CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 51,078	$ 74,444
Accounts receivable:
Trade - less allowance for doubtful accounts	505,617	489,857
Other	48,003	46,888
Inventories - net	434,706	393,898
Prepaid expenses and other current assets	62,876	63,472
Total current assets	1,102,280	1,068,559
Property and equipment	6,310,311	6,123,208
Accumulated depreciation	(2,161,012)	(2,100,242)
Property and equipment - net	4,149,299	4,022,966
Operating lease right-of-use assets	157,903	158,990
Goodwill	438,748	438,748
Other intangibles, net	32,275	34,406
Other assets	134,096	128,283
Total assets	6,014,601	5,851,952
Current liabilities:
Bank notes payable	7,337	8,226
Income taxes payable	21,927	25,417
Accounts payable	272,163	251,354
Accrued liabilities	190,412	236,813
Current portion of operating lease liabilities	35,417	35,727
Deferred revenues	171,327	177,216
Total current liabilities	698,583	734,753
Long-term debt, net - less current portion	1,091,032	866,722
Deferred income taxes	741,417	739,472
Operating lease liabilities - less current portion	146,250	148,170
Other long-term liabilities	9,565	9,587
Total long-term liabilities	1,988,264	1,763,951
Contingencies and commitments	0	0
Kirby stockholders' equity:
Common stock, $0.10 par value per share. Authorized 120 million shares, issued 65.5 million shares	6,547	6,547
Additional paid-in capital	865,007	868,763
Accumulated other comprehensive income - net	69,633	71,192
Retained earnings	3,054,358	2,978,372
Treasury stock - at cost, 9.1 million shares at March 31, 2025 and 8.2 million at December 31, 2024	(669,510)	(573,061)
Total Kirby stockholders' equity	3,326,035	3,351,813
Noncontrolling interests	1,719	1,435
Total equity	3,327,754	3,353,248
Total liabilities and equity	$ 6,014,601	$ 5,851,952