CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Revenues:
Total revenues	$ 125,859,000	$ 105,601,000		$ 248,008,000	$ 197,094,000
Costs and expenses:
Vessel operating costs	80,439,000	68,012,000		162,642,000	129,376,000
Costs of other operating revenues	586,000	642,000		1,350,000	3,116,000
General and administrative	23,696,000	24,425,000		50,836,000	47,990,000
Depreciation and amortization	25,038,000	12,785,000		47,970,000	24,802,000
Loss (gain) on asset dispositions, net	494,000	(1,338,000)		(776,000)	(3,257,000)
Asset impairments	0	1,215,000	[1]	0	7,401,000	[1]
Total operating costs and expenses	130,253,000	105,741,000		262,022,000	209,428,000
Operating loss	(4,394,000)	(140,000)		(14,014,000)	(12,334,000)
Other income (expense):
Foreign exchange gain (loss)	11,000	(1,002,000)		(497,000)	(1,350,000)
Equity in net earnings (losses) of unconsolidated companies	95,000	390,000		33,000	(15,049,000)
Interest income and other, net	1,859,000	2,914,000		4,329,000	2,786,000
Interest and other debt costs, net	(7,582,000)	(7,547,000)		(15,318,000)	(15,146,000)
Total other expense	(5,617,000)	(5,245,000)		(11,453,000)	(28,759,000)
Loss before income taxes	(10,011,000)	(5,385,000)		(25,467,000)	(41,093,000)
Income tax expense	5,542,000	5,797,000		11,372,000	9,118,000
Net loss	(15,553,000)	(11,182,000)		(36,839,000)	(50,211,000)
Less: Net income attributable to noncontrolling interests	406,000	(242,000)		851,000	(99,000)
Net loss attributable to Tidewater Inc.	$ (15,959,000)	$ (10,940,000)		$ (37,690,000)	$ (50,112,000)
Basic loss per common share	$ (0.42)	$ (0.44)		$ (1.01)	$ (2.09)
Diluted loss per common share	$ (0.42)	$ (0.44)		$ (1.01)	$ (2.09)
Weighted average common shares outstanding	37,571	25,654		37,369	23,989
Adjusted weighted average common shares	37,571	25,654		37,369	23,989
Vessel Revenues
Revenues:
Total revenues	$ 123,641,000	$ 104,174,000		$ 243,303,000	$ 191,668,000
Other Operating Revenues
Revenues:
Total revenues	$ 2,218,000	$ 1,427,000		$ 4,705,000	$ 5,426,000

[1] Refer to Note (14) for additional information regarding asset impairment charges.