Fixed Assets, Mineral Leaseholds, and Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2020

Fixed Assets And Asset Retirement Obligations [Abstract]

Schedule of Fixed Assets

Fixed assets, net consisted of the following:

	March 31, 2020			December 31, 2019
Crude oil pipelines and natural gas pipelines and related assets	$	2,892,342		$	2,891,489
Alkali facilities, machinery, and equipment	594,263			591,547
Onshore facilities, machinery, and equipment	641,135			640,376
Transportation equipment	19,662			19,864
Marine vessels	994,730			979,171
Land, buildings and improvements	238,992			238,451
Office equipment, furniture and fixtures	22,659			22,645
Construction in progress	122,036			115,162
Other	41,891			41,891
Fixed assets, at cost	5,567,710			5,540,596
Less: Accumulated depreciation	(1,311,219		)	(1,246,121		)
Net fixed assets	$	4,256,491		$	4,294,475

Schedule of Mineral Leaseholds

Our Mineral Leaseholds, relating to our Alkali Business, consist of the following:

	March 31, 2020			December 31, 2019
Mineral leaseholds	$	566,019		$	566,019
Less: Accumulated depletion	(11,157		)	(10,194		)
Mineral leaseholds, net of accumulated depletion	$	554,862		$	555,825

Schedule of Depreciation and Depletion Expense

Our depreciation and depletion expense for the periods presented was as follows:

	Three Months Ended March 31,
	2020		2019
Depreciation expense	$	69,242	$	71,672
Depletion expense	963		1,319

Schedule of Change in Asset Retirement Obligation

The following table presents information regarding our AROs since December 31, 2019:

ARO liability balance, December 31, 2019	$	175,081
Accretion expense	2,233
Changes in estimate	(800		)
Settlements	(6,986		)
ARO liability balance, March 31, 2020	$	169,528

Schedule of Forecast of Accretion Expense of Asset Retirement Obligations

With respect to our AROs, the following table presents our estimate of accretion expense for the periods indicated:

Remainder of	2020	$	7,029
	2021	$	9,402
	2022	$	9,412
	2023	$	10,075
	2024	$	10,786