Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Narrative) (Details)

v3.8.0.1
Significant Accounting Policies (Narrative) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Apr. 13, 2018
Jan. 03, 2018
Significant Accounting Policies [Line Items]          
Capitalized development and construction salaries and other related costs $ 600,000   $ 600,000    
Maximum period after cessation of major construction activity that projects are considered complete 1 year        
Threshold of investment value for discontinuation of equity method accounting $ 0        
Amortization of deferred financing costs 1,096,000   1,103,000    
Loss from extinguishment of debt, net (10,289,000)   (239,000)    
Write off of unamortized deferred financing costs 105,000   0    
Deferred leasing costs 693,000   1,042,000    
Deferred tax asset 9,700,000        
Income taxes, material adjustment amount $ 0        
Common stock, shares outstanding 90,136,278 89,914,113     89,914,658
Common units outstanding 10,214,140 10,438,855     10,438,855
LTIP units outstanding 1,200,836 1,230,877     1,230,877
Distributions payable, record date Apr. 03, 2018 Jan. 03, 2018      
Distributions payable, approved date Mar. 14, 2018 Dec. 12, 2017      
Common stock dividends and common unit distributions per share $ 0.20 $ 0.20      
Restricted stock expense $ 2,532,000   $ 1,053,000    
Distributions payable, pay date Apr. 13, 2018 Jan. 12, 2018      
Federal income tax rate 21.00%        
Subsequent Event [Member]          
Significant Accounting Policies [Line Items]          
Common stock, shares outstanding       90,135,433  
Common units outstanding       10,214,140  
LTIP units outstanding       1,200,836