XML 84 R69.htm IDEA: XBRL DOCUMENT v3.8.0.1

Schedule of Segment Reporting Information, Revenue by Vessel Class (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 87,494
Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 156,905
Americas Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 16,205
Percentage of Angolan operation revenue	19.00%
Americas Fleet Deepwater vessels | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 62,831
Percentage of Angolan operation revenue		40.00%
Americas Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 6,846
Percentage of Angolan operation revenue	8.00%
Americas Fleet Towing-Supply/supply | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 14,738
Percentage of Angolan operation revenue		9.00%
Americas Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 3,030
Percentage of Angolan operation revenue	3.00%
Americas Fleet Other | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 2,964
Percentage of Angolan operation revenue		2.00%
Americas Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 26,081
Percentage of Angolan operation revenue	30.00%
Americas Fleet | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 80,533
Percentage of Angolan operation revenue		51.00%
Middle East/Asia Pacific Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 9,564
Percentage of Angolan operation revenue	11.00%
Middle East/Asia Pacific Fleet Deepwater vessels | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 9,433
Percentage of Angolan operation revenue		6.00%
Middle East/Asia Pacific Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 8,824
Percentage of Angolan operation revenue	10.00%
Middle East/Asia Pacific Fleet Towing-Supply/supply | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 17,245
Percentage of Angolan operation revenue		11.00%
Middle East/Asia Pacific Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 18,388
Percentage of Angolan operation revenue	21.00%
Middle East/Asia Pacific Fleet | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 26,678
Percentage of Angolan operation revenue		17.00%
Europe/Mediterranean Sea fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 9,020
Percentage of Angolan operation revenue	10.00%
Europe/Mediterranean Sea fleet Deepwater vessels | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 9,853
Percentage of Angolan operation revenue		7.00%
Europe/Mediterranean Sea fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 603
Percentage of Angolan operation revenue	1.00%
Europe/Mediterranean Sea fleet Towing-Supply/supply | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 322
Europe/Mediterranean Sea fleet Towing-Supply/supply | Predecessor | Maximum
Segment and Geographic Distribution of Operations [Line Items]
Percentage of Angolan operation revenue		1.00%
Europe/Mediterranean Sea fleet Other | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ (9)
Europe/Mediterranean Sea fleet Other | Predecessor | Maximum
Segment and Geographic Distribution of Operations [Line Items]
Percentage of Angolan operation revenue		1.00%
Europe/Mediterranean Sea fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 9,623
Percentage of Angolan operation revenue	11.00%
Europe/Mediterranean Sea fleet | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 10,166
Percentage of Angolan operation revenue		7.00%
West Africa fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 13,938
Percentage of Angolan operation revenue	16.00%
West Africa fleet Deepwater vessels | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 13,179
Percentage of Angolan operation revenue		8.00%
West Africa fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 16,139
Percentage of Angolan operation revenue	18.00%
West Africa fleet Towing-Supply/supply | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 22,472
Percentage of Angolan operation revenue		15.00%
West Africa fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 3,325
Percentage of Angolan operation revenue	4.00%
West Africa fleet Other | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 3,877
Percentage of Angolan operation revenue		2.00%
West Africa fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 33,402
Percentage of Angolan operation revenue	38.00%
West Africa fleet | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 39,528
Percentage of Angolan operation revenue		25.00%
Worldwide Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 48,727
Percentage of Angolan operation revenue	56.00%
Worldwide Fleet Deepwater vessels | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 95,296
Percentage of Angolan operation revenue		61.00%
Worldwide Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 32,412
Percentage of Angolan operation revenue	37.00%
Worldwide Fleet Towing-Supply/supply | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 54,777
Percentage of Angolan operation revenue		35.00%
Worldwide Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 6,355
Percentage of Angolan operation revenue	7.00%
Worldwide Fleet Other | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 6,832
Percentage of Angolan operation revenue		4.00%
Worldwide Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 87,494
Percentage of Angolan operation revenue	100.00%
Worldwide Fleet | Predecessor
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues		$ 156,905
Percentage of Angolan operation revenue		100.00%

X

- Definition

Sales revenue, services, percentage.

+ References

No definition available.

+ Details

Name:	tdw_SalesRevenueServicesPercentage
Namespace Prefix:	tdw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Segment and Geographic Distribution of Operations [Line Items]

+ References

No definition available.

+ Details

Name:	tdw_SegmentAndGeographicDistributionOfOperationsLineItems
Namespace Prefix:	tdw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_SalesRevenueServicesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_AmericasFleetDeepwaterVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_AmericasFleetTowingSupplyOrSupplyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_AmericasFleetOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_AmericasFleetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_MiddleEastAndAsiaPacificFleetDeepwaterVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_MiddleEastAndAsiaPacificFleetTowingSupplyAndSupplyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_MiddleEastAndAsiaPacificFleetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_EuropeAndMediterraneanSeaFleetDeepwaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_EuropeAndMediterraneanSeaFleetTowingSupplyAndSupplyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_EuropeAndMediterraneanSeaFleetOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_EuropeAndMediterraneanSeaFleetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WestAfricaFleetDeepwaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WestAfricaFleetTowingSupplyAndSupplyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WestAfricaFleetOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WestAfricaFleetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WorldwideFleetDeepwaterVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WorldwideFleetTowingSupplyAndSupplyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WorldwideFleetOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=tdw_WorldwideFleetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: