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Schedule III: Real Estate and Accumulated Depreciation (Parenthetical) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) Property | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |
Number of industrial properties | Property | 427 |  |  |
Tenant improvements, useful life | Lease Term |  |  |
Balance, Beginning of Year | $ 3,830,209 |  | $ 3,673,644 | $ 3,495,745
Acquisition of Real Estate Assets | 247,250 |  | 148,660 | 162,769
Construction Costs and Improvements | 160,491 |  | 289,877 | 190,383
Disposition of Real Estate Assets | (109,070) |  | (258,639) | (148,408)
Impairment of Real Estate | 0 |  | 0 | (2,756)
Write-off of Fully Depreciated and Other Assets | (18,984) |  | (23,333) | (24,089)
Balance, End of Year Including Real Estate Held for Sale | 4,109,896 |  | 3,830,209 | 3,673,644
Real Estate Held for Sale | 22,263 | [1] | 0 | 0
Balance, End of Year Excluding Real Estate Held for Sale | 4,087,633 |  | 3,830,209 | 3,673,644
Balance, Beginning of Year | 804,780 |  | 811,784 | 789,919
Depreciation for Year | 102,533 |  | 98,333 | 94,626
Disposition of Assets | (49,390) |  | (82,919) | (49,144)
Write-off of Fully Depreciated and Other Assets | (18,574) |  | (22,418) | (23,617)
Balance, End of Year Including Real Estate Held for Sale | 839,349 |  | 804,780 | 811,784
Real Estate Held for Sale | (6,956) | [2] | 0 | 0
Balance, End of Year Excluding Real Estate Held for Sale | 832,393 |  | $ 804,780 | $ 811,784
Real Estate Held for Sale - Other Assets | 454 |  |  |
Real Estate Held for Sale - Other Assets Accumulated Depreciation | $ 98 |  |  |
Buildings and Improvements | Minimum |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |
Property, plant and equipment, useful life | 7 years |  |  |
Buildings and Improvements | Maximum |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |
Property, plant and equipment, useful life | 50 years |  |  |
Land Improvements | Minimum |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |
Property, plant and equipment, useful life | 3 years |  |  |
Land Improvements | Maximum |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |
Property, plant and equipment, useful life | 16 years |  |  |
[1] | The Real Estate Held for Sale at December 31, 2020 excludes $454 of other assets.
[2] | The Real Estate Held for Sale at December 31, 2020 excludes $98 of accumulated amortization related to the other assets.

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