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Earnings Per Share - Common Shares Related to Stock Options and RSUs Excluded from Calculated Diluted Net Income Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total	2,127	4,577
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total	1,688	4,577
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total	439

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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