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Earnings Per Share - Potentially Dilutive Securities Earnings Per Share (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Antidilutive securities excluded from computation of EPS	1,384,000	1,384,000

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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