Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 884,728	$ 886,435	[1]
Depreciation expense	53,856	58,615		$ 61,590
Amortization of right-of-use assets	2,686
Capital leases, amortization expense		1,174		139
Gross assets under capital leases	15,367
Gross assets under capital leases		14,058
Capital leases, accumulated depreciation	3,941
Capital leases, accumulated amortization		1,266
Additions to property, plant and equipment included in accounts payable	3,791	2,166
Capital leased assets, additions	1,308
Capital leased assets, additions		10,472		$ 3,551
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	22,083	22,204
Improvements to land and buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 135,666	$ 134,783
Improvements to land and buildings | Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	10 years	10 years
Improvements to land and buildings | Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	25 years	25 years
Storage equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 120,788	$ 120,005
Storage equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	5 years	5 years
Storage equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	50 years	50 years
Marine vessels
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 182,115	$ 191,070
Marine vessels | Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	4 years	4 years
Marine vessels | Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	25 years	25 years
Operating plant and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 343,236	$ 352,235
Operating plant and equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	3 years	3 years
Operating plant and equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	50 years	50 years
Furniture, fixtures and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 12,896	$ 12,119
Furniture, fixtures and other equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	3 years	3 years
Furniture, fixtures and other equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	20 years	20 years
Transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 47,525	$ 40,582
Transportation equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	3 years	3 years
Transportation equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives (in years)	7 years	7 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost (Note 8)	$ 20,419	$ 13,437

[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.