XML 15 R4.htm IDEA: XBRL DOCUMENT v3.7.0.1
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statement of Comprehensive Income [Abstract]        
Pension liability adjustments, tax $ (97) $ (133) $ (111) $ (304)