Annual report pursuant to Section 13 and 15(d)

Share-Based Compensations - Summary of Information under Plans (Detail)

v2.4.0.8
Share-Based Compensations - Summary of Information under Plans (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Grant date fair value of options granted $ 1,053 $ 1,197 $ 156
Fair value of options vested 728 911 1,272
Total intrinsic value of options exercised 485 6  
Cash received from options exercised $ 525 $ 10  
Weighted-average estimated fair value per share of options granted $ 4,480 $ 5,400 $ 6,230