Summary of Business Operations and Significant Accounting Policies (Tables)

12 Months Ended

Jul. 31, 2013

Property, Plant, and Equipment

Property, plant, and equipment consisted of the following:

	Estimated Useful  Lives (Years)	July 31,
		2013			2012
Property, plant, and equipment:
Land and land improvements	N/A	$	7,431		$	7,209
Building and improvements	35 to 40		82,966			74,954
Leasehold and capital lease improvements	lesser of useful life or the lease term		10,739			11,147
Manufacturing and engineering equipment	4 to 7		103,434			82,380
Furniture, fixtures, and computer equipment	3 to 7		22,861			17,478
Motor vehicles	3 to 5		1,996			1,405
			229,427			194,573
Less accumulated depreciation and amortization			(118,444	)		(97,804	)
Total property, plant and equipment		$	110,983		$	96,769