XML 41 R26.htm IDEA: XBRL DOCUMENT
v3.8.0.1

EMPLOYEE BENEFIT PLANS (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Compensation And Retirement Disclosure [Abstract] |
Schedule of Carrying Value of Trust Assets, Including Unrealized Gains or Losses | The following table summarizes the carrying value of the trust assets, including unrealized gains or losses at March 31, 2018 and December 31, 2017:
|  | Successor |
|  | March 31, |  |  | December 31, |
(In thousands) |  | 2018 |  |  | 2017 |
Investments held in Rabbi Trust at fair value |  | $ | 8,809 |  |  |  | 8,908 |
Unrealized gains (losses) in fair value of trust assets |  |  | (43 | ) |  |  | 256 |
Obligations under the supplemental plan |  |  | 32,581 |  |  |  | 32,508 |
Schedule of Net Periodic Benefit Cost | The net periodic benefit cost for the company’s defined benefit pension plans and supplemental plan (referred to collectively as “Pension Benefits”) and the postretirement health care and life insurance plan (referred to collectively as “Other Benefits”) is comprised of the following components:
|  | Successor |  |  |  | Predecessor |
|  | Quarter Ended |  |  |  | Quarter Ended |
|  | March 31, |  |  |  | March 31, |
(In thousands) |  | 2018 |  |  |  | 2017 |
Pension Benefits: |  |  |  |  |  |  |  |  |
Service cost |  | $ | 30 |  |  |  |  | 419 |
Interest cost |  |  | 902 |  |  |  |  | 991 |
Expected return on plan assets |  |  | (483 | ) |  |  |  | (601 | )
Administrative expenses |  |  | 1 |  |  |  |  | 22 |
Payroll tax of net pension costs |  |  | — |  |  |  |  | 56 |
Amortization of net actuarial losses |  |  | — |  |  |  |  | 32 |
Recognized actuarial loss |  |  | — |  |  |  |  | 447 |
Net periodic pension cost |  | $ | 450 |  |  |  |  | 1,366 |
Other Benefits: |  |  |  |  |  |  |  |  |
Service cost |  | $ | 15 |  |  |  |  | 21 |
Interest cost |  |  | 29 |  |  |  |  | 51 |
Amortization of prior service cost |  |  | (75 | ) |  |  |  | (1,088 | )
Recognized actuarial benefit |  |  | 11 |  |  |  |  | (283 | )
Net periodic postretirement benefit |  | $ | (20 | ) |  |  |  | (1,299 | )

X
- Definition Schedule of Carrying Value of Trust Assets Including Unrealized Gains or Losses. + References No definition available. + Details
Name: | tdw_ScheduleOfCarryingValueOfTrustAssetsIncludingUnrealizedGainsOrLossesTableTextBlock
Namespace Prefix: | tdw_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration