Annual report pursuant to Section 13 and 15(d)

Share-based Compensation - Share-Based Compensation Expense and Related Tax Benefits (Detail)

v3.6.0.2
Share-based Compensation - Share-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Share-based compensation expense $ 3,008 $ 2,241 $ 2,165
Related tax benefits $ 1,191 $ 755 $ 516