Note 12 - Segment and Geographic Distribution of Operations - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Revenue	$ 333,444	$ 321,164
Total vessel operating costs	164,979	167,556
General and Administrative Expense	29,094	25,329
Depreciation and amortization	65,432	56,270
Additions to properties and equipment	19,364	10,942
Total assets	2,066,166	2,077,816	$ 2,074,904
Costs of other operating revenues	1,430	1,150
Corporate expenses	258,397	239,266
Gain on asset dispositions, net	2,538	11,039
Operating income	75,047	81,898
Operating Segments [Member]
Revenue	333,444	321,164
Crew costs	97,113	102,352
Repair and maintenance	21,954	21,348
Insurance	3,034	2,580
Fuel, lube and supplies	14,378	17,318
Other	28,500	23,958
Total vessel operating costs	164,979	167,556
General and Administrative Expense	15,108	13,337
Depreciation and amortization	64,483	55,524
Operating profit	87,444	83,597
Additions to properties and equipment	17,525	10,227
Total assets	1,868,191	1,874,382
Costs of other operating revenues	1,430	1,150
Operating Segments [Member] \| Americas [Member]
Crew costs	17,440	24,062
Repair and maintenance	4,266	4,534
Insurance	571	494
Fuel, lube and supplies	2,617	4,522
Other	10,129	5,928
Total vessel operating costs	35,023	39,540
General and Administrative Expense	3,542	3,332
Depreciation and amortization	11,392	10,943
Operating profit	4,895	10,126
Additions to properties and equipment	1,933	3,495
Total assets	354,153	388,140
Operating Segments [Member] \| Asia Pacific [Member]
Crew costs	20,331	19,306
Repair and maintenance	2,270	2,769
Insurance	324	273
Fuel, lube and supplies	1,767	1,937
Other	2,118	2,491
Total vessel operating costs	26,810	26,776
General and Administrative Expense	2,420	2,126
Depreciation and amortization	5,318	4,032
Operating profit	13,680	14,847
Additions to properties and equipment	592	194
Total assets	162,329	193,734
Operating Segments [Member] \| Middle East [Member]
Crew costs	13,280	13,270
Repair and maintenance	4,100	4,508
Insurance	529	420
Fuel, lube and supplies	2,039	2,304
Other	4,588	6,006
Total vessel operating costs	24,536	26,508
General and Administrative Expense	2,937	2,622
Depreciation and amortization	7,266	7,273
Operating profit	8,563	1,529
Additions to properties and equipment	854	834
Total assets	188,242	183,945
Operating Segments [Member] \| Europe and Mediterranean [Member]
Crew costs	27,111	26,282
Repair and maintenance	6,711	5,493
Insurance	848	756
Fuel, lube and supplies	3,147	4,094
Other	4,738	4,359
Total vessel operating costs	42,555	40,984
General and Administrative Expense	3,663	3,202
Depreciation and amortization	24,609	21,438
Operating profit	7,378	14,757
Additions to properties and equipment	1,314	5,493
Total assets	635,046	669,886
Operating Segments [Member] \| West Africa [Member]
Crew costs	18,951	19,432
Repair and maintenance	4,607	4,044
Insurance	762	637
Fuel, lube and supplies	4,808	4,461
Other	6,927	5,174
Total vessel operating costs	36,055	33,748
General and Administrative Expense	2,546	2,055
Depreciation and amortization	15,898	11,838
Operating profit	51,613	41,010
Additions to properties and equipment	12,832	211
Total assets	528,421	438,677
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Additions to properties and equipment	1,839	715
Total assets	197,975	203,434
Corporate expenses	(14,935)	(12,738)
Vessel [Member]
Revenue	330,699	318,686
Vessel [Member] \| Operating Segments [Member]
Revenue	330,699	318,686
Vessel [Member] \| Operating Segments [Member] \| Americas [Member]
Revenue	54,852	63,941
Vessel [Member] \| Operating Segments [Member] \| Asia Pacific [Member]
Revenue	48,228	47,781
Vessel [Member] \| Operating Segments [Member] \| Middle East [Member]
Revenue	43,302	37,932
Vessel [Member] \| Operating Segments [Member] \| Europe and Mediterranean [Member]
Revenue	78,205	80,381
Vessel [Member] \| Operating Segments [Member] \| West Africa [Member]
Revenue	106,112	88,651
Product and Service, Other [Member]
Revenue	2,745	2,478
Product and Service, Other [Member] \| Operating Segments [Member]
Revenue	$ 2,745	$ 2,478

TIDEWATER INC 10-Q