CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Income Statement [Abstract]
Net sales	$ 538,006	$ 442,267	$ 1,067,048	$ 899,670
Cost of goods sold	335,115	286,624	662,301	578,358
Gross profit	202,891	155,643	404,747	321,312
Selling, general and administrative expenses	195,849	153,168	393,260	306,273
Depreciation and amortization	10,736	7,672	20,574	14,865
Operating profit (loss)	(3,694)	(5,197)	(9,087)	174
Equity income (loss) in unconsolidated affiliates		348	(1,152)	617
Interest and financing charges, net	(9,639)	(1,056)	(19,588)	(2,298)
Loss before income taxes	(13,333)	(5,905)	(29,827)	(1,507)
Income tax benefit	(4,765)	(4,612)	(10,868)	(2,985)
Net income (loss)	$ (8,568)	$ (1,293)	$ (18,959)	$ 1,478
Basic:
Net income (loss) per common share (in dollars per share)	$ (0.18)	$ (0.03)	$ (0.39)	$ 0.03
Weighted average number of shares outstanding (in shares)	48,689	45,667	48,669	45,601
Diluted:
Net income (loss) per common share (in dollars per share)	$ (0.18)	$ (0.03)	$ (0.39)	$ 0.03
Weighted average number of shares outstanding (in shares)	48,689	45,667	48,669	46,967
Net income (loss)	$ (8,568)	$ (1,293)	$ (18,959)	$ 1,478
Other comprehensive income (loss):
Foreign currency translation adjustments	7,973	(2,810)	8,041	3,222
Other comprehensive income (loss)	7,973	(2,810)	8,041	3,222
Comprehensive income (loss)	$ (595)	$ (4,103)	$ (10,918)	$ 4,700