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Management Opinion
3 Months Ended
Mar. 31, 2013
Management Opinion [Abstract]  
Management Opinion
In the opinion of management, the accompanying unaudited condensed financial statements of Kirby Corporation and consolidated subsidiaries (the "Company") contain all adjustments (consisting of only normal recurring accruals) necessary to present fairly the financial position as of March 31, 2013 and December 31, 2012, and the results of operations for the three months ended March 31, 2013 and 2012.