Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Acquisition Information (Details)

v3.10.0.1
Real Estate - Acquisition Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Business Acquisition [Line Items]      
Payments to acquire real estate   $ 106,400 $ 138,371
Repayments of Secured Debt   169,480 51,815
Arlington Tower [Member]      
Business Acquisition [Line Items]      
Asset acquisition, transaction costs capitalized $ 600    
Contract purchase price $ 250,000 250,000  
Repayments of Secured Debt   135,500  
Payments for deposits on real estate acquisitions     $ 6,300
Other payments to acquire businesses   $ 1,800  
Arlington Tower [Member] | Tenant Origination Costs [Member]      
Business Acquisition [Line Items]      
Weighted average useful life of acquisition components   74 months  
Arlington Tower [Member] | Leasing Commissions Absorption Costs [Member]      
Business Acquisition [Line Items]      
Weighted average useful life of acquisition components   64 months  
Arlington Tower [Member] | Net Lease Intangible Assets [Member]      
Business Acquisition [Line Items]      
Weighted average useful life of acquisition components   66 months  
Arlington Tower [Member] | Net Lease Intangible Liability [Member]      
Business Acquisition [Line Items]      
Weighted average useful life of acquisition components   81 months