XML 48 R45.htm IDEA: XBRL DOCUMENT v3.2.0.727
Earnings Per Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Earnings Per Share [Abstract]        
Average number of anti-dilutive options excluded from the calculation of diluted earnings per share 21,959 16,097 33,734 8,049