FAIR VALUE MEASUREMENTS - Quantitative Information about Level 3 Fair Value (Details) - Fuel derivative contracts - Significant unobservable inputs (Level 3) - Measurement Input, Option Volatility [Member]	Dec. 31, 2024
2025 | Minimum
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.24
2025 | Maximum
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.34
2025 | Weighted Average
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.27
2026 | Minimum
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.22
2026 | Maximum
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.29
2026 | Weighted Average
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.24
2027 | Minimum
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.22
2027 | Maximum
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.24
2027 | Weighted Average
Quantitative Information About Level 3 [Line Items]
Derivative asset, measurement input	0.23