Consolidated Statement Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Income Statement [Abstract]
Net sales	$ 6,428,540	$ 6,761,181	$ 18,896,162	$ 20,331,141
Cost of products sold	6,113,696	6,426,196	17,964,150	19,309,456
Gross profit	314,844	334,985	932,012	1,021,685
Operating expenses:	246,791	268,240	675,786	855,734
Selling, general and administrative expenses	249,611	271,235	746,908	847,344
LCD settlements, net (Note 1)	(3,049)	(5,059)	(63,087)	(5,059)
Value added tax assessments (Note 10)	0	0	(9,563)	(6,229)
Restatement and remediation related expenses (Note 1)	47	2,064	829	19,678
Loss on disposal of subsidiaries (Note 7)	182	0	699	0
Operating income	68,053	66,745	256,226	165,951
Interest expense	5,619	6,491	8,021	20,639
Other expense (income), net	898	(225)	1,110	842
Income before income taxes	61,536	60,479	247,095	144,470
Provision for income taxes	19,636	18,779	77,506	49,975
Net income	$ 41,900	$ 41,700	$ 169,589	$ 94,495
Net income per share:
Basic	$ 1.19	$ 1.09	$ 4.69	$ 2.47
Diluted	$ 1.18	$ 1.09	$ 4.66	$ 2.46
Weighted average common shares outstanding:
Basic	35,214	38,253	36,174	38,212
Diluted	35,397	38,433	36,354	38,376