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Income Taxes (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of reconciliation of income tax expense
Income tax computed at statutory rate	$ 9,128,915	$ 8,048,057	$ 6,887,483
City and state income taxes, net of federal benefit	344,187	604,423	430,117
Other	(321,379)	(10,999)	(41,519)
Provision for income taxes	$ 9,151,723	$ 8,641,481	$ 7,276,081

X

- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax Income or Loss from continuing operations; income tax expense or benefit may include interest and penalties on tax uncertainties based on the entity's accounting policy.

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