Partners' Equity - Narrative (Details) - USD ($)		9 Months Ended
May 12, 2017	Sep. 30, 2020
Distribution Made to Limited Partner [Line Items]
Limited partners' capital account, required quarterly distribution period		60 days
At-the-market Program [Member]
Distribution Made to Limited Partner [Line Items]
Sale of Stock, Consideration Received Per Transaction	$ 200,000,000

Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

No definition available.

Name:	us-gaap_SaleOfStockConsiderationReceivedPerTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration