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Loss per Share Disclosure - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Computation of Earnings Per Share [Line Items]
Weighted average shares outstanding on a basic and diluted basis	74,501,559	56,580,155
Weighted average shares related to stock options		22,671

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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