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Schedule III (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets $ 6,486,136 $ 5,594,833 $ 5,776,804
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,457,511 1,421,956 1,405,341
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Federal Income Tax Basis 6,000,000    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, beginning balance 5,594,833 5,776,804 5,296,551
Acquisitions, development and improvements 1,248,256 259,470 677,842
Cost of real estate sold and retired (356,953) (441,441) (197,589)
Real estate assets, ending balance 6,486,136 5,594,833 5,776,804
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, beginning balance 1,421,956 1,405,341 1,296,562
Depreciation expense 218,628 204,585 214,682
Real estate sold and retired (183,073) (187,970) (105,903)
Accumulated depreciation, ending balance 1,457,511 1,421,956 1,405,341
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,486,136 5,594,833 5,776,804
Development in process exclusive of land included in Schedule III 6,890 259,681 172,706
Real estate assets, net, held for sale (3,482) (14,850) (34,396)
Total real estate assets 6,489,544 5,839,664 5,915,114
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,457,511 1,421,956 1,405,341
Real estate assets, net, held for sale 0 (3,577) (16,775)
Total accumulated depreciation 1,457,511 $ 1,418,379 $ 1,388,566
Atlanta, GA - 1700 Century Circle [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 2,482    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 2    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,431    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 3,913    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,915    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,110    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,915    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,110    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,915    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,110    
Atlanta, GA - 1800 Century Boulevard [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 29,081    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,935    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,444    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 36,016    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 37,460    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,861    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 37,460    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 20,861    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 37,460    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,861    
Atlanta, GA - 1825 Century Boulevard [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 864    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 303    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 15,181    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,167    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 15,181    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,207    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,207    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,348    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,207    
Atlanta, GA - 1875 Century Boulevard [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 8,924    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,820    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 17,744    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,744    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,491    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,744    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,491    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,744    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,491    
Atlanta, GA - 1900 Century Boulevard [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,744    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 340    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,084    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,084    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,084    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,084    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,084    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,084    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,084    
Atlanta, GA - 2200 Century Parkway [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 14,432    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 9,012    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 23,444    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 23,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,327    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 23,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 12,327    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 23,444    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,327    
Atlanta, GA - 2400 Century Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 406    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 14,785    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 406    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 14,785    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,191    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,262    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,191    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,262    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,191    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,262    
Atlanta, GA - 2500 Century Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 328    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,824    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 328    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,824    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,152    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,035    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,152    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,035    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,152    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,035    
Atlanta, GA - 2500/2635 Parking Garage [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,447    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,447    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,447    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,594    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,447    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,594    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,447    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,594    
Atlanta, GA - 2600 Century Parkway [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 10,679    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,694    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 16,373    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,373    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,514    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,373    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,514    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,373    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,514    
Atlanta, GA - 2635 Century Parkway [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 21,643    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 20,711    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 42,354    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 42,354    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,219    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 42,354    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 20,219    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 42,354    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,219    
Atlanta, GA - 2800 Century Parkway [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 20,449    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,852    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 32,301    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,130    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 32,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 19,130    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 32,301    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,130    
Atlanta, GA - Century Plaza I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,290    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 8,567    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,746    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,290    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,313    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,603    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,206    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,603    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,206    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,603    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,206    
Atlanta, GA - Century Plaza II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,380    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 7,733    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,119    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,380    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,852    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,232    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,904    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,232    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,904    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,232    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,904    
Atlanta, GA - Riverpoint - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 7,250    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (4,649)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 718    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,601    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 718    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,319    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 203    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,319    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 203    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,319    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 203    
Atlanta, GA - Riverwood 100 [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,785    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 64,913    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (29)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 25,295    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,756    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 90,208    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 95,964    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,300    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 95,964    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 26,300    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 95,964    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,300    
Atlanta, GA - Tradeport - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,243    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (4,733)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 510    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 510    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 510    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 510    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Atlanta, GA - Two Alliance Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 9,579    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 125,549    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 555    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 9,579    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 126,104    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 135,683    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 34,023    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 135,683    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 34,023    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 135,683    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 34,023    
Atlanta, GA - One Alliance Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 14,775    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 123,071    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 21,171    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 14,775    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 144,242    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 159,017    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 35,121    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 159,017    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 35,121    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 159,017    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 35,121    
Atlanta, GA - 10 Glenlake North [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,349    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 26,334    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7,754    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,349    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 34,088    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 39,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,341    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 39,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,341    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 39,437    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,341    
Atlanta, GA - 10 Glenlake South [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,103    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 22,811    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,234    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,103    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 28,045    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 33,148    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,177    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 33,148    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,177    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 33,148    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,177    
Atlanta, GA - Riverwood 200 [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,777    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 89,708    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 450    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,995    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,227    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 92,703    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 97,930    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,342    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 97,930    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,342    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 97,930    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,342    
Atlanta, GA - Riverwood 300 - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 400    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 710    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 400    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 710    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,110    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 87    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 1,110    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 87    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 1,110    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 87    
Atlanta, GA - Monarch Tower [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 22,717    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 143,068    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 19,398    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 22,717    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 162,466    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 185,183    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 30,985    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 185,183    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 30,985    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 185,183    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 30,985    
Atlanta, GA - Monarch Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 27,678    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 88,962    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,410    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 27,678    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 101,372    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 129,050    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,148    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 129,050    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 19,148    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 129,050    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,148    
Atlanta, GA - Galleria 75 [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 19,740    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 19,740    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,740    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,740    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,740    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Charlotte, NC - Bank of America Tower [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 29,273    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 354,749    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 21,466    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 29,273    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 376,215    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 405,488    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,734    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 405,488    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 23,734    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 405,488    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,734    
