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Earnings Per Share Reconciliation - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per common share 222,000 1,000,000 186,000 1,000,000