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Consolidated Statements of Changes in Stockholders Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands | Total | Convertible Perpetual Preferred Stock | Common Stock | Warrants | Additional Paid-In Capital | Treasury Stock | Accumulated Deficit | Non-controlling Interest
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance (in shares) (Predecessor) at Dec. 31, 2015 |  | 5,420 |  |  |  |  |  |
Beginning Balance (in shares) (Predecessor) at Dec. 31, 2015 |  |  | 633,471 |  |  |  |  |
Beginning Balance (Predecessor) at Dec. 31, 2015 | $ (1,187,733) | $ 6 | $ 630 |  | $ 5,299,886 | $ (5,742) | $ (6,992,697) | $ 510,184
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Common stock issued for debt (in shares) | Predecessor |  |  | 84,390 |  |  |  |  |
Common stock issued for debt | Predecessor | 4,409 |  | $ 84 |  | 4,325 |  |  |
Stock distributions, net of purchases - retirement plans (in shares) | Predecessor |  |  | 603 |  |  |  |  |
Stock distributions, net of purchases - retirement plans | Predecessor | (336) |  |  |  | (860) | 524 |  |
Stock-based compensation | Predecessor | 11,102 |  |  |  | 11,102 |  |  |
Cash paid for tax withholdings on vested stock awards | Predecessor | (44) |  |  |  | (44) |  |  |
Cancellations of restricted stock awards, net (in shares) | Predecessor |  |  | (2,184) |  |  |  |  |
Cancellations of restricted stock awards, net of issuance | Predecessor | 0 |  | $ 2 |  | (2) |  |  |
Common stock issued for conversion of securities (in shares) | Predecessor |  | (173) | 2,220 |  |  |  |  |
Common stock issued for conversion of securities | Predecessor | 0 |  | $ 2 |  | (2) |  |  |
Net (loss) income | Predecessor | 1,440,797 |  |  |  |  |  | 1,440,797 |
Convertible perpetual preferred stock dividends | Predecessor | (16,321) |  |  |  |  |  | (16,321) |
Ending Balance (in shares) (Predecessor) at Oct. 01, 2016 |  | 0 |  |  |  |  |  |
Ending Balance (in shares) (Predecessor) at Oct. 01, 2016 |  |  | 0 | 0 |  |  |  |
Ending Balance (in shares) (Successor) at Oct. 01, 2016 |  |  | 18,932 | 6,442 |  |  |  |
Ending Balance (Predecessor) at Oct. 01, 2016 | 0 | $ 0 | $ 0 | $ 0 | 0 | 0 | 0 | 0
Ending Balance (Successor) at Oct. 01, 2016 | 827,424 |  | $ 19 | $ 88,382 | 739,023 |  | 0 |
Beginning Balance (in shares) (Predecessor) at Sep. 30, 2016 |  | 5,247 |  |  |  |  |  |
Beginning Balance (in shares) (Predecessor) at Sep. 30, 2016 |  |  | 718,500 |  |  |  |  |
Beginning Balance (Predecessor) at Sep. 30, 2016 | (1,250) | $ 6 | $ 718 |  | 5,314,405 | (5,218) | (5,311,140) | (21)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of common stock (in shares) | Predecessor |  |  | 18,932 |  |  |  |  |
Issuance of common stock | Predecessor | 575,163 |  | $ 19 |  | 575,144 |  |  |
Issuance of Successor warrants (in shares) | Predecessor |  |  |  | 6,442 |  |  |  |
Issuance of Successor warrants | Predecessor | 88,382 |  |  | $ 88,382 |  |  |  |
Convertible note premium | Predecessor | 163,879 |  |  |  | 163,879 |  |  |
Ending Balance (in shares) (Predecessor) at Oct. 01, 2016 |  | 0 |  |  |  |  |  |
Ending Balance (in shares) (Predecessor) at Oct. 01, 2016 |  |  | 0 | 0 |  |  |  |
Ending Balance (in shares) (Successor) at Oct. 01, 2016 |  |  | 18,932 | 6,442 |  |  |  |
Ending Balance (Predecessor) at Oct. 01, 2016 | 0 | $ 0 | $ 0 | $ 0 | 0 | 0 | 0 | 0
