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Real Estate and Intangible Assets - Purchase Price Allocations (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Sep. 30, 2017
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2018 New Real Estate Activity |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | $ 51,845 |
2018 New Real Estate Activity | Horticulture |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 1,548 |
2018 New Real Estate Activity | Horticulture |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 4,288 |
2018 New Real Estate Activity | Buildings |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 0 |
2018 New Real Estate Activity | Leasehold interest – land |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 0 |
2018 New Real Estate Activity | In-place leases |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 626 |
2018 New Real Estate Activity | Leasing costs |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 511 |
2018 New Real Estate Activity | Net Below-Market Leases |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 0 |
2018 New Real Estate Activity | Land and Land Improvements |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | 44,749 |
2018 New Real Estate Activity | Buildings |  |
Business Acquisition [Line Items] |  |
Total Purchase Price | $ 123 |
2017 New Real Estate Activity |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | $ 121,847
2017 New Real Estate Activity | Horticulture |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 11,534
2017 New Real Estate Activity | Horticulture |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 12,611
2017 New Real Estate Activity | Buildings |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 824
2017 New Real Estate Activity | Leasehold interest – land |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 3,488
2017 New Real Estate Activity | In-place leases |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 487
2017 New Real Estate Activity | Leasing costs |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 508
2017 New Real Estate Activity | Net Below-Market Leases |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | (23)
2017 New Real Estate Activity | Land and Land Improvements |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | 89,614
2017 New Real Estate Activity | Buildings |  |
Business Acquisition [Line Items] |  |
Total Purchase Price |  | $ 2,804

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