Finance Charges and Other Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Interest income and fees	$ 81,843	$ 84,017
Insurance income	4,752	7,314
Other revenues	235	202
Provisions for uncollectible interest	20,100	12,300
Other Income	86,830	91,533
Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Interest income and fees	$ 9,500	$ 8,100