Acquisitions (Tables)

12 Months Ended

Dec. 31, 2012

Acquisitions [Abstract]

Schedule of pro forma revenues, basic and diluted net earnings per share

The following table sets forth the Company's pro forma revenues, net earnings attributable to Kirby, basic net earnings per share and fully diluted net earnings per share attributable to Kirby common stockholders for the years ended December 31, 2012, 2011 and 2010 (unaudited and in thousands, except per share amounts):

	2012		2011 Pro forma		2010 Pro forma
Revenues	$	2,112,658	$	2,105,904	$	1,685,173
Net earnings attributable to Kirby	$	209,438	$	172,426	$	123,981
Net earnings per share attributable to Kirby common stockholders:
Basic	$	3.75	$	3.10	$	2.22
Diluted	$	3.73	$	3.09	$	2.22