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Equity - Non-Controlling Interests in OP (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018 | Dec. 31, 2017
Limited Partners' Capital Account [Line Items] |  |  |
Price per share of OP units redeemed for cash (in dollars per share) | $ 13.21 | $ 13.21 |
Gladstone Land Limited Partnership |  |  |
Limited Partners' Capital Account [Line Items] |  |  |
Company's ownership percent (as percent) | 96.00% | 96.00% | 93.20%
OP units held by non-controlling limited partners (in shares) |  | 670,879 | 1,008,105
OP units held by non-controlling interest limited partners (in shares) | 670,879 | 670,879 |
Gladstone Land Limited Partnership | Limited Partner |  |  |
Limited Partners' Capital Account [Line Items] |  |  |
OP units redeemed (in shares) | 46,544 | 337,226 |
Common stock issued (in shares) | 46,544 | 297,811 |
Conversion of units (in shares) | 46,544 | 297,811 |
OP units redeemed for cash (in shares) |  | 39,415 |
OP units redeemed for cash |  | $ 521 |

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- Definition Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
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