XML 39 R28.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share Based Payments (Details 2) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Cash proceeds from stock options exercised $ 1,003 $ 542
Tax benefits 157 135
Intrinsic value of stock options exercised $ 897 $ 549