Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information Operating Leases (Detail)

v3.3.1.900
Commitments and Contingencies - Additional Information Operating Leases (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]      
Deferred rent $ 4.3 $ 3.1  
Rental expense $ 17.8 $ 16.7 $ 15.7