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Lease Accounting (Maturity of Lease Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | ---
Operating Leased Assets [Line Items] |  |
2020 | $ 39,783 |
2021 | 30,141 |
2022 | 25,858 |
2023 | 23,163 |
2024 | 21,845 |
Thereafter | 152,783 |
Total Lease Payments | 293,573 |
Less: Interest | (120,257) |
Present value of operating lease liabilities | 173,316 | $ 204,364
Transportation Equipment |  |
Operating Leased Assets [Line Items] |  |
2020 | 26,355 |
2021 | 20,282 |
2022 | 18,022 |
2023 | 17,160 |
2024 | 16,355 |
Thereafter | 27,163 |
Total Lease Payments | 125,337 |
Less: Interest | (23,428) |
Present value of operating lease liabilities | 101,909 |
Office Space & Equipment |  |
Operating Leased Assets [Line Items] |  |
2020 | 4,119 |
2021 | 3,163 |
2022 | 2,453 |
2023 | 678 |
2024 | 689 |
Thereafter | 1,723 |
Total Lease Payments | 12,825 |
Less: Interest | (1,619) |
Present value of operating lease liabilities | 11,206 |
Facilities and Equipment |  |
Operating Leased Assets [Line Items] |  |
2020 | 9,309 |
2021 | 6,696 |
2022 | 5,383 |
2023 | 5,325 |
2024 | 4,801 |
Thereafter | 123,897 |
Total Lease Payments | 155,411 |
Less: Interest | (95,210) |
Present value of operating lease liabilities | $ 60,201 |

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