XML 57 R45.htm IDEA: XBRL DOCUMENT
v3.24.3

Equity - Additional Information (Details) |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 36 Months Ended | 54 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 17, 2024 USD ($) $ / shares | Nov. 09, 2022 $ / shares shares | Apr. 03, 2020 $ / shares shares | Apr. 01, 2020 USD ($) security | Jan. 31, 2021 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares | Sep. 30, 2023 USD ($) shares | Sep. 30, 2024 USD ($) $ / shares shares | Sep. 30, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2022 USD ($) shares | Sep. 30, 2024 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares | Dec. 31, 2023 $ / shares shares | Apr. 13, 2023 USD ($)
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  | 35,838,442 |  | 35,838,442 |  |  |  | 35,838,442 | 35,838,442 | 35,838,442 |
OP Unit Holder |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's ownership |  |  |  |  |  | 100.00% |  | 100.00% |  |  |  | 100.00% | 100.00% | 100.00% |
Minimum period required to exercise, in months |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |
Operating units, conversion ratio |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 9,954,863 |  | 9,954,863 |  |  |  | 9,954,863 | 9,954,863 | 10,156,509 |
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.001 |  | $ 0.001 |  |  |  | $ 0.001 | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized (in shares) |  |  |  |  |  | 25,700,791 |  | 25,700,791 |  |  |  | 25,700,791 | 25,700,791 | 25,902,437 |
Redemptions of preferred stock | $ |  |  |  |  |  | $ 2,440,000 |  | $ 4,202,000 | $ 1,156,000 |  |  |  |  |  |
Share repurchase program, authorized amount | $ | $ 35,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend rate |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 10,200,000 |  |  |  |  |  |  | 10,200,000 | 10,200,000 |  |  |  |
Average sales price of common stock sold (in dollars per share) | $ / shares |  |  | $ 25.00 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized, pursuant to DRIP (in shares) |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock pursuant to DRIP (in dollars per share) | $ / shares |  |  | $ 22.75 |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction, gross | $ |  |  |  |  |  |  |  |  |  | $ 252,600,000 |  |  |  |  |
Consideration received, net | $ |  |  |  |  |  |  |  |  |  |  | $ 230,500,000 |  |  |  |
Preferred stock, shares issued, pursuant to DRIP (in shares) |  |  |  |  |  |  | 0 |  | 14,069 |  |  |  |  |  |
Redemptions of preferred stock (in shares) |  |  |  |  |  | 115,604 |  | 201,646 | 48,913 |  |  |  |  |  |
Redemptions of preferred stock | $ |  |  |  |  |  |  |  |  | $ 1,200,000 |  |  |  |  |  |
Series D Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  | 2,415,000 | 2,415,000 |  | 2,415,000 |  |  |  | 2,415,000 | 2,415,000 | 2,415,000 |
Dividend rate |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  |  | $ 0.001 | $ 0.001 |  | $ 0.001 |  |  |  | $ 0.001 | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized (in shares) |  |  |  |  |  | 3,600,000 |  | 3,600,000 |  |  |  | 3,600,000 | 3,600,000 | 3,600,000 |
Series D Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  | $ 58,300,000 |  |  |  |  |  |  |  |  |  |
Series E Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 251,576 |  | 251,576 |  |  |  | 251,576 | 251,576 | 235,841 |
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.001 |  | $ 0.001 |  |  |  | $ 0.001 | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized (in shares) |  |  |  |  |  | 15,998,400 |  | 15,998,400 |  |  |  | 15,998,400 | 15,998,400 | 15,998,400 |
Redemptions of preferred stock | $ |  |  |  |  |  |  | $ 36,000 |  | 36,000 |  |  |  |  |  |
Series E Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  |  | $ 89,000 | $ 2,188,000 | $ 393,000 | $ 5,566,000 |  |  |  |  |  |
Dividend rate |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Average sales price of common stock sold (in dollars per share) | $ / shares |  | $ 25.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Redemptions of preferred stock (in shares) |  |  |  |  |  |  | 1,600 |  | 1,600 |  |  |  |  |  |
Maximum amount of securities can be sold under shelf registration statement (in shares) |  | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares sold (in shares) |  |  |  |  |  | 3,595 | 87,672 | 15,735 | 223,081 |  |  |  |  |  |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 5,840,889 |  | 5,840,889 |  |  |  | 5,840,889 | 5,840,889 | 5,956,065 |
Dividend rate | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |  |  | $ 0.001 |  | $ 0.001 |  |  |  | $ 0.001 | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized (in shares) |  |  |  |  |  | 6,340,889 |  | 6,340,889 |  |  |  | 6,340,889 | 6,340,889 | 6,456,065 |
Redemptions of preferred stock | $ |  |  |  |  |  | $ 1,296,000 |  | $ 2,429,000 |  |  |  |  |  |  |
Share repurchase program, authorized amount | $ | $ 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemptions of preferred stock (in shares) |  |  |  |  |  | 60,441 |  | 115,176 |  |  |  |  |  |  |
2020 Registration Statement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities allowed for issuance (amount up to) | $ |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  | $ 1,500,000,000
