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Schedule III (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
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 $ 6,689,692 $ 6,486,136 $ 5,594,833
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,609,502 1,457,511 1,421,956
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Federal Income Tax Basis 6,400,000    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, beginning balance 6,486,136 5,594,833 5,776,804
Acquisitions, development and improvements 378,587 1,248,256 259,470
Cost of real estate sold and retired (175,031) (356,953) (441,441)
Real estate assets, ending balance 6,689,692 6,486,136 5,594,833
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, beginning balance 1,457,511 1,421,956 1,405,341
Depreciation expense 240,273 218,628 204,585
Real estate sold and retired (88,282) (183,073) (187,970)
Accumulated depreciation, ending balance 1,609,502 1,457,511 1,421,956
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,689,692 6,486,136 5,594,833
Development in process exclusive of land included in Schedule III 46,735 6,890 259,681
Real estate assets, net, held for sale 0 (3,482) (14,850)
Total real estate assets 6,736,427 6,489,544 5,839,664
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,609,502 1,457,511 1,421,956
Real estate assets, net, held for sale 0 0 (3,577)
Total accumulated depreciation 1,609,502 $ 1,457,511 $ 1,418,379
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 1,340    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 3,822    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,824    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,225    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,824    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,225    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,824    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,225    
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 6,381    
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 35,462    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,906    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,368    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 36,906    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 21,368    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 36,906    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,368    
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 15,209    
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 15,209    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,376    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,687    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,376    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,687    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,376    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,687    
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 8,854    
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 17,778    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,778    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,331    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,778    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,331    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,778    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,331    
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 9,374    
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 23,806    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 23,806    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,405    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 23,806    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 13,405    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 23,806    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,405    
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 14,802    
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 14,802    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,208    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,843    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,208    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,843    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,208    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,843    
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 12,892    
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 12,892    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,220    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,204    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,220    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,204    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,220    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,204    
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 2,764    
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 2,764    
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 2,764    
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 5,327    
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 16,006    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,006    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,888    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,006    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,888    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,006    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,888    
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 21,120    
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 42,763    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 42,763    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 22,453    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 42,763    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 22,453    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 42,763    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 22,453    
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 11,856    
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 32,305    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,305    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,210    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 32,305    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 20,210    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 32,305    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,210    
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 4,772    
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 13,339    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,629    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,493    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,629    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,493    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,629    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,493    
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 4,666    
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 12,399    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,779    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,079    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,779    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,079    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,779    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,079    
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 28,871    
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 93,784    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 99,540    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 30,150    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 99,540    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 30,150    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 99,540    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 30,150    
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 22    
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 125,571    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 135,150    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 36,973    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 135,150    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 36,973    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 135,150    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 36,973    
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 23,163    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 14,775    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 146,234    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 161,009    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 40,075    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 161,009    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 40,075    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 161,009    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 40,075    
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 8,110    
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 34,444    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 39,793    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,844    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 39,793    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,844    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 39,793    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,844    
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 9,336    
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 32,147    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 37,250    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,177    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 37,250    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,177    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 37,250    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,177    
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 2,691    
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 92,399    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 97,626    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,208    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 97,626    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 17,208    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 97,626    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,208    
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 105    
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 105    
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 105    
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 22,143    
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 165,211    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 187,928    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 36,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 187,928    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 36,534    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 187,928    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 36,534    
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 14,823    
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 103,785    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 131,463    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 22,507    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 131,463    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 22,507    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 131,463    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 22,507    
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 19,740    
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 (906)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 220    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 18,834    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 220    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 15    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,054    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15    
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 22,746    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 29,273    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 377,495    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 406,768    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 35,392    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 406,768    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 35,392    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 406,768    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 35,392    
Charlotte, NC - Morrocroft [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 69,473    
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 19,286    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 177,199    
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 5,569    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 19,286    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 182,768    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 202,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,120    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 202,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,120    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 202,054    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,120    
Charlotte, NC - Capitol Towers [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 127,540    
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 9,202    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 102,179    
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 107    
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 102,286    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 111,488    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,511    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 111,488    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,511    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 111,488    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,511    
Charlotte, NC - 1426 S. Tryon - 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 26,702    
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 26,702    
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 26,702    
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 26,702    
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 26,702    
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 - SIX50 at Legacy Union [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 16,504    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 166,305    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 16,504    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 166,305    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 182,809    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,104    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 182,809    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,104    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 182,809    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,104    
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 12,663    
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 40,153    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 43,178    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,598    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 43,178    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 21,598    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 43,178    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,598    
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 7,484    
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 30,401    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,263    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,944    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 36,263    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 17,944    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 36,263    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,944    
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 3,818    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,863    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 11,019    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,882    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,882    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,444    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,882    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,444    
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 1,516    
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 1,516    
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 1,516    
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 4,467    
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 4,467    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,467    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,762    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 4,467    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,762    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 4,467    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,762    
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 18,764    
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 18,764    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,362    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,375    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 20,362    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,375    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 20,362    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,375    
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 24,083    
