XML 15 R4.htm IDEA: XBRL DOCUMENT v3.8.0.1
Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]        
Defined benefit pension and other postretirement plans, tax expense (benefit) $ (17) $ 123 $ 169 $ 369