Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Dividends Declared To Holders Of Common Units (Details)

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Equity and Mezzanine Equity - Dividends Declared To Holders Of Common Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dividends Payable [Line Items]        
Common unit and common shareholders $ 0 $ 3,187 $ 0 $ 10,288
Preferred shareholders 3,208 2,496 9,621 7,473
Total $ 3,208 $ 5,683 $ 9,621 $ 17,761
Common Stock        
Dividends Payable [Line Items]        
Dividends declared per common share (in usd per share) $ 0 $ 340.00 $ 0 $ 1,100.00
Series A Preferred Stock        
Dividends Payable [Line Items]        
Dividends declared per common share (in usd per share) 22,500.00 22,500.00 67,500.00 67,500.00
Series B Preferred Stock        
Dividends Payable [Line Items]        
Dividends declared per common share (in usd per share) 560.00 560.00 1,690.00 1,690.00
Series D Preferred Stock        
Dividends Payable [Line Items]        
Dividends declared per common share (in usd per share) $ 550.00 $ 550.00 $ 1,640.00 $ 1,640.00