Charlotte, NC - Morrocroft [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 69,421    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 19,286    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 177,199    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 19,286    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 177,199    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 196,485    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,660    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 196,485    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,660    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 196,485    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,660    
Charlotte, NC - Capitol Towers [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 130,498    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 9,202    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 102,179    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 9,202    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 102,179    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 111,381    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,351    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 111,381    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,351    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 111,381    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,351    
Nashville, TN - 3322 West End [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,025    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 27,490    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,054    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,025    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 39,544    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 42,569    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,091    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 42,569    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 20,091    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 42,569    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,091    
Nashville, TN - 3401 West End [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,862    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 22,917    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,755    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,862    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 29,672    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,937    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 35,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 16,937    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 35,534    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,937    
Nashville, TN - 5310 Maryland Way [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,863    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 7,201    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,796    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,863    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,997    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,860    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,051    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,860    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,051    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,860    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,051    
Nashville, TN - Cool Springs I & II Deck [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,994    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 3,994    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,415    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,415    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,994    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,415    
Nashville, TN - Cool Springs III & IV Deck [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,466    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,466    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,466    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,649    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 4,466    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,649    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 4,466    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,649    
Nashville, TN - Cool Springs I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,583    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 15    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 18,202    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,598    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 18,202    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,800    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,279    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,800    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,279    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,800    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,279    
Nashville, TN - Cool Springs II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,824    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 346    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 23,961    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,170    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 23,961    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,131    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,567    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,131    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,567    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,131    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,567    
Nashville, TN - Cool Springs III [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,631    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 804    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 17,091    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,435    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 17,091    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,526    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,329    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,526    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,329    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,526    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,329    
Nashville, TN - Cool Springs IV [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,715    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 20,234    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,715    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 20,234    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,949    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,701    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 21,949    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,701    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 21,949    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,701    
Nashville, TN - Cool Springs V (Healthways) [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,688    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 295    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 53,116    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,983    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 53,116    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 57,099    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,867    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 57,099    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 24,867    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 57,099    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,867    
Nashville, TN - Harpeth on the Green II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,419    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 5,677    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,164    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,419    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,841    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,260    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,870    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,260    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,870    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,260    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,870    
Nashville, TN - Harpeth on the Green III [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,660    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 6,649    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,621    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,660    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,270    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,930    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,195    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,930    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,195    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,930    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,195    
Nashville, TN - Harpeth on the Green IV [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,713    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 6,842    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,553    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,713    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,395    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,108    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,439    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,108    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,439    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,108    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,439    
Nashville, TN - Harpeth on The Green V [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 662    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 197    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,187    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 859    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,187    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,046    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,007    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,046    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,007    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,046    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,007    
Nashville, TN - Hickory Trace [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,164    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 164    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,335    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,328    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,335    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,663    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,792    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,663    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,792    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,663    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,792    
Nashville, TN - Highwoods Plaza I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,552    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 307    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 9,857    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,859    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,857    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,716    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,431    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,716    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,431    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,716    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,431    
Nashville, TN - Highwoods Plaza II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,448    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 307    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 10,062    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,755    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,062    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,817    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,449    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,817    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,449    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,817    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,449    
Nashville, TN - Seven Springs I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,076    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 592    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 13,612    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,668    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,612    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,280    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,419    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,280    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,419    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,280    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,419    
Nashville, TN - SouthPointe [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,655    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 310    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 9,410    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,965    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,410    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,375    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,582    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,375    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,582    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,375    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,582    
Nashville, TN - Ramparts [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,394    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 12,806    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 10,834    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,394    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 23,640    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,034    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,660    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,034    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,660    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,034    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,660    
Nashville, TN - Westwood South [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,106    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 382    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,337    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,488    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,337    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,825    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,893    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,825    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,893    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,825    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,893    
Nashville, TN - 100 Winners Circle [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,497    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 7,258    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,729    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,497    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,987    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,484    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,293    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,484    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,293    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,484    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,293    
Nashville, TN - The Pinnacle at Symphony Place [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 91,318    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 141,469    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,535    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 148,004    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 148,004    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 42,086    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 148,004    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 42,086    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 148,004    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 42,086    
Nashville, TN - Seven Springs East (LifePoint) [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,525    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 37,587    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 281    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,525    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 37,868    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,393    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,716    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 40,393    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,716    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 40,393    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,716    
Nashville, TN - The Shops at Seven Springs [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 803    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 8,223    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 404    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 803    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,627    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,430    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,855    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,430    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,855    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,430    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,855    
