Annual report pursuant to Section 13 and 15(d)

Restructuring Charges (Details)

v3.8.0.1
Restructuring Charges (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Restructuring and Related Activities [Abstract]      
Termination benefits $ 0 $ 2,398 $ 0
Contract terminations 0 217 0
Other associated costs 0 375 0
Restructuring charges $ 0 $ 2,990 $ 0