Organization and Business Operations (Details)
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3 Months Ended |
12 Months Ended |
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Nov. 27, 2018
USD ($)
shares
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Nov. 24, 2017
USD ($)
shares
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Mar. 31, 2018
USD ($)
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Dec. 31, 2018
USD ($)
real_estate_investment
property
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Dec. 31, 2017
USD ($)
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Dec. 31, 2016
USD ($)
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Mar. 31, 2019
real_estate_investment
property
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Nov. 27, 2017
USD ($)
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Oct. 13, 2017
USD ($)
shares
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May 29, 2014
USD ($)
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| Organization and Business Operations [Line Items] |
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| Common stock offering, gross proceeds raised |
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$ 34,096,000
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$ 118,605,000
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$ 386,091,000
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$ 314,836,000
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| Number of real estate investments owned | real_estate_investment |
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62
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62
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| Number of properties owned | property |
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85
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85
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| Initial Offering [Member] |
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| Organization and Business Operations [Line Items] |
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| Common stock offering including DRIP, value |
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$ 2,350,000,000
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| Common stock offering, value |
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2,250,000,000
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| Common stock offering pursuant to DRIP, value |
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$ 100,000,000
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| Initial Offering [Member] | Class A, I and T shares [Member] |
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| Organization and Business Operations [Line Items] |
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| Common stock offering including DRIP, shares issued | shares |
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125,095,000
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| Common stock offering including DRIP, gross proceeds raised |
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$ 1,223,803,000
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| DRIP Offering [Member] |
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| Organization and Business Operations [Line Items] |
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| Common stock offering pursuant to DRIP, value |
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$ 100,000,000
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| Common stock offering pursuant to DRIP, shares registered | shares |
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10,893,246
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| Follow-On Offering [Member] |
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| Organization and Business Operations [Line Items] |
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| Common stock offering, value |
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$ 1,000,000,000
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| Follow-On Offering [Member] | Class A, I, T and T2 shares [Member] |
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| Organization and Business Operations [Line Items] |
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| Common stock offering, shares issued | shares |
13,491,000
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| Common stock offering, gross proceeds raised |
$ 129,308,000
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| Common stock offering, value deregistered |
$ 870,692,000
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