Description of Business and Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) ft² numberOfEntities numberOfJointVentures shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) ft² numberOfEntities numberOfJointVentures $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021	Dec. 31, 2019 ft²
Description of Business [Abstract]
Rentable square feet of commercial real estate properties (in sq feet) | ft²	28,100,000		28,100,000
Rentable square feet of commercial real estate office properties under development (in sq feet) | ft²	1,400,000		1,400,000
Rentable square feet of potential office build (in sq feet) | ft²	5,000,000		5,000,000
Net proceeds of Common Stock sold during the period	$ 362,000	$ 7,508,000	$ 4,797,000	$ 13,405,000
VIE like-kind exchange agreement (in days)	180 days
Number of VIE entities | numberOfEntities	4		4
Self insurance liability	$ 600,000		$ 600,000
Pittsburgh Division Office [Member]
Description of Business [Abstract]
Rentable square feet of commercial real estate properties (in sq feet) | ft²	2,155,000		2,155,000
Percentage of rentable square feet occupied (in hundredths)	90.30%		90.30%
Percent of NOI (in hundredths)	6.00%		6.00%
Dallas Joint Ventures [Member]
Description of Business [Abstract]
Number of joint ventures formed | numberOfJointVentures	2		2
Percentage of equity interest in joint venture (in hundredths)	50.00%		50.00%
Cash funded to acquire interest in joint venture	$ 55,700,000		$ 55,700,000
Granite Park Six [Member]
Description of Business [Abstract]
Rentable square feet of commercial real estate office properties under development (in sq feet) | ft²	422,000		422,000
Percentage of equity interest in joint venture (in hundredths)	50.00%		50.00%
Construction loan related to joint venture development	$ 115,000,000		$ 115,000,000
Interest rate cap with respect to construction loan	3.50%		3.50%
Notional amount of borrowings, subject to cap	$ 95,200,000		$ 95,200,000
Granite Park Six [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Description of Business [Abstract]
Facility interest rate basis	SOFR
Interest rate, basis spread (in hundredths)	3.94%
Granite Park Six [Member] | JV Construction Loan Outstanding, Granite Park 6 [Member]
Description of Business [Abstract]
Construction loan related to joint venture development	$ 0		$ 0
23Springs [Member]
Description of Business [Abstract]
Rentable square feet of commercial real estate office properties under development (in sq feet) | ft²	642,000		642,000
Percentage of equity interest in joint venture (in hundredths)	50.00%		50.00%
Construction loan related to joint venture development	$ 265,000,000		$ 265,000,000
Interest rate cap with respect to construction loan	3.50%		3.50%
Notional amount of borrowings, subject to cap	$ 83,000,000		$ 83,000,000
23Springs [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Description of Business [Abstract]
Facility interest rate basis	SOFR
Interest rate, basis spread (in hundredths)	3.55%
23Springs [Member] | JV Construction Loan Outstanding, 23Springs [Member]
Description of Business [Abstract]
Construction loan related to joint venture development	$ 0		$ 0
Highwoods Properties, Inc. [Member]
Description of Business [Abstract]
Common Units of partnership owned by the Company (in shares) | shares	104,800,000		104,800,000
Percentage of ownership of Common Units (in hundredths)	97.80%		97.80%			97.70%
Common Units redeemed for a like number of common shares of stock (in shares) | shares			30,909
Common Units redeemed for cash (in shares) | shares			91,887
Highwoods Properties, Inc. [Member] | ATM Equity Offering
Description of Business [Abstract]
Net proceeds of Common Stock sold during the period			$ 6,000,000
Number of Common Stock sold during the period (in shares) | shares			130,011
Average price of Common Stock sold during the period (in dollars per share) | $ / shares			$ 46.50
Highwoods Properties, Inc. [Member] | ATM Equity Offering | Maximum [Member]
Description of Business [Abstract]
Net proceeds of Common Stock sold during the period					$ 300,000,000
Highwoods Realty Limited Partnership
Description of Business [Abstract]
Common Units of partnership not owned by the Company (in shares) | shares	2,400,000		2,400,000
Variable Interest Entity, Primary Beneficiary [Member]
Description of Business [Abstract]
Rentable square feet of commercial real estate office properties under development (in sq feet) | ft²							150,000
Number of VIE entities | numberOfEntities	1		1
Variable Interest Entity, Non Primary Beneficiary [Member]
Description of Business [Abstract]
Number of VIE entities | numberOfEntities	3		3