Stockholders' Equity and Non-controlling Interests - Distributions (Details)
$ in Thousands
 6 Months Ended
Jul. 19, 2017
shares
Jul. 10, 2017
shares
Apr. 12, 2017
shares
Mar. 27, 2017
shares
Jun. 02, 2016
Jun. 30, 2017
USD ($)
shares
Jun. 30, 2016
USD ($)
Dec. 31, 2016
shares
Jun. 02, 2015
shares
OP units                  
Shareholders' Equity                  
Stock repurchased (in shares)       129,174          
OP units outstanding for redemption           5,200,000   3,000,000 1,993,709
Subsequent event | OP units                  
Shareholders' Equity                  
Stock repurchased (in shares) 531,827 118,634              
Operating Partnership                  
Shareholders' Equity                  
Parent ownership interest (as a percent)           83.70%   75.10%  
Operating Partnership | OP units                  
Shareholders' Equity                  
Parent ownership interest (as a percent)           83.70%      
Common stock                  
Shareholders' Equity                  
Common stock issued (in shares)     328,122 129,174          
Stock repurchased (in shares)     328,122            
Common stock | Subsequent event                  
Shareholders' Equity                  
Common stock issued (in shares) 531,827 118,634              
Common stock | Operating Partnership | OP units                  
Shareholders' Equity                  
Ratio for conversion into common shares         1        
Non-controlling interest                  
Shareholders' Equity                  
Increase of non-controlling interests and decrease of additional paid in capital | $           $ 3,219 $ (4,193)    
Non-controlling interest | Operating Partnership                  
Shareholders' Equity                  
Increase of non-controlling interests and decrease of additional paid in capital | $           $ 3,200 $ 4,200    
Pittman Hough Farms | Operating Partnership                  
Shareholders' Equity                  
Noncontrolling ownership interest (as a percent)           16.30%   24.90%