CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Marine transportation	$ 425,053	$ 456,745	$ 844,958	$ 892,516
Diesel engine services	118,103	171,309	285,871	324,784
Total revenues	543,156	628,054	1,130,829	1,217,300
Costs and expenses:
Costs of sales and operating expenses	343,745	403,460	728,526	786,689
Selling, general and administrative	49,165	52,065	100,209	105,663
Taxes, other than on income	5,378	4,624	9,923	9,204
Depreciation and amortization	46,825	41,407	92,591	82,443
Gain on disposition of assets	(91)	(527)	(1,646)	(578)
Total costs and expenses	445,022	501,029	929,603	983,421
Operating income	98,134	127,025	201,226	233,879
Other income (expense)	(303)	123	(243)	(113)
Interest expense	(4,759)	(5,469)	(10,009)	(11,087)
Earnings before taxes on income	93,072	121,679	190,974	222,679
Provision for taxes on income	(34,696)	(45,768)	(71,187)	(83,757)
Net earnings	58,376	75,911	119,787	138,922
Less: Net earnings attributable to noncontrolling interests	(301)	(919)	(634)	(1,684)
Net earnings attributable to Kirby	$ 58,075	$ 74,992	$ 119,153	$ 137,238
Net earnings per share attributable to Kirby common stockholders:
Basic (in dollars per share)	$ 1.04	$ 1.32	$ 2.14	$ 2.41
Diluted (in dollars per share)	$ 1.04	$ 1.31	$ 2.13	$ 2.40