Stock-Based Compensation (Stock Option Activities) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of shares
Beginning Balance	45,000	45,600
Options granted	0	0
Options exercised	0	0
Options expired	(17,500)	(600)
Ending Balance	27,500	45,000	45,600
Weighted Average Exercise Price per Share
Beginning Balance	$ 14.75	$ 14.8
Options granted	$ 0	$ 0
Options exercised	$ 0	$ 0
Options expired	$ (1.83)	$ (0.05)
Ending Balance	$ 12.92	$ 14.75	$ 14.8
Weighted Average Fair Value at Grant Date
Options granted	$ 0	$ 0
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life	4 months 24 days	4 months 24 days	4 months 24 days
Intrinsic Value
Beginning Balance	$ 0	$ 0
Options granted	0	0
Options exercised	0	0
Options expired	0	0
Ending Balance	$ 0	$ 0	$ 0