CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 80,338	$ 24,737
Accounts receivable:
Trade - less allowance for doubtful accounts of $8,807 ($8,372 in 2019)	315,283	379,174
Other	284,899	104,175
Inventories - at lower of average cost or net realizable value	309,675	351,401
Prepaid expenses and other current assets	57,776	58,092
Total current assets	1,047,971	917,579
Property and equipment:
Marine transportation equipment	4,999,777	4,770,213
Land, buildings and equipment	615,623	553,877
Property and equipment	5,615,400	5,324,090
Accumulated depreciation	(1,698,330)	(1,546,980)
Property and equipment - net	3,917,070	3,777,110
Operating lease right-of-use assets	174,317	159,641
Investment in affiliates	2,689	2,025
Goodwill	657,800	953,826
Other intangibles, net	68,979	210,682
Other assets	55,348	58,234
Total assets	5,924,174	6,079,097
Current liabilities:
Bank notes payable	40	16
Income taxes payable	474	665
Accounts payable	162,507	206,778
Accrued liabilities:
Interest	11,272	12,700
Insurance premiums and claims	111,359	108,405
Employee compensation	32,918	42,875
Taxes - other than on income	44,366	39,286
Other	24,940	33,084
Current portion of operating lease liabilities	32,750	27,324
Deferred revenues	45,406	42,982
Total current liabilities	466,032	514,115
Long-term debt, net - less current portion	1,468,546	1,369,751
Deferred income taxes	606,844	588,204
Operating lease liabilities - less current portion	163,496	139,457
Other long-term liabilities	131,703	95,978
Total long-term liabilities	2,370,589	2,193,390
Contingencies and commitments
Kirby stockholders' equity:
Common stock, $0.10 par value per share. Authorized 120,000,000 shares, issued 65,472,000 in 2020 and 2019	6,547	6,547
Additional paid-in capital	844,979	835,899
Accumulated other comprehensive income - net	(61,452)	(37,799)
Retained earnings	2,593,393	2,865,939
Treasury stock - at cost, 5,434,000 shares in 2020 and 5,513,000 shares in 2019	(299,161)	(301,963)
Total Kirby stockholders' equity	3,084,306	3,368,623
Noncontrolling interests	3,247	2,969
Total equity	3,087,553	3,371,592
Total liabilities and equity	$ 5,924,174	$ 6,079,097