CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Marine transportation	$ 318,810	$ 359,031	$ 993,727	$ 1,115,677
Distribution and services	222,464	75,677	512,580	219,346
Total revenues	541,274	434,708	1,506,307	1,335,023
Costs and expenses:
Costs of sales and operating expenses	378,340	282,168	1,048,176	847,975
Selling, general and administrative	51,689	40,645	144,338	133,948
Taxes, other than on income	6,518	5,445	19,511	16,317
Depreciation and amortization	51,206	50,142	147,669	148,427
Loss (gain) on disposition of assets	159	122	199	(39)
Total costs and expenses	487,912	378,522	1,359,893	1,146,628
Operating income	53,362	56,186	146,414	188,395
Other income (expense)	(113)	(120)	(230)	194
Interest expense	(5,388)	(4,507)	(14,310)	(13,213)
Earnings before taxes on income	47,861	51,559	131,874	175,376
Provision for taxes on income	(19,072)	(19,206)	(49,468)	(65,430)
Net earnings	28,789	32,353	82,406	109,946
Less: Net earnings attributable to noncontrolling interests	(182)	(343)	(538)	(895)
Net earnings attributable to Kirby	$ 28,607	$ 32,010	$ 81,868	$ 109,051
Net earnings per share attributable to Kirby common stockholders:
Basic (in dollars per share)	$ 0.52	$ 0.59	$ 1.51	$ 2.03
Diluted (in dollars per share)	$ 0.52	$ 0.59	$ 1.50	$ 2.02