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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In- Capital | Treasury Stock | Accumulated Deficit | Noncontrolling Interest | Cumulative Effect Period Of Adoption Adjustment Accumulated Deficit
--- | --- | --- | --- | --- | --- | --- | ---
Balances at beginning of period at Dec. 31, 2018 | $ 1,018,413 | $ 1,968 | $ 4,151,147 | $ (64,940) | $ (3,069,272) | $ (490) | $ (55,885)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | (42,606) |  |  |  | (42,595) | (11) |
Compensation expense related to restricted stock grants |  |  | 6,356 |  |  |  |
Issuance of common stock under Associate Stock Purchase Plan |  | 1 | 298 |  |  |  |
Restricted stock, net |  | 35 | (35) |  |  |  |
Shares withheld for employee taxes |  | (4) | (2,993) |  |  |  |
Purchase of treasury stock |  |  |  | (6,000) |  |  |
Other, net |  |  | 17 |  |  |  |
Balances at end of period at Mar. 31, 2019 | 917,597 | $ 2,000 | 4,154,790 | (70,940) | (3,167,752) | (501) |
Balances at beginning of period (in shares) at Dec. 31, 2018 |  | 192,356,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under Associate Stock Purchase Plan (in shares) |  | 50,000 |  |  |  |  |
Restricted stock grants, net (in shares) |  | 3,534,000 |  |  |  |  |
Shares withheld for employee taxes (in shares) |  | (434,000) |  |  |  |  |
Purchase of treasury stock (in shares) |  | (933,000) |  |  |  |  |
Balances at end of period (in shares) at Mar. 31, 2019 |  | 194,573,000 |  |  |  |  |
Balances at beginning of period at Dec. 31, 2019 | 698,725 | $ 1,996 | 4,172,099 | (84,651) | (3,393,088) | 2,369 | $ (115)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | 369,497 |  |  |  | 369,515 | (18) |
Compensation expense related to restricted stock grants |  |  | 5,957 |  |  |  |
Issuance of common stock under Associate Stock Purchase Plan |  | 1 | 168 |  |  |  |
Restricted stock, net |  | (6) | 6 |  |  |  |
Shares withheld for employee taxes |  | (6) | (3,892) |  |  |  |
Purchase of treasury stock |  |  |  | (18,123) |  |  |
Other, net |  |  | 18 |  |  |  |
Balances at end of period at Mar. 31, 2020 | $ 1,052,230 | $ 1,985 | $ 4,174,356 | $ (102,774) | $ (3,023,688) | $ 2,351 |
Balances at beginning of period (in shares) at Dec. 31, 2019 | 192,128,586 | 192,129,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under Associate Stock Purchase Plan (in shares) |  | 61,000 |  |  |  |  |
Restricted stock grants, net (in shares) |  | (504,000) |  |  |  |  |
Shares withheld for employee taxes (in shares) |  | (611,000) |  |  |  |  |
Purchase of treasury stock (in shares) |  | (3,063,000) |  |  |  |  |
Balances at end of period (in shares) at Mar. 31, 2020 | 188,012,169 | 188,012,000 |  |  |  |  |

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