Condensed Consolidated Statements of Operations (Unuadited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues:
Revenue	$ 339,230	$ 214,961	$ 660,394	$ 408,065
Costs and expenses:
Vessel operating costs	176,513	118,264	344,069	233,723
Costs of other operating revenues	816	373	1,966	1,524
General and administrative	26,329	26,013	51,658	49,558
Depreciation and amortization	59,445	32,768	115,715	63,434
Gain on asset dispositions, net	(2,000)	(1,404)	(13,039)	(3,620)
Total costs and expenses	261,103	176,014	500,369	344,619
Operating income	78,127	38,947	160,025	63,446
Other income (expense):
Foreign exchange loss	(2,376)	(3,819)	(6,461)	(1,471)
Equity in net earnings of unconsolidated companies	5	25	0	25
Interest income and other, net	1,175	2,790	2,658	2,920
Interest and other debt costs, net	(19,127)	(4,731)	(38,603)	(8,921)
Total other expense	(20,323)	(5,735)	(42,406)	(7,447)
Income before income taxes	57,804	33,212	117,619	55,999
Income tax expense	7,887	11,284	20,957	23,255
Net income	49,917	21,928	96,662	32,744
Net loss attributable to noncontrolling interests	(437)	(656)	(718)	(578)
Net income attributable to Tidewater Inc.	$ 50,354	$ 22,584	$ 97,380	$ 33,322
Basic income per common share (in dollars per share)	$ 0.96	$ 0.44	$ 1.85	$ 0.66
Diluted income per common share (in dollars per share)	$ 0.94	$ 0.43	$ 1.83	$ 0.64
Weighted average common shares outstanding (in shares)	52,684	50,857	52,502	50,731
Dilutive effect of warrants, restricted stock units and stock options (in shares)	663	1,148	640	1,260
Adjusted weighted average common shares (in shares)	53,347	52,005	53,142	51,991
Vessel [Member]
Revenues:
Revenue	$ 337,003	$ 210,323	$ 655,689	$ 401,503
Product and Service, Other [Member]
Revenues:
Revenue	$ 2,227	$ 4,638	$ 4,705	$ 6,562