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 $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share (Textual) [Abstract]
Stock based awards excluded from the calculation of diluted earnings per share	8,202	6,429	5,382
2006 Notes [Member]
Earnings Per Share (Textual) [Abstract]
Conversion price of debt issued	10.63
2010 Notes [Member]
Earnings Per Share (Textual) [Abstract]
Conversion price of debt issued	7.41