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Earnings (Loss) Per Share - Additional Information (Detail)
Jun. 30, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]    
Redeemable common stock, shares outstanding 5,347,137 5,347,137 [1]
[1] The condensed consolidated balance sheet at December 31, 2012 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.