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 24,083    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,253    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,764    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,253    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,764    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,253    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,764    
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 22,191    
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 22,191    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 24,626    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,172    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 24,626    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,172    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 24,626    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,172    
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 20,532    
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 20,532    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,247    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,492    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 22,247    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,492    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 22,247    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,492    
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 53,285    
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 53,285    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 57,268    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,690    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 57,268    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 26,690    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 57,268    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,690    
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 9,034    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,419    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 14,711    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,130    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,975    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,130    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,975    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,130    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,975    
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 7,876    
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 14,525    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,185    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,788    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,185    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,788    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,185    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,788    
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 8,710    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,713    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 15,552    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,265    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,076    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,265    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,076    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,265    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,076    
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 8,579    
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 8,579    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,438    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,459    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,438    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,459    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,438    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,459    
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 6,413    
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 6,413    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,101    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,101    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,741    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,101    
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 9,469    
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 9,469    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,328    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,434    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,328    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,434    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,328    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,434    
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 7,659    
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 7,659    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,414    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,102    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,414    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,102    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,414    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,102    
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 14,008    
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 14,008    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,676    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,847    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,676    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,847    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,676    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,847    
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 9,403    
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 9,403    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,368    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,047    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,368    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,047    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,368    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,047    
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 11,543    
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 24,349    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,743    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,899    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,743    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,899    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,743    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,899    
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 11,222    
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 11,222    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,710    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,487    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,710    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,487    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,710    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,487    
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 5,753    
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 13,011    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,508    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,668    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,508    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,668    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,508    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,668    
Nashville, TN - The Pinnacle at Symphony Place [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 89,204    
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 5,923    
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 147,392    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 147,392    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 45,993    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 147,392    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 45,993    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 147,392    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 45,993    
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 507    
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 38,094    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,619    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,926    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 40,619    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,926    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 40,619    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,926    
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 613    
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 8,836    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,639    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,257    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,639    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,257    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,639    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,257    
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 1,187    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,439    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 52,493    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 54,932    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,007    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 54,932    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,007    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 54,932    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,007    
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 3,103    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,356    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 33,151    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,507    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,418    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 35,507    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,418    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 35,507    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,418    
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 380    
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 169,962    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 189,185    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,196    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 189,185    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 26,196    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 189,185    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,196    
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 3,973    
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 30,421    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,242    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,914    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 35,242    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,914    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 35,242    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,914    
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 136    
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 87,610    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 94,620    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,072    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 94,620    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 12,072    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 94,620    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,072    
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 308    
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 25,940    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,474    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,745    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 30,474    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,745    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 30,474    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,745    
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 33,219    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 230,569    
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 2,253    
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 232,822    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 266,041    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,601    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 266,041    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,601    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 266,041    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,601    
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 89,231    
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 162    
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 89,393    
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 89,393    
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 89,393    
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 89,393    
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 18    
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 18    
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 18    
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 16,121    
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 48    
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 16,169    
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 16,169    
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 16,169    
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 16,169    
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 2,565    
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 12,416    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,416    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,430    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,416    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,430    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,416    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,430    
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 14,028    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,893    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 43,569    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 47,462    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 47,462    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 12,534    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 47,462    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,534    
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 11,555    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 4,346    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 54,949    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 59,295    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,688    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 59,295    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 13,688    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 59,295    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,688    
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 9,724    
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 37,045    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,527    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,249    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 40,527    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,249    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 40,527    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,249    
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 10,368    
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 32,399    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 37,142    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,100    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 37,142    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,100    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 37,142    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,100    
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 11,953    
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 34,608    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,272    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 40,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,272    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 40,815    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,272    
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 9,601    
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 65,680    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 69,170    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,390    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 69,170    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,390    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 69,170    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,390    
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 15,510    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,785    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 26,670    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,455    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,463    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 32,455    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,463    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 32,455    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,463    
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 51,618    
