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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2018 | Dec. 31, 2017
Accounting Policies [Abstract] |  |
Summaries of Net Properties and Equipment | A summary of net properties and equipment at June 30, 2018 and December 31, 2017 is as follows:
|  | Successor |
(In thousands) |  | June 30, 2018 |  |  | December 31, 2017 |
Properties and equipment: |  |  |  |  |  |  |  |
Vessels and related equipment |  | $ | 836,773 |  |  |  | 850,268 |
Other properties and equipment |  |  | 5,481 |  |  |  | 5,710 |
|  |  | 842,254 |  |  |  | 855,978 |
Less accumulated depreciation and amortization |  |  | 38,529 |  |  |  | 18,458 |
Net properties and equipment |  | $ | 803,725 |  |  |  | 837,520 |
| The following are summaries of net properties and equipment:
|  | Successor |  |  | Predecessor |
(In thousands) |  | December 31, 2017 |  |  | March 31, 2017 |
Properties and equipment: |  |  |  |  |  |  |  |
Vessels and related equipment |  | $ | 850,268 |  |  | $ | 3,407,760 |
Other properties and equipment |  |  | 5,710 |  |  |  | 69,670 |
|  |  | 855,978 |  |  |  | 3,477,430 |
Less accumulated depreciation and amortization |  |  | 18,458 |  |  |  | 612,668 |
Net properties and equipment |  | $ | 837,520 |  |  | $ | 2,864,762 |
|  | Successor |  |  | Predecessor |
|  | December 31, 2017 |  |  | March 31, 2017 |
|  | Number Of Vessels (B) |  |  | Carrying Value |  |  | Number Of Vessels (B) |  |  | Carrying Value |
|  |  |  |  | (In thousands) |  |  |  |  |  | (In thousands) |
Owned vessels in active service |  |  | 138 |  |  | $ | 632,978 |  |  |  | 143 |  |  | $ | 1,990,049 |
Stacked vessels |  |  | 89 |  |  |  | 189,710 |  |  |  | 101 |  |  |  | 793,606 |
Marine equipment and other assets under construction |  |  |  |  |  |  | 9,501 |  |  |  |  |  |  |  | 53,611 |
Other property and equipment (A) |  |  |  |  |  |  | 5,331 |  |  |  |  |  |  |  | 27,496 |
Totals |  |  | 227 |  |  | $ | 837,520 |  |  |  | 244 |  |  | $ | 2,864,762 |
(A) | Other property and equipment at March 31, 2017 includes eight remotely operated vehicles, all of which were sold in December 2017.
(B) | Vessel count excludes vessels operated under sale leaseback agreements.
Current and Long-Term Liabilities Related to Accrued Property and Liability Losses |  | The following table discloses the total amount of current and long-term liabilities related to accrued property and liability losses not subject to reinsurance recoverability, but considered payable:
|  | Successor |  |  | Predecessor |
(In thousands) |  | December 31, 2017 |  |  | March 31, 2017 |
Accrued property and liability losses |  | $ | 5,056 |  |  |  | 13,792 |

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