Goodwill and Other Intangibles - Additional Information (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2015 | |
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted-average amortization period for intangibles | 6 years |
| Maximum [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible assets useful lives | 13 years |
| Minimum [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible assets useful lives | 1 year |