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Summary of Significant Accounting Policies - Aircraft Held for Sale (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025 USD ($) Aircraft	Dec. 31, 2024 USD ($) Aircraft	Dec. 31, 2023 Aircraft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aircraft held for sale	$ 23,449	$ 66,986
Aircraft held for sale	$ 21,853	$ 23,449
Number of aircrafts held for sale | Aircraft	2	3	0
Disposal Group, Held-for-Sale, Not Discontinued Operations | Gulfstream GIV Aircrafts
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aircraft held for sale	$ 11,871	$ 0
Aircraft held for sale sold	(3,650)	(27,327)
Aircraft reclassified to held for sale	605	42,960
Impairment gain (loss) due to fair value adjustments	(197)	(3,762)
Aircraft held for sale	$ 8,629	$ 11,871

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Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of.

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