In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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Name:	us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent Events (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
Subsequent Events (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jul. 01, 2020
Subsequent Event [Line Items]
Bargain purchase gain		$ 4,671	$ 0	$ 4,671	$ 0
Subsequent Event \| Intercoastal
Subsequent Event [Line Items]
Percentage of common interest acquired						47.00%
Preferred units acquired						$ 7,500
Subsequent Event \| Forecast \| Minimum \| Intercoastal
Subsequent Event [Line Items]
Bargain purchase gain	$ 1,000
Subsequent Event \| Forecast \| Maximum \| Intercoastal
Subsequent Event [Line Items]
Bargain purchase gain	$ 3,000