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Description of Business and Significant Accounting Policies (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 30, 2020 USD ($) propertyUnit | Dec. 31, 2019 USD ($) a ft² propertyUnit customers shares | Sep. 30, 2019 USD ($) phase | Mar. 31, 2019 USD ($) ft² | Dec. 31, 2019 USD ($) a ft² propertyUnit customers shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2019 ft²
Description of Business [Abstract] |  |  |  |  |  |  |  |
Rentable square feet of commercial real estate (in square feet) | ft² |  | 31,700,000 |  |  | 31,700,000 |  |  |
Rentable square feet of commercial real estate under development (in square feet) | ft² |  | 1,200,000 |  |  | 1,200,000 |  |  |
Undeveloped land suitable for future development (in acres) | a |  | 275 |  |  | 275 |  |  |
Number of common units required to convert to one share of common stock (in shares) | shares |  | 1 |  |  | 1 |  |  |
Number of trading days preceeding Redemption Notice Date (in days) |  |  |  |  | 10 days |  |  |
Consolidated in-service office properties not wholly owned (in units) | propertyUnit |  | 3 |  |  | 3 |  |  |
Self insurance liability |  | $ 600 |  |  | $ 600 |  |  |
Credit losses on operating lease receivables |  |  |  |  | 9,861 | $ 1,212 | $ 1,508 |
Write-offs of lease incentives |  |  |  |  | (505) | (1,943) | (1,172) |
Write-offs of notes receivable |  |  |  |  | 4,087 | 0 | 0 |
Write-offs of tenant improvements and deferred leasing costs |  |  |  |  | 254,504 | 229,955 | 227,832 |
Real estate assets, depreciation expense |  |  |  |  | $ 214,700 | 191,000 | 184,400 |
Maturity of highly liquid investments (in months) |  |  |  |  | 3 months |  |  |
Percent of annual REIT taxable income required to pay to the Company's stockholders |  |  |  |  | 90.00% |  |  |
Customers with leases on wholly owned properties | customers |  | 1,785 |  |  | 1,785 |  |  |
Percent of annualized cash rental revenue derived from geographic locations |  | 10.00% |  |  | 10.00% |  |  |
Limit of consolidated revenue generated by any single customer |  |  |  |  | 5.00% |  |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Rentable square feet of commercial real estate under development (in square feet) | ft² |  |  |  |  |  |  |  | 150,000
VIE like-kind exchange agreement (in days) |  |  |  |  | 180 days |  |  |
VIE total assets |  | $ 425,000 |  |  | $ 425,000 |  |  |
VIE total liabilities |  | $ 24,000 |  |  | 24,000 |  |  |
VIe total cash flows |  |  |  |  | $ 2,500 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Adjustment interval of variable debt interest rates, mimimum (in months) |  |  |  |  | 1 month |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Adjustment interval of variable debt interest rates, mimimum (in months) |  |  |  |  | 3 months |  |  |
Building [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Property, plant and equipment useful life |  |  |  |  | 40 years |  |  |
Building Improvements [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Property, plant and equipment useful life |  |  |  |  | 15 years |  |  |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Property, plant and equipment useful life |  |  |  |  | 5 years |  |  |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Property, plant and equipment useful life |  |  |  |  | 7 years |  |  |
Leaseholds and Leasehold Improvements [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Property, plant and equipment useful life |  |  |  |  | 3 years |  |  |
Leaseholds and Leasehold Improvements [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Property, plant and equipment useful life |  |  |  |  | 10 years |  |  |
Submarket Acquisition [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Rentable square feet of commercial real estate (in square feet) | ft² |  | 841,000 |  |  | 841,000 |  |  |
Total investment cost of acquisition |  | $ 436,000 |  |  | $ 399,100 |  |  |
Division Exit [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Number of plan phases (in ones) | phase |  |  | 2 |  |  |  |  |
Purchase price of real estate |  |  | $ 436,000 |  |  |  |  |
Expected severance costs |  |  |  |  | $ 1,800 |  |  |
LSI Ceased Operations [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Rentable square feet of commercial real estate (in square feet) | ft² |  |  |  | 176,000 |  |  |  |
Credit losses on operating lease receivables |  |  |  | $ 5,600 |  |  |  |
Write-offs of lease incentives |  |  |  | 2,300 |  |  |  |
Write-offs of notes receivable |  |  |  | 4,100 |  |  |  |
Write-offs of tenant improvements and deferred leasing costs |  |  |  | $ 11,600 |  |  |  |
Highwoods Properties, Inc. [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Common Units of partnership owned (in shares) | shares |  | 103,300,000 |  |  | 103,300,000 |  |  |
Percentage of ownership of Common Units |  | 97.40% |  |  | 97.40% |  |  |
Common units redeemed for a like number of common shares of stock (in shares) | shares |  |  |  |  | 15,000 |  |  |
Highwoods Realty Limited Partnership [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Common Units of partnership not owned by the Company (in shares) | shares |  | 2,700,000 |  |  | 2,700,000 |  |  |
Credit losses on operating lease receivables |  |  |  |  | $ 9,861 | 1,212 | 1,508 |
Write-offs of lease incentives |  |  |  |  | (505) | (1,943) | (1,172) |
Write-offs of notes receivable |  |  |  |  | 4,087 | 0 | 0 |
Write-offs of tenant improvements and deferred leasing costs |  |  |  |  | $ 254,504 | $ 229,955 | $ 227,832 |
Subsequent Event [Member] | Division Exit [Member] |  |  |  |  |  |  |  |
Description of Business [Abstract] |  |  |  |  |  |  |  |
Purchase price of real estate | $ 193,400 |  |  |  |  |  |  |
Number of buildings sold | propertyUnit | 35 |  |  |  |  |  |  |

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