Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions - Equity Transactions - Schedule of Equity Distribution Declared (Detail)

v3.19.3
Recent Transactions - Equity Transactions - Schedule of Equity Distribution Declared (Detail) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Schedule Of Equity [Line Items]    
Cash Distributed (in thousands) $ 5,160 $ 5,104
Dividend Payment One [Member]    
Schedule Of Equity [Line Items]    
Announcement Date Sep. 11, 2019  
Record Date Sep. 23, 2019  
Payment Date Sep. 30, 2019  
Amount Per Share $ 0.0650  
Cash Distributed (in thousands) $ 1,730  
Dividend Payment Two [Member]    
Schedule Of Equity [Line Items]    
Announcement Date May 14, 2019  
Record Date Jun. 14, 2019  
Payment Date Jun. 28, 2019  
Amount Per Share $ 0.0650  
Cash Distributed (in thousands) $ 1,728  
Dividend Payment Three [Member]    
Schedule Of Equity [Line Items]    
Announcement Date Mar. 07, 2019  
Record Date Mar. 19, 2019  
Payment Date Mar. 29, 2019  
Amount Per Share $ 0.0650  
Cash Distributed (in thousands) $ 1,702