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STOCK-BASED COMPENSATION AND INCENTIVE PLANS (Tables) | 12 Months Ended
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Dec. 31, 2018
Schedule of Common Stock Shares Reserved for Issuance and Shares Available for Grant | The number of common stock shares reserved for issuance under the plans and the number of shares available for future grants are as follows:
|  | Successor |  |  |  | Predecessor |
|  |  |  |  |  | Period from |  |  |  | Period from |  |  |  |  |
|  | Twelve Months |  |  | August 1, 2017 |  |  |  | April 1, 2017 |  |  | Twelve Months |
|  | Ended |  |  | through |  |  |  | through |  |  | Ended |
|  | December 31, 2018 |  |  | December 31, 2017 |  |  |  | July 31, 2017 |  |  | March 31, 2017 |
Shares of common stock reserved for issuance under the plans |  |  | 3,973,228 |  |  |  | 3,048,877 |  |  |  |  | — |  |  |  | 1,900,769 |
Shares of common stock available for future grants |  |  | 2,325,102 |  |  |  | 1,891,231 |  |  |  |  | — |  |  |  | 505,221 |
Effect on Basic and Diluted Earnings Per Share, and Stock Option Compensation Expense | Stock option compensation expense along with the effect on basic and diluted earnings per share are as follows:
|  | Successor |  |  |  | Predecessor |
|  |  |  |  |  | Period from |  |  |  | Period from |  |  |  |  |
|  | Twelve Months |  |  | August 1, 2017 |  |  |  | April 1, 2017 |  |  | Twelve Months |
|  | Ended |  |  | through |  |  |  | through |  |  | Ended |
(In thousands, except per share data) |  | December 31, 2018 |  |  | December 31, 2017 |  |  |  | July 31, 2017 |  |  | March 31, 2017 |
Stock option compensation expense |  | $ | — |  |  |  | — |  |  |  |  | 1,644 |  |  |  | 745 |
Basic loss per share increased by |  |  | — |  |  |  | — |  |  |  |  | 0.02 |  |  |  | 0.02 |
Diluted loss per share increased by |  |  | — |  |  |  | — |  |  |  |  | 0.02 |  |  |  | 0.02 |
Summary of Deferred Stock Unit Activity | The following table sets forth a summary of our deferred stock unit activity:
|  | Weighted-average Grant-Date Fair Value |  |  | Number Of Units |
Balance at April1, 2016 (Predecessor) |  | $ | 23.58 |  |  |  | 363,630 |
Retirement distribution in the twelve month period ended March 31, 2017 |  |  | 6.83 |  |  |  | (12,792 | )
Balance at March 31, 2017 (Predecessor) |  |  | 24.19 |  |  |  | 350,838 |
Retirement distribution for the four month period ended July 31, 2017 |  |  | 24.19 |  |  |  | (350,838 | )
Balance at July 31, 2017 (Predecessor) |  |  | — |  |  |  | — |
Restricted Stock Units (RSUs) |
Summary Of Restricted Stock Unit Activity | The following table sets forth a summary of our restricted stock unit activity:
|  | Weighted-average Grant-Date Fair Value |  |  | Time Based Units |  |  | Weight-average Grant Date Fair Value |  |  | Performance Based Units |
Non-vested balance at April1, 2016 (Predecessor) |  | $ | 49.17 |  |  |  | 89,639 |  |  |  | 61.75 |  |  |  | 156,851 |
Vested |  |  | 49.39 |  |  |  | (76,006 | ) |  |  | — |  |  |  | — |
Cancelled/forfeited |  |  | 49.62 |  |  |  | (13,450 | ) |  |  | 61.75 |  |  |  | (156,851 | )
Non-vested balance at March 31, 2017 (Predecessor) |  |  | 54.48 |  |  |  | 183 |  |  |  | — |  |  |  | — |
Vested |  |  | 54.48 |  |  |  | (183 | ) |  |  | — |  |  |  | — |
Non-vested balance at July 31, 2017 (Predecessor) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Granted |  |  | 24.40 |  |  |  | 1,203,379 |  |  |  | — |  |  |  | — |
Cancelled/forfeited |  |  | 24.15 |  |  |  | (45,733 | ) |  |  | — |  |  |  | — |
Non-vested balance at December 31, 2017 (Successor) |  |  | 24.41 |  |  |  | 1,157,646 |  |  |  | — |  |  |  | — |
Granted |  |  | 24.58 |  |  |  | 455,063 |  |  |  | 26.04 |  |  |  | 63,365 |
Vested |  |  | 24.84 |  |  |  | (503,677 | ) |  |  | — |  |  |  | — |
Cancelled/forfeited |  |  | 27.15 |  |  |  | (27,948 | ) |  |  | — |  |  |  | — |
Non-vested balance at December 31, 2018 (Successor) |  | $ | 24.21 |  |  |  | 1,081,084 |  |  |  | 26.04 |  |  |  | 63,365 |
Schedule of Restricted Stock Compensation Expense and Grant Date Fair Value | Restricted stock unit compensation expense and grant date fair value are as follows:
