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Executive Benefit Agreements and Employee Savings Plans (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Death Benefit 1981 Agreements [Member]
Installment
Dec. 31, 2011
Death Benefit 1992 Agreements [Member]
Installment
Dec. 31, 2011
Death Benefit 2005 Agreement [Member]
Executive Benefit Agreements and Employee Savings Plans (Textual) [Abstract]          
Number of equal monthly installments to be paid to the beneficiary under Agreements     120 120  
Total monthly installments under 1981 Agreements     $ 34,000    
Minimum amount payable in monthly installments when the employee reaches age 65 under 1992 Agreements       16,000  
Maximum amount payable in monthly installments when the employee reaches age 65 under 1992 Agreements       18,000  
Amount paid to CEO's designated beneficiary under 2005 Agreement         2,500,000
Minimum amount of life insurance policies to be kept by the company for 2005 Agreement         2,500,000
Face value of life insurance policies for CEO $ 21,522,000 $ 21,522,000     $ 7,000,000