XML 48 R94.htm IDEA: XBRL DOCUMENT v2.4.0.8
Earnings Per Share - Additional Information (Detail)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of stock options outstanding but not included in the computation of diluted earnings per common share 3,483,000 285,000 2,327,000 4,366,422