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Investments in Real Estate - Acquisitions (Details) ft² in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) ft² item | Dec. 31, 2016 USD ($) ft² item | Dec. 31, 2015 USD ($)
Investments in real estate properties |  |  |  |
Leasable square feet | ft² |  | 89.6 |  |
Total Revenue |  | $ 1,215,768,000 | $ 1,103,172,000 | $ 1,023,285,000
Net income |  | $ 319,318,000 | 316,477,000 | $ 284,855,000
Real Estate Investment |  |  |  |
Investments in real estate properties |  |  |  |
Number of investments in properties that caused any tenant to be 10% of more of total assets | item |  | 0 |  |
Total Revenue |  | $ 37,100,000 | 44,600,000 |
Net income |  | 17,900,000 | 22,000,000 |
Real Estate Investment | General and administrative expense |  |  |  |
Investments in real estate properties |  |  |  |
Acquisition transaction costs |  | 255,000 | 346,000 |
Real Estate Investment | New and under development or expansion |  |  |  |
Investments in real estate properties |  |  |  |
Value of properties acquired during the period |  | $ 1,520,000,000 | $ 1,860,000,000 |
Number of properties acquired during the period | item |  | 303 | 505 |
Initial weighted average contractual lease rate of properties acquired (as a percent) |  | 6.40% | 6.30% |
Number of states in which properties are located | item |  | 40 | 40 |
Leasable square feet | ft² |  | 7.8 | 8.2 |
Leased area (as a percent) |  | 100.00% | 100.00% |
Weighted average lease term |  | 14 years 4 months 24 days | 14 years 8 months 12 days |
Allocated to Land |  | $ 354,100,000 | $ 517,600,000 |
Allocated to Buildings and Improvements |  | 955,100,000 | 1,180,000,000 |
Allocated to Intangible Assets related to Leases |  | 228,000,000 | 204,500,000 |
Allocated to Intangible Liabilities related to Leases and Other Assumed Liabilities |  | 17,800,000 | 38,800,000 |
Contingent consideration associated with acquisition |  | $ 0 | $ 0 |
Real Estate Investment | New properties |  |  |  |
Investments in real estate properties |  |  |  |
Number of industries in which tenants operate | item |  | 23 | 28 |
Real Estate Investment | New properties | Retail |  |  |  |
Investments in real estate properties |  |  |  |
Property type- percentage of properties acquired |  | 94.50% | 86.40% |
Real Estate Investment | New properties | Industrial |  |  |  |
Investments in real estate properties |  |  |  |
Property type- percentage of properties acquired |  | 5.50% | 13.60% |
Real Estate Investment | Properties under development |  |  |  |
Investments in real estate properties |  |  |  |
Number of properties acquired during the period | item |  | 17 | 33 |
Initial weighted average contractual lease rate of properties acquired (as a percent) |  | 6.90% | 7.10% |
Investments in properties |  | $ 21,200,000 | $ 103,800,000 |
Real Estate Investment | Maximum |  |  |  |
Investments in real estate properties |  |  |  |
Investments to any one tenant as a percentage of total assets |  | 10.00% |  |
ASU 2017-10 | Real Estate Investment |  |  |  |
Investments in real estate properties |  |  |  |
Acquisition transaction costs | $ 34,000 |  |  |

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- Definition Represents the investments of the entity in any one tenant of the acquired properties, expressed as a percentage of total assets. + References No definition available. + Details
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- Definition Represents the portion of real estate properties leased during the period with existing tenant lease agreements in place expressed as a percentage of total area. + References No definition available. + Details
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- Definition The number of states in which the real estate properties acquired during the period operate. + References No definition available. + Details
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- Definition Represents the number of industries in which tenants of the real estate properties acquired during the period operate. + References No definition available. + Details
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- Definition Represents the percentage of the real estate properties acquired during the period by the type of real estate. + References No definition available. + Details
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- Definition For new properties during the period, the weighted average contractual lease rate computed as estimated contractual net operating income (in a net-leased property that is equal to the aggregate base rent or, in the case of properties under development, the estimated aggregate base rent under the lease) for the first year of each lease, divided by the estimated total cost of the properties. + References No definition available. + Details
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- Definition Average period of time covered by real estate lease contracts. + References No definition available. + Details
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- Definition Represents the buildings and improvements recorded as part of the real estate acquisition. + References No definition available. + Details
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- Definition Represents the Intangible and assumed liabilities recorded as part of the real estate acquisition. + References No definition available. + Details
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- Definition Represents the intangible assets recorded as part of the real estate acquisition. + References No definition available. + Details
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- Definition Represents the land recorded as part of the real estate acquisition. + References No definition available. + Details
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- Definition Represents the direct costs incurred in the acquisition of real estate properties, including legal, accounting and other costs. + References No definition available. + Details
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- Definition Represents the number of investments in properties that caused any tenant to be 10 percent or more of total assets. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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