valuation 4,883 5,356
Deferred revenue 12,264 13,346
Interest 8,228 11,721
Leases 7,173 9,543
Capitalized research costs 113,465 74,058
Other deferred tax assets, net 9,004 7,986
Total deferred tax assets 725,651 686,386
Valuation allowance (445,170) [1] (427,423)
Total deferred tax assets, net of valuation allowance 280,481 258,963
Deferred tax liabilities    
Depreciation and amortization (23,313) (34,909)
Leases (6,064) (8,274)
Other deferred tax liabilities, net (4,590) (4,631)
Total deferred tax liabilities (33,967) (47,814)
Net deferred tax assets 246,514 $ 211,149
Deferred tax assets, tax credit carryforwards, general business [2] 5,400  
Deferred tax assets, tax credit carryforwards, other [2] 41,900  
U.S. federal    
Deferred tax liabilities    
Loss carryforwards by Jurisdiction [1] 3,600  
LUXEMBOURG    
Deferred tax liabilities    
Loss carryforwards by Jurisdiction [1] $ 1,300,000  
[1] For tax return purposes at December 31, 2023, we had U.S. federal loss carryforwards of $3.6 million, which begin to expire in the year 2024. At December 31, 2023, we have net operating loss carryforwards in Luxembourg of $1.3 billion, the majority of which can be carried forward indefinitely, offset by a full valuation allowance. The remaining portion of the loss carryforwards are composed primarily of losses in various other state and foreign jurisdictions. The majority of these losses can be carried forward indefinitely. At December 31, 2023, there was a valuation allowance of $445.2 million primarily associated with foreign loss carryforwards.
[2] For tax return purposes at December 31, 2023, we had: U.S. general business credits of $5.4 million, which begin to expire in 2043; and state tax credits of $41.9 million, which begin to expire in 2024.