Other Noncurrent Assets - Schedule of Other Noncurrent Assets (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Disclosure Other Non Current Assets Schedule Of Other Non Current Assets [Abstract] | ||
| Pension asset | $ 0.6 | $ 0.4 |
| Deferred financing costs, net | 0.4 | 1.0 |
| Other | 1.2 | 1.7 |
| Total | $ 2.2 | $ 3.1 |