XML 28 R18.htm IDEA: XBRL DOCUMENT v3.5.0.2
Fair Value Measurement - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 25, 2016
Sep. 27, 2015
Sep. 25, 2016
Sep. 27, 2015
Fair Value Disclosures [Abstract]        
Impairment charges $ 1.8 $ 1.0 $ 2.8 $ 1.6