Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Revenue	$ 1,345,835	$ 1,009,985	$ 647,684
Costs and expenses:
Vessel operating costs	693,107	556,515	397,301
Costs of other operating revenues	3,555	4,342	2,130
General and Administrative Expense	110,817	95,283	101,921
Depreciation and amortization	242,770	180,331	119,160
Gain on asset dispositions, net	(15,762)	(8,701)	(250)
Long-lived asset impairments and other	0	0	714
Total costs and expenses	1,034,487	827,770	620,976
Operating income	311,348	182,215	26,708
Other income (expense):
Foreign exchange loss	(15,276)	(1,370)	(2,827)
Equity in net earnings (losses) of unconsolidated companies	0	39	(221)
Interest Income (Expense), Nonoperating	6,383	6,517	5,397
Loss on warrants	0	0	(14,175)
Interest and other debt costs, net	(72,967)	(48,472)	(17,189)
Total other expense	(81,860)	(43,286)	(29,015)
Income (loss) before income taxes	229,488	138,929	(2,307)
Income tax expense	50,216	43,308	19,886
Net income (loss)	179,272	95,621	(22,193)
Less: Net losses attributable to noncontrolling interests	(1,384)	(1,564)	(444)
Net income (loss) attributable to Tidewater Inc.	$ 180,656	$ 97,185	$ (21,749)
Basic income (loss) per common share (in dollars per share)	$ 3.44	$ 1.88	$ (0.49)
Diluted income (loss) per common share (in dollars per share)	$ 3.4	$ 1.84	$ (0.49)
Weighted average common shares outstanding (in shares)	52,452	51,591	44,132
Dilutive effect of warrants, restricted stock units and stock options (in shares)	619	1,346	0
Adjusted weighted average common shares (in shares)	53,071	52,937	44,132
Vessel [Member]
Revenues:
Revenue	$ 1,337,637	$ 998,993	$ 641,404
Product and Service, Other [Member]
Revenues:
Revenue	$ 8,198	$ 10,992	$ 6,280