Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Acquisition Information (Details)

v3.8.0.1
Real Estate - Acquisition Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Business Acquisition [Line Items]    
Payments to acquire real estate $ 106,400 $ 0
Repayments of Secured Debt 136,309 50,346
Arlington Tower [Member]    
Business Acquisition [Line Items]    
Asset acquisition, transaction costs capitalized 600  
Contract purchase price 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 83 months  
Arlington Tower [Member] | Leasing Commissions Absorption Costs Member    
Business Acquisition [Line Items]    
Weighted Average useful life of acquisition components 72 months  
Arlington Tower [Member] | Net Lease Intangible Assets [Member]    
Business Acquisition [Line Items]    
Weighted Average useful life of acquisition components 75 months  
Arlington Tower [Member] | Net Lease Intangible Liability [Member]    
Business Acquisition [Line Items]    
Weighted Average useful life of acquisition components 88 months