XML 75 R60.htm IDEA: XBRL DOCUMENT v2.4.1.9
Earnings Per Common Share - Additional Information (Detail)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Antidilutive securities excluded from computation of earnings per share 2.7us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 3.0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount