Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.5.0.2
Share-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Share-based compensation expense $ 923 $ 494 $ 1,542 $ 1,022
Related tax benefits on non-qualified stock options $ 366 $ 161 $ 604 $ 337
Number of shares, stock options exercised 18,000 6,874 40,209 26,455