XML 62 R50.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Subsequent Events - Additional Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Apr. 07, 2017 | Mar. 31, 2017 | Mar. 31, 2016
Subsequent Event [Line Items] |  |  |
Loss on sale of properties |  | $ (5,906) | $ 0
Subsequent event |  |  |
Subsequent Event [Line Items] |  |  |
Loss on sale of properties | $ 100 |  |
Disposed of by sale |  |  |
Subsequent Event [Line Items] |  |  |
Loss on sale of properties |  | $ (5,906) |
Hazelwood, Missouri | Subsequent event |  |  |
Subsequent Event [Line Items] |  |  |
Loss on sale of properties | 100 |  |
Hazelwood, Missouri | Disposed of by sale | Subsequent event |  |  |
Subsequent Event [Line Items] |  |  |
Consideration transferred for property sold | $ 2,100 |  |

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- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=good_HazelwoodMOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |