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Operating Leases (Narrative) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) Engine | Sep. 30, 2024 USD ($) Engine Aircraft | Dec. 31, 2023 USD ($)
Lessee Lease Description [Line Items] |  |  |
Operating lease right-of-use assets, net | $ 812,659 | $ 812,659 | $ 778,216
Lease liabilities, net | 872,369 | $ 872,369 | $ 825,529
Number of aircraft engines | Aircraft |  | 24 |
Lease income | 8,600 | $ 18,200 |
Net book value of lease assets | $ 157,000 | 157,000 |
Other Income [Member] | 2 Aircraft Engines [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Number of engines sold | Engine | 2 |  |
Net book value | $ 6,200 | $ 6,200 |
Gain loss on sale of aircraft engines | 1,100 |  |
Other Income [Member] | 5 Aircraft Engines [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Number of engines sold | Engine |  | 5,000,000 |
Net book value | $ 23,800 | $ 23,800 |
Gain loss on sale of aircraft engines |  | 20,800 |
Other Assets [Member] | 22 Aircraft Engine [Memebr] |  |  |
Lessee Lease Description [Line Items] |  |  |
Number of engines sold | Engine | 22 |  |
Net book value | $ 152,100 | $ 152,100 |
Minimum [Member] | Office Space And Office Equipment [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Operating leases remaining lease term |  | 1 year |
Maximum [Member] | Office Space And Office Equipment [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Operating leases remaining lease term |  | 15 years |

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- Definition Amount, after accumulated depreciation, of long-lived, depreciable flight asset owned and right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 + Details
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