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Fixed Assets | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Fixed Assets | NOTE 9 – Fi xed Assets The following is a summary of fixed assets as of December 31, 2023 and 2022 (in thousands):
|  | December 31, |
|  | 2023 |  |  | 2022 |
Office equipment |  | $ | 356,707 |  |  | $ | 341,641 |
Leasehold improvements |  |  | 141,585 |  |  |  | 129,279 |
Internally developed software |  |  | 85,993 |  |  |  | 67,250 |
Building |  |  | 80,771 |  |  |  | 73,549 |
Aircraft engine operating leases |  |  | 2,370 |  |  |  | 8,612 |
|  |  | 667,426 |  |  |  | 620,331 |
Accumulated depreciation and amortization |  |  | (475,898 | ) |  |  | (420,288 | )
|  | $ | 191,528 |  |  | $ | 200,043 |
For the years ended December 31, 2023, 2022, and 2021, depreciation and amortization totaled $60.5 million, $50.6 million, and $45.6 million, respectively.

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