Nashville, TN - Seven Springs West [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,439    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 51,306    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,034    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,439    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 53,340    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 55,779    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,777    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 55,779    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,777    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 55,779    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,777    
Nashville, TN - Seven Springs II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,356    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 30,048    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,033    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,356    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 33,081    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,376    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 35,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,376    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 35,437    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,376    
Nashville, TN - Bridgestone Tower [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 19,223    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 169,582    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 309    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 19,223    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 169,891    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 189,114    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,278    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 189,114    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 21,278    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 189,114    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,278    
Nashville, TN - Virginia Springs II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,821    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 26,448    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 4,821    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 26,448    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,269    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 720    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 31,269    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 720    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 31,269    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 720    
Nashville, TN - MARS Campus [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 7,010    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 87,474    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 99    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 7,010    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 87,573    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 94,583    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,787    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 94,583    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,787    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 94,583    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,787    
Nashville, TN - 5501 Virginia Way [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 25,632    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 274    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 4,534    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,906    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,440    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,760    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 30,440    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,760    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 30,440    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,760    
Nashville, TN - 1100 Broadway - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 29,845    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (200)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 29,645    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 29,645    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 29,645    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 29,645    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Nashville, TN - Asurion [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 33,219    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 230,569    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 33,219    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 230,569    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 263,788    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,089    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 263,788    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,089    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 263,788    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,089    
Nashville, TN - Ovation - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 31,063    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 58,168    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 89,231    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 89,231    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 89,231    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 89,231    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Nashville, TN - Broadway Stem - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 6,218    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 526    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 6,218    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 526    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,744    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,744    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,744    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4    
Nashville, TN - YMCA Site - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 16,121    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 16,121    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,121    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,121    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,121    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Orlando, FL - Capital Plaza Three - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 18    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,012    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,012    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,012    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,012    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
South Florida - The 1800 Eller Drive Building [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 9,851    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,092    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,943    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,943    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,809    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,943    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,809    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,943    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,809    
Orlando - Seaside Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,893    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 29,541    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,311    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,893    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 41,852    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 45,745    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,684    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 45,745    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,684    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 45,745    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,684    
Orlando - Capital Plaza Two [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,346    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 43,394    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,482    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 4,346    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 51,876    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 56,222    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,421    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 56,222    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 12,421    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 56,222    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,421    
Orlando - Capital Plaza One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,482    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 27,321    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,988    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,482    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 36,309    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 39,791    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,932    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 39,791    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,932    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 39,791    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,932    
Orlando - Landmark Center Two [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,743    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 22,031    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 9,656    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 4,743    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 31,687    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,430    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,074    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 36,430    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,074    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 36,430    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,074    
Orlando - Landmark Center One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 6,207    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 22,655    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 10,604    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 6,207    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 33,259    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 39,466    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,449    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 39,466    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,449    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 39,466    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,449    
Orlando - 300 South Orange [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,490    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 56,079    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7,980    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,490    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 64,059    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 67,549    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,732    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 67,549    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 12,732    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 67,549    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,732    
Orlando, FL - Eola Centre [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,785    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 11,160    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 14,473    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,785    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,633    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,418    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 31,418    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,301    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 31,418    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,301    
Pittsburgh, PA - One PPG Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 9,819    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 107,643    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 51,888    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 9,819    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 159,531    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 169,350    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 50,381    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 169,350    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 50,381    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 169,350    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 50,381    
Pittsburgh, PA - Two PPG Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,302    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 10,978    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,103    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,302    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 23,081    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,383    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,258    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 25,383    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,258    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 25,383    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,258    
Pittsburgh, PA - Three PPG Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 501    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 2,923    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,736    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 501    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,659    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,160    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,174    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,160    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,174    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,160    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,174    
Pittsburgh, PA - Four PPG Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 620    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 3,239    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,477    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 620    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,716    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,336    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,204    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,336    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,204    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,336    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,204    
Pittsburgh, PA - Five PPG Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 803    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,924    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,577    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 803    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,501    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,171    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,171    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,304    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,171    
Pittsburgh, PA - Six PPG Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,353    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 25,602    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 17,141    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,353    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 42,743    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 46,096    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,387    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 46,096    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 13,387    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 46,096    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,387    
Pittsburgh, PA - EQT Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 16,457    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 83,812    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 17,574    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 16,457    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 101,386    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 117,843    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 29,851    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 117,843    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 29,851    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 117,843    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 29,851    
Pittsburgh, PA - East Liberty - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,478    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,478    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,478    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 2,478    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 2,478    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Raleigh, NC - 3600 Glenwood Avenue [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 10,994    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,121    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 17,115    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,115    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,386    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,115    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,386    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,115    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,386    
Raleigh, NC - 3737 Glenwood Avenue [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 318    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 17,213    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 318    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 17,213    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,531    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,183    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,531    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,183    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,531    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,183    
