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Property, Plant and Equipment
12 Months Ended
Aug. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment

A summary of property, plant and equipment as of August 31, 2012 and 2011 is as follows:

 
2012
 
2011
 
(Dollars in thousands)
Land and land improvements
$
145,831

 
$
125,170

Buildings
598,269

 
533,231

Machinery and equipment
3,786,488

 
3,481,046

Office and other
109,136

 
96,841

Construction in progress
405,755

 
257,940

 
5,045,479

 
4,494,228

Less accumulated depreciation and amortization
2,259,155

 
2,074,014

 
$
2,786,324

 
$
2,420,214



Depreciation expense for the years ended August 31, 2012, 2011 and 2010, was $199.8 million, $205.2 million and $187.5 million, respectively.

The Company is leasing certain of its wheat milling facilities and related equipment to Horizon Milling, LLC (Horizon Milling) under an operating lease agreement. The net book value of the leased milling assets at August 31, 2012 and 2011 was $49.6 million and $53.9 million, respectively, net of accumulated depreciation of $82.1 million and $74.7 million, respectively.