XML 36 R28.htm IDEA: XBRL DOCUMENT v2.4.0.8
Earnings Per Share - Additional Information (Detail)
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Convertible Preferred Stock
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, shares 2,665,486 1,964,030
Stock Options
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, shares 228,000