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Net (Loss) Income Per Share - Additional Information (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Common stock equivalents excluded from the calculation of diluted earnings per share due to decline in market price of stock	620

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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