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Real Estate and Intangible Assets - Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Business Acquisition [Line Items] |  |
Total purchase price | $ 71,965 | $ 6,318
Land value subject to land lease agreement | 2,711 |
Loan receivable | 53 |
Prepaid rent | 62 |
Customer relationships |  |
Business Acquisition [Line Items] |  |
Assets acquired | 2,223 | 196
Above market leases |  |
Business Acquisition [Line Items] |  |
Assets acquired | 210 | 23
Below market leases |  |
Business Acquisition [Line Items] |  |
Liabilities assumed | (1,752) | 0
Land (1) |  |
Business Acquisition [Line Items] |  |
Assets acquired | 7,296 | 726
Building and improvements |  |
Business Acquisition [Line Items] |  |
Assets acquired | 54,000 | 4,541
Tenant Improvements |  |
Business Acquisition [Line Items] |  |
Assets acquired | 1,285 | 93
In-place leases |  |
Business Acquisition [Line Items] |  |
Assets acquired | 4,442 | 432
Leasing costs |  |
Business Acquisition [Line Items] |  |
Assets acquired | $ 4,261 | $ 307

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