XML 27 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Earnings per Share - Common Stock Equivalents Not Included in Computation of Diluted Earnings Per Share (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Stock Options [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 15,000 82,041
Restricted Stock [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 5,601 0
Minimum [Member] | Stock Options [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount $ 14.55 $ 9.19
Minimum [Member] | Restricted Stock [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount $ 8.75 $ 0.00
Maximum [Member] | Stock Options [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount $ 14.55 $ 14.55
Maximum [Member] | Restricted Stock [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount $ 9.18 $ 0.00