Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail)

v3.3.1.900
Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Unamortized debt issuance cost $ 19.8 $ 22.0
Convertible Senior Notes [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost   18.2
Term Loan [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost   $ 1.7