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Fair Value Measures and Disclosures - Fair Value Measurement Inputs and Valuation Techniques (Details) $ in Thousands | Sep. 30, 2025 USD ($) numberOfAssets | Dec. 31, 2024 USD ($)
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Fair Value Measurement Inputs and Valuation Techniques [Abstract] |  |
Impaired real estate assets | $ | $ 19,600 | $ 26,740
Number of assets | numberOfAssets | 2 |

X
- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity in connection with the fair value disclosures required in the footnotes to the financial statements. This item represents impaired real estate assets recorded at fair value on a non-recurring basis as a result of quarterly impairment analysis. + References No definition available. + Details
Name: | hiw_ImpairedRealEstateAssetsFairValueDisclosure
Namespace Prefix: | hiw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of assets + References No definition available. + Details
Name: | hiw_NumberOfAssets
Namespace Prefix: | hiw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FairValueInputsQuantitativeInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration