Long Term Retention Plan (Details Textuals) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended	3 Months Ended			9 Months Ended		3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Aug. 08, 2008	Sep. 30, 2011 Long Term Retention Plan 2008 [Member]	Sep. 30, 2011 Long Term Retention Plan 2009 [Member]	Sep. 30, 2010 Long Term Retention Plan 2009 [Member]	Mar. 31, 2010 Long Term Retention Plan 2009 [Member]	Sep. 30, 2011 Long Term Retention Plan 2009 [Member]	Sep. 30, 2010 Long Term Retention Plan 2009 [Member]	Sep. 30, 2011 Long Term Retention Plan 2010 [Member]	Mar. 31, 2011 Long Term Retention Plan 2010 [Member]	Sep. 30, 2010 Long Term Retention Plan 2010 [Member]	Sep. 30, 2011 Long Term Retention Plan 2010 [Member]	Sep. 30, 2010 Long Term Retention Plan 2010 [Member]	Mar. 31, 2012 Long Term Retention Plan 2011 [Member]	Sep. 30, 2011 Long Term Retention Plan 2011 [Member]	Sep. 30, 2011 Long Term Retention Plan 2011 [Member]	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant-date fair market value of number of shares granted						$ 36.8
Percentage of payment of long term retention plan						66.00%
Share portion of award credited to additional paid-in capital																				$ 11,127	$ 14,504	$ 38,120	$ 78,516
Accrued compensation expense included in social security payable																				16,907	32,019	32,297	103,626
Long Term Retention Plan Payment term									in 8 equal annual quotas (12.5% each) commencing on March 31, 2010				in 8 equal annual quotas (12.5% each) commencing on March 31, 2011				in 8 equal annual quotas (12.5% each) commencing on March 31, 2012
Long Term Retention Plan Each quota calculation term									6.25% of the amount will be calculated in nominal terms (“the nominal basis share”), 6.25% will be adjusted by multiplying the nominal amount by the average closing stock price for the last 60 trading days of the year previous to the payment date and divided by the average closing stock price for the last 60 trading days of 2009 which is $13.81 (“the variable share”).				6.25% of the amount will be calculated in nominal terms (“the nominal basis share”), 6.25% will be adjusted by multiplying the nominal amount by the average closing stock price for the last 60 trading days of the year previous to the payment date and divided by the average closing stock price for the last 60 trading days of 2010 which is $45.75 (“the variable share”).				6.25% of the amount will be calculated in nominal terms (“the nominal basis share”), 6.25% will be adjusted by multiplying the nominal amount by the average closing stock price for the last 60 trading days of the year previous to the payment date and divided by the average closing stock price for the last 60 trading days of 2011 which is $65.41 (“the variable share”).
Long Term Retention Plan (Textuals) [Abstract]
Employee retention program payable in cash					50.00%
Employee retention program payable in shares					50.00%
Long term retention plan	$ 28,034	$ 46,523	$ 70,417	$ 182,142			$ (138,721)	$ 673,842		$ 870,504	$ 1,382,883	$ 46,942		$ 598,709	$ 864,413	$ 1,258,700		$ 287,697	$ 1,049,182