| X | ||||||||||
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- Definition 
          Percentage of performance shares that vest on the third anniversary of grant date. No definition available. 
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| X | ||||||||||
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- Definition 
          Percentage of stock options vesting per year. No definition available. 
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| X | ||||||||||
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- Definition 
          Percentage of time vested shares granted to directors that vest on first anniversary of grant date. No definition available. 
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| X | ||||||||||
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- Definition 
          Percentage of time vested shares granted to officers that vest on second and fourth anniversary of grant date. No definition available. 
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| X | ||||||||||
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- Definition 
          Share based compensation arrangement by share based payment award maximum term. No definition available. 
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| X | ||||||||||
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- Definition 
          Maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards other than stock options under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). No definition available. 
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| X | ||||||||||
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- Definition 
          Maximum number of shares originally approved for purchase by employees under the Employee Stock Purchase Plan. No definition available. 
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| X | ||||||||||
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- Details 
          
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| X | ||||||||||
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- Definition 
          Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Gross number of share options (or share units) granted during the period. No definition available. 
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| X | ||||||||||
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- Definition 
          Purchase price of common stock expressed as a percentage of its fair market value. No definition available. 
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