Discontinued Operations, Divestitures, and Assets Held for Sale - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets - Natural Gas Storage Assets	$ 0	$ 9,428	[1]
Non-current assets - Natural Gas Storage Assets	0	395,389	[1]
Current liabilities - Natural Gas Storage Assets	0	3,240	[1]
Non-current liabilities - Natural Gas Storage Assets	$ 0	669	[1]
Discontinued Operations, Disposed of by Sale | Natural Gas Storage Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts and other receivables		7,269
Inventories		1,942
Other current assets		217
Current assets - Natural Gas Storage Assets		9,428
Property, plant and equipment, at cost		425,138
Accumulated depreciation		(49,238)
Intangibles and other assets, net		19,489
Non-current assets - Natural Gas Storage Assets		395,389
Trade and other accounts payable		1,682
Product exchange payable		1,134
Due to affiliates		2
Other accrued liabilities		422
Current liabilities - Natural Gas Storage Assets		3,240
Other long-term obligations		669
Non-current liabilities - Natural Gas Storage Assets		$ 669

[1] Financial information has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 2 – Significant Accounting Policies and Practices.