Raleigh, NC - 4800 North Park [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,678    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 17,630    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7,396    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,678    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,026    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,704    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,800    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 27,704    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,800    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 27,704    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,800    
Raleigh, NC - 5000 North Park [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,010    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,612    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (49)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,231    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 961    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,843    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,804    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,394    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,804    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,394    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,804    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,394    
Raleigh, NC - 801 Raleigh Corporate Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 828    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 272    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,686    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,100    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,686    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,786    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,135    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,786    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,135    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,786    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,135    
Raleigh, NC - 2500 Blue Ridge Road [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 722    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,606    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,428    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 722    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,034    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,756    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,013    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,756    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,013    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,756    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,013    
Raleigh, NC - 2418 Blue Ridge Road [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 462    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 1,410    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,869    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 462    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,279    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,881    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 4,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,881    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 4,741    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,881    
Raleigh, NC - 2000 CentreGreen [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,529    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (391)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 13,299    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,138    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,299    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,027    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,027    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,437    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,027    
Raleigh, NC - 4000 CentreGreen [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,653    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (389)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,270    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,264    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,270    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,959    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,959    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,534    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,959    
Raleigh, NC - 5000 CentreGreen [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,291    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 34,572    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,963    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,291    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 37,535    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,789    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 38,826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,789    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 38,826    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,789    
Raleigh, NC - 3000 CentreGreen [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,779    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (397)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 14,714    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,382    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 14,714    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,096    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,302    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,096    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,302    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,096    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,302    
Raleigh, NC - 1000 CentreGreen [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,280    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 55    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 13,969    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,335    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,969    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,252    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,252    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,304    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,252    
Raleigh, NC - GlenLake - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 13,003    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (12,382)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 114    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 621    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 114    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 735    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 59    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 735    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 59    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 735    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 59    
Raleigh, NC - GlenLake One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 924    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 1,324    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 23,185    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,248    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 23,185    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,433    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,795    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 25,433    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,795    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 25,433    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,795    
Raleigh, NC - GlenLake Four [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,659    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 493    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 20,527    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,152    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 20,527    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,679    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,671    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 22,679    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,671    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 22,679    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,671    
Raleigh, NC - GlenLake Six [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 941    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (365)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 20,058    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 576    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 20,058    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,634    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,887    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 20,634    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,887    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 20,634    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,887    
Raleigh, NC - 701 Raleigh Corporate Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 540    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 18,440    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,844    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 18,440    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,284    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,149    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 20,284    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,149    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 20,284    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,149    
Raleigh, NC - Highwoods Centre [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 531    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (267)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,028    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 264    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,028    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,292    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,555    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,292    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,555    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,292    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,555    
Raleigh, NC - Inveresk Parcel 2 - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 657    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 38    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 103    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 695    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 103    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 798    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 798    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 16    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 798    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16    
Raleigh, NC - 4201 Lake Boone Trail [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,450    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 6,311    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 916    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,450    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,227    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,677    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,254    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,677    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,254    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,677    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,254    
Raleigh, NC - 4620 Creekstone Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 149    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 107    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,395    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 256    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 3,395    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,651    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,623    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,651    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,623    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,651    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,623    
Raleigh, NC - 4825 Creekstone Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 398    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 293    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 10,670    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 691    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,670    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,361    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,653    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,361    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,653    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,361    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,653    
Raleigh, NC - 751 Corporate Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,665    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 16,939    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (50)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,665    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 16,889    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,554    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,564    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,554    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,564    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,554    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,564    
Raleigh, NC - PNC Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,206    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 70,872    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,206    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 70,872    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 72,078    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 27,086    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 72,078    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 27,086    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 72,078    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 27,086    
Raleigh, NC - 4301 Lake Boone Trail [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 878    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 3,730    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,524    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 878    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,254    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,132    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,220    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,132    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,220    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,132    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,220    
Raleigh, NC - 4207 Lake Boone Trail [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 362    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 1,818    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,448    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 362    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 3,266    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,628    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,299    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,628    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,299    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,628    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,299    
Raleigh, NC - 2301 Rexwoods Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 919    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 2,816    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,633    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 919    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,449    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,368    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,964    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,368    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,964    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,368    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,964    
Raleigh, NC - 4325 Lake Boone Trail [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 586    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,842    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 586    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,842    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,428    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,050    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,428    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,050    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,428    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,050    
Raleigh, NC - 2300 Rexwoods Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 184    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,863    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,485    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,863    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,405    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,405    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,348    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,405    
Raleigh, NC - 4709 Creekstone Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 469    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,038    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 23    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,434    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 492    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,472    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,964    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,415    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,964    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,415    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,964    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,415    
