XML 89 R90.htm IDEA: XBRL DOCUMENT v2.4.0.8
Earnings Per Share - Additional Information (Detail) (Employee Stock Option [Member])
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Stock Option [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Stock options excluded from diluted earnings per share 207,000 274,000 317,000