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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 4 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2018 | Mar. 31, 2017
Operating activities: |  |  |  |  |
Net loss |  |  | $ (38,726) | $ (171,771) |
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |  |  |
Depreciation and amortization |  |  | 20,131 | 51,332 |
Amortization of deferred drydocking and survey costs |  |  | 206 | 6,961 |
Amortization of debt premiums and discounts |  |  | (715) | (1,856) |
Provision for deferred income taxes |  |  |  | 572 |
Gain on asset dispositions, net |  |  | (6,616) | (10,624) |
Impairment of due from affiliate |  |  |  | 20,083 |
Long-lived asset impairments | [1] |  | 16,777 | 61,132 |
Loss on debt extinguishment |  |  |  | 8,119 |
Changes in investments in, at equity, and advances to unconsolidated companies |  |  | (4,531) | 28,177 |
Compensation expense – stock based |  |  | 3,731 | 13,406 |
Changes in operating assets and liabilities, net: |  |  |  |  |
Trade and other receivables |  |  | 2,312 | 9,088 |
Changes in due to/from affiliate, net |  |  | (2,373) | 28,644 |
Marine operating supplies |  |  | 1,229 | (1,955) |
Other current assets |  |  | 10,305 | 10,893 |
Accounts payable |  |  | (1,259) | (15,174) |
Accrued expenses |  |  | (24,896) | (13,489) |
Accrued property and liability losses |  |  | (176) | 141 |
Other current liabilities |  |  | (4,026) | 1,332 |
Other liabilities and deferred credits |  |  | (1,089) | (2,023) |
Deferred drydocking and survey costs |  |  | (3,414) | (25,968) |
Other, net |  |  | (2,416) | 6,921 |
Net cash provided by (used in) operating activities |  |  | (35,546) | 3,941 |
Cash flows from investing activities: |  |  |  |  |
Proceeds from sales of assets |  |  | 32,742 | 46,115 |
Additions to properties and equipment |  |  | (9,834) | (21,391) |
Cash and cash equivalents from stock based merger |  |  |  | 43,806 |
Net cash provided by investing activities |  |  | 22,908 | 68,530 |
Cash flows from financing activities: |  |  |  |  |
Principal payments on long-term debt |  |  | (1,176) | (105,169) |
Cash payments to General Unsecured Creditors |  |  | (93,719) | (8,377) |
Loss on debt extinguishment |  |  |  | (8,119) |
Cash received for issuance of common stock |  |  | 2 | 3 |
Tax on share-based award |  |  |  | (4,400) |
Other |  |  |  | (2,000) |
Net cash used in financing activities |  |  | (94,893) | (128,062) |
Net change in cash, cash equivalents and restricted cash |  |  | (107,531) | (55,591) |
Cash, cash equivalents and restricted cash at beginning of period |  |  | 560,866 | 453,335 |
Cash, cash equivalents and restricted cash at end of period |  | $ 560,866 | 453,335 | 397,744 |
Cash paid during the year for: |  |  |  |  |
Interest, net of amounts capitalized |  |  | 8,223 | 32,326 |
Income taxes |  |  | 4,654 | 16,828 |
Supplemental disclosure of noncash investing activities: |  |  |  |  |
Merger with GulfMark |  |  |  | 285,492 |
Supplemental disclosure of noncash financing activities: |  |  |  |  |
Common stock issued for GulfMark merger |  |  |  | $ 285,492 |
Predecessor |  |  |  |  |
Operating activities: |  |  |  |  |
Net loss |  | (1,646,909) |  |  | $ (650,011)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |  |  |
Reorganization items (non-cash) |  | 1,368,882 |  |  |
Depreciation and amortization |  | 47,447 |  |  | 167,291
Provision for deferred income taxes |  | (5,543) |  |  | (2,200)
Gain on asset dispositions, net |  | (3,561) |  |  | (24,099)
Long-lived asset impairments | [1] | 184,748 |  |  | 484,727
Changes in investments in, at equity, and advances to unconsolidated companies |  | (4,252) |  |  | (7,613)
Compensation expense – stock based |  | 1,707 |  |  | 3,278
Excess tax liability on stock options exercised |  |  |  |  | 4,927
Changes in operating assets and liabilities, net: |  |  |  |  |
Trade and other receivables |  | 6,286 |  |  | 104,829
Changes in due to/from affiliate, net |  | 1,301 |  |  | 20,829
Marine operating supplies |  | 88 |  |  | 2,285
Other current assets |  | (1,840) |  |  | (12,523)
Accounts payable |  | 8,157 |  |  | (17,531)
Accrued expenses |  | 17,245 |  |  | (18,687)
Accrued property and liability losses |  | (822) |  |  | 262
Other current liabilities |  | (2,337) |  |  | (26,658)
Other liabilities and deferred credits |  | 2,884 |  |  | (2,657)
Other, net |  | 4,932 |  |  | 3,372
Net cash provided by (used in) operating activities |  | (21,587) |  |  | 29,821
Cash flows from investing activities: |  |  |  |  |
Proceeds from sales of assets |  | 2,172 |  |  | 14,797
Additions to properties and equipment |  | (2,265) |  |  | (25,499)
Payments related to novated construction contract |  | 5,272 |  |  |
Refunds from cancelled vessel construction contracts |  |  |  |  | 25,565
Net cash provided by investing activities |  | 5,179 |  |  | 14,863
Cash flows from financing activities: |  |  |  |  |
Principal payments on long-term debt |  | (5,124) |  |  | (10,069)
Cash payments to General Unsecured Creditors |  | (122,806) |  |  |
Other |  | (1,200) |  |  | (6,649)
Net cash used in financing activities |  | (129,130) |  |  | (16,718)
Net change in cash, cash equivalents and restricted cash |  | (145,538) |  |  | 27,966
Cash, cash equivalents and restricted cash at beginning of period |  | 706,404 | $ 560,866 |  | 678,438
Cash, cash equivalents and restricted cash at end of period |  | 560,866 |  |  | 706,404
Cash paid during the year for: |  |  |  |  |
Interest, net of amounts capitalized |  | 1,577 |  |  | 70,687
Income taxes |  | $ 4,740 |  |  | 26,916
Supplemental disclosure of noncash investing activities: |  |  |  |  |
Additions to properties and equipment |  |  |  |  | $ 5,047
[1] | The twelve months ended December 31, 2018, the period August 1, 2017 through December 31, 2017 and the twelve months ended March 31, 2017 included $3.5 million, $2.3 million and $2.2 million respectively, of impairments related to inventory and other non-vessel assets. There were no impairments to non-vessel assets during the period April 1, 2017 through July 31, 2017.

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- Definition The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. + 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 (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585 + Details
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