Provision For Income Taxes (Schedule Of Provision For Income Taxes And Income Tax Computed At The Statutory Rate) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Provision For Income Taxes [Abstract]
Federal income tax expense computed at the statutory rate			$ 2,390,034	$ 1,814,484
Federal income tax expense computed at the statutory rate, percentage			34.00%	34.00%
State and local tax expense, net			667,804	506,988
State and local tax expense, percentage			9.50%	9.50%
U.S. domestic manufacturers' discount & other permanent differences			(368,403)	(146,938)
U.S. domestic manufacturers' discount & other permanent differences, percentage			(5.20%)	(2.80%)
Change in tax estimate			(206,219)	(59,169)
Change in tax estimate, percentage			(2.90%)	(1.10%)
Provision for income taxes, percentage			35.40%	39.60%
Provision for income taxes	$ 657,697	$ 441,989	$ 2,483,216	$ 2,115,365