Stockholders' Equity and Partners' Capital - Summary of Dividends Declared (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 15, 2017
Jun. 15, 2017
Mar. 15, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Equity [Abstract]              
Dividend per share (in USD per share) $ 0.18000 $ 0.18000 $ 0.18000 $ 0.18000 $ 0.17500 $ 0.54000 $ 0.52500
Total dividends $ 82,062 $ 82,422 $ 87,122