Employee Benefit Plan (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Benefit Plan [Line Items]
Defined Contribution Plan Employer Discretionary Contribution Shares	84,333	107,728	93,472
Defined Contribution Plan Employer Discretionary Contribution Shares Value	$ 2,045,000	$ 1,835,000	$ 1,108,000
Defined Contribution Plan, Employer Discretionary Contribution Amount	200,000	150,000	334,000
Defined Contribution Plan, Cost Recognized	$ 2,245,000	$ 1,985,000	$ 1,442,000