CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Vessel revenues		$ 139,361	$ 264,131	$ 301,791	$ 562,444
Other operating revenues		4,361	7,792	9,856	14,253
Total revenues		143,722	271,923	311,647	576,697
Costs and expenses:
Vessel operating costs		87,094	158,612	195,968	337,893
Costs of other operating revenues		3,423	6,102	7,326	11,846
General and administrative		32,954	37,286	70,001	81,239
Vessel operating leases		8,441	8,441	16,882	16,884
Depreciation and amortization		43,845	45,979	88,397	91,636
Gain on asset dispositions, net		(6,253)	(6,111)	(11,896)	(13,462)
Asset impairments	[1]	129,562	31,672	166,448	46,630
Restructuring charge	[2]		7,586		7,586
Total costs and expenses		299,066	289,567	533,126	580,252
Operating loss		(155,344)	(17,644)	(221,479)	(3,555)
Other income (expenses):
Foreign exchange gain (loss)		(2,539)	844	(5,272)	(3,289)
Equity in net earnings (losses) of unconsolidated companies		1,313	(2,919)	1,312	(5,360)
Interest income and other, net		992	355	2,168	1,145
Interest and other debt costs, net		(18,477)	(13,247)	(35,431)	(26,429)
Total other income (expenses)		(18,711)	(14,967)	(37,223)	(33,933)
Loss before income taxes		(174,055)	(32,611)	(258,702)	(37,488)
Income tax expense		3,568	11,388	7,564	21,675
Net Loss		(177,623)	(43,999)	(266,266)	(59,163)
Less: Net income (loss) attributable to noncontrolling interests		867	(164)	1,321	(276)
Net loss attributable to Tidewater Inc.		$ (178,490)	$ (43,835)	$ (267,587)	$ (58,887)
Basic loss per common share	[3]	$ (3.79)	$ (0.93)	$ (5.69)	$ (1.25)
Diluted loss per common share	[4]	$ (3.79)	$ (0.93)	$ (5.69)	$ (1.25)
Weighted average common shares outstanding		47,067,864	46,942,950	47,067,790	46,962,242
Adjusted weighted average common shares		47,067,864	46,942,950	47,067,790	46,962,242

[1] Refer to Note (15) for additional information regarding asset impairment charges.

[2] Refer to Note (14) for additional information regarding the restructuring charge.

[3] The company calculates “Loss per share, basic” by dividing “Net loss available to common shareholders” by “Weighted average outstanding shares of common stock, basic”.

[4] The company calculates “Loss per share, diluted” by dividing “Net loss available to common shareholders” by “Weighted average common stock and equivalents”. As a result of the net losses incurred, the company has excluded the antidilutive effect of incremental share equivalents related to options, restricted stock awards and restricted stock units from the “Loss per share, diluted” calculation for the quarters and six month periods ended September 30, 2016 and 2015.