Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets-
Accounts receivable and allowance for doubtful accounts	$ 3,203	$ 2,530
Stock-based compensation	4,549	3,809
Accrued liabilities and expenses	44,209	34,179
Lease liabilities	51,065	32,048
Net operating loss carryforwards	5,877	5,361
Intangible assets	8,570	9,204
Research and experimental expenditures	195,444	106,002
Other	1,234	539
Subtotal	314,151	193,672
Valuation allowances	(156)	(379)
Total deferred tax assets	313,995	193,293
Deferred tax liabilities-
Property and equipment	(27,049)	(18,882)
Lease right-of-use asset	(51,058)	(32,025)
Long-term contracts	(193,144)	(1,870)
Goodwill	(24,452)	(23,288)
Other	(1,689)	(1,563)
Total deferred tax liabilities	(297,392)	(77,628)
Net deferred tax assets	16,603	115,665
Deferred income tax assets
Deferred tax assets	17,723	$ 115,665
Deferred tax liabilities	$ 1,120