Unaudited Quarterly Financial Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Jul. 31, 2013		Apr. 30, 2013		Jan. 31, 2013		Oct. 31, 2012		Jul. 31, 2012		Apr. 30, 2012		Jan. 31, 2012		Oct. 31, 2011		Jul. 31, 2013		Jul. 31, 2012		Jul. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 309,097		$ 300,971		$ 271,175		$ 270,866		$ 269,089		$ 271,151		$ 255,052		$ 273,396		$ 1,152,109		$ 1,068,688		$ 1,059,355
Gross Profit	157,011		158,532		141,013		149,524		147,453		150,430		141,237		150,450		606,080		589,570		587,950
Operating Income (Loss)	(179,338)	[1]	30,115	[1]	20,968	[1]	42,628	[1]	34,066	[1]	42,228	[1]	37,393	[1]	42,745	[1]	(85,627)	[1]	156,432	[1]	145,759
Earnings (loss) from continuing operations	(176,234)		20,996		(11,364)		25,786		20,869		27,311		26,436		27,855		(98,746)		139,424		127,624
Impairment charges	$ 204,448																$ 204,448		$ 0		$ 0

[1] In fiscal 2013, the Company recorded before tax impairment charges of $204,448 in the fourth quarter ended July 31, 2013 and before tax restructuring charges of $1,933, $8,540 and $15,573 in the second, third and fourth quarters of fiscal 2013, respectively, for a total of $26,046. In fiscal 2012, the Company recorded before tax restructuring charges of $1,977 and $4,107 in the third and fourth quarters of fiscal 2012, respectively, for a total of $6,084.