Fair value (Tables)

6 Months Ended

Jul. 31, 2019

Fair Value Disclosures [Abstract]

Assets measured at fair value on a recurring basis

The following table summarizes the assets measured at fair value on a recurring basis and indicates the level within the fair value hierarchy reflecting the valuation techniques utilized to determine fair value:

	July 31, 2019
(in thousands)	Level 1		Level 2		Level 3
Other investments:
Marketable equity securities	$	81,130	$	—	$	—