|
Stock Incentive Plan - Summary of Assumptions Used in the Monte Carlo Simulation Model (Detail)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2011
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Volatility | 55.00% | 60.00% |
|
Market-based Restricted Stock Units [Member]
|
||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk-free interest rate | 0.62% | |
| Volatility | 54.00% | |