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Stock-Based Compensation (Disclosure of Share Based Compensation Arrangements by Share Based Payment Award) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Outstanding Begninng Balance- shares	171,378	171,378
Outstanding Beginning Balance- weighted average exercise price	$ 10.01	$ 10.01
Granted- shares		27,784	27,784	38,203
Granted- weighted average exercise price		$ 9.64	$ 9.11	$ 8.53
Exercised- shares		(15,588)	(42,495)
Exercised- Weighted Average Exercise Price		$ 8.98
Outstaning Ending Balance- shares		183,574	171,378
Outstanding Ending Balance- weighted average exercise price		$ 9.92	$ 10.01
Outstanding Ending Balance- weighted average remaining contractual term (years)	6 years 0 months 15 days
Outstanding Ending Balance- aggregate intrinsic value		$ 360,678
Exercisable- shares		117,111
Exercisable- weighted average exercise price		$ 10.42
Exercisable- weighed average remaining contractual term (years)	4 years 9 months 15 days
Exercisable- aggregate intrinsic value		$ 189,187

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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