Subsequent Events (Details) $ / shares in Units, $ in Thousands			3 Months Ended				9 Months Ended
	Oct. 15, 2020 $ / shares	Oct. 01, 2020 USD ($)	Sep. 30, 2020 USD ($) propertyUnit $ / shares	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) propertyUnit	Sep. 30, 2019 USD ($) $ / shares	Sep. 30, 2020 USD ($) propertyUnit $ / shares	Sep. 30, 2019 USD ($) $ / shares
Subsequent Event [Line Items]
Gains on disposition of property			$ 10,012			$ 3,515	$ 163,397	$ 10,218
2020 Dispositions [Member]
Subsequent Event [Line Items]
Purchase price of real estate			23,300	$ 2,800	$ 338,400
Gains on disposition of property			$ 9,400	$ (100)	$ 153,100
Number of buildings sold | propertyUnit			2		41		2
2020 Dispositions [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase price of real estate		$ 4,600
Gains on disposition of property		$ 1,300
Highwoods Properties, Inc. [Member]
Subsequent Event [Line Items]
Dividends on Common Stock (per share) | $ / shares			$ 0.48			$ 0.475	$ 1.44	$ 1.425
Highwoods Properties, Inc. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends on Common Stock (per share) | $ / shares	$ 0.48