Finance Charges and Other Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Summary of the classification of the amounts as Finance charges and other [Abstract]
Interest and Fee Income, Loans, Consumer	$ 74,144	$ 58,404	$ 210,765	$ 173,527
Insurance Commissions and Fees	7,125	9,999	27,107	30,674
Other Revenue, Net	95	337	267	1,268
Finance charges and other	81,364	68,740	238,139	205,469
Provisions for uncollectible interest	10,500	11,000	31,000	31,200
Financing Receivable [Member]
Summary of the classification of the amounts as Finance charges and other [Abstract]
Interest and Fee Income, Loans, Consumer	$ 4,800	$ 4,400	$ 14,000	$ 12,700