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Employee Benefit Plans (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jan. 20, 2011
Defined Benefit Plan Disclosure [Line Items]        
Matching contribution, Amount $ 335 $ 334 $ 282  
Employee Benefit Plans (Textual) [Abstract]        
Minimum Age For IRS Catch Up Provision Limit 50 years      
Accrued pension liabilities       5,623
Severance indemnities paid to the pension fund 1/13.5 of the gross salary      
Pension obligations $ 0      
Vesting percentage 100.00%      
Maximum [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Compensation to the plans 60.00%      
Award for employees 40 years      
Minimum [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Compensation to the plans 1.00%      
Award for employees 25 years