XML 14 R54.htm IDEA: XBRL DOCUMENT v2.4.0.8
Earnings Per Share - Additional Information (Detail) (Stock Options [Member])
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Stock Options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from diluted earnings per share (in shares) 159,000 242,000 187,000 243,000