XML 39 R29.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies - Narrative (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
USD ($)
tenant
Property
store
shares
Mar. 31, 2018
USD ($)
tenant
Property
store
shares
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Significant Accounting Policies [Line Items]        
Number of tenants | tenant 1 1    
Number of shopping centers | store 32 32    
Percentage of ownership in operating partnership   74.40%    
Allowance for doubtful accounts receivables $ 500 $ 500   $ 400
Accounts receivable, net representing rental income accrued 44,000 $ 44,000   44,100
Period expected for the sale of property to occur   1 year    
Deferred debt costs 9,015 $ 9,015   6,900
Accumulated amortization, deferred debt costs 6,800 6,800   8,200
Deferred leasing costs, net 26,838 26,838   27,255
Accumulated amortization deferred leasing cost $ 34,000 34,000   35,300
Amortization expense deferred leasing cost   1,400 $ 1,300  
Interest capitalized   $ 1,144 769  
Commercial development projects, availability for occupancy, maximum period after major construction activity   1 year    
Depreciation expense   $ 9,900 10,000  
Repairs and maintenance expense   $ 3,100 $ 2,700  
Shares credited to directors' deferred fee accounts (in shares) | shares 179,732 2,202    
Shares due to exercise of employee stock options and issuance of directors' deferred stock (in shares) | shares   8,088    
Held-for-sale        
Significant Accounting Policies [Line Items]        
Number of real estate properties | Property 0 0    
Minimum        
Significant Accounting Policies [Line Items]        
Allowance for doubtful accounts receivables representing rental income accrued $ 100 $ 100   $ 200
Minimum | Building        
Significant Accounting Policies [Line Items]        
Estimated useful life (in years)   35 years    
Maximum | Building        
Significant Accounting Policies [Line Items]        
Estimated useful life (in years)   50 years    
Maximum | Building Improvements        
Significant Accounting Policies [Line Items]        
Estimated useful life (in years)   20 years    
Giant Food        
Significant Accounting Policies [Line Items]        
Percentage of total revenue   4.80%    
Number of shopping centers | store   10    
Capital One        
Significant Accounting Policies [Line Items]        
Percentage of total revenue   2.70%    
Number of shopping centers | store   18    
Revenues        
Significant Accounting Policies [Line Items]        
Number of tenants | tenant 2 2    
Percentage of total revenue   2.50%    
Glebe Road Construction Loan        
Significant Accounting Policies [Line Items]        
Deferred debt costs $ 1,800 $ 1,800    
Common Stock        
Significant Accounting Policies [Line Items]        
Shares due to exercise of employee stock options and issuance of directors' deferred stock (in shares) | shares   4,086