XML 48 R38.htm IDEA: XBRL DOCUMENT v3.8.0.1
STOCK-BASED COMPENSATION - Summary of stock-based compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
STOCK-BASED COMPENSATION    
Pre - tax cost $ 516 $ 508
After tax cost $ 402 $ 328