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Earnings Per Share - Additional Information (Detail)	3 Months Ended	9 Months Ended
Earnings Per Share - Additional Information (Detail)	Sep. 30, 2014	Sep. 30, 2014
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock not included in the computation of diluted share	0	0
ASR Program [Member]
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share repurchase, common stock shares	5,567,154

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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