|  | Successor |  |  |  | Predecessor |
|  |  |  |  |  | Period from |  |  |  | Period from |  |  |  |  |
|  | Twelve Months |  |  | August 1, 2017 |  |  |  | April 1, 2017 |  |  | Twelve Months |
|  | Ended |  |  | through |  |  |  | through |  |  | Ended |
(In thousands) |  | December 31, 2018 |  |  | December 31, 2017 |  |  |  | July 31, 2017 |  |  | March 31, 2017 |
Grant date fair value of restricted stock units vested |  | $ | 12,513 |  |  |  | — |  |  |  |  | 10 |  |  |  | 3,754 |
Restricted stock unit compensation expense |  |  | 13,504 |  |  |  | 3,731 |  |  |  |  | 2 |  |  |  | 2,425 |
Phantom Stock Plan |
Schedule of Restricted Stock Compensation Expense and Grant Date Fair Value | Phantom stock compensation expense and grant date fair value of phantom stock vested are as follows:
|  | Successor |  |  |  | Predecessor |
|  |  |  |  |  | Period from |  |  |  | Period from |  |  |  |  |
|  | Twelve Months |  |  | August 1, 2017 |  |  |  | April 1, 2017 |  |  | Twelve Months |
|  | Ended |  |  | through |  |  |  | through |  |  | Ended |
(In thousands) |  | December 31, 2018 |  |  | December 31, 2017 |  |  |  | July 31, 2017 |  |  | March 31, 2017 |
Grant date fair value of phantom stock vested | $ |  | 2,957 |  |  |  | — |  |  |  |  | — |  |  |  | 7,118 |
Phantom stock compensation expense |  |  | 214 |  |  |  | 94 |  |  |  |  | 68 |  |  |  | 467 |
Summary of Phantom Stock Activity | The following table sets forth a summary of our phantom stock activity:
|  | Weighted-average Grant-Date Fair Value |  |  | Time Based Shares |  |  | Weighted-average Grant-Date Fair Value |  |  | Series A Warrants |  |  | Weighted-average Grant-Date Fair Value |  |  | Series B Warrants |
Non-vested balance at April 1, 2016 (Predecessor) |  | $ | 10.83 |  |  |  | 1,599,829 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested |  |  | 12.29 |  |  |  | (585,426 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cancelled/forfeited |  |  | 13.52 |  |  |  | (68,253 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested balance at March 31, 2017 (Predecessor) |  | $ | 9.74 |  |  |  | 946,150 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cancelled (A) |  |  | 9.70 |  |  |  | (484,446 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited |  |  | 10.08 |  |  |  | (16,866 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested balance at July 31, 2017 (Predecessor) (B) |  | $ | 9.77 |  |  |  | 444,838 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of Successor phantom stock at August 1, 2017(B) |  |  | 308.19 |  |  |  | 14,160 |  |  |  | 1.00 |  |  |  | 22,963 |  |  |  | 0.98 |  |  |  | 24,824 |
Cancelled/forfeited |  |  | 307.31 |  |  |  | (634 | ) |  |  | 1.00 |  |  |  | (1,029 | ) |  |  | 0.98 |  |  |  | (1,112 | )
Non-vested balance at December 31, 2017 (Successor) |  | $ | 308.24 |  |  |  | 13,526 |  |  |  | 1.00 |  |  |  | 21,934 |  |  |  | 0.98 |  |  |  | 23,712 |
Vested |  |  | 360.14 |  |  |  | (8,223 | ) |  |  | 1.00 |  |  |  | (13,009 | ) |  |  | 0.98 |  |  |  | (14,064 | )
Cancelled (A) |  |  | 240.39 |  |  |  | (786 | ) |  |  | 1.00 |  |  |  | (1,275 | ) |  |  | 0.98 |  |  |  | (1,379 | )
Non-vested balance at December 31, 2018 (Successor) |  | $ | 226.50 |  |  |  | 4,517 |  |  |  | 1.00 |  |  |  | 7,650 |  |  |  | 2.94 |  |  |  | 8,269 |
| (A) | Prior to emergence from Chapter 11 bankruptcy, all officer-held phantom stock units were cancelled.
| (B) | Upon emergence from Chapter 11 bankruptcy, all outstanding phantom stock units held by non-officer employees were converted by the same conversion ratio applied to the common shares upon emergence. Every 31.4143 phantom stock units converted into one phantom stock unit post emergence which is valued to the new common stock. In addition, each post emergence phantom stock unit received 1.6216 phantom series A warrants and 1.7531 phantom series B warrants. Both warrant series have time-based vesting and follow the vesting schedule of the underlying phantom stock unit.

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