Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Revenues [Abstract]
Total revenues	$ 432,805	$ 376,773	$ 398,157	$ 389,113	$ 456,819	$ 395,233	$ 396,050	$ 365,076	$ 1,596,848	$ 1,613,178	$ 1,485,218
Percent of annual revenues (as percent)	27.10%	23.60%	24.90%	24.40%	28.30%	24.50%	24.60%	22.60%
Cost of goods sold	$ 217,373	$ 192,374	$ 208,869	$ 204,466	$ 240,631	$ 202,901	$ 202,461	$ 187,133	823,082	833,126	777,046
Operating income [Abstract]
Operating income	28,700	16,391	6,351	12,656	25,596	17,916	36,098	34,106	64,098	113,716	119,867
Net income (loss)	$ (74)	$ (3,815)	$ (11,924)	$ (9,749)	$ 1,061	$ (2,421)	$ 16,538	$ 15,677	$ (25,562)	$ 30,855	$ 58,513
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.00	$ (0.12)	$ (0.39)	$ (0.32)	$ 0.03	$ (0.07)	$ 0.45	$ 0.43	$ (0.83)	$ 0.88	$ 1.61
Diluted (in dollars per share)	$ 0.00	$ (0.12)	$ (0.39)	$ (0.32)	$ 0.03	$ (0.07)	$ 0.45	$ 0.43	$ (0.83)	$ 0.87	$ 1.59
Retail Segment [Member]
Revenues [Abstract]
Total revenues	$ 356,198	$ 308,370	$ 332,436	$ 319,036	$ 376,945	$ 323,050	$ 325,605	$ 298,628	$ 1,316,040	$ 1,324,228	$ 1,223,542
Cost of goods sold									823,082	833,126	777,046
Operating income [Abstract]
Operating income	56,096	33,946	35,707	33,663	44,864	36,005	45,124	42,580	159,412	168,573	153,330
Credit Segment [Member]
Revenues [Abstract]
Total revenues	76,607	68,403	65,721	70,077	79,874	72,183	70,445	66,448	280,808	288,950	261,676
Cost of goods sold									0	0	0
Operating income [Abstract]
Operating income	$ (27,396)	$ (17,555)	$ (29,356)	$ (21,007)	$ (19,268)	$ (18,089)	$ (9,026)	$ (8,474)	$ (95,314)	$ (54,857)	$ (33,463)