Consolidated Statement Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Income Statement [Abstract]
Revenues	$ 8,406,424	$ 8,548,319
Cost of products sold	7,897,045	8,025,202
Gross profit	509,379	523,117
Selling, general and administrative expenses	405,816	422,361
Acquisition, integration and restructuring expenses	6,221	33,225
Legal settlements and other, net	(282)	(2,965)
Operating expenses	411,755	452,621
Operating income	97,624	70,496
Interest expense	26,257	25,922
Other (income) expense, net	(693)	1,917
Income before income taxes	72,060	42,657
Provision for income taxes	16,660	8,958
Net income	$ 55,400	$ 33,699
Earnings per share:
Basic	$ 1.50	$ 0.88
Diluted	$ 1.49	$ 0.87
Weighted average common shares outstanding:
Basic	37,011	38,281
Diluted	37,247	38,561