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v3.19.3

Property and Equipment and Identifiable Intangible Assets - Property and Equipment (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) item hp | Sep. 30, 2019 USD ($) item hp | Sep. 30, 2018 USD ($) item hp | Dec. 31, 2018 USD ($)
Property and Equipment |  |  |  |  |
Property and equipment, gross | $ 3,459,936 |  | $ 3,459,936 |  | $ 3,343,024
Less accumulated depreciation and amortization | (962,480) |  | (962,480) |  | (821,536)
Property and equipment, net | 2,497,456 |  | 2,497,456 |  | 2,521,488
Depreciation expense | 50,200 | $ 51,500 | 151,200 | $ 136,000 |
(Loss) gain on disposition of assets | 2,000 | $ (1,300) | $ 400 | $ (12,300) |
Number of compressor units that are to be retired or sold or reutilized | item |  | 18 | 14 | 18 |
Number of horsepower that are to be retired or sold or reutilized | hp |  | 5,800 | 4,700 | 5,800 |
Impairment of long-lived assets |  | $ 2,292 | $ 3,234 | $ 2,292 |
Accounts payable and accrued liabilities |  |  |  |  |
Property and Equipment |  |  |  |  |
Purchases of property and equipment |  |  | 11,700 |  | 7,900
Compression and treating equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | 3,355,314 |  | 3,355,314 |  | 3,239,831
Impairment of long-lived assets | 0 |  | $ 3,200 |  |
Newly acquired compression equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 25 years |  |
Furniture and fixtures |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | 1,325 |  | $ 1,325 |  | 1,129
Automobiles and vehicles |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | 31,869 |  | 31,869 |  | 32,490
Computer equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | 57,133 |  | 57,133 |  | 54,806
Buildings |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | 8,639 |  | $ 8,639 |  | 9,314
Estimated useful lives |  |  | 5 years |  |
Land |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | 77 |  | $ 77 |  | 77
Leasehold improvements |  |  |  |  |
Property and Equipment |  |  |  |  |
Property and equipment, gross | $ 5,579 |  | $ 5,579 |  | $ 5,377
Estimated useful lives |  |  | 5 years |  |
Minimum | Used compression equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 5 years |  |
Minimum | Furniture and fixtures | Estimated useful lives |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 3 years |  |
Minimum | Vehicles and computer equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 1 year |  |
Maximum | Used compression equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 25 years |  |
Maximum | Furniture and fixtures | Estimated useful lives |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 10 years |  |
Maximum | Vehicles and computer equipment |  |  |  |  |
Property and Equipment |  |  |  |  |
Estimated useful lives |  |  | 10 years |  |

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