Annual report pursuant to Section 13 and 15(d)

Common Stock and Stockholders' Equity - Additional Information (Detail)

v2.4.0.8
Common Stock and Stockholders' Equity - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Performance Units [Member]
Dec. 31, 2012
Performance Units [Member]
Dec. 31, 2011
Performance Units [Member]
Dec. 31, 2013
Nonvested RSUs [Member]
Sep. 17, 2012
Chief Executive Officer [Member]
Sep. 17, 2012
Chief Financial Officer [Member]
Dec. 31, 2013
2010 Long-Term Incentive Plan [Member]
Dec. 31, 2013
2010 Long-Term Incentive Plan [Member]
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Common stock granted                   11,000,000  
Share-based awards vesting period 3 years                    
Restricted stock units, granted (in shares)               349,651 261,438    
Restricted shares to selected key personnel   1,558,347                  
Compensation expense related to the performance units $ 9.4 $ 7.2 $ 5.9 $ 1.8 $ 0.5 $ 2.1          
Total fair value of the shares vested 7.4 5.2 6.9                
Weighted-average grant-date fair value of shares granted (in usd per share) $ 4.77 $ 5.37 $ 5.61                
Non-vested restricted stock awards and restricted stock units (in shares)   2,812,482         3,408,355        
Total unrecognized compensation cost of unamortized non-vested stock awards             $ 8.4        
Weighted-average vesting period             20 months 24 days        
Performance units under 2010 Long Term Incentive Plan (in shares) 2,602,973     18,000 38,429            
Performance units forfeited (in shares) 370,727     13,358 3,955            
Nominal value       $ 100.00              
Performance at the maximum level       3 years              
Performance period - awards percentage       200.00%              
Stock option outstanding or exercisable (in shares) 0 0                 5,130,182
Treasury stock shares (in shares) 668,897 1,709,963