XML 25 R8.htm IDEA: XBRL DOCUMENT v3.19.1
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY      
Pension adjustment, tax amount $ 95 $ 53 $ 509