CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,617	$ 20,102
Accounts receivable:
Trade - less allowance for doubtful accounts	400,870	452,222
Other	111,221	106,231
Inventories - net	453,173	315,729
Prepaid expenses and other current assets	85,639	62,798
Total current assets	1,054,520	957,082
Property and equipment	5,056,335	4,360,882
Less accumulated depreciation	(1,494,835)	(1,401,617)
Property and equipment - net	3,561,500	2,959,265
Goodwill	960,006	935,135
Other intangibles - net	228,958	232,808
Other assets	49,348	43,137
Total assets	5,854,332	5,127,427
Current liabilities:
Bank notes payable	508	3
Income taxes payable	3,765	191
Accounts payable	250,681	222,005
Accrued liabilities	237,129	209,760
Deferred revenues	75,843	48,347
Total current liabilities	567,926	480,306
Long-term debt - less current portion	1,399,423	992,403
Deferred income taxes	544,882	468,451
Other long-term liabilities	108,953	72,044
Total long-term liabilities	2,053,258	1,532,898
Contingencies and commitments
Kirby stockholders' equity:
Common stock, $.10 par value per share. Authorized 120,000,000 shares, issued 65,472,000 shares	6,547	6,547
Additional paid-in capital	820,805	802,961
Accumulated other comprehensive income - net	(39,544)	(32,405)
Retained earnings	2,748,029	2,646,937
Treasury stock - at cost, 5,595,000 shares at September 30, 2018 and 5,783,000 at December 31, 2017	(305,926)	(313,220)
Total Kirby stockholders' equity	3,229,911	3,110,820
Noncontrolling interests	3,237	3,403
Total equity	3,233,148	3,114,223
Total liabilities and equity	$ 5,854,332	$ 5,127,427