Revenue Recognition (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017		Oct. 31, 2018	Oct. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 1,072,982	$ 1,024,993	[1]	$ 2,309,423	$ 2,092,040	[1]
Cost of goods sold	690,882	633,897	[2]	1,461,252	1,296,239	[2]
Selling, general and administrative expenses	232,052	242,740		632,983	636,000
Operating profit	140,015	141,450		186,320	132,321
Income tax expense	33,843	46,322		39,877	35,454
Net income	$ 94,025	$ 81,625		$ 113,987	$ 62,666
Net income per common share
Basic (in dollars per share)	$ 1.91	$ 1.67		$ 2.32	$ 1.29
Diluted (in dollars per share)	$ 1.86	$ 1.65		$ 2.26	$ 1.27
Without Adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 1,081,879			$ 2,322,675
Cost of goods sold	690,367			1,458,494
Selling, general and administrative expenses	240,916			653,602
Operating profit	140,563			181,711
Income tax expense	34,039			38,632
Net income	$ 94,377			$ 110,623
Net income per common share
Basic (in dollars per share)	$ 1.92			$ 2.25
Diluted (in dollars per share)	$ 1.87			$ 2.20
Impact of Adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ (8,897)			$ (13,252)
Cost of goods sold	515			2,758
Selling, general and administrative expenses	(8,864)			(20,619)
Operating profit	(548)			4,609
Income tax expense	(196)			1,245
Net income	$ (352)			$ 3,364
Net income per common share
Basic (in dollars per share)	$ (0.01)			$ 0.07
Diluted (in dollars per share)	$ (0.01)			$ 0.06

[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.