XML 27 R52.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Taxes - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jul. 12, 2014
Jul. 20, 2013
Jul. 12, 2014
Jul. 20, 2013
Income Tax Disclosure [Abstract]        
Effective income tax rate 36.00% 37.70% 36.70% 38.30%