Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Additional Information (Detail)

v2.4.1.9
Earnings Per Share - Additional Information (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Earnings Per Share [Abstract]    
Antidilutive securities excluded from computation of diluted earnings per common share 817,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount