CONDENSED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 3,684	$ 4,022
Accounts receivable:
Trade - less allowance for doubtful accounts	395,868	311,549
Other	93,692	43,053
Inventories - net	164,843	135,887
Prepaid expenses and other current assets	48,214	40,037
Deferred income taxes	8,409	9,458
Total current assets	714,710	544,006
Property and equipment	3,584,634	3,375,893
Less accumulated depreciation	(1,099,203)	(1,005,090)
Property and equipment - net	2,485,431	2,370,803
Goodwill	591,405	591,405
Other assets	160,588	176,303
Total assets	3,952,134	3,682,517
Current liabilities:
Income taxes payable	3,082	2,915
Accounts payable	210,448	177,375
Accrued liabilities	176,733	129,001
Deferred revenues	68,873	36,698
Total current liabilities	459,136	345,989
Long-term debt - less current portion	649,350	749,150
Deferred income taxes	574,145	544,110
Other long-term liabilities	15,052	21,115
Total long-term liabilities	1,238,547	1,314,375
Contingencies and commitments
Kirby stockholders' equity:
Common stock, $.10 par value per share. Authorized 120,000,000 shares, issued 59,776,000 shares	5,978	5,978
Additional paid-in capital	425,606	410,615
Accumulated other comprehensive income - net	(16,254)	(16,793)
Retained earnings	1,906,095	1,692,140
Treasury stock at cost, 2,718,000 at September 30, 2014 and 2,930,000 at December 31, 2013	(78,188)	(81,254)
Total Kirby stockholders' equity	2,243,237	2,010,686
Noncontrolling interests	11,214	11,467
Total equity	2,254,451	2,022,153
Total liabilities and equity	$ 3,952,134	$ 3,682,517