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Significant Accounting Policies (Compensation expense related to stock options) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Significant Accounting Policies [Abstract]
Compensation expense	$ 35,249	$ 26,383	$ 75,464	$ 45,778
Income tax benefit	$ 14,079	$ 9,230	$ 28,397	$ 16,853

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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