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 159,261    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 169,080    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 55,295    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 169,080    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 55,295    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 169,080    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 55,295    
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 12,456    
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 23,434    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,736    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,358    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 25,736    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,358    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 25,736    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,358    
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 4,536    
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 7,459    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,960    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,254    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,960    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,254    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,960    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,254    
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 3,383    
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 6,622    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,242    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,438    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,242    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,438    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,242    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,438    
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 2,678    
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 7,602    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,405    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,490    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,405    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,490    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,405    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,490    
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 15,552    
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 41,154    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 44,507    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,894    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 44,507    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 13,894    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 44,507    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,894    
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 (6,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (7,121)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 10,457    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 76,691    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 87,148    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 33,713    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 87,148    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 33,713    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 87,148    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 33,713    
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 (813)    
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 1,665    
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 1,665    
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 1,665    
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 1,665    
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 6,160    
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 17,154    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,154    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,184    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,154    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,184    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,154    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,184    
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 17,738    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 318    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 17,738    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 18,056    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,607    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 18,056    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,607    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 18,056    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,607    
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 7,685    
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 25,315    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,993    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,048    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 27,993    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 16,048    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 27,993    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,048    
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 3,792    
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 8,404    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,365    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,717    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,365    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,717    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,365    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,717    
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 11,975    
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 11,975    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,075    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,710    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,075    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,710    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,075    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,710    
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 1,417    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 722    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,023    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,745    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,187    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,745    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,187    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,745    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,187    
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 2,895    
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 4,305    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,767    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,113    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 4,767    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,113    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 4,767    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,113    
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 14,318    
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 14,318    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,456    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,835    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,456    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,835    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,456    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,835    
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 12,171    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,264    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 12,171    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,435    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,310    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,435    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,310    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,435    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,310    
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 2,481    
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 37,053    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,344    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,208    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 38,344    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,208    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 38,344    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,208    
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 14,784    
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 14,784    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,166    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,746    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 16,166    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,746    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 16,166    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,746    
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 13,992    
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 13,992    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,327    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,990    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,327    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,990    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,327    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,990    
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 62    
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 62    
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 62    
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 24,166    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,248    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 24,166    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,414    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,700    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,414    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 11,700    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,414    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,700    
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 20,705    
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 20,705    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,857    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,420    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 22,857    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,420    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 22,857    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,420    
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 20,453    
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 20,453    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,029    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,374    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 21,029    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,374    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 21,029    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,374    
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 18,946    
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 18,946    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,790    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,389    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 20,790    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,389    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 20,790    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,389    
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 8,062    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 264    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 8,062    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,326    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,788    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,326    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,788    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,326    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,788    
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 19    
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 19    
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 19    
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 1,015    
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 7,326    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,776    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,460    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,776    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,460    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,776    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,460    
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 5,927    
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 5,927    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,183    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,851    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,183    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,851    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,183    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,851    
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 10,819    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 691    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,819    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,510    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,906    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,510    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,906    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,510    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,906    
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 3,400    
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 3,400    
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 3,400    
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 71,091    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,206    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 71,091    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 72,297    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 29,568    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 72,297    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 29,568    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 72,297    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 29,568    
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 2,432    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 878    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 6,162    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,040    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,355    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,040    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,355    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,040    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,355    
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 1,409    
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 3,227    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,589    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,440    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,589    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,440    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,589    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,440    
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 1,486    
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 4,302    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,221    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,997    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,221    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,997    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,221    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,997    
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 4,696    
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 4,696    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,282    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,220    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,282    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,220    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,282    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,220    
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 10,418    
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 10,418    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,903    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,084    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,903    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,084    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,903    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,084    
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 5,722    
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 9,760    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,252    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,752    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,252    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,752    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,252    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,752    
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 1,741    
