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Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Expendable parts, supplies and fuel, reserve $ 14,691 $ 12,597
Property, plant and equipment, net 2,947,536 3,069,949
Property, plant, and equipment, owned, accumulated depreciation 1,178,315 1,067,194
Accumulated amortization of other deferred costs 170,226 165,333
Long-term debt and lease obligation, current 118,075 454,769
Debt issuance costs, gross, current 4,245 8,287
Long-term debt and lease obligation 1,681,541 1,611,735
Debt issuance cost, gross, noncurrent $ 12,404 $ 8,842
Treasury stock, common, shares (in shares) 7,181,391 7,172,646
Accrued pilot retention bonus $ 235,887 $ 146,129
Common Stock    
Common stock, par or stated value per share (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares, issued (in shares) 25,559,128 25,580,445
Common stock, shares, outstanding (in shares) 18,377,737 18,407,799
Variable Interest Entity, Primary Beneficiary [Member]    
Property, plant and equipment, net $ 101,712 $ 107,290
Long-term debt and lease obligation, current 13,307 12,787
Long-term debt and lease obligation $ 81,642 $ 94,950