Stockholders' Equity and Partners' Capital - Summary of Dividends Declared (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
May 30, 2019
Feb. 28, 2019
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Equity [Abstract]                
Preferred stock, dividend per share (in USD per share) $ 0.375 $ 0.375            
Preferred stock, total amount $ 2,588 $ 2,588 $ 2,588 $ 2,588 $ 2,588 $ 2,588    
Common stock, dividend per share (in USD per share) $ 0.625 $ 0.625 $ 0.6250   $ 0.9000   $ 1.2500 $ 1.8000
Common stock, total amount $ 56,318 $ 54,254 $ 56,318 $ 54,254 $ 77,143 $ 78,581