Condensed Consolidated Statements of Operations (Unuadited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues:
Revenue	$ 193,104	$ 105,729
Costs and expenses:
Vessel operating costs	115,459	68,511
Costs of other operating revenues	1,151	361
General and administrative	23,545	18,217
Depreciation and amortization	30,666	26,657
Long-lived asset impairment and other	0	(500)
Gain on asset dispositions, net	(2,216)	(207)
Total costs and expenses	168,605	113,039
Operating income (loss)	24,499	(7,310)
Other income (expense):
Foreign exchange gain	2,348	946
Interest income and other, net	130	3,486
Interest and other debt costs, net	(4,190)	(4,175)
Total other expense	(1,712)	257
Income (loss) before income taxes	22,787	(7,053)
Income tax expense	11,971	5,218
Net income (loss)	10,816	(12,271)
Net income (loss) attributable to noncontrolling interests	78	(103)
Net income (loss) attributable to Tidewater Inc.	$ 10,738	$ (12,168)
Basic income (loss) per common share (in dollars per share)	$ 0.21	$ (0.29)
Diluted income (loss) per common share (in dollars per share)	$ 0.21	$ (0.29)
Weighted average common shares outstanding (in shares)	50,604	41,412
Dilutive effect of warrants, restricted stock units and stock options (in shares)	1,368	0
Adjusted weighted average common shares (in shares)	51,972	41,412
Vessel [Member]
Revenues:
Revenue	$ 191,180	$ 103,876
Product and Service, Other [Member]
Revenues:
Revenue	$ 1,924	$ 1,853