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Share Based Compensation (Details 4) (Restricted and Unrestricted Stock [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Restricted and Unrestricted Stock [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total Shares, Outstanding, Beginning Balance 122 118 109
Weighted Average Grant Date Fair Value, Beginning Balance $ 12.66 $ 12.21 $ 12.00
Total Shares, granted 8 4 9
Weighted Average Grant Date Fair Value, granted $ 13.42 $ 25.16 $ 14.88
Total Shares, vested 4 9  
Weighted Average Grant Date Fair Value, vested $ 25.16 $ 14.88  
Total Shares, forfeited, cancelled or expired 3    
Weighted Average Grant Date Fair Value, forfeited, cancelled or expired $ 13.42    
Total Shares, Outstanding, Ending Balance 127 122 118
Weighted Average Grant Date Fair Value, Ending Balance $ 12.69 $ 12.66 $ 12.21
Vested , Total shares 122    
Vested, Weighted Average Grant Date Fair Value $ 12.66