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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. 13, 2020	Aug. 14, 2020	May 15, 2020	Feb. 14, 2020	Nov. 14, 2019	Aug. 14, 2019	May 15, 2019
Temporary Equity [Line Items]
Date Paid		Aug. 14, 2020	May 15, 2020	Feb. 14, 2020	Nov. 14, 2019	Aug. 14, 2019	May 15, 2019
Per Unit Amount (in dollars per unit)		$ 0.7374	$ 0.7374	$ 0.7374	$ 0.7374	$ 0.7374	$ 0.2458
Total Amount		$ 18,684	$ 18,684	$ 18,684	$ 18,684	$ 18,684	$ 6,138
Forecast | Subsequent Event
Temporary Equity [Line Items]
Date Paid	Nov. 13, 2020
Per Unit Amount (in dollars per unit)	$ 0.7374
Total Amount	$ 18,684

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Amount of cash distribution paid to unit-holder of limited partnership (LP).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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Date of distribution for distribution of cash or unit to limited partner of limited partnership (LP), in CCYY-MM-DD format.

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The amount of the distribution per unit of limited partner interest.

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-SubTopic 10
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