Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Recent Transactions - Equity Transactions - Schedule of Equity Distribution Declared (Detail) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Schedule Of Equity [Line Items]    
Cash Distributed (in thousands) $ 3,430 $ 3,402
Dividend Payment One [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 Two [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