Stock-Based Compensation - Weighted Average Period for Recognition of Unrecognized Compensation Cost for Stock Options and Restricted Stock (Detail) |
9 Months Ended |
---|---|
Sep. 30, 2015 | |
Stock options [Member] | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Weighted average period | 0 years |
Restricted Stock [Member] | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Weighted average period | 1 year 4 months 24 days |