Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Expenses Benefit Disclosure [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	34.00%
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 1,083,000	$ 1,461,000
Operating Loss Carry forwards Expiration Period	expire between 2013 and 2025
Cumulative Effect on Retained Earnings, Tax	6,300,000	6,300,000
Unrecognized Tax Benefits, Income Tax Penalties Expense	46,000	314,000
Unrecognized Tax Benefits, Beginning Balance	1,449,000	926,000	986,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	956,000	611,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	281,000	192,000
Income Tax Examination, Penalties and Interest Expense, Total	89,000	9,000	23,000
Reduction In Unrecognized Tax Benefits	292,000
Unrecognized Tax Benefits Resulting Of Net Operating Loss Carryforward	$ 11,800,000	$ 11,000,000