Quarterly report pursuant to Section 13 or 15(d)

New Accounting Standards (Details)

v3.8.0.1
New Accounting Standards (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]    
Pension costs included in other (income) expense, net $ 485 $ 263
Restricted cash $ 1,182 $ 8,985