Employee Benefit Plans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Description Of Employee Participation In Employee Benefit Plans	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	$ 244,000	$ 197,000