Raleigh, NC - 4700 Six Forks Road [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 666    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 2,665    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,803    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 666    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,468    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,134    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,420    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,134    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,420    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,134    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,420    
Raleigh, NC - 4700 Homewood Court [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,086    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,533    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,870    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,086    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,403    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,489    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,887    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,489    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,887    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,489    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,887    
Raleigh, NC - 4800 Six Forks Road [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 862    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,411    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,338    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 862    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,749    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,611    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,703    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,611    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,703    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,611    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,703    
Raleigh, NC - 4601 Creekstone Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 255    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 217    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,771    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 472    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,771    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,243    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,334    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,243    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,334    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,243    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,334    
Raleigh, NC - Weston - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 22,771    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (19,894)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,877    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,877    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 2,877    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 2,877    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Raleigh, NC - 4625 Creekstone Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 458    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 268    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,016    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 726    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,016    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,742    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,632    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,742    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,632    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,742    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,632    
Raleigh, NC - 11000 Weston Parkway [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,651    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 18,850    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 14,540    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,651    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 33,390    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,041    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,842    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 36,041    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,842    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 36,041    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,842    
Raleigh, NC - GlenLake Five [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,263    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 30,264    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,694    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,263    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 33,958    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,221    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,197    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 36,221    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,197    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 36,221    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,197    
Raleigh, NC - 11800 Weston Parkway [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 13,188    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 18    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 826    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,206    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,032    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,345    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,032    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,345    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,032    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,345    
Raleigh, NC - CentreGreen Cafe [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 41    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 3,509    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (2)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 41    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 3,507    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,548    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 621    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,548    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 621    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,548    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 621    
Raleigh, NC - CentreGreen Fitness Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 27    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 2,322    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (1)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 27    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 2,321    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 411    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 2,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 411    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 2,348    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 411    
Raleigh, NC - One City Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 11,288    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 68,375    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 26,283    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 11,288    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 94,658    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 105,946    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,562    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 105,946    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 24,562    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 105,946    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,562    
Raleigh, NC - Edison - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 5,984    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 2,031    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 8,015    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,015    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,015    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,015    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Raleigh, NC - Charter Square [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 7,267    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 65,881    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,464    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 7,267    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 70,345    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 77,612    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,979    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 77,612    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 11,979    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 77,612    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,979    
Raleigh, NC - Metlife Global Technology Campus [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 21,580    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 149,889    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 41    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 21,580    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 149,930    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 171,510    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,164    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 171,510    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 24,164    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 171,510    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,164    
Raleigh, NC - GlenLake Seven [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,662    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 37,332    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,662    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 37,332    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,624    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 38,994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,624    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 38,994    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,624    
Raleigh, NC - Hargett - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 9,248    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 9,248    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,248    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,248    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,248    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Raleigh, NC - Forum I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 1,278    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 27,809    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,278    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 27,809    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 29,087    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,197    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 29,087    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,197    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 29,087    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,197    
Raleigh, NC - Forum II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 1,327    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 18,088    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,327    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 18,088    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,415    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 758    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,415    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 758    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,415    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 758    
Raleigh, NC - Forum III [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 994    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 23,931    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 994    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 23,931    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 24,925    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,001    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 24,925    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,001    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 24,925    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,001    
Raleigh, NC - Forum IV [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 2,118    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 43,889    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,118    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 43,889    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 46,007    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,590    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 46,007    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,590    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 46,007    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,590    
Raleigh, NC - Forum V [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 1,552    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 26,263    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,552    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 26,263    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,190    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 27,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,190    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 27,815    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,190    
Raleigh, NC - Captrust Tower [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 84,972    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 9,670    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 124,530    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 9,670    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 124,530    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 134,200    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,673    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 134,200    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,673    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 134,200    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,673    
Raleigh, NC - 150 Fayetteville [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 115,731    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 7,677    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 130,049    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 7,677    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 130,049    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 137,726    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,185    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 137,726    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,185    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 137,726    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,185    
Raleigh, NC - Other Property [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 27,260    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 20,868    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (13,177)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 31,819    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 14,083    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 52,687    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 66,770    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 28,878    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 66,770    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 28,878    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 66,770    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 28,878    
Richmond, VA - 4900 Cox Road [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,324    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 5,311    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 15    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,930    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,339    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,241    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,580    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,580    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,815    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,580    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,815    
Richmond, VA - Colonnade Building [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,364    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 6,105    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,479    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,364    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,584    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,948    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,997    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,948    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,997    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,948    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,997    
Richmond, VA - Dominion Place - Pitts Parcel - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,101    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (465)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 636    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 636    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 636    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 636    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Richmond, VA - Markel 4521 [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,581    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 13,299    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 168    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (397)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,749    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,902    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,651    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,641    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,651    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,641    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,651    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,641    
