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Employee Benefits (Details Textual) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Employee Benefits [Line Items]          
Description Of Employee Participation In Employee Benefit Plans     The LLC sponsors a 401(k) profit sharing and savings plan for its employees. Employee participation in this plan is voluntary and the LLC matches 50% of eligible employee contributions, up to an amount equal to 3% of employee compensation, on a biweekly basis.    
Defined Benefit Plan, Contributions by Plan Participants $ 12,000 $ 16,000 $ 21,000 $ 36,000  
Accrued Liabilities and Other Liabilities, Total         $ 4,180,000