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Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | $ 8,246,337 | $ 8,048,906 |
Capitalized interest | 14,321 | 15,980 | $ 3,732
Capitalization of internal use computer software | 38,329 | 34,650 | $ 29,407
Asset retirement obligations | 34,537 | 30,831 |
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 354,395 | 448,566 |
Buildings and building improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 3,040,253 | 3,029,309 |
Leasehold improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 969,273 | 852,022 |
Racking |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 2,083,199 | 2,040,832 |
Warehouse equipment/vehicles |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 499,787 | 483,218 |
Furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 52,978 | 54,275 |
Computer hardware and software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | 746,993 | 689,261 |
Construction in progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment | $ 499,459 | $ 451,423 |
Minimum | Buildings and building improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 5 years |  |
Minimum | Leasehold improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 5 years |  |
Minimum | Racking |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 1 year |  |
Minimum | Warehouse equipment/vehicles |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 1 year |  |
Minimum | Furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 1 year |  |
Minimum | Computer hardware and software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 2 years |  |
Maximum | Buildings and building improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 40 years |  |
Maximum | Leasehold improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 10 years |  |
Maximum | Racking |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 20 years |  |
Maximum | Warehouse equipment/vehicles |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 10 years |  |
Maximum | Furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 10 years |  |
Maximum | Computer hardware and software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 5 years |  |

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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