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CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 3 months ended Mar. 31, 2018 - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Accumulated Deficit [Member]
Stockholders' Equity [Member]
Noncontrolling Interest [Member]
Balances at beginning of period at Dec. 31, 2017 $ 1,530,291 $ 1,913 $ 4,126,549 $ (56,440) $ (2,541,294) $ 1,530,728 $ (437)
Balances at beginning of period (in shares) at Dec. 31, 2017 191,275,928 191,276,000          
Compensation expense related to restricted stock grants $ 8,406   8,406     8,406  
Net income (loss) (457,234)       (457,188) (457,188) (46)
Issuance of common stock under Associate Stock Purchase Plan 372 $ 1 371     372  
Issuance of common stock under Associate Stock Purchase Plan (in shares)   62,000          
Restricted stock, net   $ 28 (28)        
Restricted stock, net (in shares)   2,841,000          
Shares withheld for employee taxes (2,618) $ (4) (2,614)     (2,618)  
Shares withheld for employee taxes (in shares)   (381,000)          
Other 344   63   281 344  
Balances at end of period at Mar. 31, 2018 $ 1,079,561 $ 1,938 $ 4,132,747 $ (56,440) $ (2,998,201) $ 1,080,044 $ (483)
Balances at end of period (in shares) at Mar. 31, 2018 193,797,698 193,798,000