XML 61 R51.htm IDEA: XBRL DOCUMENT v3.19.1
Restructuring Charges Restructuring Charges (textuals) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Restructuring Charges [Abstract]      
Restructuring Charges $ 1,523 $ 4,413 $ 4,400