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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS |  |
NET CASH PROVIDED BY OPERATING ACTIVITIES | $ 428,083 | $ 322,962
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchases of marketable securities | (751,545) | (722,347)
Sales of marketable securities | 646,969 | 715,951
Acquisition of property and equipment: |  |
Aircraft and rotable spare parts | (227,832) | (46,833)
Buildings and ground equipment | (13,986) | (10,180)
Proceeds from the sale of property and equipment | 3,823 | 2,958
Deposits on aircraft | (31,078) |
Decrease (increase) in other assets, net | 991 | (15,542)
NET CASH USED IN INVESTING ACTIVITIES | (372,658) | (75,993)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from issuance of long-term debt | 47,099 |
Principal payments on long-term debt | (224,437) | (225,799)
Payment of debt issuance cost | (192) |
Net proceeds from issuance of common stock | 1,293 | 1,446
Employee income tax paid on vested equity awards | (27,242) | (6,930)
Purchase of treasury stock | (30,978) | (22,203)
NET CASH USED IN FINANCING ACTIVITIES | (234,457) | (253,486)
Decrease in cash and cash equivalents | (179,032) | (6,517)
Cash and cash equivalents at beginning of period | 227,362 | 148,277
CASH AND CASH EQUIVALENTS AT END OF PERIOD | 48,330 | 141,760
Non-cash investing and financing activities: |  |
Acquisition of property and equipment | 16,571 | 28,244
Cash paid during the period for: |  |
Interest, net of capitalized amounts | 53,311 | 58,801
Income taxes, net of refunds | $ 9,090 | $ 14,268

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