CONDENSED STATEMENTS OF EARNINGS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Total revenues	$ 745,843	$ 598,920	$ 2,054,589	$ 1,655,394
Costs and expenses:
Costs of sales and operating expenses	552,392	446,519	1,526,872	1,219,038
Selling, general and administrative	75,381	66,065	221,721	198,434
Taxes, other than on income	9,121	9,917	28,332	28,541
Depreciation and amortization	50,419	53,462	150,498	163,484
Impairments	0	340,713	0	340,713
Gain on disposition of assets	(377)	(830)	(7,971)	(5,082)
Total costs and expenses	686,936	915,846	1,919,452	1,945,128
Operating income (loss)	58,907	(316,926)	135,137	(289,734)
Other income	3,805	1,832	11,853	8,146
Interest expense	(11,755)	(10,500)	(32,598)	(32,172)
Earnings (loss) before taxes on income	50,957	(325,594)	114,392	(313,760)
(Provision) benefit for taxes on income	(11,713)	60,442	(28,956)	55,840
Net earnings (loss)	39,244	(265,152)	85,436	(257,920)
Net (earnings) loss attributable to noncontrolling interests	(153)	422	(454)	5
Net earnings (loss) attributable to Kirby	$ 39,091	$ (264,730)	$ 84,982	$ (257,915)
Net earnings loss per share attributable to Kirby common stockholders:
Basic	$ 0.65	$ (4.41)	$ 1.41	$ (4.30)
Diluted	$ 0.65	$ (4.41)	$ 1.41	$ (4.30)
Marine Transportation [Member]
Revenues:
Total revenues	$ 433,040	$ 338,514	$ 1,194,231	$ 972,352
Distribution and Services [Member]
Revenues:
Total revenues	$ 312,803	$ 260,406	$ 860,358	$ 683,042