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Real Estate and Intangible Assets - Significant Existing Real Estate Activity (Details) $ in Thousands |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 01, 2017 lease | Jun. 30, 2019 USD ($) a lease | Dec. 31, 2018 USD ($) pivot | Jun. 30, 2018 a
Real Estate Properties [Line Items] |  |  |  |
Number of Leases | 2 |  |  |
Total Acres | a |  | 75,886 |  | 63,325
Capital Commitment |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Commitment to provide capital | $ |  | $ 420 |  |
Colorado |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Total Acres | a |  | 31,448 |  | 31,450
Number of irrigation pivots | pivot |  |  | 23 |
Expended or accrued for capital improvements | $ |  |  | $ 1,400 |
Additional annualized straight-line rental income | $ |  | $ 117 |  |
Arizona, California, Florida, Michigan and Nebraska |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Number of Leases |  | 15 |  |
Total Acres | a |  | 6,817 |  |
Prior Leases | Arizona, California, Florida, Michigan and Nebraska |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Total annualized straight-line rent | $ |  | $ 3,385,000 |  |
Number of Leases with Participation Rents |  | 1 |  |
Lease Structures - Number of NNN Leases |  | 10 |  |
Lease Structures - Number of NN Leases |  | 5 |  |
New Leases | Arizona, California, Florida, Michigan and Nebraska |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Total annualized straight-line rent | $ |  | $ 3,648,000 |  |
Number of Leases with Participation Rents |  | 3 |  |
Lease Term |  | 3 years 10 months 26 days |  |
Lease Structures - Number of NNN Leases |  | 10 |  |
Lease Structures - Number of NN Leases |  | 5 |  |

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