Revenue Recognition

3 Months Ended

Mar. 31, 2021

Revenue Recognition [Abstract]

Revenue Recognition

Revenue Recognition

Revenue from Contracts with Customers

The following tables reflect the disaggregation of our revenues by major category for the 2021 Quarter and the three months ended March 31, 2020 (the "2020 Quarter"), respectively:

	Three Months Ended March 31, 2021
	Offshore Pipeline Transportation		Sodium Minerals & Sulfur Services		Marine Transportation		Onshore Facilities and Transportation		Consolidated
Fee-based revenues	$	64,384	$	—	$	40,331	$	24,394	$	129,109
Product Sales	—		204,778		—		164,823		369,601
Refinery Services	—		22,509		—		—		22,509
	$	64,384	$	227,287	$	40,331	$	189,217	$	521,219

	Three Months Ended March 31, 2020
	Offshore Pipeline Transportation		Sodium Minerals & Sulfur Services		Marine Transportation		Onshore Facilities & Transportation		Consolidated
Fee-based revenues	$	78,429	$	—	$	62,346	$	40,990	$	181,765
Product Sales	—		215,366		—		114,768		330,134
Refinery Services	—		28,024		—		—		28,024
	$	78,429	$	243,390	$	62,346	$	155,758	$	539,923

    The Company recognizes revenue upon the satisfaction of its performance obligations under its contracts. The timing of revenue recognition varies for our different revenue streams. In general, the timing includes recognition of revenue over time as services are being performed as well as recognition of revenue at a point in time, for delivery of products.

Contract Assets and Liabilities

    The table below depicts our contract asset and liability balances at December 31, 2020 and March 31, 2021:

	Contract Assets				Contract Liabilities
	Current		Non-Current		Current		Non-Current
Balance at December 31, 2020	$	36,500	$	12,065	$	2,988	$	19,834
Balance at March 31, 2021	35,930		3,174		2,849		19,187

Transaction Price Allocations to Remaining Performance Obligations

    We are required to disclose the amount of our transaction prices that are allocated to unsatisfied performance obligations as of March 31, 2021. We are exempted from disclosing performance obligations with a duration of one year or less, revenue recognized related to performance obligations where the consideration corresponds directly with the value provided to customers, and contracts with variable consideration that is allocated wholly to an unsatisfied performance obligation or promise to transfer a good or service that is part of a series in accordance with ASC 606.

    The majority of our contracts qualify for one of these expedients or exemptions. For the remaining contract types that involve revenue recognition over a long-term period with long-term fixed consideration (adjusted for indexing as required), we determined our allocations of transaction price that relate to unsatisfied performance obligations. For our tiered pricing offshore transportation contracts, we provide firm capacity for both fixed and variable consideration over a long term period. Therefore, we have allocated the remaining contract value to future periods.

    The following chart depicts how we expect to recognize revenues for future periods related to these contracts:

	Offshore Pipeline Transportation		Onshore Facilities and Transportation
Remainder of 2021	$	48,198	$	14,369
2022	75,623		4,703
2023	63,982		—
2024	56,326		—
2025	60,311		—
Thereafter	97,761		—
Total	$	402,201	$	19,072