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Investments in Real Estate - Acquisitions (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) ft² state property_investment industry property | Dec. 31, 2017 USD ($) ft² state industry property | Dec. 31, 2016 USD ($)
Investments in real estate properties |  |  |
Leasable square feet | ft² | 93,300,000 |  |
Net income | $ 364,598,000 | $ 319,318,000 | $ 316,477,000
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 | property_investment | 0 |  |
Revenues | $ 57,300,000 | 37,100,000 |
Net income | 30,900,000 | 17,900,000 |
Real Estate Investment | New and under development or expansion |  |  |
Investments in real estate properties |  |  |
Value of properties acquired during the period | $ 1,800,000,000 | $ 1,520,000,000 |
Number of properties acquired during the period | property | 764 | 303 |
Initial weighted average contractual lease rate of properties acquired (as a percent) | 6.40% | 6.40% |
Number of states in which properties are located | state | 39 | 40 |
Leasable square feet | ft² | 5,200,000 | 7,800,000 |
Leased area (as a percent) | 100.00% | 100.00% |
Weighted average lease term | 14 years 9 months 18 days | 14 years 4 months 24 days |
Property investments allocated to land | $ 657,900,000 | $ 365,000,000 |
Property investments allocated to buildings and improvements | 1,000,000,000 | 955,200,000 |
Property investments allocated to lease-related intangible assets | 135,200,000 | 246,300,000 |
Property investments allocated to lease-related intangible liabilities and other assumed liabilities | 35,800,000 | 47,000,000 |
Contingent consideration associated with acquisition | $ 0 | $ 0 |
Real Estate Investment | New properties |  |  |
Investments in real estate properties |  |  |
Number of industries in which tenants operate | industry | 21 | 23 |
Real Estate Investment | New properties | Retail |  |  |
Investments in real estate properties |  |  |
Property type acquired (as a percent) | 96.30% | 94.50% |
Real Estate Investment | New properties | Industrial |  |  |
Investments in real estate properties |  |  |
Property type acquired (as a percent) | 3.70% | 5.50% |
Real Estate Investment | Properties under development |  |  |
Investments in real estate properties |  |  |
Value of properties acquired during the period | $ 80,300,000 | $ 21,200,000 |
Number of properties acquired during the period | property | 14 | 17 |
Initial weighted average contractual lease rate of properties acquired (as a percent) | 6.90% | 6.90% |
Real Estate Investment | Maximum |  |  |
Investments in real estate properties |  |  |
Investments to any one tenant as a percentage of total assets | 10.00% |  |

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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 land recorded as part of the real estate acquisition. + 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 Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
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