Acquisitions and Divestitures - Schedule of Purchase Price Allocation (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Dec. 28, 2012	Jul. 31, 2012	May 02, 2012	Jul. 31, 2011	Aug. 31, 2010	Jul. 31, 2013 Taxes, other than income taxes [Member]	Jul. 31, 2013 Accrued income taxes [Member]	Jul. 31, 2013 Cash acquired [Member]	Jul. 31, 2012 Pervaco [Member]	Apr. 30, 2012 Grafo [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price										$ 12,111	$ 3,039
Cash and cash equivalents	12,904		5,082		1,876				12,904
Accounts receivable — net	21,178
Total inventories	16,788
Prepaid expenses and other current assets	3,915
Goodwill	170,180		22,844		4,792
Other intangible assets	109,300
Other assets	483
Property, plant and equipment	18,015		2,743		415
Accounts payable	(9,921)
Wages and amounts withheld from employees	(4,234)
Liabilities assumed	(37,747)		(8,987)	(7,555)	(1,446)		(600)	(57)
Other current liabilities	(5,045)
Other long-term liabilities	(18,845)
Cost of acquired entity	314,061
Less: cash acquired	(12,904)		(5,082)		(1,876)				(12,904)
Fair value of total consideration transferred	168,724		23,792	46,636	4,624	9,416
Finite-Lived Customer Relationships, Gross		102,500	8,903		1,846					2,468	961
Acquired Indefinite-lived Intangible Asset, Amount			6,878		487					1,538
Finite-Lived Noncompete Agreements, Gross			186							91
Business Acquisition Purchase Price Allocation Debt Assumed			1,432
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net	$ 301,157		$ 37,649		$ 7,970