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Earnings per Share - Narrative (Details)	3 Months Ended
Earnings per Share - Narrative (Details)	Mar. 31, 2015	Mar. 31, 2014
Stock Options [Member]
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	9,938,000	8,492,000
Restricted Stock [Member]
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	500,000	600,000
Nonvested shares oustanding	500,000	600,000

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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