Richmond, VA - Highwoods Commons [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 521    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 458    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,581    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 979    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,581    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,560    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,342    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,560    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,342    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,560    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,342    
Richmond, VA - Highwoods One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,688    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 22    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 14,252    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,710    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 14,252    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,962    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,762    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,962    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,762    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,962    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,762    
Richmond, VA - Highwoods Two [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 786    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 226    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 10,483    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,012    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,483    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,495    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,504    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,495    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,504    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,495    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,504    
Richmond, VA - Highwoods Five [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 783    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 11    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,177    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 794    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,177    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,971    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,130    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,971    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,130    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,971    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,130    
Richmond, VA - Highwoods Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 909    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 187    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,880    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,096    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,880    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,976    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,885    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,976    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,885    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,976    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,885    
Richmond, VA - Innslake Center [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 845    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 125    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7,735    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 970    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,735    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,705    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,566    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,705    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,566    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,705    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,566    
Richmond, VA - Highwoods Centre [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,205    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,825    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,795    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,205    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,620    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,825    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,789    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,825    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,789    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,825    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,789    
Richmond, VA - Markel 4501 [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,300    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 13,259    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 213    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (3,295)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,513    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,964    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,477    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,389    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,477    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,389    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,477    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,389    
Richmond, VA - 4600 Cox Road [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,700    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 17,081    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 169    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (3,432)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,869    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,649    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,518    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,007    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,518    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,007    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,518    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,007    
Richmond, VA - North Park [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,163    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 8,659    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 6    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,436    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,169    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,095    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,264    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,708    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,264    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,708    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,264    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,708    
Richmond, VA - North Shore Commons I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 951    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 137    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,972    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,088    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,972    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,060    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,435    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,060    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,435    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,060    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,435    
Richmond, VA - North Shore Commons II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,067    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (89)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,526    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,978    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,526    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,504    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,036    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,504    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,036    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,504    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,036    
Richmond, VA - North Shore Commons C - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,497    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 55    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 10    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,552    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,562    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 1,562    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 1,562    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1    
Richmond, VA - North Shore Commons D - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,261    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,261    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,261    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 1,261    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 1,261    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Richmond, VA - One Shockoe Plaza [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 356    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 21,632    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 356    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 21,632    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,988    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,239    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 21,988    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 11,239    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 21,988    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,239    
Richmond, VA - Pavilion - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 181    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 46    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (181)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (46)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 0    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Richmond, VA - Lake Brook Commons [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,600    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 8,864    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 21    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,018    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,621    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,882    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,503    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,082    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,503    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,082    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,503    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,082    
Richmond, VA - Sadler & Cox - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,535    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 343    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,878    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,878    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 1,878    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 1,878    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Richmond, VA - Highwoods Three [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,918    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 358    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 12,337    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,276    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,337    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,613    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,797    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,613    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,797    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,613    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,797    
Richmond, VA - Stony Point I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,384    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 11,630    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (267)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,472    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,117    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 16,102    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,219    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,937    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,219    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,937    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,219    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,937    
Richmond, VA - Stony Point II [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,240    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 103    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 13,949    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,343    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 13,949    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,292    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,983    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,292    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,983    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,292    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,983    
Richmond, VA - Stony Point III [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 995    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,166    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 995    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,166    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,161    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,785    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,161    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,785    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,161    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,785    
Richmond, VA - Stony Point IV [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 955    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,955    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 955    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,955    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,910    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,860    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,910    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,860    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,910    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,860    
Richmond, VA - Virginia Mutual [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 6,036    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 15    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,598    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,316    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,634    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,950    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,865    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,950    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,865    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,950    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,865    
Richmond, VA - Innsbrook Centre [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 914    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 8,249    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 896    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 914    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,145    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,059    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,279    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,059    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,279    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,059    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,279    
Richmond, VA - Elks Pass - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,326    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 141    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,467    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,467    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,467    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,467    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Tampa, FL - Meridian Three [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,673    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 16,470    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,510    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,673    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 22,980    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,653    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,097    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 25,653    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,097    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 25,653    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,097    
Tampa, FL - Bayshore Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,276    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 11,817    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,575    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,276    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 15,392    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,668    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,730    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,668    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,730    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,668    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,730    
