Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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+ Details

Net Income Per Share (Details Textual)	3 Months Ended		9 Months Ended
Net Income Per Share (Details Textual)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Restricted Stock Units (RSUs) [Member]
Net Income Per Share (Textual) [Abstract]
Stock-based compensation expense				53
Stock Options [Member]
Net Income Per Share (Textual) [Abstract]
Stock-based compensation expense	148,560	204,994	181,071	209,706