Ending Balance (Successor) at Oct. 01, 2016 | 827,424 |  | $ 19 | 88,382 | 739,023 |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Cancellation of Predecessor equity (in shares) | Predecessor |  | (5,247) | (718,500) |  |  |  |  |
Cancellation of Predecessor equity | Predecessor | 1,250 | $ (6) | $ (718) |  | (5,314,405) | $ 5,218 | 5,311,140 | $ 21
Issuance of stock awards, net of cancellations (in shares) | Successor |  |  | 10 |  |  |  |  |
Issuance of stock awards, net of cancellations | Successor | 0 |  | $ 0 |  | 0 |  |  |
Common stock issued for debt (in shares) | Successor |  |  | 693 |  |  |  |  |
Common stock issued for debt | Successor | 13,001 |  | $ 1 |  | 13,000 |  |  |
Stock-based compensation | Successor | 6,581 |  |  |  | 6,581 |  |  |
Cash paid for tax withholdings on vested stock awards | Successor | (110) |  |  |  | (110) |  |  |
Common stock issued for conversion of securities | Successor | 3 |  |  | $ (1) | 4 |  |  |
Net (loss) income | Successor | (333,982) |  |  |  |  |  | (333,982) |
Ending Balance (in shares) (Successor) at Dec. 31, 2016 |  |  | 19,635 | 6,442 |  |  |  |
Ending Balance (Successor) at Dec. 31, 2016 | 512,917 |  | $ 20 | $ 88,381 | 758,498 |  | (333,982) |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of stock awards, net of cancellations (in shares) | Successor |  |  | 1,583 |  |  |  |  |
Issuance of stock awards, net of cancellations | Successor | 0 |  | $ 2 |  | (2) |  |  |
Common stock issued for debt (in shares) | Successor |  |  | 14,328 |  |  |  |  |
Common stock issued for debt | Successor | 268,779 |  | $ 14 |  | 268,765 |  |  |
Stock-based compensation | Successor | 17,912 |  |  |  | 17,912 |  |  |
Cash paid for tax withholdings on vested stock awards | Successor | (6,730) |  |  |  | (6,730) |  |  |
Issuance of common stock (in shares) | Successor |  |  | 104 |  |  |  |  |
Issuance of common stock | Successor | 0 |  |  |  |  |  |  |
Net (loss) income | Successor | 47,062 |  |  |  |  |  | 47,062 |
Issuance of Successor warrants (in shares) | Successor |  |  |  | 128 |  |  |  |
Issuance of Successor warrants | Successor | $ 0 |  |  | $ 119 | (119) |  |  |
Ending Balance (in shares) (Successor) at Dec. 31, 2017 |  |  | 35,650 | 6,570 |  |  |  |
Ending Balance (in shares) at Dec. 31, 2017 | 35,650 |  |  |  |  |  |  |
Ending Balance (Successor) at Dec. 31, 2017 | $ 839,940 |  | $ 36 | $ 88,500 | 1,038,324 |  | (286,920) |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of stock awards, net of cancellations (in shares) | Successor |  |  | 9 |  |  |  |  |
Issuance of stock awards, net of cancellations | Successor | 0 |  | $ 0 |  | 0 |  |  |
Common stock issued for debt | Successor | 0 |  |  |  |  |  |  |
Stock-based compensation | Successor | 24,276 |  |  |  | 24,276 |  |  |
Cash paid for tax withholdings on vested stock awards | Successor | (7,420) |  |  |  | (7,420) |  |  |
Issuance of common stock (in shares) | Successor |  |  | 28 |  |  |  |  |
Issuance of common stock | Successor | 0 |  |  |  |  |  |  |
Net (loss) income | Successor | (9,075) |  |  |  |  |  | (9,075) |
Issuance of Successor warrants (in shares) | Successor |  |  |  | 34 |  |  |  |
Issuance of Successor warrants | Successor | $ 0 |  |  | $ 16 | (16) |  |  |
Ending Balance (in shares) (Successor) at Dec. 31, 2018 |  |  | 35,687 | 6,604 |  |  |  |
Ending Balance (in shares) at Dec. 31, 2018 | 35,687 |  |  |  |  |  |  |
Ending Balance (Successor) at Dec. 31, 2018 | $ 847,721 |  | $ 36 | $ 88,516 | $ 1,055,164 |  | $ (295,995) |

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