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Partners' Capital, Mezzanine Equity and Distributions (Additional Information) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Partners Capital And Distributions [Line Items] |  |  |
Cash or stock available for distributions, percent usually distributed | 100.00% |  |
Days to distribute | 45 days |  |
Accumulated distributions attributable to Class A Preferred Unitholders | $ 74,736 | $ 74,467 | $ 69,801
Class A | Partners' Capital |  |  |
Partners Capital And Distributions [Line Items] |  |  |
Common units outstanding (in units) | 122,539,221 |  |
Class B | Partners' Capital |  |  |
Partners Capital And Distributions [Line Items] |  |  |
Common units outstanding (in units) | 39,997 |  |
Class A Convertible Preferred Units |  |  |
Partners Capital And Distributions [Line Items] |  |  |
Convertible preferred units outstanding (in units) | 25,336,778 | 25,336,778 | 24,438,022
Accumulated distributions attributable to Class A Preferred Unitholders | $ 74,700 | $ 74,500 | $ 69,800

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- Definition The number of limited partner units outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770 + Details
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- Definition The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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