Tampa, FL - 5525 Gray Street [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 406    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 25,163    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 4,460    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,163    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 29,623    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,273    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 29,623    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,273    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 29,623    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,273    
Tampa, FL - Highwoods Bay Center I [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,565    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (64)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 38,144    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,501    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 38,144    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 41,645    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 41,645    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,054    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 41,645    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,054    
Tampa, FL - Horizon [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 6,257    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,475    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,732    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,732    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,419    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,732    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,419    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,732    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,419    
Tampa, FL - LakePointe One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,106    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 89    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 41,965    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,106    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 42,054    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 44,160    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,503    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 44,160    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 24,503    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 44,160    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,503    
Tampa, FL - LakePointe Two [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,000    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 15,848    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 672    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 15,394    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,672    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 31,242    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 33,914    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,421    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 33,914    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 17,421    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 33,914    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,421    
Tampa, FL - Lakeside [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 7,369    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7,160    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 14,529    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,529    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,722    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,529    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,722    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,529    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,722    
Tampa, FL - Lakeside/Parkside Garage [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,731    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,731    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,731    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,702    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,731    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,702    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,731    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,702    
Tampa, FL - One Harbour Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,016    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 25,252    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 16,815    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,016    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 42,067    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 44,083    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,922    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 44,083    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 19,922    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 44,083    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,922    
Tampa, FL - Parkside [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 9,407    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,417    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,824    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,824    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,566    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,824    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,566    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,824    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,566    
Tampa, FL - Pavilion [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 16,394    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,793    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 22,187    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,187    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,108    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 22,187    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 13,108    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 22,187    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,108    
Tampa, FL - Pavilion Parking Garage [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,911    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,911    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,911    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,192    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,911    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,192    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,911    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,192    
Tampa, FL - Spectrum [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,454    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 14,502    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,112    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,454    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 19,614    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,068    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,788    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 21,068    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,788    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 21,068    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,788    
Tampa, FL - Tower Place [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 3,218    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 19,898    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 8,630    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,218    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 28,528    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,746    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,728    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 31,746    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,728    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 31,746    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,728    
Tampa, FL - Westshore Square [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,126    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 5,186    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,738    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,126    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,924    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,050    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,925    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,050    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,925    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,050    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,925    
Tampa, FL - Independence Park - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 4,943    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 5,058    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,227    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 10,001    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 2,227    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,228    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 269    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,228    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 269    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,228    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 269    
Tampa, FL - Independence One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,531    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,526    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,813    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,531    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,339    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,870    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,718    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,870    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,718    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,870    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,718    
Tampa, FL - Meridian One [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,849    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 22,363    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,314    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,849    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,677    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,526    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,611    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 27,526    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,611    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 27,526    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,611    
Tampa, FL - Meridian Two [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,302    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 19,588    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,470    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,302    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,058    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,360    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,360    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,826    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,360    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,826    
Tampa, FL - 5332 Avion Drive [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 6,310    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 39,620    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 6,310    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 39,620    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 45,930    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,378    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 45,930    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,378    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 45,930    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,378    
Tampa, FL - Suntrust Financial Centre [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 1,980    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 102,138    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 25,702    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,980    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 127,840    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 129,820    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,605    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 129,820    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 24,605    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 129,820    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,605    
Tampa, FL - Suntrust Financial - Land [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 2,225    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,225    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,225    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 2,225    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 2,225    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0    
Tampa, FL - Midtown [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 16,543    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 34,818    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 16,543    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 34,818    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 51,361    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 533    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 51,361    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 533    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 51,361    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 533    
Total Real Estate and Accumulated Depreciation [Member]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land 602,096    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 3,235,692    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land 165,871    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,482,477    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 767,967    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,718,169    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,486,136    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,457,511    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,486,136    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,457,511    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,486,136    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation $ 1,457,511    
Minimum [Member] | Atlanta, GA - 1700 Century Circle [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 1800 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 1825 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 1875 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 1900 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2200 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2400 Century Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2500 Century Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2500/2635 Parking Garage [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2600 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2635 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 2800 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Century Plaza I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Century Plaza II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Riverpoint - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Riverwood 100 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Two Alliance Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - One Alliance Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 10 Glenlake North [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - 10 Glenlake South [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Riverwood 200 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Riverwood 300 - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Monarch Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Atlanta, GA - Monarch Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Charlotte, NC - Bank of America Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Charlotte, NC - Morrocroft [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Charlotte, NC - Capitol Towers [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - 3322 West End [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - 3401 West End [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - 5310 Maryland Way [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs I & II Deck [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs III & IV Deck [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Cool Springs V (Healthways) [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Harpeth on the Green II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Harpeth on the Green III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Harpeth on the Green IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Harpeth on The Green V [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Hickory Trace [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Highwoods Plaza I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Highwoods Plaza II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Seven Springs I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - SouthPointe [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Ramparts [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Westwood South [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - 100 Winners Circle [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - The Pinnacle at Symphony Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Seven Springs East (LifePoint) [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - The Shops at Seven Springs [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Seven Springs West [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Seven Springs II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Bridgestone Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Virginia Springs II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - MARS Campus [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - 5501 Virginia Way [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Asurion [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Nashville, TN - Broadway Stem - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | South