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

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.

No definition available.

Name:	hiw_ImpairedRealEstateAssetsFairValueDisclosure
Namespace Prefix:	hiw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant