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Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets- |  |
Accounts receivable and allowance for doubtful accounts | $ 2,530 | $ 1,878
Stock-based compensation | 3,809 | 3,392
Accrued liabilities and expenses | 34,179 | 36,255
Lease liabilities | 32,048 | 27,944
Net operating loss carryforwards | 5,361 | 10,379
Intangible assets | 9,204 | 3,851
Research and experimental expenditures | 106,002 |
Other | 539 | 758
Subtotal | 193,672 | 84,457
Valuation allowances | (379) | (475)
Total deferred tax assets | 193,293 | 83,982
Deferred tax liabilities- |  |
Property and equipment | (18,882) | (15,534)
Lease right-of-use asset | (32,025) | (27,905)
Long-term contracts | (1,870) | (964)
Goodwill | (23,288) | (17,321)
Other | (1,563) | (1,098)
Total deferred tax liabilities | (77,628) | (62,822)
Net deferred tax assets | 115,665 | 21,160
Deferred income tax assets |  |
Deferred tax assets | $ 115,665 | 22,905
Deferred tax liabilities |  | $ 1,745

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