Florida - The 1800 Eller Drive Building [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando - Seaside Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando - Capital Plaza Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando - Capital Plaza One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando - Landmark Center Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando - Landmark Center One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando - 300 South Orange [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Orlando, FL - Eola Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - One PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - Two PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - Three PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - Four PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - Five PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - Six PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Pittsburgh, PA - EQT Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 3600 Glenwood Avenue [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 3737 Glenwood Avenue [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4800 North Park [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 5000 North Park [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 801 Raleigh Corporate Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 2500 Blue Ridge Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 2418 Blue Ridge Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 2000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 5000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 3000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 1000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - GlenLake - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - GlenLake One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - GlenLake Four [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - GlenLake Six [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 701 Raleigh Corporate Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Highwoods Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Inveresk Parcel 2 - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4201 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4620 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4825 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 751 Corporate Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - PNC Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4301 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4207 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 2301 Rexwoods Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4325 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 2300 Rexwoods Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4709 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4700 Six Forks Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4700 Homewood Court [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4800 Six Forks Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4601 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 4625 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 11000 Weston Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - GlenLake Five [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 11800 Weston Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - CentreGreen Cafe [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - CentreGreen Fitness Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - One City Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Charter Square [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Metlife Global Technology Campus [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - GlenLake Seven [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Forum I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Forum II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Forum III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Forum IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Forum V [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Captrust Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - 150 Fayetteville [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Raleigh, NC - Other Property [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - 4900 Cox Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Colonnade Building [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Markel 4521 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods Commons [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods Five [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Innslake Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Markel 4501 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - 4600 Cox Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - North Park [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - North Shore Commons I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - North Shore Commons II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - One Shockoe Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Lake Brook Commons [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Highwoods Three [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Stony Point I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Stony Point II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Stony Point III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Stony Point IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Virginia Mutual [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Richmond, VA - Innsbrook Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Meridian Three [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Bayshore Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - 5525 Gray Street [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Highwoods Bay Center I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Horizon [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - LakePointe One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - LakePointe Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Lakeside [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Lakeside/Parkside Garage [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - One Harbour Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Parkside [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Pavilion [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Pavilion Parking Garage [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Spectrum [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Tower Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Westshore Square [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Independence Park - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Independence One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Meridian One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Meridian Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - 5332 Avion Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Suntrust Financial Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Minimum [Member] | Tampa, FL - Midtown [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years    
Maximum [Member] | Atlanta, GA - 1700 Century Circle [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 1800 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 1825 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 1875 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 1900 Century Boulevard [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2200 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2400 Century Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2500 Century Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2500/2635 Parking Garage [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2600 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2635 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 2800 Century Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Century Plaza I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Century Plaza II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Riverpoint - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Riverwood 100 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Two Alliance Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - One Alliance Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 10 Glenlake North [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - 10 Glenlake South [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Riverwood 200 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Riverwood 300 - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Monarch Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Atlanta, GA - Monarch Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Charlotte, NC - Bank of America Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Charlotte, NC - Morrocroft [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Charlotte, NC - Capitol Towers [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - 3322 West End [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - 3401 West End [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - 5310 Maryland Way [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs I & II Deck [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs III & IV Deck [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Cool Springs V (Healthways) [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Harpeth on the Green II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Harpeth on the Green III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Harpeth on the Green IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Harpeth on The Green V [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Hickory Trace [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Highwoods Plaza I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Highwoods Plaza II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Seven Springs I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - SouthPointe [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Ramparts [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Westwood South [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - 100 Winners Circle [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - The Pinnacle at Symphony Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Seven Springs East (LifePoint) [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - The Shops at Seven Springs [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Seven Springs West [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Seven Springs II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Bridgestone Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Virginia Springs II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - MARS Campus [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - 5501 Virginia Way [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Asurion [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Nashville, TN - Broadway Stem - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | South Florida - The 1800 Eller Drive Building [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando - Seaside Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando - Capital Plaza Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando - Capital Plaza One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando - Landmark Center Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando - Landmark Center One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando - 300 South Orange [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Orlando, FL - Eola Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - One PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - Two PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - Three PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - Four PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - Five PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - Six PPG Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Pittsburgh, PA - EQT Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 3600 Glenwood Avenue [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 3737 Glenwood Avenue [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4800 North Park [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 5000 North Park [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 801 Raleigh Corporate Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 2500 Blue Ridge Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 2418 Blue Ridge Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 2000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 5000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 3000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 1000 CentreGreen [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - GlenLake - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - GlenLake One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - GlenLake Four [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - GlenLake Six [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 701 Raleigh Corporate Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Highwoods Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Inveresk Parcel 2 - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4201 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4620 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4825 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 751 Corporate Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - PNC Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4301 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4207 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 2301 Rexwoods Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4325 Lake Boone Trail [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 2300 Rexwoods Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4709 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4700 Six Forks Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4700 Homewood Court [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4800 Six Forks Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4601 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 4625 Creekstone Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 11000 Weston Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - GlenLake Five [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 11800 Weston Parkway [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - CentreGreen Cafe [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - CentreGreen Fitness Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - One City Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Charter Square [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Metlife Global Technology Campus [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - GlenLake Seven [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Forum I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Forum II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Forum III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Forum IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Forum V [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Captrust Tower [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - 150 Fayetteville [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Raleigh, NC - Other Property [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - 4900 Cox Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Colonnade Building [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Markel 4521 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods Commons [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods Five [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Innslake Center [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Markel 4501 [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - 4600 Cox Road [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - North Park [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - North Shore Commons I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - North Shore Commons II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - One Shockoe Plaza [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Lake Brook Commons [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Highwoods Three [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Stony Point I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Stony Point II [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Stony Point III [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Stony Point IV [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Virginia Mutual [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Richmond, VA - Innsbrook Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Meridian Three [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Bayshore Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - 5525 Gray Street [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Highwoods Bay Center I [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Horizon [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - LakePointe One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - LakePointe Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Lakeside [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Lakeside/Parkside Garage [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - One Harbour Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Parkside [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Pavilion [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Pavilion Parking Garage [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Spectrum [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Tower Place [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Westshore Square [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Independence Park - Land [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Independence One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Meridian One [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Meridian Two [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - 5332 Avion Drive [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Suntrust Financial Centre [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years    
Maximum [Member] | Tampa, FL - Midtown [Member]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years