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v3.19.3.a.u2

Real Estate Assets (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) a ft² propertyUnit parcel | Dec. 31, 2019 USD ($) a ft² propertyUnit parcel | Dec. 31, 2018 USD ($) a propertyUnit parcel | Dec. 31, 2017 USD ($) propertyUnit
Acquisitions [Abstract] |  |  |  |
Rentable square feet of commercial real estate (in square feet) | ft² | 31,700,000 | 31,700,000 |  |
Undeveloped land suitable for future development (in acres) | a | 275 | 275 |  |
Dispositions [Abstract] |  |  |  |
Gains on disposition of property |  | $ 39,517 | $ 37,638 | $ 54,157
Impairments [Abstract] |  |  |  |
Impairments of real estate assets |  | $ 5,849 | $ 423 | 1,445
Submarket Acquisition [Member] |  |  |  |
Acquisitions [Abstract] |  |  |  |
Rentable square feet of commercial real estate (in square feet) | ft² | 841,000 | 841,000 |  |
Purchase price of acquisition | $ 436,000 | $ 399,100 |  |
2019 Land Acquisitions [Member] |  |  |  |
Acquisitions [Abstract] |  |  |  |
Number of development parcels acquired (in parcels) | parcel | 4 | 4 |  |
Undeveloped land suitable for future development (in acres) | a | 10 | 10 |  |
Purchase price of acquisition |  | $ 12,400 |  |
Nashville TN Land Acquisition (03/2018) [Member] |  |  |  |
Acquisitions [Abstract] |  |  |  |
Number of development parcels acquired (in parcels) | parcel |  |  | 2 |
Undeveloped land suitable for future development (in acres) | a |  |  | 9 |
Purchase price of acquisition |  |  | $ 50,600 |
Fee Simple Title Raleigh, NC (03/2017) [Member] |  |  |  |
Acquisitions [Abstract] |  |  |  |
Purchase price of acquisition |  |  |  | $ 2,600
2019 Dispositions [Member] |  |  |  |
Dispositions [Abstract] |  |  |  |
Number of buildings sold | propertyUnit | 6 | 6 |  |
Purchase price of real estate |  | $ 136,400 |  |
Gains on disposition of property |  | 39,500 |  |
2018 Dispositions [Member] |  |  |  |
Dispositions [Abstract] |  |  |  |
Number of buildings sold | propertyUnit |  |  | 3 |
Purchase price of real estate |  |  | $ 90,600 |
Gains on disposition of property |  |  | 37,600 |
2017 Dispositions [Member] |  |  |  |
Dispositions [Abstract] |  |  |  |
Number of buildings sold | propertyUnit |  |  |  | 15
Purchase price of real estate |  |  |  | $ 135,600
Closing credits excluded for unfunded building and/or tenant improvements |  |  |  | 3,700
Gains on disposition of property |  |  |  | 54,200
2019 Impairments [Member] |  |  |  |
Impairments [Abstract] |  |  |  |
Impairments of real estate assets |  | $ 5,800 |  |
2018 Impairments [Member] |  |  |  |
Impairments [Abstract] |  |  |  |
Impairments of real estate assets |  |  | $ 400 |
2017 Impairments [Member] |  |  |  |
Impairments [Abstract] |  |  |  |
Impairments of real estate assets |  |  |  | $ 1,400

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