Revenue Recognition (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017		Jul. 31, 2018	Jul. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 624,698	$ 538,006	[1]	$ 1,236,441	$ 1,067,048	[1]
Cost of goods sold	393,154	335,016	[2]	770,370	662,343	[2]
Selling, general and administrative expenses	198,860	195,849		400,931	393,260
Operating profit	23,229	(3,595)		46,305	(9,129)
Income tax expense	2,914	$ (4,765)		6,034	(10,868)
Net income	$ 10,077			$ 19,962	$ (18,959)
Net income per common share
Basic (in dollars per share)	$ 0.20	$ (0.18)		$ 0.41	$ (0.39)
Diluted (in dollars per share)	$ 0.20	$ (0.18)		$ 0.40	$ (0.39)
Without Adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 621,455			$ 1,240,796
Cost of goods sold	391,964			768,127
Selling, general and administrative expenses	203,963			412,686
Operating profit	16,073			41,148
Income tax expense	1,204			4,593
Net income	$ 4,631			$ 16,246
Net income per common share
Basic (in dollars per share)	$ 0.09			$ 0.33
Diluted (in dollars per share)	$ 0.09			$ 0.32
Impact of Adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales, adjustments	$ 3,243			$ (4,355)
Cost of goods sold	1,190			2,243
Selling, general and administrative expenses, adjustments	(5,103)			(11,755)
Operating profit	7,156			5,157
Income tax expense	1,710			1,441
Net income	$ 5,446			$ 3,716
Net income per common share
Basic (in dollars per share)	$ 0.11			$ 0.08
Diluted (in dollars per share)	$ 0.11			$ 0.08

[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.

[2] Certain reclassifications have been made as a result of the Company's reclassifying the impact of certain components of foreign currency gain (loss) from cost of goods sold and interest expense to other income.