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Partners' Capital, Mezzanine Equity and Distributions (Changes in Redeemable Noncontrolling Interests) (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Sep. 23, 2019	Dec. 31, 2019	Dec. 31, 2019
Redeemable Noncontrolling Interest, Equity [Roll Forward]
Issuance of Preferred Units	$ 55,000
Issuance costs	(5,600)
Balance as of September 23, 2019			$ 0
Issuance of preferred units, net of issuance costs		$ 73,500
Distribution paid-in-kind		1,778
Redemption accretion		455
Balance as of December 31, 2019	$ 49,400	$ 125,133	$ 125,133

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph 14
-URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764

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