Commitments and Contingencies - Deferred Acquisition Payments - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Loss Contingencies [Line Items] | ||
| Deferred acquisition payments | $ 10.0 | $ 10.0 |
| Merged Business [Member] | ||
| Loss Contingencies [Line Items] | ||
| Total deferred purchase price acquisition costs | 50.0 | |
| Deferred acquisition payments | 10.0 | $ 10.0 |
| Future payments in 2016 | 15.0 | |
| Future payments in 2017 | $ 15.0 | |