Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Long-Term Debt - Schedule of Long-Term Debt (Detail) (Parenthetical) - USD ($)
$ in Millions
1 Months Ended
Feb. 15, 2017
Dec. 31, 2016
Subsequent Event [Line Items]    
Senior secured credit facility, outstanding balance   $ 410.0
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Repayment of senior secured credit facility $ 410.0