Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Unrecognized Share-Based Compensation Expense (Detail)

v2.4.0.8
Share-Based Compensation - Unrecognized Share-Based Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 4,312
Average Expected Recognition Period 2 years 4 months 24 days
Stock option awards [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense 1,490
Average Expected Recognition Period 2 years 2 months 12 days
Restricted stock awards [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 2,822
Average Expected Recognition Period 2 years 7 months 6 days