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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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6510752

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-Name Accounting Standards Codification

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+ Details

Net Income (Loss) Per Common Share (Schedule Of Potentially Dilutive Securities) (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations	13,392	9,503	10,475
Stock Options [Member]
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations	7,038	8,604	10,083
Convertible Notes [Member]
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations	5,050
Stock Appreciation Rights [Member]
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations	884	525
Restricted Stock Units [Member]
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations	374	203	346
Performance Shares [Member]
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations		125
Warrants [Member]
Earnings Per Share [Line Items]
Dilutive common shares excluded from net loss per common share computations	46	46	46