Stock-Based Compensation - Schedule of Assumptions used in Valuing Stock Options Granted (Detail) - Stock Options [Member] |
12 Months Ended | |
---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Expected dividends | 0.00% | 0.00% |
Risk-free interest rate, minimum | 1.30% | 1.10% |
Risk-free interest rate, maximum | 1.90% | 2.00% |
Minimum [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Expected volatility | 26.00% | 27.00% |
Expected life (in years) | 4 years 1 month 6 days | 3 years 1 month 6 days |
Maximum [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Expected volatility | 30.00% | 35.00% |
Expected life (in years) | 6 years 3 months 18 days | 7 years |