Maximum number of securities that can be sold | security |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
2020 Registration Statement | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 124,460 |  | 124,460 |  |  |  | 124,460 | 124,460 |  |
2020 Registration Statement | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  |  |  |  |  |  |  |  | $ 2,200,000 | $ 280,900,000 |  |
Common stock, shares issued (in shares) |  |  |  |  |  | 14,367,524 |  | 14,367,524 |  |  |  | 14,367,524 | 14,367,524 |  |
2020 Registration Statement | Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 10,254,072 |  | 10,254,072 |  |  |  | 10,254,072 | 10,254,072 |  |
2020 Registration Statement | Series C Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 253,900,000 |  |
2020 Registration Statement | Series D Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 2,415,000 |  | 2,415,000 |  |  |  | 2,415,000 | 2,415,000 |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 60,400,000 |  |
2020 Registration Statement | Series E Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 175,335 |  | 175,335 |  |  |  | 175,335 | 175,335 |  |
2020 Registration Statement | Series E Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  | 77,841 |  | 77,841 |  |  |  | 77,841 | 77,841 |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  |  |  |  |  |  |  |  | $ 4,400,000 | $ 1,900,000 |  |
ATM Program | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of preferred and common equity | $ |  |  |  |  |  |  | $ 1,012,000 |  | $ 15,240,000 |  |  |  |  |  |
Common stock, value authorized | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000
Number of shares sold (in shares) |  |  |  |  |  | 0 | 58,360 | 0 | 788,045 |  |  |  |  |  |

X
- Definition Common Stock Value Authorized Under Equity Offering Program + References No definition available. + Details
Name: | land_CommonStockValueAuthorizedUnderEquityOfferingProgram
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum Amount Of Securities Can Be Sold Under Shelf Registration Statement + References No definition available. + Details
Name: | land_MaximumAmountOfSecuritiesCanBeSoldUnderShelfRegistrationStatement
Namespace Prefix: | land_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum Number Of Securities Can Be Sold Under Shelf Registration Statement + References No definition available. + Details
Name: | land_MaximumNumberOfSecuritiesCanBeSoldUnderShelfRegistrationStatement
Namespace Prefix: | land_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Noncontrolling Interest, Minimum Ownership Period Required To Convert Units Held + References No definition available. + Details
Name: | land_NoncontrollingInterestMinimumOwnershipPeriodRequiredToConvertUnitsHeld
Namespace Prefix: | land_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Units, Conversion Ratio + References No definition available. + Details
Name: | land_OperatingUnitsConversionRatio
Namespace Prefix: | land_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Shares Authorized, Dividend Reinvestment Plan + References No definition available. + Details
Name: | land_PreferredStockSharesAuthorizedDividendReinvestmentPlan
Namespace Prefix: | land_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Stock, Shares Issued, Dividend Reinvestment Plan + References No definition available. + Details
Name: | land_PreferredStockSharesIssuedDividendReinvestmentPlan
Namespace Prefix: | land_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sale of Stock, Consideration Received, Net + References No definition available. + Details
Name: | land_SaleOfStockConsiderationReceivedNet
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sale Of Stock, Consideration Received On Transaction, Gross + References No definition available. + Details
Name: | land_SaleOfStockConsiderationReceivedOnTransactionGross
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sale of Stock, Price Per Share, Dividend Reinvestment Plan + References No definition available. + Details
Name: | land_SaleOfStockPricePerShareDividendReinvestmentPlan
Namespace Prefix: | land_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of Securities Allowed For Issuance + References No definition available. + Details
Name: | land_ValueOfSecuritiesAllowedForIssuance
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
Name: | srt_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage rate used to calculate dividend payments on preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-12A(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6 + Details
Name: | us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(16)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 + Details
Name: | us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 + Details
Name: | us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 + Details
Name: | us-gaap_StockRedeemedOrCalledDuringPeriodValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SubsidiarySaleOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_OwnershipAxis=land_OPUnitHolderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesEPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=land_UniversalRegistrationStatementThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=land_AtMarketProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |