Revenues

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenues

(3) Revenues

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Marine transportation segment:
Inland transportation	$	316,948	$	253,588	$	594,858	$	478,039
Coastal transportation		88,707		79,299		166,333		155,799
	$	405,655	$	332,887	$	761,191	$	633,838
Distribution and services segment:
Commercial and industrial	$	161,621	$	140,966	$	309,154	$	273,874
Oil and gas		130,688		85,771		238,401		148,762
	$	292,309	$	226,737	$	547,555	$	422,636

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 six months ended June 30, 2022 and 2021 that were included in the opening contract liability balances were $46.7 million and $39.2 million, 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 June 30, 2022 or December 31, 2021. 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.