Acquisitions | Restructuring Activity (Details) $ in Thousands	6 Months Ended
	Jul. 31, 2017 USD ($)
Severance
Restructuring Activity
Fiscal 2018 restructuring expenses	$ 13,667
Cash payments	(8,967)
Foreign currency translation	182
Balance at July 31, 2017	4,882
Facility Exit Costs
Restructuring Activity
Fiscal 2018 restructuring expenses	3,660
Cash payments	(1,572)
Foreign currency translation	25
Balance at July 31, 2017	2,113
Restructuring costs
Restructuring Activity
Fiscal 2018 restructuring expenses	17,327
Cash payments	(10,539)
Foreign currency translation	207
Balance at July 31, 2017	$ 6,995