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Subsequent Events (Details) - $ / shares
1 Months Ended 4 Months Ended 6 Months Ended
Jan. 18, 2017
Jan. 20, 2016
Apr. 20, 2017
Apr. 26, 2016
Jun. 30, 2017
Common Unitholders          
Subsequent Event [Line Items]          
Dividends Payable, Date Declared         Jul. 20, 2017
Dividend declared $ 0.08 $ 0.2385 $ 0.08 $ 0.075 $ 0.08
Dividends Payable, Date to be Paid         Aug. 11, 2017
Dividends Payable, Date of Record         Aug. 03, 2017
Preferred Unitholders          
Subsequent Event [Line Items]          
Dividends Payable, Date Declared         Jul. 20, 2017
Dividend declared $ 0.21375 $ 0.21975 $ 0.21375 $ 0.21375 $ 0.21375
Dividends Payable, Date to be Paid         Aug. 10, 2017
Dividends Payable, Date of Record         Aug. 02, 2017