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

Earnings Per Share (Details Textual) (USD $)	3 Months Ended		6 Months Ended
Earnings Per Share (Details Textual) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share (Textual) [Abstract]
weighted-average exercise prices	$ 4.67		$ 4.67		$ 4.68	$ 5.84
Earnings Per Share (Additional Textual) [Abstract]
Antidilutive shares not included in computation of earnings per common share	428,286	609,583	580,900	604,583
Anti-dilutive Options Type One [Member]
Earnings Per Share (Textual) [Abstract]
weighted-average exercise prices	$ 4.70	4.97	$ 4.70	$ 4.97
Anti-dilutive Options Type Two [Member]
Earnings Per Share (Textual) [Abstract]
weighted-average exercise prices	$ 6.05	4.93	$ 6.05	$ 4.93