|   | 
           | 
      
      
         
         | Share-based Compensation Arrangement by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Roll Forward] | 
      
      
         
         | SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceBasedUnitsVestedAndExpectedToVest | 
      
      
         
         | StockCompensation | 
      
      
         
         | Disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both performance-based awards (or share units) outstanding and performance-based awards (or share units) fully vested and expected to vest at the date of the latest statement of financial position. | 
      
      
         
         | Missing [Table] | 
      
      
         
          | 
      
      
         
         | us-gaap:ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceBasedUnitsVestedAndExpectedToVestTableTextBlock | 
      
      
         
         | List of human readable examples | 
      
      
         
         | List of machine readable examples | 
      
      
         
         | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsStockCompensation | XML | HTML |