CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Marine transportation	$ 418,343	$ 448,744	$ 1,263,301	$ 1,341,260
Diesel engine services	114,222	231,977	400,093	556,761
Total revenues	532,565	680,721	1,663,394	1,898,021
Costs and expenses:
Costs of sales and operating expenses	333,115	457,177	1,061,641	1,243,866
Selling, general and administrative	48,759	49,331	148,968	154,994
Taxes, other than on income	5,482	3,701	15,405	12,905
Depreciation and amortization	49,759	42,433	142,350	124,876
Loss (gain) on disposition of assets	400	(47)	(1,246)	(625)
Total costs and expenses	437,515	552,595	1,367,118	1,536,016
Operating income	95,050	128,126	296,276	362,005
Other income (expense)	22	27	(221)	(86)
Interest expense	(4,449)	(5,225)	(14,458)	(16,312)
Earnings before taxes on income	90,623	122,928	281,597	345,607
Provision for taxes on income	(33,512)	(45,715)	(104,699)	(129,472)
Net earnings	57,111	77,213	176,898	216,135
Less: Net earnings attributable to noncontrolling interests	(268)	(496)	(902)	(2,180)
Net earnings attributable to Kirby	$ 56,843	$ 76,717	$ 175,996	$ 213,955
Net earnings per share attributable to Kirby common stockholders:
Basic (in dollars per share)	$ 1.04	$ 1.34	$ 3.18	$ 3.75
Diluted (in dollars per share)	$ 1.04	$ 1.34	$ 3.17	$ 3.74