Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Income Statement [Abstract]
Net sales	$ 962,329	$ 992,454	$ 1,826,742	$ 1,848,142
Cost of sales	646,454	636,610	1,241,811	1,211,638
Gross profit	315,875	355,844	584,931	636,504
Selling, general and administrative expenses	237,814	238,992	466,850	465,756
Income from operations	78,061	116,852	118,081	170,748
Other income, net	3,498	1,746	6,178	1,826
Income before income taxes	81,559	118,598	124,259	172,574
Income tax expense	21,239	25,789	31,354	38,505
Net income	$ 60,320	$ 92,809	$ 92,905	$ 134,069
Net income per common share:
Basic	$ 0.61	$ 0.85	$ 0.91	$ 1.23
Diluted	$ 0.61	$ 0.84	$ 0.91	$ 1.22
Weighted-average common shares outstanding:
Basic	99,095,562	108,831,399	101,722,244	108,663,990
Diluted	99,602,465	110,433,840	102,427,040	110,091,586

The aggregate cost of goods produced and sold and services rendered during the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227