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Partners' Capital, Mezzanine Capital and Distributions (Preferred Cash Distributions Paid) (Details) - Preferred Unitholders - Class A Convertible Preferred Stock Units - USD ($)
$ / shares in Units, $ in Thousands
Nov. 14, 2019
Aug. 14, 2019
May 15, 2019
Temporary Equity [Line Items]      
Date Paid   Aug. 14, 2019 May 15, 2019
Partners' Capital Account, Distribution Per Unit of Limited Partner Interest   $ 0.7374 $ 0.2458
Total Amount   $ 18,684 $ 6,138
Forecast | Subsequent Event      
Temporary Equity [Line Items]      
Date Paid Nov. 14, 2019    
Partners' Capital Account, Distribution Per Unit of Limited Partner Interest $ 0.7374    
Total Amount $ 18,684