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Employee Benefit Plans (Details Textual) (USD $)
6 Months Ended 12 Months Ended 24 Months Ended
Jun. 30, 2012
Profit sharing plan [Member]
Rate
Dec. 31, 2012
Pension plans, defined benefit [Member]
Dec. 31, 2011
Pension plans, defined benefit [Member]
Dec. 31, 2012
Pension plans, defined benefit [Member]
Employee Benefit Plans (Textual) [Abstract]        
Eligible employee contributions 3.00%      
Defined benefit Plan contributions by employer percent 6.00%      
Contributions to the defined benefit plan   $ 508,000 $ 238,000 $ 746,000
Minimum required contribution   $ 1,048,000   $ 1,048,000