Quarterly report pursuant to Section 13 or 15(d)

Stock Options and Long Term Incentive Plan - Share-based Compensation (Details)

v2.4.0.8
Stock Options and Long Term Incentive Plan - Share-based Compensation (Details) (USD $)
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Payments of long term incentive plan and phantom stock appreciation rights $ 3,195,000 $ 33,410,000
Incentive Plan, Stock Options and Restricted Stock
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total unrecognized compensation cost for nonvested awards 71,600,000  
Weighted average period for total unrecognized compensation to be recognized over 2 years 9 months 23 days  
Long Term Incentive Plan 2006
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting period 4 years  
Payments of long term incentive plan and phantom stock appreciation rights $ 3,200,000 $ 33,400,000
Tranche 1 [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Future Vesting, Number of Shares 2,666,983.000  
Tranche 2 [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Future Vesting, Number of Shares 3,363,123.000  
Share-based Comepensation, Vesting, Percentage 50.00%  
Restricted Stock [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 304,022  
Award vesting period 4 years