Related Party Transactions - Marine Agreements (Details) - Marine Transportation Agreement - Martin Resource Management	12 Months Ended
Dec. 31, 2019
Related Party Transaction [Line Items]
Automatic consecutive term renewal (in years)	1 year
Minimum term of written notice (in days)	60 days

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration