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Summary of Vessels Impaired and Amount of Impairment Incurred (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) Vessel | Jun. 30, 2017 USD ($) Vessel | Jun. 30, 2018 USD ($) Vessel | Jun. 30, 2017 USD ($) Vessel
Schedule of Vessels Impaired and Amount of Impairment Incurred [Line Items] |  |  |  |  |
Number of vessels impaired in the period | Vessel | [1] | 2 |  | 15 |
Amount of impairment incurred | $ | [2] | $ 1,215 |  | $ 7,401 |
Predecessor |  |  |  |  |
Schedule of Vessels Impaired and Amount of Impairment Incurred [Line Items] |  |  |  |  |
Number of vessels impaired in the period | Vessel | [1] |  | 77 |  | 89
Amount of impairment incurred | $ | [2] |  | $ 163,423 |  | $ 228,280
[1] | For the quarter and six months periods ended June 30, 2018, there were 2 and 15 stacked vessels impaired, respectively. For the quarter ended June 30, 2017, there were 72 stacked vessels and 5 active vessels impaired, respectively and for the six month period ended June 30, 2017 there were 83 stacked vessels and 6 active vessels impaired, respectively.
[2] | Refer to Note (14) for additional information regarding asset impairment.

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- 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
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