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Earnings Per Share - Additional Information (Detail)	12 Months Ended
Earnings Per Share - Additional Information (Detail)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Total number of common equivalent shares excluded from the calculations of diluted earnings per share	70,000	105,000	247,000

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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