CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2019		Jan. 31, 2018	Jan. 31, 2017
Income Statement [Abstract]
Net sales	$ 3,076,208	[1]	$ 2,806,938	$ 2,386,435	[1]
Cost of goods sold	1,969,099		1,752,199	1,545,107
Gross profit	1,107,109		1,054,739	841,328
Selling, general and administrative expenses	834,763		855,247	704,436
Depreciation and amortization	38,819		37,783	32,481
Asset impairments	2,813		7,884	10,480
Operating profit	230,714		153,825	93,931
Other income (loss)	(2,960)		(1,413)	(580)
Interest and financing charges, net	(43,924)		(42,363)	(15,589)
Income before income taxes	183,830		110,049	77,762
Income tax expense	45,763		47,925	25,824
Net income (loss)	$ 138,067		$ 62,124	$ 51,938
Basic:
Net income per common share	$ 2.81		$ 1.27	$ 1.12
Weighted average number of shares outstanding (in shares)	49,140		48,820	46,308
Diluted:
Net income per common share	$ 2.75		$ 1.25	$ 1.10
Weighted average number of shares outstanding (in shares)	50,274		49,750	47,394
Net income	$ 138,067		$ 62,124	$ 51,938
Other comprehensive income:
Foreign currency translation adjustments	(9,672)		22,200	(4,033)
Other comprehensive income (loss)	(9,672)		22,200	(4,033)
Comprehensive income	$ 128,395		$ 84,324	$ 47,905

[1] Certain reclassifications have been made between the wholesale operations segment and the elimination column as a result of sales eliminations within the wholesale operations segment being misclassified as inter-segment eliminations.