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Stock Plans (Details) (USD $)
0 Months Ended 9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2012
Sep. 30, 2011
All Plans [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total number of stock-based compensation plan 5   5  
Number of stock-based compensation plans under which no further awards may be granted (the EIP) 3   3  
Shares authorized for grant under the plans (in shares) 12,540,761   12,540,761  
Shares available for grant the plans (in shares) 3,112,457   3,112,457  
Performance Shares [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Measurement period     3 years  
Period considered for evaluating performance metrics     90 days  
Number of shares granted (in shares)     930,020  
Expense recognized during the period     $ 300,000  
Restricted Stock [Member]
       
Number of Shares [Roll Forward]        
Balance at beginning of period (in shares)     4,847,000  
Restricted stock granted (in shares)     3,941,000 1,721,000
Restricted stock vested (in shares)     (1,332,000)  
Restricted stock forfeited (in shares)     (289,000)  
Balance at end of period (in shares) 7,167,000   7,167,000  
Weighted Average Grant Date Fair Value [Abstract]        
Balance at beginning of period (in dollars per shares)     $ 8.40  
Restricted stock granted (in dollars per shares)     $ 4.17 $ 9.41
Restricted stock vested (in dollars per shares)     $ 8.84  
Restricted stock forfeited (in dollars per shares)     $ 6.08  
Balance at end of period (in dollars per shares) $ 6.09   $ 6.09  
Aggregate Fair Value [Abstract]        
Balance at beginning of period     24,962,000  
Restricted stock granted     19,390,000 10,500,000
Restricted stock vested     6,554,000 6,900,000
Balance at end of period 35,259,000   35,259,000 29,700,000
Remaining unrecognized compensation cost associated with unvested restricted stock awards 28,900,000   28,900,000  
Weighted average period over which unvested restricted stock awards unrecognized compensation cost is expected to be recognized (in years)     2 years  
Stock Options [Member]
       
Shares Subject to Option [Roll forward]        
Balance at beginning of period (in shares)     895,000  
Options granted (in shares)     0 0
Options exercised (in shares)     0 10,000
Options canceled, forfeited or lapsed (in shares)     (355,000)  
Balance at end of period (in shares) 540,000 895,000 540,000  
Exercisable at end of period (in shares) 540,000 895,000 540,000  
Weighted Average Option Price Per Share [Abstract]        
Balance at beginning of period (in dollars share)     $ 9.94  
Options granted (in dollars per share)     $ 0  
Options exercised (in dollars per share)     $ 0  
Options canceled, forfeited or lapsed (in dollars per share)     $ 8.35  
Balance at end of period (in dollars per share) $ 11.00 $ 9.94 $ 11.00  
Exercisable at end of period (in dollars per share) $ 11.00 $ 9.94 $ 11.00  
Weighted Average Remaining Life in Years [Abstract]        
Balance at beginning of period (in years) 1 year 1 month 6 days 1 year 3 months 18 days    
Balance at end of period (in years) 1 year 1 month 6 days 1 year 3 months 18 days    
Exercisable at end of period (in years) 1 year 1 month 6 days      
Aggregate Intrinsic Value [Abstract]        
Balance at beginning of period     0  
Balance at end of period 0 0 0  
Exercisable at end of period 0   0  
Cash received upon exercise of options during the period       $ 100,000