|
Long-Term Debt - Summary of Long-Term Debt Outstanding (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
| Debt Instrument [Line Items] | ||
| Class B Revolving Credit Facility | 132.3 | |
| Class B Term Loan due 2017 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term debt, maturity year | 2017 | 2017 |
| Class C Term Loan due 2018 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term debt, maturity year | 2018 | 2018 |