XML 78 R65.htm IDEA: XBRL DOCUMENT
v3.19.1

Segment Information, Geographical Data and Major Customers (Detail) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | $ 122,149,000 | $ 91,493,000 |
Operating profit (loss) | [1] | 4,310,000 | (1,143,000) |
Corporate expenses | [1],[2] | (15,200,000) | (6,784,000) |
Gain on asset dispositions, net |  | 1,270,000 | 1,919,000 |
Asset impairments |  | 0 | (6,186,000) | [3]
Operating loss |  | (9,620,000) | (12,194,000) |
Depreciation and amortization |  | 22,932,000 | 12,017,000 |
Additions to properties and equipment |  | 3,116,000 | 1,677,000 |
All Other Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | [1] | 1,704,000 | 1,506,000 |
Depreciation and amortization |  | 5,000 | 5,000 |
Operating Segments | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | [1] | (1,030,000) | 4,911,000 |
Depreciation and amortization |  | 6,261,000 | 3,313,000 |
Additions to properties and equipment |  | 398,000 | 1,037,000 |
Operating Segments | Middle East/Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | [1] | (1,162,000) | (2,253,000) |
Depreciation and amortization |  | 4,450,000 | 2,769,000 |
Additions to properties and equipment |  | 1,459,000 | 423,000 |
Operating Segments | Europe/Mediterranean Sea |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | [1] | (3,317,000) | (3,554,000) |
Depreciation and amortization |  | 7,446,000 | 1,804,000 |
Additions to properties and equipment |  | 121,000 |  |
Operating Segments | West Africa Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | [1] | 8,115,000 | (1,753,000) |
Depreciation and amortization |  | 4,444,000 | 4,026,000 |
Additions to properties and equipment |  | 243,000 | 1,000 |
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and amortization |  | 326,000 | 100,000 |
Additions to properties and equipment |  | 895,000 | 216,000 |
Service | Operating Segments | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 35,279,000 | 26,081,000 |
Service | Operating Segments | Middle East/Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 20,456,000 | 18,388,000 |
Service | Operating Segments | Europe/Mediterranean Sea |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 28,558,000 | 9,623,000 |
Service | Operating Segments | West Africa Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 35,369,000 | 33,402,000 |
Other Operating Revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | $ 2,487,000 | $ 3,999,000 |
[1] | Prior to January 1, 2019, we allocated the costs of certain marine operations related to general and administrative functions, such as marine management, engineering, supply chain management, risk management, fleet human resources and health and safety to the segment general and administrative expenses. Beginning on January 1, 2019 our management elected to modify that process in order to better analyze costs and better align the policies of the two combined companies such that all costs related to those previously allocated functions will remain as corporate general and administrative expenses. This change is reflected in the table above for the three month period ended March 31, 2019.
[2] | Included in corporate expenses for the three months ended March 31, 2019 were $3.7 million of merger and integration costs related to the business combination with GulfMark.
[3] | Refer to Note (14) for additional information regarding asset impairment charges.

X
- Definition Corporate expenses + References No definition available. + Details
Name: | tdw_CorporateExpenses
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_GrossProfit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tdw_AmericasSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tdw_MiddleEastAndAsiaPacificSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tdw_EuropeAndMediterraneanSeaSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tdw_WestAfricaSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProductAndServiceOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |