Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Employee Benefit Plans (Details 7)

v2.4.0.6
Share-Based Compensation and Employee Benefit Plans (Details 7) (Management team, Deferred compensation, USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Management team | Deferred compensation
   
Deferred compensation plan    
Maximum percentage of participants' compensation which is deferrable (as a percent) 100.00%  
Balance of the plan which was fully funded $ 7.6 $ 8.2