Consolidated Statement Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Income Statement [Abstract]
Net sales	$ 6,841,809	$ 6,327,476	$ 13,569,960	$ 12,475,233
Cost of products sold	6,490,437	6,011,636	12,883,260	11,836,979
Gross profit	351,372	315,840	686,700	638,254
Selling, general and administrative expenses	284,513	275,018	576,109	558,378
Restatement and remediation related expenses (Note 1)	5,378	10,963	17,614	13,986
Value Added Tax Assessment	(6,229)	0	(6,229)	0
Operating Expenses	283,662	285,981	587,494	572,364
Operating income	67,710	29,859	99,206	65,890
Interest expense	7,388	6,219	14,148	13,317
Other expense (income), net	616	654	1,067	(1,510)
Income before income taxes	59,706	22,986	83,991	54,083
Provision for income taxes	20,378	8,291	31,196	21,628
Net income	$ 39,328	$ 14,695	$ 52,795	$ 32,455
Net income per share:
Basic (in USD per share)	$ 1.03	$ 0.39	$ 1.38	$ 0.85
Diluted (in USD per share)	$ 1.03	$ 0.38	$ 1.38	$ 0.85
Weighted average common shares outstanding:
Basic (shares)	38,244	38,043	38,191	37,976
Diluted (shares)	38,368	38,180	38,342	38,177