CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 52,333	$ 80,338
Accounts receivable:
Trade - less allowance for doubtful accounts	347,275	315,283
Other	171,749	284,899
Inventories - net	326,475	309,675
Prepaid expenses and other current assets	60,685	57,776
Total current assets	958,517	1,047,971
Property and equipment	5,585,574	5,615,400
Accumulated depreciation	(1,704,301)	(1,698,330)
Property and equipment - net	3,881,273	3,917,070
Operating lease right-of-use assets	172,198	174,317
Goodwill	657,800	657,800
Other intangibles, net	66,646	68,979
Other assets	51,652	58,037
Total assets	5,788,086	5,924,174
Current liabilities:
Bank notes payable	434	40
Income taxes payable	489	474
Accounts payable	175,890	162,507
Accrued liabilities	198,487	224,855
Current portion of operating lease liabilities	32,722	32,750
Deferred revenues	45,421	45,406
Total current liabilities	453,443	466,032
Long-term debt, net - less current portion	1,348,904	1,468,546
Deferred income taxes	606,561	606,844
Operating lease liabilities - less current portion	161,133	163,496
Other long-term liabilities	129,301	131,703
Total long-term liabilities	2,245,899	2,370,589
Contingencies and commitments
Kirby stockholders' equity:
Common stock, $0.10 par value per share. Authorized 120,000,000 shares, issued 65,472,000 shares	6,547	6,547
Additional paid-in capital	846,259	844,979
Accumulated other comprehensive income - net	(61,204)	(61,452)
Retained earnings	2,590,018	2,593,393
Treasury stock - at cost, 5,384,000 shares at March 31, 2021 and 5,434,000 at December 31, 2020	(296,353)	(299,161)
Total Kirby stockholders' equity	3,085,267	3,084,306
Noncontrolling interests	3,477	3,247
Total equity	3,088,744	3,087,553
Total liabilities and equity	$ 5,788,086	$ 5,924,174