Revenues

6 Months Ended

Jun. 30, 2020

Revenues [Abstract]

Revenues

(4) 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,
	2020		2019		2020		2019
Marine transportation segment:
Inland transportation	$	303,012	$	310,162	$	621,577	$	593,247
Coastal transportation		77,975		94,124		162,667		179,160
	$	380,987	$	404,286	$	784,244	$	772,407
Distribution and services segment:
Oil and gas	$	30,624	$	198,864	$	109,302	$	421,965
Commercial and industrial		129,548		167,892		291,539		321,291
	$	160,172	$	366,756	$	400,841	$	743,256

Contract Assets and Liabilities. Contract liabilities represent advance consideration received from customers, and are recognized as revenue over time as the related performance obligation is satisfied. Revenues recognized in the 2020 and 2019 first six months that were included in the opening contract liability balances were $33,693,000 and $73,370,000, 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 June 30, 2020 or December 31, 2019.

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.