Revenues

3 Months Ended

Mar. 31, 2021

Revenues [Abstract]

Revenues

(2) Revenues

The following table sets forth the Company’s revenues by major source (in thousands):

	Three Months Ended March 31,
	2021		2020
Marine transportation segment:
Inland transportation	$	224,451	$	318,565
Coastal transportation		76,500		84,692
	$	300,951	$	403,257
Distribution and services segment:
Commercial and industrial	$	132,908	$	161,991
Oil and gas		62,991		78,678
	$	195,899	$	240,669

Contract liabilities represent advance consideration received from customers, and are recognized as revenue over time as the related performance obligation is satisfied. Revenues recognized during the three months ended March 31, 2021 and 2020 that were included in the opening contract liability balances were $30,753,000 and $32,386,000, respectively. The Company presents all contract liabilities within the deferred revenues financial statement caption on the balance sheets.  The Company did not have any contract assets at March 31, 2021 or December 31, 2020. The Company applies the practical expedient that allows non-disclosure of information about remaining performance obligations that have original expected durations of one year or less.