XML 40 R62.htm IDEA: XBRL DOCUMENT v3.3.0.814
Employer Share Plans - Schedule of Share-Based Compensation Awards (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]        
Stock options $ 583 $ 641 $ 1,958 $ 1,956
Restricted stock awards 825 1,184 2,361 2,856
Total stock-based compensation expense $ 1,408 $ 1,825 $ 4,319 $ 4,812