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

Earning Per Share (Details Textual) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in computation of earnings per common share	5,794	6,946	9,147
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in computation of earnings per common share	237
Restricted Stock Unit [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in computation of earnings per common share	303	457	337