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 4,406    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,072    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,558    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,072    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,558    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,072    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,558    
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 1,655    
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 6,188    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,274    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,915    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,274    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,915    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,274    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,915    
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 2,725    
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 7,136    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,998    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,998    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,534    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,998    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,534    
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 5,686    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 472    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,686    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,158    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,257    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,158    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,257    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,158    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,257    
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 (19,528)    
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 3,243    
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 3,243    
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 3,243    
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 3,243    
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 6,647    
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 6,647    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,373    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,831    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,373    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,831    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,373    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,831    
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 16,628    
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 35,478    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,129    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,954    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 38,129    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,954    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 38,129    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,954    
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 1,424    
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 31,688    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 33,951    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,365    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 33,951    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,365    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 33,951    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,365    
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 45    
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 13,233    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,059    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,855    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,059    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,855    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,059    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,855    
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 15    
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 3,524    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,565    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 709    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 3,565    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 709    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 3,565    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 709    
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 469    
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 469    
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 469    
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 26,944    
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 95,319    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 106,607    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 28,566    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 106,607    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 28,566    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 106,607    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 28,566    
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 1,834    
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 7,818    
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 7,818    
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 7,818    
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 7,818    
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 4,140    
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 70,021    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 77,288    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,023    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 77,288    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,023    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 77,288    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,023    
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 264    
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 150,153    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 171,733    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 28,859    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 171,733    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 28,859    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 171,733    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 28,859    
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 2,886    
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 2,886    
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 2,886    
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 (212)    
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 9,036    
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 9,036    
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 9,036    
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 9,036    
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 1,278    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 27,809    
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 1,535    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,278    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 29,344    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,622    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,335    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 30,622    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,335    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 30,622    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,335    
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 1,327    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 18,088    
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 326    
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 18,414    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,636    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 19,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,636    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 19,741    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,636    
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 994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 23,931    
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 1,394    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 994    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 25,325    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,319    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,199    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,319    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,199    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,319    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,199    
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 2,118    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 43,889    
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 271    
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 44,160    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 46,278    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,273    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 46,278    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,273    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 46,278    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,273    
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 1,552    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 26,263    
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 1,146    
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 27,409    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 28,961    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,489    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 28,961    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,489    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 28,961    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,489    
Raleigh, NC - Captrust Tower [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 84,666    
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 9,670    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 124,530    
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 2,432    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 9,670    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 126,962    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 136,632    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,466    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 136,632    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,466    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 136,632    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,466    
Raleigh, NC - 150 Fayetteville [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Real Estate and Accumulated Depreciation, Encumbrances 113,105    
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 7,677    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 130,049    
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 12,153    
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 142,202    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 149,879    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,118    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 149,879    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,118    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 149,879    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,118    
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 (21,846)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,166    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 5,414    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 24,034    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 29,448    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,379    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 29,448    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 10,379    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 29,448    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,379    
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 3,537    
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 8,848    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,187    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,764    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,187    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,764    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,187    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,764    
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 3,139    
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 9,244    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,608    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,237    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,608    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,237    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,608    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,237    
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 (378)    
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 12,921    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,670    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,029    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,670    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,029    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,670    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,029    
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 4,930    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 979    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 4,930    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,909    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,323    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 5,909    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,323    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 5,909    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,323    
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 14,053    
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 14,053    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,763    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,981    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,763    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,981    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,763    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,981    
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 10,840    
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 10,840    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,852    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,106    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,852    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,106    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,852    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,106    
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 8,210    
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 8,210    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,004    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,520    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,004    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,520    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,004    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,520    
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 6,123    
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 6,123    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,219    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,046    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 7,219    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,046    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 7,219    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,046    
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 7,725    
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 7,725    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,695    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,927    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,695    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,927    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,695    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,927    
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 2,711    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,205    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 7,536    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,045    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,741    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,045    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,741    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,045    
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 (3,435)    
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 9,824    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,337    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,497    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 11,337    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,497    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 11,337    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,497    
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 (3,208)    
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 13,873    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,742    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,742    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,444    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,742    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,444    
