Description of Business and Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($) a ft² propertyUnit numberOfLoans shares	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) a ft² propertyUnit numberOfLoans $ / shares shares	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jul. 20, 2021 USD ($)
Description of Business [Abstract]
Rentable square feet of commercial real estate properties (in sq feet) | ft²	27,300,000		27,300,000
Rentable square feet of commercial real estate office properties under development (in sq feet) | ft²	800,000		800,000
Undeveloped land suitable for future development (in acres) | a	250		250
Net proceeds of Common Stock sold during the period	$ 7,095	$ 362	$ 5,897	$ 1,401
Self insurance liability	400		400
Deferred rents included in accounts receivable	$ 1,600		$ 1,600
PAC Portfolio Acquisition [Member]
Description of Business [Abstract]
Rentable square feet of commercial real estate properties (in sq feet) | ft²	1,630,000		1,630,000
Number of office properties acquired | propertyUnit	4		4
Number of redevelopment properties acquired | propertyUnit	1		1
Number of non-core assets acquired | propertyUnit	2		2
Acquisition purchase price	$ 769,000
Near-term building improvements included in acquisition	28,000		$ 28,000
Transaction costs	$ 5,000		$ 5,000
Number of loans assumed in acquisition | numberOfLoans	4		4
Fair value of debt assumed from the acquisition	$ 403,000		$ 403,000
Effective interest rate of secured debt assumed from the acquisition	3.70%		3.70%
Term of debt instrument, in years	10 years 9 months 18 days
Percentage of total investment related to non-core assets	12.00%		12.00%
Anticipated period of close date scheduled (in days)	30 days		30 days
Earnest money deposits	$ 55,000		$ 55,000
PAC Portfolio Acquisition [Member] | Subsequent Event [Member]
Description of Business [Abstract]
Earnest money deposits						$ 60,000
Highwoods Properties, Inc. [Member]
Description of Business [Abstract]
Common Units of partnership owned by the Company (in shares) | shares	103,800,000		103,800,000
Percentage of ownership of Common Units (in hundredths)	97.30%		97.30%
Common Units redeemed for a like number of common shares of stock (in shares) | shares			1,000
Highwoods Properties, Inc. [Member] | ATM Equity Offering
Description of Business [Abstract]
Net proceeds of Common Stock sold during the period			$ 6,800
Number of Common Stock sold during the period (in shares) | shares			149,100
Average price of Common Stock sold during the period (in dollars per share) | $ / shares			$ 46.11
Highwoods Properties, Inc. [Member] | ATM Equity Offering | Maximum [Member]
Description of Business [Abstract]
Net proceeds of Common Stock sold during the period					$ 300,000
Highwoods Realty Limited Partnership [Member]
Description of Business [Abstract]
Common Units of partnership not owned by the Company (in shares) | shares	2,800,000		2,800,000