Finance Charges and Other Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Summary of the classification of the amounts as Finance charges and other [Abstract]
Interest and Fee Income, Loans, Consumer	$ 69,490	$ 54,502	$ 136,621	$ 115,123
Insurance Commissions and Fees	10,652	11,219	19,982	20,675
Other Revenue, Net	92	437	172	931
Finance charges and other	80,234	66,158	156,775	136,729
Provisions for uncollectible interest	10,500	10,200	20,500	20,200
Financing Receivable [Member]
Summary of the classification of the amounts as Finance charges and other [Abstract]
Interest and Fee Income, Loans, Consumer	$ 4,600	$ 4,200	$ 9,100	$ 8,300