Charges and Credits (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Charges and Credits [Abstract]
RegulatoryMatterandOtherLegalFee	$ 0	$ 0	$ 0	$ (695)
Professional Fees, Charges and Credits	1,534	0	3,589	0
Charges and credits	$ 1,534	$ 0	$ 3,589	$ (695)

Amount of other expense (income) that is infrequent in occurrence or unusual in nature.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233

Name:	us-gaap_OtherNonrecurringIncomeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration