CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 78,775	$ 74,444
Accounts receivable:
Trade - less allowance for doubtful accounts of $7,175 ($7,321 in 2024)	473,497	489,857
Other	69,622	46,888
Inventories - net	398,026	393,898
Prepaid expenses and other current assets	57,935	63,472
Total current assets	1,077,855	1,068,559
Property and equipment - net	4,098,058	4,022,966
Operating lease right-of-use assets	193,276	158,990
Investment in affiliates	3,188	2,900
Goodwill	438,748	438,748
Other intangibles, net	30,165	34,406
Other assets	166,755	125,383
Total assets	6,008,045	5,851,952
Current liabilities:
Bank notes payable	7,357	8,226
Income taxes payable	0	25,417
Accounts payable	218,614	251,354
Accrued liabilities:
Interest	11,866	11,975
Insurance premiums and claims	82,646	88,432
Employee compensation	65,719	68,298
Taxes - other than on income	31,961	35,854
Other	40,431	32,254
Current portion of operating lease liabilities	45,766	35,727
Deferred revenues	202,164	177,216
Total current liabilities	706,524	734,753
Long-term debt, net - less current portion	911,924	866,722
Deferred income taxes	826,373	739,472
Operating lease liabilities - less current portion	169,854	148,170
Other long-term liabilities	10,577	9,587
Total long-term liabilities	1,918,728	1,763,951
Contingencies and commitments	0	0
Kirby stockholders' equity:
Common stock, $0.10 par value per share. Authorized 120,000,000 shares, issued 65,472,000	6,547	6,547
Additional paid-in capital	873,249	868,763
Accumulated other comprehensive income - net	86,342	71,192
Retained earnings	3,332,941	2,978,372
Treasury stock - at cost, 11,701,000 shares in 2025 and 8,215,000 shares in 2024	(918,567)	(573,061)
Total Kirby stockholders' equity	3,380,512	3,351,813
Noncontrolling interests	2,281	1,435
Total equity	3,382,793	3,353,248
Total liabilities and equity	$ 6,008,045	$ 5,851,952