Acquisitions | Restructuring Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Restructuring Activity
Fiscal 2018 restructuring expenses	$ 42,066	$ 0
TS
Restructuring Activity
Fiscal 2018 restructuring expenses	42,066
Restructuring costs
Restructuring Activity
Business Exit Costs	10,345
Cash payments	(4,413)
Foreign currency translation	26
Balance at April 30, 2017	5,958
Severance
Restructuring Activity
Business Exit Costs	10,059
Cash payments	(4,127)
Foreign currency translation	26
Balance at April 30, 2017	5,958
Facility Exit Costs
Restructuring Activity
Business Exit Costs	286
Cash payments	(286)
Foreign currency translation	0
Balance at April 30, 2017	$ 0