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Common Stock and Other Equity Related Transactions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Apr. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Oct. 26, 2018
Class of Stock            
Common stock, shares authorized (shares) 400,000,000   400,000,000 200,000,000 200,000,000  
Common stock, par value (usd per share) $ 0.01       $ 0.01  
OP units were exchanged for an equal number of shares of common stock (OP Units) 495,325 13,838        
ATM            
Class of Stock            
Common stock, par value (usd per share)           $ 0.01
Aggregate offering price           $ 200.0
Remaining authorized shares (shares) $ 140.7