CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017		Jan. 31, 2016
Income Statement [Abstract]
Net sales	$ 2,806,938	$ 2,386,435	[1]	$ 2,344,142
Cost of goods sold	1,752,033	1,545,574		1,505,504
Gross profit	1,054,905	840,861		838,638
Selling, general and administrative expenses	855,247	704,436		628,762
Depreciation and amortization	37,783	32,481		25,392
Asset impairments	7,884	10,480
Operating profit	153,991	93,464		184,484
Other income (loss)	(454)	(27)		1,340
Interest and financing charges, net	(43,488)	(15,675)		(6,691)
Income before income taxes	110,049	77,762		179,133
Income tax expense	47,925	25,824		64,800
Net income	$ 62,124	$ 51,938		$ 114,333
Basic:
Net income per common share	$ 1.27	$ 1.12		$ 2.52
Weighted average number of shares outstanding	48,820	46,308		45,328
Diluted:
Net income per common share	$ 1.25	$ 1.10		$ 2.46
Weighted average number of shares outstanding	49,750	47,394		46,512
Net income	$ 62,124	$ 51,938		$ 114,333
Other comprehensive income (loss):
Foreign currency translation adjustments	22,200	(4,033)		(13,584)
Other comprehensive income (loss)	22,200	(4,033)		(13,584)
Comprehensive income	$ 84,324	$ 47,905		$ 100,749

[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.