Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail)

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Equity and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance $ 249,744    
Comprehensive income (722) $ 495  
Net income 4,673 4,605  
Stockholders' equity, ending balance 253,629    
Total Equity 258,291 259,033 $ 254,419
Senior Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance 1 1  
Issuance of Series A and B preferred stock and common stock, net 0 0  
Stockholders' equity, ending balance 1 1  
Series A and B Preferred Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance 2 2  
Issuance of Series A and B preferred stock and common stock, net 0 0  
Stockholders' equity, ending balance 2 2  
Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance 29 28  
Issuance of Series A and B preferred stock and common stock, net 1 0  
Stockholders' equity, ending balance 30 28  
Additional Paid in Capital      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance 559,977 534,790  
Issuance of Series A and B preferred stock and common stock, net 14,111 643  
Retirement of senior common stock, net 0 (34)  
Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership (220) 0  
Stockholders' equity, ending balance 573,868 535,399  
Accumulated Other Comprehensive Income      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance (148) 35  
Comprehensive income (722) 495  
Stockholders' equity, ending balance (870) 530  
Distributions in Excess of Accumulated Earnings      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance (310,117) (268,058)  
Distributions declared to common, senior common, preferred stockholders and Non-controlling OP Unit holders (13,913) (13,474)  
Net income 4,628 4,605  
Stockholders' equity, ending balance (319,402) (276,927)  
Total Stockholders' Equity      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance 249,744 266,798  
Issuance of Series A and B preferred stock and common stock, net 14,112 643  
Retirement of senior common stock, net 0 (34)  
Distributions declared to common, senior common, preferred stockholders and Non-controlling OP Unit holders (13,913) (13,474)  
Comprehensive income (722) 495  
Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership (220) 0  
Net income 4,628 4,605  
Stockholders' equity, ending balance 253,629 259,033  
Non-Controlling Interest      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Stockholders' equity, beginning balance 4,675 0  
Distributions declared to common, senior common, preferred stockholders and Non-controlling OP Unit holders (278) 0  
Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership 220 0  
Net income 45 0  
Stockholders' equity, ending balance $ 4,662 $ 0