Stock-Based Compensation (Stock Option Activities) (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Number of shares
Beginning Balance	27,500	45,000	45,000
Options granted	0		0
Options exercised	0		0
Options expired	(22,500)		(17,500)
Ending Balance	5,000		27,500
Weighted Average Exercise Price per Share
Beginning Balance	$ 12.92	$ 14.75	$ 14.75
Options granted	0		0
Options exercised	0		0
Options expired	(2.62)		(1.83)
Ending Balance	10.30		12.92
Weighted Average Fair Value at Grant Date
Options granted	$ 0		$ 0
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life	1 year 1 month 6 days	1 year 1 month 6 days	1 year 1 month 6 days
Intrinsic Value
Beginning Balance	$ 0	$ 0	$ 0
Options granted	0		0
Options exercised	0		0
Options expired	0		0
Ending Balance	$ 0		$ 0