Income Taxes (Details 3) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Income taxes
Alternative minimum tax credit	$ 377,000	$ 542,000
Valuation allowance on deferred tax assets	0
Additional tax benefits reflected in net operating tax loss carryforwards pursuant to SFAS 123R	500,000
Tax effects of windfalls included in net operating loss carryforwards	200,000
Federal
Income taxes
Operating loss carryforwards	103,600,000
Alternative minimum tax credit	300,000
State
Income taxes
Operating loss carryforwards	$ 19,200,000