Quarterly report pursuant to Section 13 or 15(d)

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

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Stockholders' and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Stockholders' equity, beginning balance $ 239,877  
Issuance of Series A and B preferred stock and common stock, net 2,354  
Distributions declared to common, senior common and preferred stockholders (11,983)  
Net income 4,356 $ 853
Stockholders' equity, ending balance $ 234,604  
Series A and B Preferred Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Stockholders' equity, beginning balance (in shares) 2,264,000  
Stockholders' equity, beginning balance $ 2  
Stockholders' equity, ending balance (in shares) 2,264,000  
Stockholders' equity, ending balance $ 2  
Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Stockholders' equity, beginning balance (in shares) 24,882,758  
Stockholders' equity, beginning balance $ 25  
Issuance of preferred stock and common stock, net (in shares) 119,356  
Issuance of Series A and B preferred stock and common stock, net $ 0  
Conversion of senior common stock to common stock (in shares) 1,728  
Stockholders' equity, ending balance (in shares) 25,003,842  
Stockholders' equity, ending balance $ 25  
Common Stock | Senior Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Stockholders' equity, beginning balance (in shares) 959,552  
Stockholders' equity, beginning balance $ 1  
Conversion of senior common stock to common stock (in shares) (2,071)  
Stockholders' equity, ending balance (in shares) 957,481  
Stockholders' equity, ending balance $ 1  
Additional Paid in Capital    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Stockholders' equity, beginning balance 463,436  
Issuance of Series A and B preferred stock and common stock, net 2,354  
Stockholders' equity, ending balance 465,790  
Distributions in Excess of Accumulated Earnings    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Stockholders' equity, beginning balance (223,587)  
Distributions declared to common, senior common and preferred stockholders (11,983)  
Net income 4,356  
Stockholders' equity, ending balance $ (231,214)