XML 89 R76.htm IDEA: XBRL DOCUMENT v3.3.1.900
Leases - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Leases Disclosure [Line Items]      
Operating leases rent expense $ 11.5 $ 13.0 $ 14.4