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Schedule III: Real Estate and Accumulated Depreciation (Parenthetical) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) Property | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Real Estate and Accumulated Depreciation [Line Items] |  |  |
Number of industrial properties | Property | 440 |  |
Tenant improvements, useful life | Lease Term |  |
Balance, Beginning of Year | $ 3,673,644 | $ 3,495,745 | $ 3,388,611
Acquisition of Real Estate Assets | 148,660 | 162,769 | 168,517
Construction Costs and Improvements | 289,877 | 190,383 | 137,361
Disposition of Real Estate Assets | (258,639) | (148,408) | (170,928)
Impairment of Real Estate | 0 | (2,756) | 0
Write-off of Fully Depreciated and Other Assets | (23,333) | (24,089) | (27,816)
Balance, End of Year | 3,830,209 | 3,673,644 | 3,495,745
Balance, Beginning of Year | 811,784 | 789,919 | 797,919
Depreciation for Year | 98,333 | 94,626 | 94,078
Disposition of Assets | (82,919) | (49,144) | (78,844)
Write-off of Fully Depreciated and Other Assets | (22,418) | (23,617) | (23,234)
Balance, End of Year | 804,780 | 811,784 | 789,919
Balance, End of Year | $ 804,780 | $ 811,784 | $ 789,919
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 | 20 years |  |

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
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- Definition Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column F)) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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- Definition Amount of decrease to accumulated depreciation for real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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