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 3,315    
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 11,974    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,143    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,966    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,143    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,966    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,143    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,966    
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 14,727    
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 14,727    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,758    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,815    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,758    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,815    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,758    
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 11,742    
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 11,742    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,720    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,526    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,720    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,526    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,720    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,526    
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 2    
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 2    
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 2    
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 22,319    
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 22,319    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,675    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,122    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 22,675    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 12,122    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 22,675    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,122    
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 (179)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 334    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,421    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,198    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,619    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,848    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,619    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 3,848    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,619    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,848    
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 12,542    
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 12,542    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,818    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,254    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 14,818    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,254    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 14,818    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,254    
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 4,808    
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 16,438    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,555    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,230    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 17,555    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 9,230    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 17,555    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,230    
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 13,952    
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 13,952    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,295    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,215    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 15,295    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,215    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 15,295    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,215    
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 11,375    
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 11,375    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,370    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,139    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,370    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,139    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,370    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,139    
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 12,794    
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 12,794    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,749    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,367    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 13,749    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,367    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 13,749    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,367    
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 3,448    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 1,316    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 9,484    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,800    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,281    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,800    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,281    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,800    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,281    
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 999    
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 9,248    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,162    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,470    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,162    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,470    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,162    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,470    
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 6,677    
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 23,147    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,820    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,912    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 25,820    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,912    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 25,820    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,912    
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 3,915    
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 15,732    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 18,008    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,265    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 18,008    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 8,265    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 18,008    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,265    
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 38,113    
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 38,113    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 41,614    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,460    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 41,614    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 15,460    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 41,614    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,460    
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 4,410    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 10,667    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,667    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,453    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 10,667    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 5,453    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 10,667    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,453    
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 41,363    
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 41,452    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 43,558    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,877    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 43,558    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 24,877    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 43,558    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,877    
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 13,141    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 2,672    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 28,989    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,661    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 31,661    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 16,304    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 31,661    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,304    
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 8,478    
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 8,478    
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 8,478    
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 2,950    
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 2,950    
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 2,950    
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 17,019    
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 42,271    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 44,287    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,481    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 44,287    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 21,481    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 44,287    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 21,481    
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 3,513    
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 12,920    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,920    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,041    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 12,920    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,041    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 12,920    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,041    
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 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 22,929    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,929    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,016    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 22,929    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 14,016    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 22,929    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,016    
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 3,353    
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 3,353    
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 3,353    
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 5,946    
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 20,448    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,902    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,480    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 21,902    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 11,480    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 21,902    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,480    
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 9,888    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 3,218    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 29,786    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 33,004    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,879    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 33,004    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 15,879    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 33,004    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,879    
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 1,765    
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 6,951    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,077    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,103    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 8,077    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 4,103    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 8,077    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,103    
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 2,669    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,693    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 7,612    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 1,693    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,305    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 247    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,305    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 247    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,305    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 247    
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 2,407    
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 6,933    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,464    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,349    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 9,464    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 2,349    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 9,464    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,349    
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 4,120    
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 26,483    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 28,332    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,641    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 28,332    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,641    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 28,332    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,641    
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 5,843    
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 25,431    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,733    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,947    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 26,733    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 7,947    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 26,733    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,947    
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 43,562    
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 43,562    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 49,872    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,874    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 49,872    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 6,874    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 49,872    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,874    
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 28,429    
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 130,567    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 132,547    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 29,249    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 132,547    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 29,249    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 132,547    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 29,249    
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 16,543    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 34,818    
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 7,312    
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 42,130    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 58,673    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 58,673    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,826    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 58,673    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,826    
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 781,999    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements 4,175,016    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]      
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land (2,061)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,734,738    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]      
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land 779,938    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements 5,909,754    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,689,692    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,609,502    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Real estate assets, ending balance 6,689,692    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, ending balance 1,609,502    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]      
Total real estate assets per Schedule III 6,689,692    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation $ 1,609,502    
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 - 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] | Charlotte, NC - 1426 S. Tryon - 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] | Charlotte, NC - SIX50 at Legacy Union [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 - 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 - 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] | Charlotte, NC - 1426 S. Tryon - 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] | Charlotte, NC - SIX50 at Legacy Union [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 - 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