Consolidated Statement Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Income Statement [Abstract]
Net sales	$ 6,580,393	$ 6,841,809	$ 12,467,622	$ 13,569,960
Cost of products sold	6,255,114	6,490,437	11,850,454	12,883,260
Gross profit	325,279	351,372	617,168	686,700
Selling, general and administrative expenses	249,816	284,513	497,297	576,109
Restatement and remediation related expenses (Note 1)	164	5,378	782	17,614
Value added tax assessments (Note 9)	(9,563)	(6,229)	(9,563)	(6,229)
LCD settlements, net (Note 1)	(21,527)	0	(60,038)	0
Loss on disposal of subsidiaries (Note 6)	154	0	517	0
Operating expenses:	219,044	283,662	428,995	587,494
Operating income	106,235	67,710	188,173	99,206
Interest expense	(3,320)	7,388	2,402	14,148
Other expense, net	51	616	212	1,067
Income before income taxes	109,504	59,706	185,559	83,991
Provision for income taxes	33,092	20,378	57,870	31,196
Net income	$ 76,412	$ 39,328	$ 127,689	$ 52,795
Net income per share:
Basic	$ 2.09	$ 1.03	$ 3.48	$ 1.38
Diluted	$ 2.09	$ 1.03	$ 3.47	$ 1.38
Weighted average common shares outstanding:
Basic	36,506	38,244	36,661	38,191
Diluted	36,615	38,368	36,829	38,342