CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Marine transportation	$ 359,031	$ 418,343	$ 1,115,677	$ 1,263,301
Diesel engine services	75,677	114,222	219,346	400,093
Total revenues	434,708	532,565	1,335,023	1,663,394
Costs and expenses:
Costs of sales and operating expenses	282,168	333,115	847,975	1,061,641
Selling, general and administrative	40,645	48,759	133,948	148,968
Taxes, other than on income	5,445	5,482	16,317	15,405
Depreciation and amortization	50,142	49,759	148,427	142,350
Loss (gain) on disposition of assets	122	400	(39)	(1,246)
Total costs and expenses	378,522	437,515	1,146,628	1,367,118
Operating income	56,186	95,050	188,395	296,276
Other income (expense)	(120)	22	194	(221)
Interest expense	(4,507)	(4,449)	(13,213)	(14,458)
Earnings before taxes on income	51,559	90,623	175,376	281,597
Provision for taxes on income	(19,206)	(33,512)	(65,430)	(104,699)
Net earnings	32,353	57,111	109,946	176,898
Less: Net earnings attributable to noncontrolling interests	(343)	(268)	(895)	(902)
Net earnings attributable to Kirby	$ 32,010	$ 56,843	$ 109,051	$ 175,996
Net earnings per share attributable to Kirby common stockholders:
Basic (in dollars per share)	$ 0.59	$ 1.04	$ 2.03	$ 3.18
Diluted (in dollars per share)	$ 0.59	$ 1.04	$ 2.02	$ 3.17