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Pension and Employee Benefit Plans (Details Textual) (USD $)
 3 Months Ended
Mar. 31, 2013
Age
Pension and Employee Benefit Plans (Textual) [Abstract]  
Effective date of retirement for availing post retirement health care plan Jan. 01, 1990
Minimum age for the retirees to elect desired health care plan 65
Defined benefit plan contributions $ 21,000
Pension plan [Member]
  
Pension and Employee Benefit Plans (Textual) [Abstract]  
Anticipated contribution to fund the pension plan during the reminder of the fiscal year 186,000
Health care plan [Member]
  
Pension and Employee Benefit Plans (Textual) [Abstract]  
Anticipated contribution to fund the pension plan during the reminder of the fiscal year $ 15,000