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Real Estate Investments, Net - Dispositions (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 USD ($) property | Jun. 30, 2018 USD ($) property | Jun. 30, 2019 USD ($) property | Jun. 30, 2018 USD ($) property | Dec. 31, 2018 property
Real Estate [Line Items] |  |  |  |  |
Proceeds from dispositions of real estate investments, net | $ |  |  | $ 89,916 | $ 19,376 |
Gain (loss) on dispositions of real estate investments | $ | $ 6,923 | $ (3,818) | $ 7,815 | $ (3,818) |
Number of real estate properties held for sale | property | 1 |  | 4 |  | 3
Properties Sold |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Proceeds from dispositions of real estate investments, gross | $ | $ 83,300 |  | $ 92,800 |  |
United States |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Number of real estate properties sold | property | 63 |  | 64 |  |
United Kingdom |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Number of real estate properties sold | property | 1 |  | 1 |  |
San Jose, California |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Number of real estate properties sold | property |  | 1 |  | 1 |
San Jose, California | Properties Sold |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Proceeds from dispositions of real estate investments, gross | $ |  | $ 20,300 |  | $ 20,300 |
Proceeds from dispositions of real estate investments, net | $ |  | 1,300 |  | 1,300 |
Gain (loss) on dispositions of real estate investments | $ |  | $ 3,800 |  | $ (3,800) |
Family Dollar | United States |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Number of real estate properties sold | property | 62 |  | 62 |  |
Industrial Property | United States |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Number of real estate properties sold | property | 1 |  | 2 |  |

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- Definition The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. + 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=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(14)(d)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 + Details
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