Consolidated Statement Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Income Statement [Abstract]
Net sales	$ 8,175,174	$ 8,406,424
Cost of products sold	7,643,515	7,897,045
Gross profit	531,659	509,379
Selling, general and administrative expenses	427,863	405,534
Acquisition, integration and restructuring expenses	17,681	6,221
Operating expenses	445,544	411,755
Operating income	86,115	97,624
Interest expense	17,034	26,257
Other expense (income), net	8,948	(693)
Income before income taxes	60,133	72,060
Provision for income taxes	12,068	16,660
Net income	$ 48,065	$ 55,400
Earnings per share:
Basic	$ 1.35	$ 1.50
Diluted	$ 1.34	$ 1.49
Weighted average common shares outstanding:
Basic	35,688	37,011
Diluted	36,002	37,247