XML 13 R54.htm IDEA: XBRL DOCUMENT v2.4.1.9
Earnings Per Share - Additional Information (Detail)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Antidilutive securities excluded from computation of diluted earnings per common share 479,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 567,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount