XML 38 R36.htm IDEA: XBRL DOCUMENT v3.3.0.814
Income Taxes - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Tax Disclosure [Abstract]        
Effective tax rate 22.80% 34.70% 23.70% 35.30%